<PAGE>
THIS FILING LISTS SECURITIES HOLDINGS REPORTED
ON THE FORM 13F FILED ON MAY 15, 2000
PURSUANT TO A REQUEST FOR
CONFIDENTIAL TREATMENT AND FOR WHICH
THAT REQUEST
EXPIRED ON AUGUST 14, 2000
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form 13F
FORM 13F COVER PAGE
Report for the Calendar Year or Quarter Ended: March 31, 2000
Check here if Amendment [ X ]; Amendment Number: 1
This Amendment (Check only one.): [ ] is a restatement.
[X] adds new holdings entries.
Institutional Investment Manager Filing this Report:
Name: Chesapeake Partners Management Co., Inc.
Address: 1829 Reisterstown Road
Suite 220
Baltimore, Maryland 21208
Form 13F File Number: 28-4120
The institutional investment manager filing this report and the person by whom
it is signed hereby represent that the person signing the report is authorized
to submit it, that all information contained herein is true, correct and
complete, and that it is understood that all required items, statements,
schedules, lists, and tables, are considered integral parts of this form.
Person Signing this Report on Behalf of Reporting Manager:
Name: Mark D. Lerner
Title: Vice President
Phone: (410) 602-0195
Signature, Place, and Date of Signing:
/s/ Mark D. Lerner Baltimore, Maryland 8/14/00
------------------ ------------------- -------
Report Type (Check only one.):
[X] 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager
are reported in this report.)
[ ] 13F NOTICE. (Check here if no holdings reported are in this report, and
all holdings are reported by other reporting manager(s).)
[ ] 13F COMBINATION REPORT. (Check here if a portion of the holdings for
this reporting manager are reported in this report and a portion are
reported by other reporting manager(s).)
<PAGE>
FORM 13F SUMMARY PAGE
Report Summary:
Number of Other Included Managers: 0
-----------------------------
Form 13F Information Table Entry Total: 26
------------------------------
Form 13F Information Table Value Total: $441,823
-----------------------------
(thousands)
List of Other Included Managers:
Provide a numbered list of name(s) and Form 13F file number(s) of all
institutional investment managers with respect to which this report is filed,
other than the manager filing this report.
[If there are no entries in this list, state "NONE" and omit the column headings
and list entries.]
None
<PAGE>
FORM 13F INFORMATION TABLE
<TABLE>
<CAPTION>
COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7
--------------------- -------- ---------- -------- ----------------------- ---------- --------
TITLE OF VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER
NAME OF ISSUER CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGERS
--------------------- -------- ---------- -------- ----------------------- ---------- --------
<S> <C> <C> <C> <C> <C> <C> <C> <C>
Aspect Development Common 045234101 605 9,400 SH SOLE
------------------------------------------------------------------------------------------------------------------------
Alcatel Asthom Common 013904305 4,500 102,700 SH SOLE
------------------------------------------------------------------------------------------------------------------------
Concentric Network Common 20589R107 39,568 701,100 SH SOLE
------------------------------------------------------------------------------------------------------------------------
Cordant Common 218412104 23,100 408,400 SH SOLE
------------------------------------------------------------------------------------------------------------------------
Etek Dynamics Common 26922C103 1,647 7,000 SH SOLE
------------------------------------------------------------------------------------------------------------------------
Foamex, Inc. Common 344123104 1,397 148,000 SH SOLE
------------------------------------------------------------------------------------------------------------------------
General Motors Common 370442105 7,867 95,000 SH SOLE
------------------------------------------------------------------------------------------------------------------------
Hannaford Brothers Common 410550107 57,673 782,000 SH SOLE
------------------------------------------------------------------------------------------------------------------------
Hayes Lemmerz Common 420781106 1,182 61,800 SH SOLE
------------------------------------------------------------------------------------------------------------------------
Howmet Int'l Common 443208103 2,253 111,600 SH SOLE
------------------------------------------------------------------------------------------------------------------------
IPC Communications Common 44980K206 56,753 275,500 SH SOLE
------------------------------------------------------------------------------------------------------------------------
IRI International Common 45004F107 472 50,000 SH SOLE
------------------------------------------------------------------------------------------------------------------------
IXNET, Inc. Common 46601C109 4,129 90,000 SH SOLE
------------------------------------------------------------------------------------------------------------------------
Media One Common 58440J104 99,282 1,225,700 SH SOLE
------------------------------------------------------------------------------------------------------------------------
Metamor Worldwide Common 59133P101 4,672 165,000 SH SOLE
------------------------------------------------------------------------------------------------------------------------
<CAPTION>
COLUMN 1 COLUMN 8
--------------------- -------------------------------
VOTING AUTHORITY
NAME OF ISSUER SOLE SHARED NONE
--------------------- -------------------------------
<S> <C> <C> <C>
Aspect Development SOLE
