METRICOM INC / DE
10-K/A, 1997-12-23
RADIO & TV BROADCASTING & COMMUNICATIONS EQUIPMENT
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<PAGE>   1

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                   FORM 10-K/A

   
                                 AMENDMENT NO. 2
    

              ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


  For the Fiscal Year Ended                            Commission File Number
      December 31, 1996                                        0-19903




                                 METRICOM, INC.
             (Exact name of Registrant as specified in its charter)


            DELAWARE                                     77-0294597
  (State or other jurisdiction of              (IRS Employer Identification No.)
  incorporation or organization)


                 980 UNIVERSITY AVENUE, LOS GATOS, CA 95030-2375
          (Address of principal executive offices, including zip code)

                                 (408) 399-8200
              (Registrant's telephone number, including area code)

        Securities registered pursuant to Section 12(b) of the Act: NONE

           Securities registered pursuant to Section 12(g) of the Act:
                     COMMON STOCK, $.001 PAR VALUE PER SHARE

         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 reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes x  No

         Indicate by check mark if disclosure of delinquent filers pursuant to
Item 405 of Regulation S-K is not contained herein, and will not be contained,
to the best of Registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K. ___

         The approximate aggregate market value of the Common Stock held by
non-affiliates of the Registrant, based upon the last sale price of the Common
Stock reported on the Nasdaq National Market on March 17, 1997 was $94,275,297.

         The number of shares of Common Stock outstanding as of March 17, 1997
was 13,599,613.
<PAGE>   2
                   SPECIAL NOTE ON FORWARD-LOOKING STATEMENTS

         This Annual Report on Form 10-K contains forward-looking statements
that involve risks and uncertainties. The Company's actual results could differ
materially from those discussed here. Factors that could cause or contribute to
such differences include, but are not limited to, those factors identified below
under "Item 1 -- Business -- Risk Factors."


                       DOCUMENTS INCORPORATED BY REFERENCE

         Certain portions of the Metricom, Inc. Annual Report to Stockholders
for the fiscal year ended December 31, 1996 (the "Annual Report") are
incorporated by reference into Part II of this Annual Report on Form 10-K.
Certain parts of the Metricom, Inc. Proxy Statement relating to the annual
meeting of stockholders to be held on May 1, 1997 (the "Proxy Statement") are
incorporated by reference into Part III of this Annual Report on Form 10-K.


                                       2.
<PAGE>   3
                                     PART IV

ITEM 14 - EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORT ON FORM 8-K.

         (a)      FINANCIAL STATEMENTS.

         The consolidated financial statements and related notes, together with
the report thereon of Arthur Andersen LLP, independent public accountants, are
incorporated by reference herein from the Annual Report.

         (b)      REPORTS ON FORM 8-K.

         No reports on Form 8-K were filed during the last quarter of the fiscal
year ended December 31, 1996.

         (c)      EXHIBITS.


EXHIBIT
NUMBER                                  EXHIBIT

  3.1(9)          Restated Certificate of Incorporation of the Company, as
                  amended.

  3.2(1)          Bylaws of the Company.

  4.1             Reference is made to Exhibits 3.1 and 3.2.

  4.2(1)          Registration Rights Agreement between the Company and the
                  other parties named therein, dated as of June 23, 1986, as
                  amended.

  4.3(1)          Specimen stock certificate.

  4.4(5)          Fifth Amendment to Registration Rights Agreement.

  4.5(5)          Sixth Amendment to Registration Rights Agreement.

  4.6(10)         Form of 8% Convertible Subordinated Note due 2003.

  4.7(10)         Indenture, dated as of August 15, 1996, between the Company
                  and U.S. Trust Company of California, N.A.

 10.1(1)          Form of Indemnity Agreement entered into between the Company
                  and its directors and officers, with related schedule.

 10.2(2)(5)       1988 Stock Option Plan (the "Option Plan"), as amended
                  November 1, 1993.

 10.3(1)(2)       Form of Incentive Stock Option Agreement under the Option
                  Plan.

 10.4(1)(2)       Form of Supplemental Stock Option Agreement under the Option
                  Plan.

 10.5(1)(2)       Form of Notice of Exercise under the Option Plan, as amended.

 10.6(1)          Form of Restricted Stock Purchase Agreement and promissory
                  note under the Option Plan.

 10.7(1)          Form of Market Stand-Off Agreement between the Company and
                  various holders of Common Stock.

 10.8(1)(2)       1991 Employee Stock Purchase Plan.


                                       3.
<PAGE>   4
EXHIBIT
NUMBER                                  EXHIBIT

 10.9(1)          Form of Co-Sale Agreement between the Company and various
                  holders of Common Stock, with related schedule.

10.10(1)          Form of Stock Repurchase Agreement between the Company and
                  various holders of Common Stock, with related schedule.

10.11(1)          Form of Series C Preferred Stock Purchase Warrant between the
                  Company and various investors, with related schedule.

10.12(1)          Manufacturing, Supply and Marketing Agreement between the
                  Company, Mitsui & Co., Ltd., Mitsui Comtek Corp. and Oi
                  Electric Co., Ltd. dated as of March 12, 1991.

10.13(1)          Standard Industrial Lease between the Company and Pen Nom I
                  Corporation dated as of October 17, 1991.

10.14(3)          Agreement between the Company and Southern California Edison
                  dated October 1, 1992.

10.15(2)(5)       1993 Non-Employee Directors' Stock Option Plan, as amended
                  November 1, 1993 (the "Directors' Plan").

10.16(2)(3)       Form of Supplemental Stock Option under the Directors' Plan.

10.17(4)          Purchase Agreement, dated October 3, 1993, between the
                  Company and Vulcan Ventures Incorporated.

10.18(4)          Warrant to Purchase 408,333 shares of Common Stock, dated
                  October 28, 1993.

10.19(4)          Purchase Agreement, dated October 8, 1993, between the
                  Company and Donald H. Rumsfeld.

10.20(5)          Common Stock Purchase Warrant for 350,000 shares dated March
                  25, 1993 granted to Sterling Payot Company.

10.21(5)          Common Stock Purchase Warrant for 100,000 shares dated
                  February 19, 1993 granted to Sterling Payot Company.

10.22(5)          Letter Agreements between the Company and Sterling Payot
                  Company dated February 19, 1993 and September 15, 1993.

10.23(6)          Purchase Agreement, dated February 18, 1994, between the
                  Company and Microsoft Corporation.

10.24(8)          Common Stock Purchase Agreement for 200,000 shares dated
                  September 27, 1994 granted to Sterling Payot Company.

10.25(8)          Letter Agreement between the Company and Sterling Payot
                  Company dated October 31, 1994.

10.26(7)          Management Agreement of Metricom DC, L.L.C.

10.27(8)          Option Agreement and Agreement and Plan of Reorganization,
                  dated as of February 7, 1996, among the Company, Overall
                  Wireless and the sole stockholder of Overall Wireless.


                                       4.
<PAGE>   5
EXHIBIT
NUMBER                                  EXHIBIT

10.28(8)          Loan and Security Agreement, dated as of February 7, 1996,
                  among the Company, Overall Wireless and the sole stockholder 
                  of Overall Wireless.

10.29(10)         Registration Rights Agreement, dated as of August 28, 1996,
                  among the Company, Furman Selz LLC and Feshbach Brothers
                  Investor Services, Inc.

10.30(10)         Placement Agreement, dated as of August 20, 1996, among the
                  Company, Furman Selz LLC and Feshbach Brothers Investor
                  Services, Inc.

10.31(11)         Letter Agreement, dated as of January 23, 1997, between the
                  Company and Sterling Payot Company

 13.1             Portions of the Company's Annual Report to Stockholders.

 23.1             Consent of Independent Public Accountants.

 24.1(5)          Power of Attorney.



- ---------- 

(1)      Incorporated by reference from the indicated exhibit in the Company's
         Registration Statement on Form S-1 (File No. 33-46050), as amended.

(2)      Management contract or compensatory plan or arrangement.

(3)      Incorporated by reference from the Company's Form 10-K for the year
         ended December 31, 1992.

(4)      Incorporated by reference from the Company's Form 10-Q for the quarter
         ended October 31, 1993.

(5)      Incorporated by reference from the Company's Form 10-K for the year
         ended December 31, 1993.

(6)      Incorporated by reference from the Company's Form 10-K/A Amendment No.
         1 to the Company's Form 10-K for the year ended December 31, 1993.

(7)      Incorporated by reference from the Company's Form 10-Q for the quarter
         ended June 30, 1995.

(8)      Incorporated by reference from the Company's Form 10-Q for the quarter
         ended June 28, 1996.

