The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our unaudited interim condensed consolidated financial statements and related notes appearing elsewhere in this Quarterly Report on Form 10-Q and our audited consolidated financial statements and notes and Management's Discussion and Analysis of Financial Condition and Results of Operations, included in our Annual Report on Form 10-K for the year ended December 31, 2021 filed with the SEC on February 24, 2022. As discussed in the section titled "Special Note Regarding Forward-Looking Statements," the following discussion and analysis contains forward-looking statements that involve risks and uncertainties, as well as assumptions that, if they never materialize or prove incorrect, could cause our results to differ materially from those expressed or implied by such forward-looking statements. Factors that could cause or contribute to these differences include, but are not limited to, those identified below and those discussed in the section titled "Risk Factors" in Part II, Item 1A of this Quarterly Report on Form 10-Q and in our Annual Report on Form 10-K for the year ended December 31, 2021.

Business overview

We are a clinical-stage biopharmaceutical company dedicated to advancing targeted protein degradation science to develop a new generation of small-molecule medicines to transform how disease is treated. We leverage our proprietary technology platform, TORPEDO (Target ORiented ProtEin Degrader Optimizer), to efficiently design and optimize small-molecule medicines that harness the body's natural protein recycling system to rapidly degrade disease-causing protein, offering the potential to overcome drug resistance, drug undruggable targets and improve patient outcomes. We are advancing multiple targeted oncology programs to the clinic and expanding our research platform to deliver the next wave of medicines for difficult-to-treat diseases.

Our most advanced product candidate, CFT7455, is an orally bioavailable MonoDAC degrader of protein targets called IKZF1 and IKZF3, currently in clinical development for multiple myeloma, or MM, and non-Hodgkin lymphomas, or NHLs, including peripheral T-cell lymphoma, or PTCL, and mantle cell lymphoma, or MCL. We initiated a first-in-human Phase 1/2 clinical trial for this product candidate in June 2021 and presented clinical data from Cohort A at the American Association for Cancer Research Annual Meeting in April 2022. We continue to enroll patients in the ongoing clinical trial. In August 2021, the FDA granted orphan drug designation to CFT7455 for the treatment of multiple myeloma.

We are also developing CFT8634, an orally bioavailable BiDAC degrader candidate targeting a protein called BRD9, for synovial sarcoma and SMARCB1-deleted solid tumors. In December 2021, the FDA cleared the IND application for CFT8634, and we expect to dose the first patient in a first-in-human Phase 1/2 clinical trial of this product candidate in the first half of 2022. In March 2022, the FDA granted orphan drug designation to CFT8634 for the treatment of soft tissue sarcoma.

Further, we are developing CFT1946, an orally bioavailable BiDAC degrader candidate specifically targeting V600X mutant BRAF to treat melanoma, non-small cell lung cancer, or NSCLC, colorectal cancer and other solid malignancies that harbor this mutation. We expect to submit an IND for this product candidate and begin a first-in human Phase 1/2 clinical trial in BRAF V600X driven cancers including melanoma, NSCLC and colorectal cancer in the second half of 2022.

Additionally, we are developing CFT8919, an orally bioavailable, allosteric, mutant-selective BiDAC degrader of epidermal growth factor receptor, or EGFR, with an L858R mutation in NSCLC. We expect to complete IND-enabling activities for this product candidate by the end of 2022.

Beyond these initial product candidates, we are further diversifying our pipeline by developing new degraders against both clinically-validated and currently undruggable targets. We have engineered degrader candidates that have successfully achieved blood-brain barrier penetration in preclinical studies, which is a key step in developing medicines with the potential to treat brain metastases in oncology as well as in therapeutic areas such neurodegenerative diseases. We also believe there are many other therapeutic areas and indications where leveraging our TORPEDO platform to develop novel degrader candidates may be advantageous.

