Exhibit 99.1

Catalyst Pharmaceuticals Reports Strong Second Quarter 2024 Financial Results and Provides Corporate Update

Delivered Robust Revenue Performance, Fueled by Exceptional Commercial Execution and Early Success of the U.S. AGAMREE^® Product Launch

Reported Record Q2 2024 Total Revenues of $122.7 Million, Representing a 23.2% YoY Increase

FIRDAPSE^® Q2 2024 Net Product Revenues of $77.4 Million, Reflecting Strong Organic 19.2% YoY Growth

AGAMREE^® Q2 2024 Net Product Revenues of $8.7 Million Demonstrates a Strong Start to U.S. Commercialization

FYCOMPA^® Q2 2024 Net Product Revenues of $36.5 Million, Representing a 5.7% YoY Increase

Q2 2024 GAAP Net Income of $40.8 Million, $0.33 Per Share Diluted

Q2 2024 Non-GAAP Net Income of $69.6 Million, $0.56 Per Share Diluted

Reaffirming 2024 Total Revenue Guidance of $455 Million – $475 Million, Expecting Results in the Upper

Range of the Guidance

Conference Call and Webcast to be Held on August 8, 2024, at 8:30 AM ET

CORAL GABLES, Fla., August 7, 2024- Catalyst Pharmaceuticals, Inc. (“Catalyst” or “Company”) (Nasdaq: CPRX) today reported financial results for the second quarter of 2024 and provided a corporate update.

“Since the onset of this year, we have advanced with continued momentum, propelled by the strong performance of our established product portfolio and the successful U.S. commercial launch of AGAMREE. Our accomplishments have significantly strengthened our financial position, aligning with our revenue guidance for the year, and we believe that we are on track to achieve the upper end of our previously provided total revenue forecast,” stated Richard J. Daly, President and CEO of Catalyst. “With unwavering confidence in our ability to execute our strategic objectives, we remain steadfast in our plans to capitalize on new opportunities to broaden our rare orphan portfolio with innovative and differentiated products and expand our market presence, as exemplified by our recent license agreement for AGAMREE in Canada. As we continue to execute our business strategy, we remain focused on enhancing our growth potential and delivering value to our stakeholders, while prioritizing the needs of our patient communities. Backed by our proven track record and dedicated team, we believe that we are well-positioned for sustained success.”

Financial Highlights

For the Three Months Ended June 30,	2024		2023		% Change
(In thousands, except per share data)
Product Revenue, Net	$	122,653	$	99,477		23.3	%
FIRDAPSE Product Revenue, Net	$	77,372	$	64,898		19.2	%
FYCOMPA Product Revenue, Net	$	36,535	$	34,579		5.7	%
AGAMREE Product Revenue, Net	$	8,746		N/A		N/A
GAAP Net Income	$	40,794	$	37,762		8.0	%
Non-GAAP Net Income **	$	69,631	$	60,380		15.3	%
GAAP Net Income Per Share - Basic	$	0.35	$	0.36		(2.8	%)
Non-GAAP Net Income Per Share – Basic**	$	0.59	$	0.57		3.5	%
GAAP Net Income Per Share – Diluted	$	0.33	$	0.33		0	%
Non-GAAP Net Income Per Share – Diluted**	$	0.56	$	0.53		5.7	%
As of June 30, 2024, and December 31, 2023
(In thousands)
Cash and Cash Equivalents	$	375,693	$	137,636		173.0	%

** Statements made in this press release include non-GAAP financial measures. Such information is provided as additional information and not as an alternative to Catalyst’s financial statements presented in accordance with U.S. generally accepted accounting principles (GAAP). These non-GAAP financial measures are intended to enhance an overall understanding of Catalyst’s current financial performance. Catalyst believes that the non-GAAP financial measures presented in this press release provide investors and prospective investors with an alternative method for assessing Catalyst’s operating results in a manner that Catalyst believes is focused on the performance of ongoing operations and provides a more consistent basis for comparison between periods. Non-GAAP financial measures should not be considered in isolation or as a substitute for comparable GAAP accounting. Further, non-GAAP measures of net income used by Catalyst may be different from and not directly comparable to similarly titled measures used by other companies.