(9)      Incorporated by reference from the Company's Form 10-Q for the quarter
         ended September 27, 1996.

(10)     Incorporated by reference from the Company's Form 8-K filed September
         11, 1996.

(11)     Incorporated by reference from the Company's Form 10-K for the year
         ended December 31, 1996.


                                       5.
<PAGE>   6

                                   SIGNATURES

   
        Pursuant to the requirements of Section 13 or 15(d) of the Securities
Act of 1934, as amended, the Registrant has duly caused this Report on Form
10K/A to be signed on its behalf by the undersigned, thereunto duly authorized
on the 22nd day of December, 1997.
    

                                        METRICOM, INC.

                                        
   
                                        By: /s/ Vanessa Wittmann
    
                                            ---------------------------------
   
                                            Vanessa Wittmann
                                            Vice President of Finance
                                            (Principal Financial and 
                                            Accounting Officer)
    


                                       6.
<PAGE>   7
                                INDEX TO EXHIBITS


<TABLE>
<CAPTION>
EXHIBIT
NUMBER                                           EXHIBIT                                       PAGE
<S>               <C>                                                                          <C>
  3.1(9)          Restated Certificate of Incorporation of the Company, as
                  amended.

  3.2(1)          Bylaws of the Company.

  4.1             Reference is made to Exhibits 3.1 and 3.2.

  4.2(1)          Registration Rights Agreement between the Company and the
                  other parties named therein, dated as of June 23, 1986, as
                  amended.

  4.3(1)          Specimen stock certificate.

  4.4(5)          Fifth Amendment to Registration Rights Agreement.

  4.5(5)          Sixth Amendment to Registration Rights Agreement.

  4.6(10)         Form of 8% Convertible Subordinate Note due 2003.

  4.7(10)         Indenture, dated as of August 15, 1996, between the Company
                  and U.S. Trust Company of California, N.A.

 10.1(1)          Form of Indemnity Agreement entered into between the Company
                  and its directors and officers, with related schedule.

 10.2(2)(5)       1988 Stock Option Plan (the "Option Plan"), as amended
                  November 1, 1993.

 10.3(1)(2)       Form of Incentive Stock Option Agreement under the Option
                  Plan.

 10.4(1)(2)       Form of Supplemental Stock Option Agreement under the Option
                  Plan.

 10.5(1)(2)       Form of Notice of Exercise under the Option Plan, as amended.

 10.6(1)          Form of Restricted Stock Purchase Agreement and promissory
                  note under the Option Plan.

 10.7(1)          Form of Market Stand-Off Agreement between the Company and
                  various holders of Common Stock.

 10.8(1)(2)       1991 Employee Stock Purchase Plan.

 10.9(1)          Form of Co-Sale Agreement between the Company and various
                  holders of Common Stock, with related schedule.

10.10(1)          Form of Stock Repurchase Agreement between the Company and
                  various holders of Common Stock, with related schedule.

10.11(1)          Form of Series C Preferred Stock Purchase Warrant between the
                  Company and various investors, with related schedule.

10.12(1)          Manufacturing, Supply and Marketing Agreement between the
                  Company, Mitsui & Co., Ltd., Mitsui Comtek Corp. and Oi
                  Electric Co., Ltd. dated as of March 12, 1991.
</TABLE>


                                       7.
<PAGE>   8
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                                           EXHIBIT                                       PAGE
<S>               <C>                                                                          <C>
10.13(1)          Standard Industrial Lease between the Company and Pen Nom I
                  Corporation dated as of October 17, 1991.

10.14(3)          Agreement between the Company and Southern California Edison
                  dated October 1, 1992.

10.15(2)(5)       1993 Non-Employee Directors' Stock Option Plan, as amended
                  November 1, 1993 (the "Directors' Plan").

10.16(2)(3)       Form of Supplemental Stock Option under the Directors' Plan.

10.17(4)          Purchase Agreement, dated October 3, 1993, between the
                  Company and Vulcan Ventures Incorporated.

10.18(4)          Warrant to Purchase 408,333 shares of Common Stock, dated
                  October 28, 1993.

10.19(4)          Purchase Agreement, dated October 8, 1993, between the
                  Company and Donald H. Rumsfeld.

10.20(5)          Common Stock Purchase Warrant for 350,000 shares dated March
                  25, 1993 granted to Sterling Payot Company.

10.21(5)          Common Stock Purchase Warrant for 100,000 shares dated
                  February 19, 1993 granted to Sterling Payot Company.

10.22(5)          Letter Agreements between the Company and Sterling Payot
                  Company dated February 19, 1993 and September 15, 1993.

10.23(6)          Purchase Agreement, dated February 18, 1994, between the
                  Company and Microsoft Corporation.

10.24(8)          Common Stock Purchase Agreement for 200,000 shares dated
                  September 27, 1994 granted to Sterling Payot Company.

10.25(8)          Letter Agreement between the Company and Sterling Payot
                  Company dated October 31, 1994.

10.26(7)          Management Agreement of Metricom DC, L.L.C.

10.27(8)          Option Agreement and Agreement and Plan of Reorganization,
                  dated as of February 7, 1996, among the Company, Overall
                  Wireless and the sole stockholder of Overall Wireless.

10.28(8)          Loan and Security Agreement, dated as of February 7, 1996,
                  among the Company, Overall Wireless and the sole stockholder of
                  Overall Wireless.

10.29(10)         Registration Rights Agreement, dated as of August 28, 1996,
                  among the Company, Furman Selz LLC and Feshbach Brothers
                  Investor Services, Inc.

10.30(10)         Placement Agreement, dated as of August 20, 1996, among the
                  Company, Furman Selz LLC and Feshbach Brothers Investor
                  Services, Inc.

10.31(11)         Letter Agreement, dated as of January 23, 1997, between the
                  Company and Sterling Payot Company
</TABLE>


                                       8.
<PAGE>   9
   
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                                           EXHIBIT                                       
<S>               <C>                                                                         
 13.1             Portions of the Company's Annual Report
                  to Stockholders.......................................................       

 23.1             Consent of Independent Public Accountants.............................      

 24.1(5)          Power of Attorney.
</TABLE>
    

- ----------
(1)      Incorporated by reference from the indicated exhibit in the Company's
         Registration Statement on Form S-1 (File No. 33-46050), as amended.

(2)      Management contract or compensatory plan or arrangement.

(3)      Incorporated by reference from the Company's Form 10-K for the year
         ended December 31, 1992.

(4)      Incorporated by reference from the Company's Form 10-Q for the quarter
         ended October 31, 1993.

(5)      Incorporated by reference from the Company's Form 10-K for the year
         ended December 31, 1993.

(6)      Incorporated by reference from the Company's Form 10-K/A Amendment No.
         1 to the Company's Form 10-K for the year ended December 31, 1993.

(7)      Incorporated by reference from the Company's Form 10-Q for the quarter
         ended June 30, 1995.

(8)      Incorporated by reference from the Company's Form 10-Q for the quarter
         ended June 28, 1996.

(9)      Incorporated by reference from the Company's Form 10-Q for the quarter
         ended September 27, 1996.

(10)     Incorporated by reference from the Company's Form 8-K filed September
         11, 1996.

(11)     Incorporated by reference from the Company's Form 10-K for the year
         ended December 31, 1996.


                                       9.

<PAGE>   1
                                                                    EXHIBIT 13.1

                      SELECTED CONSOLIDATED FINANCIAL DATA
                      (IN THOUSANDS, EXCEPT PER SHARE DATA)


<TABLE>
<CAPTION>
                                                      YEAR ENDED DECEMBER 31,
                                   ------------------------------------------------------------
                                     1992         1993         1994         1995         1996
                                   --------     --------     --------     --------     --------
<S>                                <C>          <C>          <C>          <C>          <C>
STATEMENT OF OPERATIONS DATA:

Revenues:
  Product revenues ............    $  3,423     $  8,173     $ 19,580     $  4,995     $  4,996
  Service revenues ............          --           --           27          789        2,158
  Development contract
    revenues ..................       2,982        1,884        1,957           --           --
                                   --------     --------     --------     --------     --------
    Total revenues ............       6,405       10,057       21,564        5,784        7,154
                                   --------     --------     --------     --------     --------

Costs and expenses:
  Cost of product revenues ....       3,197        6,401       15,116        3,134        2,528
  Cost of service revenues ....          --           --        1,244        9,360       16,587
  Cost of development
    contract revenues .........       2,894        1,932        1,890           --           --
  Research and development ....       1,809        3,256        8,668        9,145        9,896
  Selling, general and
    administrative ............       3,366        5,027        9,695       12,029       19,495
                                   --------     --------     --------     --------     --------
    Total costs and expenses...      11,266       16,616       36,613       33,668       48,506
                                   --------     --------     --------     --------     --------

