AQUILA BIOPHARMACEUTICALS INC
8-K, 1996-10-31
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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                    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

                                     __________


                                   October 21, 1996
                       Date of Report (Date of earliest event reported)


                       AQUILA BIOPHARMACEUTICALS, INC.
                      (Exact name of registrant as specified in charter)




                Delaware                    0-12081              04-
               (State or other              (Commission File          3307818
              jurisdiction of                  Number)             (IRS
               incorporation)                                       Employer
                                                                 Identification
                                                                 Number)



                                 365 Plantation Street
                            Worcester, Massachusetts  01605
                    (Address of principal executive offices and zip code)

                                    (508) 797-5777
                    (Registrant's telephone number, including area code)

                            Cambridge Biotech Corporation
                 (Former name or former address, if changed since last report)<PAGE>




        ITEM 2.     ACQUISITION OR DISPOSITION OF ASSETS.

        Sale of CBC

              Aquila Biopharmaceuticals, Inc., a Delaware corporation
        ("Aquila"), is a successor to the biopharmaceutical business of
        Cambridge Biotech Corporation, a Delaware corporation ("CBC"),
        pursuant to the terms of a reorganization plan that was confirmed
        by the United States Bankruptcy Court on July 18, 1996 and
        consummated on October 21, 1996 (the "Plan").  (A copy of the
        Plan was filed as Exhibit 2 to the Form 8-K of CBC dated July 18,
        1996.)  As described in the Plan, CBC and Aquila entered into a
        Master Acquisition Agreement (the "Purchase Agreement") dated
        as of April 4, 1996, with bioMerieux Vitek, Inc. ("bioMerieux")
        pursuant to which bioMerieux agreed to purchase all of the
        common stock of CBC for cash of $6,450,000, subject to
        confirmation and consummation of the Plan, and certain other
        conditions.  

              On or about October 21, 1996, CBC's Biopharmaceutical
        Business (as defined in the Plan) was transferred to Aquila, free
        and clear of liens, encumbrances, claims and interests, except as
        otherwise provided in the Plan or Confirmation Order.  Included
        among the assets transferred to Aquila was the Maryland real
        estate on which CBC operates its Retroviral Business (as defined in
        the Plan).  Pursuant to the Plan, Aquila common stock was
        exchanged for CBC common stock and, as a result, CBC became a
        wholly-owned subsidiary of Aquila.  Effective as of October 22,
        1996, Aquila sold all of the issued and outstanding stock of CBC
        to bioMerieux pursuant to the Purchase Agreement for
        $6,450,000.  At the same time bioMerieux entered into a ten year
        lease with Aquila for a portion of the Maryland real estate which
        lease was simultaneously assigned by bioMerieux to CBC.

              At the time of the sale to bioMerieux, CBC's assets
        consisted of the Retroviral Business (as defined in the Plan), which
        includes all assets and business of CBC principally relating to the
        manufacture and sale of diagnostic kits for the diagnosis of
        retroviruses, including those associated with AIDS.  The assets
        include manufacturing operations in Rockville, Maryland,
        inventory, patents, patent applications, and patent rights granted to
        CBC, licenses and sublicenses, trademarks and trademark
        applications and registrations, and certain equipment relating to the
        manufacturing of the retroviral diagnostic products.  In addition,
        pursuant to a modification of the Purchase Agreement, $650,000
        in cash representing a portion of a paid-up license fee was included
        in the assets retained by CBC at the time of the sale.



        ITEM 5.     OTHER EVENTS.

        Adoption of Registration

              Aquila is the successor to CBC pursuant to Rule 12g-3(a)
        under the Securities Exchange Act of 1934 (the "'34 Act").
        Aquila does hereby agree to the deemed registration of its common
        stock, $.01 par value, under the '34 Act pursuant to Rule 12g-3(a)
        thereunder.


