The following discussion and analysis is meant to provide material information relevant to an assessment of the financial condition and results of operations of our company, including an evaluation of the amounts and certainty of cash flows from operations and from outside resources, so as to allow investors to better view our company from management's perspective. The following discussion of our financial condition and results of operations should be read in conjunction with our financial statements and the notes to those financial statements appearing elsewhere in this Annual Report on Form 10-K. This discussion contains forward-looking statements that involve significant risks and uncertainties. As a result of many factors, such as those set forth in Part I, Item 1A. Risk Factors, of this Annual Report on Form 10-K, our actual results may differ materially from those anticipated in these forward-looking statements.

We are a science-driven global biopharmaceutical company focused on the discovery, development and commercialization of clinically differentiated medicines that provide benefits to patients with rare disorders. Our ability to innovate to identify new therapies and to globally commercialize products is the foundation that drives investment in a robust and diversified pipeline of transformative medicines. Our mission is to provide access to best-in-class treatments for patients who have few or no treatment options. Our strategy is to leverage our strong scientific and clinical expertise and global commercial infrastructure to bring therapies to patients. We believe that this allows us to maximize value for all of our stakeholders. We have a portfolio pipeline that includes several commercial products and product candidates in various stages of development, including clinical, pre-clinical and research and discovery stages, focused on the development of new treatments for multiple therapeutic areas for rare diseases.

We have two products, Translarna™ (ataluren) and Emflaza® (deflazacort), for the treatment of Duchenne muscular dystrophy, or DMD, a rare, life threatening disorder. Translarna has marketing authorization in the European Economic Area, or EEA, and Brazil for the treatment of nonsense mutation Duchenne muscular dystrophy, or nmDMD, in ambulatory patients aged two years and older and in Russia for the treatment of nmDMD in patients aged two years and older. In



                                      139

Table of Contents

July 2020, the European Commission approved the removal of the statement "efficacy has not been demonstrated in non-ambulatory patients" from the indication statement for Translarna. During the year ended December 31, 2021, we recognized $236.0 million in sales of Translarna. We hold worldwide commercialization rights to Translarna for all indications in all territories. Emflaza is approved in the United States for the treatment of DMD in patients two years and older. During the year ended December 31, 2021, Emflaza achieved net sales of $187.3 million.

Our marketing authorization for Translarna in the EEA is subject to annual review and renewal by the European Commission following reassessment by the European Medicines Agency, or EMA, of the benefit-risk balance of the authorization, which we refer to as the annual EMA reassessment. In June 2021, the European Commission renewed our marketing authorization, making it effective, unless extended, through August 5, 2022. In February 2022, we submitted a marketing authorization renewal request to the EMA. This marketing authorization is further subject to a specific obligation to conduct and submit the results of an 18-month, placebo-controlled trial, followed by an 18-month open-label extension, which we refer to together as Study 041. We expect results from the placebo-controlled trial to be available in mid-2022. We then expect to submit a report on the placebo-controlled trial and the open-label extension data that has been collected to date to the EMA by the end of the third quarter of 2022, as required.

Each country, including each member state of the EEA, has its own pricing and reimbursement regulations. In order to commence commercial sale of product pursuant to our Translarna marketing authorization in any particular country in the EEA, we must finalize pricing and reimbursement negotiations with the applicable government body in such country. As a result, our commercial launch will continue to be on a country-by-country basis. We also have made, and expect to continue to make, product available under early access programs, or EAP programs, both in countries in the EEA and other territories. Our ability to negotiate, secure and maintain reimbursement for product under commercial and EAP programs can be subject to challenge in any particular country and can also be affected by political, economic and regulatory developments in such country.

There is substantial risk that if we are unable to renew our EEA marketing authorization during any annual renewal cycle, or if our product label is materially restricted, or if Study 041 does not provide the data necessary to maintain our marketing authorization, we would lose all, or a significant portion of, our ability to generate revenue from sales of Translarna in the EEA and other territories.

Translarna is an investigational new drug in the United States. During the first quarter of 2017, we filed a New Drug Application, or NDA, for Translarna for the treatment of nmDMD over protest with the United States Food and Drug Administration, or FDA. In October 2017, the Office of Drug Evaluation I of the FDA issued a Complete Response Letter for the NDA, stating that it was unable to approve the application in its current form. In response, we filed a formal dispute resolution request with the Office of New Drugs of the FDA. In February 2018, the Office of New Drugs of the FDA denied our appeal of the Complete Response Letter. In its response, the Office of New Drugs recommended a possible path forward for the ataluren NDA submission based on the accelerated approval pathway. This would involve a re-submission of an NDA containing the current data on effectiveness of ataluren with new data to be generated on dystrophin production in nmDMD patients' muscles. We followed the FDA's recommendation and collected, using newer technologies via procedures and methods that we designed, such dystrophin data in a new study, Study 045, and announced the results of Study 045 in February 2021. Study 045 did not meet its pre-specified primary endpoint. We expect results from the placebo-controlled trial of Study 041 to be available in mid-2022, and subject to a positive outcome in that study, we expect to re-submit the NDA.

We hold the rights for the commercialization of Tegsedi® (inotersen) and Waylivra® (volanesorsen) for the treatment of rare diseases in countries in Latin America and the Caribbean pursuant to a Collaboration and License Agreement, or the Tegsedi-Waylivra Agreement, dated August 1, 2018, by and between us and Akcea Therapeutics, Inc., or Akcea, a subsidiary of Ionis Pharmaceuticals, Inc. Tegsedi has received marketing authorization in the United States, European Union, or EU, and Brazil for the treatment of stage 1 or stage 2 polyneuropathy in adult patients with hereditary transthyretin amyloidosis, or hATTR amyloidosis. We have initiated our commercial launch for Tegsedi for the treatment of hATTR amyloidosis in Brazil and we continue to make Tegsedi available in certain other countries within Latin America and the Caribbean through early access programs. In August 2021, ANVISA, the Brazilian health regulatory authority, approved Waylivra as the first treatment for familial chylomicronemia syndrome, or FCS, in Brazil and we have initiated our commercial launch in Brazil while continuing to make Waylivra available in certain other countries within Latin



                                      140

  Table of Contents

America and the Caribbean through EAP programs. Waylivra has also received marketing authorization in the EU for the treatment of FCS. Additionally, we submitted an application to ANVISA in December 2021 for the approval of Waylivra for the treatment of familial partial lipodystrophy, or FPL, and we expect a regulatory decision on approval in the second half of 2022.

We also have a spinal muscular atrophy, or SMA, collaboration with F. Hoffman-La Roche Ltd. and Hoffman-La Roche Inc., which we refer to collectively as Roche, and the Spinal Muscular Atrophy Foundation, or SMA Foundation. The SMA program has one approved product, Evrysdi® (risdiplam), which was approved by the FDA in August 2020 for the treatment of SMA in adults and children two months and older and by the European Commission in March 2021 for the treatment of 5q SMA in patients two months and older with a clinical diagnosis of SMA Type 1, Type 2 or Type 3 or with one to four SMN2 copies. Evrysdi also received marketing authorization for the treatment of SMA in Brazil in October 2020 and Japan in June 2021. In January 2022, the FDA granted priority review of a supplemental new drug application for Evrysdi to expand the indication to include pre-symptomatic infants under two months old with SMA. In addition to our SMA program, our splicing platform also includes PTC518, which is being developed for the treatment of Huntington's disease, or HD. We announced the results from our Phase 1 study of PTC518 in healthy volunteers in September 2021 demonstrating dose-dependent lowering of huntingtin messenger ribonucleic acid and protein levels, that PTC518 efficiently crosses blood brain barrier at significant levels and that PTC518 was well tolerated. We expect to initiate a Phase 2 study of PTC518 in the first quarter of 2022.

We have a pipeline of gene therapy product candidates for rare monogenic diseases that affect the central nervous system, or CNS, including PTC-AADC for the treatment of Aromatic L-Amino Acid Decarboxylase, or AADC, deficiency, a rare CNS disorder arising from reductions in the enzyme AADC that result from mutations in the dopa decarboxylase gene. In January 2020, we submitted a marketing authorization application, or MAA, for PTC-AADC for the treatment of AADC deficiency in the EEA to the EMA and we expect an opinion from the CHMP in April 2022. We are also preparing a biologics license application, or BLA, for PTC-AADC for the treatment of AADC deficiency in the United States. In response to discussions with the FDA, we intend to provide additional information concerning the use of the commercial cannula for PTC-AADC in young patients. We expect to submit a BLA to the FDA in the second quarter of 2022.

Our Bio-e platform consists of small molecule compounds that target oxidoreductase enzymes that regulate oxidative stress and inflammatory pathways central to the pathology of a number of CNS diseases. The two most advanced molecules in our Bio-e platform are vatiquinone and PTC857. We initiated a registration-directed Phase 2/3 placebo-controlled trial of vatiquinone in children with mitochondrial disease associated seizures in the third quarter of 2020. We have experienced delays in enrolling this trial due to the COVID-19 pandemic and now anticipate results from this trial to be available in the fourth quarter of 2022. We also initiated a registration-directed Phase 3 trial of vatiquinone in children and young adults with Friedreich ataxia in the fourth quarter of 2020 and anticipate results from this trial to be available in the second quarter of 2023. In the third quarter of 2021, we completed a Phase 1 trial in healthy volunteers to evaluate the safety and pharmacology of PTC857. PTC857 was found to be well-tolerated with no reported serious adverse events while demonstrating predictable pharmacology. We expect to initiate a Phase 2 trial of PTC857 for amyotrophic lateral sclerosis in the second quarter of 2022.

The most advanced molecule in our metabolic platform is PTC923, an oral formulation of synthetic sepiapterin, a precursor to intracellular tetrahydrobiopterin, which is a critical enzymatic cofactor involved in metabolism and synthesis of numerous metabolic products, for orphan diseases. We initiated a registration-directed Phase 3 trial for PTC923 for phenylketonuria, or PKU, in the third quarter of 2021 and expect results from this trial to be available by the end of 2022.

