CMS ENERGY CORP
424B5, 2000-10-18
ELECTRIC & OTHER SERVICES COMBINED
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<PAGE>   1

                                                    Filed Pursuant to Rule 424b5
                                                      Registration No. 333-68937

             PROSPECTUS SUPPLEMENT TO PROSPECTUS DATED MAY 7, 1999

                               11,000,000 Shares

                               [CMS ENERGY LOGO]

                                  Common Stock

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

     Our common stock is listed on The New York Stock Exchange under the symbol
"CMS". The last reported sale price on October 16, 2000 was $28.94 per share.

     INVESTING IN OUR COMMON STOCK INVOLVES RISKS. SEE "RISK FACTORS" ON PAGE
S-12.

<TABLE>
<CAPTION>
                                                                UNDERWRITING
                                                  PRICE TO      DISCOUNTS AND      PROCEEDS
                                                   PUBLIC        COMMISSIONS        TO CMS
                                                  --------      -------------      --------
<S>                                             <C>             <C>              <C>
Per Share...................................       $28.25          $.48             $27.77
Total.......................................    $310,750,000     $5,280,000      $305,470,000
</TABLE>

     Delivery of the shares of common stock will be made on or about October 20,
2000.

     Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or determined if this
prospectus supplement or the accompanying prospectus is truthful or complete.
Any representation to the contrary is a criminal offense.

                           CREDIT SUISSE FIRST BOSTON

           The date of this prospectus supplement is October 16, 2000
<PAGE>   2

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                     PAGE
                                     ----
<S>                                  <C>
          PROSPECTUS SUPPLEMENT
FORWARD-LOOKING STATEMENTS.......     S-2
SUMMARY..........................     S-3
RISK FACTORS.....................    S-12
FORWARD-LOOKING INFORMATION......    S-17
USE OF PROCEEDS..................    S-19
SUPPLEMENTAL DESCRIPTION OF
  CAPITAL STOCK..................    S-19
TRANSFER AGENT...................    S-26
UNDERWRITING.....................    S-26
NOTICE TO CANADIAN RESIDENTS.....    S-27
LEGAL OPINIONS...................    S-28
EXPERTS..........................    S-29
UNAUDITED PRO FORMA FINANCIAL
  INFORMATION....................     F-1
</TABLE>

<TABLE>
<CAPTION>
                                     PAGE
                                     ----
<S>                                  <C>
               PROSPECTUS
AVAILABLE INFORMATION............       2
INCORPORATION OF CERTAIN
  DOCUMENTS BY REFERENCE.........       3
CMS ENERGY CORPORATION...........       4
CMS ENERGY TRUSTS................       6
USE OF PROCEEDS..................       8
RATIO OF EARNINGS TO FIXED
  CHARGES AND RATIO OF EARNINGS
  TO FIXED CHARGES AND PREFERRED
  STOCK DIVIDENDS................       8
DESCRIPTION OF SECURITIES........       9
EFFECT OF OBLIGATIONS UNDER THE
  DEBT SECURITIES AND THE
  GUARANTEES.....................      24
LEGAL OPINIONS...................      29
EXPERTS..........................      29
PLAN OF DISTRIBUTION.............      29
</TABLE>

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

     YOU SHOULD RELY ONLY ON THE INFORMATION CONTAINED IN THIS DOCUMENT OR TO
WHICH WE HAVE REFERRED YOU. WE HAVE NOT AUTHORIZED ANYONE TO PROVIDE YOU WITH
INFORMATION THAT IS DIFFERENT. THIS DOCUMENT MAY ONLY BE USED WHERE IT IS LEGAL
TO SELL THESE SECURITIES. THE INFORMATION IN THIS DOCUMENT MAY ONLY BE ACCURATE
ON THE DATE OF THIS DOCUMENT.

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

                           FORWARD-LOOKING STATEMENTS

     The prospectus supplement and the accompanying prospectus contain or
incorporate by reference forward-looking statements. The factors identified
under "Risk Factors" are important factors, but not necessarily all important
factors, that could cause actual results to differ materially from those
expressed in any forward-looking statement made by, or on behalf of, us or our
subsidiaries.

     Where any forward-looking statement includes a statement of the assumptions
or bases underlying such forward-looking statement, we caution that, while such
assumptions or bases are believed to be reasonable and are made in good faith,
assumed facts or bases almost always vary from actual results, and the
differences between assumed facts or bases and actual results can be material,
depending upon the circumstances. Where, in any forward-looking statement, we,
our subsidiaries, or our management, express an expectation or belief as to
future results, this expectation or belief is expressed in good faith and is
believed to have a reasonable basis, but there can be no assurance that the
statement of expectation or belief will result or be achieved or accomplished.
The words "believe," "expect," "estimate," "project," and "anticipate" or
similar expressions identify forward-looking statements.

                                       S-2
<PAGE>   3

                                    SUMMARY

     This summary may not contain all the information that may be important to
you. You should read this prospectus supplement, the accompanying prospectus and
the documents incorporated by reference in this document in their entirety
before making an investment decision. The terms "CMS," "CMS Energy," "Company,"
"Our" and "We" as used in this prospectus supplement and the accompanying
prospectus refer to CMS Energy Corporation and its subsidiaries.

     In this document, "Bcf" means billion cubic feet, "GWh" means
gigawatt-hour, "KWh" means kilowatt-hour, "MBbls" means thousand barrels, "Mcf'
means thousand cubic feet, "MMBoe" means million barrels of oil equivalent,
"MMBbls" means million barrels, "MMcf" means million cubic feet, "MW" means
megawatts, and "Tbtu" means trillion british thermal units.

                             CMS ENERGY CORPORATION

     CMS Energy is a leading diversified energy company operating in the United
States and around the world. Our two principal subsidiaries are Consumers Energy
Company ("Consumers") and CMS Enterprises Company ("Enterprises"). Consumers is
a public utility that provides natural gas or electricity to almost six million
of the approximately 9.5 million residents in Michigan's lower peninsula.
Enterprises, through subsidiaries, is engaged in a wide range of diversified
energy businesses in the United States and in approximately 20 countries on five
continents.

     Our assets and services are broad and include electric and natural gas
utility operations; independent power production; natural gas transmission,
storage and processing; oil and gas exploration and production; international
energy distribution; and marketing, services and trading. In 1999,

     - Consumers' electric utility owned and operated 31 electric generating
       plants with an aggregate of 6,252 MW of capacity and served 1.7 million
       customers in Michigan's lower peninsula;

     - Consumers' gas utility owned and operated over 25,000 miles of
       transmission and distribution lines throughout the lower peninsula of
       Michigan, providing natural gas to 1.6 million customers;

     - CMS Generation had ownership interests in approximately 41 independent
       power plants with 8,110 MW gross and 3,713 MW net capacity. The plants
       are located primarily in the U.S., Argentina, Australia, Chile, India,
       Morocco and Thailand;

     - CMS Gas Transmission owned and operated over 21,300 miles of pipelines
       with a daily capacity of approximately 10.0 Bcf per day. The pipelines
       are located in the U.S., Argentina, Australia, Chile and Tunisia. It also
       owns extensive gathering systems and processing facilities;

     - CMS Oil and Gas had proved reserves of 248 MMBoe and exploration and
       production activities in the U.S., Venezuela, Colombia, the Republic of
       Congo, Cameroon, Equatorial Guinea and Tunisia;
                                       S-3
<PAGE>   4

     - CMS Electric and Gas, our international energy distribution subsidiary,
       owned energy distribution interests in Venezuela, Argentina and Brazil,
       serving approximately 464,000 customers and recording sales of
       approximately 3,000 GWh;

     - CMS Marketing, Services and Trading marketed 470 Bcf of gas, 3,709 GWh of
       electricity, 23 MMBbls of crude oil and 6.5 MMBbls of natural gas
       liquids; and

     - Our various subsidiaries currently have ownership interests in projects
       under construction or in advanced stages of development, including
       approximately 2,700 MW of electric generation, 2.5 Bcf per day of
       pipeline throughput, 2 MMBbls of storage capacity, a 2,500 metric tons
       per day methanol production facility, and conversion of a natural gas
       pipeline to an 800 mile liquids product pipeline.

     In 1999, we had consolidated operating revenue of $6.1 billion and net
income of $277 million. For the six months ended June 30, 2000, we had
consolidated operating revenue of $3.4 billion and net income of $161 million.

     We were incorporated in Michigan in 1987 and our world wide web address is
http://www.cmsenergy.com. Our web site is not part of this prospectus
supplement. Our telephone number is (313) 436-9200.

                               BUSINESS STRATEGY

     Our objective is to be a leading diversified energy company developing
energy facilities and marketing energy and related services in the United States
and selected world growth markets. The key elements of our strategy to achieve
this objective are as follows:

  USE OUR NATURAL GAS PIPELINE BUSINESS FOR GROWTH OPPORTUNITIES ACROSS OUR
  OTHER
  BUSINESSES

     Our March 1999 acquisition of Panhandle Eastern Pipe Line Company,
Panhandle Storage Company, Trunkline LNG Company and their subsidiaries
(collectively, the "Panhandle Companies" or "Panhandle") significantly enhanced
our domestic natural gas pipeline business. We intend to use Panhandle as a
platform for growth in the United States and derive added value through
expansion opportunities for multiple CMS businesses. Our growth strategy around
Panhandle includes enhancing the opportunities for other CMS businesses involved
in electric power generation and distribution, mid-stream activities (gathering
and processing), and exploration and production. By providing additional
transportation, storage and other asset-based value-added services to customers
such as new gas fueled power plants, local distribution companies, industrials
and end-users, marketers and others, we expect to expand our natural gas
pipeline business. We also plan to convert certain Panhandle facilities to
permit the throughput of liquid products.

  EFFECTIVELY IMPLEMENT THE MICHIGAN ELECTRIC RESTRUCTURING LEGISLATION

     Our Consumers subsidiary is a leading generator and distributor of
electricity and distributor of natural gas in the lower peninsula of Michigan.
After several years of discussion and uncertainty in the Michigan electric
utility industry, in June 2000 the Michigan legislature enacted electric utility
restructuring legislation. The legislation requires an immediate 5% rate
reduction for residential customers that will reduce our annual revenues.
However, the legislation will allow Consumers to offset the earnings impact of
the 5% rate
                                       S-4
<PAGE>   5

reduction after an order approving securitization is received from the Michigan
Public Service Commission ("MPSC"). Ultimately, sale of securitization bonds
will be required for the full rate reduction offset to continue over the term of
the bonds. The new legislation also provides for rate freezes and rate caps as
more fully discussed below under "Risk Factors -- Risks Relating to CMS
Energy -- New electric restructuring and proposed gas restructuring legislation
could adversely affect our business." In response, Consumers must develop cost-
effective solutions to manage the challenges of the new legislation. For
example, we intend to further intensify our efforts to manage costs including
the management of fuel costs and purchased power costs in light of the rate
freezes and rate caps.

     Without regard to the electric utility restructuring legislation, Consumers
expects average annual growth of approximately 2.5% per year in electric system
deliveries for the years 2000 to 2005 based on a steadily growing customer base.
Also, Consumers currently anticipates gas deliveries, including gas customer
choice deliveries (excluding transportation to a natural gas-fueled,
combined-cycle cogeneration facility operated by the Midland Cogeneration
Venture, Partnership Limited (the "MCV Facility") and off-system deliveries), to
grow at an average annual rate of between 1% and 2% over the next five years
based primarily on a steadily growing customer base.

  EXPAND THE RANGE OF ENERGY-RELATED SERVICES

     In addition to the delivery of electricity and natural gas, we offer a
variety of energy-related services to electric and gas customers. These services
focus upon appliance maintenance, home safety, commodity choice and assistance
to customers purchasing heating, ventilation and air conditioning equipment. We
will continue to look for additional growth opportunities in energy-related
services for Consumers' customers.

  EXPAND PRESENCE IN SELECT HIGH GROWTH INTERNATIONAL MARKETS THROUGH OUR
  DIVERSIFIED ENERGY BUSINESSES

     We expect to continue to sharpen our geographic focus on key growth areas
where we already have significant business concentrations and opportunities.
These markets are India, the Middle East, South America and West Africa. In
pursuing our global growth, we intend to make energy investments that provide
expansion opportunities for multiple existing businesses. For example, we are
seeking to exploit our West Africa oil and gas reserves by expanding the
undersea pipeline and onshore processing facilities at that location. We will
use the gas from the processing plant in a new methanol plant and in a gas-fired
power plant in West Africa. Our gas pipelines in South America are being
extended to carry fuel for power plants in the area. In addition, we are a
partner in the first independent power and water project in the United Arab
Emirates and we are building our third power plant in India.

  OPTIMIZE OUR ASSETS THROUGH THE MARKETING, SERVICES AND TRADING BUSINESS

     We intend to use our marketing, services and trading business to improve
the return on our other businesses. This means that we plan to continue
centralizing the marketing of energy products produced by our various
non-utility businesses. Other strategies include expanding our industrial and
commercial energy services to enhance our commodity marketing business and
developing risk management products that address customer needs.
                                       S-5
<PAGE>   6

  CONTINUE MANAGEMENT OF OUR ASSET PORTFOLIO

     In February 2000, we announced a financial plan to strengthen our balance
sheet, reduce fixed charges and enhance earnings per share growth. As a part of
the plan, we identified for possible sale certain assets that we expect to
contribute little or no earnings benefit in the short to medium terms. With the
sale of certain of these assets, our goal is to generate approximately $1
billion of asset sale proceeds and $400 million of consolidated project debt
eliminations from asset sales by year-end 2000.

     We also intend to enhance our long-term growth through an active portfolio
management program that entails the ongoing sale of assets. We expect to
reinvest the proceeds from this program in assets having greater potential for
synergies with our existing or planned assets. In particular, we are reviewing
our options regarding certain assets performing below prior expectations,
including generating assets in Argentina. We also continue to seek improvement
in the operating efficiency and profitability of all assets retained in our
portfolio.

                              RECENT DEVELOPMENTS

CMS ENERGY

     In August 2000, 8.8 million units of 7 1/4% Premium Equity Participating
Security Units were sold by CMS Energy and CMS Energy Trust III, a Delaware
statutory business trust established by CMS Energy. Each security consists of a
trust preferred security of CMS Energy Trust III maturing in four years and a
contract requiring the purchase, no later than August 2003, of CMS Energy common
stock at a conversion rate that adjusts for the market price at the time of
conversion. Net proceeds from the sale totaled approximately $213 million and
were used, together with approximately $37 million from our revolving credit
facility, to redeem all of the outstanding Auction Rate Reset Subordinated
Notes, due September 2001 of CMS Energy.

     On October 2, 2000, among other things, we announced that we intend to sell
to the public up to a 50% stake in CMS Oil and Gas Company, our wholly-owned oil
and gas exploration and production subsidiary. We anticipate that this
transaction, combined with this common stock offering, will raise approximately
$800 million of cash which will be used to reduce our debt, and improve our
equity capitalization by approximately $450 million.

     On October 12, 2000, we sold $500 million aggregate principal amount of our
9 7/8% Senior Notes due 2007. Net proceeds from the sale totaled approximately
$489 million. We will use the proceeds to repay $300 million aggregate principal
amount of our 7 3/8% Unsecured Notes due November 15, 2000 at maturity and to
reduce the outstanding balance under our revolving credit facility. Pending
application of any proceeds to repay the Unsecured Notes, these funds were used
to reduce the outstanding balance under our revolving credit facility.

CONSUMERS

     Regulatory Matters. On July 5, 2000, Consumers filed an application with
the MPSC to begin the securitization process for approximately $470 million in
qualified costs, in compliance with the Customer Choice and Electric Reliability
Act ("Customer Choice Act") and
                                       S-6
<PAGE>   7

related securitization laws. Securitization typically involves the issuance of
bonds with a high credit rating. The MPSC approval of the application will not
increase current electric rates for any of Consumers' customers, but will allow
Consumers to offset the earnings impact of the 5% rate reduction that was
implemented for the utility's 1.5 million residential electric customers in June
2000 as required by the Customer Choice Act. Ultimately, sale of the
securitization bonds will be required for the full rate reduction offset to
continue over the expected term of the bonds. The application requests that the
MPSC find that Consumers' Palisades nuclear plant capital costs (net of
depreciation) and other regulatory assets be identified as "qualified costs" and
therefore eligible for securitization. Absent appeals, Consumers anticipates
that securitization bonds will be issued at the earliest by the end of 2000.

     In March 1999, Consumers signed a long-term power sales agreement to resell
to PECO Energy Company, a non-affiliated company, its capacity and energy
purchases under the Power Purchase Agreement between Consumers and the Midland
Cogeneration Venture Partnership until September 2007. Implementation of the
agreement was contingent upon regulatory treatment satisfactory to Consumers.
Since March 1999, Consumers has engaged in proceedings before the MPSC to secure
satisfactory accounting and ratemaking approvals related to the PECO agreement.
The last in a series of MPSC orders was issued in August 2000 refusing to grant
Consumers' request. Consumers recently gave notice to PECO of its intention to
terminate this long-term agreement at the end of 2000 as contemplated under the
terms of the agreement. Due to uncertainties associated with electric industry
restructuring legislation in Michigan, Consumers and PECO had entered into an
interim arrangement for the sale of 125 MW of Power Purchase Agreement capacity
and associated energy to PECO during 2000. The completion of the interim
arrangement will not effect the termination of the long-term agreement.

     On October 13, 2000, the MPSC issued an order that primarily adopted terms
and conditions for providing permanent gas customer choice programs for
residential and commercial customers in Michigan. This order facilitates the
expansion of Consumers' gas customer choice pilot program scheduled to end on
March 31, 2001. At that time, Consumers will no longer be subject to a frozen
gas distribution rate and will return to a gas cost recovery mechanism.
                                       S-7
<PAGE>   8

                                  THE OFFERING

Shares offered........................    11,000,000 Shares of CMS Energy
                                          common stock, ($.01 par value)

CMS Energy common stock outstanding as
of October 16, 2000 (before giving
effect to this offering)..............    109,870,339 Shares

Use of proceeds.......................    We intend to use the net proceeds
                                          primarily to repay borrowings under
                                          our Revolving Credit Facility. The
                                          remaining amounts will be used to
                                          repay various lines of credit.

CMS Energy common stock prices:

  Reported Ranges -- 2000.............    High         Low

     (First Quarter)..................    $32.06   --  $16.06

     (Second Quarter).................    $23.69   --  $17.75

     (Third Quarter)..................    $29.69   --  $22.06

     (Fourth Quarter to October 16,
     2000)............................    $29.25   --  $26.69

Current indicated annual dividend rate
per share.............................    $1.46

NYSE symbol...........................    CMS
                                       S-8
<PAGE>   9

            SELECTED HISTORICAL AND PRO FORMA FINANCIAL INFORMATION

     The following selected historical and pro forma financial information has
been derived from our historical consolidated financial statements. We have
prepared pro forma financial information to reflect our acquisition of the
common stock of the Panhandle Companies. Please refer to our Form 10-K for the
fiscal year ended December 31, 1999 which is incorporated by reference. The
financial information set forth below should be read in conjunction with our
consolidated financial statements, related notes and other financial information
incorporated by reference in the accompanying prospectus. See "Incorporation of
Certain Documents by Reference" in the accompanying prospectus.

<TABLE>
<CAPTION>
                                                                                          SIX MONTHS ENDED
                                       YEAR ENDED DECEMBER 31,                                JUNE 30,
                           -----------------------------------------------         ------------------------------
                                                                   PRO                           PRO
                                                                  FORMA                         FORMA
                            1997      1998      1999             1999(1)            1999       1999(1)      2000
                           -------   -------   -------         -----------         -------   -----------   ------
                                                               (UNAUDITED)                   (UNAUDITED)
                                                    (IN MILLIONS, EXCEPT PER SHARE DATA)
<S>                        <C>       <C>       <C>             <C>                 <C>       <C>           <C>
INCOME STATEMENT DATA:
Operating revenue........  $ 4,781   $ 5,141   $ 6,103           $ 6,216           $ 2,869     $ 2,982     $3,426
Operating expenses.......    4,065     4,366     5,191             5,244             2,393       2,446      2,928
                           -------   -------   -------           -------           -------     -------     ------
  Pretax operating
    income...............      716       775       912               972               476         536        498
Income taxes.............      108       100        64                72                67          74         68
Consolidated net income
  before cumulative
  effect of change in
  accounting principle...      244       242       277               287               173         184        161
Cumulative effect of
  change in accounting
  for property taxes, net
  of tax(2)..............       --        43        --                --                --          --         --
                           -------   -------   -------           -------           -------     -------     ------
Consolidated net
  income.................  $   244   $   285   $   277           $   287           $   173     $   184     $  161
                           =======   =======   =======           =======           =======     =======     ======
Net income attributable
  to common stocks(2)
  CMS Energy.............  $   229   $   272   $   241(8)        $   251(8)        $   162     $   173     $  161
  Class G................       15        13        36(8)(9)          36(8)(9)          11          11         --
Average common shares
  outstanding
  CMS Energy.............       96       102       110               110               108         108        112
  Class G................        8         8         9(9)              9(9)              9           9         --
Earnings per average
  common share(2)
  CMS Energy
    Basic................  $  2.39   $  2.65   $  2.18(8)        $  2.27(8)        $  1.50     $  1.59     $ 1.44
    Diluted..............     2.37      2.62      2.17(8)           2.26(8)           1.48        1.57       1.42
Class G Basic and
  Diluted................     1.84      1.56      4.21(8)(9)        4.21(8)(9)        1.28        1.28         --
Dividends declared per
  common share
  CMS Energy.............     1.14      1.26      1.39              1.39               .66         .66        .73
  Class G................     1.21      1.27       .99(9)            .99(9)            .65         .65         --
</TABLE>

                                       S-9
<PAGE>   10

<TABLE>
<CAPTION>
                                                       AS OF DECEMBER 31,            AS OF          AS OF
                                                  ----------------------------     JUNE 30,       JUNE 30,
                                                   1997      1998       1999         1999           2000
                                                  ------    -------    -------    -----------    -----------
                                                         (IN MILLIONS)            (UNAUDITED)    (UNAUDITED)
<S>                                               <C>       <C>        <C>        <C>            <C>
BALANCE SHEET DATA:
Cash and cash equivalents.....................    $   69    $   101    $   132      $   213        $   240
Net plant and property........................     5,144      6,040      8,121        7,252          8,099
Total assets..................................     9,508     11,310     15,462       14,139         15,707
Long-term debt, excluding current
  maturities..................................     3,272      4,726      6,987        7,079          6,918
Non-current portion of capital leases.........        75        105         88           92            197
Notes payable.................................       382        328        230          264            278
Other liabilities.............................     3,361      3,304      4,538        3,479          4,594
Company-obligated mandatorily redeemable trust
  preferred securities of:
  Consumers Power Company Financing I(3)......       100        100        100          100            100
  Consumers Energy Company Financing II(3)....       120        120        120          120            120
  Consumers Energy Company Financing III(4)...        --         --        175           --            175
  CMS RHINOS Trust(7).........................        --         --        250          250            250
Company-obligated convertible trust preferred
  securities of:
  CMS Energy Trust I(5).......................       173        173        173          173            173
  CMS Energy Trust II(6)......................        --         --        301           --            301
Preferred stock of subsidiary.................       238        238         44           44             44
Common stockholders' equity...................     1,787      2,216      2,456        2,390          2,345
</TABLE>

-------------------------
 (1) The pro forma selected financial information illustrates the effects of (i)
     various restructuring, realignment, and elimination of activities between
     the Panhandle Companies and Duke Energy Corporation prior to the closing of
     the acquisition of the Panhandle Companies by CMS Energy, (ii) the
     adjustments resulting from the acquisition of the Panhandle Companies and
     (iii) financing transactions which include the public issuance of $800
     million of senior notes by Panhandle, $850 million of senior notes by CMS
     Energy and the private sale of $250 million of trust preferred securities
     by CMS Energy.

