UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13D
Under the Securities Exchange Act of 1934
(Amendment No. 12)
NATUS MEDICAL INCORPORATED (BABY)
--------------------------------------------------------------------------------
(Name of Issuer)
Common Stock
--------------------------------------------------------------------------------
(Title of Class of Securities)
639050103
--------------------------------------------------------------------------------
(CUSIP Number)
David Nierenberg
The D3 Family Funds
19605 NE 8th Street
Camas, WA 98607
(360) 604-8600
With a copy to:
Henry Lesser, Esq.
DLA Piper US LLP
2000 University Avenue
East Palo Alto, CA 94303
(650) 833-2000
--------------------------------------------------------------------------------
(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)
April 30, 2009
--------------------------------------------------------------------------------
(Date of Event which Requires Filing of this Statement)
If the filing person has previously filed a statement on Schedule 13G to report
the acquisition that is the subject of this Schedule 13D and is filing this
schedule because of ss.ss. 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the
following box [ ].
--------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON
The D3 Family Fund, L.P.
--------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [X]
(b) [_]
--------------------------------------------------------------------------------
3 SEC USE ONLY
--------------------------------------------------------------------------------
4 SOURCE OF FUNDS*
WC
--------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2(d) OR 2(e) [_]
--------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Washington
--------------------------------------------------------------------------------
7 SOLE VOTING POWER
0
-----------------------------------------------------------------
NUMBER OF 8 SHARED VOTING POWER
SHARES
BENEFICIALLY 550,291 Common shares (2.0%)
OWNED BY -----------------------------------------------------------------
EACH 9 SOLE DISPOSITIVE POWER
REPORTING
PERSON 0
WITH -----------------------------------------------------------------
10 SHARED DISPOSITIVE POWER
550,291
--------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
For the reporting person listed on this page, 550,291; for all reporting
persons as a group, 3,602,044 shares (12.9%)
--------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [_]
--------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
12.9%
--------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*
PN
--------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
2
--------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON
The D3 Family Bulldog Fund, L.P.
--------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [X]
(b) [_]
--------------------------------------------------------------------------------
3 SEC USE ONLY
--------------------------------------------------------------------------------
4 SOURCE OF FUNDS*
WC
--------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2(d) OR 2(e) [_]
--------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Washington
--------------------------------------------------------------------------------
7 SOLE VOTING POWER
0
-----------------------------------------------------------------
NUMBER OF 8 SHARED VOTING POWER
SHARES
BENEFICIALLY 2,339,995 common shares (8.4%)
OWNED BY -----------------------------------------------------------------
EACH 9 SOLE DISPOSITIVE POWER
REPORTING
PERSON 0
WITH -----------------------------------------------------------------
10 SHARED DISPOSITIVE POWER
2,339,995
--------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
For the reporting person listed on this page, 2,339,995; for all reporting
persons as a group, 3,602,044 shares (12.9%)
--------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [_]
--------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
12.9%
--------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*
PN
--------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
3
--------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON
The D3 Family Canadian Fund, L.P.
--------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [X]
(b) [_]
--------------------------------------------------------------------------------
3 SEC USE ONLY
--------------------------------------------------------------------------------
4 SOURCE OF FUNDS*
WC
--------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2(d) OR 2(e) [_]
--------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Washington
--------------------------------------------------------------------------------
7 SOLE VOTING POWER
0
-----------------------------------------------------------------
NUMBER OF 8 SHARED VOTING POWER
SHARES
BENEFICIALLY 129,931 common shares (0.5%)
OWNED BY -----------------------------------------------------------------
EACH 9 SOLE DISPOSITIVE POWER
REPORTING
PERSON 0
WITH -----------------------------------------------------------------
10 SHARED DISPOSITIVE POWER
129,931
--------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
For the reporting person listed on this page, 129,931; for all reporting
persons as a group, 3,602,044 shares (12.9%)
--------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [_]
--------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
12.9%
--------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*
PN
--------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
4
--------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON
The DIII Offshore Fund, L.P.
--------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [X]
(b) [_]
--------------------------------------------------------------------------------
3 SEC USE ONLY
--------------------------------------------------------------------------------
4 SOURCE OF FUNDS*
WC
--------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2(d) OR 2(e) [_]
--------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Bahamas
--------------------------------------------------------------------------------
7 SOLE VOTING POWER
0
-----------------------------------------------------------------
NUMBER OF 8 SHARED VOTING POWER
SHARES
BENEFICIALLY 581,827 common shares (2.1%)
OWNED BY -----------------------------------------------------------------
EACH 9 SOLE DISPOSITIVE POWER
REPORTING
PERSON 0
WITH -----------------------------------------------------------------
10 SHARED DISPOSITIVE POWER
581,827
--------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
For the reporting person listed on this page, 581,827; for all reporting
persons as a group, 3,602,044 shares (12.9%)
--------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [_]
--------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
12.9%
--------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*
PN
--------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
5
--------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON
Nierenberg Investment Management Company, Inc.