We also have two oncology agents in that are in clinical development, unesbulin and emvododstat. We completed our Phase 1 trials evaluating unesbulin in leiomyosarcoma, or LMS, and diffuse intrinsic pontine glioma, or DIPG, in the fourth quarter of 2021. We expect to initiate a registration-directed Phase 2/3 trial of unesbulin for the treatment of LMS in the second quarter of 2022 and we expect to initiate a registration-directed Phase 2 trial of unesbulin for the treatment of DIPG in the third quarter of 2022. We completed our Phase 1 trial evaluating emvododstat, a small molecule dihydrooratate dehydrogenase inhibitor that inhibits de novo pyrimidine nucleotide synthesis, in acute myelogenous leukemia, or AML, in the fourth quarter of 2021. We expect to provide further updates regarding our emvododstat program at a later date.



                                      141

Table of Contents

In June 2020, we initiated a Phase 2/3 clinical trial evaluating the efficacy and safety of emvododstat in patients hospitalized with COVID-19. In February 2021, we announced the completion of the first stage of the Phase 2/3 trial. We expect results from this trial to be available in the first half of 2022.

In addition, we have a pipeline of product candidates and discovery programs that are in early clinical, pre-clinical and research and development stages focused on the development of new treatments for multiple therapeutic areas for rare diseases.

COVID-19 Impact

The global pandemic caused by a strain of novel coronavirus, COVID-19, has impacted and is continuing to impact the timing of certain of our clinical trials and regulatory submissions as well as other aspects of our business operations. In particular, the following expectations have been revised as a result of the impact or expected impact of the COVID-19 pandemic:

We have experienced delays in enrolling patients for our registration-directed

Phase 2/3 placebo-controlled trial of vatiquinone in children with

• mitochondrial disease associated seizures as some patients have been unable or


   hesitant to travel to clinical sites due to the COVID-19 pandemic.  We
   anticipate results from this trial to be available in the fourth quarter of
   2022.


   As a result of the COVID-19 pandemic, the Brazilian Ministry of Health is
   continuing to experience significant delays processing centralized group

• purchase orders. Almost all of our product revenue for Translarna in Brazil is


   attributable to such purchase orders. These centralized group purchase order
   delays have caused, and may continue to cause, fluctuations in our ability to
   generate revenue in Brazil.


   As of the date of this Report on Form 10-K, except as otherwise disclosed with
   respect to Translarna product revenue in Brazil, our ability to generate
   revenue has not been significantly affected by the COVID-19 pandemic. However,
   due to travel restrictions, social distancing and the continued global

• uncertainty resulting from the COVID-19 pandemic, we may have difficulty


   identifying and accessing new patients, supporting existing patients and
   meeting with regulatory authorities or other governmental entities, which may
   negatively affect our future revenue. We continue to support our existing
   patient base and remotely connect with them, as necessary. We have not
   encountered any material issues in supplying those patients.


   As previously disclosed, in response to the global uncertainty caused by the

• COVID-19 pandemic, we are continuing to prioritize our expenses where we deem

appropriate and strategically positioning our capital allocation.

The COVID-19 pandemic and responsive measures thereto may result in further negative impacts, including additional delays in our clinical and regulatory activities and further fluctuations in our revenue. We cannot be certain what the overall impact of the COVID-19 pandemic will be on our business and it has the potential to materially adversely affect our business, financial condition, results of operations, and prospects. For additional information, see "Item 1A. Risk Factors - We face risks related to health epidemics and other widespread outbreaks of contagious disease, which are, and may continue to, delay our ability to complete our ongoing clinical trials and initiate future clinical trials, disrupt regulatory activities and have other adverse effects on our business and operations, including the novel coronavirus (COVID-19) pandemic, which has disrupted, and may continue to disrupt, our operations and may significantly impact our operating results. In addition, the COVID-19 pandemic has caused substantial disruption in the financial markets and economies, which could result in adverse effects on our business and operations."

Overview-Funding

The success of our products and any other product candidates we may develop, depends largely on obtaining and maintaining reimbursement from governments and third-party insurers. During 2021, our revenues were primarily generated from sales of Translarna for the treatment of nmDMD in countries where we were able to obtain acceptable commercial pricing and reimbursement terms and in select countries where we are permitted to distribute Translarna under



                                      142

Table of Contents

our EAP programs, and from sales of Emflaza for the treatment of DMD in the United States. We have also recognized revenue associated with milestone and royalty payments from Roche pursuant to a License and Collaboration Agreement, or the SMA License Agreement, by and among us, Roche and, for the limited purposes set forth therein, the SMA Foundation, under our SMA program.

See "Item 1. Business-Commercial Matters-Market Access Considerations" for additional information and "Item 1A. Risk Factors-Commercialization of Translarna has been in, and is expected to continue to take place in, countries that tend to impose strict price controls, which may adversely affect our revenues. Failure to obtain and maintain acceptable pricing and reimbursement terms for Translarna for the treatment of nmDMD in the EEA and other countries where Translarna is available would delay or prevent us from marketing our product in such regions, which would adversely affect our business, results of operations, and financial condition."

In January 2019, we closed an underwritten public offering of our common stock.

We issued and sold an aggregate of 7,563,725 shares of common stock at a public offering price of $30.20 per share, including 843,725 shares issued upon exercise by the underwriter of its option to purchase additional shares in February 2019. We received net proceeds of approximately $224.2 million after deducting underwriting discounts and commissions and other offering expenses payable by us.

In August 2019, we entered into an At the Market Offering Sales Agreement, or the Sales Agreement, with Cantor Fitzgerald and RBC Capital Markets, LLC, or together, the Sales Agents, pursuant to which, we may offer and sell shares of our common stock, having an aggregate offering price of up to $125.0 million from time to time through the Sales Agents by any method that is deemed to be an "at the market offering" as defined in Rule 415(a)(4) promulgated under the Securities Act of 1933, as amended, or the Securities Act. During the year ended December 31, 2019, we issued and sold an aggregate of 63,926 shares of common stock pursuant to the Sales Agreement at a weighted average public offering price of $46.60 per share. We received net proceeds of $2.6 million after deducting agent discounts and commissions and other offering expenses payable by us. During the year ended December 31, 2020, we issued and sold an aggregate of 542,470 shares of common stock pursuant to the Sales Agreement at a weighted average public offering price of $53.37 per share. We received net proceeds of $28.1 million after deducting agent discounts and commissions and other offering expenses payable by us. We did not issue or sell any shares of common stock pursuant to the Sales Agreement during the year ending December 31, 2021. The remaining shares of our common stock available to be issued and sold, under the Sales Agreement, have an aggregate offering price of up to $93.0 million as of December 31, 2021.

In September 2019, we closed an underwritten public offering of our common stock. We issued and sold an aggregate of 2,475,248 shares of common stock at a public offering price of $40.40 per share. The offering included an option to purchase up to an additional 371,287 shares for a period of 30 days following the offering. This option was not exercised by the underwriter. We received net proceeds of $97.0 million after deducting underwriting discounts and commissions and other offering expenses payable by us.

In September 2019, we issued $287.5 million aggregate principal amount of 1.50% convertible senior notes due September 15, 2026, or the 2026 Convertible Notes, which included an option to purchase up to an additional $37.5 million in aggregate principal amount of the 2026 Convertible Notes, which was exercised in full by the initial purchasers. We received net proceeds of $279.3 million after deducting the initial purchasers' discounts and commissions and the offering expenses payable by us. See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations-Liquidity and capital resources-Sources of Liquidity" for additional information.

On October 25, 2019, we completed our acquisition of substantially all of the assets of BioElectron Technology Corporation, or BioElectron, for total upfront consideration of $10.0 million in cash less (i) transaction expenses incurred by BioElectron, (ii) the amount of outstanding indebtedness of BioElectron including a $4.0 million loan advance to BioElectron plus accrued and unpaid interest thereon and (iii) $1.5 million held in an escrow account to secure potential indemnification obligations owed to us.

On April 29, 2020, we entered into a Rights Exchange Agreement, or the Rights Exchange Agreement, pursuant to which we issued 2,821,176 shares of our common stock and paid $36.9 million, in the aggregate, to certain former equityholders, or the Participating Rightholders, of Agilis Biotherapeutics, Inc., or Agilis, in exchange for the cancellation



                                      143

Table of Contents

and forfeiture by the Participating Rightholders of their rights to receive certain milestone-based contingent payments under the Agreement and Plan of Merger, dated as of July 19, 2018 by and among us, Agility Merger Sub, Inc. and, solely in its capacity as the representative, agent and attorney-in-fact of the equityholders of Agilis, Shareholder Representative Services LLC, or the Agilis Merger Agreement.

On May 29, 2020, we acquired Censa for total upfront consideration composed of (i) cash consideration of $15.0 million, which consisted of an upfront payment of $10.4 million and an additional $4.6 million for the net assets on Censa's opening balance sheet as of the date of the acquisition, and (ii) 845,364 shares of our common stock, which were valued at $42.9 million based on the closing stock price on the acquisition date. The number of shares issued was determined using a 30-day VWAP pursuant to the Censa Merger Agreement.

In July 2020, we entered into a Royalty Purchase Agreement, or the Royalty Purchase Agreement, with RPI 2019 Intermediate Finance Trust, or RPI, pursuant to which we sold to RPI 42.933%, or the Assigned Royalty Payment, of our right to receive sales-based royalty payments, or the Royalty, on worldwide net sales of Evrysdi and any other product developed pursuant to the SMA License Agreement. In consideration for the sale of the Assigned Royalty Payments, RPI paid us $650.0 million in cash consideration. The Royalty Purchase Agreement will terminate 60 days following the earlier of the date on which Roche is no longer obligated to make any payments of the Royalty pursuant to the SMA License Agreement and the date on which RPI has received $1.3 billion in respect of the Assigned Royalty Payments.

In June 2021, we filed a Certificate of Amendment to our Restated Certificate of Incorporation, which increased the number of authorized shares of our common stock from 125,000,000 to 250,000,000 shares.

To date, we have financed our operations primarily through our offering of 3.00% convertible senior notes due August 15, 2022, or the 2022 Convertible Notes offering, our offering of the 2026 Convertible Notes, and, together with the 2022 Convertible Notes, the Convertible Notes, our public offerings of common stock in February 2014, in October 2014, in April 2018, in January 2019, and in September 2019, the common stock issued in our "at the marketing offering", our initial public offering of common stock in June 2013, proceeds from the Royalty Purchase Agreement, private placements of our convertible preferred stock, collaborations, bank and institutional lender debt, grant funding and clinical trial support from governmental and philanthropic organizations and patient advocacy groups in the disease areas addressed by our product candidates. Since 2014, we have also relied on revenue generated from net sales of Translarna for the treatment of nmDMD in territories outside of the United States, and since May 2017, we have generated revenue from net sales of Emflaza for the treatment of DMD in the United States. We have also relied on revenue associated with milestone and royalty payments from Roche pursuant to the SMA License Agreement, under our SMA program.