Financial operations overview

Revenues

To date, we have not generated any revenue from product sales and do not expect to generate any revenue from the sale of products for the foreseeable future. Our revenues to date have been generated through research collaboration and license agreements. We recognize revenue over the expected performance period under each agreement. We expect that our revenue for the next several years will be derived primarily from our current collaboration agreements and any additional collaborations that we may enter into in the future. To date, we have not received any royalties under any of our existing collaboration agreements.

Roche Collaboration and License Agreement

In March 2016, we entered into a license agreement, or the Original Roche Agreement, with F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc., or Roche, whereby Roche provided us with a non-refundable upfront payment of $15.0 million, which was creditable against our target initiation fees of either $1.0 million or $4.0 million, depending on the compound selected. Pursuant to the terms of the Original Roche Agreement, we collaborated on research activities to develop novel treatments in the field of targeted protein degradation using our degrader technology. Under the Original Roche Agreement, we were initially responsible for developing therapeutics that utilize degrader technology for up to ten target proteins. On a target-by-target basis, after successful completion of a



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defined preclinical development phase, Roche had an exclusive option to pursue a license from us for further clinical development and commercialization.

On December 22, 2018, we amended and restated the Original Roche Agreement, or the Roche Agreement. Under the Roche Agreement, we have a more active role in the manufacturing and commercialization of products related to the targets included in the collaboration, whereby if we elect to opt into certain co-development rights, we will receive an increased royalty rate on future product sales from commercializing products directed to the target. If we opt into certain co-detailing rights, we are entitled to reimbursement of certain commercialization costs. The target structure was revised to six potential targets, three of which had been nominated as of the execution of the Roche Agreement and represent continuations of the initial preclinical research and development efforts begun under the Original Roche Agreement, and three additional targets that were not nominated as of the date of execution of the Roche Agreement. At the time of entry into the Roche Agreement, Roche maintained its option rights to license and commercialize products related to these six targets.

In November 2020, we signed a further amendment to the Roche Agreement that created a mechanism through which we and Roche can mutually agree to terminate the Roche Agreement on a target-by-target basis by the entry into a Mutual Target Termination Agreement. Upon a termination of this nature, the Roche Agreement, as amended, provides that all rights in know-how and intellectual property in support of products that use inhibition as their mode of action, referred to as the Roche Field, will revert to Roche and all rights in know-how and intellectual property in support of products that use degradation as their mode of action, referred to as the C4T Field, will revert to us. Further, this amendment states that, following the entry into a Mutual Target Termination Agreement, Roche will have rights in and responsibility for any know-how and intellectual property generated as a result of the collaboration that fits within the Roche Field and we will have rights in and responsibility for any know-how and intellectual property generated as a result of the collaboration that fits within the C4T Field. In support of this allocation of rights, under the amendment, Roche provided us, and we provided Roche, with a perpetual, irrevocable, fully paid up, exclusive (even as to party granting the license), sublicensable (including in multiple tiers) license to the patents that are allocated to a party under the mutual target termination agreement and a perpetual, irrevocable fully paid up, non-exclusive, sublicensable (including in multiple tiers) license to the know-how that is allocable to a party under the Mutual Target Termination Agreement. Through the entry into this amendment, we and Roche mutually agreed to terminate the Roche Agreement as to the target EGFR and, in November 2021, we entered into a Mutual Target Termination Agreement with Roche through which we agreed to terminate the Roche Agreement as to the target BRAF. Following this mutual target termination decision, the number of targets on which the parties shall continue to collaborate has been reduced to four, with Roche maintaining its option rights to license and commercialize products directed to those four targets. As a result, Roche is now free to pursue the targets EGFR and BRAF in the Roche Field and we are free to pursue the targets EGFR and BRAF in the C4T Field. All rights in and responsibility for know-how and intellectual property related to EGFR and BRAF in the Roche Field reverted to the Roche parties and all rights in and responsibility for know-how and intellectual property related to EGFR and BRAF in the C4T Field reverted to us. Roche is in the process of assigning the relevant patents related to BRAF in the C4T Field to us.

