POS EX

As filed with the Securities and Exchange Commission on May 31, 2024

Registration No. 333-274427

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

POST-EFFECTIVE AMENDMENT NO. 1

TO

FORM S-3

UNDER

THE SECURITIES ACT OF 1933

Catalyst Pharmaceuticals, Inc.

(Exact name of registrant as specified in its charter)

Delaware	2834	76-0837053
(State or other jurisdiction of incorporation or organization)	(Primary Standard Industrial Classification Code Number)	(I.R.S. Employer Identification No.)

355 Alhambra Circle

Suite 801

Coral Gables, Florida 33134

(305) 420-3200

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Richard J. Daly

Catalyst Pharmaceuticals, Inc.

355 Alhambra Circle, Suite 801

Coral Gables, Florida 33134

(305) 420-3200

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Philip B. Schwartz, Esq.

Andrew E. Schwartz, Esq.

Akerman LLP

201 East Las Olas Boulevard

Suite 1800

Fort Lauderdale, Florida 33301

(954) 463-2700

Approximate date of commencement of proposed sale of the securities to the public: From time to time after this Registration Statement becomes effective.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box:

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box:

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box.

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box.

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 the definitions of “large accelerated filer,” “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 provided to Section 7(a)(2)(B) of the Securities Act. ☐

EXPLANATORY NOTE

Catalyst Pharmaceuticals, Inc. (the “Company”) is filing this Post-Effective Amendment No. 1 to the Company’s Registration Statement on Form S-3 ASR (File No. 333-274427) for the purpose of providing the auditor consent that was inadvertently omitted from the original filing, which consent is attached hereto as Exhibit 23.2. Other than the addition of the exhibit and the corresponding change to the exhibit index, the remainder of this Registration Statement remains unchanged. Accordingly, the prospectus that forms a part of the Registration Statement is not reproduced in this Post-Effective Amendment No. 1.

This Post-Effective Amendment No. 1 does not reflect events occurring after the effective date of the Company’s Registration Statement or modify or update the disclosures therein in any way other than as required to reflect the amendment set forth below.

1

PART II – INFORMATION NOT REQUIRED IN THE PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution

The following table sets forth all expenses to be paid by the registrant, other than underwriting discounts and commissions, in connection with this offering. All amounts shown are estimates except for the registration fee.

SEC registration fee	$29,140†
Legal fees and expenses	*
Accounting fees and expenses	*
Miscellaneous expenses	*
Total	*

† Includes a credit for a previously paid but unused registration fee. See Exhibit 107 to this Registration Statement for further details.

* Such expenses cannot be determined at this time. They will be disclosed in any Prospectus Supplement we file in relation to the securities registered under the Registration Statement.

Item 15. Indemnification of Directors and Officers

Our certificate of incorporation contains provisions that eliminate, to the maximum extent permitted by the Delaware General Corporation Law, the personal liability of directors and executive officers for monetary damages for breach of their fiduciary duties as a director or officer. Our certificate of incorporation and bylaws provide that we shall indemnify our directors and executive officers and may indemnify our employees and other agents to the fullest extent permitted by the Delaware General Corporation Law.

Sections 145 and 102(b)(7) of the General Corporation Law of the State of Delaware provide that a corporation may indemnify any person made a party to an action by reason of the fact that he or she was a director, executive officer, employee or agent of the corporation or is or was serving at the request of the corporation against expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by him or her in connection with such action if he or she acted in good faith and in a manner he or she reasonably believed to be in, or not opposed to, the best interests of the corporation and, with respect to any criminal action or proceeding, had no reasonable cause to believe his or her conduct was unlawful, except that, in the case of an action by or in right of the corporation, no indemnification may generally be made in respect of any claim as to which such person is adjudged to be liable to the corporation.

We have purchased and intend to maintain insurance on behalf of any person who is or was a director or officer of our company against any loss arising from any claim asserted against him or her and incurred by him or her in any such capacity, subject to certain exclusions.

See also the undertakings set forth in our response to Item 17 herein.

II-1

Item 16. Exhibits

The following exhibits are filed herewith or incorporated by reference herein:

Exhibit Number	Description of Exhibit	Form		File Number		Date of Filing		Exhibit Number		Filed Herewith
1.1*	Form of Underwriting Agreement
2.1	Agreement and Plan of Merger, dated August  14, 2006, between the Company and Catalyst Pharmaceutical Partners, Inc., a Florida corporation		S-1		333-136039		9/1/2006		10.9
3.1	Certificate of Incorporation		S-1		333-136039		7/25/2006		3.1
3.2	Amendment to Certificate of Incorporation		S-1		333-136039		7/25/2006		3.2
3.3	Amendment to Certificate of Incorporation		DEF 14A		001-33057		3/30/2015		Annex A
3.4	Amendment to Certificate of Incorporation		8-K		001-33057		8/21/2020		3.1
4.1	Specimen Stock Certificate for Common Stock		S-1		333-136039		9/1/2006		4.1
4.2	Description of the Company’s Capital Stock		10-K		001-33057		3/16/2022		4.5
4.3	Form of Indenture		S-3		333-240052		7/23/2020		4.5
5.1	Consent of Akerman LLP		S-3ASR		333-274427		9/8/2023		5.1
23.1	Consent of Grant Thornton LLP		S-3ASR		333-274427		9/8/2023		23.1
23.2	Consent of Deloitte & Touche LLP										X
23.3	Consent of Akerman LLP (included in Exhibit 5.1)		S-3ASR		333-274427		9/8/2023		5.1
24.1	Power of Attorney (included in the signature page hereto)										X
25.1*	Statement of Eligibility of Trustee under the Indenture
107	Filing Fee Table		S-3ASR		333-274427		9/8/2023		107

* To be filed by amendment or by a report filed under the Exchange Act and incorporated herein by reference, if applicable.