As of December 31, 2021, we had an accumulated deficit of $2,098.0 million. We had a net loss of $523.9 million, $438.2 million, and $251.6 million for the fiscal years ended December 31, 2021, 2020, and 2019, respectively.

We anticipate that our expenses will continue to increase in connection with our commercialization efforts in the United States, the EEA, Latin America and other territories, including the expansion of our infrastructure and corresponding sales and marketing, legal and regulatory, distribution and manufacturing, including expanding our direct manufacturing capabilities at our leased biologics manufacturing facility and administrative and employee-based expenses. In addition to the foregoing, we expect to continue to incur ongoing research and development expenses for our products and product candidates, including our splicing, gene therapy, Bio-e, metabolic and oncology programs and our studies of emvododstat for COVID-19 as well as studies in our products for maintaining authorizations, including Study 041, label extensions and additional indications. In addition, we may incur substantial costs in connection with our efforts to advance our regulatory submissions. We continue to seek marketing authorization for Translarna for the treatment of nmDMD in territories that we do not currently have marketing authorization in and we may also seek marketing authorization for Translarna for other indications. We submitted an MAA to the EMA for the treatment of AADC deficiency with PTC-AADC in the EEA. We are also preparing a BLA for PTC-AADC for the treatment of AADC deficiency in the United States and we anticipate submitting a BLA to the FDA in the second quarter of 2022. We filed for marketing authorization for Waylivra with ANVISA for the treatment of FPL and we expect a regulatory decision on approval from ANVISA in the second half of 2022. These efforts may significantly impact the timing and extent of our commercialization expenses.



                                      144

Table of Contents

We may seek to expand and diversify our product pipeline through opportunistically in-licensing or acquiring the rights to products, product candidates or technologies and we may incur expenses, including with respect to transaction costs, subsequent development costs or any upfront, milestone or other payments or other financial obligations associated with any such transaction, which would increase our future capital requirements.

With respect to our outstanding 2022 Convertible Notes, cash interest payments are payable on a semi-annual basis in arrears, which require total funding of $4.5 million annually. The 2022 Convertible Notes will mature on August 15, 2022 and we will be required to pay any outstanding principal amount of the 2022 Convertible Notes at that time, unless earlier converted, redeemed or repurchased in accordance with their terms prior to such date. As of February 15, 2022, until the close of business on the business day immediately preceding the maturity date, holders may convert their 2022 Convertible Notes at any time. Upon conversion, we will pay or deliver, as the case may be, cash, shares of our common stock or any combination thereof at our election. With respect to our outstanding 2026 Convertible Notes, cash interest payments are payable on a semi-annual basis in arrears, which will require total funding of $4.3 million annually. In 2021, we paid Akcea an additional milestone payment of $4.0 million upon receipt of regulatory approval for Waylivra from ANVISA for the treatment of FCS. In addition, we expect to pay Marathon Pharmaceuticals, LLC (now known as Complete Pharma Holdings, LLC), or Marathon, a single $50.0 million sales-based milestone in connection with Emflaza sales in 2022. We also expect to pay the former equityholders of Agilis an aggregate of $70.0 million upon the achievement of certain development and regulatory milestones in 2022 relating to PTC-AADC. Furthermore, since we are a public company, we have incurred and expect to continue to incur additional costs associated with operating as such including significant legal, accounting, investor relations and other expenses.

We have never been profitable and we will need to generate significant revenues to achieve and sustain profitability, and we may never do so. Accordingly, we may need to obtain substantial additional funding in connection with our continuing operations. Adequate additional financing may not be available to us on acceptable terms, or at all. If we are unable to raise capital when needed or on attractive terms, we could be forced to delay, reduce or eliminate our research and development programs or our commercialization efforts.

Financial operations overview

To date, our net product revenues have consisted primarily of sales of Translarna for the treatment of nmDMD in territories outside of the United States and sales of Emflaza for the treatment of DMD in the United States. Our process for recognizing revenue is described below under "Critical accounting policies and significant judgments and estimates-Revenue recognition".

Roche and the SMA Foundation Collaboration. In November 2011, we entered into the SMA License Agreement pursuant to which we are collaborating with Roche and the SMA Foundation to further develop and commercialize compounds identified under our SMA program with the SMA Foundation. The research component of this agreement terminated effective December 31, 2014. We are eligible to receive additional payments from Roche if specified events are achieved with respect to each licensed product, including up to $135.0 million in research and development event milestones, up to $325.0 million in sales milestones upon achievement of specified sales events, and up to double digit royalties on worldwide annual net sales of a commercial product. As of December 31, 2021, we had recognized a total of $160.0 million in milestone payments and $59.4 million royalties on net sales pursuant to the SMA License Agreement. As of December 31, 2021, there are no remaining research and development event milestones that we can receive. The remaining potential sales milestones as of December 31, 2021 are $300.0 million upon achievement of certain sales events.

Pursuant to the Royalty Purchase Agreement, we sold to RPI the Assigned Royalty Payment, in consideration for $650.0 million. We have retained a 57.067% interest in the Royalty and all economic rights to receive the remaining potential regulatory and sales milestone payments under the License Agreement. The Royalty Purchase Agreement will terminate 60 days following the earlier of the date on which Roche is no longer obligated to make any payments of the Royalty pursuant to the SMA License Agreement and the date on which RPI has received $1.3 billion in respect of the Assigned Royalty Payments.



                                      145

Table of Contents

Research and development expense

Research and development expenses consist of the costs associated with our research activities, as well as the costs associated with our drug discovery efforts, conducting preclinical studies and clinical trials, manufacturing development efforts and activities related to regulatory filings. Our research and development expenses consist of:

external research and development expenses incurred under agreements with

? third-party contract research organizations and investigative sites,

third-party manufacturing organizations and consultants;

employee-related expenses, which include salaries and benefits, including

? share-based compensation, for the personnel involved in our drug discovery and

development activities; and

facilities, depreciation and other allocated expenses, which include direct and

? allocated expenses for rent and maintenance of facilities, IT, human resources,

and other support functions, depreciation of leasehold improvements and

equipment, and laboratory and other supplies.

We use our employee and infrastructure resources across multiple research projects, including our drug development programs. We track expenses related to our clinical programs and certain preclinical programs on a per project basis.

We expect our research and development expenses to fluctuate in connection with our ongoing activities, particularly in connection with Study 041 and other studies for Translarna for the treatment of nmDMD, our activities under our splicing, gene therapy, Bio-e, metabolic and oncology programs, and our studies of emvododstat for COVID-19 and performance of any post-marketing requirements imposed by regulatory agencies with respect to our products. The timing and amount of these expenses will depend upon the outcome of our ongoing clinical trials and the costs associated with our planned clinical trials. The timing and amount of these expenses will also depend on the costs associated with potential future clinical trials of our products or product candidates and the related expansion of our research and development organization, regulatory requirements, advancement of our preclinical programs, and product and product candidate manufacturing costs.

The following table provides research and development expense for our most advanced principal product development programs, for the years ended December 31, 2021, 2020, and 2019.



                                           December 31,
                                  2021         2020         2019

                                          (in thousands)
Global DMD Franchise            $  83,791    $  80,742    $ 113,312
PTC923                             49,458       59,135            -
Gene Therapy                      150,566      213,206       62,839
Bio-e                              60,964       29,322       10,060
Oncology                           18,618       16,467       21,199
Splicing                           53,429       18,567       10,317
Emvododstat for COVID-19           38,348       13,590            -
Discovery                          85,510       46,614       39,725

Total research and development $ 540,684 $ 477,643 $ 257,452

The successful development of our product and product candidates is highly uncertain. This is due to the numerous risks and uncertainties associated with developing drugs, including the uncertainty of:

? the scope, rate of progress and expense of our clinical trials and other

research and development activities;

? the potential benefits of our product and product candidates over other

therapies;

our ability to market, commercialize and achieve market acceptance for our

? products or any of our product candidates that we are developing or may develop

in the future, including our ability to negotiate pricing and reimbursement


   terms acceptable to us;


 ? clinical trial results;

? the terms and timing of regulatory approvals; and

? the expense of filing, prosecuting, defending and enforcing patent claims and

other intellectual property rights.




                                      146

  Table of Contents

A change in the outcome of any of these variables with respect to the development of any of our products or product candidates could mean a significant change in the costs and timing associated with the development of that product candidates. For example, if the EMA or FDA or other regulatory authority were to require us to conduct clinical trials beyond those which we currently anticipate will be required for the completion of clinical development of any of our products or product candidate or if we experience significant delays in enrollment in any of our clinical trials, we could be required to expend significant additional financial resources and time on the completion of clinical development. In addition, the uncertainty with respect to the duration, nature and extent of negative impacts of the COVID-19 pandemic and responsive measures relating thereto on our ability to successfully enroll our current and future clinical trials, has caused us to experience delays, and may cause us to experience further delays, in our clinical trials and regulatory submissions.

Selling, general and administrative expense

Selling, general and administrative expenses consist primarily of salaries and other related costs for personnel, including share-based compensation expenses, in our executive, legal, business development, commercial, finance, accounting, information technology and human resource functions. Other selling, general and administrative expenses include facility-related costs not otherwise included in research and development expense; advertising and promotional expenses; costs associated with industry and trade shows; and professional fees for legal services, including patent-related expenses, accounting services and miscellaneous selling costs.

We expect that selling, general and administrative expenses will increase in future periods in connection with our continued efforts to commercialize our products, including increased payroll, expanded infrastructure, commercial operations, increased consulting, legal, accounting and investor relations expenses.

Interest expense, net

Interest expense, net consists of interest expense from the liability for the sale of future royalties related to the Royalty Purchase Agreement, the Convertible Notes outstanding, and from our credit and security agreement, or the Credit Agreement, with MidCap Financial Trust that was terminated in July 2020 offset by interest income earned on investments.

