TWEEDY BROWNE CO L P
SC 13D/A, 1998-01-30
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                  SCHEDULE 13D
                                (Amendment No.1)*
                                       of
                           Tweedy, Browne Company LLC


                                  SCHEDULE 13D
                                (Amendment No.1)*
                                       of
                               TBK Partners, L.P.


                                  SCHEDULE 13D
                                (Amendment No.1)*
                                       of
                            Vanderbilt Partners, L.P.



                    Under the Securities Exchange Act of 1934

                           SUN HEALTHCARE GROUP, INC.
- --------------------------------------------------------------------------------
                                (Name of Issuer)


                    Common Stock, Par Value $0.01 per share
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                   866933104
- --------------------------------------------------------------------------------
                                 (CUSIP Number)



                                 John D. Spears
                              52 Vanderbilt Avenue
                            New York, New York 10017
                                 (212) 916-0600
- --------------------------------------------------------------------------------
                 (Name, Address and Telephone Number of Persons
                Authorized to Receive Notices and Communications)




                                January 20, 1998
- --------------------------------------------------------------------------------
             (Date of Event which Required Filing of this Statement)


<PAGE>   2
 


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 [ ].


Check the following box if a fee is paid with the statement [ ]. (A fee is not
required only if the reporting 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
disclosures 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 the provisions of the Act (however, see the Notes).


<PAGE>   3

                                  

- ---------------------------                          ---------------------------
  CUSIP No.  866933104             SCHEDULE 13D            Page ___ of ___ Pages
- --------------------------------------------------------------------------------
1.      NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

        Tweedy, Browne Company LLC ("TBC")
- --------------------------------------------------------------------------------
2.      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*               (a) [ ]
                                                                        (b) [X]
- --------------------------------------------------------------------------------
3.      SEC USE ONLY

- --------------------------------------------------------------------------------
4.      SOURCE OF FUNDS*

        00
- --------------------------------------------------------------------------------
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
                                  TBC has sole voting power with respect to 
                                  2,817,944 shares held in certain TBC accounts
                                  (as hereinafter defined). Additionally, 
                                  certain of the general partners of TBC may be
                                  deemed to have sole power to vote certain
                                  shares as more fully set forth herein.
  NUMBER OF              -------------------------------------------------------
   SHARES                8.       SHARED VOTING POWER 
BENEFICIALLY
  OWNED BY                        0 shares
    EACH                 -------------------------------------------------------
 REPORTING               9.       SOLE DISPOSITIVE POWER
  PERSON                          0 shares, except that certain of the general
   WITH:                          partners of TBC may be deemed to have sole
                                  power to vote certain shares as more fully set
                                  forth herein.
                         -------------------------------------------------------
                         10.      SHARED DISPOSITIVE POWER
                                  3,057,159 shares held in accounts of TBC (as
                                  hereinafter defined).
- -------------------------------------------------------------------------------
11.     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        3,057,159 shares 
- --------------------------------------------------------------------------------
12.     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                                                                            [x]
- --------------------------------------------------------------------------------
13.     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
        6.16%
- --------------------------------------------------------------------------------
14.     TYPE OF REPORTING PERSON*
   
        BD IA & 00 
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

SEC 1746 (9-88) 2 of 7



<PAGE>   4

                                  

- ---------------------------                          ---------------------------
  CUSIP No.  866933104             SCHEDULE 13D            Page ___ of ___ Pages
- --------------------------------------------------------------------------------
1.      NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

        TBK Partners, L.P. ("TBK")
- --------------------------------------------------------------------------------
2.      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*               (a) [ ]
                                                                        (b) [X]
- --------------------------------------------------------------------------------
3.      SEC USE ONLY