        Consummation of the Chapter 11 Reorganization Plan

              The Plan, which was confirmed by the Bankruptcy Court
        on July 18, 1996, was consummated during the week of October
        21, 1996, following the lifting of a judicial stay as more fully
        described below.  The following describes the steps taken to
        consummate the transactions contemplated in the Plan.  All
        capitalized terms used in this Form 8-K which are

                                   -2-<PAGE>




        not defined herein shall have the meanings specified in the Plan,
        except that the common stock of Aquila is herein referred to as
        "Aquila Common Stock" (rather than "New Common Stock") and
        the Common Stock of CBC is referred to as "CBC Common
        Stock" (rather than "Old Common Stock").

        Treatment of Claims and Interests

              Under the terms of the Plan, distributions were made to the
        holders of various claims against and interests in CBC as follows:

        1.    Administrative and Priority Claims (including Class 1)

              Administrative and Priority Claims included fees owed to
        professionals in the Chapter 11 case, payments required to cure
        executory contracts and unexpired leases, allowed priority tax
        claims, and amounts owed in connection with the Postpetition
        Incentive Stock Programs.  

              Since confirmation of the Plan on July 18, 1996, and as
        required by the Plan, CBC and Aquila have paid $1,818,613 on
        account of allowed professional fees and expenses.  Aquila has
        also paid $1,305,663 to cure all defaults under the leases, licenses
        and other executory contracts assumed by CBC or assumed by
        CBC and assigned to Aquila; $88,485 in payment of allowed
        priority tax claims; $22,720 in payment of the cash portion of
        allowed employee incentive stock claims.  Aquila issued 111,790
        shares of Aquila Common Stock (and related Rights) and remitted
        related withholding taxes in the amount of $372,744 in full
        settlement and satisfaction of $1,434,749 in allowed employee
        stock incentive claims.

        2.    Class 2:  Secured Claims

              Effective on October 22, 1996, Aquila delivered to Signet
        Bank its five-year promissory note in the amount of $4.2 million
        in full settlement and satisfaction of Signet's Class 2 claims of
        more than $5 million, and granted to Signet a mortgage lien with
        respect to the Maryland real estate as security.  

        3.    Class 3:  General Unsecured Claims Less Than or Equal to
        $500.

              Class 3 Claims in the amount of $41,703 were paid in cash
        in full.

        4.    Class 4:  General Unsecured Claims Exceeding $500.

              Under the Plan, the holder of a Class 4 claim could elect to
        be treated under either Option A or Option B.  Holders who
        elected Option A received cash equal to 51% of their Allowed
        Class 4 Claims in the aggregate amount of $1,336,561.  Aquila
        has also reserved $92,200 for distribution on account of disputed
        Class 4 claims if, as and when allowed.

              Holders electing Option B received shares of Aquila
        Common Stock with a value, at $9.50 per share, equal to the full
        amount of the holder's Allowed Claim, along with one Right for
        each share.  (A Holder of a Disputed Class 4 Claim that becomes
        an Allowed Class 4 Claim after the Initial Distribution Date does
        not receive any Rights.)  A total of 185,379 shares of Aquila
        Common Stock and Rights were issued to the Disbursing Agent
        for the benefit of the holders of allowed Class 4 claims electing
        Option B, and 10,526 shares of Aquila Common Stock were
        issued as a reserve for distributions on account of disputed Class 4
        claims electing Option B treatment, if, as and when allowed.

                                   -3-<PAGE>




        5.    Class 5:  Securities Class Claims

              Aquila issued 1,250,000 shares of Aquila Common Stock
        and one Right for each such share to the Disbursing Agent for the
        benefit of Class 5 Securities Class Claim beneficiaries in  full
        satisfaction of their $50 million in allowed Class 5 claims.

        6.    Class 6:  CBC Common Stock Interests

              On October 21, 1996, 26,057,006 shares of CBC Common
        Stock (representing 100% of all then issued and outstanding
        shares) held by approximately 3,500 record shareholders were
        deemed transferred to Aquila, in exchange for 3,442,305 shares of
        Aquila Common Stock (and related Rights) which were issued to
        the Disbursing Agent for the benefit of Class 6, the former holders
        of CBC Stock.  