Critical accounting policies and significant judgments and estimates

Our management's discussion and analysis of our financial condition and results of operations is based on our financial statements, which we have prepared in accordance with generally accepted accounting principles in the United States. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported revenues and expenses during the reporting periods. Actual results may differ from these estimates under different assumptions or conditions.

Effective January 1, 2021, we early adopted the Financial Accounting Standards Board, or the FASB, Accounting Standards Update, or ASU, 2020-06, "Debt-Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging-Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity" using the modified retrospective method of adoption. ASU 2020-06 simplifies the accounting for convertible instruments by removing certain separation models in Subtopic 470- 20, Debt-Debt with Conversion and Other Options, for convertible instruments. Under ASU 2020-06, the embedded conversion features no longer are separated from the host contract for convertible instruments with conversion features that are not required to be accounted for as derivatives under Topic 815, Derivatives and Hedging, or that do not result in substantial premiums accounted for as paid-in capital. Consequently, a convertible debt instrument will be accounted for as a single liability measured at its amortized cost as long as no other features require bifurcation and recognition as derivatives. By removing those separation models, the interest rate of convertible debt instruments typically will be closer to the coupon interest rate when applying the guidance in Topic 835, Interest. We now account for our Convertible Notes as single liabilities measured at amortized cost. As a result, the adoption of the guidance had a material impact on the consolidated financial statements and accompanying notes, resulting in adjustments of $175.2 million, $54.8 million, and $120.4 million to the opening balances of additional paid-in capital, retained earnings, and long term debt, respectively, as of January 1, 2021.



                                      147

Table of Contents

Additionally, due to the adoption, we reversed the remaining balance of the deferred tax liability of $29.6 million, which was initially recorded in connection with the Convertible Notes. Additionally, we increased the existing valuation allowance by $29.6 million as part of the adoption adjustment. We concluded that the adoption of the ASU did not change our prior valuation allowance conclusions. We have updated our debt note (Note 8) with additional and modified disclosures as required by the standard upon adoption.

Of our policies, the following are considered critical to an understanding of our consolidated financial statements as they require the application of the most subjective and complex judgment, involving critical accounting estimates and assumptions impacting our consolidated financial statements:

? Revenue recognition related to net product revenue

? Liability for sale of future royalties

? Contingent consideration from business combinations

? Indefinite-lived intangible assets annual impairment assessment

Revenue recognition related to net product revenue

Our net product revenue primarily consists of sales of Translarna in territories outside of the U.S. and sales of Emflaza in the U.S., both for the treatment of DMD. We recognize revenue when performance obligations with customers have been satisfied. Our performance obligations are to provide products based on customer orders from distributors, hospitals, specialty pharmacies or retail pharmacies. The performance obligations are satisfied at a point in time when our customer obtains control of the product, which is typically upon delivery. We invoice customers after the products have been delivered and invoice payments are generally due within 30 to 90 days of invoice date. We determine the transaction price based on fixed consideration in its contractual agreements. Contract liabilities arise in certain circumstances when consideration is due for goods not yet provided. As we have identified only one distinct performance obligation, the transaction price is allocated entirely to the product sale. In determining the transaction price, a significant financing component does not exist since the timing from when we deliver product to when the customers pay for the product is typically less than one year. Customers in certain countries pay in advance of product delivery. In those instances, payment and delivery typically occur in the same month.

We record product sales net of any variable consideration, which includes discounts, allowances, rebates related to Medicaid and other government pricing programs, and distribution fees. We use the expected value or most likely amount method when estimating variable consideration, unless discount or rebate terms are specified within contracts. The identified variable consideration is recorded as a reduction of revenue at the time revenues from product sales are recognized. These estimates for variable consideration are adjusted to reflect known changes in factors and may impact such estimates in the quarter those changes are known. Revenue recognized does not include amounts of variable consideration that are constrained. During the years ended December 31, 2021, 2020, and 2019, net product sales in the United States were $187.3 million, $139.0 million, and $101.0 million, respectively, consisting solely of sales of Emflaza, and net product sales outside of the United States were $241.6 million, $194.4 million, and $190.3 million respectively, consisting of sales of Translarna, Tegsedi, and Waylivra. Translarna net product revenues made up $236.0 million, $191.9 million, and $190.0 million of the net product sales outside the United States for the years ended December 31, 2021, 2020, and 2019, respectively.

In relation to customer contracts, we incur costs to fulfill a contract but do not incur costs to obtain a contract. These costs to fulfill a contract do not meet the criteria for capitalization and are expensed as incurred. The Company considers any shipping and handling costs that are incurred after the customer has obtained control of the product as a cost to fulfill a promise. Shipping and handling costs associated with finished goods delivered to customers are recorded as a selling expense.



                                      148

Table of Contents

Liability for sale of future royalties

In July 2020, we entered into the Royalty Purchase Agreement with RPI, pursuant to which we sold to RPI the Assigned Royalty Payment. In consideration for the sale of the Assigned Royalty Payments, RPI paid us $650.0 million in cash consideration. The Royalty Purchase Agreement will terminate 60 days following the earlier of the date on which Roche is no longer obligated to make any payments of the Royalty pursuant to the SMA License Agreement and the date on which RPI has received $1.3 billion in respect of the Assigned Royalty Payments.

The cash consideration obtained pursuant to the Royalty Purchase Agreement is classified as debt and is recorded as "liability for sale of future royalties-current" and "liability for sale of future royalties-noncurrent" on our consolidated balance sheet based on the timing of the expected payments to be made to RPI. The fair value for the liability for sale of future royalties at the time of the transaction was based on our estimates of future royalties expected to be paid to RPI over the life of the arrangement, which was determined using forecasts from market data sources, which are considered Level 3 inputs. The liability will be amortized using the effective interest method over the life of the arrangement, in accordance with the respective guidance. We will utilize the prospective method to account for subsequent changes in the estimated future payments to be made to RPI.

Contingent consideration from business combinations

The consideration for our business acquisitions may include future payments that are contingent upon the occurrence of a particular event or events. The obligations for such contingent consideration payments are recorded at fair value on the acquisition date. The contingent consideration obligations are then evaluated each reporting period. Changes in the fair value of contingent consideration, other than changes due to payments, are recognized as a gain or loss and recorded within the change in the fair value of deferred and contingent consideration in the consolidated statements of operations. The fair value of development and regulatory milestones are estimated utilizing a probability adjusted, discounted cash flow approach. The discount rates are estimated utilizing Corporate B rated bonds maturing in the years of expected payments based on our estimated development timelines for the acquired product candidate. The fair value of the net sales milestones and royalties is based on probability adjusted sales estimates and estimated discount rates and utilizes an option pricing model with Monte Carlo simulation to simulate a range of possible payment scenarios, and the average of the payments in these scenarios is then discounted to calculate present fair value.

Indefinite-lived intangible assets annual impairment assessment

Indefinite-lived intangible assets consist of IPR&D acquired in business combinations. Intangible assets with indefinite lives, including IPR&D, are tested for impairment if impairment indicators arise and, at a minimum, annually. The indefinite-lived intangible asset impairment test consists of a one-step analysis that compares the fair value of the intangible asset with its carrying amount. If the carrying amount of an intangible asset exceeds its fair value, an impairment loss is recognized in an amount equal to that excess. Several methods may be used to determine the estimated fair value of the IPR&D. We utilize the "income method", and use estimated future net cash flows that are derived from projected sales revenues and estimated costs. These projections are based on factors such as relevant market size, patent protection, and expected pricing and industry trends. The estimated future net cash flows are then discounted to the present value using an appropriate discount rate. The estimated fair value is then compared to the carrying value of IPR&D. We performed a quantitative annual impairment test for our indefinite-lived intangible assets as of October 1, 2021 and concluded that no impairment exists as of December 31, 2021.

For a description of our significant accounting policies, see note 2 to our consolidated financial statements.



                                      149

Table of Contents

Year ended December 31, 2021 compared to year ended December 31, 2020

The following table summarizes revenues and selected expense and other income data for the year ended December 31, 2021 and 2020:



                                                          Year ended
                                                        December 31,               Change
(in thousands)                                        2021          2020        2021 vs. 2020
Net product revenue                                $  428,904    $  333,401    $        95,503
Collaboration revenue                                  55,046        42,579    $        12,467
Royalty revenue                                        54,643         4,786    $        49,857
Cost of product sales, excluding amortization
of acquired intangible assets                          32,328        18,942    $        13,386
Amortization of acquired intangible assets             54,751        36,892    $        17,859
Research and development expense                      540,684       477,643    $        63,041
Selling, general and administrative expense           285,773       245,164    $        40,609
Change in the fair value of deferred and
contingent consideration                                (500)        23,280    $      (23,780)
Settlement of deferred and contingent
consideration                                               -        10,613           (10,613)
Interest expense, net                                (86,022)      (56,352)    $      (29,670)
Other (expense) income, net                          (57,875)        85,188    $     (143,063)
Income tax expense                                    (5,561)      (35,228)    $        29,667

Net product revenue. Net product revenue was $428.9 million for the year ended December 31, 2021, an increase of $95.5 million, or 29%, from net product revenue of $333.4 million for the year ended December 31, 2020. Translarna net product revenues were $236.0 million for the year ended December 31, 2021, an increase of $44.1 million, or 23%, compared to $191.9 million for the year ended December 31, 2020. These results were driven by treatment of new patients, continued high compliance, and geographic expansion. Emflaza net product revenues were $187.3 million for the year ended December 31, 2021, an increase of $48.3 million, or 35%, compared to $139.0 million for the year ended December 31, 2021. These results were driven by continued new prescriptions, continued high compliance, and more favorable access. The remaining increase of $3.1 million was due to an increase in net product sales of Tegsedi and Waylivra.

Collaboration revenue. Collaboration revenue was $55.0 million for the year ended December 31, 2021, an increase of $12.5 million, or 29%, from collaboration revenue of $42.6 million for the year ended December 31, 2020. The increase is primarily related to three milestones that were triggered from Roche in the years ended December 31, 2021. In March 2021, the first commercial sale of Evrysdi in the EU was made. This event triggered a $20.0 million milestone payment to us from Roche. Additionally, in June 2021, the Japanese Ministry of Health, Labor and Welfare approved Evrysdi for the treatment of SMA in Japan. In August 2021, the first commercial sale of Evrysdi in Japan triggered a $10.0 million milestone payment to us from Roche. In December 2021, we recorded our first sales milestone of $25.0 million for the achievement of $500.0 million in worldwide annual net sales from Evrysdi. Comparatively, in the year ended December 31, 2020, the FDA approved Evrysdi for the treatment of SMA in adults and children two months and older in August 2020. The first commercial sale of Evrysdi in the United States was made in August 2020. This event triggered a $20.0 million milestone payment to us from Roche. In August 2020, the EMA accepted the MAA filed by Roche for Evrysdi for the treatment of SMA, which triggered a $15.0 million milestone payment to us from Roche. In October 2020, Chugai filed an NDA in Japan for Evrysdi for the treatment of SMA, which triggered a $7.5 million milestone payment to us from Roche.

