ARTHUR J GALLAGHER & CO (AJG) Stock Institutional Trading Activity


ARTHUR J GALLAGHER & CO (AJG) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC, Viking Global Investors, Ariel Appreciation Fund, Sequoia Financial Advisors, and Torray Fund. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2023Torray FundBuy23320,964$4,714,384
Q4 2023Sequoia Financial AdvisorsBuy46,42450,274$11,305,546
Q3 2023Torray FundSell-49620,731$4,725,217
Q3 2023Sequoia Financial AdvisorsBuy663,850$877,543
Q3 2023Viking Global InvestorsBuy135,305957,820$218,315,913
Q2 2023Torray FundBuy50821,227$4,660,812
Q2 2023Renaissance Technologies LLCSell-104,40020,800$4,567
Q2 2023Sequoia Financial AdvisorsBuy723,784$830,863
Q2 2023Viking Global InvestorsSell-336,236822,515$180,599,619
Q1 2023Torray FundBuy20,71920,719$3,963,752
Q1 2023Sequoia Financial AdvisorsSell-913,712$710,149
Q4 2022Sequoia Financial AdvisorsBuy5363,803$717,020
Q3 2022Sequoia Financial AdvisorsSell-3713,267$559
Q2 2022Sequoia Financial AdvisorsBuy1,1063,638$593
Q2 2022Renaissance Technologies LLCSell-149,800125,200$20,413
Q1 2022Sequoia Financial AdvisorsBuy6932,532$442
Q1 2022Renaissance Technologies LLCBuy1,900275,000$48,015
Q4 2021Sequoia Financial AdvisorsSell-3751,839$312
Q4 2021Renaissance Technologies LLCSell-455,900273,100$46,337
Q3 2021Renaissance Technologies LLCBuy412,710729,000$108,366
Q2 2021Sequoia Financial AdvisorsSell-232,214$310
Q2 2021Renaissance Technologies LLCBuy131,990316,290$44,306
Q1 2021Sequoia Financial AdvisorsBuy2,2372,237$279
Q3 2020Renaissance Technologies LLCBuy200184,300$19,458
Q2 2020Renaissance Technologies LLCBuy88,700184,100$17,948
Q1 2020Renaissance Technologies LLCBuy7,60095,400$7,776
Q1 2020Viking Global InvestorsBuy682,9211,158,751$94,450
Q4 2019Renaissance Technologies LLCSell-54,50087,800$8,361
Q3 2019Renaissance Technologies LLCSell-94,400142,300$12,746
Q2 2019Renaissance Technologies LLCSell-130,700236,700$20,733

Frequently asked questions about AJG activity

  • Which institutional owners are buying AJG?

    Institutional owners buying AJG include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in AJG activity?

    "Buy" means an investor increased their reported position in AJG compared to the prior reporting period. This reflects growing exposure to ARTHUR J GALLAGHER & CO (AJG) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in AJG increasing?

    Institutional interest in AJG can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.