Altimmune (ALT) Options Chain

NASDAQ: ALTHealth CareBiotechnology: Pharmaceutical PreparationsUSD

2.61+0.01 (+0.38%)

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

Expiration date

Expiration: Mar 19, 2027
Days to expiration: 159
Share price: $2.61
Put/call ratio (OI): 0.01
Put/call ratio (volume): 0.14
ATM implied volatility: 80.6%
Expected move: ±$1.39
Open interest (C / P): 5.31K / 48

ALT options summary

The ALT options chain for the March 19, 2027 expiration lists 11 call and 9 put contracts, with 159 days until expiration. Open interest stands at 5,306 calls and 48 puts, a put/call ratio of 0.01, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $2.50 strike is 80.6%, which implies the market expects a move of about ±$1.39 (53.2%) in Altimmune stock by expiration.

The most open interest sits at the $4.00 call (2.73K contracts) and the $3.00 put (22 contracts).

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

ALT options chain · March 19, 2027

ALT 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
219	12	298.4%	2.73	0.30	4.30	0.50	0.00	0.00	0.03	50.0%	1	0
3	1	118.8%	1.65	1.10	2.25	1.00	0.00	0.00	0.03	50.0%	—	0
—	—	—	—	—	—	1.50	0.05	0.75	0.09	167.6%	5	3
7	1	71.5%	0.85	0.30	1.30	2.00	0.00	0.90	0.20	121.5%	2	0
179	1	85.5%	0.75	0.40	0.85	2.50	0.20	0.70	0.40	75.6%	1	7
ALT $2.61
220	32	71.5%	0.45	0.20	0.50	3.00	0.50	1.00	0.74	73.0%	1	22
1,071	2	182.4%	0.45	0.00	1.95	3.50	0.90	1.45	0.91	80.1%	3	5
2,730	4	88.7%	0.26	0.20	0.30	4.00	—	—	—	—	—	—
301	10	86.7%	0.16	0.05	0.30	4.50	—	—	—	—	—	—
243	17	95.7%	0.15	0.15	0.20	5.00	1.80	3.10	1.97	70.3%	—	5
91	10	98.8%	0.15	0.10	0.20	5.50	—	—	—	—	—	—
242	1	100.0%	0.20	0.05	0.20	6.00	2.80	4.00	2.95	60.9%	—	6

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 ALT put/call ratio?

For the March 19, 2027 expiration, the ALT put/call ratio based on open interest is 0.01 (48 puts vs 5,306 calls), and 0.14 based on today's volume. A ratio above 1 means more puts than calls.

What is ALT's implied volatility?

At-the-money implied volatility for ALT options expiring March 19, 2027 is about 80.6%, an annualized estimate of how much the market expects Altimmune stock to move.

How many ALT option expiration dates are there?

ALT has 11 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.