Royalty revenue. Royalty revenue was $54.6 million for the years ended December 31, 2021, an increase of $49.9 million, or over 100%, from $4.8 million for the years ended December 31, 2020. The increase in royalty revenue was due to the FDA approval of Evrysdi in August 2020. In accordance with the SMA License Agreement, we are entitled to royalties on worldwide annual net sales of the product.

Cost of product sales, excluding amortization of acquired intangible asset. Cost of product sales, excluding amortization of acquired intangible asset, was $32.3 million for the year end December 31, 2021, an increase of $13.4 million, or 71%, from $18.9 million for the year ended December 31, 2020. Cost of product sales consist primarily of royalty payments associated with Emflaza and Translarna net product sales, excluding contingent payments to Marathon,



                                      150

Table of Contents

costs associated with Emflaza and Translarna product sold during the period, and royalty expense related to royalty revenues and collaboration milestone revenues. The increase in cost of product sales, excluding amortization of acquired intangible asset, is primarily due to the increases in net product revenue, royalty revenues, and collaboration milestone revenue.

Amortization of acquired intangible asset. Amortization of acquired intangible asset was $54.8 million for the year ended December 31, 2021, an increase of $17.9 million, or 48%, from $36.9 million for the year ended December 31, 2020. These amounts are related to the acquisition of all rights to Emflaza acquired in May 2017, Marathon contingent payments, and our Waylivra and Tegsedi intangible assets. The increase is primarily related to additional Marathon contingent payments. The amount allocated to the Emflaza intangible asset is amortized on a straight-line basis over its estimated useful life of approximately seven years from the date of the completion of the acquisition of all rights to Emflaza, the period of estimated future cash flows. The Marathon contingent payments are amortized prospectively as incurred, straight-line, over the remaining useful life of the Emflaza intangible asset. The Waylivra and Tegsedi assets are amortized on a straight-line basis over their estimated useful life of approximately ten years, respectively. Additionally, in August 2021, we made a $4.0 million milestone payment to Akcea upon regulatory approval of Waylivra from ANVISA. In accordance with the guidance for an asset acquisition, we recorded the milestone payment when it became payable to Akcea, and it increased the cost basis for the Waylivra intangible asset. This payment is being amortized to cost of product sales over the expected remaining useful life of the Waylivra asset on a straight line basis.

Research and development expense. Research and development expense was $540.7 million for the year ended December 31, 2021, an increase of $63.0 million, or 13%, compared to $477.6 million for the year ended December 31, 2020. The increase in research and development expenses is primarily related to increased investment in research programs and advancement of the clinical pipeline. This increase was partially offset by one time charges in the year ended December 31, 2020 of $53.6 million for our Censa Merger, as well as $41.4 million for our commercial manufacturing service agreement with MassBio related to dedicated manufacturing space for our lead gene therapy program, AADC deficiency.

Selling, general and administrative expense. Selling, general and administrative expense was $285.8 million for the year ended December 31, 2021, an increase of $40.6 million, or 17%, from $245.2 million for the year ended December 31, 2020. The increase reflects our continued investment to support our commercial activities including our expanding commercial portfolio, including an increase in rent and related expenses associated with entering into a long term lease for the Hopewell Facility that commenced on July 1, 2020.

Change in the fair value of deferred and contingent consideration. Change in the fair value of deferred and contingent consideration was a gain of $0.5 million for the year ended December 31, 2021, a change of $23.8 million, or over 100%, from a loss of $23.3 million for the year ended December 31, 2020. The change is related to the fair valuation of the potential future consideration to be paid to former equityholders of Agilis as a result of our merger with Agilis which closed in August 2018. Changes in the fair value were due to the re-calculation of discounted cash flows for the passage of time and changes to certain other estimated assumptions.

Settlement of deferred and contingent consideration. Settlement of deferred and contingent consideration was $0.0 million for year ended December 31, 2021, a decrease of $10.6 million, or 100%, from $10.6 million for the year ended December 31, 2020. The settlement of deferred and contingent consideration for the year ended December 31, 2020 is related to a loss upon the settlement of the deferred and contingent consideration liabilities as a result of the Rights Exchange Agreement with certain former equityholders of Agilis, whereby we exchanged their pro rata share of specific future cash milestone payments in the aggregate amount of $225.0 million for a combination of cash and equity. We paid $36.9 million in cash and issued 2,821,176 shares of common stock in exchange for the cancellation and forfeiture of the Participating Rightholders' rights to receive (i) $174.0 million, in the aggregate, of potential milestone payments based on the achievement of certain regulatory milestones and (ii) $37.6 million, in the aggregate, of $40.0 million in development milestone payments that would have been due upon the passing of the second anniversary of the closing of the Agilis Merger, regardless of whether the milestones are achieved.

Interest expense, net. Interest expense, net was $86.0 million for the year ended December 31, 2021, an increase of $29.7 million, 53%, from interest expense, net of $56.4 million for the year ended December 31, 2020. The increase in interest expense, net was primarily due to interest expense recorded from the liability for the sale of future royalties related



                                      151

Table of Contents

to the Royalty Purchase Agreement, partially offset by a decrease in interest expense recorded from the 2022 and 2026 Convertible Notes as a result of the adoption of ASU 2020-06 and interest income from our investments.

Other (expense) income, net. Other expense, net was $57.9 million for the year ended December 31, 2021, a change of $143.1 million, over 100%, from other income, net of $85.2 million for the year ended December 31, 2020. The change in other (expense) income, net resulted primarily from an unrealized foreign exchange loss of $41.0 million from the remeasurement of our intercompany loan, which is recorded on a non-U.S. subsidiary and denominated in U.S. dollars, and unrealized losses on our equity investments and convertible debt security in ClearPoint Neuro, Inc. (formerly MRI Interventions, Inc.), or ClearPoint, of $6.1 million and $8.3 million, respectively.

Income tax expense. Income tax expense was $5.6 million for the year ended December 31, 2021, a decrease of $29.7 million, or 84%, from income tax expense of $35.2 million for the year ended December 31, 2020. We recorded a state income tax provision for the year ended December 31, 2020, which is attributable to the taxable income from the sale of our right to receive sales-based royalty payments on Roche's worldwide net sales of Evrysdi. We also incurred income tax expense in various foreign jurisdictions, and our foreign tax liabilities are largely dependent upon the distribution of pre-tax earnings among these different jurisdictions.

Year ended December 31, 2020 compared to year ended December 31, 2019

The following table summarizes revenues and selected expense and other income data for the years ended December 31, 2020 and 2019:



                                                          Year ended
                                                        December 31,               Change
(in thousands)                                        2020          2019        2020 vs. 2019
Net product revenue                                $  333,401    $  291,306    $        42,095
Collaboration revenue                                  42,579        15,674    $        26,905
Royalty revenue                                         4,786             -    $         4,786
Cost of product sales, excluding amortization
of acquired intangible assets                          18,942        12,135    $         6,807
Amortization of acquired intangible assets             36,892        27,650    $         9,242
Research and development expense                      477,643       257,452    $       220,191
Selling, general and administrative expense           245,164       202,541    $        42,623
Change in the fair value of deferred and
contingent consideration                               23,280        48,360    $      (25,080)
Settlement of deferred and contingent
consideration                                          10,613             -    $        10,613
Interest expense, net                                (56,352)      (12,491)    $      (43,861)
Other income, net                                      85,188        13,723    $        71,465
Income tax expense                                   (35,228)      (11,650)    $      (23,578)

Net product revenue. Net product revenue was $333.4 million for the year ended December 31, 2020, an increase of $42.1 million, or 14%, from net product revenue of $291.3 million for the year ended December 31, 2019. Translarna net product revenues were $191.9 million for the year ended December 31, 2020, an increase of $1.9 million, or 1%, compared to $190.0 million for the year ended December 31, 2019. The increase in Translarna net product revenues was driven by broader uptake due to new patients in existing geographies, geographic expansion, and label updates. Emflaza net product revenues were $139.0 million for the year ended December 31, 2020, an increase of $38.0 million, or 38%, compared to $101.0 million for the year ended December 31, 2019. The increase in Emflaza net product revenue was primarily due to increased new patient prescriptions and higher compliance. The remaining increase was due to an increase in net product sales of Tegsedi and the commercial launch of Waylivra in the year ended December 31, 2020.

Collaboration revenue. Collaboration revenue was $42.6 million for the year ended December 31, 2020, an increase of $26.9 million, over 100%, from collaboration revenue of $15.7 million for the year ended December 31, 2019. The increase is primarily related to three milestones that were triggered from Roche in the years ended December 31, 2020. In August 2020, the FDA approved Evrysdi for the treatment of SMA in adults and children two months and older. The first commercial sale of Evrysdi in the United States was made in August 2020. This event triggered a $20.0 million milestone



                                      152

Table of Contents

payment to us from Roche. In August 2020, the EMA accepted the MAA filed by Roche for Evrysdi for the treatment of SMA, which triggered a $15.0 million milestone payment to us from Roche. In October 2020, Chugai filed an NDA in Japan for Evrysdi for the treatment of SMA, which triggered a $7.5 million milestone payment to us from Roche. Comparatively, in the year ended December 31, 2019, a $15.0 million milestone was triggered upon the FDA's acceptance of the filing of the NDA for risdiplam for the treatment of SMA.

Royalty revenue. Royalty revenue was $4.8 million for the years ended December 31, 2020, an increase of $4.8 million, or 100%, from $0.0 million for the years ended December 31, 2019. The increase in royalty revenue was due to the FDA approval of Evrysdi in August 2020. In accordance with the SMA License Agreement, we are entitled to royalties on worldwide annual net sales of the product.

Cost of product sales, excluding amortization of acquired intangible asset.

