The following information should be read in conjunction with the condensed consolidated financial information and the notes thereto appearing elsewhere in this Quarterly Report.



This discussion and other parts of this Quarterly Report contain forward-looking
statements that involve risks and uncertainties, such as statements of our
plans, objectives, expectations and intentions. As a result of many factors,
including those factors set forth in our Annual Report, our actual results could
differ materially from the results described in or implied by the
forward-looking statements contained in the following discussion and analysis.

Overview



Our mission is to one day end the suffering caused by neurodegenerative
diseases. Unlike most other cells in the body that regularly die and are
replaced as part of healthy function, mature neurons are normally resistant to
cell death and generally cannot regenerate. We believe AMX0035 is the first drug
candidate to show both a functional and survival benefit in a large-scale
clinical trial of patients with amyotrophic lateral sclerosis, or ALS. In
September 2022, the U.S. Food and Drug Administration, or FDA, approved AMX0035,
known as RELYVRIO in the United States, or U.S., for the treatment of ALS in
adults, and commenced U.S. commercial sales of RELYVRIO in the fourth quarter of
2022. AMX0035 received marketing authorization with conditions as ALBRIOZA by
Health Canada for the treatment of ALS in June 2022, and we commenced Canadian
commercial sales of ALBRIOZA in the third quarter of 2022. We submitted a
Marketing Authorization Application, or MAA, to the European Medicines Agency,
or EMA, in Europe in the first quarter of 2022, which was validated in the same
quarter. The results of our Phase 2 clinical trial of AMX0035, known as the
CENTAUR trial, were published in September 2020 in the New England Journal of
Medicine and in October 2020 in the Journal of Muscle and Nerve and demonstrated
functional and survival benefits for ALS patients. We believe AMX0035 has the
potential to be a foundational therapy, meaning that it could be used alone or
in conjunction with other therapies to change the treatment paradigm across a
broad range of neurodegenerative diseases.

AMX0035 is a dual UPR-Bax apoptosis inhibitor composed of PB and TURSO (also
known as TUDCA). Through the resolution of the UPR and by inhibiting
translocation of the Bax to the outer mitochondrial membrane, we have shown in
multiple models that AMX0035 can keep neurons alive under a variety of different
conditions and stresses, including in in vitro models of neurodegeneration,
endoplasmic reticulum stress, mitochondrial dysfunction, oxidative stress and
disease-specific models of a variety of other conditions, as well as in vivo
models of ALS, Alzheimer's disease, or AD, and multiple sclerosis. We are
pursuing ALS as our first indication as it is a disease of rapid and profound
neurodegeneration, and we are focused on the development and potential
commercialization of AMX0035 for ALS globally.

We have received marketing authorization with conditions by Health Canada for
ALBRIOZA for the treatment of ALS. We announced commercial availability of the
product in July 2022. We have submitted to and received from the national
reimbursement authorities, known as the Canadian Agency for Drugs and
Technologies in Health, or CADTH, and l'Institut national d'excellence en santé
et en services sociaux, or INESSS, recommendations regarding reimbursement for
ALBRIOZA by the Canadian provincial governments, and are actively negotiating
with the provinces and working with private payers in Canada to obtain
reimbursement coverage.

We received approval by the FDA for RELYVRIO in September 2022, and commercial
product was first available in October 2022. We are seeing a solid initial bolus
of demand from physicians as we see an encouraging number of product enrollment
forms and prescriptions coming into our Amylyx Care Team. We cannot yet predict
the extent to which this initial interest will translate into revenue.

We are also actively pursuing regulatory approval of AMX0035 for the treatment
of ALS in Europe. Our MAA remains under review by the Committee for Medicinal
Products for Human Use, or CHMP, of the EMA. We are now in possession of the
Rapporteurs Day 150 Joint Assessment Report, which is provided to applicants as
a reference as the CHMP collects comments to responses made to the Day 120 List
of Questions, which we previously received. While we have resolved several major
objections from the Day 120 List of Questions, some major objections still
remain, and we will work to continue to address them as part of the MAA review
process. The next step in the process is the Day 180 List of Outstanding Issues,
which we will respond to accordingly. On November 9, 2022, the CHMP informed us
that it intends to hold a Scientific Advisory Group of Neurology meeting as part
of the regulatory review process. We expect a decision on our pending MAA in the
first half of next year.

In November 2021, we initiated a Phase 3 clinical trial of AMX0035 for the
treatment of ALS, known as PHOENIX trial, at clinical trial sites in the U.S.
and Europe. Enrollment in the PHOENIX trial was completed in March 2022 in the
U.S. and remains ongoing in Europe. We anticipate topline results from the
PHOENIX trial in 2024. This trial is designed to provide further data

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evaluating the safety and efficacy of AMX0035 for the treatment of ALS to
further support our global regulatory efforts. In July 2022, we announced a
planned open label extension, or OLE, for the PHOENIX trial. In March 2022, we
announced the launch of an expanded access program, or EAP, in the U.S. that the
FDA has authorized for people with ALS who meet eligibility criteria for
participation. The U.S. EAP for AMX0035 was running parallel with the PHOENIX
trial. People living with ALS who are eligible for PHOENIX were not eligible for
the U.S. EAP as the criteria for entry do not overlap. The EAP is being wound
down alongside the commercial launch of RELYVRIO in the U.S.

The FDA approval in September 2022 of AMX0035 as RELYVRIO for the treatment of
ALS in adults was granted following the second virtual meeting of the FDA's
Peripheral and Central Nervous System Drugs Advisory Committee, or the Advisory
Committee, held on September 7, 2022. The Advisory Committee initially met on
March 30, 2022 and voted 4 (yes) and 6 (no) on the question of whether the data
from our randomized, controlled Phase 2 CENTAUR trial and OLE established a
conclusion that AMX0035 is effective in the treatment of patients with ALS. At
the second meeting of the Advisory Committee, the Advisory Committee voted 7
(yes) to 2 (no) in response to the question of whether available evidence of
effectiveness is sufficient to support approval of AMX0035 for the treatment of
ALS, taking into account the unmet need in ALS, the status of the ongoing
PHOENIX trial and the seriousness of ALS. At this meeting and the previous
Advisory Committee meeting, the FDA presented concerns regarding choices of
statistical models for the prespecified primary analysis and the
interpretability of the survival results. In both Advisory Committee meetings,
we presented scientific arguments and analyses, together with experts in the
field, which we believe sufficiently addressed these concerns. At the second
meeting of the Advisory Committee, we stated that if our PHOENIX trial is not
successful then we will do what is right for patients, which includes
voluntarily removing the product from the market. We will work in consultation
with regulatory authorities when the PHOENIX data are available. We could also
be required by regulatory authorities to withdraw AMX0035 from the marketplace.
As a result of the FDA's approval of AMX0035, we launched RELYVRIO in the U.S.
in the fourth quarter of 2022.

