AJG · Arthur J. Gallagher & Co.

Track AJG — free

$251.21 -2.28 (-0.90%) At close · Aug 14

Market Cap

$64.44B

256.30M

Options Chain

Underlying $251.21 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 6 days to expiry · 54 contracts · mixed snapshot sessions · May 14, 2026–Aug 14, 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 6d Sep 18 34d Oct 16 62d Nov 20 97d Dec 18 125d Jan 15 153d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	257.3%	0.984	—		$0.60	-0.013	245.4%	1	1
Call · $130 In the money Snapshot session Unknown Last — Breakeven — Implied vol 257.3% Delta 0.984 ≈98% ITM Gamma 0 Theta -0.277 Vega 0.012 Open interest 0 Model this call Put · $130 Snapshot session May 21, 2026 Last $0.60 Breakeven $129.40 Implied vol 245.4% Delta -0.013 ≈1% ITM Gamma 0 Theta -0.216 Vega 0.012 Open interest 1 Model this put
0	—	248.2%	0.982	—		—	-0.014	232.7%	—	0
Call · $135 In the money Snapshot session Unknown Last — Breakeven — Implied vol 248.2% Delta 0.982 ≈98% ITM Gamma 0.001 Theta -0.296 Vega 0.012 Open interest 0 Model this call Put · $135 Snapshot session Unknown Last — Breakeven — Implied vol 232.7% Delta -0.014 ≈1% ITM Gamma 0 Theta -0.214 Vega 0.012 Open interest 0 Model this put
0	—	231.4%	0.982	—		$0.25	-0.015	220.4%	1	1
Call · $140 In the money Snapshot session Unknown Last — Breakeven — Implied vol 231.4% Delta 0.982 ≈98% ITM Gamma 0.001 Theta -0.273 Vega 0.012 Open interest 0 Model this call Put · $140 Snapshot session Jul 20, 2026 Last $0.25 Breakeven $139.75 Implied vol 220.4% Delta -0.015 ≈1% ITM Gamma 0.001 Theta -0.212 Vega 0.012 Open interest 1 Model this put
0	—	199.4%	0.988	—		—	-0.015	208.6%	—	0
Call · $145 In the money Snapshot session Unknown Last — Breakeven — Implied vol 199.4% Delta 0.988 ≈99% ITM Gamma 0 Theta -0.168 Vega 0.013 Open interest 0 Model this call Put · $145 Snapshot session Unknown Last — Breakeven — Implied vol 208.6% Delta -0.015 ≈2% ITM Gamma 0.001 Theta -0.211 Vega 0.013 Open interest 0 Model this put
2	2	211.2%	0.979	$50.20		$0.75	-0.016	197.3%	15	6
Call · $150 In the money Snapshot session May 15, 2026 Last $50.20 Breakeven $200.20 Implied vol 211.2% Delta 0.979 ≈98% ITM Gamma 0.001 Theta -0.288 Vega 0.013 Open interest 2 Model this call Put · $150 Snapshot session May 26, 2026 Last $0.75 Breakeven $149.25 Implied vol 197.3% Delta -0.016 ≈2% ITM Gamma 0.001 Theta -0.209 Vega 0.013 Open interest 6 Model this put
0	—	206.2%	0.974	—		$0.05	-0.013	176.7%	100	100
Call · $155 In the money Snapshot session Unknown Last — Breakeven — Implied vol 206.2% Delta 0.974 ≈97% ITM Gamma 0.001 Theta -0.333 Vega 0.026 Open interest 0 Model this call Put · $155 Snapshot session Jul 31, 2026 Last $0.05 Breakeven $154.95 Implied vol 176.7% Delta -0.013 ≈1% ITM Gamma 0.001 Theta -0.156 Vega 0.013 Open interest 100 Model this put
0	—	192.1%	0.974	—		$0.73	-0.02	179.4%	1	1
Call · $160 In the money Snapshot session Unknown Last — Breakeven — Implied vol 192.1% Delta 0.974 ≈97% ITM Gamma 0.001 Theta -0.313 Vega 0.027 Open interest 0 Model this call Put · $160 Snapshot session Jun 22, 2026 Last $0.73 Breakeven $159.27 Implied vol 179.4% Delta -0.02 ≈2% ITM Gamma 0.001 Theta -0.226 Vega 0.013 Open interest 1 Model this put
0	—	174.2%	0.977	—		$0.10	-0.038	195.2%	1	4
Call · $165 In the money Snapshot session Unknown Last — Breakeven — Implied vol 174.2% Delta 0.977 ≈98% ITM Gamma 0.001 Theta -0.261 Vega 0.014 Open interest 0 Model this call Put · $165 Snapshot session Jul 20, 2026 Last $0.10 Breakeven $164.90 Implied vol 195.2% Delta -0.038 ≈4% ITM Gamma 0.001 Theta -0.421 Vega 0.027 Open interest 4 Model this put
0	—	156.6%	0.979	—		$5.20	-0.021	155.3%	1	1