    Loss from operations ......      (4,861)      (6,559)     (15,049)     (27,884)     (41,352)
Interest expense ..............          --           --           --           --       (1,310)
Interest income, net ..........         408          410        3,300        4,363        3,317
                                   --------     --------     --------     --------     --------
    Net loss ..................    $ (4,453)    $ (6,149)    $(11,749)    $(23,521)    $(39,345)
                                   ========     ========     ========     ========     ========

Net loss per share ............    $  (0.61)    $  (0.74)    $  (0.96)    $  (1.79)    $  (2.93)
                                   ========     ========     ========     ========     ========

Weighted average shares
 outstanding ..................       7,286        8,353       12,202       13,140       13,413


<CAPTION>
                                                       AS OF DECEMBER 31,
                                   ------------------------------------------------------------
                                     1992         1993         1994         1995         1996
                                   --------     --------     --------     ---------    --------
<S>                                <C>          <C>          <C>          <C>          <C>
BALANCE SHEET DATA:                                                                
  Cash and investments ....        $ 11,888     $ 25,020     $ 89,588     $ 64,415     $ 65,221
  Working capital .........          14,626       28,545       73,012       46,771       57,738
  Property and equipment...           1,702        1,990       10,170       17,717       33,606
  Total assets ............          17,472       32,483      105,534       86,076      101,799
  Long-term debt ..........              --           --           --           --       45,000
  Stockholders' equity ....          15,739       29,171      101,516       80,374       43,306
</TABLE>


                                  
<PAGE>   2
   
                      MANAGEMENT'S DISCUSSION AND ANALYSIS
                OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
    

OVERVIEW

         Since inception, the Company has devoted significant resources to the
development, deployment and commercialization of its wireless network products
and services. A significant portion of the Company's revenues have been derived
primarily from development contracts and sales of customer-owned networks and
related products, known as UtiliNet, to Southern California Edison ("SCE") and
other utility companies. In September 1995, the Company substantially completed
deployment and commenced commercial service of its Ricochet network throughout
California's Silicon Valley. In 1996, commercial service commenced in other
parts of the San Francisco Bay Area and in the Seattle and Washington, D.C.
metropolitan areas. As of February 28, 1997, there were approximately 10,700
Ricochet subscribers and the Company estimates that its networks covered a
population of approximately 6.1 million people. The Company believes that it
will derive an increasing percentage of its future revenues from Ricochet
products and services.

         The Company has incurred cumulative net losses through December 31,
1996 of approximately $90.0 million. These losses resulted primarily from
expenditures associated with the development, deployment and commercialization
of the Company's wireless network products and services. The Company expects to
incur significant operating losses and to generate negative cash flow from
operating activities during the next several years while it continues to develop
and deploy its Ricochet networks and build its customer base. There can be no
assurance that the Company will achieve or sustain profitability or positive
cash flow from operating activities in a timely manner or at all.

         The Company's future success depends on the successful deployment of
Ricochet in major metropolitan areas of the United States. Deployment in each
metropolitan area will require significant expenditures, a substantial portion
of which is incurred before the realization of revenues from such area. Any
inability to execute, or delays in execution of, such deployment plan could have
a material adverse effect on the Company's business, financial condition and
results of operations. There can be no assurance as to the timing or extent of
the deployment of Ricochet.

         This Management's Discussion and Analysis of Financial Condition and
Results of Operations contains forward-looking statements that involve risks and
uncertainties. The Company's actual results could differ materially from those
discussed here. Factors that could cause or contribute to such differences
include, but are not limited to, those discussed in the section of the Company's
Annual Report on Form 10-K for the year ended December 31, 1996 entitled "Risk
Factors," as well as those in this Annual Report.

RESULTS OF OPERATIONS

         The following table sets forth, for the periods indicated, certain
operational data as a percentage of total revenues:

<TABLE>
<CAPTION>
                                                     YEAR ENDED DECEMBER 31,
                                                    --------------------------
                                                    1994       1995       1996
                                                    ----       ----       ----
<S>                                                 <C>        <C>        <C>
REVENUES:
    Product revenues ..........................      91%         86%        70%
    Service revenues ..........................      --          14         30
    Development contract revenues .............       9          --         --
                                                    ----       ----       ----
        Total revenues ........................     100%        100%       100%
</TABLE>


                                      
<PAGE>   3
   
<TABLE>
<S>                                                 <C>        <C>        <C>
COSTS AND EXPENSES:
    Cost of product revenues ..................       70         54         35
    Cost of service revenues ..................        6        162        232
    Cost of development contract revenues .....        9         --         --
    Research and development ..................       40        158        138
    Selling, general and administrative .......       45        208        273
                                                    ----       ----       ----
        Total costs and expenses ..............      170        582        678
                                                    ----       ----       ----

Loss from operations ..........................      (70)      (482)      (578)
Interest expense ..............................       --         --        (18)
Interest income, net ..........................       15         75         46
                                                    ----       ----       ----

Net loss ......................................      (54)%     (407)%     (550)%
                                                    ====       ====       ====
</TABLE>
    


YEAR ENDED DECEMBER 31, 1996 COMPARED TO YEAR ENDED DECEMBER 31, 1995

         Revenues. Revenues consist of product, service and development contract
revenues. Product revenues are derived from the sale of UtiliNet products and
Ricochet modems and are recognized upon shipment. Service revenues are derived
from subscriber fees and modem rentals for Ricochet and fees for UtiliNet
customer support and are recognized ratably over the service period. Development
contract revenues are recognized when the related development costs are
incurred.

         Total revenues increased to $7.1 million in 1996 from $5.8 million in
1995 primarily due to increased service revenues, which increased to $2.1
million in 1996 from $789,000 in 1995. This increase was due to increases in
Ricochet subscriber fees and modem rentals. Product revenues, derived primarily
from the sale of UtiliNet products, were $5.0 million in 1996 and 1995. A
significant portion of such revenue was derived from SCE, the Company's
principal customer. Revenues from SCE accounted for 72% and 51% of total product
revenues in 1995 and 1996, respectively.

         The Company generated no development contract revenues in 1996 and does
not expect significant development funding in the future.

         Cost of Revenues. Cost of product revenues decreased to $2.5 million in
1996 from $3.1 million in 1995. The cost of product revenues as a percent of
product revenues decreased to 51% in 1996 from 63% in 1995. This decrease was
primarily due to a more favorable product mix of the Company's UtiliNet products
in 1996 and provisions for the write-down of inventory related to certain
Ricochet products in the first quarter of 1995.

   
         Cost of service revenues increased to $16.6 million in 1996 from $9.4
million in 1995. These costs represent certain costs incurred to design and
operate Ricochet networks, the cost of efforts to obtain site agreements for the
Company's network infrastructure and certain costs associated with manufacturing
the Company's network components. The increase is due to a higher level of
Ricochet network deployment in the San Francisco Bay Area and the Seattle and
Washington, D.C. metropolitan areas and activities to obtain necessary site
agreements in 1996 as compared to 1995. These costs are expected to continue to
increase as a result of the continued deployment of Ricochet networks and,
although the Company is making efforts to increase its service revenues through
increased promotional activities and arrangements with new channel partners,
these costs are expected to be greater than Ricochet service revenues for the
foreseeable future.
    

         Research and Development. Research and development expenses increased
to $9.9 million in 1996 from $9.1 million in 1995. The increase was due to
development activities related to enhancements to the technology employed by the
Company's Ricochet networks and development of Ricochet modems. The Company
expects research and development expenses to continue to increase in absolute
dollars in future periods.

         Selling, General and Administrative. Selling, general and
administrative expenses increased to $19.5 million in 1996 from $12.0 million in
1995 primarily due to increased selling expense as a result of personnel
increases and additional efforts to increase the number of Ricochet subscribers.
General and administrative expenses also increased primarily as a result of
personnel increases. These costs are expected to continue to increase as a
result of the continued deployment of Ricochet networks.


                                       
<PAGE>   4
   
         Interest Income and Expense. Interest expense increased to $1.3 million
in 1996 as a result of the issuance of $45 million in principal amount of 8%
Convertible Subordinated Notes due 2003 in August 1996. Interest income
decreased to $3.3 million in 1996 from $4.4 million in 1995 primarily due to a
lower level of cash and cash equivalents in 1996 as compared to 1995.
    

