ACT TELECONFERENCING INC
S-3/A, 1999-05-05
COMMUNICATIONS SERVICES, NEC
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<PAGE>
     
     As filed with the Securities and Exchange Commission on May 5, 1999.     
    
                                                  Registration No. 333-72575    

================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                              ____________________
    
                               Amendment No. 2 to     
                                    FORM S-3

                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933

                           ACT TELECONFERENCING, INC.
           (Exact name of the Registrant as specified in its charter)

          Colorado                                               84-1132665
(State or other jurisdiction of                              (I.R.S. Employer
incorporation or organization)                               Identification No.)



                         1658 Cole Boulevard, Suite 130
                             Golden, Colorado 80401
                                 (303) 233-3500
                         (Address and telephone number
                        of principal executive offices)

                                Gavin J. Thomson
                         1658 Cole Boulevard, Suite 130
                             Golden, Colorado 80401
                                 (303) 235-9000
                      (Name, address, and telephone number
                             of agent for service)

                                    Copy to:
                              William J. Campbell
                                Benjamin M. Chin
                              Faegre & Benson LLP


                                       1
<PAGE>
 
                              2500 Republic Plaza
                             370 Seventeenth Street
                             Denver, Colorado 80202
                                 (303) 592-9000
                              ___________________
                                        
        Approximate date of commencement of proposed sale to the public:
   As soon as practicable after the registration statement becomes effective.
                              ____________________

  If the only securities being registered on this Form are to be offered under
dividend or interest reinvestment plans, please check the following box. / /
    
  If any of the securities being registered on this Form are to be offered on a
delayed or continuous basis under Rule 415 under the Securities Act of 1933,
other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. /X/     

  If this Form is filed to register additional securities for an offering under
Rule 462(b) under the Securities Act, please check the following box and list
the Securities Act registration statement number of the earlier effective
registration statement for the same offering. / /

  If this Form is a post-effective amendment filed under Rule 462(c) under the
Securities Act, check the following box and list the Securities Act registration
statement number of the earlier effective registration statement for the same
offering. / /

  If delivery of the prospectus is expected to be made under Rule 434, please
check the following box. / /

         

  The registrant hereby amends this registration statement on the 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 under Section 8(a) of the Securities Act of
1933 or until the registration statement shall become effective on the date as
the Commission, acting under Section 8(a), may determine.



                                       2
<PAGE>
 
                                  PROSPECTUS



                          ACT TELECONFERENCING, INC.


                                        
                        131,210 shares of common stock

    
     The selling stockholders, former stockholders of Advanced Multi-Point
Conferencing, Inc. identified on page 13 and Intrepid Communications, LLC, may
from time to time offer and sell our common stock covered by this prospectus on
the National Association of Securities Dealers Automated Quotation SmallCap
System, or on any other national securities exchange on which our common stock
may be listed or traded, or in negotiated  transactions.  The common stock may
be sold directly or through brokers or dealers. See "Plan of Distribution."

     We will not receive any proceeds of any sales of our common stock.  We will
pay all expenses of registration  incurred in connection with the offering, but
the selling stockholders will pay for all selling and other expenses they will
incur. 



                     NASDAQ SmallCap Market Trading Symbol:
                              ACTT (common stock)     
                            _______________________


     This investment involves a high degree of risk.  You should purchase shares
only if you can afford a complete loss.  See "Risk Factors" beginning on page 4.

     The Securities and Exchange Commission or any state securities commission
has not approved or disapproved these securities, or determined if this
prospectus is truthful or complete. Any representation to the contrary is a
criminal offense.

                            _______________________
    
                               Dated May 5, 1999     

                                       3
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
<TABLE>    
<CAPTION>
                                                                            PAGE
<S>                                                                         <C>
RISK FACTORS............................................................     4 

INFORMATION INCORPORATED BY REFERENCE...................................    13

ACT AND RECENT DEVELOPMENTS.............................................    14

SELLING STOCKHOLDERS....................................................    16

FORWARD-LOOKING INFORMATION.............................................    18

USE OF PROCEEDS.........................................................    18

PLAN OF DISTRIBUTION....................................................    18

DESCRIPTION OF SECURITIES...............................................    19

LEGAL MATTERS...........................................................    20

EXPERTS.................................................................    20

INDEMNIFICATION.........................................................    20
</TABLE>     

          We have not authorized any dealer, salesperson, or other person to
give any information or represent anything not contained in this prospectus. You
should not rely on any unauthorized information.  This prospectus does not offer
to sell or buy any shares in any jurisdiction in which it is unlawful.  The
information in this prospectus is current as of the date on the cover.

                                  RISK FACTORS
                                        
          You should consider carefully the following risk factors, along with
the other information contained or incorporated by reference in this prospectus,
in deciding whether to invest in our shares.  These factors, among others, may
cause actual results, events, or performance to differ materially from those
expressed in any forward-looking statements made in this prospectus.
    
Our competitors have substantially greater capital resources and name
recognition than we do, and there is no assurance that we will be able to
compete against our competitors and potential competitors in terms of research
and development, manufacturing, marketing, and sales.

          The teleconferencing industry is highly competitive. There is no
assurance that we will be able to compete against our competitors and potential
competitors in terms of research and development, manufacturing, marketing, and
sales. Many of our competitors have substantially     
                                       4
<PAGE>
     
greater capital resources and name recognition than we do. Competition in our
markets is based primarily on quality, service, and price. To compete
successfully against other teleconferencing providers, we must be able to
maintain competitive pricing while at the same time offer high quality services
and related products. Competition in our markets may result in pricing pressures
that may adversely affect the prices and sales levels of our teleconferencing
services and related products. Teleconferencing equipment and bridges are widely
available at relatively affordable prices. There are few regulatory barriers to
competition in the United States. Until recently, local exchange carriers,
including local telephone companies, were prohibited from providing audio
teleconferencing, except in limited areas. The United States Congress recently
passed legislation that permits local exchange carriers to offer
teleconferencing services. This legislation permits additional competition if
some or all of the local exchange carriers choose to enter or expand their
activities in the teleconferencing market in the United States. In addition,
existing competitors can be expected to expand their services and new
competitors are likely to be encountered. There are no significant regulatory
barriers to market entry in the United Kingdom, the Netherlands, France,
Belgium, Canada, or Australia. Barriers to entry in other foreign markets vary,
but may involve governmental regulation or government-owned telephone systems
resistant to competition with independent teleconferencing companies.

We may not be able to replace our key executives.

     There is no assurance the we would be able to adequately identify and
employ lost key executives.  While we employ a number of key personnel, we are
dependent on the services of Gerald D. Van Eeckhout, our Chairman.  Although we
maintain a key-employee life insurance policy on Mr. Van Eeckhout, there is no
assurance the proceeds from the insurance would be adequate to identify and
employ his successor and to compensate us for the loss of his services.

We may not be able to hire enough additional technical personnel to meet our
needs.

     Our expansion and operations may be adversely affected if we are unable to
hire sufficient technical personnel.  The design, engineering, and repair of
teleconferencing equipment and networks is a highly technical enterprise, and we
must continue to locate and employ technically qualified contractors and/or
employees to install, maintain, and repair the equipment and networks.  These
employees may command premium compensation.  If sufficiently qualified persons
cannot be found and employed on a timely basis as we seek to expand our
operations, our expansion may be delayed or our operations otherwise adversely
affected.

