497

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM N-1A

CHECK APPROPRIATE BOX OR BOXES

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 [_]
PRE-EFFECTIVE AMENDMENT NO. __ [_]
POST-EFFECTIVE AMENDMENT NO. 97 [x]

AND/OR

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940
AMENDMENT NO. 66 [x]

AMERICAN GROWTH FUND, INC.
(EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)
1636 Logan Street, Denver, Colorado 80203
(ADDRESS OF PRINCIPAL EXECUTIVE OFFICES) (ZIP CODE)
REGISTRANTS TELEPHONE NUMBER, INCLUDING AREA CODE (303) 626-0600

1636 Logan Street, Denver, CO 80203
(Name and Address of Agent for Service)

Approximate Date of Proposed Public Offering: as soon as practicable after
the effective date of the Registration Statement

It is proposed that this filing will become effective (check appropriate box)

[X] immediately upon filing pursuant to paragraph (b)
[_] on November 30, 2017 pursuant to paragraph (b)
[_] 60 days after filing pursuant to paragraph (a)(1)
[_] on (date) Pursuant to paragraph (a)(1)
[_] 75 days after filing pursuant to paragraph (a)(2)
[_] on (date) pursuant to paragraph (a)(2) of Rule 485

If appropriate, check the following box:
[_] this post-effective amendment designates a new effective Date for a previously filed post-effective amendment.

497 s1 072318 page 1

SIGNATURES
Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Fund certifies that it meets all of the requirement for effectiveness of this registration statement under rule 485(b) under the Securities Act and has duly caused this registration statement to be signed on its behalf by the undersigned, duly authorized, in the City of Denver, and State of Colorado on the day of November 30, 2017.


American Growth Fund, Inc.By /s/ Timothy E. Taggart
Timothy E. Taggart
President


Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed below by the following persons in the capacities and on the date(s) indicated.


/s/ Timothy E. Taggart
Timothy E. Taggart
Director

November 30, 2017

/s/ Eddie R. Bush
Eddie R. Bush
Director
November 30, 2017

/s/ Darrell Bush
Darrell Bush

Director
November 30, 2017

497 s1 072318 page 2

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Document Type	dei_DocumentType	497
Document Period End Date	dei_DocumentPeriodEndDate	Jul. 31, 2017
Registrant Name	dei_EntityRegistrantName	AMERICAN GROWTH FUND INC
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Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Jul. 19, 2018
Document Effective Date	dei_DocumentEffectiveDate	Jul. 19, 2018
Prospectus Date	rr_ProspectusDate	Nov. 30, 2017

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Nov. 30, 2017

American Growth Fund, Inc. American Growth Fund Series One   Supplement dated July 19, 2018, to the Prospectus dated November 30, 2017

This Supplement replaces certain information contained in the Prospectus of American Growth Fund Series One dated November 30, 2017.

Effective immediately, the table titled “Annual Fund Operating Expenses” in the section titled “Fee Table” is deleted and replaced with the following:

Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) ended July 31, 2017:

Management Fees	1.00%	1.00%	1.00%	1.00%
Distribution and Service (12b-1) fees	0.30%	1.00%	1.00%	None
Other Expenses	5.07%	5.07%	5.07%	5.07%
Acquired Fund fees and expenses (d) (e)	0.01%	0.01%	0.01%	0.01%
Total Annual Fund Operating Expenses	6.38%	7.08%	7.08%	6.08%

(a) Purchases of Class A and Class D shares in amounts of $1,000,000 or more which are not subject to an initial sales charge generally will be subject to a contingent deferred sales charge of 1.0% of amounts redeemed within the first year of purchase. See Class A and D Sales Charges on page 13.
(b) Contingent Deferred Sales Charge for the 1st 2 years is 5%, 3rd & 4th years - 4%, 5th yr. - 3%, 6th yr. - 2%, 7th yr. - 1%.
(c) In the first year after purchase.

(d) The Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets in the Financial Highlights Table below, which do not include acquired fund fees and expenses.

(e) The acquired fund fees and expenses are based on estimated amounts for the current fiscal year.

Effective immediately, the “Principal Investment Strategy” is deleted and replaced with the following:

Investment Research Corporation (the "Adviser") manages the Fund using a growth style of investing. We use a consistent approach to build the Fund´s security portfolio which is made up primarily of common stocks and securities convertible into common stock. These securities are issued by large companies, and to a lesser extent, small and mid-sized companies. When a company´s fundamentals are strong, we believe earnings growth will follow. The Fund may invest in securities of other investment companies, including exchange-traded funds, to obtain desired exposures.

Effective immediately, the following risks have been added to “Principal risks of investing in the Fund”:

~ Investments in Other Investment Companies Risk - the Fund’s investments in other investment companies will be subject to the risks of the other investment companies’ portfolio securities and the Fund will bear indirectly the fees and expenses of the other investment companies in which it invests.
~ Exchange-Traded Funds (“ETFs”) Risk - The Fund is subject to the risks associated with the securities or other investments in which the ETFs invest. The Fund’s shareholders will indirectly bear fees and expenses paid by the ETFs in which it invests, in addition to the Fund’s direct fees and expenses. An index-based ETF’s performance may not match that of the index it seeks to track. An actively managed ETF’s performance will reflect its adviser’s ability to make investment decisions that are suited to achieving the ETF’s investment objective.

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Risk/Return:

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Registrant Name

dei_EntityRegistrantName

AMERICAN GROWTH FUND INC

Prospectus Date

rr_ProspectusDate

Nov. 30, 2017

Supplement [Text Block]

agfi1_SupplementTextBlock

American Growth Fund, Inc. American Growth Fund Series One   Supplement dated July 19, 2018, to the Prospectus dated November 30, 2017

This Supplement replaces certain information contained in the Prospectus of American Growth Fund Series One dated November 30, 2017.

