<PAGE>
Prospectus Supplement No. 3 Filed pursuant to Rule 424(b)(3)
(to the prospectus dated May 1, 2000) Registration No. 333-31530
AT HOME CORPORATION
6,322,003 Shares of Series A Common Stock
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This prospectus supplement relates to the resale by selling stockholders
named on pages 22 to 25 of the prospectus dated May 1, 2000, as supplemented by
the prospectus supplement No. 1 dated June 1, 2000 and the prospectus
supplement No. 2 dated June 27, 2000 to which this prospectus supplement is
attached.
This prospectus supplement should be read in conjunction with the prospectus
dated May 1, 2000, the prospectus supplement No.1 dated June 1, 2000 and the
prospectus supplement No. 2 dated June 27, 2000 which is to be delivered with
this prospectus supplement. All capitalized terms used but not defined in this
prospectus supplement shall have the meanings given to them in the prospectus.
The information in the table appearing under the heading "Selling
Stockholders--Former Stockholders of Hartford House, Ltd. and Kendara, Inc."
and the related footnotes in the prospectus are superseded in full by the
information appearing in the table below:
<TABLE>
<CAPTION>
Shares
Owned
Before Total Shares
the that May be
Name Offering Offered
---- --------- ------------
<S> <C> <C>
Fortuna Ventures, L.P(1).......................... 1,553,240 1,553,240
Stephen Schutz and Susan Schutz, Trustees under
Trust dated December 19, 1985(1)................. 1,062,665 1,062,665
Jared Schutz(1)................................... 823,093 823,093
Mohr, Davidow Ventures V, L.P.(2)................. 475,446 475,446
Pavani Diwanji(3)................................. 286,580 286,580
Freeman Murray(4)................................. 208,996 208,996
Bret Comolli(5)................................... 80,791 80,791
IVP Broadband Fund L.P.(6)........................ 51,123 51,123
Robert Polis, as Trustee of the Robert Nathan
Polis Revocable Trust dated August 25, 1993(1)... 46,472 46,472
Regents of the University of California........... 38,321 38,321
Mohr, Davidow Ventures V, L.P. as nominee for MDV
Entrepreneurs' Network Fund II(A), L.P. and MDV
Entrepreneurs' Network Fund II(B), L.P.(2)....... 35,786 35,786
Yale University................................... 34,489 34,489
Horsley Bridge Fund V, L.P........................ 31,934 31,934
Brian Wilson...................................... 29,578 29,578
Carnegie Corporation of New York.................. 25,548 25,548
Endowment Venture Partners III, L.P. ............. 25,548 25,548
Community Foundation Silicon Valley............... 25,000 25,000
Ford Foundation................................... 22,993 22,993
Jean Michel Leon and Christilla Leon.............. 19,719 19,719
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
Shares
Owned Total Shares
Before the that May be
Name Offering Offered
---- ---------- ------------
<S> <C> <C>
Andrew W. Mellon Foundation...................... 19,161 19,161
Leland Stanford Junior University................ 19,161 19,161
Nassau Capital (Princeton)....................... 19,161 19,161
St. Paul Venture Capital......................... 19,161 19,161
Gleb Budman...................................... 14,000 14,000
Howard Hughes Medical Institute.................. 12,774 12,774
Harvard Private Capital Holdings, Inc. .......... 12,773 12,773
Mutual Life Insurance Company of New York........ 12,773 12,773
Northwestern University.......................... 12,773 12,773
Stuart Cheshire.................................. 11,831 11,831
The Duke Endowment............................... 10,219 10,219
Ewing Marion Kauffman Foundation................. 10,219 10,219
Rockefeller Foundation........................... 10,219 10,219
Gothic Corporation (Duke University)............. 10,219 10, 219
Williams College................................. 10,219 10,219
Jason Knight..................................... 9,859 9,859
Heinrich Gantenbein.............................. 9,859 9,859
Brinson Partnership Fund Trust--1998 Primary
Fund............................................ 9,529 9,529
Paul B. Callahan................................. 7,887 7,887
Vlad Bolshakov................................... 7,887 7,887
Arthur Van Hoff.................................. 7,697 7,697
David Cheriton................................... 7,697 7,697
EDS Retirement Plan Trust........................ 7,345 7,345
HB-PGGM Fund II, L.P. ........................... 6,387 6,387
Knightsbridge Venture Capital IV, L.P. .......... 6,387 6,387
Santa Clara University........................... 6,387 6,387
Vulcan Ventures Inc. ............................ 6,387 6,387
State Universities Retirement System............. 6,068 6,068
SBC Master Pension Trust......................... 6,068 6,068
