DIAMONDBACK ENERGY INC

Ticker: FANG CUSIP: 25278X109 Class: Com

Yorktown Energy Partners X, L.P.'s Holding History (CIK: 0001577919)

Note: Option positions (PUT/CALL) are excluded.

Q1 2018
Shares 186,575 Value ($000) $23,605 Avg Close $97.43 Range $81.71 - $104.08
Q4 2017
Shares 124,562 Value ($000) $15,726 Avg Close $83.84 Range $74.00 - $98.56