10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

[Mark One]

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the Quarterly Period Ended March 31, 2024

OR

☐ TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File No. 001-33057

CATALYST PHARMACEUTICALS, INC.

(Exact name of registrant as specified in its charter)

Delaware	76-0837053
(State or other jurisdiction of incorporation or organization)	(IRS Employer Identification No.)
355 Alhambra Circle Suite 801 Coral Gables, Florida	33134
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (305) 420-3200

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class	Ticker Symbol	Name of Exchange on Which Registered
Common Stock, par value $0.001 per share	CPRX	NASDAQ Capital Market

Indicate by checkmark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such report(s), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See definitions of “accelerated filer”, “large accelerated filer”, “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act:

Large accelerated filer	☒	Accelerated Filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date 118,115,079 shares of common stock, $0.001 par value per share, were outstanding as of May 6, 2024.

CATALYST PHARMACEUTICALS, INC.

INDEX

PART I. FINANCIAL INFORMATION

Item 1.	FINANCIAL STATEMENTS
	Consolidated balance sheets at March 31, 2024 (unaudited) and December 31, 2023	3
	Consolidated statements of operations and comprehensive income for the three months ended March 31, 2024 and 2023 (unaudited)	4
	Consolidated statements of changes in stockholders’ equity for the three months ended March 31, 2024 and 2023 (unaudited)	5
	Consolidated statements of cash flows for the three months ended March 31, 2024 and 2023 (unaudited)	6
	Notes to unaudited consolidated financial statements	7
Item 2.	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	31
Item 3.	QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK	44
Item 4.	CONTROLS AND PROCEDURES	44
	PART II. OTHER INFORMATION
Item 1.	LEGAL PROCEEDINGS	45
Item 1A.	RISK FACTORS	45
Item 2.	UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS	46
Item 3.	DEFAULTS UPON SENIOR SECURITIES	46
Item 4.	MINE SAFETY DISCLOSURE	46
Item 5.	OTHER INFORMATION	46
Item 6.	EXHIBITS	46
SIGNATURES		47

2

CATALYST PHARMACEUTICALS, INC.

CONSOLIDATED BALANCE SHEETS

(in thousands, except share data)

	March 31, 2024		December 31, 2023
	(unaudited)
ASSETS
Current Assets:
Cash and cash equivalents	$	310,411	$	137,636
Accounts receivable, net		60,493		53,514
Inventory		19,953		15,644
Prepaid expenses and other current assets		13,745		12,535
Total current assets		404,602		219,329
Operating lease right-of-use asset		2,440		2,508
Property and equipment, net		1,308		1,195
License and acquired intangibles, net		184,705		194,049
Deferred tax assets, net		38,276		36,544
Investment in equity securities		15,345		16,489
Total assets	$	646,676	$	470,114
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current Liabilities:
Accounts payable	$	10,261	$	14,795
Accrued expenses and other liabilities		69,305		61,268
Total current liabilities		79,566		76,063
Operating lease liability, net of current portion		3,091		3,188
Other non-current liabilities		2,607		2,982
Total liabilities		85,264		82,233
Commitments and contingencies (Note 12)
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized: none issued and outstanding at March 31, 2024 and December 31, 2023		—		—
Common stock, $0.001 par value, 200,000,000 shares authorized; 118,029,526 shares and 107,121,549 shares issued and outstanding at March 31, 2024 and December 31, 2023, respectively		118		107
Additional paid-in capital		416,747		266,488
Retained earnings		144,547		121,272
Accumulated other comprehensive income (Note 4)		—		14
Total stockholders’ equity		561,412		387,881
Total liabilities and stockholders’ equity	$	646,676	$	470,114

The accompanying notes are an integral part of these consolidated financial statements.

3

CATALYST PHARMACEUTICALS, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (unaudited)

(in thousands, except share and per share data)

	For the Three Months Ended March 31,
	2024			2023
Revenues:
Product revenue, net	$	98,441		$	85,304
License and other revenue		68			62
Total revenues		98,509			85,366
Operating costs and expenses:
Cost of sales (a)		12,520			9,946
Research and development		2,581			3,562
Selling, general and administrative (a)		46,938			29,718
Amortization of intangible assets		9,344			6,531
Total operating costs and expenses		71,383			49,757
Operating income		27,126			35,609
Other income, net		1,963			1,704
Net income before income taxes		29,089			37,313
Income tax provision		5,814			7,745
Net income	$	23,275		$	29,568
Net income per share:
Basic	$	0.20		$	0.28
Diluted	$	0.19		$	0.26
Weighted average shares outstanding:
Basic		116,806,117			105,561,229
Diluted		123,403,626			113,986,129
Net income	$	23,275		$	29,568
Other comprehensive income (Note 4):
Unrealized gain (loss) on available-for-sale securities, net of tax of $4 and $5, respectively		(14	)		(13	)
Comprehensive income	$	23,261		$	29,555

(a) exclusive of amortization of intangible assets

The accompanying notes are an integral part of these consolidated financial statements.

4

CATALYST PHARMACEUTICALS, INC.

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (unaudited)

For the three months ended March 31, 2024 and 2023

(in thousands)

	Preferred Stock		Common Stock				Additional Paid-in Capital			Retained Earnings		Accumulated Other Comprehensive Income			Total
			Shares		Amount
Balance at December 31, 2023	$	—		107,122	$	107	$	266,488		$	121,272	$	14		$	387,881
Issuance of common stock, net		—		10,000		10		140,694			—		—			140,704
Stock-based compensation		—		—		—		8,248			—		—			8,248
Exercise of stock options for common stock		—		664		1		1,521			—		—			1,522
Issuance of common stock upon vesting of restricted stock units, net		—		244		—		(204	)		—		—			(204	)
Other comprehensive gain (loss)		—		—		—		—			—		(14	)		(14	)
Net income		—		—		—		—			23,275		—			23,275
Balance at March 31, 2024	$	—		118,030	$	118	$	416,747		$	144,547	$	—		$	561,412

	Preferred Stock		Common Stock				Additional Paid-in Capital			Retained Earnings		Accumulated Other Comprehensive Income			Total
			Shares		Amount
Balance at December 31, 2022	$	—		105,263	$	105	$	250,430		$	49,862	$	24		$	300,421
Stock-based compensation		—		—		—		2,892			—		—			2,892
Exercise of stock options for common stock		—		548		1		1,269			—		—			1,270
Issuance of common stock upon vesting of restricted stock units, net		—		127		—		(477	)		—		—			(477	)
Other comprehensive gain (loss)		—		—		—		—			—		(13	)		(13	)
Net income		—		—		—		—			29,568		—			29,568
Balance at March 31, 2023	$	—		105,938	$	106	$	254,114		$	79,430	$	11		$	333,661

The accompanying notes are an integral part of these consolidated financial statements.

5

CATALYST PHARMACEUTICALS, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited)

(in thousands)

	For the Three Months Ended March 31,
	2024			2023
Operating Activities:
Net income	$	23,275		$	29,568
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation		86			69
Stock-based compensation		8,248			2,892
Amortization of intangible assets		9,344			6,531
Deferred taxes		(1,746	)		(1,519	)
Accretion of discount		153			—
Reduction in the carrying amount of right-of-use asset		68			64
Acquired inventory samples expensed from asset acquisition		—			130
Change in fair value of equity securities		1,144			—
(Increase) decrease in:
Accounts receivable, net		(6,979	)		(22,963	)
Inventory		(4,309	)		577
Prepaid expenses and other current assets		(1,210	)		(191	)
Increase (decrease) in:
Accounts payable		(4,534	)		(584	)
Accrued expenses and other liabilities		8,474			(2,422	)
Operating lease liability		(89	)		(82	)
Net cash provided by (used in) operating activities		31,925			12,070
Investing Activities:
Purchases of property and equipment		(199	)		(74	)
Payment in connection with asset acquisition		—			(162,293	)
Net cash provided by (used in) investing activities		(199	)		(162,367	)
Financing Activities:
Payment of employee withholding tax related to stock-based compensation		(204	)		(477	)
Proceeds from exercise of stock options		1,522			1,270
Payment of liabilities arising from asset acquisition		(973	)		(644	)
Proceeds from issuance of common stock		141,000			—
Payment of fees in connection with issuance of common stock		(296	)		—
Net cash provided by (used in) financing activities		141,049			149
Net increase (decrease) in cash and cash equivalents		172,775			(150,148	)
Cash and cash equivalents – beginning of period		137,636			298,395
Cash and cash equivalents – end of period	$	310,411		$	148,247
Supplemental disclosures of cash flow information:
Cash paid for interest	$	65		$	—
Non-cash investing and financing activities:
Liabilities arising from asset acquisition	$	—		$	1,915

The accompanying notes are an integral part of these consolidated financial statements.

6

CATALYST PHARMACEUTICALS, INC.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

1. Organization and Description of Business.

Catalyst Pharmaceuticals, Inc. and subsidiary (collectively, the Company) is a commercial-stage, patient-centric biopharmaceutical company focused on in-licensing, developing, and commercializing novel high-quality medicines for patients living with rare and difficult to treat diseases. The Company currently markets three drug products, FIRDAPSE® (amifampridine), FYCOMPA® (perampanel), and AGAMREE® (vamorolone). The Company is also currently seeking to further expand its product portfolio, with a focus on acquiring the rights to late-stage products to treat rare (orphan) central nervous system and adjacent rare (orphan) diseases. With an unwavering patient focus embedded in everything the Company does, it is committed to providing innovative, best-in-class medications with the hope of making a meaningful impact on those affected by these conditions.

The Company’s New Drug Application (NDA) for FIRDAPSE® (amifampridine) Tablets 10 mg for the treatment of adults with Lambert-Eaton myasthenic syndrome (LEMS) was approved in 2018 by the U.S. Food & Drug Administration (FDA), and FIRDAPSE® is commercially available in the United States (U.S.) as a treatment for adults with LEMS. Further, Canada’s national healthcare regulatory agency, Health Canada, approved the use of FIRDAPSE® for the treatment of adult patients in Canada with LEMS in 2020 and FIRDAPSE® is commercially available in Canada for the treatment of patients with LEMS through a license and supply agreement with KYE Pharmaceuticals. In the third quarter of 2022, the FDA approved the Company’s supplemental New Drug Application approving an expansion of the FIRDAPSE® label to include pediatric patients (ages six and older).

On December 17, 2022, the Company entered into an asset purchase agreement with Eisai Co., Ltd. (Eisai) for the acquisition of the U.S. rights to FYCOMPA® (perampanel) CIII, a prescription medication used alone or in combination with other medicines to treat focal onset seizures with or without secondarily generalized seizures in people with epilepsy aged four and older and with other medicines to treat primary generalized tonic-clonic seizures in people with epilepsy aged 12 and older. The Company closed the acquisition of FYCOMPA® on January 24, 2023 and the Company began marketing FYCOMPA® in the U.S.

In July 2023, the Company completed its acquisition from Santhera Pharmaceuticals Holdings (Santhera) of an exclusive license for North America for AGAMREE® (vamorolone), a treatment for patients suffering with Duchenne muscular dystrophy (DMD). The license is for exclusive commercial rights in the U.S., Canada, and Mexico, as well as the right of first negotiation in Europe and Japan should Santhera pursue partnership opportunities in those jurisdictions. Additionally, the Company will hold North American rights for any future approved indications of AGAMREE®. AGAMREE® has previously received FDA Orphan Drug and Fast Track designations. On October 26, 2023, the FDA approved AGAMREE® oral suspension 40 mg/ml for the treatment of DMD in patients aged two years and older, and on March 13, 2024, the Company announced the U.S. commercial launch of AGAMREE®.

Since inception, the Company has devoted substantially all its efforts to business planning, research and development, recruiting management and technical staff, acquiring operating assets, raising capital, and selling its products. The Company has been able to fund its cash needs to date through offerings of its securities and from revenues from sales of its products. See Note 15 (Stockholders’ Equity).

Capital Resources

Based on forecasts of available cash, the Company believes that it has sufficient resources to support the currently anticipated operations for at least the next 12 months from the date of this report.

The Company may raise funds in the future through public or private equity offerings, debt financings, corporate collaborations, governmental research grants or other means. The Company may also seek to raise new capital to fund additional business development activities, even if it has sufficient funds for its planned operations. Any sale by the Company of additional equity or convertible debt securities could result in dilution to the Company’s current stockholders. There can be no assurance that any required additional funding will be available to the Company at all or available on terms acceptable to the Company. Further, to the extent that the Company raises additional funds through collaborative arrangements, it may be necessary to relinquish some rights to the Company’s drug candidates or grant sublicenses on terms that are not favorable to the Company. If the Company is not able to secure additional funding when needed, the Company may have to delay, reduce the scope of, or eliminate one or more research and development programs, which could have an adverse effect on the Company’s business.

On January 9, 2024, the Company completed a public offering of 10 million shares of its common stock, raising net proceeds of approximately $140.7 million. The proceeds of the offering will be used to potentially acquire new products and for general corporate purposes.

Risks and Uncertainties

The Company is subject to risks and uncertainties that could affect its business in unforeseen ways.

7

2. Basis of Presentation and Significant Accounting Policies.

a. INTERIM FINANCIAL STATEMENTS. The accompanying unaudited interim consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP), and pursuant to the rules and regulations of the Securities and Exchange Commission (SEC) for reporting of interim financial information. Pursuant to such rules and regulations, certain information and note disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been omitted. The consolidated balance sheet as of December 31, 2023 included in this Form 10-Q was derived from the audited financial statements and does not include all disclosures required by U.S. GAAP.

In the opinion of management, the accompanying unaudited interim consolidated financial statements of the Company contain all adjustments (consisting of only normal recurring adjustments) necessary to present fairly the financial position of the Company as of the dates and for the periods presented. Accordingly, these consolidated statements should be read in conjunction with the financial statements and notes thereto for the year ended December 31, 2023 included in the 2023 Annual Report on Form 10-K filed by the Company with the SEC. The results of operations for the three months ended March 31, 2024 are not necessarily indicative of the results to be expected for any future period or for the full 2024 fiscal year.

b. PRINCIPLES OF CONSOLIDATION. The consolidated financial statements include the Company’s accounts and those of its wholly-owned subsidiary, Catalyst Pharmaceuticals Ireland, Ltd. (Catalyst Ireland). All intercompany accounts and transactions have been eliminated in consolidation. Catalyst Ireland was organized in 2017.

c. USE OF ESTIMATES. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.

d. CASH AND CASH EQUIVALENTS. The Company primarily invests in high credit-quality instruments in order to obtain higher yields on its cash equivalents. The Company considers all highly liquid instruments, purchased with an original maturity of three months or less, to be cash equivalents. Cash equivalents consist mainly of money market funds and U.S. Treasuries. The Company has substantially all its cash and cash equivalents deposited in money market accounts with one financial institution. These amounts exceed federally insured limits. 

e. INVESTMENTS. At March 31, 2024 investments consisted of an investment in equity securities. At December 31, 2023, investments consisted of U.S. Treasuries and an investment in equity securities. Such investments are not insured by the Federal Deposit Insurance Corporation.

There were no U.S. Treasuries held at March 31, 2024 and U.S. Treasuries held at December 31, 2023 were classified as available-for-sale securities. The Company classifies U.S. Treasuries with stated maturities of greater than three months and less than one year in short-term investments. U.S. Treasuries with stated maturities greater than one year are classified as non-current investments in its consolidated balance sheets.

The Company records available-for-sale securities at fair value with unrealized gains and losses reported in accumulated other comprehensive income (in stockholders’ equity). Realized gains and losses are included in other income, net in the consolidated statements of operations and comprehensive income and are derived using the specific identification method for determining the cost of securities sold. Interest income is recognized when earned and is included in other income, net in the consolidated statements of operations and comprehensive income. The Company recognizes a charge when the declines in the fair value below the amortized cost basis of its available-for-sale securities are judged to be as a result of a credit loss. The Company considers various factors in determining whether to recognize an allowance for credit losses including whether the Company intends to sell the security or whether it is more likely than not that the Company would be required to sell the security before recovery of the amortized cost basis. If the unrealized loss of an available-for-sale debt security is determined to be a result of a credit loss the Company would recognize an allowance and the corresponding credit loss would be included in the consolidated statements of operations and comprehensive income. The Company has not recorded an allowance for credit loss on its available-for-sale securities. See Note 3 (Investments).

In July 2023, the Company made a strategic equity investment into Santhera by acquiring 1,414,688 of Santhera’s post reverse-split ordinary shares (representing approximately 11.26% of Santhera’s outstanding ordinary shares following the transaction). The investment is denominated in Swiss Francs. The Company has determined that it does not have significant influence over the operations of Santhera and accordingly the investment in Santhera’s ordinary shares is recorded under ASC 321, Equity Securities, with changes in fair value, inclusive of changes resulting from movements in foreign exchange rates, in other income, net in the consolidated statement of operations and comprehensive income.

8

2. Basis of Presentation and Significant Accounting Policies (continued).

f. ACCOUNTS RECEIVABLE, NET. Accounts receivable are recorded net of customer allowance for distribution fees, trade discounts, prompt payment discounts, chargebacks and expected credit losses. Allowances for distribution fees, trade discounts, prompt payment discounts and chargebacks are based on contractual terms. The Company estimates the allowance for expected credit losses based on existing contractual payment terms, actual payment patterns of its customers, current and future economic and market conditions and individual customer circumstances. The Company has not historically experienced any significant credit losses. All customer accounts are actively managed. At March 31, 2024 and December 31, 2023, the Company determined that an allowance for expected credit losses was not required. No accounts were written off during the periods presented.

g. INVENTORY. Inventories are stated at the lower of cost or net realizable value. Inventories consist of raw materials, work-in-process and finished goods. Costs to be capitalized as inventories primarily include third-party manufacturing costs and other overhead costs. Cost is determined using a standard cost method, which approximates actual cost, and assumes a first-in, first out (FIFO) flow of goods. If information becomes available that suggests that inventories may not be realizable, the Company may be required to expense a portion or all of the previously capitalized inventories.

Products that have been approved by the FDA or other regulatory authorities, such as FIRDAPSE®, FYCOMPA® and AGAMREE® are also used in clinical programs to assess the safety and efficacy of the products for usage in treating diseases that have not been approved by the FDA or other regulatory authorities. The forms of FIRDAPSE®, FYCOMPA® and AGAMREE® utilized for both commercial and clinical programs are identical and, as a result, the inventories have an “alternative future use” as defined in authoritative guidance. Raw materials associated with clinical development programs are included in inventory and charged to research and development expense when the product enters the research and development process and no longer can be used for commercial purposes and, therefore, does not have an “alternative future use”.

The Company evaluates for potential excess inventory by analyzing current and future product demand relative to the remaining product shelf life. The Company builds demand forecasts by considering factors such as, but not limited to, overall market potential, market share, market acceptance, and patient usage.

h. PREPAID EXPENSES AND OTHER CURRENT ASSETS. Prepaid expenses and other current assets consist primarily of prepaid manufacturing, prepaid tax, prepaid insurance, prepaid subscription fees, prepaid research fees, prepaid commercialization expenses, prepaid co-pay assistance program, amounts due from collaborative and license arrangements and prepaid conference and travel expenses. Prepaid research fees consist of advances for the Company’s product development activities, including contracts for pre-clinical studies, clinical trials and studies, regulatory affairs and consulting. Prepaid manufacturing consists of advances for the Company’s drug manufacturing activities. Such advances are recorded as expense as the related goods are received or the related services are performed.

i. PROPERTY AND EQUIPMENT, NET. Property and equipment are recorded at cost less accumulated depreciation. Depreciation is calculated to amortize the depreciable assets over their useful lives using the straight-line method and commences when the asset is placed in service. Leasehold improvements are amortized on a straight-line basis over the term of the lease or the estimated life of the improvement, whichever is shorter. Useful lives generally range from three to five years for computer equipment and software, from five to seven years for furniture and equipment, and from five to ten years for leasehold improvements. Expenditures for repairs and maintenance are charged to expenses as incurred.

j. BUSINESS COMBINATIONS AND ASSET ACQUISITIONS. The Company evaluates acquisitions of assets and other similar transactions to assess whether or not the transaction should be accounted for as a business combination or asset acquisition by first applying a screen test to determine if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets. If the screen test is met, the transaction is accounted for as an asset acquisition. If the screen test is not met, further determination is required as to whether or not the Company has acquired inputs and processes that have the ability to create outputs which would meet the requirements of a business. If determined to be an asset acquisition, the Company accounts for the transaction under ASC 805-50, which requires the acquiring entity in an asset acquisition to recognize assets acquired and liabilities assumed based on the cost to the acquiring entity on a relative fair value basis, which includes transaction costs in addition to consideration given. Goodwill is not recognized in an asset acquisition and any excess consideration transferred over the fair value of the net assets acquired is allocated to the identifiable assets based on relative fair values. Contingent consideration payments in asset acquisitions are recognized when the contingency is resolved and the consideration is paid or becomes payable.

9

2. Basis of Presentation and Significant Accounting Policies (continued).

See Notes 12 (Commitments and Contingencies) and 13 (Agreements) for further discussion on the Company’s exclusive license agreement with Jacobus Pharmaceutical Company, Inc. (Jacobus), for the rights to develop and commercialize RUZURGI® in the U.S. and Mexico, which the Company accounted for as an asset acquisition under ASC 805-50. See Note 13 (Agreements) for further discussion on the Company’s acquisitions of the U.S. rights to FYCOMPA® from Eisai Co., Ltd, and on the exclusive license for North America acquired from Santhera for AGAMREE®, both of which the Company accounted for as asset acquisitions under ASC 805-50.

k. INTANGIBLE ASSETS, NET. Identifiable intangible assets with a finite life are comprised of licensed rights and other acquired intangible assets and are amortized on a straight-line basis over the respective estimated useful life.

The Company reviews intangible assets with finite lives for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. If indicators of impairment exist, an impairment test is performed to assess the recoverability of the affected assets by determining whether the carrying amount of such assets exceeds the undiscounted expected future cash flows. If the affected assets are deemed not recoverable, the Company would estimate the fair value of the assets and record an impairment loss.

l. FAIR VALUE OF FINANCIAL INSTRUMENTS. The Company’s financial instruments consist of cash and cash equivalents, investments, accounts receivable, accounts payable, and accrued expenses and other liabilities. At March 31, 2024 and December 31, 2023, the fair value of these instruments approximated their carrying value.

m. FAIR VALUE MEASUREMENTS. Current Financial Accounting Standards Board (FASB) fair value guidance emphasizes that fair value is a market-based measurement, not an entity-specific measurement. Therefore, a fair value measurement should be determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair value measurements, current FASB guidance establishes a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions that it believes market participants would use in pricing assets or liabilities (unobservable inputs classified within Level 3 of the hierarchy).

Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability, which are typically based on an entity’s own assumptions, as there is little, if any, related market activity.

In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.

	Fair Value Measurements at Reporting Date Using (in thousands)
	Balances as of March 31, 2024		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and cash equivalents:
Money market funds	$	280,802	$	280,802	$	—	$	—
Investment in equity securities:
Equity securities	$	15,345	$	15,345	$	—	$	—

10

2. Basis of Presentation and Significant Accounting Policies (continued).

	Fair Value Measurements at Reporting Date Using (in thousands)
	Balances as of December 31, 2023		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and cash equivalents:
Money market funds	$	18,256	$	18,256	$	—	$	—
U.S. Treasuries	$	94,523	$	94,523	$	—	$	—
Investment in equity securities:
Equity securities	$	16,489	$	16,489	$	—	$	—

n. OPERATING LEASES. The Company determines if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (ROU) assets, other current liabilities, and operating lease liabilities on its consolidated balance sheets. Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. As the Company’s lease does not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at commencement date in determining the present value of future payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives and initial direct costs incurred. The Company’s lease term includes options to extend or terminate the lease, however, these options are not considered in the lease term as the Company is not reasonably certain that it will exercise these options. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term. The Company has a lease agreement with lease and non-lease components, which are accounted for separately.

o. SHARE REPURCHASES. In March 2021, the Company’s Board of Directors approved a share repurchase program that authorizes the repurchase of up to $40 million of the Company’s common stock.

The Company accounts for share repurchases by charging the excess of the repurchase price over the repurchased common stock’s par value entirely to retained earnings. All repurchased shares are retired and become authorized but unissued shares. The Company accrues for the shares purchased under the share repurchase plan based on the trade date. The Company may terminate or modify its share repurchase program at any time.

p. REVENUE RECOGNITION.

Product Revenues:

To determine revenue recognition for arrangements that are within the scope of Accounting Standards Codification (ASC) Topic 606 – Revenue from Contracts with Customers (Topic 606), the Company 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, (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. The Company assesses the goods or services promised within each contract and determines those that are performance obligations by assessing whether each promised good or service is distinct. The Company then recognizes as revenue the amount of the transaction price that is allocated to the respective performance obligation when (or as) the performance obligation is satisfied. For a complete discussion of accounting for product revenue, see Product Revenue, Net below.

The Company also may generate revenues from payments received under collaborative and license agreements. Collaborative and license agreement payments may include nonrefundable fees at the inception of the agreements, contingent payments for specific achievements designated in the agreements, and/or net profit-sharing payments on sales of products resulting from the collaborative and license arrangements. For a complete discussion of accounting for collaborative and licensing arrangements, see Revenues from Collaboration and Licensing Arrangements below.

11

2. Basis of Presentation and Significant Accounting Policies (continued).

The Company recognizes revenue when its customers obtain title of the promised goods, in an amount that reflects the consideration to which the Company expects to be entitled in exchange for these goods. For FIRDAPSE® and AGAMREE®, subsequent to receiving FDA approvals, the Company entered into an arrangement with one distributor (the Customer), which is the exclusive distributor of FIRDAPSE® and AGAMREE® in the U.S. The Customer subsequently resells FIRDAPSE® and AGAMREE® to a small group of exclusive specialty pharmacies (SPs) whose dispensing activities for patients with specific payors may result in government-mandated or privately negotiated rebate obligations for the Company with respect to the purchase of FIRDAPSE® and AGAMREE®.

During 2023, the Company sold FYCOMPA®, through a Transition Service Agreement with Eisai to major wholesalers, specialty pharmaceutical distributors, managed care organizations, and government agencies. The transition services under the Transition Services Agreement ended on December 31, 2023, and beginning on January 1, 2024, the Company commenced sales of FYCOMPA® in the U.S. commercial market to major wholesalers, specialty pharmaceutical distributors, managed care organizations, and government agencies.

Product Revenue, Net: The Company recognizes revenue on product sales when its’ customers obtain control of the Company’s products, which occur at a point in time (upon delivery or upon dispense to patient). Product revenue is recorded net of applicable reserves for variable consideration, including discounts and allowances. The Company’s payment terms range between 15 and 60 days.

Shipping and handling costs for product shipments occur prior to the customer obtaining control of the goods and are recorded in cost of sales.

If taxes should be collected from the Customer relating to product sales and remitted to governmental authorities, they will be excluded from revenue. The Company expenses incremental costs of obtaining a contract when incurred if the expected amortization period of the asset that the Company would have recognized is one year or less. However, no such costs were incurred during the three months ended March 31, 2024 and 2023.

During the three months ended March 31, 2024 and 2023, substantially all of the Company’s product revenues were from sales to customers in the U.S.

The following table summarizes the Company’s net product revenue disaggregated by product (in thousands):

	For the Three Months Ended March 31,
	2024		2023
FIRDAPSE®	$	66,842	$	57,526
FYCOMPA®		30,425		27,778
AGAMREE®		1,174		—
Total product revenue, net	$	98,441	$	85,304

Reserves for Variable Consideration: Revenue from product sales is recorded at the net sales price (transaction price), which includes estimates of variable consideration for which reserves are established. Components of variable consideration include trade discounts and allowances, prompt payment discounts, product returns, provider chargebacks and discounts, government rebates, and other incentives, such as voluntary patient assistance, and other allowances that are offered within contracts between the Company and its customers relating to the Company’s sale of its products. These reserves, as detailed below, are based on the amounts earned, or to be claimed on the related sales, and are classified as reductions of accounts receivable (if the amount is payable to its customers) or a current liability (if the amount is payable to a party other than its customers).

These estimates take into consideration a range of possible outcomes which are probability-weighted in accordance with the expected value method in Topic 606 for relevant factors such as current contractual and statutory requirements, specific known market events and trends, industry data, and forecasted customer buying and payment patterns. Overall, these reserves reflect the Company’s best estimates of the amount of consideration to which it is entitled based on the terms of the respective underlying contracts.

12

2. Basis of Presentation and Significant Accounting Policies (continued).

The amount of variable consideration which is included in the transaction price may be constrained and is included in the net sales price only to the extent that it is probable that a significant reversal in the amount of the cumulative revenue recognized under the contract will not occur in a future period. The Company’s analyses also contemplates application of the constraint in accordance with the guidance, under which it determined a material reversal of revenue would not occur in a future period for the estimates detailed below as of March 31, 2024 and, therefore, the transaction price was not reduced further during the three months ended March 31, 2024 and 2023. Actual amounts of consideration ultimately received may differ from the Company’s estimates. If actual results in the future vary from the Company’s estimates, the Company will adjust these estimates, which would affect net product revenue and earnings in the period such variances become known.

Trade Discounts, Allowances and Wholesaler Fees: The Company provides its customers with a discount that is explicitly stated in its contract and is recorded as a reduction of revenue in the period the related product revenue is recognized. To the extent the services received are distinct from the sale of products to its customers, these payments are classified in selling, general and administrative expenses in the Company’s consolidated statements of operations and comprehensive income. However, if the Company has determined such services received are not distinct from the Company’s sale of products to its customers, these payments have been recorded as a reduction of revenue within the consolidated statements of operations and comprehensive income through March 31, 2024 and 2023, as well as a reduction to accounts receivable, net on the consolidated balance sheets.

Prompt Payment Discounts: The Company provides its customers with prompt payment discounts which may result in adjustments to the price that is invoiced for the product transferred, in the case that payments are made within a defined period. The prompt payment discount reserve is based on actual invoice sales and contractual discount rates. Reserves for prompt payment discounts are included in accounts receivable, net on the consolidated balance sheets.

Funded Co-pay Assistance Program: The Company contracts with a third-party to manage the co-pay assistance program intended to provide financial assistance to qualified commercially-insured patients. The calculation of the accrual for co-pay assistance is based on an estimate of claims and the cost per claim that the Company expects to receive associated with its products, that have been recognized as revenue, but remains in the distribution channel at the end of each reporting period. These payments are considered payable to the third-party vendor and the related reserve is 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 in accrued expenses and other liabilities in the consolidated balance sheets.

Product Returns: Consistent with industry practice, the Company offers its customers limited product return rights for damaged and expiring product, provided it is within a specified period around the product expiration date as set forth in the applicable individual distribution or master agreement. The Company estimates the amount of its product sales that may be returned by its customers and records this estimate as a reduction of revenue in the period in which the related product revenue is recognized. The Company currently estimates product return liabilities using available industry data and its own sales information, including its visibility into the inventory remaining in the distribution channel. Return payments related to the sale of products are considered payable to the third-party vendor and the related reserve is 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 in accrued expenses and other liabilities in the consolidated balance sheets.

Provider Chargebacks and Discounts: Chargebacks for fees and discounts to providers represent the estimated obligations resulting from contractual commitments to sell products to qualified healthcare providers at prices lower than the list prices charged to the customer, who directly purchases the product from the Company. The customer charges the Company for the difference between what they paid for the product and the ultimate selling price to the qualified healthcare providers. The Company also participates in programs with government entities and other parties, including covered entities under the 340B Drug Pricing Program, whereby pricing on FYCOMPA® is extended below wholesaler list price to participating entities (the FYCOMPA® Participants). These entities purchase FYCOMPA® through wholesalers at the lower program price and the wholesalers then charge the Company the difference between their acquisition cost and the lower program price.

13

2. Basis of Presentation and Significant Accounting Policies (continued).

These reserves are established in the same period that the related revenue is recognized, resulting in a reduction of product revenue, net and accounts receivable, net. Chargeback amounts are generally determined at the time of resale to the qualified healthcare provider by the customer or at the time of a resale to a FYCOMPA® Participant by a wholesaler, and the Company generally issues credits for such amounts within a few weeks of the customer or wholesalers’ notification to the Company of the resale. Reserves for chargebacks consist primarily of chargebacks that the customer or wholesalers have claimed, but for which the Company has not yet issued a credit.

Government Rebates: The Company is subject to discount obligations under state Medicaid, Medicare and other government programs. These reserves are recorded in the same period the related revenue is recognized, resulting in a reduction of product revenue. For reserves related to the sale of its products, there is an establishment of a current liability, which is included in accrued expenses and other liabilities on the consolidated balance sheets. For Medicare, the Company also estimates the number of patients in the prescription drug coverage gap for whom the Company will owe an additional liability under the Medicare Part D program.

The Company’s 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 estimated future claims that will be made for product that has been recognized as revenue, but which remains in the distribution channel inventories at the end of each reporting period.

Payor Rebates: The Company contracts with certain private payor organizations, primarily insurance companies and pharmacy benefit managers, for the payment of rebates with respect to utilization of its products. The Company estimates these rebates and records such estimates in the same period the related revenue is recognized, resulting in a reduction of product revenue, net and the establishment of a current liability, which is included in accrued expenses and other liabilities on the consolidated balances sheets.

Bridge and Patient Assistance Programs: The Company provides FIRDAPSE® and AGAMREE® free of charge to uninsured patients who satisfy pre-established criteria for either the Bridge Program or the Patient Assistance Program. Patients who meet the Bridge Program eligibility criteria and are transitioning from investigational product while they are waiting for a coverage determination, or later, for patients whose access is threatened by the complications arising from a change of insurer may receive a temporary supply of free FIRDAPSE® or AGAMREE® while the Company is determining the patient’s third-party insurance, prescription drug benefit or other third-party coverage for FIRDAPSE® or AGAMREE®. The Patient Assistance Program provides FIRDAPSE® or AGAMREE® free of charge for longer periods of time for those who are uninsured or functionally uninsured with respect to FIRDAPSE® or AGAMREE® because they are unable to obtain coverage from their payor despite having health insurance, to the extent allowed by applicable law.

The Company provides FYCOMPA® free of charge to uninsured patients who satisfy pre-established criteria through a Patient Assistance Program. In addition, Catalyst provides programs to assist patients through the process for obtaining reimbursement approval for their FYCOMPA® prescriptions from their insurers. Catalyst also provides support for patients using FYCOMPA® through an Instant Savings Card Program.

The Company does not recognize any revenue related to these free products and the associated costs are classified in selling, general and administrative expenses in the Company’s consolidated statements of operations and comprehensive income.

Revenues from Collaboration and Licensing Arrangements:

The Company analyzes license and collaboration arrangements pursuant to FASB ASC Topic 808, Collaborative Arrangement Guidance and Consideration (Topic 808), to assess whether such arrangements, or transactions between arrangement participants, 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 or are more akin to a vendor-customer relationship. In making this evaluation, the Company considers whether the activities of the collaboration are considered to be distinct and deemed to be within the scope of the collaborative arrangement guidance or if they are more reflective of a vendor-customer relationship and, therefore, within the scope of Topic 606. This assessment is performed throughout the life of the arrangement based on changes in the responsibilities of all parties in the arrangement.

For elements of collaboration arrangements that are not accounted for pursuant to guidance in Topic 606, an appropriate recognition method is determined and applied consistently, generally by analogy to the revenue from contracts with customers guidance.

14

2. Basis of Presentation and Significant Accounting Policies (continued).

The Company evaluates the performance obligations promised in the contract that are based on goods and services that will be transferred to the customer and determines whether those obligations are both (i) capable of being distinct and (ii) distinct in the context of the contract. Goods or services that meet these criteria are considered distinct performance obligations. The Company estimates the transaction price based on the amount expected to be received for transferring the promised goods or services in the contract. The consideration may include fixed consideration or variable consideration.

The agreements provide for milestone payments upon achievement of development and regulatory events. The Company accounts for milestone payments as variable consideration in accordance with Topic 606. At the inception of each arrangement that includes variable consideration, the Company evaluates the amount of potential transaction price and the likelihood that the transaction price will be received. The Company utilizes either the most likely amount method or expected value method to estimate the amount expected to be received based on which method best predicts the amount expected to be received. The amount of variable consideration that is included in the transaction price may be constrained and is included in the transaction price only to the extent that it is probable that a significant reversal in the amount of the cumulative revenue recognized will not occur in a future period. Arrangements that include rights to additional goods or services that are exercisable at a customer’s discretion are generally considered options. The Company assesses if these options provide a material right to the customer and, if so, these options are considered performance obligations.

After contract inception, the transaction price is reassessed at every period end and updated for changes such as resolution of uncertain events. Any change in the overall transaction price is allocated to the performance obligations based on the same methodology used at contract inception.

The Company recognizes sales-based royalties or net profit-sharing when the latter of (a) the subsequent sale occurs, or (b) the performance obligation to which the sales-based royalty or net profit-sharing has been allocated has been satisfied.

Payments to and from the collaborator are presented in the statement of operations based on the nature of the Company’s business operations, the nature of the arrangement, including the contractual terms, and the nature of the payments.

Refer to Note 11 (Collaborative and Licensing Arrangements), for further discussion on the Company’s collaborative and licensing arrangements.

q. RESEARCH AND DEVELOPMENT. Costs incurred in connection with research and development activities are expensed as incurred. These costs consist of direct and indirect costs associated with specific projects, as well as fees paid to various entities that perform research-related services for the Company.

The Company records upfront and milestone payments made to third parties under licensing and collaboration arrangements that occur before a compound receives regulatory approval as acquired in-process research and development (IPR&D). IPR&D acquired as part of an asset acquisition with no alternative future use is expensed immediately to research and development. Milestone payments made after regulatory approval are capitalized as a developed asset and unless the asset is determined to have an indefinite life, the Company amortizes its definite-lived intangible assets using the straight-line method, which is considered the best estimate of economic benefit, over its estimated useful life.

r. ADVERTISING EXPENSE. Advertising costs are expensed as incurred. The Company incurred $3.9 million and $1.7 million in advertising costs during the three months ended March 31, 2024 and 2023, respectively, which are included in selling, general and administrative expenses in the Company’s consolidated statements of operations and comprehensive income.

s. STOCK-BASED COMPENSATION. The Company recognizes expense in the consolidated statements of operations and comprehensive income for the grant date fair value of all stock-based payments to employees, directors and consultants, including grants of stock options and other share-based awards. For stock options, the Company uses the Black-Scholes option valuation model, the single-option award approach, and the straight-line attribution method. Using this approach, compensation cost is amortized on a straight-line basis over the vesting period of each respective stock option, generally one to three years. Forfeitures are recognized as a reduction of stock-based compensation expense as they occur.

t. CONCENTRATION OF RISK. The financial instruments that potentially subject the Company to concentration of credit risk are cash equivalents, investments and accounts receivable, net. The Company places its cash and cash equivalents with high-credit quality financial institutions. These amounts at times may exceed federally insured limits. The Company has not experienced any credit losses in these accounts.

