# EDGAR Filing Document

**Accession Number:** 0000051644
**File Stem:** 0001193125-25-300707
**Filing Date:** 2025-11
**Character Count:** 16839
**Document Hash:** c0569705a4e540a67bd0f9df86aeecde
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-300707.hdr.sgml**: 20251126

**ACCESSION NUMBER**: 0001193125-25-300707

**CONFORMED SUBMISSION TYPE**: S-8 POS

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251126

**DATE AS OF CHANGE**: 20251126

**EFFECTIVENESS DATE**: 20251126

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** INTERPUBLIC GROUP OF COMPANIES, INC.
- **CENTRAL INDEX KEY:** 0000051644
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-ADVERTISING AGENCIES [7311]
- **ORGANIZATION NAME:** 07 Trade & Services
- **EIN:** 131024020
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** S-8 POS
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-61371
- **FILM NUMBER:** 251531078

**BUSINESS ADDRESS:**
- **STREET 1:** 909 THIRD AVENUE
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10022
- **BUSINESS PHONE:** 212-704-1200

**MAIL ADDRESS:**
- **STREET 1:** 909 THIRD AVENUE
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10022

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** INTERPUBLIC GROUP OF COMPANIES INC
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MCCANN ERICKSON INC
- **DATE OF NAME CHANGE:** 19710715

**As filed with the Securities and Exchange Commission on November 26, 2025** 

---

| | | |
|:---|:---|:---|
| **Registration Statement No. 333-231710** | **Registration Statement No. 333-59254** | **Registration Statement No. 033-20291** |
| **Registration Statement No. 333-208670** | **Registration Statement No. 333-42675** | **Registration Statement No. 033-10087** |
| **Registration Statement No. 333-196194** | **Registration Statement No. 333-28029** | **Registration Statement No. 033-05352** |
| **Registration Statement No. 333-159546** | **Registration Statement No. 333-23603** | **Registration Statement No. 033-02830** |
| **Registration Statement No. 333-159544** | **Registration Statement No. 333-04747** | **Registration Statement No. 002-98324** |
| **Registration Statement No. 333-134498** | **Registration Statement No. 033-61371** | **Registration Statement No. 002-97440** |
| **Registration Statement No. 333-134497** | **Registration Statement No. 033-64062** | **Registration Statement No. 002-91564** |
| **Registration Statement No. 333-115924** | **Registration Statement No. 033-28143** | **Registration Statement No. 002-90878** |
| **Registration Statement No. 333-115923** | **Registration Statement No. 033-25555** | **Registration Statement No. 002-88165** |
| **Registration Statement No. 333-89896** | **Registration Statement No. 033-22008** | **Registration Statement No. 002-79071** |
| **Registration Statement No. 333-34718** | **Registration Statement No. 033-21605** |  |

---

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**WASHINGTON, D.C. 20549** 

**POST EFFECTIVE AMENDMENT TO** 

**FORM S-8**

---

| | | |
|:---|:---|:---|
| **REGISTRATION STATEMENT NO. 333-231710** | **REGISTRATION STATEMENT NO. 333-59254** | **REGISTRATION STATEMENT NO. 033-20291** |
| **REGISTRATION STATEMENT NO. 333-208670** | **REGISTRATION STATEMENT NO. 333-42675** | **REGISTRATION STATEMENT NO. 033-10087** |
| **REGISTRATION STATEMENT NO. 333-196194** | **REGISTRATION STATEMENT NO. 333-28029** | **REGISTRATION STATEMENT NO. 033-05352** |
| **REGISTRATION STATEMENT NO. 333-159546** | **REGISTRATION STATEMENT NO. 333-23603** | **REGISTRATION STATEMENT NO. 033-02830** |
| **REGISTRATION STATEMENT NO. 333-159544** | **REGISTRATION STATEMENT NO. 333-04747** | **REGISTRATION STATEMENT NO. 002-98324** |
| **REGISTRATION STATEMENT NO. 333-134498** | **REGISTRATION STATEMENT NO. 033-61371** | **REGISTRATION STATEMENT NO. 002-97440** |
| **REGISTRATION STATEMENT NO. 333-134497** | **REGISTRATION STATEMENT NO. 033-64062** | **REGISTRATION STATEMENT NO. 002-91564** |
| **REGISTRATION STATEMENT NO. 333-115924** | **REGISTRATION STATEMENT NO. 033-28143** | **REGISTRATION STATEMENT NO. 002-90878** |
| **REGISTRATION STATEMENT NO. 333-115923** | **REGISTRATION STATEMENT NO. 033-25555** | **REGISTRATION STATEMENT NO. 002-88165** |
| **REGISTRATION STATEMENT NO. 333-89896** | **REGISTRATION STATEMENT NO. 033-22008** | **REGISTRATION STATEMENT NO. 002-79071** |
| **REGISTRATION STATEMENT NO. 333-34718** | **REGISTRATION STATEMENT NO. 033-21605** |  |

