Sirios Capital Management

Hedge Fund SEC-registered adviser

Legal name: Sirios Capital Management, L.P.

Boston, MA Website

AUM

$937.5M
Regulatory AUM

Private funds

3
Hedge Fund 3

Private fund assets

$690.7M
Gross asset value

Employees

15

Last Form D raise

Feb 2026
Most recent fund filing

From SEC Form ADV filing (filed Sep 16, 2026). View on SEC

People(3)

Owners and executive officers named on the firm's SEC Form ADV.

D
David Antonelli
Trustee, John F. Brennan, Jr. Trust of January 1996, U/D/T Dated January 12, 1996, AS Amended June 16, 2026
Source: SEC Form ADV
D
Deborah Brennan
Trustee, John F. Brennan, Jr. Trust of January 1996, U/D/T Dated January 12, 1996, AS Amended June 16, 2026
Source: SEC Form ADV
J
John Brennan III
Managing Director of Sirios Capital Management, L.P.
Source: SEC Form ADV

Funds(3)

Private funds reported on Form ADV, with amounts raised from the funds' SEC Form D filings.

FundTypeGross assetsRaised (Form D)InvestorsLast Form DRecency
Sirios Capital Partners II, L.P.Hedge Fund$369.3M$1.2B146Feb 2026Warm
Sirios Overseas Fund, LTD.Hedge Fund$250.4M$2.0B117Feb 2026Warm
Sirios Focus Partners, L.P.Hedge Fund$71.0M$455.8M54Feb 2026Warm

Board seats

Companies whose SEC Form D filings name one of this firm's people as a director, matched by name and office ZIP code.

No board seats matched from SEC filings yet.

Regulatory identifiers

CRD number
160580
SEC file number
801-73570
CIK
1104883

Sources