NPO · Enpro Inc.

Track NPO — free

$343.34 +7.20 (+2.14%) At close · Aug 14

Market Cap

$7.23B

21.17M

Options Chain

Underlying $343.34 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 6 days to expiry · 58 contracts · mixed snapshot sessions · Jun 18, 2026–Aug 14, 2026; 29 unknown

Put / call OI

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dated and unknown snapshot sessions

Open interest

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dated and unknown snapshot sessions

Volume

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dated and unknown snapshot sessions

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 6d Sep 18 34d Dec 18 125d Mar 19 216d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
1	1	0.1%	1	$118.00		—	-0.012	157.8%	—	0
Call · $220 In the money Snapshot session Jul 20, 2026 Last $118.00 Breakeven $338.00 Implied vol 0.1% Delta 1 ≈100% ITM Gamma 0 Theta -0.017 Vega 0 Open interest 1 Model this call Put · $220 Snapshot session Unknown Last — Breakeven — Implied vol 157.8% Delta -0.012 ≈1% ITM Gamma 0 Theta -0.172 Vega 0.018 Open interest 0 Model this put
0	—	—	—	—		—	-0.012	142.1%	—	0
Call · $230 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $230 Snapshot session Unknown Last — Breakeven — Implied vol 142.1% Delta -0.012 ≈1% ITM Gamma 0 Theta -0.159 Vega 0.019 Open interest 0 Model this put
1	1	0.1%	1	$102.50		—	-0.03	153.5%	—	0
Call · $240 In the money Snapshot session Jul 24, 2026 Last $102.50 Breakeven $342.50 Implied vol 0.1% Delta 1 ≈100% ITM Gamma 0 Theta -0.019 Vega 0 Open interest 1 Model this call Put · $240 Snapshot session Unknown Last — Breakeven — Implied vol 153.5% Delta -0.03 ≈3% ITM Gamma 0.001 Theta -0.371 Vega 0.039 Open interest 0 Model this put
0	—	—	—	—		—	-0.015	115.2%	—	0
Call · $250 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $250 Snapshot session Unknown Last — Breakeven — Implied vol 115.2% Delta -0.015 ≈1% ITM Gamma 0.001 Theta -0.152 Vega 0.02 Open interest 0 Model this put
0	—	0.1%	1	—		$3.30	-0.026	114.8%	1	1
Call · $260 In the money Snapshot session Unknown Last — Breakeven — Implied vol 0.1% Delta 1 ≈100% ITM Gamma 0 Theta -0.021 Vega 0 Open interest 0 Model this call Put · $260 Snapshot session Jul 8, 2026 Last $3.30 Breakeven $256.70 Implied vol 114.8% Delta -0.026 ≈3% ITM Gamma 0.001 Theta -0.248 Vega 0.04 Open interest 1 Model this put
0	—	—	—	—		—	-0.043	110.6%	—	0
Call · $270 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $270 Snapshot session Unknown Last — Breakeven — Implied vol 110.6% Delta -0.043 ≈4% ITM Gamma 0.002 Theta -0.355 Vega 0.041 Open interest 0 Model this put
0	—	—	—	—		$1.45	-0.045	94.6%	2	3
Call · $280 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $280 Snapshot session Aug 4, 2026 Last $1.45 Breakeven $278.55 Implied vol 94.6% Delta -0.045 ≈4% ITM Gamma 0.002 Theta -0.315 Vega 0.042 Open interest 3 Model this put
2	2	0.1%	1	$33.50		$1.70	-0.049	80.3%	12	4