The Company sells its products, FIRDAPSE® and AGAMREE®, in the U.S. through an exclusive distributor (its Customer) to SPs. Therefore, its distributor and SPs account for principally all of its trade receivables and net product revenues related to this product. The Company sells its product, FYCOMPA® to major wholesalers, specialty pharmaceutical distributors, managed care organizations, and government agencies. The creditworthiness of its customers is continuously monitored, and the Company has internal policies regarding customer credit limits. The Company estimates an allowance for expected credit loss primarily based on the credit worthiness of its customers, historical payment patterns, aging of receivable balances and general economic conditions.

15

2. Basis of Presentation and Significant Accounting Policies (continued).

As of March 31, 2024, the Company had three FDA approved products, which makes it difficult to evaluate its current business, predict its future prospects, and forecast financial performance and growth. The Company had invested a significant portion of its efforts and financial resources in the development and commercialization of its lead product, FIRDAPSE®. The Company expects FIRDAPSE® and the recently acquired products FYCOMPA® and AGAMREE® to constitute virtually all of the Company’s product revenue for the foreseeable future.

The Company relies exclusively on third parties to formulate and manufacture its products and any future drug candidates. The commercialization of its products and any other drug candidates, if approved, could be stopped, delayed or made less profitable if those third parties fail to provide sufficient quantities of product or fail to do so at acceptable quality levels or prices. The Company does not intend to establish its own manufacturing facilities. The Company is using the same third-party contractors to manufacture, supply, store and distribute drug supplies for clinical trials and for the commercialization of FIRDAPSE®. The Company relies on the same third-party manufacturers for FYCOMPA® as utilized by Eisai prior to the Company’s acquisition in January 2023. It also relies on Santhera as its sole source of supply for AGAMREE®. If the Company is unable to continue its relationships with one or more of these third-party contractors, it could experience delays in the development or commercialization efforts as it locates and qualifies new manufacturers. The Company intends to rely on one or more third-party contractors to manufacture the commercial supply of its drugs.

The following table illustrates the approximate percentage of the Company’s total net product revenue attributed to the Company’s largest customers for the periods presented:

	For the Three Months Ended March 31,
	2024			2023
Customer A		69.1	%		67.4	%
Customer B*		—			32.6	%
Customer C		10.5	%		—
Customer D		10.1	%		—
Total		89.7	%		100.0	%

*During 2023, the Company sold FYCOMPA® through a Transition Service Agreement with Eisai. Effective January 1, 2024, FYCOMPA® is being sold and distributed through a 3PL organization.

u. ROYALTIES. Royalties incurred in connection with the Company’s license agreement for FIRDAPSE® and AGAMREE®, as disclosed in Note 13 (Agreements), are expensed to cost of sales as revenue from product sales is recognized.

Royalties incurred in connection with the Company’s license agreement for RUZURGI®, as disclosed in Note 13 (Agreements), are expensed to cost of sales as revenue from product sales is recognized for any royalties in excess of the minimum annual royalty payment from July 11, 2022 (the Effective Date) through 2025. The minimum royalty payment that exists annually for calendar years from the Effective Date through 2025 of $3 million are included in the purchase price of the agreement.

v. INCOME TAXES. The Company utilizes the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on differences between the financial reporting and tax basis of assets and liabilities and are measured using enacted tax rates and laws that will be in effect when the differences are expected to reverse. A valuation allowance is provided when it is more likely than not that some portion or all of a deferred tax asset will not be realized.

The Company recognizes the financial statement benefit of a tax position only after determining that the relevant tax authority would more likely than not sustain the position following an audit. For tax positions meeting the more-likely-than-not threshold, the amount recognized in the financial statements is the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement with the relevant tax authority. The Company is subject to income taxes in the U.S. federal jurisdiction and various state jurisdictions. Tax regulations within each jurisdiction are subject to the interpretation of the related tax laws and regulations and require significant judgment to apply. The Company is not subject to U.S. federal, state and local tax examinations by tax authorities for years before 2020. If the Company were to subsequently record an unrecognized tax benefit, associated penalties and tax related interest expense would be reported as a component of income tax expense.

16

2. Basis of Presentation and Significant Accounting Policies (continued).

w. COMPREHENSIVE INCOME. U.S. GAAP requires that all components of comprehensive income be reported in the financial statements in the period in which they are recognized. Comprehensive income is net income, plus certain other items that are recorded directly into stockholders’ equity. The Company’s comprehensive income is shown on the consolidated statements of operations and comprehensive income for the three months ended March 31, 2024 and 2023, and is comprised of net unrealized gains (losses) on the Company’s available-for-sale securities.

x. NET INCOME PER COMMON SHARE. Basic net income per share is computed by dividing net income for the period by the weighted average number of common shares outstanding during the period. With regard to common stock subject to vesting requirements, the calculation includes only the vested portion of such stock and units.

Diluted net income per common share is computed by dividing net income by the weighted average number of common shares outstanding, increased by the assumed conversion of other potentially dilutive securities during the period.

The following table reconciles basic and diluted weighted average common shares:

	For the Three Months Ended March 31,
	2024		2023
Basic weighted average common shares outstanding		116,806,117		105,561,229
Effect of dilutive securities		6,597,509		8,424,900
Diluted weighted average common shares outstanding		123,403,626		113,986,129

Outstanding common stock equivalents totaling approximately 5.2 million and 1.3 million, were excluded from the calculation of diluted net income per common share for the three months ended March 31, 2024 and 2023, respectively, as their effect would be anti-dilutive.

y. SEGMENT INFORMATION. Management has determined that the Company operates in one reportable segment, which is the development and commercialization of drug products.

z. RECLASSIFICATIONS. Certain prior year amounts in the consolidated financial statements have been reclassified to conform to the current year presentation.

aa. RECENTLY ISSUED ACCOUNTING STANDARDS. The Company did not adopt any accounting standards during the quarter ended March 31, 2024.

In November 2023, the FASB issued ASU No. 2023-07, Improvements to Reportable Segment Disclosures (ASU 2023-07) which is intended to improve reportable segment disclosures primarily through enhanced disclosure of reportable segment expenses and requires that a public entity that has a single reportable segment provide all the disclosures required by ASU 2023-07 and all existing segment disclosures in Topic 280. The new guidance is required to be applied retrospectively to all prior periods presented in the financial statements and is effective for the Company for fiscal periods beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. The Company has one reportable segment and is evaluating the impact of the standard on the Company’s consolidated financial statements.

In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures which requires significant disclosures about income taxes, primarily focused on the disclosure of income taxes paid and the rate reconciliation table. The new guidance will be applied prospectively and is effective for the Company for fiscal periods beginning after December 15, 2024. The Company is evaluating the impact of the standard on the Company’s consolidated financial statements.

17

3. Investments.

Available-for-sale investments by security type were as follows (in thousands):

	Estimated Fair Value		Gross Unrealized Gains		Gross Unrealized Losses		Amortized Cost
At March 31, 2024:
U.S. Treasuries—Cash equivalents	$	—	$	—	$	—	$	—
Total	$	—	$	—	$	—	$	—
At December 31, 2023:
U.S. Treasuries—Cash equivalents	$	94,523	$	18	$	—	$	94,505
Total	$	94,523	$	18	$	—	$	94,505

There were no realized gains or losses from available-for-sale securities for the three months ended March 31, 2024 or 2023.

	For the Three Months Ended March 31,
	2024			2023
Equity securities:
Net gains (losses) recognized during the period on equity securities	$	(1,144	)	$	—
Unrealized net gains (losses) recognized during the period on equity securities still held at the reporting date	$	(1,144	)	$	—

There were no sales of equity securities during the three months ended March 31, 2024 and 2023. Unrealized net gains (losses) recognized during the periods on equity securities are included in other income, net in the consolidated statements of operations.

4. Accumulated Other Comprehensive Income.

The following table summarizes the changes in accumulated other comprehensive income, net of tax from unrealized gains (losses) on available-for-sale securities (in thousands), the Company’s only component of accumulated other comprehensive income for the three months ended March 31, 2024 and 2023.

There were no reclassifications out of accumulated other comprehensive income during the three months ended March 31, 2024 or 2023.

	Total Accumulated Other Comprehensive Income
Balance at December 31, 2023	$	14
Other comprehensive gain (loss) before reclassifications		(14	)
Amount reclassified from accumulated other comprehensive income		—
Net current period other comprehensive gain (loss)		(14	)
Balance at March 31, 2024	$	—

	Total Accumulated Other Comprehensive Income
Balance at December 31, 2022	$	24
Other comprehensive gain (loss) before reclassifications		(13	)
Amount reclassified from accumulated other comprehensive income		—
Net current period other comprehensive gain (loss)		(13	)
Balance at March 31, 2023	$	11

18

5. Inventory.

Inventory consists of the following (in thousands):

	March 31, 2024		December 31, 2023
Raw materials	$	5,926	$	1,910
Work-in-process		3,963		4,573
Finished goods		10,064		9,161
Total inventory	$	19,953	$	15,644

6. Prepaid Expenses and Other Current Assets.

Prepaid expenses and other current assets consist of the following (in thousands):

	March 31, 2024		December 31, 2023
Prepaid manufacturing costs	$	2,005	$	2,005
Prepaid tax		307		1,238
Prepaid insurance		952		1,332
Prepaid subscriptions fees		1,937		1,299
Prepaid research fees		1,513		1,500
Prepaid commercialization expenses		2,951		3,038
Due from collaborative and licensing arrangements		143		138
Prepaid conference and travel expenses		844		771
Prepaid co-pay assistance program		1,561		863
Other		1,532		351
Total prepaid expenses and other current assets	$	13,745	$	12,535

7. Operating Leases.

The Company has an operating lease agreement for its corporate office. The lease includes an option to extend the lease for up to 5 years and options to terminate the lease within 6 and 7.6 years. There are no obligations under finance leases.

The Company entered into an agreement in May 2020 that amended its lease for its office facilities. Under the amended lease, the Company’s leased space increased from approximately 7,800 square feet of space to approximately 10,700 square feet of space. The amended lease commenced in March 2021 when construction of the asset was completed and space became available for use.

The components of lease expense were as follows (in thousands):

	For the Three Months Ended March 31,
	2024		2023
Operating lease cost	$	108	$	108

Supplemental cash flow information related to lease was as follows (in thousands):

	For the Three Months Ended March 31,
	2024		2023
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows	$	129	$	125
Right-of-use assets obtained in exchange for lease obligations:
Operating lease	$	22	$	22

19

7. Operating Leases (continued).

Supplemental balance sheet information related to lease was as follows (in thousands):

	March 31, 2024		December 31, 2023
Operating lease right-of-use assets	$	2,440	$	2,508
Other current liabilities	$	377	$	369
Operating lease liabilities, net of current portion		3,091		3,188
Total operating lease liabilities	$	3,468	$	3,557

As of March 31, 2024 and December 31, 2023, the weighted average remaining lease term was 7.1 years and 7.3 years, respectively. The weighted average discount rate used to determine the operating lease liabilities was 4.51% as of March 31, 2024 and December 31, 2023.

Remaining payments of lease liabilities as of March 31, 2024 were as follows (in thousands):

2024 (remaining nine months)	$	394
2025		537
2026		553
2027		570
2028		587
Thereafter		1,440
Total lease payments		4,081
Less: imputed interest		(613	)
Total	$	3,468

Rent expense was approximately $0.1 million for each of the three-month periods ended March 31, 2024 and 2023.

8. Property and Equipment, Net.

Property and equipment, net consists of the following (in thousands):

	March 31, 2024			December 31, 2023
Furniture and equipment	$	692		$	494
Leasehold improvements		991			991
Software		433			433
Less: Accumulated depreciation		(808	)		(723	)
Total property and equipment, net	$	1,308		$	1,195

9. License and Acquired Intangibles, Net.

The following table presents the Company’s intangible assets at March 31, 2024 (in thousands):

	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Intangible assets:
License and acquired intangibles for RUZURGI®	$	33,569	$	3,998	$	29,571
License and acquired intangibles for FYCOMPA®		158,143		37,580		120,563
License and acquired intangibles for AGAMREE®		36,000		1,429		34,571
Total	$	227,712	$	43,007	$	184,705

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9. License and Acquired Intangibles, Net (continued).

The following table presents the Company’s intangible assets at December 31, 2023 (in thousands):

	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Intangible assets:
License and acquired intangibles for RUZURGI®	$	33,569	$	3,418	$	30,151
License and acquired intangibles for FYCOMPA®		158,143		29,673		128,470
License and acquired intangibles for AGAMREE®		36,000		572		35,428
Total	$	227,712	$	33,663	$	194,049

The Company amortizes its definite-lived intangible assets using the straight-line method, which is considered the best estimate of economic benefit, over its estimated useful life. The estimated useful life used for this purpose for RUZURGI®, FYCOMPA® and AGAMREE® was approximately 14.5 years, 5 years and 10.5 years, respectively.

The Company recorded approximately $0.6 million in amortization expense related to the licensed and acquired intangibles for RUZURGI® during each of the three months ended March 31, 2024 and 2023, within selling, general and administrative expenses in the consolidated statements of operations and comprehensive income. The Company recorded approximately $7.9 million and $6.0 million in amortization expense related to the licensed and acquired intangibles for FYCOMPA® during the three months ended March 31, 2024 and 2023, respectively, within cost of sales in the consolidated statement of operations and comprehensive income. The Company recorded approximately $0.9 million and $0 in amortization expense related to the licensed and acquired intangibles for AGAMREE® during the three months ended March 31, 2024 and 2023, respectively, within cost of sales in the consolidated statement of operations and comprehensive income. Amortization of the FYCOMPA®, RUZURGI® and AGAMREE® intangible assets are reported together as amortization of intangible assets in the consolidated statements of operations and comprehensive income.

The following table presents future amortization expense the Company expects for its intangible assets (in thousands):

2024 (remaining nine months)	$	28,034
2025		37,378
2026		37,378
2027		37,378
2028		7,705
Thereafter		36,832
Total	$	184,705

At March 31, 2024 and December 31, 2023, the weighted average amortization period remaining for intangible assets was 6.2 years and 6.5 years, respectively.

If all or a portion of the intangible assets are deemed not recoverable, the Company would estimate the fair value of the assets and record an impairment loss. There were no impairment charges recognized on definite-lived intangibles for the three months ended March 31, 2024 or 2023.

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10. Accrued Expenses and Other Liabilities.

Accrued expenses and other liabilities consist of the following (in thousands):

	March 31, 2024		December 31, 2023
Accrued preclinical and clinical trial expenses	$	527	$	1,015
Accrued professional fees		5,856		4,730
Accrued compensation and benefits		4,852		8,883
Accrued license fees		8,934		24,437
Accrued purchases		694		192
Operating lease liability		377		369
Accrued gross-to-net revenue liabilities*		24,885		6,877
Accrued income tax		7,340		729
Due to licensor		12,205		12,540
Accrued interest payable		1,204		1,031
Accrued charitable contributions		1,800		—
Other		631		465
Current accrued expenses and other liabilities		69,305		61,268
Lease liability – non-current		3,091		3,188
Due to licensor – non-current		1,859		2,497
Other – non-current		748		485
Non-current accrued expenses and other liabilities		5,698		6,170
Total accrued expenses and other liabilities	$	75,003	$	67,438

*During 2023, the Company sold FYCOMPA® through a Transition Service Agreement with Eisai. Effective January 1, 2024, FYCOMPA® is being sold and distributed through a 3PL organization.

11. Collaborative and Licensing Arrangements.

Endo, Inc.

In December 2018, the Company entered into a collaboration and license agreement (Collaboration) with Endo, Inc. (formerly, Endo International plc) (Endo), for the further development and commercialization of generic Sabril® (vigabatrin) tablets through Endo’s U.S. Generic Pharmaceuticals segment, doing business as Par Pharmaceutical, Inc. (Par). Under the Collaboration, Endo assumes all development, manufacturing, clinical, regulatory, sales and marketing costs under the collaboration, while the Company is responsible for exercising commercially reasonable efforts to develop, or cause the development of, a final finished, stable dosage form of generic Sabril® tablets.

In October 2023, Endo informed the Company that it has discontinued work on the Collaboration for development and commercialization of vigabatrin and that it wished to terminate the arrangement. As the Company proceeds with the termination process, the Company does not expect the end of the collaboration to have a material impact on the Company’s consolidated financial statements.

KYE Pharmaceuticals Inc.

In August 2020, the Company entered into a collaboration and license agreement with KYE Pharmaceuticals Inc. (KYE), for the commercialization of FIRDAPSE® in Canada.

Under the agreement, Catalyst granted KYE an exclusive license to commercialize and market FIRDAPSE® in Canada. KYE assumes all selling and marketing costs under the collaboration, while the Company is responsible for supply of FIRDAPSE® based on the collaboration partner’s purchase orders.

Under the terms of the agreement, the Company will receive an up-front payment, received payment upon transfer of Marketing Authorization and delivery of commercial product, received payment for supply of FIRDAPSE®, and will receive milestone payments and a sharing of defined net profits upon commercialization from KYE consisting of a mid-double-digit percent of net sales of FIRDAPSE®. The Company has also agreed to the sharing of certain development expenses. Unless terminated earlier in accordance with its terms, the collaboration continues in effect until the date that is ten years following the commercial launch of the product in Canada.

22

11. Collaborative and Licensing Arrangements (continued).

This agreement is in form identified as a collaborative agreement and the Company has concluded for accounting purposes that it also represents a contract with a customer. This is because the Company grants to KYE a license and provides supply of FIRDAPSE® in exchange for consideration, which are outputs of the Company’s ongoing activities. Accordingly, the Company has concluded that this collaborative arrangement will be accounted for pursuant to Topic 606.

The collaborative agreement included a nonrefundable upfront license fee that was recognized upon transfer of the license based on a determination that the right is provided as the intellectual property exists at the point in time in which the license is granted.

Revenue from sales of FIRDAPSE® by KYE is recognized in the quarter in which the sales occurred.

Revenues from the arrangement with KYE for the three months ended March 31, 2024 and 2023 were not material. Revenue is included in license and other revenue in the accompanying consolidated statements of operations and comprehensive income. Expenses incurred, net have been included in selling, general and administrative expenses in the accompanying consolidated statements of operations and comprehensive income.

DyDo Pharma, Inc.

On June 28, 2021, the Company entered into a license agreement with DyDo Pharma, Inc. (DyDo), for the development and commercialization of FIRDAPSE® in Japan.

Under the agreement, DyDo has joint rights to develop FIRDAPSE®, and exclusive rights to commercialize the product, in Japan. DyDo is responsible for funding all clinical, regulatory, marketing and commercialization activities in Japan, while the Company is responsible for clinical and commercial supply based on purchase orders, as well as providing support to DyDo in its efforts to obtain regulatory approval for the product from the Japanese regulatory authorities.

Under the terms of the agreement, the Company has earned an up-front payment and may earn further development and sales milestones for FIRDAPSE®, as well as revenue on product supplied to DyDo.

The Company has concluded that this license agreement will be accounted for pursuant to Topic 606. The agreement included a nonrefundable upfront license fee that was recognized upon the effective date of the agreement as the intellectual property exists at the point in time in which the right to the license is granted. The Company determined the granting of the right to the license is distinct from the supply of FIRDAPSE® and represents a separate performance obligation in the agreement.

The agreement includes milestones that are considered a sales-based royalty in which the license is deemed to be the predominant item to which these milestones relate. Revenue will be recognized when the latter of (a) the subsequent sale occurs, or (b) the performance obligation to which the sales-based royalty has been allocated has been satisfied. Additionally, the agreement includes regulatory milestone payments which represent variable consideration, and due to uncertainty are fully constrained and only recognized when the uncertainty is subsequently resolved. For clinical and commercial supply of the product, the Company will recognize revenue when the Customer obtains control of the Company’s product, which will occur at a point in time which is generally at time of shipment.

There was $0 and $0.2 million in revenue from the arrangement with DyDo for the three months ended March 31, 2024 and 2023, respectively, which is included in product revenue, net in the accompanying consolidated statements of operations and comprehensive income.

12. Commitments and Contingencies.

In May 2019, the FDA approved a NDA for RUZURGI®, Jacobus Pharmaceuticals’ version of amifampridine (3,4-DAP), for the treatment of pediatric LEMS patients (ages 6 to under 17). In June 2019 the Company filed suit against the FDA and several related parties challenging this approval and related drug labeling. Jacobus later intervened in the case. The Company’s complaint, which was filed in the federal district court for the Southern District of Florida, alleged that the FDA’s approval of RUZURGI® violated multiple provisions of FDA regulations regarding labeling, resulting in misbranding in violation of the Federal Food, Drug, and Cosmetic Act (FDCA); violated the Company’s statutory rights to Orphan Drug Exclusivity and New Chemical Entity Exclusivity under the FDCA; and was in multiple other respects arbitrary, capricious, and contrary to law, in violation of the Administrative Procedure Act. Among other remedies, the suit sought an order vacating the FDA’s approval of RUZURGI®.

23

12. Commitments and Contingencies (continued).

On July 30, 2020, the Magistrate Judge considering this lawsuit filed a Report and Recommendation in which the Magistrate Judge recommended to the District Judge handling the case that the District Judge grant the FDA’s and Jacobus’ motions for summary judgment and deny the Company’s motion for summary judgment. On September 29, 2020, the District Judge adopted the Report and Recommendation of the Magistrate Judge, granted the FDA’s and Jacobus’ motions for summary judgment, and dismissed the Company’s case. The Company appealed the District Court’s decision to the U.S. Court of Appeals for the 11th Circuit. The case was fully briefed in early 2021, and oral argument was held in March 2021.

On September 30, 2021, a three-judge panel of 11th Circuit judges issued a unanimous decision overturning the District Court’s decision. The appellate court adopted the Company’s argument that the FDA’s approval of RUZURGI® violated the Company’s rights to Orphan Drug Exclusivity and remanded the case to the District Court with orders to enter summary judgment in the Company’s favor. In November 2021, Jacobus filed a motion seeking rehearing of the case from the full 11th Circuit, which motion was denied in January 2022. Further, in January 2022, Jacobus filed motions with both the 11th Circuit and the U.S. Supreme Court seeking a stay of the 11th Circuit’s ruling indicating that it would seek a review of the 11th Circuit’s decision from the U.S. Supreme Court. Both stay motions were denied, and on January 28, 2022, the 11th Circuit issued a mandate directing the District Court to enter summary judgment in the Company’s favor. The District Court entered that order on January 31, 2022. On February 1, 2022, the FDA informed Jacobus that, consistent with the Court of Appeals for the Eleventh Circuit’s September 30, 2021, decision in favor of Catalyst, the final approval of the RUZURGI® NDA was switched to a tentative approval until the 7-year orphan-drug exclusivity (ODE) for FIRDAPSE® has expired.

On July 11, 2022, the Company settled certain of its disputes with Jacobus. In connection with the settlement, the Company licensed the rights to develop and commercialize RUZURGI® in the U.S. and Mexico (the Territory). Simultaneously, the Company purchased, among other intellectual property rights, Jacobus’ U.S. patents related to RUZURGI®, its new drug applications in the U.S. for RUZURGI®, and certain RUZURGI® inventory previously manufactured by Jacobus. At the same time, the Company received a license from Jacobus for use of its know-how related to the manufacture of RUZURGI®. Further, the Company settled its patent case against Jacobus, which was dismissed without prejudice. Finally, Jacobus agreed that until the later of (i) the expiration of the royalty term or (ii) December 31, 2034, Jacobus and its affiliates, will not, directly or indirectly, research, develop, manufacture, commercialize, distribute, use or otherwise exploit any product competitive to FIRDAPSE® or RUZURGI® in the Territory, and Laura Jacobus, the sole shareholder of Jacobus, and two of Jacobus’ other officers, also signed individual non-competition agreements containing the same terms.

In connection with the settlement with Jacobus, the Company agreed to pay the following consideration to Jacobus:

• $30 million of cash, of which $10 million was paid at the closing of the settlement on July 11, 2022, $10 million was paid on the first anniversary of closing, and the remaining $10 million will be paid on the second anniversary of closing;

• An annual royalty on our net sales (as defined in the License and Asset Purchase Agreement between Catalyst and Jacobus) of amifampridine products in the U.S. equal to: (a) for calendar years 2022 through 2025, 1.5% (with a minimum annual royalty of $3.0 million per year), and (b) for calendar years 2026 through the expiration of the last to expire of the Company’s FIRDAPSE® patents in the U.S., 2.5% (with a minimum annual royalty of $5 million per year); provided, however, that the royalty rate may be reduced and the minimum annual royalty may be eliminated under certain circumstances; and

• If the Company were to receive a priority review voucher for FIRDAPSE® or RUZURGI® in the future, 50% of the consideration paid by a third-party to acquire that voucher will be paid to Jacobus.

The Company’s New Drug Submission filing for FIRDAPSE® for the symptomatic treatment of LEMS was approved when Health Canada issued a Notice of Compliance, or NOC, on July 31, 2020. In August 2020, the Company entered into a license agreement with KYE Pharmaceuticals, or KYE, pursuant to which the Company licensed to KYE the Canadian rights for FIRDAPSE® for the treatment of LEMS. On August 10, 2020, Health Canada issued a NOC to Medunik (Jacobus’ licensee in Canada for RUZURGI®) for the treatment of LEMS. Shortly thereafter, the Company initiated a legal proceeding in Canada seeking judicial review of Health Canada’s decision to issue the NOC for RUZURGI® as incorrect and unreasonable under Canadian law due to Medunik’s use of Catalyst’s protected data in its application. After two decisions by the trial judge to quash the RUZURGI® approval and remand the matter back to Health Canada, the Canadian Federal Appellate Court overturned the trial judge’s decision. The Minister subsequently reapproved RUZURGI®’s NOC for Canada in 2023. The Company does not expect the approval of RUZURGI® in Canada to have a material impact on the Company’s consolidated financial statements.

24

12. Commitments and Contingencies (continued).

In January 2023, the Company received Paragraph IV Certification Notice Letters from three generic drug manufacturers advising that they had each submitted an Abbreviated New Drug Application (ANDA) to the FDA seeking authorization from the FDA to manufacture, use or sell a generic version of FIRDAPSE® in the U.S. The notice letters each alleged that the six patents listed in the FDA Orange Book covering FIRDAPSE® are not valid, not enforceable, and/or will not be infringed by the commercial manufacture, use or sale of the proposed product described in these ANDA submissions. Under the FDCA, as amended by the Drug Price Competition and Patent Term Restoration Act of 1984, as amended, the Company had 45 days from receipt of the notice letters to commence patent infringement lawsuits against these generic drug manufacturers in a federal district court to trigger a stay precluding the FDA from approving any ANDA until May 2026 or entry of judgment holding the patents invalid, unenforceable, or not infringed, whichever occurs first. In that regard, after conducting the necessary due diligence, the Company filed lawsuits on March 1, 2023 in the U.S. District Court for the District of New Jersey against each of the three generic drug manufacturers who notified the Company of their ANDA submissions, thus triggering the stay. Further, in October 2023, the Company received a Paragraph IV Certification Notice Letter from a fourth generic drug manufacturer, and the Company filed a similar lawsuit against the manufacturer in November 2023. The Company intends to vigorously protect and defend its intellectual property for FIRDAPSE® and, although there can be no assurance, the Company believes that its patent estate will protect FIRDAPSE® from generic competition for the life of the patents.

On February 20, 2023, the Company received a Paragraph IV Certification Notice Letter from a company that appears to have filed the first ANDA for the oral suspension formulation for FYCOMPA®. The same company sent a similar letter to the Company later in February with a similar certification for the tablet formulation for FYCOMPA®, the fourth such certification for this formulation. Both of these letters were paragraph IV certifications of non-infringement, non-validity, and unenforceability to the ‘497 patent for FYCOMPA® but each application, like the previous Paragraph IV notices from ANDA filers, for FYCOMPA® tablets does not challenge the ‘571 patent. Similar to the actions with the FIRDAPSE® Paragraph IV Certifications described above, after due diligence the Company filed lawsuits on April 5, 2023, in the U.S. District Court for the District of New Jersey against the drug manufacturer who notified the Company of their ANDA submissions for both FYCOMPA® formulations, thus triggering the 30-month stay for each application.

Additionally, from time to time the Company may become involved in legal proceedings arising in the ordinary course of business. Except as set forth above, the Company believes that there is no other litigation pending at this time that could have, individually or in the aggregate, a material adverse effect on its results of operations, financial condition, or cash flows.

13. Agreements.

a. LICENSE AGREEMENT FOR FIRDAPSE®. On October 26, 2012, the Company entered into a license agreement with BioMarin Pharmaceutical, Inc. (BioMarin) for the North American rights to FIRDAPSE®. Under the license agreement, the Company pays: (i) royalties to the licensor for seven years from the first commercial sale of FIRDAPSE® equal to 7% of net sales (as defined in the license agreement) in North America for any calendar year for sales up to $100 million, and 10% of net sales in North America in any calendar year in excess of $100 million; and (ii) royalties to the third-party licensor of the rights sublicensed to the Company for seven years from the first commercial sale of FIRDAPSE® equal to 7% of net sales (as defined in the license agreement between BioMarin and the third-party licensor) in any calendar year for the duration of any regulatory exclusivity within a territory and 3.5% for territories in any calendar year in territories without regulatory exclusivity.

On May 29, 2019, the Company and BioMarin entered into an amendment to the Company’s license agreement for FIRDAPSE®. Under the amendment, the Company has expanded its commercial territory for FIRDAPSE®, which originally was comprised of North America, to include Japan. Additionally, the Company’s commercial territory will be expanded under the license agreement to include most of Asia, as well as Latin America, upon the acceptance by the Pharmaceuticals and Medical Devices Agency (PMDA) of a Japan MAA for FIRDAPSE® for LEMS. Under the amendment, the Company will pay royalties to our licensor on net sales in Japan of a similar percentage to the royalties that the Company is currently paying under its original license agreement for North America.

On December 18, 2023, DyDo filed a Japan NDA with the PMDA, which was accepted for filing upon its submission. As a result, the Company’s territory automatically expanded on that date to include most of Asia, as well as Latin America.

In January 2020, the Company was advised that BioMarin has transferred substantially all of its rights under the license agreement to SERB S.A., and SERB S.A. is now the Company’s licensor under the license agreement.

25

13. Agreements (continued).

b. LICENSE AGREEMENT FOR RUZURGI®. On July 11, 2022 (the Effective Date), the Company entered into an exclusive license agreement with Jacobus Pharmaceutical Company, Inc. (Jacobus), for the rights to develop and commercialize RUZURGI® in the U.S. and Mexico.

Pursuant to the terms of the license agreement, the Company paid Jacobus a $10 million up-front payment on the Effective Date and also paid an additional $10 million on the first annual anniversary of the Effective Date (July 11, 2023). The Company is obligated to pay an additional $10 million on the second annual anniversary of the Effective Date (July 11, 2024). The Company is also obligated to pay tiered royalty payments on net sales (as defined in the license agreement) of all of the Company’s products in the U.S. that range from 1.25% to 2.5% based on whether there is a competing product or generic version of FIRDAPSE® being marketed or sold in the U.S.

A minimum royalty payment exists annually for calendar years from the Effective Date through 2025 of $3 million, provided that such minimum annual royalty payment shall be prorated in the first calendar year of the agreement. As these minimum payments are both probable and estimable, they are included in the purchase price of the agreement and any royalties in excess of this amount will be charged to cost of sales as revenue from product sales is recognized. A minimum royalty payment exists annually for calendar years from 2026 through the expiration of the royalty term (which ends when there is no valid claim under the Company’s FIRDAPSE® patents in the U.S.) of $5 million unless a competing product or generic version of FIRDAPSE® is being marketed or sold in the U.S. If these minimum payments become probable in the future, the Company would recognize a contingent liability at that time with an offset to the value of the intangible asset acquired. Any royalties in excess of this amount will be charged to cost of sales as revenue from product sales is recognized. Royalties over the minimum, if any, will be paid based on the agreement terms on a quarterly basis.

Assets acquired as part of the license agreement include among other intellectual property rights, Jacobus’ U.S. patents related to RUZURGI®, its new drug applications in the U.S. for RUZURGI®, its Trademark for RUZURGI®, the Orphan Drug Designation for RUZURGI® and a license from Jacobus for use of its know-how related to the manufacture of RUZURGI®.

Additionally, the Company also purchased from Jacobus approximately $4.1 million of RUZURGI® inventory previously manufactured by Jacobus, which were recorded as an expense in research and development expenses in the consolidated statement of operations and comprehensive income for 2022.

Under business combination guidance, the screen test states that if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets, the set is not considered a business and is accounted for as an asset acquisition. The Company has determined that the screen test was not met. However, the Company determined that the acquisition did not meet the definition of a business under ASC 805, Business Combination. The Company believes that the licensing agreement and other assets acquired from Jacobus are similar and considered them all to be intangible assets with the exception of the inventory acquired. As the screen test was not met, further determination was required to determine that the Company had not acquired inputs and processes that have the ability to create outputs, which would meet the requirements of a business, and therefore, determined that this was an asset acquisition. The Company accounted for the Jacobus license agreement as an asset acquisition under ASC 805-50, which requires the acquiring entity in an asset acquisition to recognize assets acquired and liabilities assumed based on the cost to the acquiring entity on a relative fair value basis, which includes consideration given.

The total purchase price was allocated to the acquired assets based on their relative fair values, as follows (in thousands):

License and acquired intangibles	$	33,569
Acquired research and development inventory expensed from asset acquisition		4,130
Total purchase price	$	37,699

The straight-line method is used to amortize the license and acquired intangibles, as disclosed in Note 9 (License and Acquired Intangibles, Net).

26

13. Agreements (continued).

c. ACQUISITION OF U.S. RIGHTS FOR FYCOMPA®. On January 24, 2023, the Company acquired the U.S. Rights for FYCOMPA® (perampanel) CIII a commercial stage epilepsy asset, from Eisai Co., Ltd. (Eisai). The aggregate consideration for the acquisition was $164.2 million in cash, including the reimbursement of certain liabilities and the payment of transaction costs.

Eisai was eligible to receive a contingent payment of $25 million if a certain regulatory milestone was met. As meeting the regulatory milestone was not probable, the Company did not recognize any amount related to the milestone payments in the purchase price. Additionally, after the loss of patent exclusivity for FYCOMPA®, the Company may be obligated to pay certain royalties to Eisai on net sales of FYCOMPA®. As the transaction is accounted for as an asset acquisition under U.S. GAAP, the Company will recognize the royalty payments in cost of sales as revenue from product sales is recognized.

Royalties commencing on loss of exclusivity for each calendar year during the royalty term equal to 12% on net sales greater than $10 million and less than $100 million, 17% on net sales of greater than $100 million and less than $125 million and 22% on net sales greater than $125 million prior to the date of generic entry. Royalties equal to 6% on net sales greater than $10 million and less than $100 million, 8.5% on net sales of greater than $100 million and less than $125 million and 11% on net sales greater than $125 million after the date of generic entry.

The following table summarizes the aggregate amount paid for the assets acquired by the Company in connection with the acquisition of FYCOMPA® (in thousands):

Base cash payment	$	160,000
Cash paid for pro-rated prepaid expenses		1,576
Reimbursement on base purchase price(i)		(3,238	)
Transaction costs(ii)		5,870
Total purchase consideration	$	164,208

(i) Recorded in prepaid expenses and other current assets in the accompanying consolidated balance sheet as of the acquisition date and reimbursement was fully applied as of June 30, 2023.

(ii) As of March 31, 2024, the full $5.9 million has been paid in cash.

The acquisition of FYCOMPA® has been accounted for as an asset acquisition in accordance with FASB ASC 805-50. The Company accounted for the acquisition of FYCOMPA® as an asset acquisition because substantially all of the fair value of the assets acquired is concentrated in a single asset, the FYCOMPA® product rights. The FYCOMPA® products rights consist of certain patents and trademarks, at-market contracts and regulatory approvals, marketing assets, and other records, and are considered a single asset as they are inextricably linked. ASC 805-10-55-5A includes a screen test, which provides that if substantially all of the fair value of the assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets, the assets acquired are not considered to be a business. ASC 805 requires the acquiring entity in an asset acquisition to recognize assets acquired and liabilities assumed based on the cost to the acquiring entity on a relative fair value basis, which includes consideration given.

The total purchase price was allocated to the acquired assets based on their relative fair values, as follows (in thousands):

Inventory	$	4,100
Prepaid expenses and other current assets (samples)		130
Prepaid commercialization expenses		1,576
Property and equipment, net		433
License and acquired intangibles for FYCOMPA®		158,143
Accrued preclinical and clinical trial expenses		(174	)
Total purchase consideration	$	164,208

The straight-line method is used to amortize the license and acquired intangibles, as disclosed in Note 9 (License and Acquired Intangibles, Net).

27

13. Agreements (continued).

d. LICENSE AGREEMENT FOR AGAMREE® (VAMOROLONE). In July 2023, the Company completed its acquisition from Santhera of an exclusive license for North America for AGAMREE® (vamorolone), a treatment for patients suffering with DMD which was approved by the FDA on October 26, 2023. On March 13, 2024, the Company announced the U.S. commercial launch of AGAMREE® for the treatment of DMD in patients aged two years or older. The license is for exclusive commercial rights in the U.S., Canada, and Mexico, as well as the right of first negotiation in Europe and Japan should Santhera pursue partnership opportunities in those jurisdictions. Additionally, the Company will hold North American rights for any future approved indications of AGAMREE®. The Company made an all-cash initial payment of $75 million at the closing of the acquisition to acquire the license.

