THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

First Financial Bancorp. (FFBC)

3/22/2006 Proxy Information

Compensation Committee Insider Participation

Murph Knapke, a director of the Corporation and a former member of the Compensation Committee, is a partner of Knapke Law Office, which provided real estate title services for First Financial Bank, N.A. customers during the prior fiscal year and proposes to provide such services in the current fiscal year. The fees paid by the bank’s customers for these services in the last fiscal year were $29,135. The Board of Directors has determined that these payments, which are below the applicable limits established by the rules of the NASD, do not affect Mr. Knapke’s status as an independent director.

Other Business Relationships

Corinne R. Finnerty, a director of the Corporation, is the sole shareholder and an officer of Corinne R. Finnerty, P.C. d/b/a McConnell & Finnerty, which has been retained by First Financial Bank, N.A. and previous Corporation bank subsidiaries during the prior fiscal year and the current fiscal year. During the prior fiscal year, the Corporation’s subsidiaries paid McConnell & Finnerty $49,334 in legal fees. The Board of Directors has determined that these payments, which are below the applicable limits established by the rules of the NASD, do not affect Ms. Finnerty’s status as an independent director.

Steven C. Posey, a director of the Corporation, has a 19% interest as a limited partner in Midd West Development LTD, from which First Financial Bank, N.A. rented retail office space during the prior fiscal year and proposes to continue to rent such space in the current fiscal year. The total rent paid during the last fiscal year was $74,220. The Board of Directors has determined that these payments, which are below the applicable limits established by the rules of the NASD, do not affect Mr. Posey’s status as an independent director.

Richard E. Olszewski, a director of the Corporation, operates a 7-Eleven franchise at which a First Financial Bank ATM is located. The 7-Eleven franchise received $1,500 in fees from the bank in 2005. The Board of Directors has determined that these payments, which are below the applicable limits established by the rules of the NASD, do not affect Mr. Olszewski’s status as an independent director.

Murph Knapke, a director of the Corporation, is a partner of Knapke Law Office, Celina, Ohio. Mr. Knapke’s law firm provides real estate title searches for First Financial Bank, N.A. customers. The firm received $29,135 in fees from customers of the First Financial Bank, N.A. in 2005. The Board of Directors has determined that these payments, which are below the applicable limits estimated by the rules of the NASD, do not affect Mr. Knapke’s status as an independent director.

Indebtedness of Management

Some of the officers and directors of the Corporation and the companies with which they are associated were customers of the banking subsidiaries of the Corporation. The loans to such officers and directors and the companies with which they are associated (a) were made in the ordinary course of business, (b) were made on substantially the same terms, including interest and nature of collateral, as those prevailing at the time for comparable transactions with other persons, and (c) did not involve more than the normal risk of collectibility or present other unfavorable features.

The bank subsidiaries of the Corporation have had, and expect to have in the future, banking transactions in the ordinary course of business with directors, officers, principal shareholders and their associates on the same terms, including interest rates and collateral on loans, as those prevailing at the same time for comparable transactions with others.

3/18/2005 Proxy Information

Murph Knapke, a director of the Corporation and a member of the Compensation Committee, is a partner of Knapke Law Office, which provided real estate title services for Community First Bank & Trust during the prior fiscal year and proposes to provide such services in the current fiscal year. The fees paid for these services in the last fiscal year were $30,540. The Board of Directors has determined that these payments, which are below the applicable limits established by the rules of the NASD, do not affect Mr. Knapke’s status as an independent director.

Other Business Relationships

Two directors of the Corporation are members of law firms that provide legal services to subsidiaries of the Corporation. Corinne R. Finnerty is the sole shareholder and an officer of Corinne R. Finnerty, P.C. d/b/a McConnell & Finnerty, which has been retained by Heritage Community Bank and First Financial Bank during the prior fiscal year and the current fiscal year. During the prior fiscal year, the Corporation’s subsidiaries paid McConnell & Finnerty $70,814 in legal fees. The Board of Directors has determined that these payments, which are below the applicable limits established by the rules of the NASD, do not affect Ms. Finnerty’s status as an independent director. Stephen S. Marcum is a member of the law firm of Parrish, Fryman & Marcum Co., LPA, which has been retained by First Financial Bank during the prior fiscal year and the current fiscal year. During the prior fiscal year, First Financial Bank paid Parrish, Fryman & Marcum Co., LPA $291,711 in legal fees. The Board of Directors has determined that the payments to Mr. Marcum exceed the applicable limits established by the rules of the NASD and, therefore, Mr. Marcum is not an independent director.

