Exhibit 4.1

                          REGISTRATION RIGHTS AGREEMENT


     REGISTRATION  RIGHTS  AGREEMENT  dated as of March  29,  2000 by and  among
Perini Corporation,  a Massachusetts  corporation (together with its successors,
the "Company"),  Tutor-Saliba  Corporation,  a California  corporation  ("TSC"),
Ronald N. Tutor ("RNT"),  National  Union Fire Insurance  Company of Pittsburgh,
PA, a Pennsylvania  corporation ("National Union"), and O&G Industries,  Inc., a
Connecticut  corporation  (("O&G"),  BLUM Capital  Partners,  L.P., a California
limited  partnership  ("BLUM"),  PB Capital  Partners,  L.P., a Delaware limited
partnership ("PB Capital"), The Common Fund for Non-Profit Organizations,  a New
York  non-profit  corporation  ("The  Common  Fund"),  and The Union  Labor Life
Insurance  Company,  a  Maryland  corporation  acting on behalf of its  Separate
Account P ("ULLICO"  and  collectively  with TSC,  RNT,  AIG,  O&G,  BLUM and PB
Capital the "Shareholders").

     WHEREAS,  pursuant to the terms and conditions of the  Securities  Purchase
Agreement dated as of February 5, 2000 (the  "Securities  Purchase  Agreement"),
among  the  Company  and the  Shareholders,  TSC,  National  Union and O&G shall
acquire shares of common stock, par value $1.00 per share, of the Company on the
Closing (as defined in the Securities  Purchase  Agreement),  in the amounts set
forth opposite each name on Exhibit 2.01 thereto;

     WHEREAS,  pursuant  to the  terms  of the  exchange  agreement  dated as of
February 7, 2000,  between the Company and ULLICO,  the exchange agreement dated
as of Februry 14,  2000,  between the Company and PB Capital,  and the  exchange
agreement  dated as of  February  14,  2000,  between the Company and The Common
Fund,  such holders have agreed to exchange  their Series B Preferred  Stock for
Common Stock of the Company; and

     WHEREAS,  the Company has agreed with the  Shareholders  to provide certain
rights as set forth herein.

     NOW THEREFORE,  for valuable consideration,  the receipt and sufficiency of
which is hereby acknowledged, the parties hereto agree as follows:


                                    ARTICLE I

                                   DEFINITIONS

     SECTION 1.1.  Definitions.  Unless otherwise defined herein,  the following
terms used in this Agreement shall have the meanings specified below.

     (a) "BLUM" has the meaning set forth in the introductory paragraph hereof.

                                       1


     (b) "Business Day" means any day except a Saturday,  Sunday or other day on
which  commercial  banks in New York City are required or  authorized  by law to
close.

     (c) "The  Common  Fund"  has the  meaning  set  forth  in the  introductory
paragraph hereof.

     (d) "Common  Stock" means the common stock,  par value $1.00 per share,  of
the Company.

     (e)  "Company"  has the  meaning  set forth in the  introductory  paragraph
hereof.

     (f) "Deferral Period" means the period during which the Company has elected
to postpone the sale or other transfer of Registrable  Securities by the holders
thereof  pursuant to the applicable terms of Article II of this Agreement or any
other  period  during  which  a  stop  order  or  other  order   suspending  the
effectiveness of a Registration Statement is in effect.

     (g)  "Effectiveness  Period" means the period commencing on the date hereof
and  ending on the date that all  Shares  shall  have  ceased to be  Registrable
Securities.

     (h) "Exchange Act" means the  Securities  Exchange Act of 1934, as amended,
or  any  successor  Federal  statute,  and  the  rules  and  regulations  of the
Commission thereunder, all as the same shall be in effect at the time. Reference
to a particular  section of the Securities  Exchange Act of 1934 shall include a
reference  to the  comparable  section,  if any, of any such  successor  Federal
statute.

     (i) "Managing Underwriters" means the investment banking firm or firms that
shall manage or co-manage an Underwritten Offering.

     (j)  "National  Union"  has  the  meaning  set  forth  in the  introductory
paragraph hereof.

     (k) "Notice Holder" means a holder of Registrable  Securities who has given
notice of the intention to distribute  such holder's  Registrable  Securities in
accordance with Section 2.1(d), 2.2 or 2.3, as the case may be.

     (l) "O&G" has the meaning set forth in the introductory paragraph hereof.

     (m) "PB  Capital" has the meaning set forth in the  introductory  paragraph
hereof.

                                       2



     (n) "Person" means an individual, a corporation,  a partnership,  a limited
liability partnership,  a limited liability company, an association,  a trust or
any  other  entity  or   organization,   including  a  government  or  political
subdivision or an agency or instrumentality thereof.

     (o)  "Prospectus"  means  the  prospectus   included  in  any  Registration
Statement   (including,   without   limitation,   a  prospectus  that  discloses
information  previously  omitted from a prospectus filed as part of an effective
Registration  Statement  in  reliance  upon  Rule  430A  promulgated  under  the
Securities  Act),  as amended or  supplemented  by any  amendment or  prospectus
supplement,  including post-effective  amendments, and all material incorporated
by reference or deemed to be incorporated by reference in such Prospectus.

     (p)  "Public  Sale"  means any sale of Shares to the public  pursuant to an
offering  registered under the Securities Act or to the public through a broker,
dealer or market maker  pursuant to the provisions of Rule 144 (or any successor
provision then in effect) adopted under the Securities Act.

     (q) "Registrable  Securities" means Shares until the date (if any) when (i)
such Shares shall have been sold or  transferred  pursuant to a Public Sale, and
transferred  or  exchanged  and new  certificates  for them not bearing a legend
restricting further transfer shall have been delivered by the Company or (ii) if
requested to do so, the Company  would be required to deliver  certificates  for
such  Shares not  bearing a legend  restricting  further  transfer  (other  than
legends  required  under  Section  2.06  of  the  Shareholders'   Agreement,  if
applicable),  and, in each case,  subsequent  sale or other  disposition of such
Shares shall not require  registration or qualification under the Securities Act
or any similar state or foreign law then in force.

     (r)  "Registration  Statement"  means  any  registration  statement  of the
Company  which  covers  any  of  the  Registrable  Securities  pursuant  to  the
provisions  of  this  Agreement,   including  the  Prospectus,   amendments  and
supplements to such registration statement, including post-effective amendments,
amendments and supplements to such Prospectus, all exhibits, and all information
incorporated  by  reference  or deemed to be  incorporated  by reference in such
registration statement.

     (s)  "Restricted  Securities"  means the Shares;  provided that  particular
Shares shall cease to be Restricted  Securities when such securities  shall have
(x) been sold or  transferred  pursuant to a Public Sale, or (y) been  otherwise
transferred  or  exchanged  and new  certificates  for them not bearing a legend
restricting  further  transfer  shall have been  delivered  by the  Company  and
subsequent  disposition of them shall not require  registration or qualification
of them under the  Securities  Act or any  similar  state or foreign law then in
force or (z) ceased to be outstanding.

     (t) "RNT" has the meaning set forth in the introductory paragraph hereof.

                                       3

     (u) "Rule 144" means Rule 144 under the Securities Act, as such Rule may be
amended from time to time, or any similar rule or regulation  hereafter  adopted
by the SEC.

     (v) "Rule 144A" means Rule 144A under the Securities  Act, as such Rule may
be  amended  from time to time,  or any  similar  rule or  regulation  hereafter
adopted by the SEC.

     (w) "SEC" means the Securities and Exchange Commission or any other Federal
agency at the time administering the Securities Act.

     (x) "Securities  Act" means the Securities Act of 1933, as amended,  or any
successor  Federal  statute,  and the rules and  regulations  of the  Commission
thereunder,  all as the same  shall be in  effect at the  time.  Reference  to a
particular  section of the  Securities  Act of 1933 shall include a reference to
the comparable section, if any, of any such successor Federal statute.

     (y)  "Securities  Purchase  Agreement"  has the  meaning  set  forth in the
recitals.

     (z) "Selling  Period" means the period during which a holder of Registrable
Securities  shall be entitled to sell its Shares pursuant to a Prospectus  under
the applicable provision of Article II of this Agreement.

     (aa)"Shares"  means shares of Common Stock of the Company (including shares
of Common Stock issued from time to time on conversion or exchange of securities
of the Company),  currently held, or subsequently  acquired, by a Shareholder or
transferee of, or successor to, a Shareholder,  as adjusted for any other shares
of Common  Stock or  securities  issued in respect of such shares or  securities
because   of   stock   splits,    reverse   stock   splits,   stock   dividends,
reclassifications,  recapitalizations,  merger, consolidation, share exchange or
similar events.

     (bb)"Shareholders"  has the meaning set forth in the introductory paragraph
hereof.

     (cc)"Shareholders'  Agreement" means that certain  Shareholders'  Agreement
dated even date herewith among the Shareholders and the Company.

     (dd)"Special  Counsel" means any law firm retained from time to time by the
holders of five percent (5%) or more of the  Registrable  Securities  to be sold
pursuant to a Registration  Statement or during any Selling Period,  as shall be
specified by such holders to the Company;  provided  that at no time there shall
be more than one Special  Counsel the fees and expenses of which will be paid by
the Company pursuant to Section 2.4.

                                       4

     (ee)"ULLICO"  has the  meaning  set  forth  in the  introductory  paragraph
hereof.

     (ff)"Underwritten  Offering"  means a  registration  in  which  Registrable
Securities are sold or to be sold to one or more  underwriters for reoffering to
the public.

     Each of the  following  terms is defined in the Section set forth  opposite
such term:

              Term                                   Section
              ----                                   -------

     "Demand Holders"                                2.2(a)

     "Demand Registration"                           2.2(a)

     "Filing Date"                                   2.1(a)

     "Initial Shelf Registration"                    2.1(a)

     "Initiating Holders"                            2.1(a)

     "Piggyback Registration"                        2.3(a)

     "Saleable Number"                               3.1(a)

     "Shelf Registration"                            2.1(a)

     "Subsequent Shelf Registration"                 2.1(b)


                                   ARTICLE II

                               REGISTRATION RIGHTS

     SECTION 2.1 Shelf Registration.

     (a) As soon as  practicable  but in any event not later  than the date (the
"Filing Date") that is thirty (30) days, in the case of a Registration Statement
on Form S-3 (or successor or replacement  form) and sixty (60) days, in the case
of a Registration Statement on Form S-1 (or other available form), after receipt
by the  Company  of a written  request by the holder or holders of not less than
five percent (5%) of the Registrable Securities (the "Initiating Holders"),  the
Company  shall  prepare and file with the SEC a  Registration  Statement  for an
offering to be made on a delayed or continuous basis pursuant to Rule 415 of the
Securities Act (a "Shelf Registration") registering the resale from time to time
by the  holders  of  all  of the  Registrable  Securities  (the  "Initial  Shelf
Registration").  The Registration  Statement for any Shelf Registration shall be
on  Form  S-3  or  another  available  form  permitting   registration  of  such
Registrable  Securities

                                       5

for  resale  by  such  holders  in the  manner  or  manners  designated  by them
(including, without limitation, one or more Underwritten Offerings). The Company
shall use all  commercially  reasonable  best efforts to cause the Initial Shelf
Registration  to become  effective  under the  Securities  Act as promptly as is
practicable and to keep the Initial Shelf  Registration  continuously  effective
under the Securities Act until the end of the Effectiveness Period.

     (b) If the Initial Shelf  Registration or any Subsequent Shelf Registration
(as defined  below) ceases to be effective for any reason at any time during the
Effectiveness  Period (other than because all Registrable  Securities shall have
been sold or shall have ceased to be Registrable Securities),  the Company shall
use all commercially  reasonable best efforts to obtain the prompt withdrawal of
any order suspending the  effectiveness  thereof,  and in any event shall within
thirty (30) days of such cessation of effectiveness amend the Shelf Registration
in a manner reasonably expected to obtain the withdrawal of the order suspending
the effectiveness thereof, or file an additional Shelf Registration covering all
of  the  Registrable  Securities  (a  "Subsequent  Shelf  Registration").  If  a
Subsequent  Shelf  Registration is filed, the Company shall use all commercially
reasonable  best efforts to cause the Subsequent  Shelf  Registration  to become
effective  as  promptly  as is  practicable  after such  filing and to keep such
Registration Statement continuously effective until the end of the Effectiveness
Period.

     (c) The  Company  shall  supplement  and amend the  Shelf  Registration  if
required  by  the  rules,   regulations  or   instructions   applicable  to  the
registration form used by the Company for such Shelf  Registration,  if required
by  the  Securities  Act,  or if  reasonably  requested  by  any  holder  of the
Registrable Securities covered by such Registration Statement or by any Managing
Underwriter of such Registrable Securities.

     (d) Each holder of Registrable  Securities agrees that if it wishes to sell
any  Registrable  Securities  pursuant  to  a  Shelf  Registration  and  related
Prospectus,  it will do so only in  accordance  with this Section  2.1(d).  Each
holder of Registrable Securities agrees to give written notice to the Company at
least six (6) Business Days prior to any intended  distribution  of  Registrable
Securities under the Shelf Registration,  which notice shall specify the date on
which such holder intends to begin such  distribution  and any information  with
respect to such holder and the intended  distribution of Registrable  Securities
by such holder required to amend or supplement the  Registration  Statement with
respect to such intended distribution of Registrable  Securities by such holder;
provided that no holder may give such notice  unless such notice,  together with
notices given by other holders of Registrable  Securities joining in such notice
or giving similar notices,  covers at least five percent (5%) of the Registrable
Securities.  As  promptly  as is  practicable  after  the date  such  notice  is
provided,  and in any event within five (5) Business  Days after such date,  the
Company shall either:

          (i) (A) prepare and file with the SEC a  post-effective  amendment  to
     the Shelf  Registration  or a  supplement  to the related  Prospectus  or a
     supplement or amendment to any document  incorporated  therein by reference
     or any other required  document,  so that such Registration  Statement will
     not  contain  any

                                       6

     untrue  statement  of a  material  fact or omit to  state a  material  fact
     required to be stated therein or necessary to make the  statements  therein
     not misleading,  and so that, as thereafter  delivered to purchasers of the
     Registrable  Securities  being sold  thereunder,  such  Prospectus will not
     contain any untrue statement of a material fact or omit to state a material
     fact  required to be stated  therein or  necessary  to make the  statements
     therein,  in light of the  circumstances  under  which they were made,  not
     misleading;  (B) provide each Notice Holder a copy of any  documents  filed
     pursuant to Section  2.1(d)(i)(A);  and (C) inform each Notice  Holder that
     the Company has complied with its obligations in Section  2.1(d)(i)(A)  and
     that the Registration  Statement and related Prospectus may be used for the
     purpose of selling all or any of such  Registrable  Securities (or that, if
     the Company has filed a post-effective  amendment to the Shelf Registration
     which has not yet been  declared  effective,  the Company  will notify each
     Notice Holder to that effect,  will use all  commercially  reasonable  best
     efforts to secure the  effectiveness of such  post-effective  amendment and
     will immediately so notify each Notice Holder when the amendment has become
     effective);  each Notice  Holder  will sell all or any of such  Registrable
     Securities  pursuant to the Shelf  Registration and related Prospectus only
     during the sixty (60) day period in the case of  registration  on Form S-3,
     or the ninety (90) day period in the case of registration on any other form
     available for  registration,  commencing with the date on which the Company
     gives  notice  (such sixty (60) or ninety (90) day period,  as the case may
     be, to be calculated  without regard to any Deferral  Period),  pursuant to
     Section 2.1(d)(i)(C), that the Registration Statement and Prospectus may be
     used for such purpose;  each Notice Holder agrees that it will not sell any
     Registrable   Securities   pursuant  to  such  Registration   Statement  or
     Prospectus  after  such  Selling  Period  without  giving a new  notice  of
     intention to sell pursuant to Section 2.1(d) hereof and receiving a further
     notice from the Company pursuant to Section 2.1(d)(i)(C) hereof; or