Recent Business Highlights

• Achieved strong results with total net product revenues amounting to $122.7 million for Q2 2024, reflecting a robust 23.3% YoY increase.

• Delivered outstanding FIRDAPSE net product revenues of $77.4 million for Q2 2024, evidenced by impressive 19.2% YoY growth.

• Successfully executed the U.S. commercial launch of AGAMREE, a novel corticosteroid treatment for Duchenne Muscular Dystrophy, yielding solid results and surpassing our initial expectations.

• Reported AGAMREE net product revenues of $8.7 million for Q2 2024, marking the first full quarter of U.S. commercial availability.

• Achieved Q2 2024 FYCOMPA net product revenues of $36.5 million, representing a 5.7% YoY performance.

• On May 30, 2024, the FDA approved the 100 mg maximum daily dose of FIRDAPSE, enhancing treatment flexibility for healthcare providers treating LEMS patients.

• In July 2024, Catalyst secured an exclusive license, supply, and commercialization agreement with KYE Pharmaceuticals, Inc., for AGAMREE in Canada, marking a pivotal strategic milestone in expanding the product’s North American footprint.

• Published the Company’s 2023 ESG Report in June 2024, highlighting key achievements and initiatives.

• We currently believe that our total revenue for the year ending December 31, 2024 will be in the upper half of our previously reported total revenue guidance of between $455 million and $475 million.

• We are reaffirming our full-year 2024 FIRDAPSE net product revenue guidance to be approximately $295 million to $310 million and our 2024 FYCOMPA net product revenue guidance to be approximately $130 million to $135 million, respectively.

• We are increasing our full-year 2024 net product revenue guidance for AGAMREE to be approximately $35 million to $40 million, based on the promising demand trend and an encouraging payer landscape.

Second Quarter 2024 Financial Results

Total revenues: In the second quarter of 2024, total revenues were $122.7 million, compared to $99.6 million for the second quarter of 2023, representing an increase of approximately 23.2%.

Product revenue, net: Product revenue, net for the second quarter of 2024 was $122.7 million, compared to $99.5 million for the second quarter of 2023, representing an increase of approximately 23.3%.

Research and development expenses: Research and development expenses for the second quarter of 2024 were $3.0 million, compared to $4.0 million for the second quarter of 2023, representing a decrease of approximately 24.5%.

Selling, general, and administrative expenses: Selling, general, and administrative expenses for the second quarter of 2024 were $40.7 million, compared to $28.4 million for the second quarter of 2023, representing an increase of approximately 43.4%, primarily relating to our preparation for and commercial launch of AGAMREE.

Amortization of intangible assets: Amortization of intangible assets was $9.3 million in the second quarter of 2024, compared to $8.5 million in the second quarter of 2023, representing an increase of approximately 10.1%.

Operating income: Operating income for the second quarter of 2024 was $54.2 million, compared to $46.7 million for the second quarter of 2023, representing an increase of approximately 16.2%.

GAAP net income: GAAP net income for the second quarter of 2024 was $40.8 million ($0.35 per basic and $0.33 per diluted share), compared to GAAP net income of $37.8 million ($0.36 per basic and $0.33 per diluted share) for the second quarter of 2023.

Non-GAAP net income: Non-GAAP net income for the second quarter of 2024 was $69.6 million ($0.59 per basic and $0.56 per diluted share), compared to non-GAAP net income of $60.4 million ($0.57 per basic and $0.53 per diluted share) for the second quarter of 2023.

Cash and cash equivalents: Cash and cash equivalents were $375.7 million as of June 30, 2024.

