<PAGE> 1
UNITED STATES OMB APPROVAL
SECURITIES AND EXCHANGE COMMISSION ------------------------
WASHINGTON, D.C. 20549 OMB Number: 3235-0145
Expires: August 31, 1999
Estimated average
SCHEDULE 13G burden hours per
response .... 14.90
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(AMENDMENT NO. 3 )*
AMX Corporation
(Name of Issuer)
Common Stock, $.01 par value
(Title of Class of Securities)
001801109
(CUSIP Number)
December 31, 1998
(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).
Page 1 of 35 Pages
<PAGE> 2
- --------------------------- -------------------------
CUSIP NO. 001801109 13G PAGE 2 OF 35
- --------------------------- -------------------------
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Summit Ventures III, L.P.
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware limited partnership
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 shares
-----------------------------------------------------
NUMBER OF 6 SHARED VOTING POWER
SHARES
BENEFICIALLY 728,476 shares
OWNED BY
EACH -----------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON
WITH 0 shares
-----------------------------------------------------
8 SHARED DISPOSITIVE POWER
728,476 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
728,476 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
/ /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.78%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
PN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 2 of 35 Pages
<PAGE> 3
- --------------------------- -------------------------
CUSIP NO. 001801109 13G PAGE 3 OF 35
- --------------------------- -------------------------
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Summit Partners III, L.P.
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware limited partnership
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 shares
-----------------------------------------------------
NUMBER OF 6 SHARED VOTING POWER
SHARES
BENEFICIALLY 728,476 shares
OWNED BY
EACH -----------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON
WITH 0 shares
-----------------------------------------------------
8 SHARED DISPOSITIVE POWER
728,476 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
728,476 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
/ /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.78%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
PN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 3 of 35 Pages
<PAGE> 4
- --------------------------- -------------------------
CUSIP NO. 001801109 13G PAGE 4 OF 35
- --------------------------- -------------------------
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Summit Investors II, L.P.
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware limited partnership
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 shares
-----------------------------------------------------
NUMBER OF 6 SHARED VOTING POWER
SHARES
BENEFICIALLY 728,476 shares
OWNED BY
EACH -----------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON
WITH 0 shares
-----------------------------------------------------
8 SHARED DISPOSITIVE POWER
728,476 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
728,476 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
/ /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.78%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
PN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 4 of 35 Pages
<PAGE> 5
- --------------------------- -------------------------
CUSIP NO. 001801109 13G PAGE 5 OF 35
- --------------------------- -------------------------
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Stamps, Woodsum & Co. III
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Massachusetts general partnership
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 shares
-----------------------------------------------------
NUMBER OF 6 SHARED VOTING POWER
SHARES
BENEFICIALLY 728,476 shares
OWNED BY
EACH -----------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON
WITH 0 shares
-----------------------------------------------------
8 SHARED DISPOSITIVE POWER
728,476 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
728,476 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
/ /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.78%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
PN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 5 of 35 Pages
<PAGE> 6
- --------------------------- -------------------------
CUSIP NO. 001801109 13G PAGE 6 OF 35
- --------------------------- -------------------------
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Summit Subordinated Debt Fund, L.P.
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware limited partnership
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 shares
-----------------------------------------------------
NUMBER OF 6 SHARED VOTING POWER
SHARES
BENEFICIALLY 728,476 shares
OWNED BY
EACH -----------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON
WITH 0 shares
-----------------------------------------------------
8 SHARED DISPOSITIVE POWER
728,476 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
728,476 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
/ /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.78%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
PN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 6 of 35 Pages
<PAGE> 7
- --------------------------- -------------------------
CUSIP NO. 001801109 13G PAGE 7 OF 35
- --------------------------- -------------------------
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Summit Partners SD, L.P.
