FFBC

SEC source: 0001127602-18-018761 · form4.xml · nonDerivative · entry 1

BARRON WILLIAM G · CIK 0001256237 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 73,514.605

SEC source: 0001127602-18-018758 · form4.xml · nonDerivative · entry 1

Bardwell Kathleen · CIK 0001532367 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,735

SEC source: 0001127602-18-018752 · form4.xml · nonDerivative · entry 1

Ach J Wickliffe · CIK 0001386641 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,716

SEC source: 0001127602-18-017208 · form4.xml · nonDerivative · entry 2

DAVIS CLAUDE E · CIK 0001160676 · Director · Executive Chairman

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 369,566

F3 · price: The price reported is an average price per share. The prices ranged from $32.175 to $32.40 per share.

SEC source: 0001127602-18-017208 · form4.xml · nonDerivative · entry 1

DAVIS CLAUDE E · CIK 0001160676 · Director · Executive Chairman

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 385,187

F1 · price: The price reported is an average price per share. The prices ranged from $32.00 to $32.275 per share.

F2 · balance_after: In addition to the sale of stock, the balance of shares owned has been adjusted to include all directly-owned common stock, including FFBC restricted and restricted performance shares (previously reported as indirectly held).

SEC source: 0001127602-18-015737 · form4.xml · nonDerivative · entry 1

Ringwald Bradley J · CIK 0001632748 · President, Community Banking

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,687

F1 · balance_after: In addition to the sale of stock, the balance of shares owned has been adjusted to include all directly-owned common stock, including FFBC restricted and restricted performance shares (previously reported as indirectly held).

SEC source: 0001127602-18-014969 · form4.xml · nonDerivative · entry 1

Rahe Maribeth S · CIK 0001321410 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,977

F1 · balance_after: In addition to the purchase of stock, the balance of shares owned has been adjusted to include all directly-owned common stock, including FFBC Directors Fee Stock Plan shares (previously reported separately) and restricted shares (previously reported as indirectly held).

SEC source: 0001127602-18-014968 · form4.xml · nonDerivative · entry 2

olszewski richard e · CIK 0001330834 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 44,777

F1 · balance_after: In addition to the purchase of stock, the balance of shares owned has been adjusted to include all directly-owned common stock, including FFBC Directors Fee Stock Plan shares (previously reported separately), restricted shares (previously reported as indirectly held), shares held jointly with spouse (previously reported as indirectly held), shares in an IRA (previously reported as indirectly held), shares held in a joint brokerage account (previously reported as indirectly held), and restricted shares (previously reported as indirectly held).

SEC source: 0001127602-18-014967 · form4.xml · nonDerivative · entry 1

Neighbours John T · CIK 0001651798 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,328

F1 · balance_after: In addition to the purchase of stock, the balance of shares owned has been adjusted to include all directly-owned common stock, including FFBC Directors Fee Stock Plan shares (previously reported separately) and restricted shares (previously reported as indirectly held).

SEC source: 0001127602-18-014965 · form4.xml · nonDerivative · entry 1

PURKRABEK KNUST SUSAN L · CIK 0001167413 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,364.5454

F1 · ownership.direct: In addition to the purchase of stock, the balance of shares owned has been adjusted to include all directly-owned common stock, including FFBC Directors Fee Stock Plan shares (previously reported separately) and restricted shares (previously reported as indirectly held). Balance of shares also includes dividend reinvestment account shares per statement dated 3/31/2018.

SEC source: 0001127602-18-014966 · form4.xml · nonDerivative · entry 1

kramer william j · CIK 0001330835 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,201.2494

F1 · balance_after: In addition to the purchase of stock, the balance of shares owned has been adjusted to include all directly-owned common stock, including FFBC Directors Fee Stock Plan shares (previously reported separately) and restricted shares (previously reported as indirectly held). Balance of shares also includes dividend reinvestment account shares per statement dated 3/31/2018.

SEC source: 0001127602-18-014964 · form4.xml · nonDerivative · entry 1

FINNERTY CORINNE R · CIK 0001167397 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 55,553

F1 · balance_after: In addition to the purchase of stock, the balance of shares owned has been adjusted to include all directly-owned common stock, including FFBC Directors Fee Stock Plan shares (previously reported separately), restricted shares (previously reported as indirectly held), and shares held jointly with spouse (previously reported as indirectly held).

SEC source: 0001127602-18-014963 · form4.xml · nonDerivative · entry 1

Booth Cynthia O · CIK 0001510150 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,734

F1 · balance_after: In addition to the purchase of stock, the balance of shares owned has been adjusted to include all directly-owned common stock, including FFBC Directors Fee Stock Plan shares (previously reported separately) and restricted shares (previously reported as indirectly held).

SEC source: 0001127602-18-014962 · form4.xml · nonDerivative · entry 1

Ach J Wickliffe · CIK 0001386641 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,168

F1 · balance_after: In addition to the purchase of stock, the balance of shares owned has been adjusted to include all directly-owned common stock, including FFBC Directors Fee Stock Plan shares (previously reported separately) and restricted shares (previously reported as indirectly held).

