AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON APRIL 7, 2000
                              SUBJECT TO AMENDMENT
                                                     REGISTRATION NO. 333-95359

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                 ---------------

                                 Amendment No. 2
                                       to
                                    FORM S-3
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933
                                 ---------------

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

               Delaware                                  13-1024020
(State or other jurisdiction of             (I.R.S. Employer Identification No.)
incorporation or organization)

                           1271 Avenue of the Americas
                            New York, New York 10020
                                  212-399-8000
                   (Address, including zip code, and telephone
             number, including area code, of registrant's principal
                               executive offices)

                   NICHOLAS J. CAMERA, SENIOR VICE PRESIDENT,
                           GENERAL COUNSEL & SECRETARY
                    THE INTERPUBLIC GROUP OF COMPANIES, INC.
                           1271 Avenue of the Americas
                            New York, New York 10020
                                  212-399-8000
            (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)
                                 ---------------
        The Commission is requested to mail signed copies of all orders,
                         notices and communications to:

   Theodore H. Paraskevas, Esq.                             Barry Fox, Esq.
      The Interpublic Group                             Cleary, Gottlieb, Steen
        of Companies, Inc.                                    & Hamilton
   1271 Avenue of the Americas                             One Liberty Plaza
     New York, New York 10020                          New York, New York 10006
           212-399-8000                                      212-225-2000

APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after this Registration Statement becomes effective.

                                 ---------------
     If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. |_|

     If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. |X|

     If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. |_|

     If this Form is a post-effective amendment filed pursuant to Rule 462(b)
under the Securities Act, please check the following box and list the Securities
Act registration statement number of the earlier effective registration
statement for the same offering. |_|

     If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. |_|

                                 ---------------
                         CALCULATION OF REGISTRATION FEE


 Title of each class of securities       Amount to be        Proposed       Proposed maximum          Amount of
          to be registered                registered         maximum       aggregate offering     registration fee**
                                                             offering            price*
                                                            price per
                                                              share*
                                                                                      
Common Stock, par value $.10 per
share                                    1,440,599 shares   $ 47.75        $ 68,788,602           $ 18,160.19


* Estimated solely for the purpose of calculating the registration fee pursuant
to Rule 457(c) under the Securities Act of 1933, as amended, and based on the
average of the high and low prices of the Common Stock on the New York Stock
Exchange on March 31, 2000.


** Of this amount, $16,732.29 was previously paid by the registrant.

                                 ---------------
     The Registrant hereby amends this Registration Statement on such date or
dates as may be necessary to delay its Effective Date until the Registrant shall
file a further amendment which specifically states that this Registration
Statement shall thereafter become effective in accordance with Section 8(a) of
the Securities Act of 1933 or until the Registration Statement shall become
effective on such date as the Commission, acting pursuant to said Section 8(a),
may determine.



++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ + The information contained in this Prospectus is not complete + + and may be changed. We may not sell these secuities until + + the registration statement filed with the Securities and + + Exchange Commission or any applicable state securities + + commission is effective. This Prospectus is not an offer to + + sell these securities and is not soliciting an offer to buy + + these securities in any state where the offer or sale is not + + permitted. + ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Subject to Completion, Dated April 7, 2000 Prospectus 1,440,599 Shares THE INTERPUBLIC GROUP OF COMPANIES, INC. Common Stock ----------------- This is a public offering of shares of common stock, par value $.10 per share, of the Interpublic Group of Companies, Inc. by the selling stockholders named in this Prospectus. The selling stockholders are offering 1,440,599 shares of common stock of Interpublic. Interpublic will not receive any of the proceeds from the offering. The common stock is listed on the New York Stock Exchange under the symbol "IPG." On March 31, 2000, the last reported sale price of the common stock on the NYSE was $47 1/4 per share. Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved these securities or determined if this Prospectus is truthful or complete. Any representation to the contrary is a criminal offense. Prospectus dated April , 2000

