CERTIFICATIONS PURSUANT TO SECTION 906 EX-99.906CERT CERTIFICATION R. Jay Gerken, Chief Executive Officer, and Lewis E. Daidone, Chief Administrative Officer Smith Barney Multiple Discipline Trust: Multiple Discipline Portfolio - All Cap Growth and Value (the "Registrant"), each certify to the best of his or her knowledge that: 1. The Registrant's periodic report on Form N-CSR for the period ended June 30, 2003 (the "Form N-CSR") fully complies with the requirements of section 15(d) of the Securities Exchange Act of 1934, as amended; and 2. The information contained in the Form N-CSR fairly presents, in all material respects, the financial condition and results of operations of the Registrant. Chief Executive Officer Chief Administrative Officer Smith Barney Multiple Discipline Smith Barney Multiple Discipline Trust - Multiple Discipline Portfolio - Trust - Multiple Discipline Portfolio - All Cap Growth and Value All Cap Growth and Value /s/ R. Jay Gerken /s/ Lewis E. Daidone - --------------------------- ----------------------------------- R. Jay Gerken Lewis E. Daidone Date: September 2, 2003 Date: September 2, 2003 This certification is being furnished to the Securities and Exchange Commission solely pursuant to 18 U.S.C. (S) 1350 and is not being filed as part of the Form N-CSR with the Commission. CERTIFICATIONS PURSUANT TO SECTION 906 EX-99.906CERT CERTIFICATION R. Jay Gerken, Chief Executive Officer, and Lewis E. Daidone, Chief Administrative Officer Smith Barney Multiple Discipline Trust: Multiple Discipline Portfolio - Large Cap Growth and Value (the "Registrant"), each certify to the best of his or her knowledge that: 1. The Registrant's periodic report on Form N-CSR for the period ended June 30, 2003 (the "Form N-CSR") fully complies with the requirements of section 15(d) of the Securities Exchange Act of 1934, as amended; and 2. The information contained in the Form N-CSR fairly presents, in all material respects, the financial condition and results of operations of the Registrant. Chief Executive Officer Chief Administrative Officer Smith Barney Multiple Discipline Smith Barney Multiple Discipline Trust - Multiple Discipline Portfolio - Trust - Multiple Discipline Portfolio - Large Cap Growth and Value Large Cap Growth and Value /s/ R. Jay Gerken /s/ Lewis E. Daidone - --------------------------- ----------------------------------- R. Jay Gerken Lewis E. Daidone Date: September 2, 2003 Date: September 2, 2003 This certification is being furnished to the Securities and Exchange Commission solely pursuant to 18 U.S.C. (S) 1350 and is not being filed as part of the Form N-CSR with the Commission. CERTIFICATIONS PURSUANT TO SECTION 906 EX-99.906CERT CERTIFICATION R. Jay Gerken, Chief Executive Officer, and Lewis E. Daidone, Chief Administrative Officer Smith Barney Multiple Discipline Trust: Multiple Discipline Portfolio - Global All Cap Growth and Value (the "Registrant"), each certify to the best of his or her knowledge that: 1. The Registrant's periodic report on Form N-CSR for the period ended June 30, 2003 (the "Form N-CSR") fully complies with the requirements of section 15(d) of the Securities Exchange Act of 1934, as amended; and 2. The information contained in the Form N-CSR fairly presents, in all material respects, the financial condition and results of operations of the Registrant. Chief Executive Officer Chief Administrative Officer Smith Barney Multiple Discipline Smith Barney Multiple Discipline Trust - Multiple Discipline Portfolio - Trust - Multiple Discipline Portfolio - Global All Cap Growth and Value Global All Cap Growth and Value /s/ R. Jay Gerken /s/ Lewis E. Daidone - --------------------------- ----------------------------------- R. Jay Gerken Lewis E. Daidone Date: September 2, 2003 Date: September 2, 2003 This certification is being furnished to the Securities and Exchange Commission solely pursuant to 18 U.S.C. (S) 1350 and is not being filed as part of the Form N-CSR with the Commission. CERTIFICATIONS PURSUANT TO SECTION 906 EX-99.906CERT CERTIFICATION R. Jay Gerken, Chief Executive Officer, and Lewis E. Daidone, Chief Administrative Officer Smith Barney Multiple Discipline Trust: Multiple Discipline Portfolio - Balanced All Cap Growth and Value (the "Registrant"), each certify to the best of his or her knowledge that: 1. The Registrant's periodic report on Form N-CSR for the period ended June 30, 2003 (the "Form N-CSR") fully complies with the requirements of section 15(d) of the Securities Exchange Act of 1934, as amended; and 2. The information contained in the Form N-CSR fairly presents, in all material respects, the financial condition and results of operations of the Registrant. Chief Executive Officer Chief Administrative Officer Smith Barney Multiple Discipline Smith Barney Multiple Discipline Trust - Multiple Discipline Portfolio - Trust - Multiple Discipline Portfolio - Balanced All Cap Growth and Value Balanced All Cap Growth and Value /s/ R. Jay Gerken /s/ Lewis E. Daidone - --------------------------- ----------------------------------- R. Jay Gerken Lewis E. Daidone Date: September 2, 2003 Date: September 2, 2003 This certification is being furnished to the Securities and Exchange Commission solely pursuant to 18 U.S.C. (S) 1350 and is not being filed as part of the Form N-CSR with the Commission.