ACC CORP
SC 13D/A, 1996-05-21
TELEPHONE COMMUNICATIONS (NO RADIOTELEPHONE)
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                    SECURITIES AND EXCHANGE COMMISSION
                           Washington D.C. 20549

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

                               SCHEDULE 13D
                 Under the securities Exchange Act of 1934

                            (Amendment No 2) *

                              ACC Corporation
                   ------------------------------------
                            (Name of issuer)

                               Common Shares
                   ------------------------------------
                      (Title of Class of Securities)

                                 000794107
                   ------------------------------------
                              (CUSIP Number)

                  Mr J Deighton, Mercury Asset Management plc
  33 King William Street, London EC4R 9AS         Tel No 0171 203 5741
         Name , Address and Telephone Number of Person Authorised
                  to Receive Notices and Communications)

                             8 May, 1996
          (Date of Event which Requires filing of this statement)

If the filing person has previously filed a statement on Schedule 13G to
report the acquisition which is the subject of this Schedule 13D, and is
filing this schedule because of Rule 13d-1 (b)  (3) or (4), check the
following box.    | |

Check the following box if a fee is being paid with the statement |X| (A fee
is not required only if the reporting person:  (1) has a previous statement
on file reporting beneficial ownership of more than five percent of the
class of securities described in Item 1: and (2) has filed no amendment
subsequent thereto reporting beneficial ownership of five percent or less
of such class).  (See Rule 13d-7).

     NOTE:  Six copies of this statement, including all exhibits, should be
filed with the Commission.  See Rule 13d-1 (a) for other parties to whom
copies are to be sent.
________________
    *  The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which
would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities
Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of
that section of the Act but shall be subject to all other provisions of the
Act.  (however, see the Notes.)


Schedule 13D

CUSIP No. __________________________

- -----------------------------------------------------------------------------
1       NAME OF REPORTING PERSON
        SS OR IRS IDENTIFICATION NO OF ABOVE PERSON
        MERCURY ASSET MANAGEMENT plc

- -----------------------------------------------------------------------------
                                                                     __
2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*    (A)    |__|
                                                                     __
                                                             (B)    |__|

- -----------------------------------------------------------------------------
3       SEC USE ONLY

- -----------------------------------------------------------------------------
4       SOURCE OF FUNDS*

        00

- -----------------------------------------------------------------------------
5       CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS                 __
        IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                  |__|

- -----------------------------------------------------------------------------
6       CITIZENSHIP OR PLACE OF ORGANISATION

        ENGLAND

- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
                          7       SOLE VOTING POWER

                                  NONE
 NUMBER OF                ----------------------------------------------------
  SHARES                  8       SHARED VOTING POWER
BENEFICIALLY
 OWNED BY                         NONE
   EACH                   ----------------------------------------------------
 REPORTING                9       SOLE DISPOSITIVE POWER
  PERSON
   WITH                          394,705
                         ----------------------------------------------------
                         10      SHARED DISPOSITIVE POWER

- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

- -----------------------------------------------------------------------------
12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11)           __
         EXCLUDES CERTAIN SHARES*                               |__|

- -----------------------------------------------------------------------------
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

         5.02%

- -----------------------------------------------------------------------------
14       TYPE OF REPORTING PERSON*

         IA

- -----------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

Item 1. Security and Issuer

               The class of equity securities to which this statement
relates is the shares of Common Stock (the "Common Shares") of ACC
Corporation (the "Company") whose principal executive offices are located
at 400 West Avenue, Rochester, New York, NY 14611, USA .  Its telephone
number is (716) 987 3000.

Item 2.        Identity and Background

               This statement is being filed by Mercury Asset Management
plc.  ("Mercury"), a corporation primarily engaged in the business of
managing portfolio investments for its investment clients, organised under
the laws of England, whose principal executive offices are located, and
principal business activities conducted, at 33 King William Street, London
EC4R 9AS, England.

               Pursuant to Rule 13d-4 (17 CFR 240. 13d-4) under the
Securities Exchange Act of 1934 (the "Act")  Mercury hereby declares that
the filing of this statement shall not be construed as an admission that
Mercury is or has been for purposes of Sections 13(d) or 13(g) of the Act,
the beneficial owner of any securities covered by the statement.  As noted
above, Mercury manages portfolio investments of its investment clients, and
the securities covered by this statement are held solely for the account of
such clients.

               Under the terms of its agreements with such clients, Mercury
has discretion to buy and sell securities on their behalf subject to such
guidelines as may be agreed and subject to any contrary instructions which
may be received.  Mercury has neither voting power nor the right to receive
dividends from, or proceeds from the sale of, any portfolio investments.
106,700 shares are held for the benefit of collective investment schemes
managed by Mercury Asset Management Channel Islands Limited, an associate
of Mercury.  A division of Mercury is the investment adviser under contract
to Mercury Asset Management Channel Islands Limited.