- --------------------------------------------------------------------------------
4.      SOURCE OF FUNDS*

        WC and BK
- --------------------------------------------------------------------------------
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
                                  188,475 shares, except that the general 
                                  partners in TBK, solely by reason of their
                                  positions as such, may be deemed to have
                                  shared power to vote these shares.
  NUMBER OF              -------------------------------------------------------
   SHARES                8.       SHARED VOTING POWER 
BENEFICIALLY
  OWNED BY                        Q shares
    EACH                 -------------------------------------------------------
 REPORTING               9.       SOLE DISPOSITIVE POWER
  PERSON                          188,475 shares, except that the general
   WITH:                          partners in TBK, solely by reason of their
                                  positions as such, may be deemed to have 
                                  shared power to vote these shares.
                         -------------------------------------------------------
                         10.      SHARED DISPOSITIVE POWER
                                  0 shares 
- -------------------------------------------------------------------------------
11.     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        188,475 shares 
- --------------------------------------------------------------------------------
12.     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                                                                            [ ]
- --------------------------------------------------------------------------------
13.     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
        0.38%
- --------------------------------------------------------------------------------
14.     TYPE OF REPORTING PERSON*
   
        PN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

SEC 1746 (9-88) 2 of 7







<PAGE>   5

                                  

- ---------------------------                          ---------------------------
  CUSIP No.  866933104             SCHEDULE 13D            Page ___ of ___ Pages
- --------------------------------------------------------------------------------
1.      NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

        Vanderbilt Partners, L.P. ("Vanderbilt")
- --------------------------------------------------------------------------------
2.      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*               (a) [ ]
                                                                        (b) [X]
- --------------------------------------------------------------------------------
3.      SEC USE ONLY

- --------------------------------------------------------------------------------
4.      SOURCE OF FUNDS*

        WC and BK
- --------------------------------------------------------------------------------
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
                                  50,740 shares, except that the general 
                                  partners in Vanderbilt, solely by reason of 
                                  their positions as such, may be deemed to have
                                  shared power to vote these shares.
  NUMBER OF              -------------------------------------------------------
   SHARES                8.       SHARED VOTING POWER 
BENEFICIALLY
  OWNED BY                        0 shares
    EACH                 -------------------------------------------------------
 REPORTING               9.       SOLE DISPOSITIVE POWER
  PERSON                          50,740 shares, except that the general
   WITH:                          partners in Vanderbilt, solely by reason of 
                                  their positions as such, may be deemed to  
                                  have shared power to vote these shares.
                         -------------------------------------------------------
                         10.      SHARED DISPOSITIVE POWER
                                  0 shares 
- -------------------------------------------------------------------------------
11.     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        50,740 shares 
- --------------------------------------------------------------------------------
12.     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                                                                            [ ]
- --------------------------------------------------------------------------------
13.     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
        0.10%
- --------------------------------------------------------------------------------
14.     TYPE OF REPORTING PERSON*
   
        PN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

SEC 1746 (9-88) 2 of 7










<PAGE>   6
PRELIMINARY NOTE

         The persons filing this Amendment No. 1 are (i) Tweedy, Browne Company
LLC ("TBC"), a Delaware limited liability company, (ii) TBK Partners, L.P.
("TBK"), a Delaware limited partnership and (iii) Vanderbilt Partners, L.P.
("Vanderbilt"), a Delaware limited partnership. This Amendment No. 1 amends a
Statement on Schedule 13D filed by TBC, TBK and Vanderbilt dated October 21,
1996 ( the "Statement"). The filing of this Amendment No. 1 should not be deemed
an admission that TBC, TBK and Vanderbilt comprise a group within the meaning of
Section 13(d) (3) of the Securities and Exchange Act of 1934, as amended (the
"Act").

         Tweedy, Browne Company L.P., a Delaware limited partnership (the
"Partnership") and its general partners entered into a definitive agreement,
pursuant to which the Partnership converted to Tweedy, Browne Company LLC (the
"Company"), a Delaware limited liability company, and AMG/TBC Holdings, Inc.
("Holdings"), a Delaware corporation and wholly owned subsidiary of Affiliated
Managers Group, Inc. (a Boston-based holding company, the business address of
which is Two International Place, Boston, Massachussets 02110), acquired a
majority interest in the Company on October 9, 1997.

         This Amendment No. 1 relates to the Common Stock, $.01 par value (the
"Common Stock"), of Sun Healthcare Group, Inc. (The "Company"), which, to the
best knowledge of the persons filing this Amendment No. 1, is a company
organized under the laws of Delaware, with its principal executive offices at
101 Sun Lane, N.E., Albuquerque, New Mexico 87109.

