GRC · Gorman Rupp Co

Track GRC — free Ask ALVIS about GRC

$81.67 +2.05 (+2.57%) At close · Jul 24

Market Cap

$2.16B

26.41M

Options Chain

15-min delayed Underlying $81.67 · today Options Calculator

Positioning

Aug 21, 2026 · 25 days to expiry · 24 contracts

Put / call OI

0.89

Balanced positioning

Open interest

contracts outstanding

Volume

traded today

Max pain

$80.00

$1.67 below spot

ATM implied vol

38.8%

market's expected move

Open interest by strike

Calls Puts

100

105

110

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 25d Sep 18 53d Dec 18 144d Mar 19 235d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	73.3%	0.984	—		—	—	—	—	0
Call · $55 In the money Last — Breakeven — Implied vol 73.3% Delta 0.984 ≈98% ITM Gamma 0.002 Theta -0.015 Vega 0.009 Open interest 0 Model this call Put · $55 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	66.2%	0.969	—		—	-0.054	79.2%	—	0
Call · $60 In the money Last — Breakeven — Implied vol 66.2% Delta 0.969 ≈97% ITM Gamma 0.005 Theta -0.022 Vega 0.019 Open interest 0 Model this call Put · $60 Last — Breakeven — Implied vol 79.2% Delta -0.054 ≈5% ITM Gamma 0.006 Theta -0.037 Vega 0.019 Open interest 0 Model this put
0	—	55.8%	0.949	—		$0.86	-0.096	72.2%	1	1
Call · $65 In the money Last — Breakeven — Implied vol 55.8% Delta 0.949 ≈95% ITM Gamma 0.009 Theta -0.028 Vega 0.019 Open interest 0 Model this call Put · $65 Last $0.86 Breakeven $64.14 Implied vol 72.2% Delta -0.096 ≈10% ITM Gamma 0.011 Theta -0.052 Vega 0.034 Open interest 1 Model this put
0	1	52.2%	0.887	$8.00		—	-0.164	66.3%	—	0
Call · $70 In the money Last $8.00 Breakeven $78.00 Implied vol 52.2% Delta 0.887 ≈89% ITM Gamma 0.017 Theta -0.047 Vega 0.035 Open interest 0 Model this call Put · $70 Last — Breakeven — Implied vol 66.3% Delta -0.164 ≈16% ITM Gamma 0.017 Theta -0.069 Vega 0.052 Open interest 0 Model this put
0	—	47.2%	0.778	—		$2.60	-0.272	63.1%	1	2
Call · $75 In the money Last — Breakeven — Implied vol 47.2% Delta 0.778 ≈78% ITM Gamma 0.029 Theta -0.064 Vega 0.071 Open interest 0 Model this call Put · $75 Last $2.60 Breakeven $72.40 Implied vol 63.1% Delta -0.272 ≈27% ITM Gamma 0.025 Theta -0.087 Vega 0.071 Open interest 2 Model this put
3	2	38.1%	0.609	$2.00		$6.00	-0.393	39.4%	2	4
Call · $80 In the money Last $2.00 Breakeven $82.00 Implied vol 38.1% Delta 0.609 ≈61% ITM Gamma 0.047 Theta -0.065 Vega 0.084 Open interest 3 Model this call Put · $80 Last $6.00 Breakeven $74.00 Implied vol 39.4% Delta -0.393 ≈39% ITM Gamma 0.046 Theta -0.062 Vega 0.084 Open interest 4 Model this put
Underlying $81.67
1	1	32.5%	0.347	$2.15		$4.70	-0.615	41.9%	1	1
Call · $85 Last $2.15 Breakeven $87.15 Implied vol 32.5% Delta 0.347 ≈35% ITM Gamma 0.053 Theta -0.053 Vega 0.077 Open interest 1 Model this call Put · $85 In the money Last $4.70 Breakeven $80.30 Implied vol 41.9% Delta -0.615 ≈62% ITM Gamma 0.043 Theta -0.066 Vega 0.087 Open interest 1 Model this put
3	1	34.8%	0.162	$2.40		—	-0.819	37.8%	—	0
Call · $90 Last $2.40 Breakeven $92.40 Implied vol 34.8% Delta 0.162 ≈16% ITM Gamma 0.033 Theta -0.037 Vega 0.061 Open interest 3 Model this call Put · $90 In the money Last — Breakeven — Implied vol 37.8% Delta -0.819 ≈82% ITM Gamma 0.033 Theta -0.038 Vega 0.06 Open interest 0 Model this put
1	1	45.8%	0.122	$2.65		—	—	—	—	0
Call · $95 Last $2.65 Breakeven $97.65 Implied vol 45.8% Delta 0.122 ≈12% ITM Gamma 0.02 Theta -0.04 Vega 0.042 Open interest 1 Model this call Put · $95 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	1	53%	0.084	$1.83		—	—	—	—	0
Call · $100 Last $1.83 Breakeven $101.83 Implied vol 53% Delta 0.084 ≈8% ITM Gamma 0.014 Theta -0.035 Vega 0.043 Open interest 1 Model this call Put · $100 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	65.5%	0.085	—		—	—	—	—	0
Call · $105 Last — Breakeven — Implied vol 65.5% Delta 0.085 ≈9% ITM Gamma 0.011 Theta -0.044 Vega 0.044 Open interest 0 Model this call Put · $105 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	76.1%	0.082	—		—	—	—	—	0
Call · $110 Last — Breakeven — Implied vol 76.1% Delta 0.082 ≈8% ITM Gamma 0.009 Theta -0.05 Vega 0.026 Open interest 0 Model this call Put · $110 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 42682 CUSIP 383082104 13F (30d) 40 filings 40 filers Visit website Investor relations