If integrated services digital network telephone service does not become widely
available at affordable rates, our business, operating, and financial results
could be a negatively impacted.

     High quality videoconferencing generally requires integrated services
digital network, ISDN, telephone service. There can be no assurance that the
videoconferencing systems or services we offer will achieve significant market
acceptance; that competitors will not market similar services at prices more
competitive than our product; or that potential customers will     

                                       5
<PAGE>
     
have access to integrated services digital network telephone services at rates
which facilitate their purchase. Integrated services digital network telephone
service is technically acceptable but is not yet universally available in the
United States and is generally higher priced than ordinary telephone service. We
have entered the video conferencing market with the offering of a video
conferencing and video bridging system, ActionView, that we believe is priced
competitively to comparable service offerings. We distribute videoconferencing
products in the United States under the Tandberg brand name and under the
Picturetel and RSI brand names in Europe.     

We have sustained losses in the past, and we expect to sustain losses in the
future.
    
     Despite a continuing trend of strong revenue growth, we have incurred net
losses in all years from inception in 1990, except for the fiscal year ending
December 31, 1993.  Data before 1993 is unaudited.     

<TABLE>
<CAPTION>
Accounting Period            Net Revenues      Revenue Growth        Net Income (Loss)
                                                    Rate
- -----------------------------------------------------------------------------------------
<S>                       <C>                 <C>                <C>
December 31, 1990                $   153,000                --
- -----------------------------------------------------------------------------------------
December 31, 1991                $   435,000               184%              ($   101,000)
- -----------------------------------------------------------------------------------------
December 31, 1992                $   954,000               119%              ($    77,000)
- -----------------------------------------------------------------------------------------
December 31, 1993                $ 1,582,000                66%               $    26,000
- -----------------------------------------------------------------------------------------
December 31, 1994                $ 2,483,000                57%              ($   253,000)
- -----------------------------------------------------------------------------------------
December 31, 1995                $ 3,461,000                39%              ($   424,000)
- -----------------------------------------------------------------------------------------
December 31, 1996                $ 6,220,000                80%              ($ 1,208,000)
- -----------------------------------------------------------------------------------------
December 31, 1997                $10,234,000                65%              ($   437,000)
- -----------------------------------------------------------------------------------------
December 31, 1998                $19,010,000                86%              ($ 2,036,000)
- -----------------------------------------------------------------------------------------
</TABLE>

                                       6
<PAGE>
     
     We incurred a net loss of $2,036,000 for 1998, primarily as the result of
budgeted developmental expenses and start up costs incurred in opening new
offices overseas, meeting our obligations under our agreement with Concert
Global Networks Limited, and in developing new business.   While expenditures of
this nature in previous entries into international markets have resulted in
substantial revenue growth, we have a continuing need for additional capital to
allow us to sustain growth.  Although there is no assurance that the growth will
result in profitable operations, we have achieved break-even operations before
or during the third year of operation for each of our foreign subsidiaries in
the United Kingdom and the Netherlands.  We have not yet achieved break-even
status for our offices in France and Australia that opened in 1997.

Our revenues may significantly fluctuate because we may draw significant
revenues from the same clients of our services.     

     The mobility of our customers may adversely affect our ability to generate
sufficient revenues to support our fixed costs and our growth. Teleconferencing
customers can easily switch to a competing provider or allocate their business
among several vendors. Our relatively small revenue base makes us susceptible to
significant fluctuations in revenues from any single purchaser of our services.
Our three largest customers accounted for following percentages of revenues:

<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------
                             Customer 1              Customer 2                Customer 3
- -----------------------------------------------------------------------------------------------
<S>                     <C>                   <C>                       <C>
         1996                   10.9%                   10.5%                      7.2%
- -----------------------------------------------------------------------------------------------
         1997                   23.7%                    6.6%                      3.1%
- -----------------------------------------------------------------------------------------------
         1998                   21.1%                    5.1%                      3.0%
- -----------------------------------------------------------------------------------------------
</TABLE>

     Some of our largest customers operate numerous business locations each of
which makes teleconferencing decisions independently of other locations.  We
believe this factor tempers the risk involved in drawing significant revenues
from the same client.
    
If we are not be able to obtain sufficient financing, our plans to expand and to
enter into international markets may be limited or disrupted.

     Our plans to expand and to enter international markets may fail if we are
unable to obtain sufficient financing. We have no assurance that major long-term
financing will be available as and when needed.   Many of our current and
prospective domestic and international customers utilize teleconferencing
services for both local and long-distance teleconferencing, and for reasons of
cost and convenience often prefer to do business with a teleconferencing office
that is available locally to their central offices.  To compete for the
customers, we may be required to establish a local presence and install bridge
equipment in additional North American, European, and Asia-Pacific cities. Since
we expect to experience startup losses from new installations until revenues
associated with the installations offset related costs, our ability to fund the
costs of the expansions will depend in large part on the availability of
adequate financing.     

                                       7
<PAGE>
     
     Rather than establishing a new office and installing a new bridge in select
cities, we may, in appropriate circumstances, seek to acquire an existing
provider of teleconferencing services in these cities, and may seek to do so by
the issuance of our common stock instead of, or in combination with, a cash
purchase or investment. In October 1998, we acquired 100% of the stock of
Advanced Multi-Point Conferencing, Inc. in Ottawa.  We have no present
agreements or arrangements for the acquisition of other teleconferencing
businesses, but we continually explore the possibility of acquisitions and are
investigating entry into the Hong Kong, and Germany markets.

Our investors' interests in our common stock may be substantially diluted if we
seek to raise additional capital through the sale of additional common stock,
warrants, or preferred stock that is convertible to common stock.

     If all or any part of the consideration for an acquisition consists of our
stock, the acquisition could result in substantial additional dilution to our
existing shareholders. Moreover, if we were to seek to raise additional capital
through the sale of additional common stock and/or warrants, or preferred stock
that is convertible to common stock, at some future date, we may be required to
do so at a price per share that is less than the price of the shares offered in
this prospectus. Future sales of common stock could result in substantial
additional dilution to investors purchasing the shares in this offering.

     The likelihood of our success must be considered in light of the problems,
expenses, difficulties, complications, and delays encountered in connection with
the operation of a relatively new business, our expansion into new markets and
products, the financial strength and effectiveness of our competitors, the
degree to which capital is available to us, and the implementation of an
expanded marketing strategy. The expense of entry into foreign markets is front-
end intensive.  Our entry into video-teleconferencing is a relatively new
activity for us and has had a significant adverse effect on our earnings. Video
conferencing will likely continue to have an adverse effect on earnings while we
attempt to develop this business segment.

If our customers do not timely pay on their accounts, our ability to pay our
accounts when due and to finance ongoing operations may be adversely affected.

     We depend on timely payment of accounts by our customers to finance ongoing
operations.  Delays in our customers' payment may adversely affect our ability
to pay our accounts when due.  We presently have a term loan due in May 1999, an
issue of subordinated debt due in 2003, and a number of capitalized leases due
at various times through 2003.

We may not be able to effectively react and adapt to the rapid technological
changes characteristic of the teleconferencing industry, which will have a
material adverse effect on us.     