Steven C. Posey, a director of the Corporation, has a 19% interest as a limited partner in Midd West Development LTD, from which First Financial Bank rented retail office space during the prior fiscal year and proposes to continue to rent such space in the current fiscal year. The total rent paid during the last fiscal year exceeded $60,000. The Board of Directors has determined that these payments, which are below the applicable limits established by the rules of the NASD, do not affect Mr. Posey’s status as an independent director.

Donald M. Cisle, a director of the Corporation, is the owner of Don S. Cisle Contractor, Inc., which provided construction services to First Financial Bank during the prior fiscal year. The amount billed for construction services provided during the prior fiscal year was $200,793. The Board of Directors has determined that payments to the construction firm, which are below the applicable limits established by the rules of the NASD, do not affect Mr. Cisle’s status as an independent director.

3/15/2004 Proxy Information

Bruce E. Leep is the Chairman and former CEO of Sand Ridge Bank, a wholly-owned subsidiary of First Financial Bancorp.

Murph Knapke, a director of the Corporation and a member of the Compensation Committee, is a partner of Knapke Law Office, which provided real estate title services for Community First Bank & Trust during the prior fiscal year and proposes to provide such services in the current fiscal year. The fees paid for these services in the last fiscal year exceeded $60,000. The Board of Directors has determined that these payments, which are below the applicable limits established by the rules of the NASD, do not affect Mr. Knapke’s status as an independent director

Two directors of the Corporation are members of law firms that provide legal services to subsidiaries of the Corporation. Corinne R. Finnerty is the sole shareholder and an officer of Corinne R. Finnerty, P.C. d/b/a McConnell & Finnerty, which has been retained by Heritage Community Bank and First Financial Bank during the prior fiscal year and the current fiscal year. During the prior fiscal year, the Corporation’s subsidiaries paid McConnell & Finnerty $94,060 in legal fees. The Board of Directors has determined that these payments, which are below the applicable limits established by the rules of the NASD, do not affect Ms. Finnerty’s status as an independent director. Stephen S. Marcum is a member of the law firm of Parrish, Fryman & Marcum Co., LPA, which has been retained by First Financial Bank, Heritage Community Bank and the First Financial Bancorp Service Corp. during the prior fiscal year and the current fiscal year. During the prior fiscal year, the Corporation’s subsidiaries paid Parrish, Fryman & Marcum Co., LPA $221,619 in legal fees. The Board of Directors has determined that the payments to Mr. Marcum exceed the applicable limits established by the rules of the NASD and, therefore, Mr. Marcum is not an independent director.

Steven C. Posey, a director of the Corporation, has a 19% interest as a limited partner in Midd West Development LTD, from which First Financial Bank rented retail office space during the prior fiscal year and proposes to continue to rent such space in the current fiscal year. The total rent paid during the last fiscal year exceeded $60,000. The Board of Directors has determined that these payments, which are below the applicable limits established by the rules of the NASD, do not affect Mr. Posey’s status as an independent director.

3/26/2003 Proxy Information

Some of the officers and directors of the Corporation and the companies with which they are associated were customers of the banking subsidiaries of the Corporation. The loans to such officers and directors and the companies with which they are associated (a) were made in the ordinary course of business, (b) were made on substantially the same terms, including interest and nature of collateral, as those prevailing at the time for comparable transactions with other persons, and (c) did not involve more than the normal risk of collectibility or present other unfavorable features.

The subsidiaries of the Corporation have had, and expect to have in the future, banking transactions in the ordinary course of business with directors, officers, principal shareholders and their associates on the same terms, including interest rates and collateral on loans, as those prevailing at the same time for comparable transactions with others.

Two directors of the Corporation are members of law firms that provide legal services to subsidiaries of the Corporation. Corinne R. Finnerty is a partner in the law firm of McConnell & Finnerty, which has been retained by Heritage Community Bank and First Financial Bank during the prior fiscal year and the current fiscal year. During the prior fiscal year, the Corporation’s subsidiaries paid McConnell & Finnerty $70,770 in legal fees. Stephen S. Marcum is a member of the law firm of Parrish, Fryman & Marcum Co., LPA, which has been retained by First Financial Bank during the prior fiscal year and the current fiscal year. During the prior fiscal year, First Financial Bank paid Parrish, Fryman & Marcum Co., LPA $209,891 in legal fee