[Form 4] INTERPUBLIC GROUP OF COMPANIES, INC. Insider Trading Activity

Rhea-AI Filing Summary

Interpublic Group of Companies (IPG) CFO Ellen Johnson reported the disposition of 143,373 shares of IPG common stock on 11/26/2025. The filing states this disposition occurred pursuant to a merger in which EXT Subsidiary Inc. was merged into IPG, with IPG becoming a wholly owned subsidiary of Omnicom Group Inc.

At the effective time of the merger, each share of IPG common stock was converted into the right to receive 0.344 shares of Omnicom common stock plus cash in lieu of fractional shares. In addition, each outstanding IPG restricted stock unit held prior to the effective time was converted into a cash award equal to the fair market value of the underlying IPG common stock, while keeping the same vesting and settlement conditions.

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Equity compensation and M&A specialist

Form 4 shows IPG CFO equity converted into Omnicom stock and cash via merger.

This Form 4 reports that IPG’s CFO, Ellen Johnson, disposed of 143,373 shares of IPG common stock in connection with a merger where IPG became a wholly owned subsidiary of Omnicom Group Inc. The disposition is mechanical, tied to the merger structure rather than an open‑market sale.

The explanation notes that each IPG share was converted into the right to receive 0.344 shares of Omnicom common stock plus cash in lieu of fractional shares. It also states that all outstanding IPG restricted stock units were converted into cash awards equal to the fair market value of the underlying IPG shares, preserving their vesting and settlement terms. This indicates the executive’s equity exposure is transitioning from IPG stock and RSUs to Omnicom stock and cash-based awards as a result of the merger terms.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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X

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Johnson Ellen Tobi

(Last) (First) (Middle)

IPG

909 THIRD AVENUE

(Street)

NEW YORK NY 10022

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
INTERPUBLIC GROUP OF COMPANIES, INC. [ IPG ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CFO

3. Date of Earliest Transaction (Month/Day/Year)
11/26/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/26/2025		D(1)		143,373	D	(2)(3)	0	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Disposition pursuant to the merger (the "Merger") of EXT Subsidiary Inc. ("Merger Sub") with and into the Issuer, with the Issuer surviving as a wholly owned subsidiary of Omnicom Group Inc. ("Omnicom"), pursuant to the Agreement and Plan of Merger, dated as of December 8, 2024, by and among the Issuer, Omnicom and Merger Sub (the "Merger Agreement").

2. Pursuant to the Merger Agreement, at the effective time of the Merger (the "Effective Time"), each share of common stock, par value $0.10, of the Issuer (the "Issuer Common Stock"), was converted into the right to receive 0.344 shares (the "Exchange Ratio") of common stock, par value $0.15, of Omnicom (the "Omnicom Common Stock"), plus cash in lieu of fractional shares.

3. Pursuant to the Merger Agreement, each restricted stock unit that was outstanding prior to the Effective Time was converted into a cash award equal to the fair market value of the underlying Issuer Common Stock, subject to the same vesting and settlement conditions.

	/s/ Robert Dobson POA for Ellen Johnson	11/26/2025
	** Signature of Reporting Person	Date
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