SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

o

Rule 13d-1(b)

o

Rule 13d-1(c)

x

Rule 13d-1(d)

CUSIP No. 30064K105

Schedule 13G

1

Name of Reporting Person:
I.R.S. Identification No. of Above Person (Entities Only):

Battery Ventures VIII, L.P. (“BV8”)

2

Check the Appropriate Box if a Member of a Group*

(a)

o

(b)

x

3

SEC Use Only

4

Citizenship or Place of Organization
Delaware

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
2,255,992 shares, except that Battery Partners VIII, LLC (“BP8 LLC”), the sole general partner of BV8, and its investment advisor Battery Management Corp. (“BMC,” and together with BP8 LLC, the “Battery VIII Companies”), may be deemed to have sole power to vote these shares; Neeraj Agrawal (“Agrawal”), a managing member or officer of the Battery VIII Companies, may be deemed to have shared power to vote these shares; Michael Brown (“Brown”), a managing member or officer of the Battery VIII Companies, may be deemed to have shared power to vote these shares; Thomas J. Crotty (“Crotty”), a managing member or officer of the Battery VIII Companies, may be deemed to have shared power to vote these shares; Richard D. Frisbie (“Frisbie”), a managing member or officer of the Battery VIII Companies, may be deemed to have shared power to vote these shares; Kenneth P. Lawler (“Lawler”), a managing member or officer of the Battery VIII Companies, may be deemed to have shared power to vote these shares; Roger H. Lee (“Lee”), a managing member or officer of the Battery VIII Companies, may be deemed to have shared power to vote these shares; R. David Tabors (“Tabors”), a managing member or officer of the Battery VIII Companies, may be deemed to have shared power to vote these shares; and Scott R. Tobin (“Tobin”), a managing member or officer of the Battery VIII Companies, may be deemed to have shared power to vote these shares.

6

Shared Voting Power
See response to row 5

7

Sole Dispositive Power
2,255,992 shares, except that the Battery VIII Companies, may be deemed to have sole dispositive power with respect to these shares; Agrawal, a managing member or officer of the Battery VIII Companies, may be deemed to have shared dispositive power with respect to these shares; Brown, a managing member or officer of the Battery VIII Companies, may be deemed to have shared dispositive power with respect to these shares; Crotty, a managing member or officer of the Battery VIII Companies, may be deemed to have shared dispositive power with respect to these shares; Frisbie, a managing member or officer of the Battery VIII Companies, may be deemed to have shared dispositive power with respect to these shares; Lawler, a managing member or officer of the Battery VIII Companies, may be deemed to have shared dispositive power with respect to these shares; Lee, a managing member or officer of the Battery VIII Companies, may be deemed to have shared dispositive power with respect to these shares; Tabors, a managing member or officer of the Battery VIII Companies, may be deemed to have shared dispositive power with respect to these shares; and Tobin, a managing member or officer of the Battery VIII Companies, may be deemed to have shared dispositive power with respect to these shares.

8

Shared Dispositive Power
See response to row 7

9

Aggregate Amount Beneficially Owned by Each Reporting Person
2,255,992 shares

10

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares*  o

11

Percent of Class Represented by Amount in Row 9
3.3%

12

Type of Reporting Person*
PN

CUSIP No. 30064K105

Schedule 13G

1

Name of Reporting Person:
I.R.S. Identification No. of Above Person (Entities Only):

Battery Partners VIII, LLC

2

Check the Appropriate Box if a Member of a Group*

(a)

o

(b)

x

3

SEC Use Only

4

Citizenship or Place of Organization
Delaware

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
2,255,992 shares, of which all 2,255,992 are directly owned by BV8, except that Agrawal, a managing member or officer of the Battery VIII Companies, may be deemed to have shared power to vote these shares; Brown, a managing member or officer of the Battery VIII Companies, may be deemed to have shared power to vote these shares; Crotty, a managing member or officer of the Battery VIII Companies, may be deemed to have shared power to vote these shares; Frisbie, a managing member or officer of the Battery VIII Companies, may be deemed to have shared power to vote these shares; Lawler, a managing member or officer of the Battery VIII Companies, may be deemed to have shared power to vote these shares; Lee, a managing member or officer of the Battery VIII Companies, may be deemed to have shared power to vote these shares; Tabors, a managing member or officer of the Battery VIII Companies, may be deemed to have shared power to vote these shares; and Tobin, a managing member or officer of the Battery VIII Companies, may be deemed to have shared power to vote these shares.

