Annexon (ANNX) Options Chain
NASDAQ: ANNXHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Dec 18, 2026
- Days to expiration
- 68
- Share price
- $4.02
- Put/call ratio (OI)
- 0.37
- Put/call ratio (volume)
- 14.76
- ATM implied volatility
- 287.9%
- Expected move
- ±$5.00
- Open interest (C / P)
- 17.94K / 6.57K
ANNX options summary
The ANNX options chain for the December 18, 2026 expiration lists 13 call and 10 put contracts, with 68 days until expiration. Open interest stands at 17,936 calls and 6,571 puts, a put/call ratio of 0.37, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $4.00 strike is 287.9%, which implies the market expects a move of about ±$5.00 (124.3%) in Annexon stock by expiration.
The most open interest sits at the $5.00 call (6.97K contracts) and the $5.00 put (2.70K contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ANNX options chain · December 18, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 5.50 | 2.30 | 7.00 | 0.50 | 0.00 | 0.00 | 0.21 | |||||
| 4.14 | 1.50 | 6.40 | 1.00 | — | — | — | |||||
| 4.70 | 1.50 | 6.00 | 1.50 | 0.00 | 0.00 | 0.05 | |||||
| 2.00 | 0.00 | 4.50 | 2.00 | 0.00 | 3.10 | 0.37 | |||||
| 2.00 | 0.10 | 4.20 | 3.00 | 0.10 | 1.00 | 0.70 | |||||
| 1.50 | 0.00 | 3.40 | 4.00 | 0.00 | 4.10 | 1.24 | |||||
| 1.05 | 0.95 | 2.00 | 5.00 | 1.00 | 2.45 | 2.00 | |||||
| 0.90 | 0.50 | 3.70 | 6.00 | 0.50 | 5.30 | 2.50 | |||||
| 0.75 | 0.50 | 1.70 | 7.00 | 0.55 | 4.80 | 2.95 | |||||
| 0.50 | 0.00 | 3.40 | 8.00 | — | — | — | |||||
| 0.47 | 0.00 | 0.75 | 9.00 | — | — | — | |||||
| 0.50 | 0.35 | 0.55 | 10.00 | 4.00 | 6.80 | 6.30 | |||||
| 0.30 | 0.20 | 0.80 | 12.00 | 6.50 | 10.50 | 7.20 | |||||
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 December 18, 2026 expiration, the ANNX put/call ratio based on open interest is 0.37 (6,571 puts vs 17,936 calls), and 14.76 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 December 18, 2026 is about 287.9%, 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.