TABLE OF CONTENTS Available Information.................................................. 2 Incorporation of Certain Information by Reference...................... 3 The Company............................................................ 3 Use of Proceeds........................................................ 3 Common Stock Price Range and Dividends................................. 4 Selling Stockholders................................................... 5 Plan of Distribution................................................... 10 Legal Matters.......................................................... 10 Experts................................................................ 10 ------------------- Unless the context otherwise requires, "the company," "we," "us," "ours" or "Interpublic" means the Interpublic Group of Companies, Inc., a Delaware corporation. AVAILABLE INFORMATION We have filed with the Securities and Exchange Commission (the "SEC" or "Commission") a registration statement on Form S-3, under the Securities Act of 1933, as amended (the "Securities Act") for the registration of the common stock offered hereby. This prospectus constitutes a part of that registration statement and does not contain all the information set forth in that registration statement, certain parts of which have been omitted as permitted by the rules and regulations of the SEC. For further information regarding Interpublic and the common stock offered hereby, you should refer to that registration statement. In accordance with the Exchange Act, we file reports, proxy statements and other information with the SEC. You may read and copy materials we have filed with the SEC at the public reference facilities maintained by the SEC at Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549, and at the following regional offices of the SEC: Seven World Trade Center, Suite 1300, New York, New York 10048 and Citicorp Center, 500 West Madison Street, Suite 1400, Chicago, Illinois 60661-2511. Please call the SEC at 1-800-SEC-0330 for further information on the public reference rooms. Copies of such materials can be obtained by mail from the Public Reference Section of the SEC, at Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549, at prescribed rates. The SEC maintains a World Wide Web site on the Internet at http://www.sec.gov that contains reports, proxy statements and other information regarding registrants that file electronically with the SEC. In addition, you can inspect reports, proxy statements and other information concerning the Company at the offices of the New York Stock Exchange, Inc., 20 Broad Street, New York, New York 10005.

INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE We incorporate by reference into this prospectus the documents listed below and any future filings we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, as amended, including any filings after the date of this prospectus, until we have sold all of the securities to which this prospectus relates or the offering is otherwise terminated: - Our Annual Report on Form 10-K for the year ended December 31, 1999; - Our Proxy Statement for the 1999 annual meeting of stockholders; and - The description of the common stock contained in our registration statements on Form 8-A, dated June 29, 1971 and October 8, 1975, respectively, as amended on Forms 8, dated February 24, 1983, June 12, 1984, September 13, 1984, June 25, 1985, July 15, 1987 and May 19, 1988 and as further amended by any subsequent amendment or report filed for the purpose of updating that description. The information incorporated by reference is an important part of this prospectus. Any statement in a document incorporated by reference into this prospectus will be deemed to be modified or superseded for purposes of this prospectus to the extent a statement contained in (1) this prospectus or (2) any other subsequently filed document that is incorporated by reference into this prospectus modifies or supersedes such statement. You may request a copy at no cost of any or all of the documents referred to above other than those exhibits to such documents which are not specifically incorporated by reference therein. Written or telephone requests should be directed to Thomas J. Volpe, Senior Vice President-Financial Operations, The Interpublic Group of Companies, Inc., 1271 Avenue of the Americas, New York, New York 10020; telephone number (212) 399-8000. THE COMPANY Our principal executive offices are located at 1271 Avenue of the Americas, New York, New York 10020 (telephone:(212) 399-8000). USE OF PROCEEDS We will not receive any of the proceeds from the sale of the common stock offered hereby. See "Selling Stockholders."

