Glaukos (GKOS) Options Chain

NYSE: GKOSHealthcareMedical DevicesUSD

161.29-10.89 (-6.32%)

At close: Oct 8, 4:00 PM ET · Delayed 15 min

Expiration date

Expiration: Oct 16, 2026
Days to expiration: 8
Share price: $161.29
Put/call ratio (OI): 1.70
Put/call ratio (volume): 5.39
ATM implied volatility: 53.6%
Expected move: ±$12.80
Open interest (C / P): 3.15K / 5.37K

GKOS options summary

The GKOS options chain for the October 16, 2026 expiration lists 28 call and 27 put contracts, with 8 days until expiration. Open interest stands at 3,149 calls and 5,369 puts, a put/call ratio of 1.70, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $160.00 strike is 53.6%, which implies the market expects a move of about ±$12.80 (7.9%) in Glaukos stock by expiration.

The most open interest sits at the $160.00 call (1.17K contracts) and the $140.00 put (1.27K contracts).

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

GKOS options chain · October 16, 2026

GKOS 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
—	—	—	—	—	—	60.00	0.00	2.50	1.85	409.9%	—	1
—	—	—	—	—	—	65.00	0.00	2.80	2.55	389.1%	—	1
—	—	—	—	—	—	80.00	0.00	2.15	0.67	292.6%	—	5
0	1	—	31.55	0.00	0.00	85.00	0.75	3.80	4.00	322.3%	—	1
0	1	—	29.60	0.00	0.00	90.00	3.50	6.00	5.30	370.4%	1	1
—	—	—	—	—	—	95.00	0.00	2.15	1.38	229.9%	4	6
2	2	692.2%	56.55	84.70	88.70	100.00	0.00	2.15	2.20	211.0%	—	5
3	1	511.1%	77.80	71.40	74.90	105.00	0.05	3.80	9.00	222.7%	1	1
0	—	—	15.40	0.00	0.00	110.00	0.00	2.40	1.10	180.2%	1	124
0	1	—	23.20	0.00	0.00	115.00	0.00	2.20	0.95	159.8%	2	121
0	2	—	12.57	0.00	0.00	120.00	0.00	2.35	0.31	145.9%	1	4
7	1	509.8%	25.35	61.20	63.80	125.00	0.00	2.40	0.25	130.7%	4	9
0	1	—	60.12	0.00	0.00	130.00	0.00	1.35	0.25	99.4%	3	34
19	2	72.0%	15.90	25.20	28.00	135.00	0.00	2.50	0.50	100.7%	8	146
113	1	69.9%	11.80	20.30	23.50	140.00	0.00	1.90	0.50	78.7%	5	1,275
1	2	65.3%	13.65	15.90	18.70	145.00	0.20	2.30	3.20	70.0%	496	553
29	23	63.7%	12.00	11.70	14.60	150.00	0.60	3.80	3.56	68.6%	59	491
185	1	57.0%	14.00	7.60	10.50	155.00	1.30	4.30	4.70	57.5%	145	530
1,167	7	56.7%	6.50	4.60	7.50	160.00	2.85	5.50	13.10	50.5%	245	934
GKOS $161.29
172	4	54.5%	2.00	2.30	4.90	165.00	5.30	8.40	17.00	66.2%	4	411
19	7	62.3%	0.70	1.40	4.00	170.00	9.40	12.20	3.20	54.8%	28	182
108	5	55.7%	0.40	0.00	2.35	175.00	13.60	16.30	16.40	56.7%	2	404
1,089	58	69.8%	0.35	0.05	2.55	180.00	17.60	20.90	30.00	54.3%	2	79
42	18	80.5%	0.20	0.00	2.55	185.00	22.40	25.90	22.86	61.1%	2	48
67	13	86.7%	0.10	0.00	2.15	190.00	27.10	30.80	14.10	62.1%	—	1
16	6	100.2%	0.85	0.00	2.50	195.00	31.90	35.90	17.80	67.2%	—	2
39	3	109.5%	0.55	0.00	2.50	200.00	0.00	0.00	88.80	—	—	0
62	26	126.3%	2.45	0.00	2.45	210.00	—	—	—	—	—	—
0	—	50.0%	3.00	0.00	0.00	220.00	—	—	—	—	—	—
0	1	50.0%	2.05	0.00	0.00	230.00	—	—	—	—	—	—
9	1	170.7%	0.80	0.00	2.45	240.00	—	—	—	—	—	—
0	—	50.0%	0.85	0.00	0.00	250.00	—	—	—	—	—	—

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 GKOS put/call ratio?

For the October 16, 2026 expiration, the GKOS put/call ratio based on open interest is 1.70 (5,369 puts vs 3,149 calls), and 5.39 based on today's volume. A ratio above 1 means more puts than calls.

What is GKOS's implied volatility?

At-the-money implied volatility for GKOS options expiring October 16, 2026 is about 53.6%, an annualized estimate of how much the market expects Glaukos stock to move.

How many GKOS option expiration dates are there?

GKOS has 6 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.