VAN KAMPEN AMERICAN CAPITAL EQUITY OPPORTUNITY TRUST SER 115, S-6, 1998-09-23

VAN KAMPEN AMERICAN CAPITAL EQUITY OPPORTUNITY TRUST SER 115
S-6, 1998-09-23

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FILE NO: 333-
CIK #1025261

SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549-1004
FORM S-6

For Registration under the Securities Act of 1933 of Securities of Unit
Investment Trusts Registered on Form N-8B-2.

A. Exact name of Trust: VAN KAMPEN FOCUS PORTFOLIOS, SERIES 115

B. Name of Depositor: VAN KAMPEN FUNDS INC.

C. Complete address of Depositor's principal executive offices:

One Parkview Plaza
Oakbrook Terrace Illinois 60181

D. Name and complete address of agents for service:

CHAPMAN AND CUTLER VAN KAMPEN FUNDS INC.
Attention: Mark J. Kneedy Attention: Don G. Powell, Chairman
111 West Monroe Street One Parkview Plaza
Chicago, Illinois 60603 Oakbrook Terrace, Illinois 60181

E. Title of securities being registered: Units of undivided fractional
beneficial interests

F. Approximate date of proposed sale to the public: AS SOON AS PRACTICABLE
AFTER THE EFFECTIVE DATE OF THE REGISTRATION STATEMENT

- --------------------------------------------------------------------------------
The registrant hereby amends this Registration Statement on such date or dates
as may be necessary to delay its effective date until the registrant shall file
a further amendment which specifically states that this Registration Statement
shall thereafter become effective in accordance with Section 8(a) of the
Securities Act of 1933 or until the Registration Statement shall become
effective on such date as the Commission, acting pursuant to said Section 8(a)
may determine.

VAN KAMPEN FOCUS PORTFOLIOS
SERIES 115
CROSS REFERENCE SHEET

PURSUANT TO RULE 404(C) OF REGULATION C
UNDER THE SECURITIES ACT OF 1933
(FORM N-8B-2 ITEMS REQUIRED BY INSTRUCTION
1 AS TO PROSPECTUS ON FORM S-6)

FORM N-8B-2 FORM S-6
ITEM NUMBER HEADING IN PROSPECTUS

I. ORGANIZATION AND GENERAL INFORMATION

1. (a) Name of trust ) Prospectus Front Cover Page

(b) Title of securities issued ) Prospectus Front Cover Page

2. Name and address of Depositor ) Summary of Essential Financial
) Information
) Trust Administration

3. Name and address of Trustee ) Summary of Essential Financial
) Information
) Trust Administration

4. Name and address of principal ) Trust Administration
underwriter

5. Organization of trust ) The Trusts

6. Execution and termination of ) The Trusts
Trust Indenture and Agreement ) Trust Administration

7. Changes of Name ) *

8. Fiscal year ) *

9. Material Litigation ) *

II. GENERAL DESCRIPTION OF THE TRUST AND SECURITIES OF THE TRUST

10. General information regarding ) The Trusts
Trust's securities and ) Federal Taxation
rights of security holders ) Public Offering
) Rights of Unitholders
) Trust Administration
) Risk Factors

11. Type of securities comprising ) Prospectus Front Cover Page
units ) The Trusts
) Trust Portfolios
) Risk Factors

12. Certain information regarding ) *
periodic payment certificates )

13. (a) Loan, fees, charges and expenses) Prospectus Front Cover Page
) Summary of Essential Financial
) Information
) Trust Portfolios
)
) Trust Operating Expenses
) Public Offering
) Rights of Unitholders

(b) Certain information regarding )
periodic payment plan ) *
certificates )

(c) Certain percentages ) Prospectus Front Cover Page
) Summary of Essential Financial
) Information
)
) Public Offering
) Rights of Unitholders

(d) Certain other fees, expenses or ) Trust Operating Expenses
charges payable by holders ) Rights of Unitholders

(e) Certain profits to be received ) Public Offering
by depositor, principal ) Trust Portfolios
underwriter, trustee or any )
affiliated persons )

(f) Ratio of annual charges ) *
to income )

14. Issuance of Trust's securities ) Rights of Unitholders

15. Receipt and handling of payments ) *
from purchasers )

16. Acquisition and disposition of ) The Trusts
underlying securities ) Rights of Unitholders
) Trust Administration

17. Withdrawal or redemption ) Rights of Unitholders
) Trust Administration
18. (a) Receipt and disposition ) Prospectus Front Cover Page
of income ) Rights of Unitholders

(b) Reinvestment of distributions ) *

19. Records, accounts and reports ) Rights of Unitholders
) Trust Administration

20. Certain miscellaneous provisions ) Trust Administration
of Trust Agreement )

21. Loans to security holders ) *

22. Limitations on liability ) Trust Portfolios
) Trust Administration
23. Bonding arrangements ) *

24. Other material provisions of ) *
Trust Indenture Agreement )

III. ORGANIZATION, PERSONNEL AND AFFILIATED PERSONS OF DEPOSITOR

25. Organization of Depositor ) Trust Administration

26. Fees received by Depositor ) *

27. Business of Depositor ) Trust Administration

28. Certain information as to ) *
officials and affiliated )
persons of Depositor )

29. Companies owning securities ) *
of Depositor )
30. Controlling persons of Depositor ) *

31. Compensation of Officers of ) *
Depositor )

32. Compensation of Directors ) *

33. Compensation to Employees ) *

34. Compensation to other persons ) *

IV. DISTRIBUTION AND REDEMPTION OF SECURITIES

35. Distribution of trust's securities ) Public Offering
by states )

36. Suspension of sales of trust's ) *
securities )
37. Revocation of authority to ) *
distribute )

38. (a) Method of distribution )
)
(b) Underwriting agreements ) Public Offering
)
(c) Selling agreements )

39. (a) Organization of principal ) *
underwriter )

(b) N.A.S.D. membership by ) *
principal underwriter )

40. Certain fees received by ) *
principal underwriter )

41. (a) Business of principal ) Trust Administration
underwriter )

(b) Branch offices or principal ) *
underwriter )

42. Ownership of securities of ) *
the trust )

43. Certain brokerage commissions ) *
received by principal underwriter )

44. (a) Method of valuation ) Prospectus Front Cover Page
) Summary of Essential Financial
) Information
) Trust Operating Expenses
) Public Offering
(b) Schedule as to offering ) *
price )

46. (a) Redemption valuation ) Rights of Unitholders
) Trust Administration
(b) Schedule as to redemption ) *
price )

47. Purchase and sale of interests ) Public Offering
in underlying securities ) Trust Administration

V. INFORMATION CONCERNING THE TRUSTEE OR CUSTODIAN

48. Organization and regulation of ) Trust Administration
trustee )

49. Fees and expenses of trustee ) Summary of Essential Financial
) Information
) Trust Operating Expenses

50. Trustee's lien ) Trust Operating Expenses

VI. INFORMATION CONCERNING INSURANCE OF HOLDERS OF SECURITIES

51. Insurance of holders of trust's )
securities ) *

52. (a) Provisions of trust agreement )
with respect to replacement ) Trust Administration
or elimination portfolio )
securities )

(b) Transactions involving )
elimination of underlying ) *
securities )

(d) Fundamental policy not ) *
otherwise covered )

53. Tax Status of trust ) Federal Taxation

VII. FINANCIAL AND STATISTICAL INFORMATION

54. Trust's securities during ) *
last ten years )

55. )
56. Certain information regarding ) *
57. periodic payment certificates )
58. )

59. Financial statements (Instructions ) Report of Independent Certified
1(c) to Form S-6) ) Public Accountants
) Statements of Condition

- ----------------------------------------------
* Inapplicable, omitted, answer negative or not required

The information in this prospectus is not complete and may be changed. No
person may sell Units of the Trusts until the registration statement filed with
the Securities and Exchange Commission is effective. This prospectus is not an
offer to sell Units and is not soliciting an offer to buy Units in any state
where the offer or sale is not permitted.

PRELIMINARY PROSPECTUS DATED SEPTEMBER 23, 1998
SUBJECT TO COMPLETION

VAN KAMPEN

VAN KAMPEN FOCUS PORTFOLIOS

THE DOW 30 INDEXSM TRUST, SERIES 5 GREAT INTERNATIONAL FIRMS TRUST, SERIES 6
THE DOW 30SM & TREASURY TRUST, SERIES 7 BRAND NAME EQUITY TRUST, SERIES 7

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

Van Kampen Focus Portfolios, Series 115 includes the unit investment trusts
described above (the "Trusts"). Each Trust seeks to increase the value of your
investment by investing in a diversified portfolio of stocks. The Dow 30SM &
Treasury Trust also seeks to preserve capital by investing a portion of its
portfolio in U.S. Treasury obligations. Both Dow 30SM Trusts also seek to
provide dividend income. Of course, we cannot guarantee that a Trust will
achieve its objective.

The Units are not deposits or obligations of any bank or government agency
and are not guaranteed.

OCTOBER 6, 1998

YOU SHOULD READ THIS PROSPECTUS AND RETAIN IT FOR FUTURE REFERENCE.

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

The Securities and Exchange Commission has not approved or disapproved of
the Units or passed upon the adequacy or accuracy of this prospectus. Any
contrary representation is a criminal offense.

<TABLE>
SUMMARY OF ESSENTIAL FINANCIAL INFORMATION
OCTOBER 6, 1998
<CAPTION>

THE DOW BRAND
THE DOW 30SM & GREAT NAME
30 INDEXSM TREASURY INTERNATIONAL EQUITY
TRUST TRUST FIRMS TRUST TRUST
-------------- -------------- -------------- --------------
<S> <C> <C> <C> <C>
PUBLIC OFFERING PRICE
Aggregate value of Securities per Unit (1) $ 9.55 $ 9.55 $ 9.90 $ 9.90
Sales charge 0.45 0.45 0.45 0.45
Less deferred sales charge 0.00 0.00 0.35 0.35
Public offering price per Unit (2) $ 10.00 $ 10.00 $ 10.00 $ 10.00

TRUST INFORMATION
Initial number of Units (3)
Aggregate value of Securities (1) $ $ $ $
Estimated initial distribution per Unit (4) $ $ $ $
Estimated annual dividends per Unit (4) $ $ $ $
Redemption price per Unit (5) $ $ $ $
Mandatory Termination Dates October 6, 2008 __________, 2014 October 6, 2003 October 6, 2003
</TABLE>

GENERAL INFORMATION
Initial Date of Deposit October 6, 1998
Record Dates Tenth day of March, June, September and December
Distribution Dates Twenty-fifth day of March, June, September and December

- --------------------------------------------------------------------------------
(1)Each stock in a Trust is valued at the last closing sale price on its
principal trading exchange or at the last asked price if not listed on the
day before the Initial Date of Deposit. U.S. Treasury obligations are valued
at the offer side evaluation on the day before the Initial Date of Deposit.
You will bear all or a portion of the expenses incurred in organizing and
offering your Trust. The Public Offering Price includes the estimated amount
of these costs. The Trustee will deduct these expenses from your Trust at the
end of the initial offering period (approximately three months). The
estimated amount for each Trust is described on the next page.
(2)The Public Offering Price will include any accumulated dividends or cash in
the Income or Capital Accounts of a Trust.
(3)At the Evaluation Time on the Initial Date of Deposit, the number of Units
may be adjusted so that the Public Offering Price per Unit equals $10. The
number of Units and fractional interest of each Unit in a Trust will increase
or decrease to the extent of any adjustment.
(4)This estimate is based on the most recently declared quarterly dividends or
interim and final dividends accounting for any foreign withholding taxes.
Actual dividends may vary due to a variety of factors. See "Risk Factors".
(5)The redemption price is reduced by any remaining deferred sales charge. See
"Rights of Unitholders--Redemption of Units". The redemption price includes
the estimated organizational and offering costs. The redemption price will
not included these costs after the initial offering period.

<TABLE>
<CAPTION>
FEE TABLE

THE DOW BRAND
THE DOW 30SM & GREAT NAME
30 INDEXSM TREASURY INTERNATIONAL EQUITY
TRUST TRUST FIRMS TRUST TRUST
----------- ----------- ----------- -----------
<S> <C> <C> <C> <C>
TRANSACTION FEES (AS % OF OFFERING PRICE)
Initial sales charge (1) 4.50% 4.50% 1.00% 1.00%
Deferred sales charge (2) 0.00% 0.00% 3.50% 3.50%
----------- ----------- ----------- -----------
Maximum sales charge 4.50% 4.50% 4.50% 4.50%
=========== =========== =========== ===========
Maximum sales charge on reinvested dividends 0.00% 0.00% 3.50% 3.50%
=========== =========== =========== ===========

ESTIMATED ORGANIZATIONAL COSTS PER UNIT (3) $ $ $ $
=========== =========== =========== ===========

ESTIMATED ANNUAL EXPENSES PER UNIT
Trustee's fee and operating expenses $ $ $ $
Supervisory and evaluation fees $ 0.00500 $ 0.00500 $ 0.00500 $ 0.00500
----------- ----------- ----------- -----------
Estimated annual expenses per Unit $ $ $ $
=========== =========== =========== ===========

ESTIMATED COSTS OVER TIME
One year $ $ $ $
Three years $ $ $ $
Five years $ $ $ $
Ten years $ $ N/A N/A
</TABLE>

This fee table is intended to assist you in understanding the costs that you
will bear and to present a comparison of fees. The "Estimated Costs Over Time"
example illustrates the expenses you would pay on a $1,000 investment assuming a
5% annual return and redemption at the end of each period. This example assumes
that you reinvest all distributions at the end of each year. Of course, you
should not consider this example a representation of actual past or future
expenses or annual rate of return which may differ from those assumed for this
example. The sales charge and expenses are described under "Public Offering" and
"Trust Operating Expenses".

- --------------------------------------------------------------------------------
(1)The initial sales charge is the difference between the maximum sales charge
and the deferred sales charge.
(2)The deferred sales charge is actually equal to $0.35 per Unit (The Dow 30SM
Trusts do not impose a deferred sales charge). This amount will exceed the
percentage above if the Public Offering Price per Unit falls below $10 and
will be less than the percentage above if the Public Offering Price per Unit
exceeds $10. The deferred sales charge accrues daily and is assessed from
February ___, 1999 through October ___, 1999.
(3)You will bear all or a portion of the expenses incurred in organizing and
offering your Trust. The Trustee will deduct the actual amount of these
expenses from your Trust at the end of the initial offering period.

THE DOW 30 INDEXSM TRUST

The Trust seeks to increase the value of your Units over time and provide
dividend income by investing in a portfolio of common stocks of the companies in
the Dow Jones Industrial AverageSM. These stocks are some of the most
widely-held and well-capitalized companies in the world. We believe that The Dow
30SM stocks have historically provided a consistent and more conservative source
of dividend income and capital appreciation than many other types of equity
securities.

