<PAGE>
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SCHEDULE 14D-1*
(AMENDMENT NO. 3)
Tender Offer Statement Pursuant to Section 14(d)(1) of the Securities Exchange
Act of 1934
SCHEDULE 13D**
(AMENDMENT NO. 1)
Under the Securities Exchange Act of 1934
PLENUM PUBLISHING CORPORATION
(Name of Subject Company)
PPC ACQUISITION CORP.
KLUWER BOSTON, INC.
WOLTERS KLUWER U.S. CORPORATION
WOLTERS KLUWER NV
(Bidders)
COMMON STOCK, $.10 PAR VALUE PER SHARE
(Title of Class of Securities)
729093104 (COMMON STOCK)
(CUSIP Number of Class of Securities)
MR. JEFFREY K. SMITH
C/O KLUWER ACADEMIC PUBLISHERS B.V.
SPUIBOULEVARD 50
3300 AZ DORDRECHT
THE NETHERLANDS
TELEPHONE (011) 31 78 6392283
(Name, Address and Telephone Number of Person Authorized to Receive Notices and
Communications on Behalf of Bidders)
COPY TO:
Arnold J. Schaab, Esq.
Pryor Cashman Sherman & Flynn LLP
410 Park Avenue
New York, New York 10022
Telephone (212) 326-0168
- ------------------------
* Constituting the final amendment to Schedule 14D-1
** This Amendment No. 3 to Schedule 14D-1 also constitutes Amendment No. 1 to
the Statement on Schedule 13D of PPC Acquisition Corp., Kluwer Boston, Inc.,
Wolters Kluwer U.S. Corporation and Wolters Kluwer nv filed with respect to
the shares of Common Stock, par value $.10 per share, of Plenum Publishing
Corporation beneficially owned by PPC Acquisition Corp., Kluwer Boston,
Inc., Wolters Kluwer U.S. Corporation and Wolters Kluwer nv.
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
This Amendment No. 3 amends the Tender Offer Statement on Schedule 14D-1 of
PPC Acquisition Corp., a Delaware corporation (the "Offeror"), Kluwer Boston,
Inc., a Massachusetts corporation (the "Parent"), Wolters Kluwer U.S.
Corporation, a Delaware corporation ("WKUS"), and Wolters Kluwer nv, a
corporation organized under the laws of the Netherlands ("Wolters Kluwer"),
filed with the Securities and Exchange Commission on June 16, 1998, as
previously amended, relating to the tender offer (the "Offer") for all
outstanding shares of common stock (the "Shares"), par value $.10 per share of
Plenum Publishing Corporation, a Delaware corporation (the "Company"). This
Amendment No. 3, which constitutes the final amendment to the Tender Offer
Statement on Schedule 14D-1, also constitutes Amendment No. 1 to the Statement
on Schedule 13D of the Offeror, Parent, WKUS and Wolters Kluwer with respect to
the Shares beneficially owned by the Offeror, Parent, WKUS and Wolters Kluwer.
ITEM 6. INTEREST IN SECURITIES OF SUBJECT COMPANY
Item 6 is hereby amended to add the following information:
Immediately following the expiration of the Offer on July 15, 1998, the
Offeror accepted for payment a total of 3,341,152 shares of common stock of the
Company, representing approximately 95% of the Shares.
ITEM 10. ADDITIONAL INFORMATION
Item 10(f) is hereby amended to add the following information:
The Offer terminated at Midnight, New York City Time, on Wednesday, July 15,
1998.
2
<PAGE>
SIGNATURE
After due inquiry and to the best of my knowledge and belief, I certify that
the information set forth in this statement is true, complete and correct.
<TABLE>
<S> <C> <C>
Dated: July 21, 1998 PPC Acquisition Corp.
By: /s/ JEFFREY K. SMITH
------------------------------------------
Name: Jeffrey K. Smith
Title: President
</TABLE>
<PAGE>
SIGNATURE
After due inquiry and to the best of my knowledge and belief, I certify that
the information set forth in this statement is true, complete and correct.
<TABLE>
<S> <C> <C>
Dated: July 21, 1998 Kluwer Boston, Inc.
By: /s/ JEFFREY K. SMITH
------------------------------------------
Name: Jeffrey K. Smith
Title: President
</TABLE>
<PAGE>
SIGNATURE
After due inquiry and to the best of my knowledge and belief, I certify that
the information set forth in this statement is true, complete and correct.
<TABLE>
<S> <C> <C>
Dated: July 21, 1998 Wolters Kluwer U.S. Corporation
By: /s/ PETER W. VAN WEL
------------------------------------------
Name: Peter W. van Wel
Title: President and CEO
</TABLE>
<PAGE>
SIGNATURE
After due inquiry and to the best of my knowledge and belief, I certify that
the information set forth in this statement is true, complete and correct.
<TABLE>
<S> <C> <C>
Dated: July 21, 1998 Wolters Kluwer nv
By: /s/ PETER W. VAN WEL
------------------------------------------
Name: Peter W. van Wel
Title: Member, Executive Board
</TABLE>