YEAR ENDED DECEMBER 31, 1995 COMPARED TO YEAR ENDED DECEMBER 31, 1994

         Revenues. Total revenues decreased to $5.8 million in 1995 from $21.6
million in 1994 primarily due to lower product revenues, which decreased to $5.0
million in 1995 from $19.6 million in 1994. These decreases were primarily due
to an expected decline in shipments of products to SCE as the majority of a
large distribution automation project was completed in 1994. Revenues from SCE
accounted for 84% and 72% of total product revenues in 1994 and 1995,
respectively.

         Service revenues increased to $789,000 in 1995 from $27,000 in 1994
primarily due to certain fees for UtiliNet customer support, which were
reimbursed under development contract revenues prior to 1995, as well as
Ricochet subscriber fees and modem rentals.

         The Company generated no development contract revenues in 1995 due to
the completion in 1994 of a development contract with SCE that provided
substantially all of the Company's development contract revenue in 1994. The
Company does not expect significant development funding in the future.

         Cost of Revenues. Cost of product revenues decreased to $3.1 million in
1995 from $15.1 million in 1994 due to a decrease in product revenues. Cost of
product revenues as a percentage of product revenues decreased to 63% in 1995
from 77% in 1994. This decrease was primarily due to a more favorable mix of
UtiliNet products and lower provisions in 1995 for the write-down of inventory
related to certain UtiliNet products. The decrease was partially offset by a
lower volume of product shipments in 1995, which affected the Company's ability
to realize economies of scale.

         Cost of service revenues increased to $9.4 million in 1995 from $1.2
million in 1994 primarily due to expenses associated with a higher level of
Ricochet network operations, deployment and site agreement acquisition
activities.

         Research and Development. Research and development expenses increased
to $9.1 million in 1995 from $8.7 million in 1994. The increase was due to
development activities related to Ricochet network equipment and Ricochet
modems. In 1995, research and development expense also included costs to
redesign certain portions of the Company's Ricochet radios and modems as a
result of network performance problems discovered during the initial deployment
of the Ricochet network in the Silicon Valley.

         Selling, General and Administrative. Selling, general and
administrative expenses increased to $12.0 million in 1995 from $9.7 million in
1994 primarily due to increased selling expense as a result of personnel
additions and increased marketing and promotional activity. General and
administrative expenses also increased primarily as a result of increases in
personnel.

         Interest Income, Net. Interest income, net, increased to $4.4 million
in 1995 from $3.3 million in 1994 due to higher commercial interest rates.

LIQUIDITY AND CAPITAL RESOURCES

         Since inception, the Company has devoted significant resources to the
development, deployment and commercialization of wireless network products and
services. As a result, as of December 31, 1996, the Company had incurred $90.0
million of cumulative net losses. The Company's operations have required
substantial capital investments for the purchase of Ricochet network equipment,
Ricochet modems and computer and office equipment. Capital expenditures were
$8.2 million, $8.4 million and $15.9 million in 1994, 1995 and 1996,
respectively. The Company expects that it will continue to have substantial
capital requirements in connection with the development


                                      
<PAGE>   5
   
and deployment of Ricochet networks and efforts to attract Ricochet subscribers.
The Company also expects that, to the extent its subscriber base grows,
increasingly significant capital expenditures will be required to procure
Ricochet modems.
    

         The Company has financed operations primarily through the public and
private sale of equity and convertible debt securities. Since inception, the
Company has completed (i) private placements of preferred stock with net
proceeds to the Company of approximately $18.9 million, of which $3.0 million
was repurchased and the balance converted to Common Stock at the time of the
Company's initial public offering in 1992, (ii) an initial public offering of
Common Stock with net proceeds to the Company of approximately $8.8 million in
1992, (iii) private placements of Common Stock with net proceeds to the Company
of approximately $18.6 million in 1993, (iv) public and private placements of
Common Stock with net proceeds to the Company of approximately $75.2 million in
1994 and (v) a private placement of 8% Convertible Subordinated Notes due 2003
with net proceeds to the Company of approximately $43.4 million in 1996.

         The Company expects to make significant capital expenditures in
connection with the development, deployment and communication of its Ricochet
networks. The Company also expects that to the extent the Ricochet subscriber
base grows, significant capital expenditures will be required to procure
Ricochet modems rented to subscribers. The amount and timing of expenditures,
however, may very significantly depending on numerous factors including market
acceptance; availability of Ricochet radios and modems; availability of
sufficient financial, management, marketing and technical resources, and
technological feasibility. The Company anticipates that its existing cash and
investments, interest income from investments and contributions received from
its existing joint venture partner will be adequate to satisfy its capital
expenditure, operating loss and working capital requirements at least through
1997. The Company believes that additional capital will be required in the
future to fund further deployment and operating activities of Ricochet. There
can be no assurance that such funds would be available on commercially
reasonable terms or at all.

         As of December 31, 1996, the Company had cash and cash equivalents and
short and long term investments of $65.2 million and working capital of $57.7
million. The Company's accounts receivable increased to $1.1 million as of
December 31, 1996 from $439,000 as of December 31, 1995 due to increased
revenues in the first quarter of 1996 as compared to the fourth quarter of 1995.
Inventories decreased to $3.1 million as of December 31, 1996 from $4.5 million
as of December 31, 1995 due to improved inventory management in 1996. The
Company believes that both accounts receivable and inventories will increase in
the future in order to support the deployment and commercialization of Ricochet.

   
         In 1995, Metricom Investments DC, Inc. ("Metricom Investments"), a
subsidiary of the Company, and PepData, Inc. ("PepData"), a subsidiary of
Potomac Electronic Power Company, formed Metricom DC, L.L.C ("Metricom DC") to
own and operate a wireless data communications network in the metropolitan
Washington D.C. area. Metricom Investments contributed $1,000, as well as the
right to use the Company's proprietary technolgy to display and operate a
Ricochet network in the Washington, D.C. area, in exchange for an 80% ownership
interest in Metricom DC. PepData will contribute up to $7.0 million in exchange
for a 20% ownership interest in Metricom DC. Metricom DC will distribute
available cash first to PepData, until PepData has received cumulative
distributions equal to its capital contributions, and second to PepData and
Metricom Investments in proportion to their respective ownership interests. As
of December 31, 1996, PepData had contributed $2.4 million to the joint venture.
    

         In addition, the Company has agreed to loan up to $2.0 million to
Overall Wireless, of which approximately $500,000 had been loaned as of December
31, 1996, in connection with the construction of a wireless communication system
in the 220 to 222 MHz frequency band. The Company has also purchased an option
to acquire Overall Wireless Communications Corporation that will terminate in
July 1997. The additional consideration payable upon exercise of the option
includes a combination of cash and stock valued at $7.3 million in the
aggregate.


                                      
<PAGE>   6
   
                                 METRICOM, INC.
    

                           CONSOLIDATED BALANCE SHEETS
                  (DOLLARS IN THOUSANDS, EXCEPT SHARE AMOUNTS)
                                  

<TABLE>
<CAPTION>
                                                                                              DECEMBER 31,
                                                                                        -----------------------
                                                                                          1995          1996
                                                                                        ---------     ---------
<S>                                                                                     <C>           <C>
ASSETS
Current assets:
         Cash and cash equivalents .................................................    $   5,201     $  15,246
         Short-term investments ....................................................       40,090        46,825
         Accounts receivable, net ..................................................          439         1,126
         Inventories ...............................................................        4,467         3,115
         Prepaid expenses and other ................................................        1,666         1,744
                                                                                        ---------     ---------
                  Total current assets .............................................       51,863        68,056
Property and equipment, net ........................................................       14,923        26,776
Long-term investments ..............................................................       19,124         3,150
Other assets .......................................................................          166         3,817
                                                                                        ---------     ---------
         Total assets ..............................................................    $  86,076     $ 101,799
                                                                                        =========     =========


<CAPTION>
LIABILITIES AND STOCKHOLDERS' EQUITY
<S>                                                                                     <C>           <C>
Current liabilities:
         Accounts payable ..........................................................    $   3,296     $   5,517
         Accrued liabilities .......................................................        1,796         4,801
                                                                                        ---------     ---------
                  Total current liabilities ........................................        5,092        10,318
                                                                                        ---------     ---------

Long-term debt .....................................................................           --        45,000
Other liabilities ..................................................................          510           768
Minority interest ..................................................................          100         2,407
Commitments (Note 5)

Stockholders' equity:
         Preferred Stock, $.001 par value per share:  authorized - 2,000,000 shares;
         issued and outstanding  - none ............................................
Common Stock, $.001 par value per share: authorized - 50,000,000 shares;
         issued and outstanding - 13,291,025 shares in 1995 and 13,555,445
         shares in 1996 ............................................................           13            14
Additional paid-in capital .........................................................      130,831       133,298
Unrealized holding gain (loss) on investments ......................................          155           (36)
Accumulated deficit ................................................................      (50,625)      (89,970)
                                                                                        ---------     ---------
Total stockholders' equity .........................................................       80,374        43,306
                                                                                        ---------     ---------
Total liabilities and stockholders' equity .........................................    $  86,076     $ 101,799
                                                                                        =========     =========
</TABLE>

 The accompanying notes are an integral part of these consolidated statements.


