Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 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 that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 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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(Print or Type Responses)

1. Name and Address of Reporting Person * Dimension Capital II, L.P. 2. Issuer Name and Ticker or Trading Symbol Odyssey Therapeutics, Inc. [ODTX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 632 BROADWAY, SUITE 801 3. Date of Earliest Transaction (Month/Day/Year) 05/08/2026 (Street) NEW YORK, NY 10012 4. If Amendment, Date 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 (City) (State) (Zip) 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 05/08/2026 C 1,709,543 A (1) 2,222,405 D(2)(3) Common Stock 05/08/2026 P 1,111,111 A $18 3,333,516 D(2)(3)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 Underlying Securities (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 of Derivative Security: 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

Series D Convertible Preferred Stock

(1)

05/08/2026

C

16,611,626

(1)

(1)

Common Stock

1,709,543(4)

(1)

0

D(2)(3)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Dimension Capital II, L.P. 632 BROADWAY, SUITE 801 NEW YORK, NY 10012	X

Signatures

s/ Adam Goulburn - for Dimension Capital II, L.P., By: Dimension Capital II GP, LP, its general partner, By: Adam Goulburn, Member		05/12/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	The Series D Preferred Stock automatically converted into Common Stock immediately prior to the closing of the Issuer's initial public offering on a 1-for-9.7170 basis for no additional consideration.
(2)	Held directly by Dimension Capital II, L.P. ("Dimension Capital II"). Dimension Management, L.P. ("Dimension Management") is the investment advisor to Dimension Capital II. Dimension Management GP, L.P. is the general partner of Dimension Management, and Dimension Management GP, LLC ("Dimension Management GP") is the general partner of Dimension Management GP, L.P. Dimension Capital II GP, LLC ("Dimension Capital II GP") is the general partner to the general partner of Dimension Capital II. Adam Goulburn, Zavain Dar, and Nan Li are members of each of Dimension Management GP and Dimension Capital II GP. Mr. Li serves on the Issuer's board of directors.
(3)	Each of Dimension Management, Dimension Management GP, Dimension Capital II GP, Mr. Goulburn, Mr. Dar, and Mr. Li disclaims, for purposes of Section 16 of the Securities Exchange Act of 1934, beneficial ownership of such securities, except to the extent of his/its indirect pecuniary interest therein.
(4)	Gives effect to the 1-for-9.7170 reverse stock split effected prior to the closing of the Issuer's initial public offering.

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