NUCENTRIX BROADBAND NETWORKS INC
11-K, 1999-06-30
CABLE & OTHER PAY TELEVISION SERVICES
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                --------------

                                   FORM 11-K

(Mark One)

[X]      ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT
         OF 1934

                  For the fiscal year ended December 31, 1998

                                       OR

[ ]      TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE
         ACT OF 1934

For the transition period from                    to


                         Commission file number 0-23694


                    HEARTLAND WIRELESS COMMUNICATIONS, INC.
                                  401(k) PLAN


                       NUCENTRIX BROADBAND NETWORKS, INC.
                (f/k/a HEARTLAND WIRELESS COMMUNICATIONS, INC.)
                         200 CHISHOLM PLACE, SUITE 200
                               PLANO, TEXAS 75075


<PAGE>   2

                    HEARTLAND WIRELESS COMMUNICATIONS, INC.
                                  401(k) PLAN

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                               PAGE
<S>                                                                                                            <C>
Independent Auditors' Report                                                                                     1

Statement of Net Assets Available for Benefits as of December 31, 1998                                           2

Statement of Net Assets Available for Benefits as of December 31, 1997                                           3

Statement of Changes in Net Assets Available for Benefits - For the year
      ended December 31, 1998                                                                                    4

Statement of Changes in Net Assets Available for Benefits - For the year
      ended December 31, 1997                                                                                    5

Notes to Financial Statements                                                                                    6


SCHEDULES
1     Item 27a - Schedule of Assets Held for Investment Purposes as of December 31, 1998                        11

2     Item 27d - Schedule of Reportable Transactions - For the year ended December 31, 1998                     12
</TABLE>


<PAGE>   3

                          INDEPENDENT AUDITORS' REPORT


The Plan Administrator
Heartland Wireless Communications, Inc.
401(k) Plan:

We have audited the accompanying statements of net assets available for
benefits of the Heartland Wireless Communications, Inc. 401(k) Plan (the
"Plan") as of December 31, 1998 and 1997, and the related statements of changes
in net assets available for benefits for the years then ended. These financial
statements are the responsibility of the Plan's management. Our responsibility
is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements. An audit
also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.

In our opinion, the financial statements referred to above present fairly, in
all material respects, the net assets available for benefits of the Plan as of
December 31, 1998 and 1997, and the changes in net assets available for
benefits for the years then ended in conformity with generally accepted
accounting principles.

Our audits were made for the purpose of forming an opinion on the basic
financial statements taken as a whole. The supplemental schedules, Item 27a -
Schedule of Assets Held for Investment Purposes as of December 31, 1998 and
Item 27d - Schedule of Reportable Transactions for the year ended December 31,
1998, are presented for the purpose of additional analysis and are not a
required part of the basic financial statements but are supplementary
information required by the Department of Labor's Rules and Regulations for
Reporting and Disclosure under the Employee Retirement Income Security Act of
1974. The individual fund information in the statement of net assets available
for benefits and the statement of changes in net assets available for benefits
is presented for purposes of additional analysis rather than to present the net
assets available for benefits and changes in net assets available for benefits
of each fund. These supplemental schedules and fund information are the
responsibility of the Plan's management. The supplemental schedules and fund
information have been subjected to the auditing procedures applied in the
audits of the basic financial statements and, in our opinion, are fairly stated
in all material respects in relation to the basic financial statements taken as
a whole.


                                   /s/ KPMG LLP

Dallas, Texas
June 16, 1999


                                       1

<PAGE>   4

                    HEARTLAND WIRELESS COMMUNICATIONS, INC.
                                  401(k) PLAN

                 Statement of Net Assets Available for Benefits

                               December 31, 1998


<TABLE>
<CAPTION>

                                                                                                GOLDMAN    HEARTLAND
                                               WASHINGTON      THE        THE        THE         SACHS      WIRELESS
                                                 MUTUAL       GROWTH   INVESTMENT    BOND        MONEY   COMMUNICATIONS,
                                                INVESTORS    FUND OF   COMPANY OF   FUND OF      MARKET       INC.
                                                  FUND       AMERICA  AMERICA FUND  AMERICA      FUND     COMMON STOCK    TOTAL
                                               ----------  ----------  ----------  ----------  ----------  ----------  ----------