6

Shared Voting Power
See response to row 5

7

Sole Dispositive Power
2,255,992 shares, of which all 2,255,992 are directly owned by BV8, except that Agrawal, a managing member or officer of the Battery VIII Companies, may be deemed to have shared dispositive power with respect to these shares; Brown, a managing member or officer of the Battery VIII Companies, may be deemed to have shared dispositive power with respect to these shares; Crotty, a managing member or officer of the Battery VIII Companies, may be deemed to have shared dispositive power with respect to these shares; Frisbie, a managing member or officer of the Battery VIII Companies, may be deemed to have shared dispositive power with respect to these shares; Lawler, a managing member or officer of the Battery VIII Companies, may be deemed to have shared dispositive power with respect to these shares; Lee, a managing member or officer of the Battery VIII Companies, may be deemed to have shared dispositive power with respect to these shares; Tabors, a managing member or officer of the Battery VIII Companies, may be deemed to have shared dispositive power with respect to these shares; and Tobin, a managing member or officer of the Battery VIII Companies, may be deemed to have shared dispositive power with respect to these shares.

8

Shared Dispositive Power
See response to row 7

9

Aggregate Amount Beneficially Owned by Each Reporting Person
2,255,992 shares

10

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares*  o

11

Percent of Class Represented by Amount in Row 9
3.3%

12

Type of Reporting Person*
OO

CUSIP No. 30064K105

Schedule 13G

1

Name of Reporting Person:
I.R.S. Identification No. of Above Person (Entities Only):

Battery Ventures VIII Side Fund, L.P. (“BV8 SF”)

2

Check the Appropriate Box if a Member of a Group*

(a)

o

(b)

x

3

SEC Use Only

4

Citizenship or Place of Organization
Delaware

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
2,255,992 shares, except that Battery Partners VIII Side Fund, LLC (“BP8 SF LLC”), the sole general partner of BV8 SF, and its investment advisor BMC (together with BP8 SF LLC, the “Battery VIII SF Companies”), may be deemed to have sole power to vote these shares; Agrawal, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared power to vote these shares; Brown, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared power to vote these shares; Crotty, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared power to vote these shares; Frisbie, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared power to vote these shares; Lawler, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared power to vote these shares; Lee, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared power to vote these shares; Tabors, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared power to vote these shares; and Tobin, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared power to vote these shares.

6

Shared Voting Power
See response to row 5

7

Sole Dispositive Power
2,255,992 shares, except that the Battery VIII SF Companies, may be deemed to have sole dispositive power with respect to these shares; Agrawal, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared dispositive power with respect to these shares; Brown, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared dispositive power with respect to these shares; Crotty, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared dispositive power with respect to these shares; Frisbie, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared dispositive power with respect to these shares; Lawler, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared dispositive power with respect to these shares; Lee, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared dispositive power with respect to these shares; Tabors, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared dispositive power with respect to these shares; and Tobin, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared dispositive power with respect to these shares.

8

Shared Dispositive Power
See response to row 7

9

Aggregate Amount Beneficially Owned by Each Reporting Person
2,255,992 shares

10

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares*  o

11

Percent of Class Represented by Amount in Row 9
3.3%

12

Type of Reporting Person*
PN

CUSIP No. 30064K105

Schedule 13G

1

Name of Reporting Person:
I.R.S. Identification No. of Above Person (Entities Only):

Battery Partners VIII Side Fund, LLC

2

Check the Appropriate Box if a Member of a Group*

(a)

o

(b)

x

3

SEC Use Only

4

Citizenship or Place of Organization
Delaware

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
2,255,992 shares, of which all 2,255,992 are directly owned by BV8 SF, except that Agrawal, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared power to vote these shares; Brown, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared power to vote these shares; Crotty, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared power to vote these shares; Frisbie, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared power to vote these shares; Lawler, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared power to vote these shares; Lee, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared power to vote these shares; Tabors, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared power to vote these shares; and Tobin, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared power to vote these shares.

