<PAGE> 1
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(AMENDMENT NO. 2 )*
Thermatrix Inc.
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(Name of Issuer)
Common
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(Title of Class of Securities)
883550 10 5
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(CUSIP Number)
Check the following box if a fee is being paid with this / / statement. (A fee
is not required only if the filing person: (1) has a previous statement on file
reporting beneficial ownership of more than five percent of the class of
securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7.)
*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).
(Continued on following page(s))
Page 1 of 10 Pages
SEC 1745 (10-85)
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CUSIP NO 8835550 10 5. 13G PAGE 2 OF 10 PAGES
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1 NAME OF REPORTING PERSON Charles River VI GP Limited Partnership
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
04-3049015
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2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / / (b) / /
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3 SEC USE ONLY
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4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
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5 SOLE VOTING POWER
NUMBER OF 417,939
SHARES -----------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY 0
EACH -----------------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON 417,939
WITH -----------------------------------------------------------
8 SHARED DISPOSITIVE POWER
0
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9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
417,939
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10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
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11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
5.4%
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12 TYPE OF REPORTING PERSON*
PN
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<PAGE> 3
CUSIP NO 8835550 10 5. 13G PAGE 3 OF 10 PAGES
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1 NAME OF REPORTING Richard M. Burnes, Jr.
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
###-##-####
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2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / / (b) / /
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3 SEC USE ONLY
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4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
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5 SOLE VOTING POWER
NUMBER OF 25,000
SHARES -----------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY 417,939
EACH -----------------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON 25,000
WITH -----------------------------------------------------------
8 SHARED DISPOSITIVE POWER
417,939
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9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
417,939
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10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
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11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
5.7%
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12 TYPE OF REPORTING PERSON*
IN
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<PAGE> 4
CUSIP NO 8835550 10 5. 13G PAGE 4 OF 10 PAGES
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1 NAME OF REPORTING Donald W. Feddersen.
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
###-##-####
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2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / / (b) / /
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3 SEC USE ONLY
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4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
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5 SOLE VOTING POWER
NUMBER OF 0
SHARES -----------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY 417,939
EACH -----------------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON 0
WITH -----------------------------------------------------------
8 SHARED DISPOSITIVE POWER
417,939
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9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
417,939
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10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
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11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
5.4%
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12 TYPE OF REPORTING PERSON*
IN
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<PAGE> 5
CUSIP NO 8835550 10 5. 13G PAGE 5 OF 10 PAGES
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1 NAME OF REPORTING Michael J. Zak.
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
###-##-####
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2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / / (b) / /
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3 SEC USE ONLY
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4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
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5 SOLE VOTING POWER
NUMBER OF 0
SHARES -----------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY 417,939
EACH -----------------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON 0
WITH -----------------------------------------------------------
8 SHARED DISPOSITIVE POWER
417,939
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9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
417,939
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10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
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11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
5.4%
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12 TYPE OF REPORTING PERSON*
IN
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<PAGE> 6
CUSIP NO 8835550 10 5. 13G PAGE 6 OF 10 PAGES
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1 NAME OF REPORTING John T. Neises.
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
###-##-####
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2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / / (b) / /
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3 SEC USE ONLY
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4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
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5 SOLE VOTING POWER
NUMBER OF 0
SHARES -----------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY 417,939
EACH -----------------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON 0
WITH -----------------------------------------------------------
8 SHARED DISPOSITIVE POWER
417,939
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9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
417,939
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10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
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11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
5.4%
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12 TYPE OF REPORTING PERSON*
IN
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*SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE> 7
SCHEDULE 13G Page 7 of 10 Pages
Item 1: (a) Name of Issuer:
Thermatrix Inc.
(b) Address of Issuer's Principal Executive Offices:
101 Metro Drive, Suite 248, San Jose, CA 95110
Item 2: (a) Name of Person Filing:
Charles River VI GP Limited Partnership Richard M. Burnes, Jr.,
Donald W. Feddersen, John T. Neises and Michael J. Zak. Messrs.
Burnes, Feddersen, Neises and Zak are the individual general
partners of Charles River Partnership VI GP Limited Partnership.
