What is Mill River Partners LLC’s role in OS Therapies (OSTX) share ownership?

Mill River Partners LLC holds 435,835 OS Therapies common shares that are reported as indirectly owned by Theodore F. Search. He serves on Mill River’s board of managers and shares voting and investment power over these shares according to the filing’s footnote.

OSTX Form 4 reports acquisition/exercise transactions

Search Theodore F. reported acquisition or exercise transactions in a Form 4 filing for OSTX.

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Form Type

Rhea-AI Filing Summary

Search Theodore F. reported acquisition or exercise transactions in a Form 4 filing for OSTX. The filing lists transactions totaling 50,000 shares. Following the reported transactions, holdings were 50,000 shares.

Insider Trade Summary

Grant/Award: 50,000 shares

Grant/Award 3 txns

Insider Search Theodore F.

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Stock options (right to buy)	50,000	$0.00	$0.00
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Stock options (right to buy) — 50,000 contracts (Direct); Common Stock — 435,835 shares (Indirect, Mill River Partners LLC); Common Stock — 20,000 shares (Direct)

Footnotes (2)

F1. 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.
F2. On January 22, 2026, the reporting person was granted options to purchase 50,000 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.

FAQ

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

OS Therapies reported that director Theodore F. Search received a grant of stock options for 50,000 shares on January 22, 2026. The options allow him to buy common stock at $1.34 per share, vesting after one year of continued board service.

How many OS Therapies (OSTX) stock options were granted to director Theodore F. Search?

He was granted stock options covering 50,000 shares of OS Therapies common stock. These options were awarded on January 22, 2026 and vest in full one year later, assuming he remains a director on that anniversary date.

What is the exercise price and vesting schedule of the OS Therapies (OSTX) options granted?

The stock options have an exercise price of $1.34 per share and were granted on January 22, 2026. They vest in full on the one-year anniversary of the grant date, provided Theodore F. Search continues serving as a director at that time.

How many OS Therapies (OSTX) shares does Theodore F. Search own directly and indirectly?

After the reported transactions, he owns 20,000 OS Therapies common shares directly. He also has indirect beneficial ownership of 435,835 shares held through Mill River Partners LLC, where he serves on the board of managers and shares voting and investment power.

Is the OS Therapies (OSTX) option grant to Theodore F. Search a purchase or an award?

The transaction is reported as an award, not an open-market purchase. The Form 4 classifies it under code A as a grant or other acquisition of derivative securities, granting options to buy 50,000 shares at $1.34 per share with future vesting conditions.

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Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 02/13/2026 - 04:43 PM EST

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^*

Search Theodore F.

(Last)

(First)

(Middle)

C/O OS THERAPIES INCORPORATED

115 PULLMAN CROSSING ROAD, SUITE 103

(Street)

GRASONVILLE

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)
01/22/2026

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)
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)
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 options (right to buy)	$1.34	01/22/2026		A		50,000		⁽²⁾	01/22/2036	Common Stock	50,000	$0	50,000	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 January 22, 2026, the reporting person was granted options to purchase 50,000 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	02/13/2026
	** 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.

Source: View Original Filing on SEC EDGAR