In this Report on Form 10-Q, unless the context requires otherwise, "Ionis," "Company," "we," "our," and "us," means Ionis Pharmaceuticals, Inc. and its wholly owned subsidiary, Akcea Therapeutics, Inc.

Forward-Looking Statements



In addition to historical information contained in this Report on Form 10-Q, the
Report includes forward-looking statements regarding our business and the
therapeutic and commercial potential of SPINRAZA (nusinersen), TEGSEDI
(inotersen), WAYLIVRA (volanesorsen), eplontersen, olezarsen, donidalorsen,
ION363, pelacarsen, tofersen and our technologies and products in development.
Any statement describing our goals, expectations, financial or other
projections, intentions or beliefs, is a forward-looking statement and should be
considered an at-risk statement. Such statements are subject to certain risks
and uncertainties, including those related to the impact COVID-19 could have on
our business, and including those inherent in the process of discovering,
developing and commercializing medicines that are safe and effective for use as
human therapeutics, and in the endeavor of building a business around such
medicines. Our forward-looking statements also involve assumptions that, if they
never materialize or prove correct, could cause our results to differ materially
from those expressed or implied by such forward-looking statements. Factors that
could cause or contribute to such differences include, but are not limited to,
those discussed in this report and described in additional detail in our annual
report on Form 10-K for the year ended December 31, 2021, which is on file with
the U.S. Securities and Exchange Commission and is available from us, and those
identified within Part II Item 1A. Risk Factors of this Report. Although our
forward-looking statements reflect the good faith judgment of our management,
these statements are based only on facts and factors currently known by us. As a
result, you are cautioned not to rely on these forward-looking statements.

Overview



We are a leader in RNA-targeted therapeutics. We believe our medicines have the
potential to pioneer new markets, change standards of care and transform the
lives of people with devastating diseases. We currently have three marketed
medicines- SPINRAZA, TEGSEDI and WAYLIVRA. We also have a rich late- and
mid-stage pipeline primarily focused on our leading cardiovascular and neurology
franchises. We currently have six medicines in Phase 3 development for eight
indications. Recently, we reported positive Phase 3 interim analysis data from
the NEURO-TTRansform study of eplontersen in patients with polyneuropathy caused
by hereditary transthyretin amyloidosis, or ATTRv-PN. As a result, we plan to
file a New Drug Application, or NDA, with the U.S. Food and Drug Administration,
or FDA, by the end of 2022. Additionally, the FDA recently accepted Biogen's NDA
filing of tofersen for the treatment of superoxide dismutase 1 amyotrophic
lateral sclerosis, or SOD1-ALS, and granted tofersen priority review. Tofersen's
Prescription Drug User Fee Act, or PDUFA, date is April 25, 2023. These
achievements put us on track to potentially add two new marketed products to our
commercial portfolio, if these medicines are approved. In addition, based on
recent positive data from the Phase 2b study of bepirovirsen in patients with
chronic hepatitis B virus, or HBV, and the Phase 2 study of IONIS-FB-LRx in
patients with immunoglobulin A nephropathy, or IgAN, our partners plan to
advance these medicines into Phase 3 development, which would expand our
late-stage pipeline to eight medicines in Phase 3 development for ten
indications.

Our multiple sources of revenue and strong balance sheet enable us to invest in
our strategic priorities to build our commercial pipeline, expand and diversify
our technology and deliver new medicines to the market. By continuing to focus
on these priorities, we believe we are well positioned to drive future growth
and to deliver increasing value for patients and shareholders.

Marketed Medicines



SPINRAZA is the global market leader for the treatment of patients of all ages
with spinal muscular atrophy, or SMA, a progressive, debilitating and often
fatal genetic disease. Biogen is our partner responsible for commercializing
SPINRAZA worldwide. From inception through September 30, 2022, we have earned
more than $1.8 billion in revenues from our SPINRAZA collaboration, including
more than $1.3 billion in royalties on sales of SPINRAZA.

TEGSEDI is a once weekly, self-administered subcutaneous medicine approved in
the U.S., Europe, Canada and Brazil for the treatment of patients with
polyneuropathy caused by ATTRv-PN. In 2021, we began selling TEGSEDI in Europe
through our distribution agreement with Swedish Orphan Biovitrum AB, or Sobi.
Additionally, in the second quarter of 2021, Sobi began distributing TEGSEDI in
the U.S. and Canada. In Latin America, PTC Therapeutics International Limited,
or PTC, is commercializing TEGSEDI beginning with Brazil.

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WAYLIVRA is a once weekly, self-administered, subcutaneous medicine indicated as
an adjunct to diet in adult patients with genetically confirmed familial
chylomicronemia syndrome, or FCS, and at high risk for pancreatitis. In 2021, we
began selling WAYLIVRA in Europe through our distribution agreement with Sobi.
Under our exclusive license agreement with PTC, PTC is working to provide access
to WAYLIVRA across Latin America, beginning in Brazil. In the third quarter of
2021, the National Health Surveillance Agency (Agência Nacional de Vigilância
Sanitária), or ANVISA, approved WAYLIVRA in Brazil. In December 2021, PTC
submitted an application to ANVISA for approval of WAYLIVRA for the treatment of
familial partial lipodystrophy, or FPL, in Brazil. If approved, Waylivra will be
the first approved treatment for patients with FPL in Brazil.