---

***UNDER***

***THE SECURITIES ACT OF 1933***

## THE INTERPUBLIC GROUP OF COMPANIES, INC.
**(Exact name of registrant as specified in charter)** 

---

| | |
|:---|:---|
| **Delaware** | **13-1024020** |
| **(State or other jurisdiction of<br>incorporation or organization)** | **(I.R.S. Employer<br>Identification No.)** |

---

**909 Third Avenue** 

**New York, New York 10022** 

**(212) 704-1200** 

**(Address, including zip code, and telephone number, including area code, of registrant's principal executive offices)** 

**THE INTERPUBLIC GROUP OF COMPANIES, INC. 2019 PERFORMANCE INCENTIVE PLAN** 

**THE INTERPUBLIC GROUP OF COMPANIES, INC. 2016 EMPLOYEE STOCK PURCHASE PLAN** 

**THE INTERPUBLIC GROUP OF COMPANIES, INC. 2014 PERFORMANCE INCENTIVE PLAN** 

**THE INTERPUBLIC GROUP OF COMPANIES, INC. 2009 PERFORMANCE INCENTIVE PLAN** 

**THE INTERPUBLIC GROUP OF COMPANIES, INC. 2009 NON-MANAGEMENT DIRECTORS' STOCK INCENTIVE PLAN** 

**THE INTERPUBLIC GROUP OF COMPANIES, INC. 2006 PERFORMANCE INCENTIVE PLAN** 

**THE INTERPUBLIC GROUP OF COMPANIES, INC. 2006 EMPLOYEE STOCK PURCHASE PLAN** 

**THE INTERPUBLIC NON-MANAGEMENT DIRECTORS' STOCK INCENTIVE PLAN** 

**THE INTERPUBLIC GROUP OF COMPANIES, INC. 2004 PERFORMANCE INCENTIVE PLAN** 

**THE INTERPUBLIC GROUP OF COMPANIES, INC. 2002 PERFORMANCE INCENTIVE PLAN** 

**NFO RESEARCH, INC. STOCK OPTION PLAN** 

**NFO RESEARCH, INC. DIRECTORS' STOCK OPTION PLAN** 

**THE TRUE NORTH COMMUNICATIONS INC. STOCK OPTION PLAN** 

**THE TRUE NORTH COMMUNICATIONS INC. OUTSIDE DIRECTOR STOCK OPTION PLAN** 

**THE BOZELL, JACOBS, KENYON & ECKHARDT, INC. STOCK OPTION PLAN** 

**THE INTERPUBLIC GROUP OF COMPANIES, INC. 1997 PERFORMANCE INCENTIVE PLAN** 

**THE INTERPUBLIC OUTSIDE DIRECTORS' STOCK INCENTIVE PLAN** 

**THE INTERPUBLIC GROUP OF COMPANIES, INC. 1996 STOCK INCENTIVE PLAN** 

**THE INTERPUBLIC GROUP OF COMPANIES, INC. 1995 EMPLOYEE STOCK PURCHASE PLAN** 

**(Full title of the plans)** 

**Andrew Bonzani** 

**Executive Vice President and General Counsel** 

**The Interpublic Group of Companies, Inc.** 

**909 Third Avenue** 

**New York, New York 10022** 

**(212) 704-1200** 

**(Name, address, including zip code, and telephone number, including area code, of agent for service)** 

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

---

| | | | |
|:---|:---|:---|:---|
| Large accelerated filer | ☒ | Accelerated filer | ☐ |
| Non-accelerated filer | ☐ | Smaller reporting company | ☐ |
|  |  | Emerging growth company | ☐ |