Call · $290 In the money Snapshot session Aug 3, 2026 Last $33.50 Breakeven $323.50 Implied vol 0.1% Delta 1 ≈100% ITM Gamma 0 Theta -0.024 Vega 0 Open interest 2 Model this call Put · $290 Snapshot session Aug 4, 2026 Last $1.70 Breakeven $288.30 Implied vol 80.3% Delta -0.049 ≈5% ITM Gamma 0.003 Theta -0.29 Vega 0.042 Open interest 4 Model this put
0	—	—	—	—		$3.16	-0.058	67.7%	10	10
Call · $300 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $300 Snapshot session Aug 4, 2026 Last $3.16 Breakeven $296.84 Implied vol 67.7% Delta -0.058 ≈6% ITM Gamma 0.004 Theta -0.28 Vega 0.043 Open interest 10 Model this put
0	—	36.4%	0.985	—		$5.50	-0.07	54.3%	6	6
Call · $310 In the money Snapshot session Unknown Last — Breakeven — Implied vol 36.4% Delta 0.985 ≈99% ITM Gamma 0.002 Theta -0.074 Vega 0.022 Open interest 0 Model this call Put · $310 Snapshot session Aug 4, 2026 Last $5.50 Breakeven $304.50 Implied vol 54.3% Delta -0.07 ≈7% ITM Gamma 0.005 Theta -0.259 Vega 0.076 Open interest 6 Model this put
3	3	45%	0.89	$18.30		$2.14	-0.14	51.4%	53	53
Call · $320 In the money Snapshot session Aug 3, 2026 Last $18.30 Breakeven $338.30 Implied vol 45% Delta 0.89 ≈89% ITM Gamma 0.009 Theta -0.327 Vega 0.077 Open interest 3 Model this call Put · $320 Snapshot session Aug 12, 2026 Last $2.14 Breakeven $317.86 Implied vol 51.4% Delta -0.14 ≈14% ITM Gamma 0.01 Theta -0.406 Vega 0.116 Open interest 53 Model this put
0	—	43.4%	0.768	—		$4.81	-0.252	47.6%	53	124
Call · $330 In the money Snapshot session Unknown Last — Breakeven — Implied vol 43.4% Delta 0.768 ≈77% ITM Gamma 0.016 Theta -0.498 Vega 0.154 Open interest 0 Model this call Put · $330 Snapshot session Aug 12, 2026 Last $4.81 Breakeven $325.19 Implied vol 47.6% Delta -0.252 ≈25% ITM Gamma 0.015 Theta -0.536 Vega 0.154 Open interest 124 Model this put
6	10	36.9%	0.593	$4.00		$13.10	-0.419	43.7%	2	2
Call · $340 In the money Snapshot session Aug 10, 2026 Last $4.00 Breakeven $344.00 Implied vol 36.9% Delta 0.593 ≈59% ITM Gamma 0.023 Theta -0.528 Vega 0.179 Open interest 6 Model this call Put · $340 Snapshot session Aug 7, 2026 Last $13.10 Breakeven $326.90 Implied vol 43.7% Delta -0.419 ≈42% ITM Gamma 0.02 Theta -0.598 Vega 0.179 Open interest 2 Model this put
Underlying $343.34
16	1	39.4%	0.369	$5.00		$14.59	-0.622	42.2%	2	2
Call · $350 Snapshot session Aug 14, 2026 Last $5.00 Breakeven $355.00 Implied vol 39.4% Delta 0.369 ≈37% ITM Gamma 0.022 Theta -0.549 Vega 0.16 Open interest 16 Model this call Put · $350 In the money Snapshot session Jun 29, 2026 Last $14.59 Breakeven $335.41 Implied vol 42.2% Delta -0.622 ≈62% ITM Gamma 0.02 Theta -0.563 Vega 0.182 Open interest 2 Model this put
57	55	42.8%	0.213	$3.19		—	-0.779	44.7%	—	0
Call · $360 Snapshot session Aug 12, 2026 Last $3.19 Breakeven $363.19 Implied vol 42.8% Delta 0.213 ≈21% ITM Gamma 0.015 Theta -0.451 Vega 0.125 Open interest 57 Model this call Put · $360 In the money Snapshot session Unknown Last — Breakeven — Implied vol 44.7% Delta -0.779 ≈78% ITM Gamma 0.015 Theta -0.456 Vega 0.124 Open interest 0 Model this put
1	1	41.9%	0.095	$6.10		—	-0.877	47.7%	—	0