We are also developing AMX0035 for other neurodegenerative diseases by
leveraging our deep knowledge of and relationships in the neurodegenerative
space. We believe the approach of a dual UPR-Bax apoptosis inhibitor designed to
help keep neurons alive could be clinically meaningful for the treatment of
other neurodegenerative disease indications in addition to ALS. Many common and
rare neurodegenerative diseases are characterized by substantial neuronal
cellular loss, including AD and Wolfram syndrome, as well as Parkinson's
Disease, Huntington's Disease, Progressive Supranuclear Palsy, Multi-System
Atrophy, and others. We conducted a Phase 2 clinical trial in AD, known as the
PEGASUS trial, to obtain safety data along with initial efficacy and biomarker
data which could help us prioritize additional indications to pursue with
AMX0035. We believe the topline results from the PEGASUS trial, reported in
November 2021, provide further biological knowledge about AMX0035 which will
help inform future clinical development of AMX0035 for the treatment of AD and
in other potential indications. Based on these topline results, AMX0035 met the
PEGASUS trial's primary endpoint of safety and tolerability. The 6-month trial
was not powered to evaluate differences between groups in efficacy outcomes and
no differences were seen in a newly developed composite outcome of cognitive,
functional, and imaging measures, or secondary efficacy endpoints of cognition,
function, and imaging. In this trial, AMX0035 showed significant effects on
biomarkers including neurogranin, YKL-40 or Chitinase 3-like 1 (CHI3L1), and
fatty acid binding protein 3 (FABP3). These results build on previously reported
findings that AMX0035 exhibited significant effects on the tau protein, tau
phosphorylated at threonine 181, 8-hydroxy-2'-deoxyguanosine, or 8-OHdG, and the
amyloid beta 42 to 40 (amyloid-ß1-42, amyloid-ß1-40) ratio in cerebrospinal
fluid. We will continue to evaluate these data and discuss the results of the
PEGASUS trial with scientific advisors as we consider potential next steps for
the development of AMX0035 for the treatment of AD within our clinical
development strategy. Based on preclinical evidence, we are continuing to
evaluate plans to explore the use of AMX0035 in patients with Wolfram syndrome.

We also intend to prioritize our development efforts around neurodegenerative
diseases that result in substantial disability, and ultimately death, and where
unmet medical needs are greatest. For example, we recently presented initial in
vitro data from our new, internally developed compound, AMX0114, targeting
Calpain-2, a critical effector of axonal degeneration.

Since inception in 2013, we have devoted substantially all of our efforts to
research and development and pre-commercialization activities, including
recruiting management and technical staff, raising capital, producing materials
for preclinical and clinical studies, planning for potential commercialization
and building infrastructure to support such activities. Other than RELYVRIO in
the U.S. and ALBRIOZA in Canada, we do not have any products approved for sale
and as of September 30, 2022. As of September 30, 2022, we have funded our
operations primarily through the public offering of our common stock, private
sales of preferred stock, and convertible notes. We have also generated grant
revenues through five grants from ALS Association, ALS Finding a Cure
Foundation, Cure Alzheimer's Fund, Alzheimer's Drug Discovery Foundation and
Alzheimer's Association, or Grantors.

We have incurred operating losses since inception, including a net loss of $155.7 million for the nine months ended September 30, 2022. As of September 30, 2022, we had an accumulated deficit of $311.5 million. These losses have resulted primarily from costs incurred in connection with research and development activities and general and administrative costs associated with our


                                       26
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operations. We expect to incur significant commercialization expenses related to
product sales, marketing, manufacturing and distribution of our approved
products. We may continue to incur significant losses and our financial results
will be highly dependent upon the successful launch of RELYVRIO in the U.S. We
will continue to incur significant expenses as we advance AMX0035 and any future
product candidates through preclinical and clinical development, hire additional
clinical, scientific, management and administrative personnel, seek regulatory
approval and pursue commercialization of any approved product candidates. To
date, we have primarily developed AMX0035 internally, with assistance from our
network of contract research organizations, or CROs, and other advisors. This
has resulted in increased research and development spending but has enabled us
to manage AMX0035 efficiently through the development and manufacturing process.

We also expect to continue to incur additional costs associated with operating
as a public company, including significant legal, accounting, investor relations
and other expenses that we did not incur as a private company. As a result, we
may need substantial additional funding to support our continuing operations and
pursue our growth strategy. Until such time as we can generate significant
revenue from product sales, if ever, we expect to finance our operations through
the sale of equity, debt financings or other capital sources, including
potential collaborations with other companies, royalty financings, or other
strategic transactions. Our inability to raise capital as and when needed could
have a negative impact on our financial condition and ability to pursue our
business strategies. There can be no assurances, however, that our current
operating plan will be achieved or that additional funding, if required, will be
available on terms acceptable to us, or at all.

As of September 30, 2022, we had cash, cash equivalents and short-term
investments of $162.6 million. On October 11, 2022, we completed the sale of
7,697,812 shares of our common stock in an underwritten public offering,
pursuant to which we received net proceeds of approximately $230.8 million,
including exercise in full of the underwriters' option to purchase additional
shares, and after deducting underwriting discounts and commissions and other
offering costs. We believe that our existing cash, cash equivalents and
short-term investments as of September 30, 2022, together with the net proceeds
from our follow-on public offering, and product revenue from RELYVRIO and
ALBRIOZA sales, will be sufficient to meet our anticipated operating and capital
expenditure requirements for at least one year from the date of this filing. We
have based this estimate on assumptions that may prove to be wrong, and we could
exhaust our available capital resources sooner than we expect. See "-Liquidity
and Capital Resources-Funding Requirements" below.

