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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1533924	Midstates Petroleum Company Inc.	MPO	Crude Petroleum & Natural Gas (1311)	453691816

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
908428	E William Macaulay	One Lafayette Place, Third Floor Greenwich CT 06830	No	No	Yes	No
1543224	Fr Midstates Interholding, Lp	One Lafayette Place, Third Floor Greenwich CT 06830	No	No	Yes	No
1543226	Fr Xii Alternative Gp, L.l.c.	One Lafayette Place, Third Floor Greenwich CT 06830	No	No	Yes	No
1544730	First Reserve Gp Xii, Lp	One Lafayette Place, Third Floor Greenwich CT 06830	No	No	Yes	No
1544731	Ltd Xii Gp Reserve First	One Lafayette Place, Third Floor Greenwich CT 06830	No	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2012-04-25	9,402,470	$12.22	27,147,651	No	4	S	Indirect	D

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	D

Footnotes

This amount represents the $13.00 offering price per share of the Issuer's common stock less the underwriting discounts and commission of $0.78 per share.
These securities are directly held by FR Midstates Interholding, L.P. ("Interholding").
This form is filed jointly by First Reserve GP XII Limited ("GP XII Limited"), First Reserve GP XII, L.P. ("GP XII"), FR XII Alternative GP, LLC ("XII Alternative"), Interholding and William E. Macaulay.
GP XII Limited is the general partner of GP XII, which is the managing member of XII Alternative, which is the general partner of Interholding. Mr. Macaulay is a director of the board of directors of GP XII Limited (the "Board") and has the right to appoint the majority of the directors of the Board.
The reporting persons disclaim beneficial ownership of the reported securities except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting persons are the beneficial owners of the reported securities for purposes of Section 16 or for any other purpose.