You should read the following discussion and analysis of our financial condition
and results of operations together with our consolidated financial statements
and related notes appearing elsewhere in this Annual Report on Form 10-K, or
Annual Report. In addition to historical information, this discussion and
analysis contains forward-looking statements that involve risks, uncertainties
and assumptions. We caution you that forward-looking statements are not
guarantees of future performance, and that our actual results of operations,
financial condition and liquidity, and the developments in our business and the
industry in which we operate, may differ materially from the results discussed
or projected in the forward-looking statements contained in this Annual Report.
We discuss risks and other factors that we believe could cause or contribute to
these potential differences elsewhere in this report, including under Part I,
Item 1A, "Risk Factors" and under "Cautionary Note Regarding Forward-Looking
Statements" in this Annual Report. In addition, even if our results of
operations, financial condition and liquidity, and the developments in our
business and the industry in which we operate are consistent with the
forward-looking statements contained in this Annual Report, they may not be
predictive of results or developments in future periods. We caution readers not
to place undue reliance on any forward-looking statements made by us, as such
statements speak only as of the date they are made. We disclaim any obligation,
except as specifically required by law and the rules of the Securities and
Exchange Commission, or SEC, to publicly update or revise any such statements to
reflect any change in our expectations or in events, conditions or circumstances
on which any such statements may be based, or that may affect the likelihood
that actual results will differ from those set forth in the forward-looking
statements.

Information pertaining to fiscal year 2018 was included in the Company's Annual
Report on Form 10-K for the year-ended December 31, 2019, on pages 82 through
100, under Part II, Item 7, "Management's Discussion and Analysis of Financial
Condition and Results of Operations," which was filed with the SEC on February
27, 2020.

                                    Overview

We are a biopharmaceutical company committed to developing and commercializing
novel medicines with the potential to transform the lives of people with
debilitating disorders of the brain. Our first product, ZULRESSO® (brexanolone)
CIV injection, is approved in the U.S. for the treatment of postpartum
depression, or PPD, in adults. We have a portfolio of other product candidates
with a current focus on modulating two critical central nervous system, or CNS,
receptor systems, GABA and NMDA. The GABA receptor family, which is recognized
as the major inhibitory neurotransmitter in the CNS, mediates downstream
neurologic and bodily function via activation of GABAA receptors. The NMDA-type
receptors of the glutamate receptor system are a major excitatory receptor
system in the CNS. Dysfunction in these systems is implicated in a broad range
of CNS disorders. We are currently targeting diseases and disorders of the brain
with three key focus areas: depression, neurology and neuropsychiatry.

Our first product, ZULRESSO, is a proprietary intravenous formulation of
brexanolone, approved in the U.S. as a treatment for postpartum depression, or
PPD, in adults. Brexanolone is chemically identical to allopregnanolone, a
naturally occurring neuroactive steroid that acts as a positive allosteric
modulator of GABAA receptors. We launched ZULRESSO commercially in the U.S. in
June 2019.

Our next most advanced product candidate is zuranolone (SAGE-217), a novel oral
compound being developed for certain affective disorders, including major
depressive disorder, or MDD, and PPD. Zuranolone is a neuroactive steroid that,
like brexanolone, is a positive allosteric modulator of GABAA receptors,
targeting both synaptic and extrasynaptic GABAA receptors. We are currently
conducting three Phase 3 placebo-controlled clinical trials of zuranolone - the
WATERFALL Study and the CORAL Study in MDD, and the SKYLARK Study in PPD - as
well as an open-label Phase 3 clinical trial in MDD known as the SHORELINE
Study. We expect to report topline results from the WATERFALL Study in the first
half of 2021, and topline results from the other zuranolone Phase 3 clinical
trials at various times throughout the remainder of 2021.

In addition to zuranolone, we have a portfolio of other novel compounds that
target GABAA receptors, including SAGE-324. SAGE-324 is a novel GABAA receptor
positive allosteric modulator intended for chronic oral dosing. We are currently
conducting a placebo-controlled Phase 2 clinical trial evaluating the safety and
efficacy of SAGE-324 in the treatment of essential tremor, known as the KINETIC
Study. We expect to report topline data from this study in early

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2021. If the results of the KINETIC Study support further development, we expect
to initiate additional development activities including the next
placebo-controlled Phase 2 clinical trial of SAGE-324 in essential tremor in
late 2021 to explore dose and frequency, including potential formulations. We
believe SAGE-324 also has potential for the treatment of a number of other
neurological conditions, including epilepsy and Parkinson's disease.

We are jointly developing zuranolone and SAGE-324 in the U.S. with Biogen MA
Inc., or BIMA, and Biogen International GmbH, or, together with BIMA, Biogen,
under a collaboration and license agreement, or the Biogen Collaboration
Agreement, that became effective in December 2020. Under the Biogen
Collaboration Agreement, we will also jointly commercialize products containing
zuranolone, which we refer to as Licensed 217 Products, and products containing
SAGE-324, which we refer to as Licensed 324 Products, with Biogen in the U.S. if
our development efforts are successful. We refer to the Licensed 217 Products
and Licensed 324 Products collectively as the Licensed Products. In addition, we
have granted Biogen sole rights to develop and commercialize the Licensed
Products outside the U.S., other than in Japan, Taiwan and South Korea, or the
Existing Partner Territory, where we have granted rights to Shionogi & Co.,
Ltd., or Shionogi, with respect to zuranolone. We refer to the territories
outside the U.S. to which Biogen has rights under the Biogen Collaboration
Agreement with respect to the applicable Licensed Product as the Biogen
Territory.

Our second area of focus for future clinical development is novel compounds that
target the NMDA receptor. The first product candidate selected for development
from this program is SAGE-718, an oxysterol-based positive allosteric modulator
of the NMDA receptor, which we are exploring in certain cognition-related
disorders associated with NMDA receptor dysfunction, including cognition
dysfunction associated with diseases such as Huntington's disease, Parkinson's
disease and Alzheimer's disease. We are currently conducting a Phase 2a
open-label study of SAGE-718 evaluating patients with Parkinson's disease
cognitive dysfunction, known as the PARADIGM Study, and a Phase 2a open-label
clinical trial of SAGE-718 in patients with Alzheimer's disease mild cognitive
impairment and mild dementia, known as the LUMINARY Study. We expect to report
topline data from the PARADIGM Study in early 2021 and from the LUMINARY Study
in late 2021. We plan to initiate further development activities including a
placebo-controlled Phase 2 clinical trial with SAGE-718 in late 2021 with the
indication and design to be informed by the results of these clinical trials as
well as results of an earlier Phase 1 clinical trial in Huntington's disease.



We have other compounds at earlier stages of development with a focus on both
acute and chronic brain healthy disorders. Our early-stage GABAA modulators
include SAGE-689, expected to begin Phase 1 development in 2021 as a potential
intramuscular therapy for disorders associated with acute GABA hypofunction, and
SAGE-319, intended to be studied as an oral therapy for potential use in
disorders of social interaction. Our early-stage NMDA modulators include
SAGE-904, in Phase 1 development as a potential oral therapy for disorders
associated with NMDA hypofunction, and SAGE-421, intended to be studied as a
potential oral therapy for certain neurodevelopmental disorders and cognitive
recovery and rehabilitation. We expect to continue our work on allosteric
modulation of the GABAA and NMDA receptor systems in the brain. The GABAA and
NMDA receptor systems are broadly accepted as impacting many psychiatric and
neurological disorders, spanning disorders of mood, seizure, cognition, anxiety,
sleep, pain, and movement, among others. We believe that we may have the
opportunity to develop molecules from our internal portfolio with the goal of
addressing a number of these disorders in the future. We believe that we may
also have the opportunity to use our scientific approach to explore targets
beyond the GABAA and NMDA receptor systems and to develop compounds in areas of
unmet need outside of brain health.

