Armata Pharmaceuticals (ARMP) Options Chain
NYSE: ARMPHealth CareBiotechnology: Biological Products (No Diagnostic Substances)USD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Nov 20, 2026
- Days to expiration
- 40
- Share price
- $3.63
- Put/call ratio (OI)
- 2.89
- Put/call ratio (volume)
- 0.33
- ATM implied volatility
- 260.2%
- Expected move
- ±$3.13
- Open interest (C / P)
- 18 / 52
ARMP options summary
The ARMP options chain for the November 20, 2026 expiration lists 5 call and 1 put contracts, with 40 days until expiration. Open interest stands at 18 calls and 52 puts, a put/call ratio of 2.89, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $5.00 strike is 260.2%, which implies the market expects a move of about ±$3.13 (86.1%) in Armata Pharmaceuticals stock by expiration.
The most open interest sits at the $7.50 call (10 contracts) and the $5.00 put (52 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ARMP options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 1.25 | 0.00 | 3.20 | 5.00 | 1.30 | 1.70 | 0.95 | |||||
| 0.90 | 0.00 | 2.00 | 7.50 | — | — | — | |||||
| 0.40 | 0.00 | 0.75 | 10.00 | — | — | — | |||||
| 3.20 | 0.00 | 3.80 | 12.50 | — | — | — | |||||
| 0.80 | 0.00 | 3.70 | 15.00 | — | — | — | |||||
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 ARMP put/call ratio?
For the November 20, 2026 expiration, the ARMP put/call ratio based on open interest is 2.89 (52 puts vs 18 calls), and 0.33 based on today's volume. A ratio above 1 means more puts than calls.
What is ARMP's implied volatility?
At-the-money implied volatility for ARMP options expiring November 20, 2026 is about 260.2%, an annualized estimate of how much the market expects Armata Pharmaceuticals stock to move.
How many ARMP option expiration dates are there?
ARMP has 3 listed expiration dates, from Oct 16, 2026 to Feb 19, 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.