Under our distribution agreements with Sobi, we retained the marketing
authorizations for TEGSEDI and WAYLIVRA in major markets. We continue to supply
commercial product to Sobi and manage regulatory and manufacturing processes, as
well as relationships with key opinion leaders. We also continue to lead the
TEGSEDI and WAYLIVRA global commercial strategy. In connection with the
agreements, we restructured our European operations in the first quarter of
2021, and we restructured our North American TEGSEDI operations in the second
quarter of 2021.

Medicines in Phase 3 Studies

We currently have six medicines in Phase 3 studies for eight indications, which include:

? Eplontersen: our medicine in development for transthyretin amyloidosis, or ATTR

o We are currently conducting the Phase 3 NEURO-TTransform study in patients with

ATTRv-PN, the Phase 3 CARDIO-TTransform study in patients with ATTR

cardiomyopathy, or ATTR-CM, and additional studies supporting our ATTR

development program

? In September 2022, we presented positive results from an interim analysis of

the Phase 3 NEURO-TTRansform study of eplontersen in patients with ATTRv-PN at

the International Symposium on Amyloidosis

? In the fourth quarter of 2022, we expanded enrollment in the Phase 3

CARDIO-TTRansform study of eplontersen in patients with ATTR cardiomyopathy, or

ATTR-CM

? Eplontersen was granted orphan drug designation by the FDA for the treatment of

patients with ATTR

? Tofersen: our medicine in development for SOD1-ALS

o Biogen is developing tofersen for the treatment of SOD-1 ALS, including

conducting the ongoing Phase 3 VALOR open label extension, or OLE, study in

patients with SOD1-ALS and the ongoing Phase 3 ATLAS study in presymptomatic

SOD-1 patients

? Tofersen is currently under priority review with the FDA and has a PDUFA action

date of April 25, 2023

? In June 2022, Biogen presented new data from the ongoing VALOR OLE study at the

European Network to Cure ALS meeting. These data were included in the NDA

filing

? Olezarsen: our medicine in development for FCS and severe hypertriglyceridemia,

or SHTG

o We are currently conducting a broad development program for olezarsen that

includes the BALANCE study in patients with FCS and three Phase 3 studies

supporting development for the treatment of SHTG, CORE, CORE2 and ESSENCE

? In July 2022, we achieved full enrollment in the BALANCE Phase 3 study in

patients with FCS supporting data readout mid-year 2023

? In the third quarter of 2022, we initiated CORE2, a confirmatory Phase 3 study

of olezarsen in patients with SHTG

? In the fourth quarter of 2022, we initiated ESSENCE, a supporting Phase 3 study

of olezarsen in patients with SHTG or hypertriglyceridemia and atherosclerotic

cardiovascular disease

? Pelacarsen: our medicine in development for lipoprotein(a), or Lp(a), driven

cardiovascular disease

o Novartis is developing pelacarsen, including conducting the ongoing Lp(a)

HORIZON Phase 3 cardiovascular outcome study in patients with established

cardiovascular disease and elevated Lp(a)

? In July 2022, Novartis achieved full enrollment in the Lp(a) HORIZON Phase 3

cardiovascular outcome study

? Donidalorsen: our medicine in development for hereditary angioedema, or HAE

o We are currently conducting the OASIS study in patients with HAE and OASIS Plus

supportive study for HAE patients previously treated with other prophylactic

therapies

? We plan to present new efficacy and safety results from the Phase 2 OLE study

of donidalorsen in HAE patients treated for one year at the American College of

Allergy, Asthma and Immunology Annual Scientific Meeting in November 2022

? ION363: our medicine in development for amyotrophic lateral sclerosis, or ALS,

with mutations in the fused in sarcoma gene, or FUS. FUS-ALS is the most common

cause of juvenile-onset ALS

o We are currently conducting a Phase 3 study of ION363 in juvenile and adult

patients with FUS-ALS and enrollment is ongoing


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Third Quarter 2022 and Recent Updates on Certain Mid-Stage Pipeline Medicines

