CUSIP
NO. 591708102
|
13D
|
Page 2
of 15
Pages
|
|
||||||||
1
|
NAME
OF REPORTING PERSON
M/C
Venture Investors,
LLC
|
|
||||||
2
|
CHECK
THE APPROPRIATE BOX IF A MEMBER OF THE GROUP (SEE
INSTRUCTIONS)
|
(a)
o (b)
o |
|
|||||
3
|
SEC
USE ONLY
|
|
||||||
4
|
CITIZENSHIP
OR PLACE OF ORGANIZATION
Massachusetts
|
|
||||||
|
5
|
SOLE
VOTING POWER
0
|
|
|||||
NUMBER
OF
SHARES
BENEFICIALLY
OWNED
BY
EACH
|
6
|
SHARED
VOTING POWER
1,938,206
|
|
|||||
REPORTING
PERSON
WITH
|
7
|
SOLE
DISPOSITIVE POWER
0
|
|
|||||
|
8
|
SHARED
DISPOSITIVE POWER
1,938,206
|
|
|||||
9
|
AGGREGATE
AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,938,206
|
|
||||||
10
|
CHECK
IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE
INSTRUCTIONS)
|
x
|
|
|||||
11
|
PERCENT
OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
0.6%
|
|
||||||
12
|
TYPE
OF REPORTING PERSON(SEE INSTRUCTIONS)
OO
|
|
||||||
|
CUSIP
NO. 591708102
|
13D
|
Page 3
of 15
Pages
|
|
||||||||
1
|
NAMES
OF REPORTING PERSONS.
M/C
Venture Partners IV,
L.P.
|
|
||||||
2
|
CHECK
THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
|
(a)
o (b)
o |
|
|||||
3
|
SEC
USE ONLY
|
|
||||||
4
|
CITIZENSHIP
OR PLACE OF ORGANIZATION
Delaware
|
|
||||||
|
5
|
SOLE
VOTING POWER
0
|
|
|||||
NUMBER
OF
SHARES
BENEFICIALLY
OWNED
BY
EACH
|
6
|
SHARED
VOTING POWER
6,443,882
|
|
|||||
REPORTING
PERSON
WITH
|
7
|
SOLE
DISPOSITIVE POWER
0
|
|
|||||
|
8
|
SHARED
DISPOSITIVE POWER
6,443,882
|
|
|||||
9
|
AGGREGATE
AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
6,443,882
|
|
||||||
10
|
CHECK
IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES(SEE
INSTRUCTIONS)
|
x
|
|
|||||
11
|
PERCENT
OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
1.9%
|
|
||||||
12
|
TYPE
OF REPORTING PERSON(SEE INSTRUCTIONS)
PN
|
|
||||||
|
CUSIP
NO. 591708102
|
13D
|
Page 4
of 15
Pages
|
|
||||||||
1
|
NAMES
OF REPORTING PERSONS.
M/C
VP IV,
LLC
|
|
||||||
2
|
CHECK
THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
|
(a)
o (b)
o |
|
|||||
3
|
SEC
USE ONLY
|
|
||||||
4
|
CITIZENSHIP
OR PLACE OF ORGANIZATION
Massachusetts
|
|
||||||
|
5
|
SOLE
VOTING POWER
0
|
|
|||||
NUMBER
OF
SHARES
BENEFICIALLY
OWNED
BY
EACH
|
6
|
SHARED
VOTING POWER
6,443,882
|
|
|||||
REPORTING
PERSON
WITH
|
7
|
SOLE
DISPOSITIVE POWER
0
|
|
|||||
|
8
|
SHARED
DISPOSITIVE POWER
6,443,882
|
|
|||||
9
|
AGGREGATE
AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
6,443,882
|
|
||||||
10
|
CHECK
IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES(SEE
INSTRUCTIONS)
|
x
|
|
|||||
11
|
PERCENT
OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
1.9%
|
|
||||||
12
|
TYPE
OF REPORTING PERSON(SEE INSTRUCTIONS)
OO
|
|
||||||
|
CUSIP
NO. 591708102
|
13D
|
Page 5
of 15
Pages
|
|
||||||||
1
|
NAMES
OF REPORTING PERSONS.
