Supplement, dated November 11, 2008 to the
                       Prospectus, dated May 1, 2008, for
                           Tri-Continental Corporation
                               (the "Corporation")


Effective November 11, 2008, this prospectus  supplement dated November 11, 2008
supersedes and replaces the prospectus supplement dated November 7, 2008.

On November 7, 2008, RiverSource Investments, LLC ("RiverSource Investments"), a
wholly owned subsidiary of Ameriprise Financial,  Inc., announced the closing of
its  acquisition  (the  "Acquisition")  of J. & W.  Seligman & Co.  Incorporated
("Seligman"). With the Acquisition completed and stockholders of the Corporation
having previously  approved (at a Special Meeting held on October 7, 2008) a new
investment management services agreement between the Corporation and RiverSource
Investments,  RiverSource  Investments  is the  new  investment  manager  of the
Corporation effective November 7, 2008.

As a result of the Acquisition,  the Corporation's  portfolio managers have been
changed.  The Corporation's new portfolio managers are named below. In addition,
effective November 7, 2008, the fee structure (i.e.,  breakpoint schedule) under
which  the  Corporation  paid  management  fees  has been  eliminated.  Instead,
effective  November 7, 2008, the Corporation  will pay a management fee equal to
an annual rate of 0.40% of the Corporation's average daily net assets.

Effective  November  7, 2008,  the  following  changes  are  hereby  made to the
Corporation's prospectus:

The last sentence of the second paragraph on the cover page of the Corporation's
prospectus is superseded and replaced with the following:

Effective   November  7,  2008,   the   Corporation's   manager  is  RiverSource
Investments, LLC ("RiverSource Investments"). Prior to then, the Corporation was
managed by J. & W. Seligman & Co. Incorporated ("Seligman").

Effective  November 7, 2008,  the  reference to the  "Manager" in the first full
paragraph under the caption "Prospectus  Summary" is hereby changed from J. & W.
Seligman & Co.  Incorporated to RiverSource  Investments,  LLC. The reference to
the  "Manager"  throughout  the  section  entitled  "Regulatory  Matters"  shall
continue to mean J. & W. Seligman & Co. Incorporated.

The second  full  paragraph  under the  caption  "Prospectus  Summary" is hereby
superseded and replaced with the following:

RiverSource  Investments manages the investment of the assets of the Corporation
pursuant to an  investment  management  services  agreement  that was  initially
approved by the Board of Directors on July 16, 2008 and the  stockholders of the
Corporation on October 7, 2008 (the "Management Agreement").  Effective November
7, 2008,  RiverSource  Investments also serves as manager of the Seligman Mutual
Funds.

The aggregate  assets of the  RiverSource  family of funds,  excluding  Seligman
Group of Funds, as of September 30, 2008 were  approximately $70 billion.  As of
the same date,  aggregate  assets of the Seligman Group of Funds,  including the
Corporation,  were approximately $8.6 billion. Seligman also provided investment
management or advice to  institutional  and other accounts



having  a  value  as of  September  30,  2008  of  approximately  $7.6  billion.
RiverSource also provides  investment  management or advice to institutional and
other  accounts  having a value as of September  30, 2008 of  approximately  $58
billion.  The  management  fee rate for the year  ended  December  31,  2007 was
equivalent to 0.41% of the  Corporation's  average daily net investment  assets.
Effective  November 7, 2008, the Corporation will pay RiverSource  Investments a
fee for managing its assets  (Seligman  will no longer  receive a management fee
effective  November 7, 2008).  The fee paid to RiverSource  Investments  will be
equal to an annual rate of 0.40% of the Corporation's  average daily net assets.
See "Management of the Corporation."

The fourth  full  paragraph  under the  caption  "Prospectus  Summary" is hereby
superseded and replaced with the following:

On July 16, 2008, the Corporation's  Board met to discuss,  prior to stockholder
approval,  the Management  Agreement  between the  Corporation  and  RiverSource
Investments.  A  discussion  regarding  the basis for the  Board  approving  the
Management  Agreement was included in the Corporation's  proxy statement,  dated
August 26, 2008, and will be made available in the Corporation's upcoming annual
stockholder report.