Our Form 10-Q for the second quarter of 2024, filed with the U.S. Securities and Exchange Commission on August 7, 2024, provides more detailed financial information and analysis of our financial condition and results of operations.

Conference Call & Webcast Details

The Company will host a conference call and webcast on Thursday, August 8, 2024, at 8:30 AM ET to discuss the financial results and provide a business update.

U.S./Canada Dial-in Number:	(877) 407-8912
International Dial-in Number:	(201) 689-8059

A webcast will be accessible under the investor section on the Company’s website at www.catalystpharma.com. A webcast replay will be available on the Catalyst website for 30 days after the event.

About Catalyst Pharmaceuticals

With exceptional patient focus, Catalyst is committed to developing and commercializing innovative first-in-class medicines that address rare and difficult-to-treat diseases. Catalyst’s flagship U.S. commercial product is FIRDAPSE^® (amifampridine) Tablets 10 mg, approved for the treatment of Lambert-Eaton myasthenic syndrome (“LEMS”) in adults and pediatric patients 6 years of age and older. Further, Canada’s national healthcare regulatory agency, Health Canada, has approved the use of FIRDAPSE for the treatment of adult patients in Canada with LEMS. Most recently, on May 30, 2024, the FDA approved an increased maximum daily dose of 100 mg for FIRDAPSE for adults and pediatric patients weighing more than 45 kg.

In January 2023, Catalyst acquired the U.S. commercial rights to FYCOMPA^® (perampanel) CIII, a prescription medicine approved in people with epilepsy aged four and older alone or with other medicines to treat partial-onset seizures with or without secondarily generalized seizures and with other medicines to treat primary generalized tonic-clonic seizures for people with epilepsy aged 12 and older.

On July 18, 2023, Catalyst acquired an exclusive license for North America for AGAMREE^® (vamorolone) oral suspension 40 mg/mL, a novel corticosteroid treatment for Duchenne Muscular Dystrophy. AGAMREE previously received FDA Orphan Drug and Fast Track designations and was approved by the FDA for commercialization in the U.S. on October 26, 2023. AGAMREE became commercially available by prescription in the U.S. on March 13, 2024. Further, in July 2024, Catalyst entered into an exclusive license, supply, and commercialization agreement for AGAMREE in Canada.

For more information about Catalyst, please visit the Company’s website at www.catalystpharma.com. For Full Prescribing and Safety Information for FIRDAPSE^®, please visit www.firdapse.com. For Full Prescribing Information, including Boxed WARNING for FYCOMPA^®, please visit www.fycompa.com. For Full Prescribing Information for AGAMREE^®, please visit www.agamree.com.

Forward-Looking Statements

This press release contains forward-looking statements. Forward-looking statements involve known and unknown risks and uncertainties, which may cause Catalyst’s actual results in future periods to differ materially from forecasted results. A number of factors, including (i) whether the launch of AGAMREE^® will continue to surpass initial expectations and exceed 2024 full-year revenue forecasts for sales of the product that were previously published by the Company (ii) whether AGAMREE’s commercialization will ultimately be profitable, cash flow positive, and accretive to Catalyst, (iii) Catalyst’s ability to continue to successfully sell its current products and continue to be profitable and cash flow positive, (iv) whether Catalyst’s total revenue forecast for 2024 included in this press release will prove to be accurate, (v) whether Catalyst will complete additional acquisitions of products, and the timing of any such acquisitions; (vi) the impact of pending Paragraph IV litigation relating to FIRDAPSE^® if the results of these litigation matters are adverse, (vii) whether AGAMREE will be approved for commercialization in Canada, and (viii) those factors described in Catalyst’s Annual Report on Form 10-K for the 2023 fiscal year, Catalyst’s Quarterly Report on Form 10-Q for the second quarter of 2024, and Catalyst’s other filings with the SEC, could adversely affect Catalyst. Copies of Catalyst’s filings with the SEC are available from the SEC, may be found on Catalyst’s website or obtained upon request from Catalyst. Catalyst does not undertake any obligation to update the information contained herein, which speaks only as of this date.