 (2) During the first quarter of 1998, our subsidiary, Consumers, implemented a
     change in the method of accounting for property taxes which had the
     cumulative effect of increasing other income by $66 million, including $18
     million attributable to the portion of our business relating to Class G
     common stock. Earnings, net of tax, increased by $43 million or $0.40 per
     share for CMS Energy common stock and $12 million or $0.36 per share for
     Class G common stock.

 (3) The primary asset of Consumers Power Company Financing I is approximately
     $103 million principal amount of 8.36% subordinated deferrable interest
     notes due 2015 from Consumers. The primary asset of Consumers Energy
     Company Financing II is $124 million principal amount of 8.20% subordinated
     deferrable interest notes due 2027 from Consumers.

 (4) The primary asset of Consumers Energy Company Financing III is $180 million
     principal amount of 9.25% subordinated deferrable interest notes due 2029
     from Consumers.

 (5) The primary asset of CMS Energy Trust I is approximately $178 million
     principal amount of 7.75% convertible subordinated debentures due 2027 from
     us.
                                      S-10
<PAGE>   11

 (6) The primary asset of CMS Energy Trust II is approximately $310 million
     principal amount of 8.625% convertible junior subordinated deferrable
     interest debentures due 2004 from us.

 (7) The primary asset of CMS RHINOS Trust was approximately $258 million
     principal amount of floating rate, subordinated interest notes due 2001
     from us. These securities were redeemed on August 22, 2000 using the
     proceeds of the Premium Equity Participating Security Units issued on
     August 22, 2000 and additional borrowings under the Revolving Credit
     Facility.

 (8) Reflects the reallocation of net income and earnings per share as a result
     of the premium on exchange of Class G common stock. As a result, CMS
     Energy's basic and diluted earnings per share were reduced $0.26 and $0.25,
     respectively, and Class G's basic and diluted earnings per share were
     increased $3.31.

 (9) From January 1, 1999 to October 25, 1999.
                                      S-11
<PAGE>   12

                                  RISK FACTORS

     In considering whether to purchase our Common Stock, you should carefully
consider all the information we have included or incorporated by reference in
this prospectus supplement and the accompanying prospectus. In particular, you
should carefully consider the risk factors described below. In addition, please
read "Forward-Looking Information" on page S-17 of this prospectus supplement,
where we describe additional uncertainties associated with our business and the
forward-looking statements in this prospectus supplement and the accompanying
prospectus.

RISKS RELATING TO CMS ENERGY

  WE HAVE SUBSTANTIAL INDEBTEDNESS THAT COULD LIMIT OUR FINANCIAL FLEXIBILITY

     On a consolidated basis, we and our subsidiaries had approximately $8.3
billion in total indebtedness and mandatorily redeemable trust preferred
securities as of June 30, 2000. We may incur additional indebtedness in the
future. The level of our indebtedness could have several important effects on
our future operations, including, among others:

     - a significant portion of our cash flow from operations will be dedicated
       to the payment of principal and interest on our indebtedness and will not
       be available for other purposes;

     - covenants contained in our existing debt arrangements require us to meet
       certain financial tests, which may affect our flexibility in planning
       for, and reacting to, changes in our business;

     - our ability to obtain additional financing for working capital, capital
       expenditures, acquisitions, general corporate and other purposes may be
       limited;

     - we may be at a competitive disadvantage to our competitors that are less
       leveraged; and

     - our vulnerability to adverse economic and industry conditions may
       increase.

     Our ability to meet our debt service obligations and to reduce our total
indebtedness will be dependent upon our future performance, which will be
subject to general economic conditions, industry cycles and financial, business
and other factors affecting our operations, many of which are beyond our
control. We cannot assure you that our business will continue to generate
sufficient cash flow from operations to service our indebtedness. If we are
unable to generate sufficient cash flow from operations, we may be required to
sell assets, to refinance all or a portion of our indebtedness or to obtain
additional financings. We cannot assure you that any such refinancing will be
possible or that additional financing will be available on commercially
acceptable terms or at all.

     Covenants contained in our existing debt arrangements and guarantees limit,
among other things, the incurrence of indebtedness by CMS Energy and its
subsidiaries and require maintenance of a minimum net worth and fixed-charge
coverage ratio and a maximum debt-to-capitalization ratio. There can be no
assurance that the requirements of our existing debt arrangements or other
indebtedness will be met in the future. Failure to comply with such covenants
may result in a default with respect to the related debt and could lead to
acceleration of such debt or any instruments evidencing indebtedness that
contain

                                      S-12
<PAGE>   13

cross-acceleration or cross-default provisions. In such a case, there can be no
assurance that we would be able to refinance or otherwise repay such
indebtedness.

  AS A HOLDING COMPANY, WE ARE SUBJECT TO RESTRICTIONS ON OUR ABILITY TO PAY
  DIVIDENDS

     We are a legal entity separate and distinct from our various subsidiaries.
As a holding company with no significant operations of our own, the principal
sources of our funds are dividends or other distributions from our operating
subsidiaries (in particular, Consumers), borrowings and sales of equity. The
ability of Consumers and our other subsidiaries to pay dividends or make
distributions to us, and, accordingly, our ability to pay dividends on our
capital stock will depend on the earnings, financial requirements, contractual
restrictions of our subsidiaries, in particular Consumers, and other factors.
Our subsidiaries are separate and distinct legal entities and have no
obligation, contingent or otherwise, to pay any amounts on our capital or to
make any funds available therefor, whether by dividends, loans or other
payments.

     Restrictions contained in Consumers' mortgage bond indenture and preferred
stock provisions and other legal restrictions limit Consumers' ability to pay
dividends or acquire its own stock from us. Based upon its Articles of
Incorporation, the most restrictive provision, as of June 30, 2000, Consumers
would be able to pay an aggregate of $360 million in dividends to us. In the
four years ending December 31, 1999, Consumers paid out $921 million or 71% of
its earnings in cash dividends to us. Enterprises is also limited in the amount
of dividends it is able to pay since it is expanding its developing businesses.

     If we do not receive adequate distributions from our subsidiaries and
jointly owned enterprises, there can be no assurance that we will be able to
make any dividend payments on our capital stock.

  WE FACE INCREASED COMPETITION, WHICH COULD REDUCE OUR MARKET SHARES AND PROFIT
  MARGINS

     Regulatory changes and other developments have resulted and will continue
to result in increased competition in our domestic energy businesses. Generally,
increased competition threatens our market shares in certain segments of our
business and can reduce our profit margins.

     Increased competition and direct access in the gas industry. Regulatory
changes have been significant in our gas utility business. These changes have
resulted in increased competition from other sellers of natural gas for sale of
the gas commodity to our customers. As a result of the regulatory changes that
separated (unbundled) the transportation and storage of natural gas from the
sale of natural gas by interstate pipelines and Michigan gas distributors,
Consumers offers unbundled services (transportation and some storage) to its
larger end-use customers who choose to acquire gas supplies from alternative
sources. Additionally, to prepare for the unbundled market, Consumers is
conducting an expanded gas customer choice pilot program which, through March
2001, will allow 300,000 residential, commercial and industrial retail gas sales
customers to choose an alternative gas supplier in direct competition with
Consumers as a supplier of the gas commodity. On October 13, 2000 the MPSC
adopted the terms and conditions for providing permanent gas customer choice for
Michigan customers. At this time, we do not know the full impact of competition.

                                      S-13
<PAGE>   14

     Increased competition and direct access in the electric industry. Consumers
has in the last several years experienced and expects to continue to experience
a significant increase in competition for generation services with the
introduction of retail direct access in the state of Michigan. Under the new
electric restructuring legislation enacted in June 2000, all electric customers
will have the choice of electric generation suppliers by January 1, 2002.

     Increased competition in the gas pipeline industry. Since we have completed
the acquisition of the Panhandle companies, a significant portion of our
domestic revenue and cash flow comes from our interstate pipeline business. The
Federal Energy Regulatory Commission ("FERC") policy allows the issuance of
certificates authorizing the construction of new interstate pipelines which are
competitive with existing pipelines. A number of new pipeline and pipeline
expansion projects have been approved or are pending approval by the FERC in
order to transport large additional volumes of natural gas to the midwestern
United States from Canada. These pipelines will be able to compete with
Panhandle's pipelines. Increased competition could reduce the volumes of gas
transported by Panhandle to their existing markets or cause them to lower rates
in order to meet competition. This could lower the financial benefits we receive
from the acquisition of the Panhandle companies.

  INCREASES IN GAS PRICES COULD RESULT IN SIGNIFICANT LOSSES

     In December 1997, the MPSC approved Consumers' application to implement,
effective April 1, 1998, a gas customer choice pilot program that was designed
to encourage Consumers to minimize its purchased natural gas commodity costs
while providing rate stability for its customers. The pilot program ends on
March 31, 2001. This three-year program, among other things, freezes gas
distribution rates through March 31, 2001, establishing a delivered gas
commodity cost at a fixed rate of $2.84 per Mcf. During the first two years of
the pilot program, Consumers realized a benefit of $45 million as delivered gas
commodity prices were below the $2.84 per Mcf level collected from customers.
Recent significant increases in gas prices have exposed Consumers to gas
commodity losses during the last year of the program that ends March 31, 2001.
Estimated loss of earnings for this last year of the program could range from
$45 million to $135 million, of which Consumers has already recognized $45
million in the second quarter 2000 as a regulatory obligation. Under the
provisions of the pilot program, Consumers has the right to request termination
of the program at any time and to return to a gas cost recovery mechanism,
pursuant to which the customer gas commodity prices would increase significantly
from the current frozen rate. As an alternative to exercising that right,
Consumers is considering an approach that, if approved by the MPSC, would
potentially avoid further losses any greater than the $45 million already
recognized and mitigate the customer rate increases that would otherwise result.
It is expected that such an approach could be implemented this fall, but there
is no assurance that the MPSC would approve Consumers' approach.

  NEW ELECTRIC RESTRUCTURING AND PROPOSED GAS RESTRUCTURING LEGISLATION COULD
  ADVERSELY AFFECT OUR BUSINESS

     Federal and state regulation of electric and natural gas utilities,
interstate pipelines and independent electric power producers has changed
dramatically in the last two decades and could continue to change over the next
several years. These changes could adversely affect our business, financial
condition and profitability.

     New electric restructuring legislation. In June 2000, the Michigan
Legislature enacted electric industry restructuring and securitization laws that
became effective June 5, 2000. The

                                      S-14
<PAGE>   15

new legislation first reduces residential rates by 5% then freezes them as of
the effective date of the new legislation through December 31, 2003. All other
electric rates are frozen through December 31, 2003 without first being reduced.
After that date, electric rates are subject to a rate cap. The length of the
rate cap varies depending upon whether the customer is a residential, commercial
or industrial customer, among other determinations. Ultimately, the rate cap
could extend until December 31, 2013 depending upon whether Consumers and two
other utilities jointly complete expansion of available transmission capability
in the state of Michigan of at least 2,000 MW and do not exceed the market
control test established by the legislation (a requirement Consumers is
currently in compliance with). Under circumstances specified in the statute,
certain costs can be deferred for future recovery after the expiration of the
rate cap period. However, the rate cap could result in Consumers being unable to
collect customer rates sufficient to recover fully its cost of doing business.
It is not certain that Consumers' profit margins in its electric utility
business will be maintained over the long run.

     This new legislation and existing MPSC restructuring orders provide for
recovery of the stranded costs associated with customers purchasing power from
other sources. The new legislation also permits the MPSC annually to review
Consumers' stranded cost recovery charges implemented for the preceding 12
months, and adjust the stranded costs recovery charge (a true-up adjustment), by
way of supplemental surcharges or credits, to allow the netting of stranded
costs. Consumers is uncertain how the MPSC will ultimately calculate the amount
of stranded costs and the true-up adjustments, and the manner in which the
annual stranded cost true-up operates.

     The new legislation also allows for securitization of stranded costs, which
fit the definition under the legislation of qualified costs for securitization
purposes, in order to offset the earnings impact of the 5% residential rate
reduction mandated by the legislation. Ultimately, sale of securitization bonds
will be required for the full rate reduction offset to continue over the term of
the bonds. In accordance with the securitization law, Consumers filed an
application, and a supplement thereto, in July 2000, to begin the securitization
process for approximately $470 million in qualified costs. The MPSC is required
to issue a financing order within 90 days of the supplemental application
filing. As with other significant MPSC orders, a securitization order is subject
to appeal by any party during which time the suspension of amortization of the
approved regulatory asset would cease, thereby offsetting the loss in revenue
discussed above.

     Proposed gas restructuring legislation. In December 1999, several bills
relating to gas industry restructuring were introduced in the Michigan
legislature. It is uncertain whether this legislation will be enacted and what
effect any legislation would have on Consumers.

  WE MAY NOT BE ABLE TO SELL ASSETS AS PLANNED TO IMPROVE OUR BALANCE SHEET

     As of September 2000, we sold assets resulting in approximately $850
million of cash proceeds and associated debt reduction of consolidated project
debt under our financial plan announced in February 2000. There are no
assurances that we can sell an additional $550 million of assets by the end of
the year 2000 as planned. Failure to sell assets as planned would undermine our
financial plan, which could in turn make it more difficult for us to raise
additional funds and effect our growth strategy.

  WE HAVE MADE SUBSTANTIAL INTERNATIONAL INVESTMENTS

     Our international investments in approximately 20 countries in electric
generating facilities, oil and gas exploration, production and processing
facilities, natural gas pipelines

                                      S-15
<PAGE>   16

and electric distribution systems face a number of risks inherent in acquiring,
developing and owning these types of facilities. Although we maintain insurance
for various risk exposures including political risk from possible
nationalization, expropriation or inability to convert currency, we are exposed
to some risks that include local political and economic factors over which we
have no control, such as changes in foreign governmental and regulatory policies
(including changes in industrial regulation and control and changes in
taxation), changing political conditions and international monetary
fluctuations. In some cases the investment may have to be abandoned or disposed
of at a loss. These factors could significantly adversely affect the financial
results of the affected subsidiary and, in turn, our growth plans for
Enterprises' international investments and our financial position and results of
operations.

     Financial risk during development phase. In developing new projects,
significant time and expense is required to prepare proposals or competitive
bids, obtain the numerous required permits, licenses and approvals, negotiate
the necessary agreements with governmental and private parties, and obtain
financing. Money spent for these purposes is at risk until all these elements
are successfully finalized. It is often impractical to finalize all elements
before significant sums have been spent. As a result, there is a risk that these
up-front expenditures will be of little value if one of the required approvals
or other elements is not finally achieved and the project does not go forward or
is not completed.

     Expropriation and violation of agreements by third parties. International
investments of the type we are making are subject to the risk that they may be
expropriated or that the required agreements, licenses, permits and other
approvals may be changed or terminated in violation of their terms. These kinds
of changes could result in a partial or total loss of our investment.

     Foreign currency risk. The local foreign currency may be devalued or the
conversion of the currency may be restricted or prohibited or other actions,
such as increases in taxes, royalties or import duties, may be taken which
adversely affect the value and the recovery of our investment.

  WE COULD INCUR SIGNIFICANT CAPITAL EXPENDITURES TO COMPLY WITH ENVIRONMENTAL
  STANDARDS

     We and our subsidiaries are subject to costly and increasingly stringent
environmental regulations. We expect that the cost of future environmental
compliance, especially compliance with clean air laws, will be significant.

     The Environmental Protection Agency in 1997 introduced new regulations
regarding nitrogen oxide and particulate-related emissions which are the subject
of litigation. The nitrogen oxide litigation has been appealed to the U.S.
Supreme Court. These regulations, if upheld, will require us to make significant
capital expenditures. The state of Michigan has introduced alternative less
stringent clean air regulations. The preliminary estimates of capital
expenditures to reduce nitrogen oxide-related emissions to the level proposed by
the state of Michigan for Consumers' fossil-fueled generating units range from
$150 million to $290 million, calculated in year 2000 dollars. If Consumers had
to meet the EPA's proposed requirements, the estimated cost to Consumers would
be between $290 million and $500 million, calculated in year 2000 dollars.
Consumers anticipates that it will incur these capital expenditures between 2000
and 2004, or between 2000 and 2003 if the EPA ultimately imposes its limits. In
addition, Consumers expects to incur cost of removal related to this effort, but
is unable to predict the amount at this time.

                                      S-16
<PAGE>   17

     Consumers may need an equivalent amount of capital expenditures to comply
with the new small particulate standards sometime after 2004 if those standards
become effective.

     These and other required environmental expenditures may have a material
adverse effect upon our financial condition and results of operations.

                          FORWARD-LOOKING INFORMATION

     From time to time, we may make statements regarding our assumptions,
projections, expectations, intentions or beliefs about future events. These
statements are intended as "Forward-Looking Statements" under the Private
Securities Litigation Reform Act of 1995. We caution that these statements may
and often do vary from actual results and the differences between these
statements and actual results can be material. Accordingly, we cannot assure you
that actual results will not differ materially from those expressed or implied
by the forward-looking statements. Some of the factors that could cause actual
achievements and events to differ materially from those expressed or implied in
any forward-looking statements are:

     - the ability to sell assets in accordance with our plans;

     - the ability to achieve operating synergies and revenue enhancements;

     - capital and financial market conditions, including the current price of
       our common stock, interest rates and availability of financing;

     - market perceptions of the energy industry, our company or any of our
       subsidiaries;

     - our or any of our subsidiaries' securities ratings;

     - currency exchange controls;

     - factors affecting utility and diversified energy operations such as
       unusual weather conditions, catastrophic weather-related damage,
       unscheduled generation outages, maintenance or repairs, unanticipated
       changes to fossil fuel, nuclear fuel or gas supply costs or availability
       due to higher demand, shortages, transportation problems or other
       developments;

     - environmental incidents;

     - electric transmission or gas pipeline system constraints;

     - international, national, regional and local economic, competitive and
       regulatory conditions and developments;

     - adverse regulatory or legal decisions, including environmental laws and
       regulations;

     - pace of implementation and provisions for deregulation of the natural gas
       industry, whether by legislative or regulatory action;

     - implementation of the Michigan electric industry restructuring
       legislation;

     - federal regulation of electric sales and transmission of electricity that
       grants independent power producers, electricity marketers and other
       utilities "direct access" to the interstate electric transmission systems
       owned by electric utilities, creating opportunities for competitors to
       market electricity to our wholesale customers;

                                      S-17
<PAGE>   18

     - energy markets, including the timing and extent of unanticipated changes
       in commodity prices for oil, coal, natural gas, natural gas liquids,
       electricity and certain related products due to higher demand, shortages,
       transportation problems or other developments;

     - the timing and success of business development efforts;

     - potential disruption, expropriation or interruption of facilities or
       operations due to accidents or political events and the ability to get or
       maintain insurance coverage for such events;

     - nuclear power performance, decommissioning, policies, procedures,
       incidents and regulation, including spent nuclear fuel storage
       availability;

     - technological developments in energy production, delivery and usage;

     - financial or regulatory accounting principles or policies;

     - cost and other effects of legal and administrative proceedings,
       settlements, investigations and claims;

     - limitations on our ability to control the development or operation of
       projects in which our subsidiaries have minority interests; and

     - other uncertainties, all of which are difficult to predict and many of
       which are beyond our control.

     These and other factors are discussed more completely in our public filings
with the SEC, including our annual report on Form 10-K for the year ended
December 31, 1999.