[CHART APPEARS HERE]

o Portfolio of "blue chip" stocks
o Cross section of American industrial companies
o May help outpace inflation

The Trust initially includes a portfolio that replicates the Dow Jones
Industrial AverageSM. During the Trust's life, we will change the portfolio to
reflect any change in the component stocks in The DowSM. We will not change the
portfolio to reflect any change in the weightings of the components within The
DowSM during the Trust's life. However, the Dow Jones Industrial AverageSM has
always been based on one share of each component stock.

As with any investment, we cannot guarantee that the Trust will achieve its
objective. The value of your Units may fall below the price you paid for the
Units. The performance of the Trust will differ from the performance of The
DowSM because the Trust includes expenses and a sales charge. You should read
the "Risk Factors" section before you invest.

THE DOW JONES INDUSTRIAL AVERAGESM. Charles H. Dow first unveiled his
industrial stock average on May 26, 1896. Dow Jones & Company, Inc. first
published the Dow Jones Industrial AverageSM in The Wall Street Journal on
October 7, 1896. Initially consisting of just 12 stocks, The DowSM expanded to
20 stocks in 1916 and its present size of 30 stocks on October 1, 1928. The most
recent change to The DowSM occurred March 17, 1997, when Dow Jones replaced four
companies in the index. The companies included in The DowSM have remained
relatively constant over time.

The DowSM stocks are all major factors in their industries and are widely
held by individuals and institutions. The stocks represent about one-fifth of
the market value of all U.S. stocks. All of The DowSM stocks currently trade on
the New York Stock Exchange. These stocks represent about one-fourth of the
value of all stocks listed on the Exchange.

The editors of The Wall Street Journal select the components of The DowSM.
The editors have traditionally considered all companies that are not in the
transportation or utilities sectors for inclusion in the index. In choosing a
new component, the editors look among substantial industrial companies with a
history of successful growth and wide interest among investors. They believe
that stability of composition enhances the index. Whenever the editors change
one stock, they typically review the other stocks. Of course, we cannot
guarantee that they will follow this process or consider these factors in the
future.

"Dow JonesSM", "Dow Jones Industrial AverageSM", "The Dow 30SM", "The DowSM"
and "DJIASM" are proprietary to and service marks of Dow Jones & Company, Inc.
and have been licensed for use for certain purposes by the Trust. The Trust is
not sponsored, endorsed, sold or promoted by Dow Jones and Dow Jones makes no
representation regarding the advisability of investing in the Trust.

<TABLE>
<CAPTION>
PORTFOLIO
- -------------------------------------------------------------------------------------------------------------------
CURRENT COST OF
NUMBER MARKET VALUE DIVIDEND SECURITIES
OF SHARES NAME OF ISSUER (1) PER SHARE (2) YIELD (3) TO TRUST (2)
- ---------- ----------------------------------- --------------- ----------- -------------
<S> <C> <C> <C> <C>
Allied Signal $ % $
Aluminum Company of America
American Express Company
AT&T Corporation
Boeing Company
Caterpillar, Inc.
Chevron Corporation
Coca-Cola Company
Eastman Kodak Company
E.I. du Pont de Nemours & Company
Exxon Corporation
General Electric Company
General Motors Corporation
Goodyear Tire & Rubber Company
Hewlett-Packard Company
International Business Machines Corporation
International Paper Company
J.P. Morgan & Company, Inc.
Johnson & Johnson
McDonald's Corporation
Merck & Company, Inc.
Minnesota Mining & Manufacturing Company
Philip Morris Companies, Inc.
Procter & Gamble Company
Sears, Roebuck and Company
Travelers Group, Inc.
Union Carbide Corporation
United Technologies Corporation
Wal-Mart Stores, Inc.
Walt Disney Company
- ---------- ------------
$
========== ============
</TABLE>

See "Notes to Portfolios".

THE DOW 30SM & TREASURY TRUST

The Trust seeks to increase the value of your Units over time and provide
dividend income while also providing protection of principal. The Trust invests
in a portfolio of common stocks of the companies in the Dow Jones Industrial
AverageSM on the day before the Initial Date of Deposit and U.S. Treasury
obligations. The Trust seeks to provide protection of your principal by
combining an investment in blue chip stocks with U.S. Treasury obligations.

THE DOW JONES INDUSTRIAL AVERAGESM. The DowSM stocks are all major factors in
their industries and are widely held by individuals and institutions. These
stocks are some of the most widely-held and well-capitalized companies in the
world. We believe that The DowSM stocks have historically provided a consistent
and more conservative source of dividend income and capital appreciation than
many other types of equity securities. All of The DowSM stocks currently trade
on the New York Stock Exchange. More information about The DowSM is presented
under "The Dow 30 IndexSM Trust".

Approximately half of the initial portfolio replicates the Dow Jones
Industrial AverageSM on the day before the Initial Date of Deposit. The
component stocks or the weightings of the stocks in The DowSM may change from
time to time. We will not change the Trust portfolio to reflect any change in
The DowSM.

PRINCIPAL PROTECTION. By investing approximately half of the initial
portfolio in U.S. Treasury obligations, the Trust offers an investment similar
to The Dow 30 IndexSM Trust while also seeking protection of principal. We
structured the portfolio so that you should receive at least $11 per Unit if you
hold your Units through maturity of the Treasury obligations. This feature
provides you with total principal protection if you purchase Units for $11 or
less (including any sales charge).

The Treasury obligations do not pay interest while they are outstanding.
However, you will be subject to tax with respect to amortization of original
issue discount on the Treasury obligations as if a distribution had occurred.
You should read the "Taxation" section for more information.

As with any investment, we cannot guarantee that the Trust will achieve its
objective. The value of your Units may fall below the price you paid for the
Units. You should read the "Rick Factors" section before you invest.

MATURITY
VALUE NAME OF ISSUER AND MATURITY DATE (1)
- ---------- --------------------------------------------------------------------------
$ U.S. Treasury STRIPS maturing __________, 2014 $
- ---------- ------------

============
</TABLE>

See "Notes to Portfolios".

GREAT INTERNATIONAL FIRMS TRUST

The Trust seeks to provide the potential for capital appreciation. In
selecting the Securities, we considered the following factors, among others: the
extent to which the issuers are global leaders in their respective markets and
industries; the extent to which the issuers are leading companies within their
home markets; the attractiveness of the Securities based on an evaluation of
return on equity, price to earnings ratio and price to cash flows; and the
diversification of the Trust portfolio by countries and industries. We attempted
to select companies from developed, industrialized countries that are
well-capitalized world and market leaders, exhibit attractive balance sheets and
offer a diversified line of products and/or services.

The Trust seeks to provide the potential for greater rewards from a
diversified international investment portfolio. In the past eleven years, the
U.S. stock market (as represented by the Standard & Poor's 500 Index) has ranked
among the top five markets in total return only one time and has never ranked
first. Many global equity markets have outperformed the U.S. market in past
years. International firms across the globe are expanding their business,
exporting to more countries and becoming better known to the investment
community. By investing in international stocks, you may benefit from greater
growth potential and added diversity than by concentrating in U.S. securities
alone. If you invested only in a portfolio of U.S. securities, a negative turn
in the market could adversely affect the portfolio. By dedicating a portion of
an investment portfolio to global investments, you may be better protected
against negative movements in a single market. The Trust seeks to provide a
convenient and efficient way to take advantage of the growth potential of
international investing by offering a diversified portfolio of blue chip,
industry-leading companies in countries around the world.

The table below illustrates that no single stock market has dominated over
time and that foreign markets have generally offered returns superior to those
available in the U.S. The table shows the total returns of the top performing
stock markets in developed countries for each of the years indicated (as
represented by Morgan Stanley Capital International indices) compared with the
U.S. market (as represented by the Standard & Poor's 500 Index).

TOTAL RETURN TOTAL RETURN
TOP PERFORMING MARKET UNITED STATES MARKET
---------------------- --------------------

1986 112.77% (Spain) 13.42%
1987 55.96% (Finland) 0.61%
1988 50.19% (Denmark) 11.64%
1989 101.12% (Austria) 26.91%
1990 5.99% (United Kingdom) (5.59%)
1991 42.77% (Hong Kong) 27.17%
1992 27.42% (Hong Kong) 4.16%
1993 109.91% (Hong Kong) 7.02%
1994 51.29% (Finland) (0.85%)
1995 42.42% (Switzerland) 34.74%
1996 41.27% (Spain) 22.90%
1997 44.84% (Switzerland) 33.10%

The table represents historical performance of unmanaged indices which are
composites of equity securities considered representative of equity performance
in the countries specified. The historical performance is shown for illustrative
purposes only, represents past performance which is not indicative of future
performance of the Trust and does not include sales charges or expenses which
are imposed on Trust Units.

See "Notes to Portfolios".

BRAND NAME EQUITY TRUST

The Trust seeks to provide the potential for capital appreciation and income,
consistent with the preservation of invested capital. We attempted to select a
portfolio of leading brand name companies that provide the potential for growth
at sustainably higher rates than the general stock market for an extended period
of time. In selecting the Securities, we considered the following factors, among
others: (a) the issuer's position within the industry, (b) breadth and stability
of the issuer's business base and (c) growth potential.

Most of the products produced by the issuers in the Trust are consumable
products used around the world. We believe that global demographics provide the
potential for growth in these products in excess of overall economic growth. The
companies in the Trust are generally leaders in their field. We believe these
leadership positions should be sustained given the stability of the markets
generally and the strength of these companies. In addition, we attempted to
select companies with superior management which can help the company maintain a
leadership position within its market. We attempted to select companies which
exhibit attractive balance sheets, strong cash flow and above-average returns on
investment. Exploitation of the attractive product markets requires investment
to drive future growth. Debt capacity and cash flow may help to provide a
company the ability to reinvest in the business. A high return on investment
(and return on equity) may provide the potential for high growth rates from
reinvestment.

Consumer Products Companies. Companies within the non-durable consumer goods
industry are typically considered growth companies. A growth company is
generally defined as a relatively steady performer over time which provides the
potential to sustain an above-average growth rate during various economic
cycles. Because of their size, resilience and strength, brand name companies
appear to be some of the most favorable growth companies in which to invest. We
believe that brand name companies are poised to benefit as access to and
consumer demand in developing countries continues to grow. Many of these
companies are industry leaders in domestic and international markets.

They are established, well-managed, financially strong and proven performers.
Many companies have undertaken restructuring and expansion projects which have
increased their profit potential. As large companies, they are able to provide
their brands with a great deal of support, including large advertising budgets,
research and development prowess, effective distribution and promotional
efforts, exposure to international markets and expansion to capitalize on growth
opportunities in developing countries. We believe that as cost differences
between brand name and generic products shrink, consumers may pay a premium for
products they recognize and believe to be of better quality.

The Food and Beverage Industry. The Department of Commerce ranks the food and
beverage industry as the second largest U.S. manufacturing sector. In recent
years, this industry has had consistently positive earnings and has tended to be
recession-resistant. Performance has reflected consumer demand more than general
economic conditions. Food processing companies include manufacturers of packaged
foods and processors of agricultural products. Distributors include food
wholesalers and retailers, supermarket chains and restaurants. The issuers in
the Trust include companies that have successfully adapted to new consumer
demands. We anticipate that continued adaptation will result in consumer support
and lead to continued growth.

Pharmaceutical Industry. Pharmaceutical companies have historically provided
significant growth opportunities. Pharmaceutical companies develop, manufacture
and sell prescription and over-the-counter drugs. They are well known for the
significant amounts of money they spend on research and development. As the
population of the United States ages, pharmaceutical companies will continue to
develop new drugs through advanced technologies and diagnostics. These companies
are involved in the development and distribution of drugs and vaccines
world-wide. These activities may make the pharmaceutical sector attractive for
investors seeking growth.

See "Notes to Portfolios".

NOTES TO PORTFOLIOS

(1) The Securities are initially represented by "regular way" contracts for
the performance of which an irrevocable letter of credit has been deposited with
the Trustee. Contracts to acquire Securities were entered into on October 5,
1998 and have a settlement date of October 8, 1998 (see "The Trusts").
(2) The market value of each Security is based on the closing sale price on
the applicable exchange on the day prior to the Initial Date of Deposit or the
last asked price if not listed on an exchange. Other information regarding the
Securities, as of the Initial Date of Deposit, is as follows:

PROFIT
COST TO (LOSS) TO
SPONSOR SPONSOR
-------------- --------------
The Dow 30 IndexSM Trust $ $
The Dow 30SM & Treasury Trust $ $
Great International Firms Trust $ $
Brand Name Equity Trust $ $

"+" indicates that the stock is held in the form American Depository Receipts or
similar receipts.

(3)Current Dividend Yield for each Security is based on the estimated annual
dividends per share and the Security's market value as of the close of trading
on the day prior to the Initial Date of Deposit. Estimated annual dividends per
share are calculated by annualizing the most recently declared dividends or by
adding the most recent interim and final dividends declared and reflect any
foreign withholding taxes.

THE SECURITIES. A brief description of each of the issuers of the stocks in
each Trust appears below.

THE DOW 30 INDEXSM TRUST AND THE DOW 30SM & TREASURY TRUST

Insert Descriptions Here

GREAT INTERNATIONAL FIRMS TRUST

Insert Descriptions Here

BRAND NAME EQUITY TRUST

Insert Descriptions Here

REPORT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS

To the Board of Directors of Van Kampen Funds Inc. and the Unitholders of Van
Kampen Focus Portfolios, Series 115:

We have audited the accompanying statements of condition and the related
portfolios of Van Kampen Focus Portfolios, Series 115 as of October 6, 1998. The
statements of condition and portfolios are the responsibility of the Sponsor.
Our responsibility is to express an opinion on such financial statements based
on our audit.

We conducted our audit in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. Our procedures included
confirmation of an irrevocable letter of credit deposited to purchase securities
by correspondence with the Trustee. An audit also includes assessing the
accounting principles used and significant estimates made by the Sponsor, as
well as evaluating the overall financial statement presentation.

We believe our audit provides a reasonable basis for our opinion. In our
opinion, the financial statements referred to above present fairly, in all
material respects, the financial position of Van Kampen Focus Portfolios, Series
115 as of October 6, 1998, in conformity with generally accepted accounting
principles.

