DIAMONDBACK ENERGY INC

Ticker: FANG CUSIP: 25278X109 Class: Com

OBERWEIS ASSET MANAGEMENT INC/'s Holding History (CIK: 0000937886)

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

Q4 2018

Shares 14,005 Value ($000) $1,298 Avg Close $86.64 Range $66.08 - $109.08

Q3 2018

Shares 16,653 Value ($000) $2,251 Avg Close $98.81 Range $86.24 - $107.01

Q2 2018

Shares 42,026 Value ($000) $5,529 Avg Close $95.97 Range $83.42 - $106.92

Q1 2018

Shares 42,216 Value ($000) $5,341 Avg Close $97.43 Range $81.71 - $104.08

Q4 2017

Shares 43,805 Value ($000) $5,530 Avg Close $83.84 Range $74.00 - $98.56

Q3 2017

Shares 53,345 Value ($000) $5,226 Avg Close $71.15 Range $64.00 - $76.06

Q2 2017

Shares 53,775 Value ($000) $4,776 Avg Close $75.06 Range $64.35 - $83.65

Q1 2017

Shares 53,970 Value ($000) $5,597 Avg Close $79.82 Range $74.27 - $88.15

Q4 2016

Shares 73,870 Value ($000) $7,465 Avg Close $77.21 Range $68.62 - $87.56

Q3 2016

Shares 74,320 Value ($000) $7,175 Avg Close $71.21 Range $64.88 - $77.09

Q2 2016

Shares 77,680 Value ($000) $7,085 Avg Close $66.84 Range $56.54 - $74.24

Q1 2016

Shares 82,860 Value ($000) $6,395 Avg Close $54.55 Range $42.90 - $61.76

Q4 2015

Shares 68,590 Value ($000) $4,589 Avg Close $57.52 Range $47.56 - $63.56

Q3 2015

Shares 68,720 Value ($000) $4,439 Avg Close $52.53 Range $46.61 - $59.82

Q2 2015

Shares 23,260 Value ($000) $1,753 Avg Close $61.45 Range $56.73 - $66.36

Q1 2015

Shares 20,870 Value ($000) $1,604 Avg Close $53.65 Range $42.94 - $60.90

Q4 2014

Shares 27,670 Value ($000) $1,654 Avg Close $49.19 Range $39.97 - $59.50

Q3 2014

Shares 22,200 Value ($000) $1,660 Avg Close $62.67 Range $54.64 - $69.97

Q2 2014

Shares 22,100 Value ($000) $1,962 Avg Close $58.84 Range $49.53 - $72.17

Q1 2014

Shares 27,000 Value ($000) $1,817 Avg Close $44.48 Range $34.04 - $54.90

Q4 2013

Shares 23,700 Value ($000) $1,253 Avg Close $38.43 Range $32.62 - $45.40

Q3 2013

Shares 18,700 Value ($000) $797 Avg Close $31.43 Range $25.84 - $36.51

Q2 2013

Shares 20,500 Value ($000) $683 Avg Close $23.41 Range $18.43 - $27.77

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2018	14,005	$1,298	$86.64	$66.08 - $109.08
Q3 2018	16,653	$2,251	$98.81	$86.24 - $107.01
Q2 2018	42,026	$5,529	$95.97	$83.42 - $106.92
Q1 2018	42,216	$5,341	$97.43	$81.71 - $104.08
Q4 2017	43,805	$5,530	$83.84	$74.00 - $98.56
Q3 2017	53,345	$5,226	$71.15	$64.00 - $76.06
Q2 2017	53,775	$4,776	$75.06	$64.35 - $83.65
Q1 2017	53,970	$5,597	$79.82	$74.27 - $88.15
Q4 2016	73,870	$7,465	$77.21	$68.62 - $87.56
Q3 2016	74,320	$7,175	$71.21	$64.88 - $77.09
Q2 2016	77,680	$7,085	$66.84	$56.54 - $74.24
Q1 2016	82,860	$6,395	$54.55	$42.90 - $61.76
Q4 2015	68,590	$4,589	$57.52	$47.56 - $63.56
Q3 2015	68,720	$4,439	$52.53	$46.61 - $59.82
Q2 2015	23,260	$1,753	$61.45	$56.73 - $66.36
Q1 2015	20,870	$1,604	$53.65	$42.94 - $60.90
Q4 2014	27,670	$1,654	$49.19	$39.97 - $59.50
Q3 2014	22,200	$1,660	$62.67	$54.64 - $69.97
Q2 2014	22,100	$1,962	$58.84	$49.53 - $72.17
Q1 2014	27,000	$1,817	$44.48	$34.04 - $54.90
Q4 2013	23,700	$1,253	$38.43	$32.62 - $45.40
Q3 2013	18,700	$797	$31.43	$25.84 - $36.51
Q2 2013	20,500	$683	$23.41	$18.43 - $27.77