Annexon (ANNX) Options Chain
NASDAQ: ANNXHealth 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
- $4.02
- Put/call ratio (OI)
- 0.01
- Put/call ratio (volume)
- 0.06
- ATM implied volatility
- 306.6%
- Expected move
- ±$4.08
- Open interest (C / P)
- 141 / 2
ANNX options summary
The ANNX options chain for the November 20, 2026 expiration lists 5 call and 2 put contracts, with 40 days until expiration. Open interest stands at 141 calls and 2 puts, a put/call ratio of 0.01, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $4.00 strike is 306.6%, which implies the market expects a move of about ±$4.08 (101.5%) in Annexon stock by expiration.
The most open interest sits at the $5.00 call (93 contracts) and the $3.00 put (1 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ANNX options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 1.45 | 0.00 | 3.80 | 3.00 | 0.00 | 1.20 | 0.45 | |||||
| 0.97 | 0.00 | 3.20 | 4.00 | 0.00 | 3.10 | 1.45 | |||||
| 0.55 | 0.00 | 1.05 | 5.00 | — | — | — | |||||
| 0.15 | 0.00 | 0.70 | 6.00 | — | — | — | |||||
| 0.45 | 0.00 | 2.65 | 7.00 | — | — | — | |||||
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 November 20, 2026 expiration, the ANNX put/call ratio based on open interest is 0.01 (2 puts vs 141 calls), and 0.06 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 November 20, 2026 is about 306.6%, 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.