SYNDAX PHARMACEUTICALS INC

Ticker: SNDX CUSIP: 87164F105 Class: Common Stock

RA CAPITAL MANAGEMENT, L.P.'s Holding History (CIK: 0001346824)

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

Q1 2021

Shares 1,023,067 Value ($000) $22,876 Avg Close $22.59 Range $19.05 - $25.68

Q4 2020

Shares 1,023,067 Value ($000) $22,753 Avg Close $20.74 Range $13.92 - $27.85

Q3 2020

Shares 1,023,067 Value ($000) $15,100 Avg Close $15.24 Range $13.04 - $17.99

Q2 2020

Shares 1,023,067 Value ($000) $15,162 Avg Close $15.23 Range $8.72 - $21.97

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2021	1,023,067	$22,876	$22.59	$19.05 - $25.68
Q4 2020	1,023,067	$22,753	$20.74	$13.92 - $27.85
Q3 2020	1,023,067	$15,100	$15.24	$13.04 - $17.99
Q2 2020	1,023,067	$15,162	$15.23	$8.72 - $21.97