VSTM · Verastem, Inc. · Options Chain

Track VSTM — free

$7.32 -0.30 (-3.94%) At close · Sep 11

Russell 2000 member Rebalance outlook locked

Market Cap

$669.72M

90.56M

Options Chain

Underlying $7.32 · at close Sep 11, 2026 Options Calculator

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Positioning

Sep 18, 2026 · 6 days to expiry · 30 contracts · mixed daily-bar sessions · Feb 11, 2026–Sep 11, 2026; 8 unknown

Put / call OI

0.23

Call-heavy positioning

Open interest

3,945

as of Sep 10, 2026

Volume

—

dated and unknown daily-bar sessions

Max pain

$5.00

$2.32 below spot

ATM implied vol

193.5%

market's expected move

Open interest by strike

Calls Puts

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Sep 18 6d Oct 16 34d Nov 20 69d Dec 18 97d Jan 15 125d Mar 19 188d Jan 21 496d

Calls								Puts
OI	Vol	IV	Δ	Bid	Ask	Last	Strike	Last	Bid	Ask	Δ	IV	Vol	OI
1	2	—	—	$4.20	$9.00	$2.75		—	$0.00	$0.05	—	—	—	—
Call · $1 In the money Daily-bar session Jun 8, 2026 Quote as of 2026-09-11 19:59:39.178 UTC Last $2.75 Breakeven $3.75 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 10, 2026 Model this call Put · $1 Daily-bar session Unknown Quote as of 2026-09-11 13:31:05.698 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
4	1	—	—	$3.10	$8.00	$4.90		$0.25	$0.00	$0.05	—	—	2	2
Call · $2 In the money Daily-bar session Aug 21, 2026 Quote as of 2026-09-11 19:59:51.420 UTC Last $4.90 Breakeven $6.90 Implied vol — Delta — Gamma — Theta — Vega — Open interest 4 OI effective date Sep 10, 2026 Model this call Put · $2 Daily-bar session Jul 31, 2026 Quote as of 2026-09-11 13:30:30.642 UTC Last $0.25 Breakeven $1.75 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 10, 2026 Model this put
321	2	—	—	$2.20	$7.00	$5.20		$0.03	$0.00	$0.05	—	—	10	105
Call · $3 In the money Daily-bar session Sep 8, 2026 Quote as of 2026-09-11 19:59:39.211 UTC Last $5.20 Breakeven $8.20 Implied vol — Delta — Gamma — Theta — Vega — Open interest 321 OI effective date Sep 10, 2026 Model this call Put · $3 Daily-bar session Sep 1, 2026 Quote as of 2026-09-11 16:17:52.052 UTC Last $0.03 Breakeven $2.97 Implied vol — Delta — Gamma — Theta — Vega — Open interest 105 OI effective date Sep 10, 2026 Model this put
39	2	—	—	$1.30	$6.00	$4.10		$0.05	$0.00	$0.10	—	—	59	225
Call · $4 In the money Daily-bar session Sep 8, 2026 Quote as of 2026-09-11 19:59:39.178 UTC Last $4.10 Breakeven $8.10 Implied vol — Delta — Gamma — Theta — Vega — Open interest 39 OI effective date Sep 10, 2026 Model this call Put · $4 Daily-bar session Sep 11, 2026 Quote as of 2026-09-11 17:46:51.454 UTC Last $0.05 Breakeven $3.95 Implied vol — Delta — Gamma — Theta — Vega — Open interest 225 OI effective date Sep 10, 2026 Model this put
56	3	—	—	$0.60	$4.90	$3.50		$0.05	$0.00	$0.10	—	—	10	32
Call · $5 In the money Daily-bar session Sep 8, 2026 Quote as of 2026-09-11 19:59:39.183 UTC Last $3.50 Breakeven $8.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 56 OI effective date Sep 10, 2026 Model this call Put · $5 Daily-bar session Sep 10, 2026 Quote as of 2026-09-11 16:16:42.300 UTC Last $0.05 Breakeven $4.95 Implied vol — Delta — Gamma — Theta — Vega — Open interest 32 OI effective date Sep 10, 2026 Model this put
61	3	—	—	$0.10	$4.90	$2.25		$0.12	$0.00	$0.15	—	—	2	149
Call · $6 In the money Daily-bar session Sep 8, 2026 Quote as of 2026-09-11 19:59:39.185 UTC Last $2.25 Breakeven $8.25 Implied vol — Delta — Gamma — Theta — Vega — Open interest 61 OI effective date Sep 10, 2026 Model this call Put · $6 Daily-bar session Sep 8, 2026 Quote as of 2026-09-11 16:16:29.468 UTC Last $0.12 Breakeven $5.88 Implied vol — Delta — Gamma — Theta — Vega — Open interest 149 OI effective date Sep 10, 2026 Model this put
856	19	193.5%	0.643	$0.45	$1.45	$1.47		$0.27	$0.00	$0.90	—	—	1	181
