Alnylam Pharmaceuticals (ALNY) Options Chain

NASDAQ: ALNYHealth CareBiotechnology: Pharmaceutical PreparationsUSD

232.68+8.15 (+3.63%)

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

Expiration date

Expiration: Nov 20, 2026
Days to expiration: 40
Share price: $232.68
Put/call ratio (OI): 0.77
Put/call ratio (volume): 2.48
ATM implied volatility: 57.3%
Expected move: ±$44.13
Open interest (C / P): 556 / 429

ALNY options summary

The ALNY options chain for the November 20, 2026 expiration lists 22 call and 19 put contracts, with 40 days until expiration. Open interest stands at 556 calls and 429 puts, a put/call ratio of 0.77, which is fairly balanced between calls and puts. At-the-money implied volatility near the $230.00 strike is 57.3%, which implies the market expects a move of about ±$44.13 (19.0%) in Alnylam Pharmaceuticals stock by expiration.

The most open interest sits at the $230.00 call (200 contracts) and the $230.00 put (163 contracts).

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

ALNY options chain · November 20, 2026

ALNY 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
1	—	78.6%	94.67	81.80	85.50	150.00	0.00	1.60	0.50	75.7%	4	5
2	—	75.8%	89.91	76.90	80.70	155.00	0.00	3.60	0.70	84.3%	2	6
1	—	73.4%	86.75	72.10	75.90	160.00	0.00	3.70	0.50	79.5%	1	2
2	—	71.3%	80.17	67.40	71.10	165.00	0.00	3.90	1.00	75.2%	14	15
2	—	69.7%	75.70	62.70	66.50	170.00	0.00	2.75	1.78	64.2%	3	5
2	—	68.8%	72.10	58.20	62.00	175.00	0.00	4.20	2.42	66.2%	—	2
2	—	67.3%	67.60	53.70	57.50	180.00	0.00	4.50	2.90	62.3%	45	15
3	1	65.8%	51.00	49.30	53.10	185.00	0.60	4.80	3.10	60.5%	1	3
2	—	64.9%	59.82	45.10	48.90	190.00	1.35	4.50	4.40	56.7%	1	5
2	—	62.6%	55.29	41.00	44.30	195.00	2.25	6.30	4.93	59.0%	1	24
—	—	—	—	—	—	200.00	3.30	7.50	6.15	58.9%	1	23
17	15	61.3%	28.64	29.70	33.60	210.00	6.10	10.10	8.26	57.9%	2	37
9	1	58.4%	19.20	23.20	26.20	220.00	9.40	13.50	15.60	56.4%	4	34
200	1	58.7%	18.50	17.50	21.50	230.00	14.80	17.10	16.00	55.9%	1	163
ALNY $232.68
27	5	60.2%	13.50	14.20	16.90	240.00	19.50	23.20	24.66	55.3%	28	41
45	1	56.7%	10.50	9.90	11.90	250.00	26.80	28.60	28.03	55.0%	33	40
36	1	56.5%	5.44	7.10	8.90	260.00	33.80	36.40	26.80	55.7%	2	5
65	18	56.8%	5.67	3.80	8.00	270.00	40.40	44.30	29.20	53.2%	1	4
26	1	57.1%	3.05	2.25	6.40	280.00	—	—	64.90	—	—	—
54	1	56.7%	2.35	1.10	4.90	290.00	—	—	—	—	—	—
11	1	57.2%	2.00	0.25	4.10	300.00	—	—	—	—	—	—
5	—	62.2%	2.10	0.00	4.30	310.00	—	—	—	—	—	—
42	12	65.9%	1.55	0.00	4.00	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 ALNY put/call ratio?

For the November 20, 2026 expiration, the ALNY put/call ratio based on open interest is 0.77 (429 puts vs 556 calls), and 2.48 based on today's volume. A ratio above 1 means more puts than calls.

What is ALNY's implied volatility?

At-the-money implied volatility for ALNY options expiring November 20, 2026 is about 57.3%, an annualized estimate of how much the market expects Alnylam Pharmaceuticals stock to move.

How many ALNY option expiration dates are there?

ALNY has 8 listed expiration dates, from Oct 16, 2026 to Jan 19, 2029.

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.