<PAGE>
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. __)*
ILOG, S.A.
(Name of Issuer)
Ordinary Shares, Nominal Value FF 4 per share
(Title of Class of Securities)
452360100
(CUSIP Number)
*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>
Cusip No. 421963109 13G Page 2 of 19 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Oak Investment Partners VI, Limited Partnership
06-1412578
- -------------------------------------------------------------------
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
- -------------------------------------------------------------------
<TABLE>
<CAPTION>
<S> <C> <C>
Number of (5) Sole Voting Power 1,354,847 shares of
Shares common stock
Bene-
ficially (6) Shared Voting Power Not applicable
Owned by
Each (7) Sole Dispositive Power 1,354,847 shares of
Reporting common stock
Person
With (8) Shared Dispositive Power Not applicable
</TABLE>
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
1,354,847 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
10.5%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
<PAGE>
Cusip No. 421963109 13G Page 3 of 19 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Oak Associates VI, LLC
06-1462392
- -------------------------------------------------------------------
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
- -------------------------------------------------------------------
<TABLE>
<CAPTION>
<S> <C> <C>
Number of (5) Sole Voting Power Not applicable
Shares
Bene- (6) Shared Voting Power 1,354,847 shares of
ficially common stock
Owned by
Each (7) Sole Dispositive Power Not applicable
Reporting
Person (8) Shared Dispositive Power 1,354,847 shares of
With common stock
</TABLE>
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
1,354,847 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
10.5%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
<PAGE>
Cusip No. 421963109 13G Page 4 of 19 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Oak VI Affiliates Fund, Limited Partnership
06-1414970
- -------------------------------------------------------------------
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
- -------------------------------------------------------------------
<TABLE>
<CAPTION>
<S> <C> <C>
Number of (5) Sole Voting Power 24,261 shares of
Shares common stock
Bene-
ficially (6) Shared Voting Power Not applicable
Owned by
Each (7) Sole Dispositive Power 24,261 shares of
Reporting common stock
Person
With (8) Shared Dispositive Power Not applicable
</TABLE>
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
24,261 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
0.2%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
<PAGE>
Cusip No. 421963109 13G Page 5 of 19 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Oak VI Affiliates, LLC
06-1414968
- -------------------------------------------------------------------
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
- -------------------------------------------------------------------
<TABLE>
<CAPTION>
<S> <C> <C>
Number of (5) Sole Voting Power Not applicable
Shares
Bene- (6) Shared Voting Power 24,261 shares of
ficially common stock
Owned by
Each (7) Sole Dispositive Power Not applicable
Reporting
Person (8) Shared Dispositive Power 24,261 shares of
With common stock
</TABLE>
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
24,261 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
0.2%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
<PAGE>
Cusip No. 421963109 13G Page 6 of 19 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Oak Management Corporation
06-0990851
- -------------------------------------------------------------------
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
- -------------------------------------------------------------------
<TABLE>
<CAPTION>
<S> <C> <C>
Number of (5) Sole Voting Power Not applicable
Shares
Bene- (6) Shared Voting Power 1,379,108 shares of
ficially common stock
Owned by
Each (7) Sole Dispositive Power Not applicable
Reporting
Person (8) Shared Dispositive Power 1,379,108 shares of
With common stock
</TABLE>
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
1,379,108 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
10.7%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
<PAGE>
Cusip No. 421963109 13G Page 7 of 19 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Bandel L. Carano
- -------------------------------------------------------------------
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
- -------------------------------------------------------------------
<TABLE>
<CAPTION>
<S> <C> <C>
Number of (5) Sole Voting Power Not applicable
Shares
Bene- (6) Shared Voting Power 1,379,108 shares of
ficially common stock
Owned by
Each (7) Sole Dispositive Power Not applicable
Reporting
Person
With (8) Shared Dispositive Power 1,379,108 shares of
common stock
</TABLE>
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
1,379,108 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
10.7%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
IN
<PAGE>
Cusip No. 421963109 13G Page 8 of 19 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Gerald R. Gallagher
- -------------------------------------------------------------------
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
- -------------------------------------------------------------------
<TABLE>
<CAPTION>
<S> <C> <C>
Number of (5) Sole Voting Power Not applicable
Shares
Bene- (6) Shared Voting Power 1,379,108 shares of
ficially common stock
Owned by
Each (7) Sole Dispositive Power Not applicable
Reporting
Person
With (8) Shared Dispositive Power 1,379,108 shares of
common stock
</TABLE>
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
1,379,108 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
10.7%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
IN
<PAGE>
Cusip No. 421963109 13G Page 9 of 19 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Edward F. Glassmeyer
- -------------------------------------------------------------------
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
- -------------------------------------------------------------------
<TABLE>
<CAPTION>
<S> <C> <C>
Number of (5) Sole Voting Power Not applicable
Shares
Bene- (6) Shared Voting Power 1,379,108 shares of
ficially common stock
Owned by
Each (7) Sole Dispositive Power Not applicable
Reporting
Person
With (8) Shared Dispositive Power 1,379,108 shares of
common stock
</TABLE>
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
1,379,108 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
10.7%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
IN
<PAGE>
Cusip No. 421963109 13G Page 10 of 19 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Fredric W. Harman
- -------------------------------------------------------------------
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
- -------------------------------------------------------------------
<TABLE>
<CAPTION>
<S> <C> <C>
Number of (5) Sole Voting Power Not applicable
Shares
Bene- (6) Shared Voting Power 1,379,108 shares of
ficially common stock
Owned by
Each (7) Sole Dispositive Power Not applicable
Reporting
Person
With (8) Shared Dispositive Power 1,379,108 shares of
common stock
</TABLE>
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
1,379,108 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
10.7%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
IN
<PAGE>
Cusip No. 421963109 13G Page 11 of 19 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Ann H. Lamont
- -------------------------------------------------------------------
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
- -------------------------------------------------------------------
<TABLE>
<CAPTION>
<S> <C> <C>
Number of (5) Sole Voting Power Not applicable
Shares
Bene- (6) Shared Voting Power 1,379,108 shares of
ficially common stock
Owned by
Each (7) Sole Dispositive Power Not applicable
Reporting
Person
With (8) Shared Dispositive Power 1,379,108 shares of
common stock
</TABLE>
- ------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
1,379,108 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
10.7%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
IN
<PAGE>
Cusip No. 421963109 13G Page 12 of 19 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Eileen M. More
- -------------------------------------------------------------------
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
- -------------------------------------------------------------------
<TABLE>
<CAPTION>
<S> <C> <C>
Number of (5) Sole Voting Power Not applicable
Shares
Bene- (6) Shared Voting Power 1,379,108 shares of
ficially common stock
Owned by
Each (7) Sole Dispositive Power Not applicable
Reporting
Person
With (8) Shared Dispositive Power 1,379,108 shares of
common stock
</TABLE>
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
1,379,108 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
10.7%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
IN
<PAGE>
Page 13 of 19 Pages
Schedule 13G
Ordinary Shares, Nominal Value FF 4 per share
CUSIP No. 452360100
Item 1(a) Name of Issuer:
ILOG, S.A.
