AMERICAN MOBILE SATELLITE CORP
10-Q, 1999-11-15
COMMUNICATIONS SERVICES, NEC
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<PAGE>






                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 10-Q
             QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                For the quarterly period ended September 30, 1999
                         Commission file number 0-23044

                      AMERICAN MOBILE SATELLITE CORPORATION
             (Exact name of registrant as specified in its charter)

                               DELAWARE 93-0976127
                        (State or other (I.R.S. Employer
                       jurisdiction of Identification No.)
                                incorporation or
                                  organization)

      10802 Parkridge Boulevard
               Reston, VA                             20191-5416
         (Address of principal                        (Zip Code)
            executive offices)

                                 (703) 758-6000
                         (Registrant's telephone number,
                              including area code)


Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  report(s)),  and (2) has been  subject  to such  filing
requirements for the past 90 days. Yes X No

Number of shares of Common Stock outstanding at October 31, 1999: 48,496,077





<PAGE>





                                      PART I - FINANCIAL INFORMATION
                                      Item 1.  Financial Statements

                          American Mobile Satellite Corporation and Subsidiaries

                               Consolidated Condensed Statements of Operations
                               -----------------------------------------------
                                                 (Unaudited)
<TABLE>
<CAPTION>

                                                                      Three Months Ended           Nine Months Ended
                                                                        September 30,                September 30,
                                                                        -------------                -------------
                                                                  1999               1998         1999            1998
                                                                  ----               ----         ----            ----
                                                                             (in thousands, except per share data)

REVENUES
<S>                                                           <C>               <C>           <C>             <C>
  Services                                                    $  17,290         $  17,661       $50,076         $40,749
  Sales of equipment                                              5,680             4,141        15,997          13,485
                                                                 ------            ------        ------          ------
  Total Revenues                                                 22,970            21,802        66,073          54,234

COSTS AND EXPENSES
  Cost of service and operations                                 17,287            15,545        51,673          39,498
  Cost of equipment sold                                          6,045             4,826        17,167          14,122
  Sales and advertising                                           5,548             5,429        16,018          13,855
  General and administrative                                     13,119             4,514        22,596          13,918
  Depreciation and amortization                                  14,911            13,864        42,315          38,484
                                                                 ------            ------        ------          ------

  Operating Loss                                                (33,940)          (22,376)      (83,696)        (65,643)

INTEREST EXPENSE                                                (18,136)          (15,504)      (50,957)        (37,848)
INTEREST AND OTHER INCOME                                           990             1,582         4,622           3,330
UNREALIZED LOSS ON NOTE RECEIVABLE FROM
  XM RADIO                                                           --                --        (9,919)             --
UNREALIZED (LOSS) GAIN ON NOTE PAYABLE TO
  RELATED  PARTY                                                 (2,807)               --         7,229              --
EQUITY IN LOSS OF XM RADIO                                           --            (3,086)       (6,692)         (9,618)
                                                                -------            -------       -------         -------

LOSS BEFORE EXTRAORDINARY ITEM                                  (53,893)          (39,384)     (139,413)       (109,779)

EXTRAORDINARY LOSS ON EXTINGUISHMENT OF
DEBT                                                            (12,132)               --       (12,132)             --
                                                                --------          -------      ---------        --------

  NET LOSS                                                     $(66,025)         $(39,384)    $(151,545)      $(109,779)
                                                                ========          =======      =========        ========

Basic and Diluted Loss Per Share of common stock before
  extraordinary item                                          $   (1.18)        $  ( 1.24)       $(3.79)         $(3.71)
Basic and Diluted Loss Per Share Extraordinary item           $   (0.27)              ---        $(0.33)            ---
Basic and Diluted Net Loss Per Share of common stock          $   (1.45)        $   (1.24)       $(4.12)         $(3.71)

Weighted-average common shares outstanding during the
  period                                                         45,421            31,773        36,740          29,604

</TABLE>

See notes to consolidated condensed financial statements.


<PAGE>



                          American Mobile Satellite Corporation and Subsidiaries
                                   Consolidated Condensed Balance Sheets
                                                (Unaudited)
<TABLE>
<CAPTION>

                                                                            September 30,    December 31,
                                                                            -------------    ------------
                                                                                 1999            1998
                                                                                 ----            ----
                                                                                    (In thousands)
                                     ASSETS

CURRENT ASSETS
<S>                                                                         <C>               <C>
  Cash and cash equivalents                                                 $  61,431         $   2,285
  Inventory                                                                    19,597            18,593
  Prepaid in-orbit insurance                                                    4,830             3,381
  Accounts receivable-- net                                                    18,062            15,325
  Restricted short-term investments                                            41,038            41,038
  Other current assets                                                         17,401            13,231
                                                                              -------           -------
         Total current assets                                                 162,359            93,853
PROPERTY & EQUIPMENT-- net                                                    220,478           246,553
SYSTEM UNDER CONSTRUCTION                                                     279,549                --
GOODWILL & INTANGIBLES-- net                                                   85,533            53,235
RESTRICTED INVESTMENTS                                                         50,308            67,199
DEFERRED CHARGES & OTHER ASSETS-- net                                          31,740            28,954
                                                                              -------          --------
         Total assets                                                       $ 829,967          $489,794
                                                                              =======          ========
                       LIABILITIES & STOCKHOLDERS' EQUITY (DEFICIT)
CURRENT LIABILITIES
  Accounts payable & accrued expenses                                       $  58,790         $  33,797
  Obligations under capital leases due within one year                          2,854             5,971
  Vendor financing due to related party within one year                         1,715               543
  Deferred trade payables due within one year                                   6,094             4,498
  Other current liabilities                                                        --               162
                                                                               ------            ------
         Total current liabilities                                             69,453            44,971
LONG-TERM LIABILITIES
  Obligations under  Bank Financing                                            72,000           132,000
  Obligations under Senior Notes, net of discount                             327,351           327,147
  Series A subordinated convertible notes of  XM Radio
     and accrued interest thereon                                             256,258                --
  Capital lease obligations                                                     5,034             5,824
  Net assets acquired in excess of purchase price                               1,507             2,028
  Vendor financing due to related party                                         2,438             1,069
  Convertible note payable to related party, at fair value                     15,188                --
  Deferred trade payables                                                          --               620
  Investment in XM Radio                                                           --            12,618
  Other long-term liabilities                                                   1,906               540
                                                                              -------           -------
         Total long-term liabilities                                          681,682           481,846
                                                                              -------           -------
         Total liabilities                                                    751,135           526,817

STOCKHOLDERS' EQUITY (DEFICIT)
  Preferred Stock                                                                  --                --
  Common Stock                                                                    485               322
  Additional paid-in capital                                                  763,318           508,084
  Deferred compensation                                                        (5,431)           (1,528)
  Common Stock purchase warrants                                               63,397            59,108
  Unamortized guarantee warrants                                              (22,061)          (33,678)
  Cumulative loss                                                            (720,876)         (569,331)
                                                                             ---------         ---------
         Total stockholders' equity (deficit)                                  78,832           (37,023)
                                                                               ------           --------
         Total liabilities and stockholders' equity (deficit)                $829,967          $489,794
                                                                             ========          ========
</TABLE>

See notes to consolidated condensed financial statements.


<PAGE>





                          American Mobile Satellite Corporation and Subsidiaries
                              Consolidated Condensed Statements of Cash Flows
                                                (Unaudited)
<TABLE>
<CAPTION>

                                                            Nine Months Ended
                                                               September 30,
                                                               -------------
                                                           1999            1998
                                                           ----            ----
                                                              (in thousands)
CASH FLOWS FROM OPERATING ACTIVITIES:
<S>                                                     <C>            <C>
Net loss                                                ($151,545)     ($109,779)
Adjustments to reconcile net loss to net cash used in
  operating activities:
  Amortization of guarantee warrants, debt discount
    and issuance costs                                     13,151         11,622
  Depreciation and amortization                            42,315         38,484
  Extraordinary loss on extinguishment of debt             12,132             --
  Equity in loss of XM Radio                                6,692          9,618
  Net unrealized loss on marketable securities              2,690             --
  Changes in assets and liabilities:
    Inventory                                              (1,004)         3,938
    Prepaid in-orbit insurance                             (1,449)          (266)
    Trade accounts receivable                              (5,395)         2,126
    Other current assets                                   (7,629)           281
    Accounts payable and accrued expenses                  (9,778)       (12,558)
    Interest payable on Senior notes                       20,519         20,519
    Deferred trade payables                                   975         (5,330)
    Deferred items-- net                                      393              6
                                                           ------         ------
Net cash used in operating activities                     (77,933)       (41,339)
                                                           ------         ------

CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property and equipment                        (9,928)        (7,376)
System under construction                                 (75,579)            --
Purchase of XM Radio note receivable                      (21,419)            --
XM Radio Acquisition costs                                   (788)            --
Acquisition of ARDIS                                           --        (51,440)
Purchase of long-term, restricted investments              (3,613)      (143,312)
                                                          -------        -------
Net cash used in investing activities                    (111,327)      (202,128)
                                                          -------        -------

CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of Common Stock                    121,974            412
Principal payments under capital leases                    (4,421)        (2,541)
Principal payments under Vendor Financing                    (861)            --
Proceeds from Bank Financing                               52,000         39,000
Proceeds from Series A subordinated convertible
    notes of XM Radio                                     250,000             --
Repayment of Term loan                                    (59,000)            --
Repayment of XM Radio bank loan                               (73)            --
Repayment of WorldSpace loan by XM Radio                  (75,000)            --
Repayments on Revolver                                    (53,000)            --
Proceeds from reduction of interest rate swap               6,009             --
Proceeds from note payable to related party                21,500             --
Repayment of Bank Financing                                    --       (100,000)
Proceeds from bridge financing                                 --         10,000
Repayment of bridge financing                                  --        (10,000)
Payments on long-term debt                                     --         (4,933)
Proceeds from Senior Notes and Stock Purchase Warrants         --        335,000
Debt issuance costs & deferred charges                    (10,722)       (14,982)
                                                           ------         ------
Net cash provided by financing activities                 248,406        251,956
                                                          -------        -------
Net increase in cash and cash equivalents                  59,146          8,489
CASH AND CASH EQUIVALENTS, beginning of period              2,285          2,106
                                                          -------        -------
CASH AND CASH EQUIVALENTS, end of period                  $61,431        $10,595
                                                          =======        =======
</TABLE>

See notes to consolidated condensed financial statements.



<PAGE>





                         PART I - FINANCIAL INFORMATION
                    Item 1. Financial Statements (continued)
             American Mobile Satellite Corporation and Subsidiaries
              Notes to Consolidated Condensed Financial Statements
                               September 30, 1999
                                   (Unaudited)

1. Organization and Business

     American Mobile Satellite  Corporation  (with its  subsidiaries,  "American
Mobile" or the  "Company") is a nationwide  provider of wireless  communications
services,  including data, dispatch,  and voice services,  primarily to business
customers  in the United  States.  American  Mobile is  devoting  its efforts to
expanding its business.  This effort involves  substantial  risk.  Specifically,
future  operating  results will be subject to  significant  business,  economic,
regulatory,   technical,   and  competitive   uncertainties  and  contingencies.
Depending  on their extent and timing,  these  factors,  individually  or in the
aggregate, could have an adverse effect on the Company's financial condition and
future results of operations.

     In addition to its core wireless communications  business,  American Mobile
has a controlling  interest in XM Satellite  Radio  Holdings Inc., a development
stage  company.  On July 7, 1999, the Company  acquired  certain debt and equity
interests in XM Satellite Radio Holdings Inc.,  then owned by WorldSpace,  Inc.,
in exchange for  approximately  8.6 million shares of the Company's  stock ( the
"XM  Acquisition").  XM Satellite Radio Holdings Inc., through its subsidiary XM
Satellite  Radio Inc.  (together  with XM Satellite  Radio  Holdings  Inc.,  "XM
Radio"),  is one  of two  entities  awarded  a  license  by the  FCC to  provide
satellite-based  Digital  Audio Radio  Service  ("DARS")  throughout  the United
States.  XM Radio is  currently  engaged in efforts to construct  its  satellite
system. As a result of the XM Acquisition,  XM Radio's financial results for the
period  July 7, 1999  through  September  30,  1999 have  been  included  in the
Company's  Consolidated  Condensed Financial Statements.  Prior to July 7, 1999,
the  Company's  investment  in XM Radio was accounted for pursuant to the equity
method of  accounting.  See Note  3-Purchase  of XM Radio and Note  9-Subsequent
events regarding XM Radio's initial public offering.

2. Significant Accounting Policies

Basis of Presentation

     The unaudited  consolidated  condensed financial statements included herein
have been prepared  pursuant to the rules and  regulations of the Securities and
Exchange Commission (the "SEC").  Certain  information and footnote  disclosures
normally included in financial  statements prepared in accordance with generally
accepted accounting principles have been condensed or omitted. While the Company
believes  that the  disclosures  made are  adequate to not make the  information
misleading,   these  consolidated   financial   statements  should  be  read  in
conjunction  with  the  consolidated  financial  statements  and  related  notes
included  in the  Company's  filings  and  the  filings  of XM  Radio  with  the
Securities and Exchange Commission.

     The  consolidated   balance  sheet  as  of  September  30,  1999,  and  the
consolidated  statements  of  operations  for the  three and nine  months  ended
September  30,  1999 and  1998,  and the cash  flows for the nine  months  ended
September 30, 1999 and 1998, have been prepared by the Company and are



<PAGE>


unaudited.  In the opinion of management,  all adjustments (consisting of normal
recurring  adjustments)  necessary  to present  fairly the  financial  position,
results of operations  and cash flows at September 30, 1999, and for all periods
presented  have been made.  As a result of the XM  Acquisition  and  pursuant to
generally  accepted  accounting  principles,  the balance  sheet at December 31,
1998, the statement of operations for the three and nine months ended  September
30, 1998, and the statement of cash flow for the nine months ended September 30,
1998,  have been restated to record the Company's  portion of the losses from XM
Radio which had been previously suspended under the equity method of accounting.
The effect of this restatement was to increase the Company's previously reported
net loss for the three and nine  months  ended  September  30,  1998 from  $36.3
million to $39.4 million and from $100.5 million to $109.8 million respectively.
The loss per share  increased  from  $1.14 to $1.24 for the three  months  ended
September  30, 1998 and from $3.39 to $3.71 for the nine months ended  September
30, 1998.

     Certain  amounts  from  prior  years have been  reclassified  to conform to
current year presentation.

Net Loss Per Share


     Basic and diluted  loss per common  share is based on the  weighted-average
number of shares of Common Stock  outstanding  during the period.  Stock options
and common stock purchase warrants are not reflected since their effect would be
antidilutive.  As of September 30, 1999,  there were  approximately  5.6 million
options and warrants that would have been included in this  calculation  had the
effect not been antidilutive.