6

Shared Voting Power
See response to row 5

7

Sole Dispositive Power
2,255,992 shares, of which all 2,255,992 are directly owned by BV8 SF, except that Agrawal, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared dispositive power with respect to these shares; Brown, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared dispositive power with respect to these shares; Crotty, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared dispositive power with respect to these shares; Frisbie, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared dispositive power with respect to these shares; Lawler, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared dispositive power with respect to these shares; Lee, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared dispositive power with respect to these shares; Tabors, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared dispositive power with respect to these shares; and Tobin, a managing member or officer of the Battery VIII SF Companies, may be deemed to have shared dispositive power with respect to these shares.

8

Shared Dispositive Power
See response to row 7

9

Aggregate Amount Beneficially Owned by Each Reporting Person
2,255,992 shares

10

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares*  o

11

Percent of Class Represented by Amount in Row 9
3.3%

12

Type of Reporting Person*
OO

CUSIP No. 30064K105

Schedule 13G

1

Name of Reporting Person:
I.R.S. Identification No. of Above Person (Entities Only):

Battery Management Company, LLC (“BMC LLC”)

2

Check the Appropriate Box if a Member of a Group*

(a)

o

(b)

x

3

SEC Use Only

4

Citizenship or Place of Organization
Delaware

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
20,000 shares, except that Crotty may be deemed to have sole power to vote these shares.

6

Shared Voting Power
See response to row 5

7

Sole Dispositive Power
20,000 shares, except that Crotty may be deemed to have sole dispositive power with respect to these shares.

8

Shared Dispositive Power
See response to row 7

9

Aggregate Amount Beneficially Owned by Each Reporting Person
20,000 shares

10

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares*  o

11

Percent of Class Represented by Amount in Row 9
0.1%

12

Type of Reporting Person*
OO

CUSIP No. 30064K105

Schedule 13G

1

Name of Reporting Person:
I.R.S. Identification No. of Above Person (Entities Only):

Neeraj Agrawal

2

Check the Appropriate Box if a Member of a Group*

(a)

o

(b)

x

3

SEC Use Only

4

Citizenship or Place of Organization
USA

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
4,511,984 shares, of which 2,255,992 are directly owned by BV8 and 2,255,992 are directly owned by BV8 SF.  Agrawal is a managing member or officer of the Battery VIII Companies, and may be deemed to have shared power to vote the BV8 shares.  Agrawal is a managing member or officer of the Battery VIII SF Companies, and may be deemed to have shared power to vote the BV8 SF shares.

6

Shared Voting Power
See response to row 5

7

Sole Dispositive Power
4,511,984 shares, of which 2,255,992 are directly owned by BV8 and 2,255,992 are directly owned by BV8 SF.  Agrawal is a managing member or officer of the Battery VIII Companies, and may be deemed to have shared dispositive power with respect to the BV8 shares.  Agrawal is a managing member or officer of the Battery VIII SF Companies, and may be deemed to have shared dispositive power with respect to the BV8 SF shares.

8

Shared Dispositive Power
See response to row 7

9

Aggregate Amount Beneficially Owned by Each Reporting Person
4,511,984 shares

10

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares*  o

11

Percent of Class Represented by Amount in Row 9
6.6%

12

Type of Reporting Person*
IN

CUSIP No. 30064K105

Schedule 13G

1

Name of Reporting Person:
I.R.S. Identification No. of Above Person (Entities Only):

Michael Brown

2

Check the Appropriate Box if a Member of a Group*

(a)

o

(b)

x

3

SEC Use Only

4

Citizenship or Place of Organization
USA

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
4,511,984 shares, of which 2,255,992 are directly owned by BV8 and 2,255,992 are directly owned by BV8 SF.  Brown is a managing member or officer of the Battery VIII Companies, and may be deemed to have shared power to vote the BV8 shares.  Brown is a managing member or officer of the Battery VIII SF Companies, and may be deemed to have shared power to vote the BV8 SF shares.

