ANAB · Anaptysbio, Inc

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$54.99 -0.14 (-0.25%) At close · Aug 5

Market Cap

$1.60B

29.10M

Options Chain

15-min delayed Underlying $54.99 · at close Aug 5, 2026 Options Calculator

Positioning

Aug 21, 2026 · 15 days to expiry · 66 contracts

Put / call OI

0.89

Balanced positioning

Open interest

1,233

contracts outstanding

Volume

235

traded today

Max pain

$55.00

$0.01 above spot

ATM implied vol

703.7%

market's expected move

Open interest by strike

Calls Puts

22.5

100

105

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 15d Sep 18 43d Nov 20 106d Feb 19 197d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	0.1%	1	—		—	-0.029	265.9%	—	0
Call · $22.5 In the money Last — Breakeven — Implied vol 0.1% Delta 1 ≈100% ITM Gamma 0 Theta -0.002 Vega 0 Open interest 0 Model this call Put · $22.5 Last — Breakeven — Implied vol 265.9% Delta -0.029 ≈3% ITM Gamma 0.002 Theta -0.063 Vega 0.007 Open interest 0 Model this put
2	20	0.1%	1	$62.00		—	-0.032	238.2%	—	1
Call · $25 In the money Last $62.00 Breakeven $87.00 Implied vol 0.1% Delta 1 ≈100% ITM Gamma 0 Theta -0.003 Vega 0 Open interest 2 Model this call Put · $25 Last — Breakeven — Implied vol 238.2% Delta -0.032 ≈3% ITM Gamma 0.003 Theta -0.062 Vega 0.008 Open interest 1 Model this put
3	—	0.1%	1	—		—	-0.044	196.7%	—	0
Call · $30 In the money Last — Breakeven — Implied vol 0.1% Delta 1 ≈100% ITM Gamma 0 Theta -0.003 Vega 0 Open interest 3 Model this call Put · $30 Last — Breakeven — Implied vol 196.7% Delta -0.044 ≈4% ITM Gamma 0.004 Theta -0.067 Vega 0.008 Open interest 0 Model this put
0	1	0.1%	1	$60.79		—	-0.059	156.3%	—	0
Call · $35 In the money Last $60.79 Breakeven $95.79 Implied vol 0.1% Delta 1 ≈100% ITM Gamma 0 Theta -0.004 Vega 0 Open interest 0 Model this call Put · $35 Last — Breakeven — Implied vol 156.3% Delta -0.059 ≈6% ITM Gamma 0.007 Theta -0.066 Vega 0.016 Open interest 0 Model this put
5	1	0.1%	1	$55.99		—	-0.081	120.7%	—	0
Call · $40 In the money Last $55.99 Breakeven $95.99 Implied vol 0.1% Delta 1 ≈100% ITM Gamma 0 Theta -0.004 Vega 0 Open interest 5 Model this call Put · $40 Last — Breakeven — Implied vol 120.7% Delta -0.081 ≈8% ITM Gamma 0.011 Theta -0.065 Vega 0.017 Open interest 0 Model this put
3	1	0.1%	1	$46.00		—	-0.093	78.4%	—	6
Call · $45 In the money Last $46.00 Breakeven $91.00 Implied vol 0.1% Delta 1 ≈100% ITM Gamma 0 Theta -0.005 Vega 0 Open interest 3 Model this call Put · $45 Last — Breakeven — Implied vol 78.4% Delta -0.093 ≈9% ITM Gamma 0.019 Theta -0.047 Vega 0.018 Open interest 6 Model this put
26	2	1809.3%	0.97	$42.00		$2.05	-0.147	46.3%	1	1
Call · $50 In the money Last $42.00 Breakeven $92.00 Implied vol 1809.3% Delta 0.97 ≈97% ITM Gamma 0 Theta -0.472 Vega 0.007 Open interest 26 Model this call Put · $50 Last $2.05 Breakeven $47.95 Implied vol 46.3% Delta -0.147 ≈15% ITM Gamma 0.044 Theta -0.038 Vega 0.028 Open interest 1 Model this put
Underlying $54.99
4	—	1397.5%	0.925	—		—	-0.48	10%	—	0