               Mercury is a wholly-owned subsidiary of Mercury Asset
Management Group plc, a holding company listed on London Stock Exchange.

               The name, business address, principal occupation or
employment and citizenship of each of the executive officers and directors
of Mercury and Mercury Asset Management Group plc, and the name, country of
incorporation, principal business, and the address of the registered office
(being the address of its principal business and principal office) of
Mercury and Mercury Asset Management Group plc are set forth in Annex A
hereto, which is incorporated herein by reference.

               Neither Mercury nor, to the best of its knowledge, any of
the persons listed in Annex A has during the past five years (a) been
convicted in a criminal proceeding (excluding traffic violations and
similar misdemeanours), or (b) been a party to a civil proceeding of a
judicial or administrative body as a result of which Mercury or any such
person was or is subject to a judgement, decree or final order enjoining
future violations of, or prohibiting or mandating activities subject to,
federal or state securities laws, or finding any violations with respect to
such laws.

Item 3.        Source and Amount of Funds or Other Consideration

               The source of all funds used to acquire the securities
covered by this statement was the investment funds of Mercury's investment
clients.  No part of the purchase price was represented by funds or other
consideration borrowed or otherwise obtained by Mercury than as described
above.

Item 4.        Purpose of Transaction

               The Common Shares were acquired for the purpose of investment.

               (a)  Mercury will monitor its investment and review the
               Company's business affairs and financial position.  Based on
               such review, as well as general economic and industry
               conditions existing at the time, Mercury may consider from
               time to time various alternative courses of action and may
               discuss with management of the Company ways in which the
               value of its investment may be increased.  Such actions may
               include the acquisition of additional Common Stock through
               open market purchases, privately negotiated transactions, or
               otherwise.  Alternatively, such actions may involve the sale
               of all or a portion of Common Stock in the open market, in
               privately negotiated transactions, through a public offering
               or otherwise.

     Neither Mercury nor any person named in Annex A has any plans which
relate to or would result in any of the following:

               (b) an extraordinary corporate transaction, such as an
               amalgamation, merger,

reorganisation or liquidation, involving the Company or any of its
subsidiaries;

               (c) a sale or transfer of a material amount of assets of the
               Company or of any of its subsidiaries;

               (d) any change in the present board of directors or
               management of the Company, including any plans or proposals
               to change the number or term of

directors or to fill any existing vacancies on the                     board;

               (e) any material change in the present capitalisation or
               dividend policy of the Company;

               (f) any other material change in the Company's business or
               corporate structure;

               (g) any change in the Company's charter, by-laws or

               instruments corresponding thereto or other actions which may
               impede the acquisition of control of the Company by any
               person;  (h) causing a class of securities of the Company to
               be delisted from a national securities exchange or to cease
               to be authorised to be quoted in an inter-dealer quotation
               system of a registered national securities association;  (i)
               causing a class of equity securities of the Company to
               become eligible for termination of registration pursuant to
               Section 12(g)  (4) of the Act; or (j) any action similar to
               any of those set forth above.

Item 5.        Interest in Securities of the Issuer

               (a) See Item 2 above. Subject thereto, Mercury has dispositive
               power with respect to 394,705 Common Shares or approximately
               5.02% of the Common Shares outstanding.

               (b) See Item 2 above.

               (c)  See Item 2 Above.  Subject thereto, transactions in the
               Common Shares effected by Mercury on behalf of its
               investment clients are set forth in Annex B.  All
               transactions were effected on the National Association of
               Securities Dealers Automated Quotation System (NASDAQ)
               National Market System.

               (d)  See Item 2 above.  The investment clients of Mercury
               have the right to receive dividends from, and proceeds from
               the sale of Common Shares.

               (e) Not applicable.

Item 6.        Contracts, Arrangements, Understandings or

               Relationships with Respect to Securities of the Issuer

               Except as set forth in Item 2 above, neither Mercury nor, to
the best of its knowledge, any of the persons listed in Annex A hereto has
any contract, arrangement, understanding or relationship (legal or
otherwise) with any person with respect to any securities of the Issuer,
including but not limited to transfer or voting of any of such securities,
finder's fees, joint ventures, loan or option arrangements, puts or calls,
guarantees of profits, division of profits or loss, or the giving or
withholding of proxies.

Item 7.        Material to be Filed as Exhibits
               None.


                         SIGNATURE

               After reasonable inquiry and to the best of its knowledge and
belief, the undersigned certifies that the information set forth in this
Statement is true, complete and correct.