<S>                                            <C>         <C>         <C>         <C>         <C>         <C>         <C>
Assets:
    Investments, at fair value (note 5):
       Goldman Sachs Money Market Fund         $       --          --          --          --      20,167          --      20,167
       Mutual funds                               138,606     155,436     104,307          --          --          --     398,349
       Bond fund                                       --          --          --      34,569          --          --      34,569
       Heartland Wireless Communications,
          Inc. common stock                            --          --          --          --          --       2,622       2,622
                                               ----------  ----------  ----------  ----------  ----------  ----------  ----------
                                                  138,606     155,436     104,307      34,569      20,167       2,622     455,707

    Receivables:
       Participant contributions receivable         2,708       2,740       1,777         262         171          --       7,658
       Investment income receivable                    19          17          17          --          85          12         150
                                               ----------  ----------  ----------  ----------  ----------  ----------  ----------
                Total assets                      141,333     158,193     106,101      34,831      20,423       2,634     463,515
                                               ----------  ----------  ----------  ----------  ----------  ----------  ----------
Liabilities:
    Refunds payable                                 5,396       1,757       4,579       1,434          --         157      13,323
    Due for unsettled trades                        3,074       2,848       1,934         261          --          --       8,117
                                               ----------  ----------  ----------  ----------  ----------  ----------  ----------
                Total liabilities                   8,470       4,605       6,513       1,695          --         157      21,440
                                               ----------  ----------  ----------  ----------  ----------  ----------  ----------
Net assets available for benefits              $  132,863     153,588      99,588      33,136      20,423       2,477     442,075
                                               ==========  ==========  ==========  ==========  ==========  ==========  ==========
</TABLE>


See accompanying notes to the financial statements.


                                       2

<PAGE>   5

                    HEARTLAND WIRELESS COMMUNICATIONS, INC.
                                  401(k) PLAN

                 Statement of Net Assets Available for Benefits

                               December 31, 1997

<TABLE>
<CAPTION>

                                                                                                GOLDMAN    HEARTLAND
                                               WASHINGTON     THE         THE        THE         SACHS      WIRELESS
                                                 MUTUAL     GROWTH     INVESTMENT    BOND        MONEY   COMMUNICATIONS,
                                               INVESTORS    FUND OF    COMPANY OF   FUND OF      MARKET       INC.
                                                  FUND      AMERICA   AMERICA FUND  AMERICA       FUND    COMMON STOCK   TOTAL
                                               ----------  ----------  ----------  ----------  ----------  ----------  ----------

<S>                                            <C>         <C>         <C>         <C>         <C>          <C>        <C>
Assets:
    Investments, at fair value (note 5):
       Goldman Sachs Money Market Fund         $       --          --          --          --       8,221          --       8,221
       Mutual funds                                63,837      59,871      43,050          --          --          --     166,758
       Bond fund                                       --          --          --       6,901          --          --       6,901
       Heartland Wireless Communications,
          Inc. common stock                            --          --          --          --          --     104,164     104,164
                                               ----------  ----------  ----------  ----------  ----------  ----------  ----------

                                                   63,837      59,871      43,050       6,901       8,221     104,164     286,044

    Receivables:
       Employer contributions receivable               --          --          --          --          --       6,818       6,818
       Participant contributions receivable         4,393       4,353       2,870         913         385       7,031      19,945
                                               ----------  ----------  ----------  ----------  ----------  ----------  ----------

                Total assets                       68,230      64,224      45,920       7,814       8,606     118,013     312,807
                                               ----------  ----------  ----------  ----------  ----------  ----------  ----------

Liabilities - refunds payable                       1,915         258       3,960         129         257       9,503      16,022
                                               ----------  ----------  ----------  ----------  ----------  ----------  ----------

Net assets available for benefits              $   66,315      63,966      41,960       7,685       8,349     108,510     296,785
                                               ==========  ==========  ==========  ==========  ==========  ==========  ==========
</TABLE>


See accompanying notes to the financial statements.