        Formation of Aquila and Restructuring

              Aquila was organized by CBC as a new Delaware
        corporation of which CBC was the sole stockholder on March 7,
        1996.  On October 21, 1996, CBC's Biopharmaceutical Business
        (as defined in the Plan) was transferred to Aquila, free and clear of
        liens, encumbrances, claims and interests, except as otherwise
        provided in the Plan or Confirmation Order.  Included among the
        assets transferred to Aquila was the Maryland real estate on which
        CBC operates its Retroviral Business (as defined in the Plan).

              Effective October 22, 1996, Aquila delivered to
        bioMerieux a stock certificate, representing all of the issued and
        outstanding capital stock in CBC, and bioMerieux delivered to
        Aquila the purchase price; namely $6,450,000 in immediately
        available funds.

              As a result of the consummation of the Plan and the
        assumption by Aquila of the registration of CBC's Common Stock
        under the '34 Act pursuant to Rule 12g-3 thereunder, the
        authorized capital stock of the registrant now consists of
        30,000,000 shares of Common Stock, $.01 par value per share
        ("Aquila Common Stock"), and 5,000,000 shares of Preferred
        Stock, $.01 par value per share ("Aquila Preferred Stock").

        Rights Offering.

              On the Initial Distribution Date, Aquila will commence a
        Rights Offering pursuant to which each share of Aquila Common
        Stock distributed under the Plan (except for any shares distributed
        to Class 4 claims electing Option B that remained disputed as of
        the Consummation Date) will be entitled to exercise a transferable
        right (a "Right") entitling the holder to purchase one Unit, each
        Unit consisting of one share of Aquila Common Stock and one
        warrant to purchase one share of Aquila Common Stock (a
        "Warrant").  In addition, each holder of a Right (or beneficial
        owner in the case of securities held in street name) who has fully
        exercised his right to purchase one Unit for each Right received
        also will have the right to purchase any desired number of Units
        that have not been subscribed for by the holders of other Rights,
        subject to proration if oversubscribed.  The Unit subscription price
        under the Rights will be $9.49.  However, Aquila reserves the
        right to reduce the subscription price for the Units in certain
        circumstances. 

        Status of Ongoing Litigation.

              Four parties appealed from the Bankruptcy Court's July 18,
        1996 order confirming the Plan.  Of these, the appeals taken by
        Alfa Laval Agri AB and Behring Diagnostics, Inc. have either
        been dismissed or are to be dismissed under agreements with CBC
        that have been approved by the Bankruptcy Court.  The appeal by
        Deloitte & Touche, LLP ("Deloitte")

                                   -4-<PAGE>




        remains pending before the United States District Court for the
        District of Massachusetts (No. 96-40192-NMG)(the "District
        Court").  Deloitte contests the right of counsel to Class 5
        Claimants to bring an action against Deloitte on behalf of CBC as
        provided in the Plan.  Finally, an appeal taken by Institut Pasteur
        and Pasteur Sanofi Diagnostics (collectively, "Pasteur") was
        dismissed and the confirmation order affirmed, after hearing, by
        the District Court by order dated September 27, 1996 (No. 96-
        40176-NMG).  Pasteur has since taken a further appeal to the First
        Circuit Court of Appeals, which by order dated October 9, 1996
        denied Pasteur's request for a stay of the confirmation order
        pending appeal.  Pasteur contests the confirmation of the Plan to
        the extent that it provides for CBC's assumption of certain patent
        licenses from Pasteur.  On October 28, 1996, CBC filed a motion
        to dismiss the Pasteur appeal as moot.  Aquila intends to file a
        similar motion in the Deloitte appeal.  Oral argument on Pasteur's
        appeal is scheduled for November 5, 1996.  Aquila believes that
        the likelihood of either of the remaining appeals resulting in the
        unraveling of the Plan, or any part of the Plan, is remote, although
        there can be no assurance that that will not occur.