Comprehensive Income

     SFAS No. 130, "Reporting of Comprehensive Income," requires  "comprehensive
income" and the components of "other comprehensive income" to be reported in the
financial  statements and/or notes thereto.  Since the Company does not have any
components of "other  comprehensive  income," reported net income is the same as
"comprehensive  income" for the three and nine months ended  September  30, 1999
and 1998.

Segment Disclosures

     In accordance with SFAS 131,  "Disclosures  about Segments of an Enterprise
and  Related  Information,"  the Company has two  operating  segments:  wireless
communications  and  satellite-based  digital audio radio  service.  The Company
provides wireless  communications  services within North America, the Caribbean,
and U.S.  coastal  waters.  All revenues are derived from  customers  within the
United States.  XM Radio is in the process of constructing  its satellite system
to provide digital radio  programming  transmitted  from satellites to vehicles,
homes, and portable radios.  XM Radio is currently in the development  stage and
thus  has  no  revenue  generating  operations.  The  following  summarizes  the
Company's core wireless  communications  service and equipment  revenue by major
product lines:

<TABLE>
<CAPTION>

                                    Revenue for the           Revenue for the
                                      Three Months           Nine Months Ended
                                   Ended September 30,         September 30,
                                    1999         1998         1999         1998
                                                        (in millions)
<S>                               <C>         <C>             <C>        <C>
Voice Service                     $  3.5      $   3.9         $9.7       $  10.6
Data Service                        12.6         12.8         36.9          27.3
Equipment                            5.7          4.1         16.0          13.5
Capacity Resellers and Other         1.2          1.0          3.5           2.8

</TABLE>



<PAGE>



Recently Adopted Accounting Pronouncements

     In June 1998,  FASB issued  Statement No. 133,  "Accounting  for Derivative
Instruments  and Hedging  Activities,"  which  requires the  recognition  of all
derivatives  as either  assets  or  liabilities  measured  at fair  value.  This
statement is effective for the year ending December 31, 2000. In June 1999, FASB
issued  Statement No. 137,  which defers the effective date of Statement No. 133
until  fiscal  quarters  beginning  after June 15,  2000.  The Company  does not
believe that the adoption of this statement  will have a material  impact on its
financial position, results of operations and cash flows.

Concentration of Credit Risk

     For the nine months ended September 30, 1999, four customers  accounted for
approximately 29% of the Company's service revenue,  with one of those customers
representing approximately 14%.

Other

     The  Company  paid  approximately  $6.2  million  and $7.6  million  in the
nine-month periods ended September 30, 1999 and 1998,  respectively,  to related
parties for capital  assets,  service-related  obligations,  and payments  under
pre-existing  financing agreements.  There were no payments from related parties
in the nine-month  period ended  September 30, 1999, as compared to $4.3 million
for  communication  services and equipment  purchases in the  nine-month  period
ended September 30, 1998. Total  indebtedness to related parties as of September
30, 1999 approximated $19.8 million.

3. Purchase of XM Radio

     On  July 7,  1999,  the  Company  acquired  WorldSpace's  debt  and  equity
interests  in XM Radio,  other than a $75  million  loan from  WorldSpace  to XM
Radio, in exchange for  approximately 8.6 million shares of the Company's common
stock.  The  total  consideration  given for the  purchase  of XM Radio was $129
million.  The  Company  also  incurred  approximately  $0.9  million for certain
acquistion related expenses.   In conjunction with the XM Acquisition,  XM Radio
was recapitalized  and issued an $82 million  convertible note receivable to the
Company.  This  note is  convertible  into  Class B common  shares  of XM Radio.
Concurrently  with this  transaction,  XM Radio  issued $250 million of Series A
subordinated convertible notes to several new strategic and financial investors,
including General Motors Corporation, Clear Channel Investments, DIRECTV, Telcom
Ventures,  Columbia  Capital and Madison  Dearborn  Partners.  XM Radio used $75
million of the proceeds from these notes to repay the  outstanding  loan payable
to WorldSpace.  As a result of these transactions,  the Company owned all of the
issued and outstanding stock of XM Radio as of July 7, 1999.

     On October 8, 1999, XM Radio consummated an initial public offering of 10.2
million shares of its Class A Common Stock. As a result of this transaction, the
Company's  convertible  notes were converted into additional  shares of XM Radio
Class B stock and the Company's voting interest in XM Radio was reduced to 62.3%
and its  economic  interest  in XM Radio was  reduced  to 30.5%  (in each  case,
excluding  shares of XM Radio  Class B stock owned by the Company but pledged to
Baron Asset Fund in connection with the transaction  described in Note 5 below).
See Note 9- Subsequent Events.



<PAGE>


     Prior to July 7,  1999,  the  Company's  proportionate  share of XM Radio's
losses have been included in the accompanying  statement of operations  pursuant
to the equity method of accounting. In connection with the XM Acquisition and in
accordance  with  generally  accepted  accounting  principles,  the  Company was
required to restate its  financial  statements  for the year ended  December 31,
1998 and for the  quarter  ended  March 31, 1999 to record its share of XM Radio
losses previously suspended under the equity method of accounting. This resulted
in the Company recording  additional  losses of approximately  $12.6 million for
the year ended  December 31, 1998,  and $3.5 million for the quarter ended March
31,  1999.  The  acquisition  was  accounted  for under the  purchase  method of
accounting  for  business  combinations.  The  purchase  price  was  preliminary
assigned to the assets and liabilities of XM Radio based on their estimated fair
values on the date of the acquisition. The Company's preliminary estimate of the
excess  of the  purchase  price  over the fair  market  value of the net  assets
acquired is $34 million. The Company has not yet specifically identified amounts
to assign to certain intangibles and licenses;  changes in the amounts allocated
to such assets  could  result in changes to the amount of goodwill  recorded.  A
preliminary  amortization  period of fifteen years has been  selected,  which is
expected in all  material  respects  to be  representative  of the  amortization
expense that will result from the ultimate allocation to the specific intangible
assets.  The  results of XM Radio are  included  in the  consolidated  condensed
financial  statements as of the effective date of the acquisition,  July 7, 1999
through September 30, 1999.

     On a pro forma basis,  assuming the XM Acquisition had been  consummated on
January 1 of each of the periods  presented,  the  following  results would have
been reflected. The pro forma results are based on historical information and do
not  necessarily  reflect  the actual  results  that would have  occurred if the
combination  occurred at the beginning of each year presented,  nor reflects the
future results of the combined entity.


<TABLE>
<CAPTION>

                                            Nine Months            Nine Months
                                               Ended                  Ended
                                            September 30,          September 30,
                                               1999                   1998
                                            -------------          -------------
<S>                                           <C>                    <C>
 Revenues                                     $66,073                $54,234
 Loss before extraordinary item              (142,222)              (113,854)
 Net Loss                                    (154,354)              (113,854)
 Loss per share                                 (3.62)                 (2.98)

</TABLE>

4. Liquidity and Financing

Liquidity and Financing Requirements

     Adequate  liquidity and capital are critical for the Company to continue as
a going concern and to fund subscriber acquisition programs necessary to achieve
positive cash flow and profitable operations. The Company expects to continue to
make significant capital outlays to fund interest expense,  capital expenditures
and working  capital prior to the time that it begins to generate  positive cash
flow from operations and for the foreseeable future thereafter.

     XM Radio is  operated,  managed,  and funded  separately  from the Company.
While  the  Company  does not have any  obligation  or  commitments  to  provide
additional funding to XM Radio, and does not expect to provide such funding,  it
may choose to provide additional  financing in the future. XM Radio will require
significant  additional financing in the future. XM Radio is currently exploring
several  financing  arrangements,  which  may  include  selling  debt or  equity
securities  or  obtaining  loans  from  commercial   banks  or  other  financial
institutions.  The failure of XM Radio to obtain required financing could have a
material adverse effect on the value of the Company's investment in XM Radio.



<PAGE>



     On March  31,  1998,  Acquisition  Company  issued  $335  million  of units
consisting  of 12 1/4%  Senior  Notes due 2008  (the  "Senior  Notes"),  and one
warrant to  purchase  3.75749  shares of Common  Stock of the  Company  for each
$1,000 principal amount of Senior Notes (the "Warrants"),  and also restructured
its existing bank financing (the "New Bank  Financing").  The New Bank Financing
consists  of a  $100  million  unsecured  five-year  reducing  Revolving  Credit
Facility maturing March 31, 2003 and a $100 million five-year Term Loan Facility
with up to three additional  one-year  extensions subject to lender approval,  a
portion of which has been permanently reduced, as discussed below. Additionally,
on March 29, 1999, the Bank Facility  Guarantors (as defined in Item 2 under the
caption "Liquidity and Capital Resources") agreed to eliminate certain covenants
relating to the Company's future earnings before interest, taxes,  depreciation,
and  amortization   ("EBITDA")  and  service  revenue.   In  exchange  for  this
elimination of covenants,  the Company agreed to reprice the Guarantee  Warrants
(as defined in Item 2 under the  caption  "Liquidity  and  Capital  Resources"),
effective  April 1, 1999,  from $12.51 to $7.50.  The value of the repricing was
approximately  $1.5  million.  As of September  30, 1999,  the Company had $69.0
million   available  for  borrowing   under  the  Revolving   Credit   Facility.
Additionally,  Motorola has agreed to provide the Company with up to $10 million
of vendor financing (the "Vendor Financing  Commitment"),  which is available to
finance up to 75% of the purchase  price of additional  base stations  needed to
meet the Company's buildout requirements under certain customer contracts. As of
September 30, 1999, $4.2 million was outstanding under this facility.

     On August 3, 1999,  the Company  raised $116 million,  net of  underwriting
discounts and expenses, through the issuance of 7.0 million shares of its common
stock in a public  offering.  Of these proceeds,  approximately  $59 million was
used to pay down a portion of the Term Loan  Facility,  and is not available for
re-borrowing.  The  remainder of the proceeds were used to pay down a portion of
the  Revolving  Credit  Facility,  which will be available  for re-borrowing  as
needed for general working capital purposes. As a result of the partial pay down
of the Term  Loan  Facility,  the  Company  recorded  an  extraordinary  loss on
extinguishment  of debt of  approximately  $12.1  million,  which  reflects  the
write-off,  on a  pro-rata  basis,  of  warrants  held  by  certain  shareholder
guarantors of the New Bank  Financing  (the  "Guarantee  Warrants") and deferred
financing fees associated  with the placement of the New Bank  Financing.  There
was no tax benefit  recognized for the  extraordinary  loss because it increases
the Company's current net loss position.

     As a result of the automatic  application of certain adjustment  provisions
following  the issuance of the 7.0 million  shares in the public  offering,  the
exercise  price of the  Guarantee  Warrants was reduced to $7.3571 per share and
the Guarantee  Warrants  became  exercisable  for an additional  126,246 shares.
Additionally,  the  exercise  price of the warrants  associated  with the Senior
Notes was  reduced  to  $12.28  per  share  and the  aggregate  number of shares
issuable upon the exercise of such warrants was increased by 24,291 shares.  The
additional Guarantee Warrants and repricing were valued at $2.4 million, and the
additional Senior Notes warrants and repricing were valued at $440,000.

     On July 7, 1999 XM Radio  issued  $250  million  of  Series A  subordinated
convertible  notes to several new strategic and  financial  investors  including
General Motors Corporation, Clear Channel Investments, DIRECTV, Telcom Ventures,
Columbia  Capital and Madison  Dearborn  Partners.  The notes bear interest at a
rate equal to  six-month  LIBOR plus 5% per annum,  and mature on  December  31,
2004,  unless  extended in certain  circumstances  if XM Radio issues high yield
debt  securities.  The principal amount and all accrued interest is payable in a
single installment on the maturity date or on the date of conversion.  The notes
and all accrued  interest  thereon are convertible  into Class A Common Stock or
Series A convertible  preferred stock of XM Radio at a conversion price of $9.52
per share at the election of the note holders or upon the  occurrence of certain
events,  including an initial public  offering of a prescribed  size of XM Radio
shares.  Subsequent to September 30, 1999, XM Radio completed its initial public
offering, which triggered the conversion of these notes into 10.8 million shares
of  Series A  convertible  preferred  stock and 16.2  million  shares of Class A
common stock. See Note 9- Subsequent events.

     XM Radio estimates that it will require in total approximately $1.1 billion
from its inception through the commencement of commercial  operations,  which is
targeted for the second  quarter of 2001,  to develop and implement the XM Radio
system as well as to provide working  capital needs.  Including the funds raised
in its initial public offering, XM Radio has raised $445 million to date, net of
expenses  and  repayment of debt,  through the issuance of debt and equity.  The




<PAGE>

funds  have  been used to  acquire  its FCC  license,  make  payments  under its
satellite  contract and various other  contractual  commitments with vendors and
strategic partners, as well as for working capital and operating expenses. Total
capital  expenditures  from XM Radio's inception through September 30, 1999 were
$228.4 million.

     The Company's current operating assumptions and projections,  which reflect
management's  best  estimate  of  subscriber  and revenue  growth and  operating
expenses,  indicate that anticipated  capital  expenditures,  operating  losses,
working capital and debt service  requirements  through 1999 and beyond,  can be
met by cash flows from operations,  the net proceeds from the issuance of common
stock in August  1999,  the net  proceeds  from the sale of the Senior Notes and
Warrants,  together  with the  borrowings  under the New Bank  Financing and the
Vendor  Financing  Commitment;  however,  the  Company's  ability  to  meet  its
projections is subject to numerous  uncertainties  and there can be no assurance
that the Company's  current  projections  regarding the timing of its ability to
achieve positive operating cash flow will be accurate, and if the Company's cash
requirements  are more  than  projected,  the  Company  may  require  additional
financing  in  amounts  which may be  material.  The type,  timing  and terms of
financing  selected by the Company will be  dependent  upon the  Company's  cash
needs, the availability of other financing sources and the prevailing conditions
in the financial  markets.  There can be no assurance that any such sources will
be available to the Company at any given time or available on favorable terms.

5. Baron XM Radio Convertible Note

     On January 15, 1999,  the Company issued to Baron Asset Fund  ("Baron"),  a
related party, a $21.5 million note  convertible  into shares of common stock of
XM Radio (the  "Baron XM Radio  Convertible  Note").  The  Company  subsequently
loaned  approximately  $21.4 million to XM Radio in exchange for XM Radio common
stock  and a  note  convertible  into  XM  Radio  shares  (the  "XM  Radio  Note
Receivable"). The Baron XM Radio Convertible Note ranks subordinate to all other
debt  securities  of the  Company  and is fully  collateralized  by shares of XM
Radio.  The XM Radio Note  Receivable is a non-recourse  note. The XM Radio Note
Receivable  earns  interest  at LIBOR plus 5% and is due on December  31,  2004,
unless  extended,  in certain  circumstances  if XM Radio issues high yield debt
securities.  Subsequent to September  30, 1999,  XM Radio  completed its initial
public offering,  which triggered the conversion of the XM Radio Note Receivable
into 1.5 million shares of XM Radio Class B common stock. See Note 9- Subsequent
events.  The Baron XM Radio  Convertible Note accrues interest at the rate of 6%
annually,  with all payments  deferred  until  maturity,  December 31, 2004,  or
extinguished upon conversion. The Company has the option to satisfy the Baron XM
Radio  Convertible  Note by  tendering  the shares into which it would have been
convertible in lieu of any cash payments.