We began to generate revenue from product sales in the second quarter of 2019 in
conjunction with the launch of our first product, ZULRESSO in June 2019. Prior
to the second quarter of 2019, all of our revenue had been derived from a
strategic collaboration we entered into in mid-2018 with Shionogi for the
clinical development and commercialization of zuranolone in the Existing Partner
Territory. In the fourth quarter of 2020, we recorded revenue from the strategic
collaboration with and stock purchase by Biogen.

We have incurred net losses in each year since our inception, except for net
income of $606.1 million for the year ended December 31, 2020, because of
revenue recognized under a license and collaboration agreement with Biogen, and
we had an accumulated deficit of $1.0 billion as of December 31, 2020. Our net
losses were $680.2 million and $372.9 million for the years ended December 31,
2019 and 2018, respectively. These losses have resulted principally from costs
incurred in connection with research and development activities and selling,
general and administrative costs associated

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with our operations and our commercial build. We expect to incur significant expenses and increasing operating losses for the foreseeable future.

We expect that we will incur significant expenses in the foreseeable future in connection with our ongoing activities, if and as we:

• continue to advance Phase 3 clinical development and regulatory activities

with respect to zuranolone in PPD and MDD, and potentially advance

zuranolone for other indications, as part of our strategic collaboration

with Biogen;

• continue our commercialization efforts with respect to ZULRESSO in the


        treatment of PPD in the U.S., with a primary focus in geographies that
        have existing, active ZULRESSO treating sites;

• complete the ongoing KINETIC Study in essential tremor, and, if the

results support further development, initiate additional development

activities including the next placebo-controlled Phase 2 clinical trial

with SAGE-324 in essential tremor to explore dose and frequency, including

potential formulations, with potential future development in epilepsy,


        Parkinson's disease, and other neurological conditions, as part of our
        strategic collaboration with Biogen;

• complete the ongoing Phase 2a open-label PARADIGM Study of patients with

Parkinson's disease cognitive dysfunction and Phase 2a open-label LUMINARY

Study of patients with Alzheimer's disease mild cognitive impairment and

mild dementia, and initiate planned placebo-controlled Phase 2 clinical


        trial with indication and design to be determined based on results of
        completed and ongoing SAGE-718 clinical trials;

• support our collaboration with Biogen with respect to zuranolone and

SAGE-324 in the U.S., and support Biogen's development of zuranolone and

SAGE-324 in Biogen's licensed territories outside the U.S. and Shionogi's

development of zuranolone in the Existing Partner Territory;

• advance SAGE-689 and SAGE-904 in Phase 1 clinical development, including

conducting planned Phase 1 clinical trials;

• continue our research and development efforts to evaluate the potential


        for our existing product candidates in the treatment of additional
        indications or in new formulations;

• identify new targets, and generate and test new compounds and product

candidates, with a focus on indications where we believe we can make

well-informed, rapid go/no-go decisions, with the goal of developing a

diversified portfolio of assets with differentiated features;

• prepare and file new drug applications with the U.S. Food and Drug

Administration, or FDA, and conduct pre-launch activities with respect to

any of our product candidates that have been successfully developed;

• commercialize any product candidates for which we obtain regulatory


        approval, including the manufacture of commercial supplies;


    •   at the appropriate time, as our development efforts progress, add

personnel, including personnel to support product development and ongoing

and future commercialization efforts;

• evaluate the market potential and regulatory pathways for our product


        candidates beyond zuranolone and SAGE-324 in the European Union and other
        countries outside the U.S., and determine how best to move forward where
        and when it may make business and strategic sense;

• continue to build, maintain, defend, leverage, and expand our intellectual


        property portfolio, including by utilizing the strengths of our
        proprietary chemistry platform and scientific know-how to expand our
        portfolio of


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new chemical entities to lessen our long-term reliance on the success of

any one program and to facilitate long-term growth; and

• continue to explore opportunities to establish agreements or alliances


        with other pharmaceutical companies, at the appropriate time, where we
        believe a collaboration will add significant value to our efforts,
        including through capabilities, infrastructure, speed or financial

contributions, or to acquire new compounds, product candidates or products


        if we believe such opportunities will help us achieve our goals or meet
        other strategic objectives.


Until such time that we can generate significant revenue from product sales, if
ever, we expect to finance our operations primarily through a combination of
revenue, equity or debt financings and other sources, including our
collaborations with Biogen, Shionogi, and potentially, in the future, additional
third parties. We may not be successful in our commercialization of ZULRESSO or
any other product, and may not generate meaningful revenue or revenue at the
levels or on the timing necessary to support our investment and goals. We may
never successfully complete development of any of our current or future product
candidates, obtain necessary regulatory approval for such product candidates, or
achieve commercial viability for any resulting approved product. We may not
obtain or maintain adequate patent protection or other exclusivity for our
products or product candidates. Adequate additional financing may not be
available to us on acceptable terms, or at all. Our inability to raise capital
if and when needed would have a negative impact on our financial condition and
on our ability to pursue our business strategy. Arrangements with our existing
collaborators have required us to relinquish rights to certain of our
technologies or product candidates, and any future collaborations may require us
to relinquish additional rights. We will need to generate significant revenue to
achieve profitability, and we may never do so.

We expect that our existing cash, cash equivalents and marketable securities as
of December 31, 2020, will enable us to fund our operating expenses and capital
expenditure requirements, based on our current operating plan, for at least the
next 12 months from the filing date of this Annual Report. See "-Liquidity and
Capital Resources".

                         Financial Operations Overview

Revenue

We began to generate revenue from product sales in the second quarter of 2019 in
conjunction with the launch of our first product, ZULRESSO in June 2019. Prior
to the second quarter of 2019, all of our revenue had been derived from a
strategic collaboration we entered into in mid-2018 with Shionogi.

Our revenue from sales of ZULRESSO has been negatively impacted by significant
barriers arising from the complex requirements for treatment, and, more
recently, by the spread of COVID-19 in the U.S.  ZULRESSO is administered as a
continuous infusion given over two and a half days. Because of the risk of
serious harm resulting from excessive sedation or sudden loss of consciousness
during the ZULRESSO infusion, ZULRESSO must be administered only in a
medically-supervised healthcare setting that has been certified under a REMS
program and meets the other requirements of the REMS program, including
requirements related to monitoring of the patient during the infusion.  The
actions required for a healthcare setting to be ready and willing to treat women
with PPD are complex and time-consuming.  These actions include: becoming
REMS-certified; achieving formulary approvals; establishing protocols for
administering ZULRESSO; and securing satisfactory reimbursement. Sites must
often negotiate reimbursement on a payor-by-payor basis under commercial
coverage.  These requirements have created significant barriers to treatment,
and are expected to continue to limit future revenue growth. These barriers have
been compounded by the COVID-19 pandemic.  The spread of COVID-19 in the U.S.
has resulted in a significant number of sites of care pausing treatment of new
patients with ZULRESSO and potential new sites of care pausing site activation
activities. We believe concerns about exposure to the virus have also caused a
significant reduction in the number of women with PPD seeking treatment with
ZULRESSO and in physicians willing to prescribe it. Given the continuing
concerns about the COVID-19 pandemic across the country, we expect the
significant adverse impact of the pandemic on ZULRESSO revenues to continue. We
anticipate that the COVID-19 pandemic will also continue to have an adverse
impact on our results of operations from sales of ZULRESSO as pandemic-related
restrictions are expected to continue to be in effect for the foreseeable
future. The scope and timing of the expected negative impact will depend on,
among other factors, the

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duration and severity of precautionary measures taken to curb the spread of COVID-19, the length, location and frequency of surges or waves of COVID-19 cases and the timing and success of the roll-out of vaccines for COVID-19 and any return to normal business operations across the U.S.



In April 2020, we implemented a workforce reduction that primarily affected the
ZULRESSO commercial operation and related support functions, including
eliminating the entirety of our salesforce at that time. While we remain
committed to working with healthcare providers and women with PPD seeking access
to ZULRESSO and plan to continue to evaluate opportunities to raise awareness
and help reduce hurdles to appropriate treatment, our ongoing commercial
efforts, including our small account management field-based team and a small
number of sales representatives, are primarily focused on geographies that have
existing, active ZULRESSO treating sites. We expect that this approach to our
commercial efforts may continue to substantially limit the revenue opportunity
for ZULRESSO.



