PROSPECTUS SUPPLEMENT File No. 333-38792 (To Prospectus Supplement and Prospectus dated June 16, 2000 Rule 424(b)(3) and June 15, 2000, respectively) Prospectus number: 1986 Merrill Lynch & Co., Inc. Medium Term Notes, Series B Due Nine Months or More from Date of Issue 7% Capped Appreciation Note Linked to the Performance of Common Stock of The GAP Inc. Principal Amount: $29,500,000 CUSIP Number: 59018YAA9 Interest Rate: 7.00000% Original Issue Date: July 7, 2000 Stated Maturity Date: July 8, 2002 Interest Payment Dates: 7th day of January and July commencing January 7, 2001 through the Stated Maturity Date, subject to the 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 Other Provisions: At maturity, the investor receives the Exchange Ratio multiplied by the lesser of: (i) the average closing price of the Underlying Equity for the five business days ending 3 Trading Days before maturity; and (ii) the Appreciation Cap. Form: The Notes are being issued in fully registered book-entry form. Trustee: The Chase Manhattan Bank