15. STOCKHOLDERS' EQUITY
January 2015 Public Offering
On January 22, 2015, TerraForm Power sold 13,800,000 shares of its Class A common stock to the public in a registered offering including 1,800,000 shares sold pursuant to the underwriters' overallotment option. TerraForm Power received net proceeds of $390.6 million, which were used to purchase 13,800,000 Class A units of Terra LLC. Terra LLC used $50.9 million to repurchase 1,800,000 Class B units from SunEdison. Concurrent with this transaction, 1,800,000 shares of TerraForm Power Class B common stock were canceled.
June 2015 Public Offering
On June 24, 2015, TerraForm Power sold 18,112,500 shares of its Class A common stock to the public in a registered offering including 2,362,500 shares sold pursuant to the underwriters' overallotment option. TerraForm Power received net proceeds of $667.6 million, which were used to purchase 18,112,500 Class A units of Terra LLC. Terra LLC used $87.1 million to repurchase 2,362,500 Class B units from SunEdison. Concurrent with this transaction, 2,362,500 shares of TerraForm Power Class B common stock were canceled.
As of May 28, 2015, all outstanding Class B1 units in Terra LLC and all outstanding shares of Class B1 common stock of TerraForm Power held by R/C US Solar Investment Partnership, L.P. (“Riverstone”) had been converted into Class A units of Terra LLC held by TerraForm Power and shares of Class A common stock of TerraForm Power.
Reduction in SunEdison’s Ownership of Class B Shares
On January 22, 2016, TerraForm Power issued 12,161,844 shares of Class A common stock to affiliates of the D.E. Shaw group, Madison Dearborn Capital Partners IV, L.P. and Northwestern University, and Terra LLC issued 12,161,844 Class A units of Terra LLC to TerraForm Power upon conversion of 12,161,844 Class B shares of TerraForm Power common stock and 12,161,844 Class B units of Terra LLC held by SunEdison. After giving effect to the conversion, SunEdison indirectly owned 48,202,310 Class B shares of TerraForm Power and 48,202,310 Class B units of Terra LLC.
Stockholder Protection Rights Agreement
On July 24, 2016, the Company's Board of Directors (the “Board”) adopted a Stockholder Protection Rights Agreement (the “Rights Agreement”) and declared a dividend of one right on each outstanding share of TerraForm Power Class A common stock. The record date to determine which stockholders were entitled to receive the rights was August 4, 2016. The Rights Agreement was adopted in response to the potential sale of a significant equity stake in the Company by SunEdison and the potential accumulation of TerraForm Power Class A shares. The Rights Agreement and the rights expired in accordance with their terms on August 10, 2017, which was the date of the annual shareholders meeting for 2017 of TerraForm Power.
Merger Consummation and SunEdison Settlement Agreement
As discussed in Note 1. Nature of Operations and Basis of Presentation, on October 16, 2017, pursuant to the Merger Agreement, Merger Sub merged with and into TerraForm Power, with TerraForm Power continuing as the surviving corporation in the Merger. Immediately following the consummation of the Merger, there were 148,086,027 Class A shares of TerraForm Power outstanding, which excludes 138,402 Class A shares that were issued and held in treasury to pay applicable employee tax withholdings for RSUs held by employees that vested upon the consummation of the Merger. As a result of the Merger, Orion Holdings holds 51% of TerraForm Power's outstanding Class A shares.
Prior to the consummation of the Merger, SunEdison was the indirect holder of 100% of the shares of Class B common stock of TerraForm Power and held approximately 83.9% of the combined total voting power of the holders of TerraForm Power’s Class A common stock and Class B common stock. As contemplated by the Merger Agreement and in satisfaction of its obligations under the Settlement Agreement, SunEdison exchanged, effective immediately prior to the effective time of the Merger, all of the Class B units of Terra LLC held by it or any of its controlled affiliates for 48,202,310 Class A shares of TerraForm Power. Following completion of this exchange, all of the issued and outstanding shares of Class B common stock of