ANAB · Anaptysbio, Inc · Options Chain

Track ANAB — free

$55.20 +0.14 (+0.25%) At close · Sep 18

Russell 2000 member Rebalance outlook locked

Market Cap

$1.59B

29.10M

Options Chain

Underlying $55.20 · at close Sep 18, 2026 Options Calculator

Pull option chains with greeks and open interest through the options chain API or MCP →

Positioning

Oct 16, 2026 · 25 days to expiry · 26 contracts · mixed daily-bar sessions · Aug 31, 2026–Sep 18, 2026; 16 unknown

Put / call OI

0.57

Call-heavy positioning

Open interest

179

as of Sep 17, 2026

Volume

—

dated and unknown daily-bar sessions

Max pain

$55.00

$0.20 below spot

ATM implied vol

70.3%

market's expected move

Open interest by strike

Calls Puts

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Oct 16 25d Nov 20 60d Feb 19 151d May 21 242d

Calls								Puts
OI	Vol	IV	Δ	Bid	Ask	Last	Strike	Last	Bid	Ask	Δ	IV	Vol	OI
—	—	—	—	$23.00	$27.10	—		—	$0.00	$4.90	—	—	—	—
Call · $30 In the money Daily-bar session Unknown Quote as of 2026-09-18 19:58:53.174 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $30 Daily-bar session Unknown Quote as of 2026-09-18 13:46:29.891 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	88.6%	0.98	$18.00	$22.80	—		—	$0.00	$4.90	—	—	—	—
Call · $35 In the money Daily-bar session Unknown Quote as of 2026-09-18 19:59:52.321 UTC Last — Breakeven — Implied vol 88.6% Delta 0.98 ≈98% ITM Gamma 0.004 Theta -0.016 Vega 0.007 Open interest — OI effective date — Model this call Put · $35 Daily-bar session Unknown Quote as of 2026-09-18 14:30:00.070 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	56.5%	0.987	$13.00	$17.70	—		$0.50	$0.00	$4.90	—	—	1	1
Call · $40 In the money Daily-bar session Unknown Quote as of 2026-09-18 19:58:53.111 UTC Last — Breakeven — Implied vol 56.5% Delta 0.987 ≈99% ITM Gamma 0.004 Theta -0.01 Vega 0.005 Open interest — OI effective date — Model this call Put · $40 Daily-bar session Aug 31, 2026 Quote as of 2026-09-18 14:30:00.070 UTC Last $0.50 Breakeven $39.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 17, 2026 Model this put
—	—	68.2%	0.89	$8.50	$13.30	—		$0.75	$0.00	$4.90	—	—	2	4
Call · $45 In the money Daily-bar session Unknown Quote as of 2026-09-18 19:58:42.125 UTC Last — Breakeven — Implied vol 68.2% Delta 0.89 ≈89% ITM Gamma 0.019 Theta -0.04 Vega 0.028 Open interest — OI effective date — Model this call Put · $45 Daily-bar session Sep 9, 2026 Quote as of 2026-09-18 19:55:01.857 UTC Last $0.75 Breakeven $44.25 Implied vol — Delta — Gamma — Theta — Vega — Open interest 4 OI effective date Sep 17, 2026 Model this put
10	10	56.1%	0.775	$4.50	$8.50	$9.00		—	$0.10	$4.90	-0.286	84.2%	—	—
Call · $50 In the money Daily-bar session Sep 8, 2026 Quote as of 2026-09-18 19:59:19.027 UTC Last $9.00 Breakeven $59.00 Implied vol 56.1% Delta 0.775 ≈77% ITM Gamma 0.036 Theta -0.052 Vega 0.044 Open interest 10 OI effective date Sep 17, 2026 Model this call Put · $50 Daily-bar session Unknown Quote as of 2026-09-18 19:59:53.064 UTC Last — Breakeven — Implied vol 84.2% Delta -0.286 ≈29% ITM Gamma 0.027 Theta -0.079 Vega 0.05 Open interest — OI effective date — Model this put
74	2	66.6%	0.55	$2.65	$5.50	$4.07		$4.27	$2.80	$5.50	-0.448	73.9%	1	30