          (ii) if, in the  judgment of the  Company,  it is advisable to suspend
     use of the  Prospectus  for a  period  of  time  due  to  pending  material
     corporate  developments  or similar  material events that have not yet been
     publicly  disclosed and as to which the Company believes public  disclosure
     will be prejudicial to the Company, the Company shall deliver a certificate
     in writing,  signed by its Chief Executive Officer, Chief Financial Officer
     or General  Counsel,  to the Notice  Holders,  the Special  Counsel and the
     Managing  Underwriters,  if any, to the effect of the  foregoing  and, upon
     receipt of such certificate,  each such Notice Holder's Selling Period will
     not  commence  until  such  Notice  Holder's   receipt  of  copies  of  the
     supplemented  or amended  Prospectus  provided for in Section  2.1(d)(i)(A)
     hereof,  or  until  it is  advised  in  writing  by the  Company  that  the
     Prospectus  may be used,  and has  received  copies  of any  additional  or
     supplemental  filings  that are  incorporated  or  deemed  incorporated  by
     reference  in such  Prospectus.  The  Company  will  use  all  commercially
     reasonable  best  efforts to ensure that the use of the  Prospectus  may be
     resumed,  and the  Selling  Period will  commence,  upon the earlier of (x)
     public disclosure of such pending material corporate development or similar
     material event or (y) a determination  by the Company

                                       7



     that,  in the judgment of the Company,  public  disclosure of such material
     corporate development or similar material event would not be prejudicial to
     the Company. Notwithstanding the foregoing, the Company shall not under any
     circumstances be entitled to exercise its right under Section 2.1(d)(ii) to
     defer the  commencement of a Selling Period more than one time in any three
     (3)-month  period or two times in any  twelve  (12)-month  period,  and the
     period in which a Selling Period is suspended shall not exceed fifteen (15)
     days  unless the  Company  shall  deliver to such  Notice  Holders a second
     certificate  to the effect set forth above,  which shall have the effect of
     extending the period during which such Selling  Period is deferred by up to
     an  additional  fifteen  (15) days,  or such  shorter  period of time as is
     specified  in such  second  certificate.  In no event  shall the Company be
     permitted to extend the period during which such Selling Period is deferred
     from and after the date a Notice Holder  provides  notice to the Company in
     accordance   with  Section   2.1(d)(ii)  of  its  intention  to  distribute
     Registrable Securities beyond such thirty (30)-day period.

     SECTION 2.2 Demand Registration.

     (a) At any time during the Effectiveness  Period,  any holder or holders of
Registrable  Securities  (the "Demand  Holders") may request in writing that the
Company file a  Registration  Statement  under the  Securities  Act covering the
registration of all or a portion of the Registrable  Securities then held by the
Demand  Holders (a "Demand  Registration").  After the date on which the Company
receives such a request, the Company shall use all commercially  reasonable best
efforts (i) to file a  Registration  Statement  under the  Securities Act on the
appropriate form (using Form S-3 or other "short form," if available and advised
by counsel) covering all of the Registrable  Securities specified by the holders
within  forty-five (45) days after the date of such request (thirty (30) days in
the case of a Form S-3) and  (ii) to  cause such  Registration  Statement  to be
declared effective within sixty (60) days (forty-five (45) days in the case of a
Form S-3) after the filing referenced in clause (i) above. The Company will keep
the Demand  Registration  current and effective for at least one hundred  twenty
(120) days (such one hundred  twenty (120) day period to be  calculated  without
regard to any Deferral  Period),  or a shorter  period  during which the holders
shall have sold all Registrable Securities covered by the Demand Registration.

     (b) In the  event a holder  of  Registrable  Securities  makes a demand  to
register  pursuant to Section 2.2 and later  determines not to sell  Registrable
Securities pursuant to such registration, the Company shall cease all efforts to
secure registration for such holder's Registrable  Securities and shall take all
action  necessary  to  prevent  the   commencement  of  effectiveness   for  any
registration  that it is  preparing  or has  prepared  in  connection  with  the
withdrawn request,  and such holder's Demand Registration shall be reinstated as
if never exercised;  provided, however, that such holder withdrawing such demand
shall pay all of the costs and  expenses  incurred by the Company in  connection
with such withdrawn demand, unless the withdrawal is a result of a breach by the
Company of its obligations under this Agreement.

                                       8

     (c)  National  Union  shall be  entitled  to two (2)  Demand  Registrations
pursuant to Section 2.2, provided that it shall not be entitled to exercise more
than one (1) Demand Registrations during any twelve (12)-month period. TSC, O&G,
ULLICO and BLUM  (together  with The Common Fund and PB Capital) shall each have
one (1) Demand Registration right pursuant to Section 2.2.

     (d)  Notwithstanding  the  provisions  of Section  2.2,  if the  Company is
requested to file any registration under Section 2.2:

          (i) The  Company  shall  have  the  right  to defer  the  filing  of a
     Registration  Statement relating to a Demand Registration during the ninety
     (90) days following the effective date of any other Registration  Statement
     pertaining to an underwritten public offering of securities for the account
     of the Company or security  holders of the Company or such  earlier date as
     such distribution shall be completed; or

          (ii) The  Company  shall  have the  right to defer  the  filing  after
     receipt  of the  Demand  Holders  request  or if a  Registration  Statement
     relating to a Demand  Registration  has already been filed, the Company may
     cause the Registration  Statement to be withdrawn and its  effectiveness to
     be terminated,  or may postpone  amending or supplementing the Registration
     Statement,  until the Board of Directors  determines that the circumstances
     requiring  the  withdrawal  or  postponement  no longer  exist,  if, in the
     judgment  of  the  Company,  (i)  it is  advisable  to  suspend  use of the
     Prospectus  for  a  period  of  time  due  to  pending  material  corporate
     developments  or similar  material  events that have not yet been  publicly
     disclosed and as to which the Company  believes  public  disclosure will be
     prejudicial  to the Company or (ii) the Board of  Directors  of the Company
     determines in good faith that there is a valid  business  purpose or reason
     for delaying  such filing or  effectiveness.  The Company  shall  deliver a
     certificate  in  writing,  signed by its  Chief  Executive  Officer,  Chief
     Financial  Officer  or  General  Counsel,  to the  holders  of  Registrable
     Securities,  the Special Counsel and the Managing Underwriters,  if any, to
     the effect of the  foregoing  and, upon receipt of such  certificate,  each
     such holder's  Selling Period will not commence until such holder's receipt
     of copies of a supplemented or amended  Prospectus,  or until it is advised
     in writing by the Company that the Prospectus may be used, and has received
     copies of any additional or supplemental  filings that are  incorporated or
     deemed  incorporated by reference in such Prospectus.  The Company will use
     all  commercially  reasonable  best  efforts to ensure  that the use of the
     Prospectus may be resumed,  and the Selling Period will commence,  upon the
     earlier  of (x)  public  disclosure  of  such  pending  material  corporate
     development or similar material event or (y) a determination by the Company
     that,  in the judgment of the Company,  public  disclosure of such material
     corporate development or similar material event would not be prejudicial to
     the Company. Notwithstanding the foregoing, the Company shall not under any
     circumstances  be  entitled  to  exercise  its  right  under  this  Section

                                       9


     2.2(d)(ii) to defer the  commencement  of a Selling  Period more than sixty
     (60) days during any twelve (12)-month period.

     (e) A Demand  Registration  shall  not count as such  until a  Registration
Statement becomes effective;  provided,  that if, after it has become effective,
the offering  pursuant to the  Registration  Statement is interfered with by any
stop order,  injunction  or other order or  requirement  of the SEC or any other
governmental  authority,  such  registration  shall be  deemed  not to have been
effected  unless such stop order,  injunction or other order shall  subsequently
have  been  vacated  or  otherwise  removed  within  fifteen  (15)  days  of the
imposition thereof.

     (f) The  Demand  Holders  shall  select  the  underwriter  or  underwriters
(including   Managing   Underwriter)  of  any  offering  pursuant  to  a  Demand
Registration,  subject to the approval of the Company,  which approval shall not
be unreasonably withheld.

     SECTION 2.3 Piggyback Registration.

     (a) Subject to applicable stock exchange rules and securities  regulations,
at least  thirty  (30) days prior to any public  offering  of any of its capital
stock of the Company for the account of the Company or any other  Person  (other
than a Registration  Statement on Form S-4 or S-8 (or any successor  forms under
the  Securities  Act),   relating  solely  to  employee  benefit  plans  or  any
transaction governed by Rule 145 of the Securities Act or Registration Statement
filed pursuant to the Shelf  Registration under Section 2.1 of this Agreement or
any substantially  comparable shelf registration right granted by the company to
any shareholder not a party to this  Agreement),  the Company shall give written
notice of such  proposed  filing and of the proposed date thereof to the holders
and if, on or before the twentieth  (20th) day (or such earlier day specified if
registration is for the account of any other Person) following the date on which
such notice is given, (i) a Registration  Statement  covering the sale of all of
the Registrable Securities is not then effective and available for sales thereof
by the holders and (ii) the Company  shall  receive  written  requests  from any
holders of Registrable  Securities requesting that the Company include among the
securities covered by such Registration  Statement any or all of the Registrable
Securities for offering,  specifying the amount of Registrable  Securities  that
such holder intends to sell and such holder's  intended method of  distribution,
the Company  shall  include such  Registrable  Securities  in such  Registration
Statement,  if filed, so as to permit such Registrable  Securities to be sold or
disposed of in the manner and on the terms of the offering  thereof set forth in
such request.  Each such  registration  shall hereinafter be called a "Piggyback
Registration."  The  Company  shall  select  the  underwriter  or  underwriters,
including  Managing  Underwriter,  of any  offering  pursuant to a  Registration
Statement  filed  pursuant  to this  Section  2.3,  provided  that any  selected
underwriter  shall  be a  well-recognized  firm in  good  standing  of  national
reputation.

     (b) Upon receipt of a request for Piggyback Registration, the Company shall
use all commercially reasonable best efforts to cause all Registrable Securities
which the Company has been  requested  to  register to be  registered  under the
Securities Act to the extent

                                       10


necessary  to permit  their sale or other  disposition  in  accordance  with the
intended  methods of  distribution  specified  in the  request  of such  holder;
provided, however, that the Company shall have the right, prior to the effective
date of the Registration  Statement, to postpone or withdraw such a registration
effected pursuant to this Section 2.3 without  obligation to the holders,  other
than the  Company's  obligation  to pay the expenses  incurred by the holders in
connection with the registration; provided, further, that if the registration is
pursuant  to a Demand  Registration,  the  Company  shall only have the right to
defer the registration in accordance with Section 2.2(d).  In the event a holder
of Registrable  Securities  makes a demand to register  pursuant to this Section
2.3 and later  determines not to sell  Registrable  Securities  pursuant to such
registration,  the Company  shall cease all efforts to secure  registration  for
such holder's Registrable Securities.

     (c)  If  such   registration   being  effected   pursuant  to  a  Piggyback
Registration  is  a  Company  registration  or a  registration  pursuant  to  an
underwritten  offering,  the shares of Common Stock  available for sale shall be
allocated in accordance with Article III of this Agreement.

     (d) No registration effected under Section 2.3 shall relieve the Company of
its obligation to effect a demand  registration under Section 2.2, nor shall any
registration  under  this  Section  2.3 be deemed to have  been  effected  under
Section 2.2.


                                   ARTICLE III

                              UNDERWRITERS' CUTBACK

     SECTION 3.1 Underwriter's Cutback.

     (a) If, in connection with any underwritten public offering for the account
of the Company, the Managing Underwriter(s) thereof shall impose a limitation on
the  number of  shares of Common  Stock  (the  "Saleable  Number")  which may be
included in the  Registration  Statement  that is less than all of the shares of
Common Stock sought to be registered because,  in such Managing  Underwriter(s)'
commercially  reasonable  judgment,  marketing  or other  factors  dictate  such
limitation is necessary to facilitate public  distributions,  then the number of
shares of Common  Stock  offered  shall be limited to the Saleable  Number.  The
Company will promptly so advise each holder of Registrable  Securities  that has
requested  registration,  and  will  include  shares  of  Common  Stock  in such
registration in the following order of priority:  (A) the shares of Common Stock
the Company  desires to include in such  registration  up to the total number of
shares sought to be registered;  (B) the Registrable Securities that the holders
desire to include in such  registration up to the total sought to be registered;
and (C) the balance of securities,  if any, to be registered by other holders of
the Company's  Common Stock to the extent such security  holders have  piggyback
registration  rights  and  have  sought  to  include  their  securities  in such
registration,  in each case until the aggregate number of shares of Common Stock
included  in such  registration  is equal to the

                                       11


number thereof that, in the opinion of such Managing Underwriter(s), can be sold
without adversely affecting the marketability thereof.

     (b) If, in connection with any underwritten public offering for the account
of any security holder of the Company  exercising its demand  registration right
(other than the holder of Registrable Securities), the Saleable Number which may
be  included  in the  Registration  Statement  is less than all of the shares of
Common Stock sought to be registered  because,  in the Managing  Underwriter(s)'
commercially  reasonable  judgment,  marketing  or other  factors  dictate  such
limitation is necessary to facilitate public  distributions,  then the number of
securities  offered  shall be limited to the Saleable  Number.  The Company will
promptly so advise  each holder of  Registrable  Securities  that has  requested
registration,  and will include in such  registration  in the following order of
priority:  (A) the shares of Common Stock sought to be  registered by holders of
the Company's  Common Stock who have exercised their demand  registration  right
(to the extent the holders exercising such rights possessed such rights prior to
the date hereof);  (B) the  Registrable  Securities  that the holders  desire to
include in such  registration  up to the total sought to be  registered  and the
shares of Common  Stock  sought to be  registered  by holders  of the  Company's
Common Stock who have exercised their demand  registration  right (to the extent
the holders  exercising  such rights  obtained  such rights on or after the date
hereof);  (C) any  securities  to be  registered  for the account of the Company
together  with the  balance of  securities,  if any, to be  registered  by other
holders of the Company's  Common Stock to the extent such security  holders have
piggyback  registration  rights and have sought to include  their  securities in
such  registration,  in each case until the aggregate number of shares of Common
Stock included in such  registration is equal to the number thereof that, in the
opinion of such Managing Underwriter(s), can be sold without adversely affecting
the marketability thereof.

