UNIHOLDING CORP
8-K, 1997-03-07
MEDICAL LABORATORIES
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<PAGE>
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                    FORM 8-K

                                 CURRENT REPORT

         Pursuant to Section 13 or 15(d) of the Securities Exchange Act
of 1934


Date of Report (Date of earliest event reported) February 20, 1997



                             UNIHOLDING CORPORATION
     0           ------------------------------------------------
             (Exact name of registrant as specified in its charter)


        Delaware              0-9833              58-1443790
- -----------------------------------------------------------------
(State or other jurisdiction  (Commission        (IRS Employer
   of incorporation)          File Number)    Identification No.)



  96 Spring Street, New York, New York              10012
- -----------------------------------------------------------------
(Address of principal executive offices)         (Zip Code)


Registrant's telephone number, including area code (212) 219-9496


<PAGE>




Item 2.  Acquisition or Disposition of Assets.

         The  registrant's  subsidiaries  sold 5% of the shares of Unilabs SA, a
Switzerland   corporation   ("ULSA")  to  each  of  three   institutions.   More
specifically,  the registrant's subsidiaries entered into and closed three Share
Purchase  Agreements  dated  January 17,  February 6 and February 17, 1997 with,
respectively,  as  purchasers,  EIBA  "Eidgenoessische  Bank"  Beteiligungs  und
Finanzgesellschaft  (a Swiss bank  wholly-owned  by Union Bank of  Switzerland),
Banque  Cantonale  de Geneve  and KK Trust AG.  The  third  Agreement  closed on
February 20, 1997. [CERTAIN CONFIDENTIAL PORTION OF INFORMATION HAS BEEN OMITTED
PURSUANT TO RULE 24b-2 AND FILED SEPARATELY WITH THE COMMISSION.] As a result of
this series of transactions,  the Company has sold 15% of the shares of ULSA and
the Company now owns approximately 79% of ULSA.

         ULSA  and its  subsidiaries  operate  a  European  clinical  laboratory
network, including 20 laboratories and 27 specimen collection centers.

         As  announced  on  February  21,  1997,  ULSA has  retained  bankers in
connection with a proposed  initial public offering in Switzerland that may lead
to a listing of ULSA on the Swiss Stock  Exchange  during the second  quarter of
1997. The  lead-manager of the proposed initial public offering is Union Bank of
Switzerland (the parent of the first purchaser listed above).


























                                                          1

<PAGE>



Item 7.  Financial Statements and Exhibits.

(b)      Pro forma financial information.

         Any pro forma financial  information that would be required pursuant to
         Article 11 of Regulation S-X.


(c)      Exhibits

         (2-1)             Share Purchase Agreement between Unilabs Management
                           Co. Ltd, as Seller, and EIBA "Eidgenoessische Bank"
                           Beteiligungs und Finanzgesellschaft, as Purchaser,
                           dated January 17, 1997.

         (2-2)             Share Purchase Agreement between Unilabs Group
                           Limited and Unilabs Management Co. Ltd. and Banque
                           Cantonale de Geneve, dated February 6, 1997.

         (2-3)             Share  Purchase   Agreement   between  Unilabs  Group
                           Limited and KK Trust AG., dated February 17, 1997.
































                                                          2

<PAGE>



                                   SIGNATURES


         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                  UNIHOLDING CORPORATION
                                       (Registrant)


Date:  March 7, 1997              By: /s/ BRUNO ADAM
                                  ----------------------------
                                  BRUNO ADAM
                                  Chief Financial Officer




                                                          3







                                  EXHIBIT (2-1)





                            SHARE PURCHASE AGREEMENT



                                     BETWEEN



                     Unilabs Management Co. Ltd., Gibraltar

                                    as Seller



                                       AND



                               Unilabs SA, Geneva

                                  as Guarantor



                                       AND



             EIBA "Eidgenossische Bank" Beteiligungs- und Finanzge-
                               sellschaft, Zurich

                                  as Purchaser



                   Relating to 5% of the Shares in Unilabs SA



                                Lenz & Staehelin
                                     Zurich


                                                          4

<PAGE>





This Share  Purchase  Agreement was entered into on January 17, 1997 between the
following parties:

1.       Unilabs Management Co. Ltd., Gibraltar

         (hereinafter referred to as "Seller")


2.       Unilabs SA, Place Cornavin 12, 1211 Geneva 11

         (hereinafter referred to as the "Company")

                                                              of the first part

                                       and

3.       "EIBA Eidgenossische Bank" Beteiligungs - und  Finanzge-
         sellschaft, Bleicherweg 30, 8021 Zurich

         (hereinafter referred to as "Purchaser")

                                                              of the other part


Introduction
The Seller is a wholly-owned subsidiary of the Company currently

                                                          5

<PAGE>



holding 10% of the Company's issued and outstanding share capital.

The  Company  intends to do an initial  public  offering  ("IPO") by listing its
shares on the Swiss Stock  Exchange.  For  purposes of  preparing  the IPO,  the
Company is  restructuring  its debt and equity  financings  and the Purchaser is
prepared to buy an equity interest in the Company.

Based on the foregoing, the Parties agree as follows:

1.       Sale and Purchase of Shares

         The Seller agrees to sell to the Purchaser and the Purchaser  agrees to
         buy from the  Seller 800 bearer  shares of the  Company  with a nominal
         value of Sfrs. 500.-- each,  representing 5% of the total of the issued
         and outstanding share capital of the Company  (hereinafter  referred to
         as the "Shares").

2.       Purchase Price

         The purchase price for the Shares shall be Sfrs. [Confidential Portion]
         in the aggregate  (the "Purchase  Price").  The Purchase Price shall be
         payable at the  Closing (as  defined  under  Section 3.1 below) by wire
         transfer  to the  account to be  designated  by the Seller and  against
         delivery of the Shares.

3.       Closing

                                                          6

<PAGE>



3.1      Closing Date of Transaction

         The sale and purchase of the Shares shall be consummated at the offices
         of Union Bank of  Switzerland or at such other place as the Parties may
         agree,  no later than 10 days after the conditions  precedent set forth
         in Section 3.2 below have been met.

3.2      Conditions Precedent

         The  sale and  purchase  of the  Shares  contemplated  herein  shall be
         subject to the following  conditions being met on or before January 31,
         1997:

         a)       Due Diligence:  The Purchaser has conducted a due
                  -------------
                  diligence  audit of the  business of the Company  prior to the
                  Closing.  The  results of such due  diligence  audit  shall be
                  satisfactory  to  the  Purchaser.  In  particular,   such  due
                  diligence  audit  shall  not  reveal  any  material   problems
                  regarding the Company's  subsidiaries  in the United  Kingdom.
                  Furthermore,  the Company's new auditors, ATAG Ernest & Young,
                  shall have  confirmed  to the  Purchaser  in writing  that the
                  Company's  investments in the  subsidiaries in Spain and Italy
                  do not need to be written  down and that any  write-offs  that
                  may be necessary with respect to the Company's  investments in
                  its subsidiaries in the United Kingdom will not exceed

                                                          7

<PAGE>



                  the amount of Sfrs. 33,3 million.

         b)       Group Restructuring:  The Purchaser shall have obtained a
                  legal opinion regarding the valid legal transfer of the
                  following companies from UniHolding Corporation,
                  Delaware, to the Company:

                  -        United Laboratories Espana SA (93%)
                  -        Istituto Medico Torino S.p.A. (100%)
                  -        Medil Srl (50%)

                  In addition,  the Purchaser  shall have obtained a tax opinion
                  regarding   the  tax   consequences   of  such   transfer  the
                  conclusions of which shall be satisfactory to the Purchaser.

         c)       Credit Facility Agreement:  Delivery of executed credit
                  facility agreement between the Company and Union Bank of
                  Switzerland relating to a term loan of Sfrs. 12.5
                  million.

         d)       Shareholders Agreement:    Execution and delivery of a
                  shareholders agreement (the "Shareholders Agreement")
                  between Unilabs Group Ltd. and the Purchaser at terms
                  satisfactory to the Purchaser.

         e)       Board Approval:            Approval of the purchase of the

                                                          8

<PAGE>



                  Shares by the board of directors of the Purchaser.

         f)       Election of Board Member:  Resolution of Unilabs Group
                  Ltd. as majority shareholder of the Company electing a
                  representative of the Purchaser to the Company's board of
                  directors.

