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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1. Name and Address of Reporting Person * Rubin Marc 2. Issuer Name and Ticker or Trading Symbol CURIS INC [CRIS] 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) 128 SPRING STREET, BUILDING C - SUITE 500 3. Date of Earliest Transaction (Month/Day/Year) 03/17/2026 (Street) LEXINGTON, MA 02421 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

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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 B Convertible Preferred Stock

(1)

03/17/2026

A

20

(1)

(1)

Common Stock

26,667

(2)

20

D

Series A Warrant (right to buy)

$0.75

03/17/2026

A

26,667

(3)

01/08/2031

Common Stock

26,667

(2)

26,667

D

Series B Warrant (right to buy)

$0.75(4)

03/17/2026

A

26,667

(4)

(4)

Common Stock

26,667

(2)

26,667

D

Series C Warrant (right to buy)

$0.75

03/17/2026

A

26,667

(5)

07/08/2027

Common Stock

26,667

(2)

26,667

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Rubin Marc 128 SPRING STREET BUILDING C - SUITE 500 LEXINGTON, MA 02421	X

Signatures

/s/ Diantha Duvall, Attorney-in-fact		03/18/2026
**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)	Each share of Series B Convertible Non-Redeemable Preferred Stock ("Series B Preferred Stock") automatically converts into 1,333.33 shares of Common Stock for no additional consideration at 5 p.m. Eastern Time on March 20, 2026, subject to the terms of the Certificate of Designations, Preferences and Rights of Series B Convertible Non-Redeemable Preferred Stock of Curis, Inc. (the "Certificate of Designations") and subject to the applicable Beneficial Ownership Limitations (as defined in the Certificate of Designations).
(2)	Each share of Series B Preferred Stock was sold together with a Series A Warrant to purchase 1,333.33 shares of Common Stock, a Series B Warrant to purchase 1,333.33 shares of Common Stock and a Series C Warrant to purchase 1,333.33 shares of Common Stock (collectively, a "Security"). The Securities were sold at a purchase price of $1,000.00 per Security to the Reporting Person.
(3)	Each Series A Warrant became immediately exercisable following the receipt of Requisite Stockholder Approval and the Certificate of Amendment Filing (each as defined in the Series A Warrant) on March 17, 2026.
(4)	The Series B Warrants became immediately exercisable following the receipt of Requisite Stockholder Approval and the Certificate of Amendment Filing (each as defined in the Series B Warrant) and will terminate upon the 30th calendar day following date on which the Company publicly announces that the fifth patient has been dosed in the Company's Phase 2 clinical trial of emavusertib in combination with an approved Bruton Tyrosine Kinase Inhibitor in chronic lymphocytic leukemia ("Initial Termination Date"). If the closing sale price of the Company's Common Stock at the Initial Termination Date is below $0.75 (the "Exercise Price"), such Exercise Price will be reset to the closing sale price of the Company's Common Stock on the Initial Termination Date (provided that the Exercise Price will not be reduced to less than 50% of the initial Exercise Price) and the Initial Termination Date will be extended an additional 30 days.
(5)	The Series C Warrants became immediately exercisable following the receipt of Requisite Stockholder Approval and the Certificate of Amendment Filing on March 17, 2026.

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