AMENDMENT NO. 4
DATED AS OF FEBRUARY 1, 2000
LOAN AND SECURITY AGREEMENT
THIS AMENDMENT NO. 4 dated as of February 1, 2000 (this "Amendment") is made between Nabi, a
Delaware corporation (the "Borrower"), the financial institutions party from time to time to the Loan Agreement
referred to below (the "Lenders"), and Bank of America, N.A., formerly NationsBank, N.A., a national banking
association, as agent for the Lenders (in that capacity, together with any successors in that capacity, the "Agent").
The Borrower, the Lenders and the Agent are parties to a Loan and Security Agreement dated as of September
12, 1997, as amended by Amendment No. 1 and Waiver dated November 14, 1997, Amendment No. 2 and
Waiver dated March 30, 1998 and Amendment No. 3 and Waiver dated as of March 1, 1999 (the "Loan
Agreement"; unless otherwise defined herein, terms are used herein as defined in the Loan Agreement).
The Borrower has requested that the Lenders modify certain financial covenants, adjust the amortization of the
Term Loan and amend certain other provisions of the Loan Agreement, and the Lenders have agreed, upon and
subject to the terms, conditions and provisions of this Amendment.
STATEMENT OF AGREEMENT
NOW, THEREFORE, in consideration of the Loan Agreement, the Loans made by the Lenders and outstanding
thereunder, the mutual promises hereinafter set forth and other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto hereby agree as follows:
Section 1. AMENDMENT TO LOAN AGREEMENT. The Loan Agreement is hereby amended, subject to the
provisions of Section 2 of this Amendment,
(a) by amending Section 2B.3 REPAYMENT OF TERM LOAN in its entirety to read as follows:
SECTION 2B.3. REPAYMENT OF TERM LOAN. Subject to the provisions of this Agreement, the
outstanding principal amount of the Term Loan is due and payable, and shall be repaid in full by the Borrower, in
consecutive monthly instal