        ITEM 7.     FINANCIAL STATEMENTS AND EXHIBITS

        (a)   Exhibits:

              4.1*  Form of certificate for Aquila Common Stock

              4.2   Form of certificate for Warrant to Purchase
                    Common Stock (incorporated by reference to
                    Exhibit 2 to Current Report on Form 8-K dated July
                    18, 1996, File No. 0-12081).

              4.3   Form of Certificate for Right to Purchase a Unit
                    (incorporated by reference to Exhibit 2 to Current
                    Report on Form 8-K dated July 18, 1996, File No.
                    0-12081).

              4.4   Rights and Warrants Agreement dated July 29,
                    1996, between Aquila Biopharmaceuticals, Inc. and
                    The First National Bank of Boston (incorporated by
                    reference to Exhibit 2 to Current Report on Form 8-
                    K dated July 18, 1996, File No. 0-12081).

              10    Master Acquisition Agreement, dated as of April 4,
                    1996 (incorporated by reference to Exhibit 10.1 to
                    Quarterly Report on Form 10-Q for quarter ended
                    June 30, 1996, File No. 0-12081).

        (b)   Pro forma Financial Information 

              Pro Forma Consolidated Balance Sheet as of June 30, 1996

              Pro Forma Consolidated Statement of Operations for fiscal
              year end December 31, 1995 

              Pro Forma Consolidated Statement of Operations for six
              month period ending June 30, 1996

              Notes to Pro Forma Financial Statements
                           
        *Filed herewith

                                   -5-<PAGE>







                     AQUILA BIOPHARMACEUTICALS, INC.
          PRO FORMA BALANCE SHEET (UNAUDITED) AS OF JUNE 30, 1996
              PRO FORMA STATEMENTS OF OPERATIONS (UNAUDITED)
                 FOR THE YEAR ENDED DECEMBER 31, 1995 AND
                  FOR THE SIX MONTH PERIOD JUNE 30, 1996

The following unaudited pro forma balance sheet of Aquila Biopharmaceuticals,
Inc. ("Aquila") gives effect to the sale by Aquila of all of the issued and
outstanding shares of Cambridge Biotech Corporation ("CBC") to bioMerieux
Vitek, and to the consummation of CBC's reorganization plan as of June 30,
1996.  Aquila's investment in the retroviral business is shown as a single
investment.  This pro forma balance sheet is not indicative of the actual
financial position had the sale of these assets occurred at June 30, 1996. 

This statement should be read in conjunction with the audited financial
statements of Aquila (previously Cambridge Biotech Corporation) filed with 
the Securities and Exchange Commission (the "SEC") in its annual report on 
Form 10-K for the fiscal year ended December 31, 1995.

The following unaudited pro forma statements of operations of Aquila
give effect to the sale by Aquila of certain assets of its enterics
business to Meridian Diagnostics, Inc. and of all the issued and outstanding
shares of CBC to bioMerieux, Vitek, Inc. immediately prior to the beginning
of the fiscal year ended December 31, 1995 and the six month period ended
June 30, 1996.  The pro forma statement of operations for the year ended
December 31, 1995 presents pro forma adjustments to exclude the revenues,
costs and expenses of both the enterics and retroviral businesses from the
historical CBC results.  The pro forma statement of operations for the six
months ended June 30, 1996 presents pro forma adjustments to exclude results
of the enterics business from Discontinued Operations, where enterics results
for the period had been previously reported, and revenues, costs and expenses
for the retroviral business from the historical CBC results.  
These pro forma statements of operations are not indicative of the results 
which would have occurred if the sale had occurred at the beginning of each 
of the fiscal periods presented or which may occur in the future.  These 
statements should be read in conjunction with the audited financial statements 
of Aquila (previously Cambridge Biotech Corporation) filed with the SEC in
its annual report on Form 10-K for the fiscal year ended December 31, 1995.
- ----------------------------------------------------------------------------
                    AQUILA BIOPHARMACEUTICALS, INC.                     
             Pro Forma Consolidated Balance Sheet 
                           June 30, 1996
                      (Unaudited)(In Thousands)
Assets                                                          Aquila
                           CBC                                  Pro
                        Historical  Retroviral  Consummation    Forma
                        ----------  ----------  ------------    ----- 
Current Assets
   Cash and cash 
   equivalents            $ 13,876   $5,800      ($4,387)     $ 15,289
   Restricted Cash           1,000                               1,000
   Accounts receivable -
    trade (less allowance
    for doubtful accounts)   2,828                               2,828
    Other receivables          131                                 131
    Inventories              4,856   (2,692)                     2,164
    Prepaid expenses and
     other current assets      455                                 455
                             -----    -----       ------         -----
     Total current assets   23,146    3,108       (4,387)       21,867

