Genmab A/S (GMAB) Options Chain

NASDAQ: GMABHealth CareBiotechnology: Pharmaceutical PreparationsUSD

37.07+1.02 (+2.83%)

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

Expiration date

Expiration: Dec 18, 2026
Days to expiration: 68
Share price: $37.07
Put/call ratio (OI): 0.06
Put/call ratio (volume): 0.02
ATM implied volatility: 55.0%
Expected move: ±$8.79
Open interest (C / P): 51.84K / 3.08K

GMAB options summary

The GMAB options chain for the December 18, 2026 expiration lists 8 call and 8 put contracts, with 68 days until expiration. Open interest stands at 51,842 calls and 3,083 puts, a put/call ratio of 0.06, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $35.00 strike is 55.0%, which implies the market expects a move of about ±$8.79 (23.7%) in Genmab A/S stock by expiration.

The most open interest sits at the $40.00 call (21.41K contracts) and the $35.00 put (1.17K contracts).

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

GMAB options chain · December 18, 2026

GMAB 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
—	—	—	—	—	—	15.00	0.00	1.20	0.05	152.7%	5	286
—	—	—	—	—	—	17.50	0.00	2.85	0.60	168.7%	1	13
19	1	72.3%	19.10	15.20	19.10	20.00	0.00	2.95	1.45	146.1%	1	98
—	—	—	15.44	—	—	22.50	0.00	2.25	0.15	113.0%	5	484
300	3	65.6%	10.26	10.40	14.40	25.00	0.00	2.35	0.60	96.4%	1	108
8,568	10,145	57.8%	8.94	6.00	10.00	30.00	0.00	2.90	1.61	70.0%	1	926
1,661	25	59.8%	6.66	2.80	6.90	35.00	0.70	3.70	2.90	50.1%	34	1,168
GMAB $37.07
21,415	309	57.2%	2.55	2.25	2.80	40.00	4.80	5.80	5.30	54.8%	216	0
1,889	30	62.6%	1.35	0.00	1.55	45.00	—	—	—	—	—	—
17,990	52	62.0%	0.81	0.50	1.05	50.00	—	—	—	—	—	—

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 GMAB put/call ratio?

For the December 18, 2026 expiration, the GMAB put/call ratio based on open interest is 0.06 (3,083 puts vs 51,842 calls), and 0.02 based on today's volume. A ratio above 1 means more puts than calls.

What is GMAB's implied volatility?

At-the-money implied volatility for GMAB options expiring December 18, 2026 is about 55.0%, an annualized estimate of how much the market expects Genmab A/S stock to move.

How many GMAB option expiration dates are there?

GMAB has 8 listed expiration dates, from Oct 16, 2026 to Jan 19, 2029.

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.