     The  Company's  September  30, 1999  consolidated  condensed  balance sheet
reflects  management's  estimate  of the  fair  value  of  the  Baron  XM  Radio
Convertible  Note.  Changes in the fair value of the Baron XM Radio  Convertible
Note are reflected in the accompanying  statement of operations as an unrealized
gain or loss on note  payable  to  related  party  ($2.8  million  loss and $7.2
million  gain  for  the  three  and   nine-months   ended  September  30,  1999,
respectively).  Prior to the XM  Acquisition,  the Company also  recorded the XM
Radio Note Receivable at management's  best estimate of its fair value, and as a
result,  recorded an  unrealized  loss on the XM Radio Note  Receivable  of $9.9
million  for  the  six  months  ended  June  30,  1999.  As a  result  of the XM
Acquisition, the XM Radio Note Receivable is eliminated in consolidation.

6. Legal and Regulatory Matters

     The  ownership and operation of the mobile  satellite  services  system and
ground-based  two-way  wireless  data  system  are  subject  to  the  rules  and
regulations of the FCC, which acts under authority granted by the Communications
Act and related federal laws. Among other things,  the FCC allocates portions of
the radio  frequency  spectrum to certain  services  and grants  licenses to and
regulates  individual  entities  using the spectrum.  American  Mobile  operates
pursuant to various licenses granted by the FCC.

     The successful  operation of the satellite network is dependent on a number
of factors,  including  the amount of  L-band  spectrum  made  available  to the
Company pursuant to an international  coordination process. The United States is
currently  engaged in an  international  process of  coordinating  the Company's
access to the  spectrum  that the FCC has  assigned  to the  Company.  While the
Company  believes that  substantial  progress has been made in the  coordination
process and expects that the United  States  government  will be  successful  in



<PAGE>


securing the necessary spectrum,  the process is not yet complete. The inability
of the United States  government  to secure  sufficient  spectrum  could have an
adverse effect on the Company's  financial  position,  results of operations and
cash flows.

     The  Company  has the  necessary  regulatory  approvals,  some of which are
pursuant to special temporary authority, to continue its operations as currently
contemplated.  The  Company has filed  applications  with the FCC and expects to
file applications in the future with respect to the continued operations, change
in  operation  and  expansion  of its network and  certain  types of  subscriber
equipment.  Certain of its  applications  pertaining to future service have been
opposed.  While the Company, for various reasons,  believes that it will receive
the necessary  approvals on a timely basis,  there can be no assurance  that the
requests  will be  granted;  granted  on a timely  basis or will be  granted  on
conditions favorable to the Company. Any significant changes to the applications
resulting  from the  FCC's  review  process  or any  significant  delay in their
approval could adversely  affect the Company's  financial  position,  results of
operations and cash flows.

     There are  applications  now  pending  before  the FCC to use the  Inmarsat
system and TMI's  Canadian-licensed  system, both of which operate in the Mobile
Satellite  Services  ("MSS") L-band and have satellite  footprints  covering the
United  States,  to provide  service in the United States.  American  Mobile has
opposed  these  filings.  In addition to  providing  additional  competition  to
American  Mobile,  a grant of domestic  authority by the FCC to use any of these
foreign  systems may  increase  the demand by these  systems for spectrum in the
international  coordination process and could adversely affect American Mobile's
ability to coordinate its spectrum access.

     On July 20,  1998,  the  International  Bureau  of the FCC  granted  SatCom
Systems,  Inc. a Special Temporary  Authority ("STA") to use TMI's space segment
to  conduct  market  tests in the U.S.  for six  months  using up to 500  mobile
terminals  for 180  days  on a  private  carrier  basis  so that it may  conduct
marketing  trials;  this  special  temporary  authority is likely to be extended
until the FCC acts on SatCom's  underlying  application for a blanket license to
operate up to 25,000 mobile terminals in the United States on a permanent basis.
On July 30, 1998,  American  Mobile filed an Application for Review and a Motion
for Stay of this STA grant with the FCC, and these filings remain pending.

     American  Mobile  is  authorized  to  build,   launch,  and  operate  three
geosynchronous  satellites  in  accordance  with a specific  schedule.  American
Mobile is not in compliance with the schedule for  commencement and construction
of its second and third satellites and has petitioned the FCC for changes to the
schedule.  Certain  of these  extension  requests  have  been  opposed  by third
parties.  The FCC has not acted on American Mobile's  requests.  The FCC has the
authority to revoke the  authorizations  for the second and third satellites and
in  connection  with such  revocation  could  exercise its  authority to rescind
American  Mobile's  license.  American Mobile believes that the exercise of such
authority to rescind the license is  unlikely.  The term of the license for each
of American  Mobile's three authorized  satellites is ten years,  beginning when
American  Mobile  certifies  that  the  respective  satellite  is  operating  in
compliance  with American  Mobile's  license.  The ten-year term of MSAT-2 began
August 21, 1995. Although American Mobile anticipates that the authorization for
MSAT-2 is likely to be extended in due course to  correspond  to the useful life
of the satellite and a new license granted for any replacement satellites, there
is no assurance of such extension or grants.

7. Commitments and Contingencies

     At September 30, 1999, the Company had remaining contractual commitments to
purchase both mobile data terminal  inventory and mobile telephone  inventory in
the maximum amount of $4.0 million  during the remainder of 1999.  Additionally,
the  Company had  remaining  contractual  commitments  for the  development  and
production of certain next  generation  data  terminals of  approximately  $32.1
million,  subject to final pricing negotiations,  over a three-year period, with
delivery  starting in the fourth  quarter of 1999.  The Company has the right to
terminate  the research  and  development  and  inventory  commitment  by paying
cancellation  fees of between $1.0 million and $2.3  million,  depending on when
the termination option is exercised during the term of the contract. The Company
also has the  right  to  terminate  the  inventory  commitment  by  incurring  a
cancellation penalty representing a percentage of the unfulfilled portion of the
contract.  The Company has also  contracted for the purchase of $25.9 million of
next generation  wireless data terminals to be delivered  beginning in the third
quarter of 1999. The contract contains a 50% cancellation penalty.



<PAGE>


     XM Radio is also subject to certain commitments and contingencies. XM Radio
has a distribution  agreement with General Motors that will require  significant
expenditures in the future. Additionally, under its satellite contract, XM Radio
will incur  approximately  $541.3 million, of which $147.9 million has been paid
at  September  30,1999.  XM  Radio  also  has a  contract  for  the  design  and
development  of its  terrestrial  repeater  network  with  payments  under  this
contract expected to be approximately $115 million.  Additional information with
respect to these  contractual  commitments is provided in XM Radio's filings and
periodic reports with the SEC.

     In January 1999, a competitor of XM Radio filed an action  against XM Radio
for patent  infringement.  In  February  1999,  XM Radio  filed an answer to the
action. XM Radio does not believe that it has infringed, and it believes that it
will not  infringe  any of the  competitor's  patents and intends to  vigorously
defend against the suit; however, the outcome is uncertain at this time.

8. Condensed Consolidating Financial Statements

     In connection with the Company's  acquisition of ARDIS Company on March 31,
1998 (the  "ARDIS  Acquisition")  and related  financing  discussed  above,  the
Company  formed  AMSC   Acquisition.   The  Company   contributed   all  of  its
inter-company notes receivables and transferred its rights,  title and interests
in AMSC Subsidiary Corporation, American Mobile Satellite Sales Corporation, and
AMSC Sales Corp.  Ltd.  (together with ARDIS,  the  "Subsidiary  Guarantors") to
Acquisition  Company,  and Acquisition Company was the acquirer of ARDIS and the
issuer of the Senior Notes.  American Mobile  Satellite  Corporation  ("American
Mobile  Parent") is a guarantor of the Senior  Notes.  The Senior Notes  contain
covenants that, among other things, limit the ability of Acquisition Company and
its Subsidiaries to incur additional  indebtedness,  pay dividends or make other
distributions,  repurchase any capital stock or subordinated indebtedness,  make
certain investments,  create certain liens, enter into certain transactions with
affiliates,  sell assets,  enter into certain  mergers and  consolidations,  and
enter into sale and leaseback transactions.

     The $335 million of Senior Notes are jointly and severally  guaranteed on a
full and  unconditional  basis by the Subsidiary  Guarantors and American Mobile
Parent. The following  unaudited condensed  consolidating  information for these
entities presents:

 o   Condensed  consolidating  balance  sheets  as of  September  30,  1999  and
     December 31, 1998, the condensed consolidating statements of operations for
     the three and nine month periods ended September 30, 1999 and 1998, and the
     condensed  consolidating  cash  flows  for the  nine  month  period  ending
     September 30, 1999 and 1998.

o    Elimination  entries necessary to combine the entities  comprising American
     Mobile.



<PAGE>

                                       Condensed Consolidating Balance Sheet
                                             As of September 30, 1999
                                                    (Unaudited)
                                                  (In Thousands)

<TABLE>
<CAPTION>


                                                                      Consolidated  American
                                 Subsidiary  Acquisition               Acquisition    Mobile                         Consolidated
                                 Guarantors   Company    Eliminations   Company      Parent   XM Radio  Eliminations     Parent
                                 ----------   -------    ------------   -------      ------   --------  ------------     ------
                                                                                       ASSETS
                                                                                       ------
CURRENT ASSETS:
<S>                               <C>        <C>           <C>         <C>          <C>          <C>         <C>          <C>
 Cash and cash equivalents          $7,075   $      --     $     --      $7,075     $     --      $54,356     $     --     $61,431
 Inventory                          19,597          --           --      19,597           --           --           --      19,597
 Prepaid in-orbit insurance          4,830          --           --       4,830           --           --           --       4,830
 Accounts receivable-- net          18,062          --           --      18,062           --           --           --      18,062
 Restricted short-term
   investments                          --      41,038           --      41,038           --           --           --      41,038
 Note receivable from XM
   Radio, at fair value                 --          --           --          --       13,038           --      (13,038)         --
 Other current assets                8,291          --           --       8,291        2,446        6,664           --      17,401
                                     -----      ------       ------      ------        -----        -----      --------     ------
       Total current assets         57,855      41,038           --      98,893       15,484       61,020      (13,038)    162,359
PROPERTY AND EQUIPMENT-- NET       232,800          --      (13,475)    219,325           --        1,153           --     220,478
SYSTEM UNDER CONSTRUCTION               --          --           --          --           --      282,316       (2,767)    279,549
GOODWILL & INTANGIBLES-- NET        51,461          --           --      51,461           --       50,823      (16,751)     85,533
INVESTMENT IN XM RADIO                  --          --           --          --       29,179           --      (29,179)         --
NOTE RECEIVABLE FROM XM RADIO           --          --           --          --       83,720           --      (83,720)         --
INVESTMENT IN/DUE FROM
 SUBSIDIARY                             --     292,515     (292,515)         --         (184)          --          184          --
DEFERRED CHARGES AND OTHER
 ASSETS-- NET                        3,016      29,696           --      32,712      (12,476)      11,504           --      31,740
RESTRICTED INVESTMENTS                  68      37,620           --      37,688       12,620           --           --      50,308
                                  --------      ------     --------      ------       ------      -------     --------      ------
       Total assets               $345,200     $400,869   ($305,990)   $440,079     $128,343     $406,816    ($145,271)   $829,967
                                  ========   ==========    ========    ========      ========     ========   ==========   ========


</TABLE>


<TABLE>
<CAPTION>
                                                                  LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)
                                                                  ----------------------------------------------
CURRENT LIABILITIES:
<S>                               <C>        <C>          <C>          <C>          <C>          <C>         <C>          <C>
 Accounts payable and
   accrued  expenses               $18,250     $20,891     $     --    $ 39,141     $    706     $ 18,943     $     --    $ 58,790
 Obligations under capital
   leases due within one year        2,747          --           --       2,747           --          107           --       2,854
 Current portion long-term  debt     7,809          --           --       7,809           --           --           --       7,809
                                     -----     -------        -----       -----        -----       ------        -----       -----
       Total current liabilities    28,806      20,891           --      49,697          706       19,050           --      69,453
DUE TO PARENT/AFFILIATE            755,641          --     (755,814)       (173)       6,618          173       (6,618)         --
LONG-TERM LIABILITIES:
 Note payable to/from Issuer/Parent     --      14,000           --      14,000      (14,000)          --           --          --
 Obligations under Bank Financing       --      31,000           --      31,000       41,000           --           --      72,000
 Senior Notes, net of discount          --     327,351           --     327,351           --           --           --     327,351
 Series A subordinated
   convertible notes                    --          --           --          --           --      256,258           --     256,258
 Other long-term debt                2,439          --           --       2,439       15,187           --           --      17,626
 Capital lease obligations           4,725          --           --       4,725           --          309           --       5,034
 Net assets acquired in excess
   of purchase price                 1,507          --           --       1,507           --           --           --       1,507
Convertible Note payable                --          --           --          --           --      106,693     (106,693)         --
 Other long-term liabilities         1,906          --           --       1,906           --           --           --       1,906
                                     -----     -------       ------       -----      -------     --------      --------    -------
       Total long-term liabilities  10,577     372,351           --     382,928       42,187      363,260     (106,693)    681,682
        Total liabilities          795,024     393,242     (755,814)    432,511       49,518      382,483     (113,311)    751,135
                                   -------    ---------      ------     -------       ------      -------      --------    -------
STOCKHOLDERS' EQUITY (DEFICIT)    (449,824)      7,627      449,824       7,627       78,832       24,333      (31,960)     78,832
                                  ---------   ---------     -------       -----      -------       ------      --------     ------
       Total liabilities and
          stockholders' equity
          (deficit)               $345,200    $400,869    ($305,990)   $440,079     $128,343     $406,816    ($145,271)   $829,967
                                  ========   ==========    ========    ========     ========     ========    ==========   ========


</TABLE>



<PAGE>



                                         Condensed Consolidating Balance Sheet
                                               As of December 31, 1998
                                                      (Unaudited)
                                                    (In Thousands)

<TABLE>
<CAPTION>

                                                                              Consolidated   American
                                     Subsidiary    Acquisition                Acquisition     Mobile                  Consolidated
                                     Guarantors      Company     Eliminations   Company       Parent    Eliminations      Parent
                                     ----------      -------     ------------   -------       ------    ------------      ------

