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Arthur J. Gallagher & Co.

AJG
Exchange
NYSE
Industry
Insurance Agents, Brokers & Service
SEC CIK
0000354190

In the last 90 days, Arthur J. Gallagher & Co. insiders filed 0 open-market purchases and 4 sales; 1,295 institutions reported holding it in 13F filings for Q2 2026, worth $54.7B in total; no superinvestor holds it.

13F holders, Q4 2024

Institutional positions in Arthur J. Gallagher & Co. as of Dec 31, 2024. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
1,325
+140 vs. Q3 2024
Shares held
232.4M
+45.8M (+24.5%) vs. Q3 2024
Total value
$65.9B
+$13.5B (+25.7%) vs. Q3 2024
New holders
220
561 more added
Sold out
80
331 more reduced

18 institutions that held it in Q3 2024 haven't filed for Q4 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q3 2024: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting AJG on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ4 2024: 1,325 institutions
Q1 2021: 732 institutionsQ2 2021: 779 institutionsQ3 2021: 775 institutionsQ4 2021: 854 institutionsQ1 2022: 817 institutionsQ2 2022: 823 institutionsQ3 2022: 865 institutionsQ4 2022: 921 institutionsQ1 2023: 951 institutionsQ2 2023: 976 institutionsQ3 2023: 999 institutionsQ4 2023: 1,082 institutionsQ1 2024: 1,130 institutionsQ2 2024: 1,153 institutionsQ3 2024: 1,203 institutionsQ4 2024: 1,325 institutionsQ1 2025: 1,360 institutionsQ2 2025: 1,380 institutionsQ3 2025: 1,342 institutionsQ4 2025: 1,299 institutionsQ1 2026: 1,248 institutionsQ2 2026: 1,295 institutions
Value heldQ4 2024: $65.9B
Q1 2021: $20.6BQ2 2021: $24.6BQ3 2021: $26.3BQ4 2021: $30.1BQ1 2022: $31.0BQ2 2022: $29.1BQ3 2022: $31.2BQ4 2022: $34.1BQ1 2023: $34.7BQ2 2023: $39.9BQ3 2023: $42.3BQ4 2023: $41.9BQ1 2024: $46.5BQ2 2024: $49.1BQ3 2024: $52.8BQ4 2024: $65.9BQ1 2025: $79.0BQ2 2025: $72.9BQ3 2025: $69.7BQ4 2025: $60.6BQ1 2026: $49.7BQ2 2026: $54.7B
Institutions holding AJG and their total value by quarter
QuarterHoldersValue
Q2 20261,295$54.7B
Q1 20261,248$49.7B
Q4 20251,299$60.6B
Q3 20251,342$69.7B
Q2 20251,380$72.9B
Q1 20251,360$79.0B
Q4 20241,325$65.9B
Q3 20241,203$52.8B
Q2 20241,153$49.1B
Q1 20241,130$46.5B
Q4 20231,082$41.9B
Q3 2023999$42.3B
Q2 2023976$39.9B
Q1 2023951$34.7B
Q4 2022921$34.1B
Q3 2022865$31.2B
Q2 2022823$29.1B
Q1 2022817$31.0B
Q4 2021854$30.1B
Q3 2021775$26.3B
Q2 2021779$24.6B
Q1 2021732$20.6B

Institutions, Q4 2024

Shares, value and share of portfolio for each institution holding Arthur J. Gallagher & Co.; share changes are against Q3 2024.

