GRC · Gorman Rupp Co · Options Chain

Track GRC — free

$74.47 +1.24 (+1.69%)

Russell 2000 member Rebalance outlook locked

Market Cap

$1.93B

26.41M

Options Chain

Underlying $74.47 · today Options Calculator

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Positioning

Sep 18, 2026 · 7 days to expiry · 38 contracts · mixed daily-bar sessions · Feb 9, 2026–Sep 1, 2026; 20 unknown

Put / call OI

110.16

Put-heavy positioning

Open interest

4,891

as of Sep 9, 2026

Volume

—

dated and unknown daily-bar sessions

Max pain

$75.00

$0.53 above spot

ATM implied vol

40%

market's expected move

Open interest by strike

Calls Puts

100

105

110

115

120

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Sep 18 7d Oct 16 35d Dec 18 98d Mar 19 189d

Calls								Puts
OI	Vol	IV	Δ	Bid	Ask	Last	Strike	Last	Bid	Ask	Δ	IV	Vol	OI
—	—	—	—	$42.50	$47.00	—		—	$0.00	$4.80	—	—	—	—
Call · $30 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:54.186 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $30 Daily-bar session Unknown Quote as of 2026-09-11 19:59:54.163 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$37.50	$42.00	—		—	$0.00	$4.80	—	—	—	—
Call · $35 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:54.186 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $35 Daily-bar session Unknown Quote as of 2026-09-11 19:59:54.163 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$32.50	$37.00	—		—	$0.00	$4.80	—	—	—	—
Call · $40 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:54.186 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $40 Daily-bar session Unknown Quote as of 2026-09-11 19:58:34.983 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
1	1	—	—	$27.50	$32.00	$35.50		—	$0.00	$4.80	—	—	—	—
Call · $45 In the money Daily-bar session Jul 15, 2026 Quote as of 2026-09-11 19:59:54.186 UTC Last $35.50 Breakeven $80.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 9, 2026 Model this call Put · $45 Daily-bar session Unknown Quote as of 2026-09-11 19:58:34.983 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
1	1	—	—	$22.50	$27.00	$30.60		$0.20	$0.00	$0.10	—	—	8	38
Call · $50 In the money Daily-bar session Jul 15, 2026 Quote as of 2026-09-11 19:59:54.186 UTC Last $30.60 Breakeven $80.60 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 9, 2026 Model this call Put · $50 Daily-bar session Jun 12, 2026 Quote as of 2026-09-11 19:59:59.606 UTC Last $0.20 Breakeven $49.80 Implied vol — Delta — Gamma — Theta — Vega — Open interest 38 OI effective date Sep 9, 2026 Model this put
—	1	—	—	$17.50	$22.00	$22.26		$2.27	$0.00	$4.80	—	—	1	3
Call · $55 In the money Daily-bar session Apr 27, 2026 Quote as of 2026-09-11 19:59:54.186 UTC Last $22.26 Breakeven $77.26 Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $55 Daily-bar session Feb 26, 2026 Quote as of 2026-09-11 19:59:11.200 UTC Last $2.27 Breakeven $52.73 Implied vol — Delta — Gamma — Theta — Vega — Open interest 3 OI effective date Sep 9, 2026 Model this put
—	—	100.4%	0.948	$12.50	$17.00	—		$2.45	$0.00	$4.80	—	—	1	1
Call · $60 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:54.186 UTC Last — Breakeven — Implied vol 100.4% Delta 0.948 ≈95% ITM Gamma 0.01 Theta -0.084 Vega 0.011 Open interest — OI effective date — Model this call Put · $60 Daily-bar session Feb 18, 2026 Quote as of 2026-09-11 19:59:11.199 UTC Last $2.45 Breakeven $57.55 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 9, 2026 Model this put
11	10	69.4%	0.929	$7.50	$12.00	$25.25		$4.70	$0.00	$4.80	—	—	1	1
Call · $65 In the money Daily-bar session Jun 29, 2026 Quote as of 2026-09-11 19:59:54.186 UTC Last $25.25 Breakeven $90.25 Implied vol 69.4% Delta 0.929 ≈93% ITM Gamma 0.019 Theta -0.075 Vega 0.014 Open interest 11 OI effective date Sep 9, 2026 Model this call Put · $65 Daily-bar session Feb 9, 2026 Quote as of 2026-09-11 19:59:11.199 UTC Last $4.70 Breakeven $60.30 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 9, 2026 Model this put
3	1	38.6%	0.885	$2.50	$7.00	$4.80		$1.00	$0.00	$2.25	—	—	10	2.4k
Call · $70 In the money Daily-bar session Apr 8, 2026 Quote as of 2026-09-11 19:59:54.186 UTC Last $4.80 Breakeven $74.80 Implied vol 38.6% Delta 0.885 ≈88% ITM Gamma 0.049 Theta -0.062 Vega 0.02 Open interest 3 OI effective date Sep 9, 2026 Model this call Put · $70 Daily-bar session Aug 18, 2026 Quote as of 2026-09-11 19:59:15.400 UTC Last $1.00 Breakeven $69.00 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2.4k OI effective date Sep 9, 2026 Model this put
