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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
1196107	J Randall Holder	500 West Texas, Suite 1225 Midland TX 79701	Vp, General Counsel, Secretary	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
Common Stock	Acquisiton	2013-09-16	4,286	$0.00	4,286	No	4	M	Direct
Common Stock	Disposition	2013-09-16	4,286	$44.71	0	No	4	S	Direct
Common Stock	Acquisiton	2013-09-17	12,500	$17.50	12,500	No	4	M	Direct
Common Stock	Disposition	2013-09-17	12,500	$44.51	0	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
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	Restricted Stock Units	Disposition	2013-09-16	4,286	$0.00	4,286	$0.00
Common Stock	Stock Option (right to buy)	Disposition	2013-09-17	12,500	$0.00	12,500	$17.50

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
12,857			No	4	M	Direct
37,500		2016-11-18	No	4	M	Direct

Footnotes

Each restricted stock unit represents a contingent right to receive one share of common stock, par value $0.01 per share (the "Common Stock"), of Diamondback Energy, Inc. (the "Issuer") and was granted under the Isser's 2012 Stock Incentive Plan.
The remaining 12,857 restricted stock units will vest in three approximately equal annual installments beginning on November 18, 2013.
The remaining options to purchase 37,500 shares of Common Stock will vest in three approximately equal annual installments beginning on November 18, 2013.