GRANT THORNTON LLP

Chicago, Illinois
October 6, 1998

<TABLE>
STATEMENTS OF CONDITION
AS OF OCTOBER 6, 1998
<CAPTION>

THE DOW BRAND
THE DOW 30SM & GREAT NAME
30 INDEXSM TREASURY INTERNATIONAL EQUITY
TRUST TRUST FIRMS TRUST TRUST
--------------- --------------- --------------- --------------
<S> <C> <C> <C> <C>
INVESTMENT IN SECURITIES
Contracts to purchase Securities (1) $ $ $ $
--------------- --------------- --------------- --------------
Total $ $ $ $
=============== =============== =============== ==============

LIABILITIES AND INTEREST OF UNITHOLDERS
Liabilities--
Organizational costs (2) $ $ $ $
Deferred sales charge liability (3)
Interest of Unitholders--
Cost to investors (4)
Less: Gross underwriting commission and
organizational costs (2)(4)(5)
--------------- --------------- --------------- --------------
Net interest to Unitholders (4)
--------------- --------------- --------------- --------------
Total $ $ $ $
=============== =============== =============== ==============
</TABLE>

(1)The value of the Securities is determined by Interactive Data Corporation on
the bases set forth under "Public Offering--Offering Price". The contracts
to purchase Securities are collateralized by separate irrevocable letters of
credit which have been deposited with the Trustee.
(2)A portion of the Public Offering Price represents an amount sufficient to
pay for all or a portion of the costs incurred in establishing a Trust. The
amount of these costs are set forth in the "Fee Table." A distribution will
be made as of the close of the initial offering period to an account
maintained by the Trustee from which this obligation of the investors will be
satisfied.
(3)Represents the amount of mandatory distributions from a Trust on the bases
set forth under "Public Offering".
(4)The aggregate public offering price and the aggregate sales charge are
computed on the bases set forth under "Public Offering--Offering Price".
(5)Assumes the maximum sales charge.

THE TRUSTS
- --------------------------------------------------------------------------------

The Trusts were created under the laws of the State of New York pursuant to a
Trust Indenture and Trust Agreement (the "Trust Agreement"), dated the date of
this Prospectus (the "Initial Date of Deposit"), among Van Kampen Funds Inc., as
Sponsor, Van Kampen Investment Advisory Corp., as Supervisor, The Bank of New
York, as Trustee, and American Portfolio Evaluation Services, a division of Van
Kampen Investment Advisory Corp., as Evaluator.

The Trusts offer investors the opportunity to purchase Units representing
proportionate interests in portfolios of actively traded securities. A Trust may
be an appropriate medium for investors who desire to participate in a portfolio
of securities with greater diversification than they might be able to acquire
individually.

On the Initial Date of Deposit, the Sponsor deposited delivery statements
relating to contracts for the purchase of the Securities and an irrevocable
letter of credit in the amount required for these purchases with the Trustee. In
exchange for these contracts the Trustee delivered to the Sponsor documentation
evidencing the ownership of Units of the Trusts. Unless otherwise terminated as
provided in the Trust Agreement, the Trusts will terminate on the Mandatory
Termination Date and any remaining Securities will be liquidated or distributed
by the Trustee within a reasonable time. As used in this Prospectus the term
"Securities" means the securities (including contracts to purchase these
securities) listed in "Portfolio" for each Trust and any additional securities
deposited into each Trust.

Additional Units of a Trust may be issued at any time by depositing in the
Trust (i) additional Securities, (ii) contracts to purchase Securities together
with cash or irrevocable letters of credit or (iii) cash (or a letter of credit)
with instructions to purchase additional Securities. As additional Units are
issued by a Trust, the aggregate value of the Securities will be increased and
the fractional undivided interest represented by each Unit will be decreased.
The Sponsor may continue to make additional deposits into a Trust following the
Initial Date of Deposit provided that the additional deposits will be in amounts
which will maintain, as nearly as practicable, the same percentage relationship
among the number of shares (or percentage of par value) of each Security in the
Trust's portfolio that existed immediately prior to the subsequent deposit.
Investors may experience a dilution of their investments and a reduction in
their anticipated income because of fluctuations in the prices of the Securities
between the time of the deposit and the purchase of the Securities and because
the Trusts will pay the associated brokerage or acquisition fees.

Each Unit of a Trust initially offered represents an undivided interest in
that Trust. To the extent that any Units are redeemed by the Trustee or
additional Units are issued as a result of additional Securities being deposited
by the Sponsor, the fractional undivided interest in that Trust represented by
each unredeemed Unit will increase or decrease accordingly, although the actual
interest in the Trust will remain unchanged. Units will remain outstanding until
redeemed upon tender to the Trustee by Unitholders, which may include the
Sponsor, or until the termination of the Trust Agreement.

Each Trust consists of (a) the Securities (including contracts for the
purchase thereof) listed under the applicable "Portfolio" as may continue to be
held from time to time in the Trust, (b) any additional Securities acquired and
held by the Trust pursuant to the provisions of the Trust Agreement and (c) any
cash held in the related Income and Capital Accounts. Neither the Sponsor nor
the Trustee shall be liable in any way for any failure in any of the Securities.

OBJECTIVES AND SECURITIES SELECTION
- --------------------------------------------------------------------------------

Each Trust seeks to increase the value of your investment by investing in a
diversified portfolio of stocks. The Dow 30SM & Treasury Trust also seeks to
preserve capital by investing a portion of its portfolio in U.S. Treasury
obligations. Both Dow 30SM Trusts also seek to provide dividend income. We
cannot guarantee that a Trust will achieve its objective.

You should note that we applied the selection criteria to the Securities for
inclusion in the Trusts as of the Initial Date of Deposit. After this date, the
Securities may no longer meet the selection criteria. Should a Security no
longer meet the selection criteria, we will generally not remove the Security
from its Trust portfolio. However, we will adjust the portfolio of The Dow 30
IndexSM Trust to reflect changes in the components of the Dow Jones Industrial
AverageSM.

A balanced investment portfolio incorporates various style and capitalization
characteristics. We offer unit trusts with a variety of styles and
capitalizations to meet your needs. We determine style characteristics (growth
or value) based on the criteria used in selecting the Trust portfolio.
Generally, a growth portfolio includes companies in a growth phase of their
business with increasing earnings. A value portfolio generally includes
companies with low relative price-earnings ratios that we believe are
undervalued. We determine market capitalizations as follows based on the
weighted median market capitalization of a portfolio: Small-Cap -- less than $1
billion; Mid-Cap -- $1 billion to $5 billion; and Large-Cap -- over $5 billion.
We determine all style and capitalization characteristics as of the Initial Date
of Deposit and the characteristics may vary thereafter. We will not remove a
Security from a Trust as a result of any change in characteristics.

RISK FACTORS
- --------------------------------------------------------------------------------

PRICE VOLATILITY. The Trusts invest in stocks of U.S. and foreign companies.
The value of Units will fluctuate with the value of these stocks and may be more
or less than the price you originally paid for your Units. The market value of
stocks sometimes moves up or down rapidly and unpredictably. Because the Trusts
are unmanaged, the Trustee will not sell stocks in response to market
fluctuations as is common in managed investments. As with any investment, we
cannot guarantee that the performance of a Trust will be positive over any
period of time.

DIVIDENDS. Stocks represent ownership interests in the issuers and are not
obligations of the issuers. Common stockholders have a right to receive
dividends only after the company has provided for payment of its creditors,
bondholders and preferred stockholders. Common stocks do not assure dividend
payments. Dividends are paid only when declared by an issuer's board of
directors and the amount of any dividend may vary over time.

FOREIGN STOCKS. Because certain Trusts invest in stocks of foreign companies,
they involve additional risks that differ from an investment in domestic stocks.
These risks include the risk of losses due to future political and economic
developments, international trade conditions, foreign withholding taxes and
restrictions on foreign investments and exchange of securities. These Trusts
also involve the risk that fluctuations in exchange rates between the U.S.
dollar and foreign currencies may negatively affect the value of the stocks.
These Trusts involve the risk that information about the stocks is not publicly
available or is inaccurate due to the absence of uniform accounting and
financial reporting standards. In addition, some foreign securities markets are
less liquid than U.S. markets. This could cause a Trust to buy stocks at a
higher price or sell stocks at a lower price than would be the case in a highly
liquid market. Foreign securities markets are often more volatile and involve
higher trading costs than U.S. markets, and foreign companies, securities
markets and brokers are also generally not subject to the same level of
supervision and regulation as in the U.S. Certain stocks may be held in the form
of American Depositary Receipts or other similar receipts ("ADRs"). ADRs
represent receipts for foreign common stock deposited with a custodian (which
may include the Trustee). The ADRs in a Trust trade in the U.S. in U.S. dollars
and are registered with the Securities and Exchange Commission. ADRs generally
involve the same types of risks as foreign common stock held directly. Some ADRs
may experience less liquidity than the underlying common stocks traded in their
home market.

CONSUMER PRODUCTS COMPANIES. The Brand Name Equity Trust primarily includes
issuers within the consumer goods industry. Any negative impact on this industry
will have a greater impact on the value of Units than on a portfolio diversified
over several industries. The companies in this Trust include companies in the
non-durable consumer goods, food and beverage, and pharmaceuticals sectors. You
should understand the risks of these companies before you invest. These
companies face risks due to cyclicality of revenues and earnings, changing
consumer demands, regulatory restrictions, products liability litigation,
extensive competition, foreign tariffs, foreign exchange rates, transportation
costs, the cost of raw materials, unfunded pension fund liabilities and employee
and retiree benefit costs and financial deterioration resulting from leveraged
buy-outs, takeovers or acquisitions. Because the economic health of consumers
greatly impacts these companies, recession or tightening of consumer credit or
spending could adversely affect these issuers. Phamaceutical companies face
additional risks such as extensive governmental regulation, lengthy governmental
drug review processes and substantial research and development costs. The
failure to obtain government approval or successful test results for a drug
could have a substantial negative impact on a company. All of these factors can
have a negative impact on the value of your Units.

TREASURY OBLIGATIONS. The U.S. Treasury obligations in The Dow 30SM &
Treasury Trust are U.S. Treasury Strips. These are bonds that have been stripped
of their unmatured interest coupons. These bonds represent the right to receive
a fixed payment from the U.S. government at the bond's maturity date. These
securities are backed by the full faith and credit of the U.S. government. This
guarantee does not apply to the market value of the Treasury obligations or
Units of the Trust. The U.S. government issues these Treasury obligations at a
deep discount to par value because the obligations do not make periodic interest
payments. In effect, these obligations implicitly reinvest earnings during their
life at a fixed yield. This eliminates the ability to reinvest earnings at
higher rates in the future, if available. The value of the Treasury obligations
may also fluctuate to a greater extent than securities that make regular
interest payments.

PUBLIC OFFERING
- --------------------------------------------------------------------------------

GENERAL. Units are offered at the Public Offering Price which includes the
underlying value of the Securities, the initial sales charge, and cash, if any,
in the Income and Capital Accounts. The "Fee Table" describes the sales charges
in detail. If any deferred sales charge payment date is not a business day, we
will charge the payment on the next business day. If you purchase Units after
the initial deferred sales charge payment, you will only pay that portion of the
payments not yet collected. Beginning on October 6, 1998, the secondary market
sales charge will be 4.00% and will not include deferred payments for any Trust.
This sales charge will decrease by .5% on each following October 6, to a minimum
of 3.00%. The initial offering period sales charge is reduced as follows:

AGGREGATE
DOLLAR AMOUNT
OF UNITS PURCHASED* SALES CHARGE
------------------- ------------
$50,000 - $99,999 4.20%
$100,000 - $249,999 4.00
$250,000 - $499,999 3.50
$500,000 - $999,999 3.00
$1,000,000 or more 2.50

- ---------------
*The breakpoint sales charges are also applied on a Unit basis utilizing a
breakpoint equivalent in the above table of $10 per Unit and will be applied on
whichever basis is more favorable to the investor.

Any sales charge reduction is the responsibility of the selling broker,
dealer or agent. An investor may aggregate purchases of Units of the Trusts for
purposes of qualifying for volume purchase discounts listed above. The reduced
sales charge structure will also apply on all purchases by the same person from
any one dealer of units of Van Kampen-sponsored unit investment trusts which are
being offered in the initial offering period (a) on any one day (the "Initial
Purchase Date") or (b) on any day subsequent to the Initial Purchase Date if the
units purchased are of a unit investment trust purchased on the Initial Purchase
Date. In the event units of more than one trust are purchased on the Initial
Purchase Date, the aggregate dollar amount of such purchases will be used to
determine whether purchasers are eligible for a reduced sales charge. Such
aggregate dollar amount will be divided by the public offering price per unit of
each respective trust purchased to determine the total number of units which
such amount could have purchased of each individual trust. Purchasers must then
consult the applicable trust's prospectus to determine whether the total number
of units which could have been purchased of a specific trust would have
qualified for a reduced sales charge and the amount of such reduction. To
determine the applicable sales charge reduction it is necessary to accumulate
all purchases made on the Initial Purchase Date and all purchases made in
accordance with (b) above. Units purchased in the name of the spouse of a
purchaser or in the name of a child of such purchaser ("immediate family
members") will be deemed to be additional purchases by the purchaser for the
purposes of calculating the applicable sales charge. The reduced sales charges
will also be applicable to a trustee or other fiduciary purchasing securities
for one or more trust estate or fiduciary accounts.

Units may be purchased in the primary or secondary market at the Public
Offering Price less the concession the Sponsor typically allows to brokers and
dealers for purchases by (1) investors who purchase Units through registered
investment advisers, certified financial planners and registered broker-dealers
who in each case either charge periodic fees for financial planning, investment
advisory or asset management service, or provide such services in connection
with the establishment of an investment account for which a comprehensive "wrap
fee" charge is imposed, (2) bank trust departments investing funds over which
they exercise exclusive discretionary investment authority and that are held in
a fiduciary, agency, custodial or similar capacity, (3) any person who for at
least 90 days, has been an officer, director or bona fide employee of any firm
offering Units for sale to investors or their immediate family members (as
described above) and (4) officers and directors of bank holding companies that
make Units available directly or through subsidiaries or bank affiliates.
Notwithstanding anything to the contrary in this Prospectus, such investors,
bank trust departments, firm employees and bank holding company officers and
directors who purchase Units through this program will not receive sales charge
reductions for quantity purchases.

A purchaser desiring to purchase during a 13 month period $500,000 or more of
any combination of series of Van Kampen unit investment trusts may qualify for a
reduced sales charge by signing a nonbinding Letter of Intent with any single
broker-dealer. After signing a Letter of Intent, at the date total purchases,
less redemptions, of units of any combination of series of Van Kampen unit
investment trusts by a purchaser (including units purchased in the name of the
spouse of a purchaser or in the name of a child of such purchaser under 21 years
of age) exceed $500,000, the selling broker-dealer, bank or other will credit
the unitholder with cash as a retroactive reduction of the sales charge on such
units equal to the amount which would have been paid for the total aggregated
sales amount. If a purchase does not complete the required purchases under the
Letter of Intent within the 13 month period, no such retroactive sales charge
reduction shall be made.