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware limited partnership
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 shares
-----------------------------------------------------
NUMBER OF 6 SHARED VOTING POWER
SHARES
BENEFICIALLY 728,476 shares
OWNED BY
EACH -----------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON
WITH 0 shares
-----------------------------------------------------
8 SHARED DISPOSITIVE POWER
728,476 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
728,476 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
/ /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.78%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
PN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 7 of 35 Pages
<PAGE> 8
- --------------------------- -------------------------
CUSIP NO. 001801109 13G PAGE 8 OF 35
- --------------------------- -------------------------
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
E. Roe Stamps, IV
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 shares
-----------------------------------------------------
NUMBER OF 6 SHARED VOTING POWER
SHARES
BENEFICIALLY 728,476 shares
OWNED BY
EACH -----------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON
WITH 0 shares
-----------------------------------------------------
8 SHARED DISPOSITIVE POWER
728,476 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
728,476 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
/ /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.78%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 8 of 35 Pages
<PAGE> 9
- --------------------------- -------------------------
CUSIP NO. 001801109 13G PAGE 9 OF 35
- --------------------------- -------------------------
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Stephen G. Woodsum
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 shares
-----------------------------------------------------
NUMBER OF 6 SHARED VOTING POWER
SHARES
BENEFICIALLY 728,476 shares
OWNED BY
EACH -----------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON
WITH 0 shares
-----------------------------------------------------
8 SHARED DISPOSITIVE POWER
728,476 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
728,476 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
/ /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.78%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 9 of 35 Pages
<PAGE> 10
- --------------------------- -------------------------
CUSIP NO. 001801109 13G PAGE 10 OF 35
- --------------------------- -------------------------
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Gregory M. Avis
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 shares
-----------------------------------------------------
NUMBER OF 6 SHARED VOTING POWER
SHARES
BENEFICIALLY 728,476 shares
OWNED BY
EACH -----------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON
WITH 0 shares
-----------------------------------------------------
8 SHARED DISPOSITIVE POWER
728,476 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
728,476 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
/ /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.78%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 10 of 35 Pages
<PAGE> 11
- --------------------------- -------------------------
CUSIP NO. 001801109 13G PAGE 11 OF 35
- --------------------------- -------------------------
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
John A. Genest
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 shares
-----------------------------------------------------
NUMBER OF 6 SHARED VOTING POWER
SHARES
BENEFICIALLY 728,476 shares
OWNED BY
EACH -----------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON
WITH 0 shares
-----------------------------------------------------
8 SHARED DISPOSITIVE POWER
728,476 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
728,476 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
/ /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.78%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 11 of 35 Pages
<PAGE> 12
- --------------------------- -------------------------
CUSIP NO. 001801109 13G PAGE 12 OF 35
- --------------------------- -------------------------
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Martin J. Mannion
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 shares
-----------------------------------------------------
NUMBER OF 6 SHARED VOTING POWER
SHARES
BENEFICIALLY 728,476 shares
OWNED BY
EACH -----------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON
WITH 0 shares
-----------------------------------------------------
8 SHARED DISPOSITIVE POWER
728,476 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
728,476 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
/ /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.78%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 12 of 35 Pages
<PAGE> 13
- --------------------------- -------------------------
CUSIP NO. 001801109 13G PAGE 13 OF 35
- --------------------------- -------------------------
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Bruce R. Evans
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 shares
-----------------------------------------------------
NUMBER OF 6 SHARED VOTING POWER
SHARES
BENEFICIALLY 728,476 shares
OWNED BY
EACH -----------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON
WITH 0 shares
-----------------------------------------------------
8 SHARED DISPOSITIVE POWER
728,476 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
728,476 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
/ /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.78%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 13 of 35 Pages
<PAGE> 14
- --------------------------- -------------------------
CUSIP NO. 001801109 13G PAGE 14 OF 35
- --------------------------- -------------------------
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Thomas S. Roberts
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 shares
-----------------------------------------------------
NUMBER OF 6 SHARED VOTING POWER
SHARES
BENEFICIALLY 728,476 shares
OWNED BY
EACH -----------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON
WITH 0 shares
-----------------------------------------------------
8 SHARED DISPOSITIVE POWER
728,476 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
728,476 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
/ /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.78%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 14 of 35 Pages
<PAGE> 15
- --------------------------- -------------------------
CUSIP NO. 001801109 13G PAGE 15 OF 35
- --------------------------- -------------------------
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Walter G. Kortschak
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 shares
-----------------------------------------------------
NUMBER OF 6 SHARED VOTING POWER
SHARES
BENEFICIALLY 728,476 shares
OWNED BY
EACH -----------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON
WITH 0 shares
-----------------------------------------------------
8 SHARED DISPOSITIVE POWER
728,476 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
728,476 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
/ /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.78%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 15 of 35 Pages
<PAGE> 16
- --------------------------- -------------------------
CUSIP NO. 001801109 13G PAGE 16 OF 35
- --------------------------- -------------------------
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Joseph F. Trustey
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 shares
-----------------------------------------------------
NUMBER OF 6 SHARED VOTING POWER
SHARES
BENEFICIALLY 101,989 shares
OWNED BY
EACH -----------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON
WITH 0 shares
-----------------------------------------------------
8 SHARED DISPOSITIVE POWER
101,989 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
101,989 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
/ /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
1.23%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 16 of 35 Pages
<PAGE> 17
Schedule 13G
Item 1(a). Name of Issuer: AMX Corporation.
