-----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, DsU6Pht7SFvNTwxIGm847LPhF9M4wgPiKUuO7H0BTdAeP/lGaX2hSVI93Fpbfjl5 xUj/z+d+3ebvv/hFmqBdYA== 0000932471-05-000392.txt : 20050214 0000932471-05-000392.hdr.sgml : 20050214 20050214122447 ACCESSION NUMBER: 0000932471-05-000392 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 2 FILED AS OF DATE: 20050214 DATE AS OF CHANGE: 20050214 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: COHERENT INC CENTRAL INDEX KEY: 0000021510 STANDARD INDUSTRIAL CLASSIFICATION: LABORATORY ANALYTICAL INSTRUMENTS [3826] IRS NUMBER: 941622541 STATE OF INCORPORATION: DE FISCAL YEAR END: 0930 FILING VALUES: FORM TYPE: SC 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-15939 FILM NUMBER: 05605750 BUSINESS ADDRESS: STREET 1: 5100 PATRICK HENRY DR CITY: SANTA CLARA STATE: CA ZIP: 95054 BUSINESS PHONE: 4087644000 MAIL ADDRESS: STREET 1: 5100 PATRICK HENRY DRIVE STREET 2: MAIL STOP P38 CITY: SANTA CLARA STATE: CA ZIP: 95054 FORMER COMPANY: FORMER CONFORMED NAME: COHERENT RADIATION DATE OF NAME CHANGE: 19770604 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: VANGUARD CHESTER FUNDS CENTRAL INDEX KEY: 0000752177 IRS NUMBER: 232311358 FISCAL YEAR END: 0831 FILING VALUES: FORM TYPE: SC 13G/A BUSINESS ADDRESS: STREET 1: PO BOX 2600 VM #V34 CITY: VALLEY FORGE STATE: PA ZIP: 19482 BUSINESS PHONE: 6106696289 MAIL ADDRESS: STREET 1: P.O. BOX 2600 CITY: VALLEY FORGE STATE: PA ZIP: 19482 FORMER COMPANY: FORMER CONFORMED NAME: VANGUARD PRIMECAP FUND/ DATE OF NAME CHANGE: 20011121 FORMER COMPANY: FORMER CONFORMED NAME: VANGUARD/PRIMECAP FUND INC DATE OF NAME CHANGE: 19940608 FORMER COMPANY: FORMER CONFORMED NAME: PRIMECAP FUND INC DATE OF NAME CHANGE: 19920703 SC 13G/A 1 coherent.htm

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Schedule 13G

Under the Securities Exchange Act of 1934

(Amendment No.: 6 )*

Name of issuer: Coherent, Inc.

Title of Class of Securities: Common Stock

CUSIP Number: 192479103

Date of Event Which Requires Filing of this Statement: December 31, 2004

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).

(Continued on the following page(s))

13G

CUSIP No.: 192479103

1. NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

Vanguard Chester Funds - Vanguard PRIMECAP Fund

2. CHECK THE APPROPRIATE [LINE] IF A MEMBER OF A GROUP

A. B. X

3. SEC USE ONLY

4. CITIZENSHIP OF PLACE OF ORGANIZATION

Delaware

(For questions 5-8, report the number of shares beneficially owned by each reporting person with:)

5. SOLE VOTING POWER

1,700,000

6. SHARED VOTING POWER

-0-

7. SOLE DISPOSITIVE POWER

-0-

8. SHARED DISPOSITIVE POWER

-0-

9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,700,000

10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

N/A

11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

5.56

12. TYPE OF REPORTING PERSON

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Act of 1934

Check the following [line] if a fee is being paid with this statement n/a

Item 1(a) — Name of Issuer:

Coherent, Inc.

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

5100 Patrick Henry Drive, Mail Stop P38, Santa Clara, CA 95054

Item 2(a) — Name of Person Filing:

Vanguard Chester Funds - Vanguard PRIMECAP Fund

Item 2(b) – Address of Principal Business Office or, if none, residence:

100 Vanguard Blvd., Malvern, PA 19355

Item 2(c) –Citizenship:

The fund is a business trust organized under the laws of the Commonwealth of Delaware.

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

Common Stock

Item 2(e) — CUSIP Number

192479103

Item 3 — Type of Filing:

This statement is being filed pursuant to Rule 13d-1. The person filing is an investment company registered under Section 8 of the Investment Company Act.

Item 4 — Ownership:

(a) Amount Beneficially Owned:

1,700,000

(b) Percent of Class:

5.56

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

(i) sole power to vote or direct to vote: 1,700,000

(ii) shared power to vote or direct to vote: -0-

(iii) sole power to dispose of or to direct the disposition of: -0-

(iv) shared power to dispose or to direct the disposition of: -0-

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:

Not applicable

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 Group:

Not applicable

Item 9 — Notice of Dissolution of Group:

Not applicable

Item 10 — Certification:

By signing below I certify than, to the best of my knowledge and belief, the securities referred to above were acquired in the ordinary course of business and were not acquired for the purpose of and do not have the effect of changing or influencing the control of the issuer of such securities and were not acquired in connection with or as a participant in any transaction having such 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.

Date: February 14, 2005

Name: Christopher Wightman
Title: Assistant Secretary

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