Call · $55 In the money Daily-bar session Sep 18, 2026 Quote as of 2026-09-18 19:59:58.364 UTC Last $4.07 Breakeven $59.07 Implied vol 66.6% Delta 0.55 ≈55% ITM Gamma 0.04 Theta -0.078 Vega 0.058 Open interest 74 OI effective date Sep 17, 2026 Model this call Put · $55 Daily-bar session Sep 15, 2026 Quote as of 2026-09-18 19:59:59.374 UTC Last $4.27 Breakeven $50.73 Implied vol 73.9% Delta -0.448 ≈45% ITM Gamma 0.036 Theta -0.08 Vega 0.058 Open interest 30 OI effective date Sep 17, 2026 Model this put
Underlying $55.20
26	9	56.1%	0.322	$0.85	$2.35	$1.60		$6.38	$5.00	$8.80	-0.637	68.4%	20	20
Call · $60 Daily-bar session Sep 18, 2026 Quote as of 2026-09-18 19:59:56.387 UTC Last $1.60 Breakeven $61.60 Implied vol 56.1% Delta 0.322 ≈32% ITM Gamma 0.043 Theta -0.059 Vega 0.053 Open interest 26 OI effective date Sep 17, 2026 Model this call Put · $60 In the money Daily-bar session Sep 9, 2026 Quote as of 2026-09-18 19:58:35.271 UTC Last $6.38 Breakeven $53.62 Implied vol 68.4% Delta -0.637 ≈64% ITM Gamma 0.037 Theta -0.068 Vega 0.055 Open interest 20 OI effective date Sep 17, 2026 Model this put
2	2	—	—	$0.00	$4.20	$1.90		$10.05	$9.00	$13.00	-0.763	73.9%	10	10
Call · $65 Daily-bar session Sep 8, 2026 Quote as of 2026-09-18 19:59:03.922 UTC Last $1.90 Breakeven $66.90 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 17, 2026 Model this call Put · $65 In the money Daily-bar session Sep 1, 2026 Quote as of 2026-09-18 19:59:57.872 UTC Last $10.05 Breakeven $54.95 Implied vol 73.9% Delta -0.763 ≈76% ITM Gamma 0.028 Theta -0.059 Vega 0.046 Open interest 10 OI effective date Sep 17, 2026 Model this put
—	—	—	—	$0.00	$2.25	—		—	$14.00	$17.50	-0.817	86.3%	—	—
Call · $70 Daily-bar session Unknown Quote as of 2026-09-18 19:59:17.370 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $70 In the money Daily-bar session Unknown Quote as of 2026-09-18 19:55:24.407 UTC Last — Breakeven — Implied vol 86.3% Delta -0.817 ≈82% ITM Gamma 0.021 Theta -0.058 Vega 0.039 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.90	—		—	$18.50	$22.30	-0.868	91.8%	—	—
Call · $75 Daily-bar session Unknown Quote as of 2026-09-18 14:30:00.070 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $75 In the money Daily-bar session Unknown Quote as of 2026-09-18 19:55:05.962 UTC Last — Breakeven — Implied vol 91.8% Delta -0.868 ≈87% ITM Gamma 0.016 Theta -0.048 Vega 0.032 Open interest — OI effective date — Model this put
2	1	—	—	$0.00	$4.90	$0.40		—	$23.00	$27.30	-0.905	96.1%	—	—
Call · $80 Daily-bar session Sep 3, 2026 Quote as of 2026-09-18 14:30:00.070 UTC Last $0.40 Breakeven $80.40 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 17, 2026 Model this call Put · $80 In the money Daily-bar session Unknown Quote as of 2026-09-18 19:55:02.216 UTC Last — Breakeven — Implied vol 96.1% Delta -0.905 ≈90% ITM Gamma 0.012 Theta -0.038 Vega 0.025 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.90	—		—	$28.00	$32.30	—	—	—	—
Call · $85 Daily-bar session Unknown Quote as of 2026-09-18 14:30:00.070 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $85 In the money Daily-bar session Unknown Quote as of 2026-09-18 19:55:06.696 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.90	—		—	$33.00	$37.30	—	—	—	—
Call · $90 Daily-bar session Unknown Quote as of 2026-09-18 13:46:25.285 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $90 In the money Daily-bar session Unknown Quote as of 2026-09-18 19:55:07.092 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 · Aug 31, 2026–Sep 18, 2026; 16 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 1370053 CUSIP 032724106 13F (30d) 6 filings 5 filers Visit website Investor relations