                                       3

<PAGE>   6

                    HEARTLAND WIRELESS COMMUNICATIONS, INC.
                                  401(k) PLAN

           Statement of Changes in Net Assets Available for Benefits

                      For the year ended December 31, 1998

<TABLE>
<CAPTION>
                                                                                                        HEARTLAND
                                                                        THE                   GOLDMAN    WIRELESS
                                                WASHINGTON   THE     INVESTMENT     THE        SACHS   COMMUNICATIONS,
                                                  MUTUAL    GROWTH   COMPANY OF     BOND       MONEY       INC.
                                                INVESTORS   FUND OF   AMERICAN     FUND OF     MARKET     COMMON
                                                   FUND     AMERICA     FUND       AMERICA      FUND      STOCK        TOTAL
                                                ---------  ---------  ---------   ---------   ---------  ---------   ---------

<S>                                             <C>        <C>        <C>         <C>         <C>         <C>        <C>
Additions to net assets attributed to:
    Employer's contributions                    $      --         --         --          --          --     64,426      64,426
    Participants' contributions                    56,673     60,734     41,630      12,085       7,224     48,926     227,272
                                                ---------  ---------  ---------   ---------   ---------  ---------   ---------
             Total contributions                   56,673     60,734     41,630      12,085       7,224    113,352     291,698

    Employee rollovers from other plans            21,173     20,760     21,173      15,332       7,245         --      85,683

    Investment income (loss):
       Dividend and interest income                 1,904        748      1,228       1,265         548        348       6,041
       Net appreciation (depreciation)
          in fair value of investments             15,125     30,129     14,041        (222)         --   (192,601)   (133,528)
                                                ---------  ---------  ---------   ---------   ---------  ---------   ---------
             Net investment income (loss)          17,029     30,877     15,269       1,043         548   (192,253)   (127,487)
                                                ---------  ---------  ---------   ---------   ---------  ---------   ---------
             Total additions                       94,875    112,371     78,072      28,460      15,017    (78,901)    249,894

Deductions from net assets attributed to:
    Benefits Paid                                  28,578     26,915     17,680       3,426       3,630     24,375     104,604
                                                ---------  ---------  ---------   ---------   ---------  ---------   ---------
             Total deductions                      28,578     26,915     17,680       3,426       3,630     24,375     104,604
                                                ---------  ---------  ---------   ---------   ---------  ---------   ---------
             Net increase (decrease)
                prior to interfund transfers       66,297     85,456     60,392      25,034      11,387   (103,276)    145,290

Interfund transfers, net                              251      4,166     (2,764)        417         687     (2,757)         --
                                                ---------  ---------  ---------   ---------   ---------  ---------   ---------
             Net increase (decrease)               66,548     89,622     57,628      25,451      12,074   (106,033)    145,290

Net assets available for benefits:
    Beginning of year                              66,315     63,966     41,960       7,685       8,349    108,510     296,785
                                                ---------  ---------  ---------   ---------   ---------  ---------   ---------
    End of year                                 $ 132,863    153,588     99,588      33,136      20,423      2,477     442,075
                                                =========  =========  =========   =========   =========  =========   =========
</TABLE>



See accompanying notes to financial statements.


                                       4

<PAGE>   7

                    HEARTLAND WIRELESS COMMUNICATIONS, INC.
                                  401(k) PLAN

           Statement of Changes in Net Assets Available for Benefits

                      For the year ended December 31, 1997

<TABLE>
<CAPTION>

                                                                                               GOLDMAN     HEARTLAND
                                               WASHINGTON      THE        THE         THE       SACHS       WIRELESS
                                                 MUTUAL      GROWTH    INVESTMENT     BOND      MONEY    COMMUNICATIONS,
                                               INVESTORS     FUND OF   COMPANY OF    FUND OF    MARKET        INC.
                                                  FUND       AMERICA  AMERICA FUND   AMERICA     FUND     COMMON STOCK    TOTAL
                                               ----------  ----------  ----------  ----------  ----------  ----------   ----------