4.       Representations and Warranties of Seller and Company

         Each of the Seller and the Company  hereby  represents  and warrants to
         the Purchaser, such representations and warranties to be true as of the
         signing of this Agreement and at Closing, the following:

         a)       Legal Existence:                   The Company and each of its
                  ---------------
                  subsidiaries listed in Exhibit 1 (the "Subsidiaries") is
                                         ---------
                  a corporation duly incorporated and validly existing under the
                  laws of the jurisdiction in which it is incorporated,  capable
                  of being sued in its own right.  The  Company has the power to
                  own its property and assets and the  authority to carry on its
                  business as currently conducted.

         b)       Ownership Structure:  The Company has a share capital of
                  Sfrs. 8,000,000.--, divided into 16,000 shares with a
                  nominal value of Sfrs. 500.-- each.  No further capital,
                  non-voting stock, convertible securities or similar

                                                          9

<PAGE>



                  rights  in the  Company  have been or will by the  Closing  be
                  created or issued or agreed to be issued. The Shares have been
                  validly   issued  and  fully  paid-up.   Notwithstanding   the
                  foregoing,  a restructuring  of the Company's share capital is
                  currently  contemplated in view of the IPO. A proposal for the
                  Company's new dual capital structure is shown in Exhibit 1a.


         c)       Ownership.  The Seller is the sole legal and beneficial
                  owner of the Shares, free and clear of all liens,
                  encumbrances, options, charges and other claims arising
                  from any privilege, pledge or security arrangement.  The
                  Seller has full right and capacity to transfer and sell
                  the Shares.

                  Upon delivery of the Shares,  the Purchaser  will receive good
                  and valid  title to the  Shares,  free and clear of all liens,
                  encumbrances or other rights of third parties.

         d)       Annual Accounts:  The latest annual accounts and
                  consolidated annual accounts as per May 31, 1996 of the
                  Company and of each Subsidiary (as delivered to the
                  Purchaser in the course of the financial due diligence
                  audit) fairly represent the financial situation of the
                  Company (consolidated and non-consolidated) and of the
                  Subsidiaries as per the balance sheet date and have been

                                                          10

<PAGE>



                  prepared in  compliance  with  generally  accepted  accounting
                  principles as applied in the United States (US GAAP) or in the
                  country where the relevant Subsidiary is incorporated.

         e)       Assets:  Except as disclosed in Exhibit 2, the Company
                  ------                          ---------
                  and each of the Subsidiaries owns all real property,  personal
                  property and other assets, tangible and intangible,  reflected
                  in the  latest  annual  balance  sheet of the  Company  or the
                  relevant  Subsidiary,  free and clear of all  liens,  charges,
                  security interest and other encumbrances.  There are no assets
                  which are used in the  conduct of the  business of the Company
                  or any of its  Subsidiaries  which  are not  reflected  in the
                  latest  annual  balance  sheet of the Company or the  relevant
                  Subsidiary.

         f)       Accounts Receivable:  The accounts receivable reflected in the
                  latest annual  accounts of the Company and of each  Subsidiary
                  are fully  collectible  within 90 days and, to the extent they
                  are not fully  collectible,  whether or not within a period of
                  90 days,  the Company or the relevant  Subsidiary  has created
                  provisions sufficient to cover any shortfall.

         g)       No Undisclosed Liabilities:  None of the Company and the
                  Subsidiaries have any liabilities or obligations of any
                  nature (absolute, accrued, contingent or otherwise),

                                                          11

<PAGE>



                  which are not  fully  reflected  or  reserved  against  in the
                  latest  annual   accounts  of  the  Company  or  the  relevant
                  Subsidiary.

         h)       Books and Records:  The Company and each Subsidiary is in
                  possession and has accurately kept all accounts, books,
                  letters, financial and other records as required by
                  applicable law.

         i)       Taxes:  The Company and each Subsidiary has timely filed
                  all tax returns for income tax, withholding taxes, stamp
                  taxes, sales taxes, social security taxes and all other
                  taxes of every kind whatsoever required by law to be
                  filed and all such tax returns are complete and accurate.

                  The Company and each  Subsidiary has paid all taxes which have
                  become due and there is no further liability for any taxes and
                  no  interests or  penalties  accrued or accruing  with respect
                  thereto which would exceed the provisions  created in the last
                  balance  sheet  of  the  Company  or the  relevant  Subsidiary
                  specifically for such liabilities, interests or penalties.

         j)       No Material Adverse Change:  Except as disclosed in
                  Exhibit 5, attached hereto, since the last balance sheet
                  date of May 31, 1996, the financial situation
                  (consolidated and non-consolidated) of the Company or its

                                                          12

<PAGE>



                  business has not been affected by any material adverse
                  change.

         k)       Permits and Authorizations:  The Company and each
                  Subsidiary has all the permits and authorizations which
                  are necessary to carry on its business and neither the
                  execution of this Agreement nor the consummation of the
                  transaction contemplated herein will affect the
                  effectiveness of such permits and authorizations.

         l)       Compliance with Applicable Laws:  In conducting its
                  -------------------------------
                  business  as  currently   conducted,   the  Company  and  each
                  Subsidiary  is  in  compliance   with  all  applicable   laws,
                  statutes,  orders,  rules and regulations of any  governmental
                  authority.  Without  limiting the generality of the foregoing,
                  the  Company and each  Subsidiary  is in  compliance  with all
                  environmental laws, regulations, orders and decrees applicable
                  to it.

         m)       Insurance:  The insurance policies of the Company and of
                  each Subsidiary adequately cover the risks associated
                  with the business of the Company and the relevant
                  Subsidiary.

         n)       Intellectual Property Rights:  The Company and each
                  Subsidiary owns all the knowhow, patents, trademarks,
                  copyrights and other intellectual property rights, if

                                                          13

<PAGE>



                  any,  which are  necessary  for or used in the  conduct of its
                  business as it is now being conducted or has adequate  license
                  to such rights. None of such patents,  trademarks,  copyrights
                  or other  intellectual  property  rights violate the rights of
                  any third party.

         o)       Information Technology:  The Company and each subsidiary
                  has the rights to the information technology necessary to
                  conduct the business as currently conducted and such
                  rights will continue to be effective at least until
                  December 31, 1998.  Exhibit 4 contains a complete list of
                  information technology rights (licenses, source codes,
                  etc.) currently used by the Company and the Subsidiaries.

         p)       No Litigation:  No litigation, arbitration,
                  -------------
                  administrative  proceedings  (including  tax  proceedings)  or
                  governmental or regulatory  investigations  are pending or, to
                  the best of the  Company's or Seller's  knowledge,  threatened
                  against  the  Company  or  any  Subsidiary  and  there  are no
                  judgments or decisions which could  jeopardize the conclusion,
                  performance or enforceability of this Agreement or which could
                  otherwise adversely affect this Agreement.

         q)       Group Structure:  The group structure shown in Exhibit 1
                  is complete and accurate; except with resect to vivagen
                  diagnostics AG and SQ-Lab Aerztelabor AG, the share

                                                          14

<PAGE>



                  capital of each group company is fully paid-in.

         r)       Intercompany Dealings:  Except as disclosed to the
                  Purchaser in Exhibit 5, all intercompany dealings between
                  companies of the group shown in Exhibit 1 or between
                  group companies and related parties have been made at
                  market conditions (arm's length).

         s)       Full Disclosure:  The information and material provided
                  ---------------
                  by the  Company  to the  Purchaser  for  purposes  of the  due
                  diligence  audit  (legal,  financial and business) is complete
                  and accurate in every material  respect and no information has
                  been withheld from the Purchaser which would have affected its
                  decision to enter into this  Agreement.  Without  limiting the
                  generality  of the  foregoing,  there  are no oral or  written
                  agreements  that have not been  disclosed to the Purchaser and
                  which could affect the present or future  ownership  structure
                  of the Company.

5.       Covenant

         Each of the Seller and the company hereby covenants that any agreements
         concluded with KK Trust AG or any other equity investor involving a put
         option  of the  equity  investor  with  respect  to the  shares  of the
         Company, or any contractual provisions equivalent to a put option, have
         to adequately

                                                          15

<PAGE>



         protect the rights of the Purchaser under the  Shareholders  Agreement.
         Without  limiting the  generality of the  foregoing,  any put option or
         other  preferential  sales  rights of KK Trust AG or any  other  equity
         investor  are to be  subordinated  in all  respects  to the put  option
         granted to the Purchaser under the Shareholders Agreement.