                                                                          ASSETS
                                                                          ------

CURRENT ASSETS:
<S>                                      <C>      <C>            <C>           <C>            <C>         <C>           <C>
 Cash and cash equivalents               $2,285   $     --       $      --     $  2,285       $    --     $      --       $2,285
 Inventory                               18,593         --              --       18,593            --            --       18,593
 Prepaid in-orbit insurance               3,381         --              --        3,381            --            --        3,381
 Accounts receivable-- net               15,325         --              --       15,325            --            --       15,325
 Restricted short-term  investments          --     41,038              --       41,038            --            --       41,038
 Other current assets                     7,192         20              --        7,212         6,019            --       13,231
                                         ------     ------         -------      -------         -----        ------       ------
       Total current assets              46,776     41,058              --       87,834         6,019            --       93,853
PROPERTY AND EQUIPMENT-- NET            261,607         --         (15,054)     246,553            --            --      246,553
GOODWILL & INTANGIBLES-- NET             53,235         --              --       53,235            --            --       53,235
INVESTMENT IN/DUE FROM
 SUBSIDIARY                                  --    304,192        (304,192)          --        63,787      (63,787)           --
DEFERRED CHARGES AND OTHER
 ASSETS-- NET                               386     33,460              --       33,846        (4,892)          --        28,954
RESTRICTED INVESTMENTS                    1,500     54,939              --       56,439        10,760           --        67,199
                                       --------   --------       ---------     --------       -------     --------      --------
       Total assets                    $363,504   $433,649       ($319,246)    $477,907       $75,674     ($63,787)     $489,794
                                       ========   ========       =========     ========       =======     =========     ========
</TABLE>



<TABLE>
<CAPTION>


                                                          LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)
                                                          ----------------------------------------------


CURRENT LIABILITIES:
<S>                                     <C>        <C>           <C>           <C>           <C>          <C>           <C>
Accounts payable and accrued expenses   $23,003    $10,715       $      --      $33,718           $79     $     --       $33,797
Obligations under capital leases due
 within one year                          5,971         --              --        5,971            --           --         5,971
Current portion long-term debt            5,041         --              --        5,041            --           --         5,041
Other current liabilities                   162         --              --          162            --           --           162
                                         ------     ------        --------      -------       -------      -------        ------
       Total current liabilities         34,177     10,715              --       44,892            79           --        44,971
DUE TO PARENT/AFFILIATE                 681,029         --        (681,029)          --            --           --            --
LONG-TERM LIABILITIES:
 Obligations under New Bank Financing        --     32,000              --       32,000       100,000           --       132,000
 Senior Notes, net of  discount              --    327,147              --      327,147            --           --       327,147
 Other long-term debt                     1,689         --              --        1,689                         --         1,689
 Capital lease obligations                5,824         --              --        5,824            --           --         5,824
 Net assets acquired in excess
     of purchase price                    2,028         --              --        2,028            --           --         2,028
 Investment in XM Radio                      --         --              --           --        12,618           --        12,618
 Other long-term liabilities                540         --              --          540            --           --           540
                                         ------    -------        --------      -------       -------      -------       -------
       Total long-term liabilities       10,081    359,147              --      369,228       112,618           --       481,846
       Total liabilities                725,287    369,862        (681,029)     414,120       112,697           --       526,817
STOCKHOLDERS' EQUITY (DEFICIT)         (361,783)    63,787         361,783       63,787       (37,023)     (63,787)      (37,023)
                                       ---------   -------        --------      -------       --------     --------      -------
  Total liabilities and
    stockholders' equity (deficit)     $363,504   $433,649       ($319,246)    $477,907       $75,674     ($63,787)     $489,794
                                       ========   ========        ========     ========       =======      =======      ========

</TABLE>



<PAGE>


                                 Condensed Consolidating Statement of Operations
                                       Three Months Ended September 30, 1999
                                                   (Unaudited)
                                                  (In Thousands)
<TABLE>
<CAPTION>


                                                                      Consolidated  American
                                 Subsidiary  Acquisition               Acquisition    Mobile                         Consolidated
                                 Guarantors   Company    Eliminations   Company      Parent   XM Radio  Eliminations     Parent
                                 ----------   -------    ------------   -------      ------   --------  ------------     ------

REVENUES
<S>                               <C>        <C>           <C>         <C>          <C>       <C>          <C>          <C>
 Services                         $17,290    $    ---      $    ---    $17,290        $300    $   ---       ($300)       $17,290
 Sales of equipment                 5,680         ---           ---      5,680         ---        ---         ---          5,680
                                  -------    --------      --------    -------      ------    -------        -----       -------
 Total Revenues                    22,970         ---           ---     22,970         300        ---        (300)        22,970

COSTS AND EXPENSES
 Cost of service and operations    17,287         ---           ---     17,287         ---        ---         ---         17,287
 Cost of equipment sold             6,045         ---           ---      6,045         ---        ---         ---          6,045
 Sales and advertising              5,524         ---           ---      5,524          24        ---         ---          5,548
 General and administrative         4,316         339           ---      4,655         258      8,506        (300)        13,119
 Depreciation and amortization     14,794         ---          (526)    14,268         ---        865        (222)        14,911
                                  -------       -----        ------     ------       -----      -----      ------        -------
 Operating Loss                   (24,996)       (339)          526    (24,809)         18     (9,371)        222        (33,940)

INTEREST AND OTHER INCOME              85       4,883        (3,885)     1,083       2,651        854      (3,598)           990

UNREALIZED LOSS ON NOTE
PAYABLE TO RELATED PARTY              ---         ---           ---        ---      (2,807)       ---         ---         (2,807)

EQUITY IN LOSS OF
 SUBSIDIARIES                         ---     (29,437)       29,437        ---     (54,407)       ---      54,407            ---

INTEREST EXPENSE                   (4,526)    (12,638)        3,885    (13,279)     (2,324)    (8,885)      6,352        (18,136)
                                   -------    --------       ------    --------    --------    -------     ------        --------

LOSS BEFORE EXTRAORDINARY
ITEM                              (29,437)    (37,531)       29,963    (37,005)    (56,869)   (17,402)     57,383        (53,893)

EXTRAORDINARY LOSS ON
EXTINGUISHMENT ON DEBT                ---         ---           ---        ---     (12,132)       ---         ---        (12,132)
                                   ------     -------        ------    -------     --------   --------     ------        --------

NET LOSS                         ($29,437)   ($37,531)      $29,963   ($37,005)   ($69,001)  ($17,402)    $57,383       ($66,025)
                                  =======     =======       =======    =======     =======    =======     =======        =======

</TABLE>


<PAGE>
                                 Condensed Consolidating Statement of Operations
                                       Three Months Ended September 30, 1998
                                                    (Unaudited)
                                                  (In Thousands)

<TABLE>
<CAPTION>


                                                                              Consolidated   American
                                     Subsidiary    Acquisition                Acquisition     Mobile                  Consolidated
                                     Guarantors      Company     Eliminations   Company       Parent    Eliminations      Parent
                                     ----------      -------     ------------   -------       ------    ------------      ------


REVENUES
<S>                                    <C>          <C>              <C>        <C>        <C>           <C>            <C>
 Services                              $17,823      $     --         ($162)     $17,661        $300        ($300)        $17,661
 Sales of equipment                      4,141            --            --        4,141          --           --           4,141
                                         -----          ----         -----        -----        ----         ----           -----
 Total Revenues                         21,964            --          (162)      21,802         300         (300)         21,802

COSTS AND EXPENSES
 Cost of service and operations         15,707            --          (162)      15,545          --           --          15,545
 Cost of equipment sold                  4,826            --            --        4,826          --           --           4,826
 Sales and advertising                   5,364            --            --        5,364          65           --           5,429
 General and administrative              4,514            42            --        4,556         258         (300)          4,514
 Depreciation and amortization          14,391            --          (527)      13,864          --           --          13,864
                                        ------         -----         -----       ------      ------         -----         ------
 Operating Loss                        (22,838)          (42)          527      (22,353)        (23)          --         (22,376)

INTEREST AND OTHER INCOME                   71         5,312        (3,886)       1,497          85           --           1,582

EQUITY IN LOSS OF
 SUBSIDIARIES                               --        (4,827)        4,827           --     (36,828)       33,742         (3,086)

INTEREST EXPENSE                        (4,828)      (11,090)        3,032      (12,886)     (2,618)          --         (15,504)
                                        -------      --------       -------     --------     -------          --         --------

NET LOSS                              ($27,595)     ($10,647)       $4,500     ($33,742)   ($39,384)     $33,742        ($39,384)
                                      =========     =========       ======     =========   =========     =======        =========


</TABLE>

<PAGE>
<TABLE>


                                 Condensed Consolidating Statement of Operations
                                  For the Nine Months ended September 30, 1999
                                                    (Unaudited)
                                                  (In Thousands)

<CAPTION>


                                                                      Consolidated  American
                                 Subsidiary  Acquisition               Acquisition    Mobile                          Consolidated
                                 Guarantors   Company    Eliminations   Company      Parent   XM Radio  Eliminations     Parent
                                 ----------   -------    ------------   -------      ------   --------  ------------     ------

REVENUES
<S>                              <C>         <C>           <C>       <C>          <C>          <C>        <C>           <C>
 Services                         $50,076    $    --       $      --   $50,076      $  900       $   --      ($900)      $50,076
 Sales of equipment                15,997         --              --    15,997          --           --         --        15,997
                                   ------      -----        --------    ------      ------        ------    -------      -------
 Total Revenue                     66,073         --              --    66,073         900           --       (900)       66,073

COSTS AND EXPENSES
 Cost of service
  and operations                   51,673         --              --    51,673          --           --         --         51,673
 Cost of equipment                 17,167         --              --    17,167          --           --         --         17,167
 Sales and Advertising             15,893         --              --    15,893         125           --         --         16,018
 General and Administrative        13,355      1,030              --    14,385         605        8,506       (900)        22,596
 Depreciation and amortization     43,251         --          (1,579)   41,672          --          865       (222)        42,315
                                   ------      -----          -------   ------       -----        -----       -----        ------
Operating Loss                    (75,266)    (1,030)          1,579   (74,717)        170       (9,371)       222        (83,696)


INTEREST AND OTHER INCOME             257     14,695         (11,530)    3,422       3,944          854     (3,598)         4,622

UNREALIZED LOSS ON NOTE
RECEIVABLE FROM XM RADIO               --         --              --        --      (9,919)          --         --         (9,919)

UNREALIZED GAIN ON NOTE
PAYABLE TO RELATED PARTY               --         --              --        --       7,229           --         --          7,229

EQUITY IN LOSS OF SUBSIDIARIES         --    (88,041)         88,041        --    (135,208)          --    128,516         (6,692)

INTEREST EXPENSE                  (13,032)   (38,317)         11,530   (39,819)     (8,605)      (8,885)     6,352        (50,957)
                                  --------   --------         ------   --------    --------      -------   -------        --------

LOSS BEFORE EXTRAORDINARY         (88,041)  (112,693)         89,620  (111,114)   (142,389)     (17,402)   131,492       (139,413)
ITEM

EXTRAORDINARY LOSS ON
EXTINGUISHMENT OF DEBT                 --         --              --        --     (12,132)          --         --        (12,132)
                                  -------    -------          ------   -------     --------      -------    ------        --------

NET LOSS                         ($88,041)  ($112,693)       $89,620 ($111,114)  ($154,521)    ($17,402)  $131,492      ($151,545)
                                 =========  ==========       ======= ==========  ==========    =========  ========      ==========
</TABLE>

<PAGE>


                                 Condensed Consolidating Statement of Operations
                                  For the Nine Months ended September 30, 1998
                                                    (Unaudited)
                                                  (In Thousands)



<TABLE>
<CAPTION>

                                                                              Consolidated   American
                                     Subsidiary    Acquisition                Acquisition     Mobile                  Consolidated
                                     Guarantors      Company     Eliminations   Company       Parent    Eliminations      Parent
                                     ----------      -------     ------------   -------       ------    ------------      ------

REVENUES
<S>                                  <C>           <C>            <C>          <C>         <C>             <C>        <C>
 Services                             $42,864       $    --       ($2,115)      $40,749       $  900          ($900)     $40,749
 Sales of equipment                    13,485            --            --        13,485           --             --       13,485
                                       ------         -----        ------        ------         ----           ----       ------
 Total Revenues                        56,349            --        (2,115)       54,234          900           (900)      54,234

COSTS AND EXPENSES
 Cost of service and operations        39,813            --          (315)       39,498           --             --       39,498
 Cost of equipment sold                14,122            --            --        14,122           --             --       14,122
 Sales and advertising                 13,743            --            --        13,743          116             (4)      13,855
 General and administrative            15,751            71        (1,800)       14,022          791           (895)      13,918
 Depreciation and amortization         40,064            --        (1,054)       39,010         (525)            (1)      38,484
                                       ------        ------        -------       ------        -----          -----      ------
 Operating Loss                       (67,144)          (71)        1,054       (66,161)         518             --      (65,643)

INTEREST AND OTHER INCOME                 277        10,581        (7,729)        3,129        7,389         (7,188)       3,330

EQUITY IN LOSS OF
SUBSIDIARIES                               --       (67,847)       67,847            --     (112,154)       102,536       (9,618)

INTEREST EXPENSE                      (23,748)      (22,073)        6,317       (39,504)      (5,532)         7,188      (37,848)
                                      --------      --------        -----       --------      -------         -----      --------
NET LOSS                             ($90,615)     ($79,410)      $67,489     ($102,536)   ($109,779)      $102,536    ($109,779)
                                     =========     =========      ========    ==========   ==========      ========    ==========
</TABLE>




<PAGE>

<TABLE>


                                 Condensed Consolidating Statements of Cash Flow
                                       Nine Months Ended September 30, 1999
                                                    (Unaudited)
                                                  (In thousands)
<CAPTION>

                                                                      Consolidated  American
                                 Subsidiary  Acquisition               Acquisition    Mobile                         Consolidated
                                 Guarantors   Company    Eliminations   Company      Parent   XM Radio  Eliminations     Parent
                                 ----------   -------    ------------   -------      ------   --------  ------------     ------

