13D Filing: Ardsley Partners and Marrone Bio Innovations Inc (MBII)

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Executed by Steve Napoli as Attorney-in-Fact for Philip J. Hempleman. The Power of Attorney for Mr. Hempleman is attached as Exhibit
2 to the Statement on Schedule 13G/A with respect to the Common Stock of Vaxgen, Inc., filed on February 15, 2006, and is incorporated
herein by reference.

The original
statement shall be signed by each person on whose behalf the statement is filed or his authorized representative. If the statement
is signed on behalf of a person by his authorized representative other than an executive officer or general partner of the filing
person, evidence of the representative’s authority to sign on behalf of such person shall be filed with the statement, provided,
however, that a power of attorney for this purpose which is already on file with the Commission may be incorporated by reference.
The name and any title of each person who signs the statement shall be typed or printed beneath his signature.

NOTE:
Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See
§240.13d-7 for other parties for whom copies are to be sent.