GSK · Option chain

GSK Option Chain

Every listed GSK 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.

Spot

$50.87

Call open interest

7,275

Put open interest

3,286

Put/call (volume)

1.32

383 contracts changed hands across these expirations — 165 calls against 218 puts. Puts outtraded calls 1.32 to one.

Sep 11, 20266 days

call OI 849 · put OI 182

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	5.00 / 7.10	—	—	45	—	0.00 / 0.10	—	20
—	4.10 / 6.10	—	—	46	—	0.00 / 1.75	—	8
—	3.20 / 4.90	—	—	47	—	0.00 / 1.75	—	36
—	2.70 / 4.40	—	—	47.5	0.05	0.00 / 0.25	1	13
—	2.25 / 4.00	—	10	48	—	0.00 / 0.20	—	40
—	1.85 / 3.60	—	—	48.5	—	0.00 / 0.20	—	8
—	1.40 / 3.00	—	4	49	—	0.00 / 0.25	—	5
—	1.50 / 1.90	—	—	49.5	0.20	0.15 / 0.35	1	3
1.30	1.15 / 2.20	2	5	50	0.35	0.20 / 0.35	3	7
0.64	0.00 / 0.85	1	384	51	0.85	0.05 / 0.85	5	12
0.30	0.20 / 0.30	5	183	52	1.40	1.25 / 1.50	54	26
0.10	0.05 / 0.20	14	57	53	2.27	1.15 / 2.40	17	—
0.09	0.00 / 0.65	3	11	54	—	2.00 / 3.90	—	1
—	0.00 / 0.15	—	27	55	—	3.10 / 5.40	—	—
—	0.00 / 0.95	—	166	56	—	3.90 / 5.90	—	1
—	0.00 / 1.75	—	2	57	—	4.90 / 6.90	—	1
—	0.00 / 1.75	—	—	62	—	9.80 / 12.40	—	1
A dash means the contract did not trade — not a price of zero.

Sep 18, 202613 days

call OI 5,211 · put OI 2,578

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	10.60 / 11.40	—	—	40	—	0.00 / 0.10	—	321
—	8.60 / 9.20	—	6	42	—	0.00 / 0.10	—	2
—	6.60 / 7.20	—	—	44	—	0.00 / 0.15	—	66
—	5.60 / 6.20	—	4	45	0.05	0.00 / 0.10	6	187
—	4.60 / 5.20	—	—	46	—	0.00 / 0.15	—	2
—	3.70 / 4.20	—	—	47	—	0.05 / 0.20	—	60
—	3.20 / 4.00	—	—	47.5	—	0.05 / 0.25	—	1
—	2.85 / 3.30	—	1	48	—	0.10 / 0.30	—	30
—	2.45 / 3.10	—	—	48.5	0.26	0.15 / 0.35	5	4
—	2.20 / 2.55	—	—	49	—	0.25 / 0.40	—	103
—	1.80 / 2.15	—	14	49.5	0.45	0.40 / 0.55	2	65
1.40	1.45 / 1.75	2	653	50	0.61	0.55 / 0.65	10	1,616
0.95	0.90 / 1.10	2	144	51	1.30	0.95 / 1.15	2	6
0.55	0.50 / 0.75	3	184	52	—	1.45 / 1.75	—	17
0.26	0.25 / 0.45	11	879	53	—	2.10 / 2.60	—	4
—	0.05 / 0.30	—	215	54	—	2.85 / 3.60	—	—
—	0.05 / 0.20	—	3,008	55	—	3.80 / 4.60	—	93
—	0.00 / 0.15	—	3	56	—	4.70 / 5.60	—	—
—	0.00 / 0.15	—	—	57	—	5.70 / 6.50	—	1
—	0.00 / 0.10	—	100	60	9.40	7.30 / 9.40	2	—
A dash means the contract did not trade — not a price of zero.