CASH FLOWS FROM OPERATING ACTIVITIES:
<S>                              <C>         <C>           <C>         <C>        <C>         <C>        <C>          <C>
Net loss                         ($88,041)   ($112,693)    $89,620     ($111,114) ($154,521)  ($17,402)  $131,492     ($151,545)
Adjustments to reconcile
  net loss to net cash
  (used in) provided by
  operating activities:
  Amortization of
    Guarantee Warrants and
    debt related costs                 --        5,823          --         5,823      6,850        478         --        13,151
  Depreciation and
    amortization                   41,673           --          --        41,673         --        642         --        42,315
  Extraordinary loss
    on extinguishment of debt          --           --          --            --     12,132         --         --        12,132
  Equity in loss in XM Radio           --           --          --            --      6,692         --         --         6,692
  Net unrealized loss on
    marketable securities              --           --          --            --      2,690         --         --         2,690
  Changes in assets/liabilities
    Inventory                      (1,004)          --          --        (1,004)        --         --         --        (1,004)
    Prepaid in-orbit insurance     (1,449)          --          --        (1,449)        --         --         --        (1,449)
    Trade accounts receivable      (5,395)          --          --        (5,395)        --                    --        (5,395)
    Other current assets           (7,618)          20          --        (7,598)     3,573     (3,604)        --        (7,629)
    Accounts payable and
    accrued  expenses             (30,315)      37,485          --         7,170        706    (17,654)        --        (9,778)
    Accrued interest on
      Senior Notes                     --       20,519          --        20,519         --         --         --        20,519
    Deferred trade payables           975           --          --           975         --         --         --           975
    Deferred Items--net             1,423           --          --         1,423     (1,030)        --         --           393
                                    -----     --------     --------        -----     -------   -------      ------       ------
  Net cash (used in) provided
    by operating activities       (89,751)     (48,846)     89,620       (48,977)  (122,908)   (37,540)   131,492       (77,933)

CASH FLOWS FROM INVESTING
  ACTIVITIES:
  Additions to property &
    equipment                      (9,730)          --          --        (9,730)        --       (198)        --        (9,928)
  System under construction            --           --          --            --         --    (75,579)        --       (75,579)
  Purchase of XM Radio note
    receivable                         --           --          --            --    (21,419)        --         --       (21,419)
  XM Radio Acquisition costs           --           --          --            --       (951)       163                     (788)
  Purchase of long-term,
    restricted investments           (536)      (1,217)         --        (1,753)    (1,860)        --         --        (3,613)
                                     -----      -------      ------       -------    -------   -------      -----        -------
  Net cash used in investing
  activities                      (10,266)      (1,217)         --       (11,483)   (24,230)   (75,614)        --      (111,327)


CASH FLOWS FROM FINANCING
  ACTIVITIES:
  Common Stock                         --           --          --            --    121,974         --         --       121,974
  Funding from parent/subsidiary  110,089       51,063     (89,620)       71,532     56,984      2,976   (131,492)           --
  Principal payments under
    capital leases                 (4,421)          --          --        (4,421)        --         --         --        (4,421)
  Principal payments under
  Vendor Financing                   (861)          --          --          (861)        --         --         --          (861)
  Proceeds from bank financing         --       52,000          --        52,000         --         --         --        52,000
 Proceeds from Series A
    subordinated
    convertible notes                  --           --          --            --         --    250,000         --       250,000
  Repayments on Revolver               --      (53,000)         --       (53,000)        --         --         --       (53,000)
  Repayment of term loan               --           --          --            --    (59,000)        --         --       (59,000)
  Repayment on XM Radio
    bank loan                          --           --          --            --         --        (73)        --           (73)
  Repayment of WorldSpace loan         --           --          --            --         --    (75,000)        --       (75,000)
  Proceeds from reduction of
    interest rate swap                 --           --          --            --      6,009         --         --         6,009
  Proceeds from note payable
    to related party                   --           --          --            --     21,500         --         --        21,500
  Debt issuance costs                  --           --          --            --       (329)   (10,393)        --       (10,722)
                                  -------       ------     -------        ------      ------   -------    --------      --------
Net cash provided by
  (used in) financing activities  104,807       50,063     (89,620)       65,250    147,138    167,510   (131,492)      248,406
Net increase in cash and
  cash equivalents                  4,790           --          --         4,790         --     54,356         --        59,146

CASH & CASH EQUIVALENTS,
  beginning of period               2,285           --          --         2,285         --         --         --         2,285
                                    -----         -----     -------        -----    -------    --------   --------        -----
CASH & CASH EQUIVALENTS,
  end of period                    $7,075    $      --      $   --        $7,075    $    --    $54,356    $    --       $61,431
                                   ======     ========      ======        ======     ======    =======     =======      =======

</TABLE>


<PAGE>




                                 Condensed Consolidating Statements of Cash Flow
                                      Nine Months Ended September 30, 1998
                                                   (Unaudited)
                                                  (In Thousands)
<TABLE>
<CAPTION>


                                                                              Consolidated   American
                                     Subsidiary    Acquisition                Acquisition     Mobile                  Consolidated
                                     Guarantors      Company     Eliminations   Company       Parent    Eliminations      Parent
                                     ----------      -------     ------------   -------       ------    ------------      ------


CASH FLOWS FROM OPERATING ACTIVITIES:
<S>                                   <C>           <C>           <C>         <C>           <C>           <C>           <C>
Net Loss                              ($90,615)     ($79,410)     $67,489     ($102,536)    ($109,779)    $102,536      ($109,779)
Adjustments to reconcile net
  loss to net cash used in
  operating activities:
  Amortization of guarantee
    warrants, debt discount
    and issuance costs                   2,524         5,548           --         8,072         3,550           --         11,622
  Depreciation and amortization         40,063            --       (1,053)       39,010          (526)          --         38,484
  Equity in loss in XM Radio                --            --           --            --         9,618           --          9,618
  Changes in assets & liabilities
     Inventory                           3,938            --           --         3,938            --           --          3,938
    Prepaid in-orbit insurance            (266)           --           --          (266)           --           --           (266)
    Accounts receivable-- trade          2,126            --           --         2,126            --           --          2,126
    Other current assets               (40,982)       41,066           --            84           197           --            281
    Accounts payable and accrued
     expenses                          (12,977)          390           --       (12,587)           29           --        (12,558)
    Accrued interest on
     Senior Notes                           --        20,519           --        20,519            --           --         20,519
    Deferred trade payables             (5,330)           --           --        (5,330)           --           --         (5,330)
    Deferred Items-- net                     6            --           --             6            --           --              6
                                        ------       -------       ------       -------       -------        -----        -------
  Net cash used in operations         (101,513)      (11,887)      66,436       (46,964)      (96,911)     102,536        (41,339)

CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property & equipment       (7,376)           --           --        (7,376)           --           --         (7,376)
Cash paid for acquisition of ARDIS          --       (51,440)          --       (51,440)           --           --        (51,440)
Purchase of long-term,
    restricted investments                  --      (115,159)          --      (115,159)      (28,153)          --       (143,312)
                                       --------     ---------      -------      ---------     --------      -------      ---------
  Net cash used in
    investing activities                (7,376)     (166,599)          --      (173,975)      (28,153)          --       (202,128)

CASH FLOWS FROM FINANCING ACTIVITIES:
  Proceeds from issuance of
    Common Stock                            --            --           --            --           412           --            412
  Funding from parent                  222,852      (178,532)     (66,436)      (22,116)      124,652     (102,536)            --
  Principal payments under
    capital leases                      (2,541)           --           --        (2,541)           --           --         (2,541)
  Proceeds from bank financing           2,000        37,000           --        39,000            --           --         39,000
  Repayment of bank financing         (100,000)           --           --      (100,000)           --           --       (100,000)
  Payments on long-term debt            (4,933)           --           --        (4,933)           --           --         (4,933)
  Debt issuance costs                       --       (14,982)          --       (14,982)           --           --        (14,982)
  Proceeds from Notes and
    stock purchase warrants                 --       335,000           --        335,000           --           --        335,000
                                       -------       -------      --------       -------         ------       ------      -------
  Net cash provided by
    financing activities               117,378       178,486      (66,436)       229,428      125,064     (102,536)       251,956
Net increase in cash and cash
    equivalents                          8,489            --           --          8,489           --           --          8,489
CASH & CASH EQUIVALENTS,
    beginning of period                  2,106            --           --          2,106           --           --          2,106
                                         -----        ------       ------          -----      -------       ------          -----
CASH & CASH EQUIVALENTS, end of
  period                               $10,595       $    --      $   --         $10,595      $    --      $    --        $10,595
                                       =======       ========     ========       =======      ========     ========       =======

</TABLE>


<PAGE>




9. Subsequent Events

XM Radio Initial Public Offering

     On October 8, 1999, XM Radio  completed its initial public offering of 10.2
million shares of Class A Common Stock.  The initial  public  offering price was
$12 per share. The Company  purchased  200,000 shares of XM Radio Class A Common
Stock from the  underwriters at the IPO price of $12 per share.  Upon completion
of  the  offering,   all  of  the  Company's   convertible  notes  of  XM  Radio
automatically converted into approximately 11 million shares of XM Radio Class B
common stock. Class B shares have three-for-one voting rights. Additionally, the
$250 million Series A convertible notes of XM Radio converted into approximately
10.8 million shares of Series A convertible  preferred  stock and  approximately
16.2 million  shares of Class A common stock at a conversion  price of $9.52 per
share.

     After conversion of the above notes and the purchase of the 200,000 shares,
the Company's  voting interest in XM Radio was reduced to  approximately  62.3%,
while its equity  interest  was  reduced to  approximately  30.5% (in each case,
excluding  shares of XM Radio  Class B stock owned by the Company but pledged to
Baron Asset Fund in connection with the Baron XM Radio  Convertible  Note).  The
Company will continue to consolidate XM Radio's  financial results with those of
the Company until the Company's Class B stock is converted into Class A stock of
XM Radio in accordance with certain contractual provisions, and the FCC approves
the change of control of XM Radio  from  American  Mobile to a diffuse  group of
stockholders.

     In accordance with Staff Accounting  Bulletin 51 (SAB 51), the Company will
record an increase to its  investment in XM Radio in the fourth quarter of 1999.
SAB 51 addresses the accounting  for sales of stock by a subsidiary.  Because XM
Radio is a development stage Company, SAB 51 requires that the difference in the
carrying  amount of the parent's  investment in the  subsidiary and the net book
value of the  subsidiary  after the stock issuance be reflected in the financial
statements of the parent as a capital transaction.




<PAGE>



PART I-FINANCIAL INFORMATION

     Item 2.  Management's  Discussion  and Analysis of Financial  Condition and
Results of Operations

     This Quarterly  Report on Form 10-Q includes  "forward-looking  statements"
within the meaning of Section 27A of the  Securities Act of 1933 and Section 21E
of the Securities  Exchange Act of 1934.  Such  statements are identified by the
use of  forward-looking  words  or  phrases,  including,  but  not  limited  to,
"believe,"  "intend" "will be positioned,"  "will," "may," "project,"  "expect,"
"expected,"  "estimate,"  "anticipate" and "anticipated." These  forward-looking
statements are based on the Company's current expectations. All statements other
than statements of historical facts included in this Quarterly Report, including
those  regarding  the  Company's  and XM Radio's  financial  position,  business
strategy,  projected  costs and  financing  needs,  and plans and  objectives of
management for future operations, are forward-looking  statements.  Although the
Company  believes  that  the  expectations  reflected  in  such  forward-looking
statements are reasonable, there can be no assurance that such expectations will
prove to have been correct. Because forward-looking statements involve risks and
uncertainties,  the  Company's  and  XM  Radio's  actual  results  could  differ
materially. These forward-looking statements represent the Company's judgment as
of the date  hereof and  readers are  cautioned  not to place undue  reliance on
these  forward-looking  statements.  Important  factors  that could cause actual
results  to  differ  materially  from the  Company's  expectations  ("Cautionary
Statements")  are disclosed under "Overview and Factors  Affecting the Company's
Results," and elsewhere in this Quarterly Report, including, without limitation,
in conjunction with the  forward-looking  statements  included in this Quarterly
Report. All subsequent written and oral forward-looking  statements attributable
to the  Company  or  persons  acting  on  behalf of the  Company  are  expressly
qualified in their  entirety by the Cautionary  Statements.  Readers also should
carefully  review the risk factors  described in other reports and documents the
Company  files from time to time with the  Securities  and Exchange  Commission,
including  its Form 10-K  Annual  Report  filed on March 30,  1999 and Form 10-Q
Quarterly  Reports  to be filed by the  Company  subsequent  to this  Form  10-Q
Quarterly Report and any Current Reports on Form 8-K and registration statements
filed by the Company. In addition,  readers should carefully review the Form S-1
Registration  Statement (file No. 333-83619) of XM Satellite Radio Holdings Inc.
describing  the risk  factors  relating to its  business,  as well as XM Radio's
other reports filed from time to time with the SEC.

General

     The following discussion and analysis provides information which management
believes  is  relevant  to an  assessment  and  understanding  of the  financial
condition and consolidated  results of operations of the Company. The discussion
should  be  read  in  conjunction  with  the  condensed  consolidated  financial
statements and notes thereto.

     American  Mobile was formed in 1988 to  develop,  construct,  and operate a
mobile satellite services system.  With the launch of its satellite in 1995, the
Company  began to offer a full  range of mobile  voice  and data  communications
services via satellite to customers in North America. In March 1998, the Company
acquired ARDIS Company ("ARDIS") from Motorola,  Inc. for $100 million. With the
acquisition  of ARDIS,  the Company  acquired the nation's  largest,  most fully



<PAGE>


deployed  terrestrial  wireless  data  network,  and now offers a broad range of
wireless  communications  services using an integrated network consisting of the
ARDIS   terrestrial   network   (the  "ARDIS   Network")   and  a  satellite  in
geosynchronous  orbit (the  "Satellite  Network,"  and,  together with the ARDIS
Network, the "Network").

     On July 7, 1999 the Company acquired WorldSpace's debt and equity interests
in XM Radio,  other than a $75  million  loan from  WorldSpace  to XM Radio,  in
exchange for approximately 8.6 million shares of the Company's common stock. The
operating  results of XM Radio have been included in the consolidated  condensed
financial statements for the period July 7, 1999 through September 30, 1999. The
consolidated  condensed  financial  statements for the prior year do not reflect
the operating  results of XM Radio. For all periods prior to the XM Acquisition,
the  Company's  investment  in XM Radio was accounted for pursuant to the equity
method  of  accounting.  As a result  of the XM  Acquisition,  the  Company  was
required,  in accordance  with  generally  accepted  accounting  principles,  to
restate its financial  statements  for the year ended December 31, 1998, and the
quarter ended March 31, 1999, to record its share of XM Radio losses  previously
suspended  under the equity method of  accounting.  This resulted in the Company
recording  additional  losses of approximately  $12.6 million for the year ended
December 31, 1998, and $3.5 million for the quarter ended March 31, 1999.

     On October 8, 1999, XM Radio consummated its initial public offering.  As a
result, the Company's voting interest in XM Radio is approximately  62.3%, while
its equity interest was diluted to approximately 30.5%.

     The Company and its consolidated  subsidiaries are parties to the following
financings  and  refinancings:  (1) $335  million of Senior  Notes due 2008 (the
"Senior  Notes");  (2) the $200 million  Revolving Credit Facility and Term Loan
Facility,  of which a portion has been permanently  reduced  (collectively,  the
"New Bank  Financings");  and (3) a $10 million vendor  financing  facility with
Motorola.

