GSK (GSK) Options Chain

NYSE: GSKHealth CareBiotechnology: Pharmaceutical PreparationsUSD

46.50-0.04 (-0.09%)

At close: Oct 9, 4:00 PM ET · Delayed 15 min

Expiration date

Expiration: Oct 16, 2026
Days to expiration: 7
Share price: $46.50
Put/call ratio (OI): 0.45
Put/call ratio (volume): 0.41
ATM implied volatility: 28.3%
Expected move: ±$1.82
Open interest (C / P): 3.16K / 1.43K

GSK options summary

The GSK options chain for the October 16, 2026 expiration lists 21 call and 17 put contracts, with 7 days until expiration. Open interest stands at 3,161 calls and 1,429 puts, a put/call ratio of 0.45, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $46.00 strike is 28.3%, which implies the market expects a move of about ±$1.82 (3.9%) in GSK stock by expiration.

The most open interest sits at the $52.00 call (898 contracts) and the $45.00 put (479 contracts).

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

GSK options chain · October 16, 2026

GSK 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
—	—	—	—	—	—	40.00	0.00	0.05	0.03	53.5%	4	10
6	6	68.3%	5.40	4.30	4.80	42.00	0.00	0.10	0.07	50.4%	1	1
1	1	69.2%	5.80	3.30	4.00	43.00	0.00	0.10	0.07	41.2%	2	10
81	10	51.2%	2.60	2.35	2.90	44.00	0.00	0.15	0.15	35.8%	1	96
1	—	43.2%	5.40	1.50	2.00	45.00	0.05	0.25	0.15	31.0%	42	479
300	3	30.3%	1.00	0.85	1.05	46.00	0.30	0.45	0.35	26.3%	2	64
GSK $46.50
31	3	28.0%	0.42	0.30	0.50	47.00	0.75	0.95	0.95	26.0%	15	114
52	57	28.7%	0.15	0.15	0.35	47.50	1.00	1.35	1.15	28.7%	31	85
95	139	30.0%	0.20	0.05	0.25	48.00	1.30	1.85	1.75	34.9%	3	221
124	110	29.3%	0.10	0.00	0.15	48.50	1.70	2.25	1.67	35.4%	2	37
254	2	34.0%	0.13	0.00	0.15	49.00	2.15	2.85	2.05	45.9%	2	81
11	1	34.3%	0.10	0.00	0.10	49.50	2.60	3.30	1.40	48.1%	2	51
395	1	38.3%	0.05	0.00	0.10	50.00	3.10	3.80	3.65	52.9%	5	180
62	4	45.9%	0.08	0.00	0.10	51.00	4.20	4.80	4.90	61.9%	28	0
898	2	55.7%	0.05	0.00	0.25	52.00	5.10	5.80	1.80	70.5%	—	0
297	3	52.3%	0.05	0.00	0.10	53.00	6.20	6.80	3.44	78.5%	—	0
45	1	77.5%	0.05	0.00	0.40	54.00	—	—	—	—	—	—
478	5	64.1%	0.05	0.00	0.10	55.00	7.70	9.20	5.30	120.9%	4	0
3	1	106.7%	0.10	0.00	0.75	56.00	—	—	—	—	—	—
12	—	113.9%	0.10	0.00	0.75	57.00	—	—	—	—	—	—
12	3	81.3%	0.08	0.00	0.05	60.00	—	—	—	—	—	—
3	3	157.8%	0.05	0.00	0.65	65.00	—	—	—	—	—	—

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 GSK put/call ratio?

For the October 16, 2026 expiration, the GSK put/call ratio based on open interest is 0.45 (1,429 puts vs 3,161 calls), and 0.41 based on today's volume. A ratio above 1 means more puts than calls.

What is GSK's implied volatility?

At-the-money implied volatility for GSK options expiring October 16, 2026 is about 28.3%, an annualized estimate of how much the market expects GSK stock to move.

How many GSK option expiration dates are there?

GSK has 10 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.