<PAGE> 1
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. )*
Sycamore Networks, Inc..
(Name of Issuer)
Common Stock, $.001 par value per share
(Title of Class of Securities)
871206 10 8
(CUSIP Number)
December 31, 1999
(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).
POTENTIAL PERSONS WHO ARE TO RESPOND TO THE COLLECTION OF INFORMATION CONTAINED
IN THIS FORM ARE NOT REQUIRED TO RESPOND UNLESS THE FORM DISPLAYS A CURRENTLY
VALID OMB CONTROL NUMBER.
<PAGE> 2
CUSIP No. 871206 10 8
...............................................................................
1. Names of Reporting Persons.
I.R.S. Identification Nos. of above persons (entities only).
Matrix Partners V, L.P. (04-3399413)
...............................................................................
- -------------------------------------------------------------------------------
2. Check the Appropriate Box if a Member of a Group (See Instructions)
(a) ........................................................................
(b) ........................................................................
- -------------------------------------------------------------------------------
3. SEC Use Only ...............................................................
- -------------------------------------------------------------------------------
4. Citizenship or Place of Organization ...............................Delaware
- -------------------------------------------------------------------------------
Number of 5. Sole Voting Power ............................-11,328,180-
Shares
Beneficially
Owned by Each
Reporting
Person With:
------------------------------------------------------------
6. Shared Voting Power ................................. -0-
------------------------------------------------------------
7. Sole Dispositive Power .................... -11,328,180-
------------------------------------------------------------
8. Shared Dispositive Power ............................ -0-
- -------------------------------------------------------------------------------
9. Aggregate Amount Beneficially Owned by Each Reporting Person.. -11,328,180-
- -------------------------------------------------------------------------------
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
Instructions) ..............................................................
- -------------------------------------------------------------------------------
11. Percent of Class Represented by Amount in Row (9) ................... 14.39%
- -------------------------------------------------------------------------------
12. Type of Reporting Person (See Instructions) ............................ PN
- -------------------------------------------------------------------------------
...............................................................................
...............................................................................
...............................................................................
...............................................................................
...............................................................................
...............................................................................
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Page 2 of 9 pages
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CUSIP No. 871206 10 8
...............................................................................
1. Names of Reporting Persons.
I.R.S. Identification Nos. of above persons (entities only).
Matrix V Entrepreneurs Fund, L.P. (04-3442501)
...............................................................................
- -------------------------------------------------------------------------------
2. Check the Appropriate Box if a Member of a Group (See Instructions)
(a) ........................................................................
(b) ........................................................................
- -------------------------------------------------------------------------------
3. SEC Use Only ...............................................................
- -------------------------------------------------------------------------------
4. Citizenship or Place of Organization .............................. Delaware
- -------------------------------------------------------------------------------
Number of 5. Sole Voting Power ............................ -1,258,689-
Shares
Beneficially
Owned by Each
Reporting
Person With:
------------------------------------------------------------
6. Shared Voting Power ................................... 0
------------------------------------------------------------
7. Sole Dispositive Power ....................... -1,258,689-
------------------------------------------------------------
8. Shared Dispositive Power ..............................-0-
- -------------------------------------------------------------------------------
9. Aggregate Amount Beneficially Owned by Each Reporting Person ....-1,258,689-
- -------------------------------------------------------------------------------
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
Instructions) .............................................................
- -------------------------------------------------------------------------------
11. Percent of Class Represented by Amount in Row (9) .................. 1.60%
- -------------------------------------------------------------------------------
12. Type of Reporting Person (See Instructions) ............................ PN
- -------------------------------------------------------------------------------
...............................................................................
...............................................................................
...............................................................................
...............................................................................
...............................................................................
...............................................................................
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Page 3 of 9 pages
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CUSIP No. 871206 10 8
...............................................................................
1. Names of Reporting Persons.
I.R.S. Identification Nos. of above persons (entities only).
Matrix V Management Co., L.L.C. (04-3399412)
...............................................................................
- -------------------------------------------------------------------------------
2. Check the Appropriate Box if a Member of a Group (See Instructions)
(a) ........................................................................
(b) ........................................................................
- -------------------------------------------------------------------------------
3. SEC Use Only ...............................................................
- -------------------------------------------------------------------------------
4. Citizenship or Place of Organization ............................. Delaware
- -------------------------------------------------------------------------------
Number of 5. Sole Voting Power ......................... -12,586,869-
Shares
Beneficially
Owned by Each
Reporting
Person With:
------------------------------------------------------------
6. Shared Voting Power .................................. -0-
------------------------------------------------------------
7. Sole Dispositive Power ................... -12,586,869-
------------------------------------------------------------
8. Shared Dispositive Power ..............................-0-
- -------------------------------------------------------------------------------
9. Aggregate Amount Beneficially Owned by Each Reporting Person... -12,586,869-
- -------------------------------------------------------------------------------
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
Instructions) .............................................................