     In light of the significance of the acquisition of ARDIS in 1998 and the XM
Acquisition in 1999,  management believes the period to period comparison of the
Company's  financial  results are not  necessarily  meaningful and should not be
relied upon as an indication of future operating performance.

Overview and Factors Affecting the Company's Results

     The Company has incurred  significant  operating  losses and negative  cash
flows in each year since it  commenced  operations,  due  primarily  to start-up
costs,  the  costs  of  developing  and  building  its  Network  and the cost of
developing,  selling and providing  its products and services.  The Company has,
and will continue to have, substantial indebtedness.

     The Company's  future  operating  results could be adversely  affected by a
number of uncertainties and factors, including:

     o    the launch of new  products  or the entry  into new  market  segments,
          which  may  require  the  Company  to  continue  to incur  significant
          operating losses,


<PAGE>



     o    the  Company's  ability to gain market  acceptance of new products and
          services, including its new eLink(sm) wireless email service,

     o    the Company's  ability to respond and react to changes in its business
          and the industry as a result of having substantial indebtedness,


     o    the Company's  ability to fund its anticipated  capital  expenditures,
          operating  losses and debt  service  requirements  and its  ability to
          secure additional financing as may be necessary,


     o    the Company's ability to modify its organization, strategy and product
          mix to maximize the market opportunities in light of changes therein,

     o    the ability of the Company to manage growth effectively,

     o    competition  from  existing  companies  that  provide  services  using
          existing   communications   technologies   and  the   possibility   of
          competition from companies using new technology in the future,

     o    the ability of the Company to  maintain,  on  commercially  reasonable
          terms or at all, certain technologies licensed from third parties, the
          loss of one or more of the Company's key customers,


     o    the timely roll-out of certain key customer initiatives and products,


     o    the timely availability of an adequate supply of subscriber  equipment
          at competitive price points,


     o    regulation by the FCC,


     o    technical  anomalies  that may occur within the  Network,  which could
          impact, among other things, customer performance and satisfaction,  or
          the  operation  of the  Satellite  Network  and  the  cost,  scope  or
          availability of in-orbit insurance, and


      o   the ability of the Company to fully  realize the value of its tangible
          assets.

Additionally,  XM Radio is a development stage company with no revenues, and its
business is subject to a number of significant risks and uncertainties including
the following:

      o   the ability to obtain additional  financing  necessary to complete the
          build out of its system and maintain  operations until such time as it
          can reach cash flow positive,

      o   satellite launch failure, destruction or damage during launch,

      o   the ability of XM Radio to successfully integrate complex technologies
          into a technologically feasible configuration,

      o   the timely availability of XM Radios at competitive prices, and

      o   the ability of XM Radio to gain market acceptance of its service.

The foregoing risks may effect the Company's  investment in XM Radio.  The value
of the Company's  investment in XM Radio represents a significant portion of the
total assets of the Company and such value  fluctuates  with the market price of
XM Radio's stock.


<PAGE>

Results of Operations

     Quarter ended and nine month period ended September 30, 1999 and 1998

     Service  revenues,  which  includes  both  the  Company's  voice  and  data
services,  approximated $17.3 million and $50.1 million for the three months and
nine months ended  September 30, 1999,  respectively,  compared to $17.7 million
and $40.7 million during the same periods in 1998.
<TABLE>
<CAPTION>

        Summary of Revenue          Three Months Ended
                                       September 30,
        (in millions)                  1999    1998      Change   % Change
                                       ----    ----      ------   --------
<S>                                    <C>     <C>       <C>        <C>
        Voice Service                  $3.5    $3.9      ($0.4)     (10)%
        Data Service                   12.6    12.8       (0.2)      (2)
        Capacity Resellers & Other      1.2     1.0        0.2       20
        Equipment Sales                 5.7     4.1        1.6       39
</TABLE>



<TABLE>
<CAPTION>
        Summary of Revenue          Nine Months Ended
                                      September 30,
        (in millions)                1999    1998       Change    % Change
        -------------                ----    ----       ------    --------
<S>                                  <C>     <C>        <C>          <C>
        Voice Service                $9.7    $10.6      ($0.9)       (8)%
        Data Service                 36.9     27.3        9.6        35
        Capacity Resellers & Other    3.5      2.8        0.7        25
        Equipment Sales              16.0     13.5        2.5        19
</TABLE>

     The  decrease in service  revenue  from voice  services in both periods was
primarily a result of reduced  per-minute rates following the sale of the assets
of the Company's  maritime division,  in October 1998, to a reseller,  partially
offset by a 37%  increase  in voice  customers  in the first nine months of 1999
over the comparable  period in 1998.  While the Company's  total service revenue
increased  $9.4  million  from the first  nine  months of 1998 to the first nine
months of 1999, this increase was due principally to nine months of revenue from
ARDIS in 1999,  totaling $29.1 million,  versus six months of revenue from ARDIS
in 1998,  totaling  $20.3  million.  Overall  average  revenue per user ("ARPU")
declined year over year, and is expected to continue to do so, due to changes in
products and the subscriber mix.  Service revenue from capacity  resellers,  who
handle  both  voice  and data  services,  increased  primarily  as a  result  of
increased contract commitments from current customers.

     Revenue from the sale of subscriber  equipment  increased as a result of an
increase in the volume of products  sold,  offset by a lower  average  equipment
price per unit as compared to 1998.

<TABLE>
<CAPTION>

        Summary of Expenses
                                          Three Months
                                      Ended September 30,

        (in millions)                   1999     1998          Change   % Change
                                        ----     ----          ------   --------
<S>                                    <C>      <C>            <C>          <C>
        Cost of Service & Operations   $17.3    $15.5          $1.8         12%
        Cost of Equipment Sales          6.0      4.8           1.2         25
        Sales & Advertising              5.5      5.4           0.1          2
        General & Administrative        13.1      4.5           8.6        191
        Depreciation & Amortization     14.9     13.9           1.0          7

</TABLE>

<PAGE>
<TABLE>
<CAPTION>

        Summary of Expenses
                                          Nine Months
                                      Ended September 30,
        (in millions)                    1999    1998       Change    % Change
                                         ----    ----       ------    --------
<S>                                     <C>     <C>         <C>          <C>
        Cost of Service & Operations    $51.7   $39.5       $12.2        31%
        Cost of Equipment Sales          17.2    14.1         3.1        22
        Sales & Advertising              16.0    13.8         2.2        16
        General & Administrative         22.6    13.9         8.7        63
        Depreciation & Amortization      42.3    38.5         3.8        10
</TABLE>

As of January 1999,  as a result of the  completion  of the  integration  of the
ARDIS  acquisition and the  achievement of certain  related cost synergies,  the
Company ceased to report separate company  information for ARDIS.  Consequently,
ARDIS costs are no longer  distinguished  from those of the remaining  business,
and,  therefore the discussion of the three and nine months ended  September 30,
1999 reflects the costs of the consolidated entity.

     Cost of  service  and  operations  for the  three  and  nine  months  ended
September 30, 1999,  which includes costs to support  subscribers and to operate
the network,  was $17.3  million and $51.7  million,  respectively,  compared to
$15.5 and $39.5  million  during the same periods in 1998.  As a  percentage  of
total  revenues,  cost of service and  operations  was 75% and 71% for the third
quarter  of 1999 and  1998,  and 78% and 73% for the  nine  month  period  ended
September 30, 1999 and 1998,  respectively.  The increase in cost of service and
operations was primarily attributable to (i) additional headcount,  primarily as
a  result  of  the  ARDIS  acquisition,  (ii)  increased  communication  charges
associated  with  increased  service  usage  and  costs  to  support  the  ARDIS
terrestrial  network,  (iii) system and base station  maintenance to support the
ARDIS  terrestrial   network,   (iv)  site  rental  costs  associated  with  the
terrestrial  network,  and (v)  incremental  Year 2000 costs. As a percentage of
revenue,  cost of  service  and  operations  has  increased  as a result  of the
variable costs incurred within the ARDIS terrestrial network,  such as site rent
and telecommunications  costs. The quarter over quarter increase was primarily a
result of approximately $1 million in Year 2000 costs, which are not anticipated
to continue beyond the first quarter of 2000.



<PAGE>


     The cost of equipment  sold increased $1.2 million or 25% from $4.8 million
for the third  quarter of 1999,  and $3.1 million or 22% from $14.1  million for
the nine month period ended  September  30, 1999.  This  increase was  primarily
attributable to the increase in the volume of sales of the various data products
and warranty costs thereon.

     Sales and advertising  expenses were $5.5 million and $16.0 million for the
three and nine months ended September 30, 1999,  respectively,  compared to $5.4
million and $13.8 million during the same periods in 1998. Sales and advertising
expenses as a percentage of revenue were 24% in the third quarter and first nine
months of 1999,  respectively,  as  compared  to 25% during the same  periods in
1998.  The 16% increase in sales and  advertising  expenses  from the first nine
months of 1998 to the first nine months of 1999 was  primarily  attributable  to
(i) increased  headcount  costs  resulting from the ARDIS  acquisition  and (ii)
costs  associated  with  the  launch  of a new  service  offering  ("eLink(sm)")
including  additional  advertising and headcount for sales and support staff. It
is  anticipated  that sales and  advertising  expenses will continue to increase
slightly as the Company introduces new products and services.

     General and  administrative  expenses were $13.1 million and $22.6 million,
of which $8.5 million is attributable to XM Radio, for the three and nine months
ended  September  30,  1999,  respectively,  compared to $4.5  million and $13.9
million  during  the same  periods  in 1998.  Excluding  XM Radio,  general  and
administrative  expenses  were  $4.6  million  for the third  quarter  and $14.1
million for the nine months ended September 30,1999.  General and administrative
expenses as a percentage of revenue, excluding XM Radio, were 20% and 21% in the
third  quarter and first nine months of 1999,  respectively,  as compared to 21%
and 26% during the same periods in 1998.  The prior year was unusually  high due
to one-time  costs incurred in the second  quarter of 1998  associated  with the
ARDIS  integration.  The slight increase year over year is due to an increase in
personal  property taxes due to an increase in the number of base  stations.  In
addition,  headcount  increased  from the prior year resulting in an increase in
employee  related  expenses  such as bonuses,  payroll  taxes,  and 401(K) match
expense.

     Depreciation  and  amortization  expenses  were  $14.9  million  and  $42.3
million,  of which $0.6 million is attributable  to XM Radio,  for the three and
nine months ended  September 30, 1999,  respectively,  compared to $13.9 million
and  $38.5  million  during  the same  periods  in  1998.  Excluding  XM  Radio,
depreciation and amortization  expenses were $14.3 million and $41.7 million for
the  three  and  nine  months  ending  September  30,  1999.   Depreciation  and
amortization  expenses as a percentage of revenue,  excluding XM Radio, were 62%
and 63% in the third  quarter  and first nine months of 1999,  respectively,  as
compared  to 64% and 71%  during  the same  periods  in 1998.  The $3.2  million
increase year over year is due to an increase in capital  expenditures  from the
prior year for eLink(sm)  software  development  and base station  purchases and
installations,  offset by a  reduction  in  depreciation  and  amortization  for
several fully depreciated assets. In addition, the ARDIS assets acquired and the
amortization of intangibles  acquired in the ARDIS  acquisition also contributed
to the increase in depreciation and amortization expense.

     Interest  and other  income was $1.0 million and $4.6 million for the third
quarter and first nine months of 1999,  respectively,  compared to $1.6  million
and $3.3 million during the same periods in 1998.  Excluding XM Radio,  interest
and other income was $3.7 million and $7.4 million for the three and nine months



<PAGE>


ending  September 30, 1999. The increase was primarily a result of $2 million of
interest income earned on the Company's $82 million  convertible note receivable
from XM Radio  received  in the XM  Acquisition  on July 7,  1999.  The  Company
incurred  $51 million of interest  expense in the first nine months of 1999,  of
which $2 million was incurred by XM Radio, compared to $37.8 million in the same
period of 1998,  reflecting  (i) nine months of  interest  expense on the Senior
Notes at  12.25%  versus  six  months in the prior  year,  offset by lower  debt
balances on the Company's bank loans  (comprising the Term Loan Facility and the
Revolving Credit  Facility) and (ii) the amortization of debt discount,  prepaid
interest and debt  offering  costs,  excluding XM Radio,  in the amount of $12.7
million in the first nine months of 1999, compared to $11.6 million in the first
nine months of 1998. It is  anticipated  that interest costs will continue to be
significant  as a result of the Senior  Notes and as a result of the  borrowings
under the New Bank Financings.  The anticipated additional interest expense will
be offset by a lower amount of amortization of debt discount,  prepaid  interest
and debt offering costs as a result of the write-off,  on a pro-rata  basis,  of
these costs in the third quarter of 1999 in  connection  with the repayment of a
portion of the Term Loan Facility and Revolving Credit Facility.  See "Liquidity
and Capital Resources".

     Net  capital  expenditures  for the first nine  months of 1999 and 1998 for
property  and  equipment  were  $9.9  million  and $7.4  million,  respectively.
Expenditures  consisted  primarily of assets necessary to continue the build out
of the Company's  Network.  In addition,  XM Radio capital  expenditures for its
system under construction were $75.6 million for the period July 7, 1999 through
September 30, 1999.

     As of September 30, 1999,  subscribers  on the Company's  network  exceeded
131,000.

     Liquidity and Capital Resources

     Adequate  liquidity  and capital are critical to the ability of the Company
to  continue  as a going  concern and to fund  subscriber  acquisition  programs
necessary to achieve positive cash flow and profitable  operations.  The Company
expects  to  continue  to make  significant  capital  outlays  to fund  interest
expense,  capital  expenditures  and working  capital  prior to the time that it
begins to  generate  positive  cash  flow from  operations.  These  outlays  are
expected to continue for the foreseeable future thereafter.

     XM Radio is  operated,  managed,  and funded  separately  from the Company.
While  the  Company  does not have any  obligation  or  commitments  to  provide
additional funding to XM Radio, and does not expect to provide such funding,  it
may choose to provide additional  financing in the future. XM Radio will require
significant  additional  funding in the future. XM Radio is currently  exploring
several  financing  arrangements,  which  may  include  selling  debt or  equity
securities  or  obtaining  loans  from  commercial   banks  or  other  financial
institutions.  The failure of XM Radio to obtain required financing could have a
material adverse effect on the value of the Company's investment in XM Radio.



