THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

UIL Holdings Corporation (UIL)

4/6/2006 Proxy Information

Under a lease agreement dated May 7, 1991, one of UIL HoldingsÕ direct subsidiaries, The United Illuminating Company (UI), leased its corporate headquarters offices in New Haven from 157 Church Street, LLC, which is controlled by Arnold L. Chase, a Director and shareowner of UIL Holdings (for further details see the Principal Shareowners disclosure above), and members of his immediate family. During 2005, UIÕs lease payments to 157 Church Street, LLC totaled $9.5 million.

4/7/2005 Proxy Information

Under a lease agreement dated May 7, 1991, one of UIL HoldingsÕ direct subsidiaries, The United Illuminating Company (UI), leased its corporate headquarters offices in New Haven from 157 Church Street, LLC, which is controlled by Arnold L. Chase, a Director and shareowner of UIL Holdings (for further details see the Principal Shareowners disclosure above), and members of his immediate family. During 2004, UIÕs lease payments to 157 Church Street, LLC totaled $9.4 million.

A subsidiary of UIL Holdings Corporation, United Capital Investments, Inc. (UCI), invested a total of $3.9 million in 2000 and 2001 to purchase a minority ownership interest in Gemini Networks, Inc. (Gemini). Gemini proposes to develop, build, and operate an open-access, hybrid fiber coaxial communications network serving business and residential customers in the Northeastern United States. Gemini is a corporation controlled by the David T. Chase family, and Arnold L. Chase is the President and a Director of Gemini. In June 2002, UCI wrote down its investment in Gemini to one dollar, because the telecommunications sector had suffered substantial losses in value, and because UCI concluded that Gemini was unlikely to continue its network development in the absence of additional financing. In December 2003, Gemini completed a restructuring transaction in connection with which the Chase family came to own 100% of the equity of Gemini. In connection with that transaction, UCI received a cash payment in May 2004 of approximately $17,500 in exchange for its ownership interest in Gemini.

4/8/2004 Proxy Information

Arnold L. Chase is President of Gemini Networks, Inc. (an open-access, hybrid fiber coaxial communications network provider). Under a lease agreement dated May 7, 1991, one of UIL Holdings' direct subsidiaries, The United Illuminating Company (UI), leased its corporate headquarters offices in New Haven from 157 Church Street, LLC, which is controlled by Arnold L. Chase and members of his immediate family. During 2003, UI's lease payments to the partnership totaled $8.7 million.

A subsidiary of United Resources, Inc., United Capital Investments, Inc. (UCI), invested a total of $3.9 million in 2000 and 2001 to purchase a minority ownership interest in Gemini Networks, Inc. (Gemini). Gemini proposes to develop, build, and operate an open-access, hybrid fiber coaxial communications network serving business and residential customers in the Northeastern United States. Gemini is a corporation controlled by the David T. Chase family, and Arnold L. Chase is the President and a Director of Gemini. In June 2002, UCI wrote down its investment in Gemini to one dollar, because the telecommunications sector had suffered substantial losses in value, and because UCI concluded that Gemini was unlikely to continue its network development in the absence of additional financing. In December 2003, Gemini completed a restructuring transaction in connection with which the Chase family came to own 100% of the equity of Gemini. In connection with that transaction, UCI is entitled to a cash payment of approximately $17,500 in exchange for its ownership interest in Gemini, and expects to receive that amount in the second quarter of 2004.

4/4/2003 Proxy Information

Under a lease agreement dated May 7, 1991, one of UIL Holdings' direct subsidiaries, The United Illuminating Company (UI), leased its corporate headquarters offices in New Haven from Connecticut Financial Center Associates Limited Partnership, which is controlled by Arnold L. Chase and members of his immediate family. During 2002, UI's lease payments to the partnership totaled $7.6 million. Also, A subsidiary of United Resources, Inc., United Capital Investments, Inc. (UCI), invested $3.9 million in 2000 and 2001 to purchase a minority ownership interest in Gemini Networks, Inc. (Gemini). Gemini proposes to develop, build, and operate an open-access, hybrid fiber coaxial communications network serving business and residential customers in the northeastern United States. Gemini is a corporation controlled by the David T. Chase family, and Arnold L. Chase is the President and a Director of Gemini. In June 2002, UCI wrote its investment in Gemini down to one dollar, because the telecommunications sector had suffered substantial losses in value, and because UCI concluded that Gemini was unlikely to continue its network development in the absence of additional financing.