Date:  16 May, 1996

                                         for Mercury Asset Management plc.

                                         By _______________________________
                                                 Authorised Signatory


ANNEX A

                          MERCURY ASSET MANAGEMENT plc.
<TABLE>
<CAPTION.
Executive Officers                                                                  Principal
and Directors                                    Business Address                   Occupation        Citizenship
- ------------------                               ----------------                   ----------        -----------
<S>                                         <C>                                      <C>              <C>
Joint Chairman
- --------------

David William James PRICE                   33 King William Street,                 Investment        British
(Joint Chairman)                            London, EC4R 9AS.                       Director

Stephen Anthony ZIMMERMAN                   33 King William Street,                 Investment        British
(Joint Chairman)                            London, EC4R 9AS.                       Director

Deputy Chairman
- ---------------

Carol GALLEY (Miss)                         33 King William Street,                 Investment        British
(Deputy Chairman)                           London, EC4R 9AS.                       Director

Christopher Nigel                           33 King William Street,                 Investment        British
HURST-BROWN                                 London, EC4R 9AS                        Director
(Deputy Chairman)

Frederick David Stewart                     33 King William Street,                 Investment        British
ROSIER (Deputy Chairman)                    London, EC4R 9AS                        Director

Vice Chairman
- -------------

Dr. Ross John BUNCE                         33 King William Street,                 Investment        British
(Vice Chairman)                             London, EC4R 9AS                        Director

Andrew Searle DALTON                        33 King William Street,                 Investment        British
(Vice Chairman)                             London, EC4R 9AS.                       Director

Charles Vivian JACKSON                      33 King William Street,                 Investment        British
(Vice Chairman)                             London, EC4R 9AS                        Director

Peter William URQUHART                      33 King William Street,                 Investment        British
(Vice Chairman)                             London, EC4R 9AS                        Director

Directors
- ---------

Ian ARMITAGE                                33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Norman McLeod BACHOP                        33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Ian Christopher Simon BARBY                 33 King William Street,                 Investment        British
(Director)                                  London,  EC4R  9AS                      Director          British

Stuart John BAXTER                          33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Thomas Jan BERGER                           33 King William Street,                 Investment        American
(Director)                                  London, EC4R 9AS                        Director

David Thomas Alan BOYLE                     33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Mark Anthony James BRADSHAW                 33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Carol Consuelo BROOKE                       33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

John Loughlin CALLAHAN                      33 King William Street,                 Investment        American
(Director)                                  London, EC4R 9AS                        Director

David John CAUSER                           33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Thomas William George                       33 King William Street,                 Investment        British
CHARLTON                                    London, EC4R 9AS                        Director
(Director)

Nicholas James CHARRINGTON                  33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Colin Martin CLARK                          33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Nicholas James COATS                        33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Stephen Benedict COHEN                      33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

John Nicholas COTTON                        33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Graham Richard DIXON                        33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Charles Bowen FARQUHARSON                   33 King William Street,                 Company           British
(Company Secretary                          London, EC4R 9AS                        Secretary
& Director)                                                                         & Director

Christopher Nigel Holland                   33 King William Street,                 Investment        British
 FOSTER (Director)                          London, EC4R 9AS                        Director

Peter John GIBBS                            33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Peter John Woodville                        33 King William Street,                 Investment        British
HARRISON (Director)                         London, EC4R 9AS                        Director

Paul HARWOOD                                33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Timothy John HASTON                         33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Andrew Malcolm                              33 King William Street                  Investment        British
HUNTER-JOHNSTON                             London, EC4R 9AS                        Director
(Director)

Michael Francis Mostyn                      33 King William Street,                 Investment        British
Owen JODRELL                                London, EC4R 9AS                        Director
(Director)

Andreas Christian Jutting                   33 King William Street                  Investment        Danish
LEHMAN                                      London, EC4R 9AS                        Director
(Director)

Dr. Gordon Alan LINDSAY                     33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Gary LOWE                                   33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Roderick James MACLEOD                      33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Paul Roderick Clucas MARSHALL               33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Shaun Albert MAYS                           25 Floor,101 Collins                    Investment        British/
(Director)                                  Street,Melbourne,Vic                    Director          Australian
                                            3000 AUSTRALIA

Keith Richard MULLINS                       33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Masaru NISHIZAWA                            Hibiya Kokusai Building,                Investment        Japanese
(Director)                                  2-2-3 Uchisaiwaicho,                    Director
                                            Chiyoda-Ku, Tokyo 100

Maurice Joseph O'SHANNASSY                  33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Thomas Andrew OATES                         33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Peter Vincent OLSBERG                       33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Ching Han ONG                               33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Roderick Louis PARIS                        33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