During the initial offering period, unitholders of any Van Kampen-sponsored
unit investment trust may utilize their redemption or termination proceeds to
purchase Units of all Trusts at the Public Offering Price per Unit less 1%.

Employees, officers and directors (including their spouses, children,
grandchildren, parents, grandparents, siblings, mothers-in-law, fathers-in-law,
sons-in-law, daughters-in-law, and trustees, custodians or fiduciaries for the
benefit of such persons) of the Van Kampen Funds Inc. and its affiliates,
dealers and their affiliates and vendors providing services to the Sponsor may
purchase Units at the Public Offering Price less the applicable dealer
concession.

The minimum purchase is 100 Units (25 Units for retirement accounts) but may
vary by selling firm. However, in connection with fully disclosed transactions
with the Sponsor, the minimum purchase requirement will be that number of Units
set forth in the contract between the Sponsor and the related broker or agent.

OFFERING PRICE. The Public Offering Price of Units will vary from the amounts
stated under "Summary of Essential Financial Information" in accordance with
fluctuations in the prices of the underlying Securities in the Trusts. The
initial price of the Securities was determined by Interactive Data Corporation,
a firm regularly engaged in the business of evaluating, quoting or appraising
comparable securities. The Evaluator will generally determine the value of the
Securities as of the Evaluation Time on each business day and will adjust the
Public Offering Price of Units accordingly. This Public Offering Price will be
effective for all orders received prior to the Evaluation Time on each business
day. The Evaluation Time is the close of the New York Stock Exchange on each
Trust business day. Orders received by the Trustee or Sponsor for purchases,
sales or redemptions after that time, or on a day which is not a business day,
will be held until the next determination of price. The term "business day", as
used herein and under "Rights of Unitholders--Redemption of Units", excludes
Saturdays, Sundays and holidays observed by the New York Stock Exchange.

The aggregate underlying value of the equity securities in a Trust during the
initial offering period is determined on each business day by the Evaluator in
the following manner: If the equity securities are listed on a national or
foreign securities exchange, this evaluation is generally based on the closing
sale prices on that exchange (unless it is determined that these prices are
inappropriate as a basis for valuation) or, if there is no closing sale price on
that exchange, at the closing ask prices. If the equity securities are not
listed on a national or foreign securities exchange or, if so listed and the
principal market therefor is other than on the exchange, the evaluation shall
generally be based on the current ask price on the over-the-counter market
(unless it is determined that these prices are inappropriate as a basis for
evaluation). If current ask prices are unavailable, the evaluation is generally
determined (a) on the basis of current ask prices for comparable securities, (b)
by appraising the value of the equity securities on the ask side of the market
or (c) by any combination of the above. The aggregate underlying value of U.S.
Treasury obligations during the initial offering period is determined on each
business day by the Evaluator based on their net offering prices. If net
offering prices are unavailable, then the evaluations will be based on (1)
offering prices for comparable securities, (2) by determining the value of the
obligations on the offer side of the market or (3) by any combination of the
above. The value of any foreign securities is based on the applicable currency
exchange rate as of the Evaluation Time. The value of the Securities for
purposes of secondary market transactions and redemptions is described under
"Rights of Unitholders--Redemption of Units".

In offering the Units to the public, neither the Sponsor nor any
broker-dealers are recommending any of the individual Securities but rather the
entire pool of Securities in a Trust, taken as a whole, which are represented by
the Units.

UNIT DISTRIBUTION. Units will be distributed to the public by the Sponsor,
broker-dealers and others at the Public Offering Price. Units repurchased in the
secondary market, if any, may be offered by this Prospectus at the secondary
market Public Offering
Price in the manner described above.

The Sponsor intends to qualify Units for sale in a number of states. Brokers,
dealers and others will be allowed a concession or agency commission in
connection with the distribution of Units during the initial offering period of
3.20% of the Public Offering Price. Volume concession or agency commissions of
any additional .30% will be given to an broker-dealer who purchases from the
Sponsor at least $100,000 (or 10,000 Units) on the Initial Date of Deposit or
$250,000 (or 25,000 Units) on any day after that date.

In addition to the amounts above, during the initial offering period any firm
that distributes 500,000 - 999,999 Units of a Trust will receive additional
compensation of $.005 per Unit; any firm that distributes 1,000,000 - 1,999,999
Units of such Trust will receive additional compensation of $.01 per Unit; any
firm that distributes 2,000,000 - 2,999,999 Units of such Trust will receive
additional compensation of $.015 per Unit; any firm that distributes 3,000,000
Units or more of such Trust will receive additional compensation of $.02 per
Unit. This additional compensation will be paid by the Sponsor out of its own
assets at the end of the initial offering period.

Any discount provided to investors will be borne by the selling dealer or
agent as indicated under "General" above. For transactions involving unitholders
of other Van Kampen unit investment trusts who use their redemption or
termination proceeds to purchase Units of the Trusts, the total concession or
agency commission will amount to 2.25% per Unit. For all secondary market
transactions the total concession or agency commission will amount to 70% of the
sales charge. Notwithstanding anything to the contrary herein, in no case shall
the total of any concessions, agency commissions and any additional compensation
allowed or paid to any broker, dealer or other distributor of Units with respect
to any individual transaction exceed the total sales charge applicable to such
transaction. The Sponsor reserves the right to reject, in whole or in part, any
order for the purchase of Units and to change the amount of the concession or
agency commission to dealers and others from time to time.

Broker-dealers of the Trusts, banks and/or others may be eligible to
participate in a program in which such firms receive from the Sponsor a nominal
award for each of their representatives who have sold a minimum number of units
of unit investment trusts created by the Sponsor during a specified time period.
In addition, at various times the Sponsor may implement other programs under
which the sales forces of brokers, dealers, banks and/or others may be eligible
to win other nominal awards for certain sales efforts, or under which the
Sponsor will reallow to such brokers, dealers, banks and/or others that sponsor
sales contests or recognition programs conforming to criteria established by the
Sponsor, or participate in sales programs sponsored by the Sponsor, an amount
not exceeding the total applicable sales charges on the sales generated by such
persons at the public offering price during such programs. Also, the Sponsor in
its discretion may from time to time pursuant to objective criteria established
by the Sponsor pay fees to qualifying entities for certain services or
activities which are primarily intended to result in sales of Units of the
Trusts. Such payments are made by the Sponsor out of its own assets, and not out
of the assets of any Trust. These programs will not change the price Unitholders
pay for their Units or the amount that a Trust will receive from the Units sold.

SPONSOR COMPENSATION. The Sponsor will receive a gross sales commission equal
to the total sales charge applicable to each transaction. Any sales charge
discount provided to investors will be borne by the selling dealer or agent. In
addition, the Sponsor will realize a profit or loss as a result of the
difference between the price paid for the Securities by the Sponsor and the cost
of the Securities to each Trust on the Initial Date of Deposit as well as on
subsequent deposits. See "Notes to Portfolios". The Sponsor has not participated
as sole underwriter or as manager or as a member of the underwriting syndicates
or as an agent in a private placement for any of the Securities. The Sponsor may
realize profit or loss as a result of the possible fluctuations in the market
value of the Securities, since all proceeds received from purchasers of Units
are retained by the Sponsor. In maintaining a secondary market, the Sponsor will
realize profits or losses in the amount of any difference between the price at
which Units are purchased and the price at which Units are resold (which price
includes the applicable sales charge) or from a redemption of repurchased Units
at a price above or below the purchase price. Cash, if any, made available to
the Sponsor prior to the date of settlement for the purchase of Units may be
used in the Sponsor's business and may be deemed to be a benefit to the Sponsor,
subject to the limitations of the Securities Exchange Act of 1934.

An affiliate of the Sponsor may have participated in a public offering of one
or more of the Securities. The Sponsor, an affiliate or their employees may have
a long or short position in these Securities or related securities. An affiliate
may act as a specialist or market maker for these Securities. An officer,
director or employee of the Sponsor or an affiliate may be an officer or
director for issuers of the Securities.

MARKET FOR UNITS. Although it is not obligated to do so, the Sponsor
currently intends to maintain a market for Units and to purchase Units at the
secondary market repurchase price (which is described under "Right of
Unitholders--Redemption of Units"). The Sponsor may discontinue purchases of
Units or discontinue purchases at this price at any time. In the event that a
secondary market is not maintained, a Unitholder will be able to dispose of
Units by tendering them to the Trustee for redemption at the Redemption Price.
See "Rights of Unitholders--Redemption of Units". Unitholders should contact
their broker to determine the best price for Units in the secondary market.
Units sold prior to the time the entire deferred sales charge has been collected
will be assessed the amount of any remaining deferred sales charge at the time
of sale. The Trustee will notify the Sponsor of any tendered of Units for
redemption. If the Sponsor's bid in the secondary market equals or exceeds the
Redemption Price per Unit, it may purchase the Units not later than the day on
which Units would have been redeemed by the Trustee. The Sponsor may sell
repurchased Units at the secondary market Public Offering Price per Unit.

TAX-SHELTERED RETIREMENT PLANS. Units are available for purchase in
connection with certain types of tax-sheltered retirement plans, including
Individual Retirement Accounts for the individuals, Simplified Employee Pension
Plans for employees, qualified plans for self-employed individuals, and
qualified corporate pension and profit sharing plans for employees. The minimum
purchase for these accounts is reduced to 25 Units but may vary by selling firm.
The purchase of Units may be limited by the plans' provisions and does not
itself establish such plans.

RIGHTS OF UNITHOLDERS
- --------------------------------------------------------------------------------

DISTRIBUTIONS. Dividends and any net proceeds from the sale of Securities
received by a Trust will be distributed to Unitholders on each Distribution Date
to Unitholders of record on the preceding Record Date. These dates are listed
under "Summary of Essential Financial Information". A person becomes a
Unitholder of record on the date of settlement (generally three business days
after Units are ordered). Unitholders may elect to receive distributions in cash
or to have distributions reinvested into additional Units. Distributions may
also be reinvested into Van Kampen mutual funds. See "Rights of
Unitholders--Reinvestment Option".

Dividends received by a Trust are credited to the Income Account of the
Trust. Other receipts (e.g., capital gains, proceeds from the sale of
Securities, etc.) are credited to the Capital Account. Proceeds received on the
sale of any Securities, to the extent not used to meet redemptions of Units or
pay deferred sales charges, fees or expenses, will be distributed to
Unitholders. Proceeds received from the disposition of any Securities after a
record date and prior to the following distribution date will be held in the
Capital Account and not distributed until the next distribution date. Any
distribution to Unitholders consists of each Unitholder's pro rate share of the
available cash in the Income and Capital Accounts as of the related Record Date.

REINVESTMENT OPTION. Unitholders may have distributions automatically
reinvested in additional Units under the Automatic Reinvestment Option (to the
extent Units may be lawfully offered for sale in the state in which the
Unitholder resides) through two options. Brokers and dealers can use the
Dividend Reinvestment Service through Depository Trust Company or purchase the
Automatic Reinvestment Option CUSIP. Unitholders will be subject to any
remaining deferred sales charge payments due on Units. To participate in this
reinvestment option, a Unitholder must file with the Trustee a written notice of
election, together with any certificate representing Units and other
documentation that the Trustee may then require, at least five days prior to the
related Record Date. A Unitholder's election will apply to all Units owned by
the Unitholder and will remain in effect until changed by the Unitholder. If
Units are unavailable for reinvestment, distributions will be paid in cash.
Purchases of additional Units made pursuant to the reinvestment plan will be
made at the net asset value for Units as of the Evaluation Time on the
Distribution Date.

In addition, under the Guaranteed Reinvestment Option Unitholders may elect
to have distributions automatically reinvested in certain Van Kampen mutual
funds (the "Reinvestment Funds"). Each Reinvestment Fund has investment
objectives which differ from those of the Trusts. The prospectus relating to
each Reinvestment Fund describes its investment policies and how to begin
reinvestment. A Unitholder may obtain a prospectus for the Reinvestment Funds
from the Sponsor. Purchases of shares of a Reinvestment Fund will be made at a
net asset value computed on the Distribution Date. Unitholders with an existing
Guaranteed Reinvestment Option account (whereby a sales charge is imposed on
distribution reinvestments) may transfer their existing account into a new
account which allows purchases of Reinvestment Fund shares at net asset value.

A participant may elect to terminate his or her reinvestment plan and
receive future distributions in cash by notifying the Trustee in writing no
later than five days before a distribution date. The Sponsor, each Reinvestment
Fund, and its investment adviser shall have the right to suspend or terminate
these reinvestment plans at any time.

REDEMPTION OF UNITS. A Unitholder may redeem all or a portion of his Units by
tender to the Trustee at its Unit Investment Trust Division, 101 Barclay Street,
20th Floor, New York, New York 10286. Certificates must be tendered to the
Trustee, duly endorsed or accompanied by proper instruments of transfer with
signature guaranteed (or by providing satisfactory indemnity in connection with
lost, stolen or destroyed certificates) and by payment of applicable
governmental charges, if any. On the seventh day following the tender, the
Unitholder will be entitled to receive in cash an amount for each Unit equal to
the Redemption Price per Unit next computed on the date of tender. The "date of
tender" is deemed to be the date on which Units are received by the Trustee,
except that with respect to Units received by the Trustee after the Evaluation
Time or on a day which is not a Trust business day, the date of tender is deemed
to be the next business day.

Unitholders tendering 1,000 or more Units of a Trust for redemption may
request an in kind distribution of equity securities equal to the Redemption
Price per Unit on the date of tender. Trusts generally do not offer in kind
distributions of portfolio securities that are held in foreign markets or U.S.
Treasury obligations. An in kind distribution will be made by the Trustee
through the distribution of each of the equity securities in book-entry form to
the account of the Unitholder's broker-dealer at Depository Trust Company.
Amounts representing fractional shares or U.S. Treasury obligations will be
distributed in cash. The Trustee may adjust the number of shares of any Security
included in a Unitholder's in kind distribution to facilitate the distribution
of whole shares.

The Trustee may sell Securities to satisfy Unit redemptions. To the extent
that Securities are redeemed in kind or sold, the size of a Trust will be, and
the diversity of a Trust may be, reduced. Sales may be required at a time when
Securities would not otherwise be sold and may result in lower prices than might
otherwise be realized. The price received upon redemption may be more or less
than the amount paid by the Unitholder depending on the value of the Securities
at the time of redemption. Special federal income tax consequences will result
if a Unitholder requests an in kind distribution. See "Taxation".

