<PAGE>
PROSPECTUS DATED MARCH 12, 1999 PRICING SUPPLEMENT NO. 6 TO
PROSPECTUS SUPPLEMENT REGISTRATION STATEMENT NO. 333-73405
DATED APRIL 15, 1999 MAY 18, 1999
RULE 424(b)(3)
DONALDSON, LUFKIN & JENRETTE, INC.
MEDIUM-TERM NOTES
DUE NINE MONTHS OR MORE FROM DATE OF ISSUE
The Medium-Term Notes, as further described below and in the Prospectus
Supplement under Description Notes, will bear interest from the date of
issuance until the principal amount thereof is paid or made available for
payment at the rate set forth below:
<TABLE>
<CAPTION>
<S> <C> <C> <C>
Principal Amount: $100,000,000 Optional Conversion: N/A
Price To Public: 100.00% Notice Date: N/A
Underwriting Discount: 0.15%
Proceeds To Issuer: 99.85% Conversion Date: N/A
Settlement Date May 20, 1999 Interest Rate: N/A
(Original Issue Date):
Specified Currency: US Dollars Day Count: N/A
Authorized Denomination: $1,000 Interest Payment Dates: N/A
Maturity Date: June 16, 2000 First Payment: N/A
Interest Rate: 5.73% Optional Repayment Date: Non-Call/Life
First Coupon:
Last Coupon: Initial Redemption Date: N/A
Day Count: ACT/360 Initial Redemption N/A
Percentage:
Interest Payment Dates: At Maturity Annual Redemption N/A
Percentage Reduction:
Interest Determination N/A Book Entry Note or B/E
Date: Certificated Note:
First Payment: At Maturity Total Amount of OID: N/A
CUSIP: 25766CBA1
</TABLE>
Capitalized terms not defined above have the meanings given to such terms in
the accompanying Prospectus Supplement.
DONALDSON, LUFKIN & JENRETTE
SECURITIES CORPORATION