6.       Remedies

6.1      Term of Representations and Warranties

         The  representations  and  warranties  set  forth in  Section 4 of this
         Agreement  shall  continue to be in effect  until  December  31,  1997.
         Notice of claims may be given by the  Purchaser  in  writing  until and
         including December 31, 1997.

         The Purchaser is not bound by any  examination  or notice  requirements
         otherwise  applicable  under Swiss law, except that upon discovery of a
         claim notice  shall be given by the  Purchaser to the Seller as soon as
         reasonably practicable,  subject to the overall limitation provided for
         in the preceding paragraph.

6.2      Remedies

         In case of a breach of a representation and warranty or
         covenant by the Seller or the Company, the Seller and the

                                                          16

<PAGE>



         Company  shall  be  jointly  and  severally  liable  to  indemnify  the
         Purchaser  against all losses  suffered by the Purchaser as a result of
         any such  misrepresentations or breach of warranty or covenant. In case
         of  a  breach  of  representations  and  warranties,   the  losses  are
         calculated  based on the difference  between the actual net asset value
         of the Company, on a consolidated basis, and the consolidated net asset
         value of the Company had the relevant  representation and warranty been
         accurate.  With  respect  to a  breach  of  covenant,  the  losses  are
         calculated  based on the actual  damage  incurred by the Purchaser as a
         result of such breach.

         In addition, if the indemnity claim made by the Purchaser in accordance
         with the preceding paragraph exceeds an amount of Sfrs. 2 million,  the
         Purchaser  shall  have the  right at any  time  during  the term of the
         representations  and  warranties  pursuant  to  Section  6.1  above  to
         exercise  its put option  pursuant to Section  6.2 of the  Shareholders
         Agreement.  Notwithstanding  the  exercise  of the  put  option  by the
         Purchaser,  the Purchaser shall be entitled to claim losses and damages
         as a result of a misrepresentation or breach of warranty or covenant.

6.3      Limitation

         No  claims  may be  raised  by the  Purchaser  under  Section 4 of this
         Agreement, unless such claims in each single case of

                                                          17

<PAGE>



         breach of warranty exceed Sfrs. 50'000.-- and, in the
         aggregate, reach an amount of Sfrs. 100'000.--.  For the
         avoidance of doubt, if the claim of the Purchaser exceeds in
         the aggregate Sfrs. 100'000.--, the Purchaser is entitled to
         claim from the Seller and or the Company the entire amount and
         not only the amount in excess of Sfrs. 100'000.--.

7.       Joint and Several Liability

         The Company agrees to be jointly and severally  liable to the Purchaser
         for the performance of any and all obligations of the Seller under this
         Agreement.

8.       Miscellaneous

8.1      Costs and Expenses

         All  reasonable  costs  and  expenses  incurred  by  the  Purchaser  in
         connection with the preparation, negotiation, execution and performance
         of this Agreement  shall be borne by the Seller,  including legal fees.
         The Seller and the Company shall bear their own costs and expenses.

8.2      Arranging Fee

         EIBA shall be entitled to an arranging fee of 1.75% of the
         Purchase Price.  Provided the Company enters into a credit

                                                          18

<PAGE>



         facility agreement with Union Bank of Switzerland, EIBA's arranging fee
         will be paid-out of, and will be an integral part of, the arranging fee
         payable to Union Bank of  Switzerland  in accordance  with the terms of
         the credit facility agreement.
8.3      Taxes

         Any taxes or other  charges  which  become due in  connection  with the
         execution or performance of this Agreement, such as securities transfer
         tax, shall be shared equally between the Seller and the Purchaser.

8.4      Notices

         Communications under this Agreement shall be made in writing by letter,
         telex or telefax and addressed as follows:

         if to the Purchaser:

         EIBA "Eidgenossische Bank"
         Beteiligungs- und Finanzgesellschaft
         Mr. Daniel Furtwangler
         Bleicherweg 30
         8021 Zurich
         Tel.:  +41-1-281 10 81
         Fax :  +41-1-281 10 87

         if to the Seller or the company:

         Unilabs SA
         Mr. Eric Wavre
         12, place Cornavin
         1201 Geneva
         Tel.:  +41-22-909-7777
         Fax :  +41-22-909-7707

                                                          19

<PAGE>




8.5      Entire Agreement

         This Agreement embodies the entire agreement between the parties hereto
         with respect to the transaction contemplated herein and there have been
         and are no  agreements  or  warranties  between the parties  other than
         those set forth or provided for herein.  This  Agreement may be amended
         only in writing through an instrument signed by all the parties hereto.

8.6      Confidentiality

         The parties  shall keep the terms of this  Agreement  confidential  and
         shall not disclose it to any third  parties,  except that the Purchaser
         may disclose this Agreement to Union Bank of Switzerland.

8.7      Governing Law and Jurisdiction

         This Agreement shall be governed by Swiss law.  Disputes arising out of
         or in  connection  with  this  Agreement  shall  be  submitted  to  the
         jurisdiction  of the  ordinary  courts of the Canton of  Zurich,  venue
         being  Zurich.  The  Purchaser  reserves the right to take legal action
         against  the  Seller  or the  Company  at their  respective  registered
         offices or at any other competent lace of jurisdiction.


                                                          20

<PAGE>



Place and Date:  Zurich, 17-1-97

Unilabs SA                     Unilabs Management Co. Ltd.


EIBA "Eidgenossische Bank"
Beteiligungs- und Finanzgesellschaft



                                LIST OF EXHIBITS:



Exhibit                    1:   Ownership   Structure  of  Unilabs  SA  and  its
                           operating subsidiaries (Section 4 (a) )
                                                                             UL


Exhibit 1a:                Proposal for Capital Restructuring of Unilabs SA
                           (Section 4(b) )
                                                                             UL


Exhibit                    2: List of assets not owned by the  company or by its
                           subsidiaries  or assets  which are not free and clear
                           of  liens,  charges,  security  interests  and  other
                           encumbrances (section 4 (e) )
                                                                              UL


Exhibit 3:                 List of material adverse changes since the last
                           balance sheet date of May 31, 1996 (Section 4 (j))
                                                                             UL


Exhibit                    4: List of information  technology  rights  currently
                           used by  Unilabs SA and its  subsidiaries  (Section 4
                           (o) )
                                                                             UL


Exhibit                    5:  List  of  all  intercompany  transactions  and of
                           transactions  between  Group  companies  and  related
                           parties (Section 4 (r) )
                                                                             UL


UL:      Unilabs
L&S:     Lenz & Staehelin

                                                          21







                                  EXHIBIT (2-2)










                            SHARE PURCHASE AGREEMENT



                                     BETWEEN



                  Unilabs Group Limited, British Virgin Islands

                                       and

                  Unilabs Management Company Limited, Gibraltar



                                   as Sellers



                                       AND



                      Cantonal Bank of Geneva, Switzerland

                                  as Purchaser



                   Relating to 5% of the Shares in Unilabs SA



                                                          22

<PAGE>



This Share  Purchase  Agreement was entered into on February 6, 1997 between the
following parties:


1.       Unilabs Group Limited, British Virgin Islands

         (hereinafter referred to as "UGL")

                                       and

         Unilabs Management Company Limited, Gibraltar

         (hereinafter referred to as "UMC")


                                                              of the first part

                                       and

2.       Cantonal Bank of Geneva, Switzerland

         (hereinafter referred to as "Purchaser")

                                                              of the other part



Introduction

UGL is the  majority  shareholder  of  Unilabs  SA,  a  Swiss  corporation  (the
"Company"),  currently holding 79% of the Company's issued and outstanding share
capital.

UMC is a  wholly-owned  subsidiary  of the Company  currently  holding 5% of the
Company's issued and outstanding share capital.

The  Company  intends to do an initial  public  offering  ("IPO") by listing its
shares on the Swiss Stock  Exchange.  For  purposes of  preparing  the IPO,  the
Purchaser is prepared to buy an equity interest in the Company.

The  Company  accepts  that  the  Purchaser  will  have  the  right  but not the
obligation to act as co-lead  manager in the IPO,  subject to agreement of Union
Bank of Switzerland, the designated leadmanager.

Based on the foregoing, the Parties agree as follows:



                                                          23

<PAGE>



1.       Sale and Purchase of Shares

         UMC agrees to sell to the  Purchaser  and the  Purchaser  agrees to buy
         from UMC 800 bearer shares of the Company with a nominal value of Sfrs.
         500.--  each,  representing  5.0%  of  the  total  of  the  issued  and
         outstanding share capital of the Company.