     (c) If, in connection with any underwritten public offering for the account
of the holders of Registrable  Securities  pursuant to their Demand Registration
right,  as the case may be, the  Saleable  Number  which may be  included in the
Registration  Statement is less than all of the shares of Common Stock sought to
be registered because, in such underwriter(s)' commercially reasonable judgment,
marketing or other  factors  dictate such  limitation is necessary to facilitate
public  distributions,  then the Company will  promptly so advise each holder of
Registrable Securities that has requested registration, and will include in such
registration in the following order of priority: (A) the Registrable Shares that
the holders who have exercised their Demand Registration right desire to include
in such  registration;  (B) the shares of  Registrable  Securities  sought to be
registered by holders  exercising their Piggyback  Registration  rights; and (C)
any securities to be registered for the account of the Company together with the
balance  of  securities,  if any,  to be  registered  by  other  holders  of the
Company's  Common  Stock to the extent  such  security  holders  have  piggyback
registration  rights  and  have  sought  to  include  their  securities  in such
registration,  in each case until the aggregate number of shares of Common Stock
included  in such  registration  is equal to the  number  thereof  that,  in the
opinion of such Managing Underwriter(s), can be sold without adversely affecting
the marketability thereof.

                                       12



     (d)  If  the  number  of  shares  of  Common   Stock   that  the   Managing
Underwriter(s)  advise the  Company  can be  registered  is less than all of the
Registrable  Securities  that the holders have sought to  register,  each holder
requesting registration pursuant to rights granted under this Agreement shall be
allocated the number of Registrable  Securities  eligible for  registration  pro
rata  in  proportion  to the  number  of  Registrable  Securities  sought  to be
registered  under the applicable  Registration  Statement  without regard to the
securities held by holders who have not sought registration.


                                   ARTICLE IV

                             REGISTRATION PROCEDURES

     SECTION 4.1  Registration  Procedures.  In  connection  with the  Company's
registration  obligations under Article II hereof, the Company shall effect such
registrations  to permit the sale of the  Registrable  Securities  in accordance
with the intended method or methods of disposition thereof, and pursuant thereto
the Company shall as expeditiously as possible:

     (a) Prepare and file with the SEC a Registration  Statement or Registration
Statements  on the form  specified  in this  Agreement  or,  if no form has been
specified,  on any  appropriate  form under the Securities Act available for the
sale of the Registrable Securities by the holders thereof in accordance with the
intended method or methods of  distribution  thereof,  and use all  commercially
reasonable  best  efforts to cause each such  Registration  Statement  to become
effective and remain effective as provided herein;  provided, that before filing
any such  Registration  Statement or Prospectus or any amendments or supplements
thereto  (other  than  documents  that  would be  incorporated  or  deemed to be
incorporated therein by reference and that the Company is required by applicable
securities  laws or stock  exchange  requirements  to file)  the  Company  shall
furnish to the holders of Registrable  Securities,  the Special  Counsel and the
Managing  Underwriters  of such offering,  if any,  copies of all such documents
proposed  to be filed,  which  documents  will be  subject  to the review of the
holders  of  Registrable  Securities,  the  Special  Counsel  and such  Managing
Underwriters,  and the Company shall not file any such Registration Statement or
amendment  thereto or any Prospectus or any supplement  thereto (other than such
documents which, upon filing, would be incorporated or deemed to be incorporated
by reference  therein and that the Company is required by applicable  securities
laws or stock exchange  requirements to file) to which the holders of a majority
of the  Registrable  Securities  covered by such  Registration  Statement or the
Special Counsel shall reasonably  object in writing within two (2) full Business
Days after receipt of such materials.

     (b)  Prepare  and  file  with the SEC such  amendments  and  post-effective
amendments  to each  Registration  Statement  as may be  necessary  to keep such
Registration   Statement   continuously  effective  for  the  applicable  period
specified in Article II; cause the related  Prospectus to be supplemented by any
required Prospectus  supplement,  and as so supplemented to be filed pursuant to
Rule 424 (or any similar

                                       13


provisions  then in  force)  under  the  Securities  Act;  and  comply  with the
provisions  of  the  Securities  Act  with  respect  to the  disposition  of all
securities  covered by such Registration  Statement during the applicable period
in accordance  with the intended  methods of disposition by the sellers  thereof
set forth in such Registration  Statement as so amended or such Prospectus as so
supplemented.

     (c) Notify the  selling  holders of  Registrable  Securities,  the  Special
Counsel and the Managing  Underwriters,  if any, promptly,  and (if requested by
any such person)  confirm  such notice in writing,  (i) when a  Prospectus,  any
Prospectus   supplement,   a   Registration   Statement,   an   amendment  or  a
post-effective  amendment to a  Registration  Statement  has been filed with the
SEC,  and,  with  respect  to a  Registration  Statement  or any  post-effective
amendment, when the same has become effective, (ii) of any request by the SEC or
any other federal or state governmental  authority for amendments or supplements
to a Registration Statement or related Prospectus or for additional information,
and of the  contents of such  request,  (iii) of the  issuance by the SEC or any
other federal or state  governmental  authority of any stop order suspending the
effectiveness  of a  Registration  Statement or the initiation or threatening of
any  proceedings  for that  purpose,  (iv) of the  receipt by the Company of any
notification  with respect to the suspension of the  qualification  or exemption
from  qualification  of  any of  the  Registrable  Securities  for  sale  in any
jurisdiction  or the  initiation  or  threatening  of any  proceeding  for  such
purpose,  (v) of the existence of any fact or happening of any event which makes
any  statement  of a material  fact in such  Registration  Statement  or related
Prospectus or any document  incorporated or deemed to be incorporated therein by
reference  untrue  or which  would  require  the  making of any  changes  in the
Registration  Statement  or  Prospectus  in  order  that,  in  the  case  of the
Registration  Statement,  it will not contain any untrue statement of a material
fact or omit to state  any  material  fact  required  to be  stated  therein  or
necessary to make the statements therein not misleading, and that in the case of
the Prospectus,  it will not contain any untrue  statement of a material fact or
omit to state any material  fact or omit to state any material  fact required to
be stated therein or necessary to make the statements  therein,  in the light of
the circumstances under which they were made, not misleading,  provided that the
Company  shall not be required  to  disclose  such fact or event if such fact or
event has not been, and is not required to be, publicly  disclosed,  and (vi) of
the Company's  determination  that a post-effective  amendment to a Registration
Statement or supplement to a Prospectus would be appropriate.

     (d) Use all  commercially  reasonable best efforts to obtain the withdrawal
of any order suspending the  effectiveness of a Registration  Statement,  or the
lifting of any suspension of the qualification (or exemption from qualification)
of any of the  Registrable  Securities  for  sale  in any  jurisdiction,  at the
earliest possible moment.

     (e) If  reasonably  requested by a holder of  Registrable  Securities,  the
Special Counsel, the Managing Underwriters,  if any, or requested by the holders
of a majority of the Registrable Securities being sold, (i) promptly incorporate
in a  Prospectus  supplement  or  amendment  or  post-effective  amendment  to a
Registration   Statement   such   information  as  the  holders  of  Registrable
Securities,  the Special  Counsel,  the Managing  Underwriters,

                                       14


if any,  or such  holders,  in  connection  with  any  offering  of  Registrable
Securities,  agree should be included therein as required by applicable law, and
(ii) make all required  filings of such Prospectus  supplement or such amendment
or post-effective  amendment as promptly as is practicable after the Company has
received  notification  of the  matters to be  incorporated  in such  Prospectus
supplement or post-effective amendment;  provided, that the Company shall not be
required  to take any  actions  under this  Section  4.1(e) that are not, in the
reasonable opinion of counsel for the Company, in compliance with or required by
applicable law.

     (f) Furnish to each selling holder of Registrable  Securities,  the Special
Counsel,  and each Managing  Underwriter,  if any, without charge,  at least one
conformed  copy of the  Registration  Statement or Statements  and any amendment
thereto,  including financial statements but excluding schedules,  all documents
incorporated or deemed to be incorporated  therein by reference and all exhibits
(unless  requested  in  writing by such  holder,  Special  Counsel  or  Managing
Underwriter).

     (g) Deliver to each selling holder of Registrable  Securities,  the Special
Counsel, and each Managing Underwriter,  if any, in connection with any offering
of Registrable  Securities,  without charge, as many copies of the Prospectus or
Prospectuses relating to such Registrable Securities (including each preliminary
prospectus)  and  any  amendment  or  supplement  thereto  as such  persons  may
reasonably  request;  and  the  Company  hereby  consents  to the  use  of  such
Prospectus  or each  amendment  or  supplement  thereto  by each of the  selling
holders of Registrable  Securities and the  underwriters,  if any, in connection
with  any  offering  and  sale of the  Registrable  Securities  covered  by such
Prospectus or any amendment or supplement thereto.

     (h) Prior to any public offering of Registrable Securities,  to register or
qualify or cooperate  with the selling  holders of Registrable  Securities,  the
Managing  Underwriters,  if any, and the Special  Counsel in connection with the
registration  or   qualification   (or  exemption  from  such   registration  or
qualification)  of such  Registrable  Securities  for offer  and sale  under the
securities  or Blue Sky laws of such  jurisdictions  within the United States as
any selling holder or Managing Underwriter reasonably requests in writing to the
Company;  keep each such registration or qualification (or exemption  therefrom)
effective during the period such  Registration  Statement is required to be kept
effective  and do any and all other acts or things  necessary  or  advisable  to
enable the  disposition  in such  jurisdictions  of the  Registrable  Securities
covered by the applicable  Registration  Statement;  provided,  that the Company
will not be required to (i) qualify generally to do business in any jurisdiction
where it is not then so qualified or (ii) take any action that would  subject it
to general  service of process in suits or to taxation in any such  jurisdiction
where it is not then so subject.

     (i) Cause the Registrable Securities covered by the applicable Registration
Statement to be registered with or approved by such other governmental  agencies
or authorities  within the United States,  except as may be required solely as a
consequence  of the nature of a selling  holder of  Registrable  Securities,  in
which case the Company will cooperate in all reasonable respects with the filing
of such  Registration  Statement and the

                                       15


granting of such approvals,  as may be necessary to enable the selling holder or
holders  thereof  or the  Managing  Underwriters,  if  any,  to  consummate  the
disposition of such Registrable Securities.

     (j)  During any  Selling  Period  (other  than  during a Deferral  Period),
immediately  upon the existence of any fact or the  occurrence of any event as a
result of which a Registration Statement shall contain any untrue statement of a
material fact or omit to state any material  fact required to be stated  therein
or  necessary to make the  statements  therein not  misleading,  or a Prospectus
shall  contain  any untrue  statement  of a  material  fact or omit to state any
material fact required to be stated  therein or necessary to make the statements
therein,  in the light of the  circumstances  under  which they were  made,  not
misleading,  promptly  notify the  holders,  Special  Counsel  and any  Managing
Underwrite to discontinue use of such Registration  Statement;  promptly prepare
and file an amendment or post-effective amendment to each Registration Statement
or a supplement to the related Prospectus or any document  incorporated  therein
by reference or file any other  required  document  (such as a Current Report on
Form  8-K)  that  would be  incorporated  by  reference  into  the  Registration
Statement  so that the  Registration  Statement  shall not  contain  any  untrue
statement of a material  fact or omit to state any material  fact required to be
stated therein or necessary to make the statements  therein not misleading,  and
so that the Prospectus will not contain any untrue  statement of a material fact
or omit to state any material fact required to be stated therein or necessary to
make the statements  therein, in the light of the circumstances under which they
were made,  not  misleading,  as thereafter  delivered to the  purchasers of the
Registrable   Securities  being  sold   thereunder,   and,  in  the  case  of  a
post-effective  amendment  to a  Registration  Statement,  use all  commercially
reasonable  best  efforts  to cause it to become  effective  as  promptly  as is
practicable.

     (k) Enter into such agreements (including,  in the event of an Underwritten
Offering, an underwriting agreement in form, scope and substance as is customary
in  Underwritten  Offerings)  and take  all such  other  actions  in  connection
therewith (including, in the event of an underwritten offering, those reasonably
requested by the Managing Underwriters,  if any, or the holders of a majority of
the  Registrable  Securities  being sold) in order to expedite or facilitate the
disposition of such Registrable  Securities and in such  connection,  whether or
not an  underwriting  agreement is entered into, and if the  registration  is an
underwritten registration, (i) make such representations and warranties, subject
to the Company's ability to do so, to the holders of such Registrable Securities
and the  underwriters  with  respect  to the  business  of the  Company  and its
subsidiaries, the Registration Statement,  Prospectus and documents incorporated
by reference or deemed incorporated by reference, if any, in each case, in form,
substance  and scope as are  customarily  made by  issuers  to  underwriters  in
underwritten  offerings and confirm the same if and when requested;  (ii) obtain
opinions  of counsel to the  Company  and  updates  thereof  (which  counsel and
opinions (in form, scope and substance) shall be reasonably  satisfactory to the
Managing Underwriters,  if any, Special Counsel and the holders of a majority of
the Registrable  Securities  being sold)  addressed to each of the  underwriters
covering the matters  customarily  covered in opinions requested in underwritten
offerings and such other matters as may be reasonably

                                       16


requested  by such  Special  Counsel and  Managing  Underwriters;  (iii)  obtain
"comfort"  letters and updates  thereof from the  independent  certified  public
accountants  of the Company  (and,  if  necessary,  any other  certified  public
accountants of any  subsidiary of the Company or any business  acquired or to be
acquired by the Company for which financial statements and financial data is, or
is required to be, included in the Registration Statement), addressed to each of
the Managing  Underwriters,  if any,  such  letters to be in customary  form and
covering  matters  of the type  customarily  covered  in  "comfort"  letters  in
connection  with  Underwritten  Offerings;  and (iv) deliver such  documents and
certificates as may be reasonably  requested by the holders of a majority of the
Registrable  Securities  being  sold,  the  Special  Counsel  and  the  Managing
Underwriters,  if any, to evidence the continued validity of the representations
and warranties of the Company and its  subsidiaries  made pursuant to clause (i)
above and to evidence compliance with any customary  conditions contained in the
underwriting agreement or other agreement entered into by the Company.

     (l) If requested in connection with a disposition of Registrable Securities
pursuant  to a  Registration  Statement,  make  available  for  inspection  by a
representative of the holders of Registrable Securities being sold, any Managing
Underwriter  participating in any disposition of Registrable Securities, if any,
and any attorney or accountant  retained by such selling holders or underwriter,
financial and other records, pertinent corporate documents and properties of the
Company and its subsidiaries,  and cause the executive  officers,  directors and
employees  of the  Company  and  its  subsidiaries  to  supply  all  information
reasonably requested by any such representative,  Managing Underwriter, attorney
or accountant in connection with such disposition; subject to reasonable written
assurances  by each  such  person  that  such  information  will only be used in
connection with matters relating to such Registration Statement.

