SNDX · Syndax Pharmaceuticals Inc

Track SNDX — free

$19.76 -0.08 (-0.40%) At close · Aug 17

Market Cap

$1.77B

89.30M

Options Chain

Underlying $19.76 · at close Aug 17, 2026 Options Calculator

Positioning

Aug 21, 2026 · 3 days to expiry · 62 contracts · mixed snapshot sessions · Jun 9, 2026–Aug 17, 2026; 21 unknown

Put / call OI

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dated and unknown snapshot sessions

Open interest

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dated and unknown snapshot sessions

Volume

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dated and unknown snapshot sessions

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 3d Sep 18 31d Oct 16 59d Nov 20 94d Jan 15 150d Jan 21 521d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	451%	0.96	—		—	-0.067	559%	—	0
Call · $10 In the money Snapshot session Unknown Last — Breakeven — Implied vol 451% Delta 0.96 ≈96% ITM Gamma 0.01 Theta -0.108 Vega 0.001 Open interest 0 Model this call Put · $10 Snapshot session Unknown Last — Breakeven — Implied vol 559% Delta -0.067 ≈7% ITM Gamma 0.012 Theta -0.197 Vega 0.002 Open interest 0 Model this put
0	—	457.2%	0.934	—		—	-0.076	496.1%	—	0
Call · $11 In the money Snapshot session Unknown Last — Breakeven — Implied vol 457.2% Delta 0.934 ≈93% ITM Gamma 0.014 Theta -0.159 Vega 0.003 Open interest 0 Model this call Put · $11 Snapshot session Unknown Last — Breakeven — Implied vol 496.1% Delta -0.076 ≈8% ITM Gamma 0.015 Theta -0.194 Vega 0.003 Open interest 0 Model this put
0	—	346.3%	0.948	—		—	-0.091	456%	—	0
Call · $12 In the money Snapshot session Unknown Last — Breakeven — Implied vol 346.3% Delta 0.948 ≈95% ITM Gamma 0.016 Theta -0.102 Vega 0.003 Open interest 0 Model this call Put · $12 Snapshot session Unknown Last — Breakeven — Implied vol 456% Delta -0.091 ≈9% ITM Gamma 0.018 Theta -0.206 Vega 0.004 Open interest 0 Model this put
0	—	298.3%	0.94	—		$0.05	-0.099	384.8%	4	4
Call · $13 In the money Snapshot session Unknown Last — Breakeven — Implied vol 298.3% Delta 0.94 ≈94% ITM Gamma 0.02 Theta -0.097 Vega 0.003 Open interest 0 Model this call Put · $13 Snapshot session Aug 5, 2026 Last $0.05 Breakeven $12.95 Implied vol 384.8% Delta -0.099 ≈10% ITM Gamma 0.023 Theta -0.183 Vega 0.004 Open interest 4 Model this put
2	7	—	—	$8.30		$0.05	-0.113	330.6%	2	2
Call · $14 In the money Snapshot session Jun 30, 2026 Last $8.30 Breakeven $22.30 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 Model this call Put · $14 Snapshot session Jul 20, 2026 Last $0.05 Breakeven $13.95 Implied vol 330.6% Delta -0.113 ≈11% ITM Gamma 0.029 Theta -0.172 Vega 0.004 Open interest 2 Model this put
17	2	213%	0.919	$8.00		$0.15	-0.074	204.9%	10	10
Call · $15 In the money Snapshot session Jul 13, 2026 Last $8.00 Breakeven $23.00 Implied vol 213% Delta 0.919 ≈92% ITM Gamma 0.036 Theta -0.088 Vega 0.003 Open interest 17 Model this call Put · $15 Snapshot session Jul 29, 2026 Last $0.15 Breakeven $14.85 Implied vol 204.9% Delta -0.074 ≈7% ITM Gamma 0.034 Theta -0.077 Vega 0.003 Open interest 10 Model this put
1	1	—	—	$3.20		$0.35	-0.105	182.9%	5	13
