<PAGE> 1
AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JULY 24, 1997
REGISTRATION NO. 333-23407
================================================================================
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
------------------------
Post-Effective AMENDMENT NO. 1
TO
FORM S-1
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933
------------------------
AURORA BIOSCIENCES CORPORATION
(EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
<TABLE>
<S> <C> <C>
DELAWARE 8731 33-0669859
(STATE OR JURISDICTION (PRIMARY STANDARD INDUSTRIAL I.R.S. EMPLOYER
OF INCORPORATION OR CLASSIFICATION CODE NUMBER) IDENTIFICATION NUMBER
ORGANIZATION)
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11149 NORTH TORREY PINES ROAD
LA JOLLA, CALIFORNIA 92037
(619) 452-5000
(ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
------------------------
TIMOTHY J. RINK
CHAIRMAN OF THE BOARD, PRESIDENT AND CHIEF EXECUTIVE OFFICER
AURORA BIOSCIENCES CORPORATION
11149 NORTH TORREY PINES ROAD
LA JOLLA, CALIFORNIA 92037
(619) 452-5000
(NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
OF AGENT FOR SERVICE)
------------------------
COPIES TO:
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<S> <C>
THOMAS A. COLL, ESQ. JEFFREY S. MARCUS, ESQ.
ERIC J. LOUMEAU, ESQ. TAMARA POWELL TATE, ESQ.
COOLEY GODWARD LLP MORRISON & FOERSTER LLP
4365 EXECUTIVE DRIVE, SUITE 1100 1290 AVENUE OF THE AMERICAS
SAN DIEGO, CA 92121 NEW YORK, NY 10104
(619) 550-6000 (212) 468-8000
</TABLE>
================================================================================
<PAGE> 2
This Post-Effective Amendment No. 1 is being filed to deregister 449,816 shares
of Common Stock (the "Option Shares") of Aurora Biosciences Corporation (the
"Registrant") covered by the Form S-1 Registration Statement No. 333-23407, as
amended (the "Registration Statement"). The Option Shares, which were issuable
in connection with a firm commitment underwritten offering of Common Stock by
the Registrant (the "Offering"), have not been sold as of the date of this
Post-Effective Amendment No. 1 and are no longer being offered. The terms of
the Offering are described in the prospectus filed as part of the Registration
Statement.
<PAGE> 3
SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Post-Effective Amendment No. 1 to Registration Statement to
be signed on its behalf by the undersigned, thereunto duly authorized, in the
City of San Diego, County of San Diego, State of California, on the 24th day of
July, 1997.
By: /s/ TIMOTHY J. RINK
------------------------------------
Timothy J. Rink
President and Chief Executive
Officer
Pursuant to the requirements of the Securities Act of 1933, this
Post-Effective Amendment No. 1 to Registration Statement has been signed by the
following persons in the capacities and on the dates indicated.
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<CAPTION>
SIGNATURE TITLE DATE
- --------------------------------------------- ----------------------------- ----------------
<S> <C> <C>
/s/ TIMOTHY J. RINK Chairman of the Board, July 24, 1997
- --------------------------------------------- President and Chief Executive
Timothy J. Rink, M.A., M.D., Sc.D. Officer (Principal Executive
Officer)
* Senior Director of Finance July 24, 1997
- --------------------------------------------- and Administration
Deborah J. Tower (Principal Financial and
Accounting Officer)
* Director July 24, 1997
- ---------------------------------------------
J. Gordon Foulkes, Ph.D.
* Director July 24, 1997
- ---------------------------------------------
James C. Blair, Ph.D.
* Director July 24, 1997
- ---------------------------------------------
Kevin J. Kinsella
* Director July 24, 1997
- ---------------------------------------------
Hugh Y. Rienhoff, Jr., M.D.
* Director July 24, 1997
- ---------------------------------------------
Lubert Stryer
* Director July 24, 1997
- ---------------------------------------------
Timothy J. Wollaeger
* By: /s/ TIMOTHY J. RINK
- ---------------------------------------------
Timothy J. Rink, M.A., M.D., Sc.D.
Attorney-In-Fact
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