Under the license agreement, the Company pays: (i) royalties to the licensor until the later of expiration of product exclusivity or ten years from the first commercial sale of AGAMREE® equal to 5% of net sales (as defined in the license agreement) in North America for any calendar year for sales equal to or less than $100 million (prior to December 31, 2025 only), 7% of net sales for sales in excess of $100 million and up to $200 million, 9% of net sales for sales in excess of $200 million and up to $300 million, 11% of net sales for sales in excess of $300 million; and (ii) royalties to the third-party licensor of the rights sublicensed to the Company until the later of expiration of product exclusivity or ten years from the first commercial sale of AGAMREE® equal to 7% of net sales (as defined in the license agreement) in North America for any single calendar year for sales equal to or less than $250 million, 8.5% of net sales for sales in excess of $250 million and up to $500 million, 10% of net sales for sales in excess of $500 million and up to $750 million, 12% of net sales for sales in excess of $750 million and up to $1 billion, 13% of net sales for sales in excess of $1 billion and up to $2 billion and 15% of net sales for sales in excess of $2 billion. Furthermore, the Company may pay Santhera sales-based milestones of up to $105 million as well as up to 11% percent royalties for all additional indications and milestones of up to $50 million for the first three additional indications.

Simultaneously, the Company made a strategic equity investment into Santhera by acquiring 1,414,688 of Santhera’s post reverse-split ordinary shares (representing approximately 11.26% of Santhera’s outstanding ordinary shares following the transaction), which are traded on the SIX Swiss Exchange, at an investment price of CHF 9.477 per share (corresponding to a mutually agreed volume-weighted average price prior to signing), with the funds invested into Santhera to be used by Santhera for Phase IV studies in DMD and further development of additional indications for AGAMREE®. The Company may also be obligated under certain circumstances to make milestone payments and to pay royalties to Santhera.

The following table summarizes the aggregate amount paid for the assets acquired by the Company in connection with the acquisition of AGAMREE® and the strategic equity investment (in thousands):

Initial cash payment	$	75,000
Investment in Santhera		13,465
Transaction costs		6,513
Total purchase consideration	$	94,978

The transaction has been accounted for as an asset acquisition in accordance with ASC 805-50. The Company accounted for the transaction as an asset acquisition because substantially all of the fair value of the assets acquired is concentrated in a single asset, the rights to develop, commercialize and manufacture AGAMREE®. The AGAMREE® rights consist of certain licenses and regulatory approvals and are considered a single asset as they are inextricably linked. ASC 805-10-55-5A includes a screen test, which provides that if substantially all of the fair value of the assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets, the assets acquired are not considered to be a business. Additionally, the Company did not acquire a substantive process. ASC 805 requires the acquiring entity in an asset acquisition to recognize assets acquired and liabilities assumed based on the cost to the acquiring entity on a relative fair value basis, which includes consideration given. Goodwill is not recognized in an asset acquisition and any excess consideration transferred over the fair value of the net assets acquired is allocated to the non-financial assets based on relative fair values.

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13. Agreements (continued).

The total purchase price was allocated to the acquired assets based on their relative fair values, as follows (in thousands):

License and acquired intangibles for AGAMREE® (vamorolone) (IPR&D)	$	81,513
Investment in Santhera(i)		13,465
Total purchase consideration	$	94,978

(i) The fair value of the investment in Santhera was determined based on the closing market price (CHF 8.25) of Santhera shares and the exchange rate (1.1537) of CHF to USD on the date the shares were transferred, July 19, 2023.

In accordance with FASB ASC 730-10-25, as AGAMREE® (vamorolone) had not achieved regulatory approval when acquired, the portion of the purchase price allocated to the IPR&D asset acquired (which includes all transaction costs related to the transactions with Santhera) was immediately expensed to research and development. Milestone payments made are either expensed as research and development or capitalized as a developed asset based on when regulatory approval is obtained. As the transaction is accounted for as an asset acquisition under U.S. GAAP, the Company will recognize all sales-based milestone and royalty payments in cost of sales as revenue from product sales is recognized.

Following the approval of the NDA for AGAMREE® on October 26, 2023, the Company became obligated to make a milestone payment of $36 million to Santhera. The $36 million payment was made during the fourth quarter of 2023. The Company capitalized the $36 million payment which is amortized using the straight-line method over the product’s estimated useful life of 10.5 years.

The strategic equity investment in Santhera is accounted for as an investment in equity securities, and is recognized as a non-current asset, as the Company does not intend on selling the shares within 12 months. Since Santhera shares have a readily determinable fair value, the investment will be measured quarterly at fair value with changes reported in earnings in other income, net in the accompanying consolidated statement of operations and comprehensive income.

e. AGREEMENTS FOR DRUG MANUFACTURING, DEVELOPMENT, PRECLINICAL AND CLINICAL STUDIES. The Company has entered into agreements with contract manufacturers for the manufacture of commercial drug and drug and study placebo for the Company’s trials and studies, with contract research organizations (CRO) to conduct and monitor the Company’s trials and studies and with various entities for laboratories and other testing related to the Company’s trials and studies. The contractual terms of the agreements vary, but most require certain advances as well as payments based on the achievement of milestones. Further, these agreements are cancellable at any time, but obligate the Company to reimburse the providers for any time or costs incurred through the date of termination.

14. Income Taxes.

The Company’s effective income tax rate was 20.0% and 20.8% for the three months ended March 31, 2024 and 2023, respectively. Differences in the effective tax and the statutory federal income tax rate of 21% are driven by state income taxes and anticipated annual permanent differences offset by equity compensation deductions.

The Company had no uncertain tax positions as of March 31, 2024 and December 31, 2023.

15. Stockholders’ Equity.

Preferred Stock

The Company has 5,000,000 shares of authorized preferred stock, $0.001 par value per share, at March 31, 2024 and December 31, 2023. No shares of preferred stock were outstanding at March 31, 2024 and December 31, 2023.

Common Stock

The Company has 200,000,000 shares of authorized common stock, par value $0.001 per share. At March 31, 2024 and December 31, 2023, 118,029,526 and 107,121,549 shares, respectively, of common stock were issued and outstanding. Each holder of common stock is entitled to one vote of each share of common stock held of record on all matters on which stockholders generally are entitled to vote.

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15. Stockholders’ Equity (continued).

Share Repurchases

In March 2021, the Company’s Board of Directors approved a share repurchase program that authorizes the repurchase of up to $40 million of the Company’s common stock, pursuant to a repurchase plan under Rule 10b-18 of the Securities Act. The share repurchase program commenced on March 22, 2021. No shares were repurchased during the three months ended March 31, 2024 and 2023.

2020 Shelf Registration Statement

On July 23, 2020, the Company filed a shelf registration statement with the SEC to sell up to $200 million of common stock, preferred stock, warrants to purchase common stock, debt securities and units consisting of one or more of such securities (the “2020 Shelf Registration Statement”). The 2020 Shelf Registration Statement (file no. 333-240052) was declared effective by the SEC on July 31, 2020. The Company’s 2020 Shelf Registration Statement expired on July 31, 2023.

2023 Shelf Registration Statement

On September 8, 2023, the Company filed a shelf registration statement with the SEC to sell up to $500 million of common stock, preferred stock, warrants to purchase common stock, debt securities and units consisting of one or more of such securities (the “2023 Shelf Registration Statement”). The 2023 Shelf Registration Statement (file no. 333-274427) became effective upon filing. On January 9, 2024, the Company completed a public offering of 10 million shares of its common stock, raising net proceeds of approximately $140.7 million under the Company’s 2023 Shelf Registration Statement.

16. Stock Compensation.

For the three months ended March 31, 2024 and 2023, the Company recorded stock-based compensation expense as follows (in thousands):

	2024		2023
Research and development	$	509	$	339
Selling, general and administrative		7,739		2,553
Total stock-based compensation	$	8,248	$	2,892

Stock Options

As of March 31, 2024, there were outstanding stock options to purchase 14,241,187 shares of common stock, of which stock options to purchase 8,869,384 shares of common stock were exercisable as of March 31, 2024.

During the three months ended March 31, 2024 and 2023, the Company granted seven-year term options to purchase an aggregate of 793,495 and 340,500 shares, respectively, of the Company’s common stock to employees. The Company recorded stock-based compensation related to stock options totaling $5.4 million and $2.2 million, respectively, during the three months ended March 31, 2024 and 2023.

During the three months ended March 31, 2024 and 2023, options to purchase 664,432 shares and 547,957 shares, respectively, of the Company’s common stock were exercised, with proceeds of $1.5 million and $1.3 million respectively, to the Company.

As of March 31, 2024, there was approximately $36.4 million of unrecognized compensation expense related to non-vested stock option awards granted under the 2014 and 2018 Stock Incentive Plans. The cost is expected to be recognized over a weighted average period of approximately 3.1 years.

Restricted Stock Units

The Company granted 35,693 restricted stock units and no restricted stock units during the three months ended March 31, 2024 and 2023, respectively. During the three months ended March 31, 2024 and 2023, the Company recorded non-cash stock-based compensation expense related to restricted stock units totaling $2.9 million and $0.7 million, respectively.

As of March 31, 2024, there was approximately $7.8 million of unrecognized compensation expense related to non-vested restricted stock units granted under the 2018 Stock Incentive Plan. The cost is expected to be recognized over a weighted average period of approximately 3.1 years.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Introduction

Management’s Discussion and Analysis of Financial Condition and Results of Operations (MD&A) is intended to provide an understanding of our financial condition, changes in financial condition and results of operations. The discussion and analysis is organized as follows:

• Overview. This section provides a general description of our business and information about our business that we believe is important in understanding our financial condition and results of operations.

• Basis of Presentation. This section provides information about key accounting estimates and policies that we followed in preparing our consolidated financial statements for the first quarter of fiscal 2024.

• Critical Accounting Policies and Estimates. This section discusses those accounting policies that are both considered important to our financial condition and results of operations and require significant judgment and estimates on the part of management in their application. All of our significant accounting policies, including the critical accounting policies, are also summarized in the notes to our interim consolidated financial statements that are included in this report.

• Results of Operations. This section provides an analysis of our results of operations for the three months ended March 31, 2024 as compared to the three months ended March 31, 2023.

• Liquidity and Capital Resources. This section provides an analysis of our cash flows, capital resources, off-balance sheet arrangements and our outstanding commitments, if any.

• Caution Concerning Forward-Looking Statements. This section discusses how certain forward-looking statements made throughout this MD&A and in other sections of this report are based on management’s present expectations about future events and are inherently susceptible to uncertainty and changes in circumstance.

Overview

We are a commercial-stage, patient-centric biopharmaceutical company focused on in-licensing, developing, and commercializing novel high-quality medicines for patients living with rare and difficult to treat diseases. We currently market three drug products, FIRDAPSE^® (amifampridine), FYCOMPA^® (perampanel), and AGAMREE^® (vamorolone). We are also currently seeking to further expand our product portfolio, with a focus on acquiring the rights to late-stage products to treat rare (orphan) central nervous system and adjacent rare (orphan) diseases. With an unwavering patient focus embedded in everything we do, we are committed to providing innovative, best-in-class medications with the hope of making a meaningful impact on those affected by these conditions.

Our flagship U.S. commercial product is FIRDAPSE^® (amifampridine) Tablets 10 mg approved for the treatment of Lambert-Eaton myasthenic syndrome, or LEMS, for adults and for children ages six and up. Further, on January 24, 2023, we closed our acquisition of the U.S. rights to FYCOMPA^® from Eisai Co., Ltd. (Eisai) and are now also marketing that product in the United States (U.S.). FYCOMPA^® (perampanel) CIII is a prescription medication used alone or with other medicines to treat focal onset seizures with or without secondarily generalized seizures in people with epilepsy aged four and older and with other medicines to treat primary generalized tonic-clonic seizures in people with epilepsy aged 12 and older. Finally, on July 18, 2023, we closed our acquisition from Santhera Pharmaceuticals Holding, Inc. (Santhera) of an exclusive license for North America for vamorolone, a novel corticosteroid treatment for patients suffering from Duchenne muscular dystrophy (DMD). On October 26, 2023, the FDA approved AGAMREE^® (vamorolone) oral suspension 40 mg/ml for the treatment of DMD in patients aged two years and older, and on March 13, 2024, we announced the U.S. commercial launch of AGAMREE^®.

FIRDAPSE^®

On November 28, 2018, we received approval from the FDA for our new drug application, or NDA, for FIRDAPSE^® Tablets 10 mg for the treatment of adult patients (ages 17 and above) with LEMS, and in January 2019, we launched FIRDAPSE^® in the U.S. Further, on September 29, 2022, the FDA approved our supplemental NDA (sNDA) to expand the indicated age range for FIRDAPSE^® Tablets 10 mg to include pediatric patients, six years of age and older for the treatment of LEMS.

We sell FIRDAPSE^® through a field force experienced in neurologic, central nervous system or rare disease products consisting at this time of approximately 34 field personnel, including sales (Regional Account Managers), thought leader liaisons and patient assistance and insurance navigation support (Patient Access Liaisons). We also have a field-based force of 11 medical science liaisons who are helping educate the medical community about scientific literature concerning LEMS and FIRDAPSE^®.

Additionally, we use non-personal promotion to reach the 20,000 neurologists who are potential LEMS treaters and the 16,000 oncologists who might be treating a LEMS patient who also has small cell lung cancer. Further, we continue to make available at no-cost a LEMS voltage gated calcium channel antibody diagnostic testing program for use by physicians who suspect that one of their patients may have LEMS and wish to reach a definitive diagnosis.

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Finally, we are continuing to expand our digital and social media activities to introduce our products and services to potential patients and their healthcare providers. We also work with several rare disease advocacy organizations (including the Myasthenia Gravis Foundation of America and the National Organization for Rare Disorders) to help increase awareness and level of support for patients living with LEMS and to provide education for the physicians who treat these rare diseases and the patients they treat.

We are supporting the distribution of FIRDAPSE^® through Catalyst Pathways^®, our personalized treatment support program for patients who enroll in it. Catalyst Pathways^® is a single source for personalized treatment support, education and guidance through the challenging dosing and titration regimen required to reach an effective therapeutic dose. It also includes distributing the drug through a very small group of exclusive specialty pharmacies (primarily AnovoRx), which is consistent with the way that most drug products for ultra-orphan diseases are distributed and dispensed to patients. We believe that by using specialty pharmacies in this way, the difficult task of navigating the health care system is far better for the patient needing treatment for their rare disease and the health care community in general.

In order to help patients with LEMS afford their medication, we, like other pharmaceutical companies which are marketing drugs for ultra-orphan conditions, have developed an array of financial assistance programs to reduce out of pocket costs that makes FIRDAPSE^® accessible and affordable. A co-pay assistance program has been designed to reduce commercial patients’ out of pocket costs to $0 whenever possible. Our FIRDAPSE^® co-pay assistance program is not available to patients enrolled in state or federal healthcare programs, including Medicare, Medicaid, VA, DoD, or TRICARE. However, we are donating, and committing to continue to donate, money to qualified, independent charitable foundations dedicated to providing assistance to any U.S. LEMS patients in financial need, who meet those independent organizations guidelines. In addition, Catalyst has a safety net program in place for patients who are uninsured and underinsured. Subject to compliance with regulatory requirements, our goal is that no LEMS patient is ever denied access to their medication for financial reasons.

On August 4, 2023, we submitted an sNDA seeking to increase the indicated maximum daily dosage of FIRDAPSE^® tablets for the treatment of LEMS from 80 mg to 100 mg. On October 13, 2023, we announced that the FDA had accepted for review our sNDA and assigned a Prescription Drug User Fee Act (PDUFA) action date of June 4, 2024. There can be no assurance that the FDA will approve our sNDA.

We are advised by our sub-licensee for FIRDAPSE^® in Japan, DyDo Pharma, Inc. (DyDo), that on December 18, 2023, based on a preliminary favorable interim data analysis after six months into the safety phase of its registration study to evaluate the efficacy and safety of FIRDAPSE^® for the treatment of LEMS, they filed a Japan NDA with the Pharmaceuticals and Medical Devices Agency (PMDA) in Japan seeking approval to commercialize the product in Japan. The review period is expected to be approximately nine months from the submission date, and there can be no assurance that the NDA filing made by DyDo will be approved.

Further, upon acceptance of the Japan NDA by the PMDA, which occurred on December 18, 2023, our license for FIRDAPSE^® automatically expanded to include other key markets in Asia and Latin America, and we are currently initiating plans to seek opportunities to expand FIRDAPSE^®’s global footprint through strategic partnerships (with the current focus on the Asia Pacific and Latin American regions). However, no such arrangements have been entered into to date.

In January 2023, we received Paragraph IV Certification Notice Letters from three generic drug manufacturers advising that they had each submitted an Abbreviated New Drug Application (ANDA) to the FDA seeking authorization from the FDA to manufacture, use or sell a generic version of FIRDAPSE^® in the U.S. The notice letters each alleged that the six patents listed in the FDA Approved Drug Products with Therapeutic Equivalence Evaluations (Orange Book) in connection with FIRDAPSE^® are not valid, not enforceable, and/or will not be infringed by the commercial manufacture, use or sale of the proposed product described in these ANDA submissions. Under the Federal Food, Drug and Cosmetic Act (FDCA), as amended by the Drug Price Competition and Patent Term Restoration Act of 1984, as amended, we had 45 days from receipt of the notice letters to determine if there were grounds to bring a lawsuit and, if so, to commence patent infringement lawsuits against these generic drug manufacturers in a federal district court, which would trigger a statutory stay precluding the FDA from final approval of the subject ANDA until May 2026 or entry of judgment holding the patents invalid, unenforceable, or not infringed, whichever occurs first. In that regard, after conducting the necessary due diligence, we filed lawsuits on March 1, 2023 in the U.S. District Court for the District of New Jersey against each of the three generic drug manufacturers who notified us of their ANDA submissions, thus triggering the stay. Further, in October 2023, we received a Paragraph IV Certification Notice Letter from a fourth generic drug manufacturer, and we filed a similar lawsuit against this manufacturer in November 2023 in the U.S. District Court for the District of New Jersey. All of these lawsuits are progressing.

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We intend to vigorously protect and defend our intellectual property for FIRDAPSE^® and, although there can be no assurance, we believe that our patent estate will protect FIRDAPSE^® from generic competition.

FYCOMPA^®

On December 17, 2022, we entered into an agreement with Eisai for the acquisition of the U.S. rights to FYCOMPA^® (perampanel) CIII. FYCOMPA^® is a selective non-competitive antagonist of AMPA receptors, the major subtype of ionotropic glutamate receptors. It was the first, and still the only, drug of its class to be approved for epilepsy. Studies suggest that AMPA receptor antagonism can lead to reduced overstimulation and anticonvulsant effects, as well as inhibiting seizure generation and spread. FYCOMPA^® is a controlled substance and is approved with a box warning label.

FYCOMPA^® is used to treat certain types of focal onset seizures (seizures that involve only one part of the brain) in adults and children four years of age and older. It is also used in combination with other medications to treat certain types of primary generalized tonic-clonic seizures (also known as a “grand mal” seizure, a seizure that involves the entire body) in adults and children 12 years of age or older. Perampanel is in a class of medications called anticonvulsants. It works by decreasing abnormal electrical activity in the brain.

On January 24, 2023, we closed our acquisition of the U.S. rights to FYCOMPA^®. In connection with the acquisition, we purchased Eisai’s regulatory approvals and documentation, product records, intellectual property, inventory, and other matters relating to the U.S. rights for FYCOMPA^®, in exchange for an upfront payment of $160 million in cash. We also agreed to pay Eisai an additional cash payment of $25 million if a requested patent extension for FYCOMPA^® until June 8, 2026 was approved by the U.S. Patent and Trademark Office (USPTO), which did not occur. Finally, we agreed to pay Eisai royalty payments after patent protection for FYCOMPA^® expires, which royalty payments will be reduced upon generic equivalents to FYCOMPA^® entering the market.

In conjunction with the closing of the asset purchase, we entered into two additional agreements with Eisai; a Transition Services Agreement (TSA) and a Supply Agreement. Under the TSA, a U.S. subsidiary of Eisai provided us with certain transitional services, and under the Supply Agreement, Eisai agreed to manufacture FYCOMPA^® for us for at least seven years at prices listed in the Supply Agreement (to be updated on a yearly basis). The transition services provided under the TSA ended on December 31, 2023.

We sell FYCOMPA^® through a field force experienced in epilepsy products consisting at this time of approximately 31 field personnel, including sales (Regional Account Managers) and payor reimbursement (National Account Managers). We also have a field-based force of seven medical science liaisons who are helping educate the medical community who treat epilepsy about scientific literature regarding epilepsy and FYCOMPA^®. Effective January 1, 2024, FYCOMPA^® is being sold and distributed through a 3PL organization.

We are supporting patients using FYCOMPA^® through an Instant Savings Card Program. Through the program, eligible commercially insured patients could pay as little as $10 for their FYCOMPA^® co-pay (with a maximum savings of $1,300 per year). The FYCOMPA^® Instant Savings Card Program is not available to patients enrolled in state or federal healthcare programs, including Medicare, Medicaid, Department of Veterans Affairs (VA), Department of Defense (DoD), or TRICARE.

Patent protection for FYCOMPA^® is primarily from two patents listed in the Orange Book. The first, U.S. patent no. 6,949,571 (the ‘571 patent) will expire May 23, 2025, including patent term extension. Although the Company had requested that the USPTO reconsider this expiration date in favor of a June 8, 2026 expiration date, the request for reconsideration of the agency’s patent term extension calculation was denied and the Company has exhausted its reasonable avenues for an extension of that patent term. The Company will update the Orange Book to reflect the May 23, 2025 expiration date at the appropriate time. The second FYCOMPA^® patent in the Orange Book is U.S. Patent No. 8,772,497 (the ‘497 patent), which expires on July 1, 2026. The ‘497 patent has been the subject of previous Paragraph IV certifications from three NDA filers.

On February 20, 2023, we received a Paragraph IV Certification Notice Letter from a company that appears to have filed the first ANDA for the oral suspension formulation for FYCOMPA^®. The same company sent a similar letter to us later in February with a similar certification for the tablet formulation for FYCOMPA^®, the fourth such certification for this formulation. Both of these letters were Paragraph IV Certifications of non-infringement, non-validity, and unenforceability of the ‘497 patent for FYCOMPA^® but each application, like the previous Paragraph IV notices from ANDA filers, does not challenge the ‘571 patent. Accordingly, the FDA may not approve any ANDA prior to expiration of the ‘571 patent, including patent term extension. Similar to the actions with the FIRDAPSE^® Paragraph IV Certifications described above, after due diligence we filed lawsuits on April 5, 2023 in the U.S. District Court for the District of New Jersey against the drug manufacturer who notified us of their ANDA submissions for both FYCOMPA^® formulations, thus triggering the 30 month stay for each application.

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AGAMREE^®

On June 19, 2023, we entered into a License and Collaboration Agreement (AGAMREE^® License Agreement) and an Investment Agreement (Investment Agreement) with Santhera. Under the AGAMREE^® License Agreement, we contracted to obtain an exclusive North America license, manufacturing and supply agreement for Santhera’s investigational product candidate, AGAMREE^® (vamorolone), a novel corticosteroid for the treatment of DMD. Under the Investment Agreement, we agreed to make a strategic investment into Santhera.

Both transactions closed on July 18, 2023. Under the AGAMREE^® License Agreement, upon closing, we made a $75 million payment to Santhera in return for the exclusive North American license for AGAMREE^®. Additionally, following approval of the NDA for the drug, on October 26, 2023, we became obligated to make a milestone payment of $36 million to Santhera, $26 million of which Santhera has advised us was used to make milestone payments that they owe to third parties. The $36 million payment was made during the fourth quarter of 2023. We may also be obligated to pay future regulatory and commercial milestone payments to Santhera tied to calendar year sales of AGAMREE^®, as well as commercial royalties. In addition to the rights to commercialize the product in North America, the AGAMREE^® License Agreement provides us with the right of first negotiation for AGAMREE^® in Europe and Japan should Santhera pursue partnership opportunities in those territories. Additionally, we will hold the North American rights to any future approved indications for AGAMREE^®. Finally, under our AGAMREE^® License Agreement with Santhera, we have agreed to purchase commercial supply of AGAMREE^® from Santhera at agreed upon rates.

Concurrent with the closing of the AGAMREE^® License Agreement, we made a strategic investment into Santhera in which we acquired 1,414,688 of Santhera’s post-reverse split ordinary shares (representing approximately 11.26% of Santhera’s outstanding ordinary shares following the transaction) at an investment price of CHF 9.477 per share (corresponding to a mutually agreed volume weighted average price prior to signing), with the approximately $15.7 million USD in equity investment proceeds, inclusive of the approximately $13.5 million USD fair value of the investment in Santhera and approximately $2.2 million USD of transaction costs included in acquired in-process research and development, to be used by Santhera for Phase IV studies of AGAMREE^® in DMD and future development of additional indications for AGAMREE^®. At May 6, 2024, the closing price of Santhera’s common shares on the SIX Swiss Exchange was CHF 9.06 per share.

DMD, the most common form of muscular dystrophy, is a rare and life-threatening neuromuscular disorder characterized by progressive muscle dysfunction, ultimately leading to loss of ambulation, respiratory failure, and fatality. Current standard treatment for DMD involves corticosteroids, which often come with significant side effects. It is estimated that between 11,000 and 13,000 patients in the U.S. are affected by DMD, with approximately 70% of patients currently receiving a corticosteroid treatment. Steroids are expected to remain the backbone of therapy for DMD patients and dosed concomitantly with other therapies.

AGAMREE^®’s unique mode of action is based on differential effects on glucocorticoid and mineralocorticoid receptors and modifying further downstream activity. As such, it is considered a novel corticosteroid with dissociative properties in maintaining efficacy that we hope has the potential to demonstrate comparable efficacy to corticosteroids, with the potential for a better-tolerated side effect profile. This mechanism of action may allow vamorolone to emerge as an effective alternative to the current standard of care corticosteroids in children, adolescents, and adult patients with DMD. In the pivotal VISION-DMD study, vamorolone met the primary endpoint Time to Stand (TTSTAND) velocity versus placebo (p=0.002) at 24 weeks of treatment and showed a good safety and tolerability profile. The most commonly reported adverse events versus placebo from the VISION-DMD study were cushingoid features, vomiting, and vitamin D deficiency. Adverse events were generally of mild to moderate severity.

On October 13, 2023, Santhera announced that the European Union’s Committee for Medicinal Products for Human Use (CHMP) adopted a positive position in favor of AGAMREE^® for the treatment of DMD patients aged four and older. In its recommendation for approval, CHMP acknowledged that there was a positive benefit-risk profile of AGAMREE^® in such patient population, including certain safety benefits of AGAMREE^® compared to standard of care corticosteroids in the treatment of DMD. On October 26, 2023, the U.S. FDA approved Santhera’s NDA for AGAMREE^® for use in treating DMD in patients aged two years and older. As part of the previously described transaction, Santhera has transferred the approved New Drug Application to us. Further, on December 18, 2023, the European Commission (EC) granted to Santhera marketing authorization for AGAMREE^® for the treatment of DMD in patents ages four years and older and on January 12, 2024, Santhera announced that AGAMREE^® had received approval by the Medicines and Healthcare products Regulatory Agency (MHRA) in the United Kingdom. On January 15, 2024, Santhera announced that AGAMREE^® was commercially launched in Germany.

On March 13, 2024, we announced the U.S. commercial launch of AGAMREE^® for the treatment of DMD in patients aged two years or older. During the first quarter of 2024 in connection with our preparation for the commercial launch of AGAMREE^® we incurred substantial commercialization expenses, including sales, marketing, analytical infrastructure, patient services, patient advocacy, and other commercialization related expenses. We also anticipate minimal sales and personnel expansion to market AGAMREE^®, with approximately 10 additional commercial team members required, due to the synergy of this product with our existing neuromuscular franchise. We are further supporting the distribution of AGAMREE^® through our Catalyst Pathways^® patient services program to ensure that patients have access to a dedicated, personalized support team that assists families through the AGAMREE^® patient journey, from answering questions to coordinating financial assistance programs for eligible patients. Finally, we have established a joint steering committee with Santhera that is overseeing the lifecycle management and development of AGAMREE^® for additional indications beyond DMD.

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To support the approval of AGAMREE^®, a randomized, double-blind, placebo and prednisone-controlled multinational trial of vamorolone was carried out in 121 patients with DMD. The study included patients ages four to less than seven years of age at time of enrollment in the study who were corticosteroid naïve and ambulatory. The trial met the primary (time to stand velocity after 24 weeks for vamorolone, 6 mg/kg per day vs placebo) and several sequential secondary motor function endpoints. Study participants receiving vamorolone, 2 mg/kg per day, and vamorolone, 6 mg/kg per day, showed improvements in multiple functional endpoints over the 24-week treatment period as compared to placebo. The statistical thresholds for the primary outcome and several secondary outcomes for vamorolone treatment were met, and vamorolone demonstrated efficacy across both dose ranges. The differences in time to stand from supine velocity (TTSTAND) were clinically meaningful. The differences in 6-minute walk test (6MWT) were also clinically meaningful.

AGAMREE^® has New Chemical Entity exclusivity that expires in October 2028. AGAMREE^® also enjoys Orphan Drug Exclusivity expiring in October 2030. AGAMREE^® is further protected by six Orange Book listed patents expiring as early as May 28, 2029 and as late as July 16, 2040. The Company has also requested Patent Term Extension and will update the relevant expiration date in the Orange Book upon a final determination by the USPTO. The earliest a generic manufacturer could file an ANDA is October 26, 2027. If we were to pursue a patent infringement action if any such ANDA challenges any of AGAMREE^®’s Orange Book patents, then the automatic statutory 30-month stay would prevent FDA approval of the ANDA until April 26, 2031.

Business Development

We continue to advance our strategic initiatives and portfolio expansion efforts, focusing on broadening and diversifying our rare (orphan) Neurology product portfolio with innovative therapies that address critical unmet medical needs and expanding the geographical footprint of our existing products. In that regard, we are currently exploring clinically differentiated and adequately de-risked opportunities, with a keen focus on products to treat rare (orphan) central nervous system (CNS) and adjacent rare (orphan) diseases. These prospects include evaluating companies with existing commercial drug products or drugs in development, for potential partnerships, licensing, geographical expansion opportunities with our existing products, and/or asset acquisitions. We continue to employ a disciplined, comprehensive, and exhaustive approach to identifying and evaluating opportunities that we believe will add significant value to our company over the near, mid, and long term. However, no additional definitive agreements have been entered into to date, and there can be no assurance that these initiatives will be successful.

Capital Resources

At March 31, 2024, we had cash and cash equivalents of approximately $310.4 million. Based on our current financial condition and forecasts of available cash, we believe that we have sufficient funds to support our operations for at least the next 12 months. There can be no assurance that we will continue to be successful in commercializing FIRDAPSE^® and FYCOMPA^®, that our commercialization of AGAMREE^® will be successful, or that we will continue to be profitable and cash flow positive. Further, there can be no assurance that if we need additional funding in the future, whether such funding will be available to us on acceptable terms.

Basis of Presentation

Revenues.

During the three months ended March 31, 2024, we generated revenues from U.S. product sales of FIRDAPSE^®, FYCOMPA^®, and AGAMREE^®. We expect these revenues to fluctuate in future periods based on our sales of our products. We received approval from Health Canada on July 31, 2020, for FIRDAPSE^® for the symptomatic treatment of LEMS and as of December 31, 2020, our sub-licensee KYE Pharmaceuticals launched FIRDAPSE^® in Canada. During the three months ended March 31, 2024, revenues generated under our collaboration agreement with KYE Pharmaceuticals were immaterial. We expect our revenues from the KYE collaboration agreement to fluctuate in future periods based on our collaborator’s ability to sell FIRDAPSE^® in Canada.

For the three months ended March 31, 2024, no revenues were generated under our collaborative agreement with Endo. We do not expect to generate revenue in future periods as a result of Endo informing us in the fourth quarter of 2023 that they are discontinuing work on the collaboration for development and commercialization of vigabatrin and that they wish to terminate the arrangement.

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For the three months ended March 31, 2024, we generated no revenues from our collaborative agreement with DyDo. We expect our revenue from the DyDo license agreement to fluctuate in future periods based on DyDo’s ability to meet various regulatory milestones set forth in such agreement.

The Company uses Change Healthcare, a subsidiary of UnitedHealth Group, to submit patient claims to Medicare and all other payors for reimbursement. On February 22, 2024, UnitedHealth Group announced that on February 21, 2024, Change Healthcare’s information technology systems were impacted by a cybersecurity incident. The Change Healthcare cybersecurity incident did not impact our day-to-day operations; however, we experienced a delay in patient claims to certain non-Medicare payors in certain states.

Cost of Sales.

Cost of sales consists of third-party manufacturing costs, freight, royalties, and indirect overhead costs associated with sales of our products. Cost of sales may also include period costs related to certain inventory manufacturing services, inventory adjustments charges, unabsorbed manufacturing and overhead costs and manufacturing variances.

Research and Development Expenses.

Our research and development expenses consist of costs incurred for company-sponsored research and development activities, support for selected investigator-sponsored research, and support for our commercial activities. The major components of research and development costs include acquired IPR&D, preclinical study costs, clinical manufacturing costs, clinical study and trial expenses, insurance coverage for clinical trials, consulting, and other third-party costs, salaries and employee benefits, stock-based compensation expense, supplies and materials, and allocations of various overhead costs related to our product development efforts and support for our commercial efforts. Prior to January 2023, all of our research and development resources have been devoted to the development of FIRDAPSE^®, CPP-109 (our version of vigabatrin), and formerly CPP-115, and until we acquire or license new products, we currently expect that our future development costs will be attributable principally to the continued development of FIRDAPSE^®, FYCOMPA^® and AGAMREE^®.

Our cost accruals for clinical studies and trials are based on estimates of the services received and efforts expended pursuant to contracts with numerous clinical study and trial sites and clinical research organizations (CROs). In the normal course of our business we contract with third parties to perform various clinical study and trial activities in the on-going development of potential products. The financial terms of these agreements are subject to negotiation and vary from contract to contract and may result in uneven payment flows. Payments under the contracts depend on factors such as the achievement of certain events or milestones, the successful enrollment of patients, the allocation of responsibilities among the parties to the agreement, and the completion of portions of the clinical study or trial or similar conditions. The objective of our accrual policy is to match the recording of expenses in our consolidated financial statements to the actual services received and efforts expended. As such, expense accruals related to preclinical and clinical studies or trials are recognized based on our estimate of the degree of completion of the event or events specified in the specific study or trial contract. We monitor service provider activities to the extent possible; however, if we underestimate activity levels associated with various studies or trials at a given point in time, we could be required to record significant additional research and development expenses in future periods. Preclinical and clinical study and trial activities require significant up-front expenditures. We anticipate paying significant portions of a study or trial’s cost before they begin and incurring additional expenditures as the study or trial progresses and reaches certain milestones.

Selling, General and Administrative Expenses.

During 2019, we actively committed funds to developing our commercialization program for FIRDAPSE^® and we have continued to incur substantial commercialization expenses, including sales, marketing, patient services, patient advocacy and other commercialization related expenses as we have continued our sales program for FIRDAPSE^®. We are also now incurring substantial commercialization expenses for FYCOMPA^® and substantial commercialization expenses for AGAMREE^®.

Our general and administrative expenses consist primarily of salaries and personnel expenses for accounting, corporate, compliance, and administrative functions. Other costs include administrative facility costs, regulatory fees, insurance, and professional fees for legal including litigation cost, IT, accounting, and consulting services.

Amortization of Intangible Assets.

Amortization of intangible assets consists of the amortization of the FYCOMPA^® product rights, which are amortized using the straight-line method over its estimated useful life of 5 years, and the RUZURGI^® product rights, which are amortized using the straight-line method over its estimated useful life of 14.5 years. We also capitalized the $36 million of milestone payment paid to Santhera during the fourth quarter of 2023 which is being amortized over the product’s estimated useful life of 10.5 years.

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Stock-Based Compensation.

We recognize expense for the fair value of all stock-based awards to employees, directors, and consultants in accordance with accounting principles generally accepted in the U.S. (U.S. GAAP). For stock options, we use the Black-Scholes option valuation model in calculating the fair value of the awards.

Income Taxes.

Our effective income tax rate is the ratio of income tax expense over our income before income taxes.

Recently Issued Accounting Standards.

For discussion of recently issued accounting standards, please see Note 2, “Basis of Presentation and Significant Accounting Policies,” in the consolidated financial statements included in this report.

Critical Accounting Policies and Estimates

Our discussion and analysis of our financial condition and results of operations is based on our consolidated financial statements, which have been prepared in accordance with U.S. GAAP. The preparation of these consolidated financial statements requires us to make judgments, estimates, and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements, as well as the reported revenues and expenses during the reporting periods. For a full discussion of our accounting policies, please refer to Note 2 on the Financial Statements included in our 2023 Annual Report on Form 10-K that we filed with the SEC on February 28, 2024. Our most critical accounting policies and estimates include: accounting for revenue recognition, valuation of intangible assets, stock-based compensation and valuation allowance for deferred tax assets. We continually evaluate our judgments, estimates and assumptions. We base our estimates on the terms of underlying agreements, our expected course of development, historical experience and other factors that we believe are reasonable based on the circumstances, the results of which form our management’s basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates. There have been no material changes to our critical accounting policies and estimates from the information provided in Part II, Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations included in our 2023 Annual Report on Form 10-K.

Results of Operations

Revenues.

For the three months ended March 31, 2024, we recognized total revenues of $98.5 million which included $98.4 million in net revenue from product sales, primarily in the U.S., compared to $85.4 million in total revenues, which included $85.3 million in net revenues from product sales for the three months ended March 31, 2023. FIRDAPSE^® net sales were approximately $66.8 million and $57.5 million for the three months ended March 31, 2024 and 2023, respectively. FYCOMPA^® net sales were approximately $30.4 million for the three months ended March 31, 2024 compared to $27.8 million for the period between January 24, 2023 (date of acquisition) and March 31, 2023. AGAMREE^® net sales were approximately $1.2 million for the period between March 13, 2024 (date of commercial launch) and March 31, 2024.

Net revenues from product sales of FIRDAPSE^® increased by 16.2% from the three-month period ended March 31, 2023 compared to the three-month period ended March 31, 2024. Product revenue for FYCOMPA^® during the three months ended March 31, 2024 were affected by differences in variable consideration (gross-to-net) compared to the period between January 24, 2023 (date of acquisition) and March 31, 2023, when revenues were booked under Eisai’s cost arrangements with distributors and government authorities. Starting on January 1, 2024, all such costs are tied to arrangements between us and those distributors and government agencies, which costs are higher than Eisai’s costs, thereby increasing the gross-to-net deductions for FYCOMPA^® and correspondingly decreasing FYCOMPA^® net product revenue. As a reminder, in the first quarter of the calendar year, like many companies in our industry, we are impacted by the reset of patient insurance deductibles.

