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: Oct 16, 2026
Days to expiration: 7
Share price: $232.68
Put/call ratio (OI): 0.60
Put/call ratio (volume): 0.58
ATM implied volatility: 57.7%
Expected move: ±$18.59
Open interest (C / P): 3.52K / 2.11K

ALNY options summary

The ALNY options chain for the October 16, 2026 expiration lists 18 call and 17 put contracts, with 7 days until expiration. Open interest stands at 3,521 calls and 2,111 puts, a put/call ratio of 0.60, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $230.00 strike is 57.7%, which implies the market expects a move of about ±$18.59 (8.0%) in Alnylam Pharmaceuticals stock by expiration.

The most open interest sits at the $250.00 call (1.20K contracts) and the $220.00 put (623 contracts).

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

ALNY options chain · October 16, 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	—	218.1%	104.00	80.80	84.50	150.00	—	—	—	—	—	—
1	—	204.6%	99.00	75.80	79.50	155.00	—	—	—	—	—	—
—	—	—	—	—	—	170.00	0.00	0.65	1.40	117.2%	—	4
—	—	—	—	—	—	175.00	0.00	2.50	0.99	140.7%	3	196
—	—	—	—	—	—	180.00	0.00	2.70	2.36	131.9%	—	10
1	—	61.7%	69.50	45.80	49.60	185.00	0.00	2.50	1.62	118.5%	2	3
10	—	55.1%	60.74	40.80	44.60	190.00	0.00	0.50	0.15	77.2%	1	197
—	—	—	—	—	—	195.00	0.00	0.70	1.00	73.0%	1	26
57	1	61.1%	30.60	31.10	34.80	200.00	0.00	1.50	0.20	75.6%	1	303
10	1	71.8%	20.00	21.40	24.40	210.00	0.00	1.90	1.47	59.8%	1	73
492	1	66.1%	13.00	12.60	16.10	220.00	0.40	2.35	2.01	55.4%	5	623
90	37	62.5%	6.44	5.40	9.40	230.00	2.65	5.50	5.00	52.9%	3	161
ALNY $232.68
370	20	49.9%	2.52	2.10	3.50	240.00	8.40	12.30	21.50	62.2%	1	141
1,204	6	52.6%	1.05	0.20	1.50	250.00	16.50	20.30	22.79	68.7%	24	348
242	2	52.7%	0.50	0.05	0.50	260.00	25.90	29.70	19.61	52.2%	1	26
213	1	69.8%	0.20	0.00	1.30	270.00	35.70	39.50	53.90	59.1%	2	0
424	2	66.8%	0.20	0.05	0.35	280.00	—	—	—	—	—	—
172	2	98.0%	0.05	0.05	1.50	290.00	55.60	59.40	49.80	76.0%	—	0
192	1	110.8%	0.09	0.00	1.65	300.00	—	—	—	—	—	—
35	3	87.9%	0.25	0.00	0.20	310.00	75.60	79.30	54.40	90.8%	—	0
1	—	133.0%	0.69	0.00	1.70	320.00	—	—	—	—	—	—
6	1	164.4%	0.15	0.00	3.40	330.00	—	—	—	—	—	—
—	—	—	—	—	—	340.00	105.60	109.30	83.50	115.2%	—	0

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 October 16, 2026 expiration, the ALNY put/call ratio based on open interest is 0.60 (2,111 puts vs 3,521 calls), and 0.58 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 October 16, 2026 is about 57.7%, 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.