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 * BIRMINGHAM MELODY 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 _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) PO BOX 1602 3. Date of Earliest Transaction (Month/Day/Year) 08/15/2018 (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 08/15/2018 P 0.538(1) A $ 0 (2) 8,173.538(3) D Common Stock 11/15/2018 P 0.64(1) A $ 0 (2) 8,174.178 D Common Stock 02/14/2019 P 0.712(1) A $ 0 (2) 8,174.89 D Common Stock 05/15/2019 P 0.716(1) A $ 0 (2) 8,175.606 D Common Stock 08/15/2019 P 0.741(1) A $ 0 (2) 8,176.347 D Common Stock 11/15/2019 P 0.705(1) A $ 0 (2) 8,177.052 D Common Stock 02/14/2020 P 0.761(1) A $ 0 (2) 8,177.813 D Common Stock 05/15/2020 P 1.906(1) A $ 0 (2) 8,179.719 D Common Stock 08/14/2020 P 0.963(1) A $ 0 (2) 8,180.682 D Common Stock 11/13/2020 P 0.982(1) A $ 0 (2) 8,181.664 D Common Stock 02/12/2021 P 42.33(1) A $ 0 (2) 8,223.994 D Common Stock 05/14/2021 P 29.635(1) A $48.06 8,253.629 D Common Stock 08/13/2021 P 35.226(1) A $47.56 8,288.855 D Common Stock 11/12/2021 P 34.653(1) A $50.84 8,323.508 D Common Stock 02/16/2022 P 36.376(1) A $48.72 8,359.884 D Common Stock 05/13/2022 P 40.221(1) A $44.35 8,400.105 D Common Stock 08/12/2022 P 38.23(1) A $48.5 8,438.335 D Common Stock 11/10/2022 P 32.41(1) A $57.58 8,470.745 D Common Stock 02/16/2023 P 39.168(1) A $49.55 8,509.913 D Common Stock 05/12/2023 P 47.669(1) A $40.98 8,557.582 D Common Stock 08/11/2023 P 53.488(1) A $48.21 8,611.07 D Common Stock 11/15/2023 P 58.411(1) A $47.21 8,669.481 D Common Stock 02/15/2024 P 56.107(1) A $49.5 8,725.588 D Common Stock 05/15/2024 P 53.336(1) A $52.43 8,778.924 D Common Stock 08/15/2024 P 52.27(1) A $57.02 8,831.194 D Common Stock 11/15/2024 P 46.431(1) A $66.53 8,877.625 D Common Stock 02/14/2025 P 46.773(1) A $66.41 8,924.398 D Common Stock 05/15/2025 P 52.806(1) A $62.42 8,977.204 D Common Stock 08/15/2025 P 54.09(1) A $61.31 9,031.294 D Common Stock 11/14/2025 P 56.92(1) A $61.71 9,088.214 D

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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
BIRMINGHAM MELODY PO BOX 1602 SOUTH BEND, IN 46634	X

Signatures

/s/ Brian S. Duba, Attorney-in-Fact		03/10/2026
**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)	This Form 4 reports previously unreported open-market purchases of the issuer's common stock made using cash dividends received by the reporting person. Fractional shares were credited by the reporting person's brokerage account.
(2)	Transaction price information is unavailable for certain historical open market transactions reported on this Form 4.
(3)	The reporting person conducted a reconciliation of historical brokerage activity and determined that beneficial ownership had been understated by 189 shares in prior filings, beginning with the ownership baseline established at the time of the reporting person's initial Form 3. No transaction occurred in connection with the adjustment. The ownership amount reported herein reflects the reporting person's correct beneficial ownership.
Remarks: This Form 4 is the first of two Form 4s being filed by the Reporting Person relating to previously unreported open-market purchases of the issuer's common stock made using cash dividends received by the reporting person. The Form 4 has been split into two filings to cover all 31 individual transactions, because the SEC's EDGAR filing system limits a single Form 4 to a maximum of 30 separate transactions. Each Form 4 will be filed by the Reporting Person.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure. Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.