CHATTERJEE PURNENDU
SC 13D/A, 1998-06-30
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934
                                (Amendment No.1)*

                             R&B FALCON CORPORATION
                         ------------------------------
                                (Name of Issuer)

                          Common Stock, $0.01 par Value
                         ------------------------------
                         (Title of Class of Securities)

                                    74912E101
                            -----------------------
                                 (CUSIP Number)

                              Stephen M. Vine, Esq.
                    Akin, Gump, Strauss, Hauer & Feld, L.L.P.
                               590 Madison Avenue
                            New York, New York 10022
                                 (212) 872-1000
                  -------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                  June 23, 1998
                            ------------------------
                      (Date of Event which Requires Filing
                               of this Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  which is the subject of this  Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box [_].

Note: Six copies of this statement, including all exhibits, should be filed with
the  Commission.  See Rule 13d- 1(a) for other  parties to whom copies are to be
sent.

*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 disclosure
provided in a prior cover page.

The information required on 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 12 Pages
                             Exhibit Index: Page 11



<PAGE>


                                                              Page 2 of 12 Pages


                                  SCHEDULE 13D

CUSIP No. 74912E101

1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  S-C Rig Investments, L.P.

2        Check the Appropriate Box If a Member of a Group*
                                                       a. [_]
                                                       b. [x]
3        SEC Use Only

4        Source of Funds*

                  Not applicable

5        Check Box If Disclosure of Legal  Proceedings  Is Required  Pursuant to
         Items 2(d) or 2(e) [_]

6        Citizenship or Place of Organization

                  Delaware

                           7        Sole Voting Power
 Number of                                  15,708,608
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  0
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   15,708,608
    With
                           10       Shared Dispositive Power
                                            0

11       Aggregate Amount Beneficially Owned by Each Reporting Person

                                            15,708,608

12       Check Box If the Aggregate  Amount in Row (11) Excludes Certain Shares*
         [x]

13       Percent of Class Represented By Amount in Row (11)

                                    9.51%

14       Type of Reporting Person*

                  PN

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!





<PAGE>


                                                              Page 3 of 12 Pages


                                  SCHEDULE 13D

CUSIP No. 74912E101

1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  S-C Rig Co.

2        Check the Appropriate Box If a Member of a Group*
                                                       a.  [_]
                                                       b.  [x]
3        SEC Use Only

4        Source of Funds*

                  Not applicable

5        Check Box If Disclosure of Legal  Proceedings  Is Required  Pursuant to
         Items 2(d) or 2(e) [_]

6        Citizenship or Place of Organization

                  Delaware

                           7        Sole Voting Power
 Number of                                  15,785,306
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  0
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   15,785,306
    With
                           10       Shared Dispositive Power
                                            0

11       Aggregate Amount Beneficially Owned by Each Reporting Person

                                            15,785,306

12       Check Box If the Aggregate  Amount in Row (11) Excludes Certain Shares*
         [x]

13       Percent of Class Represented By Amount in Row (11)

                                    9.56%

14       Type of Reporting Person*

                  CO

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



<PAGE>


                                                              Page 4 of 12 Pages


                                  SCHEDULE 13D

CUSIP No. 74912E101

1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  Chatterjee Fund Management, L.P.

2        Check the Appropriate Box If a Member of a Group*
                                                       a. [_]
                                                       b. [x]

3        SEC Use Only

4        Source of Funds*

                  Not applicable

5        Check Box If Disclosure of Legal  Proceedings  Is Required  Pursuant to
         Items 2(d) or 2(e) [_]

6        Citizenship or Place of Organization

                  Delaware

                           7        Sole Voting Power
 Number of                                  742,783
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  0
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   742,783
    With
                           10       Shared Dispositive Power
                                            0