M/C
Venture Partners V,
L.P.
|
|
||||||
2
|
CHECK
THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
|
(a)
o (b)
o |
|
|||||
3
|
SEC
USE ONLY
|
|
||||||
4
|
CITIZENSHIP
OR PLACE OF ORGANIZATION
Delaware
|
|
||||||
|
5
|
SOLE
VOTING POWER
0
|
|
|||||
NUMBER
OF
SHARES
BENEFICIALLY
OWNED
BY
EACH
|
6
|
SHARED
VOTING POWER
15,609,200
|
|
|||||
REPORTING
PERSON
WITH
|
7
|
SOLE
DISPOSITIVE POWER
0
|
|
|||||
|
8
|
SHARED
DISPOSITIVE POWER
15,609,200
|
|
|||||
9
|
AGGREGATE
AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
15,609,200
|
|
||||||
10
|
CHECK
IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES(SEE
INSTRUCTIONS)
|
x
|
|
|||||
11
|
PERCENT
OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
4.5%
|
|
||||||
12
|
TYPE
OF REPORTING PERSON(SEE INSTRUCTIONS)
PN
|
|
||||||
|
CUSIP
NO. 591708102
|
13D
|
Page 6
of 15
Pages
|
|
||||||||
1
|
NAMES
OF REPORTING PERSONS.
M/C
VP V,
LLC
|
|
||||||
2
|
CHECK
THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
|
(a)
o (b)
o |
|
|||||
3
|
SEC
USE ONLY
|
|
||||||
4
|
CITIZENSHIP
OR PLACE OF ORGANIZATION
Massachusetts
|
|
||||||
|
5
|
SOLE
VOTING POWER
0
|
|
|||||
NUMBER
OF
SHARES
BENEFICIALLY
OWNED
BY
EACH
|
6
|
SHARED
VOTING POWER
15,609,200
|
|
|||||
REPORTING
PERSON
WITH
|
7
|
SOLE
DISPOSITIVE POWER
0
|
|
|||||
|
8
|
SHARED
DISPOSITIVE POWER
15,609,200
|
|
|||||
9
|
AGGREGATE
AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
15,609,200
|
|
||||||
10
|
CHECK
IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES(SEE
INSTRUCTIONS)
|
x
|
|
|||||
11
|
PERCENT
OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
4.5%
|
|
||||||
12
|
TYPE
OF REPORTING PERSON(SEE INSTRUCTIONS)
OO
|
|
||||||
|
CUSIP
NO. 591708102
|
13D
|
Page 7
of 15
Pages
|
|
||||||||
1
|
NAMES
OF REPORTING PERSONS.
Chestnut
Venture 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
|
CITIZENSHIP
OR PLACE OF ORGANIZATION
Delaware
|
|
||||||
|
5
|
SOLE
VOTING POWER
0
|
|
|||||
NUMBER
OF
SHARES
BENEFICIALLY
OWNED
BY
EACH
|
6
|
SHARED
VOTING POWER
1,029,431
|
|
|||||
REPORTING
PERSON
WITH
|
7
|
SOLE
DISPOSITIVE POWER
0
|
|
|||||
|
8
|
SHARED
DISPOSITIVE POWER
1,029,431
|
|
|||||
9
|
AGGREGATE
AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,029,431
|
|
||||||
10
|
CHECK
IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES(SEE
INSTRUCTIONS)
|
x
|
|
|||||
11
|
PERCENT
OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
0.3%
|
|
||||||
12
|
TYPE
OF REPORTING PERSON(SEE INSTRUCTIONS)
PN
|
|
||||||
|
CUSIP
NO. 591708102
|
13D
|
Page 8
of 15
Pages
|
|
||||||||
1
|
NAMES
OF REPORTING PERSONS.