Impact of COVID-19 and Other Macroeconomic Factors



The development of AMX0035 and any future product candidates could be disrupted
and materially adversely affected in the future by COVID-19 pandemic or any
future pandemic or calamity. The spread of COVID-19 and identification of new
variants of the virus has impacted the global economy and our operations,
including requiring us to make certain alterations to our preclinical and
clinical trial activities, such as scheduling certain work off-site and
performing off-site assessments.

If the disruption due to the ongoing COVID-19 pandemic continues, our ongoing
global Phase 3 PHOENIX clinical trial for AMX0035 for the treatment of ALS could
be delayed due to government orders and site policies on account of the
pandemic. Additionally, some patients may be unwilling or unable to travel to
study sites, enroll in our trials or be unable to comply with clinical trial
protocols, which would delay our ability to conduct preclinical studies and
clinical trials or release clinical trial results, as well as delay our ability
to obtain regulatory approval for and commercialize AMX0035. Furthermore, the
COVID-19 pandemic could continue to affect our employees or the employees of
research sites and service providers on whom we rely as well as those of
companies with which we do business, including our suppliers, thereby disrupting
our business operations. Existing or renewed quarantines and travel restrictions
imposed by governments in the jurisdictions in which we and the companies with
which we do business operate could materially impact the ability of employees to
access preclinical and clinical sites, laboratories, manufacturing sites and
offices. We have implemented and continue to follow work-at-home policies and
may experience limitations in employee resources. Our continued reliance on
personnel working from home may negatively impact productivity, or disrupt,
delay or otherwise adversely impact our business.

Economic uncertainty in various global markets, including the U.S. and Europe,
caused by political instability and conflict, such as Russia's invasion of
Ukraine, and economic challenges caused by the COVID-19 pandemic, have led to
market disruptions, including significant volatility in commodity prices, credit
and capital market instability and supply chain interruptions, which have caused
record inflation globally. Our business, financial condition and results of
operations could be materially and adversely affected by further negative impact
on the global economy and capital markets resulting from these global economic
conditions, particularly if such conditions are prolonged or worsen.

Although, to date, our business has not been materially impacted by these global
economic and geopolitical conditions, it is impossible to predict the extent to
which our operations will be impacted in the short and long term, or the ways in
which such instability could impact our business and results of operations. The
extent and duration of these market disruptions, whether as a result

                                       27
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of the military conflict between Russia and Ukraine, geopolitical tensions, record inflation or otherwise, are impossible to predict, but could be substantial. Any such disruptions may also magnify the impact of other risks described in this report.

Components of Our Results of Operations

Product revenue, net



In June 2022, AMX0035 received marketing authorization with conditions as
ALBRIOZA by Health Canada for the treatment of ALS, and we began commercially
selling ALBRIOZA within Canada in July 2022. In September 2022, AMX0035 received
regulatory approval as RELYVRIO by the FDA for the treatment of ALS, and we
launched RELYVRIO in the U.S. in the fourth quarter of 2022. All product revenue
net, recognized during the period relates to units of ALBRIOZA sold in Canada.

Operating Expenses

Cost of Sales

Cost of sales consists primarily of costs associated with the manufacturing of ALBRIOZA and certain period costs, which include:



•
Direct materials costs;

•
Packaging services;

•
Transportation costs;

•
Manufacturing overhead costs;

•
Royalties related to grants provided to us for the purpose of furthering the
research and development of AMX0035 as a therapeutic benefit for ALS disease and
Alzheimer's disease. For additional information refer to Note 13 in the
Condensed Consolidated Financial Statements included in Part I, Item 1 of this
Quarterly Report;

As a result of global macroeconomic conditions, we may experience some
disruption and volatility in our global supply chain network, and we may in the
future experience disruptions in availability and delays in shipments of raw
materials and packaging, as well as related cost inflation.

Research and Development Expenses

Research and development expenses consist primarily of costs incurred in connection with the research and development of AMX0035. We expense research and development costs as incurred. These expenses include:

expenses incurred under agreements with CROs, contract manufacturing organizations, or CMOs, as well as investigative sites and consultants that conduct our clinical trials, preclinical studies and other scientific development services;


manufacturing scale-up expenses and the cost of acquiring and manufacturing drug
product for our preclinical studies and clinical trials, including manufacturing
registration and validation batches, as well as pre-commercial manufacturing
activities;

expenses to acquire technologies to be used in research and development;

employee-related expenses, including salaries, payroll taxes, related benefits and stock-based compensation expense for employees engaged in research and development functions; and

costs related to compliance with quality and regulatory requirements.



Advance payments that we make for goods or services to be received in the future
for use in research and development activities are recorded as prepaid expenses.
Such amounts are recognized as an expense as the goods are delivered or the
related services are performed, or until it is no longer expected that the goods
will be delivered, or the services rendered.

Certain of our indirect research and development expenses are not tracked on an
indication-by-indication basis for AMX0035. We do not allocate employee costs
and facilities, including depreciation or other indirect costs, to specific
indications because these costs are deployed across multiple indications and, as
such, are not separately classified. We use internal resources to oversee the
research and discovery as well as to manage our preclinical development, process
development, manufacturing and

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clinical development activities. These employees work across multiple indications and, therefore, we do not track their costs by indication.



Research and development activities are central to our business model. Product
candidates such as AMX0035 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 and related product manufacturing expenses. We expect that our
research and development expenses will continue to increase substantially in
connection with our planned clinical development activities in the near term and
in the future and to fund commercialization activities in Canada and any other
jurisdictions in which AMX0035 is approved. At this time, we cannot accurately
estimate or know the nature, timing and costs of the efforts that will be
necessary to complete the clinical development of AMX0035 and any future product
candidates. Our clinical development costs may vary significantly based on
factors such as:

•
per patient trial costs;

•

the number of trials required for approval;

the number of sites included in the trials;

the countries in which the trials are conducted;

the length of time required to enroll eligible patients;

the number of patients that participate in the trials;

the number of doses that patients receive;

the drop-out or discontinuation rates of patients;

potential additional safety monitoring requested by regulatory agencies;

the duration of patient participation in the trials and follow-up periods;

the cost and timing of manufacturing our current or future product candidates;

the phase of development of our current or future product candidates;

the efficacy and safety profile from clinical trials and preclinical studies of our current or future product candidates; and

the number of product candidates we are developing.

