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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 month, 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
MonthOpenHighLowCloseChangeVolume
Oct 2026$229.43$277.45$219.65$276.07+21.02%35,557,062
Sep 2026$264.43$271.27$225.11$228.11-12.98%30,614,017
Aug 2026$251.21$272.79$240.82$262.15+5.10%27,211,540
Jul 2026$230.81$269.99$229.63$249.42+8.65%35,022,425
Jun 2026$200.57$230.58$199.69$229.57+14.15%40,071,596
May 2026$217.00$218.88$190.75$201.11-2.56%38,197,199
Apr 2026$217.78$226.00$202.21$206.40-4.70%37,013,800
Mar 2026$227.58$231.10$203.21$216.58-5.09%50,072,774
Feb 2026$250.42$255.18$195.00$228.20-8.49%59,202,597
Jan 2026$257.11$266.87$236.53$249.37-3.64%41,077,303
Dec 2025$248.40$263.79$236.34$258.79+4.51%35,346,930
Nov 2025$249.49$262.59$239.47$247.62-0.75%32,289,475
Oct 2025$307.87$313.55$242.75$249.49-19.45%38,033,105
Sep 2025$303.17$310.49$285.80$309.74+2.31%29,830,191
Aug 2025$285.00$307.38$277.53$302.75+5.40%32,377,627
Jul 2025$320.12$323.25$281.83$287.25-10.27%30,018,871
Jun 2025$343.42$351.23$308.98$320.12-7.86%31,042,256
May 2025$317.59$348.30$313.41$347.44+8.34%25,239,081
Apr 2025$345.07$350.70$301.21$320.69-7.11%34,557,251
Mar 2025$336.87$346.95$318.24$345.24+2.22%34,744,197
Feb 2025$299.75$338.43$299.37$337.74+11.90%27,688,659
Jan 2025$285.39$307.74$275.56$301.82+6.33%39,023,397
Dec 2024$312.51$313.01$276.90$283.85-9.09%61,257,403
Nov 2024$281.75$316.72$279.60$312.24+11.04%18,926,755
Oct 2024$281.65$297.76$277.44$281.20-0.06%21,885,746
Sep 2024$292.90$301.04$274.25$281.37-3.83%17,355,131
Aug 2024$285.37$294.00$277.97$292.57+3.20%15,365,829
Jul 2024$260.00$287.60$257.58$283.49+9.32%16,445,390
Jun 2024$252.77$266.39$250.51$259.31+2.36%19,432,739
May 2024$234.47$259.35$234.33$253.33+7.94%15,899,647
Apr 2024$249.08$249.80$230.08$234.69-6.14%18,012,713
Mar 2024$243.71$256.10$241.22$250.04+2.50%16,981,867
Feb 2024$230.04$246.29$227.43$243.93+5.07%17,230,653
Jan 2024$224.86$241.27$223.43$232.16+3.24%20,058,610
Dec 2023$248.40$249.48$218.63$224.88-9.69%21,928,450
Nov 2023$235.81$254.00$233.98$249.00+5.74%17,851,971
Oct 2023$227.00$237.95$223.35$235.49+3.32%16,591,691
Sep 2023$231.22$237.64$224.47$227.93-1.11%15,930,059
Aug 2023$214.99$232.41$214.63$230.48+7.30%14,633,371
Jul 2023$219.00$221.92$212.39$214.80-2.17%14,439,307
Jun 2023$200.39$220.63$198.52$219.57+9.60%19,333,631
May 2023$207.82$219.23$199.00$200.33-3.72%19,849,234
Apr 2023$190.85$209.13$190.00$208.06+8.76%17,920,409
Mar 2023$186.49$192.20$174.45$191.31+2.11%26,581,258
Feb 2023$195.77$198.25$182.88$187.35-4.28%15,150,520
Jan 2023$188.74$202.37$185.41$195.72+3.81%14,119,615
Dec 2022$200.00$201.51$183.64$188.54-5.31%14,512,774
Nov 2022$188.08$199.61$183.61$199.11+6.43%19,375,475
Oct 2022$173.00$189.96$169.01$187.08+9.26%20,769,248
Sep 2022$180.32$189.36$167.93$171.22-5.70%22,809,386
Aug 2022$176.79$192.00$171.75$181.57+1.44%19,182,820
Jul 2022$163.10$184.88$160.60$178.99+9.78%13,832,023
Jun 2022$162.35$167.38$148.24$163.04+0.68%19,031,532
May 2022$171.70$172.82$150.49$161.94-3.89%19,973,840
Apr 2022$175.23$187.02$168.13$168.49-3.50%20,261,348
Mar 2022$157.71$177.12$148.52$174.60+10.37%22,052,946
Feb 2022$157.87$161.46$148.03$158.19+0.16%17,769,447
Jan 2022$169.29$169.99$147.33$157.94-6.91%23,005,177
Dec 2021$165.28$171.21$161.13$169.67+4.16%19,286,957
Nov 2021$167.79$168.50$158.61$162.90-2.84%18,815,539

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%