     Technological innovations, such as computer-based bridging equipment, have
enabled us to engage in the teleconferencing services business. These
innovations are likely to continue 

                                       8
<PAGE>
 
and there can be no assurance that we will be able to react and adapt to these
changes should they develop, that equipment or software innovations would be
available to us at a reasonable price in the future, or that competitors'
developments will not render our services obsolete. Although we recently
upgraded our bridging equipment to provide state-of-the-art audio
teleconferencing technology, which has been augmented to provide data
teleconferencing and video teleconferencing, rapid technological changes in the
teleconferencing industry may render our bridging or other teleconferencing
equipment obsolete or require our substantial additional investment to remain
competitive. There can be no assurance the technical innovations would be
available to us at a reasonable price, if at all, or that we would be able to
respond adequately to the technical innovations. These events could have a
material adverse effect on us.

Our systems may not be year 2000 compliant which could cause our computers to be
unavailable for a period of time after December 31, 1999, creating a negative
impact on our business, operating, and financial results.

          As the Year 2000 approaches, many date sensitive computer applications
may fail because they are unable to process dates properly beyond December 31,
1999. Businesses will be required to devote significant resources to convert
their information systems to meet Year 2000 requirements. We believe that our
internal systems are Year 2000 compliant. However, we are significantly
dependent upon external or third parties including electrical utilities,
telecommunications, banking and financial services, airlines, and governmental
agencies and institutions to provide services to us and to purchase services
from us. Their failure to provide services to us due to Year 2000 problems could
have a material adverse effect on our business, results of operations, and
financial condition. Additionally, as these entities devote financial resources
to comply with Year 2000 requirements, the purchasing patterns of our customers
may be affected as they may have reduced funds available to purchase our
services, which could result in a material adverse effect on our business,
results of operations, and financial condition.
    
          We are continually evaluating all our systems to identify Year 2000
problems, but we have not incurred any material costs for remediation for Year
2000 issues. Although we have not yet identified any issues that would require
remediation, we are currently estimating that the future costs to monitor,
control, remediate, remove, and reinstall our systems to be Year 2000 compliant,
to meet changing business conditions, to handle new business opportunities, and
to address Year 2000 issues affecting our vendors and customers that may impact
us will be $500,000 or less in 1999 and an additional $500,000 or less beyond
2000.  Our review of year 2000 contingencies has not identified any likely
business interruptions.  Such interruptions, if they occur, will depend, in
part, on the handling of Year 2000 issues by our third party vendors and
customers.  Accordingly, we are uncertain at this time as to the monetary value
and time period of any interruption due to Year 2000 problems.  We will continue
to review and reevaluate the potential costs of remediation and business
interruptions throughout 1999.

          State of Readiness. We have increased efforts in the development of
          -------------------                                                
its information technology, IT, systems over the past four years with desktop
based Year 2000 compatible      

                                       9
<PAGE>
     
software. From our incorporation in December 1989 to mid 1994, we satisfied our
major systems requirements using manual or semi-automated computer and
accounting systems. We are principally dependent on one of the leading audio
conferencing bridge manufacturers, Compunetix, Inc., for our teleconferencing
bridges. This manufacturer utilizes a non-information technology system. We have
requested Compunetix to verify and certify that all its embedded systems within
our bridges are Year 2000 compliant before September 30, 1999. To the best of
our knowledge, we are not presently dependent upon any other significant
internal non-information technology and/or embedded system which is not Year
2000 compliant.

          Risks of Year 2000 Issues.  Our dependence upon external or third
          --------------------------                                       
parties is significant.  The major areas where a Year 2000 failure could have an
effect on our business would be a failure in one or more of the following major
industries or institutions on which we are dependent either as a supplier to us
or as a customer:

          .     Electrical Utilities
          .     Telecommunications
          .     Banking and Financial Services
          .     Airlines
          .     Government Agencies and Institutions

          Their failure to provide services to us due to Year 2000 problems
could have a material adverse effect on our business, results of operations, and
financial condition. As these entities devote financial resources to comply with
Year 2000 requirements, changes in their customary purchasing patterns could
result in a material adverse effect on our business, results of operations, and
financial condition.   The consequences of our dependence on external third
parties and changes in our customers' purchasing patterns is uncertain.  We are
continually updating our contingency plans further described below to analyze
and handle the uncertainty regarding any Year 2000 issues.

          Contingency Plans.  Our contingency plan for the Year 2000 is to
          ------------------                                              
continue monitoring all major risks on a proactive basis. We believe that we
operate in a changing, high growth, volatile, and high risk environment, and our
management will continually assess and address all risks and not only Year 2000
risks.  Our market sector is a small niche component of the $700 billion annual
worldwide telecommunications industry.  All of our major service providers and
most of our major customers are multinational entities that are substantially
larger than us.  We are largely dependent on our major service providers and
customers. We intend to monitor our exposure and also take appropriate measures
to ensure that we are not unduly dependent upon one particular customer or
industry supplier.  In anticipation of Year 2000, the following contingency
plans are either being considered or have been implemented.

          .     Restrictions will be imposed on business airline flights between
                December 15, 1999 and January 31, 2000.
          .     Our cash in banks will be in reasonable sums in at least two
                major banks and in different corresponding banks overseas.     

                                       10
<PAGE>
     
          .     Uninterrupted power supply has been installed to give additional
                support to the operation of our bridges in all our locations.
          .     A minimum of two telecommunications network providers will be
                connected at all major locations.
          .     Operations centers will be stocked with food, water, and
                bedding, as they are currently for snowstorms, hurricanes,
                severe thunderstorms, and other natural disasters.
          .     Vacations will be adjusted to make optimal use of downtime
                during this period.     

We depend upon rights to technology that we own, and there can be no assurance
that the rights we have are sufficient or that we can adequately protect those
rights.

     There can be no assurance that we will be able to protect our proprietary
information, business practices, or trademarks against a competitor's use, or
that we would be successful in any litigation we might bring to protect our
proprietary information, business practices, or trademarks.  We seek to protect
our proprietary information and business practices as trade secrets.  We believe
our name and the "ACT" logo are unique in the teleconferencing market, but a
variety of other enterprises' common usage of the name "Act" or "ACT" makes
trademark protection in some contexts either unavailable or so likely to
generate litigation or the threat of litigation to make the pursuit of trademark
protection prohibitively expensive.  The United Kingdom's Trade Marks Registry
has issued trademark certificates to us for ACT and ACTIONCALL, which we license
to ACT Teleconferencing Limited, and to ACT Teleconferencing Limited for
CONFERCALL. We hold no patents.

Political and economic changes including exchange rate fluctuations could reduce
our revenue and could create losses in our foreign operations.

     Adverse political or economic developments may occur in even the most
stable political or economic climate, and there are always risks of changes,
including dramatic changes, in currency values in foreign markets. Fluctuations
in currencies could offset revenue gains from the sale of additional
teleconferencing services and/or products, or increase operating losses incurred
in these locations; however, local costs are incurred in local currencies. We
operate foreign subsidiaries in the United Kingdom, the Netherlands, France,
Australia, and Canada. In September 1998 we expanded into Canada with the
opening of a new operations facility in Toronto and in October 1998 we acquired
Ottawa's Advanced Multipoint.  We are investigating the possibility of opening
offices in Germany and in Hong Kong and have incorporated but not opened a
subsidiary in Hong Kong.  Our future expansion in other foreign markets will
necessarily increase our exposure to these risks.