                                      S-18
<PAGE>   19

                                USE OF PROCEEDS

     We intend to use the net proceeds of this offering primarily to repay
borrowings under our $1 billion revolving credit facility with The Chase
Manhattan Bank, as lead agent (the "Revolving Credit Facility"). This Revolving
Credit Facility has a weighted average interest rate of 8.73% as of September
30, 2000. The remaining amounts will be used to repay various lines of credit
with an average interest rate of 8.74% as of September 30, 2000.

                   SUPPLEMENTAL DESCRIPTION OF CAPITAL STOCK

     The following information concerning the shares supplements, and should be
read in conjunction with, the statements under "Description of Securities --
Capital Stock" in the accompanying base prospectus.

GENERAL

     Our Restated Articles of Incorporation authorize us to issue 10 million
shares of preferred stock, par value $0.01 per share, 250 million shares of CMS
Energy common stock, par value $0.01 per share, and 60 million shares of Class G
common stock, no par value. Only the preferred stock is currently issuable in
series by the board of directors. As of October 16, 2000, we had 125,000 shares
of Series A Mandatorily Convertible Preferred Stock, 109,870,339 shares of CMS
Energy common stock (before giving effect to this offering), par value $0.01 per
share, and no shares of Class G common stock, no par value, issued and
outstanding.

PREFERRED STOCK

     The Restated Articles of Incorporation, as amended, provide that the board
of directors may issue shares of preferred stock in one or more series from time
to time. The board of directors has the authority to fix by resolution or
resolutions the designation, powers, preferences and rights, and the
qualifications, limitations and restrictions of the shares of each series of
preferred stock, including without limitation, the following:

     - the dividend rate, if any, payable to holders of the shares of such
       series;

     - the price at and the terms and conditions upon which the shares of such
       series may be redeemed;

     - the rights, if any, of the holders of the shares of such series upon
       voluntary or involuntary liquidation, merger, consolidation, distribution
       or sale of assets, dissolution or winding-up of CMS Energy;

     - sinking fund or redemption or purchase provisions, if any, to be provided
       for shares of such series;

     - the terms and conditions upon which shares of such series may be
       converted into shares of other series or other capital stock, if issued
       with conversion privileges; and

     - the voting rights in the event of default of payment of dividends or
       under such other circumstances and upon such conditions as the board of
       directors may determine.

  SERIES A MANDATORILY CONVERTIBLE PREFERRED STOCK

     General. Our Restated Articles of Incorporation establish one series of
preferred stock designated as "Series A Mandatorily Convertible Preferred Stock"
consisting of 125,000 shares with a liquidation preference of $1,000 per share.
The Series A Preferred Stock ranks prior to any series of our common stock as to
the payment of dividends and

                                      S-19
<PAGE>   20

distribution of assets upon dissolution, liquidation or winding up of CMS
Energy, and is convertible into shares of CMS Energy common stock. The holders
of the Series A Preferred Stock have no preemptive rights.

     Dividends. Holders of Series A Preferred Stock are not entitled to receive
dividends prior to the rate reset date. After such date, dividends on the Series
A Preferred Stock are payable quarterly in cash at the reset dividend rate. The
reset dividend rate per annum for each dividend period beginning on the rate
reset date will generally be equal to $1,000 times the sum of (1) 7.0% plus (2)
the annual dividend yield of a share of our common stock.

     Dividends on the Series A Preferred Stock are cumulative and rights accrue
to the holders of Series A Preferred Stock if we fail to declare one or more
dividends on the Series A Preferred Stock in any amount, whether or not our
earnings or financial condition are sufficient to pay such dividends in whole or
in part.

     As long as any Series A Preferred Stock is outstanding, we may not pay
dividends or distributions on, or purchase, redeem or otherwise acquire, subject
to certain exceptions, shares of our common stock unless (1) full dividends on
the Series A Preferred Stock have been paid or set aside for payment, (2) all
required amounts for purchase or retirement of, or sinking funds for,
outstanding shares of Series A Preferred Stock have been paid or set aside and
(3) we are not in default of any obligations to redeem the Series A Preferred
Stock.

     Voting Rights. The holders of the Series A Preferred Stock are not entitled
to vote, except as set forth below or as expressly required by applicable law.

     So long as any shares of Series A Preferred Stock are outstanding, the
affirmative vote or consent of the holders of at least a majority of the
outstanding shares of Series A Preferred Stock will be required for any
amendment of our Restated Articles of Incorporation which will adversely affect
the powers, preferences, privileges or rights of the Series A Preferred Stock.
In addition, the affirmative vote or consent of the holders of at least a
majority of the outstanding shares of Series A Preferred Stock will be required
to authorize, issue or increase the authorized amount of any stock of any class
or series or any security convertible into stock of any class or series ranking
prior to the Series A Preferred Stock, or to authorize our merger or
consolidation with or into another corporation or a statutory share exchange
with another corporation, subject to certain exceptions.

     Redemption. At any time following a redemption event and prior to a rate
reset date, we will have the right to redeem all outstanding shares of Series A
Preferred Stock at a price of $1,000 per share, plus accrued and unpaid
dividends. A redemption event means the occurrence of any of the following:

     - our consolidation or merger with or into another entity, or a statutory
       exchange of securities with another entity, unless in connection with
       such transaction, our outstanding shares of common stock immediately
       preceding the transaction are converted into, exchanged for or otherwise
       represent at least a majority of the outstanding common stock of the
       surviving or resulting entity; or

     - the sale or conveyance of all or substantially all of our assets to
       another entity, other than our subsidiary.

     Mandatory Conversion. Unless previously converted at the option of the
holder as described in the next paragraph, on the third anniversary of the rate
reset date, each outstanding share of Series A Preferred Stock will
automatically convert into a number of shares of our common stock at the "CMS
mandatory conversion rate," plus accrued and

                                      S-20
<PAGE>   21

unpaid dividends. The CMS mandatory conversion rate equals the following number
of shares of our common stock per share of Series A Preferred Stock, subject to
adjustment:

     - if the average trading price of a share of our common stock for the
       20-trading day period immediately prior to the conversion date equals or
       exceeds the product of the reset price and 1.10 (the "CMS threshold
       appreciation price"), the quotient of $1,000 divided by the CMS threshold
       appreciation price;

     - if the average trading price of a share of our common stock for the
       20-trading day period immediately prior to the conversion date is less
       than the CMS threshold appreciation price but is greater than the reset
       price, the quotient of $1,000 divided by the average trading price of a
       share of our common stock for the 20-trading day period immediately prior
       to the conversion date; and

     - if the average trading price of a share of our common stock for the
       20-trading day period immediately prior to the conversion date is less
       than or equal to the reset price, the quotient of $1,000 divided by the
       reset price.

     Conversion At The Option Of The Holder. At any time before the third
anniversary of the rate reset date, each outstanding share of Series A Preferred
Stock is convertible at the option of the holder into 24.779 shares of our
common stock, subject to certain anti-dilution adjustments and adjustment on the
rate reset date.

RESTRICTIONS AND LIMITATIONS ON ABILITY TO PAY DIVIDENDS

     Reference is made to "Description of Securities -- Common Stock -- Dividend
Rights and Policy; Restrictions on Dividends" and "-- Primary Source of Funds of
CMS Energy; Restrictions on Sources of Dividends" in the accompanying base
prospectus for information about our dividend policies and other matters
relating to dividends on our common stock, including restrictions and imitations
on our ability to pay such dividends. In addition to the restrictions and
limitations on payment of dividends described in the accompanying base
prospectus, CMS Energy is subject to the following contractual restrictions on
its ability to pay dividends:

  REVOLVING CREDIT FACILITY

     Under the terms of our Revolving Credit Facility, we have agreed that we
will not, and will not permit certain of our subsidiaries, directly or
indirectly, to:

     - declare or pay any dividend, payment or other distribution of assets,
       properties, cash, rights, obligations or securities on account of any
       shares of any class of our capital stock or the capital stock of
       subsidiaries; or

     - purchase, redeem, retire or otherwise acquire for value any such capital
       stock (each, a "restricted payment");

unless (1) there is no event of default under the Revolving Credit Facility (or
event that with the lapse of time or giving of notice would constitute an event
of default) which has occurred and is continuing, or would occur as a result of
the restricted payment, and (2) after giving

                                      S-21
<PAGE>   22

effect to any restricted payment described above, the aggregate amount of all
restricted payments made since September 30, 1993 does not exceed the sum of:

     - $120 million;

     - 100% of our consolidated net income from September 30, 1993 to the end of
       the most recent fiscal quarter ending at least 45 days prior to the date
       of the restricted payment (or, in the case of a deficit, minus 100% of
       the deficit); and

     - the aggregate net proceeds we have received for any issuance or sale of
       or contribution with respect to, our capital stock subsequent to
       September 30, 1993.

     At June 30, 2000, we could pay cash dividends of $1.951 billion pursuant to
this restriction.

  SENIOR DEBT INDENTURE

     Under the terms of an Indenture dated as of September 15, 1992, as amended
and supplemented, between us and Bank One (formerly NBD Bank), as Trustee,
pursuant to which we have issued our 7 3/8% Unsecured Notes Due 2000, 8 1/8%
Unsecured Notes Due 2002, 6.75% Senior Notes Due 2004, 7 5/8% Unsecured Notes
Due 2004, X-TRAS(SM) Pass-Through Trust I Certificates Due 2005, 9.875% Senior
Notes Due 2007, 7.5% Senior Notes Due 2009, 8% Senior Notes Due 2011, and 8 3/8%
Senior Notes Due 2013, so long as any of the notes issued thereunder are
outstanding and until those notes are rated BBB- or above (or an equivalent
rating) by Standard & Poor's and one other rating agency, at which time we will
be permanently released from the provisions of this limitation, we have agreed
that we will not, and will not permit any of our restricted subsidiaries,
directly or indirectly, to:

     - declare or pay any dividend or make any distribution on our capital stock
       to the direct or indirect holders of our capital stock (except dividends
       or distributions payable solely in our non-convertible capital stock (as
       defined in the Indenture) or in options, warrants or other rights to
       purchase such non-convertible capital stock and except dividends or other
       distributions payable to us or one of our subsidiaries);

     - purchase, redeem or otherwise acquire or retire for value any of our
       capital stock; or

     - purchase, repurchase, redeem, defease or otherwise acquire or retire for
       value, prior to the scheduled maturity or scheduled repayment thereof,
       any of our subordinated indebtedness (each, a "restricted payment");

if at the time of any restricted payment described above (1) an event of default
under the Indenture (or event that with the lapse of time or giving of notice
would constitute an event of default) has occurred and is continuing, or would
occur as a result of the restricted payment, or (2) after giving effect to any
restricted payment described above, the aggregate amount of all restricted
payments made since May 6, 1997 would exceed the sum of:

     - $100 million;

     - 100% of our consolidated net income from May 6, 1997 to the end of the
       most recent fiscal quarter ending at least 45 days prior to the date of
       the restricted payment (or, in the case of a deficit, minus 100% of the
       deficit); and

     - the aggregate net proceeds we have received for any issuance or sale of,
       or contribution with respect to, our capital stock subsequent to May 6,
       1997.

                                      S-22
<PAGE>   23

     At June 30, 2000, we could pay cash dividends of $985.9 million pursuant to
this restriction.

  GENERAL TERM NOTE INDENTURE

     Similarly, the Indenture, dated as of January 15, 1994, as amended and
supplemented, between us and The Chase Manhattan Bank, as Trustee, pursuant to
which we have issued our General Term Notes, Series A, Series B, Series C,
Series D, and Series E, provides that so long as any general term notes issued
thereunder are outstanding and until the notes are rated BBB- or above (or an
equivalent rating) by Standard & Poor's and one other rating agency, at which
time we will be permanently released from the provisions of this limitation, we
have agreed that we will not, and will not permit any of our restricted
subsidiaries, directly or indirectly, to:

     - declare or pay any dividend or make any distribution on our capital stock
       to the direct or indirect holders of our capital stock (except dividends
       or distributions payable solely in our non-convertible capital stock (as
       defined in the Indenture) or in options, warrants or other rights to
       purchase such non-convertible capital stock and except dividends or other
       distributions payable to us or one of our subsidiaries);

     - purchase, redeem or otherwise acquire or retire for value any of our
       capital stock; or

     - purchase, repurchase, redeem, or otherwise acquire or retire for value,
       prior to the scheduled maturity or scheduled repayment thereof, any of
       our subordinated indebtedness (each, a "restricted payment");

     if at the time of any restricted payment described above (1) an event of
default under the Indenture (or event that with the lapse of time or giving of
notice would constitute an event of default) has occurred and is continuing, or
would occur as a result of the restricted payment, or (2) after giving effect to
any restricted payment described above, the aggregate amount of all restricted
payments made since September 30, 1993 would exceed the sum of:

     - $120 million;

     - 100% of our consolidated net income from September 30, 1993 to the end of
       the most recent fiscal quarter ending at least 45 days prior to the date
       of the restricted payment (or, in the case of a deficit, minus 100% of
       the deficit); and

     - the aggregate net proceeds we have received for any issuance or sale of,
       or contribution with respect to, our capital stock subsequent to
       September 30, 1993.

     At June 30, 2000, we could pay cash dividends of $1.951 billion pursuant to
this restriction.

     The provisions described above do not prohibit (1) dividends or other
distributions in respect of capital stock issued in connection with the
acquisition of any business or assets by us where the payment of such dividends
or distributions are payable solely from the net earnings of such business or
assets, (2) any purchase or redemption of capital stock made by exchange for, or
out of the proceeds of the substantially concurrent sale of, our capital stock
(other than certain redeemable stock or exchangeable stock), (3) dividends paid
within 60 days after the date of declaration thereof if at the date of
declaration such dividends would have complied with the limitations described
above or (4) payments pursuant to the tax sharing agreement among us and our
subsidiaries.

                                      S-23
<PAGE>   24

  TRUST PREFERRED SECURITIES

     In June 1997, a CMS Energy affiliated trust issued $172.5 million of 7 3/4%
Convertible Trust Preferred Securities. The preferred securities are convertible
at the option of the holder into shares of CMS Energy common stock at an initial
conversion rate of 1.2255 shares of CMS Energy common stock for each preferred
security (equivalent to a purchase price of $40.80 per share of CMS Energy
common stock), subject to certain adjustments. On or after July 16, 2001, we
may, at our option, cause the conversion rights of the holders of the preferred
securities to expire upon certain conditions.

     In July 1999, a CMS Energy affiliated trust issued $300.875 million of
8.75% Adjustable Convertible Trust Securities. Each unit of adjustable
convertible trust securities obligates the holder to purchase from us not more
than 1.2121 and not less than 0.7830 shares of CMS Energy common stock based on
the average trading price of that common stock during a 20-day period ending
before July 1, 2002.

     In August 2000, a CMS Energy affiliated trust issued $220 million of 7 1/4%
Premium Equity Participating Security Units. Each unit of participating equity
participating securities obligates the holder to purchase from us, no later than
August 13, 2003, for a price of $25, the following number of CMS Energy common
stock:

     - if the average closing price of our common stock over the 20-trading day
       period ending on the third trading day prior to August 18, 2003 equals or
       exceeds $30.403, .8223 shares;

     - if the average closing price of our common stock over the same period is
       less than $30.403 but greater than $13.218, a number of shares having a
       value, based on the 20-trading day average closing price, equal to $25;
       and

     - if the average closing price of our common stock over the same period is
       less than or equal to $13.218, 1.8913 shares.

     Under the terms of the Indenture, dated June 1, 1997, between us and The
Bank of New York, as trustee, as amended and supplemented, and the guarantee
agreements dated June 20, 1997, July 8, 1999, August 22, 2000 between us and The
Bank of New York relating to the preferred securities of CMS Energy Trust I, CMS
Energy Trust II and CMS Energy Trust III pursuant to which the preferred
securities and the related 7 3/4% Convertible Subordinated Debentures due 2027,
the 8.750% Junior Subordinated Deferrable Interest Debentures due 2004, and the
7 1/4% Subordinated Deferrable Note due 2004 respectively, were issued, we have
agreed that we will not, and will not cause any of our subsidiaries to, declare
or pay any dividends or distributions on, or redeem, purchase, acquire or make a
liquidation payment with respect to, any of our capital stock, if at such time:

     - an event has occurred, of which we have actual knowledge, that with the
       giving of notice or the lapse of time, or both, would constitute an event
       of default and in respect of which we have not taken reasonable steps to
       cure;

     - we are in default with respect to the payment of any obligations under
       the Guarantee Agreement; or

     - we have given notice of our selection of an extension period as provided
       in the subordinated debt indenture with respect to the subordinated
       debentures and have not rescinded such notice, or such extension period
       (or any extension thereof) is continuing.

                                      S-24
<PAGE>   25

  DIVIDEND RESTRICTIONS UNDER MICHIGAN LAW

     Michigan law prohibits payment of a dividend if, after giving it effect, a
corporation would not be able to pay its debts as they become due in the usual
course of business, or its total assets would be less than the sum of its total
liabilities plus, unless the articles of incorporation provide otherwise, the
amount that would be needed, if the corporation were to be dissolved at the time
of the distribution, to satisfy the preferential rights upon dissolution of
shareholders whose preferential rights are superior to those receiving the
distribution (including the rights of holders of preferred stock, if any).

     Under the provisions of the Michigan Business Corporation Act, at June 30,
2000, our net assets available for the payment of dividends were $2.337 billion.

  CONSUMERS' DIVIDEND RESTRICTIONS

     Consumers' ability to pay dividends to CMS Energy is restricted by
Consumer's articles of incorporation and certain agreements to which it is a
party, as described under "Description of Securities -- Primary Source of Funds
of CMS Energy; Restrictions on Sources of Dividends" in the accompanying base
prospectus.

     Under the provisions of the Michigan Business Corporation Act, at June 30,
2000, Consumers' net assets available for payment of dividends were $1.867
billion. Under its articles of incorporation, the most restrictive dividend
limitation, Consumers would be able to pay $360 million in dividends. In August
2000, Consumers paid a $17 million common dividend.

  ENTERPRISES' DIVIDEND RESTRICTIONS

     The ability of CMS Energy to pay (i) dividends on its capital stock and
(ii) its indebtedness depends and will depend in part upon timely receipt of
sufficient dividends or other distributions from Enterprises. Enterprises'
ability to pay dividends to CMS Energy is restricted by Enterprises' articles of
incorporation. The articles of incorporation prohibit the payment of cash
dividends on its common stock if Enterprises is in arrears on preferred stock
dividend payments. It further provides that no dividends can be paid on the
Enterprises common stock except (i) out of surplus of Enterprises available for
distribution to stock over which the preferred stock has preference, or (ii) if,
at the time of declaration or payment of a distribution, there is not remaining
capital and surplus (after subtracting for dividends and distributions), in an
amount at least equal to 60 percent of the redemption price then in effect per
share on all then outstanding shares of the Enterprises preferred stock and
other preference stock of Enterprises.

     In addition, the Michigan Business Corporation Act prohibits payment of a
dividend if, after giving it effect (i) Enterprises would not be able to pay its
debts as they become due in the usual course of business, or (ii) its total
assets would be less than the sum of its total liabilities plus (unless the
articles permit otherwise) the amount that would be needed if Enterprises were
to be dissolved at the time of the distribution, to satisfy the preferential
rights upon dissolution of shareholders whose preferential rights are superior
to those receiving the distribution.

                                      S-25
<PAGE>   26

                                 TRANSFER AGENT

     CMS Energy common stock is transferable at the offices of Consumers Energy
Company, 212 W. Michigan Avenue, Jackson, MI 49201. The transfer agent and
registrar for CMS Energy common stock is CMS Energy.

                                  UNDERWRITING

     Under the terms and subject to the conditions contained in an underwriting
agreement dated October 16, 2000, we have agreed to sell to Credit Suisse First
Boston Corporation all of the shares of common stock.

     The underwriting agreement provides that the underwriter is obligated to
purchase all the shares of common stock in the offering, if any are purchased.

     The underwriter proposes to offer the shares of common stock initially at
the public offering price on the cover page of this prospectus supplement. The
underwriter may allow a discount of $.20 per share on sales to other
broker/dealers. After the initial public offering, the public offering price and
discount to broker/dealers may be changed by the underwriter.

     We estimate that our out of pocket expenses for this offering will be
approximately $130,000.

     CMS Energy has agreed that, without the prior written consent of the
underwriter, it will not offer, sell, contract to sell or otherwise dispose of
any shares of CMS Energy common stock, or any securities convertible into or
exercisable or exchangeable for CMS Energy common stock, or representing the
right to receive any of the foregoing securities, other than the common stock,
for a period of 60 days after the date of this prospectus supplement; provided
that CMS Energy may issue shares of its common stock upon conversion or
settlement of the 7 3/4% Convertible Trust Preferred Securities, 8.75%
Adjustable Convertible Trust Securities, 7 1/4% Premium Equity Participating
Security Units and Series A Mandatorily Convertible Preferred Stock in
accordance with their respective terms, and under its stock purchase plan,
performance incentive stock plan, employee stock ownership plan and employee
savings and incentive plan without the prior written consent of the
underwriters.

     We have agreed to indemnify the underwriter against liabilities under the
Securities Act, or contribute to payments that the underwriter may be required
to make in that respect.

     Credit Suisse First Boston Corporation and their affiliates have provided,
and continue to provide, investment banking and commercial banking services to
CMS Energy and its affiliates.

     In connection with the offering, the underwriter may engage in stabilizing
transactions, over-allotment transactions, syndicate covering transactions and
penalty bids in accordance with Regulation M under the Securities Exchange Act
of 1934.