Investments                    300                                 300

Property,Plant, and                         
  Equipment, Net             5,613     (325)                     5,288

Patents and Purchased
  Technology, Net              502     (167)                       335

Other Assets                   105                                 105
                             -----    -----        -----        ------
Total Assets               $29,666   $2,616      ($4,387)      $27,895
                            ======    =====       ======        ======
Liabilities & Shareholder's
Equity

Current Liabilities:
    Accounts payable      $    626                               $ 626
    Accrued royalties          776                                 776
    Accrued professional
      fees                   1,141                  (921)          220
    Accrued incentive                                                       
      compensation           1,226                (1,226)            0
    Accrued restructuring
      costs                    211                  (211)            0
    Other accrued expenses   2,791                  (487)        2,304
    Deferred revenue-
    current                  3,156                               3,156
                             -----    -----        -----         -----
Total Current Liabilities    9,927        0       (2,845)        7,082

Deferred Revenue-Long Term   1,879                  (600)        1.279

Long-term Debt - less 
 current maturities              0                 4,207         4,207

Liabilities Subject to
  Chapter 11 Proceedings     9,886                (9,886)            0
                             -----    -----        -----         -----
Total Liabilities           21,692        0       (9,124)       12,568  
                           
Minority Interest               10                                  10

Shareholders' Equity:
  CBC common stock, par 
    value $.01 per share,
    authorized: 40,000,000 
    shares, issued:                                                 
    26,065,000 shares          261                  (261)            0
  Aquila common stock,
    par value $.01 per
    share, authorized:
    30,000,000 shares
    issued: 5,000,000
    shares                       0                    50            50
  Additional paid in 
    capital                120,382                 2,783       123,165
  Unearned compensation       (138)                  138             0
  Deficit                 (112,541)   2,616        2,027      (107,898)
                          ---------  ------      -------       -------
Total Shareholders' Equity   7,964    2,616        4,737        15,317
                          ---------  ------      -------       -------
Total Liabilities and 
  Shareholders' Equity    $ 29,666   $2,616      ($4,387)     $ 27,895
                            ======    =====        =====        ======

The accompanying notes are an integral part of the pro forma financial 
information.
- ----------------------------------------------------------------------------
                        AQUILA BIOPHARMACEUTICALS, INC.
                 Pro Forma Consolidated Statement of Operations 
                     For the Year Ended December 31, 1995
                              (Unaudited)
                   (In thousands, except per share amounts)

                                        PRO FORMA ADJUSTMENTS
                                       ______________________    Aquila
                              CBC      |                    |     Pro
Revenue:                   Historical  Enterics   Retroviral     Forma
                           ----------  --------   ----------     -----
Product Sales              $ 20,854    $ 3,880     $15,863       $1,111
Research and development      5,137          0           0        5,137
Royalties                     1,877          0           0        1,877
                             ------      -----       -----       -----
                             27,868      3,880      15,863        8,125

Cost and expenses:
Cost of sales                16,156      2,201      10,936        3,019
Research & development        6,454        226         728        5,500
Selling, general & 
  administrative              9,955        850       2,613        6,492
                             ------      -----       -----        -----
                             32,565      3,277      14,277       15,011
Other:

Other income and interest
  expense net of interest
  income                        581          0           0          581
                             ------      -----       -----        -----
Income/(Loss) from continuing 
  operations before 
  reorganization 
  items and income tax 
  expense                    (4,116)       603       1,586       (6,305)

Reorganization items:
  Professional fees          (1,200)         0           0       (1,200)
Interest earned on 
  accumulated cash 
  resulting from Chapt.11
  proceedings                   387          0           0          387
                              -----      -----       -----        -----
Total reorganization items     (813)         0           0         (813)

Income/(Loss) from continuing
  operations before 
  income tax expense          -----      -----      ------        -----
                             (4,929)       603       1,586       (7,118)

Income tax expense               (4)         0          (4)           0
                              -----      -----      ------       ------
Income/(Loss) before minority 
interest                     (4,933)       603       1,582       (7,118)

Minority Interest                (9)         0           0           (9)
                              -----      -----       -----       ------
Income/(Loss) from continuing           
operations                   (4,942)       603       1,582       (7,127)
                              =====      =====       =====        =====

Discontinued operations:
   Income from discontinued
     operations                   0          0           0            0
   Gain from disposal             0          0           0            0
                              -----      -----       -----        -----
Net income/(loss)           ($4,942)      $603      $1,582      ($7,127)
                              =====      =====      ======        =====

Net income/(loss) per
  weighted average number
  of common shares:   

  Continuing operations      ($0.19)                           ($1.43)
  Discontinued operations     $0.00                             $0.00
                              -----                             -----
  Net Income/(Loss) per
    share                    ($0.19)                           ($1.43)
                              =====                            =======
Weighted average number
  of common shares                 
  outstanding                26,065                             5,000
                             ======                             =====

The accompanying notes are an integral part of the pro forma financial
information.
- -----------------------------------------------------------------------------
                        AQUILA BIOPHARMACEUTICALS, INC.
                Pro Forma Consolidated Statement of Operations
                For the Six Month Period Ended June 30, 1996
                                (Unaudited)
                   (In thousands, except per share amounts)
                                                                 
                                    PRO FORMA ADJUSTMENTS
                                    ____________________       Aquila 
                        CBC        |                    |        Pro           
                    Historical     Enterics    Retroviral       Forma  
                    ----------     --------    ----------      ------
Revenue:
Product Sales         $8,306                     $7,300        $1,006
Research &                           
 Development           2,657                          0         2,657          
Royalties                905                         15           890     
                      ------         ------       -----         -----   
                      11,868              0       7,315         4,553       
Cost and expenses:
Cost of sales          6,184                      4,633         1,551          
Research & 
 Development           2,715                        273         2,442          
Sales,general 
 and 
 administrative        3,822                        826         2,996          
                       -----         ------       -----         -----   
                      12,721              0       5,732         6,989      
Other:
Other income 
  and interest 
  expense net 
  of interest
  income                 197                          0           197          
                       -----         ------       -----         -----   
Income/(Loss) from 
  continuing 
  operations 
  before 
  reorganization 
  items and income 
  tax expense           (656)             0       1,583        (2,239)    
  
Reorganization 
 items:
Professional 
 fees                   (710)                         0          (710)         
                                                     
Interest earned on 
  accumulated cash 
  resulting from 
  Chapter 11 
  proceedings            230                          0           230          
                        ----          -----        ----          ----   
  Total 
  reorganization 
  items                 (480)             0           0          (480)  
                        ----          -----        ----          ----   
Income/(Loss) from 
  continuing 
  operations 
  before income 
  tax expense         (1,136)             0       1,583        (2,719)  

Income tax 
 expense                  (2)                        (1)           (1)         
                       -----          -----       -----         -----   
Income/(Loss) before 
  minority 
  interest            (1,138)             0       1,582        (2,720)   

Minority Interest         (1)             0          0             (1) 
                       -----          -----       -----         -----  
Income/(Loss) from                                             
continuing 
  operations          (1,139)             0       1,582        (2,721)   