         This Amendment No. 1 contains information regarding shares of Common
Stock that may be deemed to be beneficially owned by TBC. Such shares are held
in the accounts of various customers of TBC, with respect to which it has
obtained sole or shared voting power.

         Other than as set forth below, to the best knowledge of TBC, TBK and
Vanderbilt, there has been no material change in the information set forth in
response to Items 1,2,4,6 and 7 of the Statement, as amended. Accordingly, those
Items are omitted from this Amendment No. 1.

ITEM 3.  SOURCE AND AMOUNTS OF FUNDS OR OTHER CONSIDERATION

         As of the date hereof, the number of shares with respect to which TBC
may be deemed to be the beneficial owner is 2,817,944 shares of Common Stock
(the "TBC Shares"), all of which shares were purchased in open market
transactions. The aggregate cost of the TBC Shares, including brokerage
commissions, was $39,651,382.

         The TBC Shares are held in the TBC Accounts, the funds therefor coming
from the funds on hand in each individual managed account and in certain
instances from standard margin account borrowings from brokerage accounts
maintained at Fleet Clearing Corporation. It is expected that funds used by the
TBC Accounts to purchase additional shares of Common Stock, if additional shares
are purchased by the TBC Accounts (see Item 4 of the Statement), will come from
the funds on hand for each individual managed account, which funds on hand at
any time and from time to time may include, among others, funds borrowed
pursuant to margin accounts maintained at Fleet Clearing Corporation. Borrowings
made by certain TBC Accounts pursuant to such margin accounts are secured by
margin securities owned by the respective accounts, including some of the TBC
Shares. Interest on outstanding borrowings under such margin accounts ranges
from 1/2% to 2% over the brokers' call rate in effect from time to time at Chase
Manhattan Bank, New York, New York, depending upon the amount of outstanding
borrowings at any given time.

         As of the date hereof, TBK beneficially owns directly 188,475 shares of
Common Stock (the "TBK Shares"), all of which shares were purchased in open
market transactions. The aggregate cost of the TBK Shares, including brokerage
commissions, was $2,398,704.


<PAGE>   7




         It is expected that funds used by TBK to purchase additional shares of
Common Stock, if additional shares are purchased by TBK (see Item 4 of the
Statement), will come from TBK's general funds, which include cash and cash
equivalents on hand and in banks.

         TBK's general funds have included, and it is expected that they will
from time to time include, funds borrowed by it pursuant to an understanding
with Chase Manhattan Bank. As of the date hereof, TBK has a loan outstanding
with Chase Manhattan Bank in the amount of $20,000. Borrowings made by TBK
pursuant to that understanding bear interest at the brokers' call rate in effect
from time to time at Chase Manhattan Bank. TBK's funds may also include funds
borrowed pursuant to a Line of Credit Agreement between TBK and Boston Safe
Deposit and Trust Company. Pursuant to the Line of Credit Agreement, TBK may
borrow up to $15,000,000 at the brokers' call rate charged from time to time by
Boston Safe Deposit & Trust Company. Borrowings made by TBK pursuant to its
understandings with Chase Manhattan Bank and the Line of Credit Agreement with
Boston Safe Deposit and Trust Company are secured by securities owned by TBK;
such borrowings are not secured by any TBK Shares. No borrowings from Chase
Manhattan Bank or Boston Safe Deposit and Trust Company were made for the
purpose of acquiring the TBK Shares. TBK reserves the right to include all or
any of the shares of Common Stock owned by it at any time or from time to time,
among the securities that serve as collateral for such borrowings, subject to
compliance with any applicable statutes and regulations.

         As of the date hereof, Vanderbilt beneficially owns directly 50,740
shares of Common Stock (the "Vanderbilt Shares"), all of which shares were
purchased in open market transactions. The aggregate cost of the Vanderbilt
Shares, including brokerage commissions, was $665,563.

         It is expected that funds used by Vanderbilt to purchase additional
shares of Common Stock, if additional shares are purchased by Vanderbilt (see
Item 4 of the Statement), will come from Vanderbilt's general funds, which
include cash and cash equivalents on hand and in banks.