                                      
<PAGE>   7
   
                                 METRICOM, INC.
    

                      CONSOLIDATED STATEMENTS OF OPERATIONS
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                  YEAR ENDED DECEMBER 31,
                                             ----------------------------------
                                               1994         1995         1996
                                             --------     --------     --------
<S>                                          <C>          <C>          <C>
REVENUES:
  Product revenues ......................    $ 19,580     $  4,995     $  4,996
  Service revenues ......................          27          789        2,158
  Development contract revenues .........       1,957           --           --
                                             --------     --------     --------
    Total revenues ......................      21,564        5,784        7,154
                                             --------     --------     --------
COSTS AND EXPENSES:
  Cost of product revenues ..............      15,116        3,134        2,528
  Cost of service revenues ..............       1,244        9,360       16,587
  Cost of development contract revenues..       1,890           --           --
  Research and development ..............       8,668        9,145        9,896
  Selling, general and administrative....       9,695       12,029       19,495
                                             --------     --------     --------
    Total costs and expenses ............      36,613       33,668       48,506
                                             --------     --------     --------
Loss from operations ....................     (15,049)     (27,884)     (41,352)
Interest expense ........................          --           --       (1,310)
Interest income .........................       3,300        4,363        3,317
                                             --------     --------     --------
Net loss ................................    $(11,749)    $(23,521)    $(39,345)
                                             ========     ========     ========
Net loss per share ......................    $   (.96)    $  (1.79)    $  (2.93)
                                             ========     ========     ========
Weighted average shares outstanding .....      12,202       13,140       13,413
                                             ========     ========     ========
</TABLE>

  The accompanying notes are an integral part of these consolidated statements.


                                      
<PAGE>   8
   
                                 METRICOM, INC.
    

                 CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
                             (DOLLARS IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                                  Unrealized
                                                                                    Holding
                                                                   Additional         Gain
                                           COMMON STOCK             Paid-in        (Loss) on      Accumulated
                                      SHARES          Amount        Capital       Investments       Deficit          Total
                                    ----------     -----------    -----------     -----------     -----------     -----------
<S>                                  <C>           <C>            <C>             <C>             <C>             <C>        
BALANCE, DECEMBER 31, 1993.....      9,389,486     $         9    $    44,517     $        --     $   (15,355)    $    29,171
Sale of common stock ..........      2,616,699               3         75,184              --              --          75,187
Exercise of common stock
warrants ......................        869,342               1          8,868              --              --           8,869
Exercise of common stock
options .......................         57,516              --            241              --              --             241
Common stock issued to              
employees .....................         45,634              --            470                                             470
Unrealized holding loss on           
investments ...................             --              --             --            (673)             --            (673)
Net loss ......................             --              --             --              --         (11,749)        (11,749)
                                   -----------     -----------    -----------     -----------     -----------     -----------
BALANCE, DECEMBER 31, 1994.....     12,978,677              13        129,280            (673)        (27,104)        101,516
Exercise of common stock               
warrants ......................         72,896              --             64              --              --              64
Exercise of common stock
options .......................        198,566              --            894              --              --             894
Common stock issued to              
employees .....................         40,886              --            593              --              --             593
Unrealized holding gain on            
investments ...................             --              --             --             828              --             828
Net loss ......................             --              --             --              --         (23,521)        (23,521)
                                   -----------     -----------    -----------     -----------     -----------     -----------
BALANCE, DECEMBER 31, 1995.....     13,291,025              13        130,831             155         (50,625)         80,374
Exercise of common
stock options .................         81,573              --            497              --              --             497
Common stock issued to
employees .....................        110,465               1          1,354              --              --           1,355
Exercise of common stock              
warrants ......................         72,382              --             --              --              --              --
Warrant issued in exchange
for services rendered .........             --              --            616              --              --             616
Unrealized holding loss on
investments ...................             --              --             --            (191)             --            (191)
Net loss ......................             --              --             --              --         (39,345)        (39,345)
                                    ----------     -----------    -----------     -----------     -----------     -----------
BALANCE, DECEMBER 31, 1996.....     13,555,445     $        14    $   133,298     $       (36)    $   (89,970)    $    43,306
                                    ==========     ===========    ===========     ===========     ===========     ===========
</TABLE>

 The accompanying notes are an integral part of these consolidated statements.


                                       
<PAGE>   9
   
                                 METRICOM, INC.
    

                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                             (DOLLARS IN THOUSANDS)


<TABLE>
<CAPTION>
                                                                                       Year Ended December 31,
                                                                                  ----------------------------------
                                                                                    1994         1995         1996
                                                                                  --------     --------     --------
<S>                                                                               <C>          <C>          <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
     Net loss ................................................................    $(11,749)    $(23,521)    $(39,345)
Adjustments to reconcile net loss to net cash used in
     operating activities -
Depreciation and amortization ................................................         634        1,902        4,135
Provision for obsolete inventory .............................................       1,011          523           --
(Increase) decrease in accounts receivable, prepaid
     expenses and other current assets .......................................         321        1,333         (765)
(Increase) decrease in inventories ...........................................      (2,194)      (1,121)       1,352
Increase in accounts payable, accrued liabilities and other
     liabilities .............................................................         706        1,584        5,484
                                                                                  --------     --------     --------
Net cash used in operating activities ........................................     (11,271)     (19,300)     (29,139)
                                                                                  --------     --------     --------
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment ...........................................      (8,180)      (8,421)     (15,910)
(Increase) decrease in other assets ..........................................         (75)          69       (1,463)
(Increase) decrease in investments ...........................................     (39,825)      (4,258)       9,048
                                                                                  --------     --------     --------
Net cash used in investing activities ........................................     (48,080)     (12,610)      (8,325)
                                                                                  --------     --------     --------
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock .......................................      84,767        1,551        1,852
Proceeds from issuance of long-term debt .....................................          --           --       45,000
Debt issuance costs ..........................................................          --           --       (1,650)
Contribution from minority interest ..........................................          --          100        2,307
                                                                                  --------     --------     --------
Net cash provided by financing activities ....................................      84,767        1,651       47,509
                                                                                  --------     --------     --------
Net increase (decrease) in cash and cash equivalents .........................      25,416      (30,259)      10,045
Cash and cash equivalents, beginning of year .................................      10,044       35,460        5,201
                                                                                  --------     --------     --------
Cash and cash equivalents, end of year .......................................    $ 35,460     $  5,201     $ 15,246
                                                                                  ========     ========     ========
</TABLE>

 The accompanying notes are an integral part of these consolidated statements.


                                      
<PAGE>   10
   
                                 METRICOM, INC.
    

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

I.       ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES.

         ORGANIZATION AND BASIS OF PRESENTATION. Metricom, Inc. (the "Company")
designs, develops and markets wireless network products and services that
provide low cost, high performance, easy to use, data communications that can be
used in a broad range of personal computer and industrial applications. The
Company's primary service, Ricochet, provides subscriber-based, wireless data
communications for users of portable and desktop computers and hand-held
computing devices. Ricochet is currently available in the San Francisco Bay
Area, in the Seattle and Washington, D.C. metropolitan areas and in a number of
airports and college and university campuses across the United States. In the
future, the Company plans to deploy Ricochet in major metropolitan areas
throughout the United States. The Company's UtiliNet products provide
customer-owned wireless data communications for industrial control and
monitoring primarily in the electric utility, waste water and natural gas
industries. The Company's UtiliNet products are sold throughout the United
States.

         Since its inception, the Company has incurred significant operating
losses. These losses resulted primarily from expenditures associated with the
development, deployment and commercialization of the Company's wireless network
products and services. The Company expects to incur significant operating losses
and to generate negative cash flows from operating activities during the next
several years while it continues to develop and deploy Ricochet networks and
build its customer base. The ability of the Company to achieve profitability
will depend in part upon the successful and timely deployment of Ricochet in
major metropolitan areas of the United States and its successful marketing, as
to which there can be no assurance. A broad market for wide area wireless data
communications has not yet developed. As a result, the extent of the potential
demand for Ricochet cannot be reliably estimated. In addition, the Company is
subject to additional risks, including the risks of developing technology,
competition from companies with substantially greater financial, technical,
marketing and management resources than the Company and potential changes in the
regulatory environment.