6

Shared Voting Power
See response to row 5

7

Sole Dispositive Power
4,511,984 shares, of which 2,255,992 are directly owned by BV8 and 2,255,992 are directly owned by BV8 SF.  Brown is a managing member or officer of the Battery VIII Companies, and may be deemed to have shared dispositive power with respect to the BV8 shares.  Brown is a managing member or officer of the Battery VIII SF Companies, and may be deemed to have shared dispositive power with respect to the BV8 SF shares.

8

Shared Dispositive Power
See response to row 7

9

Aggregate Amount Beneficially Owned by Each Reporting Person
4,511,984 shares

10

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares*  o

11

Percent of Class Represented by Amount in Row 9
6.6%

12

Type of Reporting Person*
IN

CUSIP No. 30064K105

Schedule 13G

1

Name of Reporting Person:
I.R.S. Identification No. of Above Person (Entities Only):

Thomas J. Crotty

2

Check the Appropriate Box if a Member of a Group*

(a)

o

(b)

x

3

SEC Use Only

4

Citizenship or Place of Organization
USA

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
4,531,984 shares, of which 2,255,992 are directly owned by BV8, 2,255,992 are directly owned by BV8 SF and 20,000 are directly owned by BMC LLC.  Crotty is a managing member or officer of the Battery VIII Companies, and may be deemed to have shared power to vote the BV8 shares.  Crotty is a managing member or officer of the Battery VIII SF Companies, and may be deemed to have shared power to vote the BV8 SF shares.  Crotty may be deemed to have sole power to vote the BMC LLC shares.

6

Shared Voting Power
See response to row 5

7

Sole Dispositive Power
4,531,984 shares, of which 2,255,992 are directly owned by BV8, 2,255,992 are directly owned by BV8 SF and 20,000 are directly owned by BMC LLC.  Crotty is a managing member or officer of the Battery VIII Companies, and may be deemed to have shared dispositive power with respect to the BV8 shares.  Crotty is a managing member or officer of the Battery VIII SF Companies, and may be deemed to have shared dispositive power with respect to the BV8 SF shares.  Crotty may be deemed to have sole dispositive power with respect to the BMC LLC shares.

8

Shared Dispositive Power
See response to row 7

9

Aggregate Amount Beneficially Owned by Each Reporting Person
4,531,984 shares

10

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares*  o

11

Percent of Class Represented by Amount in Row 9
6.6%

12

Type of Reporting Person*
IN

CUSIP No. 30064K105

Schedule 13G

1

Name of Reporting Person:
I.R.S. Identification No. of Above Person (Entities Only):

Richard D. Frisbie

2

Check the Appropriate Box if a Member of a Group*

(a)

o

(b)

x

3

SEC Use Only

4

Citizenship or Place of Organization
USA

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
4,511,984 shares, of which 2,255,992 are directly owned by BV8 and 2,255,992 are directly owned by BV8 SF.  Frisbie is a managing member or officer of the Battery VIII Companies, and may be deemed to have shared power to vote the BV8 shares.  Frisbie is a managing member or officer of the Battery VIII SF Companies, and may be deemed to have shared power to vote the BV8 SF shares.

6

Shared Voting Power
See response to row 5

7

Sole Dispositive Power
4,511,984 shares, of which 2,255,992 are directly owned by BV8 and 2,255,992 are directly owned by BV8 SF.  Frisbie is a managing member or officer of the Battery VIII Companies, and may be deemed to have shared dispositive power with respect to the BV8 shares.  Frisbie is a managing member or officer of the Battery VIII SF Companies, and may be deemed to have shared dispositive power with respect to the BV8 SF shares.

8

Shared Dispositive Power
See response to row 7

9

Aggregate Amount Beneficially Owned by Each Reporting Person
4,511,984 shares

10

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares*  o

11

Percent of Class Represented by Amount in Row 9
6.6%

12

Type of Reporting Person*
IN

CUSIP No. 30064K105

Schedule 13G

1

Name of Reporting Person:
I.R.S. Identification No. of Above Person (Entities Only):

Kenneth P. Lawler

2

Check the Appropriate Box if a Member of a Group*

(a)

o

(b)

x

3

SEC Use Only

4

Citizenship or Place of Organization
USA

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
4,511,984 shares, of which 2,255,992 are directly owned by BV8 and 2,255,992 are directly owned by BV8 SF.  Lawler is a managing member or officer of the Battery VIII Companies, and may be deemed to have shared power to vote the BV8 shares.  Lawler is a managing member or officer of the Battery VIII SF Companies, and may be deemed to have shared power to vote the BV8 SF shares.