? GSK presented positive end of study data from the Phase 2b B-Clear study of

bepirovirsen demonstrating potential for functional cures in patients with

chronic hepatitis B; GSK plans to advance bepirovirsen into Phase 3 development

in the first half of 2023

? We presented positive data from the Phase 2 study of IONIS-FB-LRx in patients

with IgAN; Roche plans to advance IONIS-FB-LRx into Phase 3 development in the

first half of 2023

? Bayer presented positive data from the Phase 2b study of fesomersen in patients

with end-stage renal disease; we regained rights to fesomersen from Bayer and

are assessing next steps

? Roche presented the Phase 2 GENERATION HD2 study design of tominersen in

Huntington's disease, or HD, patients; Roche plans to begin enrollment in early

2023

? We reported ION449 (AZD8233) targeting PCSK9 met the primary endpoint in Phase

2b SOLANO study in patients with hypercholesterolemia; based on pre-specified

efficacy criteria, AstraZeneca is not advancing ION449

COVID-19



As a company focused on improving the health of people around the world, our
priority during the COVID-19 pandemic is the safety of our employees, their
families, the healthcare workers who work with us and the patients who rely on
our medicines. We are also focused on maintaining the quality of our studies and
minimizing the impact to timelines. While the COVID-19 pandemic has impacted
some areas of our business, we believe our mitigation efforts and financial
strength will enable us to continue to manage through the pandemic and execute
on our strategic initiatives. Because the situation is extremely fluid, we are
continuing to monitor the impact COVID-19 could have on our business, including
the impact on our commercial products and the medicines in our pipeline.

Financial Highlights

The following is a summary of our financial results (in millions):



                             Three Months Ended          Nine Months Ended
                                September 30,              September 30,
                              2022          2021         2022          2021

Total revenue              $    159.8      $ 133.1     $   435.5     $  370.5
Total operating expenses   $    218.9      $ 218.9     $   637.7     $  621.2
Loss from operations       $    (59.2 )    $ (85.8 )   $  (202.2 )   $ (250.8 )
Net loss                   $    (47.0 )    $ (82.5 )   $  (217.3 )   $ (253.2 )

? Revenue increased 20 percent for the third quarter of 2022 and 18 percent on a

year-to-date basis compared to the same periods in 2021 driven by significant

partner payments earned across multiple programs

? Operating expenses were flat for the three months ended September 30, 2022

compared to the same period in 2021 and increased 3 percent for the nine months

ended September 30, 2022. Refer to the Results of Operations section for

discussions on period-over-period changes for the various components of

operating expenses

? As of September 30, 2022, we had $2.0 billion in cash and short-term

investments. Subsequent to September 30, 2022, we entered into several

real-estate transactions, which increased our cash balance. Refer to the

section titled, Liquidity and Capital Resources, for further details on these


   real-estate transactions.


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Eplontersen Collaboration with AstraZeneca



Our financial results for the nine months ended September 30, 2022 reflected the
cost-sharing provisions related to our eplontersen collaboration with
AstraZeneca to develop and commercialize eplontersen for the treatment of ATTR.
Under the terms of the collaboration agreement, AstraZeneca is paying 55 percent
of the costs associated with the ongoing global Phase 3 development program.
Because we are leading the Phase 3 development program, we are recognizing as
research and development, or R&D, revenue the 55 percent of cost-share funding
AstraZeneca is responsible for, net of our share of AstraZeneca's development
expenses, in the same period we incur the related development expenses. In the
nine months ended September 30, 2022, we have earned $55 million in joint
development revenue under this collaboration.

As AstraZeneca is responsible for the majority of the medical affairs and
commercial costs in the U.S. and all costs associated with bringing eplontersen
to market outside the U.S., we are recognizing cost-share funding we receive
from AstraZeneca related to these activities as a reduction of our medical
affairs and commercialization expenses, which we classify as R&D and selling,
general and administrative, or SG&A, expenses, respectively. In the nine months
ended September 30, 2022, we recognized $1.4 million and $1.5 million of medical
affairs expenses and commercialization expenses for eplontersen, respectively,
net of cost-share funding from AstraZeneca. We expect our medical affairs and
commercialization expenses to increase as our collaboration with AstraZeneca
progresses.

The following is a summary of the financial impacts on our statement of operations for the nine months ended September 30, 2022 of the joint development activities under our eplontersen collaboration with AstraZeneca:



 Collaboration        Financial         Impact of Cost-Sharing Provisions on our
   Activities      Statement Line               Statement of Operations
                     Eplontersen                55% of Ionis' Phase 3 development
                        Joint                 expenses, including internal+external
Phase 3              Development      $55M     costs & CMC costs, net of our share
Development:           Revenue                of AstraZeneca's Phase 3 development
Ionis leads and     (R&D Revenue)                           expenses
conducts
                     Development               100% of Ionis' Phase 3 development
                    Expenses (R&D    $107M                  expenses
                      expenses)


Critical Accounting Estimates



We prepare our condensed consolidated financial statements in conformity with
accounting principles generally accepted in the U.S. As such, we make certain
estimates, judgments and assumptions that we believe are reasonable, based upon
the information available to us. These judgments involve making estimates about
the effect of matters that are inherently uncertain and may significantly impact
our quarterly or annual results of operations and financial condition. Each
quarter, our senior management reviews the development, selection and disclosure
of such estimates with the audit committee of our board of directors. The
following are our significant accounting estimates, which we believe are the
most critical to aid in fully understanding and evaluating our reported
financial results:

? Assessing the propriety of revenue recognition and associated deferred revenue;

and

? Determining the appropriate cost estimates for unbilled preclinical studies and

clinical development activities.





There have been no other material changes to our critical accounting policies
and estimates from the information provided in Item 7, "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.