11       Aggregate Amount Beneficially Owned by Each Reporting Person

                                            742,783

12       Check Box If the Aggregate  Amount in Row (11) Excludes Certain Shares*
         [x]

13       Percent of Class Represented By Amount in Row (11)

                                    .45%

14       Type of Reporting Person*

                  IA; PN
            
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


                                                              Page 5 of 12 Pages


                                  SCHEDULE 13D

CUSIP No. 74912E101

1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  Purnendu Chatterjee

2        Check the Appropriate Box If a Member of a Group*
                                                       a. [_]
                                                       b. [x]
3        SEC Use Only

4        Source of Funds*

                  Not applicable

5        Check Box If Disclosure of Legal  Proceedings  Is Required  Pursuant to
         Items 2(d) or 2(e) [_]

6        Citizenship or Place of Organization

                  United States

                           7        Sole Voting Power
 Number of                                  17,700,373
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  0
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   17,700,373
    With
                           10       Shared Dispositive Power
                                            0

11       Aggregate Amount Beneficially Owned by Each Reporting Person

                                            17,700,373

12       Check Box If the Aggregate  Amount in Row (11) Excludes Certain Shares*
         [_]

13       Percent of Class Represented By Amount in Row (11)

                                    10.72%

14       Type of Reporting Person*

                  IA; IN

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!





<PAGE>


                                                              Page 6 of 12 Pages


          This  Amendment  No. 1 to  Schedule  13D  relates  to shares of common
stock, $0.01 par value per share (the "Shares"),  of R&B Falcon Corporation (the
"Issuer").  This Amendment No. 1 supplementally  amends the initial statement on
Schedule  13D dated  January 12, 1998 (the  "Initial  Statement"),  filed by the
Reporting  Persons (as defined  herein).  This Amendment No. 1 is being filed by
the Reporting  Persons to report that as a result of the recent  disposition  of
Shares of the  Issuer,  the number of Shares of which  certain of the  Reporting
Persons  may be deemed  the  beneficial  owners has  decreased  by more than one
percent of the total outstanding Shares.  Capitalized terms used but not defined
herein shall have the meanings  ascribed to them in the Initial  Statement.  The
Initial Statement is supplementally amended as follows.


Item 2.   Identity and Background.

          This  Statement  is being  filed on  behalf  of each of the  following
persons (collectively, the "Reporting Persons"):

(i)       S-C Rig Investments, L.P. ("S-C Rig");

(ii)      S-C Rig Co.;

(iii)     Chatterjee Fund Management, L.P. ("CFM") and

(iv)      Dr. Purnendu Chatterjee ("Dr. Chatterjee").

          This Statement relates to the Shares held for the accounts of S-C Rig,
S-C Rig Co., CFM,  Furzedown (as defined herein),  Dr. Chatterjee and Chatterjee
Charitable (as defined herein).

          CFM is a Delaware  limited  partnership.  Dr.  Chatterjee  is the sole
general  partner  of  CFM.  The  principal  business  of  CFM  is to  invest  in
securities.  The principal office of CFM is located at 888 Seventh Avenue,  30th
Floor, New York, New York 10106.

Item 5.   Interest in Securities of the Issuer.

          (a)  (i) S-C Rig may be  deemed  the  beneficial  owner of  15,708,608
Shares  (approximately  9.51% of the  total  number  of  Shares  which  would be
outstanding  assuming  the exercise by S-C Rig of all of the warrants it holds).
This  number  consists  of: (A)  15,705,592  Shares held for its account and (B)
3,016 Shares  issuable  upon  exercise of warrants  held for its  account.  Each
warrant held for the account of S-C Rig is exercisable for 1 Share at a price of
$0.01 per Share.



<PAGE>


                                                              Page 7 of 12 Pages


               (ii) S-C Rig Co. may be deemed the beneficial owner of 15,785,306
Shares  (approximately  9.56% of the total number of Shares outstanding assuming
the exercise by S-C Rig of all of the warrants it holds).  This number  consists
of: (A) 76,698  Shares held for its account and (B) the  15,708,608  Shares held
for the account of S-C Rig (includes Shares issuable upon exercise of warrants).

