ACT TELECONFERENCING INC
S-3/A, 1999-08-09
COMMUNICATIONS SERVICES, NEC
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<PAGE>


    As filed with the Securities and Exchange Commission on August 9, 1999.

                                                      Registration No. 333-72575
================================================================================
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549
                             --------------------

                              Amendment No. 4 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                                               (I.R.S. Employer
jurisdiction of                                              Identification No.)
incorporation or
 organization)


                        1658 Cole Boulevard, Suite 130
                            Golden, Colorado 80401
                                (303) 235-9000
                         (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
                              2500 Republic Plaza
                            370 Seventeenth Street

                                       1
<PAGE>

                            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.

<PAGE>

                                  PROSPECTUS


                          ACT TELECONFERENCING, INC.


                        132,482 shares of common stock



     The selling shareholders may offer up to 132,482 shares of this offering of
our common stock.

     We will not receive any proceeds of any sales of our common stock.





                    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 August 9, 1999

                                       3
<PAGE>

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


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


ACT'S BUSINESS AND RECENT DEVELOPMENTS.........................................................................14


SELLING SHAREHOLDERS...........................................................................................15


FORWARD-LOOKING INFORMATION....................................................................................17


USE OF PROCEEDS................................................................................................17


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


DESCRIPTION OF SECURITIES......................................................................................18


LEGAL MATTERS..................................................................................................19


EXPERTS........................................................................................................19


INDEMNIFICATION................................................................................................19
</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 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 we  may  not 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, and many of our
competitors have substantially greater capital resources and name recognition
than we do. Accordingly, we may not be able to compete against our competitors
and potential competitors in terms of research and development, manufacturing,
marketing, and sales. 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

                                       4
<PAGE>

pricing pressures that may adversely affect the prices and sales levels of our
teleconferencing services and related products. Pricing is dependent, in part,
on the capacity and efficiency of our equipment and bridges. Teleconferencing
equipment and bridges are widely available at relatively affordable prices.
Bridges connect multiple parties on a single telephone call. Multipoint control
units 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 and our competition have thousands of ports
available to conference parties together. A competitor that operates more ports
than we operate will have more flexibility in the size of conferences it can
conduct and the prices it can charge.

     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.


Our  competitors  may be able to afford  more  advanced  technology  than we can
afford.

     While we heavily rely on personal service, our employees cannot deliver our
service without effective technology. We and our competitors are dependent on
technology. Technological innovations within the telecommunications industry
such as advances in the internet, fiber optics capacity, personal computer based
video conferencing, and computer-based bridging equipment, enable us to engage
in the teleconferencing services business, which will continue to evolve and
advance. Because we recently made substantial investments in new equipment and
technology, we may not have sufficient resources to invest in more advanced
technology if it should become available. Our competitors may be able to afford
even more advanced technology, which may make us less competitive. New
technology may not be available to us at a reasonable price, if at all, or we
may not be able to respond adequately to the challenge of our competitors'
technical innovations. Additionally, competitive developments within the
telecommunications industry may occur whereby teleconferencing services are
given away or heavily subsidized to obtain greater market share. If our limited
financial resources preclude us from offering the most advanced technologically
based services, our services may become obsolete.

We may not be able to adequately replace the loss of Gerald D. Van Eeckhout,
which would harm our business and reputation.

     We may not be able to adequately replace the loss of Gerald D. Van
Eeckhout, our chairman and our major stockholder. The loss of Mr. Van Eeckhout
could result in a loss of investor confidence and a reduction in our ability to
attract telecommunications engineering

                                       5
<PAGE>

talent into the company. Mr. Van Eeckhout is a founder of the teleconferencing
industry and has been involved in the teleconferencing industry for the past 15
years. While we employ a number of key personnel, we are dependent on the
services of Mr. Van Eeckhout. Although we maintain a key-employee life insurance
policy on Mr. Van Eeckhout, the proceeds from the insurance will not 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 for videoconferencing at affordable rates, our business, operating,
and financial results could be negatively impacted.

