X0306 4 2016-05-13 1 0001599947 TerraForm Power, Inc. TERP 0001427430 BlueMountain Capital Management, LLC 280 PARK AVENUE, 12TH FLOOR NEW YORK NY 10017 0 0 1 0 0001540859 BlueMountain GP Holdings, LLC 280 PARK AVENUE, 12TH FLOOR NEW YORK NY 10017 0 0 1 0 0001540861 Blue Mountain CA Master Fund GP, Ltd. 280 PARK AVENUE, 12TH FLOOR NEW YORK NY 10017 0 0 1 0 0001540860 Blue Mountain Credit Alternatives Master Fund L.P. 280 PARK AVENUE, 12TH FLOOR NEW YORK NY 10017 0 0 1 0 0001659032 BLUEMOUNTAIN FOINAVEN GP, LLC 280 PARK AVENUE, 12TH FLOOR NEW YORK NY 10017 0 0 1 0 0001650089 BLUEMOUNTAIN FOINAVEN MASTER FUND L.P. 280 PARK AVENUE, 12TH FLOOR NEW YORK NY 10017 0 0 1 0 0001541088 BlueMountain Long/Short Credit GP, LLC 280 PARK AVENUE, 12TH FLOOR NEW YORK NY 10017 0 0 1 0 0001598919 BlueMountain Guadalupe Peak Fund L.P. 280 PARK AVENUE, 12TH FLOOR NEW YORK NY 10017 0 0 1 0 0001658967 BLUEMOUNTAIN LOGAN OPPORTUNITIES GP, LLC 280 PARK AVENUE, 12TH FLOOR NEW YORK NY 10017 0 0 1 0 0001650201 BLUEMOUNTAIN LOGAN OPPORTUNITIES MASTER FUND L.P. 280 PARK AVENUE, 12TH FLOOR NEW YORK NY 10017 0 0 1 0 Class A Common Stock 2016-05-13 4 S 0 50000 8.78 D 9119934 I Footnotes Class A Common Stock 2016-05-13 4 S 0 44042 8.78 D 8033248 I Footnotes Class A Common Stock 2016-05-13 4 S 0 35479 8.78 D 6471200 I Footnotes Class A Common Stock 2016-05-13 4 S 0 35479 8.78 D 6471200 D Class A Common Stock 2016-05-13 4 S 0 3689 8.78 D 672929 I Footnotes Class A Common Stock 2016-05-13 4 S 0 3689 8.78 D 672929 D Class A Common Stock 2016-05-13 4 S 0 1398 8.78 D 255029 I Footnotes Class A Common Stock 2016-05-13 4 S 0 1398 8.78 D 255029 D Class A Common Stock 2016-05-13 4 S 0 2471 8.78 D 450721 I Footnotes Class A Common Stock 2016-05-13 4 S 0 2471 8.78 D 450721 D Class A Common Stock 2016-05-13 4 S 0 4060 8.78 D 740502 I Footnotes Class A Common Stock 2016-05-13 4 S 0 4060 8.78 D 740502 D Class A Common Stock 2016-05-13 4 S 0 1005 8.78 D 183369 I Footnotes Class A Common Stock 2016-05-13 4 S 0 1005 8.78 D 183369 D Class A Common Stock 2016-05-13 4 S 0 1898 8.78 D 346184 D The filing of this Form 4 shall not be construed as an admission that any of BlueMountain Capital Management, LLC ("BMCM"), GP Holdings (as defined in Footnote 5) or the General Partners (as defined in Footnote 5) is or was for the purposes of Section 16(a) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise the beneficial owner of any of the shares of Class A Common Stock, par value $0.01 per share (the "Common Stock"), of Terraform Power, Inc. (the "Issuer"). Pursuant to Rule 16a-1(a)(4) of the Exchange Act, each of BMCM, GP Holdings and the General Partners disclaims such beneficial ownership, except to the extent of its respective pecuniary interest. BMCM is the investment manager of each of: (i) Blue Mountain Credit Alternatives Master Fund L.P. ("BMCA"), which is the beneficial owner of 6,471,200 shares of Common Stock; (ii) BlueMountain Foinaven Master Fund L.P. ("BMFV"), which is the beneficial owner of 672,929 shares of Common Stock; (iii) BlueMountain Guadalupe Peak Fund L.P. ("BMGP"), which is the beneficial owner of 255,029 shares of Common Stock; (iv) BlueMountain Logan Opportunities Master Fund L.P. ("BMLO"), which is the beneficial owner of 450,721 shares of Common Stock; (v) BlueMountain Montenvers Fund SCA SICAV-SIF ("BMM"), which is the beneficial owner of 740,502 shares of Common Stock; (vi) BlueMountain Kicking Horse Fund L.P. ("BMKH" and, together with BMCA, BMFV, BMGP and BMLO, the "Partnerships"), which is the beneficial owner of 183,369 shares of Common Stock; and (vii) BlueMountain Timberline Ltd. ("BMT" and, together with