For each of the three months ended March 31, 2024 and 2023, we also recognized $0.1 million in license and other revenue.

Cost of Sales.

Cost of sales was approximately $12.5 million for the three months ended March 31, 2024, compared to $9.9 million for the three months ended March 31, 2023. Cost of sales in both periods consisted principally of royalty payments, which are based on net

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revenue as defined in the applicable license agreements. For FIRDAPSE^®, royalties are payable on the terms set forth below in Liquidity and Capital Resources—Contractual Obligations and Arrangements, and increase by 3% when net sales (as defined in the applicable license agreement) exceed $100 million in any calendar year. Cost of sales for FYCOMPA^® in both periods consisted of product costs and excludes the amortization of the FYCOMPA^® intangible assets. Cost of sales for AGAMREE^® for the three months ended March 31, 2024 consisted of royalties payable on the terms set forth below in Liquidity and Capital Resources—Contractual Obligations and Arrangements, product costs and excludes the amortization of the AGAMREE^® intangible asset. See Note 9 of the Notes to Unaudited Consolidated Financial Statements included elsewhere in this report.

Amortization of Intangible Assets.

Amortization of intangible assets was approximately $9.3 million for the three months ended March 31, 2024 compared to $6.5 million for the three months ended March 31, 2023. Amortization of intangible assets consists of the amortization of the FYCOMPA^® rights, which are amortized using the straight-line method over its estimated useful life of 5 years, and the RUZURGI^® rights, which are amortized using the straight-line method over its estimated useful life of 14.5 years. We also capitalized a $36 million milestone payment paid to Santhera during the fourth quarter of 2023 which is being amortized over the product’s estimated useful life of 10.5 years.

Research and Development Expenses.

Research and development expenses for the three months ended March 31, 2024 and 2023 were approximately $2.6 million and $3.6 million, respectively, and represented approximately 4% and 7% of total operating costs and expenses, respectively. Research and development expenses for the three months ended March 31, 2024 and 2023 were as follows (in thousands):

	Three months ended March 31,				Change
	2024		2023		$			%
Research and development expenses	$	2,072	$	3,223		(1,151	)		(35.7	)
Employee stock-based compensation		509		339		170			50.1
Total research and development expenses	$	2,581	$	3,562		(981	)		(27.5	)

Research and development expenses remained relatively consistent for the three months ended March 31, 2024, when compared to the same period in 2023. For the three months ended March 31, 2024, research and development expenses primarily consisted of costs relating to research and development activities supporting our commercial products. For the three months ended March 31, 2023, research and development expenses included costs relating to closing out sites for both our MuSK-MG clinical trial and our previously operated expanded access program, as well as costs for research and development activities supporting our commercial products.

We expect that research and development expenses will continue to be significant in 2024 and beyond as we execute on our strategic initiative and portfolio expansion efforts, with a keen focus on products to treat rare and difficult to treat diseases.

Selling, General and Administrative Expenses.

Selling, general and administrative expenses for the three months ended March 31, 2024 and 2023 were approximately $46.9 million and $29.7 million, respectively, and represented approximately 66% and 60% of total operating costs and expenses, respectively. Selling, general and administrative expenses for the three months ended March 31, 2024 and 2023 were as follows (in thousands):

	Three months ended March 31,				Change
	2024		2023		$		%
Selling	$	25,321	$	17,764		7,557		42.5
General and administrative		13,878		9,401		4,477		47.6
Employee stock-based compensation		7,739		2,553		5,186		203.1
Total selling, general and administrative expenses	$	46,938	$	29,718		17,220		57.9

For the three months ended March 31, 2024, selling, general and administrative expenses increased approximately $17.2 million, compared to the same period in 2023. This was primarily attributable to an approximately $7.7 million increase in employee compensation and stock-based compensation related to annual merit increases and an increase in headcount resulting from the acquisitions of FYCOMPA^® and AGAMREE^®, an approximately $4.4 million increase in commercialization expenses related to the launch of AGAMREE^® and to the timing of our commitments to make contributions to 501(c)(3) organizations supporting LEMS patients of approximately $0.4 million. Further, an approximately $3.9 million increase in stock-based compensation expense is related to the retirement of two former executives, which was recorded during the first quarter of 2024 upon lapse of the applicable revocation periods under the agreements with these former executives.

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We expect that selling, general and administrative expenses will continue to be substantial in future periods as we continue our efforts to increase our revenues from FIRDAPSE^®, continue our efforts to market FYCOMPA^® and AGAMREE^® in 2024, and take steps to continue to expand our business.

Stock-Based Compensation.

Total stock-based compensation for the three months ended March 31, 2024 and 2023 was $8.2 million and $2.9 million, respectively. In the first quarter of 2024 and 2023, grants were principally for stock options relating to year-end bonus awards and grants to new employees.

Other Income, Net.

We reported other income, net in all periods, primarily relating to interest on our investment of our cash and cash equivalents of $2.0 million and $1.7 million for the three months ended March 31, 2024 and 2023, respectively. The increase in other income, net for the three months ended March 31, 2024 of approximately $0.3 million when compared to the same period in 2023 is primarily due to higher invested balances offset by $0.2 million of accretion expense related to payments arising from our acquisition of RUZURGI^® and an unrealized loss recognized during the period on equity securities of $1.1 million.

Since Santhera’s shares are traded on the SIX Swiss Exchange, they have a readily determinable fair value, and as a result the investment is measured quarterly, at fair value, with changes reported in other income, net.

The components of other income, net were as follows (in thousands):

	Three months ended March 31,
	2024			2023
Interest income (expense), net	$	3,107		$	1,704
Net gains (losses) recognized during the period on equity securities		(1,144	)		—
Total other income, net	$	1,963		$	1,704

Income Taxes.

Our effective income tax rate was 20.0% and 20.8% for the three months ended March 31, 2024 and 2023, respectively. Differences in our effective tax and the statutory federal income tax rate of 21% are driven by state income taxes and anticipated annual permanent differences offset by equity compensation deductions. Our effective tax rate is affected by many factors, including the number of stock options exercised in any period, and our effective tax rate is likely to fluctuate in future periods.

We had no uncertain tax positions as of March 31, 2024 and December 31, 2023.

Net Income.

Our net income was $23.3 million for the three months ended March 31, 2024 ($0.20 per basic and $0.19 per diluted share) as compared to a net income of $29.6 million for the three months ended March 31, 2023 ($0.28 per basic and $0.26 per diluted share).

Liquidity and Capital Resources

Since our inception, we have financed our operations primarily through multiple offerings of our securities and revenues from product sales. At March 31, 2024 we had cash and cash equivalents aggregating $310.4 million and working capital of $325.0 million. At December 31, 2023, we had cash and cash equivalents aggregating $137.6 million and working capital of $143.3 million. At March 31, 2024, substantially all of our cash and cash equivalents were deposited with one financial institution, and such balances were in excess of federally insured limits. Further, as of such date, substantially all such funds were invested in money market accounts.

On September 8, 2023, we filed a shelf registration statement with the SEC to sell up to $500 million of common stock, preferred stock, warrants to purchase common stock, debt securities and units consisting of one or more of such securities (the 2023 Shelf Registration Statement). The 2023 Shelf Registration Statement (file no. 333-274427) became effective upon filing. On January 9, 2024, we completed a public offering of 10 million shares of our common stock under the 2023 Shelf Registration Statement, raising net proceeds of approximately $140.7 million.

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Based on forecasts of available cash, we believe that we have sufficient resources to support our currently anticipated operations for at least the next 12 months from the date of this report. There can be no assurance that we will remain profitable or that we will be able to obtain any additional funding that we may require in the future.

In the future, we may require additional working capital to support our operations depending on our future success with FIRDAPSE^®, FYCOMPA^® and AGAMREE^® sales, or the products we acquire and continue to develop and whether our results continue to be profitable and cash flow positive. There can be no assurance as to the amount of any such funding that will be required for these purposes or whether any such funding will be available to us if and when it is required.

In that regard, our future funding requirements will depend on many factors, including:

• the cost of diligence in seeking potential acquisitions and of the completion of such acquisitions, if any future acquisitions occur;

• future clinical trial results;

• the scope, rate of progress and cost of our clinical trials and other product development activities;

• the terms and timing of any collaborative, licensing and other arrangements that we may establish;

• the cost and timing of regulatory approvals;

• the cost and delays in product development as a result of any changes in regulatory oversight applicable to our products;

• the amount of net revenues that we report from sales of FIRDAPSE^®, FYCOMPA^® and AGAMREE^®;

• the effect of competition and market developments;

• the cost of filing and potentially prosecuting, defending and enforcing any patent claims and other intellectual property rights; and

• the extent to which we acquire or invest in other products.

We may raise additional funds through public or private equity offerings, debt financings, corporate collaborations or other means. We also may seek governmental grants for a portion of the required funding for our clinical trials and preclinical trials. We may further seek to raise capital to fund additional product development efforts or product acquisitions, even if we have sufficient funds for our planned operations. Any sale by us of additional equity or convertible debt securities could result in dilution to our stockholders. There can be no assurance that any such required additional funding will be available to us at all or available on terms acceptable to us. Further, to the extent that we raise additional funds through collaborative arrangements, it may be necessary to relinquish some rights to our technologies or grant sublicenses on terms that are not favorable to us. If we are not able to secure additional funding when needed, we may have to delay, reduce the scope of or eliminate one or more research and development programs, which could have an adverse effect on our business.

Cash Flows.

Net cash provided by operating activities was $31.9 million and $12.1 million, respectively, for the three months ended March 31, 2024 and 2023. During the three months ended March 31, 2024, net cash provided by operating activities was primarily attributable to our net income of $23.3 million, increases of $8.5 million in accrued expenses and other liabilities, $8.2 million in stock-based compensation, $9.4 million in amortization of intangible assets and depreciation and $1.4 million in non-cash expenses. This was partially offset by increases of $7.0 million in accounts receivable, net, $4.3 million in inventory and $1.2 million prepaid expenses and other current assets, decreases of $4.5 million in accounts payable and $0.1 million in operating lease liability and $1.7 million in deferred taxes. During the three months ended March 31, 2023, net cash provided by operating activities was primarily attributable to our net income of $29.6 million, a decrease of $0.6 million in inventory, $2.9 million in stock-based compensation, $6.6 million in amortization of intangible assets and depreciation and $0.2 million in non-cash expenses. This was partially offset by increases of $23.0 million in accounts receivable, net, $0.2 million in prepaid expenses and other current assets and decreases of $0.6 million in accounts payable, $2.4 million in accrued expenses and other liabilities, $0.1 million in operating lease liability and $1.5 million in deferred taxes. The increase in accounts receivable, net, primarily relates to sales of FYCOMPA^®, which has a longer cash collection cycle than FIRDAPSE^®.

Net cash used in investing activities during the three months ended March 31, 2024 was $0.2 million and consisted of purchases of property and equipment. Net cash used in investing activities was $162.4 million for the three months ended March 31, 2023, consisting primarily of payment in connection with the FYCOMPA^® asset acquisition.

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Net cash provided by financing activities during the three months ended March 31, 2024 was $141.0 million, consisting primarily of proceeds from the issuance of common stock. Net cash provided by financing activities during the three months ended March 31, 2023 was $0.1 million, consisting primarily of proceeds from the exercise of stock options, partially offset by the payment of liabilities arising from asset acquisition and payment of employee withholding tax related to stock-based compensation.

Contractual Obligations and Arrangements.

We have entered into the following contractual arrangements with respect to sales of FIRDAPSE^®:

• Payments due under our license agreement for FIRDAPSE^®. We currently pay the following royalties under our license agreement:

• Royalties to our licensor for seven years from the first commercial sale of FIRDAPSE^® equal to 7% of net sales (as defined in the FIRDAPSE^® License Agreement) in North America for any calendar year for sales up to $100 million, and 10% of net sales in North America in any calendar year in excess of $100 million; and

• Royalties to the third-party licensor of the rights sublicensed to us from the first commercial sale of FIRDAPSE^® equal to 7% of net sales (as defined in the FIRDAPSE^® License Agreement between BioMarin and the third-party licensor) in any calendar year for the duration of regulatory exclusivity within a territory and 3.5% for territories in any calendar year in territories without regulatory exclusivity.

For the three months ended March 31, 2024 and 2023, we recognized an aggregate of approximately $8.9 million and $7.6 million, respectively, of royalties payable under these license agreements, which is included in cost of sales in the accompanying consolidated statements of operations and comprehensive income.

Further, if DyDo is successful in obtaining the right to commercialize FIRDAPSE^® in Japan, we will pay royalties to our licensor on net sales in Japan equal to a similar percentage to the royalties that we are currently paying for non-U.S. sales under our original FIRDAPSE^® License Agreement for North America.

• Payments due to Jacobus. In connection with our July 2022 settlement with Jacobus, we agreed to pay the following consideration to Jacobus:

• $30 million of cash, of which $10 million was paid at the closing of the settlement on July 11, 2022, $10 million was paid on the first anniversary of closing and the remaining $10 million will be paid on the second anniversary of closing;

• An annual royalty on Catalyst’s net sales (as defined in the License and Asset Purchase Agreement between Catalyst and Jacobus) of amifampridine products in the U.S. equal to: (a) for calendar years 2022 through 2025, 1.5% (with a minimum annual royalty of $3.0 million per year), and (b) for calendar years 2026 through the expiration of the last to expire of Catalyst’s FIRDAPSE^® patents in the U.S., 2.5% (with a minimum annual royalty of $5 million per year); provided, however, that the royalty rate may be reduced and the minimum annual royalty may be eliminated under certain circumstances; and

• If Catalyst were to receive a priority review voucher for FIRDAPSE^® or RUZURGI^® in the future, 50% of the consideration paid by a third-party to acquire that voucher will be paid to Jacobus.

For the three months ended March 31, 2024 and 2023, we recognized an aggregate of approximately $0.9 million and $0.8 million, respectively, of royalties payable to Jacobus.

We have entered into the following contractual arrangements with respect to sales of FYCOMPA^®:

• Payments due under our asset purchase agreement for FYCOMPA^®. In connection with our asset purchase agreement with Eisai Co., Ltd. (Eisai):

• We paid at closing a $160 million upfront cash payment, plus $1.6 million for reimbursement of certain prepayments. Eisai was also eligible to receive a contingent payment of $25 million if a patent term extension for FYCOMPA^® was approved until June 8, 2026 by the USPTO, which request for reconsideration of the patent term extension was denied by the USPTO in June 2023;

• Royalties commencing on loss of exclusivity for each calendar year during the royalty term equal to 12% on net sales greater than $10 million and less than $100 million, 17% on net sales of greater than $100 million and less than $125 million and 22% on net sales greater than $125 million prior to the date of generic entry. Royalties equal to 6% on net sales greater than $10 million and less than $100 million, 8.5% on net sales of greater than $100 million and less than $125 million and 11% on net sales greater than $125 million after the date of generic entry.

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• Concurrently with the acquisition, the parties entered into two related agreements: (i) a short-term TSA for commercial and manufacturing services (to which transition services ended on December 31, 2023) and (ii) a long-term Supply Agreement for the manufacturing of FYCOMPA^®. Under the TSA, Eisai provided certain commercial and manufacturing services to the Company for a transition period following the closing of the acquisition. Further, under the Supply Agreement, Eisai will manufacture FYCOMPA^® for the Company for a period of seven years (or such longer period as is set forth in the Supply Agreement) following the closing of the acquisition.

We have entered into the following contractual arrangements with respect to AGAMREE^® (vamorolone):

• Payments due under our license agreement for AGAMREE^®. In connection with our recent acquisition from Santhera:

• At closing we paid a $75 million initial cash payment.

• In the fourth quarter of 2023, following regulatory approval of Santhera’s NDA by the FDA, we paid a regulatory milestone payment of $36 million. We are also obligated to pay additional regulatory milestone payments upon regulatory approval by the FDA in the U.S. of an NDA for the product for the first, second, and third additional indications in the amounts of $50 million, $45 million, and $45 million, respectively.

• Under the license agreement, we pay: (i) royalties to the licensor until the later of expiration of product exclusivity or ten years from the first commercial sale of AGAMREE^® equal to 5% of net sales (as defined in the license agreement) in North America for any calendar year for sales equal to or less than $100 million (prior to December 31, 2025 only), 7% of net sales for sales in excess of $100 million and up to $200 million, 9% of net sales for sales in excess of $200 million and up to $300 million, 11% of net sales for sales in excess of $300 million; and (ii) royalties to the third-party licensor of the rights sublicensed us until the later of expiration of product exclusivity or ten years from the first commercial sale of AGAMREE^® equal to 7% of net sales (as defined in the license agreement) in North America for any single calendar year for sales equal to or less than $250 million, 8.5% of net sales for sales in excess of $250 million and up to $500 million, 10% of net sales for sales in excess of $500 million and up to $750 million, 12% of net sales for sales in excess of $750 million and up to $1 billion, 13% of net sales for sales in excess of $1 billion and up to $2 billion and 15% of net sales for sales in excess of $2 billion. Furthermore, we may pay Santhera sales-based milestones of up to $105 million as well as up to 11% percent royalties for all additional indications and milestones of up to $50 million for the first three additional indications.

• We are obligated to pay sales-based milestone payments if the applicable amount of net sales of all products in the territory in a single calendar year reach one of more of the net sales threshold levels set forth in the AGAMREE^® License Agreement.

• Until January 1, 2026, we are obligated to purchase all of the requirements for product solely from Santhera, and Santhera is required to manufacture, supply, and sell product to us at an agreed upon supply price.

• Simultaneously, we made a strategic equity investment into Santhera by acquiring 1,414,688 of Santhera’s post reverse-split ordinary shares (representing approximately 11.26% of Santhera’s outstanding ordinary shares following the transaction) at an investment price of CHF 9.477 per share (corresponding to a mutually agreed volume-weighted average price prior to signing), with the approximately $15.7 million USD in equity investment proceeds, inclusive of the approximately $13.5 million USD fair value of the investment in Santhera and approximately $2.2 million USD of transaction costs included in acquired in-process research and development, to be used by Santhera for Phase IV studies in DMD and further development of additional indications for AGAMREE^®.

For the three months ended March 31, 2024, we recognized an aggregate of approximately $0.1 million of royalties payable under this license agreement, which is included in cost of sales in the accompanying consolidated statements of operations and comprehensive income.

We also have entered into the following contractual arrangements:

• Purchase commitment. We have entered into a purchase commitment with a contract manufacturing organization for approximately $0.5 million per year. The agreement expires in December 2024.

• Lease for office space. We operate our business in leased office space in Coral Gables, Florida. We lease approximately 10,700 square feet of office space and we pay annual rent of approximately $0.5 million.

Off-Balance Sheet Arrangements.

We do not have any off-balance sheet arrangements as such term is defined in rules promulgated by the SEC.

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Caution Concerning Forward-Looking Statements

This report contains “forward-looking statements”, as that term is defined in the Private Securities Litigation Reform Act of 1995. These include statements regarding our expectations, beliefs, plans or objectives for future operations and anticipated results of operations. For this purpose, any statements contained herein that are not statements of historical fact may be deemed to be forward-looking statements. Without limiting the foregoing, “believes”, “anticipates”, “proposes”, “plans”, “expects”, “intends”, “may”, and other similar expressions are intended to identify forward-looking statements. Such statements involve known and unknown risks, uncertainties and other factors that may cause our actual results, performance or other achievements to be materially different from any future results, performances or achievements expressed or implied by such forward-looking statements. Factors that might cause such differences include, but are not limited to, those discussed in the section entitled “Item 1A – Risk Factors.”

The continued successful commercialization of FIRDAPSE^® (amifampridine), FYCOMPA^® (perampanel) CIII, and AGAMREE^® (vamorolone) are highly uncertain. Factors that will affect our success include the uncertainty of:

• Whether we will be able to continue to successfully market and sell FIRDAPSE^®, FYCOMPA^®, and AGAMREE^® while maintaining full compliance with applicable federal and state laws, rules and regulations;

• Whether our estimates of the size of the market for FIRDAPSE^® for the treatment of Lambert-Eaton Myasthenic Syndrome (LEMS) will prove to be accurate;

• Whether our supplemental New Drug Application (sNDA) seeking to increase the maximum daily dosage of FIRDAPSE^® from 80 mg to 100 mg will be approved by the U.S. Food and Drug Administration (FDA);

• Whether the daily dose of FIRDAPSE^® taken by patients changes over time and affects our results of operations;

• Whether we will be able to locate LEMS patients who are undiagnosed or are misdiagnosed with other diseases;

• Whether patients will discontinue from the use of FIRDAPSE^® and FYCOMPA^® at rates that are higher than historically experienced or are higher than we project;

• Whether new FIRDAPSE^®, FYCOMPA^®, and AGAMREE^® patients can be successfully titrated to stable therapy;

• Whether we can continue to market FIRDAPSE^® and FYCOMPA^® on a profitable and cash flow positive basis;

• Whether AGAMREE^® will become profitable and cash flow positive now that it has been launched;

• Whether we will be able to demonstrate, to the satisfaction of the FDA and third-party payors, whether AGAMREE^® offers advantages compared to corticosteroids or competitor’s products;

• Whether the acquisition of AGAMREE^® will prove to be accretive to EBITDA and EPS in 2024 and beyond;

• Whether any revenue or earnings guidance that we provide to the public market will turn out to be accurate;

• Whether payors will provide coverage and reimburse for our products at the price that we charge for our products;

• The ability of our third-party suppliers and contract manufacturers to supply sufficient product to meet our customers’ needs in future periods;

• The ability of our third-party suppliers and contract manufacturers to maintain compliance with current Good Manufacturing Practices (cGMP);

• The ability of those third parties that distribute our products to maintain compliance with applicable law;

• Our ability to maintain compliance with applicable rules relating to our patient assistance programs for our products;

• Our ability to maintain compliance with the applicable rules that relate to our contributions to 501(c)(3) organizations that support patients in financial need;

• The scope of our intellectual property and the outcome of any challenges to our intellectual property, and, conversely, whether any third-party intellectual property presents unanticipated obstacles for FIRDAPSE^®, FYCOMPA^®, or AGAMREE^®;

• Whether there will be a post-closing review by antitrust regulators of our previous acquisition transactions, and the outcome of any such reviews if they occur;

• Whether we will be able to acquire additional drug products under development, complete development required to commercialize such products, and thereafter, if such products are approved for commercialization, successfully market such products;

43

• Whether our patents will be sufficient to prevent generic competition for FIRDAPSE^® and AGAMREE^® after our orphan drug exclusivity for each product expires;

• Whether we will be successful in our litigation to enforce our patents against the Paragraph IV challengers who have filed Abbreviated New Drug Applications (ANDAs) seeking to introduce generic versions of FIRDAPSE^® and FYCOMPA^®;

• The impact on our profits and cash flow of adverse changes in reimbursement and coverage policies or regulations from government and private payors such as Medicare, Medicaid, insurance companies, health maintenance organizations and other plan administrators, or the impact of pricing pressures enacted by industry organizations, the federal government or the government of any state, including as a result of increased scrutiny over pharmaceutical pricing or otherwise;

• Changes in the healthcare industry and the effect of political pressure from and actions by the President, Congress and/or medical professionals seeking to reduce prescription drug costs, and changes to the healthcare industry occasioned by any future changes in laws relating to the pricing of drug products, including changes made in the Inflation Reduction Act of 2022, or changes in the healthcare industry generally;

• Whether we and Santhera Pharmaceuticals can successfully develop additional indications for AGAMREE^® and obtain the ability to commercialize the product for these additional indications;

• The state of the economy generally and its impact on our business;

• The scope, rate of progress and expense of our clinical trials and studies, pre-clinical studies, proof-of-concept studies, and our other drug development activities, and whether our trials and studies will be successful;

• Our ability to complete any clinical trials and studies that we may undertake on a timely basis and within the budgets we establish for such trials and studies;

• Whether FIRDAPSE^® can be successfully commercialized in Canada on a profitable basis through KYE Pharmaceuticals, our collaboration partner in Canada;

• The impact on sales of FIRDAPSE^® in the U.S. if an amifampridine product is purchased in Canada for use in the U.S.;

• Whether DyDo will be able to obtain approval to commercialize FIRDAPSE^® in Japan; and

• Whether our plans to expand the reach of FIRDAPSE^® and AGAMREE^® into other global regions will be successful.

• System failures or security or data breaches due to cyber-attacks, or cyber intrusions, including ransomware, phishing attacks and other malicious intrusions whether it occurs directly to us or indirectly through third-parties.

Our current plans and objectives are based on assumptions relating to the continued commercialization of FIRDAPSE^®, FYCOMPA^®, and AGAMREE^® and on our plans to seek to acquire or in-license additional products. Although we believe that our assumptions are reasonable, any of our assumptions could prove inaccurate. Considering the significant uncertainties inherent in the forward-looking statements we have made herein, which reflect our views only as of the date of this report, you should not place undue reliance upon such statements. We undertake no obligation to update or revise publicly any forward-looking statements, whether as a result of new information, future events or otherwise.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK

Market risk represents the risk of changes in the value of market risk-sensitive instruments caused by fluctuations in interest rates, foreign exchange rates and commodity prices. Changes in these factors could cause fluctuations in our results of operations and cash flows.

Our exposure to interest rate risk is currently confined to our cash and cash equivalents that are from time to time invested in highly liquid money market funds and U.S. Treasuries. The primary objective of our investment activities is to preserve our capital to fund operations. We also seek to maximize income from our investments without assuming significant risk. We do not use derivative financial instruments in our investment portfolio. Our cash and investments policy emphasizes liquidity and preservation of principal over other portfolio considerations.

ITEM 4. CONTROLS AND PROCEDURES

a. We have carried out an evaluation, under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, of the effectiveness of the design and operation of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934, as amended (the Exchange Act). Based on such evaluation, our principal executive officer and principal financial officer have concluded that as of March 31, 2024, our disclosure controls and procedures were effective to ensure that the information required to be disclosed by

44

us in the reports filed or submitted by us under the Exchange Act, was recorded, processed, summarized or reported within the time periods specified in the rules and regulations of the SEC, and include controls and procedures designed to ensure that information required to be disclosed by us in such reports was accumulated and communicated to management, including our principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosures.

b. During the three months ended March 31, 2024, there were no changes in our internal controls or in other factors that could have a material effect, or are reasonably likely to have a material effect, on our internal control over financial reporting.

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

Paragraph IV Patent Litigation

In January 2023, we received Paragraph IV Certification Notice Letters from three generic drug manufacturers advising that they had each submitted an Abbreviated New Drug Application (ANDA) to the FDA seeking authorization from the FDA to manufacture, use or sell a generic version of FIRDAPSE^® in the U.S. The notice letters each alleged that the six patents listed in the FDA Orange Book in connection with FIRDAPSE^® are not valid, not enforceable, and/or will not be infringed by the commercial manufacture, use or sale of the proposed product described in these ANDA submissions. Under the FDCA, as amended by the Drug Price Competition and Patent Term Restoration Act of 1984, as amended, we had 45 days from receipt of the notice letters to determine if there were grounds to bring a lawsuit and, if so, to commence patent infringement lawsuits against these generic drug manufacturers in a federal district court, which would trigger a statutory stay precluding the FDA from final approval of the subject ANDAs until May 2026 or entry of judgment holding the patents invalid, unenforceable, or not infringed, whichever occurs first. In that regard, after conducting the necessary due diligence, we filed lawsuits on March 1, 2023 in the U.S. District Court for the District of New Jersey against each of the three generic drug manufacturers who notified us of their ANDA submissions, thus triggering the stay. Further, in October 2023, we received a Paragraph IV Certification Notice Letter from a fourth generic drug manufacturer, and we filed a similar lawsuit against the manufacturer in November 2023. All of these lawsuits are progressing.

We intend to vigorously protect and defend our intellectual property for FIRDAPSE^® and, although there can be no assurance, we believe that our patent estate will protect FIRDAPSE^® from generic competition.

On February 20, 2023, we received a Paragraph IV Certification Notice Letter from a company that appears to have filed the first ANDA for the oral suspension formulation for FYCOMPA^®. The same company sent a similar letter to us later in February with a similar certification for the tablet formulation for FYCOMPA^®, the fourth such certification for this formulation. Both of these letters were Paragraph IV certifications of non-infringement, non-validity, and unenforceability to the ‘497 patent for FYCOMPA^® but each application, like the previous Paragraph IV notices from ANDA filers, for FYCOMPA^® tablets does not challenge the ‘571 patent. Accordingly, the FDA may not approved any ANDA prior to expiration of the ‘571 patent, including patent term extension. Similar to the actions with the FIRDAPSE^® Paragraph IV Certifications described above, after due diligence we filed lawsuits on April 5, 2023 in the U.S. District Court for the District of New Jersey against the drug manufacturer who notified us of their ANDA submissions for both FYCOMPA^® formulations, thus triggering the 30 month stay for each application.

Other Litigation

From time to time we may become involved in legal proceedings arising in the ordinary course of business. Other than as set forth above, we believe that there is no litigation pending at this time that could have, individually or in the aggregate, a material adverse effect on our results of operations, financial condition or cash flows.

ITEM 1A. RISK FACTORS

There are many factors that affect our business, our financial condition, and the results of our operations. In addition to the information set forth in this quarterly report, you should carefully read and consider “Item 1A. Risk Factors” in Part I, and “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Part II, of our 2023 Annual Report on Form 10-K filed with the SEC, which contain a description of significant factors that might cause our actual results of operations in future periods to differ materially from those currently expected or desired.

45

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

Issuer Purchases of Equity Securities

In March 2021, our Board of Directors approved a share repurchase program that authorizes the repurchase of up to $40 million of our common stock, pursuant to a repurchase program under Rule 10b-18 of the Securities Act (the “Share Repurchase Program”). The Share Repurchase Program commenced on March 22, 2021.

At present, we are not purchasing shares under our share repurchase program, but rather we are retaining cash for use in our business development activities.

During the three months ended March 31, 2024, we did not repurchase any of our common stock. Approximately $21 million remains available under the Share Repurchase Program as of March 31, 2024.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 4. MINE SAFETY DISCLOSURE

Not applicable.

ITEM 5. OTHER INFORMATION

None.

46

ITEM 6. EXHIBITS

31.1	Certification of Principal Executive Officer under Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of Principal Financial Officer under Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certification of Principal Executive Officer under Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Certification of Principal Financial Officer under Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema
101.CAL	XBRL Taxonomy Extension Calculation Linkbase
101.DEF	XBRL Taxonomy Extension Definition Linkbase
101.LAB	XBRL Taxonomy Extension Label Linkbase
101.PRE	XBRL Taxonomy Extension Presentation Linkbase
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

47

SIGNATURES

Pursuant to the Securities Exchange Act of 1934, the Registrant has caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Catalyst Pharmaceuticals, Inc.
By:	/s/ Michael W. Kalb
	Michael W. Kalb
	Executive Vice President and Chief Financial Officer

Date: May 8, 2024

48

EX-31.1

Exhibit 31.1

Certification of Principal Executive Officer

I, Richard J. Daly, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Catalyst Pharmaceuticals, Inc.;

2. Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15(d)-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiary, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent functions):

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 8, 2024

/s/ Richard J. Daly

Richard J. Daly

President and Chief Executive Officer

(Principal Executive Officer)

EX-31.2

Exhibit 31.2

Certification of Principal Financial Officer

I, Michael W. Kalb, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Catalyst Pharmaceuticals, Inc.;

2. Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15(d)-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiary, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent functions):

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 8, 2024

/s/ Michael W. Kalb

Michael W. Kalb

Executive Vice President and Chief Financial Officer

(Principal Financial Officer)

EX-32.1

Exhibit 32.1

Certification Required by 18 U.S.C. Section 1350

(as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002)

I, Richard J. Daly as Principal Executive Officer of Catalyst Pharmaceuticals, Inc. (the Company), certify, pursuant to 18 U.S.C. Section 1350 (as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002), that to my knowledge:

1. the accompanying Quarterly Report on Form 10-Q of the Company for the quarterly period ended March 31, 2024 (the Report), filed with the U.S. Securities and Exchange Commission, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: May 8, 2024	/s/ Richard J. Daly
	Richard J. Daly
	President and Chief Executive Officer
	(Principal Executive Officer)

EX-32.2

Exhibit 32.2

Certification Required by 18 U.S.C. Section 1350

(as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002)

I, Michael W. Kalb as Principal Financial Officer of Catalyst Pharmaceuticals, Inc. (the Company), certify, pursuant to 18 U.S.C. Section 1350 (as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002), that to my knowledge:

1. the accompanying Quarterly Report on Form 10-Q of the Company for the quarterly period ended March 31, 2024 (the Report), filed with the U.S. Securities and Exchange Commission, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: May 8, 2024	/s/ Michael W. Kalb
	Michael W. Kalb
	Executive Vice President and Chief Financial Officer
	(Principal Financial Officer)

XML

Cover Page - shares	3 Months Ended
	Mar. 31, 2024	May 06, 2024
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Entity Registrant Name	CATALYST PHARMACEUTICALS, INC.
Entity Central Index Key	0001369568
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Filer Category	Large Accelerated Filer
Trading Symbol	CPRX
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Address, State or Province	FL
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Stock, par value $0.001 per share
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		118,115,079
Entity Tax Identification Number	76-0837053
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	355 Alhambra Circle
Entity Address, Address Line Two	Suite 801
Entity Address, City or Town	Coral Gables
Entity Address, Postal Zip Code	33134
City Area Code	305
Local Phone Number	420-3200
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-33057

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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current Assets:
Cash and cash equivalents	$ 310,411	$ 137,636
Accounts receivable, net	60,493	53,514
Inventory	19,953	15,644
Prepaid expenses and other current assets	13,745	12,535
Total current assets	404,602	219,329
Operating lease right-of-use asset	2,440	2,508
Property and equipment, net	1,308	1,195
License and acquired intangibles, net	184,705	194,049
Deferred tax assets, net	38,276	36,544
Investment in equity securities	15,345	16,489
Total assets	646,676	470,114
Current Liabilities:
Accounts payable	10,261	14,795
Accrued expenses and other liabilities	69,305	61,268
Total current liabilities	79,566	76,063
Operating lease liability, net of current portion	3,091	3,188
Other non-current liabilities	2,607	2,982
Total liabilities	85,264	82,233
Commitments and contingencies (Note 12)
Stockholders' equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized: none issued and outstanding at March 31, 2024 and December 31, 2023	0	0
Common stock, $0.001 par value, 200,000,000 shares authorized; 118,029,526 shares and 107,121,549 shares issued and outstanding at March 31, 2024 and December 31, 2023, respectively	118	107
Additional paid-in capital	416,747	266,488
Retained earnings	144,547	121,272
Accumulated other comprehensive income (Note 4)	0	14
Total stockholders' equity	561,412	387,881
Total liabilities and stockholders' equity	$ 646,676	$ 470,114

XML

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	118,029,526	107,121,549
Common stock, shares outstanding	118,029,526	107,121,549

XML

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Revenues:
Total revenues		$ 98,509	$ 85,366
Operating costs and expenses:
Cost of sales	[1]	12,520	9,946
Research and development		2,581	3,562
Selling, general and administrative	[1]	46,938	29,718
Amortization of intangible assets		9,344	6,531
Total operating costs and expenses		71,383	49,757
Operating income		27,126	35,609
Other income, net		1,963	1,704
Net income before income taxes		29,089	37,313
Income tax provision		5,814	7,745
Net income		$ 23,275	$ 29,568
Net income per share:
Basic		$ 0.2	$ 0.28
Diluted		$ 0.19	$ 0.26
Weighted average shares outstanding:
Basic		116,806,117	105,561,229
Diluted		123,403,626	113,986,129
Net income		$ 23,275	$ 29,568
Other comprehensive income (Note 4):
Unrealized gain (loss) on available-for-sale securities, net of tax of $4 and $5, respectively		(14)	(13)
Comprehensive income		23,261	29,555
Product revenue, net [Member]
Revenues:
Total revenues		98,441	85,304
License and other revenue [Member]
Revenues:
Total revenues		$ 68	$ 62

[1] exclusive of amortization of intangible assets

XML

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net of tax impact	$ 4	$ 5

XML

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Beginning Balance at Dec. 31, 2022	$ 300,421	$ 105	$ 250,430	$ 49,862	$ 24
Beginning Balance (shares) at Dec. 31, 2022		105,263,000
Stock-based compensation	2,892		2,892
Exercise of stock options for common stock	1,270	$ 1	1,269
Exercise of stock options for common stock (shares)		548,000
Issuance of common stock upon vesting of restricted stock units, net	(477)		(477)
Issuance of common stock upon vesting of restricted stock units, net (Share)		127,000
Other comprehensive gain (loss)	(13)				(13)
Net income	29,568			29,568
Ending Balance at Mar. 31, 2023	333,661	$ 106	254,114	79,430	11
Ending Balance (shares) at Mar. 31, 2023		105,938,000
Beginning Balance at Dec. 31, 2023	387,881	$ 107	266,488	121,272	14
Beginning Balance (shares) at Dec. 31, 2023		107,122,000
Issuance of common stock, net	140,704	$ 10	140,694
Issuance of common stock, net (shares)		10,000,000
Stock-based compensation	8,248		8,248
Exercise of stock options for common stock	1,522	$ 1	1,521
Exercise of stock options for common stock (shares)		664,000
Issuance of common stock upon vesting of restricted stock units, net	(204)		(204)
Issuance of common stock upon vesting of restricted stock units, net (Share)		244,000
Other comprehensive gain (loss)	(14)				(14)
Net income	23,275			23,275
Ending Balance at Mar. 31, 2024	$ 561,412	$ 118	$ 416,747	$ 144,547	$ 0
Ending Balance (shares) at Mar. 31, 2024		118,030,000

XML

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating Activities:
Net income	$ 23,275	$ 29,568
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation	86	69
Stock-based compensation	8,248	2,892
Amortization of intangible assets	9,344	6,531
Deferred taxes	(1,746)	(1,519)
Accretion of discount	153	0
Reduction in the carrying amount of right-of-use asset	68	64
Acquired inventory samples expensed from asset acquisition	0	130
Change in fair value of equity securities	1,144	0
(Increase) decrease in:
Accounts receivable, net	(6,979)	(22,963)
Inventory	(4,309)	577
Prepaid expenses and other current assets	(1,210)	(191)
Increase (decrease) in:
Accounts payable	(4,534)	(584)
Accrued expenses and other liabilities	8,474	(2,422)
Operating lease liability	(89)	(82)
Net cash provided by (used in) operating activities	31,925	12,070
Investing Activities:
Purchases of property and equipment	(199)	(74)
Payment in connection with asset acquisitions	0	(162,293)
Net cash provided by (used in) investing activities	(199)	(162,367)
Financing Activities:
Payment of employee withholding tax related to stock-based compensation	(204)	(477)
Proceeds from exercise of stock options	1,522	1,270
Payment of liabilities arising from asset acquisition	(973)	(644)
Proceeds from issuance of common stock	141,000	0
Payment of fees in connection with issuance of common stock	(296)	0
Net cash provided by (used in) financing activities	141,049	149
Net increase (decrease) in cash and cash equivalents	172,775	(150,148)
Cash and cash equivalents – beginning of period	137,636	298,395
Cash and cash equivalents – end of period	310,411	148,247
Supplemental disclosures of cash flow information:
Cash paid for interest	65
Non-cash investing and financing activities:
Liabilities arising from asset acquisition	$ 0	$ 1,915

XML

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 23,275	$ 29,568

XML

Insider Trading Arrangements	3 Months Ended
	Mar. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

XML

Organization and Description of Business

3 Months Ended

Mar. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Description of Business

1. Organization and Description of Business.

Catalyst Pharmaceuticals, Inc. and subsidiary (collectively, the Company) is a commercial-stage, patient-centric biopharmaceutical company focused on in-licensing, developing, and commercializing novel high-quality medicines for patients living with rare and difficult to treat diseases. The Company currently markets three drug products, FIRDAPSE® (amifampridine), FYCOMPA® (perampanel), and AGAMREE® (vamorolone). The Company is also currently seeking to further expand its product portfolio, with a focus on acquiring the rights to late-stage products to treat rare (orphan) central nervous system and adjacent rare (orphan) diseases. With an unwavering patient focus embedded in everything the Company does, it is committed to providing innovative, best-in-class medications with the hope of making a meaningful impact on those affected by these conditions.