Call · $370 Snapshot session Jul 13, 2026 Last $6.10 Breakeven $376.10 Implied vol 41.9% Delta 0.095 ≈10% ITM Gamma 0.009 Theta -0.255 Vega 0.085 Open interest 1 Model this call Put · $370 In the money Snapshot session Unknown Last — Breakeven — Implied vol 47.7% Delta -0.877 ≈88% ITM Gamma 0.01 Theta -0.328 Vega 0.084 Open interest 0 Model this put
0	—	52.6%	0.076	—		—	-0.943	48.3%	—	0
Call · $380 Snapshot session Unknown Last — Breakeven — Implied vol 52.6% Delta 0.076 ≈8% ITM Gamma 0.006 Theta -0.272 Vega 0.086 Open interest 0 Model this call Put · $380 In the money Snapshot session Unknown Last — Breakeven — Implied vol 48.3% Delta -0.943 ≈94% ITM Gamma 0.006 Theta -0.179 Vega 0.048 Open interest 0 Model this put
2	2	62.2%	0.066	$1.02		—	-0.971	52%	—	0
Call · $390 Snapshot session Jul 28, 2026 Last $1.02 Breakeven $391.02 Implied vol 62.2% Delta 0.066 ≈7% ITM Gamma 0.005 Theta -0.285 Vega 0.05 Open interest 2 Model this call Put · $390 In the money Snapshot session Unknown Last — Breakeven — Implied vol 52% Delta -0.971 ≈97% ITM Gamma 0.003 Theta -0.108 Vega 0.023 Open interest 0 Model this put
2	1	71.2%	0.058	$2.45		—	-0.967	63.6%	—	0
Call · $400 Snapshot session Jul 27, 2026 Last $2.45 Breakeven $402.45 Implied vol 71.2% Delta 0.058 ≈6% ITM Gamma 0.004 Theta -0.296 Vega 0.051 Open interest 2 Model this call Put · $400 In the money Snapshot session Unknown Last — Breakeven — Implied vol 63.6% Delta -0.967 ≈97% ITM Gamma 0.003 Theta -0.151 Vega 0.045 Open interest 0 Model this put
1	1	83%	0.06	$1.65		—	-0.97	71.8%	—	0
Call · $410 Snapshot session Jul 27, 2026 Last $1.65 Breakeven $411.65 Implied vol 83% Delta 0.06 ≈6% ITM Gamma 0.003 Theta -0.35 Vega 0.051 Open interest 1 Model this call Put · $410 In the money Snapshot session Unknown Last — Breakeven — Implied vol 71.8% Delta -0.97 ≈97% ITM Gamma 0.002 Theta -0.157 Vega 0.024 Open interest 0 Model this put
1	1	88.6%	0.049	$1.10		$80.50	-0.983	73%	2	0
Call · $420 Snapshot session Jul 27, 2026 Last $1.10 Breakeven $421.10 Implied vol 88.6% Delta 0.049 ≈5% ITM Gamma 0.002 Theta -0.317 Vega 0.052 Open interest 1 Model this call Put · $420 In the money Snapshot session Jul 22, 2026 Last $80.50 Breakeven $339.50 Implied vol 73% Delta -0.983 ≈98% ITM Gamma 0.002 Theta -0.095 Vega 0.023 Open interest 0 Model this put
2	2	107%	0.065	$0.60		—	-0.969	90.6%	—	0
Call · $430 Snapshot session Jul 8, 2026 Last $0.60 Breakeven $430.60 Implied vol 107% Delta 0.065 ≈6% ITM Gamma 0.003 Theta -0.481 Vega 0.052 Open interest 2 Model this call Put · $430 In the money Snapshot session Unknown Last — Breakeven — Implied vol 90.6% Delta -0.969 ≈97% ITM Gamma 0.002 Theta -0.206 Vega 0.025 Open interest 0 Model this put
0	—	91.3%	0.023	—		—	-0.974	95.8%	—	0
Call · $440 Snapshot session Unknown Last — Breakeven — Implied vol 91.3% Delta 0.023 ≈2% ITM Gamma 0.001 Theta -0.174 Vega 0.027 Open interest 0 Model this call Put · $440 In the money Snapshot session Unknown Last — Breakeven — Implied vol 95.8% Delta -0.974 ≈97% ITM Gamma 0.002 Theta -0.188 Vega 0.025 Open interest 0 Model this put