Item 1(b). Address of Issuer's Principal Executive Offices:
11995 Forestgate Drive, Dallas, TX 75243
Item 2(a). Names of Persons Filing: Summit Ventures III, L.P., Summit
Partners III, L.P., Summit Investors II, L.P., Stamps, Woodsum
& Co. III, Summit Subordinated Debt Fund, L.P., Summit Partners
SD, L.P. and Messrs. E. Roe Stamps, IV, Stephen G. Woodsum,
Gregory M. Avis, John A. Genest, Martin J. Mannion, Bruce R.
Evans, Thomas S. Roberts, Walter G. Kortschak, and Joseph
F. Trustey.
Summit Partners III, L.P. is the sole general partner of Summit
Ventures III, L.P. Stamps, Woodsum & Co. III is the sole
general partner of Summit Partners III, L.P. Summit Partners
SD, L.P. is the sole general partner of Summit Subordinated
Debt Fund, L.P. Stamps, Woodsum & Co. III is the sole general
partner of Summit Partners SD, L.P. Messrs. Stamps, Woodsum,
Avis, Genest, Mannion, Evans, Roberts and Kortschak are
individual general partners of Stamps, Woodsum & Co. III,
Summit Investors II, L.P. and Summit Partners SD, L.P. Mr.
Trustey is an individual general partner of Summit Partners SD,
L.P.
As of December 31, 1998, Ernest K. Jacquet was no longer
affiliated with any of the "Entities" (as defined below).
Item 2(b). Address of Principal Business Office or, if None, Residence:
The address of the principal business office of Summit Ventures
III, L.P., Summit Partners III, L.P., Summit Investors II,
L.P., Stamps, Woodsum & Co. III, Summit Subordinated Debt Fund,
L.P., Summit Partners SD, L.P. and Messrs. Stamps, Woodsum,
Mannion, Genest, Evans, Roberts and Trustey is Summit Partners,
600 Atlantic Avenue, Boston, Massachusetts 02210. The address
of the principal business office of Messrs. Avis and Kortschak
is Summit Partners, 499 Hamilton Avenue, Palo Alto, California
94301.
Item 2(c). Citizenship: Each of Summit Ventures III, L.P., Summit
Partners III, L.P., Summit Investors II, L.P., Summit
Subordinated Debt Fund, L.P. and Summit Partners SD, L.P. is a
limited partnership organized under the laws of the State of
Delaware. Stamps, Woodsum & Co. III is a general partnership
organized under the laws of the Commonwealth of Massachusetts.
Each of Messrs. Stamps, Woodsum, Avis, Mannion, Genest, Evans,
Roberts, Kortschak and Trustey is a United States citizen.
Page 17 of 35 Pages
<PAGE> 18
Item 2(d). Title of Class of Securities: Common Stock, $.01 par value.
Item 2(e). CUSIP Number:001801109
Item 3. If this statement is filed pursuant to Rules 13d-1(b), or
13d-2(b), check whether the person filing is a:
Not Applicable.
Item 4. Ownership.
