t75627_sc13da.htm
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D
(Rule 13d-101)
 
INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED
PURSUANT TO § 240.13d-2(a)
 
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 3)*
 
AtriCure, Inc.
(Name of Issuer)
 
Common Stock, $0.001 par value per share
(Title of Class of Securities)
 
04963C209
(CUSIP Number)
 
Michael R. Murphy
Discovery Group I, LLC
191 North Wacker Drive
Suite 1685
Chicago, Illinois 60606
Telephone Number: (312) 265-9600
(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)
 
February 13, 2013
(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 §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. o
 
Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties to whom copies are to be sent.
 
*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.  04963C209
 
 
1.
Names of Reporting Persons.
Discovery Equity Partners, L.P.
 
 
2.
Check the Appropriate Box if a Member of a Group (See Instructions)
   
(a)
 o
   
(b)
 o
 
 
3.
SEC Use Only
 
 
4.
Source of Funds (See Instructions)
WC
 
 
5.
Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)     o
 
 
6.
Citizenship or Place of Organization
Illinois
 
Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With
7.
Sole Voting Power
None.
 
8.
Shared Voting Power
1,454,971
 
9.
Sole Dispositive Power
None.
 
10.
Shared Dispositive Power
1,454,971
 
 
11.
Aggregate Amount Beneficially Owned by Each Reporting Person
1,454,971
 
 
12.
Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)   o
 
 
13.
Percent of Class Represented by Amount in Row (11)
8.6%
 
 
14.
Type of Reporting Person (See Instructions)
PN
 
 
 
 
 
CUSIP No.  04963C209
 
 
1.
Names of Reporting Persons.
Discovery Group I, LLC
 
 
2.
Check the Appropriate Box if a Member of a Group (See Instructions)
   
(a)
 o
   
(b)
 o
 
 
3.
SEC Use Only
 
 
4.
Source of Funds (See Instructions)
AF
 
 
5.
Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)     o
 
 
6.
Citizenship or Place of Organization
Delaware
 
Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With
7.
Sole Voting Power
None.
 
8.
Shared Voting Power
1,454,971
 
9.
Sole Dispositive Power
None.
 
10.
Shared Dispositive Power
1,454,971
 
 
11.
Aggregate Amount Beneficially Owned by Each Reporting Person
1,454,971
 
 
12.
Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)   o
 
 
13.
Percent of Class Represented by Amount in Row (11)
8.6%
 
 
14.
Type of Reporting Person (See Instructions)
IA
 
 
 
 
 
CUSIP No.  04963C209
 
 
1.
Names of Reporting Persons.
Daniel J. Donoghue
 
 
2.
Check the Appropriate Box if a Member of a Group (See Instructions)
   
(a)
 o
   
(b)
 o
 
 
3.
SEC Use Only
 
 
4.
Source of Funds (See Instructions)
AF
 
 
5.
Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)     o
 
 
6.
Citizenship or Place of Organization
United States of America
 
Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With
7.
Sole Voting Power
None.
 
8.
Shared Voting Power
1,454,971
 
9.
Sole Dispositive Power
None.
 
10.
Shared Dispositive Power
1,454,971
 
 
11.
Aggregate Amount Beneficially Owned by Each Reporting Person
1,454,971
 
 
12.
Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)   o
 
 
13.
Percent of Class Represented by Amount in Row (11)
8.6%
 
 
14.
Type of Reporting Person (See Instructions)
IN
 
 
 
 
 
CUSIP No.  04963C209
 
 
1.
Names of Reporting Persons.
Michael R. Murphy
 
 
2.
Check the Appropriate Box if a Member of a Group (See Instructions)
   
(a)
 o
   
(b)
 o
 
 
3.
SEC Use Only
 
 
4.
Source of Funds (See Instructions)
AF
 
 
5.
Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)     o
 
 
6.
Citizenship or Place of Organization
United States of America
 
Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With
7.
Sole Voting Power
None.
 
8.
Shared Voting Power
1,454,971
 
9.
Sole Dispositive Power
None.
 
10.
Shared Dispositive Power
1,454,971
 
 
11.
Aggregate Amount Beneficially Owned by Each Reporting Person
1,454,971
 
 
12.
Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)   o
 
 
13.
Percent of Class Represented by Amount in Row (11)
8.6%
 
 
14.
Type of Reporting Person (See Instructions)
IN
 
 
 
 
 
Item 1.
Security and Issuer
   
 
This Amendment No. 3 to Schedule 13D (“Amendment No. 3”) relates to the Common Stock, $0.001 par value per share (the “Common Stock”), of AtriCure, Inc., a Delaware corporation (the “Company”), which has its principal executive offices at 6217 Centre Park Drive, West Chester, Ohio 45069. This Amendment No. 3 amends and supplements, as set forth below, the information contained in items 1, 3, 4, 5 and 6 of the Schedule 13D filed by the Reporting Persons with respect to the Company on September 10, 2010, as amended by Amendment No. 1 thereto filed by the Reporting Persons with respect to the Company on September 27, 2010, and Amendment No. 2 thereto filed by the Reporting Persons with respect to the Company on December 19, 2012 (as so amended, the “Schedule 13D”). All capitalized terms used herein but not defined herein have the meanings set forth in the Schedule 13D. Except as amended by this Amendment No. 3, all information contained in the Schedule 13D is, after reasonable inquiry and to the best of the Reporting Persons’ knowledge and belief, true, complete and correct as of the date of this Amendment No. 3.
   
