SEC FORM 4

SEC FORM 4 SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

PRENSKY ZACHARY

(Last)

(First)

(Middle)

C/O LB PHARMACEUTICALS INC

ONE PENNSYLVANIA PLAZA, SUITE 1025

(Street)

NEW YORK

10119

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
LB PHARMACEUTICALS INC [ LBRX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
09/10/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Option (Right to Buy)	$64.15	09/10/2025		D			3,944	⁽¹⁾	11/13/2028	Common Stock	3,944	⁽²⁾	0	D
Stock Option (Right to Buy)	$15	09/10/2025		A		3,944		⁽¹⁾	11/13/2028	Common Stock	3,944	⁽²⁾	3,944	D
Stock Option (Right to Buy)	$69.72	09/10/2025		D			896	⁽¹⁾	12/22/2029	Common Stock	896	⁽²⁾	0	D
Stock Option (Right to Buy)	$15	09/10/2025		A		896		⁽¹⁾	12/22/2029	Common Stock	896	⁽²⁾	896	D
Stock Option (Right to Buy)	$69.72	09/10/2025		D			1,255	⁽¹⁾	08/30/2030	Common Stock	1,255	⁽²⁾	0	D
Stock Option (Right to Buy)	$15	09/10/2025		A		1,255		⁽¹⁾	08/30/2030	Common Stock	1,255	⁽²⁾	1,255	D
Stock Option (Right to Buy)	$41.84	09/10/2025		D			17,929	⁽³⁾	08/24/2033	Common Stock	17,929	⁽²⁾	0	D
Stock Option (Right to Buy)	$15	09/10/2025		A		17,929		⁽³⁾	08/24/2033	Common Stock	17,929	⁽²⁾	17,929	D
Stock Option (Right to Buy)	$41.84	09/10/2025		D			53,787	⁽⁴⁾	06/26/2034	Common Stock	53,787	⁽²⁾	0	D
Stock Option (Right to Buy)	$15	09/10/2025		A		53,787		⁽⁴⁾	06/26/2034	Common Stock	53,787	⁽²⁾	53,787	D
Stock Option (Right to Buy)	$15	09/10/2025		A		22,449		⁽⁵⁾	09/09/2035	Common Stock	22,449	$0	22,449	D

Explanation of Responses:

1. Immediately exercisable.

2. The transactions reported herein reflect a one-time stock option repricing, effective on September 10, 2025, which reduced the per share exercise price of each repriced option to $15, representing the initial public offering price of the Issuer's common stock (the "Option Repricing"). Except as modified by the Option Repricing, all other terms and conditions of the repriced options, including, without limitation, any provisions with respect to vesting, remain in full force and effect.

3. One fourth (1/4) of the shares subject to the option award vested on August 25, 2024 and the remaining shares subject to the option vested or shall vest in thirty-six (36) equal monthly installments thereafter, subject to the Reporting Person's continuous service through such vesting date.

4. One fourth (1/4) of the shares subject to the option award vested on June 28, 2025 and the remaining shares subject to the option vested or shall vest in thirty-six (36) equal monthly installments thereafter, subject to the Reporting Person's continuous service through such vesting date.

5. The option award shall vest in three (3) equal annual installments on September 10, 2026, September 10, 2027 and September 10, 2028, subject to the Reporting Person's continuous service through such vesting date.

	/s/ Marc Panoff, Attorney-in-Fact	09/12/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

SEC Form 4 filed by Director Prensky Zachary