0001546927-13-000030.txt : 20130214 0001546927-13-000030.hdr.sgml : 20130214 20130214074747 ACCESSION NUMBER: 0001546927-13-000030 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20130214 DATE AS OF CHANGE: 20130214 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: NATUS MEDICAL INC CENTRAL INDEX KEY: 0000878526 STANDARD INDUSTRIAL CLASSIFICATION: ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS [3845] IRS NUMBER: 770154833 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-77922 FILM NUMBER: 13606265 BUSINESS ADDRESS: STREET 1: 1501 INDUSTRIAL ROAD CITY: SAN CARLOS STATE: CA ZIP: 94070 BUSINESS PHONE: 6508020400 MAIL ADDRESS: STREET 1: 1501 INDUSTRIAL ROAD CITY: SAN CARLOS STATE: CA ZIP: 94070 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: Camber Capital Management LLC CENTRAL INDEX KEY: 0001444043 IRS NUMBER: 421693587 STATE OF INCORPORATION: MA FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A BUSINESS ADDRESS: STREET 1: 101 HUNTINGTON AVENUE STREET 2: SUITE 2550 CITY: BOSTON STATE: MA ZIP: 02199 BUSINESS PHONE: 617-717-6600 MAIL ADDRESS: STREET 1: 101 HUNTINGTON AVENUE STREET 2: SUITE 2550 CITY: BOSTON STATE: MA ZIP: 02199 SC 13G/A 1 natus201213gv2.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2) Natus Medical Incorporated -------------------------------------------------------------------------------- (Name of Issuer) Common Shares, $0.001 par value -------------------------------------------------------------------------------- (Title of Class of Securities) 639050103 -------------------------------------------------------------------------------- (CUSIP Number) Camber Capital Management, 101 Huntington Ave., Boston, MA 02109, 617-717-6600 -------------------------------------------------------------------------------- (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) August 31, 2012 -------------------------------------------------------------------------------- (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: |_| Rule 13d-1(b) |X| 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 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). -------------------------------------------------------------------------------- CUSIP No. 639050103 13G Page 2 of 4 Pages -------------------------------------------------------------------------------- 1. Names of Reporting Persons. Camber Capital Management LLC I.R.S. Identification Nos. of above persons (entities only) 42-1693587 -------------------------------------------------------------------------------- 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 Camber Capital Management LLC -- Massachusetts -------------------------------------------------------------------------------- 5. SOLE VOTING POWER 0 shares ------------------------------------------------------------- 6. SHARED VOTING POWER NUMBER OF SHARES 1,666,003 shares BENEFICIALLY ------------------------------------------------------------- OWNED BY EACH 7. SOLE DISPOSITIVE POWER REPORTING PERSON WITH 0 shares ------------------------------------------------------------- 8. SHARED DISPOSITIVE POWER 1,666,003 shares -------------------------------------------------------------------------------- 9. Aggregate Amount Beneficially Owned by Each Reporting Person Camber Capital Management LLC -- 5.56% -------------------------------------------------------------------------------- 10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) |_| -------------------------------------------------------------------------------- 11. Percent of Class Represented by Amount in Row (9) Camber Capital Management LLC -- 5.56% -------------------------------------------------------------------------------- 12. Type of Reporting Person (See Instructions) Camber Capital Management LLC -- 00 (Limited Liability Company) -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- CUSIP No. 639050103 13G Page 3 of 4 Pages -------------------------------------------------------------------------------- 1. Names of Reporting Persons. Stephen DuBois I.R.S. Identification Nos. of above persons (entities only) N/A -------------------------------------------------------------------------------- 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 Stephen DuBois -- United States -------------------------------------------------------------------------------- 5. SOLE VOTING POWER 0 shares ------------------------------------------------------------- 6. SHARED VOTING POWER NUMBER OF SHARES 1,666,003 shares BENEFICIALLY ------------------------------------------------------------- OWNED BY EACH 7. SOLE DISPOSITIVE POWER REPORTING PERSON WITH 0 shares ------------------------------------------------------------- 8. SHARED DISPOSITIVE POWER 1,666,003 shares -------------------------------------------------------------------------------- 9. Aggregate Amount Beneficially Owned by Each Reporting