1	1	113.2%	0.04	$5.20		$113.50	-0.983	96.7%	1	0
Call · $450 Snapshot session Jun 22, 2026 Last $5.20 Breakeven $455.20 Implied vol 113.2% Delta 0.04 ≈4% ITM Gamma 0.002 Theta -0.348 Vega 0.054 Open interest 1 Model this call Put · $450 In the money Snapshot session Jul 20, 2026 Last $113.50 Breakeven $336.50 Implied vol 96.7% Delta -0.983 ≈98% ITM Gamma 0.001 Theta -0.127 Vega 0.024 Open interest 0 Model this put
0	—	121.1%	0.038	—		—	-0.979	107.6%	—	0
Call · $460 Snapshot session Unknown Last — Breakeven — Implied vol 121.1% Delta 0.038 ≈4% ITM Gamma 0.002 Theta -0.358 Vega 0.054 Open interest 0 Model this call Put · $460 In the money Snapshot session Unknown Last — Breakeven — Implied vol 107.6% Delta -0.979 ≈98% ITM Gamma 0.001 Theta -0.174 Vega 0.025 Open interest 0 Model this put
1	1	137%	0.05	$2.10		—	-0.985	110.2%	—	0
Call · $470 Snapshot session Jun 23, 2026 Last $2.10 Breakeven $472.10 Implied vol 137% Delta 0.05 ≈5% ITM Gamma 0.002 Theta -0.501 Vega 0.055 Open interest 1 Model this call Put · $470 In the money Snapshot session Unknown Last — Breakeven — Implied vol 110.2% Delta -0.985 ≈98% ITM Gamma 0.001 Theta -0.133 Vega 0.024 Open interest 0 Model this put
0	—	139%	0.039	—		$111.00	-0.985	116.8%	1	0
Call · $480 Snapshot session Unknown Last — Breakeven — Implied vol 139% Delta 0.039 ≈4% ITM Gamma 0.001 Theta -0.423 Vega 0.055 Open interest 0 Model this call Put · $480 In the money Snapshot session Jun 23, 2026 Last $111.00 Breakeven $369.00 Implied vol 116.8% Delta -0.985 ≈99% ITM Gamma 0.001 Theta -0.135 Vega 0.024 Open interest 0 Model this put
1	1	140.6%	0.033	$1.15		—	-0.986	123.2%	—	0
Call · $490 Snapshot session Jun 23, 2026 Last $1.15 Breakeven $491.15 Implied vol 140.6% Delta 0.033 ≈3% ITM Gamma 0.001 Theta -0.372 Vega 0.028 Open interest 1 Model this call Put · $490 In the money Snapshot session Unknown Last — Breakeven — Implied vol 123.2% Delta -0.986 ≈99% ITM Gamma 0.001 Theta -0.138 Vega 0.024 Open interest 0 Model this put
2	1	167.7%	0.057	$0.90		—	-0.987	129.5%	—	0
Call · $500 Snapshot session Jun 18, 2026 Last $0.90 Breakeven $500.90 Implied vol 167.7% Delta 0.057 ≈6% ITM Gamma 0.001 Theta -0.678 Vega 0.056 Open interest 2 Model this call Put · $500 In the money Snapshot session Unknown Last — Breakeven — Implied vol 129.5% Delta -0.987 ≈99% ITM Gamma 0.001 Theta -0.141 Vega 0.023 Open interest 0 Model this put

About this data

Each contract's last price, volume, greeks, implied volatility and open interest belongs to the snapshot session shown in its details; unknown means the provider omitted the timestamp. This chain has mixed snapshot sessions · Jun 18, 2026–Aug 14, 2026; 29 unknown. Cross-contract positioning totals are shown only when every returned row has the same known session. 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. The 25 strikes around the money are shown by default — switch to "All 29" for the wings.

Key facts CIK 1164863 CUSIP 29355X107 13F (30d) 372 filings 368 filers Visit website Investor relations