Investor Information

Transfer, Registrar and Dividend Disbursing Agent

American Stock Transfer & Trust Company
Telephone Inquiries: 800.937.5449 or 718.921.8200
Email address: info@amstock.com
Website address: www.amstock.com

Address Shareowners’ Inquiries to and Send Certificates for Transfer and Address Changes to:

American Stock Transfer & Trust Company
59 Maiden Lane
New York, NY 10038

Annual Meeting Date

UIL Holdings Corporation’s Annual Meeting will be held at 10:00 a.m. on Wednesday, May 14, 2008 at Quinnipiac University
275 Mount Carmel Avenue, Hamden, CT.

Dividend Reinvestment & Direct Stock Purchase and Sale Plan

Investors interested in obtaining information regarding the benefits of participating in Investors Choice, a Dividend Reinvestment & Direct Stock Purchase and Sale Plan for UIL Holdings Corporation’s common stock, may write to:

American Stock Transfer & Trust Company
59 Maiden Lane
New York, NY 10038

Investor Relations Hotline

For information on UIL’s earnings, news
releases, media articles and dividend
information, call:
From within the New Haven area: 203.499.3333 or
From outside the New Haven area:
800.7-CALL UI (722.5584)

Analyst Contact

Susan E. Allen
Telephone: 203.499.2409
Email address: UIL@uinet.com
UIL Holdings Corporation
P.O. Box 1564
New Haven, CT 06506-0901
Fax: 203.499.2414

Stock Listing

New York Stock Exchange; Common Stock (UIL)

Independent Registered
Public Accounting Firm

PricewaterhouseCoopers LLP
125 High Street
Boston, MA 02110
Telephone: 617.530.5000