     The videoconferencing systems or services we offer may not achieve
significant market acceptance, and our competitors may market similar services
at prices more competitive than our product. High quality videoconferencing
generally requires integrated services digital network telephone service.
Integrated services digital network telephone service is technically acceptable
but is not yet universally available in the United States and is generally
higher priced higher than ordinary telephone service. Our potential customers
may not have access to integrated services digital network telephone services at
rates which will facilitate their purchase of our services.

We have sustained losses in the past, we expect continuing losses, and we may
never become profitable.

     Except for 1993, we have incurred net losses in all years from our
inception in 1990, and we expect to continue to incur losses for the foreseeable
future as we develop our global presence. Data before 1993 and the six months
ending June 30, 1999 is unaudited. Our losses are summarized below.

     ------------------------------------------------------------------------
     Accounting Period     Net Revenues       Revenue       Net Income (Loss)
                                            Growth Rate
     ------------------------------------------------------------------------
     December 31, 1990     $153,000                  --
     ------------------------------------------------------------------------
     December 31, 1991     $435,000                 184%         ($   101,000)
     ------------------------------------------------------------------------

                                       6
<PAGE>

     ------------------------------------------------------------------------
     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)
     ------------------------------------------------------------------------

     Six months ending         $13,272,000           ----       ($   232,000)
     June 30, 1999
     ------------------------------------------------------------------------

     We incurred a net loss of $2,036,000 for 1998 and $232,000 for the six
months ending June 30, 1999, 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. Our
growth, however, may not result in profitable operations.

Our revenues may significantly fluctuate because we may draw significant
revenues from several major clients.

     The mobility of our customers may adversely affect our ability to generate
sufficient revenues to support our fixed costs and our growth. Some of our
largest customers operate numerous business locations each of which makes
teleconferencing decisions independently of other locations. Teleconferencing
customers can easily switch to a competing provider or allocate their business
among several vendors. Our three largest customers accounted for the following
percentages of revenues:

     ------------------------------------------------------
                  Customer 1     Customer 2      Customer 3
     ------------------------------------------------------
       1996          10.9%          10.5%           7.2%
     ------------------------------------------------------
       1997          23.7%           6.6%           3.1%
     ------------------------------------------------------
       1998          21.1%           5.1%           3.0%
     ------------------------------------------------------

     Our relatively small revenue base makes us susceptible to significant
fluctuations in revenues from any single purchaser of our services.

                                       7
<PAGE>

Major long-term financing may not be available as and when we need it.

     Our plans to expand in the United States and to enter international markets
may fail if we are unable to obtain sufficient debt or equity financing. Major
long-term financing may not be available as and when we need it. In February
1999, through the conversion of 546,947 public warrants, we obtained equity
financing of $2,707,416, net of expenses. On February 16, 1999, we closed on
equity financing of $604,516 through private placements of units. Each unit
consisted of one share of common stock and one warrant to purchase one share of
common stock. Our ability to obtain further equity financing will be largely
dependent on the public and private equity markets.

     As indicated in note 2 to our consolidated financial statements contained
in our Form 10-KSB of December 31, 1998, we had long term debt, including
capitalized leases, of $4,949,051. This debt included a $2.5 million
subordinated debt lender, a $1 million line of credit to an equipment vendor, a
note payable to a telecommunications provider, and a $500,000 note to our bank.
In May 1999 we obtained additional credit of $2 million through an asset based
lender secured by our United States receivables, $500,000 of which paid off our
bank notes of $493,464 plus interest. By June 30, 1999, we had increased our
long term debt to approximately $5.5 million.

     As our revenues continue to grow, the capital we need to sustain this
revenue growth also continues to grow. Because of our existing long term debt,
including total subordinated debt of approximately $2.5 million, lenders may be
reluctant to provide further debt, subordinated debt, or other financing when we
need it.

