SYNDAX PHARMACEUTICALS INC

Ticker: SNDX CUSIP: 87164F105 Class: Common Stock

ArrowMark Colorado Holdings LLC's Holding History (CIK: 0001483859)

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

Q3 2017

Shares 497,801 Value ($000) $5,824 Avg Close $12.26 Range $10.56 - $14.17

Q2 2017

Shares 466,427 Value ($000) $6,516 Avg Close $11.43 Range $7.41 - $15.43

Q1 2017

Shares 504,697 Value ($000) $6,924 Avg Close $10.38 Range $6.31 - $15.70

Q4 2016

Shares 266,164 Value ($000) $1,908 Avg Close $10.96 Range $6.69 - $16.40

Q3 2016

Shares 467,461 Value ($000) $7,087 Avg Close $13.15 Range $9.60 - $18.03

Q2 2016

Shares 172,633 Value ($000) $1,700 Avg Close $13.71 Range $8.97 - $17.49

Q1 2016

Shares 149,931 Value ($000) $1,997 Avg Close $12.54 Range $10.60 - $16.30

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2017	497,801	$5,824	$12.26	$10.56 - $14.17
Q2 2017	466,427	$6,516	$11.43	$7.41 - $15.43
Q1 2017	504,697	$6,924	$10.38	$6.31 - $15.70
Q4 2016	266,164	$1,908	$10.96	$6.69 - $16.40
Q3 2016	467,461	$7,087	$13.15	$9.60 - $18.03
Q2 2016	172,633	$1,700	$13.71	$8.97 - $17.49
Q1 2016	149,931	$1,997	$12.54	$10.60 - $16.30