Discontinued 
 operations:
Income from 
 discontinued 
 operations              620           (620)          0             0          
Gain from 
 disposal              4,537         (4,537)          0             0          
                       -----          -----       -----         -----   
Net income/
 (loss)              $ 4,018        ($5,157)     $1,582       ($2,721) 
                       =====          =====       =====         =====  

Net income/(loss) 
 per weighted 
 average number 
 of common shares:              
Continued 
 operations           ($0.05)                                  $(0.54)  
Discontinued 
 operations            $0.20                                   $ 0.00    
                       -----                                    -----   
Net Income/(Loss) 
 per share             $0.15                                  ($ 0.54) 
                       =====                                    =====   
Weighted average 
  number of 
  common shares 
  outstanding         26,065                                    5,000         
                      ======                                    =====   

The accompanying notes are an integral part of the pro forma financial         
information.
- -----------------------------------------------------------------------------
                      AQUILA BIOPHARMACEUTICALS, INC.
                 NOTES TO PROFORMA FINANCIAL STATEMENTS

Note A.   Basis of Presentation

      On October 22, 1996,  Aquila Biopharmaceuticals, Inc.("Aquila" or the
      "Company") sold all of the equity of Cambridge Biotech Corporation
      ("CBC"), to bioMerieux Vitek, Inc. for approximately $6,450,000 in cash.
      The Company will recognize a gain on this transaction in the fourth
      fiscal quarter of 1996.

      The unaudited Pro Forma Consolidated Statements of 
      Operations reflect the Company's results of operations for the year 
      ended December 31, 1995 and the six months ended June 30, 1996, on a 
      pro forma basis assuming the transactions had been completed as of 
      December 31, 1994 and December 31, 1995 respectively.  The unaudited 
      Pro Forma Consolidated Balance Sheet at June 30, 1996, assumes that 
      the transactions had been completed on that date.

      The financials of the enterics and retroviral businesses are intended 
      to present management's estimates of the results of operations and 
      financial condition of the businesses.  Certain of the costs and 
      expenses presented in these financial statements represent allocations 
      and management estimates of the cost of services provided to the 
      business.  As a result, the financial statements presented may not be 
      indicative of the results that would have been achieved had the 
      business operated as a non-affiliated entity.

      On October 21, 1996, CBC consummated a reorganization plan that
      was confirmed by the United States Bankruptcy Court on July 18, 1996.  
      The consummation of the plan involved completing a number of 
      transactions, including the restructuring or payment in cash or stock 
      of all allowed secured, unsecured, administrative and priority tax 
      claims.  As a result of these transactions, the Company paid out 
      approximately $4,387,000 in cash, and will recognize a gain on 
      reorganization in the fourth fiscal quarter of 1996.

      The unaudited Pro Forma Consolidated Balance Sheet at June 30, 1996 
      assumes that the consummation had been completed on that date and is 
      intended to present management's estimate of the impact of the 
      consummation on the financial condition of Aquila.  Certain of the pro 
      forma adjustments represent estimates of the value of certain 
      liabilities subsequent to consummation, and therefore may not be 
      indicative of the results that would have been achieved had the 
      consummation actually occurred on or before June 30, 1996.

Note B.   Pro forma Adjustments:
      
      The balance sheet as of June 30, 1996 gives effect to the following
      pro forma adjustments related to the sale of the common stock of CBC:

      (a)  to record the sale of selected assets of the business 

      (b)  to record the net cash proceeds as an addition to cash

      (c)  to record the estimated pro forma gain on the sale of the 
           retroviral business

      The balance sheet as of June 30, 1996 gives effect to the following
      pro forma adjustments related to the consummation of the reorganiza-
      tion plan:

      (a)  to record the expenditure of cash for the satisfaction of
           pre-petition and administration claims and professional fees

      (b)  to record the reduction of liabilities related to paid claims
           and the adjustment of certain estimated liabilities

      (c)  to record the effect on shareholders' equity of the exchange
           of Aquila shares for CBC shares

      (d)  to record the estimated pro forma gain on reorganization

- -----------------------------------------------------------------------------
                              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.