         The accompanying consolidated financial statements include the accounts
of the Company and all subsidiaries after elimination of significant
intercompany accounts and transactions. Certain amounts have been restated from
the previously reported balance to conform to the 1996 presentation. The
preparation of 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 disclosures of
contingent assets and liabilities at the date of the financial statements and
the reported amounts of revenues and expenses during the reporting period.
Actual results could differ from those estimates.

         CASH AND CASH EQUIVALENTS. All highly liquid monetary instruments with
an original maturity of 90 days or less from the date of purchase are considered
to be cash equivalents. Cash paid during fiscal 1994, 1995 and 1996 for interest
and income taxes was not significant.

         CONCENTRATION OF CREDIT RISKS. Financial instruments that may
potentially subject the Company to concentration of credit risk consist
principally of cash and cash equivalents, investments in marketable securities
and accounts receivable. The Company's investment policy limits investments to
short-term, low-risk instruments. A significant portion of accounts receivable
are due from a small number of electric utilities and are unsecured. To date,
the Company has not incurred any significant losses due to uncollectible
accounts receivable.


                                       
<PAGE>   11
   
         INVENTORIES. Inventories are stated at the lower of cost (first-in,
first-out) or market and include purchased parts, labor and manufacturing
overhead. Inventories consisted of the following (in thousands):
    

<TABLE>
<CAPTION>
                                                                                                 DECEMBER 31,
                                                                                       -------------------------------
                                                                                         1995                   1996
                                                                                       ---------              --------
<S>                                                                                    <C>                    <C>     
         Raw materials and component parts.................................            $   1,786              $    656
         Work-in-process...................................................                1,459                 1,606
         Finished goods and consigned inventory............................                1,222                   853
                                                                                       ---------             ---------
         TOTAL ............................................................            $   4,467              $  3,115
                                                                                       =========              ========
</TABLE>

         PROPERTY AND EQUIPMENT. Property and equipment are stated at cost and
are depreciated using the straight-line method over the shorter of their
estimated useful lives of three to five years or the lease term. As of December
31, 1995 and 1996, network equipment included approximately $4.3 million and
$3.8 million, respectively, of raw materials, work-in-process and finished goods
related to network equipment that is manufactured by the Company for its
Ricochet networks. Depreciation of this equipment will commence when it is
placed in service. Property and equipment consisted of the following (in
thousands):

<TABLE>
<CAPTION>
                                                                                                 DECEMBER 31,
                                                                                       -------------------------------
                                                                                         1995                   1996
                                                                                       ---------             ---------
<S>                                                                                    <C>                   <C>      
         Machinery and equipment.............................................          $   4,685             $   7,958
         Network equipment...................................................             10,961                19,118
         Ricochet modems.....................................................                108                 4,158
         Furniture and fixtures..............................................              1,214                 1,290
         Leasehold improvements..............................................                749                 1,082
                                                                                      ----------             ---------
                                                                                          17,717                33,606
         Less--Accumulated depreciation and amortization.....................             (2,794)               (6,830)
                                                                                      ----------             ---------
         TOTAL ..............................................................         $   14,923             $  26,776
                                                                                      ==========             =========
</TABLE>


         In March 1995, the Financial Accounting Standards Board ("FASB") issued
FASB Statement No. 121, "Accounting for the Impairment of Long-Lived Assets and
for Long-Lived Assets to Be Disposed Of" ("Statement 121"). Statement 121
requires that long-lived assets be reviewed for impairment and, if necessary, an
impairment loss be recorded whenever events or changes in circumstances indicate
that the carrying amount of the asset may not be recoverable. Statement 121 is
effective for fiscal year 1996. The adoption of Statement 121 did not have a
material effect on the financial position or results of operations of the
Company.

         ACCRUED LIABILITIES. Accrued liabilities consisted of the following (in
thousands):

<TABLE>
<CAPTION>
                                                                                                  DECEMBER 31,
                                                                                        ------------------------------
                                                                                           1995                  1996
                                                                                        ---------              -------
<S>                                                                                     <C>                    <C>    
         Interest ..........................................................            $      --              $ 1,220
         Employee stock purchase plan.......................................                  241                  299
         Deferred Revenue...................................................                  110                1,021
         Payroll and related................................................                  621                1,148
         Royalties..........................................................                  274                  244
         Sales taxes........................................................                  118                  338
         Warranty...........................................................                  256                  256
         Other..............................................................                  176                  275
                                                                                         --------             --------
         TOTAL .............................................................             $  1,796             $  4,801
                                                                                         ========             ========
</TABLE>

   
         DEBT ISSUANCE COSTS. Debt issuance costs are amortized over the life of
the respective debt instruments. Such amortization is reflected as a component
of interest expense as an adjustment for the yield on the respective debt
instruments.
    

                                      
<PAGE>   12
         REVENUE RECOGNITION. Product revenues are recognized upon shipment.
Cash received from customers in advance of product shipment is deferred as an
accrued liability in the accompanying consolidated balance sheets. Service
revenues consist of subscriber fees and equipment rentals from Ricochet and fees
for UtiliNet customer support and are recognized ratably over the service
period. Development contract revenues are recognized when the related
development costs are incurred (see Note 4).

         RESEARCH AND DEVELOPMENT EXPENDITURES. Research and development
expenditures are charged to operations as incurred.

         NET LOSS PER SHARE. Net loss per share data has been computed using the
weighted average number of shares of common stock outstanding. Common equivalent
shares from options and warrants to purchase common stock have been excluded
from the calculation as their effect would be anti-dilutive.

II.      SHORT-TERM AND LONG-TERM INVESTMENTS.

         The Company's investments in debt and equity securities are considered
available-for-sale and are recorded at their fair value as determined by quoted
market prices with any unrealized holding gains or losses classified as a
separate component of stockholders' equity. Upon sale of the investments, any
previously unrealized gains or losses are recognized in results of operations.
As of December 31, 1996, the aggregate fair value, cost basis and unrealized
holding loss on investments consisted of the following (in thousands):

<TABLE>
<CAPTION>
                                                                                                                UNREALIZED
SECURITY TYPE                                                                   FAIR            COST              HOLDING
                                                                                VALUE           BASIS              LOSS
                                                                                -----           -----              ----
<S>                                                                           <C>             <C>                  <C>     
United States Treasury and Agencies..................................         $ 23,309        $ 23,336             $   (27)
Corporate debt securities............................................           26,666          26,675                  (9)
                                                                              --------        --------            ---------
   TOTAL                                                                      $ 49,975        $ 50,011             $   (36)
                                                                              ========        ========            =========
</TABLE>

         As of December 31, 1996, investments in obligations of the United
States Treasury and Agencies and corporate debt securities had remaining
contractual maturities of 1-2 years.

III.     INVESTMENT IN METRICOM DC, L.L.C.

   
         On June 8, 1995, Metricom Investments DC, Inc. ("Metricom
Investments"), a subsidiary of the Company, and PepData, Inc. ("PepData"), a
subsidiary of Potomac Electric Power Company, formed Metricom DC, L.L.C.
("Metricom DC") to own and operate a Ricochet network in the Washington, D.C.
metropolitan area. Metricom Investments contributed $1,000, as well as the right
to use the Company's proprietary technology to deploy and operate a Ricochet
network in the Washington, D.C. area, in exchange for an 80% ownership interest
in Metricom DC. PepData will contribute up to $7 million in exchange for a 20%
ownership interest in Metricom DC. Metricom DC will distribute available cash
first to PepData, until PepData has received cumulative distributions equal to
its capital contributions, and second to PepData and Metricom Investments in
proportion to their respective ownership interests. As of December 31, 1996,
PepData had contributed $2.4 million to the joint venture, which is reflected as
a minority interest in the accompanying consolidated financial statements.
    

IV.      DEVELOPMENT CONTRACTS.

         In October 1992, the Company entered into a development and supply
agreement with Southern California Edison ("SCE") that superseded a prior
agreement in force since 1986. Under the terms of the new agreement, which
expired in December 1994, SCE provided the Company with funding for certain
development activities. Although SCE will be entitled to utilize the technology
for its own internal purposes, the Company retains title to the technology.