Call · $170 In the money Snapshot session Unknown Last — Breakeven — Implied vol 156.6% Delta 0.979 ≈98% ITM Gamma 0.001 Theta -0.217 Vega 0.014 Open interest 0 Model this call Put · $170 Snapshot session May 14, 2026 Last $5.20 Breakeven $164.80 Implied vol 155.3% Delta -0.021 ≈2% ITM Gamma 0.001 Theta -0.203 Vega 0.014 Open interest 1 Model this put
0	—	154.1%	0.972	—		$0.10	-0.024	149.2%	1	10
Call · $175 In the money Snapshot session Unknown Last — Breakeven — Implied vol 154.1% Delta 0.972 ≈97% ITM Gamma 0.001 Theta -0.266 Vega 0.028 Open interest 0 Model this call Put · $175 Snapshot session Jul 15, 2026 Last $0.10 Breakeven $174.90 Implied vol 149.2% Delta -0.024 ≈2% ITM Gamma 0.001 Theta -0.221 Vega 0.014 Open interest 10 Model this put
0	—	143.3%	0.97	—		$1.36	-0.023	136.2%	1	7
Call · $180 In the money Snapshot session Unknown Last — Breakeven — Implied vol 143.3% Delta 0.97 ≈97% ITM Gamma 0.001 Theta -0.26 Vega 0.028 Open interest 0 Model this call Put · $180 Snapshot session Jun 24, 2026 Last $1.36 Breakeven $178.64 Implied vol 136.2% Delta -0.023 ≈2% ITM Gamma 0.001 Theta -0.199 Vega 0.014 Open interest 7 Model this put
0	—	134.6%	0.967	—		$0.45	-0.033	134.3%	1	165
Call · $185 In the money Snapshot session Unknown Last — Breakeven — Implied vol 134.6% Delta 0.967 ≈97% ITM Gamma 0.002 Theta -0.27 Vega 0.029 Open interest 0 Model this call Put · $185 Snapshot session Jul 20, 2026 Last $0.45 Breakeven $184.55 Implied vol 134.3% Delta -0.033 ≈3% ITM Gamma 0.002 Theta -0.258 Vega 0.029 Open interest 165 Model this put
0	—	122.6%	0.966	—		$0.28	-0.027	117.3%	1	8
Call · $190 In the money Snapshot session Unknown Last — Breakeven — Implied vol 122.6% Delta 0.966 ≈97% ITM Gamma 0.002 Theta -0.249 Vega 0.029 Open interest 0 Model this call Put · $190 Snapshot session Jul 13, 2026 Last $0.28 Breakeven $189.72 Implied vol 117.3% Delta -0.027 ≈3% ITM Gamma 0.002 Theta -0.193 Vega 0.029 Open interest 8 Model this put
1	1	114.4%	0.962	$48.70		$0.40	-0.031	109.3%	102	36
Call · $195 In the money Snapshot session Jul 31, 2026 Last $48.70 Breakeven $243.70 Implied vol 114.4% Delta 0.962 ≈96% ITM Gamma 0.002 Theta -0.258 Vega 0.029 Open interest 1 Model this call Put · $195 Snapshot session Jul 24, 2026 Last $0.40 Breakeven $194.60 Implied vol 109.3% Delta -0.031 ≈3% ITM Gamma 0.002 Theta -0.203 Vega 0.029 Open interest 36 Model this put
5	24	103.1%	0.961	$60.40		$0.45	-0.037	101.4%	100	54
Call · $200 In the money Snapshot session Jul 13, 2026 Last $60.40 Breakeven $260.40 Implied vol 103.1% Delta 0.961 ≈96% ITM Gamma 0.002 Theta -0.237 Vega 0.03 Open interest 5 Model this call Put · $200 Snapshot session Jul 31, 2026 Last $0.45 Breakeven $199.55 Implied vol 101.4% Delta -0.037 ≈4% ITM Gamma 0.002 Theta -0.212 Vega 0.03 Open interest 54 Model this put
4	1	86.1%	0.951	$49.67		$0.37	-0.041	81.4%	1	152
Call · $210 In the money Snapshot session Jul 13, 2026 Last $49.67 Breakeven $259.67 Implied vol 86.1% Delta 0.951 ≈95% ITM Gamma 0.004 Theta -0.241 Vega 0.031 Open interest 4 Model this call Put · $210 Snapshot session Aug 6, 2026 Last $0.37 Breakeven $209.63 Implied vol 81.4% Delta -0.041 ≈4% ITM Gamma 0.003 Theta -0.187 Vega 0.031 Open interest 152 Model this put
38	5	70.5%	0.933	$33.55		$0.28	-0.047	62.4%	13	187
Call · $220 In the money Snapshot session Jul 31, 2026 Last $33.55 Breakeven $253.55 Implied vol 70.5% Delta 0.933 ≈93% ITM Gamma 0.006 Theta -0.253 Vega 0.054 Open interest 38 Model this call Put · $220 Snapshot session Aug 14, 2026 Last $0.28 Breakeven $219.72 Implied vol 62.4% Delta -0.047 ≈5% ITM Gamma 0.005 Theta -0.161 Vega 0.031 Open interest 187 Model this put
