THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

S&T Bancorp, Inc. (STBA)

3/1/2006 Proxy Information

Director Todd D. Brice is the son of Director Thomas A. Brice.

S&T Bank has made, and expects to make in the future, extensions of credit in the ordinary course of business to certain directors and officers. These loans are made on substantially the same terms, including interest rates, collateral and repayment terms, as those prevailing at the same time for comparable transactions with others. Such loans do not involve more than normal risk of collectability or present unfavorable features.

On January 31, 1992, S&T Bank entered into a limited partnership arrangement with RCL Partners, Inc. for the construction of 30 apartments in Indiana, Pennsylvania targeted for senior citizens. Total investment by S&T Bank was $1,761,766 and entitled S&T Bank to certain tax credits, tax depreciation benefits and a share of cash flows under the Internal Revenue Service’s Section 42 program. Director Delaney (and affiliated parties) and Director Gatti (and affiliated parties) each hold a one-third interest in RCL Partners, Inc.

During 2005, S&T Bank made payments of $480,205 to Director Olson, and affiliates, for the lease of operations, branch and administrative facilities. The details of the transactions with Director Olson are described in the paragraphs below.

On October 1, 1986, S&T Bank entered into an agreement to lease, from Director Olson and Michael Toretti as trustees under an irrevocable trust, a building and land used as S&T Bank’s North Fourth Street branch and operations center. The terms of the agreement provide for payment of $10,000 per month for the first five years and options to renew for four, five-year terms with rent for each option term to be the rent from the previous term, plus 5%. On October 1, 2001, S&T Bank exercised its third renewal option at $11,576 per month.

On August 1, 1992, S&T Bank entered into an agreement to lease from S.W. Jack Drilling Company, controlled by Director Olson, a building used for Trust Services and other executive offices. The terms of the agreement provide for monthly payments of $6,500 for three years and the option to lease additional space on the second floor with additional successive terms of three years each, with rent for each renewal option to be the rent from the previous term, plus 5%. On July 1, 1993, S&T Bank exercised the option for the second floor space at the S.W. Jack Building. On August 1, 2004, S&T Bank renegotiated the lease with a new, combined monthly rent of $16,835 through October 2006.

On July 1, 2000, S&T Bank entered into an agreement to lease from Director Olson and James H. McElwain as trustees under an irrevocable trust, the third floor space, storage rooms and underground parking spaces at the aforementioned S.W. Jack Building. The terms of the agreement provide for monthly payments of $7,388 for one year with additional four successive terms of three years each, with rent for each renewal option to be the rent from the previous term, plus 5%. On August 1, 2004, S&T Bank renegotiated the lease with a new, combined monthly rent of $8,145 through October 2006.

During 2005, S&T Bank made payments of $393,028 to a company owned by Director Thomas A. Brice for the purchase of furniture and other equipment.

During 2005, S&T Bank made payments for the purchase of goods and services from companies owned or controlled by Director Delaney for $61,836.

On May 4, 2001, S&T Insurance Group, LLC, and Attorneys Abstract Company, Inc. entered into an agreement to form S&T Settlement Services, LLC (“STSS”), with respective ownership interests of 55% and 45%. STSS is a title insurance agency serving commercial customers. S&T Bank owns a 100% interest in S&T Insurance Group, LLC; Director Papernick owns 66.67% of the stock of Attorneys Abstract Company, Inc., which received $120,607 in 2005 from its interest in STSS.

Director Papernick has a son who has a material interest in the law firm Papernick & Gefsky, LLC, which provided services to S&T Bank and received payments of $53,973 during 2005.

Director Thomas A. Brice has a son, Todd D. Brice, who is a director and is employed by S&T and S&T Bank and earned $291,000 in salary and bonuses in 2005, as disclosed in the Summary Compensation Table.

On December 1, 1997, S&T Bank entered into an agreement to lease from Director Sampson branch space and a freestanding drive-up teller and ATM facility located in a shopping plaza. The lease agreement provides for a ten-year term, annually adjusted for changes in the consumer price index, and a ten-year renewal option. The current monthly rent is $8,007.

