Onex Partners Manager LP
● SEC registered since 2012CRD 160923SEC# 801-74110Toronto
Ranks #522 of 6,030 private fund managers by regulatory AUM.
Reg. AUM
$22.47B
Fund GAV
$22.61B
Private funds
35
Employees
180
Accounts
35
Location
Toronto
Onex Partners Manager LP assets under management
Onex Partners Manager LP is a registered investment adviser overseen by the SEC based in Toronto. The firm has been registered since 2012. It reports $22.5 billion in regulatory assets under management and employs 180 people. Onex Partners Manager LP manages 35 private funds with combined gross assets of $22.6 billion, including Onex Partners V-B LP. By regulatory assets, it ranks 522 of 6,030 private fund managers.
Onex Partners Manager LP private funds
35 funds · $22.61B GAV| Fund | Type | Gross assets | Min. |
|---|---|---|---|
| Onex Partners V-B LP | Private Equity | $6.58B | $10M |
| Onex Partners V LP | Private Equity | $4.05B | $10M |
| Onex Partners IV LP | Private Equity | $1.88B | $10M |
| Onex Partners Ranger CV LP | Private Equity | $1.53B | — |
| Onex Fox Co-Invest LP | Private Equity | $1.3B | — |
| Onex Fox LP | Private Equity | $1.2B | — |
| Onex Partners Opportunities Fund LP | Private Equity | $1.16B | $10M |
| Onex Partners III LP | Private Equity | $790.5M | $10M |
| Onex Fox II LP | Private Equity | $741.9M | — |
| Onex Partners V Pv LP | Private Equity | $605M | $10M |
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Join to unlock · $37/moOnex Partners Manager LP owners & executives
15 reported| Name | Title | Ownership | Since |
|---|---|---|---|
| Amir Hossein Motamedi Control | Director (onex Partners Manager Gp Ulc) | Under 5% | 2025 |
| Matthew Brian Murphy | Chief Compliance Officer & General Counsel | Under 5% | 2025 |
| Omi Management U.S. Limited Partnership Control | Limited Partner Of Onex Partners Manager Lp | Over 75% | 2003 |
| Onex Partners Manager GP Ulc Control | General Partner Of Onex Partners Manager Lp | Under 5% | 2003 |
| Popatia Nmn Tawfiq Control | Head Of Onex Partners | Under 5% | 2025 |
| Zachary C Levitt Control | Director (onex Partners Manager Gp Ulc) | Under 5% | 2026 |
| 1381280 Ontario Inc. Control | General Partner | — | 1999 |
| Omi Holdings GP LLC Control | General Partner | — | 2023 |
| Omi Holdings LP Control | Shareholder | Over 75% | 2023 |
| Omi Holdings LP | Limited Partner | Over 75% | 2023 |
See all 15 owners & executives — unlock the full record.
Join to unlock · $37/moFrequently asked questions
How much does Onex Partners Manager LP manage?
Onex Partners Manager LP reports $22.5 billion in regulatory assets under management on its Form ADV.
How many private funds does Onex Partners Manager LP manage?
Onex Partners Manager LP manages 35 private funds with combined gross assets of $22.6 billion.
How many employees does Onex Partners Manager LP have?
Onex Partners Manager LP reports 180 employees.
Where is Onex Partners Manager LP located?
Onex Partners Manager LP is based in Toronto and has been SEC-registered since 2012.
Does Onex Partners Manager LP disclose fund performance?
Onex Partners Manager LP is not required to publicly disclose fund returns. Form ADV filings include assets, ownership, and service providers, shown above.
Contact & registration
| Address | 161 Bay Street, 49th Floor, Toronto M5J 2S1 |
| Phone | 416-362-7711 |
| Office hours | 9a.m. To 5p.m. |
| SEC region | HQ |
| Discloses disciplinary history | No |
Regulatory AUM
$22.47B▲ 9%
Mar '25Form ADV, monthlyJul '26
How this firm compares
Regulatory AUMTop 5%
Larger than 95% of 16,306 advisers
AUM vs fund managersTop 9%
Larger than 91% of 6,030 private-fund managers
Number of fundsTop 6%
More funds than 94% of fund managers
EmployeesTop 4%
More than 96% of 16,824 advisers
Assets under management
$22.47Bregulatory AUM
Discretionary $22.47B
Service providers
Auditor
Custodian
Administrator