On January 20, 2017, Pattern Energy Group Inc. and Pattern US Finance Company LLC, as guarantor (the "Guarantor"), entered into a purchase agreement with Morgan Stanley & Co. LLC acting as representative of the several initial purchasers named therein (collectively, the "Initial Purchasers"), relating to the previously announced issuance and sale of $350,000,000 aggregate principal amount of the Company's 5.875% Senior Notes due 2024 in an offering to qualified institutional buyers within the meaning of Rule 144A promulgated under the Securities Act of 1933, as amended (the Securities Act), and to certain non-U.S. persons outside the United States in reliance on Regulation S under the Securities Act. The Notes were issued pursuant to an indenture dated as of January 25, 2017 among the Company, the Guarantor and Deutsche Bank Trust Company Americas, as trustee (the Trustee). The Notes bear interest at a rate of 5.875% per annum from and including January 25, 2017, payable semiannually in arrears on February 1 and August 1 of each year, beginning on August 1, 2017. The Notes will mature on February 1, 2024, unless repurchased or redeemed in accordance with their terms prior to such date. The company has the option to redeem all or a portion of the Notes at any time on or after February 1, 2020 at the redemption prices specified in the Indenture, together with accrued and unpaid interest, if any, to the date of redemption. The Company has the option at any time prior to February 1, 2020, to redeem some or all of the Notes at a "make-whole" redemption price specified in the Indenture, together with accrued and unpaid interest, if any, to the date of redemption. In addition, the Company may redeem up to 35% of the aggregate principal amount of the Notes prior to February 1, 2020 under certain circumstances with the net cash proceeds of certain equity offerings at the redemption price specified in the Indenture, together with accrued and unpaid interest, if any, to the date of redemption.