<PAGE>
AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON MAY 21, 1997
REGISTRATION NO. 333-2766
================================================================================
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
_______________
AMENDMENT NO. 1
TO
FORM S-3
REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
_______________
TETRA TECH, INC.
(Exact name of registrant as specified in charter)
_______________
Delaware 95-4148514
(State or other jurisdiction of (I.R.S. Employer
incorporation or organization) Identification No.)
630 N. ROSEMEAD BOULEVARD
PASADENA, CALIFORNIA 91107
(818) 351-4664
(Address, including zip code, and telephone number,
including area code, of registrant's principal executive offices)
LI-SAN HWANG
TETRA TECH, INC.
630 N. ROSEMEAD BOULEVARD
PASADENA, CALIFORNIA 91107
(818) 351-4664
(Name, address, including zip code, and telephone number,
including area code, of agent for service)
_______________
Copy to:
Janis B. Salin, Esq.
Riordan & McKinzie
300 S. Grand Avenue, 29th Floor
Los Angeles, California 90071-3155
(213) 629-4824
_______________
CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
================================================================================================================================
AMOUNT PROPOSED MAXIMUM PROPOSED MAXIMUM AMOUNT
TITLE OF EACH CLASS OF TO BE OFFERING AGGREGATE OF
SECURITIES TO BE REGISTERED REGISTERED(1) PRICE PER SHARE(2) OFFERING PRICE(2) REGISTRATION FEE (2)
<S> <C> <C> <C> <C>
Common Stock, par value $.01 per share 632,189 shares $22.25 $14,066,205 $4,851
================================================================================================================================
</TABLE>
(1) Removes from registration all shares not previously sold pursuant to this
Registration Statement.
(2) Previously paid by the Registrant.
<PAGE>
The Registrant hereby removes from registration all shares of its Common
Stock, $.01 par value per share not sold prior to the date hereof pursuant to
the Registrant's Registration Statement on Form S-3 filed on March 26, 1996
(File No. 333-2766).
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<PAGE>
SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, the registrant has
duly caused this Amendment to the Registration Statement to be signed on its
behalf by the undersigned, thereunto duly authorized, in the City of Pasadena,
State of California, on May 20, 1997.
Tetra Tech, Inc.
By: /s/ Li-San Hwang
------------------------------------
Li-San Hwang
Chairman of the Board, Chief Executive
Officer and President
Pursuant to the requirements of the Securities Act of 1933, this Amendment to
the Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.
SIGNATURE TITLE DATE
--------- ----- ----
/s/ Li-San Hwang Chairman of the Board, Chief May 20, 1997
- ----------------------- Executive Officer and President
Li-San Hwang (Principal Executive Officer)
* Vice President, Chief Financial May 20, 1997
- ----------------------- Officer and Treasurer
James M. Jaska (Principal Financial
and Accounting Officer)
* Director May 20, 1997
- -----------------------
J. Christopher Lewis
* Director May 20, 1997
- -----------------------
Patrick C. Haden
* Director May 20, 1997
- -----------------------
Joseph J. Shelton
*By: /s/ Li-San Hwang
- -----------------------
Li-San Hwang
Attorney-in-Fact
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