<PAGE>
FILED PURSUANT TO RULE 424(B)(3)
REGISTRATION STATEMENT NO. 333-41133
AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON AUGUST 3, 1998
PROSPECTUS SUPPLEMENT NO. 1 REGISTRATION STATEMENT NO. 333-41133
(TO PROSPECTUS DATED DECEMBER 4, 1997)
5,592,000 SHARES
INTERLEAF, INC.
COMMON STOCK
This Prospectus Supplement supplements information contained in a Prospectus
dated December 4, 1997 of Interleaf, Inc. (the "Company") relating to the shares
of Common Stock issuable upon conversion of the Series 6% Convertible Preferred
Stock, $.10 par value per share, held by the Selling Shareholders. This
Prospectus Supplement is not complete without, and may not be delivered or
utilized except in connection with, the Prospectus, including any amendments or
supplements thereto. Capitalized terms used herein but not defined have the
meanings assigned to such terms in the Prospectus.
The following table supplements the information set forth in the Prospectus
under the caption "Selling Shareholders" with respect to the Selling Shareholder
named below and shares beneficially owned by such Selling Shareholder that may
be offered pursuant to the Prospectus:
<TABLE>
<CAPTION>
NUMBER OF SHARES OF COMMON
NAME OF SELLING NUMBER OF SHARES OF COMMON NUMBER OF SHARES OF COMMON STOCK OWNED AFTER THE
SHAREHOLDER STOCK BENEFICIALLY OWNED STOCK BEING OFFERED OFFERING
- ------------------------- --------------------------- --------------------------- ---------------------------------
<S> <C> <C> <C>
Crisostomo B. Garcia
Trust (1).............. 150,000 150,000 -0-
</TABLE>
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(1) The shares of Common Stock issuable upon conversion of the 6% Convertible
Preferred Stock held by the Crisostomo B. Garcia Trust (the "Trust") were
registered under the Company's Registration Statement on Form S-3 filed on
November 26, 1997 (the "Registration Statement"). However, the name of the
Trust was inadvertently not included in the Selling Shareholders list in the
Prospectus included in the Registration Statement.
THIS DATE OF THIS PROSPECTUS SUPPLEMENT IS AUGUST 3, 1998.