<S>                                            <C>         <C>         <C>         <C>         <C>         <C>          <C>
Additions to net assets attributed to:
    Employer's contributions                   $       --          --          --          --          --      96,759       96,759
    Participants' contributions                    49,947      51,777      31,877       7,103       7,316     138,791      286,811
                                               ----------  ----------  ----------  ----------  ----------  ----------   ----------

             Total contributions                   49,947      51,777      31,877       7,103       7,316     235,550      383,570

    Employee rollovers from other plans               186         558         186          --          --          --          930

    Investment income (loss):
       Dividend and interest income                 1,627         465         488         328         313         624        3,845
       Net appreciation (depreciation)
          in fair value of investments             11,419       9,066       7,120          75          --    (186,531)    (158,851)
                                               ----------  ----------  ----------  ----------  ----------  ----------   ----------

             Net investment income (loss)          13,046       9,531       7,608         403         313    (185,907)    (155,006)
                                               ----------  ----------  ----------  ----------  ----------  ----------   ----------

             Total additions                       63,179      61,866      39,671       7,506       7,629      49,643      229,494

Deductions from net assets attributed to:
    Benefits Paid                                  29,402      25,143      19,120       2,079       3,687      70,020      149,451
                                               ----------  ----------  ----------  ----------  ----------  ----------   ----------

             Total deductions                      29,402      25,143      19,120       2,079       3,687      70,020      149,451
                                               ----------  ----------  ----------  ----------  ----------  ----------   ----------

             Net increase (decrease)
                prior to interfund transfers       33,777      36,723      20,551       5,427       3,942     (20,377)      80,043

Interfund transfers, net                            1,255       1,225       1,217          49         989      (4,735)          --
                                               ----------  ----------  ----------  ----------  ----------  ----------   ----------

             Net increase (decrease)               35,032      37,948      21,768       5,476       4,931     (25,112)      80,043

Net assets available for benefits:
    Beginning of year                              31,283      26,018      20,192       2,209       3,418     133,622      216,742
                                               ----------  ----------  ----------  ----------  ----------  ----------   ----------

    End of year                                $   66,315      63,966      41,960       7,685       8,349     108,510      296,785
                                               ==========  ==========  ==========  ==========  ==========  ==========   ==========
</TABLE>

See accompanying notes to financial statements.


                                       5
<PAGE>   8

                    HEARTLAND WIRELESS COMMUNICATIONS, INC.
                                  401(k) PLAN

                         Notes to Financial Statements

                           December 31, 1998 and 1997

(1)      DESCRIPTION OF PLAN

         The following description of the Heartland Wireless Communications,
         Inc. 401(k) Plan (the "Plan") provides only general information.
         Participants should refer to the Plan agreement for a more complete
         description of the Plan's provisions.

         (a)         GENERAL

                  The Plan was established for the benefit of the employees of
                  Nucentrix Broadband Network, Inc. (formerly Heartland
                  Wireless Communications, Inc.) ("the Employer" or the
                  "Company") effective January 1, 1996. Participant
                  contributions began the pay period ended June 15, 1996.

                  The Plan is a defined contribution plan sponsored by the
                  Company. Employees are eligible to participate in the Plan
                  upon the completion of six months of service during which
                  time they have been credited with 1,000 hours of service and
                  have attained the age of twenty-one. The Plan is subject to
                  the provisions of the Employee Retirement Income Security Act
                  of 1974 ("ERISA").

         (b)         CONTRIBUTIONS

                  Each participant may make elective contributions pursuant to
                  a salary reduction election while a participant in the Plan
                  ("Elective Contributions"). Elective Contributions are
                  limited from two to ten percent of the participant's
                  compensation. The maximum salary reduction amount for 1998
                  and 1997 is $10,000 and $9,500, respectively.