Cost of product sales, excluding amortization of acquired intangible asset, was $18.9 million for the year end December 31, 2020, an increase of $6.8 million, or 56%, from $12.1 million for the year ended December 31, 2019. Cost of product sales consist primarily of royalty payments associated with Emflaza and Translarna net product sales, excluding contingent payments to Marathon, costs associated with Emflaza and Translarna product sold during the period, and royalty expense related to royalty revenues and collaboration milestone revenues. The increase in cost of product sales, excluding amortization of acquired intangible asset, is primarily due to the increases in net product revenue, royalty revenues, and collaboration milestone revenue.

Amortization of acquired intangible asset. Amortization of acquired intangible asset was $36.9 million for the year ended December 31, 2020, an increase of $9.2 million, or 33%, from $27.7 million for the year ended December 31, 2019. These amounts are related to the acquisition of all rights to Emflaza acquired in May 2017, Marathon contingent payments, and our Waylivra and Tegsedi intangible assets. The increase is primarily related to additional Marathon contingent payments. The amount allocated to the Emflaza intangible asset is amortized on a straight-line basis over its estimated useful life of approximately seven years from the date of the completion of the acquisition of all rights to Emflaza, the period of estimated future cash flows. The Marathon contingent payments are amortized prospectively as incurred, straight-line, over the remaining useful life of the Emflaza intangible asset. The Waylivra and Tegsedi assets are amortized on a straight-line basis over their estimated useful life of approximately ten years, respectively.

Research and development expense. Research and development expense was $477.6 million for the year ended December 31, 2020, an increase of $220.2 million, or 86%, compared to $257.5 million for the year ended December 31, 2019. The increase in research and development expenses reflects costs associated with advancing the gene therapy and Bio-e platforms, increased investment in research programs, and advancement of the clinical pipeline. The increase also includes one-time charges of $53.6 million in acquisition related and other expenses from our acquisition of Censa pursuant to the Censa Merger Agreement and $41.4 million related to our commercial manufacturing services agreement with or MassBio related to dedicated manufacturing space for our lead gene therapy program, AADC deficiency.

Selling, general and administrative expense. Selling, general and administrative expense was $245.2 million for the year ended December 31, 2020, an increase of $42.6 million, or 21%, from $202.5 million for the year ended December 31, 2019. The increase was primarily due to continued investment to support our commercial activities including our expanding commercial portfolio and rent and related expenses associated with entering into a long term lease for the Hopewell Facility that commenced on July 1, 2020.

Change in the fair value of deferred and contingent consideration. Change in the fair value of deferred and contingent consideration was a loss of $23.3 million for the year ended December 31, 2020, a decrease of $25.1 million, or 52%, from a loss of $48.4 million for the year ended December 31, 2019. The change is related to the fair valuation of the potential future consideration to be paid to former equityholders of Agilis as a result of our merger with Agilis which closed in August 2018. Changes in the fair value were due to the re-calculation of discounted cash flows for the passage of time and changes to certain other estimated assumptions.

Settlement of deferred and contingent consideration. Settlement of deferred and contingent consideration was $10.6 million for year ended December 31, 2020. The settlement of deferred and contingent consideration is related to a loss upon the settlement of the deferred and contingent consideration liabilities as a result of the Rights Exchange Agreement



                                      153

Table of Contents

with certain former equityholders of Agilis, whereby we exchanged their pro rata share of specific future cash milestone payments in the aggregate amount of $225.0 million for a combination of cash and equity. We paid $36.9 million in cash and issued 2,821,176 shares of common stock in exchange for the cancellation and forfeiture of the Participating Rightholders' rights to receive (i) $174.0 million, in the aggregate, of potential milestone payments based on the achievement of certain regulatory milestones and (ii) $37.6 million, in the aggregate, of $40.0 million in development milestone payments that would have been due upon the passing of the second anniversary of the closing of the Agilis Merger, regardless of whether the milestones are achieved.

Interest expense, net. Interest expense, net was $56.4 million for the year ended December 31, 2020, an increase of $43.9 million, over 100%, from interest expense, net of $12.5 million for the year ended December 31, 2019. The increase in interest expense, net was primarily due to interest expense recorded from the liability for the sale of future royalties related to the Royalty Purchase Agreement, interest expense recorded from the 2022 and 2026 Convertible Notes and the Credit Agreement, partially offset by interest income from our investments.

Other income, net. Other income, net was $85.2 million for the year ended December 31, 2020, an increase of $71.5 million, over 100%, from other income, net of $13.7 million for the year ended December 31, 2019. The increase in other income, net resulted primarily from an unrealized foreign exchange gain of $54.6 million from the remeasurement of our intercompany loan, which is recorded on a non-U.S. subsidiary and denominated in U.S. dollars, and unrealized gains on our equity investments and convertible debt security in ClearPoint of $14.3 million and $19.3 million, respectively. These gains were partially offset by Agilis Rights Exchange transaction fees of $2.0 million.

Income tax expense. Income tax expense was $35.2 million for the year ended December 31, 2020, an increase of $23.6 million, over 100%, from income tax expense of $11.7 million for the year ended December 31, 2019. We recorded a state income tax provision in the years ended December 31, 2020, which is attributable to the taxable income from the sale of our right to receive sales-based royalty payments on Roche's worldwide net sales of Evrysdi. We also incurred income tax expense in various foreign jurisdictions, and our foreign tax liabilities are largely dependent upon the distribution of pre-tax earnings among these different jurisdictions.

Liquidity and capital resources

Sources of liquidity

Since inception, we have incurred significant operating losses.

As a growing commercial-stage biopharmaceutical company, we are engaging in significant commercialization efforts for our products while also devoting a substantial portion of our efforts on research and development related to our products, product candidates and other programs. To date, almost all of our product revenue has been attributable to sales of Translarna for the treatment of nmDMD in territories outside of the United States and from Emflaza for the treatment of DMD in the United States. Our ongoing ability to generate revenue from sales of Translarna for the treatment of nmDMD is dependent upon our ability to maintain our marketing authorizations in Brazil, Russia and in the EEA and secure market access through commercial programs following the conclusion of pricing and reimbursement terms at sustainable levels in the member states of the EEA or through EAP programs in the EEA and other territories. The marketing authorization requires annual review and renewal by the European Commission following reassessment by the EMA of the benefit-risk balance of the authorization and is subject to the specific obligation to conduct Study 041. Our ability to generate product revenue from Emflaza will largely depend on the coverage and reimbursement levels set by governmental authorities, private health insurers and other third-party payors.

We have historically financed our operations primarily through the issuance and sale of our common stock in public offerings, our "at the market offering" of our common stock, proceeds from the Royalty Purchase Agreement, the private placements of our preferred stock, collaborations, bank and institutional lender debt, convertible debt financings and grants and clinical trial support from governmental and philanthropic organizations and patient advocacy groups in the disease areas addressed by our product candidates. We expect to continue to incur significant expenses and operating losses for at least the next fiscal year. The net losses we incur may fluctuate significantly from quarter to quarter.



                                      154

  Table of Contents

In August 2015, we closed a private offering of $150.0 million in aggregate principal amount of 2022 Convertible Notes, including the exercise by the initial purchasers of an option to purchase an additional $25.0 million in aggregate principal amount of the 2022 Convertible Notes. The 2022 Convertible Notes bear cash interest payable on February 15 and August 15 of each year, beginning on February 15, 2016. The 2022 Convertible Notes are senior unsecured obligations of ours and will mature on August 15, 2022, unless earlier converted, redeemed or repurchased in accordance with their terms prior to such date. We received net proceeds from the offering of approximately $145.4 million, after deducting the initial purchasers' discounts and commissions and the estimated offering expenses payable by us.

As of February 15, 2022, until the close of business on the business day immediately preceding the maturity date, holders may convert their 2022 Convertible Notes at any time. Upon conversion, we will pay or deliver, as the case may be, cash, shares of our common stock or any combination thereof at our election.

The conversion rate for the 2022 Convertible Notes was initially, and remains, 17.7487 shares of our common stock per $1,000 principal amount of the 2022 Convertible Notes, which is equivalent to an initial conversion price of approximately $56.34 per share of our common stock.

We were not permitted to redeem the 2022 Convertible Notes prior to August 20, 2018. As of August 20, 2018, we may redeem for cash all or any portion of the 2022 Convertible Notes, at our option, on or after August 20, 2018 if the last reported sale price of our common stock has been at least 130% of the conversion price then in effect on the last trading day of, and for at least 19 other trading days (whether or not consecutive) during, any 30 consecutive trading day period ending on, and including, the trading day immediately preceding the date on which we provide notice of redemption, at a redemption price equal to 100% of the principal amount of the 2022 Convertible Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund is provided for the 2022 Convertible Notes, which means that we are not required to redeem or retire the 2022 Convertible Notes periodically. There have been no redemptions to date.

If we undergo a "fundamental change" (as defined in the Indenture governing the 2022 Convertible Notes Indenture), subject to certain conditions, holders of the 2022 Convertible Notes may require us to repurchase for cash all or part of their 2022 Convertible Notes at a repurchase price equal to 100% of the principal amount of the 2022 Convertible Notes to be repurchased, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date.

The 2022 Convertible Notes represent senior unsecured obligations and will rank senior in right of payment to our future indebtedness that is expressly subordinated in right of payment to the notes, equal in right of payment to our existing and future unsecured indebtedness that is not so subordinated, effectively junior in right of payment to any of our secured indebtedness to the extent of the value of the assets securing such indebtedness, and structurally subordinated to all existing and future indebtedness and other liabilities (including trade payables) incurred by our subsidiaries. The 2022 Convertible Notes Indenture contains customary events of default with respect to the 2022 Convertible Notes, including that upon certain events of default (including our failure to make any payment of principal or interest on the 2022 Convertible Notes when due and payable) occurring and continuing, the 2022 Convertible Notes Trustee by notice to us, or the holders of at least 25% in principal amount of the outstanding 2022 Convertible Notes by notice to us and the 2022 Convertible Notes Trustee, may, and the 2022 Convertible Notes Trustee at the request of such holders (subject to the provisions of the 2022 Convertible Notes Indenture) will, declare 100% of the principal of and accrued and unpaid interest, if any, on all the 2022 Convertible Notes to be due and payable. In case of certain events of bankruptcy, insolvency or reorganization, involving us or a significant subsidiary, 100% of the principal of and accrued and unpaid interest on the 2022 Convertible Notes will automatically become due and payable. Upon such a declaration of acceleration, such principal and accrued and unpaid interest, if any, will be due and payable immediately.

