Alto Neuroscience (ANRO) Options Chain
NYSE: ANROHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Nov 20, 2026
- Days to expiration
- 40
- Share price
- $24.37
- Put/call ratio (OI)
- 0.76
- Put/call ratio (volume)
- 2.00
- ATM implied volatility
- 110.9%
- Expected move
- ±$8.95
- Open interest (C / P)
- 33 / 25
ANRO options summary
The ANRO options chain for the November 20, 2026 expiration lists 3 call and 6 put contracts, with 40 days until expiration. Open interest stands at 33 calls and 25 puts, a put/call ratio of 0.76, which is fairly balanced between calls and puts. At-the-money implied volatility near the $22.50 strike is 110.9%, which implies the market expects a move of about ±$8.95 (36.7%) in Alto Neuroscience stock by expiration.
The most open interest sits at the $45.00 call (14 contracts) and the $22.50 put (9 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ANRO options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| — | — | — | 15.00 | 0.00 | 4.90 | 0.40 | |||||
| — | — | — | 17.50 | 0.00 | 4.90 | 0.55 | |||||
| — | — | — | 20.00 | 0.00 | 4.90 | 0.80 | |||||
| — | — | — | 22.50 | 0.30 | 4.90 | 2.00 | |||||
| 0.95 | 0.00 | 4.90 | 35.00 | 9.40 | 12.50 | 8.80 | |||||
| 0.90 | 0.00 | 4.90 | 40.00 | 14.10 | 17.50 | 10.10 | |||||
| 0.30 | 0.00 | 4.90 | 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 ANRO put/call ratio?
For the November 20, 2026 expiration, the ANRO put/call ratio based on open interest is 0.76 (25 puts vs 33 calls), and 2.00 based on today's volume. A ratio above 1 means more puts than calls.
What is ANRO's implied volatility?
At-the-money implied volatility for ANRO options expiring November 20, 2026 is about 110.9%, an annualized estimate of how much the market expects Alto Neuroscience stock to move.
How many ANRO option expiration dates are there?
ANRO 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.