BAUPOST GROUP LLC/MA: AON PLC REGISTERED SHS CL A (AON): Quarterly 13F Position History
As of Q2 2026, BAUPOST GROUP LLC/MA reported 687,000 shares of AON PLC REGISTERED SHS CL A (AON), worth $227.9M and representing 4.2% of its 13F equity book. Quarter-over-quarter share count change: 82,000 (-10.7%) . The position first appeared in Q1 2026 and has been disclosed across 2 13F-HR filings in Pactolio's tracked window.
- 687,000Shares Held (Latest Filing)
- $227.9MReported Market Value (Latest Filing)
- 4.2%Portfolio Weight (% of 13F Equity Book)
- 82,000Quarter-over-Quarter Share Change
- -$20.3MQuarter-over-Quarter Value Change
- 769,000Peak Reported Shares (Historical)
Recent initiation: BAUPOST GROUP LLC/MA first reported AON on the Q1 2026 filing, so fewer than three quarters of history are available.
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 2 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q2 2026 | 687,000 | 82,000 | -10.7% | $227.9M | 4.2% | $331.7 |
| Q1 2026 | 769,000 | – | – | $248.2M | 4.9% | $322.8 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares, a quarter-end mark rather than the manager's cost basis. See the full methodology document for the normalization rules.
When did BAUPOST GROUP LLC/MA first disclose a AON position in 13F-HR filings?
BAUPOST GROUP LLC/MA first reported AON PLC REGISTERED SHS CL A (AON) on its 13F-HR filing for the period ending 2026-03-31 (Q1 2026). The position has appeared on 2 reported quarters within Pactolio's tracked window.
What was BAUPOST GROUP LLC/MA's most recent quarter-over-quarter share-count change in AON?
Between Q1 2026 and Q2 2026, BAUPOST GROUP LLC/MA reduced its AON position by 82,000 shares (-10.7%), leaving 687,000 shares at a market value of $227.9M.
Does the implied price-per-share represent BAUPOST GROUP LLC/MA's cost basis in AON?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.