COMSAT CORP

Q: Jun 30 2000

FY: Dec 31 1999

Q: Mar 31 2000

FY: Dec 31 1999

Q: Sep 30 1999

Q: Jun 30 1999

Q: Mar 31 1999

FY: Dec 31 1998

Q: Sep 30 1998

Q: Jun 30 1998

Q: Mar 31 1998

FY: Dec 31 1997

Q: Sep 30 1997

Q: Jul 30 1997

Q: Mar 31 1997

FY: Dec 31 1996

FY: Dec 31 1996

Q: Sep 30 1996

Q: Aug 14 1996

Q: May 15 1996

5,7

5

5,7

5,7

5

5,7

5,7

1

1

1

2

6

2

2

Current report pursuant to Section 13 or 15(d)

1

1

Current report pursuant to Section 13 or 15(d)

Current report pursuant to Section 13 or 15(d)

Current report pursuant to Section 13 or 15(d)

Certification of termination of registration of a class of securities (Section 12(b))

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Prospectus Supplement with Pricing Information

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Definitive Proxy Statement

No description available

No description available

Preliminary Proxy Statement

Additional proxy soliciting materials filed by a non-management party

Additional Information for Proxy Statement/ Votes

No description available

No description available

No description available

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

CRAMER ROSENTHAL MCGLYNN LLC /ADV

MORGAN STANLEY DEAN WITTER & CO

GABELLI FUNDS INC ET AL

LOCKHEED MARTIN CORP

LOCKHEED MARTIN CORP

LOCKHEED MARTIN CORP

COMSAT CORP

LOCKHEED MARTIN CORP

LOCKHEED MARTIN CORP

LOCKHEED MARTIN CORP

COMSAT CORP

LOCKHEED MARTIN CORP

LOCKHEED MARTIN CORP

LOCKHEED MARTIN CORP

GABELLI FUNDS INC ET AL

COMSAT CORP

LOCKHEED MARTIN CORP

COMSAT CORP

LOCKHEED MARTIN CORP

CRAMER ROSENTHAL MCGLYNN LLC /ADV