                                  AQUILA BIOPHARMACEUTICALS, INC.



                                  /s/ Alison Taunton-Rigby
 Date:  October 31, 1996          ____________________________________
                                  Alison Taunton-Rigby, President


                                     EXHIBITS

         4.1  Form of Stock Certificate for Aquila Common Stock








        Number                                       Shares
        FBU                                          
        Incorporated Under the                       See Reverse for
        Laws of the State of                         Certain Definitions
        Delaware                                     CUSIP 03839F 10 7
        This Certificate is 
        Transferable in Boston,
        MA or New York, NY


                                      AQUILA
                          AQUILA BIOPHARMACEUTICALS, INC.

                                    [SPECIMEN]

        is the owner of


              FULLY PAID AND NON-ASSESSABLE SHARES, OF THE PAR VALUE
                       OF $.01 EACH, OF THE COMMON STOCK OF

        AQUILA BIOPHARMACEUTICALS, INC. transferable on the books of the
        Corporation by the holder hereof in person or by duly authorized
        attorney upon surrender of this certificate properly endorsed.

        This Certificate is not valid unless countersigned and registered
        by the Transfer Agent and Registrar.

        WITNESS the seal of the Corporation and the signatures of its duly
        authorized officers.

                                           AQUILA BIOPHARMACEUTICALS, INC.


        Dated:                             By: /s/Alison Taunton-Rigby
                                               President

                                           By: /s/Stephen J. DiPalma
                                               Treasurer

        Countersigned and Registered:
             THE FIRST NATIONAL BANK OF BOSTON
                       Transfer Agent and Registrar


        By:__________________________
            Authorized Signature

                         [AQUILA BIOPHARMACEUTICALS, INC.]
                                 [CORPORATE SEAL]
                                      [1996]
                                    [DELAWARE]<PAGE>






             The Corporation will furnish without charge to each
        stockholder who so requests the designations, preferences and
        relative, participating, optional or other special rights of each
        class of stock or series thereof and the qualifications,
        limitations or restrictions of such preferences and/or rights.
        Requests may be directed to the Secretary of the Corporation at
        its principal office, or to the Transfer Agent.

             The following abbreviations, when used in the inscription on
        the face of this certificate, shall be construed as though they
        were written out in full according to applicable laws or
        regulations:

             TEN COM - as tenants in common
             TEN ENT - as tenants by the entireties
             JT TEN  - as joint tenants with right of survivorship and not 
                       as tenants in common
             UNIF GIFT MIN ACT - .............Custodian...............
                                     (Cust)                 (Minor)

                                 Under Uniform Gifts to Minors

                                 Act .................................
                                                (State)

        Additional abbreviations may also be used though not in the above
        list.

        FOR VALUE RECEIVED, ________________________ hereby sell, assign
        and transfer unto

        Please insert Social Security or Other
        Identifying Number of Assignee
        _____________________________

        _____________________________


        __________________________________________________________________
                   (Please print or typewrite name and address,
                          including Zip Code of Assignee)

        __________________________________________________________________

        __________________________________________________________________

        ___________________________________________________________ shares 

        of the capital stock represented by the within Certificate, and do
        hereby irrevocably constitute and appoint

        _________________________________________________________ Attorney<PAGE>




        to transfer the said stock on the books of the within named
        Corporation with full power of substitution in the premises.

        Dated ___________________________


                            NOTICE: ______________________________________
                                    The signature to this Assignment must
                                    correspond with the name as written
                                    upon the face of the certificate in 
                                    every particular, without alteration
                                    enlargement or any change whatever.


        SIGNATURE(S) GUARANTEED: ________________________________________
                                 The signature(s) should be guaranteed by
                                 an eligible guarantor institution (Banks,
                                 Stockholders, Savings and Loan
                                 Associations and Credit Unions with
                                 membership in an approved Signature
                                 Guarantee Medallion Program pursuant to
                                 S.E.C. Rule 17 Ad-15.


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