SEC source: 0001127602-18-013878 · form4.xml · nonDerivative · entry 4

Woods Karen B · CIK 0001662727 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Indirect · Restricted-P

Disclosed balance after: 1,075

SEC source: 0001127602-18-013878 · form4.xml · nonDerivative · entry 3

Woods Karen B · CIK 0001662727 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Indirect · Restricted

Disclosed balance after: 3,224

SEC source: 0001127602-18-013875 · form4.xml · nonDerivative · entry 4

BROWN ARCHIE M JR · CIK 0001214961 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · Restricted-P

Disclosed balance after: 14,811

SEC source: 0001127602-18-013875 · form4.xml · nonDerivative · entry 3

BROWN ARCHIE M JR · CIK 0001214961 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · Restricted

Disclosed balance after: 14,811

SEC source: 0001127602-18-013790 · form4.xml · nonDerivative · entry 6

ANDERSON JAMES M · CIK 0001250579 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · Restricted-P

Disclosed balance after: 1,560

SEC source: 0001127602-18-013790 · form4.xml · nonDerivative · entry 5

ANDERSON JAMES M · CIK 0001250579 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · Restricted Stock

Disclosed balance after: 4,680

SEC source: 0001127602-18-013878 · form4.xml · nonDerivative · entry 2

Woods Karen B · CIK 0001662727 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Indirect · By 401k

Disclosed balance after: 622

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013878 · form4.xml · nonDerivative · entry 1

Woods Karen B · CIK 0001662727 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,828

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013877 · form4.xml · nonDerivative · entry 3

OBRIEN THOMAS MURRAY · CIK 0001484855 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse's Revocable Trust

Disclosed balance after: 25,227

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013877 · form4.xml · nonDerivative · entry 2

OBRIEN THOMAS MURRAY · CIK 0001484855 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Revocable Trust

Disclosed balance after: 36,285

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013877 · form4.xml · nonDerivative · entry 1

OBRIEN THOMAS MURRAY · CIK 0001484855 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,435

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013876 · form4.xml · nonDerivative · entry 1

Hoeflinger Erin · CIK 0001653488 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,023

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013875 · form4.xml · derivative · entry 5

BROWN ARCHIE M JR · CIK 0001214961 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,273

Underlying: Common Stock · 14,273 shares

Expires 2024-02-03

F2 · price: Received in the Merger in exchange for an employee stock option to acquire 10,287 shares of MainSource common stock for $11.59 per share.

SEC source: 0001127602-18-013875 · form4.xml · nonDerivative · entry 2

BROWN ARCHIE M JR · CIK 0001214961 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By 401k

Disclosed balance after: 38,962

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013875 · form4.xml · nonDerivative · entry 1

BROWN ARCHIE M JR · CIK 0001214961 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 87,259

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013874 · form4.xml · nonDerivative · entry 2

Berta Vince · CIK 0001667712 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Revocable Trust

Disclosed balance after: 3,549

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013874 · form4.xml · nonDerivative · entry 1

Berta Vince · CIK 0001667712 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,786

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013873 · form4.xml · nonDerivative · entry 4

BARRON WILLIAM G · CIK 0001256237 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Generation Skipping Trust

Disclosed balance after: 112,602

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013873 · form4.xml · nonDerivative · entry 3

BARRON WILLIAM G · CIK 0001256237 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Spouse IRA

Disclosed balance after: 72,498

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013873 · form4.xml · nonDerivative · entry 2

BARRON WILLIAM G · CIK 0001256237 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Family Trust

Disclosed balance after: 562,151

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013873 · form4.xml · nonDerivative · entry 1

BARRON WILLIAM G · CIK 0001256237 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 71,966.605

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013872 · form4.xml · nonDerivative · entry 1

Bardwell Kathleen · CIK 0001532367 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,187

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013790 · form4.xml · derivative · entry 8

ANDERSON JAMES M · CIK 0001250579 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,225

Underlying: Common Stock · 5,225 shares

Expires 2024-02-03

F3 · price: Received in the Merger in exchange for an employee stock option to acquire 10,287 shares of MainSource common stock for $11.59 per share.