     - Stabilizing transactions permit bids to purchase the underlying security
       so long as the stabilizing bids do not exceed a specified maximum.

     - Over-allotment involves sales by the underwriter of shares in excess of
       the number of shares the underwriter is obligated to purchase, which
       creates a syndicate short position. The short position may be either a
       covered short position or a naked short position. In a covered short
       position, the number of shares over-allotted by the

                                      S-26
<PAGE>   27

underwriters is not greater than the number of shares that they may purchase in
the over-allotment option. In a naked short position, the number of shares
involved is greater than the number of shares in the over-allotment option. The
      underwriter may close out any short position by either exercising their
      over-allotment option and/or purchasing shares in the open market.

     - Syndicate covering transactions involve purchases of the common stock in
       the open market after the distribution has been completed in order to
       cover syndicate short positions. In determining the source of shares to
       close out the short position, the underwriter will consider, among other
       things, the price of shares available for purchase in the open market as
       compared to the price at which they may purchase shares through the
       over-allotment option. If the underwriter sells more shares than could be
       covered by the over-allotment option, a naked short position, the
       position can only be closed out by buying shares in the open market. A
       naked short position is more likely to be created if the underwriter is
       concerned that there could be downward pressure on the price of the
       shares in the open market after pricing that could adversely affect
       investors who purchase in the offering.

     - Penalty bids permit the underwriter to reclaim a selling concession from
       a syndicate member when the common stock sold originally by the syndicate
       member is purchased in a stabilizing or syndicate covering transaction to
       cover short positions.

These stabilizing transactions and syndicate covering transactions may have the
effect of raising or maintaining the market price of our common stock or
preventing or retarding a decline in the market price of the common stock. As a
result, the price of our common stock may be higher than the price that might
otherwise exist in the open market. These transactions if commenced, may be
discontinued at any time.

                          NOTICE TO CANADIAN RESIDENTS

RESALE RESTRICTIONS

     The distribution of the common stock in Canada is being made only on a
private placement basis exempt from the requirement that we prepare and file a
prospectus with the securities regulatory authorities in each province where
trades of common stock are made. Any resale of the common stock in Canada must
be made under applicable securities laws which will vary depending on the
relevant jurisdiction, and which may require resales to be made under available
statutory exemptions or under a discretionary exemption granted by the
applicable Canadian securities regulatory authority. Purchasers are advised to
seek legal advice prior to any resale of the common stock.

REPRESENTATIONS OF PURCHASERS

     By purchasing common stock in Canada and accepting a purchase confirmation
a purchaser is representing to us and the dealer from whom the purchase
confirmation is received that

     - the purchaser is entitled under applicable provincial securities laws to
       purchase the common stock without the benefit of a prospectus qualified
       under those securities laws,

     - where required by law, that the purchaser is purchasing as principal and
       not as agent, and

     - the purchaser has reviewed the text above under Resale Restrictions.

                                      S-27
<PAGE>   28

RIGHTS OF ACTION (ONTARIO PURCHASERS)

     The securities being offered are those of a foreign issuer and Ontario
purchasers will not receive the contractual right of action prescribed by
Ontario securities law. As a result, Ontario purchasers must rely on other
remedies that may be available, including common law rights of action for
damages or rescission or rights of action under the civil liability provisions
of the U.S. federal securities laws.

ENFORCEMENT OF LEGAL RIGHTS

     All of the issuer's directors and officers as well as the experts named
herein may be located outside of Canada and, as a result, it may not be possible
for Canadian purchasers to effect service of process within Canada upon the
issuer or such persons. All or a substantial portion of the assets of the issuer
and such persons may be located outside of Canada and, as a result, it may not
be possible to satisfy a judgment against the issuer or such persons in Canada
or to enforce a judgment obtained in Canadian courts against such issuer or
persons outside of Canada.

NOTICE TO BRITISH COLUMBIA RESIDENTS

     A purchaser of common stock to whom the Securities Act (British Columbia)
applies is advised that the purchaser is required to file with the British
Columbia Securities Commission a report within ten days of the sale of any
common stock acquired by the purchaser in this offering. The report must be in
the form attached to British Columbia Securities Commission Blanket Order BOR
#95/17, a copy of which may be obtained from us. Only one report must be filed
for common stock acquired on the same date and under the same prospectus
exemption.

TAXATION AND ELIGIBILITY FOR INVESTMENT

     Canadian purchasers of common stock should consult their own legal and tax
advisors with respect to the tax consequences of an investment in the common
stock in their particular circumstances and about the eligibility of the common
stock for investment by the purchaser under relevant Canadian legislation.

                                 LEGAL OPINIONS

     Opinions as to the legality of the common stock will be rendered for CMS
Energy by Michael D. Van Hemert, Assistant General Counsel for CMS Energy.
Certain legal matters with respect to the common stock will be passed upon by
Skadden, Arps, Slate, Meagher & Flom LLP. As of June 30, 2000, an attorney
currently employed by Skadden, Arps, Slate, Meagher & Flom LLP, and formerly
employed by CMS, owned approximately 51,734 shares of CMS common stock, 10
shares of Consumers $4.50 Series preferred stock, $100 par value, and $50,000
aggregate principal amount of certain debt securities issued by CMS. As of June
30, 2000, Mr. Van Hemert beneficially owned approximately 4,500 shares of CMS
common stock.

                                      S-28
<PAGE>   29

                                    EXPERTS

     The consolidated financial statements and schedule of CMS Energy as of
December 31, 1999 and 1998, and for each of the three years in the period ended
December 31, 1999 incorporated by reference in this prospectus supplement and
the accompanying prospectus have been audited by Arthur Andersen LLP,
independent public accountants, as indicated in their reports with respect
thereto, and are included herein in reliance upon the authority of said firm as
experts in accounting and auditing in giving said reports.

     With respect to the unaudited interim consolidated financial information
for the periods ended March 31 and June 30, 2000 and 1999, Arthur Andersen LLP
has applied limited procedures in accordance with professional standards for a
review of such information. However, their separate report thereon states that
they did not audit and they did not express an opinion on that interim
consolidated financial information. Accordingly, the degree of reliance on their
report on that information should be restricted in light of the limited nature
of the review procedures applied. In addition, the accountants are not subject
to the liability provisions of Section 11 of the Securities Act for their report
on the unaudited interim consolidated financial information because that report
is not a "report" or "part" of the registration statement prepared or certified
by the accountants within the meaning of Sections 7 and 11 of the Securities
Act.

     Future consolidated financial statements of CMS Energy and the reports
thereon of Arthur Andersen LLP also will be incorporated by reference in this
prospectus supplement and the accompanying prospectus in reliance upon the
authority of that firm as experts in giving those reports to the extent that
said firm has audited said consolidated financial statements and consented to
the use of their reports thereon.

                                      S-29
<PAGE>   30

                             CMS ENERGY CORPORATION

                 UNAUDITED PRO FORMA COMBINED INCOME STATEMENT

                      FOR THE YEAR ENDED DECEMBER 31, 1999
                (DOLLARS IN MILLIONS, EXCEPT PER SHARE AMOUNTS)
<TABLE>
<CAPTION>
                                               PANHANDLE COMPANIES
                                            PRE-ACQUISITION PRO FORMA             PRO FORMA ACQUISITION
                                     ----------------------------------------   --------------------------
                                                                  ELIMINATION
                           CMS                    RESTRUCTURING     OF DUKE
                         ENERGY      PANHANDLE         AND          ENERGY      ACQUISITION    FINANCING
                       HISTORICAL    HISTORICAL    REALIGNMENT    ACTIVITIES    ADJUSTMENTS   TRANSACTIONS
                       -----------   ----------   -------------   -----------   -----------   ------------
<S>                    <C>           <C>          <C>             <C>           <C>           <C>
Operating revenue....    $6,103         $133           $--           $ (3)(b)       $(2)(g)       $ --
Operating expenses
Operations and
 maintenance.........     4,342           43            (1)(a)          4(c)
Depreciation and
 amortization........       595           14            (1)(a)         (1)(d)         2(h)
Property and other
 taxes...............       254            7            --             --
                         ------         ----           ---           ----           ---           ----
                          5,191           64            (2)             3             2             --
                         ------         ----           ---           ----           ---           ----
Pretax operating
 income..............       912           69             2             (6)           (4)            --
Other income
 (deductions)........        10            5
Fixed charges........       581           19             2            (13)(e)                       48(j)
                                                                                                    (9)(k)
Income before income
 taxes...............       341           55            --              7            (4)           (39)
Income taxes.........        64           21            --              2(f)         (1)(i)        (13)(l)
                         ------         ----           ---           ----           ---           ----
Consolidated net
 income..............    $  277         $ 34           $--           $  5           $(3)          $(26)
                         ======         ====           ===           ====           ===           ====
Basic earnings per
 average common share
 CMS Energy..........    $ 2.18(o)
                         ======
 Class G.............    $ 4.21(o)
                         ======
Diluted earnings per
 average common share
 CMS Energy..........    $ 2.17(o)
                         ======
 Class G.............    $ 4.21(o)
                         ======
Average common shares
 outstanding
 CMS Energy..........       110
                         ======
 Class G.............         9(o)
                         ======

<CAPTION>

                        PRO FORMA ACQUISITION
                       ------------------------

                                         CMS
                       INTERCOMPANY    ENERGY
                       ELIMINATIONS   PRO FORMA
                       ------------   ---------
<S>                    <C>            <C>
Operating revenue....      $ (4)(n)    $6,216
                            (11)(m)
Operating expenses
Operations and
 maintenance.........        (2)(n)     4,375
                            (11)(m)
Depreciation and
 amortization........        (1)(n)       608
Property and other
 taxes...............                     261
                           ----        ------
                            (14)        5,244
                           ----        ------
Pretax operating
 income..............        (1)          972
Other income
 (deductions)........                      15
Fixed charges........                     628
Income before income
 taxes...............        (1)          359
Income taxes.........        (1)           72
                           ----        ------
Consolidated net
 income..............      $ --        $  287
                           ====        ======
Basic earnings per
 average common share
 CMS Energy..........                  $ 2.27(o)
                                       ======
 Class G.............                  $ 4.21(o)
                                       ======
Diluted earnings per
 average common share
 CMS Energy..........                  $ 2.26(o)
                                       ======
 Class G.............                  $ 4.21(o)
                                       ======
Average common shares
 outstanding
 CMS Energy..........                     110
                                       ======
 Class G.............                       9(o)
                                       ======
</TABLE>

See accompanying Notes to Unaudited Pro Forma Combined Income Statement.

                                       F-1
<PAGE>   31

                             CMS ENERGY CORPORATION

             NOTES TO UNAUDITED PRO FORMA COMBINED INCOME STATEMENT

                      FOR THE YEAR ENDED DECEMBER 31, 1999

RESTRUCTURING AND REALIGNMENT:

     (a) To reflect the results of operations of Panhandle Storage Company and
Trunkline LNG Company, both acquired by CMS Energy, and the transfer of
Panhandle's interest in Northern Border Partners LP and certain non-operating
assets to other subsidiaries of Duke Energy under the provisions of the Stock
Purchase Agreement.

ELIMINATION OF DUKE ENERGY ACTIVITIES:

     (b) To reflect the elimination of rental income earned by Panhandle on an
office building, which was transferred to Duke Energy under the provisions of
the Stock Purchase Agreement.

     (c) To reflect the elimination of pension income recognized by Panhandle on
the overfunded pension plans of Duke Energy. Under the provisions of the Stock
Purchase Agreement, Duke Energy transferred to CMS Energy an amount of pension
assets equivalent to the Panhandle Companies' liabilities assumed by CMS Energy.

     (d) To reflect the elimination of deprecation associated with an office
building and certain other assets, which were transferred to Duke Energy under
the provisions of the Stock Purchase Agreement.

     (e) To reflect a reduction in interest expense relating to the settlement
of certain short-term notes payable to Duke Energy under the provisions of the
Stock Purchase Agreement.

     (f) To reflect the income tax expense effects of the pro forma adjustments
(b) through (e) at an estimated rate of 35%.

ACQUISITION ADJUSTMENTS:

     (g) To reflect the elimination of non-cash amortization of deferred credits
associated with a Trunkline LNG Company rate settlement.

     (h) To reflect depreciation expense on the fair value of property, plant
and equipment prospectively depreciated over a revised estimated average
remaining life of 40 years. Also reflects amortization expense over a 40-year
period of the estimated goodwill recognized in the Acquisition.

     (i) To reflect the income tax expense effects of pro forma adjustment (g)
and (h) at an estimated rate of 35%.

FINANCING TRANSACTIONS:

     (j) To reflect the increase of interest expense relating to the issuance of
$800 million of Panhandle senior notes with a weighted average interest rate of
6.8% and $1.1 billion of CMS Energy senior notes and trust preferred securities
with a weighted average interest rate of 7.5%.

                                       F-2
<PAGE>   32
                             CMS ENERGY CORPORATION

     NOTES TO UNAUDITED PRO FORMA COMBINED INCOME STATEMENT -- (CONTINUED)

                      FOR THE YEAR ENDED DECEMBER 31, 1999

     (k) To reflect the elimination of interest expense incurred in connection
with the utilization of bridge financing facilities.

     (l) To reflect the income tax expense effects of pro forma adjustment (j)
and (k) at an estimated rate of 35%.

INTERCOMPANY ELIMINATIONS:

     (m) To reflect the elimination of intercompany transactions between CMS
Energy and the Panhandle Companies.

     (n) To eliminate three days of activity subsequent to the acquisition which
is included in CMS Energy historical amounts.

OTHER:

     (o) Reflects Class G common stock as outstanding from January 1, 1999 to
October 25, 1999. Reflects the reallocation of net income and earnings per share
as a result of the premium on exchange of Class G common stock. As a result, CMS
Energy's basic and diluted earnings per share were reduced $0.26 and $0.25,
respectively, and Class G's basic and diluted earnings per share were increased
$3.31.

                                       F-3
<PAGE>   33

                             CMS ENERGY CORPORATION

                 UNAUDITED PRO FORMA COMBINED INCOME STATEMENT
                     FOR THE SIX MONTHS ENDED JUNE 30, 1999

                (DOLLARS IN MILLIONS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                              PANHANDLE COMPANIES
                                           PRE-ACQUISITION PRO FORMA                           PRO FORMA ACQUISITION
                                    ----------------------------------------   -----------------------------------------------------
                                                                 ELIMINATION
                                                 RESTRUCTURING     OF DUKE                                                    CMS
                       CMS ENERGY   PANHANDLE         AND          ENERGY      ACQUISITION    FINANCING     INTERCOMPANY    ENERGY
                       HISTORICAL   HISTORICAL    REALIGNMENT    ACTIVITIES    ADJUSTMENTS   TRANSACTIONS   ELIMINATIONS   PRO FORMA
                       ----------   ----------   -------------   -----------   -----------   ------------   ------------   ---------
<S>                    <C>          <C>          <C>             <C>           <C>           <C>            <C>            <C>
Operating revenue....   $ 2,869        $133          $  --         $   (3)(b)      $(2)(g)       $ --          $  (4)(n)    $2,982
                                                                                                                 (11)(m)
Operating expenses
 Operations and
 maintenance.........     1,979          43             (1)(a)          4(c)                                      (2)(n)     2,012
                                                                                                                 (11)(m)
Depreciation and
 amortization........       288          14             (1)(a)         (1)(d)        2(h)                         (1)(n)       301
Property and other
 taxes...............       126           7             --             --                                                      133
                        -------        ----          -----         ------          ---           ----          -----        ------
                          2,393          64             (2)             3            2             --            (14)        2,446
                        -------        ----          -----         ------          ---           ----          -----        ------
Pretax operating
 income..............       476          69              2             (6)          (4)            --             (1)          536
Other income
 (deductions)........        17           5                                                                                     22
Fixed charges........       253          19              2            (13)(e)                      (9)(k)                      300
                                                                                                   48(j)
Income before income
 taxes...............       240          55             --              7           (4)           (39)            (1)          258
Income taxes.........        67          21             --            2(f)          (1)(i)        (14)(l)         (1)           74
                        -------        ----          -----         ------          ---           ----          -----        ------
Consolidated net
 income..............   $   173        $ 34          $  --         $    5          $(3)          $(25)         $  --        $  184
                        =======        ====          =====         ======          ===           ====          =====        ======
Basic earnings per
 average common share
 CMS Energy..........   $  1.50                                                                                             $ 1.59
                        =======                                                                                             ======
 Class G.............   $  1.28                                                                                             $ 1.28
                        =======                                                                                             ======
Diluted earnings per
 average common share
 CMS Energy..........   $  1.48                                                                                             $ 1.57
                        =======                                                                                             ======
 Class G.............   $  1.28                                                                                             $ 1.28
                        =======                                                                                             ======
Average common shares
 outstanding CMS
 Energy..............       108                                                                                                108
                        =======                                                                                             ======
 Class G.............         9                                                                                                  9
                        =======                                                                                             ======
</TABLE>

See accompanying Notes to Unaudited Pro Forma Combined Income Statement.

                                       F-4
<PAGE>   34

                             CMS ENERGY CORPORATION

             NOTES TO UNAUDITED PRO FORMA COMBINED INCOME STATEMENT

                     FOR THE SIX MONTHS ENDED JUNE 30, 1999

RESTRUCTURING AND REALIGNMENT:

     (a) To reflect the results of operations of Panhandle Storage Company and
Trunkline LNG Company, both acquired by CMS Energy, and the transfer of
Panhandle's interest in Northern Border Partners LP and certain non-operating
assets to other subsidiaries of Duke Energy under the provisions of the Stock
Purchase Agreement.

ELIMINATION OF DUKE ENERGY ACTIVITIES:

     (b) To reflect the elimination of rental income earned by Panhandle on an
office building, which was transferred to Duke Energy under the provisions of
the Stock Purchase Agreement.

     (c) To reflect the elimination of pension income recognized by Panhandle on
the overfunded pension plans of Duke Energy. Under the provisions of the Stock
Purchase Agreement, Duke Energy transferred to CMS Energy an amount of pension
assets equivalent to the Panhandle Companies' liabilities assumed by CMS Energy.

     (d) To reflect the elimination of deprecation associated with an office
building and certain other assets, which were transferred to Duke Energy under
the provisions of the Stock Purchase Agreement.

     (e) To reflect a reduction in interest expense relating to the settlement
of certain short-term notes payable to Duke Energy under the provisions of the
Stock Purchase Agreement.

     (f) To reflect the income tax expense effects of the pro forma adjustments
(b) through (e) at an estimated rate of 35%.

ACQUISITION ADJUSTMENTS:

     (g) To reflect the elimination of non-cash amortization of deferred credits
associated with a Trunkline LNG Company rate settlement.

     (h) To reflect depreciation expense on the fair value of property, plant
and equipment prospectively depreciated over a revised estimated average
remaining life of 40 years. Also reflects amortization expense over a 40-year
period of the estimated goodwill recognized in the Acquisition.

     (i) To reflect the income tax expense effects of pro forma adjustment (g)
and (h) at an estimated rate of 35%.

FINANCING TRANSACTIONS:

     (j) To reflect the increase of interest expense relating to the issuance of
$800 million of Panhandle senior notes with a weighted average interest rate of
6.8% and $1.1 billion of CMS Energy senior notes and trust preferred securities
with a weighted average interest rate of 7.5%.

                                       F-5
<PAGE>   35
                             CMS ENERGY CORPORATION

     NOTES TO UNAUDITED PRO FORMA COMBINED INCOME STATEMENT -- (CONTINUED)

                     FOR THE SIX MONTHS ENDED JUNE 30, 1999

     (k) To reflect the elimination of interest expense incurred in connection
with the utilization of bridge financing facilities.

     (l) To reflect the income tax expense effects of pro forma adjustments (j)
and (k)at an estimated rate of 35%.

INTERCOMPANY ELIMINATIONS:

     (m) To reflect the elimination of intercompany transactions between CMS
Energy and the Panhandle Companies.

     (n) To eliminate three days of activity subsequent to the acquisition which
is included in CMS Energy historical amounts.

                                       F-6
<PAGE>   36

                             CMS ENERGY CORPORATION

                            CMS ENERGY COMMON STOCK
                              CLASS G COMMON STOCK
                               SENIOR DEBENTURES
                            SUBORDINATED DEBENTURES
                            STOCK PURCHASE CONTRACTS
                              STOCK PURCHASE UNITS
                                   GUARANTEES
                                      AND
                              CMS ENERGY TRUST II
                              CMS ENERGY TRUST III
                           TRUST PREFERRED SECURITIES
                  GUARANTEED TO THE EXTENT SET FORTH HEREIN BY
                             CMS ENERGY CORPORATION

                         OFFERING PRICE: $1,500,000,000

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

We may offer, from time to time:

     (i) shares of CMS Energy Common Stock,
     (ii) shares of Class G Common Stock,
     (iii) unsecured senior or subordinated debt securities consisting of
debentures, convertible debentures, notes and other unsecured evidence of
indebtedness,
     (iv) stock purchase contracts to purchase CMS Energy Common Stock,
     (v) stock purchase units, each representing ownership of a stock purchase
contract and unsecured senior or subordinated debt securities or trust preferred
securities or debt obligations of third parties, including U.S. Treasury
Securities, securing the holder's obligation to purchase the CMS Energy Common
Stock under the stock purchase contract, or any combination of the above, and
     (vi) Guarantees of CMS Energy with respect to Trust Preferred Securities of
CMS Energy Trusts II and III.

For each type of securities listed above, the amount, price and terms will be
determined at or prior to the time of sale.

CMS Energy Trust II and CMS Energy Trust III, which are Delaware business
trusts, may offer trust preferred securities. The trust preferred securities
represent preferred undivided beneficial interests in the assets of CMS Energy
Trust II and CMS Energy Trust III in amounts, at prices and on terms to be
determined at or prior to the time of sale.

