Stephen Mandel's Lone Pine Capital reported 13.3M shares of ON HOLDING AG, CL-A (ONON) for the first time in 2026 Q2, according to the 13F-HR filed with the SEC on August 14, 2026. At quarter-end prices the stake was worth about $470.4M, or 2.88% of the reported portfolio. ONON enters the book as the 21st largest of 34 stock positions.
What did the 2026 Q2 filing report for ONON?
As of June 30, 2026, from the 13F-HR filed August 14, 2026.
| Value | |
|---|---|
| Shares | 13.3M |
| Reported value | $470.4M |
| Portfolio weight | 2.88% |
| Rank in portfolio | 21st of 34 |
How big is the new ONON position?
Stephen Mandel opened 13 stock positions in 2026 Q2; ONON is the 8th largest of them by weight. An average stock position in the Stephen Mandel portfolio is 3% of the reported value, so the new name starts at about the fund's typical size.
Where does ONON sit in the Stephen Mandel portfolio?
ONON ranks 21st of 34 stock positions in the Stephen Mandel portfolio at 2.88%, about the fund's average stock position of 3%. The largest stock position is NBIS at 7.19%. Next come ASML at 6.92% and STX at 5.9%. The three largest stocks together are 20.01% of the book. The ONON purchase was the 18th largest of the quarter's 49 position changes by percent change to portfolio. Across the 2026 Q2 portfolio, Stephen Mandel reported 34 stock positions, with 13 opened and 15 closed. The total portfolio value is about $16.4B, up 30% from the prior quarter.
Has Stephen Mandel held ONON before?
Stephen Mandel has not reported ONON before in the filings we track. Our data starts with the quarter ended June 30, 2013.
Did other funds buy or sell ONON in 2026 Q2?
Among the other tracked funds that had filed for 2026 Q2 as of August 14, 2026, 2 hold ONON. The largest seller was Polen Capital Management. Every tracked holder of ONON is on the ONON ownership page.
FAQ
How many ONON shares does Stephen Mandel hold?
Stephen Mandel holds 13.3M shares of ONON as of June 30, 2026, worth about $470.4M.
What is ONON's weight in the Stephen Mandel portfolio?
ONON is 2.88% of the Stephen Mandel portfolio and ranks 21st of 34 stocks by weight.
Has Stephen Mandel owned ONON before?
No. Stephen Mandel has not reported ONON before in the filings we track, which start with the quarter ended June 30, 2013.
How many other tracked funds hold ONON?
2 other tracked funds that had filed for 2026 Q2 hold ONON.