                  The Company, at its discretion, may make matching
                  contributions to the Plan. The Company discontinued matching
                  contributions on October 2, 1998 in conjunction with the
                  filing of a pre-negotiated plan of reorganization under
                  Chapter 11 of the U.S. Bankruptcy Code ("Plan of
                  Reorganization") on December 4, 1998. See notes 7 and 10. The
                  Company has not reinstituted matching contributions in 1999.
                  Prior to October 2, 1998, the amount of the matching
                  contribution was $.50 for each $1 contributed up to a maximum
                  amount of 2% of a participant's compensation. The Company, at
                  its discretion, may also make a profit sharing contribution
                  which is allocated in accordance with the safe harbor for
                  permitted disparity. The Company has not exercised its
                  discretion to make profit sharing contributions. Any Company
                  profit sharing contributions and matching contributions are
                  referred to as "Non-Elective Contributions". The aggregate
                  amount (determined on an annual basis) of Elective
                  Contributions to the Plan and other Company retirement plans
                  and Non-Elective Contributions to the Plan and other Company
                  retirement plans on behalf of the participant are limited to
                  the lesser of $30,000 or 25% of the participant's annual
                  compensation.

         (c)         PARTICIPANT ACCOUNTS

                  Each participant's account is credited with the participant's
                  Elective Contributions and an allocation of the Company's
                  matching contribution and Plan earnings (losses). Allocations
                  are based on Elective Contributions, as defined. Company
                  matching contributions forfeited by terminated employees are
                  used to reduce any future matching contributions of the
                  Company.


                                       6

<PAGE>   9

                    HEARTLAND WIRELESS COMMUNICATIONS, INC.
                                  401(k) PLAN

                         Notes to Financial Statements

                           December 31, 1998 and 1997

         (d)         INVESTMENT PROGRAM AND VESTING

                  The Plan allowed participants to direct the investments of
                  their Elective Contributions into five different investment
                  options during 1998 and 1997.

                  The investment programs of the Plan were as follows:

                  o        Washington Mutual Investors Fund - invests in high
                           quality common stocks and securities convertible
                           into such common stock. The stated investment
                           objective of the fund is to produce income and to
                           provide an opportunity for growth of principal
                           consistent with sound common stock investing.

                  o        The Growth Fund of America - invests in a
                           diversified portfolio consisting primarily of common
                           stocks, with some assets also held in securities
                           convertible into common stocks, cash and cash
                           equivalents, debt securities, or nonconvertible
                           preferred stocks. The fund's investment objective is
                           growth of capital.

                  o        The Investment Company of America Fund - invests
                           primarily in common stocks; however, assets are also
                           held in securities convertible into common stocks,
                           debt securities, cash or cash equivalents, U.S.
                           Government securities, private placement securities
                           or nonconvertible preferred stock. The fund attempts
                           to achieve its investment objective of long-term
                           growth of capital and income by giving more weight
                           to the possibilities of appreciation and potential
                           dividends than current yield.

                  o        The Bond Fund of America - invests substantially all
                           of its assets in marketable corporate debt
                           securities, U.S. Government securities,
                           mortgage-related securities, other asset-backed
                           securities and cash or money market instruments,
                           with at least approximately two-thirds of the fund's
                           total assets usually invested in bonds. The fund's
                           objective is to provide as high a level of current
                           income as is consistent with the preservation of
                           capital.

                  o        Goldman Sachs Money Market Fund - invests in cash
                           and cash equivalents such as commercial paper,
                           commercial bank obligations, and securities of the
                           U.S. Government, its agencies and instrumentalities.
                           The objective of this fund is to provide as high a
                           level of current income as is consistent with the
                           preservation of capital.

                  Elective Contributions by the participant are immediately
                  fully vested and nonforfeitable. A participant's share of
                  Company matching contributions vests 20 percent after each
                  year of service, with the participant being fully vested
                  after completing five years of service.


