GMAB Option Chain
Every listed GMAB strike within 25% of spot, across the next 6 expirations — calls and puts side by side with last price, volume and open interest, plus the closing bid and ask.
Open interest and pricing as of the close on 2026-09-03. Recomputed every morning before the open.
903 contracts changed hands across these expirations — 778 calls against 125 puts. Calls outtraded puts 6.22 to one.
Sep 18, 202613 days
| Calls | Strike | Puts | ||||||
|---|---|---|---|---|---|---|---|---|
| Last | Vol | OI | Last | Vol | OI | |||
| — | — | 1,063 | 30 | — | — | 621 | ||
| 0.85 | 10 | 1,859 | 35 | 1.50 | 5 | 597 | ||
| — | — | 380 | 40 | — | — | — | ||
| A dash means the contract did not trade — not a price of zero. | ||||||||
Oct 16, 202641 days
| Calls | Strike | Puts | ||||||
|---|---|---|---|---|---|---|---|---|
| Last | Vol | OI | Last | Vol | OI | |||
| — | — | 11 | 30 | — | — | 775 | ||
| — | — | 836 | 35 | — | — | 161 | ||
| — | — | 36 | 40 | — | — | — | ||
| A dash means the contract did not trade — not a price of zero. | ||||||||
Nov 20, 202676 days
| Calls | Strike | Puts | ||||||
|---|---|---|---|---|---|---|---|---|
| Last | Vol | OI | Last | Vol | OI | |||
| — | — | 880 | 30 | — | — | 95 | ||
| — | — | 1,053 | 35 | — | — | 286 | ||
| — | — | 265 | 40 | — | — | — | ||
| A dash means the contract did not trade — not a price of zero. | ||||||||
Dec 18, 2026104 days
| Calls | Strike | Puts | ||||||
|---|---|---|---|---|---|---|---|---|
| Last | Vol | OI | Last | Vol | OI | |||
| — | — | 16,727 | 30 | 1.79 | 5 | 427 | ||
| — | — | 1,274 | 35 | — | — | 119 | ||
| 2.07 | 6 | 3,133 | 40 | — | — | 32 | ||
| A dash means the contract did not trade — not a price of zero. | ||||||||
Jan 15, 2027132 days
| Calls | Strike | Puts | ||||||
|---|---|---|---|---|---|---|---|---|
| Last | Vol | OI | Last | Vol | OI | |||
| — | — | 842 | 30 | 2.20 | 1 | 813 | ||
| 4.20 | 758 | 2,667 | 35 | 4.50 | 21 | 346 | ||
| 2.75 | 1 | 3,671 | 40 | — | — | 1 | ||
| A dash means the contract did not trade — not a price of zero. | ||||||||
Feb 19, 2027167 days
| Calls | Strike | Puts | ||||||
|---|---|---|---|---|---|---|---|---|
| Last | Vol | OI | Last | Vol | OI | |||
| — | — | 40 | 30 | 2.72 | 93 | 789 | ||
| 4.90 | 3 | 1,258 | 35 | — | — | 51 | ||
| — | — | 493 | 40 | — | — | 29 | ||
| A dash means the contract did not trade — not a price of zero. | ||||||||
How to read this chain
Calls sit on the left, puts on the right, and every row is one strike. The highlighted row is the strike closest to spot. Open interest is the number of contracts still outstanding at that strike — positions that exist right now. Volume is how many traded on the session shown. Open interest builds slowly and marks where positioning has accumulated; volume spikes and marks where attention went today.
Strikes with no open interest and no trades on either side are omitted, and the ladder is trimmed to within 25% of spot — the far wings are almost entirely empty and say nothing about positioning.
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Educational, not investment advice. Options involve risk. Open interest is reported with a one-session lag by OCC, so these levels describe positioning as of the last settled session, not live intraday flow.