UTL · Unitil Corp

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$55.61 +0.33 (+0.60%) At close · Jul 24

Market Cap

$999.93M

17.99M

Options Chain

15-min delayed Underlying $55.61 · today Options Calculator

Positioning

Aug 21, 2026 · 27 days to expiry · 20 contracts

Put / call OI

1.00

Balanced positioning

Open interest

contracts outstanding

Volume

traded today

Max pain

$55.00

$0.61 below spot

ATM implied vol

33.6%

market's expected move

Open interest by strike

Calls Puts

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 27d Sep 18 55d Dec 18 146d Mar 19 237d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	127%	0.976	—		—	—	—	—	0
Call · $30 In the money Last — Breakeven — Implied vol 127% Delta 0.976 ≈98% ITM Gamma 0.003 Theta -0.018 Vega 0.011 Open interest 0 Model this call Put · $30 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	97.8%	0.97	—		—	—	—	—	0
Call · $35 In the money Last — Breakeven — Implied vol 97.8% Delta 0.97 ≈97% ITM Gamma 0.005 Theta -0.017 Vega 0.012 Open interest 0 Model this call Put · $35 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	72.6%	0.961	—		—	—	—	—	0
Call · $40 In the money Last — Breakeven — Implied vol 72.6% Delta 0.961 ≈96% ITM Gamma 0.008 Theta -0.016 Vega 0.013 Open interest 0 Model this call Put · $40 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	50.3%	0.947	—		—	-0.101	66%	—	0
Call · $45 In the money Last — Breakeven — Implied vol 50.3% Delta 0.947 ≈95% ITM Gamma 0.014 Theta -0.015 Vega 0.014 Open interest 0 Model this call Put · $45 Last — Breakeven — Implied vol 66% Delta -0.101 ≈10% ITM Gamma 0.018 Theta -0.033 Vega 0.024 Open interest 0 Model this put
0	—	—	—	—		$0.90	-0.138	37.8%	2	3
Call · $50 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $50 Last $0.90 Breakeven $49.10 Implied vol 37.8% Delta -0.138 ≈14% ITM Gamma 0.039 Theta -0.023 Vega 0.038 Open interest 3 Model this put
3	1	20.4%	0.586	$1.20		$2.60	-0.441	46.8%	1	2
Call · $55 In the money Last $1.20 Breakeven $56.20 Implied vol 20.4% Delta 0.586 ≈59% ITM Gamma 0.127 Theta -0.022 Vega 0.059 Open interest 3 Model this call Put · $55 Last $2.60 Breakeven $52.40 Implied vol 46.8% Delta -0.441 ≈44% ITM Gamma 0.056 Theta -0.052 Vega 0.059 Open interest 2 Model this put
Underlying $55.61
2	2	29.4%	0.18	$0.30		—	-0.838	27.5%	—	0
Call · $60 Last $0.30 Breakeven $60.30 Implied vol 29.4% Delta 0.18 ≈18% ITM Gamma 0.059 Theta -0.022 Vega 0.042 Open interest 2 Model this call Put · $60 In the money Last — Breakeven — Implied vol 27.5% Delta -0.838 ≈84% ITM Gamma 0.06 Theta -0.018 Vega 0.041 Open interest 0 Model this put
0	—	—	—	—		—	-0.826	56.8%	—	0
Call · $65 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $65 In the money Last — Breakeven — Implied vol 56.8% Delta -0.826 ≈83% ITM Gamma 0.03 Theta -0.04 Vega 0.043 Open interest 0 Model this put
0	—	—	—	—		—	-0.855	73.7%	—	0
Call · $70 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $70 In the money Last — Breakeven — Implied vol 73.7% Delta -0.855 ≈86% ITM Gamma 0.021 Theta -0.046 Vega 0.03 Open interest 0 Model this put
0	—	—	—	—		—	-0.873	87.5%	—	0
Call · $75 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $75 In the money Last — Breakeven — Implied vol 87.5% Delta -0.873 ≈87% ITM Gamma 0.016 Theta -0.049 Vega 0.031 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 755001 CUSIP 913259107 13F (30d) 46 filings 46 filers Visit website Investor relations