Chestnut
Street Partners,
Inc.
|
|
||||||
2
|
CHECK
THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
|
(a)
o (b)
o |
|
|||||
3
|
SEC
USE ONLY
|
|
||||||
4
|
CITIZENSHIP
OR PLACE OF ORGANIZATION
Massachusetts
|
|
||||||
|
5
|
SOLE
VOTING POWER
0
|
|
|||||
NUMBER
OF
SHARES
BENEFICIALLY
OWNED
BY
EACH
|
6
|
SHARED
VOTING POWER
1,029,431
|
|
|||||
REPORTING
PERSON
WITH
|
7
|
SOLE
DISPOSITIVE POWER
0
|
|
|||||
|
8
|
SHARED
DISPOSITIVE POWER
1,029,431
|
|
|||||
9
|
AGGREGATE
AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,029,431
|
|
||||||
10
|
CHECK
IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES(SEE
INSTRUCTIONS)
|
x
|
|
|||||
11
|
PERCENT
OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
0.3%
|
|
||||||
12
|
TYPE
OF REPORTING PERSON(SEE INSTRUCTIONS)
CO
|
|
||||||
|
CUSIP
NO. 591708102
|
13D
|
Page 9
of 15
Pages
|
CUSIP
NO. 591708102
|
13D
|
Page 10
of 15
Pages
|
M/C
Venture Investors, LLC
|
|
M/C
Venture Partners IV, L.P.
|
|
M/C
VP IV, LLC
|
|
M/C
Venture Partners V, L.P.
|
|
M/C
VP V, LLC
|
|
Chestnut
Venture Partners, L.P.
|
|
Chestnut
Street Partners, Inc.
|
M/C
Venture Investors, LLC
|
Massachusetts
|
|
M/C
Venture Partners IV, L.P.
|
Delaware
|
|
M/C
VP IV, LLC
|
Massachusetts
|
|
M/C
Venture Partners V, L.P.
|
Delaware
|
|
M/C
VP V, LLC
|
Massachusetts
|
|
Chestnut
Venture Partners, L.P.
|
Delaware
|
|
Chestnut
Street Partners, Inc.
|
Massachusetts
|
(a) |
[_]
|
Broker
or dealer registered under Section 15 of the Act.
|
(b) | [_] | Bank as defined in Section 3(a)(6) of the Act. |
(c) | [_] | Insurance company as defined in Section 13(a)(19) of the Act. |
(d) | [_] | Investment company registered under Section 8 of the Investment Company Act of 1940. |
(e) | [_] | An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E); |
(f) | [_] | An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F); |
(g) | [_] | A parent holding company or control person in accordance with § 240.13d- 1(b)(1)(ii)(G); |
(h) | [_] | A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act; |
(i) | [_] | A church plan that is excluded from the definition of an investment company underSection 3(c)(14) of the Investment Company Act of 1940; |
(j) | [_] | Group, in accordance with § 240.13d-1(b)(1)(ii)(J). |
CUSIP
NO. 591708102
|
13D
|
Page 11
of 15
Pages
|
M/C
Venture Investors, LLC
|
1,938,206
|
M/C
Venture Partners IV, L.P.
|
6,443,882
|
M/C
VP IV, LLC
|
6,443,882
|
M/C
Venture Partners V, L.P.
|
15,609,200
|
M/C
VP V, LLC
|
15,609,200
|
Chestnut
Venture Partners, L.P.
|
1,029,431
|
Chestnut
Street Partners, Inc.
|
1,029,431
|
M/C
Venture Investors, LLC
|
0.6%
|
M/C
Venture Partners IV, L.P.
|
1.9%
|
M/C
VP IV, LLC
|
1.9%
|
M/C
Venture Partners V, L.P.
|
4.5%
|
M/C
VP V, LLC
|
4.5%
|
Chestnut
Venture Partners, L.P.
|
0.3%
|
Chestnut
Street Partners, Inc.
|
0.3%
|
M/C
Venture Investors, LLC
|
0
|
M/C
Venture Partners IV, L.P.
|
0
|
M/C
Venture Partners V, L.P.
|
0
|
M/C
VP IV, LLC
|
0
|
M/C
VP V, LLC
|
0
|
Chestnut
Venture Partners, L.P.
|
0
|
Chestnut
Street Partners, Inc.