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Results of Operations

Revenue

Total revenues for the three and nine months ended September 30, 2022 were
$159.8 million and $435.5 million, respectively, compared to $133.1 million and
$370.5 million for the same periods in 2021 and were comprised of the following
(amounts in millions):

                                          Three Months Ended          Nine Months Ended
                                             September 30,              September 30,
                                           2022          2021          2022         2021
Revenue:
Commercial revenue:
SPINRAZA royalties                      $     61.6      $  66.6     $    175.1     $ 198.7
TEGSEDI and WAYLIVRA revenue, net              5.9         15.5           22.5        46.9
Licensing and other royalty revenue            4.9          2.7           25.3         9.5
Total commercial revenue                      72.4         84.8          222.9       255.1
R&D revenue:
Amortization from upfront payments            18.1         16.7           54.0        56.8
Milestone payments                            14.9         28.4           59.7        48.5
License fees                                  35.0            -           37.0           -
Other services                                 1.3          3.2            6.6        10.1
Collaborative agreement revenue               69.3         48.3          157.3       115.4
Eplontersen joint development revenue         18.1            -           55.3           -
Total R&D revenue                             87.4         48.3          212.6       115.4
Total revenue                           $    159.8      $ 133.1     $    435.5     $ 370.5



Our revenue for the three and nine months ended September 30, 2022 increased 20
percent and 18 percent compared to the same periods in 2021, respectively. The
increase was driven by significant partner payments we earned across multiple
partnered programs, including $85 million from Biogen for advancing several
neurology disease programs, $63 million from Roche for advancing and licensing
IONIS-FB-LRx and $55 million from AstraZeneca for its share of the global Phase
3 development costs for eplontersen.

Our commercial revenue for the three and nine months ended September 30, 2022
decreased 15 percent and 13 percent compared to the same periods in 2021,
respectively. SPINRAZA royalties for the three and nine months ended September
30, 2022 decreased 7 percent and 12 percent compared to the same periods in
2021, respectively. In the U.S., SPINRAZA sales were flat in the first nine
months of 2022 compared to the same period in 2021. Outside of the U.S.,
SPINRAZA royalties decreased in the first nine months of 2022 compared to the
same period in 2021 due to lower SPINRAZA product sales primarily due to
decreased pricing, foreign currency exchange and competition. TEGSEDI and
WAYLIVRA revenue decreased primarily due to the shift to distribution fees in
2021.

Operating Expenses

Our operating expenses were as follows (in millions):



                                              Three Months Ended            Nine Months Ended
                                                 September 30,                September 30,
                                              2022           2021           2022          2021
Operating expenses, excluding non-cash
compensation expense related to equity
awards                                     $    195.1      $   185.5     $    563.1     $   498.3
Restructuring expenses                              -            2.8              -          24.4
Total operating expenses, excluding
non-cash compensation expense related to
equity awards                                   195.1          188.3          563.1         522.7
Non-cash compensation expense related to
equity awards                                    23.8           30.6           74.6          98.5
Total operating expenses                   $    218.9      $   218.9     $    637.7     $   621.2



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Our operating expenses, excluding non-cash compensation expense related to
equity awards, increased for the three and nine months ended September 30, 2022
compared to the same periods in 2021. For both periods, our R&D expenses
increased due to our investments in advancing our late-stage pipeline, including
our expanding number of Phase 3 studies, which doubled over the course of 2021
from three to six studies. Our SG&A expenses increased for the three months
ended September 30, 2022 compared to the same period in 2021 due to our
go-to-market activities for eplontersen, donidalorsen and olezarsen. Our SG&A
expenses decreased for the nine months ended September 30, 2022 compared to the
same period in 2021 as a result of savings we realized from integrating Akcea
and restructuring our commercial operations for TEGSEDI and WAYLIVRA, partially
offset by the increase in expenses related to our go-to-market activities in the
third quarter of 2022. We expect our operating expenses, excluding non-cash
compensation expense related to equity awards, to increase during the fourth
quarter of 2022 compared to the same period in 2021 as we continue to advance
our late- and mid-stage pipeline, invest in expanding and diversifying our
technology and advance our go-to-market activities.

Our non-cash compensation expense related to equity awards decreased in the three and nine months ended September 30, 2022 compared to the same periods in 2021 due to decreased headcount of longer-tenured employees as a result of restructuring our commercial operations for TEGSEDI and WAYLIVRA.



To analyze and compare our results of operations to other similar companies, we
believe it is important to exclude non-cash compensation expense related to
equity awards from our operating expenses. We believe non-cash compensation
expense related to equity awards is not indicative of our operating results or
cash flows from our operations. Further, we internally evaluate the performance
of our operations excluding it.

Cost of Sales



Our cost of sales is comprised of costs related to our commercial revenue, which
consisted of manufacturing costs, including certain fixed costs, transportation
and freight, indirect overhead costs associated with the manufacturing and
distribution of TEGSEDI and WAYLIVRA and certain associated period costs.