In January 2019 and February 2019, we closed an underwritten public offering of 7,563,725 shares of our common stock and received net proceeds of approximately $224.2 million. In August 2019, we entered into the Sales Agreement, pursuant to which, we may offer and sell shares of our common stock, having an aggregate offering price of up to $125.0 million from time to time through the Sales Agents by any method that is deemed to be an "at the market offering" as defined in Rule 415(a)(4) promulgated under the Securities Act. In September 2019, we closed an underwritten public offering of 2,475,248 shares of our common stock and received net proceeds of $97.0 million. See "Item 7. Management's



                                      155

Table of Contents

Discussion and Analysis of Financial Condition and Results of Operations-Overview-Funding" for additional information regarding the transactions described in this paragraph.

In September 2019, we issued $287.5 million aggregate principal amount of 2026 Convertible Notes, which included an option to purchase up to an additional $37.5 million in aggregate principal amount of the 2026 Convertible Notes, which was exercised in full by the initial purchasers. The 2026 Convertible Notes bear cash interest at a rate of 1.50% per year, payable semi-annually on March 15 and September 15 of each year, beginning on March 15, 2020. The 2026 Convertible Notes will mature on September 15, 2026, unless earlier repurchased or converted. We received net proceeds of $279.3 million after deducting the initial purchasers' discounts and commissions and the offering expenses payable by us.

Holders may convert their 2026 Convertible Notes at their option at any time prior to the close of business on the business day immediately preceding March 15, 2026 only under the following circumstances: (1) during any calendar quarter commencing on or after December 31, 2019 (and only during such calendar quarter), if the last reported sale price of our common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any five consecutive trading day period, or the measurement period, in which the trading price (as defined in the 2026 Convertible Notes Indenture) per $1,000 principal amount of 2026 Convertible Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of our common stock and the conversion rate on each such trading day; (3) during any period after we have issued notice of redemption until the close of business on the scheduled trading day immediately preceding the relevant redemption date; or (4) upon the occurrence of specified corporate events. On or after March 15, 2026, until the close of business on the business day immediately preceding the maturity date, holders may convert their 2026 Convertible Notes at any time, regardless of the foregoing circumstances. Upon conversion, we will pay or deliver, as the case may be, cash, shares of our common stock or any combination thereof at our election.

The conversion rate for the 2026 Convertible Notes was initially, and remains, 19.0404 shares of our common stock per $1,000 principal amount of the 2026 Convertible Notes, which is equivalent to an initial conversion price of approximately $52.52 per share of our common stock. The conversion rate may be subject to adjustment in some events but will not be adjusted for any accrued and unpaid interest.

We are not permitted to redeem the 2026 Convertible Notes prior to September 20, 2023. We may redeem for cash all or any portion of the 2026 Convertible Notes, at our option, if the last reported sale price of its common stock has been at least 130% of the conversion price then in effect on the last trading day of, and for at least 19 other trading days (whether or not consecutive) during, any 30 consecutive trading day period ending on, and including, the trading day immediately preceding the date on which we provide notice of redemption, at a redemption price equal to 100% of the principal amount of the 2026 Convertible Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund is provided for the 2026 Convertible Notes, which means that we are not required to redeem or retire the 2026 Convertible Notes periodically.

If we undergo a "fundamental change" (as defined in the 2026 Convertible Notes Indenture), subject to certain conditions, holders of the 2026 Convertible Notes may require us to repurchase for cash all or part of their 2026 Convertible Notes at a repurchase price equal to 100% of the principal amount of the 2026 Convertible Notes to be repurchased, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date.

The 2026 Convertible Notes represent senior unsecured obligations and will rank senior in right of payment to our future indebtedness that is expressly subordinated in right of payment to the notes, equal in right of payment to our existing and future unsecured indebtedness that is not so subordinated, effectively junior in right of payment to any of our secured indebtedness to the extent of the value of the assets securing such indebtedness, and structurally subordinated to all existing and future indebtedness and other liabilities (including trade payables) incurred by our subsidiaries. The 2026 Convertible Notes Indenture contains customary events of default with respect to the 2026 Convertible Notes, including that upon certain events of default (including our failure to make any payment of principal or interest on the 2026 Convertible Notes when due and payable) occurring and continuing, the 2026 Convertible Notes Trustee by notice to us, or the holders



                                      156

Table of Contents

of at least 25% in principal amount of the outstanding 2026 Convertible Notes by notice to us and the Convertible Notes Trustee, may, and the 2026 Convertible Notes Trustee at the request of such holders (subject to the provisions of the 2026 Convertible Notes Indenture) will, declare 100% of the principal of and accrued and unpaid interest, if any, on all the 2026 Convertible Notes to be due and payable. In case of certain events of bankruptcy, insolvency or reorganization, involving us or a significant subsidiary, 100% of the principal of and accrued and unpaid interest on the 2026 Convertible Notes will automatically become due and payable. Upon such a declaration of acceleration, such principal and accrued and unpaid interest, if any, will be due and payable immediately.

In July 2020, we entered into the Royalty Purchase Agreement. Pursuant to the Royalty Purchase Agreement, we sold to RPI the Assigned Royalty Payment in consideration for $650.0 million. See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations-Overview-Funding" for additional information regarding this transaction.

Cash flows

As of December 31, 2021, we had cash and cash equivalents and marketable securities of $773.4 million.

The following table provides information regarding our cash flows and our capital expenditures for the periods indicated.



                                            Years ended
                                           December 31,
(in thousands)                  2021           2020           2019

Cash (used in) provided by: Operating activities $ (251,332) $ (194,071) $ (98,639) Investing activities $ 219,182 $ (561,548) $ (387,237) Financing activities $ 20,877 $ 668,715 $ 613,209

Net cash used in operating activities was $251.3 million, $194.1 million, and $98.6 million for the years ended December 31, 2021, 2020, and 2019, respectively. The cash used in operating activities primarily related to supporting clinical development, including the manufacture of drug product, commercial activities for Emflaza and Translarna, and costs associated with the expansion of our international infrastructure for the years ended December 31, 2021, 2020, and 2019.

Net cash provided by investing activities was $219.2 million for the year ended December 31, 2021. Net cash used in investing activities was $561.5 million and $387.2 million for the years ended December 31, 2020 and 2019, respectively. The cash provided by investing activities for the year ended December 31, 2021 was primarily related to net sales and redemptions of marketable securities. The cash used in investing activities for the year ended December 31, 2020 was primarily related to purchases of marketable securities, the acquisition of product rights, purchases of fixed assets, and our purchase of convertible debt security, partially offset by net sales and redemptions of marketable securities. The cash used in investing activities for the year ended December 31, 2019 was primarily related to purchases of marketable securities, the acquisition of product rights, purchases of fixed assets, and our Equity Investment, partially offset by net sales and redemptions of marketable securities.

Net cash provided by financing activities was $20.9 million, $668.7 million, and $613.2 million for the years ended December 31, 2021, 2020 and 2019, respectively. The cash provided by financing activities for the year ended December 31, 2021 is primarily attributable to the exercise of options, and issuance of stock under our Employee Stock Purchase Plan, or ESPP, offset by payments of finance lease principal. Net cash provided by financing activities for the year ended December 31, 2020 is primarily attributable to proceeds from the Royalty Purchase Agreement, net proceeds received from our "at the market offering" of our common stock, the exercise of options, and issuance of stock under our ESPP, partially offset by repayment on our senior secured term loan, payments on deferred consideration obligation, and payments of finance lease principal. Net cash provided by financing activities for the year ended December 31, 2019 is primarily attributable to net proceeds received from our public stock offerings, net proceeds received



                                      157

Table of Contents

from our "at the market offering" of our common stock, net proceeds received from our convertible notes offering, the exercise of options, and issuance of stock under our ESPP, partially offset by repayment on our senior secured term loan.

Funding requirements

We anticipate that our expenses will continue to increase in connection with our commercialization efforts in the United States, the EEA, Latin America and other territories, including the expansion of our infrastructure and corresponding sales and marketing, legal and regulatory, distribution and manufacturing and administrative and employee-based expenses. In addition to the foregoing, we expect to continue to incur significant costs in connection with the research and development of our splicing, gene therapy, Bio-e, metabolic and oncology programs and our studies of emvododstat for COVID-19 as well as studies in our products for maintaining authorizations, including Study 041, label extensions and additional indications. In addition, we may incur substantial costs in connection with our efforts to advance our regulatory submissions. We continue to seek marketing authorization for Translarna for the treatment of nmDMD in territories that we do not currently have marketing authorization in. We submitted an MAA to the EMA for the treatment of AADC deficiency with PTC-AADC in the EEA and we expect an opinion from the CHMP in April 2022. We are preparing a BLA for PTC-AADC for the treatment of AADC deficiency in the United States and we expect to submit a BLA to the FDA in the second quarter of 2022. We filed for marketing authorization for Waylivra with ANVISA for the treatment of FPL and we expect a regulatory decision on approval from ANVISA in the second half of 2022. These efforts may significantly impact the timing and extent of our commercialization expenses.

In addition, our expenses will increase if and as we:

? seek to satisfy contractual and regulatory obligations we assumed in connection

with the Agilis Merger;

? seek to satisfy contractual and regulatory obligations in conjunction with the

Tegsedi-Waylivra Agreement;

? satisfy contractual and regulatory obligations that we assumed through our

other acquisitions and collaborations;

? execute our commercialization strategy for our products and product candidates

that may receive marketing authorization;

are required to complete any additional clinical trials, non-clinical studies

? or Chemistry, Manufacturing and Controls, or CMC, assessments or analyses in

order to advance Translarna for the treatment of nmDMD in the United States or

elsewhere;

? utilize the Hopewell Facility to manufacture program materials for certain of

our gene therapy product candidates;

initiate or continue the research and development of our splicing, gene

? therapy, Bio-e, metabolic and oncology programs and our studies of emvododstat

for COVID-19 as well as studies in our products for maintaining authorizations,

including Study 041, label extensions and additional indications;

? seek to discover and develop additional product candidates;

? seek to expand and diversify our product pipeline through strategic

transactions;

? maintain, expand and protect our intellectual property portfolio; and

add operational, financial and management information systems and personnel,

? including personnel to support our product development and commercialization

efforts.

