Investment adviser · CRD 160923

ONEX PARTNERS MANAGER LP

Investment adviser filing (IA)

TORONTO, Canada · Form ADV filed Aug 27, 2026

Regulatory AUM: $22.5B
Client accounts: 35
Employees: 180
Advisory professionals: 39

Who they report serving

Form ADV · Item 5.D

Client types and their share of reported regulatory assets.

Client type	Clients	Regulatory assets	Share of AUM
Pooled investment vehicles	35	$22,473,000,000	100.0%

Filing source

Form ADV 2128713 · Aug 27, 2026 · Item 5.D

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

Private funds & service providers

50+ Private funds

The count excludes feeder funds. Funds in the latest filing appear first, ordered by reported gross assets. Earlier funds retain their last reported values.

Browse the first 49 funds across 7 pages.

ONEX PARTNERS V-B LPPrivate Equity Fund · Last reported Aug 27, 2026$6.58BGross asset value

Form D fundraising filings

Onex Partners V-B LP

Fund administrator VISTRA FUND SERVICES (CANADA) INC. TORONTO, Canada Investor statements: Yes (provided to all investors) Related to adviser: No

Auditor PRICEWATERHOUSECOOPERS GRAND CAYMAN, Cayman Islands

Custodian BANK OF AMERICA MERRILL LYNCH CHARLOTTE, North Carolina, United States Related to adviser: No

Custodian JP MORGAN CHASE BANK NA NEW YORK, New York, United States Related to adviser: No

Custodian MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED NEW YORK, New York, United States Related to adviser: No

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: Yes
External marketing: No

PRICEWATERHOUSECOOPERS
PCAOB 1266

BANK OF AMERICA MERRILL LYNCH
LEI B4TYDEB6GKMZO031MB27

JP MORGAN CHASE BANK NA
LEI 7H6GLXDRUGQFU57RNE97

MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
SEC 8-7221

Fund details & source

Fund ID: 805-6404196991
Reported beneficial owners: 18
Minimum commitment: $10M
Form D file number: 021-290572

Form ADV 2128713 · Aug 27, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

ONEX PARTNERS V LPPrivate Equity Fund · Last reported Aug 27, 2026$4.05BGross asset value

Form D fundraising filings

Onex Partners V LP

Fund administrator VISTRA FUND SERVICES (CANADA) INC. TORONTO, Canada Investor statements: Yes (provided to all investors) Related to adviser: No

Auditor PRICEWATERHOUSECOOPERS GRAND CAYMAN, Cayman Islands

Custodian BANK OF AMERICA MERRILL LYNCH CHARLOTTE, North Carolina, United States Related to adviser: No

Custodian JP MORGAN CHASE BANK NA NEW YORK, New York, United States Related to adviser: No

Custodian MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED NEW YORK, New York, United States Related to adviser: No

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: Yes
External marketing: No

PRICEWATERHOUSECOOPERS
PCAOB 1266

BANK OF AMERICA MERRILL LYNCH
LEI B4TYDEB6GKMZO031MB27

JP MORGAN CHASE BANK NA
LEI 7H6GLXDRUGQFU57RNE97

MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
SEC 8-7221

Fund details & source

Fund ID: 805-9088735436
Reported beneficial owners: 71
Minimum commitment: $10M
Form D file number: 021-290571

Form ADV 2128713 · Aug 27, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

ONEX PARTNERS IV LPPrivate Equity Fund · Last reported Aug 27, 2026$1.88BGross asset value

Form D fundraising filings

ONEX PARTNERS IV LP

Fund administrator VISTRA FUND SERVICES (CANADA) INC. TORONTO, Canada Investor statements: Yes (provided to all investors) Related to adviser: No

Auditor PRICEWATERHOUSECOOPERS GRAND CAYMAN, Cayman Islands

Custodian JP MORGAN CHASE BANK NA NEW YORK, New York, United States Related to adviser: No

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: Yes
External marketing: No

PRICEWATERHOUSECOOPERS
PCAOB 1266

JP MORGAN CHASE BANK NA
LEI 7H6GLXDRUGQFU57RNE97

Fund details & source

Fund ID: 805-8594825344
Reported beneficial owners: 84
Minimum commitment: $10M
Form D file number: 021-207482

Form ADV 2128713 · Aug 27, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

ONEX PARTNERS RANGER CV LPPrivate Equity Fund · Last reported Aug 27, 2026$1.53BGross asset value

Fund administrator GEN II FUND SERVICES, LLC NEW YORK, New York, United States Investor statements: Yes (provided to all investors) Related to adviser: No

