FSS · Federal Signal Corp /De/

Track FSS — free

$125.85 +2.79 (+2.27%) At close · Aug 14

Market Cap

$7.68B

61.04M

Options Chain

Underlying $125.85 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 4 days to expiry · 44 contracts · mixed snapshot sessions · Dec 23, 2025–Aug 13, 2026; 19 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 4d Sep 18 32d Nov 20 95d Feb 19 186d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	311.3%	0.99	—		—	—	—	—	0
Call · $60 In the money Snapshot session Unknown Last — Breakeven — Implied vol 311.3% Delta 0.99 ≈99% ITM Gamma 0.001 Theta -0.135 Vega 0.005 Open interest 0 Model this call Put · $60 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	279.6%	0.988	—		—	—	—	—	0
Call · $65 In the money Snapshot session Unknown Last — Breakeven — Implied vol 279.6% Delta 0.988 ≈99% ITM Gamma 0.001 Theta -0.132 Vega 0.005 Open interest 0 Model this call Put · $65 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	250.4%	0.987	—		—	—	—	—	0
Call · $70 In the money Snapshot session Unknown Last — Breakeven — Implied vol 250.4% Delta 0.987 ≈99% ITM Gamma 0.001 Theta -0.129 Vega 0.005 Open interest 0 Model this call Put · $70 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	1	223.3%	0.986	$35.30		$1.05	-0.027	259.7%	1	1
Call · $75 In the money Snapshot session Apr 2, 2026 Last $35.30 Breakeven $110.30 Implied vol 223.3% Delta 0.986 ≈99% ITM Gamma 0.001 Theta -0.126 Vega 0.006 Open interest 0 Model this call Put · $75 Snapshot session Dec 24, 2025 Last $1.05 Breakeven $73.95 Implied vol 259.7% Delta -0.027 ≈3% ITM Gamma 0.002 Theta -0.245 Vega 0.011 Open interest 1 Model this put
0	—	206.7%	0.981	—		$0.55	-0.03	230.8%	1	0
Call · $80 In the money Snapshot session Unknown Last — Breakeven — Implied vol 206.7% Delta 0.981 ≈98% ITM Gamma 0.002 Theta -0.151 Vega 0.006 Open interest 0 Model this call Put · $80 Snapshot session Apr 15, 2026 Last $0.55 Breakeven $79.45 Implied vol 230.8% Delta -0.03 ≈3% ITM Gamma 0.002 Theta -0.238 Vega 0.011 Open interest 0 Model this put
0	—	174.2%	0.983	—		$2.30	-0.049	231.3%	10	11
Call · $85 In the money Snapshot session Unknown Last — Breakeven — Implied vol 174.2% Delta 0.983 ≈98% ITM Gamma 0.002 Theta -0.12 Vega 0.006 Open interest 0 Model this call Put · $85 Snapshot session Jul 29, 2026 Last $2.30 Breakeven $82.70 Implied vol 231.3% Delta -0.049 ≈5% ITM Gamma 0.003 Theta -0.363 Vega 0.012 Open interest 11 Model this put
0	—	173.6%	0.966	—		$2.40	-0.067	217.3%	10	14
Call · $90 In the money Snapshot session Unknown Last — Breakeven — Implied vol 173.6% Delta 0.966 ≈97% ITM Gamma 0.003 Theta -0.208 Vega 0.012 Open interest 0 Model this call Put · $90 Snapshot session Jul 29, 2026 Last $2.40 Breakeven $87.60 Implied vol 217.3% Delta -0.067 ≈7% ITM Gamma 0.004 Theta -0.433 Vega 0.021 Open interest 14 Model this put
0	—	149.5%	0.961	—		$0.25	-0.052	164.2%	3	7
Call · $95 In the money Snapshot session Unknown Last — Breakeven — Implied vol 149.5% Delta 0.961 ≈96% ITM Gamma 0.004 Theta -0.2 Vega 0.013 Open interest 0 Model this call Put · $95 Snapshot session Jul 7, 2026 Last $0.25 Breakeven $94.75 Implied vol 164.2% Delta -0.052 ≈5% ITM Gamma 0.005 Theta -0.268 Vega 0.013 Open interest 7 Model this put
0	—	102.8%	0.98	—		$0.29	-0.051	131.4%	2	5
Call · $100 In the money Snapshot session Unknown Last — Breakeven — Implied vol 102.8% Delta 0.98 ≈98% ITM Gamma 0.003 Theta -0.083 Vega 0.006 Open interest 0 Model this call Put · $100 Snapshot session Jul 31, 2026 Last $0.29 Breakeven $99.71 Implied vol 131.4% Delta -0.051 ≈5% ITM Gamma 0.006 Theta -0.21 Vega 0.013 Open interest 5 Model this put
5	1	97.3%	0.957	$16.60		$0.35	-0.062	110.9%	3	17
Call · $105 In the money Snapshot session Jul 30, 2026 Last $16.60 Breakeven $121.60 Implied vol 97.3% Delta 0.957 ≈96% ITM Gamma 0.007 Theta -0.144 Vega 0.013 Open interest 5 Model this call Put · $105 Snapshot session Aug 4, 2026 Last $0.35 Breakeven $104.65 Implied vol 110.9% Delta -0.062 ≈6% ITM Gamma 0.008 Theta -0.21 Vega 0.023 Open interest 17 Model this put
4	2	69.4%	0.962	$9.70		$0.55	-0.071	84.9%	1	509
