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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
1559931	L. Teresa Dick	500 West Texas, Suite 1200 Midland TX 79701	Cfo, Sr. Vp	No	Yes	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	Acquisiton	2014-06-20	10,000	$17.50	10,788	No	4	M	Direct
Common Stock	Disposition	2014-06-20	10,000	$90.06	788	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Option (right to buy)	Disposition	2014-06-20	10,000	$0.00	10,000	$17.50

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
31,910		2016-09-01	No	4	M	Direct

Footnotes

All of these options to purchase 10,000 shares of common stock of the issuer were vested as of September 1, 2013.
Of the remaining options, options to purchase 6,910 shares of common stock are vested and options to purchase 25,000 shares of common stock will vest in two equal annual installments beginning on September 1, 2014.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $90.000 per share to $90.420 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 ranges set forth in footnote (3) to this Form 4.