Call · $55 Last — Breakeven — Implied vol 1397.5% Delta 0.925 ≈92% ITM Gamma 0.001 Theta -0.758 Vega 0.016 Open interest 4 Model this call Put · $55 In the money Last — Breakeven — Implied vol 10% Delta -0.48 ≈48% ITM Gamma 0.366 Theta -0.013 Vega 0.045 Open interest 0 Model this put
21	1	1154.7%	0.877	$35.70		—	—	—	—	0
Call · $60 Last $35.70 Breakeven $95.70 Implied vol 1154.7% Delta 0.877 ≈88% ITM Gamma 0.001 Theta -0.884 Vega 0.023 Open interest 21 Model this call Put · $60 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
3	3	976.7%	0.826	$17.60		—	—	—	—	1
Call · $65 Last $17.60 Breakeven $82.60 Implied vol 976.7% Delta 0.826 ≈83% ITM Gamma 0.002 Theta -0.934 Vega 0.029 Open interest 3 Model this call Put · $65 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this put
6	4	835.2%	0.77	$24.45		—	—	—	—	0
Call · $70 Last $24.45 Breakeven $94.45 Implied vol 835.2% Delta 0.77 ≈77% ITM Gamma 0.003 Theta -0.936 Vega 0.035 Open interest 6 Model this call Put · $70 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
5	5	723.1%	0.71	$16.70		—	—	—	—	0
Call · $75 Last $16.70 Breakeven $91.70 Implied vol 723.1% Delta 0.71 ≈71% ITM Gamma 0.004 Theta -0.909 Vega 0.04 Open interest 5 Model this call Put · $75 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
4	1	638.3%	0.65	$7.50		—	—	—	—	0
Call · $80 Last $7.50 Breakeven $87.50 Implied vol 638.3% Delta 0.65 ≈65% ITM Gamma 0.005 Theta -0.871 Vega 0.044 Open interest 4 Model this call Put · $80 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	2	546.7%	0.572	$7.50		—	—	—	—	0
Call · $85 Last $7.50 Breakeven $92.50 Implied vol 546.7% Delta 0.572 ≈57% ITM Gamma 0.006 Theta -0.797 Vega 0.042 Open interest 0 Model this call Put · $85 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	1	472.8%	0.499	$4.80		—	—	—	—	0
Call · $90 Last $4.80 Breakeven $94.80 Implied vol 472.8% Delta 0.499 ≈50% ITM Gamma 0.007 Theta -0.691 Vega 0.045 Open interest 1 Model this call Put · $90 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	406.5%	0.412	—		—	—	—	—	0
Call · $95 Last — Breakeven — Implied vol 406.5% Delta 0.412 ≈41% ITM Gamma 0.008 Theta -0.58 Vega 0.048 Open interest 0 Model this call Put · $95 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	165.5%	0.058	—		—	-0.962	154.1%	—	0
Call · $100 Last — Breakeven — Implied vol 165.5% Delta 0.058 ≈6% ITM Gamma 0.006 Theta -0.07 Vega 0.016 Open interest 0 Model this call Put · $100 In the money Last — Breakeven — Implied vol 154.1% Delta -0.962 ≈96% ITM Gamma 0.005 Theta -0.042 Vega 0.007 Open interest 0 Model this put
0	—	176.2%	0.055	—		—	-0.977	149.9%	—	0
Call · $105 Last — Breakeven — Implied vol 176.2% Delta 0.055 ≈6% ITM Gamma 0.006 Theta -0.072 Vega 0.016 Open interest 0 Model this call Put · $105 In the money Last — Breakeven — Implied vol 149.9% Delta -0.977 ≈98% ITM Gamma 0.004 Theta -0.025 Vega 0.007 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 1370053 CUSIP 032724106 13F (30d) 35 filings 35 filers Visit website Investor relations