Our common stock price is likely to be highly volatile.

     There can be no assurance that the market price of our common stock will
not decline.  The securities markets have from time to time experienced
significant price and volume fluctuations that may be unrelated to the operating
performance of particular companies.  Our

                                       11
<PAGE>
 
announcement or our competitors' announcements of new products, developments, or
disputes concerning patents or proprietary rights, and economic and other
external factors, as well as period-to-period fluctuations in our financial
results, may have a significant impact on the market price of our common stock.
    
If we fail to meet the net tangible assets requirements of Nasdaq, we may be
removed from listing on the Nasdaq SmallCap market, which would likely adversely
affect both the market price and liquidity for our shares.

     Our common stock is listed on the Nasdaq SmallCap Market.  We may be
removed from the Nasdaq SmallCap market if we fail to meet its maintenance
criteria. Nasdaq requires a minimum net tangible asset value of $2 million.  As
of December 31, 1998, our net tangible asset value was approximately $1.7
million. By February 1999, through a private placement involving 26 investors,
our net tangible asset value increased to $3 million.  However, if we fail to
meet the continuing minimum net tangible asset value requirements necessary to
qualify our common stock to be quoted on the Nasdaq SmallCap Market, these
securities will be governed under various rules of the Securities and Exchange
Commission relating to penny stocks, under the Penny Stock Reform Act of 1990.
SEC rules require broker/dealers to make a suitability determination for
purchases and to obtain the purchaser's prior written consent for a purchase
transaction, thereby restricting the ability of purchasers of shares in this
offering and of broker/dealers to sell shares of the common stock in the open
market.  This restriction would likely affect adversely both the market price
and liquidity for our shares. We intend to maintain qualification for the
continued quotation of our common stock and warrants on the Nasdaq SmallCap
Market after this offering and intend to apply for listing on the Nasdaq
National Market when we meet the applicable listing criteria.  There can be no
assurance that we will be able to maintain our SmallCap Market listing or obtain
the Nasdaq National Market listing.     

The interests of our stockholders and the price of our common stock may be
adversely effected by the public sale of a significant number of the shares
eligible for future sale through the exercise of options and warrants.

     As of December 31, 1998, various persons, including our officers and
directors, held options and warrants to purchase a total of 1,934,364 shares of
common stock. To the extent that any options or warrants are exercised, the
interests of our shareholders may be diluted proportionately.  The price which
we may receive for issuance of our common stock upon exercise of the options and
warrants may be less than the value of, or market price for, our common stock at
the time the options and warrants are exercised. While these options and
warrants are outstanding, the holders are given, at little or no cost, the
opportunity to profit from any increase in the market price of our common stock
without assuming the risk of ownership. So long as the options and warrants
remain unexercised, the terms under which we could obtain equity capital from
other sources may be adversely affected. Moreover, the holders of the options
and warrants may be expected to exercise them at a time when we would, in all
likelihood, be able to obtain needed capital from offering our securities on
terms more favorable than those the outstanding options and warrants provide.

                                       12
<PAGE>
 
     As of December 31, 1998, there were 3,755,783 shares of common stock
outstanding.  Substantial increases in the amount of common stock outstanding as
a result of the exercise of various options and warrants could adversely affect
the market price of the common stock.  Options and warrants of various types
outstanding on December 31, 1998 entitled the holders to purchase 1,934,364
shares of common stock at prices ranging from $2.00 to $9.00 per share.  As long
as the exercise prices of some of these warrants and options are less than the
price at which the common stock is publicly traded, the holders have an
incentive to exercise their warrants or options, rather than purchase shares in
the public market, and, possibly, to resell them at prices that are equal to or
less than the current market price.

                      WHERE YOU CAN FIND MORE INFORMATION
                                        
     This prospectus is part of a registration statement on Form S-3 that we
filed with the Securities and Exchange Commission.  Consistent with the SEC's
rules, we omitted some information from this prospectus that is contained in the
registration statement.  We file annual, quarterly, and special reports, proxy
statements and other information with the SEC.  Our SEC filings are available to
the public over the Internet at the SEC's web site at http://www.sec.gov.  You
may also read and copy any document we file with the SEC at its Public Reference
Room at 450 Fifth Street, N.W., Washington, D.C. 20549.  You can also obtain
copies of the documents at prescribed rates by writing to the Public Reference
Section of the SEC at 450 Fifth Street, N.W., Washington, D.C. 20549.  Please
call the SEC at 1-800-SEC-0330 for further information on the operation of its
Public Reference Room.  Our SEC filings are also available at the office of the
National Association of Securities Dealers, Inc.  For more information on
obtaining copies of our public filings at the National Association of Securities
Dealers, Inc., you should write to National Association of Securities Dealers,
Inc., 1735 K Street, N.W., Washington, D.C. 20006.

                     INFORMATION INCORPORATED BY REFERENCE
                                        
     The SEC allows us to incorporate by reference our publicly-filed documents
into this prospectus, which means that information included in these documents
is considered part of this prospectus. Information that we file with the SEC
after the date of this prospectus will automatically update and supersede this
information.  We incorporate by reference the documents listed below and any
future filings made with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the
Securities Exchange Act of 1934.  The information incorporated by reference is
an important part of this prospectus and information that we file subsequently
with the SEC will automatically update this prospectus.  We incorporate by
reference our:

    
     .     Form SB-2 filed with the SEC on October 10, 1995, File No. 33-97908-
           D, and amendments to the SB-2.    

     .     Form 10-QSB for the quarter ending March 31, 1996 filed with the SEC
           on May 15, 1996, File No. 0-27560.

                                       13
<PAGE>
     
          .     Schedule 14A Information filed with the SEC on April 30, 1997,
                File No. 0-27560.

          .     Schedule 14A Information filed with the SEC on April 30, 1998,
                File No. 0-27560.

          .     Annual report on Form 10-KSB for the year ending December 31,
                1998 filed with the SEC on March 31, 1999, Form 10-KSB/A filed
                April 30, 1999, and all other subsequent amendments to the 10-
                KSB;     

          .     Schedule 14A Information filed with the SEC on April 15, 1998 in
                connection with our May 13, 1998 annual meeting of shareholders,
                File No. 0-27560;

          .     Quarterly reports on Form 10-QSB for the quarters ending March
                31 (filed with the SEC on May 15), June 30 (filed August 14 and
                amended on August 24), and September 30, 1998 (filed November
                16, 1998);

          .     Current reports on Form 8-K filed with the SEC on January 15,
                July 17, and October 30, 1998 and January 4 and January 15,
                1999;

          .     Form S-8 filed July 2, 1998 and Post-Effective Amendment No. 1
                to Form S-8 filed with the SEC on August 19, 1998;

          .     Post-Effective Amendment No. 4 to Form SB-2 filed with the SEC
                on December 8, 1998; and Final Prospectus for Post-Effective
                Amendment No. 4 to Form SB-2 filed with the SEC on January 4,
                1999.
    