During 2005, S&T Bank made payments of $163,072 for the purchase and maintenance of vehicles from a company owned by Director Spadafora and payments of $143,266 for the purchase of goods and services from companies owned or controlled by Director Donnelly.

3/15/2005 Proxy Information

S&T Bank has made, and expects to make in the future, extensions of credit in the ordinary course of business to certain directors and officers. These loans are made on substantially the same terms, including interest rates, collateral and repayment terms, as those prevailing at the same time for comparable transactions with others. Such loans do not involve more than normal risk of collectability or present unfavorable features.

On January 31, 1992, S&T Bank entered into a limited partnership arrangement with RCL Partners, Inc. for the construction of 30 apartments in Indiana, Pennsylvania targeted for senior citizens. Total investment by S&T Bank was $1,761,766 and entitled S&T Bank to certain tax credits, tax depreciation benefits and a share of cash flows under the Internal Revenue Service's Section 42 program. Director Delaney (and affiliated parties) and Director Gatti (and affiliated parties) each hold a one-third interest in RCL Partners, Inc.

During 2004, S&T Bank made payments of $297,531 to a company owned by Director Thomas A. Brice for the purchase of furniture and other equipment.

During 2004, S&T Bank made payments for the purchase of goods and services from companies owned or controlled by Directors Delaney and Donnelly for $247,836 and $138,950, respectively.

On May 4, 2001, S&T Insurance Group, LLC, and Attorneys Abstract Company, Inc. entered into an agreement to form S&T Settlement Services, LLC (STSS), with respective ownership interests of 55% and 45%. STSS is a title insurance agency serving commercial customers. S&T Bank owns a 100% interest in S&T Insurance Group, LLC; Director Papernick owns 66.67% of the stock of Attorneys Abstract Company, Inc., which received $120,008 in 2004 from its interest in STSS.

Director Papernick has a son who has a material interest in the law firm Papernick & Gefsky, LLC, which provided services to S&T Bank and received payments of $55,144 during 2004.

Director Thomas A. Brice has a son who is a director nominee, is employed by S&T and S&T Bank and earned $257,759 in salary and bonuses in 2004, as disclosed in the Summary Compensation Table.

Compensation Committee Interlocks and Insider Participation

Prior to the annual meeting of shareholders on April 19, 2004, the Compensation and Benefits Committee members were Samuel Levy (Chairman), William Gatti, Ruth Grant, Joseph Kirk and Christine Olson. On April 19, 2004, the S&T Board reorganized the Compensation and Benefits Committee and appointed the following directors as members: Samuel Levy (Chairman), Ruth Grant, Joseph Kirk, Myles Sampson and Charles Spadafora.

On December 1, 1997, S&T Bank entered into an agreement to lease from Director Sampson branch space and a freestanding drive-up teller and ATM facility located in a shopping plaza. The lease agreement provides for a ten-year term, annually adjusted for changes in the consumer price index, and a ten-year renewal option. The current monthly rent is $7,786.

During 2004, S&T Bank made payments of $466,412 to Director Olson, and affiliates, for the lease of operations, branch and administrative facilities. The details of the transactions with Director Olson are described in the paragraphs below.

On October 1, 1986, S&T Bank entered into an agreement to lease, from Director Olson and Michael Toretti as trustees under an irrevocable trust, a building and land used as S&T Bank's North Fourth Street branch and operations center. The terms of the agreement provide for payment of $10,000 per month for the first five years and options to renew for four, five-year terms with rent for each option term to be the rent from the previous term, plus 5%. On October 1, 2001, S&T Bank exercised its third renewal option at $11,576 per month.

On August 1, 1992, S&T Bank entered into an agreement to lease from S.W. Jack Drilling Company, controlled by Director Olson, a building used for Trust Services and other executive offices. The terms of the agreement provide for monthly payments of $6,500 for three years and the option to lease additional space on the second floor with additional successive terms of three years each, with rent for each renewal option to be the rent from the previous term, plus 5%. On July 1, 1993, S&T Bank exercised the option for the second floor space at the S.W. Jack Building. On August 1, 2004, S&T Bank renegotiated the lease with a new, combined monthly rent of $16,835 through October 2006.