We expect that ZULRESSO revenues are likely to fluctuate quarter to quarter. We
will not generate revenue from other products unless and until we or any of our
collaborators successfully develop, obtain regulatory approval of, and
commercialize one of our current or future product candidates. If we enter into
additional collaboration agreements with third parties for our product
candidates, we may generate revenue from those collaborations. We expect that
revenue, if any, that we may generate under our collaboration agreements will
fluctuate from quarter to quarter as a result of the timing and amount of
license fees, payments for clinical materials or manufacturing services,
milestone payments, royalties paid to us and our share of collaboration profits
or losses resulting from sales of any commercialized products, and other
payments.

In June 2018, we entered into a strategic collaboration with Shionogi for the
clinical development and commercialization of zuranolone for the treatment of
MDD and other potential indications in the Existing Partner Territory. Under the
terms of the agreement, Shionogi is responsible for all clinical development,
regulatory filings and commercialization and manufacturing of zuranolone for
MDD, and potentially other indications, in the Existing Partner Territory. In
October 2018, we also entered into a supply agreement with Shionogi for
zuranolone clinical material. To date, revenue from our collaboration with
Shionogi has come from an initial, upfront license fee upon execution of the
collaboration agreement of $90.0 million, which was recorded as collaboration
revenue in the year ended December 31, 2018, and for the supply of active
pharmaceutical agreement, or API, for Shionogi's clinical trials.



In November 2020, we entered into the Biogen Collaboration Agreement with Biogen
for the development, manufacture and commercialization of the Licensed Products.
In connection with the execution of the Biogen Collaboration Agreement, we also
entered into a stock purchase agreement for the sale and issuance to BIMA of
6,241,473 shares of our common stock. The Biogen Collaboration Agreement became
effective on December 28, 2020, and the sale of the common stock under the stock
purchase agreement closed on December 31, 2020. Under the terms of the Biogen
Collaboration Agreement we will jointly develop and commercialize the Licensed
Products in the U.S., and Biogen solely will develop and commercialize the
Licensed Products in the Biogen Territory, except, with respect to the Licensed
217 Products, in the Existing Partner Territory. We and Biogen have agreed to
share equally all costs for activities under the Biogen Collaboration Agreement
solely for the U.S. Biogen is solely responsible for all costs for activities
under the Biogen Collaboration Agreement in the Biogen Territory. In the year
ended December 31, 2020, we recorded collaboration revenue of $1.1 billion,
consisting of an upfront payment of $875.0 million plus $232.5 million in excess
proceeds from the equity investment under the stock purchase agreement, when
measured at fair value.

Cost of goods sold

Cost of goods sold includes direct and indirect costs related to the
manufacturing and distribution of ZULRESSO, including third-party manufacturing
costs, packaging services, freight, third-party royalties payable on our net
product revenues and amortization of intangible assets associated with ZULRESSO.
We estimate that our cost of goods sold as a percentage of net product revenue
will remain in the mid-single digit percentage range for the foreseeable future.
We expect to utilize zero-cost inventory with respect to ZULRESSO for an
extended period of time.



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Operating Expenses

Our operating expenses since inception have consisted primarily of costs associated with research and development activities and selling, general and administrative activities.

Research and Development Expenses





Research and development expenses, which consist primarily of costs associated
with our product research and development efforts, are expensed as incurred.
Research and development expenses consist primarily of:

• personnel costs, including salaries, benefits, stock-based compensation

and travel expenses, for employees engaged in research and development

functions;

• expenses incurred under agreements with contract research organizations,

or CROs, and sites that conduct our non-clinical studies and clinical

trials;

• expenses associated with manufacturing materials for use in non-clinical


        studies and clinical trials and developing external manufacturing
        capabilities;


    •   costs of outside consultants engaged in research and development
        activities, including their fees and travel expenses;

• other expenses related to our non-clinical studies and clinical trials and


        expenses related to our regulatory activities;


  • payments made under our third-party license agreements; and

• a portion of our information technology, facilities and other related

expenses, including rent, depreciation, maintenance of facilities,

insurance and supplies.

Costs for certain development activities are recognized based on an evaluation of the progress to completion of specific tasks using information and data provided to us by our vendors and our clinical sites.



We have been developing our product candidates and focusing on other research
and development programs, including exploratory efforts to identify new
compounds, target validation for identified compounds and lead optimization for
our earlier-validated programs. Our direct research and development expenses are
tracked on a program-by-program basis, and consist primarily of external costs,
such as fees paid to investigators, central laboratories, CROs and contract
manufacturing organizations, in connection with our non-clinical studies and
clinical trials; third-party license fees related to our product candidates; and
fees paid to outside consultants who perform work on our programs. We do not
allocate employee-related costs and other indirect costs to specific research
and development programs because these costs are deployed across multiple
product programs under research and development and, as such, are separately
classified as unallocated or stock-based compensation in research and
development expenses.

Research and development activities are central to our business. Product
candidates in later stages of clinical development generally have higher
development costs than those in earlier stages of clinical development,
primarily due to the increased size and duration of later-stage clinical trials.
We expect that our research and development expenses will continue to increase
in the foreseeable future as we continue or initiate clinical trials and
non-clinical studies for certain product candidates and pursue later stages of
clinical development of our product candidates.

We cannot determine with certainty the duration and costs of the current or future clinical trials of our product candidates. The duration, costs, and timing of clinical trials and development of our product candidates will depend on a variety of factors, including:

• the scope, size, rate of progress, and expense of our ongoing as well as

any additional clinical trials, non-clinical studies, and other research


        and development activities;


    •   future results of ongoing, planned or future clinical trials and
        non-clinical studies;

• decisions by regulatory authorities related to our product candidates;




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  • uncertainties in clinical trial enrollment rate or design;


  • significant and changing government regulation; and


  • the receipt and timing of regulatory approvals, if any.


In addition, the ongoing COVID-19 pandemic may also negatively impact our
ongoing and planned development activities and increase our research and
development costs.  Concerns, precautions and restrictions arising from the
COVID-19 pandemic may substantially slow clinical site recruitment and
initiation and enrollment in our clinical trials, may impair the conduct,
auditing, monitoring, or completion of our trials, may impair or impede the
timeliness and completion of our data collection and analysis efforts or the
integrity of our data, or may cause us to pause trials, in each case which may
significantly impact our ability to meet our expected timelines or cause us to
change our plans and may significantly increase our research and development
costs. For example, we have seen some slower recruitment in certain of our
clinical trials, especially with respect to older patients.

A change in the outcome of any of these variables with respect to the
development of a product candidate could mean a significant change in the costs
and timing associated with the development of that product candidate. For
example, if the FDA or another regulatory authority were to require us to
conduct clinical trials beyond those that we currently anticipate will be
required for the completion of clinical development of a product candidate or
for regulatory approval, or if we experience significant delays in enrollment in
any of our clinical trials or need to enroll additional patients, we could be
required to expend significant additional financial resources and time on the
completion of clinical development.

Any failure to complete any stage of the development of any potential product
candidates in a timely manner could have a material adverse effect on our
operations, financial position and liquidity. A discussion of some of the risks
and uncertainties associated with not completing our programs on schedule, or at
all, and the potential consequences of failing to do so, are set forth in Part
I, Item 1A, "Risk Factors".

Selling, General and Administrative Expenses



Selling, general and administrative expenses consist primarily of personnel
costs, including salaries, benefits and travel expenses for our executive,
finance, business, commercial, corporate development and other administrative
functions, and stock-based compensation expense. Selling, general and
administrative expenses also include professional fees for expenses incurred
under agreements with third parties relating to the commercialization of
ZULRESSO; public relations, audit, tax and legal services, including legal
expenses to pursue patent protection of our intellectual property; and a portion
of our information technology, facilities and other related expenses, including
rent, depreciation, maintenance of facilities, insurance and supplies.

