Annexon (ANNX) Options Chain
NASDAQ: ANNXHealthcareBiotechnologyUSD
At close: Oct 8, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 7
- Share price
- $4.00
- Put/call ratio (OI)
- 0.18
- Put/call ratio (volume)
- 1.42
- Expected move
- ±$0.0022
- Open interest (C / P)
- 126 / 23
ANNX options summary
The ANNX options chain for the October 16, 2026 expiration lists 8 call and 6 put contracts, with 7 days until expiration. Open interest stands at 126 calls and 23 puts, a put/call ratio of 0.18, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $4.00 strike is 0.4%, which implies the market expects a move of about ±$0.0022 (0.1%) in Annexon stock by expiration.
The most open interest sits at the $10.00 call (62 contracts) and the $7.00 put (23 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ANNX options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 4.30 | 3.00 | 7.00 | 1.00 | — | — | — | |||||
| — | — | — | 3.00 | 0.00 | 0.00 | 0.05 | |||||
| 0.24 | 0.00 | 0.00 | 4.00 | 0.00 | 0.00 | 0.25 | |||||
| 0.03 | 0.00 | 0.00 | 5.00 | 0.00 | 0.00 | 0.90 | |||||
| 0.12 | 0.00 | 0.00 | 6.00 | 0.00 | 0.00 | 1.42 | |||||
| 0.35 | 0.00 | 0.90 | 7.00 | 0.70 | 4.90 | 2.07 | |||||
| 0.57 | 0.00 | 2.65 | 8.00 | 0.00 | 0.00 | 4.40 | |||||
| 0.50 | 0.00 | 2.75 | 9.00 | — | — | — | |||||
| 0.10 | 0.00 | 2.60 | 10.00 | — | — | — | |||||
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 ANNX put/call ratio?
For the October 16, 2026 expiration, the ANNX put/call ratio based on open interest is 0.18 (23 puts vs 126 calls), and 1.42 based on today's volume. A ratio above 1 means more puts than calls.
What is ANNX's implied volatility?
At-the-money implied volatility for ANNX options expiring October 16, 2026 is about 0.4%, an annualized estimate of how much the market expects Annexon stock to move.
How many ANNX option expiration dates are there?
ANNX has 7 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.