The Company’s New Drug Application (NDA) for FIRDAPSE® (amifampridine) Tablets 10 mg for the treatment of adults with Lambert-Eaton myasthenic syndrome (LEMS) was approved in 2018 by the U.S. Food & Drug Administration (FDA), and FIRDAPSE® is commercially available in the United States (U.S.) as a treatment for adults with LEMS. Further, Canada’s national healthcare regulatory agency, Health Canada, approved the use of FIRDAPSE® for the treatment of adult patients in Canada with LEMS in 2020 and FIRDAPSE® is commercially available in Canada for the treatment of patients with LEMS through a license and supply agreement with KYE Pharmaceuticals. In the third quarter of 2022, the FDA approved the Company’s supplemental New Drug Application approving an expansion of the FIRDAPSE® label to include pediatric patients (ages six and older).

On December 17, 2022, the Company entered into an asset purchase agreement with Eisai Co., Ltd. (Eisai) for the acquisition of the U.S. rights to FYCOMPA® (perampanel) CIII, a prescription medication used alone or in combination with other medicines to treat focal onset seizures with or without secondarily generalized seizures in people with epilepsy aged four and older and with other medicines to treat primary generalized tonic-clonic seizures in people with epilepsy aged 12 and older. The Company closed the acquisition of FYCOMPA® on January 24, 2023 and the Company began marketing FYCOMPA® in the U.S.

In July 2023, the Company completed its acquisition from Santhera Pharmaceuticals Holdings (Santhera) of an exclusive license for North America for AGAMREE® (vamorolone), a treatment for patients suffering with Duchenne muscular dystrophy (DMD). The license is for exclusive commercial rights in the U.S., Canada, and Mexico, as well as the right of first negotiation in Europe and Japan should Santhera pursue partnership opportunities in those jurisdictions. Additionally, the Company will hold North American rights for any future approved indications of AGAMREE®. AGAMREE® has previously received FDA Orphan Drug and Fast Track designations. On October 26, 2023, the FDA approved AGAMREE® oral suspension 40 mg/ml for the treatment of DMD in patients aged two years and older, and on March 13, 2024, the Company announced the U.S. commercial launch of AGAMREE®.

Since inception, the Company has devoted substantially all its efforts to business planning, research and development, recruiting management and technical staff, acquiring operating assets, raising capital, and selling its products. The Company has been able to fund its cash needs to date through offerings of its securities and from revenues from sales of its products. See Note 15 (Stockholders’ Equity).

Capital Resources

Based on forecasts of available cash, the Company believes that it has sufficient resources to support the currently anticipated operations for at least the next 12 months from the date of this report.

The Company may raise funds in the future through public or private equity offerings, debt financings, corporate collaborations, governmental research grants or other means. The Company may also seek to raise new capital to fund additional business development activities, even if it has sufficient funds for its planned operations. Any sale by the Company of additional equity or convertible debt securities could result in dilution to the Company’s current stockholders. There can be no assurance that any required additional funding will be available to the Company at all or available on terms acceptable to the Company. Further, to the extent that the Company raises additional funds through collaborative arrangements, it may be necessary to relinquish some rights to the Company’s drug candidates or grant sublicenses on terms that are not favorable to the Company. If the Company is not able to secure additional funding when needed, the Company may have to delay, reduce the scope of, or eliminate one or more research and development programs, which could have an adverse effect on the Company’s business.

On January 9, 2024, the Company completed a public offering of 10 million shares of its common stock, raising net proceeds of approximately $140.7 million. The proceeds of the offering will be used to potentially acquire new products and for general corporate purposes.

Risks and Uncertainties

The Company is subject to risks and uncertainties that could affect its business in unforeseen ways.

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Basis of Presentation and Significant Accounting Policies

3 Months Ended

Mar. 31, 2024

Accounting Policies [Abstract]

Basis of Presentation and Significant Accounting Policies

2. Basis of Presentation and Significant Accounting Policies.

a. INTERIM FINANCIAL STATEMENTS. The accompanying unaudited interim consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP), and pursuant to the rules and regulations of the Securities and Exchange Commission (SEC) for reporting of interim financial information. Pursuant to such rules and regulations, certain information and note disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been omitted. The consolidated balance sheet as of December 31, 2023 included in this Form 10-Q was derived from the audited financial statements and does not include all disclosures required by U.S. GAAP.

In the opinion of management, the accompanying unaudited interim consolidated financial statements of the Company contain all adjustments (consisting of only normal recurring adjustments) necessary to present fairly the financial position of the Company as of the dates and for the periods presented. Accordingly, these consolidated statements should be read in conjunction with the financial statements and notes thereto for the year ended December 31, 2023 included in the 2023 Annual Report on Form 10-K filed by the Company with the SEC. The results of operations for the three months ended March 31, 2024 are not necessarily indicative of the results to be expected for any future period or for the full 2024 fiscal year.

b. PRINCIPLES OF CONSOLIDATION. The consolidated financial statements include the Company’s accounts and those of its wholly-owned subsidiary, Catalyst Pharmaceuticals Ireland, Ltd. (Catalyst Ireland). All intercompany accounts and transactions have been eliminated in consolidation. Catalyst Ireland was organized in 2017.

c. USE OF ESTIMATES. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.

d. CASH AND CASH EQUIVALENTS. The Company primarily invests in high credit-quality instruments in order to obtain higher yields on its cash equivalents. The Company considers all highly liquid instruments, purchased with an original maturity of three months or less, to be cash equivalents. Cash equivalents consist mainly of money market funds and U.S. Treasuries. The Company has substantially all its cash and cash equivalents deposited in money market accounts with one financial institution. These amounts exceed federally insured limits. 

e. INVESTMENTS. At March 31, 2024 investments consisted of an investment in equity securities. At December 31, 2023, investments consisted of U.S. Treasuries and an investment in equity securities. Such investments are not insured by the Federal Deposit Insurance Corporation.

There were no U.S. Treasuries held at March 31, 2024 and U.S. Treasuries held at December 31, 2023 were classified as available-for-sale securities. The Company classifies U.S. Treasuries with stated maturities of greater than three months and less than one year in short-term investments. U.S. Treasuries with stated maturities greater than one year are classified as non-current investments in its consolidated balance sheets.

The Company records available-for-sale securities at fair value with unrealized gains and losses reported in accumulated other comprehensive income (in stockholders’ equity). Realized gains and losses are included in other income, net in the consolidated statements of operations and comprehensive income and are derived using the specific identification method for determining the cost of securities sold. Interest income is recognized when earned and is included in other income, net in the consolidated statements of operations and comprehensive income. The Company recognizes a charge when the declines in the fair value below the amortized cost basis of its available-for-sale securities are judged to be as a result of a credit loss. The Company considers various factors in determining whether to recognize an allowance for credit losses including whether the Company intends to sell the security or whether it is more likely than not that the Company would be required to sell the security before recovery of the amortized cost basis. If the unrealized loss of an available-for-sale debt security is determined to be a result of a credit loss the Company would recognize an allowance and the corresponding credit loss would be included in the consolidated statements of operations and comprehensive income. The Company has not recorded an allowance for credit loss on its available-for-sale securities. See Note 3 (Investments).

In July 2023, the Company made a strategic equity investment into Santhera by acquiring 1,414,688 of Santhera’s post reverse-split ordinary shares (representing approximately 11.26% of Santhera’s outstanding ordinary shares following the transaction). The investment is denominated in Swiss Francs. The Company has determined that it does not have significant influence over the operations of Santhera and accordingly the investment in Santhera’s ordinary shares is recorded under ASC 321, Equity Securities, with changes in fair value, inclusive of changes resulting from movements in foreign exchange rates, in other income, net in the consolidated statement of operations and comprehensive income.

f. ACCOUNTS RECEIVABLE, NET. Accounts receivable are recorded net of customer allowance for distribution fees, trade discounts, prompt payment discounts, chargebacks and expected credit losses. Allowances for distribution fees, trade discounts, prompt payment discounts and chargebacks are based on contractual terms. The Company estimates the allowance for expected credit losses based on existing contractual payment terms, actual payment patterns of its customers, current and future economic and market conditions and individual customer circumstances. The Company has not historically experienced any significant credit losses. All customer accounts are actively managed. At March 31, 2024 and December 31, 2023, the Company determined that an allowance for expected credit losses was not required. No accounts were written off during the periods presented.

g. INVENTORY. Inventories are stated at the lower of cost or net realizable value. Inventories consist of raw materials, work-in-process and finished goods. Costs to be capitalized as inventories primarily include third-party manufacturing costs and other overhead costs. Cost is determined using a standard cost method, which approximates actual cost, and assumes a first-in, first out (FIFO) flow of goods. If information becomes available that suggests that inventories may not be realizable, the Company may be required to expense a portion or all of the previously capitalized inventories.

Products that have been approved by the FDA or other regulatory authorities, such as FIRDAPSE®, FYCOMPA® and AGAMREE® are also used in clinical programs to assess the safety and efficacy of the products for usage in treating diseases that have not been approved by the FDA or other regulatory authorities. The forms of FIRDAPSE®, FYCOMPA® and AGAMREE® utilized for both commercial and clinical programs are identical and, as a result, the inventories have an “alternative future use” as defined in authoritative guidance. Raw materials associated with clinical development programs are included in inventory and charged to research and development expense when the product enters the research and development process and no longer can be used for commercial purposes and, therefore, does not have an “alternative future use”.

The Company evaluates for potential excess inventory by analyzing current and future product demand relative to the remaining product shelf life. The Company builds demand forecasts by considering factors such as, but not limited to, overall market potential, market share, market acceptance, and patient usage.

h. PREPAID EXPENSES AND OTHER CURRENT ASSETS. Prepaid expenses and other current assets consist primarily of prepaid manufacturing, prepaid tax, prepaid insurance, prepaid subscription fees, prepaid research fees, prepaid commercialization expenses, prepaid co-pay assistance program, amounts due from collaborative and license arrangements and prepaid conference and travel expenses. Prepaid research fees consist of advances for the Company’s product development activities, including contracts for pre-clinical studies, clinical trials and studies, regulatory affairs and consulting. Prepaid manufacturing consists of advances for the Company’s drug manufacturing activities. Such advances are recorded as expense as the related goods are received or the related services are performed.

i. PROPERTY AND EQUIPMENT, NET. Property and equipment are recorded at cost less accumulated depreciation. Depreciation is calculated to amortize the depreciable assets over their useful lives using the straight-line method and commences when the asset is placed in service. Leasehold improvements are amortized on a straight-line basis over the term of the lease or the estimated life of the improvement, whichever is shorter. Useful lives generally range from three to five years for computer equipment and software, from five to seven years for furniture and equipment, and from five to ten years for leasehold improvements. Expenditures for repairs and maintenance are charged to expenses as incurred.

j. BUSINESS COMBINATIONS AND ASSET ACQUISITIONS. The Company evaluates acquisitions of assets and other similar transactions to assess whether or not the transaction should be accounted for as a business combination or asset acquisition by first applying a screen test to determine if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets. If the screen test is met, the transaction is accounted for as an asset acquisition. If the screen test is not met, further determination is required as to whether or not the Company has acquired inputs and processes that have the ability to create outputs which would meet the requirements of a business. If determined to be an asset acquisition, the Company accounts for the transaction under ASC 805-50, which requires the acquiring entity in an asset acquisition to recognize assets acquired and liabilities assumed based on the cost to the acquiring entity on a relative fair value basis, which includes transaction costs in addition to consideration given. Goodwill is not recognized in an asset acquisition and any excess consideration transferred over the fair value of the net assets acquired is allocated to the identifiable assets based on relative fair values. Contingent consideration payments in asset acquisitions are recognized when the contingency is resolved and the consideration is paid or becomes payable.

See Notes 12 (Commitments and Contingencies) and 13 (Agreements) for further discussion on the Company’s exclusive license agreement with Jacobus Pharmaceutical Company, Inc. (Jacobus), for the rights to develop and commercialize RUZURGI® in the U.S. and Mexico, which the Company accounted for as an asset acquisition under ASC 805-50. See Note 13 (Agreements) for further discussion on the Company’s acquisitions of the U.S. rights to FYCOMPA® from Eisai Co., Ltd, and on the exclusive license for North America acquired from Santhera for AGAMREE®, both of which the Company accounted for as asset acquisitions under ASC 805-50.

k. INTANGIBLE ASSETS, NET. Identifiable intangible assets with a finite life are comprised of licensed rights and other acquired intangible assets and are amortized on a straight-line basis over the respective estimated useful life.

The Company reviews intangible assets with finite lives for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. If indicators of impairment exist, an impairment test is performed to assess the recoverability of the affected assets by determining whether the carrying amount of such assets exceeds the undiscounted expected future cash flows. If the affected assets are deemed not recoverable, the Company would estimate the fair value of the assets and record an impairment loss.

l. FAIR VALUE OF FINANCIAL INSTRUMENTS. The Company’s financial instruments consist of cash and cash equivalents, investments, accounts receivable, accounts payable, and accrued expenses and other liabilities. At March 31, 2024 and December 31, 2023, the fair value of these instruments approximated their carrying value.

m. FAIR VALUE MEASUREMENTS. Current Financial Accounting Standards Board (FASB) fair value guidance emphasizes that fair value is a market-based measurement, not an entity-specific measurement. Therefore, a fair value measurement should be determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair value measurements, current FASB guidance establishes a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions that it believes market participants would use in pricing assets or liabilities (unobservable inputs classified within Level 3 of the hierarchy).

Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability, which are typically based on an entity’s own assumptions, as there is little, if any, related market activity.

In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.

	Fair Value Measurements at Reporting Date Using (in thousands)
	Balances as of March 31, 2024		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and cash equivalents:
Money market funds	$	280,802	$	280,802	$	—	$	—
Investment in equity securities:
Equity securities	$	15,345	$	15,345	$	—	$	—

	Fair Value Measurements at Reporting Date Using (in thousands)
	Balances as of December 31, 2023		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and cash equivalents:
Money market funds	$	18,256	$	18,256	$	—	$	—
U.S. Treasuries	$	94,523	$	94,523	$	—	$	—
Investment in equity securities:
Equity securities	$	16,489	$	16,489	$	—	$	—

n. OPERATING LEASES. The Company determines if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (ROU) assets, other current liabilities, and operating lease liabilities on its consolidated balance sheets. Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. As the Company’s lease does not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at commencement date in determining the present value of future payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives and initial direct costs incurred. The Company’s lease term includes options to extend or terminate the lease, however, these options are not considered in the lease term as the Company is not reasonably certain that it will exercise these options. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term. The Company has a lease agreement with lease and non-lease components, which are accounted for separately.

o. SHARE REPURCHASES. In March 2021, the Company’s Board of Directors approved a share repurchase program that authorizes the repurchase of up to $40 million of the Company’s common stock.

The Company accounts for share repurchases by charging the excess of the repurchase price over the repurchased common stock’s par value entirely to retained earnings. All repurchased shares are retired and become authorized but unissued shares. The Company accrues for the shares purchased under the share repurchase plan based on the trade date. The Company may terminate or modify its share repurchase program at any time.

p. REVENUE RECOGNITION.

Product Revenues:

To determine revenue recognition for arrangements that are within the scope of Accounting Standards Codification (ASC) Topic 606 – Revenue from Contracts with Customers (Topic 606), the Company 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, (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. The Company assesses the goods or services promised within each contract and determines those that are performance obligations by assessing whether each promised good or service is distinct. The Company then recognizes as revenue the amount of the transaction price that is allocated to the respective performance obligation when (or as) the performance obligation is satisfied. For a complete discussion of accounting for product revenue, see Product Revenue, Net below.

The Company also may generate revenues from payments received under collaborative and license agreements. Collaborative and license agreement payments may include nonrefundable fees at the inception of the agreements, contingent payments for specific achievements designated in the agreements, and/or net profit-sharing payments on sales of products resulting from the collaborative and license arrangements. For a complete discussion of accounting for collaborative and licensing arrangements, see Revenues from Collaboration and Licensing Arrangements below.

The Company recognizes revenue when its customers obtain title of the promised goods, in an amount that reflects the consideration to which the Company expects to be entitled in exchange for these goods. For FIRDAPSE® and AGAMREE®, subsequent to receiving FDA approvals, the Company entered into an arrangement with one distributor (the Customer), which is the exclusive distributor of FIRDAPSE® and AGAMREE® in the U.S. The Customer subsequently resells FIRDAPSE® and AGAMREE® to a small group of exclusive specialty pharmacies (SPs) whose dispensing activities for patients with specific payors may result in government-mandated or privately negotiated rebate obligations for the Company with respect to the purchase of FIRDAPSE® and AGAMREE®.

During 2023, the Company sold FYCOMPA®, through a Transition Service Agreement with Eisai to major wholesalers, specialty pharmaceutical distributors, managed care organizations, and government agencies. The transition services under the Transition Services Agreement ended on December 31, 2023, and beginning on January 1, 2024, the Company commenced sales of FYCOMPA® in the U.S. commercial market to major wholesalers, specialty pharmaceutical distributors, managed care organizations, and government agencies.

Product Revenue, Net: The Company recognizes revenue on product sales when its’ customers obtain control of the Company’s products, which occur at a point in time (upon delivery or upon dispense to patient). Product revenue is recorded net of applicable reserves for variable consideration, including discounts and allowances. The Company’s payment terms range between 15 and 60 days.

Shipping and handling costs for product shipments occur prior to the customer obtaining control of the goods and are recorded in cost of sales.

If taxes should be collected from the Customer relating to product sales and remitted to governmental authorities, they will be excluded from revenue. The Company expenses incremental costs of obtaining a contract when incurred if the expected amortization period of the asset that the Company would have recognized is one year or less. However, no such costs were incurred during the three months ended March 31, 2024 and 2023.

During the three months ended March 31, 2024 and 2023, substantially all of the Company’s product revenues were from sales to customers in the U.S.

The following table summarizes the Company’s net product revenue disaggregated by product (in thousands):

	For the Three Months Ended March 31,
	2024		2023
FIRDAPSE®	$	66,842	$	57,526
FYCOMPA®		30,425		27,778
AGAMREE®		1,174		—
Total product revenue, net	$	98,441	$	85,304

Reserves for Variable Consideration: Revenue from product sales is recorded at the net sales price (transaction price), which includes estimates of variable consideration for which reserves are established. Components of variable consideration include trade discounts and allowances, prompt payment discounts, product returns, provider chargebacks and discounts, government rebates, and other incentives, such as voluntary patient assistance, and other allowances that are offered within contracts between the Company and its customers relating to the Company’s sale of its products. These reserves, as detailed below, are based on the amounts earned, or to be claimed on the related sales, and are classified as reductions of accounts receivable (if the amount is payable to its customers) or a current liability (if the amount is payable to a party other than its customers).

These estimates take into consideration a range of possible outcomes which are probability-weighted in accordance with the expected value method in Topic 606 for relevant factors such as current contractual and statutory requirements, specific known market events and trends, industry data, and forecasted customer buying and payment patterns. Overall, these reserves reflect the Company’s best estimates of the amount of consideration to which it is entitled based on the terms of the respective underlying contracts.

The amount of variable consideration which is included in the transaction price may be constrained and is included in the net sales price only to the extent that it is probable that a significant reversal in the amount of the cumulative revenue recognized under the contract will not occur in a future period. The Company’s analyses also contemplates application of the constraint in accordance with the guidance, under which it determined a material reversal of revenue would not occur in a future period for the estimates detailed below as of March 31, 2024 and, therefore, the transaction price was not reduced further during the three months ended March 31, 2024 and 2023. Actual amounts of consideration ultimately received may differ from the Company’s estimates. If actual results in the future vary from the Company’s estimates, the Company will adjust these estimates, which would affect net product revenue and earnings in the period such variances become known.

Trade Discounts, Allowances and Wholesaler Fees: The Company provides its customers with a discount that is explicitly stated in its contract and is recorded as a reduction of revenue in the period the related product revenue is recognized. To the extent the services received are distinct from the sale of products to its customers, these payments are classified in selling, general and administrative expenses in the Company’s consolidated statements of operations and comprehensive income. However, if the Company has determined such services received are not distinct from the Company’s sale of products to its customers, these payments have been recorded as a reduction of revenue within the consolidated statements of operations and comprehensive income through March 31, 2024 and 2023, as well as a reduction to accounts receivable, net on the consolidated balance sheets.

Prompt Payment Discounts: The Company provides its customers with prompt payment discounts which may result in adjustments to the price that is invoiced for the product transferred, in the case that payments are made within a defined period. The prompt payment discount reserve is based on actual invoice sales and contractual discount rates. Reserves for prompt payment discounts are included in accounts receivable, net on the consolidated balance sheets.

Funded Co-pay Assistance Program: The Company contracts with a third-party to manage the co-pay assistance program intended to provide financial assistance to qualified commercially-insured patients. The calculation of the accrual for co-pay assistance is based on an estimate of claims and the cost per claim that the Company expects to receive associated with its products, that have been recognized as revenue, but remains in the distribution channel at the end of each reporting period. These payments are considered payable to the third-party vendor and the related reserve is 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 in accrued expenses and other liabilities in the consolidated balance sheets.

Product Returns: Consistent with industry practice, the Company offers its customers limited product return rights for damaged and expiring product, provided it is within a specified period around the product expiration date as set forth in the applicable individual distribution or master agreement. The Company estimates the amount of its product sales that may be returned by its customers and records this estimate as a reduction of revenue in the period in which the related product revenue is recognized. The Company currently estimates product return liabilities using available industry data and its own sales information, including its visibility into the inventory remaining in the distribution channel. Return payments related to the sale of products are considered payable to the third-party vendor and the related reserve is 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 in accrued expenses and other liabilities in the consolidated balance sheets.

Provider Chargebacks and Discounts: Chargebacks for fees and discounts to providers represent the estimated obligations resulting from contractual commitments to sell products to qualified healthcare providers at prices lower than the list prices charged to the customer, who directly purchases the product from the Company. The customer charges the Company for the difference between what they paid for the product and the ultimate selling price to the qualified healthcare providers. The Company also participates in programs with government entities and other parties, including covered entities under the 340B Drug Pricing Program, whereby pricing on FYCOMPA® is extended below wholesaler list price to participating entities (the FYCOMPA® Participants). These entities purchase FYCOMPA® through wholesalers at the lower program price and the wholesalers then charge the Company the difference between their acquisition cost and the lower program price.

These reserves are established in the same period that the related revenue is recognized, resulting in a reduction of product revenue, net and accounts receivable, net. Chargeback amounts are generally determined at the time of resale to the qualified healthcare provider by the customer or at the time of a resale to a FYCOMPA® Participant by a wholesaler, and the Company generally issues credits for such amounts within a few weeks of the customer or wholesalers’ notification to the Company of the resale. Reserves for chargebacks consist primarily of chargebacks that the customer or wholesalers have claimed, but for which the Company has not yet issued a credit.

Government Rebates: The Company is subject to discount obligations under state Medicaid, Medicare and other government programs. These reserves are recorded in the same period the related revenue is recognized, resulting in a reduction of product revenue. For reserves related to the sale of its products, there is an establishment of a current liability, which is included in accrued expenses and other liabilities on the consolidated balance sheets. For Medicare, the Company also estimates the number of patients in the prescription drug coverage gap for whom the Company will owe an additional liability under the Medicare Part D program.

The Company’s 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 estimated future claims that will be made for product that has been recognized as revenue, but which remains in the distribution channel inventories at the end of each reporting period.

Payor Rebates: The Company contracts with certain private payor organizations, primarily insurance companies and pharmacy benefit managers, for the payment of rebates with respect to utilization of its products. The Company estimates these rebates and records such estimates in the same period the related revenue is recognized, resulting in a reduction of product revenue, net and the establishment of a current liability, which is included in accrued expenses and other liabilities on the consolidated balances sheets.

Bridge and Patient Assistance Programs: The Company provides FIRDAPSE® and AGAMREE® free of charge to uninsured patients who satisfy pre-established criteria for either the Bridge Program or the Patient Assistance Program. Patients who meet the Bridge Program eligibility criteria and are transitioning from investigational product while they are waiting for a coverage determination, or later, for patients whose access is threatened by the complications arising from a change of insurer may receive a temporary supply of free FIRDAPSE® or AGAMREE® while the Company is determining the patient’s third-party insurance, prescription drug benefit or other third-party coverage for FIRDAPSE® or AGAMREE®. The Patient Assistance Program provides FIRDAPSE® or AGAMREE® free of charge for longer periods of time for those who are uninsured or functionally uninsured with respect to FIRDAPSE® or AGAMREE® because they are unable to obtain coverage from their payor despite having health insurance, to the extent allowed by applicable law.

The Company provides FYCOMPA® free of charge to uninsured patients who satisfy pre-established criteria through a Patient Assistance Program. In addition, Catalyst provides programs to assist patients through the process for obtaining reimbursement approval for their FYCOMPA® prescriptions from their insurers. Catalyst also provides support for patients using FYCOMPA® through an Instant Savings Card Program.

The Company does not recognize any revenue related to these free products and the associated costs are classified in selling, general and administrative expenses in the Company’s consolidated statements of operations and comprehensive income.

Revenues from Collaboration and Licensing Arrangements:

The Company analyzes license and collaboration arrangements pursuant to FASB ASC Topic 808, Collaborative Arrangement Guidance and Consideration (Topic 808), to assess whether such arrangements, or transactions between arrangement participants, 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 or are more akin to a vendor-customer relationship. In making this evaluation, the Company considers whether the activities of the collaboration are considered to be distinct and deemed to be within the scope of the collaborative arrangement guidance or if they are more reflective of a vendor-customer relationship and, therefore, within the scope of Topic 606. This assessment is performed throughout the life of the arrangement based on changes in the responsibilities of all parties in the arrangement.

For elements of collaboration arrangements that are not accounted for pursuant to guidance in Topic 606, an appropriate recognition method is determined and applied consistently, generally by analogy to the revenue from contracts with customers guidance.

The Company evaluates the performance obligations promised in the contract that are based on goods and services that will be transferred to the customer and determines whether those obligations are both (i) capable of being distinct and (ii) distinct in the context of the contract. Goods or services that meet these criteria are considered distinct performance obligations. The Company estimates the transaction price based on the amount expected to be received for transferring the promised goods or services in the contract. The consideration may include fixed consideration or variable consideration.

The agreements provide for milestone payments upon achievement of development and regulatory events. The Company accounts for milestone payments as variable consideration in accordance with Topic 606. At the inception of each arrangement that includes variable consideration, the Company evaluates the amount of potential transaction price and the likelihood that the transaction price will be received. The Company utilizes either the most likely amount method or expected value method to estimate the amount expected to be received based on which method best predicts the amount expected to be received. The amount of variable consideration that is included in the transaction price may be constrained and is included in the transaction price only to the extent that it is probable that a significant reversal in the amount of the cumulative revenue recognized will not occur in a future period. Arrangements that include rights to additional goods or services that are exercisable at a customer’s discretion are generally considered options. The Company assesses if these options provide a material right to the customer and, if so, these options are considered performance obligations.

After contract inception, the transaction price is reassessed at every period end and updated for changes such as resolution of uncertain events. Any change in the overall transaction price is allocated to the performance obligations based on the same methodology used at contract inception.

The Company recognizes sales-based royalties or net profit-sharing when the latter of (a) the subsequent sale occurs, or (b) the performance obligation to which the sales-based royalty or net profit-sharing has been allocated has been satisfied.

Payments to and from the collaborator are presented in the statement of operations based on the nature of the Company’s business operations, the nature of the arrangement, including the contractual terms, and the nature of the payments.

Refer to Note 11 (Collaborative and Licensing Arrangements), for further discussion on the Company’s collaborative and licensing arrangements.

q. RESEARCH AND DEVELOPMENT. Costs incurred in connection with research and development activities are expensed as incurred. These costs consist of direct and indirect costs associated with specific projects, as well as fees paid to various entities that perform research-related services for the Company.

The Company records upfront and milestone payments made to third parties under licensing and collaboration arrangements that occur before a compound receives regulatory approval as acquired in-process research and development (IPR&D). IPR&D acquired as part of an asset acquisition with no alternative future use is expensed immediately to research and development. Milestone payments made after regulatory approval are capitalized as a developed asset and unless the asset is determined to have an indefinite life, the Company amortizes its definite-lived intangible assets using the straight-line method, which is considered the best estimate of economic benefit, over its estimated useful life.

r. ADVERTISING EXPENSE. Advertising costs are expensed as incurred. The Company incurred $3.9 million and $1.7 million in advertising costs during the three months ended March 31, 2024 and 2023, respectively, which are included in selling, general and administrative expenses in the Company’s consolidated statements of operations and comprehensive income.

s. STOCK-BASED COMPENSATION. The Company recognizes expense in the consolidated statements of operations and comprehensive income for the grant date fair value of all stock-based payments to employees, directors and consultants, including grants of stock options and other share-based awards. For stock options, the Company uses the Black-Scholes option valuation model, the single-option award approach, and the straight-line attribution method. Using this approach, compensation cost is amortized on a straight-line basis over the vesting period of each respective stock option, generally one to three years. Forfeitures are recognized as a reduction of stock-based compensation expense as they occur.

t. CONCENTRATION OF RISK. The financial instruments that potentially subject the Company to concentration of credit risk are cash equivalents, investments and accounts receivable, net. The Company places its cash and cash equivalents with high-credit quality financial institutions. These amounts at times may exceed federally insured limits. The Company has not experienced any credit losses in these accounts.

The Company sells its products, FIRDAPSE® and AGAMREE®, in the U.S. through an exclusive distributor (its Customer) to SPs. Therefore, its distributor and SPs account for principally all of its trade receivables and net product revenues related to this product. The Company sells its product, FYCOMPA® to major wholesalers, specialty pharmaceutical distributors, managed care organizations, and government agencies. The creditworthiness of its customers is continuously monitored, and the Company has internal policies regarding customer credit limits. The Company estimates an allowance for expected credit loss primarily based on the credit worthiness of its customers, historical payment patterns, aging of receivable balances and general economic conditions.

As of March 31, 2024, the Company had three FDA approved products, which makes it difficult to evaluate its current business, predict its future prospects, and forecast financial performance and growth. The Company had invested a significant portion of its efforts and financial resources in the development and commercialization of its lead product, FIRDAPSE®. The Company expects FIRDAPSE® and the recently acquired products FYCOMPA® and AGAMREE® to constitute virtually all of the Company’s product revenue for the foreseeable future.

The Company relies exclusively on third parties to formulate and manufacture its products and any future drug candidates. The commercialization of its products and any other drug candidates, if approved, could be stopped, delayed or made less profitable if those third parties fail to provide sufficient quantities of product or fail to do so at acceptable quality levels or prices. The Company does not intend to establish its own manufacturing facilities. The Company is using the same third-party contractors to manufacture, supply, store and distribute drug supplies for clinical trials and for the commercialization of FIRDAPSE®. The Company relies on the same third-party manufacturers for FYCOMPA® as utilized by Eisai prior to the Company’s acquisition in January 2023. It also relies on Santhera as its sole source of supply for AGAMREE®. If the Company is unable to continue its relationships with one or more of these third-party contractors, it could experience delays in the development or commercialization efforts as it locates and qualifies new manufacturers. The Company intends to rely on one or more third-party contractors to manufacture the commercial supply of its drugs.

The following table illustrates the approximate percentage of the Company’s total net product revenue attributed to the Company’s largest customers for the periods presented:

	For the Three Months Ended March 31,
	2024			2023
Customer A		69.1	%		67.4	%
Customer B*		—			32.6	%
Customer C		10.5	%		—
Customer D		10.1	%		—
Total		89.7	%		100.0	%

*During 2023, the Company sold FYCOMPA® through a Transition Service Agreement with Eisai. Effective January 1, 2024, FYCOMPA® is being sold and distributed through a 3PL organization.

u. ROYALTIES. Royalties incurred in connection with the Company’s license agreement for FIRDAPSE® and AGAMREE®, as disclosed in Note 13 (Agreements), are expensed to cost of sales as revenue from product sales is recognized.

Royalties incurred in connection with the Company’s license agreement for RUZURGI®, as disclosed in Note 13 (Agreements), are expensed to cost of sales as revenue from product sales is recognized for any royalties in excess of the minimum annual royalty payment from July 11, 2022 (the Effective Date) through 2025. The minimum royalty payment that exists annually for calendar years from the Effective Date through 2025 of $3 million are included in the purchase price of the agreement.

v. INCOME TAXES. The Company utilizes the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on differences between the financial reporting and tax basis of assets and liabilities and are measured using enacted tax rates and laws that will be in effect when the differences are expected to reverse. A valuation allowance is provided when it is more likely than not that some portion or all of a deferred tax asset will not be realized.

The Company recognizes the financial statement benefit of a tax position only after determining that the relevant tax authority would more likely than not sustain the position following an audit. For tax positions meeting the more-likely-than-not threshold, the amount recognized in the financial statements is the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement with the relevant tax authority. The Company is subject to income taxes in the U.S. federal jurisdiction and various state jurisdictions. Tax regulations within each jurisdiction are subject to the interpretation of the related tax laws and regulations and require significant judgment to apply. The Company is not subject to U.S. federal, state and local tax examinations by tax authorities for years before 2020. If the Company were to subsequently record an unrecognized tax benefit, associated penalties and tax related interest expense would be reported as a component of income tax expense.

w. COMPREHENSIVE INCOME. U.S. GAAP requires that all components of comprehensive income be reported in the financial statements in the period in which they are recognized. Comprehensive income is net income, plus certain other items that are recorded directly into stockholders’ equity. The Company’s comprehensive income is shown on the consolidated statements of operations and comprehensive income for the three months ended March 31, 2024 and 2023, and is comprised of net unrealized gains (losses) on the Company’s available-for-sale securities.

x. NET INCOME PER COMMON SHARE. Basic net income per share is computed by dividing net income for the period by the weighted average number of common shares outstanding during the period. With regard to common stock subject to vesting requirements, the calculation includes only the vested portion of such stock and units.

Diluted net income per common share is computed by dividing net income by the weighted average number of common shares outstanding, increased by the assumed conversion of other potentially dilutive securities during the period.

The following table reconciles basic and diluted weighted average common shares:

	For the Three Months Ended March 31,
	2024		2023
Basic weighted average common shares outstanding		116,806,117		105,561,229
Effect of dilutive securities		6,597,509		8,424,900
Diluted weighted average common shares outstanding		123,403,626		113,986,129

Outstanding common stock equivalents totaling approximately 5.2 million and 1.3 million, were excluded from the calculation of diluted net income per common share for the three months ended March 31, 2024 and 2023, respectively, as their effect would be anti-dilutive.

y. SEGMENT INFORMATION. Management has determined that the Company operates in one reportable segment, which is the development and commercialization of drug products.

z. RECLASSIFICATIONS. Certain prior year amounts in the consolidated financial statements have been reclassified to conform to the current year presentation.

aa. RECENTLY ISSUED ACCOUNTING STANDARDS. The Company did not adopt any accounting standards during the quarter ended March 31, 2024.

In November 2023, the FASB issued ASU No. 2023-07, Improvements to Reportable Segment Disclosures (ASU 2023-07) which is intended to improve reportable segment disclosures primarily through enhanced disclosure of reportable segment expenses and requires that a public entity that has a single reportable segment provide all the disclosures required by ASU 2023-07 and all existing segment disclosures in Topic 280. The new guidance is required to be applied retrospectively to all prior periods presented in the financial statements and is effective for the Company for fiscal periods beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. The Company has one reportable segment and is evaluating the impact of the standard on the Company’s consolidated financial statements.

In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures which requires significant disclosures about income taxes, primarily focused on the disclosure of income taxes paid and the rate reconciliation table. The new guidance will be applied prospectively and is effective for the Company for fiscal periods beginning after December 15, 2024. The Company is evaluating the impact of the standard on the Company’s consolidated financial statements.

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Investments

3 Months Ended

Mar. 31, 2024

Investments, Debt and Equity Securities [Abstract]

Investments

3. Investments.

Available-for-sale investments by security type were as follows (in thousands):

	Estimated Fair Value		Gross Unrealized Gains		Gross Unrealized Losses		Amortized Cost
At March 31, 2024:
U.S. Treasuries—Cash equivalents	$	—	$	—	$	—	$	—
Total	$	—	$	—	$	—	$	—
At December 31, 2023:
U.S. Treasuries—Cash equivalents	$	94,523	$	18	$	—	$	94,505
Total	$	94,523	$	18	$	—	$	94,505

There were no realized gains or losses from available-for-sale securities for the three months ended March 31, 2024 or 2023.

