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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	Insider Title	Director	Officer	Large Shareholder	Other
1290795	Lawrence Mark Plaumann	500 West Texas Suite 1200 Midland TX 79701		Yes	No	No	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	2015-09-14	3,000	$65.66	8,046	No	4	S	Indirect	By Greyhawke Capital Advisors LLC

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	By Greyhawke Capital Advisors LLC

Footnotes

The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $65.655 to $65.66 per share, inclusive. The reporting person undertakes to provide to Diamondback Energy, Inc., any security holder of Diamondback Energy, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
These shares were previously assigned by Mr. Plaumann to Greyhawke Capital Advisors LLC ("Greyhawke").
These shares are held by Greyhawke, of which Mr. Plaumann is a managing member. Mr. Plaumann holds a 50% ownership interest in Greyhawke and may be deemed to have a pecuniary interest in these securities.