Item 1(b) Address of Issuer's Principal Executive Offices:
9 Rue De Verdun
94253 Gentilly, France
and
1901 Landings Drive
Mountain View, California 94043
Item 2(a) Name of Person filing:
Oak Investment Partners VI, Limited Partnership
Oak Associates VI, LLC
Oak VI Affiliates Fund, Limited Partnership
Oak VI Affiliates, LLC
Oak Management Corporation
Bandel L. Carano
Gerald R. Gallagher
Edward F. Glassmeyer
Fredric W. Harman
Ann H. Lamont
Eileen M. More
Item 2(b) Address of Principal Business Office or, if none, Residence:
c/o Oak Management Corporation
One Gorham Island
Westport, CT 06880
Item 2(c) Citizenship:
Please refer to Item 4 on each cover sheet for each filing person
Item 2(d) Title of Class of Securities:
Ordinary Shares, Nominal Value FF 4 per share
Item 2(e) CUSIP Number: 452360100
Item 3 Not Applicable.
Item 4 Ownership.
<PAGE>
The approximate percentages of shares of Common Stock reported as
beneficially owned by the Reporting Entities is based upon 12,928,781 shares
outstanding as of December 31, 1997, as reported in a recent press release of
the Issuer.
Please see Items 5, 6, 7, 8, 9 and 11 for each cover sheet for each filing
entity.
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>
Signature
After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.
Dated February 13, 1998
Oak Investment Partners VI,
Limited Partnership
By: Oak Associates VI, LLC,
As General Partner
By: /s/ Edward F. Glassmeyer
------------------------
Managing Member
Oak Associates VI, LLC
By: /s/ Edward F. Glassmeyer
------------------------
Managing Member
Oak VI Affiliates Fund, Limited Partnership
By: Oak VI Affiliates, LLC
As General Partner
By: /s/ Edward F. Glassmeyer
------------------------
Managing Member
Oak VI Affiliates, LLC
By: /s/ Edward F. Glassmeyer
------------------------
Managing Member
<PAGE>
OAK MANAGEMENT CORPORATION
By: /s/ Edward F. Glassmeyer
---------------------------
Name: Edward F. Glassmeyer
Title: President
/s/ Bandel L. Carano
---------------------------
Bandel L. Carano
/s/ Fredric W. Harman
---------------------------
Fredric W. Harman
/s/ Gerald R.Gallagher
---------------------------
Gerald R. Gallagher
/s/ Edward F. Glassmeyer
---------------------------
Edward F. Glassmeyer
/s/ Ann H. Lamont
---------------------------
Ann H. Lamont
/s/ Eileen M. More
---------------------------
Eileen M. More
<PAGE>
INDEX TO EXHIBITS
<TABLE>
<CAPTION>
Page
<S> <C> <C>
EXHIBIT A Agreement of Reporting Persons 18
</TABLE>
<PAGE>
Exhibit A
Each of the undersigned hereby agrees that the Schedule 13G filed on the
date hereof with respect to the shares of Common Stock of ILOG, S.A. has been
filed on behalf of the undersigned.
Signature:
Dated February 13, 1998
Oak Investment Partners VI,
Limited Partnership
By: Oak Associates VI, LLC,
As General Partner
By: /s/ Edward F. Glassmeyer
--------------------------
Managing Member
Oak Associates VI, LLC
By: /s/ Edward F. Glassmeyer
--------------------------
Managing Member
Oak VI Affiliates Fund, Limited Partnership
By: Oak VI Affiliates, LLC
As General Partner
By: /s/ Edward F. Glassmeyer
-------------------------
Managing Member
Oak VI Affiliates, LLC
By: /s/ Edward F. Glassmeyer
-------------------------
Managing Member
<PAGE>
OAK MANAGEMENT CORPORATION
By: /s/ Edward F.Glassmeyer
---------------------------
Name: Edward F. Glassmeyer
Title: President
/s/ Bandel L. Carano
---------------------------
Bandel L. Carano
/s/ Fredric W. Harman
---------------------------
Fredric W. Harman
/s/ Gerald R. Gallagher
---------------------------
Gerald R. Gallagher
/s/ Edward F. Glassmeyer
---------------------------
Edward F. Glassmeyer
/s/ Ann H. Lamont
---------------------------
Ann H. Lamont
/s/ Eileen M. More
---------------------------
Eileen M. More