In April 2020, we implemented a workforce reduction that primarily affected the
ZULRESSO commercial operation and related support functions, including
eliminating the entirety of our salesforce at that time. While we remain
committed to working with healthcare providers and women with PPD seeking access
to ZULRESSO and plan to continue to evaluate opportunities to raise awareness
and help reduce hurdles to appropriate treatment, our ongoing commercial
efforts, including our small account management field-based team and a small
number of sales representatives, are primarily focused on geographies that have
existing, active ZULRESSO treating sites.  Even with the expected reduction in
selling, general and administrative expenses as a result of the restructuring,
we expect to continue to incur significant commercialization expenses, including
payroll and related expenses, to support our ongoing commercial activities
associated with ZULRESSO.  We expect that selling, general and administrative
expenses will increase in the future if we are successful in our development
efforts and are preparing for potential commercialization of our current or
future product candidates, if approved. We expect to continue to incur
significant expenses associated with general operations, including costs related
to accounting and legal services, director and officer insurance premiums,
facilities and other corporate infrastructure and office-related costs, such as
information technology costs.

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      Critical Accounting Policies and Significant Judgments and Estimates

Our consolidated financial statements are prepared in accordance with generally
accepted accounting principles in the U.S. The preparation of our consolidated
financial statements and related disclosures requires us to make estimates and
assumptions that affect the reported amount of assets, liabilities, revenue,
costs and expenses, and related disclosures. We believe that the estimates and
assumptions involved in the accounting policies described below may have the
greatest potential impact on our consolidated financial statements and,
therefore, consider these to be our critical accounting policies. We evaluate
our estimates and assumptions on an ongoing basis. Our actual results may differ
from these estimates under different assumptions and conditions. While our
significant accounting policies are described in more detail in the notes to our
consolidated financial statements appearing elsewhere in this Annual Report, we
believe that the following accounting policies are those most critical to the
judgments and estimates used in the preparation of our consolidated financial
statements.

Revenue Recognition

We generate revenue from the sale of our product, ZULRESSO, which was approved
by the FDA in March 2019 and we subsequently began selling in June 2019, and
from collaboration and supply agreements with our collaborators. To date,
revenue from our collaboration agreements has come from initial, upfront
consideration allocated to licenses of intellectual property, and from the
supply of material for clinical trials under a supply agreement.



Under Accounting Standards Codification, or ASC, Topic 606, "Revenue from
Contracts with Customers", or Topic 606, an entity recognizes revenue when its
customer obtains control of promised goods or services, in an amount that
reflects the consideration that the entity expects to receive in exchange for
those goods or services. To determine revenue recognition for arrangements that
an entity determines are within the scope of Topic 606, the entity performs the
following five steps: (i) identify the contract(s) with a customer; (ii)
identify the performance obligations in the contract; (iii) determine the
transaction price, including variable consideration, if any; (iv) allocate the
transaction price to the performance obligations in the contract; and (v)
recognize revenue when (or as) the entity satisfies a performance obligation.
Arrangements that include rights to additional goods or services that are
exercisable at a customer's discretion are generally considered options. We
assess if these options provide a material right to the customer and if so, they
are considered performance obligations. The exercise of a material right may be
accounted for as a contract modification or as a continuation of the contract
for accounting purposes.



For contracts determined to be within the scope of Topic 606, we assess whether
the goods or services promised within each contract are distinct to identify
those that are performance obligations. This assessment involves subjective
determinations and requires management to make judgments about the individual
promised goods or services and whether such are separable from the other aspects
of the contractual relationship. Promised goods and services are considered
distinct provided that: (i) the customer can benefit from the good or service
either on its own or together with other resources that are readily available to
the customer and (ii) the entity's promise to transfer the good or service to
the customer is separately identifiable from other promises in the contract.



We allocate the transaction price (the amount of consideration we expect to be
entitled to from a customer in exchange for the promised goods or services) to
each performance obligation and recognize the associated revenue when (or as)
each performance obligation is satisfied. Our estimate of the transaction price
for each contract includes all variable consideration to which we expect to be
entitled.

Collaboration and license revenue



In assessing whether a promised good or service is distinct in the evaluation of
a collaboration or license arrangement subject to Topic 606, we consider factors
such as the research, manufacturing and commercialization capabilities of the
collaboration partner and the availability of the associated expertise in the
general marketplace. We also consider the intended benefit of the contract in
assessing whether a promised good or service is separately identifiable from
other promises in the contract. If a promised good or service is not distinct,
we are required to combine that good or service with other promised goods or
services until we identify a bundle of goods or services that is distinct.

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The transaction price is then determined and allocated to the identified
performance obligations in proportion to their standalone selling prices, or
SSP, on a relative SSP basis. SSP is determined at contract inception and is not
updated to reflect changes between contract inception and when the performance
obligations are satisfied. Determining the SSP for performance obligations
requires significant judgment. In developing the SSP for a performance
obligation, we consider applicable market conditions and relevant
entity-specific factors, including factors that were contemplated in negotiating
the agreement with the customer and estimated costs. In certain circumstances,
we may apply the residual method to determine the SSP of a good or service if
the standalone selling price is considered highly variable or uncertain. We
validate the SSP for performance obligations by evaluating whether changes in
the key assumptions used to determine the SSP will have a significant effect on
the allocation of arrangement consideration between multiple performance
obligations.



If the consideration promised in a contract includes a variable amount, we
estimate the amount of consideration to which we will be entitled in exchange
for transferring the promised goods or services to a customer. We determine the
amount of variable consideration by using the expected value method or the most
likely amount method. We include the unconstrained amount of estimated variable
consideration in the transaction price. The amount included in the transaction
price is constrained to the amount for which it is probable that a significant
reversal of cumulative revenue recognized will not occur. At the end of each
subsequent reporting period, we re-evaluate the estimated variable consideration
included in the transaction price and any related constraint, and if necessary,
adjust our estimate of the overall transaction price. Any such adjustments are
recorded on a cumulative catch-up basis in the period of adjustment.

If an arrangement includes development and regulatory milestone payments, we
evaluate whether the milestones are considered probable of being reached and
estimate the amount to be included in the transaction price using the most
likely amount method. If it is probable that a significant revenue reversal
would not occur, the associated milestone value is included in the transaction
price. Milestone payments that are not within our control or the licensee's
control, such as regulatory approvals, are generally not considered probable of
being achieved until those approvals are received.

In determining the transaction price, we adjust consideration for the effects of
the time value of money if the timing of payments provides us with a significant
benefit of financing. We do not assess whether a contract has a significant
financing component if the expectation at contract inception is such that the
period between payment by the licensees and the transfer of the promised goods
or services to the licensees will be one year or less. We assessed our
arrangements with Shionogi and Biogen and concluded that a significant financing
component does not exist in either arrangement. For arrangements with licenses
of intellectual property that include sales-based royalties, including milestone
payments based on the level of sales, and the license is deemed to be the
predominant item to which the royalties relate, we recognize royalty revenue and
sales-based milestones at the later of (i) when the related sales occur, or (ii)
when the performance obligation to which the royalty has been allocated has been
satisfied.

We then recognize as revenue the amount of the transaction price that is
allocated to the respective performance obligation when (or as) each performance
obligation is satisfied at a point in time or over time, and if over time this
is based on the use of an output or input method. Revenue from our collaboration
agreement with Shionogi has come from initial, upfront consideration that was
allocated to the license of zuranolone and for the supply of drug product for
Shionogi clinical trials. Revenue from our collaboration agreement with Biogen
has come from initial, upfront consideration that was allocated to the licenses
for the Licensed 217 Products and the Licensed 324 Products. For additional
information, refer to Note 6, Collaboration Agreements, to our consolidated
financial statements appearing elsewhere in this Annual Report.