         The 800 shares to be sold to the Purchaser are hereinafter
         referred to as the "Shares."


2.       Purchase Price

         The purchase price for the Shares shall be Sfrs. [Confidential Portion]
         per share,  representing Sfrs.  [Confidential Portion] in the aggregate
         (the  "Purchase  Price").  The  Purchase  Price shall be payable at the
         Closing (as defined  under  Section 3.1 below) by wire  transfer to the
         account to be designated by UMC and against delivery of the Shares.


3.       Closing

3.1      Closing Date of Transaction

         The sale and purchase of the Shares shall be consummated at the offices
         of the  Purchaser  or at such other place as the Parties may agree,  on
         February 6, 1997 (the "Closing Date").

3.2      Conditions Precedent

         The  sale and  purchase  of the  Shares  contemplated  herein  shall be
         subject to the following  conditions being met on or before February 6,
         1997:

         a)       Approval:  Approval of the purchase of the Shares by the
                  General Management of the Purchaser.

         b)       Board Approvals:  Approval of the purchase of the Shares
                  by the boards of directors of UGL and UMC.


4.       Representations and Warranties of Seller and Company

         UGL and  UMC  hereby  represent  and  warrant  to the  Purchaser,  such
         representations  and  warranties  to be true as of the  signing of this
         Agreement and at Closing, the following:

         a)       Legal Existence:  The Company and each of its
                  subsidiaries listed in Exhibit 1 (the "Subsidiaries") is
                  a corporation duly incorporated and validly existing
                  under the laws of the jurisdiction in which it is
                  incorporated, capable of being sued in its own right.

                                                          24

<PAGE>



                  The Company has the power to own its  property  and assets and
                  the authority to carry on its business as currently conducted.

         b)       Ownership Structure:  The Company has a share capital of
                  Sfrs. 8'000'000.--, divided into 16'000 shares with a
                  nominal value of Sfrs. 500.-- each.  No further capital,
                  non-voting stock, convertible securities or similar
                  rights in the Company have been or will by the Closing be
                  created or issued or agreed to be issued.  The Shares
                  have been validly issued and fully paid-up.

                  Notwithstanding   the  foregoing,   a  restructuring   of  the
                  Company's  share capital is currently  contemplated in view of
                  the IPO which will result in (i) a split of the nominal  value
                  of the bearer shares from Sfrs. 500.-- to Sfrs. 40.-- and (ii)
                  the  creation  of a new  class of  registered  shares of Sfrs.
                  20.--  nominal  value which will  represent 30% of the capital
                  and  approximately  47% of the voting  rights.  The registered
                  shares will be reserved to UGL, and the Purchaser will receive
                  only bearer shares after the restructuring.  This proposal for
                  the Company's  new dual capital  structure is shown in Exhibit
                  2.

         c)       Ownership:  The Seller is the sole legal and beneficial
                  owner of the Shares, free and clear of all liens,
                  encumbrances, options, charges and other claims arising
                  from any privilege, pledge or security arrangement.  The
                  Seller has full right and capacity to transfer and sell
                  the Shares.

                  Upon delivery of the Shares,  the Purchaser  will receive good
                  and valid  title to the  Shares,  free and clear of all liens,
                  encumbrances or other rights of third parties.

                  On the Closing date,  the  ownership  structure of the Company
                  will be as follows:

                                                                    % of capital
                           Unilabs Group Ltd.:                             79.0%
                           Unilabs Holding SA, Panama:                     10.0%
                           EIBA:                                            5.0%
                           Cantonal Bank of Geneva:                         5.0%
                           Unilabs Management Company Ltd.:                   -
                           Third Party:                                     1.0%

                  The Purchaser is aware that UGL is  negotiating  with KK Trust
                  AG the sale to KK Trust AG of  another 5% of shares of Unilabs
                  SA, which it expects to complete by the end of February 1997.

         d)       Annual Accounts:  The latest consolidated annual accounts
                  as per May 31, 1996 of the Company (as delivered to the
                  Purchaser) fairly represent the consolidated financial

                                                          25

<PAGE>



                  situation  of the  Company as per the  balance  sheet date and
                  have been  prepared  in  compliance  with  generally  accepted
                  accounting  principles  as applied  in the  United  States (US
                  GAAP).

         e)       Assets:  Except as disclosed in Exhibit 3, the Company
                  ------                          ---------
                  and each of the Subsidiaries owns all real property,  personal
                  property and other assets, tangible and intangible,  reflected
                  in the  latest  annual  balance  sheet of the  Company  or the
                  relevant  Subsidiary,  free and clear of all  liens,  charges,
                  security interests and other incumbrances. There are no assets
                  which are used in the  conduct of the  business of the Company
                  or any of its  Subsidiaries  which  are not  reflected  in the
                  latest  annual  balance  sheet of the Company or the  relevant
                  Subsidiary.

         f)       Accounts Receivable:  The accounts receivable reflected in the
                  latest annual  accounts of the Company and of each  Subsidiary
                  are fully  collectible  within 90 days and, to the extent they
                  are not fully  collectible,  whether or not within a period of
                  90 days,  the Company or the relevant  Subsidiary  has created
                  provisions sufficient to cover any shortfall.

         g)       No Undisclosed Liabilities:  Except as disclosed in
                  Exhibit 4, none of the Company and the Subsidiaries have
                  any liabilities or obligations of any nature (absolute,
                  accrued, contingent or otherwise), which are not fully
                  reflected or reserved against in the latest annual
                  accounts of the Company or the relevant Subsidiary.

         h)       Books and Records:  The Company and each Subsidiary is in
                  possession and has accurately kept all accounts, books,
                  letters, financial and other records as required by
                  applicable law.

         i)       Taxes:  The Company and each Subsidiary has timely filed
                  all tax returns for income tax, withholding taxes, stamp
                  taxes, sales taxes, social security taxes and all other
                  taxes of every kind whatsoever required by law to be
                  filed and all such tax returns are complete and accurate.

                  The Company and each  Subsidiary has paid all taxes which have
                  become due and there is no further liability for any taxes and
                  no  interests or  penalties  accrued or accruing  with respect
                  thereto which would exceed the provisions  created in the last
                  balance  sheet  of  the  Company  or the  relevant  Subsidiary
                  specifically for such liabilities, interests or penalties.

         j)       No Material Adverse Change:  Except as disclosed in
                  Exhibit 5 attached hereto, since the last balance sheet
                  date of May 31, 1996, the financial situation
                  (consolidated and non-consolidated) of the Company or its

                                                          26

<PAGE>



                  business has not been affected by any material adverse
                  change.

         k)       Permits and Authorizations:  The Company and each
                  Subsidiary has all the permits and authorizations which
                  are necessary to carry on its business and neither the
                  execution of this Agreement nor the consummation of the
                  transaction contemplated herein will affect the
                  effectiveness of such permits and authorizations.

         l)       Compliance with Applicable Laws:  In conducting its
                  -------------------------------
                  business  as  currently   conducted,   the  Company  and  each
                  Subsidiary  is  in  compliance   with  all  applicable   laws,
                  statutes,  orders,  rules and regulations of any  governmental
                  authority.  Without  limiting the generality of the foregoing,
                  the  Company and each  Subsidiary  is in  compliance  with all
                  environmental laws, regulations, orders and decrees applicable
                  to it.

         m)       Insurance:  The insurance policies of the Company and of
                  each Subsidiary adequately cover the risks associated
                  with the business of the Company and the relevant
                  Subsidiary.

         n)       Intellectual Property Rights:  The Company and each
                  ----------------------------
                  Subsidiary   owns  all  the  knowhow,   patents,   trademarks,
                  copyrights and other  intellectual  property  rights,  if any,
                  which are necessary for or used in the conduct of its business
                  as it is now being  conducted or has adequate  license to such
                  rights. None of such patents, trademarks,  copyrights or other
                  intellectual  property  rights violate the rights of any third
                  party.

         o)       Information Technology:  The Company and each Subsidiary
                  has the rights to the information technology necessary to
                  conduct the business as currently conducted and such
                  rights will continue to be effective at least until
                  December 31, 1998.  Exhibit 6 contains a complete list of
                  information technology rights (licences, source codes,
                  etc.) currently used by the Company and the Subsidiaries.

         p)       No Litigation:  No litigation, arbitration,
                  -------------
                  administrative  proceedings  (including  tax  proceedings)  or
                  governmental or regulatory  investigations  are pending or, to
                  the best of the  Company's or Seller's  knowledge,  threatened
                  against  the  Company  or  any  Subsidiary  and  there  are no
                  judgments or decisions which could  jeopardize the conclusion,
                  performance or enforceability of this Agreement or which could
                  otherwise adversely affect this Agreement.