	For the Three Months Ended March 31,
	2024			2023
Equity securities:
Net gains (losses) recognized during the period on equity securities	$	(1,144	)	$	—
Unrealized net gains (losses) recognized during the period on equity securities still held at the reporting date	$	(1,144	)	$	—

There were no sales of equity securities during the three months ended March 31, 2024 and 2023. Unrealized net gains (losses) recognized during the periods on equity securities are included in other income, net in the consolidated statements of operations.

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Accumulated Other Comprehensive Income

3 Months Ended

Mar. 31, 2024

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Income

4. Accumulated Other Comprehensive Income.

The following table summarizes the changes in accumulated other comprehensive income, net of tax from unrealized gains (losses) on available-for-sale securities (in thousands), the Company’s only component of accumulated other comprehensive income for the three months ended March 31, 2024 and 2023.

There were no reclassifications out of accumulated other comprehensive income during the three months ended March 31, 2024 or 2023.

	Total Accumulated Other Comprehensive Income
Balance at December 31, 2023	$	14
Other comprehensive gain (loss) before reclassifications		(14	)
Amount reclassified from accumulated other comprehensive income		—
Net current period other comprehensive gain (loss)		(14	)
Balance at March 31, 2024	$	—

	Total Accumulated Other Comprehensive Income
Balance at December 31, 2022	$	24
Other comprehensive gain (loss) before reclassifications		(13	)
Amount reclassified from accumulated other comprehensive income		—
Net current period other comprehensive gain (loss)		(13	)
Balance at March 31, 2023	$	11

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Inventory

3 Months Ended

Mar. 31, 2024

Inventory Disclosure [Abstract]

Inventory

5. Inventory.

Inventory consists of the following (in thousands):

	March 31, 2024		December 31, 2023
Raw materials	$	5,926	$	1,910
Work-in-process		3,963		4,573
Finished goods		10,064		9,161
Total inventory	$	19,953	$	15,644

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Prepaid Expenses and Other Current Assets

3 Months Ended

Mar. 31, 2024

Text Block [Abstract]

Prepaid Expenses and Other Current Assets

6. Prepaid Expenses and Other Current Assets.

Prepaid expenses and other current assets consist of the following (in thousands):

	March 31, 2024		December 31, 2023
Prepaid manufacturing costs	$	2,005	$	2,005
Prepaid tax		307		1,238
Prepaid insurance		952		1,332
Prepaid subscriptions fees		1,937		1,299
Prepaid research fees		1,513		1,500
Prepaid commercialization expenses		2,951		3,038
Due from collaborative and licensing arrangements		143		138
Prepaid conference and travel expenses		844		771
Prepaid co-pay assistance program		1,561		863
Other		1,532		351
Total prepaid expenses and other current assets	$	13,745	$	12,535

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Operating Leases

3 Months Ended

Mar. 31, 2024

Operating Lease, Lease Income [Abstract]

Operating Leases

7. Operating Leases.

The Company has an operating lease agreement for its corporate office. The lease includes an option to extend the lease for up to 5 years and options to terminate the lease within 6 and 7.6 years. There are no obligations under finance leases.

The Company entered into an agreement in May 2020 that amended its lease for its office facilities. Under the amended lease, the Company’s leased space increased from approximately 7,800 square feet of space to approximately 10,700 square feet of space. The amended lease commenced in March 2021 when construction of the asset was completed and space became available for use.

The components of lease expense were as follows (in thousands):

	For the Three Months Ended March 31,
	2024		2023
Operating lease cost	$	108	$	108

Supplemental cash flow information related to lease was as follows (in thousands):

	For the Three Months Ended March 31,
	2024		2023
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows	$	129	$	125
Right-of-use assets obtained in exchange for lease obligations:
Operating lease	$	22	$	22

Supplemental balance sheet information related to lease was as follows (in thousands):

	March 31, 2024		December 31, 2023
Operating lease right-of-use assets	$	2,440	$	2,508
Other current liabilities	$	377	$	369
Operating lease liabilities, net of current portion		3,091		3,188
Total operating lease liabilities	$	3,468	$	3,557

As of March 31, 2024 and December 31, 2023, the weighted average remaining lease term was 7.1 years and 7.3 years, respectively. The weighted average discount rate used to determine the operating lease liabilities was 4.51% as of March 31, 2024 and December 31, 2023.

Remaining payments of lease liabilities as of March 31, 2024 were as follows (in thousands):

2024 (remaining nine months)	$	394
2025		537
2026		553
2027		570
2028		587
Thereafter		1,440
Total lease payments		4,081
Less: imputed interest		(613	)
Total	$	3,468

Rent expense was approximately $0.1 million for each of the three-month periods ended March 31, 2024 and 2023.

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Property and Equipment, Net

3 Months Ended

Mar. 31, 2024

Property, Plant and Equipment [Abstract]

Property and Equipment, Net

8. Property and Equipment, Net.

Property and equipment, net consists of the following (in thousands):

	March 31, 2024			December 31, 2023
Furniture and equipment	$	692		$	494
Leasehold improvements		991			991
Software		433			433
Less: Accumulated depreciation		(808	)		(723	)
Total property and equipment, net	$	1,308		$	1,195

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License and Acquired Intangibles, Net

3 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

License and Acquired Intangibles, Net

9. License and Acquired Intangibles, Net.

The following table presents the Company’s intangible assets at March 31, 2024 (in thousands):

	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Intangible assets:
License and acquired intangibles for RUZURGI®	$	33,569	$	3,998	$	29,571
License and acquired intangibles for FYCOMPA®		158,143		37,580		120,563
License and acquired intangibles for AGAMREE®		36,000		1,429		34,571
Total	$	227,712	$	43,007	$	184,705

The following table presents the Company’s intangible assets at December 31, 2023 (in thousands):

	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Intangible assets:
License and acquired intangibles for RUZURGI®	$	33,569	$	3,418	$	30,151
License and acquired intangibles for FYCOMPA®		158,143		29,673		128,470
License and acquired intangibles for AGAMREE®		36,000		572		35,428
Total	$	227,712	$	33,663	$	194,049

The Company amortizes its definite-lived intangible assets using the straight-line method, which is considered the best estimate of economic benefit, over its estimated useful life. The estimated useful life used for this purpose for RUZURGI®, FYCOMPA® and AGAMREE® was approximately 14.5 years, 5 years and 10.5 years, respectively.

The Company recorded approximately $0.6 million in amortization expense related to the licensed and acquired intangibles for RUZURGI® during each of the three months ended March 31, 2024 and 2023, within selling, general and administrative expenses in the consolidated statements of operations and comprehensive income. The Company recorded approximately $7.9 million and $6.0 million in amortization expense related to the licensed and acquired intangibles for FYCOMPA® during the three months ended March 31, 2024 and 2023, respectively, within cost of sales in the consolidated statement of operations and comprehensive income. The Company recorded approximately $0.9 million and $0 in amortization expense related to the licensed and acquired intangibles for AGAMREE® during the three months ended March 31, 2024 and 2023, respectively, within cost of sales in the consolidated statement of operations and comprehensive income. Amortization of the FYCOMPA®, RUZURGI® and AGAMREE® intangible assets are reported together as amortization of intangible assets in the consolidated statements of operations and comprehensive income.

The following table presents future amortization expense the Company expects for its intangible assets (in thousands):

2024 (remaining nine months)	$	28,034
2025		37,378
2026		37,378
2027		37,378
2028		7,705
Thereafter		36,832
Total	$	184,705

At March 31, 2024 and December 31, 2023, the weighted average amortization period remaining for intangible assets was 6.2 years and 6.5 years, respectively.

If all or a portion of the intangible assets are deemed not recoverable, the Company would estimate the fair value of the assets and record an impairment loss. There were no impairment charges recognized on definite-lived intangibles for the three months ended March 31, 2024 or 2023.

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Accrued Expenses and Other Liabilities

3 Months Ended

Mar. 31, 2024

Payables and Accruals [Abstract]

Accrued Expenses and Other Liabilities

10. Accrued Expenses and Other Liabilities.

Accrued expenses and other liabilities consist of the following (in thousands):

	March 31, 2024		December 31, 2023
Accrued preclinical and clinical trial expenses	$	527	$	1,015
Accrued professional fees		5,856		4,730
Accrued compensation and benefits		4,852		8,883
Accrued license fees		8,934		24,437
Accrued purchases		694		192
Operating lease liability		377		369
Accrued gross-to-net revenue liabilities*		24,885		6,877
Accrued income tax		7,340		729
Due to licensor		12,205		12,540
Accrued interest payable		1,204		1,031
Accrued charitable contributions		1,800		—
Other		631		465
Current accrued expenses and other liabilities		69,305		61,268
Lease liability – non-current		3,091		3,188
Due to licensor – non-current		1,859		2,497
Other – non-current		748		485
Non-current accrued expenses and other liabilities		5,698		6,170
Total accrued expenses and other liabilities	$	75,003	$	67,438

*During 2023, the Company sold FYCOMPA® through a Transition Service Agreement with Eisai. Effective January 1, 2024, FYCOMPA® is being sold and distributed through a 3PL organization.

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Collaborative and Licensing Arrangements

3 Months Ended

Mar. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Collaborative and Licensing Arrangements

11. Collaborative and Licensing Arrangements.

Endo, Inc.

In December 2018, the Company entered into a collaboration and license agreement (Collaboration) with Endo, Inc. (formerly, Endo International plc) (Endo), for the further development and commercialization of generic Sabril® (vigabatrin) tablets through Endo’s U.S. Generic Pharmaceuticals segment, doing business as Par Pharmaceutical, Inc. (Par). Under the Collaboration, Endo assumes all development, manufacturing, clinical, regulatory, sales and marketing costs under the collaboration, while the Company is responsible for exercising commercially reasonable efforts to develop, or cause the development of, a final finished, stable dosage form of generic Sabril® tablets.

In October 2023, Endo informed the Company that it has discontinued work on the Collaboration for development and commercialization of vigabatrin and that it wished to terminate the arrangement. As the Company proceeds with the termination process, the Company does not expect the end of the collaboration to have a material impact on the Company’s consolidated financial statements.

KYE Pharmaceuticals Inc.

In August 2020, the Company entered into a collaboration and license agreement with KYE Pharmaceuticals Inc. (KYE), for the commercialization of FIRDAPSE® in Canada.

Under the agreement, Catalyst granted KYE an exclusive license to commercialize and market FIRDAPSE® in Canada. KYE assumes all selling and marketing costs under the collaboration, while the Company is responsible for supply of FIRDAPSE® based on the collaboration partner’s purchase orders.

Under the terms of the agreement, the Company will receive an up-front payment, received payment upon transfer of Marketing Authorization and delivery of commercial product, received payment for supply of FIRDAPSE®, and will receive milestone payments and a sharing of defined net profits upon commercialization from KYE consisting of a mid-double-digit percent of net sales of FIRDAPSE®. The Company has also agreed to the sharing of certain development expenses. Unless terminated earlier in accordance with its terms, the collaboration continues in effect until the date that is ten years following the commercial launch of the product in Canada.

This agreement is in form identified as a collaborative agreement and the Company has concluded for accounting purposes that it also represents a contract with a customer. This is because the Company grants to KYE a license and provides supply of FIRDAPSE® in exchange for consideration, which are outputs of the Company’s ongoing activities. Accordingly, the Company has concluded that this collaborative arrangement will be accounted for pursuant to Topic 606.

The collaborative agreement included a nonrefundable upfront license fee that was recognized upon transfer of the license based on a determination that the right is provided as the intellectual property exists at the point in time in which the license is granted.

Revenue from sales of FIRDAPSE® by KYE is recognized in the quarter in which the sales occurred.

Revenues from the arrangement with KYE for the three months ended March 31, 2024 and 2023 were not material. Revenue is included in license and other revenue in the accompanying consolidated statements of operations and comprehensive income. Expenses incurred, net have been included in selling, general and administrative expenses in the accompanying consolidated statements of operations and comprehensive income.

DyDo Pharma, Inc.

On June 28, 2021, the Company entered into a license agreement with DyDo Pharma, Inc. (DyDo), for the development and commercialization of FIRDAPSE® in Japan.

Under the agreement, DyDo has joint rights to develop FIRDAPSE®, and exclusive rights to commercialize the product, in Japan. DyDo is responsible for funding all clinical, regulatory, marketing and commercialization activities in Japan, while the Company is responsible for clinical and commercial supply based on purchase orders, as well as providing support to DyDo in its efforts to obtain regulatory approval for the product from the Japanese regulatory authorities.

Under the terms of the agreement, the Company has earned an up-front payment and may earn further development and sales milestones for FIRDAPSE®, as well as revenue on product supplied to DyDo.

The Company has concluded that this license agreement will be accounted for pursuant to Topic 606. The agreement included a nonrefundable upfront license fee that was recognized upon the effective date of the agreement as the intellectual property exists at the point in time in which the right to the license is granted. The Company determined the granting of the right to the license is distinct from the supply of FIRDAPSE® and represents a separate performance obligation in the agreement.

The agreement includes milestones that are considered a sales-based royalty in which the license is deemed to be the predominant item to which these milestones relate. Revenue will be recognized when the latter of (a) the subsequent sale occurs, or (b) the performance obligation to which the sales-based royalty has been allocated has been satisfied. Additionally, the agreement includes regulatory milestone payments which represent variable consideration, and due to uncertainty are fully constrained and only recognized when the uncertainty is subsequently resolved. For clinical and commercial supply of the product, the Company will recognize revenue when the Customer obtains control of the Company’s product, which will occur at a point in time which is generally at time of shipment.

There was $0 and $0.2 million in revenue from the arrangement with DyDo for the three months ended March 31, 2024 and 2023, respectively, which is included in product revenue, net in the accompanying consolidated statements of operations and comprehensive income.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

12. Commitments and Contingencies.

In May 2019, the FDA approved a NDA for RUZURGI®, Jacobus Pharmaceuticals’ version of amifampridine (3,4-DAP), for the treatment of pediatric LEMS patients (ages 6 to under 17). In June 2019 the Company filed suit against the FDA and several related parties challenging this approval and related drug labeling. Jacobus later intervened in the case. The Company’s complaint, which was filed in the federal district court for the Southern District of Florida, alleged that the FDA’s approval of RUZURGI® violated multiple provisions of FDA regulations regarding labeling, resulting in misbranding in violation of the Federal Food, Drug, and Cosmetic Act (FDCA); violated the Company’s statutory rights to Orphan Drug Exclusivity and New Chemical Entity Exclusivity under the FDCA; and was in multiple other respects arbitrary, capricious, and contrary to law, in violation of the Administrative Procedure Act. Among other remedies, the suit sought an order vacating the FDA’s approval of RUZURGI®.

On July 30, 2020, the Magistrate Judge considering this lawsuit filed a Report and Recommendation in which the Magistrate Judge recommended to the District Judge handling the case that the District Judge grant the FDA’s and Jacobus’ motions for summary judgment and deny the Company’s motion for summary judgment. On September 29, 2020, the District Judge adopted the Report and Recommendation of the Magistrate Judge, granted the FDA’s and Jacobus’ motions for summary judgment, and dismissed the Company’s case. The Company appealed the District Court’s decision to the U.S. Court of Appeals for the 11th Circuit. The case was fully briefed in early 2021, and oral argument was held in March 2021.

On September 30, 2021, a three-judge panel of 11th Circuit judges issued a unanimous decision overturning the District Court’s decision. The appellate court adopted the Company’s argument that the FDA’s approval of RUZURGI® violated the Company’s rights to Orphan Drug Exclusivity and remanded the case to the District Court with orders to enter summary judgment in the Company’s favor. In November 2021, Jacobus filed a motion seeking rehearing of the case from the full 11th Circuit, which motion was denied in January 2022. Further, in January 2022, Jacobus filed motions with both the 11th Circuit and the U.S. Supreme Court seeking a stay of the 11th Circuit’s ruling indicating that it would seek a review of the 11th Circuit’s decision from the U.S. Supreme Court. Both stay motions were denied, and on January 28, 2022, the 11th Circuit issued a mandate directing the District Court to enter summary judgment in the Company’s favor. The District Court entered that order on January 31, 2022. On February 1, 2022, the FDA informed Jacobus that, consistent with the Court of Appeals for the Eleventh Circuit’s September 30, 2021, decision in favor of Catalyst, the final approval of the RUZURGI® NDA was switched to a tentative approval until the 7-year orphan-drug exclusivity (ODE) for FIRDAPSE® has expired.

On July 11, 2022, the Company settled certain of its disputes with Jacobus. In connection with the settlement, the Company licensed the rights to develop and commercialize RUZURGI® in the U.S. and Mexico (the Territory). Simultaneously, the Company purchased, among other intellectual property rights, Jacobus’ U.S. patents related to RUZURGI®, its new drug applications in the U.S. for RUZURGI®, and certain RUZURGI® inventory previously manufactured by Jacobus. At the same time, the Company received a license from Jacobus for use of its know-how related to the manufacture of RUZURGI®. Further, the Company settled its patent case against Jacobus, which was dismissed without prejudice. Finally, Jacobus agreed that until the later of (i) the expiration of the royalty term or (ii) December 31, 2034, Jacobus and its affiliates, will not, directly or indirectly, research, develop, manufacture, commercialize, distribute, use or otherwise exploit any product competitive to FIRDAPSE® or RUZURGI® in the Territory, and Laura Jacobus, the sole shareholder of Jacobus, and two of Jacobus’ other officers, also signed individual non-competition agreements containing the same terms.

In connection with the settlement with Jacobus, the Company agreed to pay the following consideration to Jacobus:

• $30 million of cash, of which $10 million was paid at the closing of the settlement on July 11, 2022, $10 million was paid on the first anniversary of closing, and the remaining $10 million will be paid on the second anniversary of closing;

• An annual royalty on our net sales (as defined in the License and Asset Purchase Agreement between Catalyst and Jacobus) of amifampridine products in the U.S. equal to: (a) for calendar years 2022 through 2025, 1.5% (with a minimum annual royalty of $3.0 million per year), and (b) for calendar years 2026 through the expiration of the last to expire of the Company’s FIRDAPSE® patents in the U.S., 2.5% (with a minimum annual royalty of $5 million per year); provided, however, that the royalty rate may be reduced and the minimum annual royalty may be eliminated under certain circumstances; and

• If the Company were to receive a priority review voucher for FIRDAPSE® or RUZURGI® in the future, 50% of the consideration paid by a third-party to acquire that voucher will be paid to Jacobus.

The Company’s New Drug Submission filing for FIRDAPSE® for the symptomatic treatment of LEMS was approved when Health Canada issued a Notice of Compliance, or NOC, on July 31, 2020. In August 2020, the Company entered into a license agreement with KYE Pharmaceuticals, or KYE, pursuant to which the Company licensed to KYE the Canadian rights for FIRDAPSE® for the treatment of LEMS. On August 10, 2020, Health Canada issued a NOC to Medunik (Jacobus’ licensee in Canada for RUZURGI®) for the treatment of LEMS. Shortly thereafter, the Company initiated a legal proceeding in Canada seeking judicial review of Health Canada’s decision to issue the NOC for RUZURGI® as incorrect and unreasonable under Canadian law due to Medunik’s use of Catalyst’s protected data in its application. After two decisions by the trial judge to quash the RUZURGI® approval and remand the matter back to Health Canada, the Canadian Federal Appellate Court overturned the trial judge’s decision. The Minister subsequently reapproved RUZURGI®’s NOC for Canada in 2023. The Company does not expect the approval of RUZURGI® in Canada to have a material impact on the Company’s consolidated financial statements.

In January 2023, the Company received Paragraph IV Certification Notice Letters from three generic drug manufacturers advising that they had each submitted an Abbreviated New Drug Application (ANDA) to the FDA seeking authorization from the FDA to manufacture, use or sell a generic version of FIRDAPSE® in the U.S. The notice letters each alleged that the six patents listed in the FDA Orange Book covering FIRDAPSE® are not valid, not enforceable, and/or will not be infringed by the commercial manufacture, use or sale of the proposed product described in these ANDA submissions. Under the FDCA, as amended by the Drug Price Competition and Patent Term Restoration Act of 1984, as amended, the Company had 45 days from receipt of the notice letters to commence patent infringement lawsuits against these generic drug manufacturers in a federal district court to trigger a stay precluding the FDA from approving any ANDA until May 2026 or entry of judgment holding the patents invalid, unenforceable, or not infringed, whichever occurs first. In that regard, after conducting the necessary due diligence, the Company filed lawsuits on March 1, 2023 in the U.S. District Court for the District of New Jersey against each of the three generic drug manufacturers who notified the Company of their ANDA submissions, thus triggering the stay. Further, in October 2023, the Company received a Paragraph IV Certification Notice Letter from a fourth generic drug manufacturer, and the Company filed a similar lawsuit against the manufacturer in November 2023. The Company intends to vigorously protect and defend its intellectual property for FIRDAPSE® and, although there can be no assurance, the Company believes that its patent estate will protect FIRDAPSE® from generic competition for the life of the patents.

On February 20, 2023, the Company received a Paragraph IV Certification Notice Letter from a company that appears to have filed the first ANDA for the oral suspension formulation for FYCOMPA®. The same company sent a similar letter to the Company later in February with a similar certification for the tablet formulation for FYCOMPA®, the fourth such certification for this formulation. Both of these letters were paragraph IV certifications of non-infringement, non-validity, and unenforceability to the ‘497 patent for FYCOMPA® but each application, like the previous Paragraph IV notices from ANDA filers, for FYCOMPA® tablets does not challenge the ‘571 patent. Similar to the actions with the FIRDAPSE® Paragraph IV Certifications described above, after due diligence the Company filed lawsuits on April 5, 2023, in the U.S. District Court for the District of New Jersey against the drug manufacturer who notified the Company of their ANDA submissions for both FYCOMPA® formulations, thus triggering the 30-month stay for each application.

Additionally, from time to time the Company may become involved in legal proceedings arising in the ordinary course of business. Except as set forth above, the Company believes that there is no other litigation pending at this time that could have, individually or in the aggregate, a material adverse effect on its results of operations, financial condition, or cash flows.

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Agreements

3 Months Ended

Mar. 31, 2024

Text Block [Abstract]

Agreements

13. Agreements.

a. LICENSE AGREEMENT FOR FIRDAPSE®. On October 26, 2012, the Company entered into a license agreement with BioMarin Pharmaceutical, Inc. (BioMarin) for the North American rights to FIRDAPSE®. Under the license agreement, the Company pays: (i) royalties to the licensor for seven years from the first commercial sale of FIRDAPSE® equal to 7% of net sales (as defined in the license agreement) in North America for any calendar year for sales up to $100 million, and 10% of net sales in North America in any calendar year in excess of $100 million; and (ii) royalties to the third-party licensor of the rights sublicensed to the Company for seven years from the first commercial sale of FIRDAPSE® equal to 7% of net sales (as defined in the license agreement between BioMarin and the third-party licensor) in any calendar year for the duration of any regulatory exclusivity within a territory and 3.5% for territories in any calendar year in territories without regulatory exclusivity.

On May 29, 2019, the Company and BioMarin entered into an amendment to the Company’s license agreement for FIRDAPSE®. Under the amendment, the Company has expanded its commercial territory for FIRDAPSE®, which originally was comprised of North America, to include Japan. Additionally, the Company’s commercial territory will be expanded under the license agreement to include most of Asia, as well as Latin America, upon the acceptance by the Pharmaceuticals and Medical Devices Agency (PMDA) of a Japan MAA for FIRDAPSE® for LEMS. Under the amendment, the Company will pay royalties to our licensor on net sales in Japan of a similar percentage to the royalties that the Company is currently paying under its original license agreement for North America.

On December 18, 2023, DyDo filed a Japan NDA with the PMDA, which was accepted for filing upon its submission. As a result, the Company’s territory automatically expanded on that date to include most of Asia, as well as Latin America.

In January 2020, the Company was advised that BioMarin has transferred substantially all of its rights under the license agreement to SERB S.A., and SERB S.A. is now the Company’s licensor under the license agreement.

b. LICENSE AGREEMENT FOR RUZURGI®. On July 11, 2022 (the Effective Date), the Company entered into an exclusive license agreement with Jacobus Pharmaceutical Company, Inc. (Jacobus), for the rights to develop and commercialize RUZURGI® in the U.S. and Mexico.

Pursuant to the terms of the license agreement, the Company paid Jacobus a $10 million up-front payment on the Effective Date and also paid an additional $10 million on the first annual anniversary of the Effective Date (July 11, 2023). The Company is obligated to pay an additional $10 million on the second annual anniversary of the Effective Date (July 11, 2024). The Company is also obligated to pay tiered royalty payments on net sales (as defined in the license agreement) of all of the Company’s products in the U.S. that range from 1.25% to 2.5% based on whether there is a competing product or generic version of FIRDAPSE® being marketed or sold in the U.S.

A minimum royalty payment exists annually for calendar years from the Effective Date through 2025 of $3 million, provided that such minimum annual royalty payment shall be prorated in the first calendar year of the agreement. As these minimum payments are both probable and estimable, they are included in the purchase price of the agreement and any royalties in excess of this amount will be charged to cost of sales as revenue from product sales is recognized. A minimum royalty payment exists annually for calendar years from 2026 through the expiration of the royalty term (which ends when there is no valid claim under the Company’s FIRDAPSE® patents in the U.S.) of $5 million unless a competing product or generic version of FIRDAPSE® is being marketed or sold in the U.S. If these minimum payments become probable in the future, the Company would recognize a contingent liability at that time with an offset to the value of the intangible asset acquired. Any royalties in excess of this amount will be charged to cost of sales as revenue from product sales is recognized. Royalties over the minimum, if any, will be paid based on the agreement terms on a quarterly basis.

Assets acquired as part of the license agreement include among other intellectual property rights, Jacobus’ U.S. patents related to RUZURGI®, its new drug applications in the U.S. for RUZURGI®, its Trademark for RUZURGI®, the Orphan Drug Designation for RUZURGI® and a license from Jacobus for use of its know-how related to the manufacture of RUZURGI®.

Additionally, the Company also purchased from Jacobus approximately $4.1 million of RUZURGI® inventory previously manufactured by Jacobus, which were recorded as an expense in research and development expenses in the consolidated statement of operations and comprehensive income for 2022.

Under business combination guidance, the screen test states that if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets, the set is not considered a business and is accounted for as an asset acquisition. The Company has determined that the screen test was not met. However, the Company determined that the acquisition did not meet the definition of a business under ASC 805, Business Combination. The Company believes that the licensing agreement and other assets acquired from Jacobus are similar and considered them all to be intangible assets with the exception of the inventory acquired. As the screen test was not met, further determination was required to determine that the Company had not acquired inputs and processes that have the ability to create outputs, which would meet the requirements of a business, and therefore, determined that this was an asset acquisition. The Company accounted for the Jacobus license agreement as an asset acquisition under ASC 805-50, which requires the acquiring entity in an asset acquisition to recognize assets acquired and liabilities assumed based on the cost to the acquiring entity on a relative fair value basis, which includes consideration given.

The total purchase price was allocated to the acquired assets based on their relative fair values, as follows (in thousands):

License and acquired intangibles	$	33,569
Acquired research and development inventory expensed from asset acquisition		4,130
Total purchase price	$	37,699

The straight-line method is used to amortize the license and acquired intangibles, as disclosed in Note 9 (License and Acquired Intangibles, Net).

c. ACQUISITION OF U.S. RIGHTS FOR FYCOMPA®. On January 24, 2023, the Company acquired the U.S. Rights for FYCOMPA® (perampanel) CIII a commercial stage epilepsy asset, from Eisai Co., Ltd. (Eisai). The aggregate consideration for the acquisition was $164.2 million in cash, including the reimbursement of certain liabilities and the payment of transaction costs.

Eisai was eligible to receive a contingent payment of $25 million if a certain regulatory milestone was met. As meeting the regulatory milestone was not probable, the Company did not recognize any amount related to the milestone payments in the purchase price. Additionally, after the loss of patent exclusivity for FYCOMPA®, the Company may be obligated to pay certain royalties to Eisai on net sales of FYCOMPA®. As the transaction is accounted for as an asset acquisition under U.S. GAAP, the Company will recognize the royalty payments in cost of sales as revenue from product sales is recognized.

Royalties commencing on loss of exclusivity for each calendar year during the royalty term equal to 12% on net sales greater than $10 million and less than $100 million, 17% on net sales of greater than $100 million and less than $125 million and 22% on net sales greater than $125 million prior to the date of generic entry. Royalties equal to 6% on net sales greater than $10 million and less than $100 million, 8.5% on net sales of greater than $100 million and less than $125 million and 11% on net sales greater than $125 million after the date of generic entry.

The following table summarizes the aggregate amount paid for the assets acquired by the Company in connection with the acquisition of FYCOMPA® (in thousands):

Base cash payment	$	160,000
Cash paid for pro-rated prepaid expenses		1,576
Reimbursement on base purchase price(i)		(3,238	)
Transaction costs(ii)		5,870
Total purchase consideration	$	164,208

(i) Recorded in prepaid expenses and other current assets in the accompanying consolidated balance sheet as of the acquisition date and reimbursement was fully applied as of June 30, 2023.

(ii) As of March 31, 2024, the full $5.9 million has been paid in cash.

The acquisition of FYCOMPA® has been accounted for as an asset acquisition in accordance with FASB ASC 805-50. The Company accounted for the acquisition of FYCOMPA® as an asset acquisition because substantially all of the fair value of the assets acquired is concentrated in a single asset, the FYCOMPA® product rights. The FYCOMPA® products rights consist of certain patents and trademarks, at-market contracts and regulatory approvals, marketing assets, and other records, and are considered a single asset as they are inextricably linked. ASC 805-10-55-5A includes a screen test, which provides that if substantially all of the fair value of the assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets, the assets acquired are not considered to be a business. ASC 805 requires the acquiring entity in an asset acquisition to recognize assets acquired and liabilities assumed based on the cost to the acquiring entity on a relative fair value basis, which includes consideration given.

The total purchase price was allocated to the acquired assets based on their relative fair values, as follows (in thousands):

Inventory	$	4,100
Prepaid expenses and other current assets (samples)		130
Prepaid commercialization expenses		1,576
Property and equipment, net		433
License and acquired intangibles for FYCOMPA®		158,143
Accrued preclinical and clinical trial expenses		(174	)
Total purchase consideration	$	164,208

The straight-line method is used to amortize the license and acquired intangibles, as disclosed in Note 9 (License and Acquired Intangibles, Net).

d. LICENSE AGREEMENT FOR AGAMREE® (VAMOROLONE). In July 2023, the Company completed its acquisition from Santhera of an exclusive license for North America for AGAMREE® (vamorolone), a treatment for patients suffering with DMD which was approved by the FDA on October 26, 2023. On March 13, 2024, the Company announced the U.S. commercial launch of AGAMREE® for the treatment of DMD in patients aged two years or older. The license is for exclusive commercial rights in the U.S., Canada, and Mexico, as well as the right of first negotiation in Europe and Japan should Santhera pursue partnership opportunities in those jurisdictions. Additionally, the Company will hold North American rights for any future approved indications of AGAMREE®. The Company made an all-cash initial payment of $75 million at the closing of the acquisition to acquire the license.

Under the license agreement, the Company pays: (i) royalties to the licensor until the later of expiration of product exclusivity or ten years from the first commercial sale of AGAMREE® equal to 5% of net sales (as defined in the license agreement) in North America for any calendar year for sales equal to or less than $100 million (prior to December 31, 2025 only), 7% of net sales for sales in excess of $100 million and up to $200 million, 9% of net sales for sales in excess of $200 million and up to $300 million, 11% of net sales for sales in excess of $300 million; and (ii) royalties to the third-party licensor of the rights sublicensed to the Company until the later of expiration of product exclusivity or ten years from the first commercial sale of AGAMREE® equal to 7% of net sales (as defined in the license agreement) in North America for any single calendar year for sales equal to or less than $250 million, 8.5% of net sales for sales in excess of $250 million and up to $500 million, 10% of net sales for sales in excess of $500 million and up to $750 million, 12% of net sales for sales in excess of $750 million and up to $1 billion, 13% of net sales for sales in excess of $1 billion and up to $2 billion and 15% of net sales for sales in excess of $2 billion. Furthermore, the Company may pay Santhera sales-based milestones of up to $105 million as well as up to 11% percent royalties for all additional indications and milestones of up to $50 million for the first three additional indications.

Simultaneously, the Company made a strategic equity investment into Santhera by acquiring 1,414,688 of Santhera’s post reverse-split ordinary shares (representing approximately 11.26% of Santhera’s outstanding ordinary shares following the transaction), which are traded on the SIX Swiss Exchange, at an investment price of CHF 9.477 per share (corresponding to a mutually agreed volume-weighted average price prior to signing), with the funds invested into Santhera to be used by Santhera for Phase IV studies in DMD and further development of additional indications for AGAMREE®. The Company may also be obligated under certain circumstances to make milestone payments and to pay royalties to Santhera.

The following table summarizes the aggregate amount paid for the assets acquired by the Company in connection with the acquisition of AGAMREE® and the strategic equity investment (in thousands):

Initial cash payment	$	75,000
Investment in Santhera		13,465
Transaction costs		6,513
Total purchase consideration	$	94,978

The transaction has been accounted for as an asset acquisition in accordance with ASC 805-50. The Company accounted for the transaction as an asset acquisition because substantially all of the fair value of the assets acquired is concentrated in a single asset, the rights to develop, commercialize and manufacture AGAMREE®. The AGAMREE® rights consist of certain licenses and regulatory approvals and are considered a single asset as they are inextricably linked. ASC 805-10-55-5A includes a screen test, which provides that if substantially all of the fair value of the assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets, the assets acquired are not considered to be a business. Additionally, the Company did not acquire a substantive process. ASC 805 requires the acquiring entity in an asset acquisition to recognize assets acquired and liabilities assumed based on the cost to the acquiring entity on a relative fair value basis, which includes consideration given. Goodwill is not recognized in an asset acquisition and any excess consideration transferred over the fair value of the net assets acquired is allocated to the non-financial assets based on relative fair values.

The total purchase price was allocated to the acquired assets based on their relative fair values, as follows (in thousands):

License and acquired intangibles for AGAMREE® (vamorolone) (IPR&D)	$	81,513
Investment in Santhera(i)		13,465
Total purchase consideration	$	94,978

(i) The fair value of the investment in Santhera was determined based on the closing market price (CHF 8.25) of Santhera shares and the exchange rate (1.1537) of CHF to USD on the date the shares were transferred, July 19, 2023.

In accordance with FASB ASC 730-10-25, as AGAMREE® (vamorolone) had not achieved regulatory approval when acquired, the portion of the purchase price allocated to the IPR&D asset acquired (which includes all transaction costs related to the transactions with Santhera) was immediately expensed to research and development. Milestone payments made are either expensed as research and development or capitalized as a developed asset based on when regulatory approval is obtained. As the transaction is accounted for as an asset acquisition under U.S. GAAP, the Company will recognize all sales-based milestone and royalty payments in cost of sales as revenue from product sales is recognized.

Following the approval of the NDA for AGAMREE® on October 26, 2023, the Company became obligated to make a milestone payment of $36 million to Santhera. The $36 million payment was made during the fourth quarter of 2023. The Company capitalized the $36 million payment which is amortized using the straight-line method over the product’s estimated useful life of 10.5 years.

The strategic equity investment in Santhera is accounted for as an investment in equity securities, and is recognized as a non-current asset, as the Company does not intend on selling the shares within 12 months. Since Santhera shares have a readily determinable fair value, the investment will be measured quarterly at fair value with changes reported in earnings in other income, net in the accompanying consolidated statement of operations and comprehensive income.

e. AGREEMENTS FOR DRUG MANUFACTURING, DEVELOPMENT, PRECLINICAL AND CLINICAL STUDIES. The Company has entered into agreements with contract manufacturers for the manufacture of commercial drug and drug and study placebo for the Company’s trials and studies, with contract research organizations (CRO) to conduct and monitor the Company’s trials and studies and with various entities for laboratories and other testing related to the Company’s trials and studies. The contractual terms of the agreements vary, but most require certain advances as well as payments based on the achievement of milestones. Further, these agreements are cancellable at any time, but obligate the Company to reimburse the providers for any time or costs incurred through the date of termination.

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Income Taxes

3 Months Ended

Mar. 31, 2024

Income Tax Disclosure [Abstract]

Income Taxes

14. Income Taxes.

The Company’s effective income tax rate was 20.0% and 20.8% for the three months ended March 31, 2024 and 2023, respectively. Differences in the effective tax and the statutory federal income tax rate of 21% are driven by state income taxes and anticipated annual permanent differences offset by equity compensation deductions.

The Company had no uncertain tax positions as of March 31, 2024 and December 31, 2023.

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Stockholders' Equity

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

Stockholders' Equity

15. Stockholders’ Equity.

Preferred Stock

The Company has 5,000,000 shares of authorized preferred stock, $0.001 par value per share, at March 31, 2024 and December 31, 2023. No shares of preferred stock were outstanding at March 31, 2024 and December 31, 2023.

Common Stock

The Company has 200,000,000 shares of authorized common stock, par value $0.001 per share. At March 31, 2024 and December 31, 2023, 118,029,526 and 107,121,549 shares, respectively, of common stock were issued and outstanding. Each holder of common stock is entitled to one vote of each share of common stock held of record on all matters on which stockholders generally are entitled to vote.

Share Repurchases

In March 2021, the Company’s Board of Directors approved a share repurchase program that authorizes the repurchase of up to $40 million of the Company’s common stock, pursuant to a repurchase plan under Rule 10b-18 of the Securities Act. The share repurchase program commenced on March 22, 2021. No shares were repurchased during the three months ended March 31, 2024 and 2023.

2020 Shelf Registration Statement

On July 23, 2020, the Company filed a shelf registration statement with the SEC to sell up to $200 million of common stock, preferred stock, warrants to purchase common stock, debt securities and units consisting of one or more of such securities (the “2020 Shelf Registration Statement”). The 2020 Shelf Registration Statement (file no. 333-240052) was declared effective by the SEC on July 31, 2020. The Company’s 2020 Shelf Registration Statement expired on July 31, 2023.