     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.

     If we have neither the financing for expansion nor opportunities for
acquisitions, we may be at a competitive disadvantage. 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 new markets.



                                       8
<PAGE>



If the external parties we are dependent upon fail to provide services to us or
purchase services from us because of year 2000 problems, our operations could be
negatively impacted, but the monetary value of this impact is uncertain.

     We believe that our internal systems are year 2000 compliant. However, we
are significantly dependent upon external 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 or purchase services
from us due to year 2000 problems could have a material adverse effect on our
business, results of operations, and financial condition. Companies we do
business with will be required to devote significant resources to convert their
information systems to meet year 2000 requirements. Additionally, as these
entities devote financial resources to comply with year 2000 requirements, their
purchasing patterns may be affected so 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.

     While a review of our year 2000 contingencies has not identified any likely
business interruptions, we anticipate that these interruptions, if they do
occur, will result from our vendors' and customers' handling of year 2000
issues. We are uncertain at this time as to the monetary value and time period
of any interruption due to year 2000 problems that our external party vendors
and customers may cause. 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, we are currently estimating that the future
costs to monitor, control, remediate, remove, and reinstall our systems to be
year 2000 compliant will be $500,000 or less in 1999 and an additional $500,000
or less beyond 2000. We will continue to review and reevaluate the potential
costs of remediation and business interruptions throughout 1999.

We depend upon rights to technology that we own, but our rights may not be
sufficient or we may not be able to adequately protect those rights.

     We may not be able to protect our proprietary information, business
practices, or trademarks against a competitor's use, and we may not be
successful in litigation we might bring to protect our proprietary information,
business practices, or trademarks. We seek to

                                       9
<PAGE>

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 that the pursuit of trademark
protection is prohibitively expensive. We hold no patents.

If political and economic changes require us to close our overseas operations,
our financial results would be negatively impacted.

     If there were major political or economic turmoil in any of the foreign
countries in which we have invested, we would have to consider closing our
operations in that country. This cost to close the operations is estimated to be
no more than $1 million per country, and this cost would negatively impact our
financial results. Over 50% of our revenues comes from our operations outside
the United States, which indicates the importance of our overseas operations.
Our decision to invest in perceived politically and economically stable markets
including Canada, the Netherlands, France, Australia, Hong Kong, and the United
Kingdom may not prove to be accurate.

Our common stock price has been highly volatile, and we expect this volatility
to continue.

     The market price of our common stock is highly volatile and may decline. We
do not yet have broad market liquidity, and our public float is limited to
3,494,758 of our total of 4,437,646 shares outstanding as of June 30, 1999. Our
pattern of prior stock prices illustrates this volatility. The high and low
prices of our common stock price has been:

<TABLE>
<CAPTION>

     1999                                 Common Stock (ACTT)
     -----------------------------------------------------------
                                     High                   Low
                                    ------                ------
<S>                                 <C>                   <C>
     First Quarter                  $ 5.63                $ 4.63
     Second Quarter                 $ 6.63                $ 4.00
     Third Quarter                  $ 9.63                $ 5.00
     (As of July 30, 1999)
</TABLE>

                                       10
<PAGE>


     As of July 30, 1999, the Company's share price was $7.14.

        1998                                 Common Stock (ACTT)
        -----------------------------------------------------------
                                        High                   Low
        -----------------------------------------------------------
        First Quarter                 $ 10.00                $ 5.88
        Second Quarter                $ 11.63                $ 8.00
        Third Quarter                 $ 10.63                $ 6.50
        Fourth Quarter                $  7.25                $ 5.25
        -----------------------------------------------------------


        1997                                 Common Stock (ACTT)
        -----------------------------------------------------------
                                        High                   Low
        -----------------------------------------------------------
        First Quarter                  $ 5.00                $ 2.88
        Second Quarter                 $ 7.50                $ 4.99
        Third Quarter                  $13.05                $ 8.25
        Fourth Quarter                 $ 9.13                $ 4.50
        -----------------------------------------------------------