We will provide the specific terms of these securities in an accompanying
prospectus supplement or supplements. You should read this prospectus and the
accompanying prospectus supplement or supplements carefully before you invest.

CMS Energy Common Stock and Class G Common Stock are traded on the New York
Stock Exchange under the symbol "CMS". CMS Energy Common Stock and Class G
Common Stock sold pursuant to a prospectus supplement or supplements
accompanying this prospectus will also be listed for trading on the New York
Stock Exchange, subject to official notice of issuance.

Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or passed upon the
accuracy or adequacy of this prospectus. Any representation to the contrary is a
criminal offense.

We intend to sell these securities through underwriters, dealers, agents or
directly to a limited number of purchasers. The names of, and any securities to
be purchased by or through, these parties, the compensation of these parties and
other special terms in connection with the offering and sale of these securities
will be provided in the related prospectus supplement or supplements.

This prospectus may not be used to consummate sales of any of these securities
unless accompanied by a prospectus supplement.

                   The date of this prospectus is May 7, 1999
<PAGE>   37

     NO PERSON IS AUTHORIZED IN CONNECTION WITH THE OFFERING MADE HEREBY TO GIVE
ANY INFORMATION OR TO MAKE ANY REPRESENTATION NOT CONTAINED OR INCORPORATED BY
REFERENCE IN THIS PROSPECTUS OR ANY PROSPECTUS SUPPLEMENT, AND ANY INFORMATION
OR REPRESENTATION NOT CONTAINED OR INCORPORATED HEREIN MUST NOT BE RELIED UPON
AS HAVING BEEN AUTHORIZED BY CMS ENERGY OR ANY UNDERWRITER, DEALER OR AGENT.
THIS PROSPECTUS AND ANY PROSPECTUS SUPPLEMENT DO NOT CONSTITUTE AN OFFER TO SELL
OR THE SOLICITATION OF AN OFFER TO BUY ANY SECURITIES OTHER THAN THE SECURITIES
TO WHICH THEY RELATE OR AN OFFER TO SELL OR THE SOLICITATION OF AN OFFER TO BUY
SUCH SECURITIES IN ANY CIRCUMSTANCES IN WHICH SUCH OFFER OR SOLICITATION IS
UNLAWFUL. NEITHER THE DELIVERY OF THIS PROSPECTUS OR ANY PROSPECTUS SUPPLEMENT
NOR ANY SALE MADE HEREUNDER OR THEREUNDER SHALL, UNDER ANY CIRCUMSTANCES, CREATE
ANY IMPLICATION THAT THE INFORMATION CONTAINED OR INCORPORATED HEREIN OR THEREIN
IS CORRECT AS OF ANY TIME SUBSEQUENT TO THE DATE OF SUCH INFORMATION.

                             AVAILABLE INFORMATION

     CMS Energy is subject to the informational requirements of the Securities
Exchange Act of 1934, as amended (the "EXCHANGE ACT"), and in accordance
therewith files reports and other information with the Securities and Exchange
Commission (the "COMMISSION"). Information, as of particular dates, concerning
CMS Energy's directors and officers, their remuneration, the principal holders
of CMS Energy's securities and any material interest of such persons in
transactions with CMS Energy is disclosed in proxy statements distributed to
shareholders of CMS Energy and filed with the Commission. Such reports, proxy
statements and other information may be inspected and copied at the public
reference facilities maintained by the Commission at Judiciary Plaza, 450 Fifth
Street, N.W., Washington, D.C. 20549, and at the Commission's Regional Offices
located at 500 West Madison Street, Chicago, Illinois 60661 and at Seven World
Trade Center, 13th Floor, New York, New York 10048. Copies of such materials can
be obtained by mail from the Public Reference Section of the Commission at 450
Fifth Street, N.W., Washington, D.C. 20549 at prescribed rates. The Commission
also maintains a Web site (http://www.sec.gov) that contains reports, proxy
statements and other information regarding CMS Energy. The outstanding shares of
CMS Energy Common Stock and Class G Common Stock are listed on the New York
Stock Exchange ("NYSE") and reports, proxy statements and other information
concerning CMS Energy may also be inspected and copied at the offices of such
exchange at 20 Broad Street, New York, New York 10005.

     No separate financial statements of the Trusts have been included herein.
CMS Energy and the Trusts do not consider that such financial statements would
be material to holders of Trust Preferred Securities because each Trust is a
newly organized special purpose entity, has no operating history and no
independent operations and is not engaged in, and does not propose to engage in,
any activity other than as described under "CMS Energy Trusts". Further, CMS
Energy believes that financial statements of the Trusts are not material to the
holders of the Trust Preferred Securities since CMS Energy will guarantee the
Trust Preferred Securities such that the holders of the Trust Preferred

                                        2
<PAGE>   38

Securities, with respect to the payment of distributions and amounts upon
liquidation, dissolution and winding-up, are at least in the same position
vis-a-vis the assets of CMS Energy as a preferred stockholder of CMS Energy. CMS
Energy beneficially owns directly or indirectly all of the undivided beneficial
interests in the assets of the Trusts (other than the beneficial interests
represented by the Trust Preferred Securities). See "CMS Energy Trusts,"
"Description of Securities -- Trust Preferred Securities" and "Description of
Securities -- The Guarantees." In future filings under the Exchange Act, an
audited footnote to CMS Energy's annual financial statements will state that the
Trusts are wholly-owned by CMS Energy, that the sole assets of the Trusts are
the Senior Debentures or the Subordinated Debentures of CMS Energy having a
specified aggregate principal amount, and, considered together, the back-up
undertakings, including the Guarantees, constitute a full and unconditional
guarantee by CMS Energy of the Trusts' obligations under the Trust Preferred
Securities issued by the Trusts.

                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The following documents filed by CMS Energy (File No. 1-9513) with the
Commission pursuant to the Exchange Act are hereby incorporated by reference in
this prospectus and shall be deemed to be a part hereof:

     (1) CMS Energy's Registration Statement on Form 8-B/A dated November 21,
         1996;

     (2) CMS Energy's Annual Report on Form 10-K for the year ended December 31,
         1998; and

     (3) CMS Energy's Current Reports on Form 8-K filed January 20 and April 6,
         1999.

     All documents subsequently filed by CMS Energy pursuant to Section 13(a),
13(c), 14 or 15(d) of the Exchange Act and prior to the termination of the
offering made by this prospectus (the "OFFERING") shall be deemed to be
incorporated by reference herein and shall be deemed to be a part hereof from
the date of filing of such documents (such documents, and the documents
enumerated above, being hereinafter referred to as "INCORPORATED DOCUMENTS").
Any statement contained in an Incorporated Document shall be deemed to be
modified or superseded for purposes of this prospectus to the extent that a
statement contained herein or in any other subsequently filed Incorporated
Document modifies or supersedes such statement. Any such statement so modified
or superseded shall not be deemed, except as so modified or superseded, to
constitute a part of this prospectus.

     CMS Energy undertakes to provide without charge to each person, including
any beneficial owner, to whom a copy of this prospectus has been delivered, upon
the written or oral request of any such person, a copy of any and all of the
documents referred to above which have been or may be incorporated in this
prospectus by reference, other than exhibits to such documents (unless such
exhibits are specifically incorporated by reference into such documents).
Requests for such copies should be directed to CMS Energy at its principal
executive offices located at Fairlane Plaza South, Suite 1100, 330 Town Center
Drive, Dearborn, Michigan 48126, Attention: Office of the Secretary, telephone:
(313) 436-9200.

     Certain information contained in this prospectus summarizes, is based upon,
or refers to information and financial statements contained in one or more
Incorporated Documents;

                                        3
<PAGE>   39

accordingly, such information contained herein is qualified in its entirety by
reference to such documents and should be read in conjunction therewith.

                             CMS ENERGY CORPORATION

     CMS Energy Corporation, a Michigan corporation ("CMS ENERGY") incorporated
in 1987, is the parent holding company of Consumers Energy Company ("CONSUMERS")
and CMS Enterprises Company ("ENTERPRISES"). Consumers, a combination electric
and gas utility company serving all 68 counties of Michigan's Lower Peninsula,
is the largest subsidiary of CMS Energy. Consumers' customer base includes a mix
of residential, commercial and diversified industrial customers, the largest
segment of which is the automotive industry. Enterprises is engaged in several
domestic and international energy-related businesses including: (i) oil and gas
exploration and production; (ii) acquisition, development and operation of
independent power production facilities; (iii) energy marketing, services and
trading; (iv) storage, transmission and processing of natural gas; and (v)
international energy distribution.

     CMS Energy conducts its principal operations through the following six
business segments: (i) electric utility operations; (ii) gas utility operations;
(iii) oil and gas exploration and production operations; (iv) independent power
production; (v) energy marketing, services and trading; and (vi) storage,
transmission and processing of natural gas. Consumers or Consumers' subsidiaries
are engaged in two segments: electric operations and gas operations. Consumers'
electric and gas businesses are principally regulated utility operations. CMS
Energy and its subsidiaries routinely evaluate, invest in, acquire and divest
energy-related assets and/or companies both domestically and internationally.
Consideration for such transactions may involve the delivery of cash or
securities.

     CMS Energy's 1998 consolidated operating revenue was $5.1 billion. This
consolidated operating revenue was derived from its electric utility operations
(approximately 51%), its gas utility operations (approximately 21%), marketing,
services and trading (approximately 18%), independent power production and other
non-utility activities (approximately 6%), gas transmission, storage and
processing activities (approximately 3%), and oil and gas exploration and
production activities (approximately 1%). Consumers' consolidated operations in
the electric and gas utility businesses account for the majority of CMS Energy's
total assets, revenue and income. The unconsolidated share of non-utility
independent power production, gas transmission and storage, marketing services
and trading, and international energy distribution revenue for 1998 was $1.317
billion.

     Consumers is a public utility serving gas or electricity to almost six
million of Michigan's nine and a half million residents in Michigan's Lower
Peninsula. Industries in Consumers' service area include automotive, metal,
chemical, food and wood products industries and a diversified group of other
industries. Consumers' 1998 consolidated operating revenue of $3.7 billion was
derived approximately 70% from its electric utility business, approximately 29%
from its gas utility business and approximately 1% from its non-utility
business. Consumers' rates and certain other aspects of its business are subject
to the jurisdiction of the Michigan Public Service Commission (the "MPSC") and
the Federal Energy Regulatory Commission. Consumers' nuclear operations are
subject to the jurisdiction of the Nuclear Regulatory Commission.

                                        4
<PAGE>   40

     CMS Energy and its subsidiaries routinely evaluate, invest in, acquire and
divest energy-related assets and/or businesses both domestically and
internationally. Consideration for such transactions may involve the delivery of
cash or securities.

     The foregoing information concerning CMS Energy and it subsidiaries does
not purport to be comprehensive. For additional information concerning CMS
Energy and its subsidiaries' business and affairs, including their capital
requirements and external financing plans, pending legal and regulatory
proceedings and descriptions of certain laws and regulations to which those
companies are subject, prospective purchasers should refer to the Incorporated
Documents. See "Incorporation of Certain Documents by Reference" and "Available
Information" above.

     The address of the principal executive offices of CMS Energy is Fairlane
Plaza South, 330 Town Center Drive, Suite 1100, Dearborn, Michigan 48126. Its
telephone number is (313) 436-9200.

                              RECENT DEVELOPMENTS

ACQUISITION OF THE PANHANDLE COMPANIES

     On March 29, 1999 we acquired from Duke Energy Corporation all of the
outstanding common stock of Panhandle Eastern Pipe Line Company ("PANHANDLE")
and its principal subsidiaries, Trunkline Gas Company ("TRUNKLINE") and Pan Gas
Storage Company, as well as its affiliates, Panhandle Storage Company and
Trunkline LNG Company ("TRUNKLINE LNG" and, collectively, the "PANHANDLE
COMPANIES"). We paid $1.9 billion in cash to Duke Energy Corporation and assumed
approximately $300 million of existing Panhandle debt.

     The Panhandle Companies are primarily engaged in the interstate
transmission and storage of natural gas. The Panhandle Companies operate one of
the nation's largest natural gas pipeline networks, providing customers in the
Midwest and Southwest with a comprehensive array of transportation services.
This interconnected 10,400 mile system accesses virtually all major natural gas
regions in the United States.

     Panhandle's transmission system consists of four large-diameter parallel
pipelines and extends approximately 1,300 miles from producing areas in the
Anadarko Basin of Texas, Oklahoma and Kansas through the states of Missouri,
Illinois, Indiana and Ohio into Michigan. Panhandle's system connects with the
Trunkline system at Tuscola, Illinois.

     Trunkline's transmission system consists principally of three
large-diameter parallel pipelines extending approximately 1,400 miles from the
Gulf Coast areas of Texas and Louisiana through the states of Arkansas,
Mississippi, Tennessee, Kentucky, Illinois and Indiana to a point on the
Indiana-Michigan border. Trunkline also owns and operates two offshore Louisiana
natural gas supply systems consisting of 337 miles of pipeline extending
approximately 81 miles into the Gulf of Mexico.

     Panhandle's major customers include approximately 20 utilities located in
the Midwest market area that encompasses large portions of Michigan, Ohio,
Indiana, Illinois and Missouri. Trunkline's major customers include six
utilities located in portions of Illinois, Indiana, Michigan, Ohio and
Tennessee. Transportation service for Consumers accounted for approximately 10%
of the combined revenue of the Panhandle Companies.

                                        5
<PAGE>   41

     The Panhandle Companies own and operate five underground gas storage fields
located in Illinois, Michigan, Kansas, Oklahoma and Louisiana with a combined
maximum working gas storage capacity of 70 billion cubic feet.

     Trunkline LNG owns a liquified natural gas ("LNG") regasification plant and
related LNG tanker port, unloading facilities and LNG and gas storage facilities
located at Lake Charles, Louisiana. The LNG plant has the capacity to deliver
700 million cubic feet per day but has been operated on a limited basis for a
number of years.

     The rates and operations of the Panhandle Companies are subject to
regulation by the Federal Energy Regulatory Commission.

     We used approximately $600 million in bridge financing, $500 million in
revolving credit loans and $800 million of senior unsecured notes issued by CMS
Panhandle Holding Company to fund the cash portion of the purchase price for the
acquisition of the Panhandle Companies. We expect to complete permanent
financing of the acquisition with existing arrangements and the sale of
approximately $600 million of our common stock and/or other securities.

     Please refer to our Forms 8-K filed January 20 and April 6, 1999 for
further information concerning this transaction.

                               CMS ENERGY TRUSTS

     CMS Energy Trust II and CMS Energy Trust III are statutory business trusts
formed under the Delaware Business Trust Act (the "TRUST ACT") (each, a "TRUST"
and collectively, the "TRUSTS") pursuant to: (i) a trust agreement executed by
CMS Energy, as sponsor, and the trustees of the Trusts (the "CMS TRUSTEES"); and
(ii) the filing of a certificate of trust with the Secretary of State of the
State of Delaware. At the time of public issuance of Trust Preferred Securities,
each trust agreement will be amended and restated in its entirety (as so amended
and restated, the "TRUST AGREEMENT") and will be qualified as an indenture under
the Trust Indenture Act of 1939, as amended (the "TRUST INDENTURE ACT"). CMS
Energy will directly or indirectly acquire common securities of each Trust (the
"COMMON SECURITIES" and, together with the Trust Preferred Securities, the
"TRUST SECURITIES") in an aggregate liquidation amount equal to approximately 3%
of the total capital of the Trust. Each Trust exists for the exclusive purposes
of: (i) issuing the Trust Preferred Securities and Common Securities
representing undivided beneficial interests in the assets of the Trust; (ii)
investing the gross proceeds of the Trust Securities in the Senior Debentures or
Subordinated Debentures; and (iii) engaging in only those other activities
necessary or incidental thereto. Each Trust has a term of approximately 30
years, but may terminate earlier as provided in the Trust Agreement.

     The undivided common beneficial interests in the Trust will be owned by CMS
Energy. The proceeds from the offering of the Trust Preferred Securities and the
sale of the Common Securities may be contributed by the Trust to purchase from
CMS Energy Senior Debentures or Subordinated Debentures in an aggregate
principal amount equal to the aggregate liquidation preference of the Trust
Securities, bearing interest at an annual rate equal to the annual distribution
rate of such Trust Securities and having certain redemption terms which
correspond to the redemption terms for the Trust Securities. The Senior
Debentures will rank on an equal basis with all other unsecured debt of CMS
Energy except subordinated debt. The Subordinated Debentures will rank
subordinate in right of payment to all of CMS Energy's Senior Indebtedness (as
defined herein).

                                        6
<PAGE>   42

Distributions on the Trust Securities may not be made unless the Trust receives
corresponding interest payments on the Senior Debentures or the Subordinated
Debentures from CMS Energy. CMS Energy will irrevocably guarantee, on a senior
or subordinated basis, as applicable, and to the extent set forth therein, with
respect to each of the Trust Securities, the payment of distributions, the
redemption price, including all accrued or deferred and unpaid distributions,
and payment on liquidation, but only to the extent of funds on hand. Each
Guarantee will be unsecured and will be either equal to or subordinate to, as
applicable, all Senior Indebtedness, of CMS Energy. Upon the occurrence of
certain events (subject to the conditions to be described in an accompanying
prospectus supplement) the Trust may be liquidated and the holders of the Trust
Securities could receive Senior Debentures or Subordinated Debentures in lieu of
any liquidating cash distribution.

     Pursuant to the Trust Agreement, the number of CMS Trustees will initially
be three. Two of the CMS Trustees (the "ADMINISTRATIVE TRUSTEES") will be
persons who are employees or officers of or who are affiliated with CMS Energy.
The third trustee will be a financial institution that is unaffiliated with CMS
Energy, which trustee will serve as property trustee under the Trust Agreement
and as indenture trustee for the purposes of compliance with the provisions of
the Trust Indenture Act (the "PROPERTY TRUSTEE"). Initially, either The Bank of
New York, a New York banking corporation, or NBD Bank, a Michigan banking
corporation, will be the Property Trustee until removed or replaced by the
holder of the Common Securities. For the purpose of compliance with the
provisions of the Trust Indenture Act, The Bank of New York or NBD Bank will
also act as trustee (each a "GUARANTEE TRUSTEE" and collectively the "GUARANTEE
TRUSTEES"). The Bank of New York (Delaware) will act as the Delaware Trustee for
the purposes of the Trust Act, until removed or replaced by the holder of the
Common Securities. See "Description of Securities -- The Guarantees."

     Each Property Trustee will hold title to the applicable Debt Securities for
the benefit of the holders of the Trust Securities and each Property Trustee
will have the power to exercise all rights, powers and privileges under the
applicable indentures (as defined herein) as the holder of the Debt Securities.
In addition, each Property Trustee will maintain exclusive control of a
segregated non-interest bearing bank account (the "PROPERTY ACCOUNT") to hold
all payments made in respect of the Debt Securities for the benefit of the
holders of the Trust Securities. Each Property Trustee will make payments of
distributions and payments on liquidation, redemption and otherwise to the
holders of the Trust Securities out of funds from the Property Account. The
Guarantee Trustees will hold the Guarantees for the benefit of the holders of
the Trust Securities. CMS Energy, as the direct or indirect holder of all the
Common Securities, will have the right to appoint, remove or replace any CMS
Trustee and to increase or decrease the number of CMS Trustees; provided, that
the number of CMS Trustees shall be at least three, a majority of which shall be
Administrative Trustees. CMS Energy will pay all fees and expenses related to
the Trusts and the offering of the Trust Securities.

     The rights of the holders of the Trust Preferred Securities, including
economic rights, rights to information and voting rights, are set forth in the
Trust Agreement, the Trust Act and the Trust Indenture Act.

     The trustee in the State of Delaware is The Bank of New York (Delaware),
White Clay Center, Route 273, Newark, Delaware 19711.

                                        7
<PAGE>   43

     The principal place of business of each Trust shall be c/o CMS Energy
Corporation, Fairlane Plaza South, 330 Town Center Drive, Suite 1100, Dearborn,
Michigan 48126-2712.

                                USE OF PROCEEDS

     The proceeds received by each of the Trusts from the sale of its Trust
Preferred Securities or the Common Securities will be invested in the Senior
Debentures or the Subordinated Debentures. As will be more specifically set
forth in the applicable prospectus supplement, CMS Energy will use such borrowed
amounts and the net proceeds from the sale of CMS Energy Common Stock, Class G
Common Stock, Stock Purchase Contracts, Stock Purchase Units and any Senior
Debentures or Subordinated Debentures offered hereby for its general corporate
purposes, including capital expenditures, investment in subsidiaries, working
capital and repayment of debt.

                     RATIO OF EARNINGS TO FIXED CHARGES AND
        RATIO OF EARNINGS TO FIXED CHARGES AND PREFERRED STOCK DIVIDENDS

     The ratios of earnings to fixed charges and the ratios of earnings to fixed
charges and preferred stock dividends for each of the years ended December 31,
1993 through 1998, are as follows:

<TABLE>
<CAPTION>
                                                          YEAR ENDED DECEMBER 31,
                                                --------------------------------------------
                                                1998    1997    1996    1995    1994    1993
                                                ----    ----    ----    ----    ----    ----
<S>                                             <C>     <C>     <C>     <C>     <C>     <C>
Ratio of earnings to fixed charges..........    1.59    1.78    1.96    1.90    2.07    1.75
Ratio of earnings to fixed charges and
  preferred stock dividends.................    1.43    1.59    1.75    1.74    1.88    1.68
</TABLE>

     For the purpose of computing such ratios, earnings represent net income
before income taxes, net interest charges and the estimated interest portion of
lease rentals.