Under the Roche Agreement, we received additional upfront consideration of $40.0 million from Roche. Roche will make annual research plan payments of $1.0 million for each active research plan. Finally, adjustments were made to the option exercise fees, whereby targets that have progressed through standard good laboratory practice, or GLP, toxicology studies at the time of exercise now have option exercise fees of $7.0 million to $12.0 million and those progressed through Phase 1 trials have option exercise fees of $20.0 million.

For certain targets, Roche is required to pay us fees of $2.0 million and $3.0 million upon the identification of a lead series and the commencement of GLP toxicology studies, respectively. For each target option exercised by Roche, we are eligible to receive up to $275 million in research, development and commercial milestone payments per target. Roche is also required to pay us up to $150 million per target in one-time sales-based payments if the target achieves certain levels of net sales. Roche is also required to pay us royalties, at percentages from the mid-single digits to the low double-digits, on a licensed product-by licensed product basis, on worldwide net product sales.

Biogen Collaboration Research and License Agreement

On December 28, 2018, we entered into a collaborative research and license agreement, or the Biogen Agreement, with Biogen MA, Inc., or Biogen, whereby we agreed to collaborate on research and development efforts for up to five targets to discover and develop potential new treatments for neurological conditions, such as Alzheimer's disease and Parkinson's disease. The Biogen Agreement also has an option for Biogen to nominate additional targets and extend the Biogen Agreement. In February 2020, we entered into an amendment to the Biogen Agreement that provided further clarity around Biogen's ownership of target binding moieties, which are portions of molecules, and any related intellectual property that are directed at or bind to collaboration targets. This amendment further provides that Biogen licenses to us rights to use these Biogen target binding moieties and any related intellectual property as needed in order to conduct the research and development activities contemplated under the Biogen Agreement.

We granted Biogen a non-exclusive research license under our intellectual property to perform research activities, select and optimize degraders and develop products including the degraders, as well as a commercial license to manufacture and commercialize the products related to the targets once the initial research and development work is complete. The research under the Biogen Agreement will take place over a 54-month research term, ending in June 2023, with Biogen having an option to extend the Biogen Agreement for



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up to four additional years. If Biogen elects to extend the term of the Biogen Agreement, Biogen would be required to make an additional payment of $62.5 million and would be entitled to nominate up to five additional targets.

The Biogen Agreement provides for three initial targets, with Biogen having the right to initiate up to an additional two targets and to control all post-discovery activities. Biogen paid us a nonrefundable upfront payment of $45.0 million for access to our technology and research services through the discovery research phase. The nonrefundable upfront cash payment of $45.0 million is not creditable against any of the target development milestone fees.

Following the achievement of development candidate criteria, prior to any IND-enabling study, for any target, Biogen will bear all costs and expenses of and will have sole discretion and decision-making authority with respect to the performance of further activities with respect to any degrader under development under the Biogen Agreement and all products that incorporate that degrader. Biogen is also required to pay us up to $35.0 million per target in development milestones and $26.0 million per target in one-time sales-based payments for the first product to achieve certain levels of net sales. In addition, Biogen is required to pay us royalties on a licensed product-by-licensed product basis, on worldwide net product sales, at percentages in the mid-single digits. All milestone and sales-based payments are made after we have met the defined criteria in the joint research plan for that target, at which time Biogen will have control of the products related to the targets for commercialization; the receipt of these payments is contingent on the further development of products directed to the targets to commercialization by Biogen, without any additional research and development efforts from us.

Biogen also had the option to fund additional discovery activities, referred to as sandbox activities, whereby we performed discovery-type research at Biogen's election to develop other potential targets that may be used as replacement targets for the initially nominated targets or two additional targets under the Biogen Agreement. Sandbox activities fully concluded on August 31, 2021. Revenues earned under this option, were recognized as services were performed and were not included in the transaction price at the outset of the arrangement. These research activities were reimbursed on a full-time equivalent, or FTE, basis at specified market rates. These additional discovery activities were purchased up to a maximum amount by Biogen on an à la carte basis at an amount consistent with standalone selling price. If Biogen exercised these options, we recognized revenue as those options were exercised.