The successful development and commercialization of AMX0035 and any future product candidates is highly uncertain, due to the numerous risks and uncertainties associated with product development and commercialization, including the following:

the timing and progress of preclinical and clinical development activities;

the number and scope of preclinical and clinical trials for separate indications we decide to pursue;

raising necessary additional funds;

the progress of the development efforts of parties with whom we may enter into collaboration arrangements;

our ability to maintain our current development activities and to establish new ones;

our ability to establish new licensing or collaboration arrangements;

the successful initiation and completion of clinical trials with safety, tolerability and efficacy profiles that are satisfactory to Health Canada, the FDA or the EMA, or any other comparable foreign regulatory authority;


the receipt and related terms of regulatory approvals from applicable regulatory
authorities, including our marketing authorization with conditions from Health
Canada for ALBRIOZA and the post-marketing requirements from the FDA for
RELYVRIO;

the availability of drug substance and drug product for use in production of AMX0035;

establishing and maintaining agreements with third-party manufacturers for clinical supply for our clinical trials and commercial manufacturing;

our ability to obtain and maintain patents, trade secret protection and regulatory exclusivity, both in the U.S. and internationally;


                                       29
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our ability to protect our rights in our intellectual property portfolio;


the commercialization in Canada and the U.S. of AMX0035 (known as ALBRIOZA in
Canada and RELYVRIO in the U.S.) and in other potential jurisdictions, if and
when approved;

obtaining and maintaining third-party insurance coverage and adequate reimbursement;

the acceptance of AMX0035, if approved, by patients, the medical community and third-party payors;

competition with other product; and

a continued acceptable safety profile of our therapies in pre-approval market access programs or in commercial access following approval.



A change in the outcome of any of these variables with respect to the
development of AMX0035 or any future product candidates could have a significant
impact on the cost and timing associated with the development of our product
candidates. We may never succeed in obtaining or maintaining regulatory approval
for AMX0035 or any future product candidates.

Selling, General and Administrative Expenses



Selling, general and administrative expenses consist primarily of salaries and
related costs for personnel in executive, finance, sales, marketing, as well as
administrative functions. Selling, general and administrative expenses also
include legal fees relating to patent and corporate matters; professional fees
for accounting, auditing, tax and administrative consulting services; insurance
costs; administrative travel expenses; sales and marketing expenses; information
technology; facility-related and other operating costs. We anticipate that our
selling, general and administrative expenses will continue to increase in the
future as we further increase our headcount to support our continued research
activities and development of AMX0035 and as we continue to increase headcount
and incur other significant costs related to our pre-commercialization
activities as we prepare for potential near term regulatory approvals. We also
anticipate that we will continue to incur increased accounting, audit, legal,
regulatory, compliance, and director and officer insurance costs as well as
investor and public relations expenses associated with being a public company.
We have received marketing authorization with conditions for ALBRIOZA for the
treatment of ALS in Canada and marketing authorization for RELYVRIO for the
treatment of ALS in adults in the U.S. and are pursuing regulatory approval of
AMX0035 for the treatment of ALS in Europe. As we implement our
commercialization plans in Canada and the U.S. and prepare for a potential
approval in Europe, we have been incurring a substantial increase, and
anticipate further increases in, payroll and expense as a result of our
preparation for commercial operations, especially as it relates to the sales and
marketing of AMX0035.

Other Income (Expense), Net

Interest Income

Interest income consists of interest income earned on our cash and cash equivalents, and short-term investments.

Other (Expense) Income, Net

Other (expense) income, net consists primarily of realized and unrealized gains and losses on foreign exchange transactions.

Change in Fair Value of Convertible Notes



Change in fair value of convertible notes is comprised of adjustments to the
fair value of our 2021 Notes. As permitted under ASC Topic 825, Financial
Instruments (ASC 825), we elected the fair value option to account for our 2021
Notes, and as a result, we measured our 2021 Notes at fair value at each
financial reporting period and immediately before conversion in July 2021. All
changes to the fair value of our 2021 Notes for the nine months ended September
30, 2021 resulted in a loss. Our 2021 Notes converted into shares of Series C-2
redeemable convertible preferred stock concurrently with the issuance of our
Series C-1 redeemable convertible preferred stock. Immediately prior to the
conversion, we determined the fair value of our 2021 Notes based on the fair
value of the Series C-1 redeemable convertible preferred stock and the
conversion price at which these notes converted, which was at 85% of the fair
value of the Series C-1 redeemable convertible preferred stock.

Income Taxes

The provision for income taxes primarily consists of provisions for foreign taxes payable.


                                       30
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Results of Operations

Comparison of the three months ended September 30, 2022 and 2021



The following table summarizes our results of operations for the periods
presented:

                                               Three Months Ended September 30,
                                        2022          2021        $ Change      % Change
                                                 (in thousands)
Revenues:
Product revenue, net                  $     345     $       -     $     345           *NM
Grant revenue                                 -           285          (285 )        (100 )%
Total revenues                              345           285            60            21 %
Operating expenses:
Cost of sales                               172             -           172           *NM
Research and development                 24,914        12,853        12,061            94 %

Selling, general and administrative 29,940 10,350 19,590


          189 %
Total operating expenses                 55,026        23,203        31,823           137 %
Loss from operations                    (54,681 )     (22,918 )     (31,763 )         139 %
Other income (expense), net:
Interest income                             601             3           598        19,933 %
Other income (expense), net                 199          (227 )         426          (188 )%
Other income (expense), net                 800          (224 )       1,024          (457 )%
Loss before income taxes                (53,881 )     (23,142 )     (30,739 )         133 %
Benefit for income taxes                   (125 )           -          (125 )         *NM
Net loss                              $  53,756     $  23,142     $  30,614           132 %




* NM - not meaningful

Product revenue, net

We began commercially selling ALBRIOZA within Canada in July 2022, following
receipt of marketing authorization with conditions by Health Canada. For the
three months ended September 30, 2022, we recorded approximately $0.3 million of
product revenue, net. For further discussion regarding our revenue recognition
policy, see Note 2, Summary of Significant Accounting Policies, in the Notes to
Condensed Consolidated Financial Statements included in Part I, Item 1 of this
Quarterly Report.