Christopher Kelly................................ 5,915 5,915
G & H Partners................................... 5,842 5,842
Scott Eikenberry and Ashley Eikenberry........... 4,929 4,929
Cory Cooke and Janelle Hargrove.................. 4,929 4,929
Noel Wilson...................................... 4,929 4,929
Michael Sheridan................................. 4,046 4,046
Donna Novitsky................................... 3,943 3,943
Knightsbridge Associate Investors IX, L.P. ...... 3,832 3,832
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
Shares
Owned Total Shares
Before the that May be
Name Offering Offered
---- ---------- ------------
<S> <C> <C>
Orange County Employees Retirement System........ 3,832 3,832
Yale University Staff Retirement Plan............ 3,832 3,832
Brinson Partnership Fund--1998 Primary Fund,
L.P............................................. 3,181 3,181
Duke University Employee Retirement Plan......... 2,555 2,555
Knightsbridge Netherlands I, L.P................. 2,555 2,555
1998 Primary Brinson Partnership Fund Offshore
Series Company Ltd.............................. 2,299 2,299
Wendy Riggs...................................... 1,971 1,971
Steve Jessey..................................... 1,854 1,854
Martin Foster.................................... 1,676 1,676
Carol Dressler................................... 1,603 1,603
Richard P. Yoon.................................. 1,577 1,577
Laura Bidinger and Joseph Bidinger............... 1,577 1,577
Miko Matsumora................................... 1,577 1,577
Geoffrey Y. Yang or Amy S. Yang, Trustees for the
Yang Family Trust U/D/T dated 4/11/94........... 1,354 1,354
Mary Jane Elmore or William B. Elmore, General
Partners for Elmore Family Investments, L.P..... 1,319 1,319
T. Peter Thomas & Jacqueline Sue Stewart,
trustees of the Thomas-Stewart Family Trust
U/D/T dated 10/16/96............................ 1,255 1,255
Munex Stock Holding Company, LLC. ............... 1,161 1,161
John M. McQuillan................................ 1,141 1,141
Bob Adler........................................ 1,090 1,090
L. James Strand & Laura Strand, Trustees for the
L. James & Laura Strand Trust U/A/D 5/30/91..... 1,074 1,074
Ruthann Quindlen or David E. Liddle, Trustees for
the David E. Liddle and Ruthann Quindlen Trust
U/D/T dated 7/5/84 as amended 3/16/94........... 954 954
Drakes Landing Associates, L.P................... 929 929
Samuel D. Colella or Nancy R. Colella, Trustees
for the Colella Family Trust U/A/D 9/21/92...... 906 906
Sigma Ventures................................... 883 883
Melissa Criqui................................... 788 788
Aulis & Co. ..................................... 697 697
Foster & Foster.................................. 697 697
Samuel D. Colella or Nancy R. Colella, General
Partner for the Colella Family Partners......... 672 672
Peter C. Gotcher................................. 592 592
Antaeus Enterprises, Inc. ....................... 581 581
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
Shares
Owned Total Shares
Before the that May be
Name Offering Offered
---- ---------- ------------
<S> <C> <C>
BancBoston Investments, Inc...................... 581 581
St. Paul's School................................ 581 581
Stathis Andris................................... 581 581
Trustees of Phillips Academy..................... 581 581
Reid W. Dennis and Margaret E. Dennis, Trustees,
Under the Reid and Margaret Dennis Living Trust
U/A/D July 7, 1989.............................. 544 544
Norman A. Fogelsong or Jill M. Fogelsong,
Trustees for the Norman A. and Jill M. Fogelsong
Trust U/T/A dated 3/22/84....................... 536 536
The Prospect Hill Foundation..................... 523 523
William P. Tai................................... 501 501
Hardscrabble Associates Partnership.............. 395 395
James Gosling.................................... 394 394
Geoff Baehr...................................... 394 394
Steve Arnold..................................... 394 394
Ashmeet Sidana................................... 394 394
Jeff Whipps...................................... 394 394
Neil Leslie Robertson and Rebecca B. Robertson,
trustees of the Robertson Family Trust U/D/T
dated 5/7/98.................................... 393 393
The American School of Classical Studies at
Athens.......................................... 348 348
The Fullerton Trust.............................. 348 348
C. Bradford Jeffries............................. 290 290
HKL I L.L.C. .................................... 279 279
John K. Tillotson................................ 272 272
Mary Jane Elmore, Trustee for the Fogelsong
Childrens Trust U/T/A dated 8/1/85.............. 268 268
Timothy M. Haley and Ethna C. McGourty, Trustees