The Redemption Price per Unit and the secondary market repurchase price per
Unit are equal to the pro rate share of each Unit in each Trust determined on
the basis of (i) the cash on hand in the Trust, (ii) the value of the Securities
in the Trust and (iii) dividends receivable on the Securities in the Trust
trading ex-dividend as of the date of computation, less (a) amounts representing
taxes or other governmental charges payable out of the Trust, (b) the accrued
expenses of the Trust and (c) any unpaid deferred sales charge payments. During
the initial offering period, the redemption price and the secondary market
repurchase price will also include estimated organizational costs. For these
purposes, the Evaluator may determine the value of equity securities in the
following manner: If the equity securities are listed on a national or foreign
securities exchange, this evaluation is generally based on the closing sale
prices on that exchange (unless it is determined that these prices are
inappropriate as a basis for valuation) or, if there is no closing sale price on
that exchange, at the closing bid prices. If the equity securities are not so
listed or, if so listed and the principal market therefore is other than on the
exchange, the evaluation may be based on the current bid price on the
over-the-counter market. If current bid prices are unavailable or inappropriate,
the evaluation may be determined (a) on the basis of current bid prices for
comparable securities, (b) by appraising the equity securities on the bid side
of the market or (c) by any combination of the above. The Evaluator may
determine the value of U.S. Treasury obligations for these purposes in the same
manner as described under "Public Offering--Offering Price" on the bid side of
the market. The value of any foreign securities is based on the applicable
currency exchange rate as of the Evaluation Time.

The right of redemption may be suspended and payment postponed for any period
during which the New York Stock Exchange is closed, other than for customary
weekend and holiday closings, or any period during which the SEC determines that
trading on that Exchange is restricted or an emergency exists, as a result of
which disposal or evaluation of the Securities is not reasonably practicable, or
for other periods as the SEC may permit.

CERTIFICATES. Ownership of Units is evidenced by certificates unless a
Unitholder makes a written request to the Trustee that ownership be in book
entry form. Units are transferable by making a written request to the Trustee
and, in the case of Units in certificate form, by presentation of the
certificate to the Trustee properly endorsed or accompanied by a written
instrument or instruments of transfer. A Unitholder must sign the written
request, and certificate or transfer instrument, exactly as his name appears on
the records of the Trustee and on the face of any certificate with the signature
guaranteed by a participant in the Securities Transfer Agents Medallion Program
("STAMP") or a signature guarantee program accepted by the Trustee. In certain
instances the Trustee may require additional documents such as, but not limited
to, trust instruments, certificates of death, appointments as executor or
administrator or certificates of corporate authority. Fractional certificates
will not be issued. The Trustee may require a Unitholder to pay a reasonable fee
for each certificate reissued or transferred and to pay any governmental charge
that may be imposed in connection with each transfer or interchange. Destroyed,
stolen, mutilated or lost certificates will be replaced upon delivery to the
Trustee of satisfactory indemnity, evidence of ownership and payment of expenses
incurred. Mutilated certificates must be surrendered to the Trustee for
replacement.

REPORTS PROVIDED. Unitholders will receive a statement of dividends and other
amounts received by a Trust for each distribution. Within a reasonable time
after the end of each year, each person who was a Unitholder during that year
will receive a statement describing dividends and capital received, actual Trust
distributions, Trust expenses, a list of the Securities and other Trust
information. Unitholders may obtain the Evaluator's evaluations of the
Securities upon request.

TRUST ADMINISTRATION
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PORTFOLIO ADMINISTRATION. The Trusts are not managed funds and, except as
provided in the Trust Agreement, Securities generally will not be sold or
replaced. The Sponsor may, however, direct that Securities be sold in certain
limited circumstances to protect the Trust based on advice from the Supervisor.
These situations may include events such as the issuer having defaulted on
payment of any of its outstanding obligations or the price of a Security has
declined to such an extent or other credit factors exist so that in the opinion
of the Sponsor retention of the Security would be detrimental to the Trust. In
addition, the Trustee may sell Securities to redeem Units or pay Trust expenses
or deferred sales charges. The Trustee must reject any offer for securities or
property in exchange for the Securities. If securities or property are
nonetheless acquired by a Trust, the Sponsor may direct the Trustee to sell the
securities or property and distribute the proceeds to Unitholders or to accept
the securities or property for deposit in the Trust. Should any contract for the
purchase of any of the Securities fail, the Sponsor will (unless substantially
all of the moneys held in the Trust to cover the purchase are reinvested in
substitute Securities in accordance with the Trust Agreement) refund the cash
and sales charge attributable to the failed contract to all Unitholders on or
before the next distribution date.

With respect to The Dow 30 IndexSM Trust, purchases and sales of Securities
will generally be made in an effort to maintain, to the extent practical, a
portfolio that reflects the current components of the Dow Jones Industrial
AverageSM. If this Trust receives any securities or other property relating to
the Securities in the Trust (such as those acquired in a merger or spin-off),
the Trustee will sell the securities or other property and reinvest the proceeds
in shares of the Security related to the transaction. If a Security is removed
from the Dow Jones Industrial AverageSM, the Trustee will sell the Security and
may reinvest the proceeds into any new securities added as components of the Dow
Jones Industrial AverageSM or into the other Securities if a new component is
not added.

With respect to The Dow 30 IndexSM Trust and Great International Firms Trust,
the Sponsor may direct the reinvestment of proceeds of the sale of Securities if
the sale is the direct result of serious adverse credit factors which, in the
opinion of the Sponsor, would make retention of the Securities detrimental to
the Trust. In such as case, the Sponsor may, but is not obligated to, direct the
reinvestment of sale proceeds in any other securities that meet the criteria for
inclusion in these Trusts on the Initial Date of Deposit. The Sponsor may also
instruct the Trustee to take action necessary to ensure that these Trusts
continue to satisfy the qualifications of a regulated investment company and to
avoid imposition of tax on undistributed income of these Trusts.

To the extent practicable, the Supervisor may (but is not obligated to)
designate Securities to be sold by the Trustee in order to maintain the
proportionate relationship among the number of shares of individual issues of
Securities in a Trust. To the extent this is not practicable, the composition
and diversity of the Securities in the Trust may be altered. In order to obtain
the best price for a Trust, it may be necessary for the Supervisor to specify
minimum amounts (generally 100 shares) in which blocks of Securities are to be
sold. In effecting purchases and sales of a Trust's portfolio securities, the
Sponsor may direct that orders be placed with and brokerage commissions be paid
to brokers, including brokers which may be affiliated with the Trusts, the
Sponsor or dealers participating in the offering of Units. In addition, in
selecting among firms to handle a particular transaction, the Sponsor may take
into account whether the firm has sold or is selling units of unit investment
trusts which is sponsors.

AMENDMENT OF THE TRUST AGREEMENT. The Trustee and the Sponsor may amend the
Trust Agreement without the consent of Unitholders to correct any provision
which may be defective or to make other provisions that will not adversely
affect Unitholders (as determined in good faith by the Sponsor and the Trustee).
The Trust Agreement may not be amended to increase the number of Units or permit
acquisition of securities in addition to or substitution for the Securities
(except as provided in the Trust Agreement). The Trustee will notify Unitholders
of any amendment.

TERMINATION. Each Trust will terminate on the Mandatory Termination Date or
upon the sale or other disposition of the last Security held in the Trust. A
Trust may be terminated at any time with consent of Unitholders representing
two-thirds of the outstanding Units or by the Trustee when the value of the
Trust is less than $500,000 ($3,000,000 if the value of the Trust has exceeded
$15,000,000) (the "Minimum Termination Value"). Unitholders will be notified of
any termination. The Trustee may begin to sell Securities in connection with a
Trust termination nine business days before, and no later than, the Mandatory
Termination Date. Approximately thirty days before this date, the Trustee will
notify Unitholders of the termination and provide a form enabling qualified
Unitholders to elect an in kind distribution of Securities. See "Rights of
Unitholders--Redemption of Units". This form must be returned at least five
business days prior to the Mandatory Termination Date. Unitholders will receive
a final cash distribution within a reasonable time after the Mandatory
Termination Date (unless the Unitholder has elected an in kind distribution or
is a participant in the final Rollover). All distributions will be net of Trust
expenses and costs. Unitholders will receive a final distribution statement
following termination. The Information Supplement contains further information
regarding termination of the Trusts. See "Additional Information".

LIMITATIONS ON LIABILITIES. The Sponsor, Evaluator, Supervisor and Trustee
are under no liability for taking any action or for refraining from taking any
action in good faith pursuant to the Trust Agreement, or for errors in judgment,
but shall be liable only for their own willful misfeasance, bad faith or gross
negligence (negligence in the case of the Trustee) in the performance of their
duties or by reason of their reckless disregard of their obligations and duties
hereunder. The Trustee is not be liable for depreciation or loss incurred by
reason of the sale by the Trustee of any of the Securities. In the event of the
failure of the Sponsor to act under the Trust Agreement, the Trustee may act
thereunder and is not be liable for any action taken by it in good faith under
the Trust Agreement. The Trustee is not liable for any taxes or other
governmental charges imposed on the Securities, on it as Trustee under the Trust
Agreement or on a Trust which the Trustee may be required to pay under any
present or future law of the United States of America or of any other taxing
authority having jurisdiction. In addition, the Trust Agreement contains other
customary provisions limiting the liability of the Trustee. The Trustee, Sponsor
and Supervisor may rely on any evaluation furnished by the Evaluator and have no
responsibility for the accuracy thereof. Determinations by the Evaluator shall
be made in good faith upon the basis of the best information available to it.

SPONSOR. Van Kampen Funds Inc., a Delaware corporation, is the Sponsor of
the Trust. The Sponsor is an indirect subsidiary of Morgan Stanley Dean Witter &
Co. Van Kampen Funds Inc. specializes in the underwriting and distribution of
unit investment trusts and mutual funds with roots in money management dating
back to 1926. The Sponsor is a member of the National Association of Securities
Dealers, Inc. and has offices at One Parkview Plaza, Oakbrook Terrace, Illinois
60181, (630) 684-6000 and 2800 Post Oak Boulevard, Houston, Texas 77056, (713)
993-0500. As of November 30, 1997, the total stockholders' equity of Van Kampen
Funds Inc. was $132,381,000 (audited). The Information Supplement contains
additional information about the Sponsor.

If the Sponsor shall fail to perform any of its duties under the Trust
Agreement or become incapable of acting or shall become bankrupt or its affairs
are taken over by public authorities, then the Trustee may (i) appoint a
successor Sponsor at rates of compensation deemed by the Trustee to be
reasonable and not exceeding amounts prescribed by the Securities and Exchange
Commission, (ii) terminate the Trust Agreement and liquidate the Trusts as
provided therein or (iii) continue to act as Trustee without terminating the
Trust Agreement.

TRUSTEE. The Trustee is The Bank of New York, a trust company organized under
the laws of New York. The Bank of New York has its unit investment trust
division offices at 101 Barclay Street, New York, New York 10286 (800) 221-7668.
The Bank of New York is subject to supervision and examination by the
Superintendent of Banks of the State of New York and the Board of Governors of
the Federal Reserve System, and its deposits are insured by the Federal Deposit
Insurance Corporation to the extent permitted by law. Additional information
regarding the Trustee is set forth in the Information Supplement, including the
Trustee's qualifications and duties, its ability to resign, the effect of a
merger involving the Trustee and the Sponsor's ability to remove and replace the
Trustee. See "Additional Information".

PERFORMANCE INFORMATION. The Sponsor may from time to time in its advertising
and sales materials compare the then current estimated returns on the Trusts and
returns over specified time periods on other trusts (which may show performance
net of expenses and charges which the Trusts would have charged) with returns on
other taxable investments such as the common stocks comprising the Dow Jones
Industrial Average, the S&P 500, other investment indices, corporate or U.S.
government bonds, bank CDs, money market accounts or money market funds, or with
performance data from Lipper Analytical Services, Inc., Morningstar
Publications, Inc. or various publications, each of which has characteristics
that may differ from those of the Trusts. Information on percentage changes in
the dollar value of Units may be included from time to time in advertisements,
sales literature, reports and other information furnished to current or
prospective Unitholders. Total return figures may not be averaged and may not
reflect deduction of the sales charge, which would decrease return. No provision
is made for any income taxes payable. Past performance may not be indicative of
future results. The Trust portfolios are not managed and Unit price and return
fluctuate with the value of common stocks in the portfolios, so there may be a
gain or loss when Units are sold. As with other performance data, performance
comparisons should not be considered representative of the Trust's relative
performance for any future period.

TAXATION
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THE DOW 30 INDEXSM TRUST AND GREAT INTERNATIONAL FIRMS TRUST. The Dow 30
IndexSM Trust and Great International Firms Trust intend to elect and qualify on
a continuing basis for special federal income tax treatment as a "regulated
investment company" under the Internal Revenue Code of 1986, as amended (the
"Code"). If a Trust so qualifies and timely distributes to Unitholders 90% or
more of its taxable income (without regard to its net capital gain, i.e., the
excess of its net long-term capital gain over its net short-term capital loss),
it will not be subject to federal income tax on the portion of its taxable
income (including any net capital gain) that it distributes to Unitholders. In
addition, to the extent a Trust timely distributes to Unitholders at least 98%
of its taxable income (including any net capital gain), it will not be subject
to the 4% excise tax on certain undistributed income of "regulated investment
companies." Because the Trusts intend to timely distribute its taxable income
(including any net capital gain), it is anticipated that the Trusts will not be
subject to federal income tax or the excise tax.

Distributions to Unitholders of the Trust's taxable income, other than
distributions which are designated as capital gain dividends, will be taxable as
ordinary income to Unitholders, except that to the extent that distributions to
a Unitholder in any year exceed the Trust's current and accumulated earnings and
profits, they will be treated as a return of capital and will reduce the
Unitholder's basis in his Units and, to the extent that they exceed his basis,
will be treated as a gain from the sale of his Units as discussed below.

Although distributions generally will be treated as distributed when paid,
distributions declared in October, November or December payable to Unitholders
of record on a specified date in one of those months and paid during January of
the following year will be treated as having been distributed by the Trust (and
received by the Unitholder) on December 31 of the year such distributions are
declared.

