000-50646
|
|
61-1430858
|
(Commission
File Number)
|
|
(IRS
Employer Identification No.)
|
|
|
|
150
INDEPENDENCE DRIVE,
|
|
|
MENLO
PARK, CA
|
|
94025
|
(Address
of Principal Executive Offices)
|
|
(Zip
Code)
|
o
|
Written
communications pursuant to Rule 425 under the Securities Act (17
CFR
230.425)
|
|
|
o
|
Soliciting
material pursuant to Rule 14a-12(b) under the Exchange Act (17 CFR
240.14a-12(b))
|
|
|
o
|
Pre-commencement
communications pursuant to Rule 14d-2(b) under the Exchange Act (17
CFR
240.14d-2(b))
|
|
|
o
|
Pre-commencement
communications pursuant to Rule 13e-4(c) under the Exchange Act (17
CFR
240.13e-4(c))
|
(d) Exhibits
|
|
||
|
|
||
Exhibit
Number
|
|
Exhibit
Description
|
|
|
|||
23.1
|
|
Consent
of Independent Registered
Public Accounting Firm,
with respect to the
financial statements of Sieger Engineering, Inc.
|
|
|
|
|
|
99.1
|
|
Audited
financial statements of
Sieger Engineering, Inc. as of and
for the years ended December
31, 2005, 2004 and 2003. Unaudited financial statements of
Sieger Engineering, Inc. as of and
for the three months ended
March 31, 2006 and 2005.
|
|
|
|
ULTRA
CLEAN HOLDINGS, INC.
|
||
|
|
|
|
|
Date:
|
May 30,
2007
|
By:
|
/s/ Jack Sexton | |
|
|
|||
|
|
|
Name:
|
Jack
Sexton
|
|
|
|
Title:
|
Vice
President and Chief Financial
Officer
|