Cost of sales

Cost of sales of $0.2 million for the three months ended September 30, 2022,
consisted of costs to procure, manufacture and distribute our marketed product,
ALBRIOZA. In addition, included in cost of sales are costs to manufacture
ALBRIOZA which has been provided to patients at no cost to them while insurance
reimbursement is established. We expect these costs to continue into the fourth
quarter. ALBRIOZA given to patients at no cost to them is not included in
product revenue, net. Based on our policy to expense costs associated with the
manufacture of our products prior to regulatory approval, certain of the costs
of units recognized as revenue during the three months ended September 30, 2022,
or less than $0.1 million, were expensed prior to obtaining regulatory approvals
and, therefore, are not included in cost of sales during this period. We expect
cost of sales to increase and gross margin to decrease as

                                       31
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we deplete these inventories and we expect to use the remaining pre-commercialization inventory for product sales through the third quarter of 2023.

Research and Development Expenses



The following table summarizes our research and development expenses for the
three months ended September 30, 2022 and 2021 (certain prior year amounts have
been reclassified to conform with current year presentation):

                                         Three Months Ended September 30,
                                  2022          2021       $ Change      % Change
                                    (in thousands)
AMX0035 - ALS                   $  16,658     $  6,709     $   9,949           148 %
Payroll and personnel-related       7,503        2,313         5,190           224 %
Other                                 753        3,831        (3,078 )         (80 )%
                                $  24,914     $ 12,853     $  12,061            94 %




Research and development expenses were $24.9 million for the three months ended
September 30, 2022, compared to $12.9 million for the three months ended
September 30, 2021. During these periods, most our research and development
expenses were related to the development of and clinical trials of AMX0035. The
increase of $12.1 million was primarily due to a $9.9 million increase in
spending on AMX0035 for the treatment of ALS, a $5.2 million increase in payroll
and personnel-related costs, and a $3.1 million decrease in all other costs. The
increases in spending on AMX0035 were primarily related to costs associated with
our global Phase 3 PHOENIX trial of AMX0035 in ALS that was initiated in
November 2021 and consulting and manufacturing development expenses in
anticipation of potential commercialization, which includes inventory raw
material purchases made in anticipation of the lead time necessary to have it
available to meet our clinical trial and potential commercialization needs. The
increase in payroll and personnel-related costs was primarily due to an increase
in the number of employees supporting research and development efforts. The
decreases in other costs were primarily due to a decrease in costs associated
with research and development for AMX0035 in other indications, as we focused
our efforts on ALS leading up to our approvals. We expect to increase research
and development for AMX0035 in other indications in future periods.

Selling, General and Administrative Expenses



Selling, general and administrative expenses were $29.9 million for the three
months ended September 30, 2022 compared to $10.4 million for the three months
ended September 30, 2021. The increase of $19.6 million was primarily due to
increases of $14.3 million in payroll and personnel-related costs, including
stock-based compensation, $1.2 million in professional services, $1.3 million in
insurance expense and $1.1 million in facilities and computer-related expenses.
The increase in payroll and personnel-related costs was primarily due to hiring
additional personnel in commercial and general and administrative functions to
support our growth, as well as commercialization and launch preparation
initiatives. The increase in professional services, insurance expenses and
facilities and computer-related expenses were primarily due to an increase in
spending for commercial readiness activities and operations as a public company.

Other Income (Expense), Net

Interest Income

Interest income for the three months ended September 30, 2022 was $0.6 million
compared to less than $0.1 million for the three months ended September 30,
2021. The increase is primarily attributable to higher investment balances
driven by our proceeds received from our January 2022 initial public offering,
resulting in higher interest earned.

Other Income (Expense), Net

Other income (expense), net was $0.2 million for the three months ended September 30, 2022 and 2021. Other income (expense), net in the three months ended September 30, 2022 and 2021 was primarily related to realized and unrealized gains and losses.

Income Taxes



Benefit for income taxes was $0.1 million for the three months ended September
30, 2022 compared to zero for the three months ended September 30, 2021, and
consists of current income tax benefit from activities of our foreign
subsidiaries.

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Comparison of the nine months ended September 30, 2022 and 2021



The following table summarizes our results of operations for the periods
presented:

                                                       Nine Months Ended September 30,
                                               2022          2021         $ Change       % Change
                                                        (in thousands)
Revenues:
Product revenue, net                        $      345     $       -     $      345            *NM
Grant revenue                                        -           285           (285 )         (100 )%
Total revenues                                     345           285             60             21 %
Operating expenses:
Cost of sales                                      172             -            172            *NM
Research and development                        70,637        30,646         39,991            130 %
Selling, general and administrative             86,284        24,012         62,272            259 %
Total operating expenses                       157,093        54,658        102,435            187 %
Loss from operations                          (156,748 )     (54,373 )     (102,375 )          188 %
Other income (expense), net:
Interest income                                  1,134             6          1,128         18,800 %
Change in fair value of convertible notes            -        (5,228 )        5,228           (100 )%
Other income, net                                  138             8            130          1,625 %
Other income (expense), net                      1,272        (5,214 )        6,486           (124 )%
Loss before income taxes                      (155,476 )     (59,587 )      (95,889 )          161 %
Provision for income taxes                         195             -            195            *NM
Net loss                                    $  155,671     $  59,587     $   96,084            161 %


* NM - not meaningful

Product revenue, net

We began commercially selling ALBRIOZA within Canada in July 2022, following
receipt of marketing authorization with conditions by Health Canada. For the
nine months ended September 30, 2022, we recorded approximately $0.3 million of
product revenue, net. For further discussion regarding our revenue recognition
policy, see Note 2, Summary of Significant Accounting Policies, in the Notes to
Condensed Consolidated Financial Statements included in Part I, Item 1 of this
Quarterly Report.

