Enanta Pharmaceuticals (ENTA) Options Chain
NASDAQ: ENTAHealth 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
- $12.50
- Put/call ratio (OI)
- 1.07
- Put/call ratio (volume)
- 0.30
- ATM implied volatility
- 108.3%
- Expected move
- ±$4.48
- Open interest (C / P)
- 28 / 30
ENTA options summary
The ENTA options chain for the November 20, 2026 expiration lists 1 call and 1 put contracts, with 40 days until expiration. Open interest stands at 28 calls and 30 puts, a put/call ratio of 1.07, which is fairly balanced between calls and puts. At-the-money implied volatility near the $12.50 strike is 108.3%, which implies the market expects a move of about ±$4.48 (35.9%) in Enanta Pharmaceuticals stock by expiration.
The most open interest sits at the $15.00 call (28 contracts) and the $12.50 put (30 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ENTA options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| — | — | — | 12.50 | 0.00 | 3.60 | 1.55 | |||||
| 0.75 | 0.00 | 2.50 | 15.00 | — | — | — | |||||
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 ENTA put/call ratio?
For the November 20, 2026 expiration, the ENTA put/call ratio based on open interest is 1.07 (30 puts vs 28 calls), and 0.30 based on today's volume. A ratio above 1 means more puts than calls.
What is ENTA's implied volatility?
At-the-money implied volatility for ENTA options expiring November 20, 2026 is about 108.3%, an annualized estimate of how much the market expects Enanta Pharmaceuticals stock to move.
How many ENTA option expiration dates are there?
ENTA 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.