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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1539838	Diamondback Energy Inc.	FANG	Crude Petroleum & Natural Gas (1311)	000000000

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1001391	E Charles Davidson	411 West Purnam Avenue Suite 125 Greenwich CT 06830	No	No	Yes	No
1048462	Wexford Capital Lp	411 West Putnam Avenue Suite 125 Greenwich CT 06830	No	No	Yes	No
1048485	Joseph Jacobs	411 West Putnam Avenue Suite 125 Greenwich CT 06830	No	No	Yes	No
1472112	Wexford Gp Llc	411 West Putnam Avenue Suite 125 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, Par Value $0.01 Per Share	Acquisiton	2012-10-11	1,717,126	$17.50	16,414,622	No	4	P	Indirect	See Footnotes

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	See Footnotes

Footnotes

This Form 4 is jointly filed by Wexford Capital LP, Charles E. Davidson, Joseph M. Jacobs and Wexford GP LLC, with respect to shares of common stock, par value $0.01 per share (the "Common Stock"), of Diamondback Energy, Inc. (the "Issuer").
Wexford Capital LP ("Wexford Capital") may, by reason of its status as manager of DB Energy Holdings LLC ("DB Energy"), be deemed to own beneficially the securities of which DB Energy possesses beneficial ownership. Wexford GP LLC ("Wexford GP") may, as the General Partner of Wexford Capital, be deemed to own beneficially the securities of which DB Energy possesses beneficial ownership. Each of Charles E. Davidson ("Davidson") and Joseph M. Jacobs ("Jacobs") may, by reason of his status as a controlling person of Wexford GP, be deemed to own beneficially the securities of which DB Energy possesses beneficial ownership. Each of Wexford Capital, Wexford GP, Davidson and Jacobs shares the power to vote and to dispose of the securities beneficially owned by DB Energy.
Each of Wexford Capital, Wexford GP, Davidson and Jacobs disclaims beneficial ownership of the securities owned by DB Energy and this report shall not be deemed as an admission that they are the beneficial owners of such securities except, in the case of Davidson and Jacobs, to the extent of their respective interests in each member of DB Energy.
DB Energy purchased 1,717,126 shares of Common Stock in the initial public offering of the Issuer.