of the Haley-McGourty Family Trust U/D/T
9/27/96......................................... 262 262
R. Thomas Dyal................................... 236 236
Foster Family Limited Partnership................ 232 232
Donald E. Sveen.................................. 232 232
Louisville Presbyterian Theological Seminary..... 232 232
Patricia A. Zuch................................. 232 232
Richard J. Franke................................ 232 232
Stanford Retirement Annuity Plan................. 232 232
J. James Strand or Laura Strand, General Partner
for JLS Partners................................ 181 181
Jeffries Investment Group........................ 174 174
Robert W. Maier.................................. 174 174
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
Shares
Owned Total Shares
Before the that May be
Name Offering Offered
---- ---------- ------------
<S> <C> <C>
The Sperry Fund.................................. 174 174
Nancy E. McCroskey, Trustee under the McCroskey
Trust Agreement dated 3/15/84................... 162 162
Allen Beasley.................................... 149 149
Venture Investment Management Company III, L.P... 128 128
Alfred L. McDougal Trust......................... 116 116
Domanada Foundation.............................. 116 116
Franke Family Charitable Foundation.............. 116 116
GC & H Investments............................... 116 116
McDougal Family Foundation....................... 116 116
Pilot Trading Trust.............................. 116 116
Stephen P. Norman................................ 116 116
Syndics Investment Corporation, Ltd. ............ 116 116
The R.E.K. Profit Sharing Plan................... 116 116
William M. Kearns, Jr............................ 116 116
William S. Beinecke.............................. 116 116
Marko Balabanovic................................ 49 49
Louise Pegher, Trustee for the Julia Carver 1991
Trust U/T/A dated 6/18/91....................... 44 44
Louise Pegher, Trustee for the Dana Clevenger
1991 Trust U/T/A dated 6/18/91.................. 44 44
Louise Pegher, Trustee for the Michelle Colella
1991 Trust U/T/A dated 6/18/91.................. 44 44
Louise Pegher, Trustee for the Mark Colella 1991
Trust U/T/A dated 6/18/91....................... 44 44
Geoffrey Y. Yang, Trustee for the Haley-McGourty
Children's Trust U/T/A dated April 10, 1998..... 29 29
Mary Jane Elmore, Trustee for the Megan C. Yang
Trust U/T/A dated 5/13/96....................... 23 23
Timothy M. Haley, Trustee of Peter Wu-Sung Yang
1998 Trust U/T/A dated 3/19/98.................. 23 23
Jane Prusakova................................... 19 19
Michele Colella Sloat and Mark Samuel Colella,
Trustees for the CGK Trust, U/T/A dated
4/13/98......................................... 6 6
Total.......................................... 5,285,600 5,285,600
</TABLE>
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(1) Based on information provided to us as of February 25, 2000.
(2) Prior to our acquisition of Kendara, Mohr, Davidow Ventures V, L.P. and
Mohr, Davidow Ventures V, L.P. as nominee for MDV Entrepreneurs' Network
Fund II(A), L.P. and MDV Entrepreneurs' Network Fund II(B), L.P. together
held approximately 18.4% of the fully-diluted common shares of Kendara, and
Jonathan Feiber, a representative of these partnerships, served as a
director of Kendara.
<PAGE>
(3) Pavani Diwanji was Chief Technical Officer and a director of Kendara. Prior
to our acquisition of Kendara, Ms. Diwanji held approximately 23.2% of the
fully-diluted common shares of Kendara.
(4) Freeman Murray was Secretary of Kendara. Prior to our acquisition of
Kendara, Mr. Murray held approximately 19.0% of the fully-diluted common
shares of Kendara.
(5) Bret Comolli was Chief Executive Officer and a director of Kendara. Prior
to our acquisition of Kendara, Mr. Comolli held approximately 10.5% of the
fully-diluted common shares of Kendara.
(6) Prior to our acquisition of Kendara, Institutional Venture Partners VIII,
L.P., IVP Broadband Fund L.P. and IVM Investment Fund VIII, LLC together
held approximately 18.4% of the fully-diluted common shares of Kendara, and
Timothy M. Haley, a representative of these partnerships, served as a
director of Kendara.
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Investing in our Series A common stock involves a high degree of risk.
Please carefully consider the "Risk Factors" beginning on page 4 of the
prospectus.
NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
REGULATORS HAVE APPROVED OR DISAPPROVED OF THESE SECURITIES OR PASSED UPON THE
ADEQUACY OR ACCURACY OF THIS PROSPECTUS OR THIS PROSPECTUS SUPPLEMENT. ANY
REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
The date of this prospectus supplement is November 13, 2000.