         q)       Group Structure:  The group structure shown in Exhibit 1
                  is complete and accurate; except with respect to Vivagen
                  Diagnostics AG and SQ-Lab Aerztelabor AG, the share

                                                          27

<PAGE>



                  capital of each group company is fully paid-in.

         r)       Intercompany Dealings:  Except as disclosed to the
                  Purchaser in Exhibit 7, all intercompany dealings between
                  companies of the group shown in Exhibit 1 or between
                  group companies and related parties have been made at
                  market conditions (arm's length).

         s)       Full Disclosure:  The information and material provided
                  ---------------
                  by the  Company  to the  Purchaser  for  purposes  of the  due
                  diligence  audit  (legal,  financial and business) is complete
                  and accurate in every material  respect and no information has
                  been withheld from the Purchaser which would have affected its
                  decision to enter into this  Agreement.  Without  limiting the
                  generality  of the  foregoing,  there  are no oral or  written
                  agreements  that have not been  disclosed to the Purchaser and
                  which could affect the present or future  ownership  structure
                  of the Company.


5.       Remedies

5.1      Term of Representations and Warranties

         The  representations  and  warranties  set  forth in  Section 4 of this
         Agreement  shall  continue to be in effect  until  December  31,  1997.
         Notice of claims may be given by the  Purchaser  in  writing  until and
         including December 31, 1997.

         The Purchaser is not bound by any  examination  or notice  requirements
         otherwise  applicable  under Swiss law, except that upon discovery of a
         claim notice  shall be given by the  Purchaser to the Seller as soon as
         reasonably practicable,  subject to the overall limitation provided for
         in the preceding paragraph.

5.2      Remedies

         In case of a breach of a representation  and warranty by UGL, UGL shall
         be liable to indemnify the Purchaser against all losses suffered by the
         Purchaser  as a result  of any such  misrepresentations  or  breach  of
         warranty  or  covenant.  In case of a  breach  of  representations  and
         warranties,  the losses are calculated based on the difference  between
         the actual net asset value of the Company, on a consolidated basis, and
         the  consolidated  net  asset  value of the  Company  had the  relevant
         representation and warranty been accurate.

5.3      Limitation

         No  claims  may be  raised  by the  Purchaser  under  Section 5 of this
         Agreement, unless such claims in each single case of breach of warranty
         exceed Sfrs. 50'000.-- and, in the

                                                          28

<PAGE>



         aggregate, reach an amount of Sfrs. 100'000.--.  For the
         avoidance of doubt, if the claim of the Purchaser exceeds in
         the aggregate Sfrs. 100'000.--, the Purchaser is entitled to
         claim from UGL the entire amount and not only the amount in
         excess of Sfrs. 100'000.--.


6.       Sale in IPO

         The Purchaser  shall have the right to sell its shares to the public in
         the event of an IPO.  The sale of the shares in an IPO shall take place
         at the terms and conditions set by all the parties involved in the IPO.
         Such right shall be subordinated to a preference  right granted to EIBA
         pursuant  to a  Shareholders  Agreement  dated  January 17, 1997 by and
         between EIBA, UGL and the Company.

         To enable the  Purchaser  to exercise  its right to sell in an IPO, UGL
         shall  promptly  indicate  to the  Purchaser  in writing  the terms and
         conditions at which the IPO is to take place. Within five business days
         of receipt of such information,  the Purchaser shall notify UGL whether
         or not it wishes to exercise its right at the terms  indicated.  If so,
         the  Purchaser  shall deliver its shares in the Company to the Company,
         or a  party  designated  by the  Company,  against  payment  of the IPO
         placement price.


7.       Puts and Calls

7.1      Call Option of the Seller

         For the period of August 1, 1998 to  December  31, 2001 UGL, or a party
         designated  by UGL,  shall  have the right to  purchase  the  Company's
         shares then held by the Purchaser. The exercise price shall be equal to
         the purchase price paid by the Purchaser pursuant to the Share Purchase
         Agreement   increased  by  15%  per  annum,   compounded  annually  and
         calculated for the period between  payment of the purchase price by the
         Purchaser and exercise of the call option by UGL.

         If UGL  wishes  to  exercise  its  call  option,  it shall  notify  the
         Purchaser in writing  between August 1, 1998 and no later than by 12.00
         noon on December  31,  2001.  If such date is not a date on which banks
         are open for business in Zurich and Geneva,  the exercise  notice shall
         reach the Purchaser by 12.00 noon on the last business day of 2001. The
         sale  shall be  completd  within  10  busines  days of  receipt  of the
         exercise  notice by the Purchaser and shall take place by the Purchaser
         delivering  its shares in the  Company to UGL or its  designee  against
         receipt of the exercise price.  Each party shall bear its own costs and
         expenses  incurred in connection  with the exercise of the call option,
         except that UGL will pay all stamp  duties  related to the  exercise of
         the call option.

                                                          29

<PAGE>



7.2      Put Option for the Purchaser

         For the  period  of  February  1,  2000  until  December  31,  2001 the
         Purchaser  shall  have the right to sell its  shares in the  Company to
         UGL.

         The  exercise  price for the put option  shall be equal to the purchase
         price paid by the Purchaser  pursuant to the Share Purchase  Agreement,
         increased by 12% per annum,  compounded annually and calculated for the
         period  between the date of purchase by the  Purchaser  and the date of
         exercise of the put option by the Purchaser.

         If the Purchaser  wishes to exercise its put option it shall notify UGL
         in  writing,  indicating  that  it  exercises  its put  option  and the
         exercise price.  The sale shall be completed within 10 business days of
         receipt  of the  exercise  notice  by UGL and shall  take  place by the
         Purchaser  delivering its shares in the Company  against receipt of the
         exercise  price.  Each  party  shall  bear its own costs  and  expenses
         incurred in  connection  with the exercise of the call  option,  except
         that UGL will pay all stamp  duties  related to the exercise of the put
         option.

7.3      Subordination of Put

         The Purchaser hereby expressly  acknowledges that any claim it may have
         against UGL pursuant to Section 7.2 above will be  subordinated  to any
         claim made by EIBA  against  UGL in  connection  with EIBA's put option
         pursuant to its Shareholders Agreement dated January 17, 1997.



7.4      Expiration of Puts and Calls

         It is agreed that both the call  option of UGL  pursuant to Section 7.1
         above and the put option of the Purchaser pursuant to Section 7.2 above
         shall cease to be valid if an IPO of the Company occurs.


8.       Miscellaneous

8.1      Costs and Expenses

         All costs and expenses incurred by the Purchaser in connection with the
         preparation,  negotiation,  execution and performance of this Agreement
         shall be borne by the  Purchaser,  including  legal  fees.  UGL and UMC
         shall bear their own costs and expenses.

8.2      Taxes


                                                          30

<PAGE>



         Each party shall bear all taxes or other  charges  which  become due by
         itself  in  connection  with  the  execution  or  performance  of  this
         Agreement,  such as  securities  transfer  tax,  except with respect to
         stamp duties to the extent provided under Sections 7.1 and 7.2.

8.3      Access to Information

         UGL will procure that the Company grant the  Purchaser  full access to,
         and  provide  it with,  all  information  and  material  regarding  the
         ownership   structure   and  the   business  of  the  Company  and  its
         subsidiaries which the Purchaser may reasonably request. In particular,
         the Seller shall keep the  Purchaser  duly informed of the IPO process.
         This right of  information  is in  addition to the  statutory  right of
         information  of the  Purchaser as a  shareholder  of the  Company.  The
         Purchaser  undertakes to keep such information  confidential and not to
         disclose it to any third party.

8.4.     Transfer Restrictions

         For the term of this  Agreement,  UGL shall not be  permitted  to sell,
         assign or otherwise transfer its controlling  shareholding  interest in
         the Company without the prior written consent of the Purchaser.  In the
         event the transfer to UGL's  controlling  interest in the Company is to
         be made to another  company  within the same  group of  companies,  the
         Purchaser  and  its   affiliated  and  related   companies   (including
         investment  funds  managed  by the  Purchaser)  will  not  unreasonably
         withhold such consent,  provided the  transferee  agrees to be bound by
         the terms of this Agreement.

