Illumina (ILMN) Options Chain

NASDAQ: ILMNHealth CareMedical SpecialitiesUSD

264.57-3.19 (-1.19%)

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

After hours: 264.57 0.00%

Expiration date

Expiration: Oct 16, 2026
Days to expiration: 8
Share price: $264.57
Put/call ratio (OI): 1.30
Put/call ratio (volume): 0.20
ATM implied volatility: 54.9%
Expected move: ±$21.50
Open interest (C / P): 2.98K / 3.88K

ILMN options summary

The ILMN options chain for the October 16, 2026 expiration lists 25 call and 22 put contracts, with 8 days until expiration. Open interest stands at 2,982 calls and 3,882 puts, a put/call ratio of 1.30, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $260.00 strike is 54.9%, which implies the market expects a move of about ±$21.50 (8.1%) in Illumina stock by expiration.

The most open interest sits at the $300.00 call (620 contracts) and the $230.00 put (781 contracts).

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

ILMN options chain · October 16, 2026

ILMN 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
16	1	243.7%	127.40	127.70	130.70	135.00	—	—	—	—	—	—
5	1	223.9%	125.70	122.70	125.50	140.00	0.00	2.15	0.28	229.9%	1	1
0	1	217.0%	117.30	117.70	120.60	145.00	—	—	—	—	—	—
3	1	206.3%	124.57	112.70	115.60	150.00	0.00	1.55	0.25	195.9%	—	3
4	2	209.1%	111.50	107.90	111.00	155.00	0.00	2.15	0.18	197.6%	3	4
7	3	204.1%	105.40	102.70	106.20	160.00	0.00	0.10	0.02	121.1%	2	6
6	—	193.5%	65.20	97.80	101.20	165.00	0.00	2.15	0.75	177.6%	—	5
—	—	—	—	—	—	170.00	0.00	2.15	0.10	168.0%	2	15
8	4	175.6%	101.10	87.80	91.30	175.00	0.00	1.70	0.10	151.5%	1	46
3	1	114.8%	96.80	83.00	86.60	180.00	0.00	2.15	0.11	149.5%	2	26
15	1	151.7%	85.50	78.00	81.10	185.00	0.00	2.15	0.11	140.5%	6	13
30	10	133.2%	78.61	72.90	75.70	190.00	0.00	1.00	0.35	113.9%	1	38
36	1	124.6%	68.50	67.70	70.70	195.00	0.00	1.65	0.10	116.7%	1	42
12	1	116.1%	57.17	63.00	65.70	200.00	0.00	0.20	0.05	77.2%	2	309
23	2	63.3%	67.50	53.60	55.70	210.00	0.00	0.45	0.10	73.2%	20	171
66	1	88.4%	42.60	43.00	46.00	220.00	0.10	0.60	0.34	65.2%	4	164
79	1	51.3%	46.20	33.60	36.20	230.00	0.50	1.00	0.80	60.9%	11	781
488	1	52.1%	31.05	24.30	27.20	240.00	1.25	3.30	1.50	64.4%	16	749
327	10	51.2%	17.74	15.90	19.10	250.00	1.75	5.10	3.90	55.1%	25	262
277	39	53.7%	10.80	10.80	11.80	260.00	5.80	8.40	6.75	56.0%	34	325
ILMN $264.57
179	262	51.3%	6.20	5.30	7.00	270.00	10.50	13.70	12.10	54.5%	14	678
235	206	51.2%	3.60	2.40	3.80	280.00	17.70	20.50	23.96	55.4%	4	102
361	22	60.2%	1.77	1.20	3.40	290.00	26.20	29.10	22.06	59.4%	2	20
620	167	58.6%	0.95	0.65	1.40	300.00	35.30	38.20	29.52	62.6%	1	122
101	10	66.2%	0.44	0.30	1.35	310.00	—	—	—	—	—	—
81	3	66.2%	0.28	0.00	0.80	320.00	—	—	—	—	—	—

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 ILMN put/call ratio?

For the October 16, 2026 expiration, the ILMN put/call ratio based on open interest is 1.30 (3,882 puts vs 2,982 calls), and 0.20 based on today's volume. A ratio above 1 means more puts than calls.

What is ILMN's implied volatility?

At-the-money implied volatility for ILMN options expiring October 16, 2026 is about 54.9%, an annualized estimate of how much the market expects Illumina stock to move.

How many ILMN option expiration dates are there?

ILMN has 7 listed expiration dates, from Oct 16, 2026 to Jan 21, 2028.

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.