         Vanderbilt's funds may include funds borrowed pursuant to a Line of
Credit Agreement between Vanderbilt and Boston Safe Deposit and Trust Company.
Pursuant to the Line of Credit Agreement, Vanderbilt may borrow up to $2,000,000
at the brokers' call rate charged from time to time by Boston Safe Deposit &
Trust Company. Borrowings made by Vanderbilt pursuant to the Line of Credit
Agreement with Boston Safe Deposit and Trust Company are secured by securities
owned by Vanderbilt; such borrowings are not secured by any Vanderbilt Shares.
No borrowings from Boston Safe Deposit and Trust Company were made by Vanderbilt
for the purpose of acquiring the Vanderbilt Shares. Vanderbilt reserves the
right to include all or any of the shares of Common Stock owned by it at any
time or from time to time, among the securities that serve as collateral for
such borrowings, subject to compliance with any applicable statutes and
regulations.

ITEM 5.  INTEREST IN SECURITIES OF THE ISSUER

         (a) As of the date hereof, TBC may be deemed to be the beneficial owner
of an aggregate of 2,817,944 shares of Common Stock, which constitutes
approximately 5.68% of the 49,597,000 shares of Common Stock which TBC believes
to be the total number of shares of Common Stock outstanding. The TBC Shares are
held in the TBC Accounts.

         Also included in the TBC shares are 845 shares of Common Stock held in
a TBC Account for a charitable foundation of which Christopher H. Browne is a
trustee. Mr. Browne is a member of TBC and a general partner of TBK and
Vanderbilt.

         Also included in the TBC shares are 50,600 shares of Common Stock held
in certain TBC Accounts, of which John D. Spears, a member of TBC and a general
partner of TBK and Vanderbilt, may be deemed to beneficially own directly. Of
these 50,600 shares of Common Stock, 47,300 shares are held in a TBC Account for
John D. Spears and 3,300 shares are held jointly in a TBC Account for John D.
Spears and his wife.


<PAGE>   8




         As of the date hereof, TBK beneficially owns directly 188,475 shares of
Common Stock, which constitutes approximately 0.38% of the 49,597,000 shares of
Common Stock which TBK believes to be the total number of shares of Common Stock
outstanding.

         As of the date hereof, Vanderbilt beneficially owns directly 50,740
shares of Common Stock, which constitutes approximately 0.10% of the 49,597,000
shares of Common Stock which Vanderbilt believes to be the total number of
shares of Common Stock outstanding.

         Each of TBC, TBK and Vanderbilt disclaims that it is the beneficial
owner of any of the shares of Common Stock held in the TBC Accounts. The
aggregate number of shares of Common Stock with respect to which TBC, TBK and
Vanderbilt could be deemed to be the beneficial owner as of the date hereof, is
3,057,159 shares, which constitutes approximately 6.16% of the 49,597,000 shares
of Common Stock, which the filing persons believe to be the total number of
shares of Common Stock outstanding, but nothing contained herein shall be
construed as an admission that TBC is the beneficial owner of any of the TBC
Shares.

         The aggregate number of shares and percentage of Common Stock with
respect to which each of the General Partners may be deemed to be the beneficial
owner by reason of his being a general partner of TBC, TBK and Vanderbilt,
respectively, is 3,057,159 shares, which constitutes approximately 6.16% of the
49,597,000 shares of Common Stock outstanding. The aggregate number of shares
and percentage of Common Stock with respect to which Thomas P. Knapp may be
deemed to be a beneficial owner by reason of his being a general partner of TBK
is 188,475 shares of Common Stock which constitutes approximately 0.38% of the
49,597,000 shares of Common Stock outstanding. However, nothing contained herein
shall be construed as an admission that any of the General Partners or Thomas P.
Knapp is the beneficial owner of any shares of Common Stock, except as set forth
herein as expressly and admittedly being beneficially owned by a particular
General Partner or Thomas P. Knapp.