Call · $7 In the money Daily-bar session Sep 8, 2026 Quote as of 2026-09-11 19:59:40.645 UTC Last $1.47 Breakeven $8.47 Implied vol 193.5% Delta 0.643 ≈64% ITM Gamma 0.202 Theta -0.058 Vega 0.004 Open interest 856 OI effective date Sep 10, 2026 Model this call Put · $7 Daily-bar session Sep 11, 2026 Quote as of 2026-09-11 19:59:39.173 UTC Last $0.27 Breakeven $6.73 Implied vol — Delta — Gamma — Theta — Vega — Open interest 181 OI effective date Sep 10, 2026 Model this put
Underlying $7.32
1.7k	21	—	—	$0.00	$0.20	$0.15		$0.50	$0.00	$2.00	—	—	25	31
Call · $8 Daily-bar session Sep 11, 2026 Quote as of 2026-09-11 19:57:28.200 UTC Last $0.15 Breakeven $8.15 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1.7k OI effective date Sep 10, 2026 Model this call Put · $8 In the money Daily-bar session Sep 10, 2026 Quote as of 2026-09-11 19:59:33.640 UTC Last $0.50 Breakeven $7.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 31 OI effective date Sep 10, 2026 Model this put
104	111	—	—	$0.00	$1.50	$0.15		$5.30	$0.00	$3.00	—	—	1	—
Call · $9 Daily-bar session Sep 8, 2026 Quote as of 2026-09-11 19:59:39.211 UTC Last $0.15 Breakeven $9.15 Implied vol — Delta — Gamma — Theta — Vega — Open interest 104 OI effective date Sep 10, 2026 Model this call Put · $9 In the money Daily-bar session Jun 26, 2026 Quote as of 2026-09-11 19:59:34.940 UTC Last $5.30 Breakeven $3.70 Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
63	1	—	—	$0.00	$0.10	$0.05		—	$2.00	$3.80	—	—	—	—
Call · $10 Daily-bar session Sep 9, 2026 Quote as of 2026-09-11 13:31:35.274 UTC Last $0.05 Breakeven $10.05 Implied vol — Delta — Gamma — Theta — Vega — Open interest 63 OI effective date Sep 10, 2026 Model this call Put · $10 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:01.682 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
12	1	—	—	$0.00	$2.05	$0.05		—	$1.05	$5.90	—	—	—	—
Call · $11 Daily-bar session Aug 26, 2026 Quote as of 2026-09-11 13:30:33.873 UTC Last $0.05 Breakeven $11.05 Implied vol — Delta — Gamma — Theta — Vega — Open interest 12 OI effective date Sep 10, 2026 Model this call Put · $11 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:01.967 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
2	1	—	—	$0.00	$4.90	$0.15		—	$2.00	$6.80	—	—	—	—
Call · $12 Daily-bar session Mar 24, 2026 Quote as of 2026-09-11 16:56:53.621 UTC Last $0.15 Breakeven $12.15 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 10, 2026 Model this call Put · $12 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:02.993 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
1	1	—	—	$0.00	$4.90	$0.90		—	$3.00	$7.80	—	—	—	—
Call · $13 Daily-bar session Feb 11, 2026 Quote as of 2026-09-11 16:56:53.621 UTC Last $0.90 Breakeven $13.90 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 10, 2026 Model this call Put · $13 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:02.993 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
2	1	—	—	$0.00	$4.90	$0.12		—	$4.00	$8.80	—	—	—	—
Call · $14 Daily-bar session Aug 17, 2026 Quote as of 2026-09-11 16:56:53.621 UTC Last $0.12 Breakeven $14.12 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 10, 2026 Model this call Put · $14 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:02.993 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$2.40	—		—	$5.00	$9.80	—	—	—	—
Call · $15 Daily-bar session Unknown Quote as of 2026-09-11 19:59:39.177 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $15 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:02.993 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put

About this data

Each contract's last price, day range and volume belong to the daily-bar session shown in its details; unknown means the source omitted that timestamp. Open interest has its own effective date shown separately; implied volatility and greeks are model values computed when fetched. This chain has mixed daily-bar sessions · Feb 11, 2026–Sep 11, 2026; 8 unknown. Positioning totals are shown only when every returned open-interest value has the same known effective date. Bid and ask are real-time consolidated OPRA readings.

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) 88 filings 88 filers Visit website Investor relations