Product revenue



We recognize product revenues, net of variable consideration related to certain
allowances and accruals that are determined using the expected value method, in
our consolidated financial statements at the point in time when control
transfers to the customer, which is typically when the product has been
delivered to the customer's location. The amount included in the transaction
price is constrained to the amount for which it is probable that a significant
reversal of cumulative revenue recognized will not occur. Our only performance
obligation identified for ZULRESSO is to deliver the product to the location
specified by the customer's order. We record shipping and handling costs
associated with delivery of product to our customers within selling, general and
administrative expenses on our consolidated statements of operations and
comprehensive income (loss). We expense incremental costs of obtaining a
contract as incurred if the

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expected amortization period of the asset would be less than one year. If we
were to incur incremental costs with an amortization period greater than a year,
such costs would be capitalized as contract assets, as they are expected to be
recovered, and would be expensed by amortizing on a systematic basis that is
consistent with the transfer to the customer of the goods or services to which
the asset relates. We did not have any contract assets (unbilled receivables) at
December 31, 2020, as customer invoicing generally occurs before or at the time
of revenue recognition. We did not have any contract liabilities at December 31,
2020, as we did not receive any payments in advance of satisfying our
performance obligations to our customers. Amounts billed or invoiced are
included in prepaid expenses and other current assets on the consolidated
balance sheets.



We record reserves, based on contractual terms, for the following components of
variable consideration related to product sold during the reporting period, as
well as our estimate of product that remains in the distribution channel
inventory of our customers at the end of the reporting period. On a quarterly
basis, we will update our estimates and record any necessary material
adjustments in the period they are identified.



Chargebacks: We estimate chargebacks from our customers who directly purchase
the product from us for discounts resulting from contractual commitments to sell
products to eligible healthcare settings at prices lower than the list prices
charged to our customers. Customers charge us for the difference between what
they pay to us for the product and the selling price to the eligible healthcare
settings. Reserves for chargebacks consist of credits that we expect to issue
for units that remain in the distribution channel inventories at the end of each
reporting period that we expect will be sold to eligible healthcare settings,
and chargebacks that customers have claimed, but for which we have not yet
issued a credit.



Government Rebates: We are subject to discount obligations under government
programs, including Medicaid. We record reserves for rebates in the same period
the related product revenue is recognized, resulting in a reduction of ZULRESSO
product revenues and a current liability that is included in accrued expenses on
our consolidated balance sheets. Our liability for these rebates consists of
invoices received for claims from prior quarters that have not been paid or for
which an invoice has not yet been received, estimates of claims for the current
quarter, and estimates of future claims that will be made for product that has
been recognized as revenue, but which remains in the distribution channel at the
end of each reporting period.



Trade Discounts and Allowances: We generally provide customary invoice discounts
on ZULRESSO sales to our customers for prompt payment and we pay fees for sales
order management, data, and distribution services. We estimate our customers
will earn these discounts and fees and deduct these discounts and fees in full
from gross ZULRESSO revenues and accounts receivable at the time we recognize
the related revenues.



Financial Assistance: We provide voluntary financial assistance programs to
patients with commercial insurance that have coverage and reside in states that
allow financial assistance. We estimate the financial assistance amounts for
ZULRESSO and record any such amounts within accrued expenses on the consolidated
balance sheets. The calculation of the accrual for financial assistance is based
on an estimate of claims and the cost per claim that the we expect to receive
using demographics for patients who have registered and been approved for
assistance. Any adjustments are recorded in the same period the
related revenue is recognized, resulting in a reduction of product revenue and
the establishment of a current liability, which is included as a component of
accrued expenses on the consolidated balance sheets.



Product Returns: Consistent with industry practice, we offer product return
rights to direct customers for damaged, defective or expiring product, provided
it is within a specified period around the product expiration date as set forth
in our return goods policy. We estimate the amount of our product sales that may
be returned by our customers and record this estimate as a reduction
of revenue in the period the related product revenue is recognized, as well as a
reserve within accrued expenses on our consolidated balance sheets. We have
experienced no product returns to date. We will update our estimated refund
liability, on at least a quarterly basis, based on actual shipments of ZULRESSO
subject to contractual return rights, changes in expectations about the amount
of estimated refunds or actual returns.



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Collaborative arrangements



We analyze our collaboration arrangements to assess whether such arrangements
involve joint operating activities performed by parties that are both active
participants in the activities and exposed to significant risks and rewards
dependent on the commercial success of such activities and therefore within the
scope of ASC Topic 808, Collaborative Arrangements, or Topic 808. This
assessment is performed throughout the life of the arrangement based on changes
in the responsibilities of all parties in the arrangement. For collaboration
arrangements within the scope of Topic 808 that contain multiple elements, we
first determine which elements of the collaboration are deemed to be within the
scope of Topic 808 and which elements of the collaboration are more reflective
of a vendor-customer relationship and therefore within the scope of Topic 606.
For elements of collaboration arrangements that are accounted for pursuant to
Topic 808, an appropriate recognition method is determined and applied
consistently, either by analogy to authoritative accounting literature or by
applying a reasonable and rational policy election. For those elements of the
arrangement that are accounted for pursuant to Topic 606, we apply the five-step
model described above.

Accrued Research and Development Expenses



As part of the process of preparing our consolidated financial statements, we
are required to estimate our accrued research and development expenses. This
process involves reviewing open contracts and purchase orders, communicating
with our personnel and vendors to identify services that have been performed on
our behalf and estimating the level of service performed and the associated
costs incurred for the services when we have not yet been invoiced or otherwise
notified of the actual costs. The majority of our service providers invoice us
in arrears for services performed, on a pre-determined schedule or when
contractual milestones are met; however, some require advance payments. We make
estimates of our accrued expenses as of each balance sheet date in our
consolidated financial statements based on facts and circumstances known to us
at that time. Examples of estimated accrued research and development expenses
include fees paid to:

• CROs in connection with performing research and development services on


        our behalf;


  • other providers in connection with clinical trials;


  • vendors in connection with non-clinical development activities; and

• vendors related to product manufacturing, development and distribution of

clinical supplies.




We base our expenses related to clinical trials on our estimates of the services
received and efforts expended pursuant to contracts with multiple CROs that
conduct and manage clinical trials on our behalf. The financial terms of these
agreements vary from contract to contract and may result in uneven payment
flows. There may be instances in which payments made to our vendors will exceed
the level of services provided and result in a prepayment of the clinical
expense. Payments under some of these contracts depend on factors such as the
successful enrollment of patients and the completion of clinical trial
milestones. When determining accruals, we estimate the time period over which
services will be performed, enrollment of patients, number of sites activated
and level of effort to be expended in each period. If the actual timing of the
performance of services or the level of effort varies from our estimate, we
adjust the accrual or prepaid accordingly. Although we do not expect our
estimates to be materially different from amounts actually incurred, our
understanding of the status and timing of services performed relative to the
actual status and timing of services performed may vary and may result in
reporting expenses that are too high or too low in any particular period. To
date, we have not made any material adjustments to our prior estimates of
accrued research and development expenses.

Stock-Based Compensation



We recognize compensation expense for stock-based awards, including grants of
stock options and restricted stock units, made to employees and non-employee
directors based on the estimated fair value on the date of grant, over the
requisite service period. We recognize stock-based compensation expense for only
the portion of awards that are expected to vest.

For awards that vest upon achievement of a performance condition, we recognize
compensation expense when achievement of the performance condition is met or
during the period from which meeting the condition is deemed probable until the
expected date of meeting the performance condition.

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We have historically granted stock options with exercise prices equivalent to
the fair value of our common stock as of the date of grant. For grants of
restricted stock units, we base the fair value on the stock price as of the date
of grant. Prior to January 1, 2019, the majority of our grants were stock
options. Effective January 1, 2019, for grants to employees, we began to grant a
mix of stock options and restricted stock units.