Distributions of the Trust's net capital gain which are properly designated
as capital gain dividends by the Trust will be taxable to Unitholders as
long-term capital gain, regardless of the length of time the Units have been
held by a Unitholder. A Unitholder may recognize a taxable gain or loss if the
Unitholder sells or redeems his Units. Any gain or loss arising from (or treated
as arising from) the sale or redemption of Units will generally be a capital
gain or loss, except in the case of a dealer or a financial institution. The
Taxpayer Relief Act of 1997 (the "1997 Act") provides that for taxpayers other
than corporations, net capital gain (which is defined as net long-term capital
gains over net short-term capital loss for the taxable year) is subject to a
maximum marginal stated tax rate of either 28% or 20%, depending upon the
holding periods of the capital assets. Capital gain or loss is long-term if the
holding period for the asset is more than one year, and is short-term if the
holding period for the asset is one year or less. The date on which a Unit is
acquired (i.e., the "trade date") is excluded for purposes for determining the
holding period of the Unit. Generally, capital gains realized from assets held
for more than one year but not more than 18 months are taxed at a maximum
marginal stated tax rate of 28% and capital gains realized from assets (with
certain exclusions) held for more than 18 months are taxed at a maximum marginal
stated tax rate of 20% (10% in the case of certain taxpayers in the lowest tax
bracket). Further, capital gains realized from assets held for one year or less
are taxed at the same rates as ordinary income. Legislation is currently pending
that provides the appropriate methodology that should be applied in netting the
realized capital gains and losses. Such legislation is proposed to be effective
retroactively for tax years ending after May 6, 1997. Note, however, that the
1997 Act provides that the application of the rules described above in the case
of pass-through entities such as the Trust will be prescribed in future Treasury
Regulations. The Internal Revenue Service has released preliminary guidance
which provides that, in general, pass-through entities such as the Trust may
designate their capital gains dividends as either a 20% rate gain distribution
or a 28% rate gain distribution, depending on the nature of the gain received by
the pass-through entity. Unitholders should consult their own tax advisors as to
the tax rate applicable to capital gain dividends. Note also that legislation is
currently pending under which net capital gain realized from property (with
certain exclusions) held for more than one year (rather than more than 18
months) would be taxed at the maximum marginal stated tax rate of 20% (10% for
certain taxpayers) provided by the 1997 Act. Such legislation is proposed to be
effective retroactively for amounts properly taken into account on or after
January 1, 1998. Additionally, note that if a Unitholder holds Units for six
months or less and subsequently sells such Units at a loss, the loss will be
treated as a long-term capital loss to the extent that any long-term capital
gain distribution is made with respect to such Units during the six-month period
or less that the Unitholder owns the Units.

In addition, please note that capital gains may be recharacterized as
ordinary income in the case of certain financial transactions that are
considered "conversion transactions" effective for transactions entered into
after April 30, 1993. Unitholders and prospective investors should consult with
their tax advisers regarding the potential effect of this provision on their
investment in Units. The 1997 Act includes provisions that treat certain
transactions designed to reduce or eliminate risk of loss and opportunities for
gain (e.g. short sales, offsetting notional principal contracts, futures or
forward contracts or similar transactions) as constructive sales for purposes of
recognition of gain (but not loss) and for purposes of determining the holding
period.

Generally, the tax basis of a Unitholder includes sales charges, and such
charges are not deductible. A portion of the sales charge for the Trust is
deferred. It is possible that for federal income tax purposes a portion of the
deferred sales charge may be treated as interest which would be deductible by a
Unitholder subject to limitations on the deduction of investment interest. In
such case, the non-interest portion of the deferred sales charge would be added
to the Unitholder's tax basis in his Units. In any case the income (or proceeds
from redemption) a Unitholder must take into account for federal income tax
purposes is not reduced by amounts deducted to pay the deferred sales charge.

Distributions which are taxable as ordinary income to Unitholders will
constitute dividends for federal income tax purposes. To the extent dividends
received by the Trust are attributable to foreign corporations, a corporation
that owns Units will not be entitled to the dividends received deduction with
respect to its pro rata portion of such dividends, since the dividends received
deduction is generally available only with respect to dividends paid by domestic
corporations. The Trust will provide each Unitholder with information annually
concerning what part of the Trust distributions are eligible for the dividends
received deduction.

The Trust may elect to pass through to the Unitholders the foreign income and
similar taxes paid by the Trust in order to enable such Unitholders to take a
credit (or deduction) for foreign income taxes paid by the Trust. If such an
election is made, Unitholders of the Trust, because they are deemed to own a pro
rata portion of the foreign securities held by the Trust, must include in their
gross income, for federal income tax purposes, both their portion of dividends
received by the Trust and also their portion of the amount which the Trust deems
to be the Unitholders' portion of foreign income taxes paid with respect to, or
withheld from, dividends, interest or other income of the Trust from its foreign
investments. Unitholders may then subtract from their federal income tax the
amount of such taxes withheld, or else treat such foreign taxes as deductions
from gross income; however, as in the case of investors receiving income
directly from foreign sources, the above described tax credit or deduction is
subject to certain limitations. The 1997 Act imposes a required holding period
for such credits. Unitholders should consult their tax advisers regarding this
election and its consequences to them.

Under the Code, certain miscellaneous itemized deductions, such as investment
expenses, tax return preparation fees and employee business expenses, will be
deductible by individuals only to the extent they exceed 2% of adjusted gross
income. Miscellaneous itemized deductions subject to this limitation under
present law do not include expenses incurred by the Trust so long as the Units
are held by or for 500 or more persons at all times during the taxable year or
another exception is met. In the event the Units are held by fewer than 500
persons, additional taxable income may be realized by the individual (and other
noncorporate) Unitholders in excess of the distributions received from the
Trust.

Distributions reinvested into additional Units of the Trust will be taxed to
a Unitholder in the manner described above (i.e., as ordinary income, long-term
capital gain or as a return of capital).

The federal tax status of each year's distributions will be reported to
Unitholders and to the Internal Revenue Service. Each Unitholder will be
requested to provide the Unitholder's taxpayer identification number to the
Trustee and to certify that the Unitholder has not been notified that payments
to the Unitholder are subject to back-up withholding. If the proper taxpayer
identification number and appropriate certification are not provided when
requested, distributions by the Trust to such Unitholder (including amounts
received upon the redemption of Units) will be subject to back-up withholding.

The foregoing discussion relates only to the federal income tax status of the
Trust and to the tax treatment of distributions by the Trust to United States
Unitholders.

A Unitholder who is a foreign investor (i.e., an investor other than a United
States citizen or resident or a United States corporation, partnership, estate
or trust) should be aware that, generally, subject to applicable tax treaties,
distributions from the Trust which constitute dividends for Federal income tax
purposes (other than dividends which the Trust designates as capital gain
dividends) will be subject to United States income taxes, including withholding
taxes. However, distributions received by a foreign investor from the Trust that
are designated by the Trust as capital gain dividends should not be subject to
United States Federal income taxes, including withholding taxes, if all of the
following conditions are met (i) the capital gain dividend is not effectively
connected with the conduct by the foreign investor of a trade or business within
the United States, (ii) the foreign investor (if an individual) is not present
in the United States for 183 days or more during his or her taxable year, and
(iii) the foreign investor provides all certification which may be required of
his status (foreign investors may contact the Sponsor to obtain a Form W-8 which
must be filed with the Trustee and refiled every three calendar years
thereafter). Foreign investors should consult their tax advisers with respect to
United States tax consequences of ownership of Units. Units in the Trust and
Trust distributions may also be subject to state and local taxation and
Unitholders should consult their tax advisers in this regard.

Unitholders desiring to purchase Units for tax-deferred plans and IRAs should
consult their broker-dealers for details on establishing such accounts. Units
may also be purchased by persons who already have self-directed plans
established.

THE DOW 30SM & TREASURY TRUST AND BRAND NAME EQUITY TRUST. The following is a
general discussion of certain of the federal income tax consequences of the
purchase, ownership and disposition of the Units of The Dow 30SM & Treasury
Trust and Brand Name Equity Trust. The summary is limited to investors who hold
the Units as "capital assets" (generally, property held for investment within
the meaning of Section 1221 of the Internal Revenue Code of 1986 (the "Code")).
Unitholders should consult their tax advisers in determining the federal, state,
local and any other tax consequences of the purchase, ownership and disposition
of Units in the Trusts. For purposes of the following discussion and opinion, it
is assumed that each Security is equity for federal income tax purposes.

In the opinion of Chapman and Cutler, special counsel for the Sponsor, under
existing law:

1. The Trust is not an association taxable as a corporation for federal
income tax purposes; each Unitholder will be treated as the owner of a pro rata
portion of each of the assets of the Trust under the Code; and the income of the
Trust will be treated as income of the Unitholders thereof under the Code. Each
Unitholder will be considered to have received his pro rata share of income
derived from the Trust asset when such income is considered to be received by
the Trust.

2. A Unitholder will be considered to have received all of the dividends paid
on his pro rata portion of each Security when such dividends are considered to
be received by the Trust regardless of whether such dividends are used to pay a
portion of the deferred sales charge. Unitholders will be taxed in this manner
regardless of whether distributions from the Trust are actually received by the
Unitholder or are automati cally reinvested.

3. Each Unitholder will have a taxable event when the Trust disposes of a
Security (whether by sale, exchange, liquidation, redemption, or otherwise) or
upon the sale or redemption of Units by such Unitholder (except to the extent an
in kind distribution of stock is received by such Unitholder as described
below). The price a Unitholder pays for his Units, generally including sales
charges, is allocated among his pro rata portion of each Security held by the
Trust (in proportion to the fair market values thereof on the valuation date
nearest the date the Unitholder purchase his Units) in order to determine his
initial tax basis for his pro rata portion of each Security held by the Trust.
Unitholders should consult their own tax advisers with regard to calculation of
basis. For federal income tax purposes, a Unitholder's pro rata portion of
dividends as defined by Section 316 of the Code paid by a corporation with
respect to an Security held by the Trust are taxable as ordinary income to the
extent of such corporation's current and accumulated "earnings and profits". A
Unitholder's pro rata portion of dividends paid on such Security which exceeds
such current and accumulated earnings and profits will first reduce a
Unitholder's tax basis in such Security, and to the extent that such dividends
exceed a Unitholder's tax basis in such Security shall generally be treated as
capital gain. In general, the holding period for such capital gain will be
determined by the period of time a Unitholder has held his Units.

4. A Unitholder's portion of gain, if any, upon the sale or redemption of
Units or the disposition of Securities held by the Trust will generally be
considered a capital gain, except in the case of a dealer or a financial
institution. A Unitholder's portion of loss, if any, upon the sale or redemption
of Units or the disposition of Securities held by the Trust will generally be
considered a capital loss (except in the case of a dealer or a financial
institution). Unitholders should consult their tax advisers regarding the
recognition of such capital gains and losses for federal income tax purposes.

Deferred Sales Charge. Generally, the tax basis of a Unitholder includes
sales charges, and such charges are not deductible. A portion of the sales
charge for the Brand Name Equity Trust is deferred. The income (or proceeds from
redemption) a Unitholder must take into account for federal income tax purposes
is not reduced by amounts deducted to pay the deferred sales charge. Unitholders
should consult their own tax advisers as to the income tax consequences of the
deferred sales charge.

Dividends Received Deduction. A corporation that owns Units will generally be
entitled to a 70% dividends received deduction with respect to such Unitholder's
pro rata portion of dividends received by the Trust (to the extent such
dividends are taxable as ordinary income, as discussed above, and are
attributable to domestic corporations) in the same manner as if such corporation
directly owned the Securities paying such dividends (other than corporate
Unitholders, such as "S" corporations, which are not eligible for the deduction
because of their special characteristics and other than for purposes of special
taxes such as the accumulated earnings tax and the personal holding corporation
tax). However, a corporation owning Units should be aware that Sections 246 and
246A of the Code impose additional limitations on the eligibility of dividends
for the 70% dividends received deduction. These limitations include a
requirement that stock (and therefore Units) must generally be held at least 46
days (as determined under Section 246(c) of the Code). Final regulations have
been issued which address special rules that must be considered in determining
whether the 46 day holding requirement is met. Moreover, the allowable
percentage of the deduction will be reduced from 70% if a corporate Unitholder
owns certain stock (or Units) the financing of which is directly attributable to
indebtedness incurred by such corporation. To the extent dividends received by
the Trust are attributable to foreign corporations, a corporation that owns
Units will not be entitled to the dividends received deduction with respect to
its pro rata portion of such dividends, since the dividends received deduction
is generally available only with respect to dividends paid by domestic
corporations. It should be noted that various legislative proposals that would
affect the dividends received deduction have been introduced. Unitholders should
consult with their tax advisers with respect to the limitations on and possible
modifications to the dividends received deduction.

Limitations on Deductibility of Trust Expenses by Unitholders. Each
Unitholder's pro rata share of each expense paid by the Trust is deductible by
the Unitholder to the same extent as though the expense had been paid directly
by him. It should be noted that as a result of the Tax Reform Act of 1986,
certain miscellaneous itemized deductions, such as investment expenses, tax
return preparation fees and employee business expenses will be deductible by an
individual only to the extent they exceed 2% of such individual's adjusted gross
income. Unitholders may be required to treat some or all of the expenses of the
Trust as miscellaneous itemized deductions subject to this limitation.
Unitholders should consult with their own tax advisers regarding the
deductibility of Trust expenses.

Recognition of Taxable Gain or Loss Upon Disposition of Securities by the
Trust or Disposition of Units. As discussed above, a Unitholder may recognize
taxable gain (or loss) when an Security is disposed of by the Trust or if the
Unitholder disposes of a Unit. The Internal Revenue Service Restructing and
Reform Act of 1998 (the "1998 Tax Act") provides that for taxpayers other than
corporations, net capital gain (which is defined as net long-term capital gain
over net short-term capital loss for the taxable year) realized from property
(with certain exclusions) is subject to a maximum marginal stated tax rate of
20% (10% in the case of certain taxpayers in the lowest tax bracket). Capital
gain or loss is long-term if the holding period for the asset is more than one
year, and is short-term if the holding period for the asset is one year or less.
The date on which a Unit is acquired (i.e., the "trade date") is excluded for
purposed for determining the holding period of the Unit. The legislation is
generally effective retroactively for amounts properly taken into account on or
after January 1, 1998. Capital gains realized from assets held for one year or
less are taxed at the same rates as ordinary income.

If a Unitholder disposes of a Unit he is deemed thereby to have disposed of
his entire pro rata interest in all assets of the Trust including his pro rata
portion of all Securities represented by a Unit.

The Taxpayer Relief Act of 1997 (the "1997 Act") includes provisions that
treat certain transactions designed to reduce or eliminate risk of loss and
opportunities for gain (e.g., short sales, offsetting notional principal
contracts, futures or forward contracts or similar transactions) as constructive
sales for purposes of recognition of gain (but not of loss) and for purposes of
determining the holding period. Unitholders should consult their own tax
advisers with regard to any such constructive sales rules.