8.5      Notices

         Communications under this Agreement shall be made in writing by letter,
         telex or telefax and addressed as follows:

         if to the Purchaser:

         Banque Cantonale de Geneve
         Mr. Jean Buhler
         Quai de I'lle 17
         1204 Geneva
         Tel.: 41-22-317.27.27
         Fax:  41-22-311.81.71

         if to UGL and/or UMC:

         Unilabs SA
         Mr. Eric Wavre
         12, place Cornavin
         1201 Geneva
         Tel.: +41-22-909-7777
         Fax:  +41-22-909-7707

                                                          31

<PAGE>



8.6      Entire Agreement

         This Agreement embodies the entire agreement between the parties hereto
         with respect to the transaction contemplated herein and there have been
         and are no  agreements  or  warranties  between the parties  other than
         those set forth or provided for herein.  This  Agreement may be amended
         only in writing through an instrument signed by all the parties hereto.

8.7      Confidentiality

         The parties  shall keep the terms of this  Agreement  confidential  and
         shall not disclose it to any third parties.

8.8      Governing Law and Jurisdiction

         This Agrement shall be governed by Swiss law.  Disputes  arising out of
         or in  connection  with  this  Agreement  shall  be  submitted  to  the
         jurisdiction  of the  ordinary  courts of the Canton of  Geneva,  venue
         being  Geneva.  The  Purchaser  reserves the right to take legal action
         against  UGL  or UMC  at  their  registered  offices  or at  any  other
         competent place of jurisdiction.

                                                          32

<PAGE>



Place and Date:
Geneva, February 6, 1997






- -------------------------------                  ------------------------------
Unilabs Management Company                       Unilabs Group Limited




- -------------------------------
Cantonal Bank of Geneva

                                                          33

<PAGE>



                                List of Exhibits


Exhibit 1:                 Structure of the Unilabs SA group

Exhibit 2:                 Proposal for Unilabs SA's new dual capital structure

Exhibit 3:                 List of assets not owned or not free and clear

Exhibit 4:                 List of interest bearing debts and contingent
                           liabilities

Exhibit 5:                 Material adverse change

Exhibit 6:                 List of information technology rights

Exhibit 7:                 List of intercompany transactions and transactions
                           with related parties


                                                          34








                                  EXHIBIT (2-3)









                            SHARE PURCHASE AGREEMENT




                                     BETWEEN



                  Unilabs Group Limited, British Virgin Islands



                Uniholding Corporation, United States of America



                            Unilabs S.A., Switzerland



                                       AND



                            KK Trust AG, Switzerland



                   Relating to 5% of the Shares of Unilabs SA










                                                          35

<PAGE>





This Share Purchase  Agreement was entered into on February 17, 1997 between the
following parties:

1.       Unilabs Group Limited,           Road Town, Pasea Estate, P.O. Box
                                          3149, Tortola, British Virgin Islands

         (hereinafter referred to as "UGL")

                                                              of the first part

2.       UniHolding Corporation,          Delaware with its principal business
                                          address at 96 Spring Street, New
                                          York, N.Y. 10012, United States of
                                          America

(hereinafter referred to as "UHLD")

                                                             of the second part

3.       Unilabs SA,                     53, Avenue Blanc, 1202 Geneva,
                                         Switzerland

(hereinafter referred to as "the Company")

                                                              of the third part


                                       and

4.       KK Trust AG, Switzerland                    Grabenstrasse 32, 6301 Zug,
                                                     Switzerland

(hereinafter referred to as "Purchaser")

                                                             of the fourth part


Introduction

UGL is the  majority  shareholder  of  Unilabs  SA,  a  Swiss  corporation  (the
"Company"),  currently holding 79% of the Company's issued and outstanding share
capital.

UHLD is the sole shareholder of UGL.

The  Company  intends to do an initial  public  offering  ("IPO") by listing its
shares on the Swiss Stock  Exchange.  For  purposes of  preparing  the IPO,  the
Purchaser is prepared to buy an equity interest in the Company.




                                                          36

<PAGE>



Based on the foregoing, the Parties agree as follows:

1.       Sale and Purchase of Shares

         UGL agrees to sell to the  Purchaser  and the  Purchaser  agrees to buy
         from UGL 800 bearer shares of the Company with a nominal value of Sfrs.
         500.-- each, representing 5% of the total of the issued and outstanding
         share capital of the Company.

         The 800 shares to be sold to the Purchaser are hereinafter  referred to
         as the "Shares".


2.       Purchase Price

         The purchase price for the Shares shall be Sfrs. [Confidential Portion]
         per share,  representing Sfrs.  [Confidential Portion] in the aggregate
         (the  "Purchase  Price").  The  Purchase  Price shall be payable at the
         Closing (as defined  under  Section 3.1 below) by wire  transfer to the
         account to be designated by UGL and against delivery of the Shares.

3.       Closing

3.1      Closing

         The sale and purchase of the Shares shall be consummated at the offices
         of Bar und Karrer, Seefeldstrasse 19, in Zurich, or at such other place
         as the  Parties  may agree,  no later than 3 days after the  conditions
         precedent  set forth in Section  3.2 below have been met (the  "Closing
         Date").  At the Closing the Purchaser shall execute by wire transfer to
         the account to be designated by UGL the Purchase Price against delivery
         of the Shares.

3.2      Conditions Precedent

         The  sale and  purchase  of the  Shares  contemplated  herein  shall be
         subject to the  following  conditions  being met on or before  February
         17th, 1997:

         a)       Sale  to  EIBA:  Confirmation  by UGL to  the  Purchaser  that
                  Eidgenossische   Bank  Beteiligungs-  und   Finanzgesellschaft
                  (hereinafter  "EIB") has on January  17,  1997  signed a Share
                  Purchase  Agreement  pursuant to which EIBA has acquired 5% of
                  the share capital of the Company.

         b)       Board Approval: Approval of the purchase of the Shares by
                  the board of directors of the Purchaser.



         c)       Board Approvals: Approval of the purchase of the Shares

                                                          37

<PAGE>



                  by the boards of directors of UGL, the Company and UHLD.

         d)       EIBA Approval:             Approval of EIBA of this Agreement.

4.       Representations and Warranties of Seller and Company

         UGL,  the  Company and UHLD hereby  represent  and warrant  jointly and
         severally to the Purchaser,  such  representations and warranties to be
         true as of the signing of this Agreement and at Closing, the following:

         a)       Legal Existence:                   The Company and each of its
                  ---------------
                  subsidiaries listed in Exhibit 1 (the "Subsidiaries") is
                                         ---------
                  a corporation duly incorporated and validly existing under the
                  laws of the jurisdiction in which it is incorporated,  capable
                  of being sued in its own right.  The  Company has the power to
                  own its property and assets and the  authority to carry on its
                  business as currently conducted.

         b)       Ownership Structure:  The Company has a share capital of
                  Sfrs. 8,000,000.--, divided into 16,000 shares with a
                  nominal value of Sfrs. 500.-- each.  No further capital,
                  non-voting stock, convertible securities or similar
                  rights in the Company have been or will by the Closing be
                  created or issued or agreed to be issued.  The Shares
                  have been validly issued and fully paid-up.

                  Notwithstanding   the  foregoing,   a  restructuring   of  the
                  Company's  share capital is currently  contemplated in view of
                  the IPO which will result in (i) a split of the nominal  value
                  of the bearer shares from Sfrs.  500.-- to Sfrs 40.-- and (ii)
                  the creation of a new class of registered shares of Sfrs 20.--
                  nominal  value  which will  represent  30% of the  capital and
                  approximately 47% of the voting rights.  The registered shares
                  will be reserved to UGL and the  Purchaser  will  receive only
                  bearer shares after the  restructuring.  This proposal for the
                  Company's new dual capital structure is shown in Exhibit 2.

         c)       Ownership.  The Seller is the sole legal and beneficial
                  owner of the Shares, free and clear of all liens,
                  encumbrances, options, charges and other claims arising
                  from any privilege, pledge or security arrangement.  The
                  Seller has full right and capacity to transfer and sell
                  the Shares.