6

Shared Voting Power
See response to row 5

7

Sole Dispositive Power
4,511,984 shares, of which 2,255,992 are directly owned by BV8 and 2,255,992 are directly owned by BV8 SF.  Lawler is a managing member or officer of the Battery VIII Companies, and may be deemed to have shared dispositive power with respect to the BV8 shares.  Lawler is a managing member or officer of the Battery VIII SF Companies, and may be deemed to have shared dispositive power with respect to the BV8 SF shares.

8

Shared Dispositive Power
See response to row 7

9

Aggregate Amount Beneficially Owned by Each Reporting Person
4,511,984 shares

10

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares*  o

11

Percent of Class Represented by Amount in Row 9
6.6%

12

Type of Reporting Person*
IN

CUSIP No. 30064K105

Schedule 13G

1

Name of Reporting Person:
I.R.S. Identification No. of Above Person (Entities Only):

Roger H. Lee

2

Check the Appropriate Box if a Member of a Group*

(a)

o

(b)

x

3

SEC Use Only

4

Citizenship or Place of Organization
USA

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
4,511,984 shares, of which 2,255,992 are directly owned by BV8 and 2,255,992 are directly owned by BV8 SF.  Lee is a managing member or officer of the Battery VIII Companies, and may be deemed to have shared power to vote the BV8 shares.  Lee is a managing member or officer of the Battery VIII SF Companies, and may be deemed to have shared power to vote the BV8 SF shares.

6

Shared Voting Power
See response to row 5

7

Sole Dispositive Power
4,511,984 shares, of which 2,255,992 are directly owned by BV8 and 2,255,992 are directly owned by BV8 SF.  Lee is a managing member or officer of the Battery VIII Companies, and may be deemed to have shared dispositive power with respect to the BV8 shares.  Lee is a managing member or officer of the Battery VIII SF Companies, and may be deemed to have shared dispositive power with respect to the BV8 SF shares.

8

Shared Dispositive Power
See response to row 7

9

Aggregate Amount Beneficially Owned by Each Reporting Person
4,511,984 shares

10

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares*  o

11

Percent of Class Represented by Amount in Row 9
6.6%

12

Type of Reporting Person*
IN

CUSIP No. 30064K105

Schedule 13G

1

Name of Reporting Person:
I.R.S. Identification No. of Above Person (Entities Only):

R. David Tabors

2

Check the Appropriate Box if a Member of a Group*

(a)

o

(b)

x

3

SEC Use Only

4

Citizenship or Place of Organization
USA

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
4,511,984 shares, of which 2,255,992 are directly owned by BV8 and 2,255,992 are directly owned by BV8 SF.  Tabors is a managing member or officer of the Battery VIII Companies, and may be deemed to have shared power to vote the BV8 shares.  Tabors is a managing member or officer of the Battery VIII SF Companies, and may be deemed to have shared power to vote the BV8 SF shares.

6

Shared Voting Power
See response to row 5

7

Sole Dispositive Power
4,511,984 shares, of which 2,255,992 are directly owned by BV8 and 2,255,992 are directly owned by BV8 SF.  Tabors is a managing member or officer of the Battery VIII Companies, and may be deemed to have shared dispositive power with respect to the BV8 shares.  Tabors is a managing member or officer of the Battery VIII SF Companies, and may be deemed to have shared dispositive power with respect to the BV8 SF shares.

8

Shared Dispositive Power
See response to row 7

9

Aggregate Amount Beneficially Owned by Each Reporting Person
4,511,984 shares

10

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares*  o

11

Percent of Class Represented by Amount in Row 9
6.6%

12

Type of Reporting Person*
IN

CUSIP No. 30064K105

Schedule 13G

1

Name of Reporting Person:
I.R.S. Identification No. of Above Person (Entities Only):

Scott R. Tobin

2

Check the Appropriate Box if a Member of a Group*

(a)

o

(b)

x

3

SEC Use Only

4

Citizenship or Place of Organization
USA

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
4,511,984 shares, of which 2,255,992 are directly owned by BV8 and 2,255,992 are directly owned by BV8 SF.  Tobin is a managing member or officer of the Battery VIII Companies, and may be deemed to have shared power to vote the BV8 shares.  Tobin is a managing member or officer of the Battery VIII SF Companies, and may be deemed to have shared power to vote the BV8 SF shares.