CATALYST PHARMACEUTICALS, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited)

(in thousands, except share and per share data)

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2024		2023		2024		2023
Product revenue, net	$	122,653	$	99,477	$	221,094	$	184,781
License and other revenue		57		105		125		167
Total revenues		122,710		99,582		221,219		184,948
Operating costs and expenses:
Cost of sales (a)		15,405		12,045		27,925		21,991
Research and development		2,985		3,954		5,566		7,516
Selling, general and administrative (a)		40,730		28,396		87,668		58,114
Amortization of intangible assets		9,344		8,488		18,688		15,019
Total operating costs and expenses		68,464		52,883		139,847		102,640
Operating income		54,246		46,699		81,372		82,308
Other income, net		1,542		1,813		3,505		3,517
Net income before income taxes		55,788		48,512		84,877		85,825
Income tax provision		14,994		10,750		20,808		18,495
Net income	$	40,794	$	37,762	$	64,069	$	67,330
Net income per share:
Basic	$	0.35	$	0.36	$	0.55	$	0.64
Diluted	$	0.33	$	0.33	$	0.52	$	0.59
Weighted average shares outstanding:
Basic		118,180,396		106,258,790		117,493,257		105,911,936
Diluted		124,655,999		113,673,534		124,028,752		113,840,155

(a) exclusive of amortization of intangible assets

CATALYST PHARMACEUTICALS, INC.

RECONCILIATION OF NON-GAAP METRICS (unaudited)

(in thousands, except share and per share data)

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2024		2023		2024		2023
GAAP net income	$	40,794	$	37,762	$	64,069	$	67,330
Non-GAAP adjustments:
Stock-based compensation expense		4,408		3,298		12,656		6,190
Depreciation		91		82		177		151
Amortization of intangible assets		9,344		8,488		18,688		15,019
Income tax provision		14,994		10,750		20,808		18,495
Non-GAAP net income	$	69,631	$	60,380	$	116,398	$	107,185
Non-GAAP net income per share:
Basic	$	0.59	$	0.57	$	0.99	$	1.01
Diluted	$	0.56	$	0.53	$	0.94	$	0.94
Weighted average shares outstanding:
Basic		118,180,396		106,258,790		117,493,257		105,911,936
Diluted		124,655,999		113,673,534		124,028,752		113,840,155

CATALYST PHARMACEUTICALS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands)

	June 30, 2024 (unaudited)		December 31, 2023
Assets
Current Assets:
Cash and cash equivalents	$	375,693	$	137,636
Accounts receivable, net		57,172		53,514
Inventory		18,014		15,644
Prepaid expenses and other current assets		23,550		12,535
Total current assets		474,429		219,329
Operating lease right-of-use asset		2,371		2,508
Property and equipment, net		1,227		1,195
License and acquired intangibles, net		175,361		194,049
Deferred tax assets, net		39,889		36,544
Investment in equity securities		13,083		16,489
Total assets	$	706,360	$	470,114
Liabilities and Stockholders’ Equity
Current Liabilities:
Accounts payable	$	7,116	$	14,795
Accrued expenses and other liabilities		85,202		61,268
Total current liabilities		92,318		76,063
Operating lease liability, net of current portion		2,991		3,188
Other non-current liabilities		2,396		2,982
Total liabilities		97,705		82,233
Total stockholders’ equity		608,655		387,881
Total liabilities and stockholders’ equity	$	706,360	$	470,114

Source: Catalyst Pharmaceuticals, Inc.

Contact information:

Investor Contact

Mary Coleman

Catalyst Pharmaceuticals, Inc.

(305) 420-3200

mcoleman@catalystpharma.com

Media Contact

David Schull

Russo Partners

(858) 717-2310

david.schull@russopartnersllc.com