                                       7

<PAGE>   10

                    HEARTLAND WIRELESS COMMUNICATIONS, INC.
                                  401(k) PLAN

                         Notes to Financial Statements

                           December 31, 1998 and 1997


         (e)         PAYMENT OF BENEFITS

                  Upon death, disability or termination of service, a
                  participant or designated beneficiary receives a lump sum
                  payment or installments of cash. Benefits are recorded when
                  paid.

(2)      SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

         (a)         BASIS OF ACCOUNTING

                  The accompanying financial statements have been prepared on
                  the accrual method of accounting.

         (b)         VALUATION OF INVESTMENTS

                  All investments are stated at fair value based on quoted
                  market prices. Purchases and sales of securities are recorded
                  on a trade date basis. Interest and dividends are recorded on
                  an accrual basis. Expenses relating to the purchase or sale
                  of investment securities are added to the cost or deducted
                  from the proceeds, respectively.

         (c)         USE OF MANAGEMENT ESTIMATES

                  The preparation of the financial statements, in conformity
                  with generally accepted accounting principles, requires
                  management to make estimates and assumptions that affect the
                  reported amounts of assets and liabilities and disclosure of
                  contingent assets and liabilities at the date of the
                  financial statements and the reported amounts of additions to
                  and deductions from net assets during the reporting period.
                  Actual results could differ from those estimates.

         (d)         EXPENSES OF THE PLAN

                  The expenses of administration of the Plan, including the
                  fees of the trustee, are paid by the Company. The Company
                  paid $16,670 and $18,979 in fees relating to the Plan in 1998
                  and 1997, respectively.

(3)      PLAN TERMINATION

         Although it has not expressed an intent to do so, the Company has the
         right under the Plan to terminate the Plan. Upon termination,
         participants will become fully vested in their accounts.

(4)      TAX STATUS

         The Internal Revenue Service has determined and informed the Company
         by a letter dated August 21, 1997, that the Plan is designed in
         accordance with applicable sections of the Internal Revenue Code
         (IRC). The Plan administrator believes that the Plan is currently
         being operated in compliance with the applicable requirements of the
         IRC.


                                       8

<PAGE>   11

                     HEARTLAND WIRELESS COMMUNICATIONS, INC.
                                  401(k) PLAN

                         Notes to Financial Statements

                           December 31, 1998 and 1997


         The federal income tax status of the participants with respect to
         contributions to the Plan is described in information submitted to the
         participants and, subject to certain limitations, such contributions
         are tax deferred.

(5)      INVESTMENTS

         The following table presents the fair value of the Plan's investments:

<TABLE>
<CAPTION>
                                                          DECEMBER 31, 1998       DECEMBER 31, 1997
                                                        ----------------------- -----------------------
                                                         NUMBER OF      FAIR     NUMBER OF     FAIR
                                                        SHARES/UNITS    VALUE   SHARES/UNITS   VALUE
                                                        ------------ ---------- ------------ ----------
<S>                                                     <C>          <C>        <C>          <C>
                 Washington Mutual Investors Fund             4,212     138,606       2,039      63,837
                 The Growth Fund of America                   6,939     155,436       3,106      59,871
                 The Investment Company of
                     America Fund                             3,357     104,307       1,456      43,050
                 The Bond Fund of America                     2,540      34,569         490       6,901
                 Goldman Sachs Money Market Fund             20,167      20,167       8,221       8,221
                 Heartland Wireless Communications,
                     Inc. Common Stock                      131,107       2,622      60,264     104,164
</TABLE>

(6)      REFUNDS PAYABLE

         At December 31, 1998 and 1997, the Plan has recorded refunds payable
         of $13,323 and $16,022, respectively. The refunds relate to amounts
         due to certain employees of the Company based upon nondiscrimination
         tests applicable to the Plan. The Company paid the $13,323 and $16,022
         subsequent to December 31, 1998 and 1997, respectively, to maintain
         compliance with the applicable requirements of the IRC.

(7)      LIQUIDITY OF PLAN SPONSOR

         The Company's Plan of Reorganization was confirmed by the U.S.
         Bankruptcy Court for the District of Delaware on March 15, 1999. The
         Plan of Reorganization became effective on April 1, 1999. See note 10.