The  following  information  is  merely  added  immediately  after  the  section
"Equity-Linked Securities":

Futures  Contracts:  The  Corporation  intends  to  comply  with Rule 4.5 of the
Commodity Futures Trading Commission  (CFTC),  under which an investment company
registered as such under the  Investment  Company Act of 1940 is exempt from the
definition of a "commodity pool operator." The  Corporation,  therefore,  is not
subject to  registration  or  regulation  as a pool  operator,  meaning that the
Corporation may invest in futures contracts without registering with the CFTC.

The information under the caption  "MANAGEMENT OF THE CORPORATION - The Manager"
is hereby superseded and replaced with the following information:

On  November  7, 2008,  RiverSource  Investments  announced  the  closing of its
acquisition (the "Acquisition") of J. & W. Seligman & Co. Incorporated, 100 Park
Avenue,   New  York,  New  York  10017.  With  the  Acquisition   completed  and
stockholders having approved,  at a Special Meeting held on October 7, 2008, the
Management  Agreement  between  the  Corporation  and  RiverSource  Investments,
RiverSource  Investments  is the  new  investment  manager  of  the  Corporation
effective November 7, 2008.

RiverSource Investments, 200 Ameriprise Financial Center, Minneapolis, Minnesota
55474,  is also the investment  manager of the other funds in the Seligman Group
of  Funds,  and is a  wholly-owned  subsidiary  of  Ameriprise  Financial,  Inc.
("Ameriprise  Financial").  Ameriprise  Financial  is a financial  planning  and
financial  services company that has been offering  solutions for clients' asset
accumulation, income management and protection needs for more than 110 years. In
addition to managing  investments  for the Seligman Group of Funds,  RiverSource
Investments  manages  investments  for the  RiverSource  funds,  itself  and its
affiliates.   For  institutional  clients,   RiverSource   Investments  and  its
affiliates provide investment management and related services,  such as separate
account asset management,  and institutional trust and custody, as well as other
investment products.  For all of its clients,  RiverSource  Investments seeks to
allocate investment opportunities in an equitable manner over time.

Effective  November 7, 2008, the Corporation will pay RiverSource  Investments a
fee for managing its assets  (Seligman  will no longer  receive a management fee
effective  November 7,



2008).  The fee paid to RiverSource  Investments will be equal to an annual rate
of 0.40% of the Corporation's average daily net assets.

On July 16, 2008, the Corporation's Board met to discuss, prior to stockholder
approval, the Management Agreement between the Corporation and RiverSource
Investments. A discussion regarding the basis for the Board approving the
Management Agreement was included in the Corporation's proxy statement, dated
August 26, 2008, and will be made available in the Corporation's upcoming annual
stockholder report.

Portfolio Manager(s). Effective November 7, 2008, the portfolio managers
responsible for the Corporation's day-today management are:

Dimitris J. Bertsimas, Ph.D., Senior Portfolio Manager

o     Joined  RiverSource  Investments as a portfolio  manager and leader of the
      Disciplined Equity and Asset Allocation Team in 2002.

o     Co-founded  Dynamic Ideas,  LLC, a consulting firm that specialized in the
      development of quantitative tools for the asset management industry, where
      he served as Managing Partner, 1999 to 2002.  Currently,  Boeing Professor
      of  Operations  Research,  Sloan School of Management  and the  Operations
      Research Center, MIT.

o     Began investment  career as a consultant to asset managers in 1993; became
      portfolio manager in 2002.

o     MS and Ph.D., MIT.

Gina K. Mourtzinou, Ph.D., Portfolio Manager

o     Joined  RiverSource  Investments as a portfolio  manager and member of the
      Disciplined Equity and Asset Allocation Team in 2002.

o     Co-founded  Dynamic Ideas,  LLC, a consulting firm that specialized in the
      development of quantitative tools for the asset management industry, where
      she served as Vice President of Research and Analytics, 1999 to 2002.

o     Began investment  career as a consultant to asset managers in 1996; became
      portfolio manager in 2002.

o     Ph.D., MIT.

