<PAGE>
As filed with the Securities and Exchange Commission on January 10, 2000
Registration No. 333-90517
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
POST EFFECTIVE AMENDMENT NO. 1 TO
FORM S-8
REGISTRATION STATEMENT UNDER
THE SECURITIES ACT OF 1933
LEUKOSITE, INC.
(Exact Name of Registrant as Specified in Its Charter)
DELAWARE
(State or Other Jurisdiction of 04-3173859
Incorporation or Organization (I.R.S. Employer Identification No.)
75 SIDNEY STREET, CAMBRIDGE MASSACHUSETTS 02139
(Address of Principal Executive Offices) (Zip Code)
LEUKOSITE, INC. AMENDED AND RESTATED 1993 STOCK OPTION PLAN
(Full Title of the Plan)
JOHN MARAGANORE
PRESIDENT
LEUKOSITE, INC.
75 SIDNEY STREET
CAMBRIDGE, MA 02139
(Name and Address of Agent For Service)
(617) 679-7000
(Telephone Number, Including Area Code, of Agent For Service)
Copy to:
David E. Redlick, Esq.
Jeffrey A. Stein, Esq.
Hale and Dorr, LLP
60 State Street
Boston, MA 02109
<PAGE>
DEREGISTRATION OF COMMON STOCK
On November 8, 1999, LeukoSite, Inc. (the "Company") filed a
Registration Statement on Form S-8, Registration No. 333-90517 (the
"Registration Statement"), for the sale of 450,000 shares of common stock, par
value $0.01 per share of the Company (the "Shares") under the Company's Amended
and Restated 1993 Stock Option Plan (the "Plan"). On December 22, 1999, the
stockholders of the Company approved and adopted an Agreement and Plan of
Merger, dated as of October 14, 1999, by and among the Company, Millennium
Pharmaceuticals, Inc. and ANM, Inc., a wholly-owned subsidiary of Millennium.
Pursuant to the merger agreement, Millennium assumed the obligations of the
Company under the Plan and the Plan was terminated. This Post-Effective
Amendment No. 1 to the Registration Statement is being filed to deregister all
of the unsold shares of common stock formerly issuable under the plan,
constituting 129,279 shares.
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<PAGE>
SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, as amended,
the Registrant certifies that it has reasonable grounds to believe that it meets
all of the requirements for filing on Form S-8 and has duly caused this
Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Cambridge, Commonwealth of Massachusetts, on
this 10th day of January, 2000.
LEUKOSITE, INC.
By: /s/ John Maraganore
-------------------------
John Maraganore
Pursuant to the requirements of the Securities Act of 1933, as amended,
this Registration Statement has been signed below by the following persons in
the capacities and on the date indicated.
<TABLE>
<CAPTION>
Signature Title Date
--------- ----- ----
<S> <C> <C>
/s/ John Maraganore Chairman of the Board and January 10, 2000
- ------------------------
John Maraganore President (Principal Executive
Officer)
/s/ Kevin P. Starr Director (Principal Financial and January 10, 2000
- ------------------------
Kevin P. Starr Accounting Officer)
/s/ Mark J. Levin Director January 10, 2000
- ------------------------
Mark J. Levin
</TABLE>
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