Our cost of sales were as follows (in millions):



                                               Three Months Ended              Nine Months Ended
                                                  September 30,                  September 30,
                                              2022             2021           2022            2021
Cost of sales, excluding non-cash
compensation expense related to equity
awards                                     $      1.3       $      3.0     $      9.9       $     8.3
Non-cash compensation expense related to
equity awards                                     0.2              0.1            0.5             0.3
Total cost of sales                        $      1.5       $      3.1     $     10.4       $     8.6

Research, Development and Patent Expenses

Our research, development and patent expenses consist of expenses for antisense drug discovery, antisense drug development, manufacturing and development chemistry and R&D support expenses.



The following table sets forth information on research, development and patent
expenses (in millions):

                                              Three Months Ended            Nine Months Ended
                                                 September 30,                September 30,
                                              2022           2021           2022          2021
Research, development and patent
expenses, excluding non-cash
compensation expense related to equity
awards                                     $    165.3      $   159.6     $    469.6     $   383.9
Restructuring expenses                              -            1.8              -           8.0
Total research, development and patent
expenses, excluding non-cash
compensation expense related to equity
awards                                          165.3          161.4          469.6         391.9
Non-cash compensation expense related to
equity awards                                    17.7           23.4           55.3          72.0
Total research, development and patent
expenses                                   $    183.0      $   184.8     $    524.9     $   463.9



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Antisense Drug Discovery

We use our proprietary antisense technology to generate information about the
function of genes and to determine the value of genes as drug discovery targets.
We use this information to direct our own antisense drug discovery research, and
that of our partners. Antisense drug discovery is also the function that is
responsible for advancing our antisense core technology. This function is also
responsible for making investments in complementary technologies to expand the
reach of antisense technology.

Our antisense drug discovery expenses were as follows (in millions):



                                               Three Months Ended              Nine Months Ended
                                                  September 30,                  September 30,
                                              2022             2021           2022           2021
Antisense drug discovery expenses,
excluding non-cash compensation expense
related to equity awards                   $     25.0       $     55.9     $     68.6      $   105.7
Non-cash compensation expense related to
equity awards                                     4.2              5.9           12.8           17.5

Total antisense drug discovery expenses $ 29.2 $ 61.8 $ 81.4 $ 123.2





Antisense drug discovery expenses, excluding non-cash compensation expense
related to equity awards, decreased in the three and nine months ended September
30, 2022 compared to the same periods in 2021. In the first nine months of 2021,
we incurred certain non-recurring licensing expenses, including $35 million for
licensing Bicycle Therapeutics' peptide technology. These non-recurring
licensing expenses resulted in higher antisense drug discovery expenses in the
three and nine months ended September 30, 2021.

Antisense Drug Development

The following table sets forth drug development expenses, including expenses for our marketed medicines and those in Phase 3 development for which we have incurred significant costs (in millions):



                                               Three Months Ended            Nine Months Ended
                                                 September 30,                 September 30,
                                              2022            2021           2022          2021
TEGSEDI and WAYLIVRA                       $      3.9       $     3.3     $      9.4     $     4.7
Eplontersen                                      24.5            23.0           75.8          52.2
Olezarsen                                        18.3             4.9           39.7          10.4
Donidalorsen                                      5.5             2.0            9.1           4.6
ION363                                            2.3             1.8            5.8           5.5
Other antisense development projects             31.6            25.1           91.7          70.9
Development overhead expenses                    22.5            18.6           63.3          55.1
Restructuring expenses                              -             1.5              -           7.2
Total antisense drug development,
excluding non-cash compensation expense
related to equity awards                        108.6            80.2          294.8         210.6
Non-cash compensation expense related to
equity awards                                     7.6             9.7           15.6          31.3
Total antisense drug development
expenses                                   $    116.2       $    89.9     $    310.4     $   241.9



Our development expenses, excluding non-cash compensation expense related to
equity awards, increased for the three and nine months ended September 30, 2022
compared to the same periods in 2021 primarily due to our advancing late-stage
pipeline, including our expanding number of Phase 3 studies, which doubled over
the course of 2021 from three to six studies. Non-cash compensation expense
related to equity awards decreased in 2022 compared to 2021 due to reduced
headcount of longer-tenured employees as a result of our restructured commercial
operations.

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We may conduct multiple clinical trials on a drug candidate, including multiple
clinical trials for the various indications we may be studying. Furthermore, as
we obtain results from trials, we may elect to discontinue clinical trials for
certain drug candidates in certain indications in order to focus our resources
on more promising drug candidates or indications. Our Phase 1 and Phase 2
programs are clinical research programs that fuel our Phase 3 pipeline. When our
medicines are in Phase 1 or Phase 2 clinical trials, they are in a dynamic state
in which we may adjust the development strategy for each medicine. Although we
may characterize a medicine as "in Phase 1" or "in Phase 2," it does not mean
that we are conducting a single, well-defined study with dedicated resources.
Instead, we allocate our internal resources on a shared basis across numerous
medicines based on each medicine's particular needs at that time. This means we
are constantly shifting resources among medicines. Therefore, what we spend on
each medicine during a particular period is usually a function of what is
required to keep the medicines progressing in clinical development, not what
medicines we think are most important. For example, the number of people
required to start a new study is large, the number of people required to keep a
study going is modest and the number of people required to finish a study is
large. However, such fluctuations are not indicative of a shift in our emphasis
from one medicine to another and cannot be used to accurately predict future
costs for each medicine. And, because we always have numerous medicines in
preclinical and early stage clinical research, the fluctuations in expenses from
medicine to medicine, in large part, offset one another. If we partner a
medicine, it may affect the size of a trial, its timing, its total cost and the
timing of the related costs.