COMMON STOCK PRICE RANGE AND DIVIDENDS Interpublic's common stock is listed on the New York Stock Exchange under the symbol "IPG." The table below shows the range of reported last sale prices on the New York Stock Exchange Composite Tape for Interpublic's common stock for the periods indicated and the dividends declared per share on the common stock for such periods. On May 17, 1999, Interpublic announced: - a two-for-one stock split payable in the form of a stock dividend on July 15, 1999 to stockholders of record on June 29, 1999; and - a $.085 per share (post-split) cash dividend for the second quarter of 1999 payable on June 15, 1999 to stockholders of record on May 27, 1999. Sales prices and per share amounts have been adjusted to reflect this two-for-one stock split. Cash Common Dividends Stock Price Declared Per --------------------- High Low Share -------- -------- ------------ Year ended December 31, 1997 First Quarter................ $18 5/16 $16 1/8 $.065 Second Quarter............... 20 11/16 17 1/2 .065 Third Quarter................ 25 11/16 20 3/4 .065 Fourth Quarter............... 26 1/4 22 5/8 .065 Year ended December 31, 1998 First Quarter................ $31 5/16 $23 27/32 $.065 Second Quarter............... 32 1/4 27 21/32 .075 Third Quarter................ 32 7/16 26 3/32 .075 Fourth Quarter............... 39 7/8 23 1/2 .075 Year ended December 31, 1999 First Quarter................ $40 1/4 $36 7/8 $.075 Second Quarter............... 43 5/16 37 5/8 .085 Third Quarter................ 44 5/16 39 .085 Fourth Quarter............... 58 39 1/4 .085 Period ended March 31, 2000........ $ 55 9/16 $37 .085 On March 31, 2000, the last sale price of our common stock, as reported on the New York Stock Exchange Composite Tape, was $47 1/4 per share. We are not aware of any restrictions on our present or future ability to pay dividends. However, in connection with certain borrowing facilities entered into by Interpublic and its subsidiaries, we are subject to certain restrictions on the ratio of cash flow to consolidated borrowings, the ratio of consolidated borrowings to net worth and the minimum amount of net worth. Any future dividend payments will be made at the discretion of Interpublic's board of directors.

SELLING STOCKHOLDERS The following table sets forth certain information with respect to the selling stockholders, including: - the name of each selling stockholder; - the number of shares of common stock beneficially owned by such selling stockholder prior to the offering; - the maximum number of shares of such common stock to be offered by such selling stockholder hereby; and - the number of shares of common stock to be beneficially owned by such selling stockholder assuming all of the shares of such selling stockholder covered by this prospectus are distributed in the offering. No selling stockholder beneficially owns one percent (1%) or more of Interpublic's issued and outstanding common stock. Because the selling stockholders or their transferees may offer all, a portion or none of the common stock offered pursuant to this prospectus, no estimate can be given as to the amount of common stock that will be held by the selling stockholders upon termination of the offering. See "Plan of Distribution."