         In connection with the development agreement, the Company agreed to
give specified discounts to SCE on future purchases of standard commercial
equipment for a period of 15 years. Additionally, the Company agreed to pay a
royalty of 2% of its annual gross revenues on sales or leases to third parties
of contractual products, as defined. The Company also agreed to pay a royalty
for the internal use of contractual products at the rate of 2% of the fair value
of the products, as defined. The royalty payment is to be made annually
beginning in 1996. The

                                       
<PAGE>   13
   
royalty payments cease to accrue after 25 years from the date of the last
reimbursement of development activities. Accrued royalties are included in
accrued liabilities in the accompanying consolidated balance sheets.
    

         For the years ended December 31, 1994, 1995 and 1996, combined product
and development contract revenues from SCE accounted for 84%, 72% and 51%,
respectively, of total revenues.

V.       COMMITMENTS.

         The Company leases various facilities and equipment under operating
lease agreements. Rent expense under these agreements for the years ended
December 31, 1994, 1995 and 1996, was approximately $638,000, $1.1 million and
$1.4 million, respectively. The lease agreement for the Company's primary
facility provides for escalating rent payments over a 12-year term ending
February 2004, however rent expense is recognized ratably over the lease term.
As of December 31, 1995 and 1996, the Company had accrued approximately $510,000
and $469,000, respectively, of deferred rental payments under this agreement,
which are included in other liabilities in the accompanying consolidated balance
sheets. Approximate future minimum rental payments under operating lease
agreements are as follows (in thousands):

<TABLE>
<CAPTION>
YEARS ENDING
DECEMBER 31,
<S>                                                                                                           <C>      
1997.............................................................................................             $   1,730
1998.............................................................................................                 1,584
1999.............................................................................................                 1,473
2000.............................................................................................                 1,238
2001.............................................................................................                   982
Thereafter.......................................................................................                 1,680
                                                                                                              ---------
   Total.........................................................................................             $   8,687
                                                                                                              =========
</TABLE>

         The Company has also entered into various agreements with electric
utilities and municipalities for the use of utility poles on which network
equipment is installed. Payment under these agreements is generally contingent
upon the number of network radios installed during the year. Rent expense under
these agreements for the year ended December 31, 1995 and 1996, was
approximately $69,000 and $430,000, respectively.

         In February 1996, the Company purchased an option to acquire Overall
Wireless Communications Corporation ("Overall Wireless"), a corporation that
holds a nationwide, wireless communications license issued by the FCC
authorizing operations on 50 kHz of radio spectrum in the 220 to 222 MHz
frequency band. The Company paid $700,000 for the option and agreed to loan to
Overall Wireless up to $2.0 million for the construction of a system utilizing
the license, of which approximately $500,000 had been loaned as of December 31,
1996. In January 1997, the Company paid $500,000 to extend the option from
January 1997 to July 1997. The additional consideration payable upon exercise of
the option includes a combination of cash and stock valued at $7.3 million in
the aggregate. The Company's ability to exercise the option is conditioned upon
the occurrence of a number of events, including Overall Wireless' completion of
40% of the system prior to July 29, 1997 and approval by the FCC of the transfer
of the license. There can be no assurance that these conditions will be met
prior to expiration of the option. If the option expires unexercised under
certain circumstances, the Company may be required to pay a termination fee of
up to $2.0 million, which may be paid through cancellation of the indebtedness
of Overall Wireless.

VI.      LONG-TERM DEBT.

         On August 28, 1996, the Company issued $45 million principal amount of
unsecured, 8% Convertible Subordinated Notes (the "Notes") due September 15,
2003. Interest is payable semi-annually on March 15 and September 15, commencing
March 15, 1997. The Notes are convertible into shares of the Company's common

                                      
<PAGE>   14
   
stock at a conversion price of $14.55 per share, subject to adjustment in
certain events. The Notes are redeemable, in whole or in part, at the option of
the Company at any time on or after September 15, 1999, at the following
redemption prices if redeemed during the 12- month period commencing September
15 of the years indicated below:
    

<TABLE>
<CAPTION>
            YEAR                                         PERCENTAGE
            <S>                                            <C>  
            1999                                           104.0
            2000                                           102.7
            2001                                           101.3
            2002                                           100.0
</TABLE>

         In the event of a change of control, as defined in the indenture, each
holder of the Notes will have the right to require the Company to purchase all
or any part of such holder's Notes at 101% of the principal amount, plus accrued
and unpaid interest and liquidated damages, if any.

VII.     COMMON STOCK.

         In March 1994, the Company completed a public offering of 2,103,454
shares of common stock at $30.25 per share for aggregate net proceeds of
approximately $59.7 million. Concurrent with the public offering, the Company
completed two registered private placements for the sale of a total of 513,245
shares of common stock at $30.25 per share for aggregate net proceeds of
approximately $15.5 million.

         COMMON STOCK WARRANTS. In September 1994, the Company issued warrants
to purchase 200,000 shares of common stock at $13.75 per share in exchange for
certain investment banking services. These warrants are exercisable in cash or
via a net exercise, expire five years from the date of issuance and provide for
certain registration rights. The Company has the right to repurchase the 100,000
shares of Common Stock underlying the warrants for $0.01 per share. This right
expires on March 31, 1997.

         In connection with a March 1994 registered private placement, the
Company issued an investor a warrant to purchase 75,000 shares of common stock
at $37.50 per share. These warrants are exercisable immediately, expire three
years from the date of issuance and provide for certain registration rights.

         In connection with an October 1993 private placement, the Company
issued an investor a warrant to purchase 408,333 shares of common stock at
$20.00 per share. This warrant was exercised in January 1994.

         In February and March 1993, the Company issued warrants to purchase a
total of 450,000 shares of common stock at $5.75 per share in exchange for
certain investment banking services. In March 1994, 364,463 shares were issued
upon a net exercise of these warrants.

         Upon closing of the Company's initial public offering in May 1992,
warrants to purchase 368,000 shares of Series C preferred stock at $7.81 per
share were converted to warrants to purchase 395,541 shares of common stock at
$7.27 per share. During 1996, 72,382 shares were issued upon a net exercise of
168,451 of these warrants.
As of December 31, 1996, no additional warrants were outstanding.

         STOCK OPTIONS. In March 1988, the Company adopted the 1988 Stock Option
Plan. Under the plan, as amended, the Company is authorized to grant up to
4,119,500 incentive or non-qualified stock options to purchase shares of common
stock. Incentive stock options may be granted to employees at prices not lower
than the market value of the stock at the date of grant. Non-qualified stock
options may be granted to employees, officers, directors and consultants at
prices not lower than 85% of the market value of the stock at the date of the
grant. Options granted under the plan are exercisable at any time, as determined
by the Board of Directors, and will expire no later than ten years from the date
of grant. Options generally vest 25% after the first year and ratably over the
following three years. In January 1996, the Board of Directors approved the
replacement of each outstanding option with a per share exercise price of $14.00
or greater, upon the request of the optionee, with a stock option having an
exercise price of $13.125 per share and certain extended vesting terms. A total
of 982,263 options with exercise prices ranging from $15.00-$28.75 per share
were replaced.

                                      
<PAGE>   15
   
         In February 1993, the Company adopted the 1993 Non-Employee Directors'
Stock Option Plan. Under the plan, as amended, the Company is authorized to
grant up to 300,000 non-qualified stock options to purchase shares of common
stock at the market value at the date of grant. Options granted under the plan
are exercisable in three equal annual installments commencing one year from the
date of grant and will expire no later than 10 years from the date of grant.
    

         During 1993, 1994 and 1995, the Company issued members of the Board of
Directors and Advisory Board options to purchase 75,000, 75,000 and 50,000
shares, respectively, of common stock at fair market value of the stock at the
date of grant. These options vest 25% after the first year and ratably over the
following three years and will expire no later than ten years from the date of
grant.