               (iii)  CFM may be  deemed  the  beneficial  owner of the  742,783
Shares held for its account  (approximately  .45% of the total  number of Shares
outstanding).

               (iv)  Dr.  Chatterjee  may be  deemed  the  beneficial  owner  of
17,700,373  Shares   (approximately   10.72%  of  the  total  number  of  Shares
outstanding  assuming  the exercise by S-C Rig of all of the warrants it holds).
This  number  consists  of (A)  745,484  Shares  held for his  account,  (B) the
15,708,608 Shares held for the account of S-C Rig (includes Shares issuable upon
exercise of  warrants),  (C) 76,698  Shares held for the account of S-C Rig Co.,
(D)  176,800  Shares  held  for  the  account  of  Furzedown   Trading   Limited
("Furzedown"),  which may be deemed to have  granted Dr.  Chatterjee  voting and
dispositive  power over the  Shares  reported  herein as held by it (E)  742,783
Shares held for the  account of CFM and (F) 250,000  Shares held for the account
of Chatterjee  Charitable  Foundation  ("Chatterjee  Charitable"),  of which Dr.
Chatterjee is a Trustee.

          (b)  (i) S-C Rig has sole power to direct  the voting and  disposition
of the 15,708,608  Shares held for its account  (includes  Shares  issuable upon
exercise of warrants).

               (ii)  S-C Rig Co.  has  sole  power  to  direct  the  voting  and
disposition of the 76,698 Shares held for its account.

                    S-C Rig Co.  may be deemed to have the sole  power to direct
the voting and  disposition of the 15,708,608  Shares held, or issuable upon the
exercise of the warrants  reported  herein as being held, for the account of S-C
Rig.

               (iii) Dr.  Chatterjee has the sole power to direct the voting and
disposition of the 745,484 Shares held for his account.

                    Dr.  Chatterjee  may be  deemed  to have the  sole  power to
direct the voting and  disposition  of the  16,954,889  Shares held, or issuable
upon the conversion or exercise of all of the  convertible  securities  reported
herein as being held,  for the accounts of S-C Rig, S-C Rig Co., CFM,  Furzedown
and Chatterjee Charitable.

          (c)       Except as  disclosed  in Annex A hereof,  there have been no
transactions  effected  with respect to the Shares since April 27, 1998 (60 days
prior to the date hereof) by any of the Reporting Persons.

          (d)  (i) The partners of S-C Rig have the right to  participate in the
receipt  of  dividends  from,  or  proceeds  from the sale  of,  the  securities
described  herein as being held for the  account of S-C Rig in  accordance  with
their partnership interests in S-C Rig.

               (ii) The  partners  of CFM have the right to  participate  in the
receipt of dividends  from, or proceeds  from the sale of, the Shares  described
herein as being held for the account of CFM in accordance with their partnership
interests in CFM.



<PAGE>


                                                              Page 8 of 12 Pages


               (iii) Dr. Chatterjee, as sole shareholder of S-C Rig Co., has the
right to participate in the receipt of dividends from, or proceeds from the sale
of, the Shares described herein as being held for the account of S-C Rig Co.

               (iv) Dr. Chatterjee has the sole right to receive dividends from,
or proceeds from the sale of, the Shares described herein as being held directly
for his personal account.

               (v) The  shareholders  of Furzedown have the right to participate
in the receipt of dividends from, and proceeds from the sale of Shares described
herein as being held  directly for the account of Furzedown in  accordance  with
their ownership interests in Furzedown.

               (vi) The beneficiaries of Chatterjee Charitable have the right to
participate  in the receipt of dividends  from,  and  proceeds  from the sale of
Shares  described  herein as being held  directly for the account of  Chatterjee
Charitable.

          (e) Not applicable.

Item 7.   Material to be Filed as Exhibits.