<PAGE>



     On March  31,  1998,  Acquisition  Company  issued  $335  million  of units
consisting  of 12 1/4%  Senior  Notes due 2008  (the  "Senior  Notes"),  and one
warrant to  purchase  3.75749  shares of Common  Stock of the  Company  for each
$1,000 principal  amount of Notes (the  "Warrants"),  and also  restructured its
existing bank  financing (the "New Bank  Financing").  The New Bank Financing of
$200 million consists of a $100 million unsecured  five-year  reducing Revolving
Credit Facility  maturing March 31, 2003 and a $100 million  five-year Term Loan
Facility  with up to three  additional  one-year  extensions  subject  to lender
approval,  a portion of which has been permanently  reduced, as discussed below.
As of September 30, 1999, the Company had $69.0 million  available for borrowing
under the  Revolving  Credit  Facility.  Additionally,  Motorola  has  agreed to
provide the  Company  with up to $10 million of vendor  financing  (the  "Vendor
Financing Commitment"),  which is available to finance up to 75% of the purchase
price of additional  base stations  needed to meet build out requirements  under
certain  customer  contracts.  As  of  September  30,  1999,  $4.2  million  was
outstanding under this facility. In connection with the New Bank Financing, each
of Hughes Electronics Corporation,  Singapore  Telecommunications Ltd. and Baron
Capital Partners, L.P.  (collectively,  the "Bank Facility Guarantors") extended
separate  guarantees of the  obligations of each of Acquisition  Company and the
Company to the Banks,  which on a several basis  aggregated to $200 million.  In
their agreement with each of Acquisition Company and the Company (the "Guarantee
Issuance  Agreement"),  the  Bank  Facility  Guarantors  agreed  to  make  their
guarantees available for the New Bank Financing.  In exchange for the additional
risks undertaken by the Bank Facility Guarantors in connection with the New Bank
Financing,  the  Company  agreed to  compensate  the Bank  Facility  Guarantors,
principally in the form of 1 million  additional  warrants and re-pricing of 5.5
million warrants  previously issued (together,  the "Guarantee  Warrants").  The
Guarantee  Warrants were issued with an exercise price of $12.51 and were valued
at approximately  $17.7 million. On March 29, 1999, the Bank Facility Guarantors
agreed to  eliminate  certain  covenants  contained  in the  Guarantee  Issuance
Agreement relating to earnings before interest,  depreciation,  amortization and
taxes  ("EBITDA")  and service  revenue.  In exchange  for this  elimination  of
covenants,  the Company agreed to re-price their Guarantee  Warrants,  effective
April  1,  1999,  from  $12.51  to  $7.50.   The  value  of  the  repricing  was
approximately  $1.5  million.   As  of  September  30,  1999,  the  Company  had
outstanding  borrowings of $41 million of the Term Loan Facility at 6.375%,  and
$31 million under the Revolving  Credit Facility at rates ranging from 6.375% to
6.4375%.

     Further, in connection with the Guarantee Issuance  Agreement,  the Company
has  agreed to  reimburse  the Bank  Facility  Guarantors  in the event that the
Guarantors are required to make payment under the New Bank Financing guarantees,
and, in  connection  with this  reimbursement  commitment  has provided the Bank
Facility Guarantors a junior security interest with respect to the assets of the
Company, principally its stockholdings in XM Radio and the Acquisition Company.

     In  connection  with the New Bank  Financing,  the Company  entered into an
interest rate swap  agreement,  with an implied  annual rate of 6.51%.  The swap
agreement  reduces  the  impact  of  interest  rate  increases  on the Term Loan
Facility.  The Company paid a fee of  approximately  $17.9  million for the swap



<PAGE>


agreement. Under the swap agreement, the Company will receive an amount equal to
LIBOR plus 50 basis points,  paid directly to the banks on a quarterly basis, on
a notional amount of $100 million (see discussion  below regarding the reduction
of this amount) until the  termination  date of March 31, 2001.  The Company has
reflected  as an asset the  unamortized  fee paid for the swap  agreement in the
accompanying  financial  statements.  The Company is exposed to a credit loss in
the event of non performance by the counter party under the swap agreement.  The
Company does not believe there is a significant  risk of non  performance as the
counter party to the swap agreement is a major financial institution.

     On August 3, 1999,  the Company  raised $116 million,  net of  underwriting
discounts and expenses, through the issuance of 7.0 million shares of its common
stock in a public  offering.  Of the net  proceeds,  $59 million was used to pay
down a portion of the Term Loan Facility, and is not available for re-borrowing.
The  remainder  of the net  proceeds  were  used to pay  down a  portion  of the
Revolving  Credit  Facility,  which will be available for re-borrowing as needed
for general working capital purposes. As a result of the partial pay down of the
Term Facility,  the Company recorded an extraordinary  loss on extinguishment of
debt of approximately $12.1 million, which reflects the write-off, on a pro-rata
basis,  of  warrants  held by  certain  shareholder  guarantors  of the New Bank
Financing (the "Guarantee Warrants") and deferred financing fees associated with
the placement of the New Bank  Financing.  In addition,  the Company reduced the
notional  amount of its swap  agreement  from $100  million to $41  million  and
realized net proceeds of approximately $6 million due to early  termination of a
portion of the swap agreement.

     As a result of the automatic  application of certain adjustment  provisions
following  the issuance of the 7.0 million  shares in the public  offering,  the
exercise  price of the  Guarantee  Warrants was reduced to $7.3571 per share and
the Guarantee  Warrants  became  exercisable  for an additional  126,246 shares.
Additionally,  the  exercise  price of the warrants  associated  with the Senior
Notes was  reduced  to  $12.28  per  share  and the  aggregate  number of shares
issuable upon the exercise of such warrants was increased by 24,294 shares.  The
additional Guarantee Warrants and repricing were valued at $2.4 million, and the
additional Senior Notes warrants and repricing were valued at $440,000. This has
been recorded as an additional debt discount in the third quarter.

     On July 7, 1999, XM Radio issued  $250  million  of  Series A  subordinated
convertible  notes to several new strategic and  financial  investors  including
General Motors Corporation, Clear Channel Investments, DIRECTV, Telcom Ventures,
Columbia  Capital and Madison  Dearborn  Partners.  The notes bear interest at a
rate equal to six- month  LIBOR plus 5% per annum,  and mature on  December  31,
2004,  unless  extended in certain  circumstances  if XM Radio issues high yield
debt  securities.  The principal amount and all accrued interest is payable in a
single installment on the maturity date or on the date of conversion.  The notes
and all accrued  interest  thereon are convertible  into Class A Common Stock or
Series A convertible  preferred stock of XM Radio at a conversion price of $9.52
per share at the election of the note holders or upon the  occurrence of certain
events,  including an initial public  offering of a prescribed  size of XM Radio
shares.  Subsequent to September 30, 1999, XM Radio completed its initial public
offering of 10.2 million  shares of Class A Common  Stock,  which  triggered the



<PAGE>


conversion  of these notes into  approximately  10.8 million  shares of Series A
convertible  preferred  stock and  approximately  16.2 million shares of Class A
common stock.

     Cash used in  operating  activities  was $77.9  million  for the first nine
months of 1999, of which $34.6 million was attributable to XM Radio, compared to
$41.3 million for the comparable  period in 1998.  Excluding XM Radio, cash used
in  operating  activities  was  $43.3  million.  The  increase  in cash  used in
operating activities was primarily attributable to (i) a decrease in net working
capital  resulting  primarily  from the  timing  of cash  receipts  on  accounts
receivable,  an increase in inventory and prepaid in-orbit insurance,  offset by
(ii)   approximately   $5.8  million  of  increased   operating   losses  before
depreciation,  primarily as a result of  additional  net expenses  incurred as a
result of the ARDIS acquisition and Year 2000 compliance programs.  Cash used in
investing  activities was $111.3 million,  of which $75.8 was attributable to XM
Radio, for the first nine months of 1999 compared to $202.1 million for the same
period in 1998.  Excluding XM Radio, cash used in investing activities was $35.5
million.  The decrease is the result of the  acquisition of ARDIS in March 1998,
and the  funding  of  certain  escrows  required  in  connection  with the ARDIS
Acquisition and issuance of Senior Notes, offset by the issuance in January 1999
of the XM Radio Note  Receivable  and year to date  capital  expenditures.  Cash
provided by financing activities was $248.4 million, of which $164.5 million was
attributable to XM Radio, in the first nine months of 1999 as compared to $252.0
million  during the same period in 1998.  Excluding XM Radio,  cash  provided by
financing activities was $83.9 million.  This decrease reflects (i) the issuance
of the Senior Notes in March 1998,  offset by the  repayment of other  long-term
debt in the first nine months of 1998,  (ii) the  proceeds  from the issuance of
the Baron XM Radio  Convertible  Note in the first  quarter  of 1999,  (iii) the
proceeds  from the reduction of the interest rate swap and (iv) the repayment of
the Term Loan  Facility.  Proceeds  from the sale of Common  Stock  were  $122.0
million and $412,000  for the first nine months of 1999 and 1998,  respectively.
This $122 million increase was primarily due to the net proceeds of $116 million
from the stock  offering  in August  1999 and the  exercise  of  employee  stock
options.  Excluding XM Radio, payments on long-term debt and capital leases were
$117.3  million  and $117.5  million for the first nine months of 1999 and 1998,
respectively. In addition, the Company, excluding XM Radio, incurred $329,000 of
debt  issuance  costs in the first nine  months of 1999,  as  compared  to $15.0
million in the first nine months of 1998,  which  resulted from the placement of
the Senior Notes and amendments to the New Bank  Financing.  As of September 30,
1999,  the  Company  had $61.4  million  of cash and cash  equivalents,  working
capital of $51.9 million,  and $41.0 million of current  investments  restricted
for the payment of interest. Excluding XM Radio, the Company had $7.1 million of
cash and cash equivalents,  working capital of $23.0 million, and $41 million of
current investments restricted for the payment of interest. None of the cash and
working capital held by XM Radio is available for use by the Company.

     The Company has arranged the financing of certain trade payables, and as of
September 30, 1999, $6.1 million of deferred trade payables were  outstanding at
rates ranging from 6.10% to 12.0% and are generally payable by the end of 2000.



<PAGE>


     XM Radio estimates that it will require in total approximately $1.1 billion
from its inception through the commencement of commercial  operations,  which is
targeted for the second  quarter of 2001,  to develop and implement the XM Radio
system as well as to provide working  capital needs.  Including the funds raised
in its  initial  public  offering,  XM Radio has  raised  $445  million,  net of
expenses and repayment of debt, to date through the issuance of debt and equity.
The funds have been used to acquire its FCC  license,  make  payments  under its
satellite  contract and various other  contractual  commitments with vendors and
strategic partners, as well as for working capital and operating expenses. Total
capital  expenditures  from XM Radio's inception through September 30, 1999 were
$228.4 million.

     The Company's current operating assumptions and projections,  which reflect
management's  best  estimate  of  subscriber  and revenue  growth and  operating
expenses,  indicate that anticipated  capital  expenditures,  operating  losses,
working capital and debt service  requirements  through 1999 and beyond,  can be
met by cash flows from operations,  the net proceeds from the issuance of common
stock in August  1999,  the net  proceeds  from the sale of the Senior Notes and
Warrants,  together  with the  borrowings  under the New Bank  Financing and the
Vendor  Financing  Commitment;  however,  the  Company's  ability  to  meet  its
projections is subject to numerous  uncertainties  and there can be no assurance
that the Company's  current  projections  regarding the timing of its ability to
achieve positive operating cash flow will be accurate, and if the Company's cash
requirements  are more  than  projected,  the  Company  may  require  additional
financing  in  amounts  which may be  material.  The type,  timing  and terms of
financing  selected by the Company will be  dependent  upon the  Company's  cash
needs, the availability of other financing sources and the prevailing conditions
in the financial  markets.  There can be no assurance that any such sources will
be available to the Company at any given time or available on favorable terms.

     Baron XM Radio Convertible Note

     On January 15,  1999,  the Company  issued to Baron Asset Fund  ("Baron") a
$21.5 million note  convertible into shares of XM Radio common stock (the "Baron
XM Radio Convertible Note"). The Company subsequently loaned approximately $21.4
million to XM Radio in exchange for XM Radio common stock and a note convertible
into XM Radio  shares  (the "XM  Radio  Note  Receivable").  The  Baron XM Radio
Convertible  Note ranks  subordinate to all other debt securities of the Company
and is fully  collateralized by shares of XM Radio. The XM Radio Note Receivable
is a non-recourse  note and is convertible into shares of XM Radio common stock.
The XM Radio  Note  Receivable  earns  interest  at LIBOR  plus 5% and is due on
December 31, 2004, unless extended,  in certain circumstances if XM Radio issues
high yield debt securities. Subsequent to September 30, 1999, XM Radio completed
its initial  public  offering of 10.2  million  shares of Class A Common  Stock,
which  triggered the conversion of the XM Radio Note Receivable into 1.5 million
shares of XM Radio Class B common  stock.  The Baron XM Radio  Convertible  Note
accrues  interest at the rate of 6% annually,  with all payments  deferred until
maturity,  December 31, 2004, or extinguished  upon conversion.  The Company has
the option to  satisfy  the Baron XM Radio  Convertible  Note by  tendering  the
shares into which it would have been convertible in lieu of any cash payments.


<PAGE>



     The  Company's  September  30, 1999  consolidated  condensed  balance sheet
reflects  management's  estimate  of the  fair  value  of  the  Baron  XM  Radio
Convertible  Note.  Changes in the fair value of the Baron XM Radio  Convertible
Note are reflected in the accompanying  statement of operations as an unrealized
gain or loss on note  payable  to  related  party  ($2.8  million  loss and $7.2
million  gain  for  the  three  and   nine-months   ended  September  30,  1999,
respectively).  In the future,  the Company expects to continue to record in its
financial  statements the Baron XM Radio  Convertible Note at its estimated fair
value. Prior to the XM Acquisition,  the Company also recorded the XM Radio Note
Receivable at  management's  best  estimate of its fair value,  and as a result,
recorded an unrealized  loss on the XM Radio Note Receivable of $9.9 million for
the six months ended June 30, 1999.  As a result of the XM  Acquisition,  the XM
Radio Note Receivable is eliminated in consolidation.

     In accordance with Staff Accounting  Bulletin 51 (SAB 51), the Company will
record an increase to its  investment in XM Radio in the fourth quarter of 1999.
SAB 51 addresses the accounting  for sales of stock by a subsidiary.  Because XM
Radio is a development stage company, SAB 51 requires that the difference in the
carrying  amount of the parent's  investment in the  subsidiary and the net book
value of the  subsidiary  after the stock issuance be reflected in the financial
statements of the parent as a capital transaction.

     Commitments

     At September 30, 1999, the Company had remaining contractual commitments to
purchase both mobile data terminal  inventory and mobile telephone  inventory in
the maximum amount of $4.0 million  during the remainder of 1999.  Additionally,
the  Company had  remaining  contractual  commitments  for the  development  and
production of certain next  generation  data  terminals of  approximately  $32.1
million,  subject to final pricing negotiations,  over a three-year period, with
delivery  starting in the fourth  quarter of 1999.  The Company has the right to
terminate  the research  and  development  and  inventory  commitment  by paying
cancellation  fees of between $1.0 million and $2.3  million,  depending on when
the termination option is exercised during the term of the contract. The Company
also has the  right  to  terminate  the  inventory  commitment  by  incurring  a
cancellation penalty representing a percentage of the unfulfilled portion of the
contract.  The Company has also  contracted for the purchase of $25.9 million of
next  generation  wireless  data  terminals  which  began  delivery in the third
quarter of 1999. The contract contains a 50% cancellation penalty.