     (m) Comply with all  applicable  rules and  regulations of the SEC and make
generally  available to its security holders earning  statements (which need not
be audited) satisfying the provisions of Section 11(a) of the Securities Act and
Rule 158 thereunder (or any similar rule  promulgated  under the Securities Act)
no later than forty-five (45) days after the end of any twelve (12)-month period
(or  ninety  (90) days  after the end of any  twelve  (12)-month  period if such
period is a fiscal  year) (i)  commencing  at the end of any  fiscal  quarter in
which  Registrable  Securities are sold to  underwriters in a firm commitment or
best efforts underwritten offering, and (ii) if not sold to underwriters in such
an  offering,  commencing  on the first day of the first  fiscal  quarter of the
Company commencing after the effective date of a Registration  Statement,  which
statements shall cover said twelve (12)-month periods.

     (n)  Cooperate  with the  selling  holders  of  Registrable  Securities  to
facilitate  the timely  preparation  and delivery of  certificates  representing
Registrable  Securities to be sold and not bearing any restrictive  legends; and
enable such Registrable Securities to be in such denominations and registered in
such names as the selling holders may request.

     (o) Use all commercially  reasonable best efforts to provide a CUSIP number
for  the  Registrable  Securities  not  later  than  the  effective  date of the
registration.

                                       17

     (p) Cause all Registrable  Securities covered by the Registration Statement
to be  listed  on each  securities  exchange  or  quotation  system on which the
Company's  Common  Stock is then listed no later than the date the  Registration
Statement is declared  effective  and, in  connection  therewith,  to the extent
applicable,  to make such filings under the Exchange Act (e.g.,  the filing of a
Registration  Statement on Form 8-A) and to have such filings declared effective
thereunder.

     (q)  Cooperate  and  assist  in any  filings  required  to be made with the
National Association of Securities Dealers, Inc.

     (r) Provide and cause to be  maintained a transfer  agent and registrar for
all Registrable Securities covered by such registration statement from and after
a date not later than the effective date of such Registration Statement.


                                    ARTICLE V

                              HOLDER'S OBLIGATIONS

     SECTION 5.1. Holder's Obligations.

     (a) Each holder of Registrable  Securities  agrees, by becoming an owner or
transferee  of  any  Registrable  Securities,  that  no  holder  of  Registrable
Securities shall be entitled to sell any of such Registrable Securities pursuant
to a Registration Statement or to receive a Prospectus relating thereto,  unless
such  holder has  furnished  the Company  with any  applicable  notice  required
pursuant to Article II hereof  (including the information  required to accompany
such notice) and, promptly after the Company's  request,  such other information
regarding such holder and the distribution of such Registrable Securities as the
Company may from time to time reasonably  request.  The Company may exclude from
such registration the Registrable  Securities of any holder who does not furnish
such  information  provided  above  for so long as  such  information  is not so
furnished.  Each holder of Registrable  Securities as to which any  Registration
Statement  is being  effected  agrees  promptly  to furnish to the  Company  all
information required to be disclosed in order to make the information previously
furnished  to the  Company  by  such  holder  not  misleading.  Any  sale of any
Registrable  Securities  by any holder  shall  constitute a  representation  and
warranty  by such holder  that the  information  relating to such holder and its
plan of distribution is as set forth in the Prospectus  delivered by such holder
in connection  with such  disposition,  that such  Prospectus does not as of the
time of such sale contain any untrue  statement of a material  fact  relating to
such holder or its plan of distribution  and that such Prospectus does not as of
the time of such sale omit to state any material fact relating to such holder or
its plan of distribution necessary to make the statements in such Prospectus, in
light of the circumstances under which they were made, not misleading.

                                       18


     (b) The  Company  agrees (x) that if any holder of  Registrable  Securities
shall  send a written  notice to the  Company  of an  intended  distribution  of
Registrable  Securities under the Shelf Registration  pursuant to Section 2.1(d)
or the Demand Registration  pursuant to Section 2.2, the Company shall not sell,
make any short sale of, loan,  grant any option for the purchase of,  effect any
public sale or distribution of or otherwise  dispose of its equity securities or
securities  convertible  into or  exchangeable  or  exercisable  for any of such
securities  during the period from first day of the  applicable  Selling  Period
until the date that is ninety  (90) days after the date when such  holder  shall
have  made  such   distribution  of  Registrable   Securities  under  the  Shelf
Registration  or  Demand  Registration,  as the case may be,  as the  holder  or
Managing Underwriter (in the case of an Underwritten  Offering) shall advise the
Company  (provided,  that if the holder or  Managing  Underwriter  shall fail to
advise the Company of any such date prior to the end of the  applicable  Selling
Period, such period shall end on the last day of the applicable Selling Period),
except (i) as part of such registration,  (ii) pursuant to registrations on Form
S-4 or S-8 or any  successor  or similar  forms  thereto  or (iii) as  otherwise
permitted by the Managing  Underwriter of such offering (if any), and (y) to use
all  commercially  reasonable  best  efforts to cause each  holder of its equity
securities or any securities convertible into or exchangeable or exercisable for
any of such  securities,  in each case  purchased  from the  Company at any time
after the date of this Agreement  (other than in a public offering) to agree not
to sell,  make any short sale of,  loan,  grant any option for the  purchase of,
effect  any  public  sale  or  distribution  of or  otherwise  dispose  of  such
securities during such period except as part of such underwritten  registration;
provided,  that no holder of Registrable Securities included in any underwritten
registration shall be required to make any  representations or warranties to the
Company or the underwriters other than  representations and warranties regarding
such holder and such holder's intended method of distribution.

     (c)  During any  Selling  Period  (other  than  during a Deferral  Period),
immediately  upon the existence of any fact or the  occurrence of any event as a
result of which a Registration Statement shall contain any untrue statement of a
material fact or omit to state any material  fact required to be stated  therein
or  necessary to make the  statements  therein not  misleading,  or a Prospectus
shall  contain  any untrue  statement  of a  material  fact or omit to state any
material fact required to be stated  therein or necessary to make the statements
therein,  in the light of the  circumstances  under  which they were  made,  not
misleading,  upon being notified by the Company promptly discontinue use of such
Registration  Statement  until the Company in  accordance  with its  obligations
under this Agreement prepares and files an amendment or post-effective amendment
to each Registration  Statement or a supplement to the related Prospectus or any
document  incorporated  therein by reference or file any other required document
(such as a Current Report on Form 8-K) that would be  incorporated  by reference
into the  Registration  Statement so that the  Registration  Statement shall not
contain any untrue  statement  of a material  fact or omit to state any material
fact required to be stated therein or necessary to make the  statements  therein
not misleading, and so that the Prospectus will not contain any untrue statement
of a  material  fact or omit to state  any  material  fact or omit to state  any
material fact required to be stated  therein or necessary to make the statements
therein,

                                       19

in the light of the circumstances under which they were made, not misleading, as
thereafter delivered to the purchasers of the Registrable  Securities being sold
thereunder.

     (d) Deliver to prospective investors and investors copies of the Prospectus
or  Prospectuses  relating  to  such  Registrable   Securities  (including  each
preliminary  prospectus)  and any amendment or supplement  thereto in accordance
with the Securities Act and applicable state securities laws.


                                   ARTICLE VI

                                    EXPENSES

     SECTION 6.1 Registration  Expenses.  All fees and expenses  incident to the
Company's performance of or compliance with this Agreement shall be borne by the
Company whether or not any of the Registration Statements become effective. Such
fees and expenses shall include,  without  limitation,  (i) all registration and
filing fees (including,  without limitation,  fees and expenses (x) with respect
to filings  required  to be made with the  National  Association  of  Securities
Dealers, Inc. and (y) with respect to compliance with federal securities or Blue
Sky laws  (including,  without  limitation,  fees and  disbursements  of Special
Counsel in connection with Blue Sky qualifications of the Registrable Securities
laws of such jurisdictions as the Managing Underwriters, if any, or holders of a
majority of the Registrable Securities being sold may designate)), (ii) printing
expenses (including,  without limitation,  expenses of printing certificates for
Registrable  Securities in a form eligible for deposit with The Depositary Trust
Company  and  of  printing  Prospectuses  if the  printing  of  Prospectuses  is
requested by the Special Counsel or the holders of a majority of the Registrable
Securities included in any Registration Statement),  (iii) messenger,  telephone
and delivery expenses, (iv) reasonable fees and disbursements of counsel for the
Company and the Special  Counsel in connection with the  Registration,  (v) fees
and disbursements of all independent certified public accountants (including the
expenses of any special audit and "comfort"  letters  required by or incident to
such  performance) and (vi) Securities Act liability  insurance  obtained by the
Company in its sole discretion.  In addition, the Company shall pay its internal
expenses  (including,  without  limitation,  all  salaries  and  expenses of its
officers and employees  performing legal or accounting  duties),  the expense of
any  annual  audit or  interim  review  of  financial  statements,  the fees and
expenses  incurred  in  connection  with the  listing  of the  securities  to be
registered on any securities  exchange on which similar securities issued by the
Company  are then  listed and the fees and  expenses  of any  person,  including
special experts, retained by the Company. Notwithstanding the provisions of this
Section 6.1, each seller of Registrable  Securities  shall pay all  registration
expenses to the extent the Company is  prohibited  by  applicable  Blue Sky laws
from paying for or on behalf of such seller of Registrable Securities.


                                   ARTICLE VII

                                       20

                                 INDEMNIFICATION

     SECTION 7.1 Company  Indemnification.  The Company  agrees to indemnify and
hold harmless each holder of Registrable Securities whose Registrable Securities
are covered by any Registration  Statement,  its directors and officers and each
other  Person,  if any,  who  controls  such  holder  within the  meaning of the
Securities Act,  against any losses,  claims,  damages or liabilities,  joint or
several,  to which any such  indemnified  party  may  become  subject  under the
Securities  Act or  otherwise,  insofar  as  such  losses,  claims,  damages  or
liabilities  (or actions or  proceedings,  whether  commenced or threatened,  in
respect  thereof) arise out of or are based upon any untrue statement or alleged
untrue  statement of any material fact contained in any  Registration  Statement
under which such  securities  were  registered  under the  Securities  Act,  any
preliminary  Prospectus,   final  Prospectus  or  summary  Prospectus  contained
therein,  or any  amendment or  supplement  thereto,  or any omission or alleged
omission  to state  therein a material  fact  required  to be stated  therein or
necessary to make the statements  therein not  misleading,  and the Company will
reimburse  each such  indemnified  party  for any  legal or any  other  expenses
reasonably  incurred by them in connection with  investigating  or defending any
such loss,  claim,  liability,  action or proceeding;  provided that the Company
shall not be liable in any such case to the extent  that any such  loss,  claim,
damage, liability (or action or proceeding in respect thereof) or expense arises
out of or is based upon an untrue  statement  or  alleged  untrue  statement  or
omission  or alleged  omission  made in such  Registration  Statement,  any such
preliminary  Prospectus,  final  Prospectus,  summary  Prospectus,  amendment or
supplement in reliance upon and in conformity with written information furnished
to the  Company  by or on  behalf  of such  holder  specifically  for use in the
preparation thereof. In addition, the Company shall indemnify any underwriter of
such offering and each other Person,  if any, who controls any such  underwriter
within the meaning of the Securities Act in substantially the same manner and to
substantially  the  same  extent  as  the  indemnity  herein  provided  to  each
Indemnified  Party.  Such  indemnity  shall  remain  in full  force  and  effect
regardless of any investigation  made by or on behalf of such holder or any such
director,  officer,  underwriter  or  controlling  person and shall  survive the
transfer of such securities by such holder.

     SECTION 7.2 Seller Indemnification.  Each prospective seller of Registrable
Securities  hereunder  severally,  and not  jointly,  shall  indemnify  and hold
harmless (in the same manner and to the same extent as set forth in Section 7.1)
the Company,  each director of the Company, each officer of the Company and each
other  person,  if any,  who  controls  the  Company  within the  meaning of the
Securities  Act,  with  respect  to any  statement  or alleged  statement  in or
omission or alleged omission from such Registration  Statement,  any preliminary
Prospectus,  final Prospectus or summary Prospectus  contained  therein,  or any
amendment or  supplement  thereof,  if such  statement  or alleged  statement or
omission or alleged  omission was made in reliance upon and in  conformity  with
written  information  furnished  to the  Company by or on behalf of such  seller
specifically  for  use  in  the  preparation  of  such  Registration  Statement,
preliminary  Prospectus,  final Prospectus,  summary  Prospectus or amendment or
supplement. Any such indemnity shall remain in full force and effect, regardless
of any  investigation  made by or on behalf of the Company or any such director,
officer or controlling  person and

                                       21


shall survive the transfer of such securities by such seller. The amount payable
by  any  prospective  seller  of  Registrable  Securities  with  respect  to the
indemnification set forth in this Section 7.2 in connection with any offering of
Registrable  Securities  will not exceed the amount of the gain realized by such
prospective seller pursuant to such offering.

     SECTION  7.3  Indemnification  Procedure.  Promptly  after  receipt  by  an
indemnified  party of notice of the  commencement  of any  action or  proceeding
involving a claim  referred to in the  preceding  sections of this  Article VII,
such indemnified party will, if a claim in respect thereof is to be made against
an indemnifying  party, give written notice to the latter of the commencement of
such action;  provided that the failure of any indemnified  party to give notice
as provided herein shall not relieve the  indemnifying  party of its obligations
under the preceding  sections of this Article VII, except to the extent that the
indemnifying  party is actually  prejudiced  by such failure to give notice.  In
case any such action is brought  against an  indemnified  party,  unless in such
indemnified  party's  reasonable  judgment a conflict of interest  between  such
indemnified  and  indemnifying  parties may exist in respect of such claim,  the
indemnifying party shall be entitled to participate in and to assume the defense
thereof,  jointly with any other indemnifying party similarly  notified,  to the
extent  that  the   indemnifying   party  may  wish,  with  counsel   reasonably
satisfactory to such  indemnified  party, and after notice from the indemnifying
party to such  indemnified  party  of its  election  so to  assume  the  defense
thereof,  the indemnifying  party shall not be liable to such indemnified  party
for  any  legal  or  other  expenses  subsequently  incurred  by the  latter  in
connection with the defense thereof.  No indemnifying  party shall,  without the
consent of the indemnified party, consent to entry of any judgment or enter into
any  settlement  of any such action  which does not include as an  unconditional
term thereof the giving by the claimant or plaintiff to such  indemnified  party
of a release  from all  liability  in respect to such  claim or  litigation.  No
indemnified  party  shall  consent  to entry of any  judgment  or enter into any
settlement  of any such  action  the  defense  of which has been  assumed  by an
indemnifying party without the consent of such indemnifying party.