                                        8
<PAGE>   44

                           DESCRIPTION OF SECURITIES

INTRODUCTION

     Specific terms of the shares of Common Stock, par value $.01 per share
("CMS ENERGY COMMON STOCK"), shares of Class G Common Stock, no par value
("CLASS G COMMON STOCK"), unsecured senior debt securities (the "SENIOR
DEBENTURES") and unsecured subordinated debt securities (the "SUBORDINATED
DEBENTURES") (individually a "DEBT SECURITY" and collectively the "DEBT
SECURITIES") consisting of debentures, convertible debentures, notes and other
unsecured evidence of indebtedness, Stock Purchase Contracts (the "STOCK
PURCHASE CONTRACTS") to purchase CMS Energy Common Stock, Stock Purchase Units
(the "STOCK PURCHASE UNITS"), each representing ownership of a Stock Purchase
Contract and Debt Securities, or Trust Preferred Securities or debt obligations
of third parties, including U.S. Treasury Securities, securing the holder's
obligation to purchase the CMS Energy Common Stock under the Stock Purchase
Contract, or any combination of the foregoing, irrevocable guarantees
(individually a "GUARANTEE" and collectively "GUARANTEES") of CMS Energy, on a
senior or subordinated basis as applicable, and to the extent set forth therein,
with respect to each of the Trust Securities, the payment of distributions, the
redemption price, including all accrued or deferred and unpaid distributions,
and payment on liquidation, but only to the extent of fund on hand, and trust
preferred securities (the "TRUST PREFERRED SECURITIES") representing preferred
undivided beneficial interests in the assets of the Trust, in respect of which
this prospectus is being delivered (collectively, the "OFFERED SECURITIES"),
will be set forth in an accompanying prospectus supplement or supplements,
together with the terms of the offering of the Offered Securities, the initial
price thereof and the net proceeds from the sale thereof. The prospectus
supplement will set forth with regard to the particular Offered Securities,
without limitation, the following: (i) in the case of Debt Securities, the
designation, aggregate principal amount, denomination, maturity, premium, if
any, any exchange, conversion, redemption or sinking fund provisions, interest
rate (which may be fixed or variable), the time or method of calculating
interest payments, the right of CMS Energy, if any, to defer payment or interest
on the Debt Securities and the maximum length of such deferral, put options, if
any, public offering price, ranking, any listing on a securities exchange and
other specific terms of the offering; (ii) in the case of CMS Energy Common
Stock or Class G Common Stock, the designation, number of shares, public
offering price and other specific terms of the Offering, from the sale thereof;
(iii) in the case of Trust Preferred Securities, the designation, number of
shares, liquidation preference per security, initial public offering price, any
listing on a securities exchange, dividend rate (or method of calculation
thereof), dates on which dividends shall be payable and dates from which
dividends shall accrue, any voting rights, any redemption, exchange, conversion
or sinking fund provisions and any other rights, preferences, privileges,
limitations or restrictions relating to a specific series of the Trust Preferred
Securities including a description of the Guarantee (as defined herein), as the
case may be; and (iv) in the case of Stock Purchase Units, the specific terms of
the Stock Purchase Contracts and any Debt Securities, Trust Preferred
Securities, or debt obligations of third parties securing the holders obligation
to purchase CMS Energy Common Stock and Class G Common Stock under the Stock
Purchase Contracts, and the terms of the offering and sale thereof.

CAPITAL STOCK

     The following summary of certain rights of the holders of CMS Energy
capital stock does not purport to be complete and is qualified in its entirety
by express reference to the

                                        9
<PAGE>   45

Restated Articles of Incorporation of CMS Energy (the "ARTICLES OF
INCORPORATION") and the By-Laws of CMS Energy, copies of which are filed as
exhibits to the Registration Statement of which this prospectus is a part, and
by express reference to the Registration Statement on Form 8-B/A, which is
incorporated into this prospectus by reference. See "Incorporation of Certain
Documents by Reference" herein.

     The authorized capital stock of CMS Energy consists of 250 million shares
of CMS Energy Common Stock, 60 million shares of Class G Common, and 10 million
shares of CMS Energy Preferred Stock, $.01 par value ("PREFERRED STOCK"). The
CMS Energy Common Stock and the Class G Common Stock are sometimes together
referred to herein as the "Common Stock."

COMMON STOCK

     The Class G Common Stock is intended to reflect the separate performance of
the gas distribution, storage and transportation businesses conducted by
Consumers and Michigan Gas Storage, a subsidiary of Consumers (such businesses,
collectively, have been attributed to the "CONSUMERS GAS GROUP"). The CMS Energy
Common Stock is intended to reflect the performance of all businesses of CMS
Energy and its subsidiaries, including the businesses of the Consumers Gas
Group, except for the interest in the Consumers Gas Group attributable to the
outstanding shares of Class G Common Stock.

DIVIDEND RIGHTS AND POLICY; RESTRICTIONS ON DIVIDENDS

     Dividends on the CMS Energy Common Stock are paid at the discretion of the
Board of Directors based primarily upon the earnings and financial condition of
CMS Energy, including the Consumers Gas Group, except for the interest in the
Consumers Gas Group attributable to the outstanding shares of the Class G Common
Stock, and other factors. Dividends are payable out of the assets of CMS Energy
legally available therefore, including the Available Class G Dividend Amount (as
defined in the Articles of Incorporation).

     Dividends on the Class G Common Stock are paid at the discretion of the
Board of Directors based primarily upon the earnings and financial condition of
the Consumers Gas Group, and, to a lesser extent, CMS Energy as a whole.
Dividends are payable out of the lesser of (i) the assets of CMS Energy legally
available therefor and (ii) the Available Class G Dividend Amount. Although the
Available Class G Dividend Amount is intended to reflect the amount available
for dividends to holders of outstanding Class G Common Stock, it is also legally
available for dividends to holders of CMS Energy Common Stock.

     CMS Energy, in the sole discretion of its Board of Directors could pay
dividends exclusively to the holders of CMS Energy Common Stock, exclusively to
the holders of Class G Common Stock, or to the holders of both of such classes
in equal or unequal amounts.

     CMS Energy is a holding company and its assets consist primarily of
investments in its subsidiaries. As a holding company with no significant
operations of its own, the principal sources of its funds are dependent
primarily upon the earnings of its subsidiaries (in particular, Consumers),
borrowings and sales of equity. CMS Energy's ability to pay dividends, including
dividends on CMS Energy Common Stock and Class G Common Stock, is dependent
primarily upon the earnings and cash flows of its subsidiaries and the
distribution or other payment of such earnings to CMS Energy in the form of
dividends,

                                       10
<PAGE>   46

loans or advances and repayment of loans and advances from CMS Energy.
Accordingly, the ability of CMS Energy to pay dividends on its capital stock
will depend on the earnings, financial requirements, contractual restrictions of
the subsidiaries of CMS Energy, in particular, Consumers, and other factors. CMS
Energy's subsidiaries are separate and distinct legal entities and have no
obligation, contingent or otherwise, to pay any amounts on the capital stock of
CMS Energy or to make any funds available therefor, whether by dividends, loans
or other payments.

     Dividends on capital stock of CMS Energy are limited by Michigan law to
legally available assets of CMS Energy. Distributions on Common Stock may be
subject to the rights of the holders, if any, of the CMS Energy Preferred Stock.

     There are restrictions on CMS Energy's ability to pay dividends contained
in certain revolving credit and term loan agreements, the indenture dated as of
September 15, 1992, as amended and supplemented, between CMS Energy and NBD
Bank, as Trustee, and the indenture dated as of January 15, 1994, as amended and
supplemented, between CMS Energy and The Chase Manhattan Bank, as Trustee. A
discussion of specific restrictions on CMS Energy's ability to pay dividends
will be set forth in an accompanying prospectus supplement pursuant to which
convertible Senior Debentures, Subordinated Debentures, convertible Trust
Preferred Securities, Stock Purchase Contracts, Stock Purchase Units, CMS Energy
Common Stock or Class G Common Stock are offered.

VOTING RIGHTS

     The holders of CMS Energy Common Stock vote with the holders of Class G
Common Stock as a single class, except on matters which would be required by law
or the Articles of Incorporation to be voted on by class. Each holder of Common
Stock is entitled to one vote for each share of Common Stock held by such holder
on each matter voted upon by the shareholders. Such right to vote is not
cumulative. A majority of the votes cast by the holders of shares entitled to
vote thereon is sufficient for the adoption of any question presented, except
that certain provisions of the Articles of Incorporation relating to special
shareholder meetings, the removal, indemnification and liability of the Board of
Directors and the requirements for amending these provisions may not be amended,
altered, changed or repealed unless such amendment, alteration, change or repeal
is approved by the affirmative vote of at least 75% of the outstanding shares
entitled to vote thereon.

     Under Michigan law, the approval of the holders of a majority of the
outstanding shares of a class of Common Stock, voting as a separate class, would
be necessary for authorizing, effecting or validating the merger or
consolidation of CMS Energy into or with any other corporation if such merger or
consolidation would adversely affect the powers or special rights of such class
of stock, and to authorize any amendment to the Articles of Incorporation that
would increase or decrease the aggregate number of authorized shares of such
class (except pursuant to Section 303 of the Michigan Business Corporation Act,
which, under certain circumstances, would enable the Board of Directors to
increase the number of authorized shares to satisfy the exchange features of the
Common Stock described below) or alter or change the powers, preferences or
special rights of the shares of such class so as to affect them adversely. The
Articles of Incorporation also provide that unless the vote or consent of a
greater number of shares shall then be required by law, the vote or consent of
the holders of a majority of all the shares of either class of Common Stock then
outstanding, voting as a separate class, will be necessary for authorizing,
effecting or validating the merger or consolidation of CMS Energy into or with
any other

                                       11
<PAGE>   47

entity if such merger or consolidation would adversely affect the powers or
special rights of such class of Common Stock, either directly by amendment to
the Articles of Incorporation or indirectly by requiring the holders of such
class to accept or retain, in such merger or consolidation, anything other than
(i) shares of such class or (ii) shares of the surviving or resulting
corporation, having, in either case, powers and special rights identical to
those of such class prior to such merger or consolidation. The effect of these
provisions may be to permit the holders of a majority of the outstanding shares
of either class of Common Stock to block any such merger or amendment which
would adversely affect the powers or special rights of holders of such class of
Common Stock.

PREEMPTIVE RIGHTS

     The Articles of Incorporation provide that holders of Common Stock will
have no preemptive rights to subscribe for or purchase any additional shares of
the capital stock of CMS Energy of any class now or hereafter authorized, or
Preferred Stock, bonds, debentures, or other obligations or rights or options
convertible into or exchangeable for or entitling the holder or owner to
subscribe for or purchase any shares of capital stock, or any rights to exchange
shares issued for shares to be issued.

LIQUIDATION RIGHTS

     In the event of the dissolution, liquidation or winding up of CMS Energy,
whether voluntary or involuntary, after payment or provision for payment of the
debts and other liabilities of CMS Energy and after there shall have been paid
or set apart for the holders of Preferred Stock the full preferential amounts
(including any accumulated and unpaid dividends) to which they are entitled, the
holders of CMS Energy Common Stock and Class G Common Stock shall be entitled to
receive, on a per share basis, the same portion of all of the assets of CMS
Energy remaining for distribution to the holders of Common Stock, regardless of
whether or not any of such assets were attributed to the Consumers Gas Group.
Neither the merger or consolidation of CMS Energy into or with any other
corporation, nor the merger or consolidation of any other corporation into or
with CMS Energy nor any sale, transfer or lease of all or any part of the assets
of CMS Energy, shall be deemed to be a dissolution, liquidation or winding up
for the purposes of this provision.

     Because CMS Energy has subsidiaries which have debt obligations and other
liabilities of their own, CMS Energy's rights and the rights of its creditors
and its stockholders to participate in the distribution of assets of any
subsidiary upon the latter's liquidation or recapitalization will be subject to
prior claims of the subsidiary's creditors, except to the extent that CMS Energy
may itself be a creditor with recognized claims against the subsidiary.

SUBDIVISION OR COMBINATION

     If CMS Energy subdivides (by stock split, stock dividend or otherwise) or
combines (by reverse stock split or otherwise) the outstanding shares of either
Class G Common Stock or CMS Energy Common Stock, the voting and liquidation
rights of shares of CMS Energy Common Stock relative to Class G Common Stock
will be appropriately adjusted so as to avoid any dilution in aggregate voting
or liquidation rights of either class of Common Stock. For example, in case CMS
Energy were to effect a two-for-one split of Class G Common Stock, the per share
liquidation rights of CMS Energy Common Stock would be multiplied by two in
order to avoid dilution in the aggregate liquidation rights of

                                       12
<PAGE>   48

holders of CMS Energy Common Stock and each post-split share of Class G Common
Stock would have one-half of a vote on matters voted upon by the Shareholders.

EXCHANGES

     The Articles of Incorporation do not provide for either the mandatory or
optional exchange or redemption of CMS Energy Common Stock but do provide that
Class G Common Stock may be exchanged for CMS Energy Common Stock as described
in the Registration Statement on Form 8-B/A incorporated by reference herein.
CMS Energy cannot predict the impact of the potential for such exchanges on the
market prices of CMS Energy Common Stock.

     CMS Energy may exchange the Class G Common Stock for a proportionate number
of shares of a subsidiary that holds all the assets and liabilities attributed
to the Consumers Gas Group, and no other assets and liabilities. If CMS Energy
transfers all or substantially all of the properties and assets attributed to
the Consumers Gas Group, CMS Energy is required, subject to certain exceptions
and conditions, to exchange each outstanding share of Class G Common Stock for a
number of shares of CMS Energy Common Stock having a Fair Market Value (defined
in the Articles of Incorporation) equal to 110% of the Fair Market Value of one
share of Class G Common Stock.

     CMS Energy may, in the sole discretion of the Board of Directors, at any
time, exchange each outstanding share of Class G Common Stock for a number of
shares of CMS Energy Common Stock having a Fair Market Value equal to 115% of
the Fair Market Value of one share of Class G Common Stock.

     CMS Energy cannot predict the impact of the potential for such exchanges on
the market prices of the CMS Energy Common Stock.

TRANSFER AGENT AND REGISTRAR

     CMS Energy Common Stock and Class G Common Stock are transferable at
Consumers Energy Company, 212 W. Michigan Avenue, Jackson, MI 49201. CMS Energy
is the registrar and transfer agent for CMS Energy Common Stock and Class G
Common Stock.

PREFERRED STOCK

     The authorized Preferred Stock may be issued without the approval of the
holders of Common Stock in one or more series, from time to time, with each such
series to have such designation, powers, preferences and relative,
participating, optional or other special rights, voting rights, if any, and
qualifications, limitations or restrictions thereof, as shall be stated in a
resolution providing for the issue of any such series adopted by CMS Energy's
Board of Directors. The Articles of Incorporation provide that holders of
Preferred Stock will not have any preemptive rights to subscribe for or purchase
any additional shares of the capital stock of CMS Energy of any class now or
hereafter authorized, or any Preferred Stock, bonds, debentures or other
obligations or rights or options convertible into or exchangeable for or
entitling the holder or owner to subscribe for or purchase any shares of capital
stock. The future issuance of Preferred Stock may have the effect of delaying,
deterring or preventing a change in control of CMS Energy.

                                       13
<PAGE>   49

PRIMARY SOURCE OF FUNDS OF CMS ENERGY; RESTRICTIONS ON SOURCES OF DIVIDENDS

     The ability of CMS Energy to pay (i) dividends on its capital stock and
(ii) its indebtedness, including the Debt Securities, depends and will depend
substantially upon timely receipt of sufficient dividends or other distributions
from its subsidiaries, in particular Consumers. Consumers' ability to pay
dividends on its common stock depends upon its revenues, earnings and other
factors. Consumers' revenues and earnings will depend substantially upon rates
authorized by the MPSC.

     Consumers' ability to pay dividends is restricted by its First Mortgage
Bond Indenture (the "MORTGAGE INDENTURE") and its Articles of Incorporation
("ARTICLES"). The Mortgage Indenture provides that Consumers can only pay
dividends on its common stock out of retained earnings accumulated subsequent to
September 30, 1945, provided that upon such payment, there shall remain of such
retained earnings an amount equivalent to any deficiency in maintenance and
replacement expenditures as compared with maintenance and replacement
requirements since December 31, 1945. Because of restrictions in its Articles
and Mortgage Indenture, Consumers was prohibited from paying dividends on its
common stock from June 1991 to December 31, 1992. However, as of December 31,
1992, Consumers effected a quasi-reorganization in which Consumers' accumulated
deficit of $574 million was eliminated against other paid-in capital. With the
accumulated deficit eliminated, Consumers satisfied the requirements under its
Mortgage Indenture and resumed paying dividends on its common stock in May 1993.

     Consumers' Articles also provide two restrictions on its payment of
dividends on its common stock. First, prior to the payment of any common stock
dividend, Consumers must reserve retained earnings after giving effect to such
dividend payment of at least (i) $7.50 per share on all then outstanding shares
of its preferred stock, (ii) in respect to its Class A Preferred Stock, 7.5% of
the aggregate amount established by its Board of Directors to be payable on the
shares of each series thereof in the event of involuntary liquidation of
Consumers, and (iii) $7.50 per share on all then outstanding shares of all other
stock over which its preferred stock and Class A Preferred Stock do not have
preference as to the payment of dividends and as to assets. Second, dividend
payments during the 12 month period ending with the month the proposed payment
is to be paid are limited to: (i) 50% of net income available for the payment of
dividends during the base period (hereinafter defined) if the ratio of common
stock and surplus to total capitalization and surplus for 12 consecutive
calendar months within the 14 calendar months immediately preceding the proposed
dividend payment (the "BASE PERIOD"), adjusted to reflect the proposed dividend,
is less than 20%; and (ii) 75% of net income available for the payment of
dividends during the base period if the ratio of common stock and surplus to
total capitalization and surplus for the base period, adjusted to reflect the
proposed dividend, is at least 20% but less than 25%.

     In addition, Consumers' Indenture dated January 1, 1996, between Consumers
and Bank of New York as Trustee ("INDENTURE"), and certain Preferred Securities
Guarantees by Consumers dated January 23, 1996 and September 11, 1997
(collectively the "CONSUMERS PREFERRED SECURITIES GUARANTEES"), in connection
with which the 8.36% Trust Preferred Securities of Consumers Power Company
Financing 1 and the 8.20% Trust Securities of Consumers Energy Financing II
(collectively the "CONSUMERS TRUST PREFERRED SECURITIES") were issued, provide
that Consumers shall not declare or pay any dividend on, make any distributions
with respect to, or redeem, purchase or make a liquidation payment with respect
to, any of its capital stock if: (i) there shall have occurred any event that
would constitute an event of default under the Indenture or the

                                       14
<PAGE>   50

trust agreements pursuant to which the Consumers Trust Preferred Securities were
issued, (ii) a default with respect to its payment of any obligations under the
Consumers Preferred Securities Guarantees or certain Consumers common stock
guarantees, or (iii) it gives notice of its election to extend the interest
payment period on the subordinated notes issued under the Indenture, at any time
for up to 20 consecutive quarters provided, however, Consumers may declare and
pay stock dividends where the dividend stock is the same stock as that on which
the dividend is being paid.

     Consumers' Articles also prohibit the payment of cash dividends on its
common stock if Consumers is in arrears on preferred stock dividend payments.

     In addition, Michigan law prohibits payment of a dividend if, after giving
it effect, Consumers would not be able to pay its debts as they become due in
the usual course of business, or its total assets would be less than the sum of
its total liabilities plus, unless the articles permit otherwise, the amount
that would be needed, if Consumers were to be dissolved at the time of the
distribution, to satisfy the preferential rights upon dissolution of
shareholders whose preferential rights are superior to those receiving the
distribution. Currently, it is Consumers' policy to pay annual dividends equal
to 80% of its annual consolidated net income. Consumers' Board of Directors
reserves the right to change this policy at any time.

DEBT SECURITIES

     The Debt Securities offered by this prospectus will be unsecured
obligations of CMS Energy and will be either senior or subordinated debt. Senior
Debentures will be issued under a senior debt indenture and Subordinated
Debentures will be issued under a subordinated debt indenture. The senior debt
indenture and the subordinated debt indenture are sometimes referred to in this
prospectus individually as an "INDENTURE" and collectively as the "INDENTURES."

     The following briefly summarizes the material provisions of the indentures
and the Debt Securities. You should read the more detailed provisions of the
applicable indenture, including the defined terms, for provisions that may be
important to you. You should also read the particular terms of a series of Debt
Securities, which will be described in more detail in the applicable prospectus
supplement. Copies of the indentures may be obtained from CMS Energy or the
applicable trustee.

     Unless otherwise provided in the applicable prospectus supplement, the
trustee under the senior debt indenture will be NBD Bank and the trustee under
the subordinated debt indenture will be The Bank of New York.

GENERAL

     The indentures provide that Debt Securities of CMS Energy may be issued in
one or more series, with different terms, in each case as authorized from time
to time by CMS Energy.

     Federal income tax consequences and other special considerations applicable
to any Debt Securities issued by CMS Energy at a discount will be described in
the applicable prospectus supplement.

     Because CMS Energy is a holding company, the claims of creditors of CMS
Energy's subsidiaries will have a priority over CMS Energy's equity rights and
the rights of CMS

                                       15
<PAGE>   51

Energy's creditors, including the holders of Debt Securities, to participate in
the assets of the subsidiary upon the subsidiary's liquidation.

