Waters (WAT) Options Chain

NYSE: WATIndustrialsBiotechnology: Laboratory Analytical InstrumentsUSD

433.77+4.64 (+1.08%)

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

Expiration date

Expiration: Oct 16, 2026
Days to expiration: 7
Share price: $433.77
Put/call ratio (OI): 0.20
Put/call ratio (volume): 0.63
ATM implied volatility: 43.6%
Expected move: ±$26.16
Open interest (C / P): 323 / 64

WAT options summary

The WAT options chain for the October 16, 2026 expiration lists 11 call and 12 put contracts, with 7 days until expiration. Open interest stands at 323 calls and 64 puts, a put/call ratio of 0.20, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $430.00 strike is 43.6%, which implies the market expects a move of about ±$26.16 (6.0%) in Waters stock by expiration.

The most open interest sits at the $440.00 call (192 contracts) and the $380.00 put (25 contracts).

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

WAT options chain · October 16, 2026

WAT 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
—	—	—	—	—	—	260.00	0.00	4.90	0.75	230.5%	—	1
—	—	—	—	—	—	300.00	0.00	4.90	1.75	175.4%	1	2
—	—	—	—	—	—	350.00	0.00	1.70	0.23	90.2%	1	1
—	—	—	—	—	—	360.00	0.00	1.50	0.27	78.4%	2	3
21	20	92.4%	66.63	60.80	66.40	370.00	0.00	0.25	0.48	51.4%	2	4
30	—	80.7%	48.18	51.20	56.40	380.00	0.00	1.70	0.70	60.8%	2	25
30	—	70.6%	38.78	39.40	46.60	390.00	0.00	2.30	0.55	54.9%	1	2
1	2	60.8%	25.00	29.70	36.90	400.00	0.00	1.95	4.28	52.0%	1	1
2	2	50.0%	19.23	22.30	27.20	410.00	0.00	4.90	3.50	58.4%	1	7
1	—	47.5%	10.00	12.50	19.40	420.00	1.70	3.90	2.70	39.0%	2	9
7	1	44.5%	17.00	7.40	12.60	430.00	3.30	8.40	5.98	42.6%	7	9
WAT $433.77
192	1	38.5%	6.50	1.75	6.50	440.00	—	—	—	—	—	—
5	2	53.0%	3.00	0.05	6.40	450.00	—	—	—	—	—	—
29	3	44.8%	2.15	0.00	2.55	460.00	—	—	—	—	—	—
5	1	49.9%	2.95	0.00	1.90	470.00	—	—	—	—	—	—
—	—	—	—	—	—	490.00	53.80	60.80	52.00	58.4%	—	0

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 WAT put/call ratio?

For the October 16, 2026 expiration, the WAT put/call ratio based on open interest is 0.20 (64 puts vs 323 calls), and 0.63 based on today's volume. A ratio above 1 means more puts than calls.

What is WAT's implied volatility?

At-the-money implied volatility for WAT options expiring October 16, 2026 is about 43.6%, an annualized estimate of how much the market expects Waters stock to move.

How many WAT option expiration dates are there?

WAT has 5 listed expiration dates, from Oct 16, 2026 to May 21, 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.