Effective January 1, 2019, we recognize compensation expense for stock-based
awards made to non-employee consultants based on the estimated fair value on the
date of grant, over the requisite service period. Through December 31, 2018, we
recognized compensation expense for stock-based awards granted to non-employee
consultants based on the fair value of the awards on each date on which the
awards vest. Compensation expense was recognized over the vesting period,
provided that services were rendered by such non-employee consultants during
that time. At the end of each financial reporting period, the fair value of
unvested options was re-measured using the then-current fair value of our common
stock and updated assumptions using the Black-Scholes option-pricing model.

The fair value of each option grant is estimated using the Black-Scholes
option-pricing model. For the years ended December 31, 2019 and 2018, we
estimated our expected volatility using a weighted average of the historical
volatility of publicly-traded peer companies and the volatility of our common
stock. Effective January 1, 2020, the Company began using the historical
volatility of only our common stock, as there is adequate historical data for
the duration of the expected term.

The expected term of the options granted to employees and non-employee directors
by us has been determined utilizing the "simplified" method for awards that
qualify as "plain-vanilla" options. Through December 31, 2018, the expected term
of our options granted to non-employee consultants was determined based on the
contractual term of the options, and since January 1, 2019, the "simplified"
method has been used. The risk-free interest rate is determined by reference to
the U.S. Treasury yield curve in effect at the time of grant of the award for
time periods approximately equal to the expected term of the award. The expected
dividend yield is based on the fact that we have never paid cash dividends and
do not expect to pay any cash dividends in the foreseeable future.

The fair value of each stock option granted under our equity plans has been
calculated on the date of grant using the following weighted average
assumptions:



                                     Year Ended December 31,
                              2020             2019             2018
Expected dividend yield              0 %              0 %              0 %
Expected volatility              77.86 %          71.34 %          74.45 %
Risk-free interest rate           0.97 %           2.21 %           2.68 %
Expected term               5.98 years       6.05 years       6.04 years




These assumptions represented our best estimates, but the estimates involve
inherent uncertainties and the application of our judgment. As a result, if
factors change and we use significantly different assumptions or estimates when
valuing our stock options, our stock-based compensation expense could be
materially different. In developing a forfeiture rate estimate for pre-vesting
forfeitures, we have considered our historical experience of actual forfeitures.
If our future actual forfeiture rate is materially different from our estimate,
our stock-based compensation expense could be significantly different from what
we have recognized in the current period.



At December 31, 2020, we had unrecognized stock-based compensation expense
related to our unvested time-based stock option awards of $120.5 million, which
is expected to be recognized over the remaining weighted average vesting period
of 1.76 years.


At December 31, 2020, 288,575 performance-based stock options were both outstanding and unvested, and the total unrecognized stock-based compensation expense related to those awards was $20.6 million.





At December 31, 2020, 957,695 restricted stock units were both outstanding and
unvested, and the total unrecognized stock-based compensation expense related to
those awards was $58.2 million.

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Recently Issued Accounting Pronouncements



A description of recently issued accounting pronouncements that may potentially
impact our financial position and results of operations is set forth in Note 2,
Summary of Significant Accounting Policies, to the consolidated financial
statements appearing elsewhere in this Annual Report.

Results of Operations

Comparison of the Years Ended December 31, 2020 and 2019





The following table summarizes our results of operations for the years ended
December 31, 2020 and 2019:



                                        Year Ended December 31,         Increase
                                          2020             2019        (Decrease)
                                                     (in thousands)
Product revenue, net                  $       6,700     $    3,957     $     2,743
Collaboration revenue                     1,107,500          2,911       1,104,589
Total revenue                             1,114,200          6,868       1,107,332
Operating costs and expenses:
Cost of goods sold                              565            400          

165


Research and development                    292,714        368,815         (76,101 )
Selling, general and administrative         196,952        345,777        (148,825 )
Restructuring                                27,743              -          

27,743


Total operating costs and expenses          517,974        714,992        (197,018 )
Income (loss) from operations               596,226       (708,124 )     1,304,350
Interest income, net                          9,597         27,804         (18,207 )
Other income, net                               250             82             168
Net income (loss)                     $     606,073     $ (680,238 )   $ 1,286,311




Product revenue, net


During the years ended December 31, 2020 and 2019, we recognized $6.7 million and $4.0 million, respectively, of net product revenues related to sales of ZULRESSO. Sales allowances and accruals consisted of patient financial assistance, distribution fees, discounts, and chargebacks.





Collaboration revenue



During the year ended December 31, 2020, we recognized collaboration revenue of
$1.1 billion related to the execution of the Biogen Collaboration Agreement and
the Biogen stock purchase agreement. The revenue consisted of an upfront payment
of $875.0 million plus $232.5 million in excess proceeds from the equity
investment under the stock purchase agreement that was allocated to the licenses
for the Licensed 217 Products and the Licensed 324 Products delivered to Biogen
in December 2020.



During the year ended December 31, 2020, we recognized no collaboration revenue
from our agreement with Shionogi. During the year ended December 31, 2019, we
recognized $2.9 million in collaboration revenue from our agreement with
Shionogi related to the supply of zuranolone API for clinical development.



We expect that revenue, if any, that we may generate under our collaboration
agreements will fluctuate from quarter to quarter as a result of the timing and
amount of license fees, payments for clinical materials or manufacturing
services, milestone payments, royalties paid to us and our share of
collaboration profits or losses resulting from sales of any commercialized
products, and other payments.



For further discussion regarding our collaboration agreements with Biogen and
Shionogi and the accounting for revenue from collaboration agreements, refer to
Note 6, Collaboration Agreements appearing elsewhere and Note 2,

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Summary of Significant Accounting Policies in the Notes to Consolidated Financial Statements, appearing elsewhere in this Annual Report.





Cost of goods sold



During the years ended December 31, 2020 and 2019, cost of goods sold was $0.6
million and $0.4 million, respectively, and is made up of a low-single digit
royalty cost on net product revenue to CyDex Pharmaceuticals, Inc. and The
Regents of the University of California, or the Regents, the amortization of
intangible assets associated with ZULRESSO and third-party manufacturing and
distribution costs associated with labeling, packaging, and shipping of
ZULRESSO. Prior to receiving initial FDA approval for ZULRESSO on March 19,
2019, we manufactured ZULRESSO inventory to be sold upon commercialization and
recorded approximately $8.9 million related to this inventory build-up as
research and development expense. As a result, the manufacturing costs related
to the ZULRESSO inventory build-up incurred before FDA approval were already
expensed in a prior period and are therefore excluded from the cost of goods
sold for the years ended December 31, 2020 and 2019. We estimate that our cost
of goods sold as a percentage of net product revenue will remain in the
mid-single digit percentage range for the foreseeable future. We expect to
utilize zero-cost inventory with respect to ZULRESSO for an extended period of
time.


Research and development expenses





                                            Year Ended December 31,          Increase
                                              2020             2019         (Decrease)
                                                         (in thousands)
zuranolone (SAGE-217)                     $    116,614       $ 146,819     $    (30,205 )
SAGE-324                                        19,482          21,449           (1,967 )
SAGE-718                                         6,388          11,887           (5,499 )
Other research and development programs         38,222          53,267          (15,045 )
Unallocated expenses                            69,638          72,462           (2,824 )
Stock-based compensation                        42,370          62,931     

(20,561 ) Total research and development expenses $ 292,714 $ 368,815 $ (76,101 )

Research and development expenses for the year ended December 31, 2020 were $292.7 million, compared to $368.8 million for the year ended December 31, 2019. The decrease of $76.1 million was primarily due to the following:

• a decrease of $30.2 million in expenses for zuranolone, primarily as a

result of completion of the MOUNTAIN Study and decreased spending for

clinical pharmacology studies, partially offset by an increase in spending


        for the WATERFALL Study and the SKYLARK Study;



• a decrease of $2.0 million in expenses for SAGE-324, primarily due to the


        completion of Phase 1 clinical trials while the initiation of Phase 2
        clinical trials did not occur until mid- to late 2020;



• a decrease of $5.5 million in expenses for SAGE-718, primarily due to the


        completion of Phase 1 clinical trials in 2019 while the initiation of
        Phase 2 clinical trials did not occur until mid- to late 2020;



• a decrease of $15.0 million in expenses for other research and development

programs, related to a decrease in spending on non-clinical studies; and

• a decrease of $20.6 million in non-cash stock-based compensation expense.

