# Sirios Capital Management, L.P.

> Sirios Capital Management, L.P. is an SEC-registered investment advisory firm in Boston, MA, registered since 2012, reporting $500 million to $1 billion in regulatory assets under management in its Form ADV filing dated September 16, 2026.

- CRD: 160580
- Filed as: SIRIOS CAPITAL MANAGEMENT, L.P.
- Registration: SEC-registered investment adviser (status as filed: Approved)
- Location: Boston, MA
- Filing period: October 2026
- Form ADV filing dated: September 16, 2026
- SEC record (IAPD): https://adviserinfo.sec.gov/firm/summary/160580
- AdvisorCensus page: https://advisorcensus.com/firm/sirios-capital-management-l-p-boston-ma-160580

## Quick answers

**How is Sirios Capital Management, L.P. compensated?**
On its Form ADV (Item 5.E, October 2026), Sirios Capital Management, L.P. reports these compensation arrangements: a percentage of assets under its management; performance-based fees.

**Where is Sirios Capital Management, L.P. located?**
Sirios Capital Management, L.P.'s principal office is in Boston, MA, according to its Form ADV.

**Is Sirios Capital Management, L.P. registered with the SEC or a state?**
Sirios Capital Management, L.P. is an SEC-registered investment advisory firm, registered since 2012. Status as filed: Approved. CRD 160580.

**How much does Sirios Capital Management, L.P. manage?**
Sirios Capital Management, L.P. reports $937,452,708 in regulatory assets under management in its Form ADV filing dated September 16, 2026 (100% discretionary).

**How have Sirios Capital Management, L.P.'s assets and staff changed since 2021?**
In the Form ADV data for Sirios Capital Management, L.P.: Regulatory assets under management: $1,583,275,579 in the October 2021 data and $937,452,708 in the October 2026 data, down 41%. Total employees: 20 in October 2021 and 15 in October 2026. Assets under management move with markets as well as with clients coming and going.

**What types of clients does Sirios Capital Management, L.P. serve?**
By number of clients on Form ADV Item 5.D: pooled investment vehicles (other than investment companies and business development companies) (5).

**Does Sirios Capital Management, L.P. report any disciplinary disclosures?**
Reports no disclosure items on Form ADV Item 11. The detail of any item is on the firm's SEC record: https://adviserinfo.sec.gov/firm/summary/160580

**What changed in Sirios Capital Management, L.P.'s recent Form ADV filings?**
In the October 2026 filing data: Updated its list of owners and control persons (Schedule A).

## From the Form ADV filing

### Compensation (Item 5.E)
- A percentage of assets under your management
- Performance-based fees

### Regulatory assets under management (Item 5.F)
- Total: $937,452,708
- Discretionary: $937,452,708
- Non-discretionary: $0

### Clients (Item 5.D)

| Client type | Clients | Assets |
| --- | --- | --- |
| Pooled investment vehicles (other than investment companies and business development companies) | 5 | $937,452,708 |

### Advisory services (Item 5.G)
- Portfolio management for pooled investment vehicles (other than investment companies)

### Firm details
- Registered since: 2012 (14 years)
- Employees: 15 total, 10 performing advisory functions
- Wrap fee program participation: No
- States registered or notice-filed: MA
- Disclosures (Item 11): Reports no disclosure items on Form ADV Item 11.

### Websites listed on Form ADV (Item 1.I)
- sirioslp.com

## Assets and staff over time

| Data period | Regulatory assets under management | Employees | Filing dated |
| --- | --- | --- | --- |
| October 2021 | $1,583,275,579 | 20 | March 15, 2021 |
| October 2022 | $1,195,834,087 | 16 | March 15, 2022 |
| October 2023 | $893,601,940 | 15 | July 18, 2023 |
| October 2024 | $765,269,630 | 15 | March 28, 2024 |
| October 2025 | $892,484,646 | 15 | March 31, 2025 |
| October 2026 | $937,452,708 | 15 | September 16, 2026 |

Regulatory assets under management: $1,583,275,579 in the October 2021 data and $937,452,708 in the October 2026 data, down 41%.
Total employees: 20 in October 2021 and 15 in October 2026.

## Changes in the filing (last 12 months)

### October 2026
- Updated its list of owners and control persons (Schedule A).

## Source

Form ADV as filed, October 2026. Values appear as filed. Cite as: AdvisorCensus. Sirios Capital Management, L.P. (CRD 160580): Form ADV filing data as of October 2026.