Number of Shares to be Beneficially Owned after Number of Shares Offering, Assuming All Beneficially Owned Maximum Number of Shares Offered are Name of Selling Stockholder (1) Prior to the Offering Shares to be Offered Distributed - ----------------------------------------- --------------------- -------------------- ------------------------ Robert G. Beckel........................ 2,402 1,632 770 Lynda Bernard........................... 1,210 769 441 Michael J.P. Boland..................... 50,336 34,196 16,140 Diana Bork, as trustee under Declaration of Trust dated February 22, 1996....................... 6,380 4,335 2,045 Robert H. Bork, Jr., as trustee under Declaration of Trust dated February 22, 1996....................... 6,380 4,335 2,045 John A. Brennan, Jr..................... 15,301 9,607 5,694 James P. Fabiani......................... 64,729 40,663 24,066 Lester G. Fant........................... 27,048 17,752 9,296 Barbara G. Fant.......................... 19,816 13,006 6,810 Keith Frederick.......................... 4,954 3,366 1,588 Gregory M. Gill.......................... 2,674 1,671 1,003 Henry Giugni............................. 3,755 2,347 1,408 Carl Franklin Godfrey, Jr................ 6,391 4,015 2,376 Lawrence C. Grossman..................... 1,132 704 428 Terry Haines............................. 3,690 2,319 1,371 Michelle R. Hartz........................ 3,200 2,011 1,189 John T. Hendrick......................... 10,355 6,505 3,850 Paul H. Jensen........................... 2,110 1,313 797 Jeffrey L. Lawrence...................... 2,373 1,476 897 Dale W. Leibach.......................... 3,745 2,329 1,416 Judy Leon................................ 1,279 809 470 Peter T. Madigan......................... 50,336 34,196 16,140 Arthur D. Mason.......................... 808 512 296 Daniel P. O'Brien........................ 1,187 754 433 Jerome W. Pickholz....................... 15,322 10,410 4,912 Barry D. Rhoads.......................... 1,048 659 389 Martin A. Russo.......................... 18,806 11,814 6,992 Greg Schneiders.......................... 4,954 3,366 1,588 Barbara Sutton........................... 1,359 855 504 Dan C. Tate.............................. 2,582 1,606 976 Dan Tate, Jr............................. 3,658 2,286 1,372 Sheila B. Tate........................... 6,366 3,999 2,367 Joseph L. Powell, as escrow agent on behalf of L. Gaye Torrance under the escrow agreement dated October 29, 1999..................................... 2,601 1,653 948 Julie Tufts.............................. 1,242 791 451 Cathy Tweedy............................. 15,322 10,410 4,912 Vincent M. Versage....................... 4,490 2,821 1,669 Gerald F. Warburg........................ 6,100 3,833 2,267 John Young............................... 1,681 1,040 641 The Cassidy Companies ESOP, HSBC Bank, Trustee; Cassidy and Associates, Inc. Employee Stock Ownership Trust, HSBC Trust Bank USA, Trustee.................. 323,330 219,649 103,681 T. Mac Barnhardt......................... 7,906 3,953 3,953 William C. Breed, IV..................... 7,906 3,953 3,953 Marvin M. Giles, III..................... 31,620 15,810 15,810 C. Vernon Spratley, III.................. 31,620 15,810 15,810 James X. Mullen.......................... 99,720 49,860 49,860 Mullen Advertising, Inc. Employee Retirement and Savings Plan Trust Fund, James X. Mullen, Trustee................. 162,804 81,402 81,402 Paul Silverman........................... 30,664 15,332 15,332 Jeanne Masucci........................... 1,604 802 802 Steve Haesche............................ 936 468 468 Joseph Grimaldi.......................... 13,432 6,716 6,716 Edward Boches............................ 9,292 4,646 4,646 Michael E. Kassan and Ronnie K. Kassan, Trustees of The Kassan Family Trust dated April 27, 1990........ 44,093 44,093 0 Ryan R. Magnussen........................ 69,084 17,271 51,813 Patrick G. Bradley....................... 69,084 17,271 51,813 Steven J. Voci........................... 9,019 2,255 6,764 Matthew C. Azar.......................... 666 167 499 Marco Chiriguayo......................... 1,332 333 999 Jill M. Giardino......................... 56 14 42 Robert J. Huey........................... 69 17 52 Edward A. Lewis.......................... 41 10 31 Andrew N. Lientz......................... 1,388 347 1,041 Terri A. Mabry........................... 888 222 666 Brian J. Malone.......................... 41 10 31 Matthew C. Minkin........................ 2,220 555 1,665 Brian M. Platz........................... 14 4 10 Milind R. Raval.......................... 278 70 208 Steven L. Sklar.......................... 556 139 417 Andrew L. Tress.......................... 666 167 499 Fan Tso.................................. 3,469 867 2,602 Frank Butterworth........................ 79,093 79,093 0 David Cyril Laidler...................... 79,093 79,093 0 Brian David Rees......................... 79,093 79,093 0 Mark Bruce Dalgleish..................... 165,412 165,412 0 James Wilson............................. 7,351 7,351 0 Laurie Greenall.......................... 6,000 6,000 0 William and Suzane Gordon................ 94,287 47,143 47,144 Tom George (2)........................... 18,088 18,088 0 Langtry Trust Company, as trustee for The Capital Trust, The CSI International Share Scheme Trust and The Michael Watt Voluntary Settlement Trust .............. 374,630 105,474 269,156 Total 2,203,967 1,335,125 868,842 (1) Each selling stockholder is a former shareholder or option holder of a company acquired by Interpublic, or the assignee of such former shareholder or option holder. A number of the selling stockholders are or have been employees or officers of affiliates of Interpublic. (2) These shares will be issued upon the exercise of a like number of options.