Calico License Agreement

In March 2017, we entered into Collaboration and License Agreement, or the Calico Agreement, with Calico Life Sciences LLC, or Calico, whereby we agreed to collaborate to develop and commercialize a set number of targets for small molecule protein degraders for diseases of aging, including cancer, for a five-year period ending in March 2022. In August 2021, we provided Calico with an option to extend the research term with respect to a certain program for up to a one-year period ending in March 2023, such period referred to as the research term. In September 2021, Calico elected to exercise the option for a one-year extension of the research term for this specified program.

We provided Calico with a non-exclusive research license under our intellectual property to perform research activities and select and optimize degraders and develop products including the degraders. We also granted Calico a commercial license for any licensed products resulting from the development candidates supplied by us. We are required to perform research and development activities for the nominated targets over the applicable research term, with the intent to provide a development candidate for each target to Calico once the agreed-upon research is complete.

Calico is obligated to reimburse our research and development activities for each target at specified levels through the identification of a development candidate, after which Calico shall assume full responsibility for candidate development.

After the initiation of each target, the Calico Agreement does not contain any options for Calico to license the individual targets; once we complete the initial research and development activities required, Calico controls and directs the targets with no additional work required to be performed by us. There is no exercise price or incremental fee payable to us to progress the research further, though Calico is required to pay an initiation fee with the commencement of each research plan. Once Calico nominates a target and pays the applicable target initiation fee, we will commence research and development activities for that target. The Calico Agreement provides for up to five initial targets. Research activities performed are reimbursed at specified levels for the five-year term of the Calico Agreement, with the term for one research program having been extended by an additional year.

Under this agreement, Calico paid us a nonrefundable upfront amount of $5.0 million and certain annual payments of $5.0 million through December 31, 2020. Upon our completion of the required discovery research and development services on any target, Calico is entitled to pursue development of that target to commercialized product. For each target, we are eligible to receive potential research, development and commercial milestone payments aggregating up to $132.0 million. Calico is also required to pay one-time sales-based payments aggregating up to $65.0 million for the first product to achieve certain levels of net sales. In addition, Calico is required to pay us royalties, on a licensed product-by-licensed product basis, on worldwide net product sales, at percentages in the mid-single digits. All milestone and sales-based payments are made after we have met the defined criteria in the joint research plan for that target, at which time Calico will have control of the products related to targets for commercialization; the receipt of these payments by us is contingent on the further development of the targets to commercialized products by Calico, without any additional research and development efforts required by us.



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Research and development expenses

Research and development expenses consist primarily of costs incurred for our research activities, including our discovery efforts, and the development of our product candidates, and include:



   •  salaries, benefits, and other related costs, including stock-based
      compensation expense, for personnel engaged in research and development
      functions;


   •  expenses incurred under agreements with third parties, including contract
      research organizations and other third parties that conduct research,
      preclinical, and clinical activities on our behalf as well as third parties
      that manufacture our product candidates for use in our preclinical and
      clinical trials;


   •  costs of outside consultants, including their fees, unit-based compensation,
      and related travel expenses;


   •  costs of laboratory supplies and acquiring materials for preclinical studies
      and clinical trials;


   •  facility-related expenses, which include direct depreciation costs of
      equipment and allocated expenses for rent and maintenance of facilities and
      other operating costs; and


  • third-party licensing fees.

We expense research and development costs as incurred. Costs for external development activities are recognized based on an evaluation of the progress to completion of specific tasks using information provided to us by our vendors. Payments for these activities are based on the terms of the individual agreements, which may differ from the pattern of costs incurred, and are reflected in our condensed consolidated financial statements as prepaid or accrued research and development expenses. Nonrefundable advance payments for goods or services to be received in the future for use in research and development activities are recorded as prepaid expenses and expensed as the related goods are delivered or the services are performed.