Call · $16 In the money Snapshot session Jun 9, 2026 Last $3.20 Breakeven $19.20 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this call Put · $16 Snapshot session Jul 31, 2026 Last $0.35 Breakeven $15.65 Implied vol 182.9% Delta -0.105 ≈11% ITM Gamma 0.051 Theta -0.091 Vega 0.003 Open interest 13 Model this put
3	2	—	—	$2.85		$0.60	-0.165	169.1%	75	81
Call · $17 In the money Snapshot session Aug 13, 2026 Last $2.85 Breakeven $19.85 Implied vol — Delta — Gamma — Theta — Vega — Open interest 3 Model this call Put · $17 Snapshot session Jul 29, 2026 Last $0.60 Breakeven $16.40 Implied vol 169.1% Delta -0.165 ≈17% ITM Gamma 0.074 Theta -0.113 Vega 0.005 Open interest 81 Model this put
2	2	173.8%	0.734	$1.95		$0.36	-0.197	118.5%	2	179
Call · $18 In the money Snapshot session Aug 13, 2026 Last $1.95 Breakeven $19.95 Implied vol 173.8% Delta 0.734 ≈73% ITM Gamma 0.095 Theta -0.156 Vega 0.007 Open interest 2 Model this call Put · $18 Snapshot session Aug 6, 2026 Last $0.36 Breakeven $17.64 Implied vol 118.5% Delta -0.197 ≈20% ITM Gamma 0.119 Theta -0.089 Vega 0.005 Open interest 179 Model this put
13	7	62.8%	0.747	$0.60		$0.55	-0.284	74.3%	8	245
Call · $19 In the money Snapshot session Aug 14, 2026 Last $0.60 Breakeven $19.60 Implied vol 62.8% Delta 0.747 ≈75% ITM Gamma 0.258 Theta -0.056 Vega 0.007 Open interest 13 Model this call Put · $19 Snapshot session Aug 14, 2026 Last $0.55 Breakeven $18.45 Implied vol 74.3% Delta -0.284 ≈28% ITM Gamma 0.231 Theta -0.068 Vega 0.007 Open interest 245 Model this put
Underlying $19.76
276	181	68.8%	0.45	$0.49		$1.07	-0.558	62.7%	1	616
Call · $20 Snapshot session Aug 17, 2026 Last $0.49 Breakeven $20.49 Implied vol 68.8% Delta 0.45 ≈45% ITM Gamma 0.291 Theta -0.075 Vega 0.008 Open interest 276 Model this call Put · $20 In the money Snapshot session Aug 14, 2026 Last $1.07 Breakeven $18.93 Implied vol 62.7% Delta -0.558 ≈56% ITM Gamma 0.319 Theta -0.066 Vega 0.008 Open interest 616 Model this put
65	37	68.2%	0.201	$0.65		$0.95	-0.686	110.3%	4	16
Call · $21 Snapshot session Aug 7, 2026 Last $0.65 Breakeven $21.65 Implied vol 68.2% Delta 0.201 ≈20% ITM Gamma 0.208 Theta -0.052 Vega 0.005 Open interest 65 Model this call Put · $21 In the money Snapshot session Aug 12, 2026 Last $0.95 Breakeven $20.05 Implied vol 110.3% Delta -0.686 ≈69% ITM Gamma 0.163 Theta -0.105 Vega 0.007 Open interest 16 Model this put
103	15	126.1%	0.219	$0.15		$1.30	-0.822	108.4%	5	3
Call · $22 Snapshot session Aug 12, 2026 Last $0.15 Breakeven $22.15 Implied vol 126.1% Delta 0.219 ≈22% ITM Gamma 0.119 Theta -0.101 Vega 0.006 Open interest 103 Model this call Put · $22 In the money Snapshot session Jul 15, 2026 Last $1.30 Breakeven $20.70 Implied vol 108.4% Delta -0.822 ≈82% ITM Gamma 0.122 Theta -0.075 Vega 0.006 Open interest 3 Model this put
92	1	124.6%	0.126	$0.05		$2.30	-0.902	111.8%	5	4
Call · $23 Snapshot session Aug 13, 2026 Last $0.05 Breakeven $23.05 Implied vol 124.6% Delta 0.126 ≈13% ITM Gamma 0.084 Theta -0.07 Vega 0.004 Open interest 92 Model this call Put · $23 In the money Snapshot session Jul 22, 2026 Last $2.30 Breakeven $20.70 Implied vol 111.8% Delta -0.902 ≈90% ITM Gamma 0.079 Theta -0.051 Vega 0.004 Open interest 4 Model this put
143	1	178.6%	0.158	$0.21		$2.45	-0.841	179%	5	5