          C. Joint Filing Agreement,  dated as of June 26, by and among S-C Rig,
S-C Rig Co., CFM and Dr. Chatterjee.


<PAGE>


                                                              Page 9 of 12 Pages


                                   SIGNATURES

          After  reasonable  inquiry and to the best of my knowledge and belief,
the  undersigned  certifies that the  information set forth in this statement is
true, complete and correct.

Date: June 26, 1998                     S-C RIG INVESTMENTS, L.P.

                                        By:  S-C RIG CO., its General Partner

                                        By:  /S/ PETER HURWITZ
                                             ----------------------------------
                                             Peter Hurwitz
                                             Vice President


                                        S-C RIG CO.

                                        By:  /S/ PETER HURWITZ
                                             ----------------------------------
                                             Peter Hurwitz
                                             Vice President


                                        CHATTERJEE FUND MANAGEMENT, L.P.

                                        By:  Purnendu Chatterjee,
                                             General Partner

                                        By:  /S/ PETER HURWITZ
                                             ----------------------------------
                                             Peter Hurwitz
                                             Attorney-in-Fact


                                        PURNENDU CHATTERJEE

                                        By:  /S/ PETER HURWITZ
                                             ----------------------------------
                                             Peter Hurwitz
                                             Attorney-in-Fact




<PAGE>
<TABLE>
<CAPTION>


                                                                                      Page 10 of 12 Pages


                                                 ANNEX A

                                RECENT TRANSACTIONS IN THE COMMON STOCK OF
                                          R&B FALCON CORPORATION



                             Date of         Nature of                 Number of               Price Per
For the Account of         Transaction      Transaction                 Shares                  Shares
- ------------------         -----------      -----------                ---------               ---------
<S>                        <C>              <C>                        <C>                     <C>
S-C Rig                    5/01/98          Distribution/1/            1,000,000               Not Applicable
                           6/01/98          Sell                           1,000               $28.0000
                           6/02/98          Sell                          69,000               $28.0091
                           6/03/98          Sell                           1,700               $28.0000
                           6/23/98          Sell                         100,000               $24.1250
                           6/24/98          Sell                          36,800               $24.3055




- --------
/1/       On May 1, 1998 S-C Rig distributed  1,000,000 Shares to certain of its partners,  in accordance
          with the terms of its partnership agreement.


</TABLE>
<PAGE>

                                                             Page 11 of 12 Pages



                                  EXHIBIT INDEX

                                                                        Page No.
                                                                        --------


C.        Joint Filing  Agreement,  dated as of June 26, 1998, by
          and  among  S-C Rig  Investments,  L.P.,  S-C Rig  Co.,
          Chatterjee  Fund  Management,  L.P.  and  Dr.  Purnendu
          Chatterjee.............................................          12




                                                             Page 12 of 12 Pages

                                    EXHIBIT C

                             JOINT FILING AGREEMENT

         The  undersigned  hereby agree that the  statement on Schedule 13D with
respect to the Common  Stock of R&B Falcon  Corporation  dated June 26, 1998 is,
and any amendments  thereto signed by each of the undersigned shall be, filed on
behalf of us pursuant to and in accordance  with the provisions of Rule 13d-1(f)
under the Securities Exchange Act of 1934.

Date: June 26, 1998                     S-C RIG INVESTMENTS, L.P.

                                        By:  S-C RIG CO., its General Partner

                                        By:  /S/ PETER HURWITZ
                                             ----------------------------------
                                             Peter Hurwitz
                                             Vice President


                                        S-C RIG CO.

                                        By:  /S/ PETER HURWITZ
                                             ----------------------------------
                                             Peter Hurwitz
                                             Vice President


                                        CHATTERJEE FUND MANAGEMENT, L.P.

                                        By:  Purnendu Chatterjee,
                                             General Partner

                                        By:  /S/ PETER HURWITZ
                                             ----------------------------------
                                             Peter Hurwitz
                                             Attorney-in-Fact


                                        PURNENDU CHATTERJEE

                                        By:  /S/ PETER HURWITZ
                                             ----------------------------------
                                             Peter Hurwitz
                                             Attorney-in-Fact



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