Amendment #1 to Schedule 13(G)
 
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
 
 
SCHEDULE 13G
(Amendment No. 1)*
 
Under the Securities Exchange Act of 1934
 
 
 
Natus Medical, Inc.
(Name of Issuer)
 
 
Common Stock
(Title of Class of Securities)
 
639050 10 3
                                (CUSIP Number)                                
 
February 14, 2003
(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)
 
¨    Rule 13d-1(c)
 
x    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 8 pages

CUSIP No.
  
639050 10 3
    
 
  1.

  
Names of Reporting Persons.
SS or I.R.S. Identification Nos. of Above Persons
 
Trinity Ventures II, L.P.                    77-0213227
    
  2.
  
Check the Appropriate Box if a Member of a Group
(a)  x
(b)  ¨
    
  3.

  
SEC Use Only
 
    
  4.

  
Citizenship or Place of Organization
 
California, United States of America
    
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
  
  5.    Sole Voting Power
 
        -0-
  6.    Shared Voting Power
 
        -0-
  7.    Sole Dispositive Power
 
        -0-
  8.    Shared Dispositive Power
 
        -0-
  9.

  
Aggregate Amount Beneficially Owned by Each Reporting Person
 
None
    
10.

  
Check if the Aggregate Amount in Row (11) Excludes Certain Shares*
 
    
11.

  
Percent of Class Represented by Amount in Row (11)
 
0
    
12.

  
Type of Reporting Person
 
PN
    
 
*SEE INSTRUCTION BEFORE FILLING OUT!

Page 2 of 8 pages

CUSIP No.
  
639050 10 3
    
 
  1.

  
Names of Reporting Persons.
SS or I.R.S. Identification Nos. of Above Persons
 
Trinity Ventures III, L.P.                    94-3113455
    
  2.
  
Check the Appropriate Box if a Member of a Group
(a)  x
(b)  ¨
    
  3.

  
SEC Use Only
 
    
  4.

  
Citizenship or Place of Organization
 
California, United States of America
    
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
  
  5.    Sole Voting Power
 
        -0-
  6.    Shared Voting Power
 
        -0-
  7.    Sole Dispositive Power
 
        -0-
  8.    Shared Dispositive Power
 
        -0-
  9.

  
Aggregate Amount Beneficially Owned by Each Reporting Person
 
None
    
10.

  
Check if the Aggregate Amount in Row (11) Excludes Certain Shares*
 
    
11.

  
Percent of Class Represented by Amount in Row (11)
 
0
    
12.

  
Type of Reporting Person
 
PN
    
 
*SEE INSTRUCTION BEFORE FILLING OUT!

Page 3 of 8 pages

CUSIP No.
  
639050 10 3
    
 
  1.

  
Names of Reporting Persons.
SS or I.R.S. Identification Nos. of Above Persons
 
Trinity Side-By-Side Fund I, L.P.                    94-3125683
    
  2.
  
Check the Appropriate Box if a Member of a Group
(a)  x
(b)  ¨
    
  3.

  
SEC Use Only
 
    
  4.

  
Citizenship or Place of Organization
 
California, United States of America
    
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
  
  5.    Sole Voting Power
 
        -0-
  6.    Shared Voting Power
 
        -0-
  7.    Sole Dispositive Power
 
        -0-
  8.    Shared Dispositive Power
 
        -0-
  9.

  
Aggregate Amount Beneficially Owned by Each Reporting Person
 
None
    
10.

  
Check if the Aggregate Amount in Row (11) Excludes Certain Shares*
 
    
11.

  
Percent of Class Represented by Amount in Row (11)
 
0
    
12.

  
Type of Reporting Person
 
PN
    
 
*SEE INSTRUCTION BEFORE FILLING OUT!
 

Page 4 of 8 pages

 
Item 1.
 
(a)
 
Name of Issuer:    Natus Medical, Inc. (“Issuer”)
 
(b)
 
Address of Issuer’s Principal Executive Offices:
 
    
 
1501 Industrial Road
    
 
San Carlos, CA 94070
 
Item 2.
 
(a)
 
Name of Person Filing:
 
    
 
Trinity Ventures on behalf of
    
 
Trinity Ventures II, L.P. (“Trinity II”),
    
 
Trinity Ventures III, L.P. (“Trinity III”), and
    
 
Trinity Side-By-Side Fund I, L.P. (“Trinity SBS I”)
 
(b)
 
Address of Principal Business Office:
 
    
 
c/o Trinity Ventures
    
 
3000 Sand Hill Road
    
 
Building 4, Suite 160
    
 
Menlo Park, CA 94025
 
(c)
 
Citizenship/Place of Organization:
 
    
 
Trinity Ventures — California
    
 
Trinity II — California
    
 
Trinity III — California
    
 
Trinity SBS I — California
 
(d)
 
Title of Class of Securities:    Common Stock
 
(e)
 
CUSIP Number:    639050 10 3
 
Item 3.
 
Not applicable.

Page 5 of 8 pages

 
Item 4.    Ownership.
 
         
Trinity II
   
Trinity III
   
Trinity SBS I
(a)
   
Beneficial Ownership
   
-0-
   
-0-
   
-0-
(b)
   
Percentage of Class
   
-0-
   
-0-
   
-0-
(c)(i)
   
Sole Voting Power
   
-0-
   
-0-
   
-0-
    (ii)
   
Shared Voting Power
   
-0-
   
-0-
   
-0-
    (iii)
   
Sole Dispositive Power
   
-0-
   
-0-
   
-0-
    (iv)
   
Shared Dispositive Power
   
-0-
   
-0-
   
-0-
 
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 class of securities, check the following:    x
 
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 the Group
 
No reporting person is a member of a group as defined in Section 240.13d-1(b)(1)(ii)(H) of the Act.
 
Item 9.    Notice of Dissolution of Group
 
Not applicable.
 
EXHIBIT(S):
 
A:    Joint Filing Statement

Page 6 of 8 pages

 
Item 10.    Certification
 
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:    January 15, 2003
 
 
 
Trinity Ventures II, L.P.
By:
  
Trinity TVL Partners, L.P.
   
its General Partner
By:
  
/s/    KATHLEEN A. MURPHY
   
Managing Member
 
 
 
 
Trinity Ventures III, L.P.
By:
  
Trinity TVL Partners, L.P.
   
its General Partner
By:
  
/s/    KATHLEEN A. MURPHY
   
Managing Member
 
 
 
 
Trinity Side-By-Side Fund I, L.P.
By:
  
Trinity TVL Partners, L.P.
   
its General Partner
By:
  
/s/    KATHLEEN A. MURPHY
   
Managing Member

Page 7 of 8 pages

 
Exhibit A
 
We, the undersigned, hereby express our agreement that the attached Schedule 13G is filed on behalf of us.
 
Date:    January 15, 2003
 
 
 
Trinity Ventures II, L.P.
By:
  
Trinity TVL Partners, L.P.
   
its General Partner
By:
  
/s/    KATHLEEN A. MURPHY
   
Managing Member
 
 
 
 
Trinity Ventures III, L.P.
By:
  
Trinity TVL Partners, L.P.
   
its General Partner
By:
  
/s/    KATHLEEN A. MURPHY
   
Managing Member
 
 
 
 
Trinity Side-By-Side Fund I, L.P.
By:
  
Trinity TVL Partners, L.P.
   
its General Partner
By:
  
/s/    KATHLEEN A. MURPHY
   
Managing Member

Page 8 of 8 pages