Private company

Onex Corporation

Logo: Onex, Public domain, via Wikimedia Commons⁵

Canadian investment company

Onex Corporation is a Canadian investment management firm founded by Gerry Schwartz in 1984. In November 2022, it had CAD $47 billion dollars under management.³ Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1983Founded¹

Industryprivate equity¹
HeadquartersToronto¹
Websitewww.onex.com
Legal formholding company¹
Listed onToronto Stock Exchange¹
Incorporated inOntario, Canada⁶
Business address161 Bay Street, Suite 4900, Toronto, M5J 1C4⁶
LEI894500LB8PNE5C7CEN88⁴
StatusActive⁴
LEI statusIssued and current⁴
Registered address161 Bay Street, 4900, M5J 2S1 Toronto, Canada⁴
Registered withMinistry of Government and Consumer Services, 465789⁴

See how the biggest companies compare on our leaderboards

Onex Corporation is a Canadian investment management firm founded by Gerry Schwartz in 1984. In November 2022, it had CAD $47 billion dollars under management.³

Corporate structure

Onex Corporation sits at the top of its group. 47 entities, 8 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

Onex Corporation Toronto, Ontario, Canada
- OMI PH USD CP LLC 100% · New York, New York, United States
- MERRITHEW INTERNATIONAL INC. Toronto, Ontario, Canada
- ONEX CREDIT ADVISOR, LLC Englewood Cliffs, New Jersey, United States
- WIZARD MANAGEMENT I GMBH & CO. KG München, Germany
- WIZARD MANAGEMENT II GMBH & CO. KG Munich, Germany
- Allison Transmission Subsidiary · Indianapolis, Indiana, United States
  - ALLISON TRANSMISSION INDIA PRIVATE LIMITED Subsidiary · Kancheepuram, India
- Carestream Health Subsidiary · Dover, Delaware, United States
- Celestica Subsidiary · Toronto, Ontario, Canada
  - Celestica (USA) Inc., a Subsidiary · Delaware, United States
  - CELESTICA INTERNATIONAL LP Subsidiary · Toronto, Ontario, Canada
- Hawker Beechcraft Subsidiary · Kansas
  - Beechcraft Subsidiary · Wilmington, Delaware, United States
- Parkdean Resorts Subsidiary · Newcastle upon Tyne
- SIG Combibloc GmbH Subsidiary · Linnich, Germany
  - SIG COMBIBLOC FZCO Subsidiary · Dubai, United Arab Emirates
- Spirit AeroSystems Subsidiary · Wichita, Kansas, United States
- Tomkins plc Subsidiary · London
- ATI Physical Therapy, Inc. Stake · Downers Grove, Illinois
- CLARIVATE PLC Stake · Y9
- Emerald Holding, Inc. Stake · Wesbrook, Maine, United States
- Jeld-Wen Stake · Charlotte, North Carolina, United States
- Onex Direct Lending BDC Fund Stake · Englewood Cliffs, New Jersey
- POWERSCHOOL HOLDINGS, INC. Stake · Folsom, California
- RYAN SPECIALTY HOLDINGS, INC. Stake · Chicago, Illinois, United States
- Blitz 24-120 GmbH Subsidiary · Munich, Germany
- ONCAP IV Select LP Subsidiary · Toronto, Ontario, Canada
- ONEX FALCON PRIVATE CREDIT OPPORTUNITIES VII HOLDINGS, LP Subsidiary · Boston, Massachusetts, United States
- ONEX FALCON PRIVATE CREDIT OPPORTUNITIES VII, LP Subsidiary · Boston, Massachusetts, United States
- Onex Parallel (ONCAP) III LP Subsidiary · Toronto, Ontario, Canada
- and 9 more

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries listed in Exhibit 21 of annual reports filed with the SEC; subsidiaries, stakes and holdings from Wikidata (CC0); stakes of 5% or more it reported on Schedules 13D and 13G (8 companies). Each entity in the chart links to its source.

What it owns

What Onex Corporation reports owning in its annual reports to the SEC: buildings, land and equipment, real estate and locations, investments, intangible assets and inventory, at the end of its latest fiscal year and a year before.

Stakes and holdings (Wikidata)

Things Wikidata records the company as owning, with the share when stated.¹

The story

Founded by Gerry Schwartz in 1983.¹

Schwartz founded Onex in 1984 and took the company public in 1987.

In June 2007, General Motors sold Allison Transmission to financial investors Carlyle Group and Onex Corporation.

In 2010, Onex and the Canada Pension Plan acquired English engineering firm Tomkins, though Onex only held 14% of shares.

At the end of 2017, Onex acquired SMG. The company was sold off in 2019 to merge with AEG Facilities to form ASM Global.