142	1	51.8%	0.909	$26.10		$0.44	-0.061	45%	11	354
Call · $230 In the money Snapshot session Aug 12, 2026 Last $26.10 Breakeven $256.10 Implied vol 51.8% Delta 0.909 ≈91% ITM Gamma 0.01 Theta -0.234 Vega 0.055 Open interest 142 Model this call Put · $230 Snapshot session Aug 14, 2026 Last $0.44 Breakeven $229.56 Implied vol 45% Delta -0.061 ≈6% ITM Gamma 0.008 Theta -0.143 Vega 0.032 Open interest 354 Model this put
473	1	42.1%	0.805	$16.60		$0.80	-0.132	32.4%	99	136
Call · $240 In the money Snapshot session Aug 12, 2026 Last $16.60 Breakeven $256.60 Implied vol 42.1% Delta 0.805 ≈81% ITM Gamma 0.02 Theta -0.318 Vega 0.085 Open interest 473 Model this call Put · $240 Snapshot session Aug 14, 2026 Last $0.80 Breakeven $239.20 Implied vol 32.4% Delta -0.132 ≈13% ITM Gamma 0.02 Theta -0.182 Vega 0.085 Open interest 136 Model this put
195	2	35%	0.554	$6.43		$3.92	-0.435	26.9%	3	244
Call · $250 In the money Snapshot session Aug 6, 2026 Last $6.43 Breakeven $256.43 Implied vol 35% Delta 0.554 ≈55% ITM Gamma 0.035 Theta -0.374 Vega 0.13 Open interest 195 Model this call Put · $250 Snapshot session Aug 14, 2026 Last $3.92 Breakeven $246.08 Implied vol 26.9% Delta -0.435 ≈44% ITM Gamma 0.045 Theta -0.274 Vega 0.13 Open interest 244 Model this put
Underlying $251.21
265	5	34.5%	0.231	$3.46		$11.50	-0.807	29.4%	1	87
Call · $260 Snapshot session Aug 13, 2026 Last $3.46 Breakeven $263.46 Implied vol 34.5% Delta 0.231 ≈23% ITM Gamma 0.027 Theta -0.284 Vega 0.089 Open interest 265 Model this call Put · $260 In the money Snapshot session Jul 31, 2026 Last $11.50 Breakeven $248.50 Implied vol 29.4% Delta -0.807 ≈81% ITM Gamma 0.029 Theta -0.202 Vega 0.089 Open interest 87 Model this put
136	12	48.4%	0.133	$0.65		$18.69	—	—	3	221
Call · $270 Snapshot session Aug 13, 2026 Last $0.65 Breakeven $270.65 Implied vol 48.4% Delta 0.133 ≈13% ITM Gamma 0.014 Theta -0.279 Vega 0.061 Open interest 136 Model this call Put · $270 In the money Snapshot session Jul 31, 2026 Last $18.69 Breakeven $251.31 Implied vol — Delta — Gamma — Theta — Vega — Open interest 221 Model this put
756	1	67.1%	0.118	$0.25		—	—	—	—	0
Call · $280 Snapshot session Aug 13, 2026 Last $0.25 Breakeven $280.25 Implied vol 67.1% Delta 0.118 ≈12% ITM Gamma 0.009 Theta -0.351 Vega 0.062 Open interest 756 Model this call Put · $280 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
191	156	64.4%	0.048	$0.15		—	—	—	—	0
Call · $290 Snapshot session Aug 10, 2026 Last $0.15 Breakeven $290.15 Implied vol 64.4% Delta 0.048 ≈5% ITM Gamma 0.005 Theta -0.17 Vega 0.036 Open interest 191 Model this call Put · $290 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
147	1	86.2%	0.064	$0.05		—	—	—	—	0
Call · $300 Snapshot session Aug 11, 2026 Last $0.05 Breakeven $300.05 Implied vol 86.2% Delta 0.064 ≈6% ITM Gamma 0.004 Theta -0.286 Vega 0.037 Open interest 147 Model this call Put · $300 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
2	1	91.2%	0.044	$0.15		—	—	—	—	0
Call · $310 Snapshot session Aug 3, 2026 Last $0.15 Breakeven $310.15 Implied vol 91.2% Delta 0.044 ≈4% ITM Gamma 0.003 Theta -0.222 Vega 0.038 Open interest 2 Model this call Put · $310 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	1	102.7%	0.04	$0.45		—	—	—	—	0
Call · $320 Snapshot session Jul 6, 2026 Last $0.45 Breakeven $320.45 Implied vol 102.7% Delta 0.04 ≈4% ITM Gamma 0.003 Theta -0.232 Vega 0.038 Open interest 1 Model this call Put · $320 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 · May 14, 2026–Aug 14, 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 354190 CUSIP 363576109 13F (30d) 1195 filings 1147 filers Visit website Investor relations