There was no non-cash stock-based compensation expense recognized related

to the achievement of performance-based vesting criteria during the year

ended December 31, 2020. The amount of non-cash stock-based compensation

expense related to the achievement of performance-based vesting criteria

was $14.0 million for the year ended December 31, 2019. The remainder of


        the decrease is primarily from the impact of the cancellation of option
        grants that had been made to terminated employees, including those
        terminated in the April 2020 restructuring.


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Selling, general and administrative expenses





                                                        Year Ended December 31,         Increase
                                                         2020              2019        (Decrease)
                                                                    (in thousands)
Personnel-related                                    $     58,403       $  122,857     $   (64,454 )
Stock-based compensation                                   51,836           90,300         (38,464 )
Professional fees                                          50,533           76,594         (26,061 )
Other                                                      36,180          

56,026 (19,846 ) Total selling, general and administrative expenses $ 196,952 $ 345,777 $ (148,825 )






Selling, general and administrative expenses for the years ended December 31,
2020 and 2019 were $197.0 million and $345.8 million, respectively. The decrease
of $148.8 million was primarily due to the following:



• a decrease of $64.5 million in personnel-related costs, mainly as a result


        of the termination of employees in the April 2020 restructuring;




    •   a decrease of $38.5 million in non-cash stock-based compensation expense.

There was no non-cash stock-based compensation expense recognized related

to the achievement of performance-based vesting criteria during the year

ended December 31, 2020. The amount of non-cash stock-based compensation

expense related to the achievement of performance-based vesting criteria

was $13.2 million during the year ended December 31, 2019. The remainder

of the decrease is primarily from the impact of the cancellation of option


        grants that had been made to terminated employees, including those
        terminated in the April 2020 restructuring;



• a decrease of $26.1 million in professional fees, primarily due to costs

incurred in the year ended December 31, 2019, related to preparations for

the commercial launch of ZULRESSO in the U.S. in June 2019 and the impact

of the April 2020 restructuring on our spending for commercial activities;


        and



• a decrease of $19.8 million in other costs, primarily due to the impact of

the April 2020 restructuring and the impact of the COVID-19 pandemic

resulting in our employees working remotely and a reduction in business


        travel.




Restructuring

In April 2020, we announced a restructuring plan to enable us to advance our
corporate strategy and pipeline that included the elimination of approximately
53% of our workforce. The workforce reduction primarily affected the ZULRESSO
commercial operation and related selling, general and administrative support
functions. In the year ended December 31, 2020, we recorded $27.7 million of
expense for restructuring, primarily for one-time termination benefits to the
affected employees, primarily for cash payments of severance, healthcare
benefits and outplacement assistance.

Interest income, net and Other income, net





Interest income, net, and other income, net, for the years ended December 31,
2020 and 2019 were $9.8 million and $27.9 million, respectively. The primary
reason for the decrease was the decrease in the balance of marketable
securities, along with a reduction in interest rates. The payments of $1.5
billion that were received from Biogen on December 31, 2020, $875.0 million of
which was an upfront payment and $650.0 of which was received in exchange for
shares of our common stock, were in cash and cash equivalents in the balance
sheet as of December 31, 2020.



Liquidity and Capital Resources





Prior to the second quarter of 2019, we had not generated revenue from product
sales. We began to generate revenue from product sales in the second quarter of
2019 in conjunction with the launch of our first product, ZULRESSO, in June
2019. Prior to the second quarter of 2019, all of our revenue had been derived
from our collaboration with Shionogi. To date, we have incurred recurring net
losses, except for net income of $606.1 million for the year ended December 31,
2020, because of revenue recognized under a license and collaboration agreement
with Biogen. As of

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December 31, 2020, we had an accumulated deficit of $1.0 billion. From our
inception through December 31, 2020, we have received aggregate net proceeds of
$2.8 billion from the sales of redeemable convertible preferred stock prior to
our initial public offering, the issuance of convertible notes, and the sales of
common stock in our initial public offering in July 2014, follow-on offerings
and the sale of stock to Biogen. We also received $1.0 billion in upfront
payments under our collaborations with Biogen and Shionogi.

On February 27, 2019, we completed the sale of 3,833,334 shares of our common
stock in a follow-on underwritten public offering at a price to the public of
$150.00 per share, resulting in net proceeds of $560.9 million after deducting
commissions and underwriting discounts and offering costs paid by us.

As described below, on December 31, 2020, we completed the sale of 6,241,473
shares of our common stock in a private placement to Biogen at a price to the
public of approximately $104.14 per share, resulting in aggregate gross proceeds
of $650.0 million.

As of December 31, 2020, our primary sources of liquidity were our cash, cash
equivalents and marketable securities, which totaled $2.1 billion. We invest our
cash in money market funds, U.S. government securities, corporate bonds and
commercial paper, and our primary objectives are to preserve principal, provide
liquidity and maximize income without significantly increasing risk.



The following table summarizes the primary sources and uses of cash for the years ended December 31, 2020 and 2019:





                                    Year Ended December 31,
                                      2020             2019
                                         (in thousands)
Net cash provided by (used in):
Operating activities              $     664,280     $ (528,706 )
Investing activities                    442,684       (143,156 )
Financing activities                    426,762        607,624
Total                             $   1,533,726     $  (64,238 )




Operating Activities



During the year ended December 31, 2020, net cash used in operating activities
primarily resulted from our net income of $606.1 million, which was primarily
attributable to collaboration revenue from our collaboration with Biogen,
partially offset by our research and development activities and our selling,
general and administrative expenses, along with changes in our operating assets
and liabilities of $39.7 million, partially offset by $97.9 million of non-cash
items. During the year ended December 31, 2019, net cash used in operating
activities primarily resulted from our net loss of $680.2 million, which was
primarily attributable to our research and development activities and our
selling, general and administrative expenses, partially offset by changes in our
operating assets and liabilities of $6.7 million and $144.9 million of non-cash
items.

Investing Activities



During the years ended December 31, 2020 and 2019, net cash provided by
investing activities was $442.7 million and net cash used in investing
activities was $143.2 million, respectively. During the years ended December 31,
2020 and 2019, we purchased marketable securities and had sales and maturities
of our marketable securities as part of managing our cash and investments
portfolio.

Financing Activities



During the years ended December 31, 2020 and 2019, net cash provided by
financing activities was $426.8 million and $607.6 million, respectively. During
the year ended December 31, 2020, we received $650.0 million of proceeds from
our sale of 6,241,473 shares of our common stock to Biogen under the stock
purchase agreement, of which $417.5 million

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was recorded as equity and the remainder was recorded as revenue. During the
year ended December 31, 2019, we received $560.9 million of net proceeds from
our follow-on underwritten public offering, after deducting commissions and
underwriting discounts and offering costs paid by us.

Operating Capital Requirements



We began to generate revenue from product sales in the second quarter of 2019 in
conjunction with the launch of our first product, ZULRESSO. We anticipate that
we will continue to generate losses for the foreseeable future, and we expect
the losses to increase as we continue the development of our current and future
product candidates, and seek regulatory approvals for those product candidates
that are successfully developed; prepare for potential future commercialization
of product candidates beyond ZULRESSO that are successfully developed and
approved; begin to commercialize any such products, if successfully developed
and approved; and continue our efforts to identify and develop new product
candidates beyond our current portfolio. We also expect to incur significant
costs associated with general operations. In addition, we expect to incur
significant commercialization expenses for product sales, marketing and
outsourced manufacturing with respect to ZULRESSO and any future products that
are successfully developed and approved. Accordingly, we anticipate that we will
need substantial additional funding in connection with our continuing
operations.

