ONEX CORP - 09 May 2026 SCHEDULE 13D/A Report for Emerald Holding, Inc. Common Stock, par value $0.01 per share (EEX)

Filing manager
ONEX CORP
Reporting owner
Onex Corporation
Security
Emerald Holding, Inc. Common Stock, par value $0.01 per share
Beneficially owned shares
184,049,617 shares
Ownership signal CIK-linked ownership evidence from parsed SEC filings. 2 signals
Large-stake signal

Form

SCHEDULE 13D/A

Active or control-oriented beneficial ownership filing.

Ownership

93%

Beneficial ownership of this reported class.

Shares

184,049,617 shares

Shares beneficially owned as disclosed.

Event date

09 May 2026

Date tied to the ownership event or amendment.

Accepted by SEC

11 May 2026

EDGAR acceptance date.

How to read this large-stake filing
  • Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
  • Compare this filing with the holder history and issuer page before treating the percentage as a current position.
  • Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
Class ownership
93%
Subject security Names, identifiers, and filing context for this profile. 2 source fields
Symbol
EEX
Shares outstanding
197,902,814 shares
Source evidence Original filing metadata and source links for verification. 5 source fields
SEC form
SCHEDULE 13D/A
Accepted by SEC
11 May 2026, 20:30:42 UTC
Event date
09 May 2026
Prior SEC filing
31 Mar 2025
Source filing
View source filing

Key filing fact

ONEX CORP disclosed 93% ownership in Emerald Holding, Inc. Common Stock, par value $0.01 per share (EEX) on 09 May 2026.

Key facts

  • ONEX CORP filed SCHEDULE 13D/A for Emerald Holding, Inc. Common Stock, par value $0.01 per share (EEX).
  • Disclosed ownership: 93%.
  • Date of event: 09 May 2026.

Change

  • Previous schedule filing date: 31 Mar 2025.
  • Current filing was accepted on 11 May 2026, 20:30.

Research use

  • This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
  • Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.

Evidence

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

View source filing

Reporting persons

Disclosed reporting parties (17)

Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.

Name Ownership Shares owned Sole voting power Shared voting power Signature Title CIK
Onex Corporation 93% 184,049,617 0 184,049,617 /s/ Colin Sam Colin Sam, Managing Director 0000937226
Gerald W. Schwartz 0.2% 470,583 0 470,583 /s/ Gerald W. Schwartz Gerald W. Schwartz 0001275599
Onex Partners GP Inc. 18% 35,039,404 0 35,039,404 /s/ David Copeland David Copeland, Vice President 0001544360
Onex Partners III GP LP 18% 35,039,404 0 35,039,404 /s/ David Copeland David Copeland, Vice President, By: Onex Partners GP Inc., its General Partner 0001506665
Onex Partners III LP 17% 33,135,329 0 33,135,329 /s/ David Copeland David Copeland, Vice President, By: Onex Partners III GP LP, its General Partner, By: Onex Partners GP Inc., its General Partner 0001435855
Onex Partners III PV LP 0.2% 420,116 0 420,116 /s/ David Copeland David Copeland, Vice President, By: Onex Partners III GP LP, its General Partner, By: Onex Partners GP Inc., its General Partner 0001446974
Onex Partners III Select LP 0.1% 106,562 0 106,562 /s/ David Copeland David Copeland, Vice President, By: Onex Partners III GP LP, its General Partner, By: Onex Partners GP Inc., its General Partner 0001470880
Onex American Holdings GP LLC 0.2% 423,159 0 423,159 /s/ Amir Motamedi Amir Motamedi, Director 0001544361
Onex US Principals LP 0.2% 423,159 0 423,159 /s/ Amir Motamedi Amir Motamedi, Director, By: Onex American Holdings GP LLC, its General Partner 0001297369
Onex Partners Holdings LLC 5.6% 11,125,186 0 11,125,186 /s/ Amir Motamedi Amir Motamedi, Director 0001838066
Onex OP V Holdings SARL 5.6% 11,125,186 0 11,125,186 /s/ Amir Motamedi Amir Motamedi, Type A Manager 0002002606
1597257 Ontario Inc. 0.2% 470,583 0 470,583 /s/ David Copeland David Copeland, Managing Director - Tax 0001517831
New PCo II Investments Ltd. 0.2% 470,583 0 470,583 /s/ Michelle Iskander Michelle Iskander, Secretary 0001593408
Onex Advisor Subco III LLC 0.2% 470,583 0 470,583 /s/ Joel Greenberg Joel Greenberg, Director 0001695911
Onex Partners Canadian GP Inc. 70% 137,461,868 0 137,461,868 /s/ David Copeland David Copeland, Director 0001817206
Onex Partners V GP Limited 70% 137,461,868 0 137,461,868 /s/ David Copeland David Copeland, Director 0001817315
OPV Gem Aggregator LP 70% 137,461,868 0 137,461,868 /s/ David Copeland David Copeland, Director, By: Onex Partners V GP Limited, its General Partner 0001817205
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