In 2019, Onex acquired Gluskin Sheff, a Toronto-based wealth management firm.

In December 2019, Onex purchased Canada's second-largest airline WestJet for CA$5.0 billion (equivalent to $6 billion in 2025).

In May 2020, Onex blamed a first-quarter net loss of $1.1 billion US dollars on the COVID-19 pandemic.

Founder Schwartz stepped down as CEO in May 2022 and was replaced by Bobby Le Blanc.

From Wikipedia’s article on Onex Corporation, shared under CC BY-SA 4.0.⁷

Leadership

Who has led Onex Corporation, and when. Pick a name to see everywhere that person has worked.

FounderGerry Schwartz¹

Products and brands

private equity fund

Listed on Wikidata.¹

Subsidiaries and ownership

Subsidiaries

Also owns

Subsidiaries (GLEIF)

Also consolidated

From Wikidata.¹ Ownership links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); each one cites its LEI record.

Acquisitions

Oct 2016Acquired Save-A-Lot¹

Timeline

1983Founded Founded¹

Stakes it holds

Onex Corporation has told the SEC it owns more than 5% of 8 companies, latest first (Schedules 13D and 13G).

Emerald Holding, Inc.SCHEDULE 13D/A Jan 2, 2024 to Jul 14, 2026¹⁴
Onex Direct Lending BDC FundSCHEDULE 13D/A Jan 25, 2024 to Feb 10, 2026¹⁵
POWERSCHOOL HOLDINGS, INC.SC 13G/A Feb 8, 2022 to Oct 10, 2024¹⁶
RYAN SPECIALTY HOLDINGS, INC.SC 13D/A May 24, 2023 to Mar 14, 2024¹⁷
CelesticaSC 13G/A Jan 12, 2024¹⁸
ATI Physical Therapy, Inc.SC 13D Jun 26, 2023¹⁹
CLARIVATE PLCSC 13G/A Feb 10, 2022²⁰
Jeld-WenSC 13G/A Jan 27, 2022²¹

SEC filer profile

How Onex Corporation is registered with the Securities and Exchange Commission, from its EDGAR record and the cover page of its latest annual report.

Name on EDGARONEX CORP²
CIK0000937226
Incorporated inOntario, Canada²
Fiscal year endsDecember 31²
Business address161 Bay Street, Suite 4900, Toronto, M5J 1C4, Ontario, Canada²
Phone212-582-2211²
On EDGAR sinceSep 13, 1996²
Filings216 in all: 4 (79), SC 13G/A (44), SC 13D/A (29), 3 (20), SC 13G (17), 3/A (8), SC 13D (7), 4/A (4)²
All 12 form types
SCHEDULE 13D/A (4), SC 14D1/A (2), DFAN14A (1), SC 14D1 (1)

Sources

The numbers on this page point here. Each one links to the record it came from.

1
WikidataOnex Corporation on Wikidata
2
SEC EDGAROnex Corporation filings on SEC EDGAR
3
WikipediaOnex Corporation on Wikipedia
4
GLEIFOnex Corporation LEI record (894500LB8PNE5C7CEN88)
5
Wikimedia CommonsOnex Corporation logo by Onex, Public domain
6
SEC EDGAROnex Corporation filings on SEC EDGAR
7
WikipediaOnex Corporation on Wikipedia (revision used)
8
GLEIFMERRITHEW INTERNATIONAL INC.: LEI record
9
GLEIFOMI PH USD CP LLC: LEI record
10
GLEIFONEX CREDIT ADVISOR, LLC: LEI record
11
GLEIFGLUSKIN SHEFF + ASSOCIATES (US) INC.: LEI record
12
GLEIFWIZARD MANAGEMENT I GMBH & CO. KG: LEI record
13
GLEIFWIZARD MANAGEMENT II GMBH & CO. KG: LEI record
14
SEC EDGAROnex Corporation SCHEDULE 13D/A on Emerald Holding, Inc.
15
SEC EDGAROnex Corporation SCHEDULE 13D/A on Onex Direct Lending BDC Fund
16
SEC EDGAROnex Corporation SC 13G/A on POWERSCHOOL HOLDINGS, INC.
17
SEC EDGAROnex Corporation SC 13D/A on RYAN SPECIALTY HOLDINGS, INC.
18
SEC EDGAROnex Corporation SC 13G/A on Celestica
19
SEC EDGAROnex Corporation SC 13D on ATI Physical Therapy, Inc.
20
SEC EDGAROnex Corporation SC 13G/A on CLARIVATE PLC
21
SEC EDGAROnex Corporation SC 13G/A on Jeld-Wen