GSK · GSK plc

Track GSK — free Ask ALVIS about GSK

$52.08 -1.15 (-2.15%)

Market Cap

$104.29B

2.00B

Options Chain

15-min delayed Underlying $52.08 · today Options Calculator

Positioning

Jul 31, 2026 · 1 days to expiry · 74 contracts

Put / call OI

1.34

Put-heavy positioning

Open interest

2,835

contracts outstanding

Volume

322

traded today

Max pain

$53.00

$0.93 above spot

ATM implied vol

36.9%

market's expected move

Open interest by strike · near the money

Calls Puts

43.5

44.5

45.5

46.5

47.5

48.5

49.5

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Jul 31 1d Aug 7 8d Aug 14 15d Aug 21 22d Aug 28 29d Sep 4 36d Sep 11 43d Sep 18 50d Nov 20 113d Jan 15 169d Feb 19 204d Jan 21 540d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
2	1	675%	0.957	$23.75		$0.20	—	—	10	12
Call · $30 In the money Last $23.75 Breakeven $53.75 Implied vol 675% Delta 0.957 ≈96% ITM Gamma 0.005 Theta -0.823 Vega 0.002 Open interest 2 Model this call Put · $30 Last $0.20 Breakeven $29.80 Implied vol — Delta — Gamma — Theta — Vega — Open interest 12 Model this put
2	6	478.8%	0.954	$18.00		$0.20	—	—	6	13
Call · $35 In the money Last $18.00 Breakeven $53.00 Implied vol 478.8% Delta 0.954 ≈95% ITM Gamma 0.007 Theta -0.614 Vega 0.002 Open interest 2 Model this call Put · $35 Last $0.20 Breakeven $34.80 Implied vol — Delta — Gamma — Theta — Vega — Open interest 13 Model this put
1	1	—	—	$13.25		$0.10	—	—	1	3
Call · $39 In the money Last $13.25 Breakeven $52.25 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this call Put · $39 Last $0.10 Breakeven $38.90 Implied vol — Delta — Gamma — Theta — Vega — Open interest 3 Model this put
2	2	—	—	$12.34		—	—	—	—	0
Call · $40 In the money Last $12.34 Breakeven $52.34 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 Model this call Put · $40 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	1	287%	0.95	$11.40		—	—	—	—	0
Call · $41 In the money Last $11.40 Breakeven $52.40 Implied vol 287% Delta 0.95 ≈95% ITM Gamma 0.013 Theta -0.396 Vega 0.003 Open interest 1 Model this call Put · $41 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
2	1	279.8%	0.937	$10.08		—	-0.092	323.7%	—	0
Call · $42 In the money Last $10.08 Breakeven $52.08 Implied vol 279.8% Delta 0.937 ≈94% ITM Gamma 0.016 Theta -0.467 Vega 0.004 Open interest 2 Model this call Put · $42 Last — Breakeven — Implied vol 323.7% Delta -0.092 ≈9% ITM Gamma 0.018 Theta -0.716 Vega 0.004 Open interest 0 Model this put
2	2	242.3%	0.941	$9.35		—	-0.1	297.6%	—	0
Call · $43 In the money Last $9.35 Breakeven $52.35 Implied vol 242.3% Delta 0.941 ≈94% ITM Gamma 0.018 Theta -0.384 Vega 0.003 Open interest 2 Model this call Put · $43 Last — Breakeven — Implied vol 297.6% Delta -0.1 ≈10% ITM Gamma 0.021 Theta -0.699 Vega 0.004 Open interest 0 Model this put
3	1	241.7%	0.928	$8.95		—	—	—	—	0
Call · $43.5 In the money Last $8.95 Breakeven $52.45 Implied vol 241.7% Delta 0.928 ≈93% ITM Gamma 0.02 Theta -0.442 Vega 0.004 Open interest 3 Model this call Put · $43.5 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
2	2	218.3%	0.936	$8.21		—	-0.178	384%	—	0