SEC source: 0001127602-18-013790 · form4.xml · derivative · entry 7

ANDERSON JAMES M · CIK 0001250579 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,560

Underlying: Common Stock · 3,560 shares

Expires 2023-04-10

F2 · price: Received in the Merger in exchange for an employee stock option to acquire 2566 shares of MainSource common stock for $9.86 per share

SEC source: 0001127602-18-013790 · form4.xml · nonDerivative · entry 4

ANDERSON JAMES M · CIK 0001250579 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · As UTMA Custodian for Son

Disclosed balance after: 592

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013790 · form4.xml · nonDerivative · entry 3

ANDERSON JAMES M · CIK 0001250579 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · As UTMA Custodian for Daughter

Disclosed balance after: 405

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013790 · form4.xml · nonDerivative · entry 2

ANDERSON JAMES M · CIK 0001250579 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By 401-K

Disclosed balance after: 15,841

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-013790 · form4.xml · nonDerivative · entry 1

ANDERSON JAMES M · CIK 0001250579 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,691

F1 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-014176 · form4a.xml · nonDerivative · entry 1

Woods Karen B · CIK 0001662727 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,428

F1 · shares: Due to an error in the calculation of common shares directly held by the reporting person, the Form 4 filed on 4/3/2018 incorrectly stated the number of common shares of FFBC stock acquired by the reporting person as a result of the merger of First Financial Bancorp and MainSource Financial Group which closed on 4/1/2018. The number of shares was originally reported as 14,828, and should have been reported as 9,428.

F2 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-014175 · form4a.xml · derivative · entry 2

BROWN ARCHIE M JR · CIK 0001214961 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,273

Underlying: Common Stock · 14,273 shares

Expires 2024-02-03

F3 · security: Form 4 filed on 4/3/2018 included incorrect information in the footnote related to this acquisition of shares. The footnote has been updated to reflect the correct information related to the acquisition.

F4 · price: Received in the Merger in exchange for an employee stock option to acquire 10,287 shares of MainSource common stock for $16.08 per share.

SEC source: 0001127602-18-014175 · form4a.xml · nonDerivative · entry 1

BROWN ARCHIE M JR · CIK 0001214961 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 77,960

F1 · shares: Due to an error in the calculation of common shares directly held by the reporting person, the Form 4 filed on 4/3/2018 incorrectly stated the number of common shares of FFBC stock acquired by the reporting person as a result of the merger of First Financial Bancorp and MainSource Financial Group which closed on 4/1/2018. The number of shares was originally reported as 87,259, and should have been reported as 77,960.

F2 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-014174 · form4a.xml · derivative · entry 3

ANDERSON JAMES M · CIK 0001250579 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,225

Underlying: Common Stock · 5,225 shares

Expires 2024-02-03

F3 · security: Form 4 filed on 4/3/2018 included incorrect information in the footnote related to this acquisition of shares. The footnote has been updated to reflect the correct information related to the acquisition.

F5 · price: Received in the Merger in exchange for an employee stock option to acquire 3,766 shares of MainSource common stock for $16.08 per share.

SEC source: 0001127602-18-014174 · form4a.xml · derivative · entry 2

ANDERSON JAMES M · CIK 0001250579 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,560

Underlying: Common Stock · 3,560 shares

Expires 2023-04-10

F3 · security: Form 4 filed on 4/3/2018 included incorrect information in the footnote related to this acquisition of shares. The footnote has been updated to reflect the correct information related to the acquisition.

F4 · price: Received in the Merger in exchange for an employee stock option to acquire 2,566 shares of MainSource common stock for $13.67 per share.

SEC source: 0001127602-18-014174 · form4a.xml · nonDerivative · entry 1

ANDERSON JAMES M · CIK 0001250579 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,922

F1 · shares: Due to an error in the calculation of common shares directly held by the reporting person, the Form 4 filed on 4/3/2018 incorrectly stated the number of common shares of FFBC stock acquired by the reporting person as a result of the merger of First Financial Bancorp and MainSource Financial Group which closed on 4/1/2018. The number of shares was originally reported as 33,691, and should have been reported as 29,922.

F2 · price: Received pursuant to the merger agreement between First Financial Bancorp. ("First Financial") and MainSource Financial Group, Inc. ("MainSource"), dated July 25, 2017 (the "Merger Agreement"), pursuant to which MainSource was merged with and into First Financial on April 1, 2018 (the "Effective Time"). Pursuant to the Merger Agreement, as of the Effective Time, (i) each issued and outstanding share of MainSource's common stock converted into the right to receive 1.3875 shares of First Financial common stock and cash in lieu of fractional shares (the "Merger Consideration"), and (ii) each outstanding restricted share and each outstanding performance share unit fully vested and was cancelled and converted automatically into the right to receive the Merger Consideration in respect of each share of MainSource's common stock underlying such award, less applicable tax withholdings. On the trading day immediately preceding Effective Date, the closing price of MainSource's common stock was $40.65 per share and the closing price of First Financial's common stock was $29.35 per share.

SEC source: 0001127602-18-011405 · form4.xml · nonDerivative · entry 4

stollings anthony m · CIK 0001191489 · President & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,705

F4 · shares: Vesting of restricted performance share award less shares withheld for taxes and shares cancelled (award paid out at 94.43%).

SEC source: 0001127602-18-011405 · form4.xml · nonDerivative · entry 3

stollings anthony m · CIK 0001191489 · President & COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Restricted-P

Disclosed balance after: 6,365

F3 · shares: Vesting of Performance-Based Restricted Stock Award.