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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549

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                                    FORM N-PX
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          ANNUAL REPORT OF PROXY VOTING RECORD OF REGISTERED MANAGEMENT
                               INVESTMENT COMPANY

                  Investment Company Act file number 811-02183

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                         MassMutual Corporate Investors
               (Exact name of registrant as specified in charter)

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                                1500 Main Street
                                   Suite 1100
                              Springfield, MA 01115
               (Address of principal executive offices) (Zip code)
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                  Stephen L. Kuhn, Vice President and Secretary
               1500 Main Street, Suite 2800, Springfield, MA 01115
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                     (name and address of agent for service)


        Registrant's telephone number, including area code: 413-226-1000

                      Date of fiscal year end: December 31

             Date of reporting period: July 1, 2003 - June 30, 2004

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Item 1. Proxy Voting Record

========================MassMutual Corporate Investors Fund=====================
Delstar Holding Corp.

Ticker:                                                                      Security ID: 24736#123

Meeting Date:           September 9, 2003                                     Meeting Type: Annual
Record Date:            August 28, 2003
                                                                                                
#           Proposal                                        Mgt Rec                 Vote Cast               Sponsor
1.1         Elect Director Mark Abrahams                    For                     For                     Management
1.2         Elect Director Martin Doolan                    For                     For                     Management
1.3         Elect Director John Nevin                       For                     For                     Management
1.4         Elect Director James Parsons                    For                     For                     Management
1.5         Elect Director Carlo von Schroeter              For                     For                     Management
1.6         Edward Truslow                                  For                     For                     Management
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Delstar Holding Corp.

Ticker:                                                                      Security ID: 24736#123

Meeting Date:           February 18, 2004                                     Meeting Type: Annual
Record Date:            February 10, 2004
#           Proposal                                        Mgt Rec                 Vote Cast               Sponsor
1.1         Elect Director Mark Abrahams                    For                     For                     Management
1.2         Elect Director Martin Doolan                    For                     For                     Management
1.3         Elect Director John Nevin                       For                     For                     Management
1.4         Elect Director James Parsons                    For                     For                     Management
1.5         Elect Director Carlo von Schroeter              For                     For                     Management
1.6         Edward Truslow                                  For                     For                     Management
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Rent-Way, Inc.

Ticker:                 RWY                                                  Security ID: 76009U104

Meeting Date:           March 10, 2004                                        Meeting Type: Annual
Record Date:            January 21, 2004

#           Proposal                                        Mgt Rec                 Vote Cast               Sponsor
1.1         Elect Director William E. Morgenstern           For                     For                     Management
1.2         Elect Director John W. Higbee                   For                     For                     Management
2           Approve Stock Option Plan                       For                     For                     Management
3           Other Business                                  For                     Against                 Shareholder
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Supreme Industries, Inc.

Ticker:                 STS                                                  Security ID: 868607102

Meeting Date:           April 29, 2004                                        Meeting Type: Annual
Record Date:            March 8, 2004

#           Proposal                                        Mgt Rec                 Vote Cast               Sponsor
1.1         Elect Director H. Douglas Schrock               For                     Withhold                Management
1.2         Elect Director Rice M. Tilley, Jr.              For                     Withhold                Management
1.3         Elect Director Mark C. Neilson                  For                     Withhold                Management
2           Approve Stock Option Plan                       For                     Against                 Management
3           Ratify Auditors                                 For                     Against                 Management
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Transmontaigne Inc.

Ticker:                 TMG                                                  Security ID: 76009U104

Meeting Date:           May 6, 2004                                           Meeting Type: Annual
Record Date:            March 8, 2004
                                                                                                
#           Proposal                                        Mgt Rec                 Vote Cast               Sponsor
1.1         Elect Director Cortlandt S. Dietler             For                     For                     Management
1.2         Elect Director Donald H. Anderson               For                     For                     Management
1.3         Elect Director David J. Butters                 For                     For                     Management
1.4         Elect Director John A. Hill                     For                     For                     Management
1.5         Elect Director Bryan H. Lawrence                For                     For                     Management
1.6         Elect Director Harold R. Logan, Jr.             For                     For                     Management
1.7         Elect Director Edwin H. Morgens                 For                     For                     Management
1.8         Elect Director Wayne W. Murdy                   For                     For                     Management
1.9         Elect Director Walter P. Schuetze               For                     For                     Management
2           Increase Authorized Common Stock                For                     For                     Management

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Chemed Corporation (formerly known as Roto-Rooter, Inc.)

