<PAGE>
Filed Pursuant to
Rule 424(b)(3) and (c)
Commission File No. 333-33916
PROSPECTUS SUPPLEMENT DATED DECEMBER 27, 2000
TO
PROSPECTUS DATED APRIL 13, 2000
501,585 SHARES
ABOUT.COM, INC.
COMMON STOCK
This Prospectus Supplement supplements our Prospectus dated April 13, 2000
relating to the public offering, which is not being underwritten, and sale by
certain of our stockholders or by pledgees, donees, transferees or other
successors in interest that receive such shares as a gift, partnership
distribution or other non-sale related transfer (the "Selling Stockholders") of
up to 501,585 shares of our Common Stock, who received such shares in connection
with our acquisition of North Sky, Inc. This Prospectus Supplement should be
read in conjunction with the Prospectus, and this Prospectus Supplement is
qualified by reference to the Prospectus except to the extent that information
herein contained supersedes the information contained in the Prospectus.
Capitalized terms used in this Prospectus Supplement and not otherwise defined
herein have the meanings specified in the Prospectus.
SELLING STOCKHOLDERS
The information contained in the table appearing on page 12 of the
Prospectus under the heading "Selling Stockholders" is hereby amended to add the
following information:
<TABLE>
<CAPTION>
Beneficial-Ownership
After Offering
----------------------
Number of Number of
Shares Shares
Name of Selling Beneficially Registered for Number of
Stockholder Owned Sale Hereby Shares Percent
--------------------------------------------------------------------------------
<S> <C> <C> <C> <C>
Dalita Stay 0 0 0 *
Dalita Stay Revocable
Trust Dated April 8,
1996(1) 82,312 82,312 0 *
Timothy V. Stay
Revocable Trust Dated
April 8, 1996(1) 69,571 69,571 0 *
<PAGE>
Bear Stearns Bank plc,
as pledgee/selling
stockholder, selling
through Bear, Stearns
& Co. Inc.(2) 200,000 200,000 0 *
</TABLE>
--------------------------
(1) The shares beneficially owned by the selling stockholder were gifted by
Dalita Stay. The selling stockholder may also be deemed to be the
beneficial owner of 100,000 shares of About common stock pledged to Bear
Stearns Bank plc.
(2) The shares beneficially owned were pledged by the Dalita Stay Revocable
Trust Dated April 8, 1996 and the Timothy V. Stay Revocable Trust Dated
April 8, 1996 to Bear Stearns Bank plc, as pledgee/selling stockholder,
and will be sold by the selling stockholder through Bear, Stearns & Co.
Inc. An affiliate of the selling stockholder was an underwriter of About's
initial public offering in April 1999 and has also provided certain
investment banking services to About from time to time.