The SAI provides  additional  information about portfolio manager  compensation,
management of other accounts and ownership of shares in the Corporation.

The  Corporation  pays all its expenses other than those assumed by the Manager,
including  fees payable to  RiverSource  Investments  for its services under the
terms of the Management Agreement,  taxes,  brokerage commissions and charges in
connection with the purchase and sale of assets, premium on the bond required by
Rule 17g-1  under the  Investment  Company  Act of 1940,  fees and  expenses  of
attorneys  (i) it employs in matters not involving the assertion of a claim by a
third party against the  Corporation,  its Board  members and officers,  (ii) it
employs in conjunction  with a claim  asserted by the Board against  RiverSource
Investments, except that RiverSource Investments shall reimburse the Corporation
for  such  fees  and  expenses  if it is  ultimately  determined  by a court  of
competent jurisdiction,  or RiverSource Investments agrees, that it is liable in
whole or in part to the Corporation,  (iii) it employs to assert a claim against
a third party, and (iv) it or RiverSource Investments employs, with the approval
of the  Board,  to assist in the  evaluation  of  certain  investments  or other
matters  related  to the  management  of the  Corporation,  fees  paid  for  the
qualification  and  registration  for  public  sale  of  the  securities  of the
Corporation  under the laws of the United  States and of the  several  states in
which such securities



shall be offered for sale,  fees of  consultants  employed  by the  Corporation,
Board member,  officer and employee expenses which shall include fees, salaries,
memberships,  dues, travel,  seminars,  pension,  profit sharing,  and all other
benefits  paid  to or  provided  for  Board  members,  officers  and  employees,
directors  and officers  liability  insurance,  errors and  omissions  liability
insurance,  worker's compensation insurance and other expenses applicable to the
Board members,  officers and employees,  except the Corporation will not pay any
fees or  expenses  of any person who is an officer or  employee  of  RiverSource
Investments  or  its  affiliates,  filing  fees  and  charges  incurred  by  the
Corporation  in  connection  with  filing any  amendment  to its  organizational
documents,  or  incurred in filing any other  document  with the state where the
Corporation is organized or its political subdivisions,  organizational expenses
of the  Corporation,  expenses  incurred in  connection  with lending  portfolio
securities of the Corporation,  expenses properly payable by the Corporation and
approved by the Board, and other expenses payable by the Corporation pursuant to
separate agreement of the Corporation and any of its service providers.

The Management  Agreement  provides that it will become effective on November 7,
2008 and shall  continue in full force and effect  until  November 7, 2010,  and
from year to year  thereafter  if such  continuance  is  approved  in the manner
required  by the  1940  Act  (i.e.,  by a vote of a  majority  of the  Board  of
Directors or of the  outstanding  voting  securities of the Corporation and by a
vote of a majority of Directors who are not parties to the Management  Agreement
or  interested  persons of any such  party).  The  Management  Agreement  may be
terminated by either the  Corporation or RiverSource  Investments at any time by
giving the other party 60 days' written  notice of such  intention to terminate,
provided that any termination  shall be made without the payment of any penalty,
and provided  further that termination may be effected either by the Board or by
a vote of the majority of the outstanding voting shares of the Corporation.  The
Management   Agreement  will  terminate   automatically  in  the  event  of  its
assignment, as such term is defined in the 1940 Act.

Custodian.  State  Street  Bank and Trust  Company  serves as  custodian  of the
Corporation's  portfolio  securities and is located at 801 Pennsylvania  Avenue,
Kansas City, Missouri 64105.

Stockholder Service Agent. Seligman Data Corp. serves as the stockholder service
agent to the Corporation  and is located at 100 Park Avenue,  New York, New York
10017.

Administrator.  Ameriprise  Financial,  Inc.  serves  as  administrator  to  the
Corporation  and  is  located  at  Ameriprise  Financial  Center,   Minneapolis,
Minnesota 55474.