(8)      EMPLOYER MATCH

         The Company discontinued matching contributions, which are
         discretionary, on October 2, 1998 in conjunction with the filing of
         its Plan of Reorganization. In March 1999, the Company transferred all
         participant balances acquired from matching contributions from
         Heartland Wireless Communications, Inc. Common Stock to the Goldman
         Sachs Money Market Fund.

(9)      COMMON STOCK LISTING

         On October 15, 1998, The Nasdaq Stock Market, Inc. notified the
         Company that its common stock,


                                       9

<PAGE>   12

                     HEARTLAND WIRELESS COMMUNICATIONS, INC.
                                  401(k) PLAN

                         Notes to Financial Statements

                           December 31, 1998 and 1997


         listed under the symbol "HARTQ," would no longer be listed on the
         Nasdaq National Stock Market, effective at the close of business on
         that day. All shares of the Company's common stock issued and
         outstanding at April 1, 1999, were canceled pursuant to the Plan of
         Reorganization. See note (10). The Company's common stock that was
         issued to certain creditors under the Plan of Reorganization currently
         is quoted on the OTC Bulletin Board quotation system under the symbol
         "NCNX". The Company has applied for listing on the Nasdaq National
         Stock Market, although there can be no assurance that such application
         will be accepted.

(10)     FINANCIAL RESTRUCTURING

         On December 4, 1998, the Company filed a pre-negotiated Plan of
         Reorganization under Chapter 11 of the U.S. Bankruptcy Code in the
         United States Bankruptcy Court for the District of Delaware (the
         "Bankruptcy Court"). The Plan of Reorganization was approved by all
         classes of creditors voting on the Plan of Reorganization and, on
         March 15, 1999, was confirmed by the Bankruptcy Court. The Plan of
         Reorganization became effective on April 1, 1999 (the "Effective
         Date").

         Under the Plan of Reorganization, as of the Effective Date, all of the
         common stock, options and warrants of Heartland Wireless
         Communications, Inc. (the "Old Common Stock") were canceled and the
         Company issued 10,000,000 shares of new common stock. Holders of the
         Company's 13% notes and 14% notes received 9,700,000 shares of new
         common stock and holders of the Company's 9% convertible notes
         received 300,000 shares of new common stock. Holders of the
         convertible notes also received warrants to purchase 825,000 shares of
         new common stock at a per share exercise price of $27.63, subject to
         adjustment in the event of certain sales of stock or assets of the
         Company.

         Holders of the Old Common Stock were granted the right to receive
         warrants to purchase 275,000 shares of new common stock at a per share
         exercise price of $27.63, subject to adjustment in the event of
         certain sales of stock or assets of the Company. Receipt by holders of
         Old Common Stock of such warrants is subject to certain pending
         securities litigation claims as set forth in the Plan of
         Reorganization.


                                      10

<PAGE>   13

                                                                     SCHEDULE 1


                    HEARTLAND WIRELESS COMMUNICATIONS, INC.
                                  401(k) PLAN

           Item 27a - Schedule of Assets Held for Investment Purposes

                               December 31, 1998

<TABLE>
<CAPTION>
                                                               NUMBER
          IDENTITY OF ISSUE, BORROWER, LESSOR                 OF SHARES               CURRENT
                   OR SIMILAR PARTY                            /UNITS       COST       VALUE
- --------------------------------------------------           ----------  ----------  ----------
<S>                                                          <C>         <C>         <C>
Washington Mutual Investors Fund                                  4,212  $  132,139     138,606
The Growth Fund of America                                        6,939     140,094     155,436
The Investment Company of America Fund                            3,357      98,896     104,307
The Bond Fund of America                                          2,540      34,564      34,569
Goldman Sachs Money Market Fund                                  20,167      20,167      20,167
Heartland Wireless Communications, Inc.
    Common Stock*                                               131,107       3,367       2,622
                                                                         ----------  ----------
                Total assets held for investment                         $  429,227     455,707
                                                                         ==========  ==========
</TABLE>

*Party-in-interest


See accompanying independent auditors' report.


