Alumis (ALMS) Options Chain

NASDAQ: ALMSHealth CareBiotechnology: Pharmaceutical PreparationsUSD

7.16+0.19 (+2.73%)

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

Expiration date

Expiration: Dec 18, 2026
Days to expiration: 68
Share price: $7.16
Put/call ratio (OI): 0.28
Put/call ratio (volume): 0.82
ATM implied volatility: 77.6%
Expected move: ±$2.40
Open interest (C / P): 7.28K / 2.01K

ALMS options summary

The ALMS options chain for the December 18, 2026 expiration lists 28 call and 24 put contracts, with 68 days until expiration. Open interest stands at 7,276 calls and 2,014 puts, a put/call ratio of 0.28, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $7.00 strike is 77.6%, which implies the market expects a move of about ±$2.40 (33.5%) in Alumis stock by expiration.

The most open interest sits at the $15.00 call (4.79K contracts) and the $7.00 put (752 contracts).

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

ALMS options chain · December 18, 2026

ALMS 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	—	23.82	22.10	26.40	1.00	0.00	0.05	0.05	234.4%	—	10
0	1	—	15.70	21.70	25.50	2.00	0.00	0.00	0.10	50.0%	5	8
5	—	—	13.10	20.60	24.50	3.00	—	—	—	—	—	—
0	4	—	23.50	0.00	0.00	4.00	—	—	—	—	—	—
99	15	685.9%	23.20	4.20	8.50	5.00	0.00	1.70	0.01	168.4%	1	2
—	—	—	—	—	—	6.00	—	—	0.50	—	—	—
618	500	83.4%	1.37	0.50	1.70	7.00	0.55	1.05	1.00	71.8%	10	752
ALMS $7.16
68	1	132.2%	1.09	0.50	2.15	8.00	1.15	3.00	1.30	124.9%	—	30
502	1	93.2%	0.75	0.05	1.10	9.00	1.10	3.70	2.55	92.0%	500	500
154	11	84.2%	0.30	0.05	0.55	10.00	1.65	3.80	3.30	143.3%	15	151
2	3	149.0%	0.60	0.00	1.70	11.00	1.75	6.40	3.45	89.8%	2	0
278	10	108.8%	0.05	0.00	0.60	12.00	3.50	6.50	4.40	90.6%	2	102
14	1	132.8%	0.25	0.00	0.85	13.00	—	—	—	—	—	—
5	1	183.3%	0.55	0.00	1.70	14.00	4.60	9.20	4.30	87.9%	—	20
4,785	60	132.8%	0.15	0.00	0.55	15.00	5.60	10.20	6.50	94.5%	4	45
—	—	—	—	—	—	16.00	6.60	11.20	6.91	100.8%	—	4
114	5	208.2%	0.88	0.00	1.70	17.00	8.80	12.30	8.00	195.1%	1	310
23	6	213.3%	0.30	0.00	1.40	20.00	10.60	15.30	10.65	135.2%	1	9
—	—	—	—	—	—	21.00	3.00	7.60	5.20	—	—	1
43	1	696.5%	10.00	3.70	7.50	22.00	12.60	17.30	14.30	144.1%	1	9
0	1	50.0%	7.80	0.00	0.00	23.00	—	—	—	—	—	—
11	5	209.4%	0.10	0.00	0.95	24.00	14.60	19.30	7.20	152.3%	2	0
55	5	240.8%	0.10	0.00	1.45	25.00	15.60	20.30	14.30	155.9%	1	0
11	1	257.2%	6.70	0.00	1.70	26.00	—	—	—	—	—	—
16	3	794.5%	8.75	4.10	8.00	27.00	7.00	11.70	7.70	—	1	13
202	1	229.1%	0.60	0.00	0.90	30.00	21.50	24.30	11.18	156.3%	2	0
5	1	591.8%	6.10	2.40	6.50	32.00	11.40	15.50	14.10	—	3	7
41	5	288.3%	2.90	0.00	1.70	35.00	—	—	—	—	—	—
23	5	293.9%	0.05	0.00	1.70	37.00	14.50	19.30	17.70	—	—	8
199	34	434.0%	0.10	0.00	4.80	40.00	17.60	21.60	20.00	—	10	33
2	1	313.1%	0.05	0.00	1.70	45.00	—	—	—	—	—	—

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 ALMS put/call ratio?

For the December 18, 2026 expiration, the ALMS put/call ratio based on open interest is 0.28 (2,014 puts vs 7,276 calls), and 0.82 based on today's volume. A ratio above 1 means more puts than calls.

What is ALMS's implied volatility?

At-the-money implied volatility for ALMS options expiring December 18, 2026 is about 77.6%, an annualized estimate of how much the market expects Alumis stock to move.

How many ALMS option expiration dates are there?

ALMS has 7 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.