John PARSLOE                                33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Andrew Phillip PICKARD                      33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Ronald William PULLEN                       33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

John William RICHARDS                       33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9ASDirector

Nicholas King RITCHIE                       33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Alexander Frederick                         33 King William Street,                 Investment        British
James ROE (Director)                        London, EC4R 9AS                        Director

Richard George ROYDS                        33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Lynn Christine RUDDICK                      33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Clifford John SHAW                          Warburg Asset Management                Investment        British
(Director)                                  Japan Ltd.,                             Director
                                            Hibiya Kokusai Building,
                                            7th Floor,
                                            2-2-3- Uchisaiwaicho,
                                            Chiyoda-Ku, Tokyo 100

Ian Michael SLACK                           33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Peter William STANYER                       33 King William Street                  Investment        British
(Director)                                  London, EC4R 9AS                        Director

Hugh Alexander STEVENSON                    33 King William Street,                 Chairman of       British
(Director)                                  London, EC4R 9AS                        Mercury Asset
                                                                                    Management
                                                                                    Group plc

Barry William WOOLF                         33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director
</TABLE>

                                      MERCURY ASSET MANAGEMENT GROUP plc
<TABLE>
<CAPTION>
Executive Officers                                                                  Principal          British
  and Directors                                Business Address                     Occupation       Citizenship
- ------------ -----                              ----------------                    ----------       ------------
<S>                                         <C>                                      <C>             <C>

Joint Chairman
- --------------

Hugh Alexander STEVENSON                    33 King William Street,                 Investment        British
(Chairman)                                  London, EC4R 9AS.                       Director

Deputy Chairman
- ---------------

David William James PRICE                   33 King William Street,                 Investment        British
(Deputy Chairman)                           London, EC4R 9AS.                       Director

Stephen Anthony ZIMMERMAN                   33 King William Street,                 Investment        British
(Deputy Chairman)                           London, EC4R 9AS.                       Director

Vice Chairman
- -------------

Carol GALLEY (Miss)                         33 King William Street,                 Investment        British
(Vice Chairman)                             London, EC4R 9AS.                       Director

Company Secretary
- -----------------

Charles Bowen FARQUHARSON                   33 King William Street,                 Investment        British
(Secretary)                                 London, EC4R 9AS.                       Director

Paul Graham BOSONNET                        33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS.                       Director

David John CAUSER                           33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Andrew Searle DALTON                        33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS.                       Director

Peter Stormonth DARLING                     33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Hugh Jon FOULDS                             33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Christopher Nigel                           33 King William Street,                 Investment        British
HURST-BROWN (Director)                      London, EC4R 9AS                        Director

Charles Vivian JACKSON                      33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

Frederick David Stewart                     33 King William Street,                 Investment        British
ROSIER (Director)                           London, EC4R 9AS                        Director

Alfred Joseph SHEPPARD                      33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director

John Charles Grayson                        33 King William Street,                 Investment        British
STANCLIFFE                                  London, EC4R 9AS                        Director

Peter William URQUHART                      33 King William Street,                 Investment        British
(Director)                                  London, EC4R 9AS                        Director
</TABLE>

ANNEX A

                                        Mercury Asset Management Group plc

                                                Directors Lists

                                             CORPORATE INFORMATION
                                             ---------------------
<TABLE>
<CAPTION>
                                                                     Field of                    Country of
Name                                    Registered Office            Activity                  Incorporation
- ----                                    -----------------            --------                  -------------
<S>                                   <C>                          <C>                         <C>
Mercury Asset Management Group plc    33 King William Street,      Holding Company             England
                                      London, EC4R 9AS

Mercury Asset Management plc          33 King William Street,      Investment                  England
                                      London, EC4R 9AS             Management and Advice
</TABLE>

<PAGE>

ANNEX  B

                                 ACC CORPORATION

                                  COMMON SHARES
<TABLE>
<CAPTION>
DATE                PURCHASE          SALE       PRICE PER SHARE       DAILY TOTALS
- ----                --------          ----       ---------------        -----------
<S>                   <C>             <C>             <C>                 <C>
03.08.96                                              B/Fwd               188,100
03.20.96              15,100                          27.25               203,200
03.22.96                              3,000           27.25
                       3,000                          27.25
                       9,800                          27.50               213,000
03.25.96                 105                          28.25               213,105
03.29.96               1,200                          29.125              214,305
04.04.96                              7,900           28.875              206,405
04.19.96              15,000                          32.292              221,405
04.23.96              10,800                          34.00               232,205
04.30.96              20,000                          34.00               252,205
05.02.96             120,000                          33.75               372,205
05.03.96              14,500                          35.2543             386,705
05.08.96               8,000                          39.00               394,705
</TABLE>


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