Item 3.
Source and Amount of Funds or Other Consideration
   
 
Item 3 of the Schedule 13D is hereby amended to read in its entirety as follows:
   
 
The total purchase price for the 1,454,971 shares of Common Stock beneficially owned by the Reporting Persons as of February 14, 2013 was approximately $10,998,074.  The source of such funds was the assets of Discovery Equity Partners, including proceeds of margin loans under margin loan facilities maintained in the ordinary course of business by Discovery Equity Partners with a broker on customary terms and conditions.  Discovery Equity Partners is the legal owner of all of the Common Stock beneficially owned by Discovery Group and Messrs. Donoghue and Murphy.
 
Item 4.
Purpose of Transaction
   
 
The first sentence of Item 4 of the Schedule 13D is hereby amended to read as follows:
   
 
The Reporting Persons acquired beneficial ownership of the shares of Common Stock reported herein as part of their investment activities on behalf of Discovery Equity Partners.
   
Item 5.
Interest in Securities of the Issuer
   
 
Item 5 of the Schedule 13D is hereby amended to read in its entirety as follows:

The information concerning percentages of ownership set forth below is based on 16,895,940 shares of Common Stock outstanding as of January 14, 2013 as reported in the Company’s Prospectus filed with the Securities Exchange Commission on January 16, 2013 pursuant to Rule 424(b)(5) under the Securities Act of 1933, as amended.

Discovery Equity Partners beneficially owns 1,454,971 shares of Common Stock as of February 14, 2013, which represents 8.6% of the outstanding Common Stock.

Discovery Group beneficially owns 1,454,971 shares of Common Stock as of February 14, 2013, which represents 8.6% of the outstanding Common Stock.

Mr. Donoghue beneficially owns 1,454,971 shares of Common Stock as of February 14, 2013, which represents 8.6% of the outstanding Common Stock.
 
 
 
 
 
   
 
Mr. Murphy beneficially owns 1,454,971 shares of Common Stock as of February 14, 2013, which represents 8.6% of the outstanding Common Stock.

Discovery Group is the sole general partner of Discovery Equity Partners.  Messrs. Donoghue and Murphy are the sole managing members of Discovery Group.  As a consequence, Discovery Group and Messrs. Donoghue and Murphy may be deemed to share beneficial ownership of all of the shares of Common Stock owned by Discovery Equity Partners.

The transactions in Common Stock effected by the Reporting Persons during the past 60 days are set out in Exhibit 1 hereto.

No person other than Discovery Equity Partners is known to any Reporting Person to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, any of the shares of Common Stock reported herein.
   
Item 6.
Contracts, Arrangements, Understandings or Relationships with Respect to Securities of the Issuer
   
  Item 6 of the Schedule 13D is hereby amended to read in its entirety as follows:
   
 
There are no contracts, arrangements, understandings or relationships (legal or otherwise) between or among any of the Reporting Persons and any other person with respect to any securities of the Company other than the governing documents of Discovery Group and Discovery Equity Partners, the margin loan facilities referred to under Item 3 above, the Joint Filing Agreements of the Reporting Persons with respect to the Schedule 13D that were included as exhibits thereto, the Joint Filing Agreement of the Reporting Persons with respect to this Amendment No. 3 included as Exhibit 2 to this Amendment No. 3, and the Powers of Attorney granted by Messrs. Donoghue and Murphy with respect to reports under Section 13 of the Securities Exchange Act of 1934, as amended, which Powers of Attorney are included as Exhibit 3 and Exhibit 4, respectively, to this Amendment No. 3.
 
Item 7.
Material to Be Filed as Exhibits
   
 
Exhibit 1:        List of transactions effected by the Reporting Persons in the Company’s Common Stock during the 60-day period preceding this filing.
   
 
Exhibit 2:        Joint Filing Agreement dated as of February 15, 2013, by and among Discovery Equity Partners; Discovery Group; Daniel J. Donoghue; and Michael R. Murphy.
   
 
Exhibit 3:        Power of Attorney of Daniel J. Donoghue, dated as of April 28, 2008.
   
 
Exhibit 4:        Power of Attorney of Michael R. Murphy, dated as of April 28, 2008.
 
 
 
 
 
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.
 
 
February 15, 2013
  
 
Date
  
     
 
DISCOVERY GROUP I, LLC,
for itself and as general partner of
DISCOVERY EQUITY PARTNERS, L.P.
  
     
 
By:  Michael R. Murphy*
  
 
Signature
  
 
 
Michael R. Murphy, Managing Member
  
 
Name/Title
  
     
 
Daniel J. Donoghue*
  
 
Signature
  
 
 
Daniel J. Donoghue
  
 
Name/Title
  
     
 
Michael R. Murphy*
  
 
Signature
  
 
 
Michael R. Murphy
  
 
Name/Title
  
     
 
*By: /s/ Mark Buckley
  
 
Mark Buckley
Attorney-in-Fact for Daniel J. Donoghue
Attorney-in-Fact for Michael R. Murphy
  
 
 
 
 
 
Exhibit Index
 
Exhibit 1
  
List of transactions effected by the Reporting Persons in the Company’s Common Stock during the 60-day period preceding this filing.
     
Exhibit 2
  
Joint Filing Agreement dated as of February 15, 2013, by and among Discovery Equity Partners; Discovery Group; Daniel J. Donoghue; and Michael R. Murphy.
     
Exhibit 3
  
Power of Attorney of Daniel J. Donoghue, dated as of April 28, 2008.
     
Exhibit 4
  
Power of Attorney of Michael R. Murphy, dated as of April 28, 2008.