Cost of sales

Cost of sales of $0.2 million for the nine months ended September 30, 2022,
consisted of costs to procure, manufacture and distribute our marketed product
ALBRIOZA. In addition, included in cost of sales are costs to manufacture
ALBRIOZA which has been provided to patients at no cost to them while insurance
reimbursement is established. We expect these costs to continue into the fourth
quarter. ALBRIOZA given to patients at no cost to them is not included in
product revenue, net. Based on our policy to expense costs associated with the
manufacture of our products prior to regulatory approval, certain of the costs
of units recognized as revenue during the nine months ended September 30, 2022,
or less than $0.1 million, were expensed prior to obtaining regulatory approvals
and, therefore, are not included in cost of sales during this period. We expect
cost of sales to increase and gross margin to decrease as we deplete these
inventories and we expect to use the remaining pre-commercialization inventory
for product sales through the third quarter of 2023.

Research and Development Expenses



The following table summarizes our research and development expenses for the
nine months ended September 30, 2022 and 2021 (certain prior year amounts have
been reclassified to conform with current year presentation):

                                         Nine Months Ended September 30,
                                  2022         2021       $ Change      % Change
                                   (in thousands)
AMX0035 - ALS                   $ 47,376     $ 18,958     $  28,418           150 %
Payroll and personnel-related     20,019        5,502        14,517           264 %
Other                              3,242        6,186        (2,944 )         (48 )%
                                $ 70,637     $ 30,646     $  39,991           130 %




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Research and development expenses were $70.6 million for the nine months ended
September 30, 2022, compared to $30.6 million for the nine months ended
September 30, 2021. During these periods, most of our research and development
expenses were related to the development of and clinical trials of AMX0035. The
increase of $40.0 million was primarily due to a $28.4 million increase in
spending on AMX0035 for the treatment of ALS, a $14.5 million increase in
payroll and personnel-related costs, and a $2.9 million decrease in all other
costs. The increases in spending on AMX0035 were primarily related to costs
associated with our global Phase 3 PHOENIX trial of AMX0035 in ALS that was
initiated in November 2021 and consulting and manufacturing development expenses
in anticipation of potential commercialization, which includes inventory raw
material purchases made in anticipation of the lead time necessary to have it
available to meet our clinical trial and potential commercialization needs. The
increase in payroll and personnel-related costs was primarily due to an increase
in the number of employees supporting research and development efforts. The
decreases in other costs were primarily due to a decrease in costs associated
with research and development spend for AMX0035 in other indications, as we
focused our efforts on ALS leading up to our approvals. We expect to increase
research and development for AMX0035 in other indications in future periods.

Selling, General and Administrative Expenses



Selling, general and administrative expenses were $86.3 million for the nine
months ended September 30, 2022 compared to $24.0 million for the nine months
ended September 30, 2021. The increase of $62.3 million was primarily due to
increases of $39.3 million in payroll and personnel-related costs, including
stock-based compensation, $7.5 million in consulting expense, $5.6 million in
professional services, $3.8 million in insurance expense and $3.3 million in
facilities and computer-related expenses. The increase in payroll and
personnel-related costs was primarily due to hiring additional personnel in
commercial and general and administrative functions to support our growth, as
well as commercialization and launch preparation initiatives. The increases in
professional services, consulting expenses, insurance expenses and facilities
and computer-related expenses were primarily due to an increase in spending for
commercial readiness activities and operations as a public company.

Other Income (Expense), Net

Interest Income



Interest income for the nine months ended September 30, 2022 was $1.1 million
compared to less than $0.1 million for the nine months ended September 30, 2021.
The increase was primarily attributable to higher investment balances driven by
our proceeds received from our January 2022 initial public offering, resulting
in higher interest earned.

Change in Fair Value of Convertible Notes



The change in fair value of convertible notes was zero for the nine months ended
September 30, 2022 due to conversion to preferred stock in July 2021, compared
to $5.2 million for the nine months ended September 30, 2021. The $5.2 million
recorded for the nine months ended September 30, 2021 represented a loss in fair
value related to our 2021 Notes.

Other Income, Net



Other income, net was $0.1 million for the nine months ended September 30, 2022,
compared to less than $0.1 million for the nine months ended September 30, 2021.
Other income, net in the nine months ended September 30, 2022 and 2021 was
primarily related to realized and unrealized gains and losses.

Income Taxes



Provision for income taxes was $0.2 million for the nine months ended September
30, 2022 compared to zero for the nine months ended September 30, 2021, and
consists of current income tax expense arising from activities of our foreign
subsidiaries.

Liquidity and Capital Resources

Sources of Liquidity



Since our inception, we have incurred significant operating losses and generated
revenues through five grants from the Grantors. To date, we have financed our
operations primarily through the sale and issuance of common stock, convertible
preferred stock, convertible notes, grant agreements with the Grantors and, to a
lesser extent, a government loan. As of September 30, 2022, we had cash, cash
equivalents and short-term investments of $162.6 million.

                                       34
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From inception through September 30, 2022, we have raised $431.2 million in
aggregate proceeds, net of issuance costs, primarily from the issuance of common
stock, convertible preferred stock, convertible notes and grant agreements. In
July 2021, we issued and sold shares of Series C-1 preferred stock for an
aggregate purchase price of approximately $135.0 million. The 2021 Notes
automatically converted into shares of Series C-2 preferred stock pursuant to
their original terms in July 2021 in connection with our sale of Series C-1
preferred stock. On January 11, 2022, we completed our initial public offering,
pursuant to which we received aggregate net proceeds of $196.4 million,
including the partial exercise by the underwriters of their option to purchase
additional shares, and after deducting underwriting discounts and commissions
and other offering costs. On October 11, 2022, we completed the sale of
7,697,812 shares of our common stock in an underwritten public offering,
pursuant to which we received net proceeds of approximately $230.8 million,
including exercise in full of the underwriters' option to purchase additional
shares, and after deducting underwriting discounts and commissions and other
offering costs. Based on our current operational plans and assumptions, we
believe that our existing cash, cash equivalents and short-term investments as
of September 30, 2022, together with the net proceeds from our follow-on public
offering, and product revenue from RELYVRIO and ALBRIOZA sales, will be
sufficient to meet our anticipated operating and capital expenditure
requirements for at least twelve months after the date of the filing of this
Quarterly Report.