Underlying $74.47
15	5	—	—	$0.00	$4.80	$4.90		$1.20	$0.30	$3.50	-0.535	40%	1	2.4k
Call · $75 Daily-bar session Aug 24, 2026 Quote as of 2026-09-11 19:54:58.035 UTC Last $4.90 Breakeven $79.90 Implied vol — Delta — Gamma — Theta — Vega — Open interest 15 OI effective date Sep 9, 2026 Model this call Put · $75 In the money Daily-bar session Aug 14, 2026 Quote as of 2026-09-11 19:59:15.405 UTC Last $1.20 Breakeven $73.80 Implied vol 40% Delta -0.535 ≈53% ITM Gamma 0.096 Theta -0.113 Vega 0.041 Open interest 2.4k OI effective date Sep 9, 2026 Model this put
2	2	—	—	$0.00	$4.80	$0.90		$5.70	$3.60	$8.00	-0.861	46%	1	1
Call · $80 Daily-bar session Sep 1, 2026 Quote as of 2026-09-11 19:58:34.983 UTC Last $0.90 Breakeven $80.90 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 9, 2026 Model this call Put · $80 In the money Daily-bar session Sep 1, 2026 Quote as of 2026-09-11 19:55:35.083 UTC Last $5.70 Breakeven $74.30 Implied vol 46% Delta -0.861 ≈86% ITM Gamma 0.047 Theta -0.068 Vega 0.023 Open interest 1 OI effective date Sep 9, 2026 Model this put
3	1	—	—	$0.00	$4.80	$7.70		$8.00	$8.50	$13.00	-0.911	68.3%	2	—
Call · $85 Daily-bar session Jun 16, 2026 Quote as of 2026-09-11 19:58:34.983 UTC Last $7.70 Breakeven $92.70 Implied vol — Delta — Gamma — Theta — Vega — Open interest 3 OI effective date Sep 9, 2026 Model this call Put · $85 In the money Daily-bar session Aug 19, 2026 Quote as of 2026-09-11 19:58:09.577 UTC Last $8.00 Breakeven $77.00 Implied vol 68.3% Delta -0.911 ≈91% ITM Gamma 0.023 Theta -0.073 Vega 0.017 Open interest — OI effective date — Model this put
5	1	—	—	$0.00	$4.80	$0.15		—	$13.50	$18.00	-0.928	89.7%	—	—
Call · $90 Daily-bar session Aug 24, 2026 Quote as of 2026-09-11 19:59:30.197 UTC Last $0.15 Breakeven $90.15 Implied vol — Delta — Gamma — Theta — Vega — Open interest 5 OI effective date Sep 9, 2026 Model this call Put · $90 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:26.911 UTC Last — Breakeven — Implied vol 89.7% Delta -0.928 ≈93% ITM Gamma 0.015 Theta -0.083 Vega 0.014 Open interest — OI effective date — Model this put
3	2	—	—	$0.00	$4.80	$1.95		—	$18.50	$23.00	—	—	—	—
Call · $95 Daily-bar session Jul 20, 2026 Quote as of 2026-09-11 19:59:15.392 UTC Last $1.95 Breakeven $96.95 Implied vol — Delta — Gamma — Theta — Vega — Open interest 3 OI effective date Sep 9, 2026 Model this call Put · $95 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:21.832 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.80	—		—	$23.50	$28.00	—	—	—	—
Call · $100 Daily-bar session Unknown Quote as of 2026-09-11 19:58:34.983 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $100 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:24.877 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.80	—		—	$28.50	$33.00	—	—	—	—
Call · $105 Daily-bar session Unknown Quote as of 2026-09-11 19:58:34.983 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $105 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:56:41.733 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.80	—		—	$33.50	$38.00	—	—	—	—
Call · $110 Daily-bar session Unknown Quote as of 2026-09-11 19:58:34.983 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $110 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:57:33.751 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.80	—		—	$38.50	$43.00	—	—	—	—
Call · $115 Daily-bar session Unknown Quote as of 2026-09-11 19:58:34.983 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $115 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:11.824 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.80	—		—	$43.50	$48.00	—	—	—	—
Call · $120 Daily-bar session Unknown Quote as of 2026-09-11 19:58:34.983 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $120 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:12.096 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put

About this data

Each contract's last price, day range and volume belong to the daily-bar session shown in its details; unknown means the source omitted that timestamp. Open interest has its own effective date shown separately; implied volatility and greeks are model values computed when fetched. This chain has mixed daily-bar sessions · Feb 9, 2026–Sep 1, 2026; 20 unknown. Positioning totals are shown only when every returned open-interest value has the same known effective date. Bid and ask are real-time consolidated OPRA readings.

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) 122 filings 122 filers Visit website Investor relations