Pattern Energy Announces Closing of Over-Allotment Option for Class A Common Stock

SAN FRANCISCO, Aug. 22, 2016

The Company intends to use the net proceeds from the Equity Offering, including the net proceeds of the over-allotment option, to fund potential acquisition opportunities from Pattern Energy Group LP and repay its revolving credit facility.

The Equity Offering was made through an underwriting group led by RBC Capital Markets, BMO Capital Markets and Morgan Stanley, as joint book-running managers of the Equity Offering and as representatives of the underwriters.

The offering of securities to which this communication relates has been made in the United States pursuant to an effective shelf registration statement (including a prospectus) filed with the Securities and Exchange Commission (the "SEC") and, in Canada, pursuant to a supplement to the Company's MJDS shelf prospectus filed with Canadian securities regulatory authorities. You can get copies of these documents for free by visiting EDGAR on the SEC website at www.sec.gov and SEDAR at www.sedar.com. Alternatively, copies of these documents may be obtained, from RBC Capital Markets, Attn: Equity Syndicate, 200 Vesey Street, 8th Floor, New York, NY 10281, by telephone at (877) 822-4089 or by email at equityprospectus@rbccm.com; BMO Capital Markets, Attn: Equity Syndicate Department, 3 Times Square, New York, NY 10036, by telephone at (800) 414-3627 or by email at bmoprospectus@bmo.com; or Morgan Stanley, Attn: Prospectus Department, 180 Varick Street, 2nd Floor, New York, NY 10014.

This press release shall not constitute an offer to sell or a solicitation of an offer to buy, nor will there be any sale of these securities in any state or jurisdiction in which such an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

About Pattern Energy

Pattern Energy Group Inc. is an independent power company listed on the NASDAQ Global Select Market and Toronto Stock Exchange. Pattern Energy has a portfolio of 17 wind power facilities, including one it has committed to acquire, with a total owned interest of 2,554 MW in the United States, Canada and Chile that use proven, best-in-class technology. Pattern Energy's wind power facilities generate stable, long-term cash flows in attractive markets and provide a solid foundation for the continued growth of the business.