     SECTION 7.4 Remedies.

     (a) If the indemnification  provided for in Section 7.1 or 7.2, as the case
may be, is unavailable to an indemnified party in respect of any expense,  loss,
claim, damage or liability referred to therein, then each indemnifying party, in
lieu of indemnifying such indemnified party, shall contribute to the amount paid
or payable by such indemnified  party as a result of such expense,  loss, claim,
damage or liability  (i) in such  proportion  as is  appropriate  to reflect the
relative  benefits  received  by the  Company  on the one hand and the holder or
underwriter,  as the case may be,  on the  other  from the  distribution  of the
Registrable Securities or (ii) if the allocation provided by clause (i) above is
not permitted by applicable law, in such proportion as is appropriate to reflect
not only the  relative  benefits  referred  to in clause  (i) above but also the
relative fault of the Company on the one hand and of the holder or  underwriter,
as the case may be, on the other in connection  with the statements or omissions
which resulted in such expense, loss, damage or liability,  as well as any other
relevant equitable considerations.  The relative fault of the Company on the one
hand and of the holder or underwriter, as the case may be, on the

                                       22


other shall be  determined  by  reference  to, among other  things,  whether the
untrue or alleged  untrue  statement  of a material  fact or omission to state a
material fact relates to information  supplied by the Company,  by the holder or
by  the  underwriter  and  parties'  relative  intent,   knowledge,   access  to
information  and  opportunity  to correct or prevent such statement or omission;
provided,  that the  foregoing  contribution  agreement  shall  not inure to the
benefit of any indemnified party if indemnification would be unavailable to such
indemnified  party by reason of the proviso  contained in the first  sentence of
subdivision (a) of this Section 7.4, and in no event shall the obligation of any
indemnifying  party to contribute  under this  subdivision (d) exceed the amount
that  such  indemnifying  party  would  have  been  obligated  to  pay by way of
indemnification  if the  indemnification  provided for under subdivisions (a) or
(b) of this Section 2.5 had been available under the circumstances.

     (b) The  Company and the holders of  Registrable  Securities  agree that it
would not be just and  equitable  if  contribution  pursuant to this Section 7.4
were determined by pro rata allocation (even if the holders and any underwriters
were  treated  as one  entity  for  such  purpose)  or by any  other  method  of
allocation that does not take account of the equitable  considerations  referred
to in the immediately  preceding paragraph (a). The amount paid or payable by an
indemnified  party as a result of the losses,  claims,  damages and  liabilities
referred to in the immediately  preceding  paragraph shall be deemed to include,
subject  to the  limitations  set  forth  above,  any  legal or  other  expenses
reasonably  incurred by such indemnified party in connection with  investigating
or defending any such action or claim.

     (c)  Notwithstanding the other provisions of this Section 7.4, no holder of
Registrable Securities or underwriter shall be required to contribute any amount
in excess of the  amount by which (i) in the case of any such  holder,  the gain
realized by such holder from the sale of  Registrable  Securities or (ii) in the
case of an  underwriter,  the total  price at which the  Registrable  Securities
purchased  by it and  distributed  to the  public  were  offered  to the  public
exceeds,  in any such  case,  the  amount of any  damages  that  such  holder or
underwriter  has  otherwise  been  required  to pay by reason of such  untrue or
alleged   untrue   statement  or  omission.   No  Person  guilty  of  fraudulent
misrepresentation  (within the meaning of Section 11(f) of the  Securities  Act)
shall be  entitled  to  contribution  from any Person who was not guilty of such
fraudulent misrepresentation.



                                  ARTICLE VIII

                                     REPORTS

     SECTION 8.1 Rule 144; Rule 144A; Form S-3.

     (a) The Company will file all reports  required to be filed by it under the
Securities Act and the Exchange Act and the rules and regulations adopted by the
SEC  thereunder  and will take such further  action as any holder of Registrable
Securities may

                                       23


reasonably request,  all to the extent required from time to time to enable such
holder to sell Registrable  Securities without registration under the Securities
Act within the limitation of the  exemptions  provided by (a) Rule 144 under the
Securities  Act,  as such  Rule may be  amended  from  time to time,  or (b) any
similar rule or regulation hereafter adopted by the SEC. Upon the request of any
holder of  Registrable  Securities,  the Company  will  deliver to such holder a
written  statement as to whether it has  complied  with such  requirements.  The
Company further  covenants that it will cooperate with any holder of Registrable
Securities and take such further  reasonable action as any holder of Registrable
Securities may reasonably request (including,  without  limitation,  making such
reasonable  representations as any such holder may reasonably  request),  all to
the extent required from time to time to enable such holder to sell  Registrable
Securities  without  registration under the Securities Act within the limitation
of the exemptions  provided by Rule 144 and Rule 144A, as applicable,  under the
Securities Act.

     (b) For so long as any  shares of  Registrable  Securities  are  Restricted
Securities  within the meaning of Rule 144(a)(3)  under the Securities  Act, the
Company covenants and agrees that it shall, during any period in which it is not
subject to Section 13 or 15(d) of the Exchange Act, make available to any holder
of  Registrable  Securities  in  connection  with  the  sale by such  holder  of
Registrable  Securities and any prospective purchaser of Registrable  Securities
from such, in each case upon request, the information  specified in, and meeting
the requirements of, Rule 144A(d)(4) under the Securities Act.

     (c) The Company shall file the reports required to be filed by it under the
Exchange Act and shall comply with all other eligibility requirements for use of
Form S-3 set forth in the  instructions  to Form S-3  (other  than  Registration
Requirement A.5).


                                   ARTICLE IX

                                  MISCELLANEOUS

     SECTION  9.1  Notices.  All  notices,  consents,  requests,   instructions,
approvals and other communications  provided for herein and all legal process in
regard  hereto  shall be  validly  given,  made or  served,  if in  writing  and
delivered  personally,  by  telecopy  (except  for  legal  process)  or  sent by
registered mail, postage prepaid, if to:

                  The Company:

                           Perini Corporation
                           73 Mt. Wayte Avenue
                           Framingham, Massachusetts  01701
                           Attn:            Robert Band, President
                           Facsimile:       (508) 628-2960

                                    with a copy to:

                                       24


                           Goodwin, Procter & Hoar LLP
                           Exchange Place
                           Boston, MA  01209
                           Attn:            Richard A. Soden, Esq.
                           Facsimile:       (617) 523-1231

                  TSC and RNT:

                           Tutor-Saliba Corp.
                           15901 Olden Street
                           Sylmar, CA  91342-1093
                           Attn:            Ronald N. Tutor
                           Facsimile:       (818) 367-9574

                                    with a copy to:

                           Wilmer, Cutler & Pickering
                           2445 M Street, N.W.
                           Washington, D.C.  20037
                           Attn:            Eric R. Markus
                           Facsimile:       (202) 663-6363

                  National Union:

                           c/o  AIG Global Investment Corp.
                           175 Water Street
                           26th Floor
                           New York, New York 10038
                           Attn:            Christopher H. Lee
                                            Chris Saxman
                           Facsimile:       (212) 458-2250




                                    with a copy to:

                           American International Group, Inc.
                           Law Department
                           70 Pine Street
                           28th Floor
                           New York, New York 10270
                           Attn:            John P. Hornbostel
                           Facsimile:       (212) 363-8596

                  O&G:

                                       25


                           O&G Industries, Inc.
                           112 Wall Street
                           Torrington, Connecticut 06790
                           Attn:            Raymond Oneglia
                                            Kenneth Merz
                           Facsimile:       (860) 626-6498

                                    with a copy to:

                           Murtha, Cullina, Richter & Pinney
                           185 Asylum Street
                           City Place I
                           Hartford, Connecticut 06103-3469
                           Attn:            Timothy Largay
                           Facsimile:       (860) 240-6150

                  BLUM:

                           BLUM Capital Partners, L.P.
                           909 Montgomery Street, Suite 400
                           San Francisco, California 94133
                           Attn:            Murray Indick
                           Facsimile:       (415) 434-3130

                  PB Capital:

                           c/o  BLUM Capital Partners, L.P.
                           909 Montgomery Street, Suite 400
                           San Francisco, California 94133
                           Attn:            Murray Indick
                           Facsimile:       (415) 434-3130


                  The Common Fund:

                           c/o BLUM Capital Partners, L.P.
                           909 Montgomery Street, Suite 400
                           San Francisco, California 94133
                           Attn:            Murray Indick
                           Facsimile:       (415) 434-3130

                  ULLICO:

                           The Union Labor Life Insurance Company
                           111 Massachusetts Avenue, N.W.

                                       26


                           Washington, D.C. 2001
                           Attn:            Robert Kennedy
                           Facsimile:       (202) 682-4690

                                    with a copy to:

                           Paul, Hastings, Janofsky & Walker LLP
                           555 South Flower Street, 23rd Floor
                           Los Angeles, California 90071
                           Attn:            Alan J. Barton
                           Facsimile:       (213) 627-0705

or to such other  address  or  facsimile  number as any party may,  from time to
time, designate in a written notice given in a like manner.

     SECTION 9.2 Binding Nature of Agreement.  This  Agreement  shall be binding
upon and inure to the benefit of and be  enforceable  by the  parties  hereto or
their successors in interest, except as expressly otherwise provided herein.

     SECTION 9.3 Descriptive  Headings.  The descriptive headings of the several
sections and  paragraphs of this  Agreement are inserted for reference  only and
shall not limit or otherwise affect the meaning hereof.

     SECTION 9.4 Specific Performance. Without limiting the rights of each party
hereto to pursue all other legal and  equitable  rights  available to such party
for  the  other  parties'  failure  to  perform  their  obligations  under  this
Agreement,  the parties hereto  acknowledge and agree that the remedy at law for
any failure to perform their obligations  hereunder would be inadequate and that
each  of  them,  respectively,   shall  be  entitled  to  specific  performance,
injunctive relief or other equitable remedies in the event of any such failure.

     SECTION 9.5 Governing Law;  Consent to  Jurisdiction . This Agreement shall
be governed by and construed  and enforced in accordance  with the internal laws
of the State of New York. Each of the parties hereto irrevocably  submits to the
personal  exclusive  jurisdiction  of the United States  District  Court for the
Southern  District  of New York for the  purposes  of any suit,  action or other
proceeding arising out of this Agreement or any transaction  contemplated hereby
(and, to the extent permitted under applicable rules of procedure, agrees not to
commence any action,  suit or proceeding  relating hereto except in such court).
Each of the parties further agree that service of any process,  summons,  notice
or document hand delivered or sent by registered mail to such party's respective
address  set forth in Section 9.1 will be  effective  service of process for any
action,  suit or  proceeding in New York with respect to any matters to which it
has  submitted  to  jurisdiction  as  set  forth  in the  immediately  preceding
sentence.  Each of the parties hereto irrevocably and unconditionally  waive any
objection to the laying of venue of any action,  suit or proceeding  arising out
of this Agreement or the transactions  contemplated  hereby in the United States
District  Court for the  Southern  District  of New  York,  and  hereby  further
irrevocably  and

                                       27


unconditionally  waive and agree  not to plead or claim in such  court  that any
such  action,  suit or  proceeding  brought in such court has been brought in an
inconvenient forum.

     SECTION 9.6 WAIVER OF JURY TRIAL. EACH OF PARTIES HERETO HEREBY IRREVOCABLY
WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF
OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY.

     SECTION 9.7 Limitations on Damages.  Each party hereto  acknowledges  that,
except as  provided in this  Agreement,  no party is entitled to seek or recover
consequential,  punitive or exemplary damages in respect of this Agreement under
any  circumstances  or  for  any  reason.  Consequential  damages  are,  without
limitation,  lost  profits,  lost  revenue  and the like but do not  include the
actual costs incurred in obtaining substitute performance where there has been a
failure to perform an obligation under any provision of this Agreement.

     SECTION 9.8 Severability.  If any term, provision,  covenant or restriction
of this  Agreement is held by a court of competent  jurisdiction  to be invalid,
void or  unenforceable,  the remainder of the terms,  provisions,  covenants and
restrictions  of this Agreement  shall remain in full force and effect and shall
in no way be affected,  impaired or  invalidated.  It is hereby  stipulated  and
declared to be the  intention of the parties  that they would have  executed the
remaining terms, provisions, covenants and restrictions without including any of
such which may be hereafter declared invalid, void or unenforceable.

     SECTION 9.9 Amendments to Laws. Any reference to a section,  form,  rule or
regulation  of the  Securities  Act or  Exchange  Act,  includes  any  successor
section, form, rule, regulation or law.

     SECTION 9.10 Counterparts. This Agreement may be executed simultaneously in
any number of counterparts,  each of which shall be deemed an original,  but all
such counterparts shall together constitute one and the same instrument.

     SECTION 9.11 Entire Agreement. Each party expressly acknowledges and agrees
that this  Agreement  is the final  expression  of the  parties  agreement,  and
supercede all prior and contemporaneous agreements and understandings, both oral
and written,  among the  parties,  with  respect to the subject  matter  hereof.
Except as set forth in this Agreement, the Securities Purchase Agreement and the
Shareholders'  Agreement,  the  parties  hereto  acknowledge  that  they are not
parties to, and have no knowledge  of, any  agreements or  understandings,  both
oral  and  written,  to  act  in  concert  or  as a  group  (including,  without
limitation,  as a group within the meaning of Section13(d) of the Exchange Act),
or otherwise act together, with respect to the Company or its securities.

     SECTION 9.12  Amendment and Waiver.  No provision of this  Agreement may be
waived except by an  instrument in writing  signed by the party against whom the
waiver is to be  effective.  No  provision of this  Agreement  may be amended or
modified  except by an instrument in writing  signed by holders of a majority of
Registrable  Securities or as otherwise  provided in this  Agreement,  provided,
that no such  amendment

                                       28


may adversely affect the rights of any holder of Registrable  Securities  unless
signed by such holder.

     SECTION 9.13 No Third Party Beneficiaries.  Nothing in this Agreement shall
convey any rights upon any person or entity which is not a party or a transferee
of or successor to a party to this Agreement.

     SECTION  9.14   Effectiveness.   This  Agreement  shall  become   effective
immediately  at such time when Closing under the Securities  Purchase  Agreement
shall occur.

     SECTION 9.15 No Prior Agreements; No Inconsistent Agreements.

     (a) The Company,  BLUM, The Common Fund, PB Capital and ULLICO hereby agree
that this  Registration  Rights  Agreement  supercedes  and  replaces  all prior
agreements between or among those Persons relating to registration rights.

     (b)  The  Company  has not  entered  into  and  will  not  enter  into  any
registration  rights  agreement or similar  arrangements  the performance by the
Company of the terms of which would in any manner conflict with,  restrict or be
inconsistent  with the performance by the Company of its obligations  under this
Agreement.


                  [remainder of page intentionally left blank]

                                       29

     IN WITNESS WHEREOF, each party hereto have caused this Agreement to be duly
executed by its authorized officer as of the day and year first above written.