Capital Resources

We expect our expenses to increase substantially in connection with our ongoing
activities, particularly as we advance the preclinical activities, manufacturing
and clinical trials of AMX0035 and any future product candidates, implement our
commercialization plans for ALBRIOZA in Canada and RELYVRIO in the U.S., and
prepare for the commercial launch of AMX0035 in other jurisdictions, if
approved. In addition, we expect to incur additional costs associated with
operating as a public company, including significant legal, accounting, investor
relations and other expenses that we did not incur as a private company. Our
expenses will also increase as we:

continue our research and development efforts, including our ongoing global Phase 3 PHOENIX trial of AMX0035 for the treatment of ALS;


continue to commercialize AMX0035 (also known as ALBRIOZA in Canada and RELYVRIO
in the U.S.) for the treatment of ALS in Canada and the U.S., and pursue launch
of AMX0035 in Europe, if approved;

pursue investigational new drug applications, or INDs, of AMX0035 for the treatment of Wolfram syndrome and potentially for other indications;

conduct preclinical studies and clinical trials for AMX0035 for additional indications and for potential future product candidates;

seek to identify and develop, acquire or in-license additional product candidates;

experience any delays or encounter any issues with any of the above, including but not limited to failed studies, complex results, safety issues, or other regulatory challenges;

develop the necessary processes, controls and manufacturing data to obtain additional marketing approval for AMX0035 or approval for any future product candidates and to support manufacturing on a commercial scale;

seek additional regulatory approvals for AMX0035 or approvals for any future product candidates that successfully complete clinical trials, if any;


hire and retain additional personnel, such as preclinical, clinical, quality
assurance, regulatory affairs, manufacturing, distribution, legal, compliance,
finance, general and administrative, commercial and scientific personnel;

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

continue to transition our organization to being a public company.



We are a publicly traded company and will continue to incur significant legal,
accounting and other expenses that we did not incur as a private company. In
addition, the Sarbanes-Oxley Act of 2002, as well as rules adopted by the SEC
and the Nasdaq Global Select Market, require public companies to implement
specified corporate governance practices that are currently not applicable to us
as a private company. Pursuant to Section 404 of the Sarbanes-Oxley Act of 2002,
or Section 404, we will first be required to furnish a report by our management
on our internal control over financial reporting for the year ending December
31, 2022. However, while we remain an emerging growth company and/or a smaller
reporting company, we will not be required to include an attestation report on
internal control over financial reporting issued by our independent registered
public accounting firm. To achieve compliance with Section 404 within the
prescribed period, we will be engaged in a process to document and evaluate our
internal control over financial reporting, which is both costly and challenging.
In this regard, we will need to continue to dedicate internal resources,
potentially engage outside consultants and adopt a detailed work plan to assess
and document the adequacy of internal control over financial reporting, continue
steps to improve control processes as appropriate, validate through testing that
controls are functioning as

                                       35
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documented and implement a continuous reporting and improvement process for internal control over financial reporting. We expect these rules and regulations will increase our legal and financial compliance costs and will make some activities more time-consuming and costly.



Based on our current operational plans and assumptions, we expect that our
current cash, cash equivalents and short-term investments as of September 30,
2022, combined with the net proceeds from our follow-on offering, and product
revenue from RELYVRIO and ALBRIOZA sales, will be sufficient to fund operations
for at least twelve months after the date of filing of this Quarterly Report. We
have based these estimates on assumptions that may prove to be wrong, and we
could utilize our available capital resources sooner than we expect. As we
progress with our development activities and the regulatory review process, we
expect to incur significant commercialization expenses related to product
manufacturing, pre-commercial activities and commercialization.

Because of the numerous risks and uncertainties associated with research,
development and commercialization of product candidates and programs, we are
unable to estimate the exact amount of our working capital requirements. Our
future funding requirements will depend on and could increase significantly as a
result of many factors, including:

the scope, progress, results and costs of drug discovery, laboratory testing, preclinical and clinical development for AMX0035 and any future product candidates;

the costs, timing and outcome of commercialization activities, including manufacturing, marketing, sales and distribution for ALBRIOZA in Canada, RELYVRIO in the U.S. and for AMX0035, if approved, in other territories or for any future product candidates for which we receive regulatory approval;

the costs, timing and outcome of regulatory review of AMX0035 and any future product candidates;

our ability to establish and maintain collaborations, marketing, distribution and license agreements on favorable terms, if at all;

our ability to enroll clinical trials in a timely manner and to quickly resolve any delays or clinical holds that may be imposed on our development activities;


timing delays with respect to preclinical and clinical development of AMX0035
and any future product candidates, including as result of the ongoing COVID-19
pandemic or other pandemics or disruptions;

the costs of expanding our facilities to accommodate our expected growth in personnel, and the costs of such additional personnel;

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 technologies or other assets;

the sales price and availability of adequate third-party coverage and reimbursement for AMX0035 and any future product candidates, if and when approved; and

the costs of operating as a public company.



Until such time, if ever, that we can generate product revenue sufficient to
achieve profitability, we expect to finance our cash needs through equity
offerings, debt financings, government or other third-party funding, marketing
and distribution arrangements and other collaborations, strategic alliances and
licensing arrangements. To the extent that we raise additional capital through
the sale of common stock, convertible securities or other equity securities,
current ownership interests will be diluted. If we raise additional funds
through collaborations or marketing, distribution or licensing arrangements with
third parties, we may have to relinquish valuable rights to our technologies,
future revenue streams or product candidates or grant licenses on terms that may
not be favorable to us. In addition, debt financing, if available, may result in
fixed payment obligations and may involve agreements that include restrictive
covenants that limit our ability to take specific actions, such as incurring
additional debt, making capital expenditures, creating liens, redeeming stock or
declaring dividends, that could adversely impact our ability to conduct our
business. If we are unable to raise additional funds 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 product
candidates that we would otherwise prefer to develop and market ourselves.