Special Tax Consequences of In Kind Distributions Upon Redemption of Units or
Termination of the Trust. As discussed in "Rights of Unitholders--Redemption of
Units", under certain circumstances a Unitholder tendering Units for redemption
may request an in kind distribution. A Unitholder may also under certain
circumstances request an in kind distribution upon the termination of the Trust.
See "Rights of Unitholders--Redemption of Units." As previously discussed, prior
to the redemption of Units or the termination of the Trust, a Unitholder is
considered as owning a pro rata portion of each of the Trust's assets for
federal income tax purposes. The receipt of an in kind distribution will result
in a Unitholder receiving an undivided interest in whole shares of stock plus,
possibly, cash.

The potential tax consequences that may occur under an in kind distribution
with respect to each Security held by the Trust will depend on whether or not a
Unitholder receives cash in addition to Securities. An "Security" for this
purpose is a particular class of stock issued by a particular corporation. A
Unitholder will not recognize gain or loss if a Unitholder only receives
Securities in exchange for his or her pro rata portion in the Securities held by
the Trust. However, if a Unitholder also receives cash in exchange for a
fractional share of Security held by the Trust, such Unitholder will generally
recognize gain or loss based upon the difference between the amount of cash
received by the Unitholder and his tax basis in such fractional share of
Security held by the Trust.

Because the Trust will own many Securities, a Unitholder who requests an in
kind distribution will have to analyze the tax consequences with respect to each
Security owned by the Trust. The amount of taxable gain (or loss) recognized
upon such exchange will generally equal the sum of the gain (or loss) recognized
under the rules described above by such Unitholder with respect to each Security
owned by the Trust. Unitholders who request an in kind distribution are advised
to consult their tax advisers in this regard.

Computation of the Unitholder's Tax Basis. Initially, a Unitholder's tax
basis in his Units will generally equal the price paid by such Unitholder of his
Units. The cost of the Units is allocated among the Securities held in the Trust
in accordance with the proportion of the fair market values of such Securities
on the valuation date nearest the date the Units are purchased in order to
determine such Unitholder's tax basis for his pro rata portion of each Security.
A Unitholder's tax basis in his Units and his pro rata portion of a Security
held by the Trust will be reduced to the extent dividends paid with respect to
such Security are received by the Trust which are not taxable as ordinary income
as described above. General. Each Unitholder will be requested to provide the
Unitholder's taxpayer identification number to the Trustee and to certify that
the Unitholder has not been notified that payments to the Unitholder are subject
to back-up withholding. If the proper taxpayer identification number and
appropriate certification are not provided when requested, distributions by the
Trust to such Unitholder (including amounts received upon the redemption of
Units) will be subject to back-up withholding. Distributions by the Trust (other
than those that are not treated as United States source income, if any) will
generally be subject to United States income taxation and withholding in the
case of Units held by non-resident alien individuals, foreign corporations or
other non-United States persons. Such persons should consult their tax advisers.

In general, income that is not effectively connected to the conduct of a
trade or business within the United States that is earned by non-U.S.
Unitholders and derived from dividends of foreign corporations will not be
subject to U.S. withholding tax provided that less than 25 percent of the gross
income of the foreign corporations for a three-year period ending with the close
of its taxable year preceding payment was not effectively connected to the
conduct of a trade or business within the United States. In addition, such
earnings may be exempt from U.S. withholding pursuant to a specific treaty
between the United States and a foreign country. Non-U.S. Unitholders should
consult their own tax advisers regarding the imposition of U.S. withholding on
distributions from the Trust.

It should be noted that payments to the Trust of dividends on Securities that
are attributable to foreign corporations may be subject to foreign withholding
taxes and Unitholders should consult their tax advisers regarding the potential
tax consequences relating to the payment of any such withholding taxes by the
Trust. Any dividends withheld as a result thereof will nevertheless be treated
as income to the Unitholders. Because, under the grantor trust rules, an
investor is deemed to have paid directly his share of foreign taxes that have
been paid or accrued, if any, an investor may be entitled to a foreign tax
credit or deduction for United States tax purposes with respect to such taxes.
The 1997 Act imposes a required holding period for such credits. Investors
should consult their tax advisers with respect to foreign withholding taxes and
foreign tax credits.

At the termination of the Trust, the Trustee will furnish to each Unitholder
of the Trust a statement containing information relating to the dividends
received by the Trust on the Securities, the gross proceeds received by the
Trust from the disposition of any Security (resulting from redemption or the
sale of any Security), and the fees and expenses paid by the Trust. The Trustee
will also furnish annual information returns to Unitholders and to the Internal
Revenue Service.

In the opinion of special counsel to the Trust for New York tax matters, the
Trust is not an association taxable as a corporation and the income of the Trust
will be treated as the income of the Unitholders under the existing income tax
laws of the State and City of New York.

The foregoing discussion relates only to the tax treatment of U.S.
Unitholders ("U.S. Unitholders") with regard to federal and certain aspects of
New York State and City income taxes. Unitholders may be subject to taxation in
New York or in other jurisdictions and should consult their own tax advisers in
this regard. As used herein, the term "U.S. Unitholder" means an owner of a Unit
of the Trust that (a) is (i) for United States federal income tax purposes a
citizen or resident of the United States, (ii) a corporation, partnership or
other entity created or organized in or under the laws of the United States or
of any political subdivision thereof, or (iii) an estate or trust the income of
which is subject to United States federal income taxation regardless of its
source or (b) does not qualify as a U.S. Unitholder in paragraph (a) but whose
income from a Unit is effectively connected with such Unitholder's conduct of a
United States trade or business. The term also includes certain former citizens
of the United States whose income and gain on the Units will be taxable.
Unitholders should consult their tax advisers regarding potential foreign, state
or local taxation with respect to the Units.

TRUST OPERATING EXPENSES
- --------------------------------------------------------------------------------

COMPENSATION OF SPONSOR, SUPERVISOR AND EVALUATOR. The Sponsor will not
receive any fees in connection with its activities relating to the Trusts.
However, the Supervisor and Evaluator, which are affiliates of the Sponsor, will
receive the annual fee for portfolio supervisory and evaluation services set
forth in the "Fee Table". These fees may exceed the actual costs of providing
these services to the Trusts but at no time will the total amount received for
supervisory and evaluation services rendered to all Van Kampen unit investment
trusts in any calendar year exceed the aggregate cost of providing these
services in that year.

TRUSTEE'S FEE. For its services the Trustee will receive the fee from each
Trust set forth in the "Fee Table" (which includes the estimated amount of
miscellaneous Trust expenses). The Trustee benefits to the extent there are
funds in the Capital and Income Accounts since these Accounts are non-interest
bearing to Unitholders and the amounts earned by the Trustee are retained by the
Trustee. Part of the Trustee's compensation for its services to each Trust is
expected to result from the use of these funds.

MISCELLANEOUS EXPENSES. The following additional charges are or may be
incurred by a Trust: (a) normal expenses (including the cost of mailing reports
to Unitholders) incurred in connection with the operation of such Trust, (b)
fees of the Trustee for extraordinary services, (c) expenses of the Trustee
(including legal and auditing expenses) and of counsel designated by the
Sponsor, (d) various governmental charges, (e) expenses and costs of any action
taken by the Trustee to protect a Trust and the rights and interests of
Unitholders, (f) indemnification of the Trustee for any loss, liability or
expenses incurred in the administration of a Trust without negligence, bad faith
or wilful misconduct on its part, (g) foreign custodial and transaction fees,
(h) costs associated with liquidating the securities held in a Trust portfolio
and (i) expenditures incurred in contacting Unitholders upon termination of a
Trust.

GENERAL. During the initial offering period, all of the fees and expenses of
a Trust will accrue on a daily basis and will be charged to the Trust at the end
of the initial offering period. After the initial offering period, all of the
fees and expenses of a Trust will accrue on a daily basis and will be charged to
the Trust on a monthly basis. The deferred sales charge, fees and expenses are
paid out of the Capital Account of the related Trust. When these amounts are
paid by or owing to the Trustee, they are secured by a lien on the related
Trust's portfolio. It is expected that Securities will be sold to pay these
amounts which will result in capital gains or losses to Unitholders. See
"Taxation". The Trustee may not sell U.S. Treasury obligations to pay expenses
unless the maturity value of the U.S. Treasury obligations remaining in the
portfolio after the sale equals at least $11 per Unit. The Supervisor's,
Evaluator's and Trustee's fees may be increased without approval of the
Unitholders by amounts not exceeding proportionate increases under the category
"All Services Less Rent of Shelter" in the Consumer Price Index or, if this
category is not published, in a comparable category.

OTHER MATTERS
- --------------------------------------------------------------------------------

LEGAL OPINIONS. The legality of the Units offered hereby has been passed
upon by Chapman and Cutler, 111 West Monroe Street, Chicago, Illinois 60603, as
counsel for the Sponsor. Winston & Strawn has acted as counsel to the Trustee
and as special counsel for New York tax matters.

INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS. The statements of condition and
the related portfolios included in this Prospectus have been audited by Grant
Thornton LLP, independent certified public accountants, as set forth in their
report in this Prospectus, and are included herein in reliance upon the
authority of said firm as experts in accounting and auditing.

ADDITIONAL INFORMATION
- --------------------------------------------------------------------------------

This Prospectus does not contain all the information set forth in the
Registration Statement filed by the Trusts with the SEC. The Information
Supplement, which has been filed with the SEC, includes more detailed
information concerning the Securities, investment risks and general information
about the Trusts. The Information Supplement may be obtained by contacting the
Trustee at (800) 856-8487 or is available along with other related materials at
the SEC's internet site (http://www.sec.gov).

TABLE OF CONTENTS
- --------------------------------------------------------------------------------
TITLE PAGE
- ----- ----

Summary of Essential Financial Information.............................. 2
Fee Table............................................................... 3
The Dow 30 IndexSM Trust................................................ 4
The Dow 30SM & Treasury Trust........................................... 6
Great International Firms Trust......................................... 8
Brand Name Equity Trust................................................. 10
Notes to Portfolios..................................................... 12
The Securities.......................................................... 13
Report of Independent Certified Public Accountants...................... 14
Statements of Condition ................................................ 15
The Trusts.............................................................. A-1
Objectives and Securities Selection..................................... A-1
Risk Factors............................................................ A-2
Public Offering......................................................... A-3
Rights of Unitholders................................................... A-7
Trust Administration.................................................... A-9
Taxation................................................................ A-11
Trust Operating Expenses................................................ A-17
Other Matters........................................................... A-18
Additional Information.................................................. A-18

PROSPECTUS
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OCTOBER 6, 1998

VAN KAMPEN FOCUS PORTFOLIOS

THE DOW 30 INDEXSM TRUST, SERIES 5
THE DOW 30SM & TREASURY TRUST, SERIES 7
GREAT INTERNATIONAL FIRMS TRUST, SERIES 6
BRAND NAME EQUITY TRUST, SERIES 7

VAN KAMPEN FUNDS INC.

One Parkview Plaza
Oakbrook Terrace, Illinois 60181

2800 Post Oak Boulevard
Houston, Texas 77056

Please retain this prospectus for future reference.

VAN KAMPEN
INFORMATION SUPPLEMENT
VAN KAMPEN FOCUS PORTFOLIOS, SERIES 115

- --------------------------------------------------------------------------------
This Information Supplement provides additional information concerning the
risks and operations of the Trust which is not described in the Prospectus. This
Information Supplement should be read in conjunction with the Prospectus. This
Information Supplement is not a prospectus, does not include all of the
information that an investor should consider before investing in a Trust and may
not be used to offer or sell Units without the Prospectus. Copies of the
Prospectus can be obtained by contacting the Sponsor at One Parkview Plaza,
Oakbrook Terrace, Illinois 60181 or by contacting your broker. This Information
Supplement is dated as of the date of the Prospectus and all capitalized terms
have been defined in the Prospectus.

TABLE OF CONTENTS
PAGE
Risk Factors 2
The Trusts 3
Sponsor Information 4
Trustee Information 4
Trust Termination 5

RISK FACTORS

PRICE VOLATILITY. Because the Trusts invest in stocks of U.S. and foreign
companies, you should understand the risks of investing in common stocks before
purchasing Units. These risks include the risk that the financial condition of
the company or the general condition of the stock market may worsen and the
value of the stocks (and therefore Units) will fall. Stocks are especially
susceptible to general stock market movements. The value of stocks often rises
or falls rapidly and unpredictably as market confidence and perceptions of
companies change. These perceptions are based on factors including expectations
regarding government economic policies, inflation, interest rates, economic
expansion or contraction, political climates and economic or banking crises. The
value of Units will fluctuate with the value of the stocks in a Trust and may be
more or less than the price you originally paid for your Units. As with any
investment, we cannot guarantee that the performance of a Trust will be positive
over any period of time. Because the Trusts are unmanaged, the Trustee will not
sell stocks in response to market fluctuations as is common in managed
investments. In addition, because some Trusts hold a relatively small number of
stocks, you may encounter greater market risk than in a more diversified
investment.

DIVIDENDS. Stocks represent ownership interests in a company and are not
obligations of the company. Common stockholders have a right to receive payments
from the company that is subordinate to the rights of creditors, bondholders or
preferred stockholders of the company. This means that common stockholders have
a right to receive dividends only if a company's board of directors declares a
dividend and the company has provided for payment of all of its creditors,
bondholders and preferred stockholders. If a company issues additional debt
securities or preferred stock, the owners of these securities will have a claim
against the company's assets before common stockholders if the company declares
bankruptcy or liquidates its assets even though the common stock was issued
first. As a result, the company may be less willing or able to declare or pay
dividends on its common stock.

FOREIGN STOCKS. Because certain Trusts invest in foreign common stocks,
they involve additional risks that differ from an investment in domestic stocks.
Investments in foreign securities may involve a greater degree of risk than
those in domestic securities. There is generally less publicly available
information about foreign companies in the form of reports and ratings similar
to those that are published about issuers in the United States. Also, foreign
issuers are generally not subject to uniform accounting, auditing and financial
reporting requirements comparable to those applicable to United States issuers.
With respect to certain foreign countries, there is the possibility of adverse
changes in investment or exchange control regulations, expropriation,
nationalization or confiscatory taxation, limitations on the removal of funds or
other assets of a Trust, political or social instability, or diplomatic
developments which could affect United States investments in those countries.
Moreover, industrial foreign economies may differ favorably or unfavorably from
the United States' economy in terms of growth of gross national product, rate of
inflation, capital reinvestment, resource self-sufficiency and balance of
payments position. Foreign securities markets are generally not as developed or
efficient as those in the United States. While growing in volume, they usually
have substantially less volume than the New York Stock Exchange, and securities
of some foreign issuers are less liquid and more volatile than securities of
comparable United States issuers. Fixed commissions on foreign exchanges are
generally higher than negotiated commissions on United States exchanges. There
is generally less government supervision and regulation of securities exchanges,
brokers and listed issuers than in the United States.

