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: Jan 21, 2028
Days to expiration: 468
Share price: $37.07
Put/call ratio (OI): 2.00
Put/call ratio (volume): 3.50
ATM implied volatility: 51.8%
Expected move: ±$21.72
Open interest (C / P): 23 / 46

GMAB options summary

The GMAB options chain for the January 21, 2028 expiration lists 2 call and 5 put contracts, with 468 days until expiration. Open interest stands at 23 calls and 46 puts, a put/call ratio of 2.00, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $35.00 strike is 51.8%, which implies the market expects a move of about ±$21.72 (58.6%) in Genmab A/S stock by expiration.

The most open interest sits at the $35.00 call (21 contracts) and the $45.00 put (17 contracts).

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

GMAB options chain · January 21, 2028

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
—	—	—	—	—	—	17.50	0.20	0.50	0.50	47.6%	2	11
—	—	—	—	—	—	20.00	0.00	2.75	0.80	54.7%	—	5
21	3	56.4%	8.10	6.30	10.10	35.00	2.40	6.60	5.00	47.2%	1	12
GMAB $37.07
2	1	53.0%	5.56	3.80	7.70	40.00	—	—	—	—	—	—
—	—	—	—	—	—	45.00	8.30	12.40	12.80	42.6%	11	17
—	—	—	—	—	—	50.00	12.20	16.30	16.70	42.8%	—	1

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 January 21, 2028 expiration, the GMAB put/call ratio based on open interest is 2.00 (46 puts vs 23 calls), and 3.50 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 January 21, 2028 is about 51.8%, 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.