Atossa Therapeutics (ATOS) Options Chain
NASDAQ: ATOSHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 8, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 7
- Share price
- $2.42
- Put/call ratio (OI)
- 0.05
- Put/call ratio (volume)
- 0.26
- Expected move
- ±$0.1676
- Open interest (C / P)
- 495 / 27
ATOS options summary
The ATOS options chain for the October 16, 2026 expiration lists 9 call and 7 put contracts, with 7 days until expiration. Open interest stands at 495 calls and 27 puts, a put/call ratio of 0.05, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $2.00 strike is 50.0%, which implies the market expects a move of about ±$0.1676 (6.9%) in Atossa Therapeutics stock by expiration.
The most open interest sits at the $3.00 call (157 contracts) and the $1.00 put (12 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ATOS options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 1.37 | 0.00 | 0.00 | 1.00 | 0.00 | 0.00 | 0.10 | |||||
| 0.50 | 0.00 | 0.00 | 2.00 | 0.00 | 0.00 | 0.20 | |||||
| 0.05 | 0.00 | 0.00 | 3.00 | — | — | — | |||||
| 0.05 | 0.00 | 0.00 | 4.00 | 0.00 | 0.00 | 0.60 | |||||
| 0.36 | 0.00 | 0.00 | 5.00 | 2.30 | 3.30 | 2.40 | |||||
| 0.82 | 0.00 | 0.00 | 6.00 | 1.10 | 2.10 | 2.40 | |||||
| 0.05 | 0.00 | 0.00 | 7.00 | 4.20 | 5.20 | 2.45 | |||||
| 0.05 | 0.00 | 0.00 | 8.00 | 3.30 | 4.30 | 2.70 | |||||
| 0.05 | 0.00 | 0.00 | 9.00 | — | — | — | |||||
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 ATOS put/call ratio?
For the October 16, 2026 expiration, the ATOS put/call ratio based on open interest is 0.05 (27 puts vs 495 calls), and 0.26 based on today's volume. A ratio above 1 means more puts than calls.
What is ATOS's implied volatility?
At-the-money implied volatility for ATOS options expiring October 16, 2026 is about 50.0%, an annualized estimate of how much the market expects Atossa Therapeutics stock to move.
How many ATOS option expiration dates are there?
ATOS has 4 listed expiration dates, from Oct 16, 2026 to Apr 16, 2027.
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.