(a) Amount Beneficially Owned:
Each of Summit Ventures III, L.P., Summit Partners III,
L.P., Stamps, Woodsum & Co. III, Summit Investors II,
L.P., Summit Subordinated Debt Fund, L.P. and Summit
Partners SD, L.P. (individually an "Entity" and
collectively the "Entities") may be deemed to own
beneficially 728,476 shares of Common Stock as of December
31, 1998. Each of Messrs. Stamps, Woodsum, Avis, Mannion,
Genest, Evans, Roberts and Kortschak may be deemed to own
beneficially 728,476 shares of Common Stock as of December
31, 1998. Mr. Trustey may be deemed to beneficially own
101,989 shares of Common Stock as of December 31, 1998.
As of December 31, 1998, Summit Ventures III, L.P. was the
record holder of 611,917 shares of Common Stock. As of
December 31, 1998, Summit Investors II, L.P. was the
record holder of 14,570 shares of Common Stock. As of
December 31, 1998, Summit Subordinated Debt Fund, L.P. was
the record holder of 101,989 shares of Common Stock. The
shares held of record by Summit Ventures III, L.P. Summit
Investors II, L.P. and Summit Subordinated Debt Fund, L.P.
are referred to herein collectively as the "Record
Shares." By virtue of the affiliate relationships among
the Entities, each Entity may be deemed to own
beneficially all of the Record Shares. Hence, each Entity
may be deemed to own beneficially 728,476 shares of Common
Stock. In their capacities as individual general partners
of Stamps, Woodsum & Co. III and Summit Investors II,
L.P., each of Messrs. Stamps, Woodsum, Avis, Mannion,
Genest, Evans, Roberts, and Kortschak may be deemed to own
beneficially 728,476 shares of Common Stock. Mr. Trustey
may be deemed to own beneficially 101,989 shares of Common
Stock.
Each of the reporting persons expressly disclaims
beneficial ownership of any shares of Common Stock of AMX
Corporation, except in the case of Summit Ventures III,
L.P., for the 611,917
Page 18 of 35 Pages
<PAGE> 19
shares which it holds or record, in the case of Summit
Subordinated Debt Fund, L.P., for the 101,989 shares which
it holds of record, and in the case of Summit Investors
II, L.P., for the 14,570 shares which it holds of record.
(b) Percent of Class:
Summit Ventures III, L.P.: 8.78%
Summit Partners III, L.P.: 8.78%
Stamps, Woodsum & Co. III: 8.78%
Summit Subordinated Debt Fund, L.P.: 8.78%
Summit Partners SD, L.P.: 8.78%
Summit Investors II, L.P.: 8.78%
E. Roe Stamps, IV: 8.78%
Stephen G. Woodsum: 8.78%
Martin J. Mannion: 8.78%
John A. Genest: 8.78%
Gregory M. Avis: 8.78%
Bruce R. Evans: 8.78%
Walter G. Kortschak: 8.78%
Thomas S. Roberts: 8.78%
Joseph F. Trustey: 1.23%
The foregoing percentages are calculated based on the 8,293,348 shares of
Common Stock reported to be outstanding on AMX Corporation's Form 10-Q for
the quarterly period ended September 30, 1998.
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote:
0 shares for each reporting person
(ii) shared power to vote or to direct the vote:
Summit Ventures III, L.P.: 728,476 shares
Summit Partners III, L.P.: 728,476 shares
Stamps, Woodsum & Co. III: 728,476 shares
Summit Investors II, L.P.: 728,476 shares
Summit Subordinated Debt Fund, L.P.:
728,476 shares
Summit Partners SD, L.P.: 728,476 shares
E. Roe Stamps, IV: 728,476 shares
Stephen G. Woodsum: 728,476 shares
Martin J. Mannion: 728,476 shares
John A. Genest: 728,476 shares
Page 19 of 35 Pages
<PAGE> 20
Gregory M. Avis: 728,476 shares
Bruce R. Evans: 728,476 shares
Walter G. Kortschak: 728,476 shares
Thomas S. Roberts: 728,476 shares
Joseph F. Trustey: 101,989 shares
(iii) sole power to dispose or direct the disposition of:
0 shares for each reporting person
(iv) shared power to dispose or direct the disposition
of:
Summit Ventures III, L.P.: 728,476 shares
Summit Partners III, L.P.: 728,476 shares
Stamps, Woodsum & Co. III: 728,476 shares
Summit Investors II, L.P.: 728,476 shares
Summit Subordinated Debt Fund, L.P.:
728,476 shares
Summit Partners SD, L.P.: 728,476 shares
E. Roe Stamps, IV: 728,476 shares
Stephen G. Woodsum: 728,476 shares
Martin J. Mannion: 728,476 shares
John A. Genest: 728,476 shares
Gregory M. Avis: 728,476 shares
Bruce R. Evans: 728,476 shares
Walter G. Kortschak: 728,476 shares
Thomas S. Roberts: 728,476 shares
Joseph F. Trustey: 101,989 shares
Item 5. Ownership of Five Percent or Less of a Class.
