Data from public SEC 13F & STOCK Act filings, delayed up to ~45 days, partial holdings only — for research, not investment advice.
AON
AON PLCData as of 2026 Q1 (03-31) · 13F snapshot
Summary
AON PLC (AON) is held by 9 tracked hedge-fund managers, a combined reported value of ~$1.98B; the largest are Warren Buffett, Andreas Halvorsen, Seth Klarman. This quarter: 2 new, 3 added, 3 trimmed, 1 closed. 20 members of Congress have disclosed STOCK Act trades. Data as of 2026 Q1, from public SEC 13F filings, delayed up to ~45 days.
Attention · HighThis quarter · Mixed
Gurus holding9
Congress trades20
Price$335.31vs quarter-end+3.88%
Sectors1
This quarter's moves
Top holderWarren BuffettNew2
Added3
Trimmed / sold4
Value $350.90M1.0% of portfolio1,087,1142026 Q1
Seth KlarmanNew large stake
Value $248.22M4.9% of portfolio769,0002026 Q1
Value $14.27M— of portfolio44,2002026 Q1
Value $7.04M— of portfolio21,8002026 Q1
Value $4.81M— of portfolio14,9002026 Q1
Value $2.71M— of portfolio8,4002026 Q1
Value $776.3K— of portfolio2,2002025 Q4
Value $320.9K— of portfolio9002025 Q3
| Investor | Value | % of portfolio | Action |
|---|---|---|---|
| Andreas Halvorsen | $350.90M | 1.0% | Add |
| Seth Klarman | $248.22M | 4.9% | New large stake |
| Ken GriffinCALL | $14.27M | — | — |
| Izzy EnglanderPUT | $7.04M | — | — |
| Izzy EnglanderCALL | $4.81M | — | — |
| Ken GriffinPUT | $2.71M | — | — |
| Steven CohenCALL | $776.3K | — | — |
| Steven CohenPUT | $320.9K | — | — |