     You or any beneficial owner may request a copy of these filings at no
cost, other than an exhibit to a filing unless that exhibit is specifically
incorporated by reference into that filing, by writing to or telephoning us at
the following address:     

                         Investor Relations Department
                         1658 Cole Boulevard, Suite 130
                             Golden, Colorado 80401
                                 (303) 235-9000

                          ACT AND RECENT DEVELOPMENTS
    
     We provide and market a broad range of high-quality audio, video and data
teleconferencing services, and distribute related teleconferencing products to
businesses and other organizations in the United States, United Kingdom,
Netherlands, Belgium, France, and Australia. We maintain operations centers in
these countries, where we have installed and operate computer-managed
telecommunications equipment known as bridges for conducting multiparty audio
conferences.  Bridges connect multiple parties on a single telephone call.
Multipoint control units, MCUs, offer the most advanced bridge technology.  With
the use of multipoint control unit technology, the maximum number of
participants is only limited by the number of conference ports available. One
port is required for each participating telephone line. We have thousands of
ports available to conference parties together.     

                                       14
<PAGE>
 
     Our Actioncall(TM) audio teleconferencing services accommodate multiparty
conferences with a number of participants at levels of audio volume and clarity
that are not generally available on most office telephones. Audio
teleconferencing enables routine meetings, training, information distribution
and other business meetings to take place where travel makes it impractical,
inconvenient, or expensive to assemble a large group on short notice or with
regular frequency. We offer a variety of services at different price levels
depending on customer needs and business volume. Our customers include small
businesses, multinationals, law firms, accounting firms, banks, and a variety of
other businesses and entities.

     Our video conferencing bridging service commenced in 1996 in the United
Kingdom.  It connects video participants by means of a video multipoint control
unit under the ActionViewTM brand name.  We plan to extend this
videoconferencing service to all other operations centers worldwide.
    
     We also offer a variety of audio and video teleconferencing products
including the Tandberg, Picturetel, Polycom, and RSI brand names. These products
are competitively priced, stand-alone systems that permit individuals or small
groups to send and receive video and audio signals over digital telephone
systems. These systems comply with international standards and are connected
primarily over the integrated services digital network, integrated services
digital network, service, which is available in most major metropolitan markets.
Our audio and data teleconferencing services can be provided over any telephone
network.     

     We market data teleconferencing services and software, as an adjunct to our
audio teleconferencing services, and also distribute data teleconferencing
software that permits clients to interconnect desktop computers by standard
modem to simultaneously conduct audio and data teleconferences.

     We market our services and products through our North American, European,
and Asia-Pacific marketing operations.  We are actively seeking opportunities
for expansion through the establishment of additional American, European, and
Asia-Pacific sales offices and operations centers.

     We began handling audio teleconferencing calls for Concert Global Networks
Limited, the global teleconferencing services company owned by British
Telecommunications plc, as an outsource provider of these services during the
fourth quarter of 1998.  In October 1998, we agreed to provide video
teleconferencing bridge services for customers of GTE Telephone Operating
Company and to acquire GTE's video conferencing bridging equipment.

     We incorporated under the laws of Colorado in 1989, and began operations on
January 2, 1990. Through a reorganization in October 1992, we acquired all of
the outstanding shares of our related companies, which were owned by
substantially the same shareholders who owned our shares, transferred our
operating assets to our subsidiaries, and began operations as a holding company.

     In 1992 we acquired 60% of ACT Teleconferencing Limited, a majority owned
United Kingdom subsidiary, to conduct operations in the United Kingdom. In July
1995 we acquired 

                                       15
<PAGE>
 
100% of the issued share capital of NBS, Inc., a Minnesota corporation, and
changed its name to ACT VideoConferencing, Inc. In September 1995 we began audio
teleconferencing operations in continental Europe through a wholly owned
subsidiary, ACT Teleconferencing B.V., a Netherlands corporation.

     In May 1997 we formed ACT Teleconferencing (Pty) Limited, in Australia and
purchased 80% of the issued share capital. In December 1997 we acquired 80% of
the issued shares of Multimedia and Teleconferencing Solutions, Limited, MaTS, a
value-added videoconferencing reseller based in the United Kingdom.   In
February 1998, we formed ACT Teleconferencing France, S.A., for the purpose of
operating a teleconferencing service in France.
    
     In February 1998, we opened an office and established an audio
teleconferencing operations center in New Jersey to serve the New York City
area. In September 1998 we announced our expansion into Canada with the opening
of a new facility in Toronto operated by ACT Teleconferencing Canada, Inc. and
an agreement to acquire Ottawa's Advanced Multipoint Conferencing, Inc.,
Advanced Multipoint.  We closed on the acquisition of Advanced Multipoint in
October 1998.  We are evaluating expansion into Germany and Hong Kong.     

     We operate as a holding company for our wholly owned domestic and foreign
subsidiaries and for our majority owned international subsidiaries.  Our
principal executive offices are located at 1658 Cole Boulevard, Suite 130,
Golden, Colorado 80401, and our telephone number is (303) 233-3500.
    
                              SELLING STOCKHOLDERS

     Consistent with our policy to acquire an existing provider of
teleconferencing services in various cities, rather than establishing a new
office and installing a new bridge in that city, on October 16, 1998, we agreed
to acquire 100% of the shares of Advanced Multipoint Conferencing, Inc.,
Advanced Multipoint, and paid CDN $1,656,000 (US $1,126,080) consisting of CDN
$330,000 (US $224,400) in cash and 112,710 shares of our common stock.  We
extended the closing date to November 5, 1998 to obtain all the appropriate
documentation and to make adjustments in response to fluctuations in market
price of our common stock and exchange rates and to address accounting issues.
The distribution of cash and common stock to Advanced Multipoint's stockholders
was:     

<TABLE>    
<CAPTION>
 ADVANCED               CASH (US Dollars)       CASH (Canadian Dollars)           COMMON STOCK
 MULTIPOINT
 SHAREHOLDER
- ---------------------------------------------------------------------------------------------------
<S>                 <C>                      <C>                           <C>
Mark Kelly                   71,012.67                  104,430.40                    35,666
- ---------------------------------------------------------------------------------------------------
Stephen Nava                 71,012.67                  104,430.40                    35,666
- ---------------------------------------------------------------------------------------------------
</TABLE>      

                                       16
<PAGE>

<TABLE>     
<S>                              <C>                           <C>                           <C>  
Wendy Threader                   71,012.67                     104,430.40                    35,666
- ---------------------------------------------------------------------------------------------------
Anna Cheung                         710.12                       1,044.30                       357
- ---------------------------------------------------------------------------------------------------
Tina Cheung                         710.12                       1,044.30                       357
- ---------------------------------------------------------------------------------------------------
Denis Colbourne                   2,840.50                       4,177.20                     1,428
- ---------------------------------------------------------------------------------------------------
Margo Kelly                       1,420.25                       2,088.60                       714
- ---------------------------------------------------------------------------------------------------
Terry Kelly                       2,840.50                       4,177.20                     1,428
- ---------------------------------------------------------------------------------------------------
Tom Moore                         1,420.25                       2,088.60                       714
- ---------------------------------------------------------------------------------------------------
Jack Threader                     1,420.25                       2,088.60                       714
                                ----------                    -----------                    ------
- ---------------------------------------------------------------------------------------------------
TOTAL:                          224,400.00                    $330,000.00                   112,710 shares
- ---------------------------------------------------------------------------------------------------
</TABLE>     
    
     These ten former Advanced Multi-Point stockholders are selling stockholders
with 112,710 shares of common stock.  These stockholders did not hold any ACT
common stock before this offering and had no relationship with ACT, its
predecessors, or affiliates within the past three years before this offering.