|
0
|
M/C
Venture Investors, LLC
|
1,938,206
|
M/C
Venture Partners IV, L.P.
|
6,443,882
|
M/C
VP IV, LLC
|
6,443,882
|
M/C
Venture Partners V, L.P.
|
15,609,200
|
M/C
VP V, LLC
|
15,609,200
|
Chestnut
Venture Partners, L.P.
|
1,029,431
|
Chestnut
Street Partners, Inc.
|
1,029,431
|
CUSIP
NO. 591708102
|
13D
|
Page 12
of 15
Pages
|
M/C
Venture Investors, LLC
|
0
|
M/C
Venture Partners IV, L.P.
|
0
|
M/C
VP IV, LLC
|
0
|
M/C
Venture Partners V, L.P.
|
0
|
M/C
VP V, LLC
|
0
|
Chestnut
Venture Partners, L.P.
|
0
|
Chestnut
Street Partners, Inc.
|
0
|
M/C
Venture Investors, LLC
|
1,938,206
|
M/C
Venture Partners IV, L.P.
|
6,443,882
|
M/C
VP IV, LLC
|
6,443,882
|
M/C
Venture Partners V, L.P.
|
15,609,200
|
M/C
VP V, LLC
|
15,609,200
|
Chestnut
Venture Partners, L.P.
|
1,029,431
|
Chestnut
Street Partners, Inc.
|
1,029,431
|
CUSIP
NO. 591708102
|
13D
|
Page 13
of 15
Pages
|
M/C
VENTURE INVESTORS, LLC
|
By:
/s/ James F.
Wade
|
Title:
Manager
|
M/C
VENTURE PARTNERS IV, L.P.
|
By:
M/C VP IV, LLC, its General Partner
|
By:
/s/ James F.
Wade
|
Name:
James F. Wade
|
Title:
Manager
|
M/C
VP IV, LLC
|
By:
/s/ James F.
Wade
|
Name:
James F. Wade
|
Title:
Manager
|
M/C
VENTURE PARTNERS V, L.P.
|
By:
M/C VP V, LLC, its General Partner
|
By:
/s/ James F.
Wade
|
Name:
James F. Wade
|
Title:
Manager
|
M/C
VP V, LLC
|
By:
/s/ James F.
Wade
|
Name:
James F. Wade
|
Title:
Manager
|
CHESTNUT
VENTURE PARTNERS, L.P.
|
By:
CHESTNUT STREET PARTNERS, INC., its General Partner
|
By:
/s/ James F.
Wade
|
Name:
James F. Wade
|
Title:
Vice President
|
CHESTNUT
STREET PARTNERS, INC.
|
By:
/s/ James F.
Wade
|
Name:
James F. Wade
|
Title:
Vice President
|
CUSIP
NO. 591708102
|
13D
|
Page 14
of 15
Pages
|
CUSIP
NO. 591708102
|
13D
|
Page 15
of 15
Pages
|
M/C
VENTURE INVESTORS, LLC
|
By:
/s/ James F.
Wade
|
Name:
James F. Wade
|
Title:
Manager
|
M/C
VENTURE PARTNERS IV, L.P.
|
By:
M/C VP IV, LLC, its General Partner
|
By:
/s/ James F.
Wade
|
Name:
James F. Wade
|
Title:
Manager
|
M/C
VP IV, LLC
|
By:
/s/ James F.
Wade
|
Name:
James F. Wade
|
Title:
Manager
|
M/C
VENTURE PARTNERS V, L.P.
|
By:
M/C VP V, LLC, its General Partner
|
By:
/s/ James F.
Wade
|
Title:
Manager
|
M/C
VP V, LLC
|
By:
/s/ James F.
Wade
|
Name:
James F. Wade
|
Title:
Manager
|
CHESTNUT
VENTURE PARTNERS, L.P.
|
By:
CHESTNUT STREET PARTNERS, INC., its General Partner
|
By:
/s/ James F.
Wade
|
Name:
James F. Wade
|
Title:
Vice President
|
CHESTNUT
STREET PARTNERS, INC.
|
By:
/s/ James F.
Wade
|
Name:
James F. Wade
|
Title:
Vice President
|