Ownership Submission
FORM 3
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  OAK INVESTMENT PARTNERS IX L P
2. Date of Event Requiring Statement (Month/Day/Year)
09/19/2007
3. Issuer Name and Ticker or Trading Symbol
ATHENAHEALTH INC [ATHN]
(Last)
(First)
(Middle)
C/O OAK INVESTMENT PARTNERS, ONE GORHAM ISLAND
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

WESTPORT, CT 06880
6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)
2. Amount of Securities Beneficially Owned
(Instr. 4)
3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)
4. Nature of Indirect Beneficial Ownership
(Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(Month/Day/Year)
3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)
4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)
6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Series A-1 preferred stock   (1)   (2) Common Stock 82,153 $ (1) D (3)  
Series A-1 preferred stock   (1)   (2) Common Stock 875 $ (1) D (4)  
Series A-1 preferred stock   (1)   (2) Common Stock 1,972 $ (1) D (5)  
Series D preferred stock   (1)   (2) Common Stock 4,207,013 $ (1) D (3)  
Series D preferred stock   (1)   (2) Common Stock 44,839 $ (1) D (4)  
Series D preferred stock   (1)   (2) Common Stock 100,980 $ (1) D (5)  
Series E preferred stock   (1)   (2) Common Stock 168,776 $ (1) D (3)  
Series E preferred stock   (1)   (2) Common Stock 1,798 $ (1) D (4)  
Series E preferred stock   (1)   (2) Common Stock 4,052 $ (1) D (5)  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
OAK INVESTMENT PARTNERS IX L P
C/O OAK INVESTMENT PARTNERS
ONE GORHAM ISLAND
WESTPORT, CT 06880
    X    
OAK IX AFFILIATES FUND LP
C/O OAK INVESTMENT PARTNERS
ONE GORHAM ISLAND
WESTPORT, CT 06880
    X    
OAK IX AFFILIATES FUND A LP
C/O OAK INVESTMENT PARTNERS
ONE GORHAM ISLAND
WESTPORT, CT 06880
    X    

Signatures

/s/ Christopher E. Nolin Attorney-in-Fact for all Reporting Persons 09/19/2007
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) These shares will automatically convert into common stock on a one-for-one basis upon the closing of the Issuer's initial public offering of common stock.
(2) The preferred stock has no expiration date.
(3) Represents shares directly owned by Oak Investment Partners IX, L.P. ("Oak IX, L.P.").
(4) Represents shares directly owned by Oak IX Affiliates Fund, L.P. ("Oak IX Affiliates, L.P.").
(5) Represents shares owned directly by Oak IX Affiliates Fund-A, L.P. ("Oak IX Affiliates A, L.P.").
 
Remarks:
Oak IX Affiliates, L.P. and Oak IX Affiliates A, L.P. are filing this report on a precautionary basis because they may be deemed to be included in a "group" with Oak IX, L.P., which is a Reporting Person with respect to the Issuer. Oak Associates IX, L.L.C. is the General Partner of Oak IX, L.P. and Oak IX Affiliates, L.L.C. is the General Partner of Oak IX Affiliates, L.P. and Oak IX Affiliates A, L.P.  Each Reporting Person and each of the persons described in this footnote disclaims the existence of a "group" and disclaims beneficial ownership of any securities (except to such Reporting Person's pecuniary interest in such securities) of the Issuer and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of any such securities for purposes of Section 16 or for any other purpose.

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