Call · $24 Snapshot session Aug 11, 2026 Last $0.21 Breakeven $24.21 Implied vol 178.6% Delta 0.158 ≈16% ITM Gamma 0.069 Theta -0.118 Vega 0.006 Open interest 143 Model this call Put · $24 In the money Snapshot session Jul 17, 2026 Last $2.45 Breakeven $21.55 Implied vol 179% Delta -0.841 ≈84% ITM Gamma 0.069 Theta -0.117 Vega 0.006 Open interest 5 Model this put
469	1	182.8%	0.119	$0.15		$2.52	-0.856	202.3%	50	2
Call · $25 Snapshot session Aug 4, 2026 Last $0.15 Breakeven $25.15 Implied vol 182.8% Delta 0.119 ≈12% ITM Gamma 0.055 Theta -0.098 Vega 0.004 Open interest 469 Model this call Put · $25 In the money Snapshot session Jul 8, 2026 Last $2.52 Breakeven $22.48 Implied vol 202.3% Delta -0.856 ≈86% ITM Gamma 0.057 Theta -0.124 Vega 0.004 Open interest 2 Model this put
31	3	256%	0.173	$0.70		—	-0.9	198.2%	—	0
Call · $26 Snapshot session Jul 21, 2026 Last $0.70 Breakeven $26.70 Implied vol 256% Delta 0.173 ≈17% ITM Gamma 0.051 Theta -0.179 Vega 0.006 Open interest 31 Model this call Put · $26 In the money Snapshot session Unknown Last — Breakeven — Implied vol 198.2% Delta -0.9 ≈90% ITM Gamma 0.045 Theta -0.092 Vega 0.004 Open interest 0 Model this put
45	1	288.6%	0.174	$0.08		—	-0.875	243.3%	—	0
Call · $27 Snapshot session Aug 11, 2026 Last $0.08 Breakeven $27.08 Implied vol 288.6% Delta 0.174 ≈17% ITM Gamma 0.045 Theta -0.202 Vega 0.006 Open interest 45 Model this call Put · $27 In the money Snapshot session Unknown Last — Breakeven — Implied vol 243.3% Delta -0.875 ≈88% ITM Gamma 0.043 Theta -0.133 Vega 0.004 Open interest 0 Model this put
24	2	298.2%	0.155	$0.41		—	-0.913	238.5%	—	0
Call · $28 Snapshot session Jul 21, 2026 Last $0.41 Breakeven $28.41 Implied vol 298.2% Delta 0.155 ≈15% ITM Gamma 0.04 Theta -0.193 Vega 0.004 Open interest 24 Model this call Put · $28 In the money Snapshot session Unknown Last — Breakeven — Implied vol 238.5% Delta -0.913 ≈91% ITM Gamma 0.034 Theta -0.102 Vega 0.004 Open interest 0 Model this put
5	1	328.2%	0.158	$0.05		—	-0.981	179.7%	—	0
Call · $29 Snapshot session Aug 5, 2026 Last $0.05 Breakeven $29.05 Implied vol 328.2% Delta 0.158 ≈16% ITM Gamma 0.037 Theta -0.216 Vega 0.004 Open interest 5 Model this call Put · $29 In the money Snapshot session Unknown Last — Breakeven — Implied vol 179.7% Delta -0.981 ≈98% ITM Gamma 0.014 Theta -0.021 Vega 0.001 Open interest 0 Model this put
104	5	462.3%	0.255	$0.10		—	-0.982	193.5%	—	0
Call · $30 Snapshot session Jul 28, 2026 Last $0.10 Breakeven $30.10 Implied vol 462.3% Delta 0.255 ≈25% ITM Gamma 0.035 Theta -0.402 Vega 0.006 Open interest 104 Model this call Put · $30 In the money Snapshot session Unknown Last — Breakeven — Implied vol 193.5% Delta -0.982 ≈98% ITM Gamma 0.012 Theta -0.021 Vega 0.001 Open interest 0 Model this put
0	—	350.9%	0.137	—		$11.40	—	—	2	0
Call · $31 Snapshot session Unknown Last — Breakeven — Implied vol 350.9% Delta 0.137 ≈14% ITM Gamma 0.031 Theta -0.207 Vega 0.004 Open interest 0 Model this call Put · $31 In the money Snapshot session Jul 28, 2026 Last $11.40 Breakeven $19.60 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	1	308.5%	0.08	$0.15		$12.85	—	—	2	1
Call · $32 Snapshot session Jul 20, 2026 Last $0.15 Breakeven $32.15 Implied vol 308.5% Delta 0.08 ≈8% ITM Gamma 0.024 Theta -0.124 Vega 0.003 Open interest 1 Model this call Put · $32 In the money Snapshot session Jul 29, 2026 Last $12.85 Breakeven $19.15 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this put
