[Form 4] LB PHARMACEUTICALS INC Insider Trading Activity

Rhea-AI Filing Summary

LB Pharmaceuticals Inc director Rebecca Luse received a grant of stock options covering 10,000 shares of common stock. The options have an exercise price of $27.95 per share and expire on June 2, 2036. All underlying shares vest on the earlier of June 3, 2027 or the company’s next annual stockholder meeting, as long as she remains in continuous service.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Luse Rebecca

Role null

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (Right to Buy)	10,000	$0.00	--

Holdings After Transaction: Stock Option (Right to Buy) — 10,000 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Option grant size: 10,000 shares Exercise price: $27.95 per share Expiration date: June 2, 2036 +2 more

5 metrics

Option grant size 10,000 shares Stock options granted to director Rebecca Luse

Exercise price $27.95 per share Stock option strike price

Expiration date June 2, 2036 Option expiration

Vesting date trigger June 3, 2027 Earlier of this date or next annual meeting

Shares underlying option after grant 10,000 shares Total options held following transaction

Key Terms

Stock Option (Right to Buy), exercise price, vesting, annual meeting of stockholders, +1 more

5 terms

Stock Option (Right to Buy) financial

"security_title: Stock Option (Right to Buy)"

exercise price financial

"conversion_or_exercise_price: 27.9500"

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

vesting financial

"100% of the shares underlying the option vest on the earlier of"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

annual meeting of stockholders financial

"or (ii) the date of the Issuer's next annual meeting of stockholders"

continuous service financial

"subject to the Reporting Person's continuous service through such vesting date"

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Form 4 Insider Transactions: What Each Field Means →

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Luse Rebecca

(Last) (First) (Middle)

C/O LB PHARMACEUTICALS INC

ONE PENNSYLVANIA PLAZA, SUITE 1025

(Street)

NEW YORK NEW YORK 10119

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/03/2026

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

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

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

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)
			Code	V	Amount	(A) or (D)	Price

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	$27.95	06/03/2026		A		10,000		(1)	06/02/2036	Common Stock	10,000	$0	10,000	D

Explanation of Responses:

1. 100% of the shares underlying the option vest on the earlier of (i) June 3, 2027 or (ii) the date of the Issuer's next annual meeting of stockholders, subject to the Reporting Person's continuous service through such vesting date.

	/s/ Marc Panoff, Attorney-in-Fact	06/05/2026
	** 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.
* Form 4: SEC 1474 (03-26)