the Partnerships and BMM, the "Funds"), which is the beneficial owner of 346,184 shares of Common Stock. BMCM, although it directs the voting and disposition of the Common Stock held by the Funds, only receives an asset-based fee relating to the Common Stock held by the Funds. (i) Blue Mountain CA Master Fund GP, Ltd. ("BMCA GP") is the general partner of BMCA and has an indirect profits interest in the Common Stock beneficially owned by it; (ii) BlueMountain Foinaven GP, LLC ("BMFV GP") is the general partner of BMFV and has an indirect profits interest in the Common Stock beneficially owned by it; (iii) BlueMountain Long/Short Credit GP, LLC ("BMGP GP") is the general partner of BMGP and has an indirect profits interest in the Common Stock beneficially owned by it; (iv) BlueMountain Montenvers GP S.a r.l. ("BMM GP") is the general partner of BMM and has an indirect profits interest in the Common Stock beneficially owned by it; (v) BlueMountain Logan Opportunities GP, LLC ("BMLO GP") is the general partner of BMLO and has an indirect profits interest in the Common Stock beneficially owned by it; and (vi) BlueMountain Kicking Horse Fund GP, LLC ("BMKH GP" and, together with BMCA GP, BMFV GP, BMGP GP and BMLO GP, the "General Partners") is the general partner of BMKH and has an indirect profits interest in the Common Stock beneficially owned by it. BlueMountain GP Holdings, LLC ("GP Holdings") is the sole owner of each of the General Partners and thus has an indirect profits interest in the Common Stock beneficially owned by the Partnerships. BMCM is the sole owner of BMM GP and thus has an indirect profits interest in the Common Stock beneficially owned by BMM. On May 13, 2016: (i) BMCA sold 35,479 shares of Common Stock; (ii) BMFV sold 3,689 shares of Common Stock; (iii) BMGP sold 1,398 shares of Common Stock; (iv) BMLO sold 2,471 shares of Common Stock; (v) BMM sold 4,060 shares of Common Stock; (vi) BMKH sold 1,005 shares of Common Stock; and (vii) BMT sold 1,898 shares of Common Stock. The Reporting Persons are jointly filing this Form 4 pursuant to Rule 16(a)-3(j) under the Exchange Act. The Form 4 for certain additional Reporting Persons is being filed separately and simultaneously with this Form 4 due to the limitation of ten Reporting Persons per filing. BlueMountain Capital Management, LLC, By: /s/ Eric M. Albert, Chief Compliance Officer 2016-05-17 BlueMountain GP Holdings, LLC, By: /s/ Eric M. Albert, Chief Compliance Officer 2016-05-17 Blue Mountain CA Master Fund GP, Ltd., By: /s/ Andrew Feldstein, Director 2016-05-17 Blue Mountain Credit Alternatives Master Fund L.P., By: BlueMountain CA Master Fund GP, Ltd., By: /s/ Andrew Feldstein, Director 2016-05-17 BlueMountain Foinaven GP, LLC, By: BlueMountain GP Holdings, LLC, By: /s/ Eric M. Albert, Chief Compliance Officer 2016-05-17 BlueMountain Foinaven Master Fund L.P., By: BlueMountain Foinaven GP, LLC, By: BlueMountain GP Holdings, LLC, By: /s/ Eric M. Albert, Chief Compliance Officer 2016-05-17 BlueMountain Long/Short Credit GP, LLC, By: BlueMountain GP Holdings, LLC, By: /s/ Eric M. Albert, Chief Compliance Officer 2016-05-17 BlueMountain Guadalupe Peak Fund L.P., By: BlueMountain Long/Short Credit GP, LLC, By: BlueMountain GP Holdings, LLC, By: /s/ Eric M. Albert, Chief Compliance Officer 2016-05-17 BlueMountain Logan Opportunities GP, LLC, By: BlueMountain GP Holdings, LLC, By: /s/ Eric M. Albert, Chief Compliance Officer 2016-05-17 BlueMountain Logan Opportunities Master Fund L.P., By: BlueMountain Logan Opportunities GP, LLC, By: BlueMountain GP Holdings, LLC, By: /s/ Eric M. Albert, Chief Compliance Officer 2016-05-17