Medical Affairs

Our medical affairs function is responsible for communicating scientific and clinical information to healthcare providers, medical professionals and patients.

Our medical affairs expenses were as follows (in millions):



                                               Three Months Ended              Nine Months Ended
                                                  September 30,                  September 30,
                                              2022             2021           2022            2021
Medical affairs expenses, excluding
non-cash compensation expense related to
equity awards                              $      3.8       $      2.5     $     11.4       $     8.9
Non-cash compensation expense related to
equity awards                                     0.6              0.5            1.3             1.1
Total medical affairs expenses             $      4.4       $      3.0

$ 12.7 $ 10.0

We expect medical affairs expenses to continue increasing as we advance our late-stage pipeline.

Manufacturing and Development Chemistry



Expenditures in our manufacturing and development chemistry function consist
primarily of personnel costs, specialized chemicals for oligonucleotide
manufacturing, laboratory supplies and outside services. Our manufacturing and
development chemistry function is responsible for providing drug supplies to
antisense drug development and our collaboration partners. Our manufacturing
procedures include testing to satisfy good laboratory and good manufacturing
practice requirements.

Our manufacturing and development chemistry expenses were as follows (in
millions):

                                               Three Months Ended              Nine Months Ended
                                                  September 30,                  September 30,
                                              2022             2021           2022            2021
Manufacturing and development chemistry
expenses, excluding non-cash
compensation expense related to equity
awards                                     $     14.0       $     10.9     $     53.4       $    31.3
Restructuring expenses                              -              0.2              -             0.8
Total manufacturing and development
chemistry expenses, excluding non-cash
compensation expense related to equity
awards                                           14.0             11.1           53.4            32.1
Non-cash compensation expense related to
equity awards                                     2.3              2.9            7.6             9.1
Total manufacturing and development
chemistry expenses                         $     16.3       $     14.0     $     61.0       $    41.2

Manufacturing and development chemistry expenses, excluding non-cash compensation expense related to equity awards, increased in the three and nine months ended September 30, 2022 compared to the same periods in 2021 due to increased costs we incurred in preparation for our near-term commercial launches, including manufacturing costs and activities for eplontersen, olezarsen and donidalorsen.


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R&D Support

In our research, development and patent expenses, we include support costs such
as rent, repair and maintenance for buildings and equipment, utilities,
depreciation of laboratory equipment and facilities, amortization of our
intellectual property, informatics costs, procurement costs and waste disposal
costs. We call these costs R&D support expenses.

The following table sets forth information on R&D support expenses (in
millions):

                                               Three Months Ended              Nine Months Ended
                                                  September 30,                  September 30,
                                              2022             2021           2022            2021
Personnel costs                            $      5.3       $      4.7     $     15.4       $    13.2
Occupancy                                         4.1              3.2           12.3             9.6
Patent expenses                                   0.9              1.0            3.1             3.1
Insurance                                         1.0              0.8            2.8             2.4
Computer software and licenses                    0.1              0.3            1.1             1.4
Other                                             2.5              1.6            6.7             4.8
Restructuring expenses                              -              0.1              -             0.1
Total R&D support expenses, excluding
non-cash compensation expense related to
equity awards                                    13.9             11.7           41.4            34.6
Non-cash compensation expense related to
equity awards                                     3.0              4.4           10.4            13.0
Total R&D support expenses                 $     16.9       $     16.1     $     51.8       $    47.6



R&D support expenses, excluding non-cash compensation expense related to equity
awards, for the three and nine months ended September 30, 2022 increased
compared to the same periods in 2021. The increase was primarily related to
increased occupancy and personnel costs to support advancing our pipeline and
our technology. In October 2022, we executed a sale and leaseback transaction
for our headquarters in Carlsbad, California. As a result, our occupancy costs
will increase beginning in the fourth quarter of 2022 because we will begin
incurring rent expense for these facilities.

Selling, General and Administrative Expenses



Selling, general and administrative, or SG&A, expenses include personnel and
outside costs associated with the pre-commercialization and commercialization
activities for our medicines and costs to support our company, our employees and
our stockholders including, legal, human resources, investor relations, and
finance. Additionally, we include in selling, general and administrative
expenses such costs as rent, repair and maintenance of buildings and equipment,
depreciation and utilities costs that we need to support the corporate functions
listed above. We also include fees we owe under our in-licensing agreements
related to SPINRAZA.