(b) Address of Principal Business Office or, if none, Residence:
The address of the principle business office of Charles River
Partnership VI, Charles River VI GP Limited Partnership and each
of Messrs. Burnes, Feddersen, Neises, and Zak is Charles River
Ventures, 1000 Winter Street, Suite 3300, Waltham, MA 02451
(c) Citizenship:
Charles River Partnership VI and Charles River VI GP Limited
Partnership are limited partnerships organized under the laws
of the state of Delaware. Each of Messrs. Burnes, Feddersen,
Neises and Zak is a United States Citizen.
(d) Title of Class of Securities:
Common Stock.
(e) CUSIP Number:
883550 10 5
Item 3:
Item 4: (a) Amount Beneficially Owned:
Charles River VI GP Limited Partnership, Richard M. Burnes, Jr.,
Donald W. Feddersen, Michael J. Zak and John T. Neises may be
deemed to own beneficially 417,939 shares of Common Stock as of
December 31, 1998.
(b) Percent of Class: Charles River VI GP Limited Partnership -
5.4%; Richard M. Burnes Jr. - 5.7%; Donald W. Feddersen - 5.4%;
Michael J. Zak - 5.4%; and John T. Neises - 5.4% (based on
7,695,872 shares of Common Stock outstanding as of 9/30/98).
(c) Number of shares as to which such person has:
(i) sole power to vote or direct the vote: Charles River VI GP
Limited Partnership VI-A: 417,939 shares; Mr. Burnes: 25,000
shares; Mr. Feddersen: 0 shares; Mr. Neises: 0 shares; Mr.
Zak: 0 shares.
(ii) shared power to vote or to direct the vote: Charles River
Partnership VI: 0 shares; Charles River VI GP Limited
Partnership: 417,939; Mr. Burnes: 417,939 shares;
Mr. Feddersen: 417,939 shares; Mr. Neises: 417,939 shares.
Mr. Zak: 417,939 shares
(iii) sole power to dispose or direct the disposition of: Charles
River VI GP Limited Partnership: 417,939 shares; Mr. Burnes:
25,000 shares; Mr. Feddersen: 0 shares; Mr. Neises: 0
shares; Mr. Zak: 0 shares.
(iv) shared power to dispose or to direct the disposition of:
Charles River VI GP Limited Partnership: 417,939 shares; Mr.
Burnes: 417,93 shares; Mr. Feddersen: 417,939 shares; Mr.
Neises: 417,939 shares; Mr. Zak: 417,939 shares
Each of Messrs. Burnes, Feddersen, Neises, and Zak expressly disclaims
beneficial ownership of the 355,248 shares of Common Stock held of
record by Charles River Partnership VI and the 62,691 shares of common
stock held of record by Charles River Partnership VI-A for which he does
not have a pecuniary interest..
<PAGE> 8
SCHEDULE 13G Page 8 of 10 Pages
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> 1
Page 9 of 10 Pages
EXHIBIT 1
AGREEMENT
Pursuant to Rule 13d-1 (f) (1) under the Securities and Exchange Act of 1934,
the undersigned hereby agree that only one statement containing the information
required by Schedule 13G need be filed with respects to the ownership by each
of the undersigned of shares of Thermatrix, Inc.
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
Dated: February 10, 1999
Charles River Partnership VI
By: Charles River VI GP Limited Partnership
By: signed____________________
Richard M. Burnes, Jr.
Authorized General Partner
Charles River VI GP Limited Partnership
By: signed____________________
Richard M. Burnes, Jr.
Authorized General Partner
signed__________________________
Richard M. Burnes, Jr.
signed__________________________
Donald W. Feddersen
signed__________________________
John T. Neises
signed__________________________
Michael J. Zak
<PAGE> 1
Page 10 of 10 Pages
EXHIBIT 2
REPORTING PERSON RELATIONSHIPS
On December 31, 1998, Charles River Partnership VI ("CRP VI") was the
registered holder of 355,248 shares of Thermatrix Inc. common stock. Its
"sister" venture capital partnership, Charles River Partnership VI-A ("CRP
VI-A"), was the registered holder of 62,691shares of Thermatrix Inc. common
stock. The general partner of both CRP VI and CRP VI-A is Charles River VI GP
Limited Partnership ("CRP VI GP"). The individual general partners of CRP VI GP
are Richard M. Burnes, Jr., Donald W. Feddersen, John T. Neises and Michael J.
Zak. CRP VI GP and Messrs. Burnes, Feddersen, Neises and Zak disclaims
beneficial ownership of the shares held by CRP VI and CRP VI-A for which it / he
does not have a pecuniary interest.