Ticker:     CHE                                                              Security ID: 163596109

Meeting Date:           May 17, 2004                                          Meeting Type: Annual
Record Date:            March 19, 2004

#           Proposal                                        Mgt Rec                 Vote Cast               Sponsor
1.1         Donald Breen                                    For                     No Vote                 Management
1.2         Charles H. Erhart, Jr.                          For                     No Vote                 Management
1.3         Joel F. Gemunder                                For                     No Vote                 Management
1.4         Patrick P. Grace                                For                     No Vote                 Management
1.5         Edward L. Hutton                                For                     No Vote                 Management
1.6         Thomas C. Hutton                                For                     No Vote                 Management
1.7         Sandra E. Laney                                 For                     No Vote                 Management
1.8         Kevin J. McNamara                               For                     No Vote                 Management
1.9         Timothy S. O'Toole                              For                     No Vote                 Management
1.10        Donald E. Saunders                              For                     No Vote                 Management
1.11        George J. Walsh III                             For                     No Vote                 Management
1.12        Frank E. Wood                                   For                     No Vote                 Management
2           To approve and adopt the Company's 2004
            Stock Incentive Plan.                           For                     No Vote                 Management
3.          To approve an amendment to the Company's 2002
            Executive Long-Term   Incentive Plan.           For                     No Vote                 Management
4.          To approve an amendment to the Company's
            Certificate of Incorporation, as amended,
            increasing the number of authorized shares of
            Capital Stock from 15,000,000 shares to
            40,000,000 shares.                              For                     No Vote                 Management
5.          To approve an amendment to the Company's
            Certificate of Incorporation, as amended,
            changing the Company's name to Chemed
            Corporation.                                    For                     No Vote                 Management
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DT Industries, Inc.

Ticker:                 DTII                                                 Security ID: 23333J108

Meeting Date:           November 11, 2003                                     Meeting Type: Annual
Record Date:            September 19, 2003

#           Proposal                                        Mgt Rec                 Vote Cast               Sponsor
1.1         Elect Director James J. Kerley                  For                     No Vote                 Management
1.2         Elect Director John F. Logan                    For                     No Vote                 Management
1.3         Elect Director Charles F. Pollnow               For                     No Vote                 Management
2           Rescind Shareholder Rights Plan                 Against                 No Vote                 Shareholder
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PepsiAmericas, Inc.

Ticker:     PAS                                                              Security ID: 71343P200

Meeting Date:           April 22, 2004                                        Meeting Type: Annual
Record Date:            March 4, 2004
                                                                           
#           Proposal                                        Mgt Rec                 Vote Cast               Sponsor
1.1         Elect Director Brenda C. Barnes                 For                     No Vote                 Management
1.2         Elect Director Herbert M. Baum                  For                     No Vote                 Management
1.3         Elect Director Richard G. Cline                 For                     No Vote                 Management
1.4         Elect Director Pierre S. du Pont                For                     No Vote                 Management
1.5         Elect Director Archie R. Dykes                  For                     No Vote                 Management
1.6         Elect Director Jarobin Gilbert, Jr.             For                     No Vote                 Management
1.7         Elect Director Matthew M. McKenna               For                     No Vote                 Management
1.8         Elect Director Lionel L. Nowell, III            For                     No Vote                 Management
1.9         Elect Director Robert C. Pohlad                 For                     No Vote                 Management
2           Approval of Amendment to 2000 Stock
            Incentive Plan.                                 For                     No Vote                 Management
3           Ratification of Appointment of Independent
            Auditors.                                       For                     No Vote                 Management
4           Limit Awards to Executives                      Against                 No Vote                 Shareholder
5           Report on Recycling Policy                      Against                 No Vote                 Shareholder
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TGC Industries, Inc.

Ticker:     TGCI                                                             Security ID: 872417308

Meeting Date:           April 22, 2004                                        Meeting Type: Annual
Record Date:            March 4, 2004

#           Proposal                                        Mgt Rec                 Vote Cast               Sponsor
1.1         Elect Director Allen T. McInnes                 For                     No Vote                 Management
1.2         Elect Director Wayne A. Whitener                For                     No Vote                 Management
1.3         Elect Director William J. Barrett               For                     No Vote                 Management
1.4         Elect Director Herbert M. Gardner               For                     No Vote                 Management
1.5         Elect Director Edward L. Flynn                  For                     No Vote                 Management
1.6         Elect Director William C. Hurtt, Jr.            For                     No Vote                 Management
2.          Ratification of Selection of Lane               For                     No Vote                 Management
            Gorman Trubitt, L.L.P. as
            Independent Auditors



                                   SIGNATURES
                           [See General Instruction F]

Pursuant to the requirements of the Investment Company Act of 1940, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

(Registrant) MassMutual Corporate Investors



By (Signature and Title)* /s/ Roger W. Crandall
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                          Roger W. Crandall, President


Date: August 31, 2004


* Print the name and title of each signing officer under his or her signature.

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