[ X ] Mr. Trustey may be deemed to own beneficially 101,989
shares of Common Stock as of December 31, 1998, which is five
percent or less of the Common Stock of AMX Corporation.
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.
Page 20 of 35 Pages
<PAGE> 21
Not Applicable. The reporting persons expressly disclaim
membership in a "group" as defined in Rule 13d-1(b)(ii)(H).
Item 9. Notice of Dissolution of Group.
Not Applicable.
Item 10. Certification.
Not Applicable. This statement on Schedule 13G is not filed
pursuant to Rule 13d-1(b).
Page 21 of 35 Pages
<PAGE> 22
SIGNATURES
After reasonable inquiry and to the best of our knowledge and belief, we
certify that the information set forth in this statement is true, complete and
correct. We also hereby agree to file this statement jointly pursuant to the
Agreement listed on Exhibit 1 hereto.
Dated: February 10, 1999
SUMMIT VENTURES III, L.P. SUMMIT SUBORDINATED DEBT
FUND, L.P.
By: Summit Partners III, L.P. By: Summit Partners SD, L.P.
By: Stamps, Woodsum & Co. III By: Stamps, Woodsum & Co. III
By: *
-------------------------------
By: * E. Roe Stamps, IV
------------------------ General Partner
E. Roe Stamps, IV
General Partner
SUMMIT PARTNERS SD, L.P.
SUMMIT INVESTORS II, L.P.
By: Stamps, Woodsum & Co. III
By: /s/ John A. Genest By: *
----------------------------- --------------------------
General Partner E. Roe Stamps, IV
General Partner
SUMMIT PARTNERS III, L.P. STAMPS, WOODSUM & CO. III
By: Stamps, Woodsum & Co. III
By: * By: *
------------------------ -------------------------------
E. Roe Stamps, IV E. Roe Stamps, IV
General Partner General Partner
Page 22 of 35 Pages
<PAGE> 23
*
-------------------------------
Walter G. Kortschak
*
-------------------------------
E. Roe Stamps, IV
*
-------------------------------
Stephen G. Woodsum
*
-------------------------------
Gregory M. Avis
*
-------------------------------
Martin J. Mannion
/s/ John A. Genest
-------------------------------
John A. Genest
*
-------------------------------
Bruce R. Evans
*
-------------------------------
Thomas S. Roberts
*
-------------------------------
Joseph F. Trustey
*By: /s/ John A. Genest
---------------------------
John A. Genest,
Attorney-in-Fact
* Pursuant to Powers of Attorney on file with the Commission, which Powers of
Attorney are incorporated herein by reference. Copies of such Powers of Attorney
are attached hereto as Exhibit 2.
Page 23 of 35 Pages
<PAGE> 1
Exhibit 1
AGREEMENT
Pursuant to Rule 13d-1(f)(1) under the Securities Exchange Act of 1934,
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 shares of Common Stock of AMX Corporation.
This agreement may be executed in any number of counterparts, each of
which shall be deemed an original.
EXECUTED this 10th day of February, 1999.
SUMMIT VENTURES III, L.P. SUMMIT PARTNERS SD, L.P.
By: Summit Partners III, L.P. By: Stamps, Woodsum & Co. III
By: Stamps, Woodsum & Co. III By: *
---------------------------
E. Roe Stamps, IV
General Partner
By: *
------------------------
E. Roe Stamps, IV
General Partner
SUMMIT PARTNERS III, L.P.