Person Stephen DuBois -- 5.56% -------------------------------------------------------------------------------- 10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) |_| -------------------------------------------------------------------------------- 11. Percent of Class Represented by Amount in Row (9) Stephen DuBois -- 5.56% -------------------------------------------------------------------------------- 12. Type of Reporting Person (See Instructions) Stephen DuBois -- IN -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- CUSIP No. 639050103 13G Page 4 of 4 Pages Item 1. (a) Name of Issuer: Natus Medical Incorporated (b) Address of Issuer's Principal Executive Offices: 1501 Industrial Road, San Carlos, CA 94070 Item 2. (a) Name of Person Filing: Camber Capital Management LLC Stephen DuBois (b) Address of the Principal Office or, if none, residence: Camber Capital Management LLC Stephen DuBois 101 Huntington Avenue Suite 2550 Boston, MA 02199 (c) Citizenship: Camber Capital Management -- Massachusetts Stephen DuBois -- United States (d) Title of Class of Securities: Common Shares, $0.001 par value (the "Common Shares") (e) CUSIP Number: 639050103 Item 3. If this statement is filed pursuant to SS.240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a: (a) |_| Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o). (b) |_| Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c). (c) |_| Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c). (d) |_| Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C 80a-8). (e) |X| An investment adviser in accordance with S.240.13d-1(b)(1)(ii)(E); (f) |_| An employee benefit plan or endowment fund in accordance with S.240.13d-1(b)(1)(ii)(F); (g) |_| A parent holding company or control person in accordance with S. 240.13d-1(b)(1)(ii)(G); (h) |_| A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813); (i) |_| A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3); (j) |_| Group, in accordance with S.240.13d-1(b)(1)(ii)(J). Item 4. Ownership Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1. (a) Amount beneficially owned: Camber Capital Management LLC -- 1,666,003 Stephen DuBois -- 1,666,003 (b) Percent of class: Camber Capital Management LLC -- 5.56% Stephen DuBois -- 5.56% (c) Number of shares as to which the person has: 1,666,003 (i) Sole power to vote or to direct the vote Camber -- 0 DuBois -- 0 (ii) Shared power to vote or to direct the vote Camber -- 1,666,003 DuBois -- 1,666,003 (iii) Sole power to dispose or to direct the disposition of Camber -- 0, DuBois -- O. (iiii) Shared power to dispose or to direct the disposition of Camber -- 1,666,003, DuBois -- 1,666,003. Item 5. Ownership of Five 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 of More than Five Percent on Behalf of Another Person. Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person. Item 8. Identification and Classification of Members of the Group Item 9. Notice of Dissolution of Group Item 10. Certification (a) The following certification shall be included if the statement is filed pursuant to S.240.13d-1(b): 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. (b) The following certification shall be included if the statement is filed pursuant to S.240.13d-1(c): By signing below I certify that, to the best of my knowledge and belief, the securities referred to above 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. 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. CAMBER CAPITAL MANAGEMENT LLC By: /s/Sean George Sean George Chief Financial Officer STEPHEN DUBOIS By: /s/ Stephen DuBois Stephen DuBois, individually JOINT FILING AGREEMENT This Joint Filing Agreement, dated February 14, 2013, is by and between Camber Capital Management LLC, a Massachusetts limited liability company, and Stephen DuBois, an individual (the foregoing are collectively referred to herein as the "Filers").Each of the Filers may be required to file with the United States Securities and Exchange Commission a statement on Schedule 13G with respect to common shares, $0.001 par value of Natus Medical Incorporated beneficially owned by them from time to time. Pursuant to and in accordance with Rule 13(d)(1)(k) promulgated under the Securities Exchange Act of 1934, as amended, the Filers hereby agree to file a single statement on Schedule 13G and/or 13D (and any amendments thereto) on behalf of each of such parties, and hereby further agree to file this Joint Filing Agreement as an exhibit to such statement, as required by such rule. This Joint Filing Agreement may be terminated by any of the Filers upon one week's prior written notice or such lesser period of notice as the Filers may mutually agree. Executed and delivered as of the date first above written. CAMBER CAPITAL MANAGEMENT LLC By: /s/ Sean George Sean George Chief Financial Officer STEPHEN DUBOIS By: /s/ Stephen DuBois Stephen DuBois, individually