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Cash Flows

Comparison of the Nine Months Ended September 30, 2022 and 2021



The following table summarizes our sources and uses of cash for the periods
presented:

                                                      Nine Months Ended September 30,
                                              2022          2021        $ Change       % Change
                                                       (in thousands)

Net cash used in operating activities $ (130,174 ) $ (46,555 ) $ (83,619 ) 180 % Net cash used in investing activities (10,808 ) (49,220 ) 38,412

            (78 )%
Net cash provided by financing
activities                                    199,627       159,571        40,056             25 %
Effect of exchange rate changes on cash,
cash equivalents and
  restricted cash                                (572 )           4          (576 )      (14,400 )%
Net increase in cash, cash equivalents
and
  restricted cash                          $   58,073     $  63,800     $  (5,727 )           (9 )%






Operating Activities

During the nine months ended September 30, 2022, operating activities used
$130.2 million of cash, primarily resulting from our net loss of $155.7 million,
offset by $15.6 million of non-cash stock-based compensation expense, $0.3
million of depreciation expense, $0.2 million net amortization of premiums and
discounts on investments, and $9.8 million of net cash provided by changes in
our operating assets and liabilities.

Net cash used in our operating assets and liabilities primarily consisted of a
$2.9 million increase in prepaid expenses and other current assets primarily due
to timing of recognition of prepaid insurance, an increase of $0.6 million in
inventory capitalized during the quarter, offset by a $2.7 million increase in
accounts payable, a $10.4 million increase in accrued expenses and deferred rent
due to increased spending for external research and development to support our
growth, and $1.2 million decrease in operating lease right-of use assets.

During the nine months ended September 30, 2021, operating activities used $46.6
million of cash, primarily resulting from our net loss of $59.6 million, $5.7
million of net cash provided by changes in our operating assets and liabilities,
offset by $5.2 million of change in fair value of convertible notes and $2.0
million of non-cash stock compensation expense.

Net cash provided by changes in our operating assets and liabilities primarily
consisted of $1.8 million increase in prepaid expenses and other current assets
and a $0.7 million decrease in accounts payable, offset by $8.1 million increase
in accrued expenses and deferred rent due to increased spending for external
research and development to support our growth.

Investing Activities

During the nine months ended September 30, 2022, net cash used in investing activities was $10.8 million, resulting from $1.9 million of purchases of property and equipment and $154.3 million of purchases of short-term investments, offset by $145.4 million of investments that matured during the period.

During the nine months ended September 30, 2021, net cash used in investing activities was $49.2 million, driven by $49.1 million of purchases of short-term investments.



Financing Activities

During the nine months ended September 30, 2022, net cash provided by financing
activities was $199.6 million. This amount consisted of $216.0 million of gross
proceeds from sale of common stock from our initial public offering, offset by
$15.1 million of underwriters' discounts and $1.5 million of offering costs paid
during the period. Offering costs remaining to be paid as of September 30, 2022
totaled $0.5 million, coupled with offering costs paid in prior periods, results
in total net proceeds from the initial public offering of $196.4 million.

During the nine months ended September 30, 2021, net cash provided by financing was $159.6 million. This amount


                                       37
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consisted of $134.8 million of net proceeds from the issuance of our Series C-1
redeemable convertible preferred stock, $14.3 million of net proceeds from the
issuance of convertible notes to related parties, $11.9 million of net proceeds
from the issuance of the convertible notes and $0.2 million of proceeds from
exercises of stock options, offset by a $1.5 million payment of deferred
offering costs.

Critical Accounting Policies, Recent Accounting Pronouncements 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
judgments that affect the reported amounts of assets, liabilities, costs and
expenses, and the disclosure of contingent assets and liabilities in our
consolidated financial statements. We base our estimates on historical
experience, known trends and events and various other factors that we believe
are reasonable under the circumstances, the results of which form the basis for
making judgments about the carrying values of assets and liabilities that are
not readily apparent from other sources. We evaluate our estimates and
assumptions on an ongoing basis. Our actual results may differ from these
estimates under different assumptions or conditions.

There have been no significant changes to our critical accounting policies from
those described in "Management's Discussion and Analysis of Financial Condition
and Results of Operations," disclosed in our most recent Annual Report with the
exception of significant accounting policies related to revenue and inventory,
as well as significant accounting policies related to the adoption of FASB ASC
Topic 842, Leases, effective January 1, 2022. Refer to Note 2 and Note 5 to the
condensed consolidated financial statements contained in this Quarterly Report
for a discussion new significant accounting policies over revenue and inventory,
and FASB ASC Topic 842, Leases, respectively.

Emerging Growth Company and Smaller Reporting Company Status



The Jumpstart Our Business Startups Act of 2012, or JOBS Act, permits an
"emerging growth company" such as us to take advantage of an extended transition
period to comply with new or revised accounting standards applicable to public
companies until those standards would otherwise apply to private companies. We
have elected to use this extended transition period for complying with new or
revised accounting standards that have different effective dates for public and
private companies until the earlier of the date we (i) are no longer an emerging
growth company or (ii) affirmatively and irrevocably opt out of the extended
transition period provided in the JOBS Act. As a result, we will not be subject
to the same new or revised accounting standards as other public companies that
are not emerging growth companies, and our condensed consolidated financial
statements may not be comparable to other public companies that comply with new
or revised accounting pronouncements as of public company effective dates. We
may choose to early adopt any new or revised accounting standards whenever such
early adoption is permitted for private companies.

We will cease to be an emerging growth company on the date that is the earliest
of (i) the last day of the fiscal year in which we have total annual gross
revenues of $1.235 billion or more, (ii) the last day of our fiscal year
following the fifth anniversary of the date of the closing of our initial public
offering, (iii) the date on which we have issued more than $1.0 billion in
nonconvertible debt during the previous three years or (iv) the date on which we
are deemed to be a large, accelerated filer under the rules of the Securities
and Exchange Commission.

We are also a "smaller reporting company", and we will continue to be a smaller
reporting company until the first quarter of the fiscal year following the
determination that the market value of our stock held by non-affiliates is more
than $250 million measured on the last business day of our second fiscal
quarter, or our annual revenue are more than $100 million during the most
recently completed fiscal year and the market value of our stock held by
non-affiliates is more than $700 million measured on the last business day of
our second fiscal quarter. Similar to emerging growth companies, smaller
reporting companies are able to provide simplified executive compensation
disclosure and have certain other reduced disclosure obligations, including,
among other things, being required to provide only the two most recent fiscal
years of audited financial statements.

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