--------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [X]
(b) [_]
--------------------------------------------------------------------------------
3 SEC USE ONLY
--------------------------------------------------------------------------------
4 SOURCE OF FUNDS*
AF
--------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2(d) OR 2(e) [_]
--------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Washington
--------------------------------------------------------------------------------
7 SOLE VOTING POWER
0
-----------------------------------------------------------------
NUMBER OF 8 SHARED VOTING POWER
SHARES
BENEFICIALLY 3,602,044 shares (12.9%)
OWNED BY -----------------------------------------------------------------
EACH 9 SOLE DISPOSITIVE POWER
REPORTING
PERSON 0
WITH -----------------------------------------------------------------
10 SHARED DISPOSITIVE POWER
3,602,044 shares
--------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
For the reporting person listed on this page, 3,602,044; for all reporting
persons as a group, 3,602,044 shares (12.9%)
--------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [_]
--------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
12.9%
--------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*
CO
--------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
6
--------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON
Nierenberg Investment Management Offshore, Inc.
--------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [X]
(b) [_]
--------------------------------------------------------------------------------
3 SEC USE ONLY
--------------------------------------------------------------------------------
4 SOURCE OF FUNDS*
AF
--------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2(d) OR 2(e) [_]
--------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Bahamas
--------------------------------------------------------------------------------
7 SOLE VOTING POWER
0
-----------------------------------------------------------------
NUMBER OF 8 SHARED VOTING POWER
SHARES
BENEFICIALLY 581,827 common shares (2.1%)
OWNED BY -----------------------------------------------------------------
EACH 9 SOLE DISPOSITIVE POWER
REPORTING
PERSON 0
WITH -----------------------------------------------------------------
10 SHARED DISPOSITIVE POWER
581,827 common shares
--------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
For the reporting person listed on this page, 581,827; for all reporting
persons as a group, 3,602,044 shares (12.9%)
--------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [_]
--------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
12.9%
--------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*
CO
--------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
7
--------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON
David Nierenberg
--------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [X]
(b) [_]
--------------------------------------------------------------------------------
3 SEC USE ONLY
--------------------------------------------------------------------------------
4 SOURCE OF FUNDS*
AF
--------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2(d) OR 2(e) [_]
--------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Washington
--------------------------------------------------------------------------------
7 SOLE VOTING POWER
0
-----------------------------------------------------------------
NUMBER OF 8 SHARED VOTING POWER
SHARES
BENEFICIALLY 3,602,044 common shares (12.9%)
OWNED BY -----------------------------------------------------------------
EACH 9 SOLE DISPOSITIVE POWER
REPORTING
PERSON 0
WITH -----------------------------------------------------------------
10 SHARED DISPOSITIVE POWER
3,602,044
--------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
For the reporting person listed on this page, 3,602,044; for all reporting
persons as a group, 3,602,044 shares (12.9%)
--------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [_]
--------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
12.9%
--------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*
IN
--------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
8
This Amendment No. 12 to Schedule 13D (this "Amendment") amends the
below-indicated Item from the Schedule 13D (the "Schedule 13D") previously filed
by or on behalf of the undersigned parties (the "Reporting Persons") by
supplementing such Item with the information below:
Item 5. Interest in Securities of the Issuer.
(a, b) The Reporting Persons, in the aggregate, beneficially own 3,602,044
Shares, constituting approximately 12.9% of the outstanding Shares.
(c) During the past 60 days the following sales of Shares were made by the
Reporting Persons named below in open market transactions:
Fund Transaction Date Shares Sold Price
---- ---------------- ----------- -----
DIII Offshore Fund, LP 03/16/2009 18,100 7.73
DIII Offshore Fund, LP 03/17/2009 62,800 7.62
DIII Offshore Fund, LP 03/18/2009 69,100 8.11
DIII Offshore Fund, LP 03/27/2009 35,454 9.14
D3 Family Fund, LP 03/31/2009 18,000 8.69
DIII Offshore Fund, LP 03/31/2009 27,800 8.69
D3 Family Fund, LP 04/30/2009 134,000 8.90
D3 Family Bulldog Fund, LP 04/30/2009 230,000 8.90
DIII Offshore Fund, LP 04/30/2009 136,000 8.90
9
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, each of the
undersigned certifies that the information set forth in the Statement is true,
complete and correct.
D3 Family Fund, L.P., D3 Bulldog Fund,
L.P., and D3 Family Canadian Fund, L.P.
By: Nierenberg Investment Management
Company, Inc.
Its: General Partner
May 1, 2009 By: /s/ David Nierenberg
------------------------- -----------------------------------------
David Nierenberg, President
DIII Offshore Fund, L.P.
By: Nierenberg Investment Management
Offshore, Inc.
Its: General Partner
May 1, 2009 By: /s/ David Nierenberg
------------------------- -----------------------------------------
David Nierenberg, President
Nierenberg Investment Management
Company, Inc.
May 1, 2009 By: /s/ David Nierenberg
------------------------- -----------------------------------------
David Nierenberg, President
Nierenberg Investment Management
Offshore, Inc.
May 1, 2009 By: /s/ David Nierenberg
------------------------- -----------------------------------------
David Nierenberg, President
May 1, 2009 /s/ David Nierenberg
------------------------- -----------------------------------------
David Nierenberg
10