                  Upon delivery of the Shares,  the Purchaser  will receive good
                  and valid  title to the  Shares,  free and clear of all liens,
                  encumbrances or other rights of third parties.  On the Closing
                  Date,  the  ownership  structure  of the  Company  will  be as
                  follows:



                                                          38

<PAGE>



                                                                   % of capital

                           Unilabs Group Ltd.:                            74.0%
                           Unilabs Holding SA, Panama:                    10.0%
                           EIBA:                                           5.0%
                           KK Trust AG:                                    5.0%
                           Banque Cantonale de Geneve.:                    5.0%
                           Third Party                                     1.0%


         d)       Annual Accounts:  The latest  consolidated  annual accounts as
                  per  May  31,  1996  of  the  Company  (as  delivered  to  the
                  Purchaser)   fairly  represent  the   consolidated   financial
                  situation  of the  Company as per the  balance  sheet date and
                  have been  prepared  in  compliance  with  generally  accepted
                  accounting  principles  as applied  in the  United  States (US
                  GAAP).

         e)       Assets:  Except as disclosed in Exhibit 3, the Company
                  ------                          ---------
                  and each of the Subsidiaries owns all real property,  personal
                  property and other assets, tangible and intangible,  reflected
                  in the  latest  annual  balance  sheet of the  Company  or the
                  relevant  subsidiary,  free and clear of all  liens,  charges,
                  security interest and other encumbrances.  There are no assets
                  which are used in the  conduct of the  business of the Company
                  or any of its  Subsidiaries  which  are not  reflected  in the
                  latest  annual  balance  sheet of the Company or the  relevant
                  Subsidiary.

         f)       Accounts Receivable:  The accounts receivable reflected in the
                  latest annual  accounts of the Company and of each  Subsidiary
                  are fully  collectible  within 90 days and, to the extent they
                  are not fully  collectible,  whether or not within a period of
                  90 days,  the Company or the relevant  Subsidiary  has created
                  provisions sufficient to cover any shortfall.

         g)       No Undisclosed Liabilities:  Except as disclosed in
                  Exhibit 4, none of the Company and the Subsidiaries have
                  any liabilities or obligations of any nature (absolute,
                  accrued, contingent or otherwise), which are not fully
                  reflected or reserved against in the latest annual
                  accounts of the Company or the relevant Subsidiary.

         h)       Books and Records:  The Company and each Subsidiary is in
                  possession and has accurately kept all accounts, books,
                  letters, financial and other records as required by
                  applicable law.

         i)       Taxes:  The Company and each Subsidiary has timely filed
                  all tax returns for income tax, withholding taxes, stamp
                  taxes, sales taxes, social security taxes and all other
                  taxes of every kind whatsoever required by law to be
                  filed and all such tax returns are complete and accurate.

                                                          39

<PAGE>



                  The Company and each  Subsidiary has paid all taxes which have
                  become due and there is no further liability for any taxes and
                  no  interests or  penalties  accrued or accruing  with respect
                  thereto which would exceed the provisions  created in the last
                  balance  sheet  of  the  Company  or the  relevant  Subsidiary
                  specifically for such liabilities, interests or penalties.

         j)       No Material Adverse Change:  Except as disclosed in
                  Exhibit 5, attached hereto, since the last balance sheet
                  date of May 31, 1996, the financial situation
                  (consolidated and non-consolidated) of the Company or its
                  business has not been affected by any material adverse
                  change.

         k)       Permits and Authorizations:  The Company and each
                  Subsidiary has all the permits and authorizations which
                  are necessary to carry on its business and neither the
                  execution of this Agreement nor the consummation of the
                  transaction contemplated herein will affect the
                  effectiveness of such permits and authorizations.

         l)       Compliance with Applicable Laws:  In conducting its
                  business  as  currently   conducted,   the  Company  and  each
                  Subsidiary  is  in  compliance   with  all  applicable   laws,
                  statutes,  orders,  rules and regulations of any  governmental
                  authority.  Without  limiting the generality of the foregoing,
                  the  Company and each  Subsidiary  is in  compliance  with all
                  environmental laws, regulations, orders and decrees applicable
                  to it.

         m)       Insurance:  The insurance policies of the Company and of
                  each Subsidiary adequately cover the risks associated
                  with the business of the Company and the relevant
                  Subsidiary.

         n)       Intellectual Property Rights:  The Company and each
                  Subsidiary   owns  all  the  knowhow,   patents,   trademarks,
                  copyrights and other  intellectual  property  rights,  if any,
                  which are necessary for or used in the conduct of its business
                  as it is now being  conducted or has adequate  license to such
                  rights. None of such patents, trademarks,  copyrights or other
                  intellectual  property  rights violate the rights of any third
                  party.



         o)       Information Technology:  The Company and each Subsidiary
                  has the rights to the information technology necessary to
                  conduct the business as currently conducted and such
                  rights will continue to be effective at least until
                  December 31, 1998.  Exhibit 6 contains a complete list of
                  information technology rights (licenses, source codes,
                  etc.) currently used by the Company and the Subsidiaries.

                                                          40

<PAGE>



         p)       No Litigation:  No litigation, arbitration,
                  administrative  proceedings  (including  tax  proceedings)  or
                  governmental or regulatory  investigations  are pending or, to
                  the best of the  Company's or Seller's  knowledge,  threatened
                  against  the  Company  or  any  Subsidiary  and  there  are no
                  judgments or decisions which could  jeopardize the conclusion,
                  performance or enforceability of this Agreement or which could
                  otherwise adversely affect this Agreement.

         q)       Group Structure:  The group structure shown in Exhibit 1
                  is complete and accurate; except with respect to Vivagen
                  Diagnostics AG and SQ-Lab Aerztelabor AG, the share
                  capital of each group company is fully paid-in.

         r)       Intercompany Dealings:  Except as disclosed to the
                  Purchaser in Exhibit 7, all intercompany dealings between
                  companies of the group shown in Exhibit 1 or between
                  group companies and related parties have been made at
                  market conditions (arm's length).

         s)       Full Disclosure:         The information and material provided
                  by the company to the  Purchaser  is complete  and accurate in
                  every material  respect and no  information  has been withheld
                  from the  Purchaser  which would have affected its decision to
                  enter into this Agreement.  Without limiting the generality of
                  the foregoing,  there are no oral or written  agreements  that
                  have not been  disclosed  to the  Purchaser  and  which  could
                  affect  the  present  or  future  ownership  structure  of the
                  Company.

5.       Remedies

5.1      Term of Representations and Warranties

         The  representations  and  warranties  set  forth in  Section 4 of this
         Agreement  shall  continue to be in effect until  February  1st,  2000.
         Notice of claims may be given by the  Purchaser  in  writing  until and
         including February 1st, 2000.

         The Purchaser is not bound by any  examination  or notice  requirements
         otherwise  applicable  under Swiss law, except that upon discovery of a
         claim notice  shall be given by the  Purchaser to the Seller as soon as
         reasonably practicable,  subject to the overall limitation provided for
         in the preceding paragraph.

5.2      Remedies

         In case of a breach of a  representation  and warranty UGL, the Company
         and UHLD  shall be  jointly  and  severally  liable  to  indemnify  the
         Purchaser  against all losses  suffered by the Purchaser as a result of
         any such  misrepresentations or breach of warranty or covenant. In case
         of a breach of

                                                          41

<PAGE>



         representations and warranties,  the losses are calculated based on the
         difference  between  the actual net asset  value of the  Company,  on a
         consolidated basis, and the consolidated net asset value of the Company
         had the relevant representation and warranty been accurate.

         Recession  of  this  agreement  and  unwinding  of the  transaction  in
         accordance with "Article 208 du Code des Obligations" are excluded.

5.3      Limitation

         No claims may be raised by the Purchaser under Section 5 of
         this Agreement, unless such claims in each single case of
         breach of warranty exceed Sfrs. 50'000.-- and, in the
         aggregate, reach an amount of Sfrs. 100'000.--.  For the
         avoidance of doubt, if the claim of the Purchaser exceeds in
         the aggregate Sfrs. 100'000.--, the Purchaser is entitled to
         claim the entire amount and not only the amount in excess of
         Sfrs. 100'000.--.

6.       Sale in and after IPO

         The Purchaser  shall have the right to sell any or all of its shares to
         the  public in the event of an IPO as from the first day of  trading on
         the Swiss  Exchange.  The sale of the shares in an IPO shall take place
         at the terms and conditions set by all the parties involved in the IPO.
         Such right shall be subordinated to a preference  right granted to EIBA
         pursuant  to a  Shareholders  Agreement  dated  January 17, 1997 by and
         between EIBA, UGL and the Company.

         To enable the  Purchaser  to exercise  its right to sell in an IPO, UGL
         shall  promptly  indicate  to the  Purchaser  in writing  the terms and
         conditions at which the IPO is to take place. Within five business days
         of receipt of such information,  the Purchaser shall notify UGL whether
         or not it wishes to exercise its right at the terms  indicated.  If so,
         the  Purchaser  shall deliver its shares in the Company to the Company,
         or a  party  designated  by the  Company,  against  payment  of the IPO
         placement price.



