THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

Boston Scientific Corporation (BSX)

4/10/2006 Proxy Information

Mr. Nicholas, a co-founder of Boston Scientific Corporation, and has been Chairman since 1995. He served as Chief Executive Officer from 1979 to March 1999 and co-Chairman from 1979 to 1995

Mr. Abele is a co-founder and former executive of the Boston Scientific Corporation.

Peter M. Nicholas and N. J. Nicholas, Jr. are brothers.

During 2005, we made payments of approximately $550,000 to Marsh & McLennan Companies, Inc. for insurance brokerage services. Our director, Ray J. Groves, was affiliated with Marsh & McLennan in 2005 until his retirement as a senior advisor to that company on July 31, 2005.

During 2005, we made payments of approximately $118,000 to Arnold & Porter LLP, a law firm of which the brother of Paul W. Sandman, our General Counsel, was the managing partner.

Several of our directors are affiliated with Duke University. Joel L. Fleishman has been employed by Duke University since 1971 and is currently a Professor of Law and Public Policy there. Ernest Mario is a Trustee of Duke University and Chairman of the Board of the Duke University Health System. Pete M. Nicholas received his B.A. degree from Duke University and is Chairman Emeritus of the Board of Trustees of Duke University. Uwe E. Reinhardt is a Trustee of Duke University and the Duke University Health System. Kristina M. Johnson is the Dean of the Pratt School of Engineering at Duke University. We also conduct business in the ordinary course with the medical center and other healthcare facilities at Duke University.

Nancy-Ann DeParle is a Senior Advisor to JP Morgan Partners, LLC, the private equity division of JP Morgan Chase & Co. JP Morgan Securities Inc., an indirect wholly owned subsidiary of JP Morgan Chase & Co., acted as a financial advisor to Guidant in connection with the Company’s acquisition of Guidant and as a financial advisor to the Company in connection with several of our credit facilities and public debt offerings. During 2005, we made payments of approximately $1.5 million to JP Morgan Securities, Inc. In March 2005, JP Morgan announced that JP Morgan Partners, LLC, will become independent from its parent company when it completes the investment of its current fund.

From time to time, our directors or executive officers may invest in venture funds in which we are also an investor. These venture funds are generally managed by unaffiliated third parties. Our decisions, and the decisions of our directors and officers, to invest in these ventures are made independently of each other.

4/4/2005 Proxy Information

During 2004, we made payments of approximately $600,000 to Marsh & McLennan Companies, Inc. for insurance brokerage services, a company with which our director, Ray J. Groves, is affiliated. In addition, we made payments of approximately $104,000 during 2004 to Arnold & Partner LLP, a law firm in which Paul W. Sandman’s brother is the managing partner.

Several of our directors are affiliated with Duke University. Joel L. Fleishman has been employed by Duke University since 1971 and is currently a Professor of Law and Public Policy. Ernest Mario is a Trustee of Duke University and Chairman of the Board of the Duke University Health System. Peter M. Nicholas received his B.A. degree from Duke University and is Chairman of the Board of Trustees of Duke University and a member of the Board’s Executive Committee. Uwe E. Reinhardt is a Trustee of Duke University and the Duke University Health System. In addition, we do business in the ordinary course with the medical center and other healthcare facilities at Duke University.

From time to time, our directors or executive officers may invest in venture funds in which we are also an investor. These venture funds are generally managed by unaffiliated third parties. Our decisions, and the decisions of our directors and executive officers, to invest in these ventures are made independently of each other.

Peter M. Nicholas and N. J. Nichoas, Jr. are brothers.

4/9/2004 Proxy Information

John E. Abele is a co-founder and former executive of the Boston Scientific Corporation.

Joseph A. Ciffolillo joined Boston Scientific Corporation in 1983 as President of Medi-tech, Inc. During his tenure at Boston Scientific, he also served as President of Microvasive, Inc. and as Executive Vice President and Chief Operating Officer from 1989 until his retirement in 1996.

During 2003, the Company made payments of approximately $600,000 to Marsh & McLennan Companies, Inc. for insurance brokerage services, a company of which Mr. Ray Groves is affiliated.

Peter M. Nicholas and N. J. Nichoas, Jr. are brothers.

4/4/2003 Proxy Information

Peter M. Nicholas and N. J. Nichoas, Jr. are brothers.

In light of the global nature of the Company’s business and current air travel security issues, the Company completed, in January 2002, the acquisition of an aircraft for $19,362,500. The aircraft was previously owned by the Company’s Chairman of the Board. The transaction closed in the first quarter of 2002. The purchase price was based on a third party, independent appraisal, which the Company believes is at a value consistent with an arm’s-length transaction. The Company currently operates the aircraft out of an airport hangar which is affiliated with the Chairman. The Company does not pay rent for the hangar space.

The Company has business arrangements with MedSource Technologies, Inc., a supplier and manufacturer of medical device components and products, of which Mr. Ciffolillo is a director. Amounts paid by the Company to MedSource during 2002 were approximately $14 million.

The Company also has arrangements in the ordinary course of business with Marsh & McLennan Companies, Inc. with which Mr. Ray Groves is affiliated. Amounts paid to Marsh & McLennan Companies, Inc. for insurance brokerage services during 2002 were less than $465,000.