FOREIGN CURRENCIES. Certain Trusts also involve the risk that fluctuations
in exchange rates between the U.S. dollar and foreign currencies may negatively
affect the value of the stocks. For example, if a foreign stock rose 10% in
price but the U.S. dollar gained 5% against the related foreign currency, a U.S.
investor's return would be reduced to about 5%. This is because the foreign
currency would "buy" fewer dollars or, conversely, a dollar would buy more of
the foreign currency. Many foreign currencies have fluctuated widely against the
U.S. dollar for a variety of reasons such as supply and demand of the currency,
investor perceptions of world or country economies, political instability,
currency speculation by institutional investors, changes in government policies,
buying and selling of currencies by central banks of countries, trade balances
and changes in interest rates. A Trust's foreign currency transactions will be
conducted with foreign exchange dealers acting as principals on a spot (i.e.,
cash) buying basis. These dealers realize a profit based on the difference
between the price at which they buy the currency (bid price) and the price at
which they sell the currency (offer price). The Evaluator will estimate the
currency exchange rates based on current activity in the related currency
exchange markets, however, due to the volatility of the markets and other
factors, the estimated rates may not be indicative of the rate a Trust might
obtain had the Trustee sold the currency in the market at that time.

LIQUIDITY. Whether or not the stocks in a Trust are listed on a stock
exchange, the stocks may delist from the exchange or principally trade in an
over-the-counter market. As a result, the existence of a liquid trading market
could depend on whether dealers will make a market in the stocks. We cannot
guarantee that dealers will maintain a market or that any market will be liquid.
The value of the stocks could fall if trading markets are limited or absent.

ADDITIONAL UNITS. The Sponsor may create additional Units of a Trust by
depositing into the Trust additional stocks or cash with instructions to
purchase additional stocks. A cash deposit could result in a dilution of your
investment and anticipated income because of fluctuations in the price of the
stocks between the time of the deposit and the purchase of the stocks and
because the Trust will pay brokerage fees.

VOTING. Only the Trustee may sell or vote the stocks in a Trust. While you
may sell or redeem your Units, you may not sell or vote the stocks in your
Trust. The Sponsor will instruct the Trustee how to vote the stocks. The Trustee
will vote the stocks in the same general proportion as shares held by other
shareholders if the Sponsor fails to provide instructions.

YEAR 2000. The Trusts could be negatively impacted if computer systems used
by the Sponsor, Evaluator, Supervisor or Trustee or other service providers to
the Trusts do not properly process date-related information after January 1,
2000. This is commonly known as the "Year 2000 Problem". The Sponsor, Evaluator,
Supervisor and Trustee are taking steps to address this problem and to obtain
reasonable assurances that other service providers to the Trusts are taking
comparable steps. We cannot guarantee that these steps will be sufficient to
avoid any adverse impact on the Trusts. This problem is expected to impact
corporations to varying degrees based on factors such as industry sector and
degree of technological sophistication. We cannot predict what impact, if any,
this problem will have on the issuers of stocks in the Trusts. THE TRUSTS
In seeking the Trusts' objectives, the Sponsor considered the ability of the
Securities to outpace inflation. While inflation is currently relatively low,
the United States has historically experienced periods of double-digit
inflation. While the prices of securities will fluctuate, over time securities
have outperformed the rate of inflation, and other less risky investments, such
as government bonds and U.S. Treasury bills. Past performance is, however, no
guarantee of future results.

Investors should note that the selection criteria were applied to the
Securities for inclusion in the Trusts as of the Initial Date of Deposit. Should
a Security no longer meet the criteria used for selection for a Trust, such
Security will not as a result thereof be removed from a Trust portfolio.

Stocks have been acknowledged as one of the best ways to stay ahead of
inflation over time. For example, common stocks (as represented by the Standard
& Poor's 500 Index) have generally outperformed long-term U.S. Government bonds,
U.S. Treasury bills and the rate of inflation over the long-term. Of course,
this represents past performance of these categories and there is no guarantee
of future results, either of these categories or of the Trust. In addition, the
certain Trusts seek to provide access to international markets which have often
generated historical returns superior to those in the United States. For
example, during 1993-1997, the United States stock market ranked among the top
three developed markets in total return only once and never ranked first
(measured by the Morgan Stanley Capital International USA Index and MSCI country
indexes).

SPONSOR INFORMATION

Van Kampen Funds Inc., a Delaware corporation, is the Sponsor of the Trust.
The Sponsor is an indirect subsidiary of Van Kampen Investments Inc. Van Kampen
Investments Inc. is a wholly owned subsidiary of MSAM Holdings II, Inc., which
in turn is a wholly owned subsidiary of Morgan Stanley Dean Witter & Co.
("MSDW").

MSDW, together with various of its directly and indirectly owned
subsidiaries, is engaged in a wide range of financial services through three
primary businesses: securities, asset management and credit services. These
principal businesses include securities underwriting, distribution and trading;
merger, acquisition, restructuring and other corporate finance advisory
activities; merchant banking; stock brokerage and research services; asset
management; trading of futures, options, foreign exchange commodities and swaps
(involving foreign exchange, commodities, indices and interest rates); real
estate advice, financing and investing; global custody, securities clearance
services and securities lending; and credit card services.

Van Kampen Funds Inc. specializes in the underwriting and distribution of
unit investment trusts and mutual funds with roots in money management dating
back to 1926. The Sponsor is a member of the National Association of Securities
Dealers, Inc. and has offices at One Parkview Plaza, Oakbrook Terrace, Illinois
60181, (630) 684-6000 and 2800 Post Oak Boulevard, Houston, Texas 77056, (713)
993-0500. As of November 30, 1997, the total stockholders' equity of Van Kampen
Funds Inc. was $132,381,000 (audited). (This paragraph relates only to the
Sponsor and not to the Trust or to any other Series thereof. The information is
included herein only for the purpose of informing investors as to the financial
responsibility of the Sponsor and its ability to carry out its contractual
obligations. More detailed financial information will be made available by the
Sponsor upon request.)

As of September 30, 1997, the Sponsor and its Van Kampen affiliates managed
or supervised approximately $65.3 billion of investment products, of which over
$10.85 billion is invested in municipal securities. The Sponsor and its Van
Kampen affiliates managed $54 billion of assets, consisting of $34.3 billion for
55 open-end mutual funds (of which 45 are distributed by Van Kampen Funds Inc.)
$14.2 billion for 37 closed-end funds and $5.5 billion for 106 institutional
accounts. The Sponsor has also deposited approximately $26 billion of unit
investment trusts. All of Van Kampen's open-end funds, closed-ended funds and
unit investment trusts are professionally distributed by leading financial firms
nationwide. Based on cumulative assets deposited, the Sponsor believes that it
is the largest sponsor of insured municipal unit investment trusts, primarily
through the success of its Insured Municipals Income Trust(R) or the IM-IT(R)
trust. The Sponsor also provides surveillance and evaluation services at cost
for approximately $13 billion of unit investment trust assets outstanding. Since
1976, the Sponsor has serviced over two million investor accounts, opened
through retail distribution firms.

TRUSTEE INFORMATION

The Trustee is The Bank of New York, a trust company organized under the
laws of New York. The Bank of New York has its unit investment trust division
offices at 101 Barclay Street, New York, New York 10286 (800) 221-7668. The Bank
of New York is subject to supervision and examination by the Superintendent of
Banks of the State of New York and the Board of Governors of the Federal Reserve
System, and its deposits are insured by the Federal Deposit Insurance
Corporation to the extent permitted by law.

The duties of the Trustee are primarily ministerial in nature. It did not
participate in the selection of Securities for the Trust portfolios.

In accordance with the Trust Agreement, the Trustee shall keep proper books
of record and account of all transactions at its office for each Trust. Such
records shall include the name and address of, and the number of Units of each
Trust held by, every Unitholder. Such books and records shall be open to
inspection by any Unitholder at all reasonable times during the usual business
hours. The Trustee shall make such annual or other reports as may from time to
time be required under any applicable state or federal statute, rule or
regulation. The Trustee is required to keep a certified copy or duplicate
original of the Trust Agreement on file in its office available for inspection
at all reasonable times during the usual business hours by any Unitholder,
together with a current list of the Securities held in each Trust.

Under the Trust Agreement, the Trustee or any successor trustee may resign
and be discharged of its responsibilities created by the Trust Agreement by
executing an instrument in writing and filing the same with the Sponsor. The
Trustee or successor trustee must mail a copy of the notice of resignation to
all Unitholders then of record, not less than 60 days before the date specified
in such notice when such resignation is to take effect. The Sponsor upon
receiving notice of such resignation is obligated to appoint a successor trustee
promptly. If, upon such resignation, no successor trustee has been appointed and
has accepted the appointment within 30 days after notification, the retiring
Trustee may apply to a court of competent jurisdiction for the appointment of a
successor. The Sponsor may remove the Trustee and appoint a successor trustee as
provided in the Trust Agreement at any time with or without cause. Notice of
such removal and appointment shall be mailed to each Unitholder by the Sponsor.
Upon execution of a written acceptance of such appointment by such successor
trustee, all the rights, powers, duties and obligations of the original trustee
shall vest in the successor. The resignation or removal of a Trustee becomes
effective only when the successor trustee accepts its appointment as such or
when a court of competent jurisdiction appoints a successor trustee.

Any corporation into which a Trustee may be merged or with which it may be
consolidated, or any corporation resulting from any merger or consolidation to
which a Trustee shall be a party, shall be the successor trustee. The Trustee
must be a banking corporation organized under the laws of the United States or
any state and having at all times an aggregate capital, surplus and undivided
profits of not less than $5,000,000.

TRUST TERMINATION

A Trust may be liquidated at any time by consent of Unitholders representing
66 2/3% of the Units of such Trust then outstanding or by the Trustee when the
value of the Securities owned by a Trust, as shown by any evaluation, is less
than $500,000 ($3,000,000 if the value of the Trust has exceeded $15,000,000). A
Trust will be liquidated by the Trustee in the event that a sufficient number of
Units of such Trust not yet sold are tendered for redemption by the Sponsor, so
that the net worth of such Trust would be reduced to less than 40% of the value
of the Securities at the time they were deposited in such Trust. If a Trust is
liquidated because of the redemption of unsold Units by the Sponsor, the Sponsor
will refund to each purchaser of Units the entire sales charge paid by such
purchaser. The Trust Agreement will terminate upon the sale or other disposition
of the last Security held thereunder, but in no event will it continue beyond
the Mandatory Termination Date.

Commencing during the period beginning nine business days prior to, and no
later than, the Mandatory Termination Date, Securities will begin to be sold in
connection with the termination of the Trusts. The Sponsor will determine the
manner, timing and execution of the sales of the Securities. The Sponsor shall
direct the liquidation of the Securities in such manner as to effectuate orderly
sales and a minimal market impact. In the event the Sponsor does not so direct,
the Securities shall be sold within a reasonable period and in such manner as
the Trustee, in its sole discretion, shall determine. At least 30 days before
the Mandatory Termination Date the Trustee will provide written notice of any
termination to all Unitholders of the appropriate Trust and in the case of a
Trust will include with such notice a form to enable Unitholders owning 1,000 or
more Units to request an in kind distribution of the U.S.-traded Securities. To
be effective, this request must be returned to the Trustee at least five
business days prior to the Mandatory Termination Date. On the Mandatory
Termination Date (or on the next business day thereafter if a holiday) the
Trustee will deliver each requesting Unitholder's pro rata number of whole
shares of the U.S.-traded Securities in a Trust to the account of the
broker-dealer or bank designated by the Unitholder at Depository Trust Company.
The value of the Unitholder's fractional shares of the Securities will be paid
in cash. Unitholders with less than 1,000 Units, Unitholders in a Trust with
1,000 or more Units not requesting an in kind distribution will receive a cash
distribution from the sale of the remaining Securities within a reasonable time
following the Mandatory Termination Date. Regardless of the distribution
involved, the Trustee will deduct from the funds of the appropriate Trust any
accrued costs, expenses, advances or indemnities provided by the Trust
Agreement, including estimated compensation of the Trustee, costs of liquidation
and any amounts required as a reserve to provide for payment of any applicable
taxes or other governmental charges. Any sale of Securities in a Trust upon
termination may result in a lower amount than might otherwise be realized if
such sale were not required at such time. The Trustee will then distribute to
each Unitholder of each Trust his pro rata share of the balance of the Income
and Capital Accounts of such Trust.

Within 60 days of the final distribution Unitholders will be furnished a
final distribution statement of the amount distributable. At such time as the
Trustee in its sole discretion will determine that any amounts held in reserve
are no longer necessary, it will make distribution thereof to Unitholders in the
same manner.

S-1
CONTENTS OF REGISTRATION STATEMENT

This Registration Statement comprises the following papers and documents:

The facing sheet
The Cross-Reference Sheet
The Prospectus
The signatures
The consents of independent public accountants
and legal counsel

The following exhibits:

1.1 Proposed form of Trust Agreement (to be supplied by amendment).

3.1 Opinion and consent of counsel as to legality of securities being
registered (to be supplied by amendment).

3.2 Opinion of counsel as to Federal income tax status of securities being
registered (to be supplied by amendment).

3.3 Opinion and consent of counsel as to New York tax status of securities
being registered (to be supplied by amendment).

4.1 Consent of Interactive Data Corporation (to be supplied by amendment).

4.2 Consent of Grant Thornton LLP (to be supplied by amendment).

EX-27 Financial Data Schedule (to be supplied by amendment).

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the Registrant,
Van Kampen Focus Portfolios, Series 115 has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized in the City of Chicago and State of Illinois on the 23rd day of
September, 1998.

VAN KAMPEN FOCUS PORTFOLIOS, SERIES 115
(Registrant)

By VAN KAMPEN FUNDS INC.
(Depositor)

GINA M. COSTELLO
Assistant Secretary

Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed below on September 23, 1998 by the
following persons who constitute a majority of the Board of Directors of Van
Kampen Funds Inc.

SIGNATURE TITLE

Don G. Powell Chairman and Chief Executive )
Officer )

John H. Zimmerman President and Chief Operating )
Officer )

Ronald A. Nyberg Executive Vice President and )
General Counsel )

William R. Rybak Executive Vice President and )
Chief Financial Officer )

GINA M. COSTELLO )(Attorney-in-fact*)

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*An executed copy of each of the related powers of attorney was filed
with the Securities and Exchange Commission in connection with the Registration
Statement on Form S-6 of Van Kampen American Capital Equity Opportunity Trust,
Series 64 (File No. 333-33087) and Van Kampen American Capital Equity
Opportunity Trust, Series 87 (File No. 333-44581) and the same are hereby
incorporated herein by this reference.