Auditor COHNREZNICK LLP NEW YORK, New York, United States

Custodian JP MORGAN CHASE BANK NA NEW YORK, New York, United States Related to adviser: No

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: Yes
External marketing: No

COHNREZNICK LLP
PCAOB 596

JP MORGAN CHASE BANK NA
LEI 7H6GLXDRUGQFU57RNE97

Fund details & source

Fund ID: 805-3996964926
Reported beneficial owners: 16
Minimum commitment: $0
Form D file number: 021-487950

Form ADV 2128713 · Aug 27, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

ONEX FOX CO-INVEST LPPrivate Equity Fund · Last reported Aug 27, 2026$1.3BGross asset value

Form D fundraising filings

Onex Fox Co-Invest LP

Fund administrator VISTRA FUND SERVICES (CANADA) INC. TORONTO, Canada Investor statements: Yes (provided to all investors) Related to adviser: No

Auditor PRICEWATERHOUSECOOPERS GRAND CAYMAN, Cayman Islands

Custodian BANK OF AMERICA MERRILL LYNCH CHARLOTTE, North Carolina, United States Related to adviser: No

Custodian JP MORGAN CHASE BANK NA NEW YORK, New York, United States Related to adviser: No

Custodian MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED NEW YORK, New York, United States Related to adviser: No

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: Yes
External marketing: No

PRICEWATERHOUSECOOPERS
PCAOB 1266

BANK OF AMERICA MERRILL LYNCH
LEI B4TYDEB6GKMZO031MB27

JP MORGAN CHASE BANK NA
LEI 7H6GLXDRUGQFU57RNE97

MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
SEC 8-7221

Fund details & source

Fund ID: 805-7203692869
Reported beneficial owners: 19
Minimum commitment: $0
Form D file number: 021-335441

Form ADV 2128713 · Aug 27, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

ONEX FOX LPPrivate Equity Fund · Last reported Aug 27, 2026$1.2BGross asset value

Form D fundraising filings

Onex Fox LP

Fund administrator VISTRA FUND SERVICES (CANADA) INC. TORONTO, Canada Investor statements: Yes (provided to all investors) Related to adviser: No

Auditor PRICEWATERHOUSECOOPERS GRAND CAYMAN, Cayman Islands

Custodian BANK OF AMERICA MERRILL LYNCH CHARLOTTE, North Carolina, United States Related to adviser: No

Custodian JP MORGAN CHASE BANK NA NEW YORK, New York, United States Related to adviser: No

Custodian MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED NEW YORK, New York, United States Related to adviser: No

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: Yes
External marketing: No

PRICEWATERHOUSECOOPERS
PCAOB 1266

BANK OF AMERICA MERRILL LYNCH
LEI B4TYDEB6GKMZO031MB27

JP MORGAN CHASE BANK NA
LEI 7H6GLXDRUGQFU57RNE97

MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
SEC 8-7221

Fund details & source

Fund ID: 805-6741934154
Reported beneficial owners: 18
Minimum commitment: $0
Form D file number: 021-335440

Form ADV 2128713 · Aug 27, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

ONEX PARTNERS OPPORTUNITIES FUND LPPrivate Equity Fund · Last reported Aug 27, 2026$1.16BGross asset value

Form D fundraising filings

Onex Partners Opportunities Fund LP

Fund administrator GEN II FUND SERVICES, LLC NEW YORK, New York, United States Investor statements: Yes (provided to all investors) Related to adviser: No

Auditor PRICEWATERHOUSECOOPERS GRAND CAYMAN, Cayman Islands

Custodian BANK OF AMERICA MERRILL LYNCH CHARLOTTE, North Carolina, United States Related to adviser: No

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: Yes
External marketing: No

PRICEWATERHOUSECOOPERS
PCAOB 1266

BANK OF AMERICA MERRILL LYNCH
LEI B4TYDEB6GKMZO031MB27

Fund details & source

Fund ID: 805-2986919643
Reported beneficial owners: 99
Minimum commitment: $10M
Form D file number: 021-505946

Form ADV 2128713 · Aug 27, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

Services & filing details

Most recent filing: Aug 27, 2026. View historical filings

Reported services

Pooled investment vehicle management

Compensation

Percentage of assets · Performance-based

Principal office

161 BAY STREET, 49TH FLOOR
TORONTO, M5J 2S1, Canada

CRD 160923

Filing source

Form ADV 2128713 · Aug 27, 2026 · Items 1 & 5

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.