Call · $44 In the money Last $8.21 Breakeven $52.21 Implied vol 218.3% Delta 0.936 ≈94% ITM Gamma 0.021 Theta -0.369 Vega 0.005 Open interest 2 Model this call Put · $44 Last — Breakeven — Implied vol 384% Delta -0.178 ≈18% ITM Gamma 0.025 Theta -1.347 Vega 0.007 Open interest 0 Model this put
2	1	217.1%	0.921	$7.80		$0.32	-0.072	210.2%	1	1
Call · $44.5 In the money Last $7.80 Breakeven $52.30 Implied vol 217.1% Delta 0.921 ≈92% ITM Gamma 0.024 Theta -0.425 Vega 0.005 Open interest 2 Model this call Put · $44.5 Last $0.32 Breakeven $44.18 Implied vol 210.2% Delta -0.072 ≈7% ITM Gamma 0.024 Theta -0.386 Vega 0.005 Open interest 1 Model this put
2	4	162%	0.958	$7.13		$0.06	-0.056	178.5%	55	77
Call · $45 In the money Last $7.13 Breakeven $52.13 Implied vol 162% Delta 0.958 ≈96% ITM Gamma 0.02 Theta -0.191 Vega 0.003 Open interest 2 Model this call Put · $45 Last $0.06 Breakeven $44.94 Implied vol 178.5% Delta -0.056 ≈6% ITM Gamma 0.023 Theta -0.271 Vega 0.003 Open interest 77 Model this put
0	—	—	—	—		$0.05	-0.12	229.6%	1	2
Call · $45.5 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $45.5 Last $0.05 Breakeven $45.45 Implied vol 229.6% Delta -0.12 ≈12% ITM Gamma 0.032 Theta -0.624 Vega 0.007 Open interest 2 Model this put
1	9	119.8%	0.976	$6.05		$0.15	-0.13	218.9%	1	2
Call · $46 In the money Last $6.05 Breakeven $52.05 Implied vol 119.8% Delta 0.976 ≈98% ITM Gamma 0.017 Theta -0.088 Vega 0.001 Open interest 1 Model this call Put · $46 Last $0.15 Breakeven $45.85 Implied vol 218.9% Delta -0.13 ≈13% ITM Gamma 0.035 Theta -0.626 Vega 0.007 Open interest 2 Model this put
2	7	—	—	$5.65		$0.10	-0.083	157.3%	23	23
Call · $46.5 In the money Last $5.65 Breakeven $52.15 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 Model this call Put · $46.5 Last $0.10 Breakeven $46.40 Implied vol 157.3% Delta -0.083 ≈8% ITM Gamma 0.035 Theta -0.32 Vega 0.005 Open interest 23 Model this put
3	1	—	—	$5.23		$0.20	-0.229	289.3%	2	3
Call · $47 In the money Last $5.23 Breakeven $52.23 Implied vol — Delta — Gamma — Theta — Vega — Open interest 3 Model this call Put · $47 Last $0.20 Breakeven $46.80 Implied vol 289.3% Delta -0.229 ≈23% ITM Gamma 0.038 Theta -1.181 Vega 0.009 Open interest 3 Model this put
2	2	94%	0.97	$5.82		$0.04	-0.086	129.1%	5	33
Call · $47.5 In the money Last $5.82 Breakeven $53.32 Implied vol 94% Delta 0.97 ≈97% ITM Gamma 0.026 Theta -0.084 Vega 0.003 Open interest 2 Model this call Put · $47.5 Last $0.04 Breakeven $47.46 Implied vol 129.1% Delta -0.086 ≈9% ITM Gamma 0.044 Theta -0.271 Vega 0.005 Open interest 33 Model this put
5	4	157.3%	0.843	$5.27		$0.40	-0.118	133.7%	9	75
Call · $48 In the money Last $5.27 Breakeven $53.27 Implied vol 157.3% Delta 0.843 ≈84% ITM Gamma 0.055 Theta -0.504 Vega 0.007 Open interest 5 Model this call Put · $48 Last $0.40 Breakeven $47.60 Implied vol 133.7% Delta -0.118 ≈12% ITM Gamma 0.054 Theta -0.358 Vega 0.005 Open interest 75 Model this put
0	—	143.8%	0.831	—		$0.30	-0.149	132.4%	2	27
Call · $48.5 In the money Last — Breakeven — Implied vol 143.8% Delta 0.831 ≈83% ITM Gamma 0.063 Theta -0.483 Vega 0.007 Open interest 0 Model this call Put · $48.5 Last $0.30 Breakeven $48.20 Implied vol 132.4% Delta -0.149 ≈15% ITM Gamma 0.063 Theta -0.413 Vega 0.007 Open interest 27 Model this put