On July 1, 2000, S&T Bank entered into an agreement to lease from Director Olson and James H. McElwain as trustees under an irrevocable trust, the third floor space, storage rooms and underground parking spaces at the aforementioned S.W. Jack Building. The terms of the agreement provide for monthly payments of $7,388 for one year with additional four successive terms of three years each, with rent for each renewal option to be the rent from the previous term, plus 5%. On August 1, 2004, S&T Bank renegotiated the lease with a new, combined monthly rent of $8,145 through October 2006.

During 2004, S&T Bank made payments of $66,713 for the purchase and maintenance of vehicles from a company owned by Director Spadafora.

In addition, S&T Bank may make extensions of credit to members of the Compensation and Benefits Committee in the ordinary course of business and on the same terms as available to others.

3/17/2004 Proxy Information

Director Nominee Brice has a son, Todd D. Brice, who has been employed by S&T Bank as a commercial loan officer since September 1985, and has been an executive vice president of S&T and S&T Bank since January 1, 2003.

S&T Bank has made, and expects to make in the future, extensions of credit in the ordinary course of business to certain directors and officers. These loans are made on substantially the same terms, including interest rates, collateral and repayment terms, as those prevailing at the same time for comparable transactions with others. Such loans do not involve more than normal risk of collectability or present unfavorable features.

On January 31, 1992, S&T Bank entered into a limited partnership arrangement with RCL Partners, Inc. for the construction of 30 apartments in Indiana, Pennsylvania targeted for senior citizens. Total investment by S&T Bank was $1,761,766 and entitled S&T Bank to certain tax credits, tax depreciation benefits and a share of cash flows under the Internal Revenue Service Section 42 program. Director Delaney (and affiliated parties) and Director Gatti (and affiliated parties) each hold a one-third interest in RCL Partners, Inc.

During 2002, S&T Bank made payments of $475,238 to Mr. Jack Toretti, and affiliates, for the lease of operations, branch and administrative facilities.

During 2003, S&T Bank made payments of $201,820 to a company owned by Director Brice for the purchase of furniture and other equipment

On December 1, 1997, S&T Bank entered into an agreement to lease from Director Sampson branch space and a freestanding drive-up teller and ATM facility located in a shopping plaza. The lease agreement provides for a ten-year term, annually adjusted for changes in the consumer price index, and a ten-year renewal option. The current monthly rent is $7,620.

During 2003, S&T Bank made payments for the purchase of goods and services from companies owned or controlled by Directors Delaney and Donnelly for $145,161 and $125,816, respectively.

On May 4, 2001, S&T Insurance Group, LLC, and Attorneys Abstract Company, Inc. entered into an agreement to form S&T Settlement Services, LLC (STSS), with respective ownership interests of 55% and 45%. STSS is a title insurance agency serving commercial customers. S&T Bank owns a 100% interest in S&T Insurance Group, LLC; Director Papernick owns 66.67% of the stock of Attorneys Abstract Company, Inc., which received $156,747 in 2003 from its interest in STSS.

Director Papernick has a son who has a material interest in the law firm Papernick & Gefsky, LLC, which provided legal services to S&T Bank and received payments of $68,218 during 2003.

Director Duggan has a daughter-in-law who is employed by S&T Bank and earned $88,115 in 2003. Director Brice has a son who is also employed by S&T Bank and earned $211,405 in salary and bonuses in 2003, as disclosed in the Summary Compensation Table.

On October 1, 1986, S&T Bank entered into an agreement to lease, from Director Olson and Michael Toretti as trustees under an irrevocable trust, a building and land used as S&T Bank's North Fourth Street branch and operations center. The terms of the agreement provide for payment of $10,000 per month for the first five years and options to renew for four, five-year terms with rent for each option term to be the rent from the previous term, plus 5%. On October 1, 2001, S&T Bank exercised its third renewal option at $11,576 per month.

On August 1, 1992, S&T Bank entered into an agreement to lease from S.W. Jack Drilling Company, controlled by Director Olson, a building used for Trust Services and other executive offices. The terms of the agreement provide for monthly payments of $6,500 for three years and the option to lease additional space on the second floor with additional successive terms of three years each, with rent for each renewal option to be the rent from the previous term, plus 5%. On July 1, 1993, S&T Bank exercised the option for the second floor space at the S.W. Jack Building. On August 1, 2001, S&T Bank exercised its third renewal option with a new, combined monthly rent of $16,033.