     Additionally, on January 18, 1999, we entered into a services agreement
with Intrepid Communications, LLC, a Colorado limited liability company, for
management and other services in connection with our Ottawa office.  The service
agreement provides for our payment of US $71,500 cash and issuance of 18,500
shares of our common stock to Intrepid Communications, LLC.   Intrepid
Communications, LLC is a selling stockholder of 18,500 shares of common stock.
It did not hold any ACT common stock before this offering and had no
relationship with ACT, its predecessors, or affiliates within the past three
years before this offering.

     Each such selling stockholder will determine the  number  of  shares  that
each  selling stockholder may actually sell, and the offer may depend upon a
number of factors including the market price of the shares.  Because each of the
selling stockholders may offer all, some, or none of the  shares,  and  because
the  offering this prospectus covers is currently not being underwritten, no
estimate can be given as to the number of shares that each of the selling
stockholders will hold upon or prior to termination of this offering.
Accordingly, there can be no assurance that any of the selling stockholders will
sell any or all of their respective shares.

     The shares issued to Advanced Multipoint's stockholders were issued under
Regulation S of the Securities Act of 1933, and the shares issued to Intrepid
Communications, LLC were exempt under section 4(2) of the Securities Act.  The
shares issued to Advanced Multipoint and Intrepid Communications, LLC were
restricted securities and were issued in transactions that were exempt from
registration under the Securities Act of 1933 and state securities laws.     

                                       17
<PAGE>
 
                          FORWARD-LOOKING INFORMATION

     Statements made in this prospectus or in the documents incorporated by
reference in this prospectus that are not statements of historical fact are
forward-looking statements within the meaning of Section 27A of the Securities
Act of 1933, and Section 21E of the Securities Exchange Act of 1934. A number of
risks and uncertainties, including those discussed under the caption "Risk
Factors" above and the documents incorporated by reference in this prospectus
could affect these forward-looking statements and could cause actual results to
differ materially from the statements made.

                                USE OF PROCEEDS
    
     We acquired 100% of Advanced Multipoint's shares of common stock by issuing
our common stock to Advanced Multipoint's stockholders. We acquired Advanced
Multipoint's shares for cash and 112,710 shares of our common stock. We will
issued 18,500 of our shares to Intrepid Communications, LLC and will receive
management and other services from it.  The former Advanced Multipoint selling
stockholders and Intrepid Communications, LLC are selling stockholders and will
receive the proceeds from this offering, and we will not receive any proceeds
from this offering.     


                              PLAN OF DISTRIBUTION
                                            
     The selling stockholders may offer their 131,210 shares of common stock at
various times in one or more of the following transactions:

          .     on the Nasdaq SmallCap Market (or any other exchange on which
                the shares may be listed);

          .     in the over-the-counter market;

          .     in negotiated transactions other than on such exchanges;

          .     by pledge to secure debts and other obligations;

          .     in connection with the writing of non-traded and exchange-traded
                call options, in hedge transactions, in covering previously
                established short positions and in settlement of other
                transactions in standardized or over-the-counter options; or

          .     in a combination of any of the above transactions.     

                                       18
<PAGE>
     
     The selling stockholders may sell their shares at market prices prevailing
at the time of sale, at prices related to such prevailing market prices, at
negotiated prices, or at fixed prices. The selling stockholders may use broker-
dealers to sell their shares. The broker-dealers will either receive discounts
or commissions from the selling stockholders, or they will receive commissions
from purchasers of shares. The selling stockholders will pay all commissions,
and other expenses associated with the sale of securities by them.

     Under certain circumstances the selling stockholders and any broker-dealers
that participate in the distribution may be deemed to be "underwriters" within
the meaning of section 2(11) of the Securities Act. Any commissions received by
such broker-dealers and any profits realized on the resale of shares by them may
be considered underwriting discounts and commissions under the Securities Act.
The selling stockholders may agree to indemnify such broker-dealers against
certain liabilities, including liabilities under the Securities Act.

     The shares in this offering are being registered under our contractual
obligations with the selling stockholders.  We have not made any underwriting
arrangements with respect to the sale of shares offered.     

                           DESCRIPTION OF SECURITIES

     Our authorized capital stock consists of 10,000,000 shares of common stock,
no par value and 1,000,000 shares of preferred stock, no par value. As of
December 31, 1998, approximately 100 shareholders of record held 3,755,783
outstanding shares. We believe these shares are held of record for approximately
450 beneficial shareholders.  There are no shares of preferred stock
outstanding.


Common stock

     The holders of shares of common stock are entitled to one vote for each
share held of record on all matters on which shareholders are entitled or
permitted to vote. There is no cumulative voting for the election of directors.
After recognition of any applicable preferences to any outstanding preferred
stock, holders of common stock are entitled to receive dividends as the board of
directors may lawfully declare out of funds legally available and in liquidation
and to share pro rata in any other distribution to the holders of common stock,
although we have never paid any dividends, and we do not expect to pay any in
the future. Holders of common stock have no preemptive or subscription rights.
There are no conversion rights, redemption rights, sinking fund provisions, or
fixed dividend rights with respect to the common stock.

         
                                       19
<PAGE>
 
                                 LEGAL MATTERS

     Faegre & Benson LLP, our counsel in connection with this offering, has
issued an opinion about the validity of the securities being offered.

                                    EXPERTS

     Ernst & Young LLP, independent auditors, have audited our consolidated
financial statements included in our annual report on Form 10-KSB/A for the year
ended December 31, 1997, as set forth in their report, which is incorporated by
reference in this registration statement.  Our consolidated financial statements
are incorporated by reference in reliance on Ernst & Young LLP's report, given
on their authority as experts in accounting and auditing.

                                INDEMNIFICATION
                                        
     As far as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to our directors, officers, and controlling persons, we
have been advised that in the opinion of the Securities and Exchange Commission
this indemnification is against public policy as expressed in the Securities Act
and is, therefore, unenforceable.

                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution.

     Other expenses in connection with this registration on Form S-3 are
estimated to be:


<TABLE>
<CAPTION>
                                                        Approximate Expense
Item
- -----------------------------------------------------------------------------
<S>                                                   <C>
SEC registration fee                                                  $191.50
- -----------------------------------------------------------------------------
Legal Fees                                                             10,000*
- -----------------------------------------------------------------------------
Accounting Fees and Expenses                                           10,000*
- -----------------------------------------------------------------------------
Transfer Agent's Fees                                                     235*
- -----------------------------------------------------------------------------
Miscellaneous Expenses                                                 973.50*
                                                                      -------
- -----------------------------------------------------------------------------
 Total                                                                $21,400
- -----------------------------------------------------------------------------
</TABLE>

* Indicates estimate for the purpose of this filing.

Item 15.  Indemnification of Directors And Officers.
    
     The Colorado Business Corporation Act permits a corporation organized under
it to indemnify its directors, officers, employees, and agents for various acts.
We formed our Articles of Incorporation to conform to the Colorado Business
Corporation Act. Our Articles      

                                       20
<PAGE>
     
of Incorporation, and their amendments, are incorporated by reference as Exhibit
3.1 to this registration statement.     

