SCHEDULE 13G/A

-----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, VYb1eOdGcdeJozNBlu9QQEQm22zPIuRWPDp5OcKprOA6M7Zpbq2vOB5qR3bvPWah oS0lGJmXri+R1GiaV9oXng== 0001193125-04-031231.txt : 20040227 0001193125-04-031231.hdr.sgml : 20040227 20040227153505 ACCESSION NUMBER: 0001193125-04-031231 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20040227 GROUP MEMBERS: COLUMBIA ACORN TRUST GROUP MEMBERS: WAM ACQUISITION GP, INC. SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: SPARTECH CORP CENTRAL INDEX KEY: 0000077597 STANDARD INDUSTRIAL CLASSIFICATION: MISCELLANEOUS PLASTIC PRODUCTS [3080] IRS NUMBER: 430761773 STATE OF INCORPORATION: DE FISCAL YEAR END: 1031 FILING VALUES: FORM TYPE: SC 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-33091 FILM NUMBER: 04635001 BUSINESS ADDRESS: STREET 1: 120 S CENTRAL AVE STREET 2: STE 1700 CITY: CLAYTON STATE: MO ZIP: 63105 BUSINESS PHONE: 3147214242 MAIL ADDRESS: STREET 1: 120 S CENTRAL AVE STREET 2: STE 1700 CITY: CLAYTON STATE: MO ZIP: 63105 FORMER COMPANY: FORMER CONFORMED NAME: SPARTAN MANUFACTURING CORP DATE OF NAME CHANGE: 19830621 FORMER COMPANY: FORMER CONFORMED NAME: PERMANEER CORP DATE OF NAME CHANGE: 19781019 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: LIBERTY 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/A BUSINESS ADDRESS: STREET 1: 227 W MONROE STREET STREET 2: SUITE 3000 CITY: CHICAGO STATE: IL ZIP: 60606 BUSINESS PHONE: 3126349230 MAIL ADDRESS: STREET 1: 227 W MONROE ST STREET 2: STE 3000 CITY: CHICAGO STATE: IL ZIP: 60606 FORMER COMPANY: FORMER CONFORMED NAME: WANGER ASSET MANAGEMENT LP DATE OF NAME CHANGE: 19990108 SC 13G/A 1 dsc13ga.htm SCHEDULE 13G/A SCHEDULE 13G/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No. 3)*

Spartech Corporation

(Name of Issuer)

Common Stock

(Title of Class of Securities)

847220209

(CUSIP Number)

January 31, 2004

(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 the disclosures provided in a prior cover page.

The information required in the remainder of this cover 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).

Page 1 of 10 pages


CUSIP No. 847220209		13G		Page 2 of 11 Pages



1.	Name of Reporting Person S.S. of I.R.S. Identification No. of above person Columbia Wanger Asset Management, L.P. 36-3820584

2.	Check the Appropriate Box if a Member of a Group* Not Applicable	(a) ¨ (b) ¨

3.	SEC Use Only

4.	Citizenship or Place of Organization Delaware

NUMBER OF

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH

5. Sole Voting Power

None

6. Shared Voting Power

3,108,000

7. Sole Dispositive Power

None

8. Shared Dispositive Power

3,108,000


9.	Aggregate Amount Beneficially Owned by Each Reporting Person 3,108,000

10.	Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares* Not Applicable	¨

11.	Percent of Class Represented by Amount in Row 9 10.6%

12.	Type of Reporting Person* IA


CUSIP No. 847220209		13G		Page 3 of 11 Pages



1.	Name of Reporting Person S.S. of I.R.S. Identification No. of above person WAM Acquisition GP, Inc.

2.	Check the Appropriate Box if a Member of a Group* Not Applicable	(a) ¨ (b) ¨

3.	SEC Use Only

4.	Citizenship or Place of Organization Delaware

NUMBER OF

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH

5. Sole Voting Power

None

6. Shared Voting Power

3,108,000

7. Sole Dispositive Power

None

8. Shared Dispositive Power

3,108,000


9.	Aggregate Amount Beneficially Owned by Each Reporting Person 3,108,000

10.	Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares* Not Applicable	¨

11.	Percent of Class Represented by Amount in Row 9 10.6%

12.	Type of Reporting Person* CO


CUSIP No. 847220209		13G		Page 4 of 11 Pages



1.	Name of Reporting Person S.S. of I.R.S. Identification No. of above person Columbia Acorn Trust

2.	Check the Appropriate Box if a Member of a Group* Not Applicable	(a) ¨ (b) ¨

3.	SEC Use Only

4.	Citizenship or Place of Organization Massachusetts

NUMBER OF

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH

5. Sole Voting Power

None

6. Shared Voting Power

2,645,000

7. Sole Dispositive Power

None

8. Shared Dispositive Power

2,645,000


9.	Aggregate Amount Beneficially Owned by Each Reporting Person 2,645,000

10.	Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares* Not Applicable	¨

11.	Percent of Class Represented by Amount in Row 9 9.0%

12.	Type of Reporting Person* IV

Item 1.