                                      11

<PAGE>   14

                                                                     SCHEDULE 2


                    HEARTLAND WIRELESS COMMUNICATIONS, INC.
                                  401(k) PLAN

                 Item 27d - Schedule of Reportable Transactions

                      For the year ended December 31, 1998


<TABLE>
<CAPTION>
                                                                                                                           CURRENT
                                             AGGREGATE                               EXPENSE                   VALUE AT      NET
                                             NUMBER OF     PURCHASE     SELLING   INCURRED WITH   COST OF    TRANSACTION   GAIN OR
                Description                 TRANSACTIONS     PRICE       PRICE     TRANSACTION     ASSETS        DATE       (LOSS)
- ------------------------------------------  ------------   ---------   ----------  -----------  -----------   ----------  ---------

<S>                                         <C>            <C>         <C>         <C>          <C>           <C>         <C>
Purchases:
    The Growth Fund of America                       34    $ 117,884           --           --      117,884      117,884         --
    Nucentrix Broadband Networks,
       Inc. common stock*                            18    $  59,015           --           --       59,015       59,015         --
    The Investment Company of America
       Fund                                          39    $  83,730           --           --       83,730       83,730         --
    Washington Mutual Investors Fund                 38    $ 108,629           --           --      108,629      108,629         --
    Goldman Sachs Money Market Fund                 358    $ 781,864           --           --      781,864      781,864         --
    The Bond Fund of America                         44    $  34,321           --           --       34,321       34,321         --

Sales:
    Goldman Sachs Money Market Fund                 269    $      --      772,693           --      772,692      772,692         --
    The Growth Fund of America                       20    $      --       37,656           --       33,887       37,656      3,769
    Washington Mutual Investors Fund                 17    $      --       37,787           --       31,624       37,787      6,163
    The Investment Company of America
       Fund                                          15    $      --       26,706           --       23,629       26,706      3,077
    Heartland Wireless Communications, Inc.
       Inc. common stock*                            20    $      --       25,196           --      121,179       25,196    (95,983)
</TABLE>


*Party-in-interest

See accompanying independent auditors' report.



                                       12

<PAGE>   15

                                   SIGNATURES


The Plan. Pursuant to the requirements of the Securities Exchange Act of 1934,
the trustees (or other persons who administer the employee benefit plan) have
duly caused this annual report to be signed on its behalf by the undersigned
hereunto duly authorized.


Date: June 30, 1999               HEARTLAND WIRELESS COMMUNICATIONS, INC.
                                  401(k) PLAN

                                  By: Nucentrix Broadband Networks, Inc.,
                                      Plan Administrator



                                  By:  /s/ MARJEAN HENDERSON
                                     --------------------------------------
                                      Marjean Henderson
                                      Senior Vice President and Chief
                                      Financial Officer



                                      13

<PAGE>   16

                                 EXHIBIT INDEX

<TABLE>
<CAPTION>
Exhibit Number         Description
- --------------         -----------
<S>                    <C>

    *23                Consent of KPMG LLP
</TABLE>




- --------------------
*Filed herewith




<PAGE>   1
                                                                     EXHIBIT 23



                         INDEPENDENT AUDITORS' CONSENT


The Plan Administrator
Heartland Wireless Communications, Inc.
401(k) Plan:

We consent to incorporation by reference in the Registration Statement (No.
333-05943) on Form S-8 of our report dated June 4, 1999, relating to the
statements of net assets available for benefits of the Heartland Wireless
Communications, Inc. 401(k) Plan as of December 31, 1998 and 1997, and the
related statements of changes in net assets available for benefits for the
years then ended, and all related schedules, which report appears in the
December 31, 1998 annual report on Form 11-K of the Heartland Wireless
Communications, Inc. 401(k) Plan filed by Nucentrix Broadband Networks, Inc.
(formerly Heartland Wireless Communications, Inc.).



                                 /s/ KPMG LLP

Dallas, Texas
June 28, 1999


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