6

Shared Voting Power
See response to row 5

7

Sole Dispositive Power
4,511,984 shares, of which 2,255,992 are directly owned by BV8 and 2,255,992 are directly owned by BV8 SF.  Tobin is a managing member or officer of the Battery VIII Companies, and may be deemed to have shared dispositive power with respect to the BV8 shares.  Tobin is a managing member or officer of the Battery VIII SF Companies, and may be deemed to have shared dispositive power with respect to the BV8 SF shares.

8

Shared Dispositive Power
See response to row 7

9

Aggregate Amount Beneficially Owned by Each Reporting Person
4,511,984 shares

10

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares*  o

11

Percent of Class Represented by Amount in Row 9
6.6%

12

Type of Reporting Person*
IN

CUSIP No. 30064K105

Schedule 13G

Item 1(a).

Name of Issuer:
ExactTarget, Inc.

Item 1(b).

Address of Issuer’s Principal Executive Offices:
20 North Meridian Street, Suite 200

Indianapolis, Indiana 46204

Item 2(a).

Name of Person Filing:
Battery Ventures VIII, L.P. (“BV8”), Battery Partners VIII, LLC (“BP8 LLC”), Battery Partners VIII Side Fund, L.P. (“BV8 SF”), Battery Partners VIII Side Fund, LLC (“BP8 SF LLC”), Battery Management Company, LLC (“BMC LLC”), Neeraj Agrawal (“Agrawal”), Michael Brown (“Brown”), Thomas J. Crotty (“Crotty”), Richard D. Frisbie (“Frisbie”), Kenneth P. Lawler (“Lawler”), Roger H. Lee (“Lee”), R. David Tabors (“Tabors”) and Scott R. Tobin (“Tobin”).  The foregoing entities and individuals are collectively referred to as the “Reporting Persons.”

Messrs. Agrawal, Brown, Crotty, Frisbie, Lawler, Lee, Tabors and Tobin are the sole managing members of BP8 LLC, the sole general partner of BV8, and/or the officers of BMC, the investment advisor to BP8 LLC.

Messrs. Agrawal, Brown, Crotty, Frisbie, Lawler, Lee, Tabors and Tobin are the sole managing members of BP8 SF LLC, the sole general partner of BV8 SF, and/or the officers of BMC, the investment advisor to BP8 SF LLC.

Item 2(b).

Address of Principal Business Office or, if none, Residence:
Battery Ventures

930 Winter Street, Suite 2500

Waltham, MA 02451

Item 2(c).

Citizenship:
Agrawal, Brown, Crotty, Frisbie, Lawler, Lee, Tabors and Tobin are United States citizens.  BV8 is a limited partnership organized under the laws of the State of Delaware.  BP8 LLC is a limited liability company organized under the laws of the State of Delaware.  BV8 SF is a limited partnership organized under the laws of the State of Delaware.  BP8 SF LLC is a limited liability company organized under the laws of the State of Delaware.  BMC LLC is a limited liability company organized under the laws of the State of Delaware.

Item 2(d).

Title of Class of Securities:
Common Stock, $0.0005 par value per share.

Item 2(e).

CUSIP Number:
30064K105

Item 3.

Not Applicable

CUSIP No. 30064K105

Schedule 13G

Item 4.

Ownership

The approximate percentages of Common Stock reported as beneficially owned by the Reporting Persons is based upon 68,081,668 shares of Common Stock outstanding as of November 5, 2012, as reported in the Issuer’s Form 10-Q for the quarterly period ended September 30, 2012, filed on November 9, 2012.

The following information with respect to the ownership of the ordinary shares of the issuer by the Reporting Persons filing this Statement is provided as of December 31, 2012:

(a)

Amount beneficially owned:   

See Row 9 of cover page for each Reporting Person.

