Overview

Atlantic Power is a leading publicly traded, power generation and infrastructure company with a well-diversified portfolio of assets in the United States and Canada. The Company's power generation projects sell electricity to utilities and other large commercial customers under long-term PPAs, which seek to minimize exposure to changes in commodity prices.

Its power generation projects in operation have an aggregate gross electric generation capacity of approximately 2,945 MW in which its aggregate ownership interest is approximately 2,024 MW. Its current portfolio consists of interests in twenty-nine operational power generation projects across eleven states in the United States and two provinces in Canada.

Atlantic Power trades on the New York Stock Exchange under the symbol AT and on the Toronto Stock Exchange under the symbol ATP.

Listed Securities:

Common shares

Dividends on common shares are paid monthly. Shareholders can elect to have their distributions paid in Canadian dollars or the equivalent U.S. funds.

TSX Ticker Symbol: ATP
NYSE Ticker Symbol: AT
Shares Issued & Outstanding: 120,712,916

6.50% Convertible Subordinated Debentures

The Debentures pay interest semi-annually on April 30 and October 31 each year. The Debentures mature on October 31, 2014 and are convertible into 80.6452 common shares per Cdn$1,000 principal amount of Debentures, at any time, at the option of the holder, representing a conversion price of Cdn$12.40 per common share.

Ticker Symbol: ATP.DB-T
Principal Amount Outstanding: Cdn$44.8 million
Exchange: TSX

6.25% Convertible Subordinated Debentures

The 6.25% Convertible Subordinated Debentures were issued on December 17, 2009. The Debentures pay interest semi-annually on March 15 and September 15 each year. The Debentures mature on March 15, 2017 and are convertible into 76.9231 common shares per Cdn$1,000 principal amount of Debentures, at any time, at the option of the holder, representing a conversion price of Cdn$13.00 per common share.

Ticker Symbol: ATP.DB.A-T
Principal Amount Outstanding: Cdn$67.4 million
Exchange: TSX

5.60% Convertible Subordinated Notes

The debentures pay interest semi-annually on June 30 and December 31 each year. The Debentures mature on June 30, 2017 and are convertible into 55.2486 common shares per Cdn$1,000 principal amount of Debentures, at any time, at the option of the holder, representing a conversion price of Cdn18.10 per common share.

Ticker Symbol: ATP.DB.B-T
Principal Amount Outstanding: Cdn$80.5 million
Exchange: TSX

5.75% Convertible Subordinated Debentures

The Debentures pay interest semi-annually on June 30 and December 31 each year. The Debentures mature on June 30, 2019 and are convertible into 57.9710 common shares per US$1,000 principal amount of Debentures, at any time, at the option of the holder, representing a conversion price of US$17.25 per common share.

Ticker Symbol: ATP.DB.U-T
Principal Amount Outstanding: US$130 million
Exchange: TSX

6.00% Series D Extendible Convertible Subordinated Debentures

The Debentures pay interest semi-annually on June 30 and December 31 each year. The Debentures mature on December 31, 2019 and are convertible into 68.9655 common shares per Cdn$1,000 principal amount of Debentures, at any time, at the option of the holder, representing a conversion price of Cdn$14.50 per common share. (Please see Prospectus Supplement dated December 3, 2012 for details on the initial maturity date and other conditions of these Series D Extendible Convertible Subordinated Debentures.)

Ticker Symbol: ATP.DB.D-T
Principal Amount Outstanding: Cdn$100 million
Exchange: TSX

Transfer Agent:

Computershare Investor Services, Inc
100 University Avenue
Toronto, ON M5J 2Y1

Legal Counsel:
Goodmans LLP
Bay Adelaide Centre
333 Bay Street, Suite 3400
Toronto, ON M5H 2S7 CANADA

Cleary Gottlieb
One Liberty Plaza
New York, NY 10006

Auditor:
KPMG LLP
345 Park Avenue
New York, NY 10154 USA

Our Office Locations:
Boston (Headquarters):
1 Federal St., FL 30
Boston, MA 02110
617-977-2400
617-977-2700 (Investor Relations)
Info@atlanticpower.com

EMERGENCY HOTLINE
To report an emergency at one of our facilities,
please call: 617-977-8588

Chicago:
3250 Lacey Road
Downers Grove, IL 60515 USA
630-427-6300

Toronto:
1620 123 Front Street West
Toronto, ON M5J 2M2 CANADA
416-773-7400

San Diego:
8835 Balboa Avenue, Ste. D
San Diego, CA 92123
858-492-5460

Seattle:
123 NW 36th St., Suite 210
Seattle, WA 98107
425-455-9014