ValuationViz

AON fund manager activity

Aon plc · NYSE. Reported by 20 tracked fund managers in their 13F filings, Q1 2020 to Q3 2026.

Q3 2026

ManagerActivitySharesValue% of portfolioFiled
David Katz - Matrix Asset AdvisorsSold out——0.00%Oct 13, 2026

Q2 2026

ManagerActivitySharesValue% of portfolioFiled
Seth Klarman - Baupost GroupTrimmed687,000$227,871,0004.21%Aug 13, 2026
William Von Mueffling - Cantillon Capital ManagementSold out——0.00%Jul 29, 2026
Dodge & Cox FundsAdded8,593,144$2,850,259,9331.49%Aug 13, 2026
First Pacific AdvisorsTrimmed681,367$226,002,6202.84%Aug 14, 2026
Ken Fisher - Fisher Asset ManagementNew2,797$927,8900.00%Aug 4, 2026
Joel Greenblatt - Gotham Asset ManagementTrimmed51,801$17,181,8740.04%Aug 14, 2026
Jensen Investment ManagementAdded25,789$8,553,9530.21%Aug 7, 2026
Thomas Gayner - Markel GroupNo change135,800$45,043,5030.34%Jul 31, 2026
David Katz - Matrix Asset AdvisorsNo change648$214,9350.02%Jul 15, 2026
Polen Capital ManagementTrimmed164,035$54,408,9540.47%Aug 4, 2026
Viking Global InvestorsAdded1,151,269$381,864,4151.09%Aug 14, 2026
Wallace Weitz - Weitz Investment ManagementNo change213,860$70,935,2234.91%Aug 12, 2026
Yacktman Asset ManagementNo change12,915$4,283,7760.05%Aug 11, 2026

Older quarters