Sirios Capital Management L P
Sirios Capital Management, L.P. is a hedge fund and investment adviser headquartered in Boston, Massachusetts. Founded in 1999, the firm specializes in managing equity-oriented investment strategies, primarily for institutional clients such as pension funds, endowments, foundations, and high-net-worth individuals. Sirios operates with a lean team of investment professionals and support staff, focused on delivering risk-adjusted returns for its clients through fundamental research-driven approaches.
Investment Strategy
Sirios Capital Management invests primarily in U.S. equities employing a long/short strategy with an emphasis on fundamental research and company-specific analysis. Their philosophy centers around identifying mispriced securities and constructing a diversified portfolio designed to manage risk and provide consistent, positive returns across market cycles. The firm relies on a collaborative investment process, integrating macroeconomic analysis with bottom-up stock picking.
Latest 13F Filing Activity
Sirios Capital Management L P filed their most recent 13F report on Jun 30, 2025 disclosing 59 equity positions with a total 13F market value of $690M. The fund increased holdings in Ge Vernova Inc., Taiwan Semiconductor MFG LTD, Carrier Global Corporation among other positions. Sirios Capital Management L P reduced exposure to Becton Dickinson & Co., Tenet Healthcare Corp., Hca Healthcare Inc. among others.
Top Holdings
Equity Positions (59)
| Ticker | Security | Weight | Market Value | Shares | Avg Cost | Price | Change (QoQ) |
|---|---|---|---|---|---|---|---|
G GEV | GE VERNOVA INC | 13.82% | $95.3M | 180,183 | $195.81 | $529.15 | +$33.5M |
T TSM | TAIWAN SEMICONDUCTOR MFG LTD | 9.90% | $68.3M | 301,500 | $151.53 | $226.49 | +$22.7M |
A ALC | ALCON AG (NYS) | 4.75% | $32.7M | 370,882 | $82.35 | $88.28 | -$3.0M |
W WFC | WELLS FARGO CO NEW | 4.66% | $32.1M | 400,842 | $67.30 | $80.12 | +$9.7M |
G GMED | GLOBUS MED INC | 4.41% | $30.4M | 515,642 | $57.30 | $59.02 | -$2.8M |
Industry Allocation
Investment Team (6)
| Name | Role | Location | |
|---|---|---|---|
J John Brennan | Principal | Boston, MA , United States | |
K Kristin Foley | Head of Trading | Boston, MA , United States | |
T Todd Kiernan | Trader | MA , United States | |
 | Co-Chief Investment Officer and Portfolio Manager and Principal | Boston, MA , United States | |
R Rishi Kothari | Principal | Newton Centre, MA , United States | |
 | Principal | Boston, MA , United States |