     The applicable prospectus supplement relating to any series of Debt
Securities will describe the following terms, where applicable:

     - the title of the Debt Securities;

     - whether the Debt Securities will be senior or subordinated debt;

     - the total principal amount of the Debt Securities;

     - the percentage of the principal amount at which the Debt Securities will
       be sold and, if applicable, the method of determining the price;

     - the maturity date or dates;

     - the interest rate or the method of computing the interest rate;

     - the date or dates from which any interest will accrue, or how such date
       or dates will be determined, and the interest payment date or dates and
       any related record dates;

     - the location where payments on the Debt Securities will be made;

     - the terms and conditions on which the Debt Securities may be redeemed at
       the option of CMS Energy;

     - any obligation of CMS Energy to redeem, purchase or repay the Debt
       Securities at the option of a holder upon the happening of any event and
       the terms and conditions of redemption, purchase or repayment;

     - any provisions for the discharge of CMS Energy's obligations relating to
       the Debt Securities by deposit of funds or United States government
       obligations;

     - whether the Debt Securities are to trade in book-entry form and the terms
       and any conditions for exchanging the global security in whole or in part
       for paper certificates;

     - any material provisions of the applicable indenture described in this
       prospectus that do not apply to the Debt Securities;

     - any additional amounts with respect to the Debt Securities that CMS
       Energy will pay to a non-United States person because of any tax,
       assessment or governmental charge withheld or deducted and, if so, any
       option of CMS Energy to redeem the Debt Securities rather than paying
       these additional amounts; and

     - any other specific terms of the Debt Securities.

CONCERNING THE TRUSTEES

     Each of NBD Bank, the trustee under the senior debt indenture, and The Bank
of New York, the trustee under the subordinated debt indenture, is one of a
number of banks with which CMS Energy and its subsidiaries maintain ordinary
banking relationships, including credit facilities.

                                       16
<PAGE>   52

EXCHANGE AND TRANSFER

     Debt Securities may be presented for exchange and registered Debt
Securities may be presented for registration of transfer at the offices and
subject to the restrictions set forth therein and in the applicable prospectus
supplement without service charge, but upon payment of any taxes or other
governmental charges due in connection therewith, subject to any limitations
contained in the applicable indenture. Debt Securities in bearer form and the
coupons appertaining thereto, if any, will be transferable by delivery.

PAYMENT

     Distributions on the Debt Securities in registered form will be made at the
office or agency of the applicable trustee in the Borough of Manhattan, the City
of New York or its other designated office. However, at the option of CMS
Energy, payment of any interest may be made by check or by wire transfer.
Payment of any interest due on Debt Securities in registered form will be made
to the persons in whose name the Debt Securities are registered at the close of
business on the record date for such interest payments. Payments made in any
other manner will be specified in the prospectus supplement.

EVENTS OF DEFAULT

     Each indenture provides that events of default regarding any series of Debt
Securities will be:

     - failure to pay required interest on any Debt Security of such series for
       30 days;

     - failure to pay principal other than a scheduled installment payment or
       premium, if any, on any Debt Security of such series when due;

     - failure to make any required scheduled installment payment for 30 days on
       Debt Securities of such series;

     - failure to perform for 90 days after notice any other covenant in the
       relevant indenture other than a covenant included in the relevant
       indenture solely for the benefit of a series of Debt Securities other
       than such series;

     - certain events of bankruptcy or insolvency, whether voluntary or not; or

     - entry of final judgments against CMS Energy or Consumers for more than
       $25,000,000 which remain undischarged or unbonded for 60 days or a
       default resulting in the acceleration of indebtedness of CMS Energy or
       Consumers more than $25,000,000, and the acceleration has not been
       rescinded or annulled within 10 days after written notice of such default
       as provided in the applicable indenture; and

     Additional events of default may be prescribed for the benefit of the
holders of a particular series of Debt Securities and will be described in the
prospectus supplement relating to those Debt Securities.

     If an event of default regarding Debt Securities of any series issued under
the indentures should occur and be continuing, either the trustee or the holders
of 25% in the principal amount of outstanding Debt Securities of such series may
declare each Debt Security of that series due and payable.

     Holders of a majority in principal amount of the outstanding Debt
Securities of any series will be entitled to control certain actions of the
trustee under the indentures and to

                                       17
<PAGE>   53

waive past defaults regarding such series. The trustee generally will not be
requested, ordered or directed by any of the holders of Debt Securities, unless
one or more of such holders shall have offered to the trustee reasonable
security or indemnity.

     Before any holder of any series of Debt Securities may institute action for
any remedy, except payment on such holder's Debt Security when due, the holders
of not less than 25% in principal amount of the Debt Securities of that series
outstanding must request the trustee to take action. Holders must also offer and
give the satisfactory security and indemnity against liabilities incurred by the
trustee for taking such action.

     CMS Energy is required to annually furnish the relevant trustee a statement
as to CMS Energy's compliance with all conditions and covenants under the
applicable indenture. Each indenture provides that the relevant trustee may
withhold notice to the holders of the Debt Securities of any series of any
default affecting such series, except payment on holders' Debt Securities when
due, if it considers withholding notice to be in the interests of the holders of
the Debt Securities of such series.

CONSOLIDATION, MERGER OR SALE OF ASSETS

     Each indenture provides that CMS Energy may consolidate with or merge into,
or sell, lease or convey its property as an entirety or substantially as an
entirety to, any other corporation if the new corporation assumes the
obligations of CMS Energy under the Debt Securities and the indentures and is
organized and existing under the laws of the United States of America, any U.S.
state or the District of Columbia.

MODIFICATION OF THE INDENTURE

     Each indenture permits CMS Energy and the relevant trustee to enter into
supplemental indentures without the consent of the holders of the Debt
Securities to establish the form and terms of any series of securities under the
indentures.

     Each indenture also permits CMS Energy and the relevant trustee, with the
consent of the holders of at least a majority in total principal amount of the
Debt Securities of all series then outstanding and affected (voting as one
class), to change in any manner the provisions of the applicable indenture or
modify in any manner the rights of the holders of the Debt Securities of each
such affected series. CMS Energy and the relevant trustee may not, without the
consent of the holder of each Debt Security affected, enter into any
supplemental indenture to:

     - change the time of payment of the principal;

     - reduce the principal amount of such Debt Security;

     - reduce the rate or change the time of payment of interest on such Debt
       Security;

     - reduce the amount payable on any securities issued originally at a
       discount upon acceleration or provable in bankruptcy; or

     - impair the right to institute suit for the enforcement of any payment on
       any Debt Security when due.

     In addition, no such modification may reduce the percentage in principal
amount of the Debt Securities of the affected series, the consent of whose
holders is required for any such modification or for any waiver provided for in
the applicable indenture.

                                       18
<PAGE>   54

     Prior to the acceleration of the maturity of any Debt Security, the
holders, voting as one class, of a majority in total principal amount of the
Debt Securities with respect to which a default or event of default shall have
occurred and be continuing may on behalf of the holders of all such affected
Debt Securities waive any past default or event of default and its consequences,
except a default or an event of default in respect of a covenant or provision of
the applicable indenture or of any Debt Security which cannot be modified or
amended without the consent of the holder of each Debt Security affected.

DEFEASANCE, COVENANT DEFEASANCE AND DISCHARGE

     Each indenture provides that, at the option of CMS Energy:

     - CMS Energy will be discharged from all obligations in respect of the Debt
       Securities of a particular series then outstanding (except for certain
       obligations to register the transfer of or exchange the Debt Securities
       of such series, to replace stolen, lost or mutilated Debt Securities of
       such series, to maintain paying agencies and to maintain the trust
       described below); or

     - CMS Energy need not comply with certain restrictive covenants of the
       relevant indenture (including those described under "Consolidation,
       Merger or Sale of Assets").

     If CMS Energy in each case irrevocably deposits in trust with the relevant
trustee money, and/or securities backed by the full faith and credit of the
United States which, through the payment of the principal thereof and the
interest thereon in accordance with their terms, will provide money in an amount
sufficient to pay all the principal and interest on the Debt Securities of such
series on the stated maturities of such Debt Securities in accordance with the
terms thereof.

     To exercise this option, CMS Energy is required to deliver to the relevant
trustee an opinion of independent counsel to the effect that:

     - the exercise of such option would not cause the holders of the Debt
       Securities of such series to recognize income, gain or loss for United
       States federal income tax purposes as a result of such defeasance, and
       such holders will be subject to United States federal income tax on the
       same amounts, in the same manner and at the same times as would have been
       the case if such defeasance had not occurred; and

     - in the case of a discharge as described above, such opinion is to be
       accompanied by a private letter ruling to the same effect received from
       the Internal Revenue Service, a revenue ruling to such effect pertaining
       to a comparable form of transaction published by the Internal Revenue
       Service or appropriate evidence that since the date of the applicable
       indenture there has been a change in the applicable federal income tax
       law.

     In the event:

     - CMS Energy exercises its option to effect a covenant defeasance with
       respect to the Debt Securities of any series as described above,

     - the Debt Securities of such series are thereafter declared due and
       payable because of the occurrence of any event of default other than an
       event of default caused by failing to comply with the covenants which are
       defeased,

     - the amount of money and securities on deposit with the relevant trustee
       would be insufficient to pay amounts due on the Debt Securities of such
       series at the time of the acceleration resulting from such event of
       default,

                                       19
<PAGE>   55

     CMS Energy would remain liable for such amounts.

GOVERNING LAW

     Each indenture and the Debt Securities will be governed by, and construed
in accordance with, the laws of the State of Michigan unless the laws of another
jurisdiction shall mandatorily apply.

SENIOR DEBENTURES

     The Senior Debentures will be issued under the senior debt indenture and
will rank on an equal basis with all other unsecured debt of CMS Energy except
subordinated debt.

SUBORDINATED DEBENTURES

     The Subordinated Debentures will be issued under the subordinated debt
indenture and will rank subordinated and junior in right of payment, to the
extent set forth in the subordinated debt indenture, to all "SENIOR
INDEBTEDNESS" (as defined below) of CMS Energy.

     If CMS Energy defaults in the payment of any distributions on any Senior
Indebtedness when it becomes due and payable after any applicable grace period,
then, unless and until the default is cured or waived or ceases to exist, CMS
Energy cannot make a payment on account of or redeem or otherwise acquire the
Subordinated Debentures. The subordinated debt indenture provisions described in
this paragraph, however, do not prevent CMS Energy from making sinking fund
payments in Subordinated Debentures acquired prior to the maturity of Senior
Indebtedness or, in the case of default, prior to such default and notice
thereof. If there is any insolvency, bankruptcy, liquidation or other similar
proceeding relating to CMS Energy, its creditors or its property, then all
Senior Indebtedness must be paid in full before any payment may be made to any
holders of Subordinated Debentures. Holders of Subordinated Debentures must
return and deliver any payments received by them, other than in a plan of
reorganization or through a defeasance trust as described above, directly to the
holders of Senior Indebtedness until all Senior Indebtedness is paid in full.

     "SENIOR INDEBTEDNESS" means distributions on the following, whether
outstanding on the date of execution of the subordinated debt indenture or
thereafter incurred, created or assumed:

     - indebtedness of CMS Energy for money borrowed by CMS Energy or evidenced
       by debentures (other than the Subordinated Debentures), notes, bankers'
       acceptances or other corporate debt securities or similar instruments
       issued by CMS Energy;

     - obligations of CMS Energy with respect to letters of credit;

     - all indebtedness of others of the type referred to in the two preceding
       clauses assumed by or guaranteed in any manner by CMS Energy or in effect
       guaranteed by CMS Energy; or

     - renewals, extensions or refundings of any of the indebtedness referred to
       in the preceding three clauses unless, in the case of any particular
       indebtedness, renewal, extension or refunding, under the express
       provisions of the instrument creating or evidencing the same or the
       assumption or guarantee of the same, or pursuant to which the same is
       outstanding, such indebtedness or such renewal, extension or

                                       20
<PAGE>   56

       refunding thereof is not superior in right of payment to the subordinated
       debt securities.

     The subordinated debt indenture does not limit the total amount of Senior
Indebtedness that may be issued. As of December 31, 1998, Senior Indebtedness of
CMS Energy totaled approximately $2.766 billion.

CERTAIN COVENANTS

     If Debt Securities are issued to a Trust or a trustee of such Trust in
connection with the issuance of Trust Preferred Securities by such Trust, CMS
Energy will covenant that it will not, and it will not cause any of its
subsidiaries to, (i) declare or pay any dividends or distributions on, or
redeem, purchase, acquire, or make a liquidation payment with respect to, any of
CMS Energy's capital stock or (ii) make any payment of principal, interest or
premium, if any, on or repay or repurchase or redeem any debt securities
(including guarantees of indebtedness for money borrowed) of CMS Energy that
rank pari passu (in the case of Subordinated Debentures) with or junior (in the
case of Senior and Subordinated Debentures) to that Debt Security (other than
(a) any dividend, redemption, liquidation, interest, principal or guarantee
payment by CMS Energy where the payment is made by way of securities (including
capital stock) that rank pari passu with or junior to the securities on which
such dividend, redemption, interest, principal or guarantee payment is being
made, (b) payments under the Guarantees, (c) purchases of CMS Energy Common
Stock related to the issuance of CMS Energy Common Stock under any of CMS
Energy's benefit plans for its directors, officers or employees, (d) as a result
of a reclassification of CMS Energy's capital stock or the exchange or
conversion of one series or class of CMS Energy's capital stock for another
series or class of CMS Energy's capital stock and (e) the purchase of fractional
interests in shares of CMS Energy's capital stock pursuant to the conversion or
exchange provisions of such capital stock or the security being converted or
exchanged) if at such time (i) there shall have occurred any event of which CMS
Energy has actual knowledge that (a) with the giving of notice or the lapse of
time, or both, would constitute an event of default under the indentures and (b)
in respect of which CMS Energy shall not have taken reasonable steps to cure,
(ii) CMS Energy shall be in default with respect to its payment of any
obligations under the Guarantees or (iii) CMS Energy shall have given notice of
its selection of an Extension Period as provided in the indentures with respect
to the Debt Securities and shall not have rescinded such notice, or such
Extension Period, or any extension thereof, shall be continuing. CMS Energy will
also covenant (i) for so long as Trust Preferred Securities are outstanding, not
to convert the Debt Securities except pursuant to a notice of conversion
delivered to the Conversion Agent (as defined in the indentures) by a holder of
Trust Preferred Securities, (ii) to maintain directly or indirectly 100%
ownership of the Common Securities, provided that certain successor which are
permitted pursuant to the indentures may succeed to CMS Energy's ownership of
the Common Securities, (iii) not to voluntarily terminate, wind-up or liquidate
such Trust, except (a) in connection with a distribution of the Debt Securities
to the holders of the Trust Preferred Securities in liquidation of such Trust or
(b) in connection with certain mergers, consolidations or amalgamations
permitted by the Trust Agreement, (iv) to maintain the reservation for issuance
of the number of shares of CMS Energy Common Stock that would be required from
time to time upon the conversion of all the Debt Securities then outstanding,
(v) to use its reasonable efforts, consistent with the terms and provisions of
the Trust Agreement, to cause such Trust to remain classified as a grantor trust
and not as an association taxable as a corporation for United States federal
income tax purposes and (vi) to deliver shares

                                       21
<PAGE>   57

of CMS Energy Common Stock upon an election by the holders of the Trust
Preferred Securities to convert such Trust Preferred Securities into CMS Energy
Common Stock.

     As part of the Guarantees, CMS Energy will agree that it will honor all
obligations described therein relating to the conversion or exchange of the
Trust Preferred Securities into or for CMS Energy Common Stock, Senior
Debentures or Subordinated Debentures.

CONVERSION RIGHTS

     If the prospectus supplement provides, the Holders of Debt Securities may
convert such Debt Securities into CMS Energy Common Stock, as defined herein
(see "Description of Securities -- Common Stock"), at the option of the Holders
at the principal amount thereof, or of such portion thereof, at any time during
the period specified in the prospectus supplement, at the conversion price or
conversion rate specified in the prospectus supplement; except that, with
respect to any Debt Securities (or portion thereof) called for redemption, such
conversion right shall terminate at the close of business on the fifteenth day
prior to the date fixed for redemption of such Debt Security, unless CMS Energy
shall default in payment of the amount due upon redemption thereof.

     The conversion privilege and conversion price or conversion rate will be
adjusted in certain events, including if CMS Energy:

     - pays a dividend or makes a distribution in shares of CMS Energy Common
       Stock;

     - subdivides its outstanding shares of CMS Energy Common Stock into a
       greater number of shares;

     - combines its outstanding shares of CMS Energy Common Stock into a smaller
       number of shares;

     - pays a dividend or makes a distribution on its CMS Energy Common Stock
       other than in shares of its CMS Energy Common Stock;

     - issues by reclassification of its shares of CMS Energy Common Stock any
       shares of its capital stock;

     - issues any rights or warrants to all holders of shares of its CMS Energy
       Common Stock entitling them (for a period expiring within 45 days, or
       such other period as may be specified in the prospectus supplement) to
       purchase shares of CMS Energy Common Stock (or Convertible Securities as
       defined in the indentures) at a price per share less than the Average
       Market Price (as defined in the indentures) per share for such CMS Energy
       Common Stock; and

     - distributes to all holders of shares of its CMS Energy Common Stock any
       assets or Debt Securities or any rights or warrants to purchase
       securities, provided that no adjustment shall be made under (vi) or (vii)
       above if the adjusted conversion price would be higher than, or the
       adjusted conversion rate would be less than, the conversion price or
       conversion rate, as the case may be, in effect prior to such adjustment.

     CMS Energy may reduce the conversion price or increase the conversion rate,
temporarily or otherwise, by any amount but in no event shall such adjusted
conversion price or conversion rate result in shares of CMS Energy Common Stock
being issuable upon conversion of the Debt Securities if converted at the time
of such adjustment at an

                                       22
<PAGE>   58

effective conversion price per share less than the par value of the CMS Energy
Common Stock at the time such adjustment is made. No adjustments in the
conversion price or conversion rate need be made unless the adjustment would
require an increase or decrease of at least one percent (1%) in the initial
conversion price or conversion rate. Any adjustment which is not made shall be
carried forward and taken into account in any subsequent adjustment. The
foregoing conversion provisions may be modified to the extent set forth in the
prospectus supplement.

TRUST PREFERRED SECURITIES

  GENERAL

     Each Trust may issue, from time to time, Trust Preferred Securities having
terms described in the prospectus supplement relating thereto. The Trust
Agreement of each Trust will authorize the establishment of no more than one
series of Trust Preferred Securities, having such terms, including
distributions, redemption, voting, liquidation rights and such other preferred,
deferred or other special rights or such rights or restrictions as shall be set
forth therein or otherwise established by the Trust Trustees pursuant thereto.
Reference is made to the prospectus supplement relating to the Trust Preferred
Securities for specific terms, including: (i) the distinctive designation and
the number of Trust Preferred Securities to be offered which will represent
undivided beneficial interests in the assets of the Trust; (ii) the annual
distribution rate and the dates or date upon which such distributions will be
paid, provided, however that distributions on the Trust Preferred Securities
will be paid quarterly in arrears to holders of Trust Preferred Securities as of
a record date on which the Trust Preferred Securities are outstanding; (iii)
whether holders can convert the Trust Preferred Securities into shares of CMS
Energy Common Stock; (iv) whether distributions on Trust Preferred Securities
would be deferred during any deferral of interest payments on the Debt
Securities, provided, however that no such deferral, including extensions, if
any, may exceed 20 consecutive quarters nor extend beyond the stated maturity
date of the Debt Securities, and at the end of any such deferrals, CMS Energy
shall make all interest payments then accrued or deferred and unpaid (including
any compounded interest); (v) the amount of any liquidation preference; (vi) the
obligation, if any, of the Trust to redeem Trust Preferred Securities through
the exercise of CMS Energy of an option on the corresponding Debt Securities and
the price or prices at which, the period or periods within which and the terms
and conditions upon which Trust Preferred Securities shall be purchased or
redeemed, in whole or in part, pursuant to such obligation; (vii) the period or
periods within which and the terms and conditions, if any, including the price
or prices or the rate or rates of conversion or exchange and the terms and
conditions of any adjustments thereof, upon which the Trust Preferred Securities
shall be convertible or exchangeable at the option of the holder of the Trust
Preferred Securities or other property or cash; (viii) the voting rights, if
any, of the Trust Preferred Securities in addition to those required by law and
in the Trust Agreement, or set forth under a Guarantee (as defined below); (ix)
the additional payments, if any, which the Trust will pay as a distribution as
necessary so that the net amounts reserved by the Trust and distributable to the
holders of the Trust Preferred Securities, after all taxes, duties, assessments
or governmental charges of whatever nature (other than withholding taxes) have
been paid will not be less than the amount that would have been reserved and
distributed by the Trust, and the amount the holders of the Trust Preferred
Securities would have reserved, had no such taxes, duties, assessments or
governmental charges been imposed; (x) the terms and conditions, if any, upon
which the Debt Securities may be distributed to holders of Trust Preferred
Securities; and (xi) any other relative rights,

                                       23
<PAGE>   59

powers, preferences, privileges, limitations or restrictions of the Trust
Preferred Securities not inconsistent with the Trust Agreement or applicable
law. All Trust Preferred Securities offered hereby will be irrevocably
guaranteed by CMS Energy, on a senior or subordinated basis, as applicable, and
to the extent set forth below under "The Guarantees." Any applicable federal
income tax considerations applicable to any offering of the Trust Preferred
Securities will be described in the prospectus supplement relating thereto. The
aggregate number of Trust Preferred Securities which the Trust shall have
authority to issue will be pursuant to the terms of the Trust Agreement.

