Illumina (ILMN) Options Chain

NASDAQ: ILMNHealth CareMedical SpecialitiesUSD

278.17+13.60 (+5.14%)

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

Expiration date

Expiration: Dec 18, 2026
Days to expiration: 68
Share price: $278.17
Put/call ratio (OI): 0.42
Put/call ratio (volume): 0.62
ATM implied volatility: 59.5%
Expected move: ±$71.49
Open interest (C / P): 3.07K / 1.29K

ILMN options summary

The ILMN options chain for the December 18, 2026 expiration lists 45 call and 35 put contracts, with 68 days until expiration. Open interest stands at 3,069 calls and 1,291 puts, a put/call ratio of 0.42, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $280.00 strike is 59.5%, which implies the market expects a move of about ±$71.49 (25.7%) in Illumina stock by expiration.

The most open interest sits at the $220.00 call (751 contracts) and the $195.00 put (171 contracts).

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

ILMN options chain · December 18, 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
—	—	—	—	—	—	65.00	0.00	0.75	0.97	149.8%	30	40
5	2	153.4%	185.00	207.10	210.50	70.00	0.00	0.00	0.35	50.0%	2	0
4	1	—	120.80	147.30	151.40	75.00	—	—	—	—	—	—
3	1	138.6%	180.80	192.30	195.70	85.00	0.00	0.00	0.68	50.0%	1	0
8	2	132.3%	154.50	187.30	190.70	90.00	0.00	2.50	1.15	141.9%	1	1
21	2	127.6%	178.00	182.30	185.80	95.00	—	—	—	—	—	—
8	1	—	93.86	117.70	121.60	100.00	0.00	0.00	0.42	50.0%	1	0
0	—	—	69.30	0.00	0.00	105.00	0.00	2.50	2.15	123.9%	5	8
10	6	114.4%	119.85	167.50	170.90	110.00	0.00	2.20	0.42	115.8%	2	35
4	1	110.3%	113.79	162.50	166.00	115.00	0.00	2.20	0.40	110.7%	1	4
19	3	107.2%	153.20	157.60	161.10	120.00	0.90	3.00	4.60	118.1%	8	8
4	1	104.0%	150.32	152.70	156.20	125.00	0.00	2.25	0.85	101.6%	4	14
17	1	100.2%	145.47	147.70	151.30	130.00	0.00	2.30	0.05	97.6%	12	20
10	2	96.4%	141.00	142.80	146.30	135.00	0.00	2.35	0.60	93.6%	1	40
4	1	94.0%	125.16	137.90	141.50	140.00	0.00	2.40	2.00	89.8%	1	6
33	1	91.5%	112.00	133.10	136.60	145.00	0.00	2.45	0.38	86.0%	1	54
6	1	88.5%	123.00	128.30	131.60	150.00	0.05	1.40	0.95	74.7%	2	35
0	2	—	69.00	0.00	0.00	155.00	0.15	1.10	0.65	69.5%	7	18
54	3	83.3%	114.17	118.90	121.60	160.00	0.20	1.80	0.72	71.8%	17	24
17	1	80.6%	80.82	114.00	116.80	165.00	0.30	1.95	0.95	69.9%	5	3
34	1	78.7%	105.20	109.10	112.20	170.00	0.40	1.90	0.90	66.7%	13	27
14	1	76.7%	62.00	104.50	107.30	175.00	0.40	2.30	1.99	65.4%	1	35
29	1	75.1%	100.03	99.70	102.80	180.00	0.20	3.50	1.80	66.4%	2	16
117	1	74.0%	97.30	95.40	98.00	185.00	0.75	3.20	2.95	63.9%	2	12
132	2	72.9%	89.73	90.90	93.50	190.00	1.30	3.50	2.45	63.4%	3	58
54	2	70.8%	85.00	86.10	89.00	195.00	1.30	4.40	4.09	62.7%	1	171
70	1	70.4%	69.80	82.00	84.60	200.00	2.75	3.90	3.33	61.7%	11	36
279	1	68.3%	56.29	73.40	76.10	210.00	3.50	5.80	4.85	60.7%	10	81
751	1	66.7%	73.60	65.20	68.00	220.00	5.70	8.60	6.70	62.4%	4	48
163	1	65.0%	81.47	57.60	60.00	230.00	7.90	9.60	8.70	59.5%	20	53
204	8	63.7%	65.52	50.00	53.10	240.00	10.40	12.50	13.75	58.6%	3	30
114	1	63.5%	30.50	44.00	46.40	250.00	13.40	16.70	15.90	58.8%	5	46
73	1	62.7%	34.00	37.50	40.80	260.00	17.20	20.50	19.66	58.0%	1	138
35	1	62.1%	28.42	32.50	34.90	270.00	21.80	25.50	27.00	58.1%	9	83
ILMN $278.17
80	6	61.1%	27.11	27.40	29.80	280.00	27.30	30.50	29.86	58.0%	1	72
101	7	60.5%	24.81	22.80	25.60	290.00	33.00	36.20	36.80	57.6%	2	63
120	1	60.9%	17.02	19.50	22.00	300.00	39.20	42.40	44.00	57.1%	1	12
33	2	60.0%	17.30	15.80	18.60	310.00	—	—	—	—	—	—
167	3	60.6%	9.19	13.60	15.90	320.00	—	—	—	—	—	—
63	4	59.9%	11.30	10.50	13.70	330.00	—	—	—	—	—	—
53	24	60.2%	8.50	8.50	11.90	340.00	—	—	—	—	—	—
141	194	61.3%	9.90	7.50	10.30	350.00	—	—	—	—	—	—
5	4	60.5%	10.90	5.40	8.90	360.00	—	—	—	—	—	—
3	1	62.0%	6.00	5.10	7.70	370.00	—	—	—	—	—	—
4	3	61.2%	7.75	3.30	6.90	380.00	—	—	—	—	—	—
3	1	62.6%	7.60	2.15	5.50	400.00	—	—	—	—	—	—

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 December 18, 2026 expiration, the ILMN put/call ratio based on open interest is 0.42 (1,291 puts vs 3,069 calls), and 0.62 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 December 18, 2026 is about 59.5%, 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.