     We anticipate that the volatility of our common stock price may continue in
the future due to factors including:

        .  our rapid growth rate and high development costs;
        .  actual or anticipated fluctuations in our earnings;
        .  changes in or failure by us to meet securities analysts'
           expectations;
        .  changes in market valuations of other teleconferencing companies;
        .  announcements by us or our competitors of significant technological
           innovations, contracts, acquisitions, strategic partnerships, joint
           ventures, or capital commitments;
        .  introduction of new services by us or our competitors;
        .  conditions and trends in the teleconferencing industry and other
           technology industries; and
        .  future sales of our common stock.

     These factors and period-to-period fluctuations in our financial results
may have a significant impact on the market price of our common stock. These
factors are in addition to significant price and volume fluctuations in the
securities markets that may be unrelated to our operating performance.

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 and the
exercise of outstanding public warrants, our net tangible asset value increased
to $3 million. However, if we fail to meet the continuing minimum net

                                       11
<PAGE>

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 of penny stock
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. We may not be able to maintain our
SmallCap Market listing or obtain the Nasdaq National Market System listing.

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

     As of March 31, 1999, there were 4,437,646 shares of common stock
outstanding. As of March 31, 1999, various persons, including our officers and
directors, held options and warrants to purchase a total of 587,129 shares of
common stock at prices ranging between $2.00 and $9.00 per share. 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. 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.

                      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

                                       12
<PAGE>

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.
     .  Form 10-QSB for the quarter ending March 31, 1999 filed with the SEC on
        May 17, 1999, File No. 0-27560.
     .  Schedule 14A Information filed with the SEC on April 30, 1997, File No.
        0-27560.
     .  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;
     .  Schedule 14A Information filed with the SEC on April 30, 1999, File No.
        0-27560, and any following amendments including, but not limited to, the
        amendment filed on May 18, 1999.
     .  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
        on or about July 6, 1999, and all other subsequent amendments to the 10-
        KSB;
     .  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.

                                       13
<PAGE>

     You or any beneficial owner may request a copy of these filings other than
an exhibit to a filing unless that exhibit is specifically incorporated by
reference into that filing at no cost, 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'S BUSINESS 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, Canada, 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.

     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

                                       14
<PAGE>

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 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 SHAREHOLDERS

     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

                                       15
<PAGE>

Conferencing, Inc., Advanced Multipoint, for consideration consisting of CDN
$330,000 (US $215,094) in cash and 113,982 shares of our common stock. We
extended the closing date to November 5, 1998 to obtain all the appropriate
documentation and to address accounting issues. The distribution of cash and
common stock to Advanced Multipoint's shareholders was:

<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
ADVANCED MULTIPOINT   CASH (US Dollars)   CASH (Canadian Dollars) COMMON STOCK
SHAREHOLDER
- --------------------------------------------------------------------------------
<S>                   <C>                 <C>                     <C>
Mark Kelly                68,067.63             104,430.40         36,938
- --------------------------------------------------------------------------------
Stephen Nava              68,067.63             104,430.40         35,666
- --------------------------------------------------------------------------------
Wendy Threader            68,067.63             104,430.40         35,666
- --------------------------------------------------------------------------------
Anna Cheung                  680.67               1,044.30            357
- --------------------------------------------------------------------------------
Tina Cheung                  680.67               1,044.30            357
- --------------------------------------------------------------------------------
Denis Colbourne            2,722.70               4,177.20          1,428
- --------------------------------------------------------------------------------
Margo Kelly                1,361.35               2,088.60            714
- --------------------------------------------------------------------------------
Terry Kelly                2,722.70               4,177.20          1,428
- --------------------------------------------------------------------------------
Tom Moore                  1,361.35               2,088.60            714
- --------------------------------------------------------------------------------
Jack Threader              1,361.35               2,088.60            714
- --------------------------------------------------------------------------------
TOTAL:                   215,093.68            $330,000.00        113,982 shares
- --------------------------------------------------------------------------------
</TABLE>

     These ten former Advanced Multi-Point shareholders are selling shareholders
with 113,982 shares of common stock. These shareholders 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

                                       16
<PAGE>

market price of the shares. Because each of the selling shareholders 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 shareholders will hold upon or prior
to termination of this offering. Accordingly, the selling shareholders may not
will sell any or all of their respective shares.