--------------------------------------------------------------
Alcatel Asthom SOLE
--------------------------------------------------------------
Concentric Network SOLE
--------------------------------------------------------------
Cordant SOLE
--------------------------------------------------------------
Etek Dynamics SOLE
--------------------------------------------------------------
Foamex, Inc. SOLE
--------------------------------------------------------------
General Motors SOLE
--------------------------------------------------------------
Hannaford Brothers SOLE
--------------------------------------------------------------
Hayes Lemmerz SOLE
--------------------------------------------------------------
Howmet Int'l SOLE
--------------------------------------------------------------
IPC Communications SOLE
--------------------------------------------------------------
IRI International SOLE
--------------------------------------------------------------
IXNET, Inc. SOLE
--------------------------------------------------------------
Media One SOLE
--------------------------------------------------------------
Metamor Worldwide SOLE
--------------------------------------------------------------
</TABLE>
<PAGE>
FORM 13F INFORMATION TABLE
<TABLE>
<CAPTION>
COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7
--------------------- -------- ---------- -------- ----------------------- ---------- --------
TITLE OF VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER
NAME OF ISSUER CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGERS
--------------------- -------- ---------- -------- ----------------------- ---------- --------
<S> <C> <C> <C> <C> <C> <C> <C> <C>
Mirage Resorts Common 60462E104 2,325 120,000 SH SOLE
----------------------------------------------------------------------------------------------------------------------
Mirage Resorts Common 60462E104 1,938 100,000 SH CALL SOLE
----------------------------------------------------------------------------------------------------------------------
Newbridge Networks Common 650901101 16,676 514,100 SH SOLE
----------------------------------------------------------------------------------------------------------------------
SFX Entertainment Common 784178105 1,224 30,000 SH SOLE
----------------------------------------------------------------------------------------------------------------------
Tele Sudeste
Celular Part SA Common 879252104 23,800 476,600 SH SOLE
----------------------------------------------------------------------------------------------------------------------
Telecomunicacoes
De Sao Paul Common 87929A102 14,992 505,000 SH SOLE
----------------------------------------------------------------------------------------------------------------------
Telefonica De
Argentina SA Common 879382208 12,560 320,000 SH SOLE
----------------------------------------------------------------------------------------------------------------------
Tribune Common 896047107 1,828 50,000 SH CALL SOLE
----------------------------------------------------------------------------------------------------------------------
United Water Common 913190104 5,981 172,100 SH SOLE
----------------------------------------------------------------------------------------------------------------------
Warner Lambert Common 934488107 52,468 537,100 SH SOLE
----------------------------------------------------------------------------------------------------------------------
Warner Lambert Common 934488107 2,931 30,000 SH CALL SOLE
----------------------------------------------------------------------------------------------------------------------
<CAPTION>
COLUMN 1 COLUMN 8
--------------------- -------------------------------
VOTING AUTHORITY
NAME OF ISSUER SOLE SHARED NONE
--------------------- -------------------------------
<S> <C> <C> <C>
Mirage Resorts SOLE
------------------------------------------------------------
Mirage Resorts NONE
------------------------------------------------------------
Newbridge Networks SOLE
------------------------------------------------------------
SFX Entertainment SOLE
------------------------------------------------------------
Tele Sudeste
Celular Part SA SOLE
------------------------------------------------------------
Telecomunicacoes
De Sao Paul SOLE
------------------------------------------------------------
Telefonica De
Argentina SA SOLE
------------------------------------------------------------
Tribune NONE
------------------------------------------------------------
United Water SOLE
------------------------------------------------------------
Warner Lambert SOLE
------------------------------------------------------------
Warner Lambert NONE
------------------------------------------------------------
</TABLE>
<PAGE>
212-326-3417
[email protected]
JP638749:gjss
729522-010001 August 14, 2000
VIA EDGAR
Office of the Secretary
Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, DC 20549-0609
Re: Chesapeake Partners Management Co., Inc.
Ladies and Gentlemen:
On behalf of Chesapeake Partners Management Co., Inc. (the
"Company"), attached for filing in accordance with Section 13(f) of the
Securities Exchange Act of 1934 (the "Exchange Act") please find Amendment No.
1 to the Company's Form 13F for the quarterly period ended March 31, 2000.
In accordance with Rule 24b-2 of the Exchange Act, we have
separately submitted a request for an extension of the confidential treatment
of certain securities holdings of the Company previously requested.
Please contact the undersigned with any comments or questions.
Very truly yours,
David M. Mahle
Attachment
cc: Ms. Melody Burrill
