ENTA · Enanta Pharmaceuticals Inc

Track ENTA — free Ask ALVIS about ENTA

$12.44 -0.17 (-1.35%)

Market Cap

$366.68M

29.08M

Options Chain

15-min delayed Underlying $12.44 · today Options Calculator

Positioning

Aug 21, 2026 · 23 days to expiry · 18 contracts

Put / call OI

1.71

Put-heavy positioning

Open interest

789

contracts outstanding

Volume

368

traded today

Max pain

$12.50

$0.06 above spot

ATM implied vol

60.2%

market's expected move

Open interest by strike

Calls Puts

2.5

7.5

12.5

17.5

22.5

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 23d Sep 18 51d Oct 16 79d Jan 15 170d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	420.5%	0.981	—		$0.02	—	—	80	34
Call · $2.5 In the money Last — Breakeven — Implied vol 420.5% Delta 0.981 ≈98% ITM Gamma 0.004 Theta -0.014 Vega 0.001 Open interest 0 Model this call Put · $2.5 Last $0.02 Breakeven $2.48 Implied vol — Delta — Gamma — Theta — Vega — Open interest 34 Model this put
0	—	220.6%	0.973	—		$0.05	—	—	4	4
Call · $5 In the money Last — Breakeven — Implied vol 220.6% Delta 0.973 ≈97% ITM Gamma 0.009 Theta -0.01 Vega 0.002 Open interest 0 Model this call Put · $5 Last $0.05 Breakeven $4.95 Implied vol — Delta — Gamma — Theta — Vega — Open interest 4 Model this put
0	—	146.2%	0.943	—		—	—	—	—	0
Call · $7.5 In the money Last — Breakeven — Implied vol 146.2% Delta 0.943 ≈94% ITM Gamma 0.025 Theta -0.012 Vega 0.004 Open interest 0 Model this call Put · $7.5 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	94.2%	0.854	—		$1.10	-0.183	117.8%	1	1
Call · $10 In the money Last — Breakeven — Implied vol 94.2% Delta 0.854 ≈85% ITM Gamma 0.078 Theta -0.016 Vega 0.007 Open interest 0 Model this call Put · $10 Last $1.10 Breakeven $8.90 Implied vol 117.8% Delta -0.183 ≈18% ITM Gamma 0.074 Theta -0.021 Vega 0.007 Open interest 1 Model this put
Underlying $12.44
11	10	69.2%	0.531	$1.00		$0.80	-0.482	51.1%	50	459
Call · $12.5 Last $1.00 Breakeven $13.50 Implied vol 69.2% Delta 0.531 ≈53% ITM Gamma 0.187 Theta -0.02 Vega 0.012 Open interest 11 Model this call Put · $12.5 In the money Last $0.80 Breakeven $11.70 Implied vol 51.1% Delta -0.482 ≈48% ITM Gamma 0.255 Theta -0.014 Vega 0.012 Open interest 459 Model this put
271	220	96.7%	0.26	$0.80		—	—	—	—	0
Call · $15 Last $0.80 Breakeven $15.80 Implied vol 96.7% Delta 0.26 ≈26% ITM Gamma 0.109 Theta -0.022 Vega 0.009 Open interest 271 Model this call Put · $15 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
9	3	135.5%	0.205	$0.70		—	—	—	—	0
Call · $17.5 Last $0.70 Breakeven $18.20 Implied vol 135.5% Delta 0.205 ≈20% ITM Gamma 0.067 Theta -0.026 Vega 0.01 Open interest 9 Model this call Put · $17.5 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	168%	0.178	—		—	—	—	—	0
Call · $20 Last — Breakeven — Implied vol 168% Delta 0.178 ≈18% ITM Gamma 0.05 Theta -0.03 Vega 0.007 Open interest 0 Model this call Put · $20 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	191.4%	0.162	—		—	—	—	—	0
Call · $22.5 Last — Breakeven — Implied vol 191.4% Delta 0.162 ≈16% ITM Gamma 0.041 Theta -0.032 Vega 0.007 Open interest 0 Model this call Put · $22.5 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put

About this data

Greeks, implied volatility, open interest and the last price come from the latest daily snapshot and are 15-minute delayed. Bid and ask are not included on this plan.

In-the-money strikes are tinted, deepening toward the money, and the bar beside each open-interest figure scales to the heaviest strike shown. Max pain is the listed strike where the most open interest would expire worthless — a positioning reference, not a forecast.

Key facts CIK 1177648 CUSIP 29251M106 13F (30d) 38 filings 17 filers Visit website Investor relations