Company: FRME
Filing Date: 2025-11-06
Form Type: 424B3
Source: 0001193125-25-268801
Chunk: 207

Company: FIRST MERCHANTS CORP
Filing Date: 2025-11-06
Form: 424B3
Chunk 207
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 further waives: (a) any defense in any action for specific performance that a
remedy at law would be adequate; and (b) any requirement under any law to post security as a prerequisite to obtaining equitable relief. All rights, powers and remedies provided under this Agreement or otherwise available in respect hereof at
law or in equity shall be cumulative and not alternative, and the exercise or beginning of the exercise of any thereof by any party shall not preclude the simultaneous or later exercise of any other such rights, powers or remedies by such party.

[THIS SPACE INTENTIONALLY LEFT BLANK.]

A-49

IN WITNESS WHEREOF, First Merchants and First Savings have made and entered into this Agreement as of the day and year first above written and have caused this Agreement to be executed and attested by their duly authorized officers.

| FIRST MERCHANTS CORPORATION         |     |                                                       |
| By:                                 |     | /s/ Mark K. Hardwick                                  |
|                                     |     | Mark K. Hardwick, Chief Executive Officer             |
| FIRST SAVINGS FINANCIAL GROUP, INC. |     |                                                       |
| By:                                 |     | /s/ Larry W. Myers                                    |
|                                     |     | Larry W. Myers, President and Chief Executive Officer |

A-50

EXHIBIT A

VOTING AGREEMENT

THIS
VOTING AGREEMENT (this “Agreement”) is entered into this 24th day of September, 2025, by and among FIRST MERCHANTS CORPORATION, an Indiana corporation (“First Merchants”), and the undersigned shareholders (each, a
“Shareholder”, and collectively, the “Shareholders”) of FIRST SAVINGS FINANCIAL GROUP, INC., an Indiana corporation (“First Savings”).

W I T N E S S E T H:

In
consideration of the execution by First Merchants of the Agreement and Plan of Merger between First Merchants and First Savings of even date herewith (the “Merger Agreement”), the undersigned Shareholders of First Savings hereby agree
that each of them, severally and not jointly, shall cause all First Savings common shares owned by him/her of record and beneficially, including, without limitation, all shares owned by him/her individually, all shares owned jointly by him/her and
his/her spouse, all shares owned by any minor children (or any trust for their benefit), all shares owned by any business of which such Shareholder (if such