---

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

------

**EXPLANATORY NOTE** 

**Deregistration of Securities** 

This Post-Effective Amendment (this "Post-Effective Amendment") relates to the following registration statements on Form S-8 (collectively, the "Prior Registration Statements") of The Interpublic Group of Companies, Inc., a Delaware corporation (the "Registrant"), which have been previously filed with the U.S. Securities and Exchange Commission (the "SEC"), to deregister any and all securities that remain unsold under each such Prior Registration Statement as of the date hereof:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. Registration Statement on Form S-8, No. 333-231710, filed with the SEC on March 23, 2019, registering the offer and sale of 32,000,000 shares of common stock, par value $0.10 per share ("Shares"), for issuance under the
Registrant's 2019 Performance Incentive Plan.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. Registration Statement on Form S-8, File No. 333-208670, filed with the SEC on December 21, 2015, registering 10,000,000 Shares for issuance under the Registrant's 2016 Employee Stock Purchase Plan.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3. Registration Statement on Form S-8, File No. 333-196194, filed with the SEC on May 22, 2014, registering 34,500,000 Shares for issuance under the Registrant's 2014 Performance Incentive Plan.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4. Registration Statement on Form S-8, File No. 333-159546, filed with the SEC on May 28, 2009, registering 34,517,816 Shares for issuance under the Registrant's 2009 Performance Incentive Plan.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5. Registration Statement on Form S-8, File No. 333-159544, filed with the SEC on May 28, 2009, registering 900,000 Shares for issuance under the Registrant's 2009 Non-Management Directors'
Stock Incentive Plan.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6. Registration Statement on Form S-8, File No. 333-134498, filed with the SEC on May 26, 2006 (as amended by Post-Effective Amendment No. 1, filed with the SEC on May 28, 2009), registering 41,400,000 Shares for issuance under the
Registrant's 2006 Performance Incentive Plan.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7. Registration Statement on Form S-8, File No. 333-134497, filed with the SEC on May 26, 2006, registering 15,000,000 Shares for issuance under the Registrant's 2006 Employee Stock Purchase Plan.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;8. Registration Statement on Form S-8, File No. 333-115924, filed
with the SEC on May 27, 2004, registering 200,000 Shares for issuance under the Interpublic Non-Management Directors' Stock Incentive Plan.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;9. Registration Statement on Form S-8, File No. 333-115923, filed with the SEC on May 27, 2004, registering 18,500,000 Shares for issuance under the Registrant's 2004 Performance Incentive Plan.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;10. Registration Statement on Form S-8, File No. 333-89896, filed with the SEC on June 6, 2002, registering 12,500,000 Shares for issuance under the Registrant's 2002 Performance Incentive Plan.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;11. Post-Effective Amendment No. 1 on Form S-8 to the Registration
Statement on Form S-4, File No. 333-34718, filed with the SEC on May 22, 2000, relating to 14,734,283 Shares issuable under the (i) NFO Research, Inc.
Stock Option Plan, as amended, and (ii) NFO Research, Inc. Directors' Stock Option Plan.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;12. Post-Effective Amendment No. 1 on Form S-8 to the Registration
Statement on Form S-4, File No. 333-59254, filed with the SEC on July 2, 2001, registering 8,626,023 Shares for issuance under the (i) True North
Communications Inc. Stock Option Plan, (ii) True North Communications Inc. Outside Director Stock Option Plan, and (iii) Bozell, Jacobs, Kenyon & Eckhardt, Inc. Stock Option Plan.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;13. Registration Statement on Form S-8, File No. 333-42675, filed with the SEC on December 19, 1997, registering 8,500,000 Shares for issuance under the Registrant's 1997 Performance Incentive Plan.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;14. Registration Statement on Form S-8, File No. 333-28029, filed with the SEC on May 30, 1997, registering 200,000 Shares for issuance under the Interpublic Outside Directors' Stock Incentive Plan.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;15. Registration Statement on Form S-8, File No. 333-23603, filed with the SEC on March 19, 1997, registering 815,000 Shares for issuance under the Registrant's 1996 Stock Incentive Plan.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;16. Registration Statement on Form S-8, File No. 333-04747, filed with the SEC on May 30, 1996, registering 375,000 Shares for issuance under the Registrant's 1996 Stock Incentive Plan.