Call · $110 In the money Snapshot session Jun 17, 2026 Last $9.70 Breakeven $119.70 Implied vol 69.4% Delta 0.962 ≈96% ITM Gamma 0.008 Theta -0.096 Vega 0.013 Open interest 4 Model this call Put · $110 Snapshot session Aug 4, 2026 Last $0.55 Breakeven $109.45 Implied vol 84.9% Delta -0.071 ≈7% ITM Gamma 0.011 Theta -0.176 Vega 0.023 Open interest 509 Model this put
14	2	60.4%	0.914	$18.30		$1.40	-0.109	67.4%	1	4
Call · $115 In the money Snapshot session Aug 4, 2026 Last $18.30 Breakeven $133.30 Implied vol 60.4% Delta 0.914 ≈91% ITM Gamma 0.018 Theta -0.154 Vega 0.024 Open interest 14 Model this call Put · $115 Snapshot session Jul 30, 2026 Last $1.40 Breakeven $113.60 Implied vol 67.4% Delta -0.109 ≈11% ITM Gamma 0.02 Theta -0.193 Vega 0.024 Open interest 4 Model this put
103	5	44.1%	0.839	$8.50		$4.70	-0.228	60.2%	30	61
Call · $120 In the money Snapshot session Aug 10, 2026 Last $8.50 Breakeven $128.50 Implied vol 44.1% Delta 0.839 ≈84% ITM Gamma 0.039 Theta -0.174 Vega 0.036 Open interest 103 Model this call Put · $120 Snapshot session Jul 30, 2026 Last $4.70 Breakeven $115.30 Implied vol 60.2% Delta -0.228 ≈23% ITM Gamma 0.036 Theta -0.281 Vega 0.048 Open interest 61 Model this put
23	5	44.8%	0.566	$6.05		$2.50	-0.435	44.7%	1	62
Call · $125 In the money Snapshot session Aug 7, 2026 Last $6.05 Breakeven $131.05 Implied vol 44.8% Delta 0.566 ≈57% ITM Gamma 0.062 Theta -0.277 Vega 0.056 Open interest 23 Model this call Put · $125 Snapshot session Aug 4, 2026 Last $2.50 Breakeven $122.50 Implied vol 44.7% Delta -0.435 ≈43% ITM Gamma 0.063 Theta -0.267 Vega 0.056 Open interest 62 Model this put
Underlying $125.85
190	1	52%	0.303	$3.65		$16.50	-0.753	40.9%	1	1
Call · $130 Snapshot session Aug 3, 2026 Last $3.65 Breakeven $133.65 Implied vol 52% Delta 0.303 ≈30% ITM Gamma 0.048 Theta -0.282 Vega 0.05 Open interest 190 Model this call Put · $130 In the money Snapshot session Jul 20, 2026 Last $16.50 Breakeven $113.50 Implied vol 40.9% Delta -0.753 ≈75% ITM Gamma 0.056 Theta -0.194 Vega 0.05 Open interest 1 Model this put
1	1	51.4%	0.12	$1.30		—	—	—	—	0
Call · $135 Snapshot session Mar 16, 2026 Last $1.30 Breakeven $136.30 Implied vol 51.4% Delta 0.12 ≈12% ITM Gamma 0.028 Theta -0.159 Vega 0.026 Open interest 1 Model this call Put · $135 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
6	3	66.7%	0.082	$0.48		—	—	—	—	0
Call · $140 Snapshot session Jul 28, 2026 Last $0.48 Breakeven $140.48 Implied vol 66.7% Delta 0.082 ≈8% ITM Gamma 0.016 Theta -0.157 Vega 0.027 Open interest 6 Model this call Put · $140 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	2	84.4%	0.072	$1.95		—	—	—	—	0
Call · $145 Snapshot session Jul 30, 2026 Last $1.95 Breakeven $146.95 Implied vol 84.4% Delta 0.072 ≈7% ITM Gamma 0.012 Theta -0.181 Vega 0.016 Open interest 1 Model this call Put · $145 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	97%	0.06	—		$27.00	—	—	1	2
Call · $150 Snapshot session Unknown Last — Breakeven — Implied vol 97% Delta 0.06 ≈6% ITM Gamma 0.009 Theta -0.178 Vega 0.016 Open interest 0 Model this call Put · $150 In the money Snapshot session Aug 13, 2026 Last $27.00 Breakeven $123.00 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 Model this put
2	1	115.3%	0.062	$1.10		—	—	—	—	0
Call · $155 Snapshot session May 1, 2026 Last $1.10 Breakeven $156.10 Implied vol 115.3% Delta 0.062 ≈6% ITM Gamma 0.007 Theta -0.216 Vega 0.016 Open interest 2 Model this call Put · $155 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	143.8%	0.078	—		—	—	—	—	0
Call · $160 Snapshot session Unknown Last — Breakeven — Implied vol 143.8% Delta 0.078 ≈8% ITM Gamma 0.007 Theta -0.324 Vega 0.016 Open interest 0 Model this call Put · $160 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	1	141.3%	0.052	$0.95		—	—	—	—	0
Call · $165 Snapshot session Dec 23, 2025 Last $0.95 Breakeven $165.95 Implied vol 141.3% Delta 0.052 ≈5% ITM Gamma 0.005 Theta -0.23 Vega 0.017 Open interest 1 Model this call Put · $165 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — 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 · Dec 23, 2025–Aug 13, 2026; 19 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.

Key facts CIK 277509 CUSIP 313855108 13F (30d) 413 filings 408 filers Visit website Investor relations