X0306 4 2016-02-10 1 0001605997 Northern Power Systems Corp. NPS 0001303053 Allen & CO LLC 711 FIFTH AVENUE NEW YORK NY 10022 0 0 1 0 0001389544 ALLEN OPERATIONS LLC 711 FIFTH AVENUE NEW YORK NY 10022 0 0 1 0 0001295077 Allen Herbert A III 711 FIFTH AVENUE NEW YORK NY 10022 0 0 1 0 Common Stock 2016-02-10 4 J 0 3799376 0.00 D 0 I See Footnote This report on Form 4 relates to shares that were owned directly by Allen & Company LLC, which is a wholly owned subsidiary of Allen Operations LLC. Herbert A. Allen III is the President of Allen & Company LLC and Allen Operations LLC. Mr. Allen and Allen Operations LLC were deemed indirect beneficial owners of the reported securities. Mr. Allen and Allen Operations LLC expressly disclaim beneficial ownership of these shares except to the extent of their respective pecuniary interests therein, if any. Certain employees, affiliates and related parties of Allen & Company LLC held a beneficial interest in the shares held of record by Allen & Company LLC. Allen & Company LLC distributed all such shares to the applicable beneficial owners, and, as a result, Allen & Company LLC no longer owns or controls any shares of Common Stock of the Issuer. ALLEN & COMPANY LLC, By: /s/ Peter DiIorio, Peter DiIorio, General Counsel 2016-04-07 ALLEN OPERATIONS LLC, By: /s/ Peter DiIorio, Peter DiIorio, General Counsel 2016-04-07 HERBERT A. ALLEN III, By: /s/ Herbert A. Allen III 2016-04-07