Institutions holding AJG in Q4 2024
InstitutionSharesValue% of portfolioChange in sharesAction
Walleye Capital LLC212,889$60.4M0.58%+204,095+2,320.8%Added
State Board of Administration of Florida Retirement System213,084$60.5M0.12%+16,030+8.1%Added
Moore Capital Management, LP214,144$60.8M1.14%+214,144New
Freestone Grove Partners LP219,395$62.3M0.76%+219,395New
Employees Retirement System of Texas223,000$63.3M0.54%00.0%Unchanged
Great West Life Assurance Co230,506$65.4M0.11%+1,609+0.7%Added
Welch Group, LLC234,210$66.6M3.00%−836−0.4%Reduced
Nissay Asset Management Corp240,984$69.1M0.42%−34,495−12.5%Reduced
King Luther Capital Management Corp244,954$69.5M0.30%−987−0.4%Reduced
Jain Global LLC253,209$71.9M2.15%+253,209New
Comerica Bank253,307$71.9M0.29%+11,039+4.6%Added
Gillson Capital LP254,280$72.2M6.50%+254,280New
Capital Research Global Investors267,036$75.8M0.02%+4,982+1.9%Added
Woodley Farra Manion Portfolio Management Inc274,619$78.0M3.88%−980.0%Reduced
Oribel Capital Management, LP276,800$78.6M5.33%+276,800New
Bank of Montreal280,901$79.7M0.04%+28,333+11.2%Added
Kornitzer Capital Management Inc282,118$80.1M1.57%−7,940−2.7%Reduced
Westwood Holdings Group Inc.282,683$80.2M0.62%−6,968−2.4%Reduced
Soros Fund Management LLCSuperinvestorSoros Fund Management300,000$85.2M1.49%+300,000New
Welch & Forbes LLC300,141$85.2M1.10%−2,617−0.9%Reduced
Marshall Wace, LLP305,920$86.8M0.11%+290,098+1,833.5%Added
Ci Investments Inc.306,592$87.0M0.33%−29,536−8.8%Reduced
Universal- Beteiligungs- und Servicegesellschaft mbH312,758$88.8M0.18%+312,758New
Verition Fund Management LLC314,380$89.2M0.45%+314,380New
Nomura Asset Management Co Ltd324,359$92.1M0.28%+479+0.1%Added
Holocene Advisors, LP333,626$94.7M0.31%+333,626New
APG Asset Management N.V.348,034$95.4M0.27%+240,447+223.5%Added
Champlain Investment Partners, LLC343,280$97.4M0.62%−12,005−3.4%Reduced
Junto Capital Management LP345,300$98.0M1.95%+345,300New
Westfield Capital Management Co LP346,232$98.3M0.43%+117,007+51.0%Added
California State Teachers Retirement System351,594$99.8M0.12%+31,352+9.8%Added
Artisan Partners Limited Partnership361,276$102.5M0.16%−197,734−35.4%Reduced
Natixis Advisors, L.P.364,457$103.5M0.19%+12,504+3.6%Added
CCLA Investment Management Ltd385,937$109.5M1.74%+385,937New
Aviva PLC391,216$111.0M0.29%+37,196+10.5%Added
Close Asset Management Ltd392,644$111.5M3.14%00.0%Unchanged
Healthcare of Ontario Pension Plan Trust Fund394,595$112.0M0.24%+346,012+712.2%Added
Wells Fargo & Company395,137$112.2M0.03%+29,820+8.2%Added
Regions Financial Corp398,359$113.1M0.83%−4,309−1.1%Reduced
Samlyn Capital, LLC399,477$113.4M1.80%+399,477New
Fenimore Asset Management Inc404,002$114.7M2.41%−3,306−0.8%Reduced
Adage Capital Partners GP, L.L.C.408,403$115.9M0.20%+311,900+323.2%Added
Price T Rowe Associates Inc412,304$117.0M0.01%+32,156+8.5%Added
Rhumbline Advisers421,095$119.5M0.11%+20,044+5.0%Added
Alyeska Investment Group, L.P.422,472$119.9M0.45%+330,000+356.9%Added
Assenagon Asset Management S.A.437,464$124.2M0.22%+430,917+6,581.9%Added
National Pension Service445,721$126.5M0.12%−4,249−0.9%Reduced
Congress Asset Management Co456,502$129.6M0.88%+5,371+1.2%Added
Stonehage Fleming Financial Services Holdings Ltd462,397$131.3M3.67%−175,158−27.5%Reduced