We expect that our research and development expenses will continue to increase substantially in connection with our planned preclinical and clinical development activities.

General and administrative expenses

General and administrative expenses consist primarily of salaries and other related costs, including stock-based compensation, for personnel in our executive, finance, legal, business development and administrative functions. General and administrative expenses also include legal fees relating to intellectual property and corporate matters; professional fees for accounting, auditing, tax and consulting services; insurance costs; travel expenses; and facility-related expenses, which include direct depreciation costs and allocated expenses for rent and maintenance of facilities and other operating costs.

We expect that our general and administrative expenses will continue to increase in the future to support increased research and development activities. These increases will likely include increased costs related to the hiring of additional personnel; fees to outside consultants, lawyers and accountants; director and officer insurance costs, among other expenses. and investor and public relations costs.

Other (expense) income, net

Other (expense) income, net primarily consists of the following:



   •  interest expense and amortization of our long-term debt, which is discussed
      in greater detail in Note 9, Long-term debt and warrant - related party, to
      the unaudited condensed consolidated financial statements in this Quarterly
      Report on Form 10-Q; and


   •  interest income earned on our cash, cash equivalents, and marketable
      securities and accretion of discount on marketable securities.


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Results of operations

Comparison of the three months ended March 31, 2022 and 2021

Revenue

Revenue from our collaboration and license agreements consisted of the following for the three months ended March 31, 2022 and 2021 (in thousands):



                                                Three Months Ended March 31,
                                                  2022                2021
Revenue from collaboration agreements:
Roche Agreement                               $       1,123       $       2,193
Biogen Agreement                                      4,716               1,880
Calico Agreement                                      1,815               3,353

Total revenue from collaboration agreements $ 7,654 $ 7,426

The $0.2 million increase in revenue in the three months ended March 31, 2022 as compared to the three months ended March 31, 2021 is primarily driven by:



   •  a $2.8 million increase in revenue recognized under the Biogen Agreement,
      resulting from increased effort made on the nominated targets and additional
      revenue recognized from the Biogen milestone earned in 2021.

This was offset by:



   •  a $1.5 million decrease in FTE reimbursements recognized under the Calico
      Agreement as a result of the extension of the research term under the Calico
      Agreement with respect to a specified program in September 2021; and


   •  a $1.1 million decrease in revenue recognized under the Roche Agreement,
      resulting from the termination of the Roche Agreement as to the target BRAF
      in November 2021.

Research and development expense

The following table summarizes our research and development expense for the three months ended March 31, 2022 and 2021 (in thousands):



                                             Three Months Ended March 31,
                                               2022                 2021
Research and development expenses:
Personnel expenses                        $       10,911       $        6,934
Preclinical and development expenses              10,195                9,389
Facilities and supplies                            2,273                2,297
Professional fees                                  1,655                1,171
Clinical expenses                                    809                  218
Intellectual property                                270                  423
Other expenses                                        90                   94

Total research and development expenses $ 26,203 $ 20,526

The $5.7 million increase in research and development expense in the three months ended March 31, 2022 as compared to the three months ended March 31, 2021 is primarily driven by:



   •  a $4.0 million increase in personnel expenses, representing salary and
      benefit costs, including a $2.4 million increase in stock-based compensation
      expense driven primarily by the equity awards issued to employees subsequent
      to March 31, 2021, and due to the buildout of our clinical development team.

