Glaukos (GKOS) Options Chain

NYSE: GKOSHealth CareMedical/Dental InstrumentsUSD

165.69+4.40 (+2.73%)

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

Expiration date

Expiration: Dec 18, 2026
Days to expiration: 68
Share price: $165.69
Put/call ratio (OI): 0.73
Put/call ratio (volume): 0.51
ATM implied volatility: 60.0%
Expected move: ±$42.88
Open interest (C / P): 966 / 707

GKOS options summary

The GKOS options chain for the December 18, 2026 expiration lists 30 call and 23 put contracts, with 68 days until expiration. Open interest stands at 966 calls and 707 puts, a put/call ratio of 0.73, which is fairly balanced between calls and puts. At-the-money implied volatility near the $165.00 strike is 60.0%, which implies the market expects a move of about ±$42.88 (25.9%) in Glaukos stock by expiration.

The most open interest sits at the $200.00 call (607 contracts) and the $150.00 put (601 contracts).

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

GKOS options chain · December 18, 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
0	2	—	57.50	0.00	0.00	60.00	0.00	3.30	0.80	150.9%	—	1
—	—	—	—	—	—	65.00	0.00	0.00	2.00	50.0%	1	0
0	1	—	47.65	47.50	51.50	75.00	0.00	2.30	1.75	111.9%	1	4
—	—	—	—	—	—	80.00	0.00	0.55	0.26	80.7%	5	24
0	1	263.7%	76.66	100.30	104.40	85.00	0.00	2.40	1.80	97.1%	1	2
5	—	—	38.29	20.80	24.60	90.00	6.20	10.50	10.00	158.4%	—	10
5	5	234.8%	62.84	91.00	94.50	95.00	0.75	4.50	7.20	100.8%	1	3
0	2	—	23.88	0.00	0.00	100.00	0.00	0.00	0.78	25.0%	1	0
—	—	—	—	—	—	105.00	0.00	3.10	1.40	74.8%	1	9
—	—	—	—	—	—	110.00	0.00	0.00	0.80	25.0%	1	0
0	5	—	73.45	0.00	0.00	115.00	0.35	3.80	2.00	67.7%	1	16
0	5	—	14.71	0.00	0.00	120.00	1.00	4.10	3.10	65.4%	1	5
0	1	—	14.10	0.00	0.00	125.00	1.85	4.70	5.30	64.3%	4	11
2	1	65.5%	37.85	38.50	42.00	130.00	2.95	4.90	4.50	61.8%	1	7
69	1	64.3%	37.10	34.60	38.00	135.00	3.60	6.20	5.10	60.6%	1	2
14	1	62.2%	25.61	30.90	33.80	140.00	—	—	—	—	—	—
1	—	—	14.90	16.40	18.50	145.00	—	—	—	—	—	—
8	1	61.2%	22.80	24.20	27.20	150.00	8.10	11.20	9.66	59.8%	1	601
9	1	61.6%	28.00	21.40	24.50	155.00	—	—	—	—	—	—
21	6	60.4%	16.90	18.80	21.20	160.00	12.50	15.10	10.00	58.5%	3	4
1	1	60.9%	13.20	16.10	19.40	165.00	15.00	18.10	19.35	59.1%	—	3
GKOS $165.69
99	2	59.0%	15.10	13.60	16.50	170.00	17.60	20.60	18.20	58.1%	3	1
14	2	58.2%	11.80	11.40	14.40	175.00	16.00	18.90	24.00	46.6%	—	1
36	2	57.3%	9.80	9.30	12.50	180.00	23.40	26.30	19.02	56.0%	1	2
9	3	56.8%	6.25	7.70	10.80	185.00	0.00	0.00	21.10	—	—	0
8	1	56.7%	7.90	6.30	9.50	190.00	—	—	—	—	—	—
3	—	56.0%	15.60	5.00	8.10	195.00	—	—	—	—	—	—
607	1	56.0%	5.80	4.00	7.10	200.00	30.60	34.00	40.10	—	—	1
1	2	57.2%	4.70	2.60	5.80	210.00	—	—	—	—	—	—
7	5	57.8%	6.00	1.60	4.60	220.00	—	—	—	—	—	—
3	1	59.9%	1.35	0.00	3.60	240.00	—	—	—	—	—	—
6	1	63.3%	1.10	0.10	3.20	250.00	—	—	—	—	—	—
0	—	25.0%	2.90	0.00	0.00	270.00	—	—	—	—	—	—
38	1	71.2%	0.90	0.00	2.45	280.00	—	—	—	—	—	—

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 December 18, 2026 expiration, the GKOS put/call ratio based on open interest is 0.73 (707 puts vs 966 calls), and 0.51 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 December 18, 2026 is about 60.0%, 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.