The following table sets forth information on SG&A expenses (in millions):



                                               Three Months Ended             Nine Months Ended
                                                  September 30,                 September 30,
                                              2022             2021           2022          2021
Selling, general and administrative
expenses, excluding non-cash
compensation expense related to equity
awards                                     $     28.5       $     23.0     $     83.6     $   106.1
Restructuring expenses                              -              1.0              -          16.4
Total selling, general and
administrative expenses, excluding
non-cash compensation related to equity
awards                                           28.5             24.0           83.6         122.5
Non-cash compensation expense related to
equity awards                                     5.9              7.1           18.8          26.2
Total selling, general and
administrative expenses                    $     34.4       $     31.1     $    102.4     $   148.7



SG&A expenses, excluding non-cash compensation expense related to equity awards,
increased for the three months ended September 30, 2022 compared to the same
period in 2021 due to our go-to-market activities for eplontersen, donidalorsen
and olezarsen. SG&A expenses, excluding non-cash compensation expense related to
equity awards, for the nine months ended September 30, 2022 decreased compared
to the same period in 2021 due to operating efficiencies achieved from the Akcea
Merger and restructuring our commercial operations for TEGSEDI and WAYLIVRA,
partially offset by increased expenses for our go-to-market preparations for our
near-term commercial opportunities. Non-cash compensation expense related to
equity awards decreased in the three and nine months ended September 30, 2022
compared to the same periods in 2021 due to reduced headcount as a result of the
Akcea Merger and our restructured commercial operations.

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Investment Income

The following table sets forth information on investment income (in millions):

                                               Three Months Ended September 30,             Nine Months Ended September 30,
                                                2022                      2021                 2022                   2021

Investment income                          $           7.5           $           0.9     $           13.4         $         8.2



Our investment income increased for the three and nine months ended September
30, 2022 due to higher interest rates in the nine months ended September 30,
2022 compared to the same period in 2021.

Interest Expense



The following table sets forth information on interest expense (in millions):

                                               Three Months Ended               Nine Months Ended
                                                  September 30,                   September 30,
                                              2022             2021           2022             2021
Convertible notes:
Non-cash amortization of debt issuance
costs                                      $      1.3       $      1.4     $      4.0       $      3.5
Interest expense payable in cash                  0.2              0.3            0.5              1.7
Interest on mortgages for primary R&D
and manufacturing facilities                      0.6              0.6            1.9              1.9
Total interest expense                     $      2.1       $      2.3     $      6.4       $      7.1



Gain (Loss) on Investments

The following table sets forth information on gain (loss) on investments (in millions):



                                               Three Months Ended September 

30, Nine Months Ended September 30,


                                                2022                      2021              2022                 2021
Gain (loss) on investments                 $           2.3           $           4.0     $     (10.6 )       $        4.9

The period-over-period fluctuations in our gain (loss) on investments were primarily driven by changes in fair value of our investments in publicly held biotechnology companies.



Other Expense

In the second quarter of 2022, we recorded a non-operating expense of $12.5
million related to a settlement agreement for a litigation claim that we
determined to be probable and estimable as of June 30, 2022. In the third
quarter of 2022, we received insurance contributions toward the settlement in
the amount of $4.8 million from our insurance carriers. We recorded the
insurance contributions as a reduction to the litigation settlement expense in
the third quarter of 2022. Refer to Note 8, Legal Proceedings, for further
details regarding the litigation.

In April 2021, as a result of a debt offering and debt repurchase, we recorded
an $8.6 million loss on early retirement of debt, reflecting the early
retirement of a portion of our 1% Notes, in the second quarter of 2022. The loss
on the early retirement of our debt is the difference between the amount we paid
to retire our 1% Notes and the net carrying balance of the liability at the time
that we retired the debt.

Income Tax Expense

Beginning in 2022, the Tax Cuts and Jobs Act of 2017, or TCJA, requires
taxpayers to amortize research and development expenditures over five years
pursuant to IRC Section 174. Although the U.S. Congress is considering
legislation that would defer the amortization requirement to later years, we
have no assurance that the provision will be repealed or otherwise modified.
Since we expect taxable income in 2022, we recorded income tax expense of $0.3
million and $3.6 million for the three and nine months ended September 30, 2022,
respectively, compared to income tax benefit of $1.3 million and $0.9 million
for the same periods in 2021.

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Net Loss and Net Loss per Share



We had a net loss of $47.0 million and $217.3 million for the three and nine
months ended September 30, 2022, respectively. We had a net loss of $82.5
million and $253.2 million for the same periods in 2021. Our net loss decreased
for the three and nine months ended September 30, 2022 compared to the same
period in 2021 primarily due to increased revenue, partially offset by increased
expenses year-over-year, as discussed in the revenue and expense sections,
respectively. Basic and diluted net loss per share for the three and nine months
ended September 30, 2022 were $0.33 and $1.53, respectively, compared to $0.58
and $1.80 for the same periods in 2021.

