Seth Klarman's Baupost Group reported 619K shares of CME Group Inc (CME) for the first time in 2026 Q2, according to the 13F-HR filed with the SEC on August 13, 2026. At quarter-end prices the stake was worth about $136.7M, or 2.52% of the reported portfolio. CME enters the book as the 14th largest of 23 stock positions.
What did the 2026 Q2 filing report for CME?
As of June 30, 2026, from the 13F-HR filed August 13, 2026.
| Value | |
|---|---|
| Shares | 619K |
| Reported value | $136.7M |
| Portfolio weight | 2.52% |
| Rank in portfolio | 14th of 23 |
How big is the new CME position?
Seth Klarman opened 3 stock positions in 2026 Q2; CME is the largest of them by weight. An average stock position in the Seth Klarman portfolio is 4% of the reported value, so the new name starts below the fund's typical size.
Where does CME sit in the Seth Klarman portfolio?
CME ranks 14th of 23 stock positions in the Seth Klarman portfolio at 2.52%, below the fund's average stock position of 4%. The CME purchase was the 5th largest of the quarter's 20 position changes by percent change to portfolio. The largest stock position is AMZN at 16.48%. Next come ELV at 9.11% and QSR at 9.04%. The three largest stocks together are 34.62% of the book. Across the 2026 Q2 portfolio, Seth Klarman reported 23 stock positions, with 3 opened and 2 closed. The total portfolio value is about $5.4B, up 6% from the prior quarter.
Has Seth Klarman held CME before?
Seth Klarman has not reported CME before in the filings we track. Our data starts with the quarter ended June 30, 2013.
Did other funds buy or sell CME in 2026 Q2?
Among the other tracked funds that had filed for 2026 Q2 as of August 13, 2026, 6 hold CME. Of those, 2 opened it this quarter. One other tracked fund sold out of it. The largest buyers of CME this quarter were Lewis Sanders, Mairs & Power Growth Fund and Ole Andreas Halvorsen. The largest sellers were William Von Mueffling, John Armitage and Parnassus Endeavor Fund. Every tracked holder of CME is on the CME ownership page.
FAQ
How many CME shares does Seth Klarman hold?
Seth Klarman holds 619K shares of CME as of June 30, 2026, worth about $136.7M.
What is CME's weight in the Seth Klarman portfolio?
CME is 2.52% of the Seth Klarman portfolio and ranks 14th of 23 stocks by weight.
Has Seth Klarman owned CME before?
No. Seth Klarman has not reported CME before in the filings we track, which start with the quarter ended June 30, 2013.
How many other tracked funds hold CME?
6 other tracked funds that had filed for 2026 Q2 hold CME. 2 of them opened it this quarter.