PROSPECTUS Dated May 5, 1999 Pricing Supplement No. 4 to
PROSPECTUS SUPPLEMENT Registration Statement No. 333-75289
Dated May 6, 1999 May 13, 1999
Rule 424(b)(3)
Morgan Stanley Dean Witter & Co.
MEDIUM-TERM NOTES, SERIES C
Senior Floating Rate Notes
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We will not redeem these Medium-Term Notes, Series C (Senior
Floating Rate Notes) prior to the maturity date. We describe the basic
features of this type of note in the section called "Description of
Notes--Floating Rate Notes" in the accompanying prospectus supplement, subject
to and as modified by the provisions described below.
Principal Amount: $155,000,000
Maturity Date: May 20, 2002
Interest Accrual Date: May 18, 1999
Interest Payment Dates: Each February 20, May 20, August 20 and November 20,
commencing August 20, 1999
Initial Interest Rate: To be determined two London banking days prior to the
Original Issue Date
Base Rate: LIBOR
Index Maturity: 3 Months
Spread (Plus or Minus): Plus 0.16% per annum
Index Currency: U.S. Dollars
Interest Payment Period: Quarterly
Specified Currency: U.S. Dollars
Issue Price: 100%
Settlement Date
(Original Issue Date): May 18, 1999
Initial Interest Reset
Date: August 20, 1999
Interest Reset Dates: Same as Interest Payment Dates
Interest Reset Period: Quarterly
Interest Determination
Dates: Two London banking days prior to each
Interest Reset Date
Reporting Service: Telerate (Page 3750)
Book Entry Note or
Certificated Note: Book Entry Note
Senior Note or
Subordinated Note: Senior Note
Agent: Morgan Stanley & Co. Incorporated
Calculation Agent: The Chase Manhattan Bank
Minimum Denomination: $1,000
CUSIP: 61745ENS6
Terms not defined above have the meanings given to such terms in the
accompanying prospectus supplement.
MORGAN STANLEY DEAN WITTER
