Alto Neuroscience (ANRO) Options Chain
NYSE: ANROHealth CareBiotechnology: Pharmaceutical PreparationsUSD
Market open · Delayed 15 min · as of Oct 9, 9:57 AM ET
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 7
- Share price
- $24.52
- Put/call ratio (OI)
- 0.39
- Put/call ratio (volume)
- 0.15
- ATM implied volatility
- 172.7%
- Expected move
- ±$5.86
- Open interest (C / P)
- 646 / 255
ANRO options summary
The ANRO options chain for the October 16, 2026 expiration lists 9 call and 7 put contracts, with 7 days until expiration. Open interest stands at 646 calls and 255 puts, a put/call ratio of 0.39, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $25.00 strike is 172.7%, which implies the market expects a move of about ±$5.86 (23.9%) in Alto Neuroscience stock by expiration.
The most open interest sits at the $35.00 call (168 contracts) and the $25.00 put (170 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ANRO options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 23.35 | 17.00 | 21.00 | 2.50 | 0.00 | 0.20 | 0.10 | |||||
| 8.20 | 0.00 | 0.00 | 15.00 | — | — | — | |||||
| — | — | — | 17.50 | 0.20 | 4.90 | 2.63 | |||||
| 10.35 | 1.50 | 6.20 | 20.00 | 0.00 | 1.35 | 0.70 | |||||
| 14.60 | 0.00 | 5.00 | 22.50 | 0.00 | 0.00 | 0.50 | |||||
| 0.82 | 0.00 | 5.00 | 25.00 | 0.10 | 5.00 | 0.20 | |||||
| 0.05 | 0.00 | 5.00 | 30.00 | 4.00 | 8.50 | 6.60 | |||||
| 0.05 | 0.00 | 5.00 | 35.00 | 9.00 | 12.40 | 3.60 | |||||
| 0.60 | 0.00 | 5.00 | 40.00 | — | — | — | |||||
| 0.35 | 0.00 | 5.00 | 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 October 16, 2026 expiration, the ANRO put/call ratio based on open interest is 0.39 (255 puts vs 646 calls), and 0.15 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 October 16, 2026 is about 172.7%, 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.