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Arthur J. Gallagher & Co. logo

Arthur J. Gallagher & Co. (AJG) stock

AJGNYSEInsurance Agents, Brokers & ServiceFiscal year ends December 31
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 5, 2026Score 12/3016% below fair value
$276.07+7.87 (+2.93%)

Close on Oct 30, 2026Market cap $70.76BP/E 45.7Yield 0.94%

Price history

Arthur J. Gallagher share prices for every week, newest first. Adjusted for stock splits, not for dividends.

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Close, Oct 30, 2026
$276.07
+2.93% on the day
52-week range
$190.75 – $277.45
-0.5% from the high
Change over 52 weeks
+5.4%
From $262.03 on Oct 30, 2025
Average volume
1.50M
Shares a day, last 90 sessions
Week ofOpenHighLowCloseChangeVolume
Oct 26, 2026$267.15$277.45$255.75$276.07+3.00%10,974,649
Oct 19, 2026$252.12$272.80$249.73$268.04+5.16%8,129,368
Oct 12, 2026$233.54$255.40$231.86$254.88+9.53%5,961,574
Oct 5, 2026$225.00$235.94$219.65$232.70+2.91%6,230,930
Sep 28, 2026$230.00$234.13$225.11$226.11-2.16%8,887,311
Sep 21, 2026$239.72$240.71$225.87$231.10-3.50%8,022,839
Sep 14, 2026$245.58$254.59$238.75$239.48-0.35%7,107,008
Sep 8, 2026$257.68$258.39$240.32$240.32-8.52%4,472,439
Aug 31, 2026$264.13$271.27$260.04$262.69-1.82%7,881,666
Aug 24, 2026$265.00$272.79$259.26$267.56+1.42%6,839,993
Aug 17, 2026$248.99$264.21$246.88$263.81+5.02%6,189,638
Aug 10, 2026$247.00$257.12$245.33$251.21+1.25%6,311,166
Aug 3, 2026$251.21$255.98$240.82$248.12-0.52%6,374,038
Jul 27, 2026$249.42$269.99$242.28$249.42+0.67%7,880,299
Jul 20, 2026$250.93$255.50$240.98$247.77-2.41%5,601,820
Jul 13, 2026$255.97$261.92$246.35$253.90+0.32%7,532,573
Jul 6, 2026$251.36$256.87$247.88$253.09+0.26%8,204,823
Jun 29, 2026$226.44$252.96$223.26$252.44+11.69%8,997,405
Jun 22, 2026$213.92$226.56$208.08$226.01+5.58%11,269,472
Jun 15, 2026$217.38$224.99$211.29$214.06-2.12%7,380,625
Jun 8, 2026$213.48$225.34$211.50$218.69+1.18%10,149,710
Jun 1, 2026$200.57$216.73$199.69$216.14+7.47%8,077,294
May 26, 2026$202.96$208.99$200.04$201.11-1.78%6,790,634
May 18, 2026$199.88$210.24$198.88$204.75+2.40%7,638,339
May 11, 2026$197.95$202.91$190.75$199.95+0.54%11,812,655
May 4, 2026$207.89$211.08$194.15$198.87-4.44%9,563,152
Apr 27, 2026$213.13$218.88$202.21$208.11-3.38%9,485,485
Apr 20, 2026$221.60$226.00$213.98$215.38-2.81%6,391,646
Apr 13, 2026$214.28$225.69$213.65$221.61+3.77%8,126,931
Apr 6, 2026$217.16$222.52$206.21$213.55-1.87%11,807,654
Mar 30, 2026$208.01$221.34$206.50$217.61+5.07%8,534,236
Mar 23, 2026$217.37$218.83$205.90$207.10-3.59%10,280,125
Mar 16, 2026$209.97$216.15$204.58$214.82+3.31%11,278,947
Mar 9, 2026$226.90$226.90$203.21$207.93-8.85%11,984,015
Mar 2, 2026$227.58$231.10$221.48$228.13-0.03%11,589,954
Feb 23, 2026$214.55$228.81$209.44$228.20+5.40%12,896,329
Feb 17, 2026$212.26$221.00$206.93$216.51+3.87%11,808,798
Feb 9, 2026$240.12$242.00$195.00$208.45-13.71%24,096,773
Feb 2, 2026$250.42$255.18$239.33$241.58-3.12%10,400,697
Jan 26, 2026$253.70$256.60$236.53$249.37-1.52%11,597,438
Jan 20, 2026$255.60$257.67$244.98$253.21-2.05%9,034,818
Jan 12, 2026$265.13$266.87$253.39$258.52-2.29%11,952,502
Jan 5, 2026$254.78$266.67$253.19$264.59+3.36%7,239,738
Dec 29, 2025$261.54$263.79$254.34$256.00-2.10%4,656,520
Dec 22, 2025$251.96$261.91$251.37$261.48+3.19%4,133,726
Dec 15, 2025$254.21$257.37$249.13$253.39-0.78%11,291,128
Dec 8, 2025$238.77$256.18$236.34$255.38+6.54%8,834,876
Dec 1, 2025$248.40$249.47$238.65$239.71-3.19%7,683,487
Nov 24, 2025$251.26$252.44$244.72$247.62-1.51%4,828,723
Nov 17, 2025$259.41$261.63$245.69$251.41-2.75%9,462,509
Nov 10, 2025$248.88$262.59$247.03$258.51+3.40%8,061,313
Nov 3, 2025$249.49$253.00$239.47$250.01+0.21%9,936,930

Seasonality

AJG return in each calendar month over the last 10 years, including dividends. The current month runs to the latest close.

YearJanFebMarAprMayJunJulAugSepOctNovDec
Average1.7%1.8%-0.1%0.7%2.6%2.4%4.0%2.4%-0.7%2.9%4.7%-1.3%
Months up7 of 107 of 106 of 104 of 106 of 107 of 107 of 108 of 105 of 106 of 107 of 94 of 9
2026-3.6%-8.5%-4.8%-4.7%-2.6%14.5%8.6%5.1%-12.8%21.0%
20256.3%11.9%2.4%-7.1%8.3%-7.7%-10.3%5.4%2.5%-19.5%-0.7%4.8%
20243.2%5.3%2.5%-6.1%7.9%2.6%9.3%3.2%-3.6%-0.1%11.0%-8.9%
20233.8%-4.3%2.4%8.8%-3.7%9.9%-2.2%7.6%-1.1%3.3%6.0%-9.7%
2022-6.9%0.2%10.7%-3.5%-3.9%1.0%9.8%1.4%-5.4%9.3%6.4%-5.1%
2021-6.7%3.8%4.6%16.2%1.1%-4.1%-0.5%3.1%3.8%12.8%-2.8%4.5%
20207.7%-5.0%-16.0%-3.7%20.1%3.9%10.3%-2.0%0.7%-1.8%11.3%7.6%
20191.4%8.0%-2.7%7.1%0.7%4.5%3.2%0.3%-0.8%1.8%2.2%2.6%
20188.0%1.2%0.0%1.8%-4.7%-1.5%9.3%1.1%3.8%-0.6%4.1%-3.9%
20173.6%5.8%-0.0%-1.3%2.3%0.9%2.7%-0.8%6.3%2.9%4.6%-3.9%