              PERINI CORPORATION


                       By: /s/Robert Band
                       Name:  Robert Band
                       Title:  President


              TUTOR-SALIBA CORPORATION


                       By:  /s/Ronald N. Tutor
                       Name: Ronald N. Tutor
                       Title:  President and Chief Executive Officer


              RONALD N. TUTOR


                       /s/Ronald N. Tutor
                       Ronald N. Tutor


              NATIONAL UNION FIRE INSURANCE
              COMPANY OF PITTSBURGH, PA


                       By:  /s/David B. Pinkerton
                       Name:  David B. Pinkerton
                       Title:  Vice President


              O&G INDUSTRIES, INC.


                       By:  /s/Raymond R. Oneglia
                       Name:  Raymond R. Ongelia
                       Title:  Vice Chairman

                                       30


              BLUM CAPITAL PARTNERS, L.P.
              (Signatory for the purposes set forth in the
              Introductory Paragraph of this Agreement only)

              By:      Richard C. Blum & Associates, Inc.,
                       its general partner

                       By:      /s/Murray A. Indick
                       Name:    Murray A. Indick
                       Title:   Partner, General Counsel and Secretary


              PB CAPITAL PARTNERS, L.P.
              (Signatory for the purposes set forth in the
              Introductory Paragraph of this Agreement only)

              By:      BLUM Capital Partners, L.P., its general partner

                       By:      Richard C. Blum & Associates, Inc.,
                                its general partner

                                By:      /s/Murray A. Indick
                                Name:    Murray A. Indick
                                Title:   Partner, General Counsel and
                                         Secretary


              THE COMMON FUND FOR NON-PROFIT
              ORGANIZATIONS
              (Signatory for the purposes set forth in the
              Introductory Paragraph of this Agreement only)

              By:      BLUM Capital Partners, L.P., its investment advisor

                       By:      Richard C. Blum & Associates, Inc.,
                                its general partner

                                By:      /s/Murray A. Indick
                                Name:    Murray A. Indick
                                Title:   Partner, General Counsel and
                                         Secretary

                                       31

              THE UNION LABOR LIFE INSURANCE
              COMPANY, acting for its SEPARATE ACCOUNT P
              (Signatory for the purposes set forth in the
              Introductory Paragraph of this Agreement only)



                                By:  /s/Joseph Linehan
                                Name:  Joseph Linehan
                                Title:  Vice President, Securities

                                       32


                                                                     Exhibit 4.2

                             SHAREHOLDERS' AGREEMENT

                           dated as of March 29, 2000

                                      among

                            TUTOR-SALIBA CORPORATION,

                                RONALD N. TUTOR,

                              O&G INDUSTRIES, INC.,

                          NATIONAL UNION FIRE INSURANCE
                           COMPANY OF PITTSBURGH, PA.,

                           BLUM CAPITAL PARTNERS, L.P.

                           PB CAPITAL PARTNERS, L.P.,

                  THE COMMON FUND FOR NON-PROFIT ORGANIZATIONS,

                     THE UNION LABOR LIFE INSURANCE COMPANY,
                   ACTING ON BEHALF OF ITS SEPARATE ACCOUNT P,

                                       and

                               PERINI CORPORATION






                                                           TABLE OF CONTENTS

                                                                                                                Page
                                                                                                             

ARTICLE I Definitions.............................................................................................1
                    SECTION 1.01         Definitions..............................................................1
                    SECTION 1.02         Other Terms..............................................................6

ARTICLE II Shares Subject to this Agreement; Transfers............................................................7
                    SECTION 2.01         Shares Subject to this Agreement.........................................7
                    SECTION 2.02         Restrictions on Transfer.................................................7
                    SECTION 2.03         Permitted Transferees; Co-Investors; Public Offerings....................8
                    SECTION 2.04         Restrictions on Transfer Relating to Preservation of NOLs................8
                    SECTION 2.05         Attempted Transfers in Violation of this Agreement.......................9
                    SECTION 2.06         Legend...................................................................9

ARTICLE III Put Rights...........................................................................................11
                    SECTION 3.01         Put Option..............................................................11
                    SECTION 3.02         Put Period..............................................................11
                    SECTION 3.03         Put Notice..............................................................11
                    SECTION 3.04         Put Price...............................................................11
                    SECTION 3.05         Put Closing.............................................................11
                    SECTION 3.06         Assignment of Put Option................................................12
                    SECTION 3.07         RNT Obligation Under Put Option.........................................12
                    SECTION 3.08         Put Postponement........................................................12
                    SECTION 3.09         Exercise of Put Option Not a Transfer...................................12

ARTICLE IV Call Rights...........................................................................................13
                    SECTION 4.01         Call Option.............................................................13
                    SECTION 4.02         Call Period.............................................................13
                    SECTION 4.03         Call Notice.............................................................13
                    SECTION 4.04         Call Price..............................................................13
                    SECTION 4.05         Call Closing............................................................13
                    SECTION 4.06         Assignment of Call Option...............................................14
                    SECTION 4.07         Call Postponement.......................................................14
                    SECTION 4.08         Exercise of Call Option Not a Transfer..................................14

ARTICLE V Rights of First Refusal................................................................................14
                    SECTION 5.01         Right of First Refusal on Transfers.....................................14
                    SECTION 5.02         Notice of Intent to Purchase............................................15
                    SECTION 5.03         Offered Shares Closing..................................................15
                    SECTION 5.04         Sale to Third Party.....................................................16
                    SECTION 5.05         Limitation as to National Union.........................................16

ARTICLE VI Tag-Along Rights......................................................................................16
                    SECTION 6.01         Tag-Along Option........................................................16
                    SECTION 6.02         Sale to Third Party.....................................................17
                    SECTION 6.03         Limitation as to National Union.........................................17

                                       i

ARTICLE VII The Company's Board Of Directors; Publicity..........................................................17
                    SECTION 7.01         Nominees................................................................17
                    SECTION 7.02         Voting for Election of Directors........................................19
                    SECTION 7.03         Vacancy; Removal........................................................19
                    SECTION 7.04         Continuation as Director................................................19
                    SECTION 7.05         Publicity...............................................................19
                    SECTION 7.06         Observer Rights for Shareholder Designee................................20
                    SECTION 7.07         Subscription Rights.....................................................20

ARTICLE VIII Miscellaneous.......................................................................................21
                    SECTION 8.01         Injunctive Relief.......................................................21
                    SECTION 8.02         Entire Agreement........................................................21
                    SECTION 8.03         Binding Effect; Benefit.................................................21
                    SECTION 8.04         Assignability...........................................................22
                    SECTION 8.05         Amendment; Waiver; Termination..........................................22
                    SECTION 8.06         Notices.................................................................22
                    SECTION 8.07         Fees and Expenses.......................................................24
                    SECTION 8.08         Headings................................................................25
                    SECTION 8.09         Counterparts............................................................25
                    SECTION 8.10         Governing Law; Consent to Jurisdiction..................................25
                    SECTION 8.11         Limitations on Damages..................................................25
                    SECTION 8.12         Severability............................................................25
                    SECTION 8.13         Amendments to Laws......................................................25
                    SECTION 8.14         No Third Party Beneficiaries............................................25
                    SECTION 8.15         Mutual Drafting.........................................................26
                    SECTION 8.16         Further Representations.................................................26



                                       ii


     SHAREHOLDERS'  AGREEMENT dated as of March 29, 2000 (the  "Agreement"),  by
and among Tutor-Saliba Corporation,  a California corporation ("TSC"), Ronald N.
Tutor  ("RNT"),  National Union Fire  Insurance  Company of  Pittsburgh,  Pa., a
Pennsylvania corporation ("National Union"), O&G Industries, Inc., a Connecticut
corporation  ("O&G"),   BLUM  Capital  Partners,   L.P.,  a  California  limited
partnership ("BLUM"), PB Capital Partners,  L.P., a Delaware limited partnership
("PB  Capital"),  The  Common  Fund  for  Non-Profit  Organizations,  a New York
non-profit  corporation ("The Common Fund"),  and The Union Labor Life Insurance
Company,  a  Maryland  corporation  acting on behalf of its  Separate  Account P
("ULLICO"), and Perini Corporation, a Massachusetts corporation (the "Company").
Except  to the  extent  a  signatory  hereto  is  explicitly  excluded  from the
application of particular  provisions of this Agreement as specified below, TSC,
National  Union,  O&G,  BLUM,  PB  Capital,  The  Common  Fund  and  ULLICO  are
collectively  referred to as the  "Shareholders".  O&G,  BLUM,  PB Capital,  The
Common  Fund and  ULLICO  shall  each be a party to this  Agreement  solely  for
purposes of Sections  2.04,  2.05 and 2.06 and  Articles  VI, VII and VIII.  The
Company shall be a party to this Agreement solely for purposes of Sections 2.03,
2.04, 2.05 and 2.06 and Articles VII and VIII.

                              W I T N E S S E T H :

     WHEREAS,  pursuant to the Securities  Purchase Agreement (as defined below)
TSC,  National  Union and O&G have agreed to acquire  securities of the Company;
and

     WHEREAS, RNT is the sole shareholder of TSC; and

     WHEREAS,  the parties  hereto desire to enter into this Agreement to govern
certain of their relative rights,  duties and obligations after  consummation of
the transactions contemplated by the Securities Purchase Agreement; and

     WHEREAS,  O&G, BLUM, PB Capital,  The Common Fund and ULLICO have agreed to
become parties to this Agreement to govern certain  restricted  transfers as set
forth  in  Sections  2.04,  2.05 and  2.06,  to  provide  tag-along  rights  and
obligations  as set  forth in  Article  VI and to  provide  certain  rights  and
obligations  with  respect to the  election of  directors,  observer  status and
subscription as set forth in Article VII only.

     NOW,  THEREFORE,  the  Shareholders  having  authorized  the  execution and
delivery  of  this  Shareholders'  Agreement  as  required  by the  laws  of the
jurisdiction in which each is incorporated or organized, as the case may be, and
intending to be bound hereby, agree as follows:

                                   ARTICLE I

                                   Definitions

SECTION 1.01  Definitions.  The following  terms used in this Agreement have the
following meanings:

     (a)  "Affiliate"  means,  with  respect  to any  Person,  any other  Person
directly or indirectly controlling,  controlled by, or under common control with
such Person,  pro-

                                       1



vided that no security holder of the Company shall be deemed an Affiliate of any
other security holder solely by reason of any investment in the Company.

     (b)  "Beneficially  Own" shall have the meaning set forth in Rules 13d-3 or
16a-1 of the Exchange Act.

     (c) "BLUM" has the meaning ascribed to it in the introductory  paragraph to
this Agreement.

     (d) "Business Day" means any day except a Saturday,  Sunday or other day on
which  commercial  banks in New York City are required or  authorized  by law to
close.

     (e) "Call Event" means the proposed  Transfer of Put/Call  Shares to a bona
fide purchaser  through a registered  public  offering  pursuant to registration
rights granted under the Registration Rights Agreement.

     (f) "Call Return" means 14% per annum.

     (g)  "Closing"  means the  Closing as defined  in the  Securities  Purchase
Agreement.

     (h) "Code" means the Internal Revenue Code of 1986, as amended from time to
time.

     (i) "The Common  Fund" has the meaning  ascribed to it in the  introductory
paragraph to this Agreement.

     (j) "Common  Stock" means the common stock,  par value $1.00 per share,  of
the Company.

     (k) "Company" has the meaning ascribed to it in the introductory  paragraph
of this Agreement.

     (l)   "Control"   (including   with   correlative   meanings,   the   terms
"controlling",  "controlled by" and "under common control  with"),  as used with
respect to any  Person,  means the  power,  direct or  indirect,  (i) to vote or
direct  the  voting  of  more  than  50% of the  outstanding  shares  of  voting
securities  of such  Person,  or (ii) to direct or cause  the  direction  of the
management and policies of such Person whether by contract or otherwise,  except
that no  change  of  control  will be  deemed  to have  occurred  as a result of
customary  rights granted in any indenture,  credit agreement or other agreement
or instrument  unless and until there has been a default under the terms of that
agreement and the lender exercises the rights granted therein.

     (m) "Covered  Common Stock" means the shares of Common Stock of the Company
purchased by a  Shareholder  pursuant to the  Securities  Purchase  Agreement or
otherwise owned by a Shareholder on the date hereof.

     (n) "Definitive Agreements" mean this Agreement and the Securities Purchase
Agreement, each as amended, modified or supplemented from time to time.

                                       2

     (o) "Distributable  Property-in-Kind"  means  Property-in-Kind  (other than
Property-in-Kind  that has been included in the  calculation  of  Distributions)
distributed  or declared for  distribution  to a  Shareholder  on account of any
Shares or other securities distributed in kind on account of Shares.

     (p)  "Distributions"  mean  (i) all  cash  dividends  declared  and paid on
account of any Share, plus (ii) the cash proceeds received by a Shareholder from
the sale of  Property-in-Kind  (minus all costs  incurred by the  Shareholder in
connection with the sale, including attorneys fees and expenses), plus (iii) the
Fair  Market  Value  of any  Property-in-Kind  received  by the  Shareholder  in
exchange for Shares.

     (q)  "Equity   Security"  means  (i)  any  Common  Stock  or  other  Voting
Securities,  (ii) any securities of the Company convertible into or exchangeable
for Common Stock or other  Voting  Securities  or (iii) any  options,  rights or
warrants  (or any similar  securities)  issued by the Company to acquire  Common
Stock or other Voting  Securities,  in each case whether preferred or common, of
any class or  series,  outstanding  prior to or any time  after the date of this
Agreement.

     (r) "Exchange Act" means the Securities Exchange Act of 1934, as amended.

     (s) "Fair Market Value" means (i) with respect to any security  listed on a
national securities exchange or quoted on the National Association of Securities
Dealers, Inc. National Market System, the average of the daily closing prices on
the American  Stock  Exchange (or the  principal  exchange or automated  trading
system on which such  security  may be listed or may trade) for the twenty  (20)
consecutive  trading days commencing on the fifth (5th) trading day prior to the
date as of which  the Fair  Market  Value is  being  determined,  and (ii)  with
respect  to any  security  other than one  described  in clause (i) or any other
property or assets, the Fair Market Value shall be the fair market value of such
security or property  established by two  independent  investment  banking firms
with national  reputations,  one of who will be selected by the Put Purchaser or
Call Purchaser,  as the case may be, and one of whom will be selected by the Put
Seller or Call Seller,  as the case may be. If the two investment  banking firms
arrive at fair market  values that differ by more than 10%,  the two  investment
banking  firms  shall  select a third  investment  banking  firm with a national
reputation.  The Fair  Market  Value  shall be equal to the  average  of the two
appraisals  closest in value to each other in the case of three  appraisals,  or
the average of the two appraisals if there is not a third appraisal. The closing
price  referred  to in clause (i) for each day shall be the  closing  price,  if
reported,  or, if the closing price is not reported,  the average of the closing
bid and  asked  prices  as  reported  by the  Nasdaq  National  Market  (or such
principal  exchange or market) or a similar source selected from time to time by
the Company for quotation of its Common Stock.  In the event the closing  prices
required by clause (i) are  unavailable,  Fair Market Value shall be  determined
based on the ten (10)  consecutive  trading days  commencing  on the fifth (5th)
trading  day  prior  to the  relevant  date  or,  if  such  closing  prices  are
unavailable, Fair Market Value shall be determined as provided in clause (ii).