- -------------------------------------------------------------------------------
11. Percent of Class Represented by Amount in Row (9) ................... 15.99%
- -------------------------------------------------------------------------------
12. Type of Reporting Person (See Instructions) ............................ PN
- -------------------------------------------------------------------------------
...............................................................................
...............................................................................
...............................................................................
...............................................................................
...............................................................................
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Page 4 of 9 pages
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CUSIP No. 871206 10 8
...............................................................................
1. Names of Reporting Persons.
I.R.S. Identification Nos. of above persons (entities only).
Timothy A. Barrows (###-##-####)
...............................................................................
- -------------------------------------------------------------------------------
2. Check the Appropriate Box if a Member of a Group (See Instructions)
(a) ........................................................................
(b) ........................................................................
- -------------------------------------------------------------------------------
3. SEC Use Only ...............................................................
- -------------------------------------------------------------------------------
4. Citizenship or Place of Organization ........................ United States
- -------------------------------------------------------------------------------
Number of 5. Sole Voting Power ............................... -30,000-
Shares
Beneficially
Owned by Each
Reporting
Person With:
------------------------------------------------------------
6. Shared Voting Power ......................... -12,586,869-
------------------------------------------------------------
7. Sole Dispositive Power .......................... -30,000-
------------------------------------------------------------
8. Shared Dispositive Power .................... -12,586,869-
- -------------------------------------------------------------------------------
9. Aggregate Amount Beneficially Owned by Each Reporting Person... -12,616,869-
- -------------------------------------------------------------------------------
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
Instructions) ...............................................................
- -------------------------------------------------------------------------------
11. Percent of Class Represented by Amount in Row (9).................... 16.03%
- -------------------------------------------------------------------------------
12. Type of Reporting Person (See Instructions) ............................ IN
- -------------------------------------------------------------------------------
...............................................................................
...............................................................................
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...............................................................................
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Page 5 of 9 pages
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CUSIP No. 871206 10 8
...............................................................................
1. Names of Reporting Persons.
I.R.S. Identification Nos. of above persons (entities only).
Paul J. Ferri (###-##-####)
...............................................................................
- -------------------------------------------------------------------------------
2. Check the Appropriate Box if a Member of a Group (See Instructions)
(a) ........................................................................
(b) ........................................................................
- -------------------------------------------------------------------------------
3. SEC Use Only ...............................................................
- -------------------------------------------------------------------------------
4. Citizenship or Place of Organization ........................ United States
- -------------------------------------------------------------------------------
Number of 5. Sole Voting Power ............................. -30,000-
Shares
Beneficially
Owned by Each
Reporting
Person With:
------------------------------------------------------------
6. Shared Voting Power ......................... -12,586,869-
------------------------------------------------------------
7. Sole Dispositive Power .......................... -30,000-
------------------------------------------------------------
8. Shared Dispositive Power .................... -12,586,869-
- -------------------------------------------------------------------------------
9.. Aggregate Amount Beneficially Owned by Each Reporting Person... -12,616,869-
- -------------------------------------------------------------------------------
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
Instructions) .............................................................
- -------------------------------------------------------------------------------
11. Percent of Class Represented by Amount in Row (9) ................... 16.03%
- -------------------------------------------------------------------------------
12. Type of Reporting Person (See Instructions) ............................ IN
- -------------------------------------------------------------------------------
...............................................................................
...............................................................................
...............................................................................
...............................................................................
...............................................................................
...............................................................................
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Page 6 of 9 pages
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CUSIP No. 871206 10 8
Item 1(a) Name of Issuer:
Sycamore Networks, Inc.
Item 1(b) Address of Issuer's Principal Executive Offices:
10 Elizabeth Drive
Chelmsford MA 01824
Item 2(a) Name of Persons Filing:
Matrix Partners V, L.P. ("Matrix V"); Matrix V
Entrepreneurs Fund, L.P. ("Entrepreneurs", and together
with Matrix V, the "Partnerships"); Matrix V Management
Co., L.L.C. ("Management"), the general partner of each
of the Partnerships; and Timothy A. Barrows and Paul J.
Ferri, each a Managing Member of Management, who have
shared voting and dispositive authority with respect to
shares of Sycamore Networks, Inc. held of record by the
Partnerships.
Item 2(b) Address of Principal Business Office or, if none,
Residence:
The address of the reporting persons is:
1000 Winter Street, Suite 4500
Waltham, Massachusetts 02451
Item 2(c) Citizenship:
Matrix V is a limited partnership organized under the
laws of the State of Delaware. Entrepreneurs is a
limited partnership organized under the laws of the
State of Delaware. Management is a limited liability
company organized under the laws of the State of
Delaware. Mr. Barrows and Mr. Ferri are citizens of the
United States.
