VSTM · Verastem, Inc.

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$6.23 +0.15 (+2.47%) At close · Jul 28

Market Cap

$534.27M

87.87M

Options Chain

15-min delayed Underlying $6.23 · at close Jul 28, 2026 Options Calculator

Positioning

Aug 21, 2026 · 23 days to expiry · 18 contracts

Put / call OI

0.33

Call-heavy positioning

Open interest

808

contracts outstanding

Volume

441

traded today

Max pain

$5.00

$1.23 below spot

ATM implied vol

174.4%

market's expected move

Open interest by strike

Calls Puts

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 23d Sep 18 51d Dec 18 142d Jan 15 170d Mar 19 233d Jan 21 541d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	—	—	—		$0.03	—	—	5	0
Call · $1 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $1 Last $0.03 Breakeven $0.97 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
51	1	—	—	$2.07		—	—	—	—	0
Call · $2 In the money Last $2.07 Breakeven $4.07 Implied vol — Delta — Gamma — Theta — Vega — Open interest 51 Model this call Put · $2 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
40	9	—	—	$2.30		—	-0.105	348.7%	—	0
Call · $3 In the money Last $2.30 Breakeven $5.30 Implied vol — Delta — Gamma — Theta — Vega — Open interest 40 Model this call Put · $3 Last — Breakeven — Implied vol 348.7% Delta -0.105 ≈10% ITM Gamma 0.033 Theta -0.021 Vega 0.003 Open interest 0 Model this put
17	10	226.2%	0.851	$2.10		$0.05	-0.103	160.7%	1	43
Call · $4 In the money Last $2.10 Breakeven $6.10 Implied vol 226.2% Delta 0.851 ≈85% ITM Gamma 0.067 Theta -0.018 Vega 0.003 Open interest 17 Model this call Put · $4 Last $0.05 Breakeven $3.95 Implied vol 160.7% Delta -0.103 ≈10% ITM Gamma 0.073 Theta -0.01 Vega 0.003 Open interest 43 Model this put
88	20	—	—	$1.45		$0.26	-0.203	119.9%	4	106
Call · $5 In the money Last $1.45 Breakeven $6.45 Implied vol — Delta — Gamma — Theta — Vega — Open interest 88 Model this call Put · $5 Last $0.26 Breakeven $4.74 Implied vol 119.9% Delta -0.203 ≈20% ITM Gamma 0.153 Theta -0.011 Vega 0.005 Open interest 106 Model this put
132	86	122.3%	0.592	$0.90		$0.80	-0.372	226.4%	24	50
Call · $6 In the money Last $0.90 Breakeven $6.90 Implied vol 122.3% Delta 0.592 ≈59% ITM Gamma 0.206 Theta -0.016 Vega 0.006 Open interest 132 Model this call Put · $6 Last $0.80 Breakeven $5.20 Implied vol 226.4% Delta -0.372 ≈37% ITM Gamma 0.109 Theta -0.029 Vega 0.006 Open interest 50 Model this put
Underlying $6.23
224	270	147.4%	0.434	$0.30		—	-0.5	200.9%	—	0
Call · $7 Last $0.30 Breakeven $7.30 Implied vol 147.4% Delta 0.434 ≈43% ITM Gamma 0.175 Theta -0.02 Vega 0.006 Open interest 224 Model this call Put · $7 In the money Last — Breakeven — Implied vol 200.9% Delta -0.5 ≈50% ITM Gamma 0.128 Theta -0.026 Vega 0.006 Open interest 0 Model this put
43	1	102.9%	0.189	$0.15		—	-0.672	160.9%	—	0
Call · $8 Last $0.15 Breakeven $8.15 Implied vol 102.9% Delta 0.189 ≈19% ITM Gamma 0.17 Theta -0.009 Vega 0.005 Open interest 43 Model this call Put · $8 In the money Last — Breakeven — Implied vol 160.9% Delta -0.672 ≈67% ITM Gamma 0.146 Theta -0.019 Vega 0.006 Open interest 0 Model this put
14	10	232.6%	0.363	$0.10		—	-0.864	121.4%	—	0
Call · $9 Last $0.10 Breakeven $9.10 Implied vol 232.6% Delta 0.363 ≈36% ITM Gamma 0.104 Theta -0.029 Vega 0.006 Open interest 14 Model this call Put · $9 In the money Last — Breakeven — Implied vol 121.4% Delta -0.864 ≈86% ITM Gamma 0.119 Theta -0.008 Vega 0.003 Open interest 0 Model this put

About this data

Greeks, implied volatility, open interest and the last price come from the latest daily snapshot and are 15-minute delayed. 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. Max pain is the listed strike where the most open interest would expire worthless — a positioning reference, not a forecast.

Key facts CIK 1526119 CUSIP 92337C203 13F (30d) 20 filings 20 filers Visit website Investor relations