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: Mar 19, 2027
Days to expiration: 159
Share price: $232.68
Put/call ratio (OI): 1.63
Put/call ratio (volume): 3.39
ATM implied volatility: 53.9%
Expected move: ±$82.84
Open interest (C / P): 1.61K / 2.62K

ALNY options summary

The ALNY options chain for the March 19, 2027 expiration lists 35 call and 26 put contracts, with 159 days until expiration. Open interest stands at 1,609 calls and 2,619 puts, a put/call ratio of 1.63, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $230.00 strike is 53.9%, which implies the market expects a move of about ±$82.84 (35.6%) in Alnylam Pharmaceuticals stock by expiration.

The most open interest sits at the $280.00 call (414 contracts) and the $200.00 put (1.77K contracts).

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

ALNY options chain · March 19, 2027

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	1	82.7%	128.00	124.10	127.90	110.00	0.50	3.90	0.80	75.0%	3	4
1	1	76.6%	114.50	110.30	114.00	125.00	—	—	—	—	—	—
2	1	71.9%	112.70	96.90	100.70	140.00	1.05	5.20	2.45	59.0%	1	4
4	1	163.0%	84.22	126.00	129.30	145.00	—	—	—	—	—	—
3	2	86.6%	141.00	94.20	97.70	150.00	1.00	4.30	11.30	50.2%	9	12
2	1	68.2%	89.00	84.20	88.00	155.00	—	—	—	—	—	—
0	1	—	77.58	0.00	0.00	160.00	2.00	5.70	9.30	55.9%	1	2
—	—	—	—	—	—	165.00	4.80	9.00	4.45	56.3%	10	5
1	1	65.0%	77.50	72.20	76.00	170.00	5.80	10.00	6.00	55.7%	11	10
—	—	—	—	—	—	180.00	8.20	12.40	9.01	54.8%	2	18
—	—	—	—	—	—	185.00	0.00	0.00	14.60	6.3%	1	0
5	3	62.2%	51.45	57.70	61.80	190.00	0.00	0.00	8.78	6.3%	1	0
2	1	61.1%	62.87	54.40	58.00	195.00	14.10	16.70	14.50	54.8%	1	22
8	8	62.3%	46.15	52.60	55.20	200.00	15.70	18.40	16.40	54.2%	1	1,773
48	20	59.7%	56.20	45.10	49.00	210.00	11.50	13.80	34.00	40.3%	5	13
21	5	57.5%	32.22	39.50	42.10	220.00	22.40	26.50	27.90	51.2%	2	24
45	20	57.7%	33.00	34.30	38.30	230.00	27.70	30.50	28.10	50.2%	1	14
ALNY $232.68
20	6	56.9%	23.00	29.60	33.70	240.00	32.40	36.40	40.90	52.7%	1	61
276	16	55.9%	20.61	25.30	29.40	250.00	38.00	42.10	31.10	51.8%	1	225
104	1	55.1%	27.20	21.40	25.60	260.00	44.30	48.20	41.30	50.8%	1	90
34	1	53.8%	16.20	18.10	21.50	270.00	50.90	54.90	44.10	50.1%	1	1
414	1	54.1%	14.20	15.30	19.40	280.00	58.10	62.10	70.78	49.6%	10	151
129	3	53.8%	10.30	12.80	17.00	290.00	65.80	69.70	51.20	49.2%	259	160
18	2	53.6%	11.05	10.80	14.90	300.00	73.80	77.70	61.30	48.9%	1	8
18	1	53.6%	14.20	9.00	13.20	310.00	80.30	84.00	47.90	44.2%	1	4
127	5	53.7%	12.50	7.60	11.70	320.00	90.80	94.60	78.37	48.5%	46	10
58	5	53.9%	10.90	6.30	10.50	330.00	76.30	80.30	70.37	—	2	0
36	3	54.0%	6.77	5.30	9.30	340.00	82.40	86.00	137.22	—	5	3
30	1	52.9%	8.39	4.30	7.50	350.00	117.90	121.70	104.54	48.7%	23	5
6	1	54.2%	6.60	3.50	7.50	360.00	—	—	—	—	—	—
44	1	54.2%	5.80	2.75	6.80	370.00	—	—	—	—	—	—
1	—	56.6%	15.50	3.00	6.70	380.00	—	—	—	—	—	—
6	1	78.0%	16.58	10.50	14.70	390.00	—	—	—	—	—	—
118	1	57.2%	3.00	2.50	5.20	400.00	—	—	—	—	—	—
16	—	56.9%	19.80	1.60	5.00	410.00	—	—	—	—	—	—
0	1	25.0%	11.81	0.00	0.00	440.00	—	—	—	—	—	—
9	2	58.2%	2.09	0.00	4.30	450.00	—	—	—	—	—	—
2	—	60.9%	25.60	0.05	4.20	470.00	—	—	—	—	—	—

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 March 19, 2027 expiration, the ALNY put/call ratio based on open interest is 1.63 (2,619 puts vs 1,609 calls), and 3.39 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 March 19, 2027 is about 53.9%, 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.