GMAB · Genmab A/S

Track GMAB — free Ask ALVIS about GMAB

$28.52 -0.48 (-1.66%) At close · Jul 29

Market Cap

$17.51B

613.94M

Options Chain

15-min delayed Underlying $28.52 · today Options Calculator

Positioning

Aug 21, 2026 · 22 days to expiry · 20 contracts

Put / call OI

0.12

Call-heavy positioning

Open interest

35,630

contracts outstanding

Volume

115

traded today

Max pain

$30.00

$1.48 above spot

ATM implied vol

66.8%

market's expected move

Open interest by strike

Calls Puts

17.5

22.5

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 22d Sep 18 50d Nov 20 113d Dec 18 141d Jan 15 169d Feb 19 204d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	216.8%	0.924	—		$0.25	—	—	2	7
Call · $15 In the money Last — Breakeven — Implied vol 216.8% Delta 0.924 ≈92% ITM Gamma 0.01 Theta -0.05 Vega 0.009 Open interest 0 Model this call Put · $15 Last $0.25 Breakeven $14.75 Implied vol — Delta — Gamma — Theta — Vega — Open interest 7 Model this put
15	1	177%	0.902	$7.65		$0.11	-0.07	145.2%	15	267
Call · $17.5 In the money Last $7.65 Breakeven $25.15 Implied vol 177% Delta 0.902 ≈90% ITM Gamma 0.014 Theta -0.049 Vega 0.014 Open interest 15 Model this call Put · $17.5 Last $0.11 Breakeven $17.39 Implied vol 145.2% Delta -0.07 ≈7% ITM Gamma 0.013 Theta -0.03 Vega 0.01 Open interest 267 Model this put
105	1	156.5%	0.854	$8.24		$0.25	-0.062	95.3%	4	691
Call · $20 In the money Last $8.24 Breakeven $28.24 Implied vol 156.5% Delta 0.854 ≈85% ITM Gamma 0.021 Theta -0.057 Vega 0.015 Open interest 105 Model this call Put · $20 Last $0.25 Breakeven $19.75 Implied vol 95.3% Delta -0.062 ≈6% ITM Gamma 0.018 Theta -0.018 Vega 0.01 Open interest 691 Model this put
11	1	114.1%	0.82	$6.34		$0.45	-0.135	88.2%	9	14
Call · $22.5 In the money Last $6.34 Breakeven $28.84 Implied vol 114.1% Delta 0.82 ≈82% ITM Gamma 0.033 Theta -0.048 Vega 0.016 Open interest 11 Model this call Put · $22.5 Last $0.45 Breakeven $22.05 Implied vol 88.2% Delta -0.135 ≈14% ITM Gamma 0.035 Theta -0.029 Vega 0.016 Open interest 14 Model this put
20	1	101.5%	0.717	$4.25		$0.60	-0.248	77.5%	10	1.2k
Call · $25 In the money Last $4.25 Breakeven $29.25 Implied vol 101.5% Delta 0.717 ≈72% ITM Gamma 0.048 Theta -0.055 Vega 0.023 Open interest 20 Model this call Put · $25 Last $0.60 Breakeven $24.40 Implied vol 77.5% Delta -0.248 ≈25% ITM Gamma 0.059 Theta -0.037 Vega 0.023 Open interest 1.2k Model this put
Underlying $28.52
16.4k	1	66.8%	0.372	$1.15		$1.90	—	—	8	1.6k
Call · $30 Last $1.15 Breakeven $31.15 Implied vol 66.8% Delta 0.372 ≈37% ITM Gamma 0.082 Theta -0.04 Vega 0.025 Open interest 16.4k Model this call Put · $30 In the money Last $1.90 Breakeven $28.10 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1.6k Model this put
3k	1	81%	0.156	$0.25		$7.05	—	—	3	37
Call · $35 Last $0.25 Breakeven $35.25 Implied vol 81% Delta 0.156 ≈16% ITM Gamma 0.043 Theta -0.031 Vega 0.014 Open interest 3k Model this call Put · $35 In the money Last $7.05 Breakeven $27.95 Implied vol — Delta — Gamma — Theta — Vega — Open interest 37 Model this put
11.1k	6	99.4%	0.092	$0.20		$11.42	—	—	2	0
Call · $40 Last $0.20 Breakeven $40.20 Implied vol 99.4% Delta 0.092 ≈9% ITM Gamma 0.024 Theta -0.026 Vega 0.015 Open interest 11.1k Model this call Put · $40 In the money Last $11.42 Breakeven $28.58 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
848	2	134.7%	0.106	$0.35		$12.81	—	—	2	0
Call · $45 Last $0.35 Breakeven $45.35 Implied vol 134.7% Delta 0.106 ≈11% ITM Gamma 0.019 Theta -0.038 Vega 0.016 Open interest 848 Model this call Put · $45 In the money Last $12.81 Breakeven $32.19 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
165	44	156.4%	0.095	$0.25		$17.40	—	—	2	0
Call · $50 Last $0.25 Breakeven $50.25 Implied vol 156.4% Delta 0.095 ≈10% ITM Gamma 0.016 Theta -0.041 Vega 0.009 Open interest 165 Model this call Put · $50 In the money Last $17.40 Breakeven $32.60 Implied vol — Delta — Gamma — Theta — Vega — 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 1434265 CUSIP 372303206 13F (30d) 92 filings 67 filers Visit website Investor relations