     XM Radio is also subject to certain commitments and contingencies. XM Radio
has a distribution  agreement with General Motors that will require  significant
expenditures in the future. Additionally, under its satellite contract, XM Radio
will incur  approximately  $541.3 million, of which $147.9 million has been paid
at  September  30,1999.  XM  Radio  also  has a  contract  for  the  design  and
development  of its  terrestrial  repeater  network  with  payments  under  this
contract expected to be approximately $115 million.  Additional information with
respect to these  contractual  commitments is provided in XM Radio's filings and
periodic reports with the SEC.


<PAGE>



     In January 1999, a competitor of XM Radio filed an action  against XM Radio
for patent  infringement.  In  February  1999,  XM Radio  filed an answer to the
action. XM Radio does not believe that it has infringed, and it believes that it
will not  infringe  any of the  competitor's  patents and intends to  vigorously
defend against the suit; however, the outcome is uncertain at this time.

     All wholly  owned  subsidiaries  of the Company  are  subject to  financing
agreements  that  limit the  amount  of cash  dividends  and  loans  that can be
advanced to the Company.  At September 30, 1999, all of these  subsidiaries' net
assets were restricted under these agreements.  These  restrictions will have an
impact on the Company's ability to pay dividends.

     Regulation

     The ownership and  operations  of the Company's  communication  systems are
subject to significant regulation by the FCC, which acts under authority granted
by the  Communications Act of 1934, as amended (the  "Communications  Act"), and
related federal laws. A number of the Company's  licenses are subject to renewal
by the FCC and, with respect to the Company's satellite operations,  are subject
to international  frequency coordination.  In addition,  current FCC regulations
generally  limit the  ownership  and  control  of  American  Mobile by  non-U.S.
citizens  or  entities  to 25%.  There can be no  assurances  that the rules and
regulations  of the FCC will  continue to support the  Company's  operations  as
presently  conducted and contemplated to be conducted in the future, or that all
existing licenses will be renewed and requisite frequencies coordinated.

     Year 2000 Readiness

     The Company's Year 2000 Readiness  Program uses the phased approach that is
common in its industry.  "Year 2000 Ready," or "Year 2000 Readiness," means that
customers   will   experience  no  material   difference  in   performance   and
functionality of the Company's networks prior to, during or after the year 2000.
All phases have been  completed for the  satellite  voice and  terrestrial  data
networks.  Regarding its satellite data networks,  American Mobile has completed
all  phases of work for hub  equipment  and is in the  process of  upgrading  or
assisting customers in upgrading their equipment. The Company has also completed
validation/test,  implementation  and rollout of its internal systems (including
voice customer billing software,  CMIS). In implementing its Year 2000 Readiness
Program, the Company has received oral and written representations and readiness
statements  from  vendors  and  suppliers,  including,  but not  limited to, the
manufacturer of the Company's satellite and its provider of telemetry,  tracking
and  control  services  for  the  satellite.  The  Company  has  relied  on such
representations  in assessing its Year 2000  Readiness.  The complex of hardware
and software that the Company  maintains  consists of  commercial  off-the-shelf
(COTS) software, as  well as custom software developed specifically for American


<PAGE>



Mobile's  networks.  In certain  cases,  American  Mobile's Year 2000  Readiness
Program  involves  upgrading  COTS software that is unsupported by the vendor or
whose Year 2000 Readiness could not be determined. Upgrading such COTS software,
as planned, provides greater certainty regarding the Year 2000 Readiness of such
products and ensures that vendor support will be available.

     The total  cost of  American  Mobile's  Year  2000  Readiness  Program  was
approximately  $2.4 million in 1998.  Expenditures  for the Year 2000  Readiness
Program in 1999 were estimated to  be up to $6.1 million,  $5.0 million has been
incurred as of September 30, 1999.  Some of these costs,  including the purchase
of software  upgrades and  consulting  services,  are expensed as incurred while
other  costs,  such  as  hardware  purchases,   are  being  treated  as  capital
expenditures.  The  lower-than  expected  costs  are  mainly  due to lower  than
expected  internal and external  effort  required to upgrade the  Communications
Ground Segment, including its Northern Telecom switch.

     The estimated cost schedule and readiness status for American Mobile's Year
2000 Readiness  Program are management's  best estimates.  However,  there is no
guarantee  that the Company will achieve these results and actual  results could
differ  materially from those  anticipated.  Some of American  Mobile's critical
business  systems  depend  significantly  on software  programs  and third party
services that are not within the Company's  control.  Failure to solve Year 2000
errors  within  American  Mobile's  critical  business  systems  could result in
possible service outages, miscalculations or disruption of operations that could
have a material impact on the Company's business. Because of the Company's heavy
dependence  on  software,  some  Year  2000  problems  may not be  found  or the
remediation  efforts may introduce new bugs that are not identified  before they
impact operations. This applies to both COTS software and custom software.

     If American Mobile's  customers fail to become Year 2000 ready on time with
their own hardware and software  systems,  their  applications  may not function
even if  American  Mobile's  systems  are Year 2000  Ready.  This will result in
reduced traffic and revenues.  Also,  suppliers of goods and services may suffer
Year 2000-related  failures from which the Company cannot adequately protect its
business.

     American  Mobile has  contingency  and recovery  plans in place to minimize
service interruptions that can mitigate,  although not eliminate,  interruptions
caused by problems resulting from Year 2000 issues. For example, the Company has
backup  power  supplies  and  generators  in place for  certain  portions of its
networks  in the  event of  electrical  power  outages.  In  addition,  for some
services  American  Mobile has contracted  with more than one service  provider.
These plans, systems and services are being incorporated into the Company's Year
2000 contingency planning.  To the extent that it is commercially  reasonable to
do so, American  Mobile is including  other redundant or alternative  sources of
services in its Year 2000 contingency planning efforts.



<PAGE>



     Accounting Standards

     In June 1998,  FASB issued  Statement No. 133,  "Accounting  for Derivative
Instruments  and Hedging  Activities,"  which  requires the  recognition  of all
derivatives  as either  assets or  liabilities  measured at fair value.  In June
1999,  FASB  issued  Statement  No.  137,  which  defers the  effective  date of
Statement  No. 133 until fiscal  quarters  beginning  after June 15,  2000.  The
Company  does not  believe  that the  adoption  of this  statement  will  have a
material impact on its financial position and results.


                           PART II - OTHER INFORMATION
           Item 4. Submission of Matters to a Vote of Security Holders

     (a) At a special  meeting of the  stockholders  of American  Mobile held on
September 7, 1999, the matters described under (c) below were voted upon.

     (b) Not Applicable.

     (c)  (1)  Stockholders  approved the issuance of 2,134,801 shares of common
          stock, par value $.01 per share ("Common Stock"),  to XM Ventures,  in
          connection with the Exchange Agreement entered into by American Mobile
          with  WorldSpace,  Inc.,  XM  Satellite  Radio  Holdings  Inc.  and XM
          Ventures.  The vote on this  proposal was  20,663,620  for,  1,030,200
          against, and 18,683 abstaining.

          (2)   Stockholders  approved   an   amendment  to   American  Mobile's
          Restated  Certificate  of  Incorporation  to  increase  the  number of
          shares of Common Stock  authorized  for issuance  from  75,000,000  to
          150,000,000  shares.  The vote on this  proposal was  29,994,178  for,
          1,577,379 against, and 19,191 abstaining.

     (d)  Not Applicable.


Item 6. Exhibits and Reports on Form 8-K

(a)       Exhibits

3.1  -    Restated  Certificate of  Incorporation  of American Mobile  Satellite
          Corporation (as restated effective September 7, 1999) (incorporated by
          reference to Exhibit 4.1 to the  Company's  registration  statement on
          Form S-8 (File No. 333-88807)).



<PAGE>



3.2  -    Amended and Restated Bylaws of American  Mobile  Satellite (as amended
          and restated effective  September 23, 1999) (incorporated by reference
          to Exhibit 4.2 to the  Company's  registration  statement  on Form S-8
          (File No. 333-88807)).

11.1 -    Computations of Earnings Per Common Share (filed herewith)

27.0 -    Financial Data Schedule (filed herewith)


(b)      Current Reports on Form 8-K
         On October 6, 1999,  the Company filed a Current Report on Form 8-K, in
         response  to  Item  5-Other   Events,   reporting  that  the  Company's
         subsidiary, XM Satellite Radio Holdings Inc.
         had commenced an initial public offering.


<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 thereunto duly authorized.

                                          AMERICAN MOBILE SATELLITE CORPORATION
                                          (Registrant)



Date:   November 15, 1999           /s/Walter V. Purnell, Jr.
                                    --------------------------------------
                                    Walter V. Purnell, Jr.
                                    President and Chief Executive Officer



                                    /s/W. Bartlett Snell
                                    --------------------------------------
                                    W. Bartlett Snell
                                    Senior Vice President and
                                       Chief Financial Officer
                                    (principal financial and accounting officer)



<PAGE>



                                  EXHIBIT INDEX

Number         Description

3.1  -         Restated   Certificate  of   Incorporation   of  American  Mobile
               Satellite  Corporation (as restated effective  September 7, 1999)
               (incorporated  by  reference  to  Exhibit  4.1 to  the  Company's
               registration statement on Form S-8 (File No. 333-88807)).

3.2  -         Amended and  Restated  Bylaws of American  Mobile  Satellite  (as
               amended and restated effective  September 23, 1999) (incorporated
               by  reference  to  Exhibit  4.2  to  the  Company's  registration
               statement on Form S-8 (File No. 333-88807)).

11.1  -        Computations of Earnings Per Common Share (filed herewith)

27.0  -        Financial Data Schedule (filed herewith)




<PAGE>



                                  EXHIBIT 11.1

                      AMERICAN MOBILE SATELLITE CORPORATION
                     ---------------------------------------
                    COMPUTATIONS OF EARNINGS PER COMMON SHARE
                     ---------------------------------------
                    (in thousands, except per share amounts)
                     ---------------------------------------

<TABLE>
<CAPTION>


                                                        Three Months Ended                  Nine Months Ended
                                                          September 30,                       September 30,

                                                             1999              1998              1999             1998
                                                             ----              ----              ----             ----
BASIC EARNINGS PER SHARE CALCULATION

<S>                                                     <C>               <C>              <C>               <C>
Loss before extraordinary item                          ($53,893)         ($39,384)        ($139,413)        ($109,779)
Extraordinary item                                       (12,132)               --           (12,132)               --
                                                         --------         ---------         --------         ----------
    Net Loss                                            ($66,025)         ($39,384)        ($151,545)        ($109,779)
                                                        =========         =========        ==========        ==========
Loss per common share before
extraordinary item                                        ($1.18)           ($1.24)           ($3.79)           ($3.71)

Extraordinary item per common share                        (0.27)               --             (0.33)               --
                                                           ------          --------            ------        ----------
Net Loss per common share                                 ($1.45)           ($1.24)           ($4.12)           ($3.71)
                                                          =======           =======           =======           =======
Weighted-average common shares
outstanding                                               45,421            31,773            36,740            29,604
                                                          ======            ======            ======            ======

DILUTED EARNINGS PER SHARE CALCULATION
Loss before extraordinary item                          ($53,893)         ($39,384)        ($139,413)        ($109,779)
Extraordinary item                                       (12,132)               --           (12,132)               --
                                                         --------         ---------          --------        ----------
    Net Loss                                            ($66,025)         ($39,384)        ($151,545)        ($109,779)
                                                        =========         =========        ==========        ==========
Loss per common share before
extraordinary item                                        ($1.05)           ($1.24)           ($3.29)           ($3.70)


Extraordinary item per common share                        (0.24)               --             (0.29)               --
                                                           ------          --------            ------         ---------
Net Loss per common share                                 ($1.29)           ($1.24)           ($3.58)           ($3.70)
                                                          =======           =======           =======           =======
Weighted-average common shares
outstanding (1)                                           51,157            31,836            42,349            29,670
                                                          ======            =======           ======            ======
(1)  Calculated as follows:
      Historical weighted average number of
          shares outstanding                              45,421            31,773            36,740            29,604
      Assumed exercise of stock options                    1,449                --             1,450                 2
      Assumed exercise of stock
        purchase warrants                                  4,287                63             4,159                64
                                                           -----                --             -----                --

                                                          51,157            31,836            42,349            29,670
                                                          ======            ======            ======            ======

</TABLE>



<TABLE> <S> <C>


<ARTICLE>                               5
<LEGEND>
     This schedule  contains summary  financial  information  extracted from the
     Company's unaudited  Consolidated  Statement of Loss,  Consolidated Balance
     Sheet, and Consolidated  Statement of Cash Flows, in each case for the nine
     months  ended  September  30,  1999,  and is  qualified  in its entirety by
     reference to such financial statements.
</LEGEND>
<MULTIPLIER>                             1,000
<CURRENCY>                               U.S. Dollars

<S>                                      <C>
<PERIOD-TYPE>                            9-MOS
<FISCAL-YEAR-END>                        DEC-31-1999
<PERIOD-START>                           JAN-01-1999
<PERIOD-END>                             SEP-30-1999
<EXCHANGE-RATE>                                 1
<CASH>                                     61,431
<SECURITIES>                                    0
<RECEIVABLES>                              18,062
<ALLOWANCES>                                    0
<INVENTORY>                                19,597
<CURRENT-ASSETS>                          162,359
<PP&E>                                    220,478
<DEPRECIATION>                                  0
<TOTAL-ASSETS>                            829,967
<CURRENT-LIABILITIES>                      69,453
<BONDS>                                   678,269
                           0
                                     0
<COMMON>                                      485
<OTHER-SE>                                (78,347)
<TOTAL-LIABILITY-AND-EQUITY>              829,967
<SALES>                                    15,997
<TOTAL-REVENUES>                           66,073
<CGS>                                      17,167
<TOTAL-COSTS>                              90,287
<OTHER-EXPENSES>                           42,315
<LOSS-PROVISION>                                0
<INTEREST-EXPENSE>                         50,957
<INCOME-PRETAX>                          (139,413)
<INCOME-TAX>                             (139,413)
<INCOME-CONTINUING>                      (139,413)
<DISCONTINUED>                                  0
<EXTRAORDINARY>                           (12,132)
<CHANGES>                                       0
<NET-INCOME>                             (151,595)
<EPS-BASIC>                               (4.12)
<EPS-DILUTED>                               (4.12)



</TABLE>


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