13D Filing: Geode Capital Management LP and Rosehill Resources Inc (ROSE)

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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 this filing person), evidence of the
representatives 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.

Attention: Intentional misstatements or omissions of fact
constitute Federal criminal violations (See 18 U.S.C. 1001).

Exhibit A

JOINT FILING AGREEMENT

The undersigned agree that this Amendment No 1 to the Original
Schedule 13D, and any further amendments thereto, signed by each of the
undersigned shall be, filed on behalf of each of them pursuant to and in
accordance with the provisions of Rule 13d-1(k) under the Securities Exchange
Act of 1934, as amended.