ANNX · Annexon, Inc.

Track ANNX — free

$5.07 -0.11 (-2.12%) At close · Aug 21

Market Cap

$1.06B

204.44M

Options Chain

Underlying $5.07 · at close Aug 21, 2026 Options Calculator

Positioning

Sep 18, 2026 · 27 days to expiry · 22 contracts · mixed snapshot sessions · Jul 17, 2026–Aug 21, 2026; 15 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

—

dated and unknown snapshot sessions

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Sep 18 27d Oct 16 55d Dec 18 118d Jan 15 146d Apr 16 237d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	460.9%	0.973	—		—	—	—	—	0
Call · $1 In the money Snapshot session Unknown Last — Breakeven — Implied vol 460.9% Delta 0.973 ≈97% ITM Gamma 0.009 Theta -0.007 Vega 0.001 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	—	272.3%	0.949	—		$0.10	—	—	1	1
Call · $2 In the money Snapshot session Unknown Last — Breakeven — Implied vol 272.3% Delta 0.949 ≈95% ITM Gamma 0.027 Theta -0.007 Vega 0.001 Open interest 0 Model this call Put · $2 Snapshot session Aug 20, 2026 Last $0.10 Breakeven $1.90 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this put
0	—	228.3%	0.88	—		—	-0.12	625.7%	—	0
Call · $3 In the money Snapshot session Unknown Last — Breakeven — Implied vol 228.3% Delta 0.88 ≈88% ITM Gamma 0.062 Theta -0.012 Vega 0.003 Open interest 0 Model this call Put · $3 Snapshot session Unknown Last — Breakeven — Implied vol 625.7% Delta -0.12 ≈12% ITM Gamma 0.022 Theta -0.033 Vega 0.003 Open interest 0 Model this put
4	1	374.8%	0.777	$1.65		—	-0.224	177.2%	—	0
Call · $4 In the money Snapshot session Aug 6, 2026 Last $1.65 Breakeven $5.65 Implied vol 374.8% Delta 0.777 ≈78% ITM Gamma 0.056 Theta -0.029 Vega 0.004 Open interest 4 Model this call Put · $4 Snapshot session Unknown Last — Breakeven — Implied vol 177.2% Delta -0.224 ≈22% ITM Gamma 0.12 Theta -0.014 Vega 0.004 Open interest 0 Model this put
21	10	98.9%	0.595	$0.96		$0.45	-0.407	83.9%	101	5
Call · $5 In the money Snapshot session Aug 12, 2026 Last $0.96 Breakeven $5.96 Implied vol 98.9% Delta 0.595 ≈59% ITM Gamma 0.281 Theta -0.01 Vega 0.005 Open interest 21 Model this call Put · $5 Snapshot session Aug 21, 2026 Last $0.45 Breakeven $4.55 Implied vol 83.9% Delta -0.407 ≈41% ITM Gamma 0.332 Theta -0.008 Vega 0.005 Open interest 5 Model this put
Underlying $5.07
845	50	118.6%	0.379	$0.21		$1.02	-0.669	98.4%	1	0
Call · $6 Snapshot session Aug 21, 2026 Last $0.21 Breakeven $6.21 Implied vol 118.6% Delta 0.379 ≈38% ITM Gamma 0.229 Theta -0.012 Vega 0.005 Open interest 845 Model this call Put · $6 In the money Snapshot session Aug 21, 2026 Last $1.02 Breakeven $4.98 Implied vol 98.4% Delta -0.669 ≈67% ITM Gamma 0.265 Theta -0.009 Vega 0.005 Open interest 0 Model this put
0	—	170.3%	0.335	—		$1.25	-0.659	174.1%	1	1
Call · $7 Snapshot session Unknown Last — Breakeven — Implied vol 170.3% Delta 0.335 ≈33% ITM Gamma 0.153 Theta -0.016 Vega 0.006 Open interest 0 Model this call Put · $7 In the money Snapshot session Jul 17, 2026 Last $1.25 Breakeven $5.75 Implied vol 174.1% Delta -0.659 ≈66% ITM Gamma 0.151 Theta -0.016 Vega 0.006 Open interest 1 Model this put
0	—	213.9%	0.321	—		—	—	—	—	0
Call · $8 Snapshot session Unknown Last — Breakeven — Implied vol 213.9% Delta 0.321 ≈32% ITM Gamma 0.12 Theta -0.02 Vega 0.004 Open interest 0 Model this call Put · $8 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	—	—	—		—	—	—	—	0
Call · $9 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $9 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	—	—	—		—	—	—	—	0
Call · $10 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $10 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	—	—	—		—	—	—	—	0
Call · $11 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $11 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 · Jul 17, 2026–Aug 21, 2026; 15 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 1528115 CUSIP 03589W102 13F (30d) 202 filings 199 filers Visit website Investor relations