Item 2(d) Title of Class of Securities:
Common Stock, par value $.001 per share (the "Common Stock").
Item 2(e) CUSIP Number:
871206 10 8
Item 3 Description of Person Filing:
Not applicable.
Item 4 Ownership(1):
(a) Amount Beneficially Owned:
Matrix is the record holder of 11,328,180 shares of
Common Stock and may be deemed to beneficially own the
11,328,180 shares of Common Stock held of
- ------------------------------
1 As of December 31, 1999.
Page 7 of 9 pages
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CUSIP No. 871206 10 8
record by it. Entrepreneurs may be deemed to
beneficially own the 1,258,689 shares of Common Stock
held of record by it. Barrows and Mr. Ferri, as
Managing Members of Management, may be deemed to
beneficially own the 12,616,869 shares of Common Stock
held of record by the Partnership. The filing of this
statement shall not be construed as an admission that
any of the reporting persons are, for the purpose of
Section 13(d) or 13(g) of the Act, the beneficial owners
of any securities covered under this statement.
(b) Percent of Class:
Matrix IV: 14.39%
Entrepreneurs:: 1.60%
Management: 15.99%
Barrows 16.03%
Ferri 16.03%
(c) Number of Shares as to which the person has:
(i) sole voting power; (ii) shared voting power; (iii)
sole dispositive power; (iv) shared dispositive power:
Matrix V may be deemed to have sole power to vote and
dispose of 11,328,180 shares of Common Stock held of
record by it. Entrepreneurs may be deemed to have sole
power to vote and dispose of 1,258,689 shares of Common
Stock held of record by it. Management, as general
partner of the Partnerships, may be deemed to have sole
power to vote and dispose of the 12,586,869 shares of
Common Stock held of record by the Partnerships. Barrows
and Ferri, as managing members of Management who share
voting and dispositive authority with respect to shares
of Sycamore Networks, Inc. held of record by the
Partnerships, may be deemed to have shared power to vote
the 12,586,869 shares of Common Stock held of record by
the Partnerships. Barrows and Ferri each have sole power
to vote 30,000 shares held in the name of each.
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:
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:
Not applicable.
Item 9 Notice of Dissolution of Group:
Not applicable.
Item 10 Certification:
Not applicable.
Page 8 of 9 pages
<PAGE> 9
CUSIP No. 871206 10 8
SIGNATURE
After reasonable inquiry and to the best of the knowledge and belief of
each of the undersigned, each of the undersigned hereby certifies that the
information set forth in this statement is true, complete and correct.
DATED: February 10, 2000
MATRIX PARTNERS V, L.P.
By: Matrix V Management Co., L.L.C
General Partner
By: /s/ Timothy A. Barrows
------------------------------------
Timothy A. Barrows
Managing Member
MATRIX V ENTREPRENEURS FUND, L.P.
By: Matrix V Management Co., L.L.C.
General Partner
By: /s/ Timothy A. Barrows
------------------------------------
Timothy A. Barrows
Managing Member
MATRIX V MANAGEMENT CO., L.L.C
By: Timothy A. Barrows
Managing Member
By: /s/ Timothy A. Barrows
--------------------------------
Managing Member
/s/ Timothy A. Barrows
----------------------------------------
Timothy A. Barrows
/s/ Paul J. Ferri
----------------------------------------
Paul J. Ferri
Page 9 of 9 pages
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CUSIP No. 871206 10 8
Exhibit I
AGREEMENT
Pursuant to Rule 13d-1(f)(1) under the Securities Exchange Act of 1934, as
amended, the undersigned hereby agree that only one statement containing the
information required by Schedule 13G need be filed with respect to the ownership
by each of the undersigned of the shares of Common Stock of Sycamore Networks,
Inc.
EXECUTED as a sealed instrument this 10 day of February, 2000.
MATRIX PARTNERS V, L.P.
By: Matrix V Management Co., L.L.C.
General Partner
By: /s/ Timothy A. Barrows
------------------------------------
Timothy A. Barrows
Managing Member
MATRIX V ENTREPRENEURS FUND, L.P.
By: Matrix V Management Co., L.L.C.
General Partner
By: /s/ Timothy A. Barrows
------------------------------------
Timothy A. Barrows
Managing Member
MATRIX V MANAGEMENT CO., L.L.C
By: Timothy A. Barrows
Managing Member
By: /s/ Timothy A. Barrows
--------------------------------
Managing Member
/s/ Timothy A. Barrows
----------------------------------------
Timothy A. Barrows
/s/ Paul J. Ferri
----------------------------------------
Paul J. Ferri