Sep 25, 202620 days

call OI 360 · put OI 142

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	10.10 / 12.70	—	—	40	—	0.00 / 0.95	—	2
—	6.20 / 8.40	—	—	44	—	0.00 / 1.95	—	19
—	4.80 / 7.10	—	—	45	—	0.00 / 1.45	—	5
—	4.20 / 6.20	—	—	46	—	0.00 / 0.55	—	20
—	3.30 / 5.10	—	—	47	—	0.10 / 0.95	—	9
3.83	2.40 / 4.20	2	2	48	—	0.05 / 0.45	—	14
—	2.10 / 3.80	—	—	49	0.65	0.25 / 0.70	100	56
—	1.65 / 2.60	—	10	50	0.95	0.65 / 0.95	1	7
—	0.40 / 2.10	—	37	51	—	1.00 / 1.45	—	4
1.07	0.30 / 0.90	2	3	52	1.98	1.55 / 2.00	2	1
—	0.35 / 0.80	—	5	53	—	2.00 / 2.90	—	5
—	0.05 / 0.65	—	45	54	—	2.60 / 4.10	—	—
—	0.05 / 0.40	—	61	55	—	3.50 / 4.80	—	—
—	0.10 / 0.75	—	68	56	—	4.20 / 6.00	—	—
—	0.00 / 0.95	—	102	57	—	5.10 / 7.00	—	—
—	0.00 / 0.75	—	24	58	—	5.70 / 9.20	—	—
—	0.00 / 1.50	—	3	59	—	6.30 / 10.20	—	—
A dash means the contract did not trade — not a price of zero.

Oct 02, 202627 days

call OI 197 · put OI 135

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	6.30 / 9.90	—	—	43	—	0.00 / 0.75	—	1
—	5.10 / 7.30	—	—	45	—	0.00 / 0.30	—	71
—	4.10 / 6.30	—	—	46	—	0.00 / 0.40	—	2
—	3.30 / 5.30	—	—	47	—	0.00 / 0.45	—	3
—	2.50 / 4.50	—	—	48	—	0.15 / 0.60	—	10
—	2.30 / 3.50	—	—	49	—	0.00 / 0.85	—	13
—	1.55 / 2.30	—	7	50	—	0.00 / 1.75	—	23
1.20	0.65 / 2.10	42	44	51	—	0.95 / 1.60	—	10
—	0.35 / 1.20	—	4	52	—	1.70 / 2.20	—	1
0.62	0.50 / 1.70	6	42	53	—	2.20 / 3.70	—	—
—	0.15 / 0.65	—	7	54	—	3.00 / 4.30	—	—
0.30	0.00 / 0.50	3	23	55	4.30	3.20 / 4.70	3	1
—	0.00 / 0.60	—	15	56	—	4.50 / 5.90	—	—
—	0.00 / 0.70	—	5	57	—	4.80 / 7.40	—	—
—	0.00 / 0.55	—	21	58	—	5.30 / 9.10	—	—
—	0.05 / 0.30	—	29	59	—	6.30 / 9.50	—	—
A dash means the contract did not trade — not a price of zero.

Oct 09, 202634 days

call OI 14 · put OI 4

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	5.10 / 7.40	—	—	45	—	0.00 / 0.75	—	2
—	3.50 / 5.50	—	—	47	0.42	0.10 / 0.55	1	1
—	1.20 / 3.00	—	—	50	—	0.40 / 1.75	—	1
—	0.80 / 1.40	—	1	52	—	1.70 / 2.55	—	—
—	0.15 / 0.75	—	12	55	—	3.40 / 5.50	—	—
—	0.00 / 1.50	—	1	57	—	5.00 / 7.10	—	—
A dash means the contract did not trade — not a price of zero.

Oct 16, 202641 days

call OI 644 · put OI 245

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	10.70 / 11.40	—	—	40	—	0.00 / 0.15	—	10
—	5.90 / 6.50	—	—	45	—	0.15 / 0.30	—	30
—	2.25 / 2.50	—	277	50	1.25	1.10 / 1.30	3	198
0.45	0.40 / 0.50	66	353	55	—	4.20 / 4.70	—	7
0.10	0.00 / 0.15	1	14	60	—	8.70 / 9.50	—	—
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.

More on GSK

GSK options score GSK gamma walls GSK max pain GSK IV rank GSK put/call ratio GSK options flow

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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.