Enanta Pharmaceuticals (ENTA) Options Chain
NASDAQ: ENTAHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 8, 4:00 PM ET · Delayed 15 min
After hours: 12.10 0.00%
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 8
- Share price
- $12.10
- Put/call ratio (OI)
- 0.64
- Put/call ratio (volume)
- 1.38
- ATM implied volatility
- 266.1%
- Expected move
- ±$4.77
- Open interest (C / P)
- 289 / 184
ENTA options summary
The ENTA options chain for the October 16, 2026 expiration lists 5 call and 4 put contracts, with 8 days until expiration. Open interest stands at 289 calls and 184 puts, a put/call ratio of 0.64, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $12.50 strike is 266.1%, which implies the market expects a move of about ±$4.77 (39.4%) in Enanta Pharmaceuticals stock by expiration.
The most open interest sits at the $12.50 call (257 contracts) and the $10.00 put (172 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ENTA options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| — | — | — | 7.50 | 0.00 | 0.00 | 0.10 | |||||
| — | — | — | 10.00 | 0.00 | 1.00 | 0.05 | |||||
| 0.50 | 0.00 | 2.40 | 12.50 | 0.95 | 4.80 | 2.60 | |||||
| 0.05 | 0.00 | 2.15 | 15.00 | 0.10 | 3.80 | 3.20 | |||||
| 0.90 | 0.00 | 2.70 | 17.50 | — | — | — | |||||
| 0.70 | 0.00 | 2.15 | 20.00 | — | — | — | |||||
| 0.35 | 0.00 | 0.00 | 25.00 | — | — | — | |||||
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 October 16, 2026 expiration, the ENTA put/call ratio based on open interest is 0.64 (184 puts vs 289 calls), and 1.38 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 October 16, 2026 is about 266.1%, 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.