2023 Shelf Registration Statement

On September 8, 2023, the Company filed a shelf registration statement with the SEC to sell up to $500 million of common stock, preferred stock, warrants to purchase common stock, debt securities and units consisting of one or more of such securities (the “2023 Shelf Registration Statement”). The 2023 Shelf Registration Statement (file no. 333-274427) became effective upon filing. On January 9, 2024, the Company completed a public offering of 10 million shares of its common stock, raising net proceeds of approximately $140.7 million under the Company’s 2023 Shelf Registration Statement.

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Stock Compensation

3 Months Ended

Mar. 31, 2024

Share-based Payment Arrangement [Abstract]

Stock Compensation

16. Stock Compensation.

For the three months ended March 31, 2024 and 2023, the Company recorded stock-based compensation expense as follows (in thousands):

	2024		2023
Research and development	$	509	$	339
Selling, general and administrative		7,739		2,553
Total stock-based compensation	$	8,248	$	2,892

Stock Options

As of March 31, 2024, there were outstanding stock options to purchase 14,241,187 shares of common stock, of which stock options to purchase 8,869,384 shares of common stock were exercisable as of March 31, 2024.

During the three months ended March 31, 2024 and 2023, the Company granted seven-year term options to purchase an aggregate of 793,495 and 340,500 shares, respectively, of the Company’s common stock to employees. The Company recorded stock-based compensation related to stock options totaling $5.4 million and $2.2 million, respectively, during the three months ended March 31, 2024 and 2023.

During the three months ended March 31, 2024 and 2023, options to purchase 664,432 shares and 547,957 shares, respectively, of the Company’s common stock were exercised, with proceeds of $1.5 million and $1.3 million respectively, to the Company.

As of March 31, 2024, there was approximately $36.4 million of unrecognized compensation expense related to non-vested stock option awards granted under the 2014 and 2018 Stock Incentive Plans. The cost is expected to be recognized over a weighted average period of approximately 3.1 years.

Restricted Stock Units

The Company granted 35,693 restricted stock units and no restricted stock units during the three months ended March 31, 2024 and 2023, respectively. During the three months ended March 31, 2024 and 2023, the Company recorded non-cash stock-based compensation expense related to restricted stock units totaling $2.9 million and $0.7 million, respectively.

As of March 31, 2024, there was approximately $7.8 million of unrecognized compensation expense related to non-vested restricted stock units granted under the 2018 Stock Incentive Plan. The cost is expected to be recognized over a weighted average period of approximately 3.1 years.

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Basis of Presentation and Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2024

Accounting Policies [Abstract]

INTERIM FINANCIAL STATEMENTS

a. INTERIM FINANCIAL STATEMENTS. The accompanying unaudited interim consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP), and pursuant to the rules and regulations of the Securities and Exchange Commission (SEC) for reporting of interim financial information. Pursuant to such rules and regulations, certain information and note disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been omitted. The consolidated balance sheet as of December 31, 2023 included in this Form 10-Q was derived from the audited financial statements and does not include all disclosures required by U.S. GAAP.

In the opinion of management, the accompanying unaudited interim consolidated financial statements of the Company contain all adjustments (consisting of only normal recurring adjustments) necessary to present fairly the financial position of the Company as of the dates and for the periods presented. Accordingly, these consolidated statements should be read in conjunction with the financial statements and notes thereto for the year ended December 31, 2023 included in the 2023 Annual Report on Form 10-K filed by the Company with the SEC. The results of operations for the three months ended March 31, 2024 are not necessarily indicative of the results to be expected for any future period or for the full 2024 fiscal year.

PRINCIPLES OF CONSOLIDATION

b. PRINCIPLES OF CONSOLIDATION. The consolidated financial statements include the Company’s accounts and those of its wholly-owned subsidiary, Catalyst Pharmaceuticals Ireland, Ltd. (Catalyst Ireland). All intercompany accounts and transactions have been eliminated in consolidation. Catalyst Ireland was organized in 2017.

USE OF ESTIMATES

c. USE OF ESTIMATES. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.

CASH AND CASH EQUIVALENTS

d. CASH AND CASH EQUIVALENTS. The Company primarily invests in high credit-quality instruments in order to obtain higher yields on its cash equivalents. The Company considers all highly liquid instruments, purchased with an original maturity of three months or less, to be cash equivalents. Cash equivalents consist mainly of money market funds and U.S. Treasuries. The Company has substantially all its cash and cash equivalents deposited in money market accounts with one financial institution. These amounts exceed federally insured limits. 

INVESTMENTS

e. INVESTMENTS. At March 31, 2024 investments consisted of an investment in equity securities. At December 31, 2023, investments consisted of U.S. Treasuries and an investment in equity securities. Such investments are not insured by the Federal Deposit Insurance Corporation.

There were no U.S. Treasuries held at March 31, 2024 and U.S. Treasuries held at December 31, 2023 were classified as available-for-sale securities. The Company classifies U.S. Treasuries with stated maturities of greater than three months and less than one year in short-term investments. U.S. Treasuries with stated maturities greater than one year are classified as non-current investments in its consolidated balance sheets.

The Company records available-for-sale securities at fair value with unrealized gains and losses reported in accumulated other comprehensive income (in stockholders’ equity). Realized gains and losses are included in other income, net in the consolidated statements of operations and comprehensive income and are derived using the specific identification method for determining the cost of securities sold. Interest income is recognized when earned and is included in other income, net in the consolidated statements of operations and comprehensive income. The Company recognizes a charge when the declines in the fair value below the amortized cost basis of its available-for-sale securities are judged to be as a result of a credit loss. The Company considers various factors in determining whether to recognize an allowance for credit losses including whether the Company intends to sell the security or whether it is more likely than not that the Company would be required to sell the security before recovery of the amortized cost basis. If the unrealized loss of an available-for-sale debt security is determined to be a result of a credit loss the Company would recognize an allowance and the corresponding credit loss would be included in the consolidated statements of operations and comprehensive income. The Company has not recorded an allowance for credit loss on its available-for-sale securities. See Note 3 (Investments).

In July 2023, the Company made a strategic equity investment into Santhera by acquiring 1,414,688 of Santhera’s post reverse-split ordinary shares (representing approximately 11.26% of Santhera’s outstanding ordinary shares following the transaction). The investment is denominated in Swiss Francs. The Company has determined that it does not have significant influence over the operations of Santhera and accordingly the investment in Santhera’s ordinary shares is recorded under ASC 321, Equity Securities, with changes in fair value, inclusive of changes resulting from movements in foreign exchange rates, in other income, net in the consolidated statement of operations and comprehensive income.

ACCOUNTS RECEIVABLE, NET

f. ACCOUNTS RECEIVABLE, NET. Accounts receivable are recorded net of customer allowance for distribution fees, trade discounts, prompt payment discounts, chargebacks and expected credit losses. Allowances for distribution fees, trade discounts, prompt payment discounts and chargebacks are based on contractual terms. The Company estimates the allowance for expected credit losses based on existing contractual payment terms, actual payment patterns of its customers, current and future economic and market conditions and individual customer circumstances. The Company has not historically experienced any significant credit losses. All customer accounts are actively managed. At March 31, 2024 and December 31, 2023, the Company determined that an allowance for expected credit losses was not required. No accounts were written off during the periods presented.

INVENTORY

g. INVENTORY. Inventories are stated at the lower of cost or net realizable value. Inventories consist of raw materials, work-in-process and finished goods. Costs to be capitalized as inventories primarily include third-party manufacturing costs and other overhead costs. Cost is determined using a standard cost method, which approximates actual cost, and assumes a first-in, first out (FIFO) flow of goods. If information becomes available that suggests that inventories may not be realizable, the Company may be required to expense a portion or all of the previously capitalized inventories.

Products that have been approved by the FDA or other regulatory authorities, such as FIRDAPSE®, FYCOMPA® and AGAMREE® are also used in clinical programs to assess the safety and efficacy of the products for usage in treating diseases that have not been approved by the FDA or other regulatory authorities. The forms of FIRDAPSE®, FYCOMPA® and AGAMREE® utilized for both commercial and clinical programs are identical and, as a result, the inventories have an “alternative future use” as defined in authoritative guidance. Raw materials associated with clinical development programs are included in inventory and charged to research and development expense when the product enters the research and development process and no longer can be used for commercial purposes and, therefore, does not have an “alternative future use”.

The Company evaluates for potential excess inventory by analyzing current and future product demand relative to the remaining product shelf life. The Company builds demand forecasts by considering factors such as, but not limited to, overall market potential, market share, market acceptance, and patient usage.

PREPAID EXPENSES AND OTHER CURRENT ASSETS

h. PREPAID EXPENSES AND OTHER CURRENT ASSETS. Prepaid expenses and other current assets consist primarily of prepaid manufacturing, prepaid tax, prepaid insurance, prepaid subscription fees, prepaid research fees, prepaid commercialization expenses, prepaid co-pay assistance program, amounts due from collaborative and license arrangements and prepaid conference and travel expenses. Prepaid research fees consist of advances for the Company’s product development activities, including contracts for pre-clinical studies, clinical trials and studies, regulatory affairs and consulting. Prepaid manufacturing consists of advances for the Company’s drug manufacturing activities. Such advances are recorded as expense as the related goods are received or the related services are performed.

PROPERTY AND EQUIPMENT, NET

i. PROPERTY AND EQUIPMENT, NET. Property and equipment are recorded at cost less accumulated depreciation. Depreciation is calculated to amortize the depreciable assets over their useful lives using the straight-line method and commences when the asset is placed in service. Leasehold improvements are amortized on a straight-line basis over the term of the lease or the estimated life of the improvement, whichever is shorter. Useful lives generally range from three to five years for computer equipment and software, from five to seven years for furniture and equipment, and from five to ten years for leasehold improvements. Expenditures for repairs and maintenance are charged to expenses as incurred.

BUSINESS COMBINATIONS AND ASSET ACQUISITIONS

j. BUSINESS COMBINATIONS AND ASSET ACQUISITIONS. The Company evaluates acquisitions of assets and other similar transactions to assess whether or not the transaction should be accounted for as a business combination or asset acquisition by first applying a screen test to determine if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets. If the screen test is met, the transaction is accounted for as an asset acquisition. If the screen test is not met, further determination is required as to whether or not the Company has acquired inputs and processes that have the ability to create outputs which would meet the requirements of a business. If determined to be an asset acquisition, the Company accounts for the transaction under ASC 805-50, which requires the acquiring entity in an asset acquisition to recognize assets acquired and liabilities assumed based on the cost to the acquiring entity on a relative fair value basis, which includes transaction costs in addition to consideration given. Goodwill is not recognized in an asset acquisition and any excess consideration transferred over the fair value of the net assets acquired is allocated to the identifiable assets based on relative fair values. Contingent consideration payments in asset acquisitions are recognized when the contingency is resolved and the consideration is paid or becomes payable.

See Notes 12 (Commitments and Contingencies) and 13 (Agreements) for further discussion on the Company’s exclusive license agreement with Jacobus Pharmaceutical Company, Inc. (Jacobus), for the rights to develop and commercialize RUZURGI® in the U.S. and Mexico, which the Company accounted for as an asset acquisition under ASC 805-50. See Note 13 (Agreements) for further discussion on the Company’s acquisitions of the U.S. rights to FYCOMPA® from Eisai Co., Ltd, and on the exclusive license for North America acquired from Santhera for AGAMREE®, both of which the Company accounted for as asset acquisitions under ASC 805-50.

INTANGIBLE ASSETS, NET

k. INTANGIBLE ASSETS, NET. Identifiable intangible assets with a finite life are comprised of licensed rights and other acquired intangible assets and are amortized on a straight-line basis over the respective estimated useful life.

The Company reviews intangible assets with finite lives for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. If indicators of impairment exist, an impairment test is performed to assess the recoverability of the affected assets by determining whether the carrying amount of such assets exceeds the undiscounted expected future cash flows. If the affected assets are deemed not recoverable, the Company would estimate the fair value of the assets and record an impairment loss.

FAIR VALUE OF FINANCIAL INSTRUMENTS

l. FAIR VALUE OF FINANCIAL INSTRUMENTS. The Company’s financial instruments consist of cash and cash equivalents, investments, accounts receivable, accounts payable, and accrued expenses and other liabilities. At March 31, 2024 and December 31, 2023, the fair value of these instruments approximated their carrying value.

FAIR VALUE MEASUREMENTS

m. FAIR VALUE MEASUREMENTS. Current Financial Accounting Standards Board (FASB) fair value guidance emphasizes that fair value is a market-based measurement, not an entity-specific measurement. Therefore, a fair value measurement should be determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair value measurements, current FASB guidance establishes a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions that it believes market participants would use in pricing assets or liabilities (unobservable inputs classified within Level 3 of the hierarchy).

Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability, which are typically based on an entity’s own assumptions, as there is little, if any, related market activity.

In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.

	Fair Value Measurements at Reporting Date Using (in thousands)
	Balances as of March 31, 2024		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and cash equivalents:
Money market funds	$	280,802	$	280,802	$	—	$	—
Investment in equity securities:
Equity securities	$	15,345	$	15,345	$	—	$	—

	Fair Value Measurements at Reporting Date Using (in thousands)
	Balances as of December 31, 2023		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and cash equivalents:
Money market funds	$	18,256	$	18,256	$	—	$	—
U.S. Treasuries	$	94,523	$	94,523	$	—	$	—
Investment in equity securities:
Equity securities	$	16,489	$	16,489	$	—	$	—

OPERATING LEASES

n. OPERATING LEASES. The Company determines if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (ROU) assets, other current liabilities, and operating lease liabilities on its consolidated balance sheets. Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. As the Company’s lease does not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at commencement date in determining the present value of future payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives and initial direct costs incurred. The Company’s lease term includes options to extend or terminate the lease, however, these options are not considered in the lease term as the Company is not reasonably certain that it will exercise these options. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term. The Company has a lease agreement with lease and non-lease components, which are accounted for separately.

SHARE REPURCHASES

o. SHARE REPURCHASES. In March 2021, the Company’s Board of Directors approved a share repurchase program that authorizes the repurchase of up to $40 million of the Company’s common stock.

The Company accounts for share repurchases by charging the excess of the repurchase price over the repurchased common stock’s par value entirely to retained earnings. All repurchased shares are retired and become authorized but unissued shares. The Company accrues for the shares purchased under the share repurchase plan based on the trade date. The Company may terminate or modify its share repurchase program at any time.

REVENUE RECOGNITION

p. REVENUE RECOGNITION.

Product Revenues:

To determine revenue recognition for arrangements that are within the scope of Accounting Standards Codification (ASC) Topic 606 – Revenue from Contracts with Customers (Topic 606), the Company 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, (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. The Company assesses the goods or services promised within each contract and determines those that are performance obligations by assessing whether each promised good or service is distinct. The Company then recognizes as revenue the amount of the transaction price that is allocated to the respective performance obligation when (or as) the performance obligation is satisfied. For a complete discussion of accounting for product revenue, see Product Revenue, Net below.

The Company also may generate revenues from payments received under collaborative and license agreements. Collaborative and license agreement payments may include nonrefundable fees at the inception of the agreements, contingent payments for specific achievements designated in the agreements, and/or net profit-sharing payments on sales of products resulting from the collaborative and license arrangements. For a complete discussion of accounting for collaborative and licensing arrangements, see Revenues from Collaboration and Licensing Arrangements below.

The Company recognizes revenue when its customers obtain title of the promised goods, in an amount that reflects the consideration to which the Company expects to be entitled in exchange for these goods. For FIRDAPSE® and AGAMREE®, subsequent to receiving FDA approvals, the Company entered into an arrangement with one distributor (the Customer), which is the exclusive distributor of FIRDAPSE® and AGAMREE® in the U.S. The Customer subsequently resells FIRDAPSE® and AGAMREE® to a small group of exclusive specialty pharmacies (SPs) whose dispensing activities for patients with specific payors may result in government-mandated or privately negotiated rebate obligations for the Company with respect to the purchase of FIRDAPSE® and AGAMREE®.

During 2023, the Company sold FYCOMPA®, through a Transition Service Agreement with Eisai to major wholesalers, specialty pharmaceutical distributors, managed care organizations, and government agencies. The transition services under the Transition Services Agreement ended on December 31, 2023, and beginning on January 1, 2024, the Company commenced sales of FYCOMPA® in the U.S. commercial market to major wholesalers, specialty pharmaceutical distributors, managed care organizations, and government agencies.

Product Revenue, Net: The Company recognizes revenue on product sales when its’ customers obtain control of the Company’s products, which occur at a point in time (upon delivery or upon dispense to patient). Product revenue is recorded net of applicable reserves for variable consideration, including discounts and allowances. The Company’s payment terms range between 15 and 60 days.

Shipping and handling costs for product shipments occur prior to the customer obtaining control of the goods and are recorded in cost of sales.

If taxes should be collected from the Customer relating to product sales and remitted to governmental authorities, they will be excluded from revenue. The Company expenses incremental costs of obtaining a contract when incurred if the expected amortization period of the asset that the Company would have recognized is one year or less. However, no such costs were incurred during the three months ended March 31, 2024 and 2023.

During the three months ended March 31, 2024 and 2023, substantially all of the Company’s product revenues were from sales to customers in the U.S.

The following table summarizes the Company’s net product revenue disaggregated by product (in thousands):

	For the Three Months Ended March 31,
	2024		2023
FIRDAPSE®	$	66,842	$	57,526
FYCOMPA®		30,425		27,778
AGAMREE®		1,174		—
Total product revenue, net	$	98,441	$	85,304

Reserves for Variable Consideration: Revenue from product sales is recorded at the net sales price (transaction price), which includes estimates of variable consideration for which reserves are established. Components of variable consideration include trade discounts and allowances, prompt payment discounts, product returns, provider chargebacks and discounts, government rebates, and other incentives, such as voluntary patient assistance, and other allowances that are offered within contracts between the Company and its customers relating to the Company’s sale of its products. These reserves, as detailed below, are based on the amounts earned, or to be claimed on the related sales, and are classified as reductions of accounts receivable (if the amount is payable to its customers) or a current liability (if the amount is payable to a party other than its customers).

These estimates take into consideration a range of possible outcomes which are probability-weighted in accordance with the expected value method in Topic 606 for relevant factors such as current contractual and statutory requirements, specific known market events and trends, industry data, and forecasted customer buying and payment patterns. Overall, these reserves reflect the Company’s best estimates of the amount of consideration to which it is entitled based on the terms of the respective underlying contracts.

The amount of variable consideration which is included in the transaction price may be constrained and is included in the net sales price only to the extent that it is probable that a significant reversal in the amount of the cumulative revenue recognized under the contract will not occur in a future period. The Company’s analyses also contemplates application of the constraint in accordance with the guidance, under which it determined a material reversal of revenue would not occur in a future period for the estimates detailed below as of March 31, 2024 and, therefore, the transaction price was not reduced further during the three months ended March 31, 2024 and 2023. Actual amounts of consideration ultimately received may differ from the Company’s estimates. If actual results in the future vary from the Company’s estimates, the Company will adjust these estimates, which would affect net product revenue and earnings in the period such variances become known.

Trade Discounts, Allowances and Wholesaler Fees: The Company provides its customers with a discount that is explicitly stated in its contract and is recorded as a reduction of revenue in the period the related product revenue is recognized. To the extent the services received are distinct from the sale of products to its customers, these payments are classified in selling, general and administrative expenses in the Company’s consolidated statements of operations and comprehensive income. However, if the Company has determined such services received are not distinct from the Company’s sale of products to its customers, these payments have been recorded as a reduction of revenue within the consolidated statements of operations and comprehensive income through March 31, 2024 and 2023, as well as a reduction to accounts receivable, net on the consolidated balance sheets.

Prompt Payment Discounts: The Company provides its customers with prompt payment discounts which may result in adjustments to the price that is invoiced for the product transferred, in the case that payments are made within a defined period. The prompt payment discount reserve is based on actual invoice sales and contractual discount rates. Reserves for prompt payment discounts are included in accounts receivable, net on the consolidated balance sheets.

Funded Co-pay Assistance Program: The Company contracts with a third-party to manage the co-pay assistance program intended to provide financial assistance to qualified commercially-insured patients. The calculation of the accrual for co-pay assistance is based on an estimate of claims and the cost per claim that the Company expects to receive associated with its products, that have been recognized as revenue, but remains in the distribution channel at the end of each reporting period. These payments are considered payable to the third-party vendor and the related reserve is 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 in accrued expenses and other liabilities in the consolidated balance sheets.

Product Returns: Consistent with industry practice, the Company offers its customers limited product return rights for damaged and expiring product, provided it is within a specified period around the product expiration date as set forth in the applicable individual distribution or master agreement. The Company estimates the amount of its product sales that may be returned by its customers and records this estimate as a reduction of revenue in the period in which the related product revenue is recognized. The Company currently estimates product return liabilities using available industry data and its own sales information, including its visibility into the inventory remaining in the distribution channel. Return payments related to the sale of products are considered payable to the third-party vendor and the related reserve is 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 in accrued expenses and other liabilities in the consolidated balance sheets.

Provider Chargebacks and Discounts: Chargebacks for fees and discounts to providers represent the estimated obligations resulting from contractual commitments to sell products to qualified healthcare providers at prices lower than the list prices charged to the customer, who directly purchases the product from the Company. The customer charges the Company for the difference between what they paid for the product and the ultimate selling price to the qualified healthcare providers. The Company also participates in programs with government entities and other parties, including covered entities under the 340B Drug Pricing Program, whereby pricing on FYCOMPA® is extended below wholesaler list price to participating entities (the FYCOMPA® Participants). These entities purchase FYCOMPA® through wholesalers at the lower program price and the wholesalers then charge the Company the difference between their acquisition cost and the lower program price.

These reserves are established in the same period that the related revenue is recognized, resulting in a reduction of product revenue, net and accounts receivable, net. Chargeback amounts are generally determined at the time of resale to the qualified healthcare provider by the customer or at the time of a resale to a FYCOMPA® Participant by a wholesaler, and the Company generally issues credits for such amounts within a few weeks of the customer or wholesalers’ notification to the Company of the resale. Reserves for chargebacks consist primarily of chargebacks that the customer or wholesalers have claimed, but for which the Company has not yet issued a credit.

Government Rebates: The Company is subject to discount obligations under state Medicaid, Medicare and other government programs. These reserves are recorded in the same period the related revenue is recognized, resulting in a reduction of product revenue. For reserves related to the sale of its products, there is an establishment of a current liability, which is included in accrued expenses and other liabilities on the consolidated balance sheets. For Medicare, the Company also estimates the number of patients in the prescription drug coverage gap for whom the Company will owe an additional liability under the Medicare Part D program.

The Company’s 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 estimated future claims that will be made for product that has been recognized as revenue, but which remains in the distribution channel inventories at the end of each reporting period.

Payor Rebates: The Company contracts with certain private payor organizations, primarily insurance companies and pharmacy benefit managers, for the payment of rebates with respect to utilization of its products. The Company estimates these rebates and records such estimates in the same period the related revenue is recognized, resulting in a reduction of product revenue, net and the establishment of a current liability, which is included in accrued expenses and other liabilities on the consolidated balances sheets.

Bridge and Patient Assistance Programs: The Company provides FIRDAPSE® and AGAMREE® free of charge to uninsured patients who satisfy pre-established criteria for either the Bridge Program or the Patient Assistance Program. Patients who meet the Bridge Program eligibility criteria and are transitioning from investigational product while they are waiting for a coverage determination, or later, for patients whose access is threatened by the complications arising from a change of insurer may receive a temporary supply of free FIRDAPSE® or AGAMREE® while the Company is determining the patient’s third-party insurance, prescription drug benefit or other third-party coverage for FIRDAPSE® or AGAMREE®. The Patient Assistance Program provides FIRDAPSE® or AGAMREE® free of charge for longer periods of time for those who are uninsured or functionally uninsured with respect to FIRDAPSE® or AGAMREE® because they are unable to obtain coverage from their payor despite having health insurance, to the extent allowed by applicable law.

The Company provides FYCOMPA® free of charge to uninsured patients who satisfy pre-established criteria through a Patient Assistance Program. In addition, Catalyst provides programs to assist patients through the process for obtaining reimbursement approval for their FYCOMPA® prescriptions from their insurers. Catalyst also provides support for patients using FYCOMPA® through an Instant Savings Card Program.

The Company does not recognize any revenue related to these free products and the associated costs are classified in selling, general and administrative expenses in the Company’s consolidated statements of operations and comprehensive income.

Revenues from Collaboration and Licensing Arrangements:

The Company analyzes license and collaboration arrangements pursuant to FASB ASC Topic 808, Collaborative Arrangement Guidance and Consideration (Topic 808), to assess whether such arrangements, or transactions between arrangement participants, 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 or are more akin to a vendor-customer relationship. In making this evaluation, the Company considers whether the activities of the collaboration are considered to be distinct and deemed to be within the scope of the collaborative arrangement guidance or if they are more reflective of a vendor-customer relationship and, therefore, within the scope of Topic 606. This assessment is performed throughout the life of the arrangement based on changes in the responsibilities of all parties in the arrangement.

For elements of collaboration arrangements that are not accounted for pursuant to guidance in Topic 606, an appropriate recognition method is determined and applied consistently, generally by analogy to the revenue from contracts with customers guidance.

The Company evaluates the performance obligations promised in the contract that are based on goods and services that will be transferred to the customer and determines whether those obligations are both (i) capable of being distinct and (ii) distinct in the context of the contract. Goods or services that meet these criteria are considered distinct performance obligations. The Company estimates the transaction price based on the amount expected to be received for transferring the promised goods or services in the contract. The consideration may include fixed consideration or variable consideration.

The agreements provide for milestone payments upon achievement of development and regulatory events. The Company accounts for milestone payments as variable consideration in accordance with Topic 606. At the inception of each arrangement that includes variable consideration, the Company evaluates the amount of potential transaction price and the likelihood that the transaction price will be received. The Company utilizes either the most likely amount method or expected value method to estimate the amount expected to be received based on which method best predicts the amount expected to be received. The amount of variable consideration that is included in the transaction price may be constrained and is included in the transaction price only to the extent that it is probable that a significant reversal in the amount of the cumulative revenue recognized will not occur in a future period. Arrangements that include rights to additional goods or services that are exercisable at a customer’s discretion are generally considered options. The Company assesses if these options provide a material right to the customer and, if so, these options are considered performance obligations.

After contract inception, the transaction price is reassessed at every period end and updated for changes such as resolution of uncertain events. Any change in the overall transaction price is allocated to the performance obligations based on the same methodology used at contract inception.

The Company recognizes sales-based royalties or net profit-sharing when the latter of (a) the subsequent sale occurs, or (b) the performance obligation to which the sales-based royalty or net profit-sharing has been allocated has been satisfied.

Payments to and from the collaborator are presented in the statement of operations based on the nature of the Company’s business operations, the nature of the arrangement, including the contractual terms, and the nature of the payments.

Refer to Note 11 (Collaborative and Licensing Arrangements), for further discussion on the Company’s collaborative and licensing arrangements.

RESEARCH AND DEVELOPMENT

q. RESEARCH AND DEVELOPMENT. Costs incurred in connection with research and development activities are expensed as incurred. These costs consist of direct and indirect costs associated with specific projects, as well as fees paid to various entities that perform research-related services for the Company.

The Company records upfront and milestone payments made to third parties under licensing and collaboration arrangements that occur before a compound receives regulatory approval as acquired in-process research and development (IPR&D). IPR&D acquired as part of an asset acquisition with no alternative future use is expensed immediately to research and development. Milestone payments made after regulatory approval are capitalized as a developed asset and unless the asset is determined to have an indefinite life, the Company amortizes its definite-lived intangible assets using the straight-line method, which is considered the best estimate of economic benefit, over its estimated useful life.

ADVERTISING EXPENSE

r. ADVERTISING EXPENSE. Advertising costs are expensed as incurred. The Company incurred $3.9 million and $1.7 million in advertising costs during the three months ended March 31, 2024 and 2023, respectively, which are included in selling, general and administrative expenses in the Company’s consolidated statements of operations and comprehensive income.

STOCK-BASED COMPENSATION

s. STOCK-BASED COMPENSATION. The Company recognizes expense in the consolidated statements of operations and comprehensive income for the grant date fair value of all stock-based payments to employees, directors and consultants, including grants of stock options and other share-based awards. For stock options, the Company uses the Black-Scholes option valuation model, the single-option award approach, and the straight-line attribution method. Using this approach, compensation cost is amortized on a straight-line basis over the vesting period of each respective stock option, generally one to three years. Forfeitures are recognized as a reduction of stock-based compensation expense as they occur.

CONCENTRATION OF RISK

t. CONCENTRATION OF RISK. The financial instruments that potentially subject the Company to concentration of credit risk are cash equivalents, investments and accounts receivable, net. The Company places its cash and cash equivalents with high-credit quality financial institutions. These amounts at times may exceed federally insured limits. The Company has not experienced any credit losses in these accounts.

The Company sells its products, FIRDAPSE® and AGAMREE®, in the U.S. through an exclusive distributor (its Customer) to SPs. Therefore, its distributor and SPs account for principally all of its trade receivables and net product revenues related to this product. The Company sells its product, FYCOMPA® to major wholesalers, specialty pharmaceutical distributors, managed care organizations, and government agencies. The creditworthiness of its customers is continuously monitored, and the Company has internal policies regarding customer credit limits. The Company estimates an allowance for expected credit loss primarily based on the credit worthiness of its customers, historical payment patterns, aging of receivable balances and general economic conditions.

As of March 31, 2024, the Company had three FDA approved products, which makes it difficult to evaluate its current business, predict its future prospects, and forecast financial performance and growth. The Company had invested a significant portion of its efforts and financial resources in the development and commercialization of its lead product, FIRDAPSE®. The Company expects FIRDAPSE® and the recently acquired products FYCOMPA® and AGAMREE® to constitute virtually all of the Company’s product revenue for the foreseeable future.

The Company relies exclusively on third parties to formulate and manufacture its products and any future drug candidates. The commercialization of its products and any other drug candidates, if approved, could be stopped, delayed or made less profitable if those third parties fail to provide sufficient quantities of product or fail to do so at acceptable quality levels or prices. The Company does not intend to establish its own manufacturing facilities. The Company is using the same third-party contractors to manufacture, supply, store and distribute drug supplies for clinical trials and for the commercialization of FIRDAPSE®. The Company relies on the same third-party manufacturers for FYCOMPA® as utilized by Eisai prior to the Company’s acquisition in January 2023. It also relies on Santhera as its sole source of supply for AGAMREE®. If the Company is unable to continue its relationships with one or more of these third-party contractors, it could experience delays in the development or commercialization efforts as it locates and qualifies new manufacturers. The Company intends to rely on one or more third-party contractors to manufacture the commercial supply of its drugs.

The following table illustrates the approximate percentage of the Company’s total net product revenue attributed to the Company’s largest customers for the periods presented:

	For the Three Months Ended March 31,
	2024			2023
Customer A		69.1	%		67.4	%
Customer B*		—			32.6	%
Customer C		10.5	%		—
Customer D		10.1	%		—
Total		89.7	%		100.0	%

*During 2023, the Company sold FYCOMPA® through a Transition Service Agreement with Eisai. Effective January 1, 2024, FYCOMPA® is being sold and distributed through a 3PL organization.

ROYALTIES

u. ROYALTIES. Royalties incurred in connection with the Company’s license agreement for FIRDAPSE® and AGAMREE®, as disclosed in Note 13 (Agreements), are expensed to cost of sales as revenue from product sales is recognized.

Royalties incurred in connection with the Company’s license agreement for RUZURGI®, as disclosed in Note 13 (Agreements), are expensed to cost of sales as revenue from product sales is recognized for any royalties in excess of the minimum annual royalty payment from July 11, 2022 (the Effective Date) through 2025. The minimum royalty payment that exists annually for calendar years from the Effective Date through 2025 of $3 million are included in the purchase price of the agreement.

INCOME TAXES

v. INCOME TAXES. The Company utilizes the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on differences between the financial reporting and tax basis of assets and liabilities and are measured using enacted tax rates and laws that will be in effect when the differences are expected to reverse. A valuation allowance is provided when it is more likely than not that some portion or all of a deferred tax asset will not be realized.

The Company recognizes the financial statement benefit of a tax position only after determining that the relevant tax authority would more likely than not sustain the position following an audit. For tax positions meeting the more-likely-than-not threshold, the amount recognized in the financial statements is the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement with the relevant tax authority. The Company is subject to income taxes in the U.S. federal jurisdiction and various state jurisdictions. Tax regulations within each jurisdiction are subject to the interpretation of the related tax laws and regulations and require significant judgment to apply. The Company is not subject to U.S. federal, state and local tax examinations by tax authorities for years before 2020. If the Company were to subsequently record an unrecognized tax benefit, associated penalties and tax related interest expense would be reported as a component of income tax expense.

COMPREHENSIVE INCOME

w. COMPREHENSIVE INCOME. U.S. GAAP requires that all components of comprehensive income be reported in the financial statements in the period in which they are recognized. Comprehensive income is net income, plus certain other items that are recorded directly into stockholders’ equity. The Company’s comprehensive income is shown on the consolidated statements of operations and comprehensive income for the three months ended March 31, 2024 and 2023, and is comprised of net unrealized gains (losses) on the Company’s available-for-sale securities.

NET INCOME PER COMMON SHARE

x. NET INCOME PER COMMON SHARE. Basic net income per share is computed by dividing net income for the period by the weighted average number of common shares outstanding during the period. With regard to common stock subject to vesting requirements, the calculation includes only the vested portion of such stock and units.

Diluted net income per common share is computed by dividing net income by the weighted average number of common shares outstanding, increased by the assumed conversion of other potentially dilutive securities during the period.

The following table reconciles basic and diluted weighted average common shares:

	For the Three Months Ended March 31,
	2024		2023
Basic weighted average common shares outstanding		116,806,117		105,561,229
Effect of dilutive securities		6,597,509		8,424,900
Diluted weighted average common shares outstanding		123,403,626		113,986,129

Outstanding common stock equivalents totaling approximately 5.2 million and 1.3 million, were excluded from the calculation of diluted net income per common share for the three months ended March 31, 2024 and 2023, respectively, as their effect would be anti-dilutive.

SEGMENT INFORMATION

y. SEGMENT INFORMATION. Management has determined that the Company operates in one reportable segment, which is the development and commercialization of drug products.

RECLASSIFICATIONS

z. RECLASSIFICATIONS. Certain prior year amounts in the consolidated financial statements have been reclassified to conform to the current year presentation.

RECENTLY ISSUED ACCOUNTING STANDARDS

aa. RECENTLY ISSUED ACCOUNTING STANDARDS. The Company did not adopt any accounting standards during the quarter ended March 31, 2024.

In November 2023, the FASB issued ASU No. 2023-07, Improvements to Reportable Segment Disclosures (ASU 2023-07) which is intended to improve reportable segment disclosures primarily through enhanced disclosure of reportable segment expenses and requires that a public entity that has a single reportable segment provide all the disclosures required by ASU 2023-07 and all existing segment disclosures in Topic 280. The new guidance is required to be applied retrospectively to all prior periods presented in the financial statements and is effective for the Company for fiscal periods beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. The Company has one reportable segment and is evaluating the impact of the standard on the Company’s consolidated financial statements.

In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures which requires significant disclosures about income taxes, primarily focused on the disclosure of income taxes paid and the rate reconciliation table. The new guidance will be applied prospectively and is effective for the Company for fiscal periods beginning after December 15, 2024. The Company is evaluating the impact of the standard on the Company’s consolidated financial statements.

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Basis of Presentation and Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2024

Accounting Policies [Abstract]

Fair Value Measurement Specific to Assets or Liability

	Fair Value Measurements at Reporting Date Using (in thousands)
	Balances as of March 31, 2024		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and cash equivalents:
Money market funds	$	280,802	$	280,802	$	—	$	—
Investment in equity securities:
Equity securities	$	15,345	$	15,345	$	—	$	—

	Fair Value Measurements at Reporting Date Using (in thousands)
	Balances as of December 31, 2023		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and cash equivalents:
Money market funds	$	18,256	$	18,256	$	—	$	—
U.S. Treasuries	$	94,523	$	94,523	$	—	$	—
Investment in equity securities:
Equity securities	$	16,489	$	16,489	$	—	$	—

Summary of Disaggregated Product Revenue

The following table summarizes the Company’s net product revenue disaggregated by product (in thousands):

	For the Three Months Ended March 31,
	2024		2023
FIRDAPSE®	$	66,842	$	57,526
FYCOMPA®		30,425		27,778
AGAMREE®		1,174		—
Total product revenue, net	$	98,441	$	85,304

Summary of Percentage of the Company's Total Net Product Revenue

The following table illustrates the approximate percentage of the Company’s total net product revenue attributed to the Company’s largest customers for the periods presented:

	For the Three Months Ended March 31,
	2024			2023
Customer A		69.1	%		67.4	%
Customer B*		—			32.6	%
Customer C		10.5	%		—
Customer D		10.1	%		—
Total		89.7	%		100.0	%

*During 2023, the Company sold FYCOMPA® through a Transition Service Agreement with Eisai. Effective January 1, 2024, FYCOMPA® is being sold and distributed through a 3PL organization.

Basic and Dilutive Weighted Average Common Shares

The following table reconciles basic and diluted weighted average common shares:

	For the Three Months Ended March 31,
	2024		2023
Basic weighted average common shares outstanding		116,806,117		105,561,229
Effect of dilutive securities		6,597,509		8,424,900
Diluted weighted average common shares outstanding		123,403,626		113,986,129

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Investments (Tables)

3 Months Ended

Mar. 31, 2024

Investments, Debt and Equity Securities [Abstract]

Summary of Available-for-Sale Investments by Security type

Available-for-sale investments by security type were as follows (in thousands):

	Estimated Fair Value		Gross Unrealized Gains		Gross Unrealized Losses		Amortized Cost
At March 31, 2024:
U.S. Treasuries—Cash equivalents	$	—	$	—	$	—	$	—
Total	$	—	$	—	$	—	$	—
At December 31, 2023:
U.S. Treasuries—Cash equivalents	$	94,523	$	18	$	—	$	94,505
Total	$	94,523	$	18	$	—	$	94,505

Summary Of Net Gains And Losses On Equity Securities

	For the Three Months Ended March 31,
	2024			2023
Equity securities:
Net gains (losses) recognized during the period on equity securities	$	(1,144	)	$	—
Unrealized net gains (losses) recognized during the period on equity securities still held at the reporting date	$	(1,144	)	$	—

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Accumulated Other Comprehensive Income (Tables)

3 Months Ended

Mar. 31, 2024

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Summary of Reclassifications out of Accumulated Other Comprehensive Income

The following table summarizes the changes in accumulated other comprehensive income, net of tax from unrealized gains (losses) on available-for-sale securities (in thousands), the Company’s only component of accumulated other comprehensive income for the three months ended March 31, 2024 and 2023.