General and administrative expense

The following table summarizes our general and administrative expense for the three months ended March 31, 2022 and 2021 (in thousands):



                                               Three Months Ended March 31,
                                                 2022                 2021
General and administrative expenses:
Personnel expenses                          $         8,548       $       4,640
Professional fees                                     2,227               2,431
Facilities and other expenses                         2,045                 338

Total general and administrative expenses $ 12,820 $ 7,409




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The $5.4 million increase in general and administrative expense in the three months ended March 31, 2022 as compared to the three months ended March 31, 2021 is primarily driven by:



   •  a $3.9 million increase in personnel expenses resulting from a $2.6 million
      increase in stock-based compensation expenses driven primarily by the equity
      awards issued to employees subsequent to March 31, 2021; and


   •  a $1.6 million increase in facilities and other expenses, which is driven
      primarily by lease commencement in January 2022 of our additional leased
      space.


Other (expense) income, net

The following table summarizes our other (expense) income for the three months ended March 31, 2022 and 2021 (in thousands):



                                                           Three Months Ended March 31,
                                                            2022                   2021

Other (expense) income, net: Interest expense and amortization of long-term debt - related party

                                        $         (527 )       $         (534 )
Interest and other income, net                                    276                     72
Total other (expense) income, net                      $         (251 )       $         (462 )


Liquidity and capital resources

Sources of liquidity

Since inception, we have incurred significant operating losses. We expect to incur significant expenses and operating losses for the foreseeable future as we advance the preclinical and, if successful, the clinical development of our programs. We do not currently have any approved products and have never generated any revenue from product sales. To date, we have financed our operations primarily through the sale of preferred stock, public offerings of our common stock, and through payments from collaboration partners. As of March 31, 2022, we had cash, cash equivalents and marketable securities of approximately $421.7 million.

Cash flows

The following table summarizes our sources and uses of cash for the periods presented (in thousands):



                                                          Three Months Ended March 31,
                                                            2022                 2021

Net change in cash, cash equivalents and restricted cash: Net cash used in operating activities

$      (26,596 )     $      (24,934 )
Net cash used in investing activities                          (4,004 )            (61,730 )
Net cash provided by (used in) financing activities               480                 (151 )
Total net change in cash, cash equivalents and
restricted cash                                        $      (30,120 )     $      (86,815 )


Operating activities

Net cash used in operating activities for the three months ended March 31, 2022 was driven primarily by the following uses of cash:



  • our net loss of $31.6 million;


   •  a $5.9 million change in deferred revenue due to the recognition of revenue
      under our collaboration agreements; and


  • a $4.9 million change in accounts payable and accrued expenses.

These were offset by non-cash expenses of $11.3 million, which primarily consisted of stock-based compensation expense of $8.9 million, and a $3.9 million change in accounts receivable.

Net cash used in operating activities for the three months ended March 31, 2021 was driven primarily by the following uses of cash:



  • our net loss of $21.0 million;


  • a $5.6 million change in accounts payable and accrued expenses; and


   •  a $3.8 million change in deferred revenue due to the recognition of revenue
      under our collaboration agreements.


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These were offset by non-cash expenses of $4.9 million, which primarily consisted of stock-based compensation expense of $3.8 million.

Investing activities

Net cash used in investing activities for the three months ended March 31, 2022 was primarily attributable to $3.8 million of purchases of marketable securities, net of maturities.

Net cash used in investing activities for the three months ended March 31, 2021 was primarily attributable to $61.3 million of purchases of marketable securities, net of maturities.

Funding requirements

Since our inception, we have incurred significant operating losses and we expect to continue to incur significant expenses and increasing operating losses for the foreseeable future as we advance the preclinical and clinical development of our product candidates. In addition, we expect to continue to incur costs associated with operating as a public company.

Specifically, we anticipate that our expenses will increase substantially in the future, if and as we:



   •  continue our ongoing first-in-human Phase 1/2 trial and initiate and conduct
      planned first-in-human Phase 1/2 trials for our other lead product
      candidates;


   •  advance additional product candidates into preclinical and clinical
      development;


  • continue to invest in our proprietary TORPEDO platform;


  • advance, expand, maintain and protect our intellectual property portfolio;


  • hire additional clinical, regulatory, quality and scientific personnel;


   •  add operational, financial and management information systems and personnel
      to support our ongoing research, product development, potential future
      commercialization efforts, operations as a public company and general and
      administrative roles;


   •  seek marketing approvals for any product candidates that successfully
      complete clinical trials; and


   •  ultimately establish a sales, marketing and distribution infrastructure and
      scale up external manufacturing capabilities to commercialize any products
      for which we may obtain marketing approval.