PLAN OF DISTRIBUTION Interpublic has not been advised by the selling stockholders as to any plan of distribution. Distribution of the common stock by the selling stockholders, or by pledgees, donees (including charitable organizations), transferees or other successors in interest, may be effected from time to time in one or more transactions (which may involve block transactions): - on the NYSE in transactions that may include special offerings and exchange distributions pursuant to and in accordance with the rules of such exchange, - in the over-the-counter market, or - in transactions otherwise than on such exchange or in the over-the-counter market, or in a combination of any such transactions. Such transactions may be effected by the selling stockholders at market prices prevailing at the time of sale, at prices related to such prevailing market prices, at negotiated prices or at fixed prices. The selling stockholders may effect such transactions by selling the common stock to or through broker-dealers, and such broker-dealers may receive compensation in the form of discounts or commissions from the selling stockholders and may receive commissions from the purchasers of the common stock for whom they may act as agent. The selling stockholders may agree to indemnify any broker-dealer or agent that participates in transactions involving sales of the shares against certain liabilities, including liabilities arising under the Securities Act. We have agreed to bear certain expenses (excluding any underwriting fees, expenses, discounts or other costs payable to any underwriter, broker or dealer) in connection with the registration and sale of the common stock being offered by the selling stockholders, estimated to be approximately $44,000. We have agreed to indemnify the selling stockholders against certain liabilities, including certain liabilities under the Securities Act. The selling stockholders and any broker-dealers or agents that participate with the selling stockholders in the distribution of the common stock may be deemed to be "underwriters" within the meaning of the Securities Act, and any commissions received by them and any profit on the resale of any common stock purchased by them may be deemed to be underwriting commissions or discounts under the Securities Act. LEGAL MATTERS The validity of the common stock being offered hereby will be passed upon for Interpublic by Nicholas J. Camera, Esq., Senior Vice President, General Counsel and Secretary of Interpublic. EXPERTS The consolidated financial statements of Interpublic and its subsidiaries incorporated in this prospectus by reference to Interpublic's Annual Report on Form 10-K for the year ended December 31, 1999, except as they relate to Hill, Holliday, Connors, Cosmopulos, Inc. as of and for the year ended December 31, 1997 and to International Public Relations plc, as of and for the year ended December 31, 1997, have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, independent accountants, given on the authority of said firm as experts in auditing and accounting. The audited financial statements of Hill, Holliday, Connors, Cosmopulos, Inc. as of and for the year ended December 31, 1997 and of International Public Relations plc as of and for the year ended December 31, 1997, each a wholly-owned subsidiary of Interpublic, not presented separately in Interpublic's Annual Report on Form 10-K for the year ended December 31, 1999, have been audited by Ernst & Young LLP and Ernst & Young, respectively, independent accountants. Such financial statements, to the extent they have been included in the financial statements of Interpublic, have been so incorporated in reliance on the report of such independent accountants given on the authority of said firms as experts in auditing and accounting.