     (t)  "Initial  Investment  per  Share"  means the  $4.25 per Share  paid by
National  Union for the  Covered  Common  Stock  under the  Securities  Purchase
Agreement, as

                                       3


adjusted for any subsequent common stock dividends,  stock splits, reverse stock
splits or other similar transactions.

     (u)  "National  Union" has the meaning  ascribed to it in the  introductory
paragraph to this Agreement.

     (v) "New Security" means any Equity  Security  proposed to be issued by the
Company after the Closing;  provided that "New  Security"  shall not include (i)
any securities issuable upon conversion of any convertible Equity Security, (ii)
any  securities  issuable upon exercise of any option,  warrant or other similar
Equity  Security,  (iii) any  securities  issuable in connection  with any stock
split, stock dividend or  recapitalization  of the Company where such securities
are issued to all  stockholders  of the  Company on a pro rata  basis,  (iv) any
securities  issued to officers,  employees or directors of the Company or any of
its Subsidiaries  pursuant to any Board-approved  officer,  employee or director
benefit plan or  arrangement,  (v) any securities  issued in connection with any
transaction  whereby the  Company  acquires  the stock,  assets or business of a
third party not prohibited by this Agreement, or (vi) any security issued in any
public offering registered under the Securities Act .

     (w) "O&G" has the meaning ascribed to it in the  introductory  paragraph of
this Agreement.

     (x)  "PB  Capital"  has  the  meaning  ascribed  to it in the  introductory
paragraph to this Agreement.

     (y)  "Person"  means and includes an  individual,  a  partnership,  a joint
venture, a corporation,  a trust, a limited liability company, an unincorporated
organization,  any  foreign,  federal,  state or  local  court  or  tribunal  or
administrative,  governmental or regulatory body, agency  commission,  division,
department, public body or other authority, or any other organization or entity.

     (z) "Pro Rata Share" means, as to any Shareholder or Permitted  Transferee,
the fraction of an entire  issuance of New  Securities,  the  numerator of which
shall be the sum of (w) the  number  of shares  of  Common  Stock  owned by such
Shareholder or Permitted  Transferee  immediately prior to such issuance of such
New  Securities  plus (x) the  number of shares of Common  Stock into which then
outstanding convertible securities (including,  without limitation,  options and
warrants) owned by such Shareholder or Permitted Transferee are then exercisable
or  convertible,  and  the  denominator  of  which  shall  be the sum of (y) the
aggregate number of shares of Common Stock outstanding immediately prior to such
issuance of such New  Securities  plus (z) the number of shares of Common  Stock
into  which  then  outstanding   convertible  securities   (including,   without
limitation, options and warrants) are then exercisable or convertible.

     (aa) "Property-in-Kind" means securities, personal property or other assets
(other  than  cash or  additional  shares  of  Common  Stock)  distributed  to a
Shareholder  on account  of Shares or other  securities  distributed  in kind on
account of Shares, whether through a dividend, recapitalization, reorganization,
merger or similar transaction.

                                       4

     (bb) "Put  Event"  means (i) a change of  Control  of the  Company;  (ii) a
change of Control of TSC;  (iii) one or more Transfers (other than a Transfer to
a Permitted Transferee) by TSC and its Permitted Transferees of shares of Common
Stock such that RNT fails to have sole direct or indirect  Beneficial  Ownership
of at least 10% of the  outstanding  Common Stock of the Company  (for  purposes
hereof,  the voting securities of the Company  Beneficially  Owned,  directly or
indirectly, by TSC shall be deemed solely Beneficially Owned indirectly by RNT),
(iv) RNT shall not be involved  in the  management  of the  Company or TSC,  (v)
breach of any  provisions of the Definitive  Agreements  arising out of the sole
actions of RNT or TSC;  (vi) an order  shall be entered by a court of  competent
jurisdiction  finding  the  Company to be  bankrupt  or  insolvent,  ordering or
approving  liquidation or reorganization of the Company or appointing a receiver
for all or substantially all of the property of the Company and such order shall
not be vacated or stayed within 60 days,  or an assignment  shall be made by the
Company for the benefit of its creditors;  or (vii) acceleration of payment of a
material principal amount of the senior debt of the Company.  No Transfer of any
security  of the  Company  by  National  Union or any  Permitted  Transferee  or
Co-investor shall constitute or give rise to a Put Event hereunder.

     (cc) "Put Return" means 10% per annum.

     (dd) "Put/Call  Shares" means up to 50% of the Shares purchased by National
Union at  Closing,  which  Shares  (including  Shares  issued on  account of any
subsequent Common Stock dividends,  stock splits,  reverse stock splits or other
similar  transactions  relating  thereto)  shall bear the  legends  set forth in
subsections  2.06(a) and (b) and which  shall be  represented  by a  certificate
separate and distinct  from any Shares held by National  Union or its  Permitted
Transferee,  if  any,  that  are  not  identically  legended,  and  (ii)  Shares
represented by certificates issued to replace the certificate(s)  referred to in
the preceding  clause;  provided,  however,  that the Put/Call  Shares shall not
include Shares  Transferred in accordance  with Article V (except as provided in
Section  5.04) or  Article  VI (except  as  provided  in  Section  6.02) of this
Agreement.  Shares  shall  cease  to  be  Put/Call  Shares  upon  the  lapse  or
termination of the Put Option or Call Option.

     (ee) "Registration Rights Agreement" means that certain Registration Rights
Agreement  dated even date herewith among the Company,  TSC,  National Union and
O&G, as amended, modified or supplemented from time to time.

     (ff)  "ROFR  Shares"  means:  (i)  as  to  National  Union,  its  Permitted
Transferees  and any  Co-Investors,  any  Put/Call  Shares  owned by such  party
(including  Shares issued on account of any subsequent  Common Stock  dividends,
stock  splits,  reverse  stock  splits or other  similar  transactions  relating
thereto), and (ii) as to TSC and its Permitted Transferees,  any Shares owned by
such party immediately following the Closing (including Shares issued on account
of any subsequent Common Stock dividends,  stock splits, reverse stock splits or
other similar transactions relating thereto).

     (gg) "SEC" means the Securities and Exchange Commission.

     (hh) "Securities Act" means the Securities Act of 1933, as amended.

                                       5

     (ii) "Securities Purchase Agreement" means that certain Securities Purchase
Agreement  dated as of February 5, 2000  entered  into by and among the Company,
TSC,  National Union and O&G relating to the purchase and sale of Covered Common
Stock, as amended, modified or supplemented from time to time.

     (jj)  "Shareholder"  has the  meaning  ascribed  to it in the  introductory
paragraph to this Agreement and also includes any Permitted Transferee,  whether
in  connection  with  its  execution  and  delivery  as of the date  hereof,  or
otherwise, so long as such Person Beneficially Owns any Shares and the Agreement
has not terminated.

     (kk)  "Shares"  means shares of Covered  Common Stock as adjusted for stock
splits,  reverse  stock splits and Common Stock  dividends  declared and paid on
account of Covered Common Stock and similar transactions.

     (ll)  "Subsidiary"  means any Person of which a  Shareholder  or  Permitted
Transferee  shall now or hereafter own or be owned by,  directly or  indirectly,
through one or more Subsidiaries or otherwise, a Person holding equity interests
representing 100% of the voting securities of such Person.

     (mm) "Target  Investment  Value per Share" means, as of the date of any Put
Notice or Call Notice,  the amount to be paid to National Union or its Permitted
Transferee,  if any,  such that the internal  rate of return  (calculated  on an
annual basis) on National  Union's  Initial  Investment  per Share,  taking into
account  Distributions,  shall be equal to the Put Return or Call Return, as the
case may be.

     (nn)  "Trading  Day" with  respect to a  securities  exchange or  automated
quotation  system  means a day on which such  exchange  or  automated  quotation
system is open and conducting business.

     (oo)  "Transfer"   (including   with   correlative   meanings,   the  terms
"transferring" and "transferred") means the direct or indirect sale, assignment,
transfer,  grant of a participation  or derivative  interest in, pledge or other
disposition  of any Shares (or  solicitation  of any offers to buy or  otherwise
acquire, or take a pledge of, any Shares).

     (pp) "ULLICO" has the meaning ascribed to it in the introductory  paragraph
of this Agreement.

     (qq)  "Voting  Security"  means at any time  shares of any class of capital
stock of the Company which are then  entitled to vote  generally in the election
of directors.

     SECTION 1.02 Other  Terms.  Each of the  following  terms is defined in the
Section set forth opposite such term:

                  Term                                        Section
                  ----                                        -------

                  Assignee                                    3.07
                  Call Closing                                4.05
                  Call Notice                                 4.04

                                       6


                  Call Option                                 4.01
                  Call Period                                 4.02
                  Call Postponement                           4.07
                  Call Price                                  4.05
                  Call Purchaser                              4.01
                  Call Seller                                 4.01
                  Co-Investor                                 2.03
                  Disposing Shareholder                       6.01
                  NOLs                                        2.04
                  Offer                                       5.01
                  Offered Shares                              5.01
                  Offered Shares Closing                      5.03
                  Permitted Transferee                        2.03
                  Proposed Transferee                         5.01
                  Public Offering                             2.03
                  Purchasing Shareholder                      5.02
                  Put Closing                                 3.06
                  Put Event Period                            3.02
                  Put Notice                                  3.04
                  Put Option                                  3.01
                  Put Period                                  3.02
                  Put Price                                   3.05
                  Put Postponement                            3.09
                  Put Purchaser                               3.01
                  Put Seller                                  3.01
                  Selling Shareholder                         5.01
                  Subscription Notice                         7.07

                                   ARTICLE II

                   Shares Subject to this Agreement; Transfers

     SECTION 2.01 Shares Subject to this Agreement. Except as otherwise provided
in any Article of this Agreement, the Shares owned by any Shareholder, Permitted
Transferee or Co-Investor  from time to time shall be subject to this Agreement.
Shares transferred by any Shareholder, Permitted Transferee or Co-Investor shall
not be  entitled  to the  benefits  of, or subject to the  obligations  in, this
Agreement unless otherwise expressly provided for in this Agreement.

     SECTION 2.02 Restrictions on Transfer. No Shareholder, Permitted Transferee
or Co-Investor  may,  directly or  indirectly,  Transfer to third parties or any
other shareholder of the Company, any Shares (including, in the case of National
Union or its Permitted  Transferee,  the Put/Call Shares),  in whole or in part,
unless both (i) such  Shares are  Transferred  pursuant to Section  2.04 of this
Agreement,  and (ii) such Shares are  Transferred,  directly or  indirectly,  in
accordance  with Articles III, IV, V and VI of this Agreement to the extent such
provisions  are

                                       7


applicable. For purposes hereof, an indirect Transfer shall include the Transfer
of  Control  of any  Shareholder  except  where  the  indirect  transferee  is a
Permitted Transferee.

     SECTION 2.03 Permitted Transferees; Co-Investors; Public Offerings.

     (a) A  "Permitted  Transferee"  shall mean,  as to any  Shareholder,  (i) a
Subsidiary  of  such  Shareholder,  (ii)  any  Person  that  owns,  directly  or
indirectly, 100% of the outstanding capital stock of such Shareholder or (iii) a
Subsidiary  of a  person  described  in  clause  (ii).  A  Shareholder  shall be
permitted to Transfer up to 100% of its Shares to a Permitted Transferee without
first  complying with any provisions of this Agreement  other than Sections 2.04
and 2.05.  A Permitted  Transferee  shall be entitled to the benefits of, and be
subject to the obligations in, this Agreement.  A Permitted  Transferee shall be
required to execute and deliver a counterpart  of this  Agreement and such other
agreements as the Shareholders and the Company shall reasonably request agreeing
to be bound  hereby  and such  Permitted  Transferee  shall  be  deemed  to be a
Shareholder hereunder and a party to this Agreement.

     (b)  A  "Co-Investor"  shall  mean  any  Person  (other  than  a  Permitted
Transferee or a purchaser in a bona fide  registered  public  offering) to which
any  Shareholder,   Permitted   Transferee  or  Co-Investor   Transfers  Shares.
Notwithstanding anything herein to the contrary, (x) a Co-Investor shall have no
rights or obligations  under Articles III, IV, V or VI of this Agreement (except
as otherwise  provided in Sections 5.04 or 6.02),  and (y) a  Co-Investor  shall
have no rights to nominate a director  under Article VII but shall be subject to
the voting requirements of Sections 7.02 and 7.03 thereof.

     (c) A  Shareholder  shall be permitted to Transfer up to 100% of its Shares
(other  than  Put/Call  Shares) to a bona fide  purchaser  through a  registered
public offering  pursuant to registration  rights granted under the Registration
Rights  Agreement  (a  "Public  Offering")  without  first  complying  with  any
provisions  of this  Agreement  other than Sections 2.04 and 2.05 and Articles V
and VI. Persons who acquire their Shares in a Public Offering shall not have any
rights or obligations under this Agreement and shall not become parties hereto.

     SECTION 2.04  Restrictions  on Transfer  Relating to  Preservation of NOLs.
Notwithstanding  any  other  provision  of the  Agreement  to the  contrary,  to
preserve  the  Company's  ability  to  fully  utilize  its  net  operating  loss
carryforwards ("NOLs"),  which each Shareholder deems to be a material favorable
attribute of its investment in the Equity Securities of the Company, each of the
Shareholders,  their Permitted  Transferees and the Co-Investors  agrees that it
will not  purchase  or sell any  Equity  Securities  of the  Company  during the
three-year  period  commencing  on the Closing  Date unless it meets each of the
following four conditions:

     (a) Such Shareholder, Permitted Transferee or Co-Investor shall notify each
of the Company and the other  parties  hereto in writing at least  fifteen  (15)
Business Days in advance of any proposed purchase or sale;

     (b) Other  than with  respect  to  Put/Call  Shares  being  Transferred  in
accordance with Article III or IV of this Agreement,  all the other Shareholders
shall be given the  opportunity to participate in any proposed  purchase or sale
in  proportion  to the amount of Equity

                                       8



Securities of the Company held by such  Shareholder as of the date of the notice
referred to in clause (a);

     (c) Each Shareholder,  Permitted Transferee or Co-Investor shall consummate
any  proposed  purchase  or sale only to the extent  that tax  advisors  for the
Company (or in the  alternative,  tax  advisors  retained  by the selling  party
reasonably  acceptable  to the Company and the  Shareholders)  have provided the
Company with written  advice that the proposed  purchase or sale will not impair
the ability of the  Company to fully  utilize its  remaining  NOLs;  the Company
shall use  commercially  reasonable  efforts to obtain tax advice referred to in
this clause (c) from its tax advisors and shall  cooperate  with the  reasonable
requests for information  from the Shareholders or their respective tax advisors
retained pursuant to this clause (c); and

     (d) Each Permitted  Transferee and Co-Investor  shall execute and deliver a
counterpart of this Agreement or such other  agreements as the  Shareholders and
the Company shall reasonably  request as to the existence and  enforceability of
Sections 2.04 and 2.05 and such  Permitted  Transferee or  Co-Investor  shall be
deemed to be a  Shareholder  hereunder  and a party to this  Agreement  for such
purposes.