(a)

Name of Issuer:

Spartech Corporation

Item 1.

(b)

Address of Issuer’s Principal Executive Offices:

120 S. Central Avenue

Suite 1700

Clayton, MO 63105-1705

Item 2.

(a)

Name of Person Filing:

Columbia Wanger Asset Management, L.P. (“WAM”)

WAM Acquisition GP, Inc., the general partner of WAM (“WAM GP”)

Columbia Acorn Trust (“Acorn”)

Item 2.

(b)

Address of Principal Business Office:

WAM, WAM GP, and Acorn are located at:

227 West Monroe Street, Suite 3000

Chicago, Illinois 60606

Item 2.

(c)

Citizenship:

WAM is a Delaware limited partnership; WAM GP is a Delaware corporation; Acorn is a Massachusetts business trust.

Item 2.

(d)

Title of Class of Securities:

Common Stock

Item 2.

(e)

CUSIP Number: 847220209

Item 3.

Type of Person:

(d)

Acorn is an Investment Company under section 8 of the Investment Company Act.

(e)

WAM is an Investment Adviser registered under section 203 of the Investment Advisers Act of 1940; WAM GP is the General Partner of the Investment Adviser.

Page 5 of 10 Pages



Item 4.	Ownership (at January 31, 2004):

	(a)	Amount owned “beneficially” within the meaning of rule 13d-3: 3,108,000

	(b)	Percent of class: 10.6% (based on 29,351,907 shares outstanding as of December 31, 2003)

	(c)	Number of shares as to which such person has:

		(i)	sole power to vote or to direct the vote: none

		(ii)	shared power to vote or to direct the vote: 3,108,000

		(iii)	sole power to dispose or to direct the disposition of: none

		(iv)	shared power to dispose or to direct disposition of: 3,108,000

Item 5.	Ownership of Five Percent or Less of a Class: Not Applicable

Item 6.	Ownership of More than Five Percent on Behalf of Another Person: The shares reported herein have been acquired on behalf of discretionary clients of WAM, including Acorn. Persons other than WAM and WAM GP are entitled to receive all dividends from, and proceeds from the sale of, those shares. Acorn is the only such person known to be entitled to all dividends from, and all proceeds from the sale of, shares reported herein to the extent of more than 5% of the class.

Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company: Not Applicable

Item 8.	Identification and Classification of Members of the Group: Not Applicable

Item 9.	Notice of Dissolution of Group: Not Applicable

Page 6 of 10 Pages

Item 10.

Certification:

By signing below I certify that, to the best of my 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 held 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.

Page 7 of 10 Pages

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.

Date: February 27, 2004

The undersigned corporation, on the date above written, agrees and consents to the joint filing on its behalf of this Schedule 13G in connection with its beneficial ownership of the security reported herein.


WAM Acquisition GP, Inc. for itself and as general partner of COLUMBIA WANGER ASSET MANAGEMENT, L.P.

By:		/s/ Bruce H. Lauer

		Bruce H. Lauer Senior Vice President and Secretary

The undersigned trust, on the date above written, agrees and consents to the joint filing on its behalf of this Schedule 13G in connection with its beneficial ownership of the security reported herein.


COLUMBIA ACORN TRUST

By:		/s/ Bruce H. Lauer

		Bruce H. Lauer Vice President, Treasurer and Secretary

Page 8 of 10 Pages

Exhibit Index


Exhibit 1		Joint Filing Agreement dated as of February 27, 2004 by and among Columbia Wanger Asset Management, L.P., WAM Acquisition GP, Inc. and Columbia Acorn Trust.

Page 9 of 10 Pages

EXHIBIT 1

JOINT FILING AGREEMENT

The undersigned hereby agree to the joint filing of the Schedule 13G to which this Agreement is attached.

Dated: February 27, 2004


WAM Acquisition GP, Inc. for itself and as general partner of COLUMBIA WANGER ASSET MANAGEMENT, L.P.

By:		/s/ Bruce H. Lauer

		Bruce H. Lauer Senior Vice President and Secretary


COLUMBIA ACORN TRUST

By:		/s/ Bruce H. Lauer

		Bruce H. Lauer Vice President, Treasurer and Secretary

Page 10 of 10 pages

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