PART II INFORMATION NOT REQUIRED IN PROSPECTUS ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION. The estimated expenses of issuance and distribution, other than underwriting discounts and commissions, expected to be incurred by the Registrant are as follows: Filing fee of Securities and Exchange Commission relating to registration statement..................... $ 18,160 Fees and expenses of counsel for the Registrant, Cleary, Gottlieb, Steen & Hamilton...................... 20,000 Fee of accountants, PricewaterhouseCoopers LLP............ 6,000 Miscellaneous............................................. 0 Total..................................................... $ 44,160 ========= ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS. Section 145 of Title 8 of the General Corporation Law of the State of Delaware ("GCL") gives a corporation power to indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason of the fact that such person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys' fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by him in connection with such action, suit or proceeding, provided that such director, officer, employee or agent acted in good faith and in a manner reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, provided that such director, officer, employee or agent had no reasonable cause to believe his or her conduct was unlawful. The same Section also gives a corporation power to indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the corporation to procure a judgment in its favor by reason of the fact that such person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against expenses (including attorneys' fees) actually and reasonably incurred by such person in connection with the defense or settlement of such action or suit if he acted in good faith and in a manner reasonably believed to be in or not opposed to the best interests of the corporation, except that no indemnification shall be made in respect of any claim, issue or matter as to which such person shall have been adjudged to be liable to the corporation, unless and only to the extent that the Court of Chancery or the court in which such action or suit was brought shall determine upon application that, despite the adjudication of liability but in view of all the circumstances of the case, such person is fairly and reasonably entitled to indemnity for such expenses which the Court of Chancery or such other court shall deem proper. Section 145 of the GCL further provides that, to the extent that a director, officer, employee or agent of a corporation has been successful on the merits or otherwise in defense of any such action, suit or proceeding, or in defense of any claim, issue or matter therein, he or she shall be indemnified against expenses (including attorneys' fees) actually and reasonably incurred by him or her in connection therewith. The Company's by-laws contain specific authority for indemnification by the Company of current and former directors, officers, employees or agents of the Company on terms that have been derived from Section 145 of Title 8 of the GCL. The Company maintains policies of insurance under which the Company and its directors and officers are insured, subject to specified exclusions and deductible and maximum amounts, against loss arising from any claim which may be made against the Company or any director or officer of the Company by reason of any breach of duty, neglect, error, misstatement, omission or act done or alleged to have been done while acting in their respective capabilities. ITEM 16. EXHIBITS. Exhibit Number Description - -------------- ----------- 4.1 The Restated Certificate of Incorporation of The Interpublic Group of Companies, Inc., incorporated by reference herein from Exhibit 3(i) to Quarterly Report on Form 10-Q for the quarter ended June 30, 1999.+ 4.2 By-laws of The Interpublic Group of Companies, Inc., incorporated by reference herein from Exhibit 4 to Annual Report on Form 10-K for the year ended December 31, 1990.+ 5 Opinion of Nicholas J. Camera, Esq., General Counsel of The Interpublic Group of Companies, Inc., as to the legality of the shares of common stock registered hereunder.+ 23.1 Consent of PricewaterhouseCoopers LLP. 23.2 Consent of Ernst & Young LLP. 23.3 Consent of Ernst & Young. 23.4 Consent of Nicholas J. Camera, Esq., General Counsel of The Interpublic Group of Companies, Inc., (included in Exhibit Number 5).+ 24 Power of Attorney.+ - ------------------- + Previously filed. ITEM 17. UNDERTAKINGS. (a) The undersigned registrant hereby undertakes: (1) To file, during any period in which offers or sales are being made of the securities registered hereby, a post-effective amendment to this registration statement; (i) To include any prospectus required by Section 10(a)(3) of the Securities Act of 1933; (ii) To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in this registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the SEC pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20 percent change in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in this registration statement; and (iii) To include any material information with respect to the plan of distribution not previously disclosed in this registration statement or any material change to such information in this registration statement; provided, however, that the undertakings set forth in paragraphs (i) and (ii) above do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in periodic reports filed with or furnished to the Commission by the registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in this registration statement. (2) That, for the purpose of determining any liability under the Securities Act of 1933, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered herein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. (3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering. (b) The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act of 1933, each filing of the registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934 that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. (c) Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions or otherwise, the registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Securities Act of 1933 and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act of 1933 and will be governed by the final adjudication of such issue. (d) The undersigned registrant hereby undertakes that: (1) For purposes of determining any liability under the Securities Act of 1933, the information omitted from the form of prospectus filed as part of this registration statement in reliance upon Rule 430A and contained in a form of prospectus filed by the registrant pursuant to Rule 424(b)(1) or (4) or 497(h) under the Securities Act of 1933 shall be deemed to be part of this registration statement as of the time it was effective. (2) For the purpose of determining any liability under the Securities Act of 1933, each post-effective amendment that contains a form of prospectus shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be initial bona fide offering thereof.