(b)

Percent of class:   

See Row 11 of cover page for each Reporting Person.

(c)

Number of shares as to which such person has:

(i)

Sole power to vote or to direct the vote:   

See Row 5 of cover page for each Reporting Person.

(ii)

Shared power to vote or to direct the vote:    

See Row 6 of cover page for each Reporting Person.

(iii)

Sole power to dispose or to direct the disposition of:   

See Row 7 of cover page for each Reporting Person.

(iv)

Shared power to dispose or to direct the disposition of:   

See Row 8 of cover page for each Reporting Person.

Item 5.

Ownership of Five Percent or Less of a Class

Not applicable.

Item 6.

Ownership of More than Five Percent on Behalf of Another Person

Under certain circumstances set forth in the limited partnership agreement of BV8, the general and limited partners may be deemed to have the right to receive dividends from, or the proceeds from, the sale of shares of the Issuer owned by BV8.  Under certain circumstances set forth in the limited partnership agreement of BV8 SF, the general and limited partners may be deemed to have the right to receive dividends from, or the proceeds from, the sale of shares of the Issuer owned by BV8 SF.  Under certain circumstances set forth in the limited liability company agreement of BMC LLC, the members may be deemed to have the right to receive dividends from, or the proceeds from, the sale of shares of the Issuer owned by BMC LLC.

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

Not applicable.

Item 9.

Notice of Dissolution of Group

Not applicable.

CUSIP No. 30064K105

Schedule 13G

Item 10.

Certification

Not applicable.

BATTERY VENTURES VIII, L.P.

By:

Battery Partners VIII, LLC

By:

*

Managing Member

BATTERY PARTNERS VIII, LLC

By:

*

Managing Member

BATTERY VENTURES VIII SIDE FUND, L.P.

By:

Battery Partners VIII Side Fund, LLC

By:

*

Managing Member

BATTERY PARTNERS VIII SIDE FUND, LLC

By:

*

Managing Member

BATTERY MANAGEMENT COMPANY, LLC

By:

*

Managing Member

CUSIP No. 30064K105

Schedule 13G

NEERAJ AGRAWAL

By:

*

Neeraj Agrawal

MICHAEL BROWN

By:

*

Michael Brown

THOMAS J. CROTTY

By:

*

Thomas J. Crotty

RICHARD D. FRISBIE

By:

*

Richard D. Frisbie

KENNETH P. LAWLER

By:

*

Kenneth P. Lawler

ROGER H. LEE

By:

*

Roger H. Lee

R. DAVID TABORS

By:

*

R. David Tabors

CUSIP No. 30064K105

Schedule 13G

SCOTT R. TOBIN

By:

*

Scott R. Tobin

*By:

/s/ Christopher Schiavo

Name:

Christopher Schiavo

Attorney-in-Fact

CUSIP No. 30064K105

Schedule 13G

BATTERY VENTURES VIII, L.P.

By:

Battery Partners VIII, LLC

By:

*

Managing Member

BATTERY PARTNERS VIII, LLC

By:

*

Managing Member

BATTERY VENTURES VIII SIDE FUND, L.P.

By:

Battery Partners VIII Side Fund, LLC

By:

*

Managing Member

BATTERY PARTNERS VIII SIDE FUND, LLC

By:

*

Managing Member

BATTERY MANAGEMENT COMPANY, LLC

By:

*

Managing Member

CUSIP No. 30064K105

Schedule 13G

NEERAJ AGRAWAL

By:

*

Neeraj Agrawal

MICHAEL BROWN

By:

*

Michael Brown

THOMAS J. CROTTY

By:

*

Thomas J. Crotty

RICHARD D. FRISBIE

By:

*

Richard D. Frisbie

KENNETH P. LAWLER

By:

*

Kenneth P. Lawler

ROGER H. LEE

By:

*

Roger H. Lee

R. DAVID TABORS

By:

*

R. David Tabors

CUSIP No. 30064K105

Schedule 13G

SCOTT R. TOBIN

By:

*

Scott R. Tobin

*By:

/s/ Christopher Schiavo

Name:

Christopher Schiavo

Attorney-in-Fact