Effective immediately, the table titled “Annual Fund Operating Expenses” in the section titled “Fee Table” is deleted and replaced with the following:

Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) ended July 31, 2017:

Management Fees	1.00%	1.00%	1.00%	1.00%
Distribution and Service (12b-1) fees	0.30%	1.00%	1.00%	None
Other Expenses	5.07%	5.07%	5.07%	5.07%
Acquired Fund fees and expenses (d) (e)	0.01%	0.01%	0.01%	0.01%
Total Annual Fund Operating Expenses	6.38%	7.08%	7.08%	6.08%

(a) Purchases of Class A and Class D shares in amounts of $1,000,000 or more which are not subject to an initial sales charge generally will be subject to a contingent deferred sales charge of 1.0% of amounts redeemed within the first year of purchase. See Class A and D Sales Charges on page 13.
(b) Contingent Deferred Sales Charge for the 1st 2 years is 5%, 3rd & 4th years - 4%, 5th yr. - 3%, 6th yr. - 2%, 7th yr. - 1%.
(c) In the first year after purchase.

(d) The Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets in the Financial Highlights Table below, which do not include acquired fund fees and expenses.

(e) The acquired fund fees and expenses are based on estimated amounts for the current fiscal year.

Effective immediately, the “Principal Investment Strategy” is deleted and replaced with the following:

Investment Research Corporation (the "Adviser") manages the Fund using a growth style of investing. We use a consistent approach to build the Fund´s security portfolio which is made up primarily of common stocks and securities convertible into common stock. These securities are issued by large companies, and to a lesser extent, small and mid-sized companies. When a company´s fundamentals are strong, we believe earnings growth will follow. The Fund may invest in securities of other investment companies, including exchange-traded funds, to obtain desired exposures.

Effective immediately, the following risks have been added to “Principal risks of investing in the Fund”:

~ Investments in Other Investment Companies Risk - the Fund’s investments in other investment companies will be subject to the risks of the other investment companies’ portfolio securities and the Fund will bear indirectly the fees and expenses of the other investment companies in which it invests.
~ Exchange-Traded Funds (“ETFs”) Risk - The Fund is subject to the risks associated with the securities or other investments in which the ETFs invest. The Fund’s shareholders will indirectly bear fees and expenses paid by the ETFs in which it invests, in addition to the Fund’s direct fees and expenses. An index-based ETF’s performance may not match that of the index it seeks to track. An actively managed ETF’s performance will reflect its adviser’s ability to make investment decisions that are suited to achieving the ETF’s investment objective.

AMERICAN GROWTH FUND Series One

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

agfi1_SupplementTextBlock

American Growth Fund, Inc. American Growth Fund Series One   Supplement dated July 19, 2018, to the Prospectus dated November 30, 2017

This Supplement replaces certain information contained in the Prospectus of American Growth Fund Series One dated November 30, 2017.

Effective immediately, the table titled “Annual Fund Operating Expenses” in the section titled “Fee Table” is deleted and replaced with the following:

Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) ended July 31, 2017:

Management Fees	1.00%	1.00%	1.00%	1.00%
Distribution and Service (12b-1) fees	0.30%	1.00%	1.00%	None
Other Expenses	5.07%	5.07%	5.07%	5.07%
Acquired Fund fees and expenses (d) (e)	0.01%	0.01%	0.01%	0.01%
Total Annual Fund Operating Expenses	6.38%	7.08%	7.08%	6.08%

(a) Purchases of Class A and Class D shares in amounts of $1,000,000 or more which are not subject to an initial sales charge generally will be subject to a contingent deferred sales charge of 1.0% of amounts redeemed within the first year of purchase. See Class A and D Sales Charges on page 13.
(b) Contingent Deferred Sales Charge for the 1st 2 years is 5%, 3rd & 4th years - 4%, 5th yr. - 3%, 6th yr. - 2%, 7th yr. - 1%.
(c) In the first year after purchase.

(d) The Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets in the Financial Highlights Table below, which do not include acquired fund fees and expenses.

(e) The acquired fund fees and expenses are based on estimated amounts for the current fiscal year.

Effective immediately, the “Principal Investment Strategy” is deleted and replaced with the following:

Investment Research Corporation (the "Adviser") manages the Fund using a growth style of investing. We use a consistent approach to build the Fund´s security portfolio which is made up primarily of common stocks and securities convertible into common stock. These securities are issued by large companies, and to a lesser extent, small and mid-sized companies. When a company´s fundamentals are strong, we believe earnings growth will follow. The Fund may invest in securities of other investment companies, including exchange-traded funds, to obtain desired exposures.

Effective immediately, the following risks have been added to “Principal risks of investing in the Fund”:

~ Investments in Other Investment Companies Risk - the Fund’s investments in other investment companies will be subject to the risks of the other investment companies’ portfolio securities and the Fund will bear indirectly the fees and expenses of the other investment companies in which it invests.
~ Exchange-Traded Funds (“ETFs”) Risk - The Fund is subject to the risks associated with the securities or other investments in which the ETFs invest. The Fund’s shareholders will indirectly bear fees and expenses paid by the ETFs in which it invests, in addition to the Fund’s direct fees and expenses. An index-based ETF’s performance may not match that of the index it seeks to track. An actively managed ETF’s performance will reflect its adviser’s ability to make investment decisions that are suited to achieving the ETF’s investment objective.

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Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	AMERICAN GROWTH FUND INC
Prospectus Date	rr_ProspectusDate	Nov. 30, 2017
Document Creation Date	dei_DocumentCreationDate	Jul. 19, 2018