7.       Puts and Calls

7.1      Call Option of the Seller

         For the period of January 1, 1998 to December  31, 2001 UGL, or a party
         designated  by UGL,  shall  have the right to  purchase  the  Company's
         shares then held by the Purchaser. The exercise price shall be equal to
         the purchase price paid by the Purchaser pursuant to the Share Purchase
         Agreement   increased  by  20%  per  annum,   compounded  annually  and
         calculated for the

                                                          42

<PAGE>



         period  between  payment of the  purchase  price by the  Purchaser  and
         exercise of the call option by UGL.

         If UGL  wishes  to  exercise  its  call  option,  it shall  notify  the
         Purchaser  in writing no later than by 12.00 noon on December 31, 2001.
         If such  date is not a date on which  banks  are open for  business  in
         Zurich,  the exercise notice shall reach the Purchaser by 12.00 noon on
         the last  business day of 2001.  The sale shall be completed  within 10
         business  days of receipt of the exercise  notice by the  Purchaser and
         shall take place by the Purchaser  delivering its shares in the Company
         to UGL or its  designee  against  receipt of the exercise  price.  Each
         party shall bear its own costs and expenses incurred in connection with
         the exercise of the call option.

         Notwithstanding  the above, UGL hereby commits not to exercise its call
         option  as long as EIBA's  put  option  against  UGL,  pursuant  to its
         Shareholders Agreement dated January 17, 1997, has not expired.

7.2      Put Option for the Purchaser

         For the period of February  1st,  2000 until  December  31st,  2001, or
         immediately  if UGL breaches  Sec.  8.4, the  Purchaser  shall have the
         right to sell its shares in the Company to one of the following parties
         (in that order of priority):  first,  to UGL,  second,  if UGL fails to
         fulfill its purchase obligation under this Sec. 7.2, within twenty days
         of  notification  by the Purchaser,  to the Company,  and third, if the
         company  fails to fulfill its purchase  obligation  under this Sec. 7.2
         within twenty days of notification by the purchaser, to UHLD.

         The  exercise  price for the put option  shall be equal to the purchase
         price paid by the Purchaser  pursuant to the Share Purchase  Agreement,
         increased by 12% per annum  compounded  annually and calculated for the
         period  between the date of purchase by the  Purchaser  and the date of
         exercise of the put option by the Purchaser.

         If the Purchaser  wishes to exercise its put option it shall notify the
         party concerned in writing, indicating that it exercises its put option
         and the exercise price.  The sale shall be completed within 10 business
         days of receipt of the exercise notice by the party concerned and shall
         take  place by the  Purchaser  delivering  its  shares  in the  Company
         against  receipt of the exercise  price.  Each party shall bear its own
         costs and expenses incurred in connection with the exercise of the call
         option.

7.3      Subordination of Put

         The Purchaser hereby expressly  acknowledges that any claim it may have
         against UGL and/or the Company pursuant to section

                                                          43

<PAGE>



         7.2 above will be  subordinated  to any claim made by EIBA  against UGL
         and/or the Company in connection with EIBA's put option pursuant to its
         Shareholders  Agreement  dated  January 17,  1997,  so that UGL, or the
         Company, as the case may be, shall first perform the put option of EIBA
         before performing the put option of the Purchaser.

         Notwithstanding  the  foregoing,  if EIBA,  does not  exercise  its put
         option  within ten days after having  received  notice of the Purchaser
         that the  Purchaser  exercises  its put option,  UGL or the Company can
         perform the put option of the Purchaser.

7.4      Expiration of Puts and Calls

         It is agreed that both the call  option of UGL  pursuant to Section 7.1
         above and the put option of the Purchaser pursuant to Section 7.2 above
         shall  cease to be valid if an IPO of the  Company  occurs at the first
         day of trading on the Swiss Exchange, provided that at least 35% of the
         Company's shares have been placed with the public.

8.       Miscellaneous

8.1      Cost and Expenses

         Each Party shall pay its own legal fees, costs,  traveling expenses and
         other expenses in connection with this transaction.

8.2      Taxes

         Each party shall bear all taxes or other  charges  which  become due by
         itself  in  connection  with  the  execution  or  performance  of  this
         Agreement, such as securities transfer tax.

8.3      Access to Information

         The company  grants the Purchaser  full access to, and provide it with,
         all information and material regarding the ownership  structure and the
         business of the company and its  subsidiaries  which the  Purchaser may
         reasonably request. In particular,  the Seller shall keep the Purchaser
         duly  informed  of the IPO  process.  This right of  information  is in
         addition to the statutory  right of  information  of the Purchaser as a
         shareholder  of the  Company.  The  Purchaser  undertakes  to keep such
         information  confidential  and not to  disclose  it to any third  party
         unless  required  to do so by  law,  a  recognized  stock  exchange  or
         pursuant to an order of a competent governmental authority or court.

8.4      Transfer Restrictions

         For the term of this  Agreement,  UGL shall not be  permitted  to sell,
         assign or otherwise transfer its controlling

                                                          44

<PAGE>



         shareholding  interest in the Company without the prior written consent
         of the  Purchaser.  In the  event  the  transfer  of UGL's  controlling
         interest  in the  Company is to be made to another  company  within the
         same group of companies,  the Purchaser will not unreasonably  withhold
         such consent,  provided the transferee  agrees to be bound by the terms
         of this Agreement.

8.5      Representation on Company's Board

         In the event EIBA ceases to be represented on the board of the Company,
         the Purchaser  shall have the right to be  represented  on the board of
         directors  of the  Company.  For  this  purpose,  the  Purchaser  shall
         nominate  a  person  who  shall be  elected  by the  Company's  general
         shareholders'  meeting  to  the  Company's  board  of  directors.   UGL
         undertakes  to cast its vote at such general  shareholders'  meeting in
         support of the election of the person nominated by the Purchaser.

8.6      Notices

         Communications under this Agreement shall be made in writing by letter,
         telex or telefax and addressed as follows:

         if to the Purchaser:

         K K Trust AG
         Grabenstrasse 32
         6301 Zug

         Tel.:  +41-711 4161
         Fax :  +41-711 4281

         if to UGL, the Company or UHLD:

         Unilabs SA
         Mr. Eric Wavre
         12, place Cornavin
         1 2 01 Geneva
         Tel:  +41-22-909-7777
         Fax:  +41-22-909-7707

8.7      Entire Agreement

         This Agreement embodies the entire agreement between the parties hereto
         with respect to the transaction contemplated herein and there have been
         and are no  agreements  or  warranties  between the parties  other than
         those set forth or provided for herein.  This  Agreement may be amended
         only in writing through an instrument signed by all the parties hereto.

8.8      Confidentiality

         The Parties  hereto agree and  undertake to keep the terms and contents
         of this Agreement strictly confidential and not to

                                                          45

<PAGE>



         disclose any related  information  to any third party without a written
         consent  of the  other  Parties,  unless  required  to do so by law,  a
         recognized  stock  exchange  or  pursuant  to an order  of a  competent
         governmental  authority of court.  In such an event the Party concerned
         shall inform the other Parties of such disclosure.

8.9      Governing Law and Jurisdiction

         This Agreement shall be governed by Swiss law.  Disputes arising out of
         or in  connection  with  this  Agreement  shall  be  submitted  to  the
         jurisdiction  of the ordinary courts of Canton of Zug, venue being Zug.
         The Purchaser  reserves the right to take legal action against UGL, the
         Company or UHLD at their  registered  offices or at any other competent
         place of jurisdiction.



                                                          46

<PAGE>



         Place and Date:

         ----------------------                       ------------------------
         UNILABS GROUP LTD.                           K K TRUST AG




         ----------------------
         UNILABS SA




         -----------------------
         UNIHOLDING CORPORATION






                                                          47

<PAGE>


                                List of Exhibits



Exhibit 1:                 Structure of the Unilabs SA group.

Exhibit 2:                 Proposal for Unilabs SA's new dual capital
                           structure.

Exhibit 3:                 List of assets not owned or not free and clear

Exhibit 4:                 List of interest bearing debts and contingent
                           liabilities

Exhibit 5:                 Material adverse change

Exhibit 6:                 List of information technology rights

Exhibit 7:                 List of intercompany transactions and transactions
                           with related parties


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