There were no reclassifications out of accumulated other comprehensive income during the three months ended March 31, 2024 or 2023.

	Total Accumulated Other Comprehensive Income
Balance at December 31, 2023	$	14
Other comprehensive gain (loss) before reclassifications		(14	)
Amount reclassified from accumulated other comprehensive income		—
Net current period other comprehensive gain (loss)		(14	)
Balance at March 31, 2024	$	—

	Total Accumulated Other Comprehensive Income
Balance at December 31, 2022	$	24
Other comprehensive gain (loss) before reclassifications		(13	)
Amount reclassified from accumulated other comprehensive income		—
Net current period other comprehensive gain (loss)		(13	)
Balance at March 31, 2023	$	11

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Inventory (Tables)

3 Months Ended

Mar. 31, 2024

Inventory Disclosure [Abstract]

Summary of current inventory

Inventory consists of the following (in thousands):

	March 31, 2024		December 31, 2023
Raw materials	$	5,926	$	1,910
Work-in-process		3,963		4,573
Finished goods		10,064		9,161
Total inventory	$	19,953	$	15,644

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Prepaid Expenses and Other Current Assets (Tables)

3 Months Ended

Mar. 31, 2024

Text Block [Abstract]

Prepaid expenses and other current assets

Prepaid expenses and other current assets consist of the following (in thousands):

	March 31, 2024		December 31, 2023
Prepaid manufacturing costs	$	2,005	$	2,005
Prepaid tax		307		1,238
Prepaid insurance		952		1,332
Prepaid subscriptions fees		1,937		1,299
Prepaid research fees		1,513		1,500
Prepaid commercialization expenses		2,951		3,038
Due from collaborative and licensing arrangements		143		138
Prepaid conference and travel expenses		844		771
Prepaid co-pay assistance program		1,561		863
Other		1,532		351
Total prepaid expenses and other current assets	$	13,745	$	12,535

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Operating Leases (Tables)

3 Months Ended

Mar. 31, 2024

Disclosure of Operating Leases [Abstract]

Lease, Cost

The components of lease expense were as follows (in thousands):

	For the Three Months Ended March 31,
	2024		2023
Operating lease cost	$	108	$	108

Schedule of Supplemental Cash Flow Information Related To Lease

Supplemental cash flow information related to lease was as follows (in thousands):

	For the Three Months Ended March 31,
	2024		2023
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows	$	129	$	125
Right-of-use assets obtained in exchange for lease obligations:
Operating lease	$	22	$	22

Schedule of Supplemental Balance Sheet related To Lease

Supplemental balance sheet information related to lease was as follows (in thousands):

	March 31, 2024		December 31, 2023
Operating lease right-of-use assets	$	2,440	$	2,508
Other current liabilities	$	377	$	369
Operating lease liabilities, net of current portion		3,091		3,188
Total operating lease liabilities	$	3,468	$	3,557

Lessee, Operating Lease, Liability, Maturity

Remaining payments of lease liabilities as of March 31, 2024 were as follows (in thousands):

2024 (remaining nine months)	$	394
2025		537
2026		553
2027		570
2028		587
Thereafter		1,440
Total lease payments		4,081
Less: imputed interest		(613	)
Total	$	3,468

Rent expense was approximately $0.1 million for each of the three-month periods ended March 31, 2024 and 2023.

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Property and Equipment, Net (Tables)

3 Months Ended

Mar. 31, 2024

Property, Plant and Equipment [Abstract]

Property and Equipment, net

Property and equipment, net consists of the following (in thousands):

	March 31, 2024			December 31, 2023
Furniture and equipment	$	692		$	494
Leasehold improvements		991			991
Software		433			433
Less: Accumulated depreciation		(808	)		(723	)
Total property and equipment, net	$	1,308		$	1,195

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License and Acquired Intangibles, Net (Tables)

3 Months Ended

Mar. 31, 2024

Finite-Lived Intangible Assets, Net [Abstract]

Schedule of Finite-Lived Intangible Assets

The following table presents the Company’s intangible assets at March 31, 2024 (in thousands):

	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Intangible assets:
License and acquired intangibles for RUZURGI®	$	33,569	$	3,998	$	29,571
License and acquired intangibles for FYCOMPA®		158,143		37,580		120,563
License and acquired intangibles for AGAMREE®		36,000		1,429		34,571
Total	$	227,712	$	43,007	$	184,705

The following table presents the Company’s intangible assets at December 31, 2023 (in thousands):

	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Intangible assets:
License and acquired intangibles for RUZURGI®	$	33,569	$	3,418	$	30,151
License and acquired intangibles for FYCOMPA®		158,143		29,673		128,470
License and acquired intangibles for AGAMREE®		36,000		572		35,428
Total	$	227,712	$	33,663	$	194,049

Schedule of Finite-Lived, Future Amortization Expense

The following table presents future amortization expense the Company expects for its intangible assets (in thousands):

2024 (remaining nine months)	$	28,034
2025		37,378
2026		37,378
2027		37,378
2028		7,705
Thereafter		36,832
Total	$	184,705

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Accrued Expenses and Other Liabilities (Tables)

3 Months Ended

Mar. 31, 2024

Payables and Accruals [Abstract]

Schedule of Accrued Expenses and Other Liabilities

Accrued expenses and other liabilities consist of the following (in thousands):

	March 31, 2024		December 31, 2023
Accrued preclinical and clinical trial expenses	$	527	$	1,015
Accrued professional fees		5,856		4,730
Accrued compensation and benefits		4,852		8,883
Accrued license fees		8,934		24,437
Accrued purchases		694		192
Operating lease liability		377		369
Accrued gross-to-net revenue liabilities*		24,885		6,877
Accrued income tax		7,340		729
Due to licensor		12,205		12,540
Accrued interest payable		1,204		1,031
Accrued charitable contributions		1,800		—
Other		631		465
Current accrued expenses and other liabilities		69,305		61,268
Lease liability – non-current		3,091		3,188
Due to licensor – non-current		1,859		2,497
Other – non-current		748		485
Non-current accrued expenses and other liabilities		5,698		6,170
Total accrued expenses and other liabilities	$	75,003	$	67,438

*During 2023, the Company sold FYCOMPA® through a Transition Service Agreement with Eisai. Effective January 1, 2024, FYCOMPA® is being sold and distributed through a 3PL organization.

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Agreements (Tables)

3 Months Ended

Mar. 31, 2024

Asset Acquisition [Line Items]

Schedule Of Total Purchase Price Was Allocated To The Acquired Assets Based On Their Relative Fair Values

License and acquired intangibles	$	33,569
Acquired research and development inventory expensed from asset acquisition		4,130
Total purchase price	$	37,699

Summary of Aggregate Amount Paid for the Assets Acquired

The following table summarizes the aggregate amount paid for the assets acquired by the Company in connection with the acquisition of FYCOMPA® (in thousands):

Base cash payment	$	160,000
Cash paid for pro-rated prepaid expenses		1,576
Reimbursement on base purchase price(i)		(3,238	)
Transaction costs(ii)		5,870
Total purchase consideration	$	164,208

(i) Recorded in prepaid expenses and other current assets in the accompanying consolidated balance sheet as of the acquisition date and reimbursement was fully applied as of June 30, 2023.

(ii) As of March 31, 2024, the full $5.9 million has been paid in cash.

Summary of Total Purchase Price Allocated to Acquired Assets

The total purchase price was allocated to the acquired assets based on their relative fair values, as follows (in thousands):

Inventory	$	4,100
Prepaid expenses and other current assets (samples)		130
Prepaid commercialization expenses		1,576
Property and equipment, net		433
License and acquired intangibles for FYCOMPA®		158,143
Accrued preclinical and clinical trial expenses		(174	)
Total purchase consideration	$	164,208

Vamorolone [Member]

Asset Acquisition [Line Items]

Summary of Aggregate Amount Paid for the Assets Acquired

The following table summarizes the aggregate amount paid for the assets acquired by the Company in connection with the acquisition of AGAMREE® and the strategic equity investment (in thousands):

Initial cash payment	$	75,000
Investment in Santhera		13,465
Transaction costs		6,513
Total purchase consideration	$	94,978

Summary of Total Purchase Price Allocated to Acquired Assets

The total purchase price was allocated to the acquired assets based on their relative fair values, as follows (in thousands):

License and acquired intangibles for AGAMREE® (vamorolone) (IPR&D)	$	81,513
Investment in Santhera(i)		13,465
Total purchase consideration	$	94,978

(i) The fair value of the investment in Santhera was determined based on the closing market price (CHF 8.25) of Santhera shares and the exchange rate (1.1537) of CHF to USD on the date the shares were transferred, July 19, 2023.

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Stock Compensation (Tables)

3 Months Ended

Mar. 31, 2024

Share-based Payment Arrangement [Abstract]

Stock-Based Compensation Expense

For the three months ended March 31, 2024 and 2023, the Company recorded stock-based compensation expense as follows (in thousands):

	2024		2023
Research and development	$	509	$	339
Selling, general and administrative		7,739		2,553
Total stock-based compensation	$	8,248	$	2,892

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Organization and Description of Business - Additional Information (Detail) - USD ($) $ in Thousands, shares in Millions		3 Months Ended
	Jan. 09, 2024	Mar. 31, 2024	Mar. 31, 2023
Proceeds from issuance of common stock		$ 141,000	$ 0
Public Offering [Member]
Stock issued during the period shares new issues	10
Proceeds from issuance of common stock	$ 140,700

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Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) $ in Thousands				1 Months Ended	3 Months Ended
	Jul. 11, 2025 USD ($)	Jul. 11, 2024 USD ($)	Jul. 11, 2023 USD ($)	Jul. 31, 2023 shares	Mar. 31, 2024 USD ($) Segment shares	Mar. 31, 2023 USD ($) shares	Dec. 31, 2023 USD ($)	Mar. 31, 2021 USD ($)
Summary Of Basis Of Presentation And Significant Accounting Policies [Line Items]
Maximum maturity period of cash and cash equivalent					three months
Maximum Amortization Period Of Compensation Cost On Straight Line Basis					3 years
Potential equivalent common stock excluded | shares					5,200,000	1,300,000
Number of operating segments | Segment					1
Asset acquisition equity interests issued or issuable number of shares issued | shares				1,414,688
Asset acquisition percentage of outstanding ordinary shares				11.26%
Debt securities, available-for-sale, current					$ 0		$ 0
Share Purchase Program [Member] | Common Stock [Member]
Summary Of Basis Of Presentation And Significant Accounting Policies [Line Items]
Share repurchase program, authorised								$ 40,000
License Agreement For RUZURGI [Member]
Summary Of Basis Of Presentation And Significant Accounting Policies [Line Items]
Minimum royalty	$ 3,000	$ 3,000	$ 3,000
Selling, General and Administrative Expenses [Member]
Summary Of Basis Of Presentation And Significant Accounting Policies [Line Items]
Advertising Expense					$ 3,900	$ 1,700
Minimum [Member] | Furniture and Equipment [Member]
Summary Of Basis Of Presentation And Significant Accounting Policies [Line Items]
Useful life of assets					5 years
Minimum [Member] | Computer Equipment [Member]
Summary Of Basis Of Presentation And Significant Accounting Policies [Line Items]
Useful life of assets					3 years
Minimum [Member] | Leasehold Improvements [Member]
Summary Of Basis Of Presentation And Significant Accounting Policies [Line Items]
Useful life of assets					5 years
Maximum [Member] | Furniture and Equipment [Member]
Summary Of Basis Of Presentation And Significant Accounting Policies [Line Items]
Useful life of assets					7 years
Maximum [Member] | Computer Equipment [Member]
Summary Of Basis Of Presentation And Significant Accounting Policies [Line Items]
Useful life of assets					5 years
Maximum [Member] | Leasehold Improvements [Member]
Summary Of Basis Of Presentation And Significant Accounting Policies [Line Items]
Useful life of assets					10 years

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Basis of Presentation and Significant Accounting Policies - Fair Value Measurement Specific to Assets or Liability (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	$ 15,345	$ 16,489
U.S. Treasuries [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents		94,523
Money market funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	280,802	18,256
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	15,345	16,489
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | U.S. Treasuries [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents		94,523
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Money market funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 280,802	$ 18,256

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Basis of Presentation and Significant Accounting Policies - Summary of Disaggregated Product Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 98,509	$ 85,366
FIRDAPSE [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	66,842	57,526
FYCOMPA [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	30,425	27,778
AGAMREE [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,174
Product revenue, net [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 98,441	$ 85,304

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Basis of Presentation and Significant Accounting Policies - Summary of Percentage of the Company's Total Net Product Revenue (Detail) - Revenue Benchmark [Member] - Customer Concentration Risk [Member]		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Customer A [Member]
Concentration Risk [Line Items]
Concentration risk, percentage		69.10%	67.40%
Customer B [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	[1]	0.00%	32.60%
Customer C [Member]
Concentration Risk [Line Items]
Concentration risk, percentage		10.50%	0.00%
Customer D [Member]
Concentration Risk [Line Items]
Concentration risk, percentage		10.10%	0.00%
Customer [Member]
Concentration Risk [Line Items]
Concentration risk, percentage		89.70%	100.00%

[1] During 2023, the Company sold FYCOMPA® through a Transition Service Agreement with Eisai. Effective January 1, 2024, FYCOMPA® is being sold and distributed through a 3PL organization.

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Basis of Presentation and Significant Accounting Policies - Schedule Of Reconcile Basic And Dilutive Weighted Average Common Shares (Detail) - shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Basic weighted average common shares outstanding	116,806,117	105,561,229
Effect of dilutive securities	6,597,509	8,424,900
Diluted weighted average common shares outstanding	123,403,626	113,986,129

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Investments - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Realized gains losses from available for sale securities	$ 0	$ 0

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Investments - Summary of Available-for-Sale Investments by Security type (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Net Investment Income [Line Items]
Estimated Fair Value	$ 0	$ 94,523
Gross Unrealized Gains	0	18
Gross Unrealized Losses	0	0
Amortized cost	0	94,505
U.S. Treasuries—Cash equivalents [Member]
Net Investment Income [Line Items]
Estimated Fair Value	0	94,523
Gross Unrealized Gains	0	18
Gross Unrealized Losses	0	0
Amortized cost	$ 0	$ 94,505

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Investments - Summary Of Net Gains And Losses On Equity Securities (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Net gains (losses) recognized during the period on equity securities	$ (1,144)	$ 0
Unrealized net gains (losses) recognized during the period on equity securities still held at the reporting date	$ (1,144)	$ 0

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Accumulated Other Comprehensive Income - Summary of Reclassifications out of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Incom [Line Items]
Beginning balance	$ 14	$ 24
Other comprehensive gain (loss) before reclassifications	(14)	(13)
Amount reclassified from accumulated other comprehensive income	0	0
Net current period other comprehensive gain (loss)	(14)	(13)
Ending balance	$ 0	$ 11

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Inventory - Summary of current inventory (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Inventory Disclosure [Abstract]
Raw materials	$ 5,926	$ 1,910
Work-in-process	3,963	4,573
Finished goods	10,064	9,161
Total inventory	$ 19,953	$ 15,644

XML

Prepaid Expenses and Other Current Assets - Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid manufacturing costs	$ 2,005	$ 2,005
Prepaid tax	307	1,238
Prepaid insurance	952	1,332
Prepaid subscriptions fees	1,937	1,299
Prepaid research fees	1,513	1,500
Prepaid commercialization expenses	2,951	3,038
Due from collaborative and licensing arrangements	143	138
Prepaid conference and travel expenses	844	771
Prepaid co-pay assistance program	1,561	863
Other	1,532	351
Total prepaid expenses and other current assets	$ 13,745	$ 12,535

XML

Operating Leases - Operating Leases (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disclosure of Operating Leases [Abstract]
Operating lease cost	$ 108	$ 108

XML

Operating Leases - Schedule of Supplemental Cash Flow Information Related To Lease (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows	$ 129	$ 125
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 22	$ 22

XML

Operating Leases - Schedule of Supplemental Balance Sheet related To Lease (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Disclosure of Operating Leases [Line Items]
Operating lease right-of-use assets	$ 2,440	$ 2,508
Other current liabilities	$ 377	$ 369
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Liabilities, Current	Liabilities, Current
Operating lease liabilities, net of current portion	$ 3,091	$ 3,188
Total operating lease liabilities	$ 3,468	$ 3,557

XML

Operating Leases - Lessee, Operating Lease, Liability, Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Disclosure of Operating Leases [Line Items]
2024 (remaining nine months)	$ 394
2025	537
2026	553
2027	570
2028	587
Thereafter	1,440
Total lease payments	4,081
Less: imputed interest	(613)
Total	$ 3,468	$ 3,557

XML

Operating Leases - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) ft²	Mar. 31, 2023 USD ($)	Dec. 31, 2023
Disclosure of Operating Leases [Line Items]
Finance Lease Obligations | $	$ 0
Lessee, Operating Lease, Option to Extend	5 years
Before agreement of company leased spaces | ft²	7,800
After agreement of company leased spaces | ft²	10,700
Weighted average remaining lease term	7 years 1 month 6 days		7 years 3 months 18 days
Weighted average discount rate	4.51%		4.51%
Rent expense | $	$ 108	$ 108
Maximum [Member]
Disclosure of Operating Leases [Line Items]
Lessee, Operating Lease, Option to Terminate	7.6 years
Minimum [Member]
Disclosure of Operating Leases [Line Items]
Lessee, Operating Lease, Option to Terminate	6 years

XML

Property and Equipment, Net - Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Less: Accumulated depreciation	$ (808)	$ (723)
Total property and equipment, net	1,308	1,195
Furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	692	494
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	991	991
Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 433	$ 433

XML

License and Acquired Intangibles, Net - Schedule of Finite Lived Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 227,712	$ 227,712
Accumulated Amortization	43,007	33,663
Net Carrying Value	184,705	194,049
License and Acquired Intangibles for RUZURGI [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	33,569	33,569
Accumulated Amortization	3,998	3,418
Net Carrying Value	29,571	30,151
License and Acquired Intangibles for FYCOMPA [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	158,143	158,143
Accumulated Amortization	37,580	29,673
Net Carrying Value	120,563	128,470
Licensed And Acquired Intangibles For AGAMREE [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	36,000	36,000
Accumulated Amortization	1,429	572
Net Carrying Value	$ 34,571	$ 35,428

XML

License and Acquired Intangibles, Net - Schedule of Finite-Lived, Future Amortization Expense (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
2024 (remaining nine months)	$ 28,034
2025	37,378
2026	37,378
2027	37,378
2028	7,705
Thereafter	36,832
Total	$ 184,705	$ 194,049

XML

License and Acquired Intangibles, Net - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 9,344	$ 6,531
Impairment charges recognized on definite-lived intangibles	$ 0	0
Finite-Lived Intangible Assets, Remaining Amortization Period	6 years 2 months 12 days		6 years 6 months
License and Acquired Intangibles for RUZURGI [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	14 years 6 months
Amortization of intangible assets	$ 600	600
License and Acquired Intangibles for FYCOMPA [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	5 years
Amortization of intangible assets	$ 7,900	6,000
Licensed And Acquired Intangibles For AGAMREE [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	10 years 6 months
Amortization of intangible assets	$ 900	$ 0

XML

Accrued Expenses and Other Liabilities - Schedule of Accrued Expenses and Other Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Payables and Accruals [Abstract]
Accrued preclinical and clinical trial expenses	$ 527	$ 1,015
Accrued professional fees	5,856	4,730
Accrued compensation and benefits	4,852	8,883
Accrued license fees	8,934	24,437
Accrued purchases	694	192
Operating lease liability	377	369
Accrued gross-to-net revenue liabilities	24,885	6,877
Accrued income tax	7,340	729
Due to licensor	12,205	12,540
Accrued interest payable	1,204	1,031
Accrued charitable contributions	1,800	0
Other	631	465
Current accrued expenses and other liabilities	69,305	61,268
Lease liability – non-current	3,091	3,188
Due to licensor – non-current	1,859	2,497
Other – non-current	748	485
Non-current accrued expenses and other liabilities	5,698	6,170
Total accrued expenses and other liabilities	$ 75,003	$ 67,438

XML

Collaborative and Licensing Arrangements - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
KYE Pharmaceuticals [Member] | Selling, General and Administrative Expenses [Member]
Collaborative Arrangements [Line Items]
Expenses incurred in connection with collaboration agreement	$ 0	$ 0
Collaborative Arrangement [Member] | Dydo Pharma Inc [Member]
Collaborative Arrangements [Line Items]
Revenues	$ 0	$ 200,000

XML

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions		1 Months Ended
	Jul. 11, 2022	Jan. 31, 2023	Jul. 11, 2024	Jul. 11, 2023
Commitments [Line Items]
Number of trading days from receipt of the notice letter		45 days
License and asset purchase agreement payment made in first year	$ 10.0			$ 10.0
Subsequent Event [Member]
Commitments [Line Items]
License and asset purchase agreement payment made in first year			$ 10.0
License and Asset Purchase Agreement [Member]
Commitments [Line Items]
Purchase price of an asset acquisition	$ 30.0
Percentage of the consideration paid by a third party to acquire that voucher	50.00%
License and Asset Purchase Agreement [Member] | Calendar Years 2022 Through 2025 [Member]
Commitments [Line Items]
Percentage of annual royalty on the Company's net sales	1.50%
Minimum royalty amount	$ 3.0
License and Asset Purchase Agreement [Member] | Calendar Year 2026 [Member]
Commitments [Line Items]
Percentage of annual royalty on the Company's net sales	2.50%
Minimum royalty amount	$ 5.0

XML

Agreements - Additional Information (Detail) $ in Thousands						1 Months Ended		3 Months Ended
	Jul. 11, 2025 USD ($)	Jul. 11, 2024 USD ($)	Jul. 19, 2023 SFr / shares	Jul. 11, 2023 USD ($)	Jul. 11, 2022 USD ($)	Jul. 31, 2023 USD ($) shares	Jul. 31, 2023 SFr / shares	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Mar. 31, 2023 USD ($)	Oct. 26, 2023 USD ($)
License Agreement [Line Items]
Percentage of royalty on net sales								3.50%
Research and development expenses								$ 2,581		$ 3,562
Asset acquisition equity interests issued or issuable number of shares issued | shares						1,414,688
Asset Acquisition Percentage Of Outstanding Ordinary Shares						11.26%
U.S. Rights for FYCOMPA [Member]
License Agreement [Line Items]
Date on which strategic collaboration is entered into								Jan. 24, 2023
Payments to acquire productive assets								$ 164,200
Contingent consideration liability								$ 25,000
U.S. Rights for FYCOMPA [Member] | Royalty More Than Ten Million And Less Than Hundred Million [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								6.00%
U.S. Rights for FYCOMPA [Member] | Royalty More Than Ten Million And Less Than Hundred Million [Member] | Royalty Agreement Terms [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								12.00%
U.S. Rights for FYCOMPA [Member] | Royalty More Than Hundred And Twenty Five Million [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								11.00%
Net sales royalty threshold								$ 125,000
U.S. Rights for FYCOMPA [Member] | Royalty More Than Hundred And Twenty Five Million [Member] | Royalty Agreement Terms [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								22.00%
Net sales royalty threshold								$ 125,000
U.S. Rights for FYCOMPA [Member] | Royalty More Than Hundred Million And Less Than Hundred And Twenty Five Million [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								8.50%
U.S. Rights for FYCOMPA [Member] | Royalty More Than Hundred Million And Less Than Hundred And Twenty Five Million [Member] | Royalty Agreement Terms [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								17.00%
Vamorolone [Member]
License Agreement [Line Items]
Payments to acquire productive assets						$ 75,000
Asset acquisition equity interests issued or issuable number of shares issued | shares						1,414,688
Asset Acquisition Percentage Of Outstanding Ordinary Shares						11.26%
Asset Acquisition Investment Share Price | SFr / shares							SFr 9.477
Closing Market Price | SFr / shares			SFr 8.25
Foreign Currency Exchange Rate, Translation			1.1537
Collaborative arrangement, milestone payment obligation											$ 36,000
Payment on milestone payment									$ 36,000
Capitalized amortized Cost									$ 36,000
Finite-lived intangible asset, useful life								10 years 6 months
AGAMREE [Member] | Royalty Less Than Hundred Million [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								5.00%
AGAMREE [Member] | Royalty More Than Hundred Million And Less Than Two Hundred Million [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								7.00%
AGAMREE [Member] | Royalty More Than Two Hundred Million And Less Than Three Hundred Million [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								9.00%
AGAMREE [Member] | Royalty More Than Three Hundred Million [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								11.00%
AGAMREE [Member] | Royalty Less Than Two Hundred Fifty Million [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								7.00%
AGAMREE [Member] | Royalty More Two Hundred And Fifty Million And Less Than Five Hundred Million [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								8.50%
AGAMREE [Member] | Royalty More Than Five Hundred Million And Less Than Seven Hundred Fifty Million [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								10.00%
AGAMREE [Member] | Royalty More Seven Hundred And Fifty Million And Less Than One Billion [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								12.00%
AGAMREE [Member] | Royalty More Than One Billion And Less Than Two Billion [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								13.00%
AGAMREE [Member] | Royalty More Than Two Billion [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								15.00%
AGAMREE [Member] | Royalty For Santhera Sales Based Milestones [Member]
License Agreement [Line Items]
Net sales based milestone to royalty threshold								$ 105,000
AGAMREE [Member] | Royalty For Additional Indications And Milestones Of Up To Fifty Million More [Member]
License Agreement [Line Items]
Percentage of royalty payable to sales based milestone								11.00%
AGAMREE [Member] | Royalty For Additional Indications And Milestones [Member]
License Agreement [Line Items]
Contingent consideration liability								$ 50,000
Minimum [Member] | U.S. Rights for FYCOMPA [Member] | Royalty More Than Ten Million And Less Than Hundred Million [Member]
License Agreement [Line Items]
Net sales royalty threshold								10,000
Minimum [Member] | U.S. Rights for FYCOMPA [Member] | Royalty More Than Ten Million And Less Than Hundred Million [Member] | Royalty Agreement Terms [Member]
License Agreement [Line Items]
Net sales royalty threshold								10,000
Minimum [Member] | U.S. Rights for FYCOMPA [Member] | Royalty More Than Hundred Million And Less Than Hundred And Twenty Five Million [Member]
License Agreement [Line Items]
Net sales royalty threshold								100,000
Minimum [Member] | U.S. Rights for FYCOMPA [Member] | Royalty More Than Hundred Million And Less Than Hundred And Twenty Five Million [Member] | Royalty Agreement Terms [Member]
License Agreement [Line Items]
Net sales royalty threshold								100,000
Minimum [Member] | AGAMREE [Member] | Royalty More Than Hundred Million And Less Than Two Hundred Million [Member]
License Agreement [Line Items]
Net sales royalty threshold								100,000
Minimum [Member] | AGAMREE [Member] | Royalty More Than Two Hundred Million And Less Than Three Hundred Million [Member]
License Agreement [Line Items]
Net sales royalty threshold								200,000
Minimum [Member] | AGAMREE [Member] | Royalty More Than Three Hundred Million [Member]
License Agreement [Line Items]
Net sales royalty threshold								300,000
Minimum [Member] | AGAMREE [Member] | Royalty Less Than Two Hundred Fifty Million [Member]
License Agreement [Line Items]
Net sales royalty threshold								250,000
Minimum [Member] | AGAMREE [Member] | Royalty More Two Hundred And Fifty Million And Less Than Five Hundred Million [Member]
License Agreement [Line Items]
Net sales royalty threshold								250,000
Minimum [Member] | AGAMREE [Member] | Royalty More Than Five Hundred Million And Less Than Seven Hundred Fifty Million [Member]
License Agreement [Line Items]
Net sales royalty threshold								500,000
Minimum [Member] | AGAMREE [Member] | Royalty More Seven Hundred And Fifty Million And Less Than One Billion [Member]
License Agreement [Line Items]
Net sales royalty threshold								750,000
Minimum [Member] | AGAMREE [Member] | Royalty More Than One Billion And Less Than Two Billion [Member]
License Agreement [Line Items]
Net sales royalty threshold								1,000,000
Minimum [Member] | AGAMREE [Member] | Royalty More Than Two Billion [Member]
License Agreement [Line Items]
Net sales royalty threshold								2,000,000
Maximum [Member] | U.S. Rights for FYCOMPA [Member] | Royalty More Than Ten Million And Less Than Hundred Million [Member]
License Agreement [Line Items]
Net sales royalty threshold								100,000
Maximum [Member] | U.S. Rights for FYCOMPA [Member] | Royalty More Than Ten Million And Less Than Hundred Million [Member] | Royalty Agreement Terms [Member]
License Agreement [Line Items]
Net sales royalty threshold								100,000
Maximum [Member] | U.S. Rights for FYCOMPA [Member] | Royalty More Than Hundred Million And Less Than Hundred And Twenty Five Million [Member]
License Agreement [Line Items]
Net sales royalty threshold								125,000
Maximum [Member] | U.S. Rights for FYCOMPA [Member] | Royalty More Than Hundred Million And Less Than Hundred And Twenty Five Million [Member] | Royalty Agreement Terms [Member]
License Agreement [Line Items]
Net sales royalty threshold								125,000
Maximum [Member] | AGAMREE [Member] | Royalty Less Than Hundred Million [Member]
License Agreement [Line Items]
Net sales royalty threshold								100,000
Maximum [Member] | AGAMREE [Member] | Royalty More Than Hundred Million And Less Than Two Hundred Million [Member]
License Agreement [Line Items]
Net sales royalty threshold								200,000
Maximum [Member] | AGAMREE [Member] | Royalty More Than Two Hundred Million And Less Than Three Hundred Million [Member]
License Agreement [Line Items]
Net sales royalty threshold								300,000
Maximum [Member] | AGAMREE [Member] | Royalty More Two Hundred And Fifty Million And Less Than Five Hundred Million [Member]
License Agreement [Line Items]
Net sales royalty threshold								500,000
Maximum [Member] | AGAMREE [Member] | Royalty More Than Five Hundred Million And Less Than Seven Hundred Fifty Million [Member]
License Agreement [Line Items]
Net sales royalty threshold								750,000
Maximum [Member] | AGAMREE [Member] | Royalty More Seven Hundred And Fifty Million And Less Than One Billion [Member]
License Agreement [Line Items]
Net sales royalty threshold								1,000,000
Maximum [Member] | AGAMREE [Member] | Royalty More Than One Billion And Less Than Two Billion [Member]
License Agreement [Line Items]
Net sales royalty threshold								$ 2,000,000
License Agreement with BioMarin [Member]
License Agreement [Line Items]
Date on which strategic collaboration is entered into								Oct. 26, 2012
Royalty agreement period								7 years
Net sales royalty threshold								$ 100,000
License Agreement with BioMarin [Member] | Minimum [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								7.00%
License Agreement with BioMarin [Member] | Maximum [Member]
License Agreement [Line Items]
Percentage of royalty on net sales								10.00%
License Agreement For RUZURGI [Member]
License Agreement [Line Items]
Date on which strategic collaboration is entered into								Jul. 11, 2022
Minimum royalty	$ 3,000	$ 3,000		$ 3,000
Research and development expenses					$ 4,100
Up front payment					$ 10,000
Asset acquisition purchase price consideration		$ 10,000		$ 10,000
License Agreement For RUZURGI [Member] | Minimum [Member]
License Agreement [Line Items]
Percentage of minimum royalty payable to net sales								1.25%
License Agreement For RUZURGI [Member] | Maximum [Member]
License Agreement [Line Items]
Percentage of maximum royalty payable to net sales								2.50%

XML

Agreements - Schedule Of Total Purchase Price Was Allocated To The Acquired Assets Based On Their Relative Fair Values (Detail) - License Agreement For RUZURGI [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Schedule Of Total Purchase Price Was Allocated To The Acquired Assets Based On Their Relative Fair Values [Line Items]
License and acquired intangibles	$ 33,569
Acquired research and development inventory expensed from asset acquisition	4,130
Total purchase price	$ 37,699

XML

Agreements - Summary of Aggregate Amount Paid for the Assets Acquired (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Asset Acquisition [Line Items]
Total purchase consideration	$ 94,978
U.S. Rights for FYCOMPA [Member]
Asset Acquisition [Line Items]
Base cash payment	160,000
Cash paid for pro-rated prepaid expenses	1,576
Reimbursement on base purchase price	(3,238)	[1]
Transaction costs	5,870	[2]
Total purchase consideration	$ 164,208

[1] Recorded in prepaid expenses and other current assets in the accompanying consolidated balance sheet as of the acquisition date and reimbursement was fully applied as of June 30, 2023.

[2] As of March 31, 2024, the full $5.9 million has been paid in cash.

XML

Agreements - Summary of Aggregate Amount Paid for the Assets Acquired (Parenthetical) (Detail) - U.S. Rights for FYCOMPA [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Asset Acquisition [Line Items]
Transaction expenses	$ 5,870	[1]
Cash [Member]
Asset Acquisition [Line Items]
Transaction expenses	$ 5,900

[1] As of March 31, 2024, the full $5.9 million has been paid in cash.

XML

Agreements - Summary of Total Purchase Price Allocated to Acquired Assets (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Asset Acquisition [Line Items]
Total purchase consideration	$ 94,978
U.S. Rights for FYCOMPA [Member]
Asset Acquisition [Line Items]
Inventory	4,100
Prepaid expenses and other current assets (samples)	130
Prepaid commercialization expenses	1,576
Property and equipment, net	433
License and acquired intangibles for FYCOMPA®	158,143
Accrued preclinical and clinical trial expenses	(174)
Total purchase consideration	$ 164,208

XML

Agreements - Summary of aggregate amount paid for the assets (Detail) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended
		Jul. 31, 2023	Mar. 31, 2024
Asset Acquisition [Line Items]
Investment in Santhera	[1]		$ 13,465
Total purchase consideration			$ 94,978
Vamorolone [Member]
Asset Acquisition [Line Items]
Initial cash payment		$ 75,000
Investment in Santhera		13,465
Transaction costs		6,513
Total purchase consideration		$ 94,978

[1] The fair value of the investment in Santhera was determined based on the closing market price (CHF 8.25) of Santhera shares and the exchange rate (1.1537) of CHF to USD on the date the shares were transferred, July 19, 2023.

XML

Agreements - Summary of total purchase price allocated (Detail) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended
		Jul. 31, 2023	Mar. 31, 2024
Asset Acquisition [Line Items]
Investment in Santhera	[1]		$ 13,465
Total purchase consideration			94,978
Vamorolone [Member]
Asset Acquisition [Line Items]
License and acquired intangibles for vamorolone (IPR&D)			$ 81,513
Investment in Santhera		$ 13,465
Total purchase consideration		$ 94,978

[1] The fair value of the investment in Santhera was determined based on the closing market price (CHF 8.25) of Santhera shares and the exchange rate (1.1537) of CHF to USD on the date the shares were transferred, July 19, 2023.

XML

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Income Tax Disclosure [Line Items]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 0		$ 0
Effective Income Tax Rate Reconciliation, Percent	20.00%	20.80%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%

XML

Stockholders' Equity (Preferred Stock and Common Stock) - Additional Information (Detail)	Mar. 31, 2024 Vote $ / shares shares	Dec. 31, 2023 $ / shares shares
Stockholders Equity [Line Items]
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, par value | $ / shares	$ 0.001	$ 0.001
Preferred stock, shares outstanding	0	0
Common stock, shares authorized	200,000,000	200,000,000
Common stock, par value | $ / shares	$ 0.001	$ 0.001
Common stock, shares issued	118,029,526	107,121,549
Common stock, shares outstanding	118,029,526	107,121,549
Number of votes entitled for each share of common stock | Vote	1

XML

Stockholders' Equity ( Share Repurchases ) - Additional Information (Detail) - Common Stock [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2021
Stockholders Equity [Line Items]
Aggregate share repurchased	0	0
Share Purchase Program [Member]
Stockholders Equity [Line Items]
Share repurchase program, authorised			$ 40

XML

Stockholders' Equity (2020 Shelf Registration Statement) - Additional Information (Detail) $ in Millions	Jul. 23, 2020 USD ($)
2020 Shelf Registration Statement [Member]
Stockholders' Equity [Line Items]
Maximum dollar amount of common stock to be issued under shelf registration statement	$ 200

XML

Stockholders' Equity (2023 Shelf Registration Statement) - Additional Information (Detail) - USD ($)		3 Months Ended
	Jan. 09, 2024	Mar. 31, 2024	Mar. 31, 2023	Sep. 08, 2023
Stockholders' Equity [Line Items]
Gross proceeds from issuance of common stock		$ 141,000,000	$ 0
2023 Shelf Registration Statement [Member]
Stockholders' Equity [Line Items]
Maximum dollar amount of common stock to be issued under shelf registration statement				$ 500,000,000
Stock issued during the period shares new issues	10,000,000
Gross proceeds from issuance of common stock	$ 140,700,000

XML

Stock Compensation - Stock-Based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	$ 8,248	$ 2,892
Research and Development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	509	339
Selling, General and Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	$ 7,739	$ 2,553

XML

Stock Compensation - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from exercise of stock options	$ 1,522	$ 1,270
Number of options, Outstanding	14,241,187
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to non-vested stock compensation awards granted under the Plan	$ 7,800
Expected remaining weighted average vesting period	3 years 1 month 6 days
Non-cash stock-based compensation expense	$ 2,900	$ 700
Common stock granted	35,693	0
Options to Purchase Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options exercised	664,432	547,957
Proceeds from exercise of stock options	$ 1,500	$ 1,300
Stock option granted, contractual term	7 years	7 years
Common stock unit granted	793,495	340,500
Unrecognized compensation expense related to non-vested stock compensation awards granted under the Plan	$ 36,400
Expected remaining weighted average vesting period	3 years 1 month 6 days
Non-cash stock-based compensation expense	$ 5,400	$ 2,200
Stock options to purchase shares of common stock	8,869,384