SUMMIT INVESTORS II, L.P.
By: Stamps, Woodsum & Co. III
By: /s/ John A. Genest By: *
----------------------------- --------------------------
General Partner E. Roe Stamps, IV
General Partner
SUMMIT SUBORDINATED DEBT STAMPS, WOODSUM & CO. III
FUND, L.P.
By: Summit Partners SD, L.P By: *
-------------------------------
E. Roe Stamps, IV
By: Stamps, Woodsum & Co. III General Partner
By: *
------------------------
E. Roe Stamps, IV
General Partner
Page 24 of 35 Pages
<PAGE> 2
*
-------------------------------
E. Roe Stamps, IV
*
-------------------------------
Stephen G. Woodsum
*
-------------------------------
Gregory M. Axis
*
-------------------------------
Martin J. Mannion
/s/ John A. Genest
-------------------------------
John A. Genest
*
-------------------------------
Bruce R. Evans
*
-------------------------------
Walter G. Kortschak
*
-------------------------------
Thomas S. Roberts
*
-------------------------------
Joseph F. Trustey
*By: /s/ John A. Genest
---------------------------
John A. Genest,
Attorney-in-Fact
* Pursuant to Powers of Attorney on file with the Commission, which
Powers of Attorney are incorporated herein by reference. Copies of such
Powers of Attorney are attached hereto as Exhibit 2.
Page 25 of 35 Pages
<PAGE> 1
Exhibit 2
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that each person whose signature
appears below hereby constitutes and appoints each and any of E. Roe Stamps, IV,
Stephen G. Woodsum and John A. Genest his true and lawful attorney-in-fact and
agent, with full power of substitution and resubstitution, for him and in his
name, place and stead, in any and all capacities (until revoked in writing) to
sign any and all instruments, certificates and documents required to be executed
on behalf of himself individually or on behalf of each or any of Summit
Ventures, L.P., Summit Partners, L.P., Stamps, Woodsum & Co., Summit Partners'
Holdings, L.P., Summit Ventures II, L.P., Summit Partners II, L.P., Stamps,
Woodsum & Co. II, SV Eurofund C.V., SV International, L.P., Stamps, Woodsum
International & Co., Summit Investors, L.P., Summit Investors II, L.P., Summit
Investors III, L.P., Summit Ventures III, L.P., Summit Partners III, L.P.,
Stamps, Woodsum & Co. III, Summit Ventures IV, L.P., Summit Partners IV, L.P.,
Stamps, Woodsum & Co., IV, Summit Subordinated Debt Fund, L.P., Summit Partners
SD, L.P., SW Management Corp., Summit Management Co., Summit Subordinated Debt
Fund II, L.P., and Summit Partners SD II, LLC, pursuant to sections 13 and 16 of
the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and any
and all regulations promulgated thereunder, and to file the same, with all
exhibits thereto, and any other documents in connection therewith, with the
Securities and Exchange Commission, and with any other entity when and if such
is mandated by the Exchange Act or by the By-laws of the National Association of
Securities Dealers, granting unto said attorney-in-fact and agent full power and
authority to do and perform each and every act and thing requisite and necessary
fully to all intents and purposes as she might or could do in person thereby
ratifying and confirming all that said attorney-in-fact and agent, or her
substitute or substitutes, may lawfully do or cause to be done by virtue hereof.
Page 26 of 35 Pages
<PAGE> 2
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the
10th day of February, 1997.
/s/ E. Roe Stamps, IV
------------------------------------
E. Roe Stamps, IV
Commonwealth of Massachusetts )
) ss:
County of Suffolk )
On this 10th day of February, 1997, before me personally came E. Roe
Stamps, IV, known to me to be the person described and who executed the
foregoing instrument that he acknowledged that he executed the same.
[Notary Seal]
/s/ Cynthia R. Freidman
------------------------------------
Notary Public
My Commission expires: October 20, 2000
Page 27 of 35 Pages
<PAGE> 3
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the
10th day of February, 1997.
