EX.99. (906) CERT

Certification Pursuant to Section 906 of the Sarbanes-Oxley Act

     Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, each of the undersigned officers of the Kinetics Mutual Funds, Inc. & Kinetics Portfolios Trust (each, the “Registrant”), does hereby certify, to such officer’s knowledge, that the Registrant’s report on Form N-CSR for the period ended June 30, 2006 fully complies with the requirements of Section 15(d) of the Securities Exchange Act of 1934, as amended, and that the information contained in the Form N-CSR fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

/s/ Peter B. Doyle	/s/ Leonid Polyakov
Peter B. Doyle	Leonid Polyakov
President, Kinetics Mutual Funds, Inc. & Kinetics	Treasurer, Kinetics Mutual Funds, Inc. & Kinetics
Portfolios Trust	Portfolios Trust

Dated: 09/07/06

This certification is being furnished to the Securities and Exchange Commission pursuant to Rule 30a-2(b) under the Investment Company Act of 1940, as amended, and 18 U.S.C. Section 1350 and is not being filed as part of the Form N-CSR with the Securities and Exchange Commission.