Because of the numerous risks and uncertainties associated with development and commercialization of our product candidates, we are unable to estimate the amounts of increased capital and operating costs associated with our current and anticipated preclinical and clinical development. Our future capital requirements will depend on many factors, including:



   •  the progress, costs and results of ongoing and planned first-in-human Phase
      1/2 trials for our lead product candidates and any future clinical
      development of those lead product candidates;


   •  the scope, progress, costs and results of preclinical and clinical
      development for our other product candidates and development programs;


   •  the number and development requirements of other product candidates that we
      pursue;


   •  the progress and success of our collaborations with Roche, Biogen and
      Calico, including whether or not we receive additional research support or
      milestone payments from our collaboration partners upon the achievement of
      milestones;


  • the costs, timing and outcome of regulatory review of our product candidates;


   •  the costs and timing of preparing, filing and prosecuting patent
      applications, maintaining and enforcing our intellectual property rights and
      defending any intellectual property-related claims;


   •  our willingness and ability to establish additional collaboration
      arrangements with other biotechnology or pharmaceutical companies on
      favorable terms, if at all, for the development or commercialization of
      current or additional future product candidates;


   •  the costs and timing of future commercialization activities, including
      product manufacturing, marketing, sales and distribution, for any of our
      product candidates for which we receive marketing approval; and


   •  the revenue, if any, received from commercial sales of our product
      candidates for which we receive marketing approval.

As a result of the anticipated expenditures described above, we will need to obtain substantial additional financing to support our continuing operations and pursue our long-term business plan. Until such time, if ever, that we can generate substantial revenue from product sales, we expect to finance our cash needs through a combination of equity offerings, debt offerings, collaborations, strategic



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alliances and marketing, distribution or licensing arrangements. Although we may receive potential future milestone and royalty payments under our collaborations with Roche, Biogen and Calico, we do not have any committed external source of funds as of March 31, 2022. Adequate additional funds 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 may be required to delay, limit, reduce or terminate our research, product development or future commercialization efforts or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.

If we raise additional capital through the sale of equity securities, each investor's ownership interest will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect your rights as a common stockholder. Preferred equity financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as making acquisitions or 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 grant licenses on terms that may not be favorable to us.

Contractual obligations

We enter into contracts in the normal course of business with contract manufacturing organizations, contract research organizations and other vendors to assist in the performance of our research and development activities and other services and products for operating purposes. These contracts generally provide for termination on notice, and therefore are cancelable contracts and not included in the table of contractual obligations and commitments.

During the three months ended March 31, 2022, except for the minimum rental commitments disclosed in Note 6, Leases, and Note 9, Long-term debt and warrant - related party, to the unaudited condensed consolidated financial statements in this Quarterly Report on Form 10-Q, there were no significant changes to our contractual obligations and commitments described under Management's Discussion and Analysis of Financial Condition and Results of Operations in our Annual Report on Form 10-K for the year ended December 31, 2021.

Critical accounting policies and use of estimates

Our critical accounting policies are those policies that require the most significant judgments and estimates in the preparation of our unaudited condensed consolidated financial statements. We have determined that our most critical accounting policies are those relating to revenue recognition from collaborations, research and development expense recognition, lease liability measurement, and stock-based compensation. There have been no significant changes to our existing critical accounting policies discussed in our Annual Report on Form 10-K for the year ended December 31, 2021 filed with the SEC on February 24, 2022.

Off-balance sheet arrangements

We have not entered into any off-balance sheet arrangements, as defined under the applicable regulations of the SEC.

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