FULC · Fulcrum Therapeutics, Inc.

Track FULC — free

$3.74 +0.03 (+0.81%) At close · Aug 14

Market Cap

$285.35M

76.30M

Options Chain

Underlying $3.74 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 4 days to expiry · 14 contracts · mixed snapshot sessions · Jun 22, 2026–Jul 31, 2026; 6 unknown

Put / call OI

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dated and unknown snapshot sessions

Open interest

—

dated and unknown snapshot sessions

Volume

—

dated and unknown snapshot sessions

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 4d Sep 18 32d Dec 18 123d Jan 15 151d Mar 19 214d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	—	—	—		—	—	—	—	0
Call · $1 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $1 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	—	—	—		$0.20	—	—	1	1
Call · $2 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $2 Snapshot session Jul 10, 2026 Last $0.20 Breakeven $1.80 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this put
3	3	—	—	$0.89		$0.04	-0.146	203.1%	2	878
Call · $3 In the money Snapshot session Jun 26, 2026 Last $0.89 Breakeven $3.89 Implied vol — Delta — Gamma — Theta — Vega — Open interest 3 Model this call Put · $3 Snapshot session Jul 31, 2026 Last $0.04 Breakeven $2.96 Implied vol 203.1% Delta -0.146 ≈15% ITM Gamma 0.26 Theta -0.021 Vega 0.001 Open interest 878 Model this put
Underlying $3.74
446	30	160.5%	0.394	$0.15		$0.46	-0.611	156.3%	73	94
Call · $4 Snapshot session Jul 29, 2026 Last $0.15 Breakeven $4.15 Implied vol 160.5% Delta 0.394 ≈39% ITM Gamma 0.564 Theta -0.028 Vega 0.002 Open interest 446 Model this call Put · $4 In the money Snapshot session Jul 30, 2026 Last $0.46 Breakeven $3.54 Implied vol 156.3% Delta -0.611 ≈61% ITM Gamma 0.579 Theta -0.027 Vega 0.002 Open interest 94 Model this put
10	10	245.9%	0.191	$0.11		$1.10	-0.938	154.9%	2	1
Call · $5 Snapshot session Jun 24, 2026 Last $0.11 Breakeven $5.11 Implied vol 245.9% Delta 0.191 ≈19% ITM Gamma 0.256 Theta -0.03 Vega 0.001 Open interest 10 Model this call Put · $5 In the money Snapshot session Jul 23, 2026 Last $1.10 Breakeven $3.90 Implied vol 154.9% Delta -0.938 ≈94% ITM Gamma 0.186 Theta -0.008 Vega 0.001 Open interest 1 Model this put
0	—	—	—	—		—	-0.954	228.3%	—	0
Call · $6 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $6 In the money Snapshot session Unknown Last — Breakeven — Implied vol 228.3% Delta -0.954 ≈95% ITM Gamma 0.1 Theta -0.009 Vega 0.001 Open interest 0 Model this put
1	1	—	—	$0.05		—	-0.925	332.6%	—	0
Call · $7 Snapshot session Jun 22, 2026 Last $0.05 Breakeven $7.05 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this call Put · $7 In the money Snapshot session Unknown Last — Breakeven — Implied vol 332.6% Delta -0.925 ≈92% ITM Gamma 0.099 Theta -0.02 Vega 0.001 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 22, 2026–Jul 31, 2026; 6 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.

Key facts CIK 1680581 CUSIP 359616109 13F (30d) 152 filings 146 filers Visit website Investor relations