/s/ Stephen G. Woodsum
------------------------------------
Stephen G. Woodsum
Commonwealth of Massachusetts )
) ss:
County of Suffolk )
On this 10th day of February, 1997, before me personally came Stephen
G. Woodsum, known to me to be the person described and who executed the
foregoing instrument that he acknowledged that he executed the same.
[Notary Seal]
/s/ Cynthia R. Freidman
------------------------------------
Notary Public
My Commission expires: October 20, 2000
Page 28 of 35 Pages
<PAGE> 4
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the
10th day of February, 1997.
/s/ Martin J. Mannion
------------------------------------
Martin J. Mannion
Commonwealth of Massachusetts )
) ss:
County of Suffolk )
On this 10th day of February, 1997, before me personally came Martin
J. Mannion, known to me to be the person described and who executed the
foregoing instrument that he acknowledged that he executed the same.
[Notary Seal]
/s/ Cynthia R. Freidman
------------------------------------
Notary Public
My Commission expires: October 20, 2000
Page 29 of 35 Pages
<PAGE> 5
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the
10th day of February, 1997.
/s/ John A. Genest
------------------------------------
John A. Genest
Commonwealth of Massachusetts )
) ss:
County of Suffolk )
On this 10th day of February, 1997, before me personally came John A.
Genest, known to me to be the person described and who executed the foregoing
instrument that he acknowledged that he executed the same.
[Notary Seal]
/s/ Cynthia R. Freidman
------------------------------------
Notary Public
My Commission expires: October 20, 2000
Page 30 of 35 Pages
<PAGE> 6
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the
10th day of February, 1997.
/s/ Gregory M. Avis
------------------------------------
Gregory M. Avis
State of California )
) ss:
County of Santa Clara )
On this 3rd day of February, 1997, before me personally came Stephen
G. Woodsum, known to me to be the person described and who executed the
foregoing instrument that he acknowledged that he executed the same.
[Notary Seal]
/s/ Katherine C. Ely
------------------------------------
Notary Public
My Commission expires: May 28, 2000
Page 31 of 35 Pages
<PAGE> 7
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the
10th day of February, 1997.
/s/ Thomas S. Roberts
------------------------------------
Thomas S. Roberts
Commonwealth of Massachusetts )
) ss:
County of Suffolk )
On this 10th day of February, 1997, before me personally came Thomas
S. Roberts, known to me to be the person described and who executed the
foregoing instrument that he acknowledged that he executed the same.
[Notary Seal]
/s/ Cynthia R. Freidman
------------------------------------
Notary Public
My Commission expires: October 20, 2000
Page 32 of 35 Pages
<PAGE> 8
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the
10th day of February, 1997.
/s/ Bruce R. Evans
------------------------------------
Bruce R. Evans
Commonwealth of Massachusetts )
) ss:
County of Suffolk )
On this 10th day of February, 1997, before me personally came Bruce R.
Evans, known to me to be the person described and who executed the foregoing
instrument that he acknowledged that he executed the same.
[Notary Seal]
/s/ Cynthia R. Freidman
------------------------------------
Notary Public
My Commission expires: October 20, 2000
Page 33 of 35 Pages
<PAGE> 9
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the
10th day of February, 1997.
/s/ Walter G. Kortschak
------------------------------------
Walter G. Kortschak
State of California )
) ss:
County of Santa Clara )
On this 3rd day of February, 1997, before me personally came Walter
G. Kortschak, known to me to be the person described and who executed the
foregoing instrument that he acknowledged that he executed the same.
[Notary Seal]
/s/ Katherine C. Ely
------------------------------------
Notary Public
My Commission expires: May 28, 2000
Page 34 of 35 Pages
<PAGE> 10
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the
10th day of February, 1997.
/s/ Joseph F. Trustey
------------------------------------
Joseph F. Trustey
Commonwealth of Massachusetts )
) ss:
County of Suffolk )
On this 10th day of February, 1997, before me personally came Joseph
F. Trustey, known to me to be the person described and who executed the
foregoing instrument that he acknowledged that he executed the same.
[Notary Seal]
/s/ Cynthia R. Freidman
------------------------------------
Notary Public
My Commission expires: October 20, 2000
Page 35 of 35 Pages