0	—	383.3%	0.128	—		$13.40	—	—	2	0
Call · $33 Snapshot session Unknown Last — Breakeven — Implied vol 383.3% Delta 0.128 ≈13% ITM Gamma 0.027 Theta -0.216 Vega 0.004 Open interest 0 Model this call Put · $33 In the money Snapshot session Jul 28, 2026 Last $13.40 Breakeven $19.60 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	398.9%	0.125	—		$13.20	—	—	1	0
Call · $34 Snapshot session Unknown Last — Breakeven — Implied vol 398.9% Delta 0.125 ≈12% ITM Gamma 0.026 Theta -0.221 Vega 0.005 Open interest 0 Model this call Put · $34 In the money Snapshot session Jul 24, 2026 Last $13.20 Breakeven $20.80 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
10	10	424.9%	0.131	$0.10		$14.20	-0.934	340.2%	1	0
Call · $35 Snapshot session Jul 16, 2026 Last $0.10 Breakeven $35.10 Implied vol 424.9% Delta 0.131 ≈13% ITM Gamma 0.025 Theta -0.243 Vega 0.005 Open interest 10 Model this call Put · $35 In the money Snapshot session Jul 24, 2026 Last $14.20 Breakeven $20.80 Implied vol 340.2% Delta -0.934 ≈93% ITM Gamma 0.019 Theta -0.115 Vega 0.003 Open interest 0 Model this put
0	—	568.2%	0.221	—		$16.80	—	—	2	0
Call · $36 Snapshot session Unknown Last — Breakeven — Implied vol 568.2% Delta 0.221 ≈22% ITM Gamma 0.026 Theta -0.459 Vega 0.007 Open interest 0 Model this call Put · $36 In the money Snapshot session Jul 29, 2026 Last $16.80 Breakeven $19.20 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	443%	0.116	—		$16.20	—	—	1	0
Call · $37 Snapshot session Unknown Last — Breakeven — Implied vol 443% Delta 0.116 ≈12% ITM Gamma 0.022 Theta -0.234 Vega 0.005 Open interest 0 Model this call Put · $37 In the money Snapshot session Jul 24, 2026 Last $16.20 Breakeven $20.80 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	456.9%	0.114	—		$18.81	—	—	2	0
Call · $38 Snapshot session Unknown Last — Breakeven — Implied vol 456.9% Delta 0.114 ≈11% ITM Gamma 0.021 Theta -0.239 Vega 0.005 Open interest 0 Model this call Put · $38 In the money Snapshot session Jul 29, 2026 Last $18.81 Breakeven $19.19 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	—	—	—		$19.35	—	—	2	0
Call · $39 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $39 In the money Snapshot session Jul 28, 2026 Last $19.35 Breakeven $19.65 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	—	—	—		—	—	—	—	0
Call · $40 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $40 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put

About this data

Each contract's last price, volume, greeks, implied volatility and open interest belongs to the snapshot session shown in its details; unknown means the provider omitted the timestamp. This chain has mixed snapshot sessions · Jun 9, 2026–Aug 17, 2026; 21 unknown. Cross-contract positioning totals are shown only when every returned row has the same known session. Bid and ask are not included on this plan.

In-the-money strikes are tinted, deepening toward the money, and the bar beside each open-interest figure scales to the heaviest strike shown. The 23 strikes around the money are shown by default — switch to "All 31" for the wings.

Key facts CIK 1395937 CUSIP 87164F105 13F (30d) 227 filings 224 filers Visit website Investor relations