PROSPECTUS SUPPLEMENT File No. 333-68747
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(To Prospectus and Prospectus Supplement dated May 6, 1999) Rule 424(b)(3)
Prospectus number: 1909
Merrill Lynch & Co., Inc.
Medium Term Notes, Series B
Due Nine Months or More from Date of Issue
Floating Rate Notes
Principal Amount: $626,000,000
CUSIP Number: 59018S 4H4
Original Issue Date: March 2, 2000
Stated Maturity Date: March 6, 2001
Interest Calculation: Day Count Convention:
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[x] Regular Floating Rate Note [x] Actual/360
[_] Inverse Floating Rate Note [_] 30/360
(Fixed Interest Rate):
[_] Actual/Actual
Interest Rate Basis:
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[x] LIBOR [_] Commercial Paper Rate
[_] CMT Rate [_] Eleventh District Cost of Funds Rate
[_] Prime Rate [_] CD Rate
[_] Federal Funds Rate [_] Other (see attached)
[_] Treasury Rate
Designated CMT Page: Designated LIBOR Page:
CMT Telerate Page: LIBOR Telerate Page: 3750
CMT Reuters Page: LIBOR Reuters Page:
Index Maturity: One Month Minimum Interest Rate: Not Applicable
Spread: -0.040% Maximum Interest Rate: Not Applicable
Initial Interest Rate: TBD Spread Multiplier: Not Applicable
Interest Reset Dates: Monthly, on the 6th, commencing April 6, 2000; subject
to modified following business day convention.
Interest Payment Dates: Monthly, on the 6th, commencing April 6, 2000, long
first coupon; subject to modified following business
day convention.
Repayment at the
Option of the Holder: The Notes cannot be repaid prior to the Stated Maturity
Date.
Redemption at the
Option of the Company: The Notes cannot be redeemed prior to the Stated
Maturity Date.
Form: The Notes are being issued in fully registered
book-entry form.
Trustee: The Chase Manhattan Bank
Dated: February 28, 2000