Based on our current operating plans, we expect that our existing cash, cash
equivalents and marketable securities as of December 31, 2020, will enable us to
fund our operating expenses and capital expenditure requirements for at least
the next 12 months from the filing date of this Annual Report. During that time,
we expect to incur significant expenses as we continue to develop and
commercialize our product and product candidates and pursue our strategic plan.

Our current operating plan does not contemplate other development activities
that we may pursue or that all of our currently planned activities will proceed
at the same pace, or that all of these activities will be fully initiated or
completed during that time. We have based our estimates on assumptions that
could change, and we may use our available capital resources sooner than we
currently expect. We may also choose to change or increase our development,
commercialization or other efforts. Because of the numerous risks and
uncertainties associated with the development and commercialization of any
product or product candidates, we are unable to estimate the amounts of
increased capital outlays and operating expenditures necessary to complete
development of our current or future product candidates or to commercialize any
approved product.

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

• the amount and timing of revenues from sales of ZULRESSO, which will be

impacted by a number of factors, including: the rate, degree and level of

market acceptance for ZULRESSO for the treatment of PPD in the U.S.; the


        impact of our April 2020 restructuring and the decision to focus our
        efforts primarily on geographies in the U.S. that have existing, active

ZULRESSO treating sites; the continued availability of healthcare settings

in those geographies to administer ZULRESSO and the ability and

willingness of such healthcare settings to make sufficient capacity

available; the level of reimbursement for both ZULRESSO and the infusion


        in the healthcare setting both by commercial and government payors, and
        the nature of limitations on coverage and reimbursement; the number of

healthcare professionals willing to prescribe ZULRESSO and women with PPD

who agree to be treated with ZULRESSO; and the scope, duration and timing


        of the impact of the COVID-19 pandemic;



• the timing and amount of costs associated with our commercialization of


        ZULRESSO;




    •   the initiation, progress, timing, costs, and results of ongoing, planned

and future non-clinical studies and clinical trials for zuranolone and our

other existing and future product candidates; the number and length of

clinical trials required by regulatory authorities to support regulatory


        approval; and the costs of preparing regulatory filings;




    •   the length, severity and costs of disruptions, if any, associated with the

        COVID-19 pandemic on initiation and conduct of our clinical trials;


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• the ability of zuranolone, SAGE-324, SAGE-718 and our other clinical-stage

product candidates to progress through clinical development successfully;

the timing, scope and outcome of regulatory filings, reviews and approvals

of such product candidates, if we are successful in our development

efforts; the scope and cost of any clinical trials or other commitments

required post-approval for any approved products resulting from such

development efforts, if successful; and the level, timing and amount of

costs associated with permitted prelaunch activities and preparing for a

potential future commercial launch of any such product candidate that is


        successfully developed and approved;




    •   the amounts we are entitled to receive, if any, from Biogen and Shionogi

        under our collaborations for cost-sharing, development, regulatory, and
        sales milestones, and royalty payments;



• the size of the PPD market and the portion of the population for which

ZULRESSO may be prescribed; the size of the markets for which zuranolone

and our other product candidates may be approved in the future, if

successfully developed; the portion of the population in the approved

indications for which our future products are actually prescribed; the

rate and degree of market acceptance for our products, and the pricing,


        availability and level of reimbursement for our products;



• the number and characteristics of the product candidates we pursue in

development and the nature and scope of our discovery and development


        programs;



• the costs of preparing, filing and prosecuting patent applications,

maintaining and enforcing our intellectual property rights and defending


        intellectual property-related claims;




    •   the extent to which we acquire or in-license other products and
        technologies; and




    •   our ability to establish any future collaboration arrangements on
        favorable terms, if at all.




Until such time, if ever, as we can generate substantial product revenue and
achieve profitability, we expect to also finance our cash needs through a
combination of equity offerings, debt financings, collaborations, strategic
alliances, licensing arrangements and other sources of funding. Even if we
believe we have sufficient funds for our current or future operating plans, we
may seek additional capital if market conditions are favorable or in light of
other strategic considerations. To the extent that we raise additional capital
through the sale of equity or convertible debt securities, the ownership
interest of our stockholders 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 and may require the issuance of warrants, which could
potentially dilute the ownership interest of our stockholders. If we raise
additional funds through collaborations, strategic alliances or licensing
arrangements with third parties, we may have to relinquish valuable rights to
our technologies, future revenue streams or research programs or to grant
licenses on terms that may not be favorable to us. Raising funds in the current
economic environment may present challenges. The COVID-19 pandemic initially
caused major volatility in the stock market and has caused a significant global
economic downturn. If the economic downturn caused by the pandemic continues for
an extended period or surges in the number of cases of COVID-19 continue or
worsen in the future, or if our business prospects are impaired or the capital
markets disrupted for other reasons, additional capital may not be available to
us on acceptable terms, or at all. If we are unable to raise additional funds
through equity or debt financings or other means when needed, we may be required
to delay, limit, reduce or terminate our product development or future
commercialization efforts or grant rights to develop and market products or
product candidates that we would otherwise prefer to develop and market
ourselves.

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Contractual Obligations and Commitments



The following table summarizes our contractual obligations at December 31, 2020
and the effect such obligations are expected to have on our liquidity and cash
flow in future periods:



                                                               Payments Due by Period
                                                    Less Than                                       More Than
                                       Total         1 Year         1-3 Years       3-5 Years        5 Years
                                                                   (in thousands)
Operating lease commitments(1)        $ 32,225     $     8,662     $    18,003     $     5,560     $          -
Total(1)(2)(3)                        $ 32,225     $     8,662     $    18,003     $     5,560     $          -




Amounts related to contingent milestone payments are not considered contractual
obligations as they are contingent on the successful achievement of certain
milestones. These contingent milestones may not be achieved. We have not
included any of these amounts in the table as we cannot estimate or predict
when, or if, these amounts will become due. We do not include amounts related to
milestones for indications that we are no longer pursuing.



(1) We lease office space in three multi-tenant buildings in Cambridge,

Massachusetts, consisting, as of December 31, 2020, of 63,017 square feet in

the first building under an operating lease that will expire on August 31,

2024, 40,419 square feet in the second building under an operating lease that

will expire on August 31, 2024 and 15,975 square feet in the third building

under an operating lease that will expire on February 29, 2024. We lease

office space in a multi-tenant building in Raleigh, North Carolina,

consisting of 15,525 square feet under an operating lease that will expire on

November 30, 2024. In March 2019, we entered into the Eighth Amendment to the

lease for office space in the first building and thereby increased the amount

of square feet of office space from 58,442 square feet to 63,017 square feet.

The increase of 4,575 square feet began on June 1, 2019. The term for this

additional space will expire on August 31, 2024. Effective February 1, 2021,

we terminated the operating lease for the third building in Cambridge,

Massachusetts. We may lease additional space prior to the expiration of our

leases to meet the needs of the business. The minimum lease payments in the

table do not include related common area maintenance costs or real estate

taxes, because those costs are variable.

(2) We have acquired exclusive and non-exclusive rights to use, research, develop

and offer for sale certain products and patents under license agreements with

Washington University, CyDex Pharmaceuticals, Inc. and two license agreements

with the Regents. The license agreements obligate us to make payments to the

licensors for license fees, milestones, license maintenance fees and

royalties. We are obligated to make future remaining milestone payments under

these agreements of up to an aggregate of $23.9 million upon achieving

certain milestones, related to clinical development, regulatory approvals and


    sales. During the year ended December 31, 2020, we recorded expense and
    accrued expenses of $1.3 million for milestones under these license
    agreements.

(3) We enter into contracts in the normal course of business with CROs for

clinical trials, non-clinical research studies and testing, manufacturing and

other services and products as part of general operations. These contracts


    generally provide for termination upon notice, and we believe that our
    non-cancelable obligations under these agreements are not material.



Off-Balance Sheet Arrangements

We do not currently have, nor did we have during the periods presented, any off-balance sheet arrangements as defined by SEC rules.


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