------

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;17. Registration Statement on Form S-8, File No. 033-61371, filed with the SEC on July 28, 1995, registering 6,000,000 Shares for issuance under the Registrant's 1995 Employee Stock Purchase Plan.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;18. Registration Statement on Form S-8, File No. 033-64062, filed with
the SEC on June 8, 1993.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;19. Registration Statement on Form S-8, File No. 033-28143, filed with
the SEC on April 17, 1989.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;20. Registration Statement on Form S-8, File No. 033-25555, filed with
the SEC on November 23, 1988.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;21. Registration Statement on Form S-8, File No. 033-22008, filed with
the SEC on May 23, 1988.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;22. Registration Statement on Form S-8, File No. 033-21605, filed with
the SEC on May 2, 1988.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;23. Registration Statement on Form S-8, File No. 033-20291, filed with
the SEC on March 3, 1988.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;24. Registration Statement on Form S-8, File No. 033-10087, filed with
the SEC on November 12, 1986.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;25. Registration Statement on Form S-8, File No. 033-05352, filed with
the SEC on May 2, 1986.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;26. Registration Statement on Form S-8, File No. 033-02830, filed with
the SEC on January 28, 1986.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;27. Registration Statement on Form S-8, File No. 002-98324, filed with
the SEC on June 12, 1985.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;28. Registration Statement on Form S-8, File No. 002-97440, filed with
the SEC on May 2, 1985.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;29. Registration Statement on Form S-8, File No. 002-91564, filed with
the SEC on June 11, 1984.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;30. Registration Statement on Form S-8, File No. 002-90878, filed with
the SEC on May 10, 1984.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;31. Registration Statement on Form S-8, File No. 002-88165, filed with
the SEC on December 1, 1983.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;32. Registration Statement on Form S-8, File No. 002-79071, filed with
the SEC on August 30, 1982.

On November 26, 2025 (the "Effective Date"), pursuant to the Agreement and Plan of Merger, dated as of December 8, 2024, by and among the Registrant, Omnicom Group Inc., a New York corporation ("Omnicom"), and EXT Subsidiary Inc., a Delaware corporation and a direct wholly owned subsidiary of Omnicom ("Merger Sub"), Merger Sub merged with and into the Registrant (the "Merger"), with the Registrant continuing as the surviving corporation and a wholly owned subsidiary of Omnicom. This Post-Effective Amendment is being filed as a result of the Merger.

As a result of the Merger, the Registrant has terminated all offerings of its securities pursuant to its existing registration statements, including the Prior Registration Statements. In accordance with an undertaking made by the Registrant in the Prior Registration Statements to remove from registration by means of a post-effective amendment any securities registered under the Prior Registration Statements that remain unsold at the termination of the offerings, the Registrant hereby removes from registration any securities registered under the Prior Registration Statements which remained unsold as of the Effective Date.

------

**SIGNATURES** 

Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant certifies that it has reasonable grounds to believe that it meets all the requirements for filing on Form S-8 and has duly caused this Post-Effective Amendment to the Prior Registration Statements to be signed on its behalf by the undersigned, thereunto duly authorized, in New York, New York, on the 26th day of November, 2025.

---

| | |
|:---|:---|
|  **THE INTERPUBLIC GROUP OF COMPANIES, INC.** | **THE INTERPUBLIC GROUP OF COMPANIES, INC.** |
|  By: | /s/ Andrew Bonzani |
|  | Name: Andrew Bonzani |
|  | Title: Executive Vice President and General Counsel |

---

No other person is required to sign this Post-Effective Amendment in reliance upon Rule 478 under the Securities Act of 1933, as amended.