SIGNATURES Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in The City of New York, State of New York, on the 7th day of April, 2000. THE INTERPUBLIC GROUP OF COMPANIES, INC. (Registrant) By: /s/ Nicholas J. Camera ---------------------- Nicholas J. Camera Senior Vice President, General Counsel and Secretary

EXHIBIT INDEX Exhibit Number Description - ----------------- ------------------------------------------------------------ 4.1 The Restated Certificate of Incorporation of The Interpublic Group of Companies, Inc., incorporated by reference herein from Exhibit 3(i) to Quarterly Report on Form 10-Q for the quarter ended June 30, 1999.+ 4.2 By-laws of The Interpublic Group of Companies, Inc., incorporated by reference herein from Exhibit 4 to Annual Report on Form 10-K for the year ended December 31, 1990.+ 5 Opinion of Nicholas J. Camera, Esq., General Counsel of The Interpublic Group of Companies, Inc., as to the legality of the shares of common stock registered hereunder.+ 23.1 Consent of PricewaterhouseCoopers LLP. 23.2 Consent of Ernst & Young LLP. 23.3 Consent of Ernst & Young. 23.4 Consent of Nicholas J. Camera, Esq., General Counsel of The Interpublic Group of Companies, Inc., (included in Exhibit Number 5).+ 24 Power of Attorney.+ - ------------------- + Previously filed.

EXHIBIT 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in this Registration Statement on Amendment No. 1 to Form S-3 of The Interpublic Group of Companies, Inc. (the "Company") of our report dated February 22, 2000 relating to the financial statements, which appears in the 1999 Annual Report to the Stockholders of the Company, which is incorporated by reference in the Company's Annual Report on Form 10-K for the year ended December 31, 1999. We also consent to the incorporation by reference of our report dated February 22, 2000 relating to the Financial Statement Schedule, which appears in such Annual Report on Form 10-K. We also consent to the reference to us under the heading "Experts" in such Registration Statement. /s/ Pricewaterhouse Coopers LLP ------------------------------- Pricewaterhouse Coopers LLP New York, New York April 5, 2000

EXHIBIT 23.2 CONSENT OF INDEPENDENT ACCOUNTANTS We consent to the reference to our firm under the caption "Experts" in the Registration Statement (Form S-3) and related prospectus of The Interpublic Group of Companies, Inc. (IPG) for the registration of shares of its common stock and to the incorporation by reference therein of our report dated March 13, 1998, with respect to the consolidated financial statements of Hill, Holliday, Cosmopulos, Inc. for the twelve month period ended December 31, 1997, which statements are included in the consolidated financial statements of IPG for the year ended December 31, 1997 incorporated by reference in its Annual Report on Form 10-K for the year ended December 31, 1999, filed with the Securities and Exchange Commission. /s/ Ernst & Young LLP --------------------- Boston, Massachusetts April 5, 2000

EXHIBIT 23.3 CONSENT OF INDEPENDENT AUDITORS We consent to the reference to our firm under the caption "Experts" in the Registration Statement (Form S-3) of The Interpublic Group of Companies, Inc. for the sale of shares of its common stock and to the incorporation by reference therein, of our report, dated February 3, 1999, on the consolidated financial statements of International Public Relations plc which is included in the Annual Report (Form 10-K) of The Interpublic Group of Companies, Inc. for the year ended December 31, 1999. /s/ Ernst & Young ----------------- Ernst & Young April 5, 2000 London, England