5	1	109.5%	0.858	$3.32		$0.02	-0.176	126.1%	1	11
Call · $49 In the money Last $3.32 Breakeven $52.32 Implied vol 109.5% Delta 0.858 ≈86% ITM Gamma 0.074 Theta -0.33 Vega 0.007 Open interest 5 Model this call Put · $49 Last $0.02 Breakeven $48.98 Implied vol 126.1% Delta -0.176 ≈18% ITM Gamma 0.074 Theta -0.436 Vega 0.007 Open interest 11 Model this put
1	1	96.4%	0.843	$2.77		$0.02	-0.225	132.7%	1	16
Call · $49.5 In the money Last $2.77 Breakeven $52.27 Implied vol 96.4% Delta 0.843 ≈84% ITM Gamma 0.09 Theta -0.309 Vega 0.007 Open interest 1 Model this call Put · $49.5 Last $0.02 Breakeven $49.48 Implied vol 132.7% Delta -0.225 ≈23% ITM Gamma 0.083 Theta -0.54 Vega 0.009 Open interest 16 Model this put
3	1	83.5%	0.823	$2.42		$0.05	-0.214	99.9%	7	113
Call · $50 In the money Last $2.42 Breakeven $52.42 Implied vol 83.5% Delta 0.823 ≈82% ITM Gamma 0.112 Theta -0.289 Vega 0.007 Open interest 3 Model this call Put · $50 Last $0.05 Breakeven $49.95 Implied vol 99.9% Delta -0.214 ≈21% ITM Gamma 0.107 Theta -0.395 Vega 0.007 Open interest 113 Model this put
57	5	64.6%	0.731	$1.47		$0.13	-0.201	46.9%	2	75
Call · $51 In the money Last $1.47 Breakeven $52.47 Implied vol 64.6% Delta 0.731 ≈73% ITM Gamma 0.184 Theta -0.285 Vega 0.01 Open interest 57 Model this call Put · $51 Last $0.13 Breakeven $50.87 Implied vol 46.9% Delta -0.201 ≈20% ITM Gamma 0.217 Theta -0.177 Vega 0.007 Open interest 75 Model this put
62	9	41.7%	0.528	$0.45		$0.40	-0.466	32.1%	1	43
Call · $52 In the money Last $0.45 Breakeven $52.45 Implied vol 41.7% Delta 0.528 ≈53% ITM Gamma 0.347 Theta -0.224 Vega 0.011 Open interest 62 Model this call Put · $52 Last $0.40 Breakeven $51.60 Implied vol 32.1% Delta -0.466 ≈47% ITM Gamma 0.45 Theta -0.172 Vega 0.011 Open interest 43 Model this put
Underlying $52.08
468	2	42.7%	0.221	$0.10		$0.70	-0.651	81.1%	20	1.1k
Call · $53 Last $0.10 Breakeven $53.10 Implied vol 42.7% Delta 0.221 ≈22% ITM Gamma 0.253 Theta -0.171 Vega 0.007 Open interest 468 Model this call Put · $53 In the money Last $0.70 Breakeven $52.30 Implied vol 81.1% Delta -0.651 ≈65% ITM Gamma 0.166 Theta -0.407 Vega 0.01 Open interest 1.1k Model this put
60	3	58.5%	0.124	$0.04		$0.60	—	—	3	4
Call · $54 Last $0.04 Breakeven $54.04 Implied vol 58.5% Delta 0.124 ≈12% ITM Gamma 0.127 Theta -0.161 Vega 0.005 Open interest 60 Model this call Put · $54 In the money Last $0.60 Breakeven $53.40 Implied vol — Delta — Gamma — Theta — Vega — Open interest 4 Model this put
242	16	96%	0.147	$0.06		$2.67	—	—	1	6
Call · $55 Last $0.06 Breakeven $55.06 Implied vol 96% Delta 0.147 ≈15% ITM Gamma 0.087 Theta -0.298 Vega 0.008 Open interest 242 Model this call Put · $55 In the money Last $2.67 Breakeven $52.33 Implied vol — Delta — Gamma — Theta — Vega — Open interest 6 Model this put
27	16	148.1%	0.191	$0.10		—	—	—	—	0
Call · $56 Last $0.10 Breakeven $56.10 Implied vol 148.1% Delta 0.191 ≈19% ITM Gamma 0.066 Theta -0.538 Vega 0.008 Open interest 27 Model this call Put · $56 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
172	9	120%	0.083	$0.05		—	—	—	—	0
Call · $57 Last $0.05 Breakeven $57.05 Implied vol 120% Delta 0.083 ≈8% ITM Gamma 0.046 Theta -0.245 Vega 0.005 Open interest 172 Model this call Put · $57 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