         Stock option activity under the 1988 Stock Option Plan, the 1993
Non-Employee Directors' Stock Option Plan and options issued to members of the
Board of Directors and Advisory Board for the fiscal years ended December 31,
1994, 1995 and 1996 was as follows:

<TABLE>
<CAPTION>
                                                                           SHARES                                   WEIGHTED
                                                                          AVAILABLE                                 AVERAGE
                                                                         FOR FUTURE             OPTIONS             EXERCISE
                                                                           GRANT              OUTSTANDING            PRICE
                                                                         ----------           -----------           --------
<S>                                                                      <C>                  <C>                    <C>   
Balance, December 31, 1993..................................               974,434            1,578,999              $ 9.90
         Authorized.........................................                75,000                   --                  --
         Grants.............................................              (923,500)             923,500              $18.54
         Exercises..........................................                    --              (57,516)             $ 4.10
         Cancellations......................................                50,331              (50,331)             $ 9.34
                                                                         ---------            ---------              ------
Balance, December 31, 1994..................................               176,265            2,394,652              $13.33
         Authorized.........................................               950,000                   --                  --
         Grants.............................................              (705,250)             705,250              $16.48
         Exercises..........................................                    --             (198,566)             $ 4.53
         Cancellations......................................               253,517             (253,517)             $18.12
                                                                        ----------           ----------              ------
Balance, December 31, 1995..................................               674,532            2,647,819              $14.36
         Authorized.........................................               475,000                   --                  --
         Grants.............................................            (1,050,500)           1,050,500              $13.87
         Exercises..........................................                    --              (85,092)             $ 6.08
         Cancellations......................................               245,358             (245,358)             $18.01
                                                                        ----------            ---------              ------
Balance, December 31, 1996..................................               344,390            3,367,869              $12.45
                                                                       ===========            =========              ======
</TABLE>

                                      
<PAGE>   16
   
         The following table summarizes information concerning stock options
outstanding and exercisable as of December 31, 1996:
    

<TABLE>
<CAPTION>
                                                       Options Outstanding                         Options Exercisable
                                                   -----------------------------              -------------------------------
                                                   Weighted             Weighted                                     Weighted
      Range of                                      Average             Average                                      Average
      Exercise                  Shares             Remaining            Exercise                Shares               Exercise
       Prices                Outstanding              Life                Price               Exercisable              Price
<S>                          <C>                   <C>                  <C>                   <C>                    <C>   
$ 0.20 - $ 3.00                  152,890              3.84                $ 2.54                  152,890             $ 2.54
$ 3.01 - $11.25                  548,911              5.77                $ 6.12                  508,231             $ 5.87
$11.26 - $14.25                1,946,013              9.10                $13.16                   76,768             $12.21
$14.26 - $18.50                  514,993              8.61                $16.23                  149,146             $15.89
$18.51 - $23.37                  205,062              7.02                $20.66                  140,044             $20.71
                               ---------              ----                ------                ---------             ------
                               3,367,869              8.12                $12.45                1,027,079             $ 9.33
                               =========              ====                ======                =========             ======
</TABLE>

         STOCK PURCHASE PLAN. In 1991, the Board of Directors adopted the 1991
Employee Stock Purchase Plan (the "Purchase Plan"). An aggregate of 350,000
shares of common stock have been reserved for issuance under the Purchase Plan.
Employees may designate up to 15% of their earnings, as defined, to purchase
shares at 85% of the lesser of the fair market value of the common stock at the
beginning of the offering period or on any purchase date during the offering
period, as defined. In 1994, 1995 and 1996, the Company issued 41,884, 35,886
and 49,944 shares, respectively, under this plan.

         STOCK-BASED COMPENSATION. In January 1996, the Company adopted FASB
Statement No. 123, "Accounting for Stock-Based Compensation" ("Statement 123").
Statement 123 defines a fair value method of accounting for stock-based
compensation plans. Under the fair value method, compensation cost is measured
at the grant date based on the value of the award and is recognized over the
service period. As permitted under Statement 123, the Company continues to apply
the provisions of Accounting Principals Board Opinion No. 25 and related
interpretations in accounting for its stock-based compensation plans and,
accordingly, does not recognize compensation cost. If the Company had elected to
recognize compensation cost based on the fair value of the stock options and
employee purchase rights under the Purchase Plan at the grant date as prescribed
by Statement 123, net income and earnings per share would have been as follows
(in thousands, except per share amounts):

<TABLE>
<CAPTION>
                                                              1995              1996
                                                              ----              ----
                  <S>                                         <C>               <C>    
                  Net loss - As reported                      $23,521           $39,345
                  Net loss - Pro forma                        $24,822           $44,178
                  Loss per share - As reported                $1.79             $2.93
                  Loss per share - Pro forma                  $1.89             $3.29
</TABLE>

         The weighted average fair value of stock options granted during 1995
and 1996 was $6.34 and $4.51 per share, respectively. The fair value for these
options was estimated at the date of grant using a Black-Scholes option pricing
model assuming a risk free interest rate of 6%, dividend yield of 0%, volatility
factor of the expected market price of the Company's Common Stock of 0.48 and a
weighted average expected option life of 0.68 years from the vest date.

         The weighted average fair value of employee stock purchase rights
granted during 1995 and 1996 was $1.69 and $1.44 per share, respectively. The
fair value for these purchase rights was estimated at the date of grant using a
Black-Scholes option pricing model assuming a risk free interest rate of 5%,
dividend yield of 0%, volatility factor of the expected market price of the
Company's Common Stock of 0.48 and a weighted average expected purchase right
life of six months.

                                      
<PAGE>   17
   
         COMMON STOCK RESERVED FOR FUTURE ISSUANCE. As of December 31, 1996 the
Company had reserved the following shares of common stock for future issuance:
    


<TABLE>
<CAPTION>
<S>                                                                                                          <C>      
Exercise of stock options..........................................................................          3,712,259
Conversion of 8% Convertible Subordinated Notes due 2003...........................................          3,092,783
Exercise of common stock warrants..................................................................            275,000
Employee stock purchase plan.......................................................................            193,045
                                                                                                            ----------
   TOTAL                                                                                                     7,273,087
                                                                                                            ==========
</TABLE>

VIII.    401(k) PLAN.

         In November 1987, the Company adopted a tax-qualified savings and
retirement plan (the "401(k) Plan"). Pursuant to the terms of the 401(k) Plan,
employees may elect to contribute up to 15% of their gross compensation. The
Company matches employee contributions at the rate of 50% for the first $2,000
contributed. Contributions by the Company to date have not been material.

IX.      INCOME TAXES.

         Deferred taxes are provided to reflect the net tax effects of temporary
differences between the financial reporting and income tax bases of assets and
liabilities using the currently enacted tax rate. The tax effect of temporary
differences and carryforwards, which give rise to a significant portion of
deferred tax assets, consisted of the following (in thousands):

<TABLE>
<CAPTION>
                                                                                               December 31,
                                                                                        1995                   1996
                                                                                        ----                   ----
<S>                                                                                 <C>                      <C>     
Reserves and other                                                                  $   2,423                $  2,902
Capitalized research and development                                                      999                   1,495
                                                                                    ---------                --------
  TOTAL                                                                                 3,422                   4,397
NOL and other credit carryforwards                                                     17,602                  31,993
Valuation allowance                                                                   (21,024)                (36,390)
                                                                                    --------                 -------
  TOTAL                                                                             $     --                 $    --
                                                                                    ========                 =======
</TABLE>

         As of December 31, 1995 and 1996, a valuation allowance was provided
for the net deferred tax assets as a result of uncertainties regarding their
realization. During 1996, the valuation allowance increased by approximately
$15.4 million due to increases in temporary differences and additional losses
incurred during the year. Approximately $1.8 million of the valuation allowance
will be credited directly to stockholders' equity and will not be available to
reduce the provision for income taxes in future years.

         As of December 31, 1996, the Company had net operating loss
carryforwards for Federal and California income tax purposes of approximately
$83.4 million and $28.3 million, respectively, and research and development tax
credit carryforwards of approximately $1.9 million. To the extent not used,
these carryforwards expire at various times through 2011. The Company's ability
to utilize the net operating loss carryforwards in any given year may be limited
upon the occurrence of certain events, including significant changes in
ownership interests.

                                      
<PAGE>   18
   
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
    

TO THE BOARD OF DIRECTORS AND STOCKHOLDERS OF METRICOM, INC.:

         We have audited the accompanying consolidated balance sheets of
Metricom, Inc. (a Delaware corporation) and subsidiaries as of December 31, 1995
and 1996 and the related consolidated statements of operations, stockholders'
equity and cash flows for each of the three years in the period ended December
31, 1996. These financial statements are the responsibility of the Company'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 financial position of Metricom, Inc. and
subsidiaries as of December 31, 1995 and 1996, and the results of their
operations and their cash flows for each of the three years in the period ended
December 31, 1996, in conformity with generally accepted accounting principles.



   
/s/ ARTHUR ANDERSEN LLP
    

   
San Jose, California
January 22, 1997
    
                                       


<PAGE>   1
                                                                    EXHIBIT 23.1

                                 METRICOM, INC.

                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

         As independent public accountants, we hereby consent to the
incorporation of our report included in this Form 10-K/A, into the Company's
previously filed Registration Statements on Form S-8, File Nos. 33-47688, 33-
63076, 33-63088, 33-91746, 33-95070, 333-09001, 333-09005 and 333-18319, and on
Form S-3, File Nos. 33- 78286 and 333-15169.



   
/s/ ARTHUR ANDERSEN LLP
San Jose, California
    

   
December 22, 1997
    

                                      


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