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: 1926
Merrill Lynch & Co., Inc.
Medium-Term Notes, Series B
Due Nine Months or More from Date of Issue
Fixed Rate Notes
Principal Amount: $100,000,000
CUSIP Number: 59018S 5A8
Interest Rate: 7.14000%
Original Issue Date: March 21, 2000
Stated Maturity Date: March 21, 2002
Interest Payment Dates: Each March 21st and September 21st,
commencing on September 21, 2000, 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: March 16, 2000