15	5	130.3%	0.064	$0.03		—	—	—	—	0
Call · $58 Last $0.03 Breakeven $58.03 Implied vol 130.3% Delta 0.064 ≈6% ITM Gamma 0.035 Theta -0.219 Vega 0.003 Open interest 15 Model this call Put · $58 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
29	26	137.2%	0.047	$0.05		$6.90	-0.982	110.5%	2	0
Call · $59 Last $0.05 Breakeven $59.05 Implied vol 137.2% Delta 0.047 ≈5% ITM Gamma 0.026 Theta -0.18 Vega 0.003 Open interest 29 Model this call Put · $59 In the money Last $6.90 Breakeven $52.10 Implied vol 110.5% Delta -0.982 ≈98% ITM Gamma 0.014 Theta -0.064 Vega 0.002 Open interest 0 Model this put
37	20	192.6%	0.092	$0.05		$7.90	-0.984	123.5%	4	0
Call · $60 Last $0.05 Breakeven $60.05 Implied vol 192.6% Delta 0.092 ≈9% ITM Gamma 0.031 Theta -0.424 Vega 0.005 Open interest 37 Model this call Put · $60 In the money Last $7.90 Breakeven $52.10 Implied vol 123.5% Delta -0.984 ≈98% ITM Gamma 0.012 Theta -0.066 Vega 0.002 Open interest 0 Model this put
1	1	247.3%	0.129	$0.05		—	-0.915	208.8%	—	0
Call · $61 Last $0.05 Breakeven $61.05 Implied vol 247.3% Delta 0.129 ≈13% ITM Gamma 0.031 Theta -0.697 Vega 0.005 Open interest 1 Model this call Put · $61 In the money Last — Breakeven — Implied vol 208.8% Delta -0.915 ≈92% ITM Gamma 0.027 Theta -0.435 Vega 0.005 Open interest 0 Model this put
0	—	263.9%	0.122	—		—	-0.908	235%	—	0
Call · $62 Last — Breakeven — Implied vol 263.9% Delta 0.122 ≈12% ITM Gamma 0.028 Theta -0.714 Vega 0.005 Open interest 0 Model this call Put · $62 In the money Last — Breakeven — Implied vol 235% Delta -0.908 ≈91% ITM Gamma 0.025 Theta -0.516 Vega 0.005 Open interest 0 Model this put
0	—	280.2%	0.116	—		—	-0.868	297.8%	—	0
Call · $63 Last — Breakeven — Implied vol 280.2% Delta 0.116 ≈12% ITM Gamma 0.025 Theta -0.731 Vega 0.005 Open interest 0 Model this call Put · $63 In the money Last — Breakeven — Implied vol 297.8% Delta -0.868 ≈87% ITM Gamma 0.026 Theta -0.852 Vega 0.005 Open interest 0 Model this put
0	—	—	—	—		—	-0.928	255.4%	—	0
Call · $64 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $64 In the money Last — Breakeven — Implied vol 255.4% Delta -0.928 ≈93% ITM Gamma 0.02 Theta -0.473 Vega 0.003 Open interest 0 Model this put
0	—	—	—	—		$14.50	-0.931	268.9%	4	0
Call · $65 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $65 In the money Last $14.50 Breakeven $50.50 Implied vol 268.9% Delta -0.931 ≈93% ITM Gamma 0.018 Theta -0.48 Vega 0.003 Open interest 0 Model this put
0	—	304.3%	0.038	—		—	-0.925	363.6%	—	0
Call · $70 Last — Breakeven — Implied vol 304.3% Delta 0.038 ≈4% ITM Gamma 0.01 Theta -0.34 Vega 0.003 Open interest 0 Model this call Put · $70 In the money Last — Breakeven — Implied vol 363.6% Delta -0.925 ≈92% ITM Gamma 0.014 Theta -0.692 Vega 0.003 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. The 25 strikes around the money are shown by default — switch to "All 37" for the wings. Max pain is the listed strike where the most open interest would expire worthless — a positioning reference, not a forecast.

Key facts CIK 1131399 CUSIP 37733W204 13F (30d) 431 filings 396 filers Visit website