OS Therapies (OSTX) director reports 140,000-share stock option grant

Rhea-AI Filing Summary

OS Therapies Inc. director reports new stock option grant and holdings. Theodore F. Search, a director of OS Therapies Inc., reported receiving stock options on 10/21/2025 to buy 140,000 shares of common stock at an exercise price of $1.8 per share. These options vest in full on the one-year anniversary of the grant date, as long as he is still serving as a director on that date, and expire on 10/21/2035.

After this grant, he beneficially owns 140,000 stock options directly. He also reports beneficial ownership of 20,000 common shares directly and 435,835 common shares indirectly through Mill River Partners LLC, where he serves on the board of managers and shares voting and investment power.

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

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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^*

Search Theodore F.

(Last) (First) (Middle)

C/O OS THERAPIES INCORPORATED

115 PULLMAN CROSSING ROAD, SUITE 103

(Street)

GRASONVILLE MD 21638

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
OS Therapies Inc [ OSTX ]

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)
10/21/2025

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock								435,835	I	Mill River Partners LLC(1)
Common Stock								20,000	D

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 options (right to buy)	$1.8	10/21/2025		A		140,000		(2)	10/21/2035	Common Stock	140,000	$0	140,000	D

Explanation of Responses:

1. Theodore F. Search serves on the board of managers of Mill River Partners LLC and shares voting and investment power with respect to these shares.

2. On October 21, 2025, the reporting person was granted options to purchase 140,000 shares of the issuer's common stock pursuant to the terms and conditions of a stock option award agreement. These options vest in full on the one-year anniversary of the date of grant, provided that the reporting person is serving as a director of the issuer on such date.

	/s/ Theodore F. Search	12/19/2025
	** 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.

FAQ

What insider transaction did OS Therapies Inc (OSTX) report for Theodore F. Search?

Theodore F. Search reported receiving stock options on 10/21/2025 to purchase 140,000 shares of OS Therapies Inc. common stock at an exercise price of $1.8 per share.

When do Theodore F. Search’s new OS Therapies (OSTX) stock options vest and expire?

The options vest in full on the one-year anniversary of the 10/21/2025 grant date, provided he is still serving as a director on that date, and they expire on 10/21/2035.

How many OS Therapies (OSTX) stock options does Theodore F. Search own after this transaction?

Following the reported transaction, Theodore F. Search beneficially owns 140,000 stock options for OS Therapies Inc. common stock directly.

What direct and indirect OS Therapies (OSTX) shareholdings does Theodore F. Search report?

He reports owning 20,000 common shares directly and 435,835 common shares indirectly through Mill River Partners LLC, where he serves on the board of managers and shares voting and investment power.

What is Theodore F. Search’s role at OS Therapies Inc (OSTX)?

He is a director of OS Therapies Inc and filed this report as a single reporting person on the Form 4.