AnaptysBio (ANAB) Options Chain

NASDAQ: ANABHealth CareBiotechnology: Pharmaceutical PreparationsUSD

45.95-0.26 (-0.56%)

At close: Oct 9, 4:00 PM ET · Delayed 15 min

Expiration date

Expiration: Nov 20, 2026
Days to expiration: 40
Share price: $45.95
Put/call ratio (OI): 2.15
Put/call ratio (volume): 0.48
ATM implied volatility: 86.8%
Expected move: ±$13.21
Open interest (C / P): 369 / 792

ANAB options summary

The ANAB options chain for the November 20, 2026 expiration lists 16 call and 10 put contracts, with 40 days until expiration. Open interest stands at 369 calls and 792 puts, a put/call ratio of 2.15, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $45.00 strike is 86.8%, which implies the market expects a move of about ±$13.21 (28.7%) in AnaptysBio stock by expiration.

The most open interest sits at the $65.00 call (179 contracts) and the $40.00 put (544 contracts).

Summary generated from market data by MetaCap's automated system. Methodology

ANAB options chain · November 20, 2026

ANAB calls and puts by strike price. Shaded cells are in the money.
Calls							Puts
OI	Vol	IV	Last	Bid	Ask	Strike	Bid	Ask	Last	IV	Vol	OI
1	—	365.2%	48.71	26.00	30.90	25.00	0.00	4.80	0.90	207.9%	1	12
—	—	—	—	—	—	30.00	0.00	4.90	1.15	162.4%	1	1
7	6	337.4%	20.48	21.00	25.50	35.00	0.00	1.25	1.35	72.0%	1	150
2	2	96.7%	11.00	7.00	11.00	40.00	2.35	4.90	2.50	107.7%	8	544
15	1	91.8%	8.30	4.10	8.00	45.00	2.30	6.70	4.41	81.8%	1	49
ANAB $45.95
11	1	90.8%	3.40	2.00	6.00	50.00	5.00	9.50	7.00	77.7%	1	9
58	20	88.0%	3.11	0.00	4.90	55.00	8.50	13.30	6.60	76.9%	1	17
64	1	106.5%	4.05	0.00	4.90	60.00	12.50	17.20	12.50	70.5%	7	6
179	2	122.3%	3.75	0.00	4.90	65.00	—	—	—	—	—	—
28	4	136.1%	3.40	0.00	4.90	70.00	21.50	26.30	15.65	131.9%	—	1
0	2	25.0%	3.55	0.00	0.00	75.00	20.00	24.90	24.50	—	—	3
2	1	158.3%	0.05	0.00	4.80	80.00	—	—	—	—	—	—
0	1	291.6%	9.00	7.70	10.70	85.00	—	—	—	—	—	—
0	—	50.0%	2.00	0.00	0.00	90.00	—	—	—	—	—	—
0	1	50.0%	1.85	0.00	0.00	95.00	—	—	—	—	—	—
2	2	192.7%	2.03	0.00	4.70	100.00	—	—	—	—	—	—
0	—	50.0%	1.00	0.00	0.00	105.00	—	—	—	—	—	—

In-the-money callsIn-the-money puts. IV = implied volatility, OI = open interest (contracts). Each contract covers 100 shares. Quotes delayed at least 15 minutes.

Frequently asked questions

What is the ANAB put/call ratio?

For the November 20, 2026 expiration, the ANAB put/call ratio based on open interest is 2.15 (792 puts vs 369 calls), and 0.48 based on today's volume. A ratio above 1 means more puts than calls.

What is ANAB's implied volatility?

At-the-money implied volatility for ANAB options expiring November 20, 2026 is about 86.8%, an annualized estimate of how much the market expects AnaptysBio stock to move.

How many ANAB option expiration dates are there?

ANAB has 4 listed expiration dates, from Oct 16, 2026 to May 21, 2027.

What does "in the money" mean?

A call is in the money when the strike price is below the current share price; a put is in the money when the strike is above it. In-the-money contracts have intrinsic value and are shaded in the table.