Zacks Investment Management488,589$138.7M1.28%−53,936−9.9%Reduced
Deutsche Bank AG490,751$139.3M0.05%+101,860+26.2%Added
Kovitz Investment Group Partners, LLC497,477$141.2M0.69%+485,855+4,180.5%Added
Global Retirement Partners, LLC509,481$144.6M4.14%−390.0%Reduced
HSBC Holdings PLC519,437$147.5M0.09%−124,566−19.3%Reduced
BNP Paribas Arbitrage, SA521,614$148.1M0.11%+290,969+126.2%Added
Franklin Resources Inc526,861$149.5M0.04%+3,537+0.7%Added
Unisphere Establishment530,300$150.5M1.31%+509,800+2,486.8%Added
Barclays PLC531,044$150.7M0.07%−64,285−10.8%Reduced
Burkehill Global Management, LP550,000$156.1M14.85%+550,000New
Allianz Asset Management GmbH560,267$159.0M0.23%−35,061−5.9%Reduced
Sumitomo Mitsui Trust Holdings, Inc.561,330$159.3M0.11%+71,544+14.6%Added
Woodline Partners LP563,770$160.0M1.08%+457,464+430.3%Added
Lord, Abbett & Co. LLC571,019$162.1M0.51%+134,004+30.7%Added
Bank Julius Baer & Co. Ltd, Zurich533,761$162.9M0.50%+46,130+9.5%Added
Raymond James Financial Inc574,552$163.1M0.06%+574,552New
Axiom Investors LLC579,327$164.4M1.21%+254,038+78.1%Added
Bain Capital Public Equity Management II, LLC592,420$168.2M7.73%+592,420New
Burgundy Asset Management Ltd.601,954$170.9M1.73%+22,505+3.9%Added
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main622,916$176.8M0.19%−305,978−32.9%Reduced
Bessemer Group Inc626,401$177.8M0.29%−224,767−26.4%Reduced
Chilton Investment Co LLC636,499$180.7M4.64%+57,194+9.9%Added
Royal Bank of Canada649,251$184.3M0.04%−5,047−0.8%Reduced
Boston Partners677,113$192.5M0.23%−208,978−23.6%Reduced
Nuveen Asset Management, LLC683,206$193.9M0.05%+23,182+3.5%Added
Swiss National Bank705,100$200.1M0.13%+56,600+8.7%Added
Voya Investment Management LLC710,227$201.5M0.21%−58,955−7.7%Reduced
Amundi723,447$206.5M0.07%+275,832+61.6%Added
Dimensional Fund Advisors LP728,910$206.9M0.05%+48,431+7.1%Added
SEI Investments Co742,746$210.8M0.27%+560,325+307.2%Added
Zimmer Partners, LP750,000$212.9M3.69%+750,000New
Mawer Investment Management Ltd.761,948$216.3M0.98%−38,507−4.8%Reduced
Beck Mack & Oliver LLC771,326$218.9M4.05%+4,153+0.5%Added
Millennium Management LLC793,643$225.3M0.20%+751,020+1,762.0%Added
Guinness Asset Management LTD841,026$238.7M4.49%+41,795+5.2%Added
FIL Ltd858,487$243.7M0.23%+5,965+0.7%Added
TD Asset Management Inc892,709$253.4M0.22%+92,990+11.6%Added
Alliancebernstein L.P.938,410$266.4M0.09%+693,006+282.4%Added
Manufacturers Life Insurance Company, The944,484$268.1M0.23%+65,231+7.4%Added
Ghisallo Capital Management LLC950,000$269.7M15.74%+950,000New
California Public Employees Retirement System1,011,224$287.0M0.19%+16,173+1.6%Added
Goldman Sachs Group Inc1,135,252$322.2M0.06%−286,885−20.2%Reduced
UBS Group AG1,148,148$325.9M0.07%+598,823+109.0%Added
Findlay Park Partners LLP1,156,601$328.3M3.26%+295,400+34.3%Added
Legal & General Group Plc1,287,386$365.4M0.10%+79,257+6.6%Added
Bank of America Corp1,293,829$367.3M0.03%+181,979+16.4%Added
Balyasny Asset Management LLC1,319,505$374.5M0.87%+1,317,027+53,148.8%Added
Brown Brothers Harriman & Co1,420,137$403.1M2.83%−38,279−2.6%Reduced
UBS Asset Management Americas Inc1,438,960$408.4M0.10%+309,705+27.4%Added
Bank of New York Mellon Corp1,455,254$413.1M0.08%+47,585+3.4%Added
Envestnet Asset Management Inc1,478,054$419.5M0.13%+56,804+4.0%Added