ONEX CORP - 14 Jul 2026 Form 4 Insider Report for Emerald Holding, Inc. (EEX)

Reporting relationship: 10%+ Owner
Issuer ticker: EEX
Reported as of: 14 Jul 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 14 Jul 2026, 18:30:58 UTC
Prior SEC filing: 05 Dec 2025
Source filing: View source filing
Reporting owner signature: Onex Corporation, By: /s/ David Copeland, Managing Director - Tax

Key filing fact

ONEX CORP filed Form 4 for Emerald Holding, Inc. (EEX) on 14 Jul 2026.

Key facts

This page summarizes ONEX CORP's Form 4 filing for Emerald Holding, Inc. (EEX).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 14 Jul 2026, 18:30.

Change

Previous filing in this sequence was filed on 05 Dec 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (10)

CIK 0000937226 Primary reporting owner

ONEX CORP

Relationship: 10%+ Owner
Address: 161 BAY STREET, P.O. BOX 700, TORONTO, ONTARIO, CANADA
Signature: Onex Corporation, By: /s/ David Copeland, Managing Director - Tax
Signature date: 14 Jul 2026

CIK 0001275599

SCHWARTZ GERALD W

Relationship: 10%+ Owner
Address: C/O ONEX CORPORATION, 161 BAY STREET, P.O. BOX 700, TORONTO, ONTARIO, CANADA
Signature: Gerald W. Schwartz, By:/s/ Chris Govan, attorney-in-fact for Gerald W. Schwartz
Signature date: 14 Jul 2026

CIK 0001544360

Onex Partners GP Inc.

Relationship: 10%+ Owner
Address: C/O ONEX CORPORATION, 161 BAY STREET, P.O. BOX 700, TORONTO, ONTARIO, CANADA
Signature: Onex Partners GP Inc., By: /s/ Amir Motamedi, Vice President
Signature date: 14 Jul 2026

CIK 0001506665

Onex Partners III GP LP

Relationship: 10%+ Owner
Address: C/O ONEX CORPORATION, 161 BAY STREET, P.O. BOX 700, TORONTO, ONTARIO, CANADA
Signature: Onex Partners III GP LP, By: Onex Partners GP Inc., its General Partner, By: /s/ Amir Motamedi, Vice President
Signature date: 14 Jul 2026

CIK 0001435855

ONEX PARTNERS III LP

Relationship: 10%+ Owner
Address: C/O ONEX CORPORATION, 161 BAY STREET, P.O. BOX 700, TORONTO, ONTARIO, CANADA
Signature: Onex Partners III LP, By: Onex Partners III GP LP, its General Partner, By: Onex Partners GP Inc., its General Partner, By: /s/Amir Motamedi, Vice President
Signature date: 14 Jul 2026

CIK 0001446974

ONEX PARTNERS III PV LP

Relationship: 10%+ Owner
Address: C/O ONEX CORPORATION, 161 BAY STREET, P.O. BOX 700, TORONTO, ONTARIO, CANADA
Signature: Onex Partners III PV LP, By: Onex Partners III GP LP, its General Partners, By: Onex Partners GP Inc., its General Partner, By: /s/ Amir Motamedi, Vice President
Signature date: 14 Jul 2026

CIK 0001470880

Onex Partners III Select LP

Relationship: 10%+ Owner
Address: C/O ONEX CORPORATION, 161 BAY STREET, P.O. BOX 700, TORONTO, ONTARIO, CANADA
Signature: Onex Partners III Select LP, By: Onex Partners III GP LP, its General Partner, By: Onex Partners GP Inc., its General Partner, By: /s/ Amir Motamedi, Vice President
Signature date: 14 Jul 2026

CIK 0001593408

New PCo II Investments, Ltd.

Relationship: 10%+ Owner
Address: C/O ONEX CORPORATION, 161 BAY STREET, P.O. BOX 700, TORONTO, ONTARIO, CANADA
Signature: New PCo II Investments LTD., By: /s/ Michelle Iskander, Secretary
Signature date: 14 Jul 2026

CIK 0001695911

Onex Advisor Subco III LLC

Relationship: 10%+ Owner
Address: C/O ONEX CORPORATION, 161 BAY STREET, P.O. BOX 700, TORONTO, ONTARIO, CANADA
Signature: Onex Advisor Subco III LLC, By: /s/ Joel Greenberg, Director
Signature date: 14 Jul 2026

CIK 0001517831

1597257 Ontario Inc.

Relationship: 10%+ Owner
Address: C/O ONEX CORPORATION, 161 BAY STREET, P.O. BOX 700, TORONTO, ONTARIO, CANADA
Signature: 1597257 Ontario Inc., By: /s/ Michelle Iskander, Secretary
Signature date: 14 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -184,049,617
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F3, F4, F5

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -184,049,617
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F3, F4, F5

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -184,049,617
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F3, F4, F5

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -184,049,617
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F3, F4, F5

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -184,049,617
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F3, F4, F5

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -184,049,617
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F3, F4, F5

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -184,049,617
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F3, F4, F5

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -184,049,617
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F3, F4, F5

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -184,049,617
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F3, F4, F5

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -184,049,617
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F3, F4, F5

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -470,583
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F4, F5, F6, F7, F8

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -470,583
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F4, F5, F6, F7, F8

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -470,583
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F4, F5, F6, F7, F8

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -470,583
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F4, F5, F6, F7, F8

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -470,583
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F4, F5, F6, F7, F8

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -470,583
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F4, F5, F6, F7, F8

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -470,583
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F4, F5, F6, F7, F8