         Each of TBC, TBK and Vanderbilt disclaims beneficial ownership of
Common Stock held by the other. Except as described herein, to the best
knowledge of TBC, TBK and Vanderbilt, no person who may be deemed to comprise a
group with any of TBC, TBK, Vanderbilt, or any other person named in Item 2 of
the Statement, beneficially owns any shares of Common Stock.

         (b) TBC has investment discretion with respect to 2,817,944 shares of
Common Stock held by the TBC Accounts and has sole power to dispose or direct
the disposition of all of such shares. Of these shares of Common Stock, TBC has
sole power to vote or to direct the voting of 2,606,069 shares of Common Stock
held in certain TBC Accounts.

         Each of the General Partners of TBC, solely by reason of their
positions as such, may be deemed to have (i) shared power to dispose of or to
direct the disposition of all of the shares of Common Stock held in the TBC
Accounts; and (ii) shared power to vote or direct the vote of 2,606,069 shares
of Common Stock held in certain TBC Accounts.

         TBK has the sole power to vote or direct the voting of and dispose or
direct the disposition of the TBK Shares. Each of the General Partners and
Thomas P. Knapp, solely by reason of their positions as general partners, may be
deemed to have shared power to vote or direct the vote of and to dispose or
direct the disposition of the TBK Shares.

         Vanderbilt has the sole power to vote or direct the voting of and
dispose or direct the disposition of the Vanderbilt Shares. Each of the General
Partners of Vanderbilt, solely by reason of their positions as such, may be
deemed to have shared power to vote or direct the vote of and to dispose or
direct the disposition of the Vanderbilt Shares.


<PAGE>   9



         (c) No transactions in Common Stock were effected by TBK and Vanderbilt
during the sixty-day period ended as of the date hereof. During the sixty-day
period ended as of the date hereof, TBC has purchased and sold shares of the
Common Stock in open market transactions, as follows:

<TABLE>
<CAPTION>
REPORTING                           NO. OF SHARES             NO. OF SHARES             PRICE
PERSON            DATE              PURCHASED                 SOLD                    PER SHARE

<S>               <C>                <C>                                              <C>  <C>
TBC Accounts      12/10/97             2,210                                            $ 20 3/8
                  12/12/97                                       2,415                  $ 19 13/16
                  01/05/98            11,000                                            $ 19.71306
                  01/06/98                                         400                  $ 19 3/4
                  01/07/98            76,000                                            $ 19 1/4
                  1/20/98             96,300                                            $ 19.7274
</TABLE>


         (d) To the best knowledge of TBC, each of the persons maintaining an
account with TBC has the right to receive or the power to direct the receipt of
dividends from, or the proceeds from the sale of, the shares of Common Stock
held in said person's TBC Account.

         To the best knowledge of TBK, no person other than TBK has the right to
receive or the power to direct the receipt of dividends from, or the proceeds
from the sale of, the TBK Shares, except that the General Partners and Thomas P.
Knapp may be deemed to have such rights and powers solely by reason of being
general partners in TBK.

         To the best knowledge of Vanderbilt, no person other than Vanderbilt
has the right to receive or the power to direct the receipt of dividends from,
or the proceeds from the sale of, the Vanderbilt Shares, except that the General
Partners in Vanderbilt may be deemed to have such rights and powers solely by
reason of being general partners in Vanderbilt.

         (e) Not applicable.


<PAGE>   10




                                    SIGNATURE

         Each of Tweedy, Browne Company LLC., TBK Partners, L.P. and Vanderbilt
Partners, L.P., after reasonable inquiry and to the best of its knowledge and
belief, hereby certifies that the information set forth in this Statement is
true, complete and correct.

                                            TWEEDY, BROWNE COMPANY LLC

                                            By /s/Christopher H. Browne
                                              ------------------------------
                                               Christopher H. Browne
                                               Member


                                            TBK PARTNERS, L.P.

                                            By /s/Christopher H. Browne
                                              ------------------------------
                                               Christopher H. Browne
                                               General Partner


                                            VANDERBILT PARTNERS, L.P.

                                            By /s/Christopher H. Browne
                                              ------------------------------
                                               Christopher H. Browne
                                               General Partner

Dated:   January 29, 1998



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