We believe that our cash flows from product sales, together with existing cash and cash equivalents, including our offerings of the Convertible Notes, public offerings of common stock, our "at the market offering" of our common stock, proceeds from the Royalty Purchase Agreement and marketable securities, will be sufficient to fund our operating expenses



                                      158

Table of Contents

and capital expenditure requirements for at least the next twelve months. We have based this estimate on assumptions that may prove to be wrong, and we could use our capital resources sooner than we currently expect.

Our future capital requirements will depend on many factors, including:

? our ability to commercialize and market our products and product candidates

that may receive marketing authorization;

our ability to negotiate, secure and maintain adequate pricing, coverage and

? reimbursement terms, on a timely basis, with third-party payors for our

products and products candidates;

our ability to maintain the marketing authorization for our products, including

in the EEA for Translarna for the treatment of nmDMD and whether the EMA

? determines on an annual basis that the benefit-risk balance of Translarna

supports renewal of our marketing authorization in the EEA, on the current

approved label;

? the costs, timing and outcome of Study 041;

the costs, timing and outcome of our efforts to advance Translarna for the

treatment of nmDMD in the United States, including, whether we will be required

? to perform additional clinical trials, non-clinical studies or CMC assessments

or analyses at significant cost which, if successful, may enable FDA review of

an NDA re-submission by us and, ultimately, may support approval of Translarna

for nmDMD in the United States;

? unexpected decreases in revenue or increase in expenses resulting from the

COVID-19 pandemic;

? our ability to maintain orphan exclusivity in the United States for Emflaza;

? our ability to successfully complete all post-marketing requirements imposed by

regulatory agencies with respect to our products;

the progress and results of activities under our splicing, gene therapy, Bio-e,

? metabolic and oncology programs and our studies of emvododstat for COVID-19 as

well as studies in our products for maintaining authorizations, label

extensions and additional indications;

the scope, costs and timing of our commercialization activities, including

product sales, marketing, legal, regulatory, distribution and manufacturing,

? for any of our products and for any of our other product candidates that may

receive marketing authorization or any additional territories in which we

receive authorization to market Translarna;

the costs, timing and outcome of regulatory review of our splicing, gene

? therapy, Bio-e, metabolic and oncology programs and our studies of emvododstat

for COVID-19 and Translarna in other territories;

? our ability to utilize the Hopewell Facility to manufacture program materials

for certain of our gene therapy product candidates;

? our ability to satisfy our obligations under the indentures governing the

Convertible Notes;

? the timing and scope of growth in our employee base;

the scope, progress, results and costs of preclinical development, laboratory

? testing and clinical trials for our other product candidates, including those

in our splicing, gene therapy, Bio-e, metabolic and oncology programs;

? revenue received from commercial sales of our products or any of our product

candidates;

our ability to obtain additional and maintain existing reimbursed named patient

? and cohort EAP programs for Translarna for the treatment of nmDMD on adequate

terms, or at all;

the ability and willingness of patients and healthcare professionals to access

? Translarna through alternative means if pricing and reimbursement negotiations

in the applicable territory do not have a positive outcome;

the costs of preparing, filing and prosecuting patent applications,

? maintaining, and protecting our intellectual property rights and defending

against intellectual property-related claims;

the extent to which we acquire or invest in other businesses, products, product

candidates, and technologies, including the success of any acquisition,

? in-licensing or other strategic transaction we may pursue, and the costs of

subsequent development requirements and commercialization efforts, including

with respect to our acquisitions of Emflaza, Agilis, our Bio-E platform and

Censa and our licensing of Tegsedi and Waylivra; and

our ability to establish and maintain collaborations, including our

? collaborations with Roche and the SMA Foundation, and our ability to obtain

research funding and achieve milestones under these agreements.

With respect to our outstanding 2022 Convertible Notes, cash interest payments are payable on a semi-annual basis in arrears, which require total funding of $4.5 million annually. The 2022 Convertible Notes will mature on August 15, 2022 and we will be required to pay any outstanding principal amount of the 2022 Convertible Notes at that time, unless



                                      159

Table of Contents

earlier converted, redeemed or repurchased in accordance with their terms prior to such date. As of February 15, 2022, until the close of business on the business day immediately preceding the maturity date, holders may convert their 2022 Convertible Notes at any time. Upon conversion, we will pay or deliver, as the case may be, cash, shares of our common stock or any combination thereof at our election. With respect to our outstanding 2026 Convertible Notes, cash interest payments are payable on a semi-annual basis in arrears, which will require total funding of $4.3 million annually.

In addition, we expect to pay Marathon Pharmaceuticals, LLC (now known as Complete Pharma Holdings, LLC), or Marathon, a single $50.0 million sales-based milestone in connection with Emflaza sales in 2022. We also expect to pay the former equityholders of Agilis an aggregate of $70.0 million upon the achievement of certain development and regulatory milestones in 2022 relating to PTC-AADC.

We also have certain significant contractual obligations and commercial commitments that require funding. We lease office space for our principal office in South Plainfield, New Jersey and we occupy under leases that expire in 2024, with two consecutive five-year renewal options to renew the leases after 2024 and at 4041 Hadley Road, South Plainfield New Jersey that we occupy under a lease that will expire in May 2022. Additionally, we entered into a lease agreement for approximately 103,000 square feet of laboratory and office space in Bridgewater, New Jersey. The rental term for such facility commenced on May 1, 2020 with an initial term of seven years and two consecutive five year renewal periods at our option. We also have significant lease obligations that stem from our lease of office, manufacturing, and laboratory space in Hopewell, New Jersey. The rental term for such facility commenced on July 1, 2020, with an initial term of fifteen years and two consecutive 10-year renewal periods at our option. In addition, we lease office space, vehicles and equipment in various other locations in the U.S. and other countries for our employees and operations. We have a total of $130.8 million in obligations that stem from our operating leases.

We have a total of $33.0 million in obligations that stem from a commercial manufacturing services agreement entered into with MassBio on June 19, 2020, for a term of 12.5 years. Pursuant to the terms of the agreement, MassBio agreed to provide us with four dedicated rooms for our PTC-AADC program.

Under an Exclusive License and Supply Agreement, or the Faes Agreement, with Faes Farma, S.A., or Faes, we are required to pay royalties as a percentage of or as a fixed payment with respect to net product sales by us allocable to the Emflaza oral suspension product. We are required to pay Faes an annual minimum royalty during the first seven calendar years with a fixed percentage royalty during the remainder of the Faes Agreement term. The minimum royalty based on the euro to U.S. dollar exchange rate as of December 31, 2021 is $3.4 million, with the last minimum royalty payment due in 2023.

Under various agreements, we will be required to pay royalties and milestone payments upon the successful development and commercialization of products, including the following agreements with The Wellcome Trust Limited, or Wellcome Trust, and the SMA Foundation.

We have entered into funding agreements with Wellcome Trust for the research and development of small molecule compounds in connection with our oncology platform and antibacterial program. As we have discontinued development under our antibacterial program, we do not expect that milestone and royalty payments from us to Wellcome Trust will apply under that agreement. Under our oncology platform funding agreement, to the extent that we develop and commercialize program intellectual property, excluding emvododstat, on a for-profit basis ourselves or in collaboration with a partner (provided we retain overall control of worldwide commercialization), we may become obligated to pay to Wellcome Trust development and regulatory milestone payments and single-digit royalties on sales of any research program product. Our obligation to pay such royalties would continue on a country-by-country basis until the longer of the expiration of the last patent in the program intellectual property in such country covering the research program product and the expiration of market exclusivity of such product in such country. We made the first development milestone payment of $0.8 million to Wellcome Trust under the oncology platform funding agreement during the second quarter of 2016. Additional development and regulatory milestone payments of up to an aggregate of $22.4 million may become payable by us under this agreement. For example, in the event a Phase 2 clinical study of a research program candidate, such as unesbulin, is commenced, a milestone payment of $2.5 million would become payable by us to Wellcome Trust upon the earlier to occur of the first dose administered to the last patient enrolled in the study or the termination of dosing of all patients in the study. We expect to initiate a registration-directed Phase 2/3 trial of unesbulin for the treatment of



                                      160

Table of Contents

LMS in the second quarter of 2022 and we expect to initiate a registration-directed Phase 2 trial of unesbulin for the treatment of DIPG in the third quarter of 2022.

We have also entered into a sponsored research agreement with the SMA Foundation in connection with our spinal muscular atrophy program. We may become obligated to pay the SMA Foundation single-digit royalties on worldwide net product sales of any collaboration product that we successfully develop and subsequently commercialize or, with respect to collaboration products we outlicense, including Evrysdi, a specified percentage of certain payments we receive from our licensee. We are not obligated to make such payments unless and until annual sales of a collaboration product exceed a designated threshold. Our obligation to make such payments would end upon our payment to the SMA Foundation of an aggregate of $52.5 million.

Additionally, we have employment agreements with certain employees which require the funding of a specific level of payments, if certain events, such as a change in control or termination without cause, occur. Furthermore, since we are a public company, we have incurred and expect to continue to incur additional costs associated with operating as such, including significant legal, accounting, investor relations and other expenses.

We have never been profitable and we will need to generate significant revenues to achieve and sustain profitability, and we may never do so. We may need to obtain substantial additional funding in connection with our continuing operations. Until such time, if ever, as we can generate substantial product revenues, we expect to finance our cash needs primarily through a combination of equity offerings, debt financings, collaborations, strategic alliances, grants and clinical trial support from governmental and philanthropic organizations and patient advocacy groups in the disease areas addressed by our product and product candidates and marketing, distribution or licensing arrangements. Adequate additional financing may not be available to us on acceptable terms, or at all. To the extent that we raise additional capital through the sale of equity or convertible debt securities, our shareholders ownership interest will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of our common stockholders. Debt financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends. If we raise additional funds through collaborations, strategic alliances or marketing, distribution or licensing arrangements with third parties, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or product candidates or to grant licenses on terms that may not be favorable to us.

If we are unable to raise additional funds through equity, debt or other financings when needed or on attractive terms, we may be required to delay, limit, reduce or terminate our product development or commercialization efforts or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.

© Edgar Online, source Glimpses