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 * MURPHY CHRISTOPHER J III 2. Issuer Name and Ticker or Trading Symbol 1ST SOURCE CORP [SRCE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director __X__ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Executive Chairman (Last) (First) (Middle) PO BOX 1602 3. Date of Earliest Transaction (Month/Day/Year) 09/23/2025 (Street) SOUTH BEND, IN 46634 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 09/23/2025 A(1) 10,000 A $ 0 495,885 D Common Stock 66,023(2) I By 401(k) Common Stock 2,527,512(3) I By Spouse Common Stock 125,893 I By Corporation Common Stock 282,119(4) I By ERCO III Partnership Common Stock 214,770 I By Ltd. Partnership Common Stock 584,600(5) I By LLC

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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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
MURPHY CHRISTOPHER J III PO BOX 1602 SOUTH BEND, IN 46634	X	X	Executive Chairman

Signatures

/s/ Brian S. Duba, Attorney-in-Fact		02/05/2026
**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)	1982 Restricted Stock Award Plan (the "Plan") awards pursuant to Employment Agreement dated September 23, 2025 between 1st Source Corporation and Mr. Murphy. Awards are subject to vesting and continued employment requirements as provided in the Plan and Employment Agreement.
(2)	Between January 1, 2025 and December 31, 2025, Mr. Murphy acquired 1,621 shares of 1st Source Corporation common stock under the 401(k) plan. The information in this report is based on a plan statement dated December 31, 2025. In addition, between January 1, 2024 and December 31, 2024, Mr. Murphy acquired 1,672 shares of 1st Source Corporation common stock under the 401(k) plan. This information is based on a plan statement dated December 31, 2024. These shares were inadvertently omitted from the reporting person's 401(k) plan holdings as reported in the Form 4 filed by the reporting person with the Securities and Exchange Commission on December 11, 2025.
(3)	Mr. Murphy disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that Mr. Murphy is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.
(4)	Mr. Murphy disclaims beneficial ownership of those shares held by the partnership exceeding his pecuniary interest, and this report shall not be deemed an admission that Mr. Murphy is the beneficial owner of such excess shares for purposes of Section 16 or for any other purpose.
(5)	Mr. Murphy's spouse is a voting member, and Mr. Murphy is a non-voting member, of the LLC. Mr. Murphy disclaims beneficial ownership of those shares held by the LLC exceeding his pecuniary interest, and this report shall not be deemed an admission that Mr. Murphy is the beneficial owner of such excess shares for purposes of Section 16 or for any other purpose.

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