Sirios Capital Management, L.P.
● SEC registered since 2012CRD 160580SEC# 801-73570Boston, MA
Ranks #3,079 of 5,974 private fund managers by regulatory AUM.
Reg. AUM
$937.5M
Fund GAV
$690.7M
Private funds
3
Employees
15
Accounts
5
Location
Boston, MA
Sirios Capital Management, L.P. assets under management
Sirios Capital Management, L.P. is an SEC-registered investment adviser based in Boston, MA. The firm has been registered since 2012. It reports $937.5 million in regulatory assets under management and employs 15 people. Sirios Capital Management, L.P. manages 3 private funds with combined gross assets of $690.7 million, including Sirios Capital Partners II, L.P. By regulatory assets, it ranks 3,079 of 5,974 private fund managers.
Sirios Capital Management, L.P. private funds
3 funds · $690.7M GAV| Fund | Type | Gross assets | Min. |
|---|---|---|---|
| Sirios Capital Partners II, L.P. | Hedge | $369.3M | $5M |
| Sirios Overseas Fund, Ltd. | Hedge | $250.4M | $5M |
| Sirios Focus Partners, L.P. | Hedge | $71M | $5M |
Sirios Capital Management, L.P. owners & executives
14 reported| Name | Title | Ownership | Since |
|---|---|---|---|
| Allison M Smyth Control | Chief Financial Officer | Under 5% | 2018 |
| Im Square Holding 3 LLC | Limited Partner | 10-25% | 2018 |
| John F. Brennan, Jr. Trust of January 1996, U/D/T Dated January 12, 1996, As Amended June 16, 2026 Control | Limited Partner | Over 75% | 2026 |
| John Francis Brennan III Control | Managing Director Of Sirios Capital Management, L.p. | Under 5% | 2026 |
| Robert John Fitzpatrick Control | Chief Compliance Officer | Under 5% | 2014 |
| Sirios Associates, L.L.C. Control | General Partner Of Sirios Capital Management, L.p. | Under 5% | 1999 |
| David Alexander Antonelli Control | Trustee | — | 2026 |
| Deborah Lynne Brennan Control | Trustee | — | 2026 |
| Eurazeo SE Control | Parent | Over 75% | 2014 |
| Im Square Partners Holding Control | Holding Company | Over 75% | 2021 |
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Join to unlock · $37/moFrequently asked questions
How much does Sirios Capital Management, L.P. manage?
Sirios Capital Management, L.P. reports $937.5 million in regulatory assets under management on its Form ADV.
How many private funds does Sirios Capital Management, L.P. manage?
Sirios Capital Management, L.P. manages 3 private funds with combined gross assets of $690.7 million.
How many employees does Sirios Capital Management, L.P. have?
Sirios Capital Management, L.P. reports 15 employees.
Where is Sirios Capital Management, L.P. located?
Sirios Capital Management, L.P. is based in Boston, MA and has been SEC-registered since 2012.
Does Sirios Capital Management, L.P. disclose fund performance?
Sirios Capital Management, L.P. is not required to publicly disclose fund returns. Form ADV filings include assets, ownership, and service providers, shown above.
Contact & registration
| Address | One International Place, Boston, MA 02110 |
| Phone | 617-598-5100 |
| Office hours | 9:00 a.m. - 5:00 p.m. |
| SEC region | Boston Regional Office (BRO) |
| CIK | 1104883 |
| Discloses disciplinary history | No |
Regulatory AUM
$937.5M▲ 5%
Mar '25Form ADV, monthlySep '26
How this firm compares
Regulatory AUMTop 34%
Larger than 66% of 16,369 advisers
AUM vs fund managersTop 52%
Larger than 48% of 5,974 private-fund managers
Number of fundsTop 53%
More funds than 47% of fund managers
EmployeesTop 30%
More than 70% of 16,804 advisers
Assets under management
$937.5Mregulatory AUM
Discretionary $937.5M
Service providers
Auditor
Prime broker
Custodian
Administrator