                EFFECT OF OBLIGATIONS UNDER THE DEBT SECURITIES
                               AND THE GUARANTEES

     As set forth in the Trust Agreement, the sole purpose of the Trust is to
issue the Trust Securities evidencing undivided beneficial interests in the
assets of each of the Trust, and to invest the proceeds from such issuance and
sale to acquire directly the Debt Securities from CMS Energy.

     As long as payments of interest and other payments are made when due on the
Debt Securities, such payments will be sufficient to cover distributions and
payments due on the Trust Securities because of the following factors:

     - the aggregate principal amount of Debt Securities will be equal to the
       sums of the aggregate stated liquidation amount of the Trust Securities;

     - the interest rate and the interest and other payment dates on the Debt
       Securities will match the distribution rate and distribution and other
       payment dates for the Trust Securities;

     - CMS Energy shall pay all, and the Trust shall not be obligated to pay,
       directly or indirectly, all costs, expenses, debt and obligations of the
       Trust (other than with respect to the Trust Securities); and

     - the Trust Agreement further provides that CMS Energy Trustees shall not
       take or cause or permit the Trust to, among other things, engage in any
       activity that is not consistent with the purposes of the Trust.

     Payments of distributions (to the extent funds therefore are available) and
other payments due on the Trust Preferred Securities (to the extent funds
therefor are available) are guaranteed by CMS Energy as and to the extent set
forth under "The Guarantees" below. If CMS Energy does not make interest
payments on the Debt Securities purchased by the Trust, it is expected that the
Trust will not have sufficient funds to pay distributions on the Trust Preferred
Securities. The Guarantees do not apply to any payment of distributions unless
and until the Trust has sufficient funds for the payment of distributions and
other payments on the Trust Preferred Securities only if and to the extent that
CMS Energy has made a payment of interest or principal on the Debt Securities
held by the Trust as its sole asset. The Guarantees, when taken together with
CMS Energy's obligations under the Debt Securities and the Indenture and its
obligations under the Trust Agreement, including its obligations to pay costs,
expenses, debts and liabilities of the Trust (other than with respect to the
Trust securities), provide a full and unconditional guarantee of amounts on the
Trust Preferred Securities.

     If CMS Energy fails to make interest or other payments on the Debt
Securities when due (taking account of any extension period), the Trust
Agreement provides a mechanism

                                       24
<PAGE>   60

whereby the holders of the Trust Preferred Securities may direct a Property
Trustee to enforce its rights under the Debt Securities. If a Property Trustee
fails to enforce its rights under the Debt Securities, a holder of Trust
Preferred Securities may institute a legal proceeding against CMS Energy to
enforce a Property Trustee's rights under the Debt Securities without first
instituting any legal proceeding against a Property Trustee or any other person
or entity. Notwithstanding the foregoing, if an event of default has occurred
and is continuing under the Trust Agreement, and such event is attributable to
the failure of CMS Energy to pay interest or principal on the Debt Securities on
the date such interest or principal is otherwise payable (or in the case of
redemption on the redemption date), then a holder of Trust Preferred Securities
may institute legal proceedings directly against CMS Energy to obtain payment.
If CMS Energy fails to make payments under the Guarantees, the Guarantees
provide a mechanism whereby the holders of the Trust Preferred Securities may
direct a Guarantee Trustee to enforce its rights thereunder. Any holder of Trust
Preferred Securities may institute a legal proceeding directly against CMS
Energy to enforce a Guarantee Trustee's rights under a Guarantee without first
instituting a legal proceeding against the Trust, the Guarantee Trustee, or any
other person or entity.

THE GUARANTEES

     Set forth below is a summary of information concerning the Guarantees which
will be executed and delivered by CMS Energy for the benefit of the holders,
from time to time, of the Trust Preferred Securities. Each Guarantee will be
qualified as an indenture under the Trust Indenture Act of 1939. Either The Bank
of New York, or NBD Bank, each an independent trustee, will act as indenture
trustee under the Guarantees for the purpose of compliance with the provisions
of the Trust Indenture Act of 1939. This summary does not purport to be complete
and is subject in all respects to the provisions of, and is qualified in its
entirety by reference to, the Guarantees, which is filed as an exhibit to the
Registration Statement of which this prospectus forms a part.

GENERAL

     CMS Energy will irrevocably agree to pay in full, on a senior or
subordinated basis, as applicable, to the extent set forth herein, the Guarantee
Payments (as defined below) to the holders of the Trust Preferred Securities, as
and when due, regardless of any defense, right of set-off or counterclaim that
the Trust may have or assert other than the defense of payment. The following
payments with respect to the Trust Preferred Securities, to the extent not paid
by or on behalf of the Trust (the "GUARANTEE PAYMENTS"), will be subject to a
Guarantee: (i) any accumulated and unpaid distributions required to be paid on
the Trust Preferred Securities, to the extent that the Trust has funds on hand
available therefor at such time; (ii) the redemption price with respect to any
Trust Preferred Securities called for redemption to the extent that the Trust
has funds on hand available therefor at such time; or (iii) upon a voluntary or
involuntary dissolution, winding up or liquidation of the Trust (unless the Debt
Securities are distributed to holders of the Trust Preferred Securities), the
lesser of (a) the liquidation distribution, to the extent that the Trust has
funds on hand available therefor at such time, and (b) the amount of assets of
the Trust remaining available for distribution to holders of Trust Preferred
Securities. CMS Energy's obligation to make a Guarantee Payment may be satisfied
by direct payment of the required amounts of CMS Energy to the holders of the
Trust Preferred Securities or by causing the Trust to pay such amount to such
holders.

                                       25
<PAGE>   61

     Such Guarantees will be irrevocable guarantees, on a senior or subordinated
basis, as applicable, of the Trust's obligations under the Trust Preferred
Securities, but will apply only to the extent that the Trust has funds
sufficient to make such payments, and are not guarantees of collection. If CMS
Energy does not make interest payments on the Debt Securities held by the Trust,
the Trust will not be able to pay distributions on the Trust Preferred
Securities and will not have funds legally available therefor.

     CMS Energy has, through the Guarantees, the Trust Agreements, the Senior
Debentures, the Subordinated Debentures, the indentures and the Expense
Agreement, taken together, fully, irrevocably and unconditionally guaranteed all
of the Trust's obligations under the Trust Preferred Securities. No single
document standing alone or operating in conjunction with fewer than all of the
other documents constitutes such guarantee. It is only the combined operation of
these documents that has the effect of providing a full, irrevocable and
unconditional guarantee of the Trust's obligations under the Trust Preferred
Securities.

     CMS Energy has also agreed separately to irrevocably and unconditionally
guarantee the obligations of the Trust with respect to the Common Securities to
the same extent as the Guarantees, except that upon the occurrence and during
the continuation of a Trust Agreement Event of Default, holders of Trust
Preferred Securities shall have priority over holders of Common Securities with
respect to distributions and payments on liquidation, redemption or otherwise.

CERTAIN COVENANTS OF CMS ENERGY

     CMS Energy will covenant in each Guarantee that if and so long as (i) the
Trust is the holder of all the Debt Securities, (ii) a Tax Event (as defined in
the Guarantee) in respect of the Trust has occurred and is continuing and (iii)
CMS Energy has elected, and has not revoked such election, to pay Additional
Sums (as defined in the Guarantee) in respect of the Trust Preferred Securities
and Common Securities, CMS Energy will pay to the Trust such Additional Sums.
CMS Energy will also covenant that it will not, and it will not cause any of its
subsidiaries to (i) declare or pay any dividends or distributions on, or redeem,
purchase, acquire, or make a liquidation payment with respect to, any of CMS
Energy's capital stock or (ii) make any payment of principal, interest or
premium, if any, on or repay or repurchase or redeem any debt securities
(including guarantees of indebtedness for money borrowed) of CMS Energy that
rank pari passu (in the case of Subordinated Debentures with or junior in the
case of the Senior and Subordinated Debentures) to the Debt Securities (other
than (a) any dividend, redemption, liquidation, interest, principal or guarantee
payment by CMS Energy where the payment is made by way of securities (including
capital stock) that rank pari passu with or junior to the securities on which
such dividend, redemption, interest, principal or guarantee payment is being
made, (b) payments under the Guarantees, (c) purchases of CMS Energy Common
Stock related to the issuance of CMS Energy Common Stock under any of CMS
Energy's benefit plans for its directors, officers or employees, (d) as a result
of a reclassification of CMS Energy's capital stock or the exchange or
conversion of one series or class of CMS Energy's capital stock for another
series or class of CMS Energy's capital stock and (e) the purchase of fractional
interests in shares of CMS Energy's capital stock pursuant to the conversion or
exchange provisions of such capital stock or the security being converted or
exchanged) if at such time (i) there shall have occurred any event of which CMS
Energy has actual knowledge that (a) with the giving of notice or the lapse of
time, or both, would constitute a event of default and (b) in respect of which
CMS Energy shall

                                       26
<PAGE>   62

not have taken reasonable steps to cure, (ii) CMS Energy shall be in default
with respect to its payment of any obligations under the Guarantee or (iii) CMS
Energy shall have given notice of its selection of an Extension Period as
provided in the indentures with respect to the Debt Securities and shall not
have rescinded such notice, or such Extension Period, or any extension thereof,
shall be continuing. CMS Energy also will covenant to (i) for so long as Trust
Preferred Securities are outstanding, not convert Debt Securities except
pursuant to a notice of conversion delivered to the Conversion Agent by a holder
of Trust Preferred Securities, (ii) maintain directly or indirectly 100%
ownership of the Common Securities, provided that certain successors which are
permitted pursuant to the indentures may succeed to CMS Energy's ownership of
the Common Securities, (iii) not voluntarily terminate, wind-up or liquidate the
Trust, except (a) in connection with a distribution of the Debt Securities to
the holders of the Trust Preferred Securities in liquidation of the Trust or (b)
in connection with certain mergers, consolidations or amalgamations permitted by
the Trust Agreement, (iv) maintain the reservation for issuance of the number of
shares of CMS Energy Common Stock that would be required from time to time upon
the conversion of all the Debt Securities then outstanding, (v) use its
reasonable efforts, consistent with the terms and provisions of the Trust
Agreement, to cause the Trust to remain classified as a grantor trust and not as
an association taxable as a corporation for United States federal income tax
purposes and (vi) deliver shares of CMS Energy Common Stock upon an election by
the holders of the Trust Preferred Securities to convert such Trust Preferred
Securities into CMS Energy Common Stock.

     As part of the Guarantees, CMS Energy will agree that it will honor all
obligations described therein relating to the conversion or exchange of the
Trust Preferred Securities into or for CMS Energy Common Stock, Senior
Debentures or Subordinated Debentures.

AMENDMENTS AND ASSIGNMENT

     Except with respect to any changes which do not materially adversely affect
the rights of holders of the Trust Preferred Securities (in which case no vote
will be required), the Guarantees may not be amended without the prior approval
of the holders of not less than a majority in aggregate liquidation amount of
such outstanding Trust Preferred Securities. All guarantees and agreements
contained in the Guarantees shall bind the successors, assigns, receivers,
trustees and representatives of CMS Energy and shall inure to the benefit of the
holders of the Trust Preferred Securities then outstanding.

TERMINATION OF THE GUARANTEES

     The Guarantees will terminate and be of no further force and effect upon
full payment of the redemption price of the Trust Preferred Securities, upon
full payment of the amounts payable upon liquidation of the Trust, upon the
distribution, if any, of CMS Energy Common Stock to the holders of Trust
Preferred Securities in respect of the conversion of all such holders' Trust
Preferred Securities into CMS Energy Common Stock or upon distribution of the
Debt Securities to the holders of the Trust Preferred Securities in exchange for
all of the Trust Preferred Securities. The Guarantees will continue to be
effective or will be reinstated, as the case may be, if at any time any holder
of Trust Preferred Securities must restore payment of any sums paid under such
Trust Preferred Securities or the Guarantees.

                                       27
<PAGE>   63

EVENTS OF DEFAULT

     An event of default under a Guarantee will occur upon the failure of CMS
Energy to perform any of its payment or other obligations thereunder. The
holders of a majority in aggregate liquidation amount of the Trust Preferred
Securities have the right to direct the time, method and place of conducting any
proceeding for any remedy available to a Guarantee Trustee in respect of a
Guarantee or to direct the exercise of any trust or power conferred upon a
Guarantee Trustee under the Guarantees.

     If a Guarantee Trustee fails to enforce a Guarantee, any holder of the
Trust Preferred Securities may institute a legal proceeding directly against CMS
Energy to enforce its rights under such Guarantee without first instituting a
legal proceeding against the Trust, the Guarantee Trustee or any other person or
entity. In addition, any record holder of Trust Preferred Securities shall have
the right, which is absolute and unconditional, to proceed directly against CMS
Energy to obtain Guarantee Payments, without first waiting to determine if the
Guarantee Trustee has enforced a Guarantee or instituting a legal proceeding
against the Trust, the Guarantee Trustee or any other person or entity. CMS
Energy has waived any right or remedy to require that any action be brought just
against the Trust, or any other person or entity before proceeding directly
against CMS Energy.

     CMS Energy, as guarantor, is required to file annually with each Guarantee
Trustee a certificate as to whether or not CMS Energy is in compliance with all
the conditions and covenants applicable to it under the Guarantees.

STATUS OF THE GUARANTEES

     The Guarantees will constitute unsecured obligations of CMS Energy and will
rank equal to or subordinate and junior in right of payment to all other
liabilities of CMS Energy, as applicable. The Guarantees will rank pari passu
with or senior to, as applicable, any guarantee now or hereafter entered into by
CMS Energy in respect of any preferred or preference stock of any affiliate of
CMS Energy.

     The Guarantees will constitute a guarantee of payment and not of collection
(i.e., the guaranteed party may institute a legal proceeding directly against
the Guarantor to enforce its rights under the Guarantee without first
instituting a legal proceeding against any other person or entity). The
Guarantees will be held for the benefit of the holders of the Trust Preferred
Securities. The Guarantees will not be discharged except by payment of the
Guarantee Payments in full to the extent not paid by the Trust or upon
distribution of the Debt Securities to the holders of the Trust Preferred
Securities. The Guarantees do not place a limitation on the amount of additional
indebtedness that may be incurred by CMS Energy or any of its subsidiaries.

DESCRIPTION OF STOCK PURCHASE CONTRACTS AND STOCK PURCHASE UNITS

     CMS Energy may issue Stock Purchase Contracts, representing contracts
obligating holders to purchase from CMS Energy, and CMS Energy to sell to the
holders, a specified number of shares of CMS Energy Common Stock at a future
date or dates. The price per share of CMS Energy Common Stock may be fixed at
the time the Stock Purchase Contracts are issued or may be determined by
reference to a specific formula set forth in the Stock Purchase Contracts. The
Stock Purchase Contracts may be issued separately or as part of Stock Purchase
Units consisting of a Stock Purchase Contract and Senior Debentures,
Subordinated Debentures, Trust Preferred Securities or debt obligations of

                                       28
<PAGE>   64

third parties, including U.S. Treasury securities, securing the holders'
obligations to purchase the Common Stock under the Stock Purchase Contracts. The
Stock Purchase Contracts may require CMS Energy to make periodic payments to the
holders of the Stock Purchase Units or visa versa, and such payments may be
unsecured or refunded on some basis. The Stock Purchase Contracts may require
holders to secure their obligations thereunder in a specified manner.

     The applicable prospectus supplement will describe the terms of any Stock
Purchase Contracts or Stock Purchase Units. The description in the prospectus
supplement will not purport to be complete and will be qualified in its entirety
by reference to the Stock Purchase Contracts, and, if applicable, collateral
arrangements and depositary arrangements, relating to such Stock Purchase
Contracts or Stock Purchase Units.

                                 LEGAL OPINIONS

     Opinions as to the legality of certain of the Offered Securities will be
rendered for CMS Energy by Michael D. Van Hemert, Esq., Assistant General
Counsel for CMS Energy. Certain matters of Delaware law relating to the validity
of the Trust Preferred Securities will be passed upon on behalf of the Trusts by
Skadden, Arps, Slate, Meagher & Flom LLP, special Delaware counsel to the
Trusts. Certain United States Federal income taxation matters may be passed upon
for CMS Energy and the Trust by either Theodore J. Vogel, tax counsel for CMS
Energy, or by special tax counsel to CMS Energy and of the Trust, who will be
named in the prospectus supplement. Certain legal matters with respect to
Offered Securities will be passed upon by counsel for any underwriters, dealers
or agents, each of whom will be named in the related prospectus supplement.

                                    EXPERTS

     The consolidated financial statements and schedule of CMS Energy as of
December 31, 1998 and 1997, and for each of the three years in the period ended
December 31, 1998 incorporated by reference in this prospectus, have been
audited by Arthur Andersen LLP, independent public accountants, as indicated in
their reports with respect thereto, and are included herein in reliance upon the
authority of said firm as experts in accounting and auditing in giving said
reports.

     Future consolidated financial statements of CMS Energy and the reports
thereon of Arthur Andersen LLP also will be incorporated by reference in this
prospectus in reliance upon the authority of that firm as experts in giving
those reports to the extent that said firm has audited said consolidated
financial statements and consented to the use of their reports thereon.

                              PLAN OF DISTRIBUTION

     CMS Energy and/or the Trusts may sell the Offered Securities: (i) through
the solicitation of proposals of underwriters or dealers to purchase the Offered
Securities; (ii) through underwriters or dealers on a negotiated basis; (iii)
directly to a limited number of purchasers or to a single purchaser; or (iv)
through agents. The prospectus supplement with respect to any Offered Securities
will set forth the terms of such offering, including the name or names of any
underwriters, dealers or agents; the purchase price of

                                       29
<PAGE>   65

the Offered Securities and the proceeds to CMS Energy and/or the Trust from such
sale; any underwriting discounts and commissions and other items constituting
underwriters' compensation; any initial public offering price and any discounts
or concessions allowed or reallowed or paid to dealers and any securities
exchange on which such Offered Securities may be listed. Any initial public
offering price, discounts or concessions allowed or reallowed or paid to dealers
may be changed from time to time.

     If underwriters are used in the sale, the Offered Securities will be
acquired by the underwriters for their own account and may be resold from time
to time in one or more transactions, including negotiated transactions, at a
fixed public offering price or at varying prices determined at the time of sale.
The Offered Securities may be offered to the public either through underwriting
syndicates represented by one or more managing underwriters or directly by one
or more firms acting as underwriters. The underwriter or underwriters with
respect to a particular underwritten offering of Offered Securities will be
named in the prospectus supplement relating to such offering and, if an
underwriting syndicate is used, the managing underwriter or underwriters will be
set forth on the cover of such prospectus supplement. Unless otherwise set forth
in the prospectus supplement relating thereto, the obligations of the
underwriters to purchase the Offered Securities will be subject to certain
conditions precedent, and the underwriters will be obligated to purchase all the
Offered Securities if any are purchased.

     If dealers are utilized in the sale of Offered Securities, CMS Energy
and/or the Trusts will sell such Offered Securities to the dealers as
principals. The dealers may then resell such Offered Securities to the public at
varying prices to be determined by such dealers at the time of resale. The names
of the dealers and the terms of the transaction will be set forth in the
prospectus supplement relating thereto.

     The Offered Securities may be sold directly by CMS Energy and/or the Trusts
or through agents designated by CMS Energy and/or the Trusts from time to time.
Any agent involved in the offer or sale of the Offered Securities of which this
prospectus is delivered will be named, and any commissions payable by CMS Energy
and/or the Trusts to such agent will be set forth, in the prospectus supplement
relating thereto. Unless otherwise indicated in the prospectus supplement, any
such agent will be acting on a best efforts basis for the period of its
appointment.

     The Offered Securities may be sold directly by CMS Energy and/or the Trust
to institutional investors or others, who may be deemed to be underwriters
within the meaning of the Securities Act with respect to any resale thereof. The
terms of any such sales will be described in the prospectus supplement relating
thereto.

     The CMS Energy Common Stock and the Class G Common Stock may be offered
other than through the facilities of a national securities exchange and other
than to or through a market marker other than on an exchange.

     Agents, dealers and underwriters may be entitled under agreements with CMS
Energy and/or the Trust to indemnification by CMS Energy and/or the Trust
against certain civil liabilities, including liabilities under the Securities
Act, or to contribution with respect to payments which such agents, dealers or
underwriters may be required to make in respect thereof. Agents, dealers and
underwriters may be customers of, engage in transactions with, or perform
services for CMS Energy and/or the Trust in the ordinary course of business.

     The Offered Securities may also be offered and sold, if so indicated in the
applicable prospectus supplement, in connection with a remarketing upon their
purchase, in

                                       30
<PAGE>   66

accordance with a redemption or repayment pursuant to their terms, or otherwise,
by one or more firms ("REMARKETING FIRMS"), acting as principals for their own
accounts or as agents for CMS Energy and/or the Trusts. Any remarketing firm
will be identified and the terms of its agreement, if any, with its compensation
will be described in the applicable prospectus supplement. Remarketing firms may
be deemed to be underwriters, as such term is defined in the Securities Act, in
connection with the Offered Securities remarketed thereby. Remarketing firms may
be entitled under agreements which may be entered into with CMS Energy and/or
the Trusts to indemnification or contribution by CMS Energy and/or the Trusts
against certain civil liabilities, including liabilities under the Securities
Act, and may be customers of, engage in transactions or perform services for CMS
Energy and its subsidiaries in the ordinary course of business.

     The Offered Securities may or may not be listed on a national securities
exchange. Reference is made to the prospectus supplement with regard to such
matter. No assurance can be given that there will be a market for any of the
Offered Securities.

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