Alkermes (ALKS) Options Chain

NASDAQ: ALKSHealth CareBiotechnology: Pharmaceutical PreparationsUSD

40.11-1.34 (-3.22%)

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

Expiration date

Expiration: Oct 16, 2026
Days to expiration: 8
Share price: $40.11
Put/call ratio (OI): 2.66
Put/call ratio (volume): 3.78
ATM implied volatility: 62.4%
Expected move: ±$3.70
Open interest (C / P): 1.25K / 3.31K

ALKS options summary

The ALKS options chain for the October 16, 2026 expiration lists 14 call and 13 put contracts, with 8 days until expiration. Open interest stands at 1,245 calls and 3,311 puts, a put/call ratio of 2.66, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $40.00 strike is 62.4%, which implies the market expects a move of about ±$3.70 (9.2%) in Alkermes stock by expiration.

The most open interest sits at the $50.00 call (504 contracts) and the $44.00 put (2.33K contracts).

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

ALKS options chain · October 16, 2026

ALKS 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
4	4	76.8%	10.80	3.40	7.30	35.00	0.00	1.20	0.15	104.4%	10	104
11	20	56.7%	8.40	0.55	4.70	38.00	0.00	1.00	0.60	56.0%	21	13
—	—	—	—	—	—	39.00	0.00	1.80	1.00	59.3%	1	15
12	24	69.5%	6.45	0.00	3.40	40.00	0.00	2.50	1.16	55.2%	50	257
ALKS $40.11
162	10	64.9%	1.80	0.00	2.30	41.00	0.00	3.60	1.15	54.6%	16	76
14	6	65.8%	1.55	0.00	1.65	42.00	0.45	4.20	1.99	130.8%	10	10
193	2	101.3%	1.02	0.00	2.60	43.00	—	—	—	—	—	—
4	1	110.6%	2.11	0.00	2.45	44.00	3.70	4.30	2.60	68.1%	278	2,325
116	10	115.0%	0.54	0.00	2.15	45.00	3.20	7.00	4.74	63.3%	41	386
34	3	98.0%	0.35	0.00	1.15	46.00	3.90	7.90	2.60	171.1%	—	83
11	10	107.2%	1.00	0.00	1.15	47.00	5.20	8.90	6.37	74.4%	2	40
147	20	116.1%	0.70	0.00	1.15	48.00	6.10	9.90	2.93	75.2%	6	0
1	2	124.5%	0.65	0.00	1.15	49.00	6.80	10.90	3.90	203.3%	—	0
504	2	76.6%	0.09	0.00	0.10	50.00	8.00	11.90	8.03	78.9%	3	2
32	2	168.8%	0.10	0.00	1.15	55.00	—	—	—	—	—	—

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 ALKS put/call ratio?

For the October 16, 2026 expiration, the ALKS put/call ratio based on open interest is 2.66 (3,311 puts vs 1,245 calls), and 3.78 based on today's volume. A ratio above 1 means more puts than calls.

What is ALKS's implied volatility?

At-the-money implied volatility for ALKS options expiring October 16, 2026 is about 62.4%, an annualized estimate of how much the market expects Alkermes stock to move.

How many ALKS option expiration dates are there?

ALKS 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.