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -470,583
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F4, F5, F6, F7, F8

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -470,583
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F4, F5, F6, F7, F8

EEX transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -470,583
Change %: -100%
Price
Shares after: 0
Date: 14 Jul 2026
Ownership: See footnotes
Footnotes: F1, F2, F4, F5, F6, F7, F8

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

ONEX CORP is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 8 footnotes

Footnote F1

Pursuant to and in connection with the transactions contemplated by that certain Agreement and Plan of Merger, dated May 9, 2026, entered into by Emerald Holding, Inc., a Delaware corporation (the "Company" or "Emerald"), Emma Buyer, LLC, a Delaware limited liability company ("Parent"), and Emma Merger Sub, Inc., a Delaware corporation and a wholly-owned subsidiary of Parent ("Merger Sub"), on July 14, 2026, Merger Sub merged with and into Emerald, with Emerald surviving the merger and becoming a wholly-owned subsidiary of Parent (such merger, the "Transaction"). Parent and Merger Sub are newly formed holding companies owned by funds managed by affiliates of Apollo Global Management, Inc. ("Apollo").

Footnote F2

(Continued from footnote 1) Each share of common stock, par value $0.01 per share, of Emerald (each, a share of "Emerald Common Stock") issued and outstanding immediately prior to the effective time of the Transaction (the "Effective Time"), other than shares of Emerald Common Stock (i) held by Emerald as treasury stock or owned by Parent or Merger Sub (which were cancelled) or any wholly owned subsidiary of Emerald and Parent (other than Merger Sub), or (ii) as to which appraisal rights were properly exercised in accordance with Delaware law (and not validly withdrawn), was cancelled and converted into the right to receive $5.03 per share of Emerald Common Stock in cash (the "Merger Consideration"), without interest.

Footnote F3

Includes: (i) 33,135,329 shares of Common Stock held of record by Onex Partners III LP, (ii) 1,377,397 shares of Common Stock held of record by Onex Partners III GP LP, (iii) 423,159 shares of Common Stock held of record by Onex US Principals LP, (iv) 420,116 shares of Common Stock held of record by Onex Partners III PV LP, (v) 11,125,186 shares of Common Stock held of record by Onex OP V Holdings SARL, (vi) 106,562 shares of Common Stock held of record by Onex Partners III Select LP and 137,461,868 shares of Common Stock held of record by OPV Gem Aggregator LP.

Footnote F4

Onex Corporation, a corporation whose subordinated voting shares are traded on the Toronto Stock Exchange, may be deemed to beneficially own the Common Stock held of record by (a) Onex Partners III LP, Onex Partners III Select LP, and Onex Partners III PV LP through Onex Corporation's direct ownership and control of Onex Partners GP Inc., the general partner of Onex Partners III GP LP, the general partner of each of Onex Partners III LP, Onex Partners III Select LP, and Onex Partners III PV LP (b) Onex Partners III GP LP, through Onex Corporation's ownership of all of the equity of Onex Partners GP Inc., the general partner of Onex Partners III GP LP, (c) Onex US Principals LP, through Onex Corporation's ownership of all of the equity of Onex American Holdings GP LLC, the general partner of Onex US Principals LP,

Footnote F5

(continued) (d) Onex OP V Holdings SARL, through Onex Corporation's ownership of all of the equity of Onex American Holdings Subco LLC, which controls Onex Partners Holdings LLC, which in turn owns all of the outstanding equity of Onex OP V Holdings SARL; (e) Onex Advisor Subco III LLC, through Gerald W. Schwartz's indirect control of 1597257 Ontario Inc., which owns all of the voting equity of New PCo II Investments Ltd., which owns all of the equity interest of Onex Advisor Subco III LLC; and (f) OPV Gem Aggregator LP, through Onex Corporation's ownership of all of the equity of Onex Partners Canadian GP Inc., which owns all of the equity of Onex Partners V GP Limited, which is the general partner of OPV Gem Aggregator LP.

Footnote F6

Includes: 470,583 shares of Common Stock held of record by Onex Advisor Subco III LLC.

Footnote F7

Effective from May 11, 2026, Mr. Gerald W. Schwartz no longer may be deemed to share beneficial ownership of the shares of Common Stock beneficially owned by Onex Corporation. Mr. Schwartz beneficially owns approximately 0.2% of the Common Stock as a result of his indirect ownership of the equity of Onex Advisor Subco III LLC. Based on certain arrangements regarding the shares of Common Stock held by Onex Advisor Subco III LLC and beneficially owned by Mr. Schwartz, the shares of Common Stock beneficially owned by Mr. Schwartz will be voted in the same manner as shares of Common Stock that may be deemed to be beneficially owned by Onex Corporation. Mr. Schwartz and Onex Corporation may therefore be deemed to be a member of a "group" for purposes of Section 13(d)(3) of the Exchange Act.

Footnote F8

(Continued from footnote 7) Mr. Schwartz disclaims beneficial ownership of the shares of Common Stock that may be deemed to be beneficially owned by Onex Corporation, except to the extent of his pecuniary interest, if any, therein, and Onex Corporation disclaims beneficial ownership of the shares of Common Stock beneficially owned by Mr. Schwartz.

SEC remarks

Due to the limitations of the electronic filing system, Onex Partners Holdings LLC, Onex OP V Holdings SARL, Onex American Holdings GP LLC, Onex US Principals LP, Onex Partners Canadian GP Inc., Onex Partners V GP Limited, OPV Gem Aggregator LP., Kosty Gilis and Anthony Munk are filing a separate Form 4.