     In general, we may indemnify any officer, director, employee, or agent
against expenses, fines, penalties, settlements, or judgments arising in
connection with a legal proceeding to which this person is a party, if that
person's actions were in good faith, were believed to be in our best interest,
and were not unlawful. Indemnification is mandatory with respect to a director
or officer who was wholly successful in defense of a proceeding. In all other
cases, indemnification of a director, officer, employee, or agent requires the
board of directors independent determination, independent legal counsel's
determination, or a vote of the shareholders that the person to be indemnified
met the applicable standard of conduct.

     The circumstances under which indemnification is granted in connection with
an action brought on our behalf  are generally the same as those mentioned
above.  However, with respect to actions against directors, indemnification is
granted only with respect to reasonable expenses actually incurred in connection
with the defense or settlement of the action. In these actions, the person to be
indemnified must have acted in good faith and in a manner the person reasonably
believed was in our best interest; the person must not have been adjudged liable
to us; and the person must not have received an improper personal benefit.

     Indemnification may also be granted under the terms of agreements which may
be entered into in the future according to a vote of shareholders or directors.
In addition, we are  authorized to purchase and maintain insurance which
protects our officers and directors against any liabilities incurred in
connection with their services in these positions. We may obtain an insurance
policy in the future.


Item 16. Exhibits.

<TABLE>    
<CAPTION>

Exhibit 
- -------  
No.                                       Description
- -------  -----------------------------------------------------------------------
<C>      <S>
 3.1(2)  Restated Articles of Incorporation of ACT dated April 15, 1996
 3.2(2)  Bylaws of ACT, amended as of April 15, 1996
 4.1(1)  Form of specimen certificate for common stock of ACT
 5       Opinion of Faegre & Benson LLP
10.1(1)  Stock Option Plan of 1991, as amended, authorizing 400,000 shares of
         common stock for issuance under the Plan
10.2(1)  Form of Stock Option Agreement
10.3(1)  Form of common stock purchase warrant
10.10(1) Split Dollar Insurance Agreement dated March 1, 1990, between ACT and 
         D. Van Eeckhout
10.11(1) Service agreement dated April 10, 1992 between David Holden and ACT
         Teleconferencing Limited
10.19(4) Stock Option Plan of 1996
</TABLE>      

                                       21
<PAGE>
<TABLE> 
<S>      <C>   
10.20(5) Employee Stock Purchase Plan
10.22(6) Loan and Security Agreement dated March 31, 1998 and Form of stock
         purchase warrant with Sirrom Capital Corporation and Equitas L.P.
10.23(6) Loan Agreement with Key Bank, N.A.
10.24(7) Lease Commitment and Warrant with R.C.C. Finance Group Ltd.
10.25(7) Contract for the Supply of Conferencing Services Design Development and
         Information signed July 14, 1998 between ACT Teleconferencing Services,
         Inc. and Concert Global Networks Limited
10.26(7) Agreement for the Supply of Conferencing Services signed July 14, 1998
         between ACT Teleconferencing Services, Inc. and Concert Global Networks
         Limited
10.27(7) Agreement for Videoconferencing Equipment and Services (GTE Telephone
         Operating Companies) dated October 1, 1998
23.1     Consent of Ernst & Young LLP
24.1     Power of Attorney included in signature page of registration statement
</TABLE>

(1) Incorporated by reference, attached as an exhibit of the same number to our
    registration statement on Form SB-2 filed with the SEC on October 10, 1995,
    and amendments to our Form SB-2, File No. 33-97908-D.

(2) Incorporated by reference, attached as an exhibit of the same number to our
    Form 10-QSB for the quarter ending March 31, 1996 filed with the SEC on May
    15, 1996, File No. 0-27560.

(3) Incorporated by reference, attached as an exhibit of the same number to our
    Form S-8, filed with the SEC on July 2, 1998, File 0-27560.
    
(4) Incorporated by reference, attached as an exhibit to our Schedule 14A
    Information filed with the SEC on April 30, 1997, File No. 0-27560, and
    amended and attached as exhibit 4.6 to our Form S-8 filed on July 2, 1998,
    File 333-58403.     

(5) Incorporated by reference, attached as an exhibit to our Schedule 14A
    Information filed with the SEC on April 15, 1998, File No. 0-27560.

(6) Incorporated by reference, attached as an exhibit of the same number to our
    Amendment No. 1 to Form 10-QSB for the quarter ending June 30, 1998 filed
    with the SEC on August 24, 1998 (originally filed under cover of Form SE on
    August 14, 1998), File 0-27560.

(7) Incorporated by reference, attached as an exhibit of the same number to our
    Form 10-QSB for the quarter ending September 30, 1998, filed with the SEC on
    November 16, 1998, File 0-27560.

                                       22
<PAGE>
 
Item 17. Undertakings.

     The undersigned Registrant hereby undertakes:
    
     (1) To file, during any period in which offers or sales are being made, a
post-effective amendment to this registration statement;

          (a) To include any prospectus required by Section 10(a)(3) of the
     Securities Act of 1933;

          (b) To reflect in the prospectus any facts or events arising after the
     effective date of the registration statement (or the most recent post-
     effective amendment) which, individually or in the aggregate, represent a
     fundamental change in the information set forth in the registration
     statement;

          (c) To file, during any period in which offers or sales are being
     made, a post-effective amendment to this registration statement to include
     any material information with respect to the plan of distribution not
     previously disclosed in the registration statement or any material change
     to the information in the registration statement.

     Provided, however, that paragraphs (1)(a) and (1)(b) do not apply if the
information required to be included in a post-effective amendment by those
paragraphs is contained in periodic reports filed by the registrant pursuant to
Section 13 or 15(d) of the Securities Exchange Act of 1934 that are incorporated
by reference in the registration statement.

     (2) That, for the purpose of determining any liability under the Securities
Act, each post-effective amendment shall be deemed to be a new registration
statement relating to the securities offered in the registration statement, and
the offering of the securities at that time shall be deemed to be the initial
bona fide offering of the securities.

     (3) To remove from registration by means of a post-effective amendment any
of the securities being registered which remain unsold at the termination of
this offering.

     That, for purposes of determining any liability under the Securities Act,
each filing of the Registrant's annual report under Section 13(a) or Section
15(d) of the Exchange Act that is incorporated by reference in the registration
statement shall be deemed to be a new registration statement relating to the
securities offered in the registration statement, and the offering of the
securities at that time shall be deemed to be the initial bona fide offering of
the securities.     

     As far as indemnification for liabilities arising under the Securities Act
may be permitted to directors, officers, and controlling persons of the
Registrant under the foregoing provisions, or otherwise, the Registrant has been
advised that in the opinion of the SEC this indemnification is against public
policy as expressed in the Securities Act and is, therefore, unenforceable. If a
claim for indemnification against liabilities (other than the payment by the

                                       23
<PAGE>
 
Registrant of expenses incurred or paid by a director, officer or controlling
person of the Registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the Registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether this
indemnification by it is against public policy as expressed in the Securities
Act and will be governed by the final adjudication of this issue.

                                       24

<PAGE>
 
                                   SIGNATURES
    
     Under the requirements of the Securities Act of 1933, the registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3 and has duly caused the undersigned to sign
this registration statement or amendment on the registrant's behalf, duly
authorized in the City of Golden, State of Colorado, on May 3, 1999.     