On July 1, 2000, S&T Bank entered into an agreement to lease from Director Olson and James H. McElwain as trustees under an irrevocable trust, the third floor space, storage rooms and underground parking spaces at the aforementioned S.W. Jack Building. The terms of the agreement provide for monthly payments of $7,388 for one year with additional four successive terms of three years each, with rent for each renewal option to be the rent from the previous term, plus 5%. On August 1, 2001, S&T Bank exercised its first renewal option at $7,757 per month.

3/19/2004 Proxy Information

Mr. Robert D. Duggan is Chairman and former CEO of S&T Bancorp, Inc.

On January 31, 1992, S&T Bank entered into a limited partnership arrangement with RCL Partners, Inc. for the construction of 30 apartments in Indiana, Pennsylvania targeted for senior citizens. Total investment by S&T Bank was $1,761,766 and entitled S&T Bank to certain tax credits, tax depreciation benefits and a share of cash flows under the Internal Revenue Service Section 42 program. Director Delaney (and affiliated parties) and Director Gatti (and affiliated parties) each hold a one-third interest in RCL Partners, Inc.

On December 1, 1997, S&T Bank entered into an agreement to lease from Director Sampson branch space and a freestanding drive-up teller and ATM facility located in a shopping plaza. The lease agreement provides for a ten-year term, annually adjusted for changes in the consumer price index, and a ten-year renewal option. The current monthly rent is $7,607.

During 2002, S&T Bank made payments for the purchase of goods and services from companies owned or controlled by Directors Delaney and Donnelly for $184,493 and $120,530, respectively.

On May 4, 2001, S&T Insurance Group, LLC, and Attorneys Abstract Company, Inc. entered into an agreement to form S&T Settlement Services, LLC (STSS), with respective ownership interests of 55% and 45%. STSS is a title insurance agency serving commercial customers. S&T Bank owns a 100% interest in S&T Insurance Group, LLC; Director Papernick owns 66.67% of the stock of Attorneys Abstract Company, Inc.

Director Papernick is president of the law firm Papernick & Gefsky, P.C., which provided legal services to S&T Bank and received payments of $68,516 during 2002.

During 2002, S&T Bank made payments of $183,183 to a company owned by Director Brice for the purchase of furniture and other equipment, and payments of $475,238 to Director Toretti, and affiliates, for the lease of operations, branch and administrative facilities. The details of the transactions with Director Toretti are described in the paragraphs that follow.

On October 1, 1986, S&T Bank entered into an agreement to lease, from Director Toretti and Michael Toretti as trustees under an irrevocable trust, a building and land used as S&T Bank's North Fourth Street branch and operations center. The terms of the agreement provide for payment of $10,000 per month for the first five years and options to renew for four, five-year terms with rent for each option term to be the rent from the previous term, plus 5%. On October 1, 2001, S&T Bank exercised its third renewal option at $11,576 per month.

On August 1, 1992, S&T Bank entered into an agreement to lease from S.W. Jack Drilling Company, controlled by Director Toretti, a building used for Trust Services and other executive offices. The terms of the agreement provide for monthly payments of $6,500 for three years and the option to lease additional space on the second floor with additional successive terms of three years each, with rent for each renewal option to be the rent from the previous term, plus 5%. On July 1, 1993, S&T Bank exercised the option for the second floor space at the S.W. Jack Building. On August 1, 2001, S&T Bank exercised its third renewal option with a new, combined monthly rent of $16,033.

On July 1, 2000, S&T Bank entered into an agreement to lease from Director Toretti and James H. McElwain as trustees under an irrevocable trust, the third floor space, storage rooms and underground parking spaces at the aforementioned S.W. Jack Building. The terms of the agreement provide for monthly payments of $7,388 for one year with additional four successive terms of three years each, with rent for each renewal option to be the rent from the previous term, plus 5%. On August 1, 2001, S&T Bank exercised its first renewal option at $7,757 per month.

country club and golf club dues are paid for Mr. Duggan, who, as the Chairman, is active in developing and retaining S&T's customer and business relationships. In 2002, these dues were $7,230.