II-2

Item 17. Undertakings

(a) The undersigned registrant hereby undertakes:

(1) To file, during any period in which offers or sales are being made, a post-effective amendment to the registration statement:

(i) To include any prospectus required by Section 10(a)(3) of the Securities Act of 1933;

(ii) To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the SEC pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20 percent change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective registration statement; and

(iii) To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement;

Provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) of this section do not apply if the registration statement is on Form S-3 or Form F-3 and the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the SEC by the registrant pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference into the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement.

(2) That, for the purpose of determining any liability under the Securities Act of 1933, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

(4) That, for the purpose of determining liability under the Securities Act of 1933 to any purchaser:

(i) If the registrant is relying on Rule 430B,

(A) Each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the date the filed prospectus was deemed part of and included in the registration statement; and

II-3

(B) Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5) or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii) or (x) for the purpose of providing the information required by Section 10(a) of the Securities Act of 1933 shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which that prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. Provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to the effective date.

(5) That, for the purpose of determining liability of the registrant under the Securities Act of 1933 to any purchaser in the initial distribution of the securities, the undersigned registrant undertakes that in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer and sell such securities to such purchaser:

(i) Any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;

(ii) Any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by the undersigned registrant;

(iii) The portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and

(iv) Any other communication that is an offer in the offering made by the undersigned registrant to the purchaser.

(b) The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act of 1933, each filing of the registrant’s annual report pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to Section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(c) Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Securities Act of 1933 and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding), is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act of 1933 and will be governed by the final adjudication of such issue.

II-4

(d) The undersigned registrant hereby undertakes that:

(1) For purposes of determining any liability under the Securities Act of 1933, the information omitted from the form of prospectus filed as a part of this registration statement in reliance on Rule 430A and contained in a form of prospectus filed by the registrant pursuant to Rule 424(b)(1) or (4) or 497(h) under the Securities Act shall be deemed to be a part of this registration statement as of the time it was declared effective.

(2) For the purpose of determining any liability under the Securities Act of 1933, each post-effective amendment that contains a form of prospectus shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at the time shall be deemed to be the initial bona fide offering thereof.

(e) The undersigned registrant hereby undertakes to file an application for the purpose of determining the eligibility of the trustee to act under Subsection (a) of Section 310 of the Trust Indenture Act in accordance with the rules and regulations prescribed by the SEC under Section 305(b)(2) of the Trust Indenture Act.

II-5

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this Post-Effective Amendment No. 1 to Registration Statement to be signed on behalf of the undersigned, thereunto authorized, in the City of Coral Gables, State of Florida, on the 31^st day of May, 2024.

CATALYST PHARMACEUTICALS, INC.
By:	/s/ Richard J. Daly
	Richard J. Daly
	President and CEO

Each person whose signature appears below hereby constitutes and appoints Richard J. Daly and Michael W. Kalb, and each of them, as their true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution for him and in his name, place, and stead, in any and all capacities, to sign any or all amendments or supplements to this registration statement, whether pre-effective or post-effective, including any subsequent registration statement for the same offering which may be filed under Rule 462(b) under the Securities Act of 1933, as amended, to file the same with all exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing necessary or appropriate to be done with respect to this registration statement or any amendments or supplements hereto in the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming that all said attorneys-in-fact and agents, or any of them, or this or his substitute or substitutes, may lawfully do or cause to be done by virtue thereof.

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons, in the capacities and on the dates indicated.

Signature	Title	Date
/s/ Richard J. Daly Richard J. Daly	President, Chief Executive Officer, and Director (Principal Executive Officer)	May 31, 2024
/s/ Michael W. Kalb Michael W. Kalb	Executive Vice President and Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer)	May 31, 2024
/s/ Patrick J. McEnany Patrick J. McEnany	Chairman of the Board of Directors	May 31, 2024
/s/ Donald A. Denkhaus Donald A. Denkhaus	Director	May 31, 2024
/s/ Molly Harper Molly Harper	Director	May 31, 2024
/s/ Charles B. O’Keeffe Charles B. O’Keeffe	Director	May 31, 2024
/s/ Tamar Thompson Tamar Thompson	Director	May 31, 2024
/s/ David S. Tierney, M.D. David S. Tierney, M.D.	Director	May 31, 2024

II-6

EX-23.2

Exhibit 23.2

CONSENT OF INDEPENDENT AUDITORS

We consent to the incorporation by reference in this Registration Statement No. 333-274427 on Form S-3 of our report dated April 10, 2023 relating to the abbreviated financial statements of the FYCOMPA PRODUCT LINE OF EISAI CO., LTD. AND SUBSIDIARIES appearing in the Current Report on Form 8-K of Catalyst Pharmaceuticals, Inc filed on April 10, 2023.

/s/ Deloitte & Touche LLP

Morristown, NJ

May 31, 2024