West Pharmaceutical Services (WST) Options Chain

NYSE: WSTHealth CareMedical/Dental InstrumentsUSD

366.00+2.73 (+0.75%)

At close: Oct 9, 4:02 PM ET · Delayed 15 min

Expiration date

Expiration: May 21, 2027
Days to expiration: 223
Share price: $366.00
Put/call ratio (OI): 0.57
Open interest (C / P): 7 / 4

WST options summary

The WST options chain for the May 21, 2027 expiration lists 2 call and 2 put contracts, with 223 days until expiration. Open interest stands at 7 calls and 4 puts, a put/call ratio of 0.57, which is tilted bullish, with calls outnumbering puts. The most open interest sits at the $500.00 call (7 contracts) and the $300.00 put (3 contracts).

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

WST options chain · May 21, 2027

WST 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
—	—	—	—	—	—	210.00	0.65	2.95	1.55	47.2%	1	1
—	—	—	—	—	—	300.00	11.60	15.00	13.50	38.3%	—	3
—	—	—	55.10	—	—	360.00	—	—	—	—	—	—
WST $366.00
7	—	39.0%	10.48	7.40	10.40	500.00	—	—	—	—	—	—

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 WST put/call ratio?

For the May 21, 2027 expiration, the WST put/call ratio based on open interest is 0.57 (4 puts vs 7 calls). A ratio above 1 means more puts than calls.

How many WST option expiration dates are there?

WST has 7 listed expiration dates, from Oct 16, 2026 to Dec 17, 2027.

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.