                                          ACT TELECONFERENCING, INC.

    
Date: May 3, 1999                         By   /s/ Gerald D. Van Eeckhout
                                            -----------------------------
                                            Gerald D. Van Eeckhout
                                            Chief Executive Officer

     Under to the requirements of the Securities Act of 1933, the following
persons in the capacities and on the dates stated signed this registration
statement or amendment.

Signature                               Title
- ---------                               -----

/s/ Gerald D. Van Eeckhout      Chief Executive Officer
- --------------------------      and Director                 
Gerald D. Van Eeckhout          (Principal Executive Officer) 
                                                              

/s/ Gavin Thomson               Chief Financial Officer
- --------------------------      (Principal Financial & Accounting Officer) 
Gavin Thomson                                                       

*                               Director
- --------------------------                             
Ronald J. Bach

*                               Director
- --------------------------                             
James F. Seifert

*                               Director
- --------------------------                             
Carolyn R. Van Eeckhout

*                               Director
- --------------------------                             
Donald Sturtevant
    
* Gavin Thomson signs this document on behalf of each of the above named
directors of the registrant under each person's duly executed power of 
attorney.     

                                            /s/ Gavin Thomson
                                            -------------------------------
                                            Gavin Thomson, Attorney in fact

                                       25
<PAGE>
 
Index to Exhibits
All exhibits are filed electronically or incorporated by reference.

<TABLE>    
<CAPTION>
        
Exhibit   
No.                                        Description
- --------  ------------------------------------------------------------------------------
<C>       <S>
  3.1(2)  Restated Articles of Incorporation of ACT dated April 15, 1996
  3.2(2)  Bylaws of ACT, amended as of April 15, 1996
  4.1(1)  Form of specimen certificate for common stock of ACT
       5  Opinion of Faegre & Benson LLP
 10.1(1)  Stock Option Plan of 1991, as amended, authorizing 400,000 shares of common
          stock for issuance under the Plan
 10.2(1)  Form of Stock Option Agreement
 10.3(1)  Form of common stock purchase warrant
10.10(1)  Split Dollar Insurance Agreement dated March 1, 1990, between ACT and Gerald
          D. Van Eeckhout
10.11(1)  Service agreement dated April 10, 1992 between David Holden and ACT
          Teleconferencing Limited
10.19(4)  Stock Option Plan of 1996
10.20(5)  Employee Stock Purchase Plan
10.22(6)  Loan and Security Agreement dated March 31, 1998 and Form of stock purchase
          warrant with Sirrom Capital Corporation and Equitas L.P.
10.23(6)  Loan Agreement with Key Bank, N.A.
10.24(7)  Lease Commitment and Warrant with R.C.C. Finance Group Ltd.
10.25(7)  Contract for the Supply of Conferencing Services Design Development and
          Information signed July 14, 1998 between ACT Teleconferencing Services, Inc.
          and Concert Global Networks Limited
10.26(7)  Agreement for the Supply of Conferencing Services signed July 14, 1998
          between ACT Teleconferencing Services, Inc. and Concert Global Networks
          Limited
10.27(7)  Agreement for Videoconferencing Equipment and Services (GTE Telephone
          Operating Companies) dated October 1, 1998
    23.1  Consent of Ernst & Young LLP
    24.1  Power of Attorney included in signature page of registration statement
</TABLE>     

(1) Incorporated by reference, attached as an exhibit of the same number to our
    registration statement on Form SB-2 filed with the SEC on October 10, 1995,
    and amendments to our Form SB-2, File No. 33-97908-D.

(2) Incorporated by reference, attached as an exhibit of the same number to our
    Form 10-QSB for the quarter ending March 31, 1996 filed with the SEC on May
    15, 1996, File No. 0-27560.

                                       26
<PAGE>
 
(3) Incorporated by reference, attached as an exhibit of the same number to our
    Form S-8, filed with the SEC on July 2, 1998, File 0-27560.
    
(4) Incorporated by reference, attached as an exhibit to our Schedule 14A
    Information filed with the SEC on April 30, 1997, File No. 0-27560, and
    amended and attached as exhibit 4.6 to our Form S-8 filed on July 2, 1998,
    File 333-58403.     

(5) Incorporated by reference, attached as an exhibit to our Schedule 14A
    Information filed with the SEC on April 15, 1998, File No. 0-27560.

(6) Incorporated by reference, attached as an exhibit of the same number to our
    Amendment No. 1 to Form 10-QSB for the quarter ending June 30, 1998 filed
    with the SEC on August 24, 1998 (originally filed under cover of Form SE on
    August 14, 1998), File 0-27560.

(7) Incorporated by reference, attached as an exhibit of the same number to our
    Form 10-QSB for the quarter ending September 30, 1998, filed with the SEC on
    November 16, 1998, File 0-27560.

                                       27

<PAGE>
 
                                                                       Exhibit 5
                               OPINION OF COUNSEL

                               February 15, 1999


ACT Teleconferencing, Inc.
Suite 130
1658 Cole Boulevard
Golden, Colorado 80401

     RE:  Registration on Form S-3
          ------------------------

Ladies and Gentlemen:

     You have requested our opinion as counsel for ACT Teleconferencing, Inc.,
ACT, a Colorado corporation, in connection with your registration statement on
Form S-3 under the Securities Act of 1933, the Securities Act, as amended, and
the rules and regulations promulgated under the Securities Act, for ACT's
offering of 131,210 shares of common stock, no par value, the shares.

     We have examined ACT Form S-3 to be filed with the SEC on or about February
15, 1999, the registration statement.  We have also examined the amended and
restated articles of incorporation of ACT , as on file with the Secretary of
State of the State of Colorado, the amended and restated bylaws and the minute
book of ACT, various exhibits filed in connection with the registration
statement, and other documents as we have deemed necessary to provide a basis
for the opinion expressed in this opinion.  We have also consulted with officers
and directors of ACT to clarify, confirm, or supplement the foregoing
documentation.

     Based on the foregoing, it is our opinion that all of the necessary
corporate action on the part of ACT has been taken to authorize the issuance and
sale of the shares when sold and issued as the registration statement
contemplates, the shares will be legally and validly issued and outstanding and
the shares will be fully paid and non-assessable.

     We consent to the filing of this opinion as an exhibit to the registration
statement and consent to the use of our name under the caption "Legal Matters"
in the prospectus.

                                                  Very truly yours,
        
                                                  /s/ FAEGRE & BENSON LLP

                                                  Faegre & Benson LLP


<PAGE>
 
                                                                    Exhibit 23.1

                        CONSENT OF INDEPENDENT AUDITORS

                                        
     We consent to the reference to our firm under the caption "Experts" in
Amendment No. 1 to the registration statement Form S-3 and related prospectus of
ACT Teleconferencing, Inc. for the registration of 131,210 shares of its common
stock and to the incorporation by reference therein of our report dated February
20, 1998, with respect to the consolidated financial statements and schedules of
ACT Teleconferencing, Inc. included in its annual report Form 10-KSB/A for the
year ended December 31, 1997, filed with the Securities and Exchange Commission.


                                                  ERNST & YOUNG LLP


Denver, Colorado
March 15, 1999

    
DNVR1:60066444.16     


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