-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, MRS3SdRM2pYiSfKtH3HsrnqGITzxUzGo0NxH5FzhJXu8y/327ahc6RcyIdRercfb Ttwg7EcdiJ7b7IgdndgSpA== 0000908733-09-000305.txt : 20090507 0000908733-09-000305.hdr.sgml : 20090507 20090507163356 ACCESSION NUMBER: 0000908733-09-000305 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20090507 DATE AS OF CHANGE: 20090507 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: PERICOM SEMICONDUCTOR CORP CENTRAL INDEX KEY: 0001001426 STANDARD INDUSTRIAL CLASSIFICATION: SEMICONDUCTORS & RELATED DEVICES [3674] IRS NUMBER: 770254621 STATE OF INCORPORATION: CA FISCAL YEAR END: 0630 FILING VALUES: FORM TYPE: SC 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-52695 FILM NUMBER: 09805999 BUSINESS ADDRESS: STREET 1: 3545 NORTH FIRST STREET CITY: SAN JOSE STATE: CA ZIP: 95134 BUSINESS PHONE: 4084350800 MAIL ADDRESS: STREET 1: 3545 NORTH FIRST STREET CITY: SAN JOSE STATE: CA ZIP: 95134 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: COLUMBIA WANGER ASSET MANAGEMENT LP CENTRAL INDEX KEY: 0000908733 STANDARD INDUSTRIAL CLASSIFICATION: UNKNOWN SIC - 0000 [0000] IRS NUMBER: 363820584 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: 227 W MONROE STREET STREET 2: SUITE 3000 CITY: CHICAGO STATE: IL ZIP: 60606 BUSINESS PHONE: 3126349231 MAIL ADDRESS: STREET 1: 227 W MONROE ST STREET 2: STE 3000 CITY: CHICAGO STATE: IL ZIP: 60606 FORMER COMPANY: FORMER CONFORMED NAME: LIBERTY WANGER ASSET MANAGEMENT LP DATE OF NAME CHANGE: 20010220 FORMER COMPANY: FORMER CONFORMED NAME: WANGER ASSET MANAGEMENT LP DATE OF NAME CHANGE: 19990108 SC 13G 1 pericomsemiconductorcorp.htm PERICOM SEMICONDUCTOR CORP 13G

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

____________________

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. )*

Pericom Semiconductor Corp
___________________________________________________________
(Name of Issuer)

COMMON STOCK
___________________________________________________________
(Title of Class of Securities)

713831105

______________________________

(CUSIP Number)

April 30, 2009

___________________________________________________________
(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the Rule pursuant to which this Schedule is filed:

[X]     Rule 13d – 1(b)
[ ]     Rule 13d – 1(c)
[ ]     Rule 13d – 1(d)

* The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes.)

CUSIP No 713831105

13G

2 of 7 Pages

1	NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY): Columbia Wanger Asset Management, L.P. 04-3519872
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a) [ ] (b) [ ]
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5 SOLE VOTING POWER	2,672,000
		6 SHARED VOTING POWER	0
		7 SOLE DISPOSITIVE POWER	2,855,200
		8 SHARED DISPOSITIVE POWER	0
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,855,200
10	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (See Instructions) [ ]
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 11.31%
12	TYPE OF REPORTING PERSON (See Instructions) IA

Item 1(a). Name of Issuer:

Pericom Semiconductor Corp

Item 1(b). Address of Issuer’s Principal Executive Offices:

3545 North First Street
San Jose, CA 95134

Item 2(a). Name of Person Filing:

Columbia Wanger Asset Management, L.P.

Item 2(b). Address of Principal Business Office or, if None, Residence:

227 West Monroe Street, Suite 3000, Chicago, IL 60606.

Item 2(c). Citizenship:

Delaware

Item 2(d). Title of Class of Securities:

Common Stock

Item 2(e). CUSIP Number:

713831105

Item 3. If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b) or (c),

Check Whether the Person Filing is a:

(a)

[ ] Broker or dealer registered under Section 15 of the Exchange Act.

(b)

[ ] Bank as defined in Section 3(a)(6) of the Exchange Act.

(c)

[ ] Insurance company as defined in Section 3(a)(19) of the Exchange Act.

(d)

[ ] Investment company registered under Section 8 of the Investment Company Act.

(e)

[ X ] An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E).

(f)

[ ] An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F).

(g)

[ ] A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G).

(h)

[ ] A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act.

(i)

[ ] A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act.

(j)

[ ] Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

If this statement is filed pursuant to Rule 13d-1(c), check this box. [ ]

Item 4. Ownership:

With respect to the beneficial ownership of the reporting person, see Items 5 through 11 of the cover pages to this Schedule 13G, which are incorporated herein by reference.

Item 5. Ownership of 5 Percent or Less of a Class:

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [ ].

Item 6. Ownership or More than Five Percent on Behalf of Another Person:

The shares reported herein include shares held by Columbia Acorn Trust (CAT), a Massachusetts business trust that is advised by the reporting person. CAT holds 8.89% of the shares of the Issuer.

Item 7. Identification and Classification of the Subsidiary Which Acquired the

Security Being Reported on by the Parent Holding Company or Control Person:

Not Applicable.

Item 8. Identification and Classification of Members of the Group:

Not Applicable.

Item 9. Notice of Dissolution of Group:

Not Applicable.

Item 10. Certification:

By signing below each of the undersigned certifies that, to the best of such undersigned’s knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Dated: May 8, 2009

Columbia Wanger Asset Management, L.P.

By: /s/ Bruce H. Lauer
_____________________

Bruce H. Lauer

Senior Vice President and Secretary,
WAM Acquisition GP, Inc., General Partner

Exhibit 99.1

EXHIBIT 99.1 - JOINT FILING AGREEMENT

The undersigned hereby agree that they are filing this statement jointly pursuant to Rule 13d-1(k)(1). Each of them is responsible for the timely filing of such Schedule 13G and any amendments thereto, and for the completeness and accuracy of the information concerning such person contained therein; but none of them is responsible for the completeness or accuracy of the information concerning the other persons making the filing, unless such person knows or has reason to believe that such information is inaccurate.

In accordance with Rule 13d-1(k)(1) promulgated under the Securities and Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing with each other on behalf of each of them of to such a statement on Schedule 13G with respect to the common stock of beneficially owned by each of them. This Joint Filing Agreement shall be included as an exhibit to such Schedule 13G.

Dated: May 8, 2009

Columbia Wanger Asset Management, L.P.

By: /s/ Bruce H. Lauer
_____________________

Bruce H. Lauer

Senior Vice President and Secretary,

WAM Acquisition GP, Inc., General Partner

Columbia Acorn Trust

By: /s/ Bruce H. Lauer
_____________________

Bruce H. Lauer

Vice President, Treasurer and Secretary

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