Supplement, dated October 31, 2006, to the
                         Prospectus, dated May 1, 2006,
                   for Seligman Portfolios, Inc. (the "Fund")
                                on behalf of its
                Seligman Common Stock Portfolio (the "Portfolio")

Capitalized  terms  used  but not  defined  in this  Supplement  shall  have the
meanings given to such terms in the Fund's Prospectus.

The second and third  paragraphs  under the caption  entitled  "Seligman  Common
Stock Portfolio - Portfolio  Management" on page 11 of the Fund's Prospectus are
hereby deleted in their  entirety.  As of such date, the Portfolio will continue
to be  managed  by  Seligman's  Core  Investment  Team,  headed  by Mr.  John B.
Cunningham, Portfolio Manager of the Portfolio.

The following information supersedes and replaces the fourth paragraph under the
caption  entitled  "Seligman  Common Stock Portfolio - Portfolio  Management" on
page 11 of the Fund's Prospectus:

The Fund's Statement of Additional  Information provides additional  information
about the  Portfolio  Manager's  compensation,  other  accounts  managed  by the
Portfolio Manager,  and the Portfolio  Manager's  ownership of securities of the
Portfolio.



                   Supplement, dated October 31, 2006, to the
             Statement of Additional Information, dated May 1, 2006,
                   for Seligman Portfolios, Inc. (the "Fund")
                                on behalf of its
                Seligman Common Stock Portfolio (the "Portfolio")

Capitalized  terms  used  but not  defined  in this  Supplement  shall  have the
meanings given to such terms in the Fund's Statement of Additional  Information,
dated May 1, 2006 ("SAI").

The biography under the caption  "Management of the Fund - INTERESTED  DIRECTORS
AND PRINCIPAL OFFICERS" on page 16 of the SAI relating to Mr. Michael F. McGarry
is hereby deleted in its entirety.

The information  relating to Mr. Michael F. McGarry  contained under the caption
"Portfolio  Managers - Seligman Common Stock Portfolio" on page 31 of the SAI is
hereby deleted in its entirety.