     The shares issued to Advanced Multipoint's shareholders 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.

                          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 shareholders. We acquired Advanced
Multipoint's shares for cash and 113,982 shares of our common stock. We issued
18,500 of our shares to Intrepid Communications, LLC and will receive management
and other services from it. The former Advanced Multipoint selling shareholders
and Intrepid Communications, LLC are selling shareholders and will receive the
proceeds from this offering, and we will not receive any proceeds from this
offering.

                             PLAN OF DISTRIBUTION

     The selling shareholders may offer their 132,482 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 negotiated transactions other than on such exchange;

     .  by pledge to secure debts and other obligations;

                                       17
<PAGE>

     .  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.

     The  selling  shareholders  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  shareholders may
use broker-dealers to sell their shares. The broker-dealers  will either receive
discounts or  commissions  from the selling  shareholders,  or they will receive
commissions  from purchasers of shares.  The selling  shareholders  will pay all
commissions, and other expenses associated with the sale of securities by them.

     Under  certain   circumstances   the  selling   shareholders   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  shareholders  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  shareholders.  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.

                                       18
<PAGE>

                                 LEGAL MATTERS

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

                                    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, 1998, 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:

          -------------------------------------------------------
                                                Approximate
          Item                                    Expense
          -------------------------------------------------------
          SEC registration fee                  $    191.50
          -------------------------------------------------------
          Legal Fees                              20,000*
          -------------------------------------------------------
          Accounting Fees and Expenses            16,000*
          -------------------------------------------------------
          Transfer Agent's Fees                      235*
          -------------------------------------------------------
          Miscellaneous Expenses                     973.50*
          -------------------------------------------------------
           Total                                $ 37,400
          -------------------------------------------------------

* 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 of Incorporation,  and their amendments,
are incorporated by reference as Exhibit 3.1 to this registration statement.

                                       19
<PAGE>

         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.


Exhibit
- -------
No.        Description
- ---        -----------
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.

                                       20
<PAGE>

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

(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.

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;

                                       21
<PAGE>

                  (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
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.

                                       22
<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 Golden, State of Colorado.


                                        ACT TELECONFERENCING, INC.


Date: August 6, 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 Gerald D. Van Eeckhout
- --------------------------      and Director (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

                                       23
<PAGE>

Index to Exhibits
All exhibits are filed electronically or incorporated by reference.

Exhibit
- -------
No.         Description
- ---         -----------
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

(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.

                                       24
<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.

                                       25

<PAGE>

                                                                       Exhibit 5
                              OPINION OF COUNSEL

                                August 6, 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
the offering of 132,482 shares of common stock, no par value, the shares, by the
selling shareholders.

         We have  examined ACT Form S-3 filed with the SEC on February 15, 1999,
the registration  statement,  and amendments to 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 the shares have been
legally and validly issued and are fully paid and  non-assessable,  and that all
of the necessary corporate action on the part of ACT has been taken to authorize
the sale of the shares by the selling shareholders.

         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. 3 to the registration statement Form S-3 and related prospectus of
ACT Teleconferencing,  Inc. for the registration of 132,482 shares of its common
stock and to the incorporation by reference therein of our report dated February
16, 1999, 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, 1998, filed with the Securities and Exchange Commission.



                                                ERNST & YOUNG LLP

Denver, Colorado
July 2, 1999



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