Liquidity and Capital Resources



We have financed our operations primarily from research and development
collaborative agreements. We also finance our operations from commercial revenue
from SPINRAZA royalties and TEGSEDI and WAYLIVRA commercial revenue. From our
inception through September 30, 2022, we have earned approximately $6.3 billion
in revenue. We have also financed our operations through the sale of our equity
securities and the issuance of long-term debt. From the time we were founded
through September 30, 2022, we have raised net proceeds of approximately $2.0
billion from the sale of our equity securities. Additionally, from our inception
through September 30, 2022, we have borrowed approximately $2.1 billion under
long-term debt arrangements to finance a portion of our operations.

Our cash, cash equivalents and short-term investments, debt obligations and working capital did not change significantly from December 31, 2021 to September 30, 2022.



The following table summarizes our contractual obligations as of September 30,
2022. The table provides a breakdown of when obligations become due. We provide
a more detailed description of the major components of our debt in the
paragraphs following the table:

Contractual Obligations

                                                               Payments Due by Period (in millions)
                                                                                                   More than
(selected balances described below)                      Total             Less than 1 year          1 year
0% Notes (principal payable)                         $        632.5       $                -       $    632.5
0.125% Notes (principal and interest payable)                 550.6                      0.7            549.9

Building mortgage payments (principal and interest payable)

                                                       71.5                      3.4             68.1
Operating leases                                               25.3                      4.4             20.9
Other obligations (principal and interest payable)              0.8                      0.1              0.7
Total                                                $      1,280.7       $              8.6       $  1,272.1



Our contractual obligations consist primarily of our convertible debt. In
addition, we also have facility mortgages, facility leases, equipment financing
arrangements and other obligations. Due to the uncertainty with respect to the
timing of future cash flows associated with our unrecognized tax benefits, we
are unable to make reasonably reliable estimates of the period of cash
settlement with the respective taxing authorities. Therefore, we have excluded
our gross unrecognized tax benefits from our contractual obligations table
above. We have not entered into, nor do we currently have, any off-balance sheet
arrangements (as defined under SEC rules).

In October 2022, we entered into a build-to-suit lease in which the lessor will
construct a new development chemistry and manufacturing facility to support our
continued our continued growth. In addition, we entered into a sale and
leaseback agreement for our headquarters location in October 2022. The table
above does not include the lease obligations related to these transactions or
the extinguishment of the mortgage because they closed subsequent to September
30, 2022.

Convertible Debt and Call Spread



Refer to our Convertible Debt and Call Spread accounting policies in Note 2,
Significant Accounting Policies, and Note 7, Convertible Debt, in the Notes to
our condensed consolidated financial statements for the significant terms of
each convertible debt instrument.

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Operating Facilities

In July 2017, we purchased the building that houses our primary R&D facility for
$79.4 million and our manufacturing facility for $14.0 million. We financed the
purchase of these two facilities with mortgage debt of $60.4 million in total.
Our primary R&D facility mortgage has an interest rate of 3.88 percent. Our
manufacturing facility mortgage has an interest rate of 4.20 percent. During the
first five years of both mortgages, we were only required to make interest
payments. Both mortgages mature in August 2027.

In October 2022, we concurrently entered into two purchase and sale agreements
with a real estate investor. Under the agreements, we sold and leased back the
facilities at our headquarters location in Carlsbad, California and will sell,
subject to meeting certain closing conditions, two lots of undeveloped land
adjacent to our headquarters. We sold the facilities at our headquarters for a
total purchase price of $263.4 million and we expect to receive total proceeds
of $33.0 million upon the close of the sale of the two lots. We used a portion
of the sale proceeds to extinguish our mortgage debt on our headquarters
facilities of $51.3 million. The initial lease term for our headquarters
facilities is 15 years with options to extend the lease for two additional terms
of five years each. In connection with the sale of our two undeveloped lots, we
will enter into a build-to-suit lease agreement with the same real estate
investor who will build a new R&D facility for us on those lots. Once this new
facility is completed, our lease will commence.

In October 2022, we entered into a build-to-suit lease agreement to lease a
development chemistry and manufacturing facility in Oceanside, California. The
lessor will develop and construct a 217,000-square-foot building, composed of
manufacturing space, office space, research and development space and warehouse
space. We will design and construct tenant improvements to customize the
facility's interior space. We will lease the facility for an initial term of 20
years and 3 months with options to extend the lease for two additional terms of
10 years each. The lease will commence when the lessor's construction is
complete and we are able to occupy the facility.

Other Obligations



In addition to contractual obligations, we had outstanding purchase orders as of
September 30, 2022 for the purchase of services, capital equipment and materials
as part of our normal course of business.

We may enter into additional collaborations with partners which could provide
for additional revenue to us and we may incur additional cash expenditures
related to our obligations under any of the new agreements we may enter into. We
currently intend to use our cash, cash equivalents and short-term investments to
finance our activities. However, we may also pursue other financing
alternatives, like issuing additional shares of our common stock, issuing debt
instruments, refinancing our existing debt, or securing lines of credit. Whether
we use our existing capital resources or choose to obtain financing will depend
on various factors, including the future success of our business, the prevailing
interest rate environment and the condition of financial markets generally.

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