     In  addition,  each of the  Shareholders  and  their  respective  Permitted
Transferees  agrees that during the three year period  commencing on the Closing
Date,  it will - and it will use  commercially  reasonable  efforts to cause any
director designated by it to - vote against any issuance or redemption of Equity
Securities  by the  Company if such  issuance  or  redemption  would  impair the
ability of the Company to fully utilize its remaining  NOLs unless such issuance
or  redemption is authorized by  Shareholders  and their  Permitted  Transferees
holding at least two-thirds of the Shares then held by such persons.

     SECTION  2.05  Attempted  Transfers in  Violation  of this  Agreement.  Any
attempt by a Shareholder, Permitted Transferee or Co-Investor to transfer Equity
Securities of the Company or any interest  therein,  directly or indirectly,  to
any Person in violation  of any  provision  of this  Agreement  shall be void ab
initio  and the  Company  shall  have no  obligation  to,  and shall  refuse to,
register such Equity Securities of the Company in the name of the transferee and
the transferee shall have no rights with respect to such Equity Securities.

     SECTION 2.06 Legend.

     (a) In  addition to any other  legend that may be required  pursuant to the
Securities Purchase Agreement or otherwise, each certificate for the Shares that
is issued to any Shareholder  shall bear a legend in substantially the following
form:

          "THE  SECURITIES  REPRESENTED  BY  THIS  CERTIFICATE  ARE  SUBJECT  TO
          RESTRICTIONS  ON  TRANSFER  (INCLUDING  RIGHTS  OF FIRST  REFUSAL  AND
          TAG-ALONG  RIGHTS),  ALL AS SET FORTH IN THE  SHAREHOLDERS'  AGREEMENT
          DATED AS OF MARCH 29, 2000. THE HOLDER OF THIS CERTIFICATE MAY REQUEST
          A COPY OF THE  SHAREHOLDERS'  AGREEMENT  FROM THE  COMPANY,  A COPY OF
          WHICH THE COMPANY WILL

                                       9



          MAIL TO THE HOLDER OF THIS CERTIFICATE  WITHOUT CHARGE WITHIN FIVE (5)
          DAYS AFTER  RECEIPT OF THE REQUEST  ADDRESSED TO THE  SECRETARY OF THE
          COMPANY."

     (b) In addition to any other legend that may be required,  each certificate
for the Put  Shares  that is issued to any  Shareholder  shall  bear a legend in
substantially the following form:

          "THE  SECURITIES  REPRESENTED BY THIS  CERTIFICATE ARE ALSO SUBJECT TO
          PUT AND CALL OPTIONS AS SET FORTH IN THE SHAREHOLDERS' AGREEMENT DATED
          AS OF MARCH 29,  2000 AND ARE NOT  TRANSFERABLE  EXCEPT  AS  PERMITTED
          UNDER THAT  AGREEMENT.  THE HOLDER OF THIS  CERTIFICATE  MAY REQUEST A
          COPY OF THE SHAREHOLDERS'  AGREEMENT FROM THE COMPANY, A COPY OF WHICH
          THE COMPANY WILL MAIL TO THE HOLDER OF THIS CERTIFICATE WITHOUT CHARGE
          WITHIN  FIVE (5) DAYS AFTER  RECEIPT OF THE REQUEST  ADDRESSED  TO THE
          SECRETARY OF THE COMPANY."

     (c) In addition to any other legend that may be required,  each certificate
for Equity  Securities that is issued to any Shareholder  shall bear a legend in
substantially the following form:

          "THE  SECURITIES  REPRESENTED  BY  THIS  CERTIFICATE  ARE  SUBJECT  TO
          ADDITIONAL RESTRICTIONS ON TRANSFER IN ORDER TO PRESERVE THE COMPANY'S
          ABILITY TO UTILIZE ITS NET OPERATING LOSS  CARRYFORWARDS  AS SET FORTH
          IN THE SHAREHOLDERS'  AGREEMENT DATED AS OF MARCH 29, 2000 AND ARE NOT
          TRANSFERABLE  EXCEPT AS PERMITTED UNDER THAT AGREEMENT.  THE HOLDER OF
          THIS  CERTIFICATE  MAY REQUEST A COPY OF THE  SHAREHOLDERS'  AGREEMENT
          FROM THE COMPANY,  A COPY OF WHICH THE COMPANY WILL MAIL TO THE HOLDER
          OF THIS CERTIFICATE  WITHOUT CHARGE WITHIN FIVE (5) DAYS AFTER RECEIPT
          OF THE REQUEST ADDRESSED TO THE SECRETARY OF THE COMPANY.

     (d) The same  legends  shall be placed on all  certificates  for Shares and
other Equity Securities,  as the case may be, that are or become subject to this
Agreement.  The failure to place legends on a  certificate  shall not affect the
application of this Agreement to the Shareholders.

     (e) If any Shares shall cease to be subject to the restrictions on Transfer
under this Article II, the holder may request that the Company remove the legend
set forth in  Section  2.06(a)  or, if the  Shares  shall  cease to be  Put/Call
Shares,  the holder may  request

                                       10


          the Company to remove the legend set forth in Section 2.06(b),  or, if
          Equity  Securities  shall cease to be subject to the  restrictions  on
          Transfer set forth in Section 2.04, the holder may request the Company
          to remove  the  legend  set forth in  Section  2.06(c)and  issue a new
          certificate  evidencing such Equity Securities  without the applicable
          legend  required to be endorsed  thereon,  if such legend is no longer
          applicable.

                                  ARTICLE III

                                   Put Rights

     SECTION  3.01 Put Option.  Subject to Section  2.04 (other than  subsection
2.04(b)), National Union and its Permitted Transferees, if any (collectively the
"Put Seller") shall have the right, at their collective discretion, to cause TSC
or its Assignee (as hereafter defined) (a "Put Purchaser") to purchase (the "Put
Option")  all (but not less than all) of the  Put/Call  Shares  owned by the Put
Seller as of the date  notice  is given  pursuant  to  Section  3.03;  provided,
however,  that during a Put Event  Period  triggered by a Put Event set forth in
subclauses (i), (ii),  (iii),  (iv) or (v) thereof,  National Union may elect to
include within the term  "Put/Call  Shares" for purposes of this Article III any
other Shares  purchased by National Union at Closing then owned by it (including
Shares issued on account of any subsequent Common Stock dividends, stock splits,
reverse stock splits or other similar transactions relating thereto).

     SECTION 3.02 Put Period. The "Put Period" shall be the period commencing on
the third  anniversary of the Closing and ending on the sixth anniversary of the
Closing. In addition, a "Put Event Period" shall also commence on the occurrence
of a Put Event and shall continue for ninety (90) days thereafter.

     SECTION 3.03 Put Notice.  The Put Seller  shall  exercise the Put Option by
delivery  of written  notice to the Put  Purchaser  during the Put Period or Put
Event  Period,  as the case may be. Upon  receipt of a Put Notice in  accordance
with the terms  hereof,  the Put Seller  shall be  obligated  to sell all of the
Put/Call Shares then  outstanding  free and clear of all liens and  encumbrances
created by it or its Affiliates  (other than pursuant to this Agreement) and the
Put Purchaser  shall be obligated to purchase all of such Put/Call Shares at the
applicable  Put Price in  accordance  with,  and subject  to, the terms  hereof;
provided,  however,  that the Put Option may not be  exercised if the Put Seller
has breached the  requirements of Article 2 hereof for so long as such breach is
continuing.

     SECTION 3.04 Put Price. The "Put Price" shall be the product of the (a) the
number of Put/Call Shares outstanding  subject to the Put Option,  multiplied by
(b) the Target  Investment  Value per Share. At the Put Closing,  the Put Seller
will distribute to the Put Purchaser the Distributable Property-in-Kind.

     SECTION 3.05 Put Closing.  The closing of the purchase and sale of Put/Call
Shares pursuant to the Put Option,  shall take place at the principal  office of
the Put  Purchaser  on a  Business  Day to be  mutually  agreed  upon by the Put
Purchaser  and Put  Seller,  which  date shall be as soon as  practicable  after
receipt of the Put Notice (the "Put Closing");  provided,  however,  that if the
purchase of Put/Call Shares is subject to prior regulatory  approval or requires
the

                                       11


determination  of Fair Market Value,  the parties will use their reasonable best
efforts to obtain the necessary  regulatory  approvals or  determination of Fair
Market Value and Put Closing shall be postponed until the expiration of five (5)
Business Days after the later of (i) all such  regulatory  approvals  shall have
been  received  or (ii)  the  determination  of Fair  Market  Value.  At the Put
Closing,  the Put Seller shall deliver to the Put Purchaser (A) the certificates
representing  the Put/Call  Shares duly endorsed or  accompanied by stock powers
executed in blank,  in form and  substance  satisfactory  to the Put  Purchaser,
together with all other documents required to be executed in connection with the
sale of the Put/Call Shares and evidence  satisfactory to the Put Purchaser that
the  Put/Call  Shares  are  being  transferred  free and  clear of all liens and
encumbrances  created  by  the  Put  Seller  or  its  Affiliates,  and  (B)  all
Distributable Property-in-Kind (it being understood that in no event shall a Put
Seller be obligated to make any  representations  and warranties,  or to provide
any indemnities,  with respect to any matters other than title to the Put Shares
and Distributable  Property-in-Kind  held by such Person,  such title being free
and clear of all liens and  encumbrances  created by it or its  Affiliates,  and
such Person's  authority,  authorization  and right to enter into and consummate
the sale without contravention of any law or agreement, and without the need for
any  third  party  consent  or  approval  (not  including  any  governmental  or
regulatory  consent or  approval  which shall have been  received)).  At the Put
Closing,  the Put Purchaser  shall pay the Put Price by delivery of cash by wire
transfer to the account of the Put Seller.  At the Put  Closing,  the Put Seller
will transfer the Distributable Property-in-Kind to the Put Purchaser.

     SECTION  3.06  Assignment  of Put  Option.  TSC may  assign  its rights and
obligations to purchase the Put/Call Shares to an Affiliate,  including RNT, the
Company  or  a  Permitted  Transferee  (the  "Assignee"),  in  which  event  all
references  to TSC shall be deemed to refer to any  Assignee  and such  Assignee
shall be deemed a party to this Agreement.  Notwithstanding an assignment of the
Put Option by TSC or its  Permitted  Transferee,  TSC shall remain  liable under
this  Article  III.  The rights  and  obligations  of the Put Seller  under this
Article III are not assignable without the consent of TSC.

     SECTION  3.07 RNT  Obligation  Under Put  Option.  RNT shall be jointly and
severally liable for all obligations of TSC under this Article III.

     SECTION  3.08 Put  Postponement.  Notwithstanding  anything  herein  to the
contrary,  the Put Seller may not  exercise  the Put Option if  prohibited  from
doing so under Article II or applicable law,  provided the Put Purchaser and Put
Seller,  as  applicable,  shall take all  reasonable  steps to comply  with such
applicable law.

     SECTION 3.09 Exercise of Put Option Not a Transfer. Neither the exercise by
the Put  Seller  of the Put  Option,  nor the  consummation  of the  transaction
contemplated  thereby,  shall constitute a Transfer that is subject to the right
of first  refusal  set forth in Article V or that is  subject  to the  tag-along
rights set forth in Article VI.

                                       12

                                   ARTICLE IV

                                   Call Rights

     SECTION  4.01 Call Option.  Subject to Section 2.04 (other than  subsection
2.04(b)),  TSC or its Assignee (in either case,  the "Call  Purchaser")  has the
right,  at  its  sole  option,   to  cause  National  Union  and  its  Permitted
Transferees, if any (collectively the "Call Seller") to sell (the "Call Option")
to TSC or its Assignee  all (but not less than all) of the Put/Call  Shares held
by the Call Seller as of the date notice is given pursuant to Section 4.03.

     SECTION 4.02 Call Period.  The "Call Period" shall be the period commencing
on the third  anniversary of the Closing and ending on the sixth  anniversary of
the Closing. In addition, a Call Period shall also commence on the occurrence of
a Call Event and shall continue for ninety (90) days thereafter. Notwithstanding
anything  in this  Agreement  to the  contrary,  the Call  Period  (and the Call
Option)  shall  terminate  upon (i) a change of Control of the  Company;  (ii) a
change of Control of TSC;  (iii) one or more Transfers (other than a Transfer to
a Permitted Transferee) by TSC and its Permitted Transferees of shares of Common
Stock such that RNT fails to have sole direct or indirect  Beneficial  Ownership
of at least 10% of the  outstanding  Common Stock of the Company  (for  purposes
hereof,  the voting securities of the Company  Beneficially  Owned,  directly or
indirectly, by TSC shall be deemed solely Beneficially Owned indirectly by RNT),
(iv) RNT not being  involved  in the  management  of the  Company or TSC, or (v)
breach of any  provisions of the Definitive  Agreements  arising out of the sole
actions of RNT or TSC.

     SECTION 4.03 Call Notice.  A Call Purchaser  shall exercise its Call Option
by delivery of written  notice to the Call Seller  during the Call Period.  Upon
receipt of a Call Notice in accordance  with the terms  hereof,  the Call Seller
shall be obligated to sell all of its or their Put/Call Shares free and clear of
all liens and encumbrances  created by it or its Affiliates (other than pursuant
to this  Agreement) and the Call Purchaser shall be obligated to purchase all of
its or their Put/Call  Shares at the Call Price in accordance  with, and subject
to, the terms hereof.

     SECTION 4.04 Call Price.  The "Call Price" for the Put/Call Shares shall be
the product of the (a) the number of Put/Call Shares  outstanding and subject to
the Call Option, multiplied by (b) the Target Investment Value per Share. At the
Call  Closing,  the  Call  Seller  with  distribute  to the Call  Purchaser  the
Distributable Property-in-Kind.

     SECTION 4.05 Call Closing. The closing of the purchase and sale of Put/Call
Shares pursuant to the Call Option,  shall take place at the principal office of
the Call  Purchaser  on a Business  Day to be  mutually  agreed upon by the Call
Purchaser and the Call Seller,  which date shall be as soon as practicable  days
after receipt of the Call Notice (the "Call Closing");  provided,  however, that
if the purchase of Put/Call  Shares is subject to prior  regulatory  approval or
requires  the  determination  of Fair Market  Value,  the parties will use their
reasonable  best  efforts  to  obtain  the  necessary  regulatory  approvals  or
determination of Fair Market Value and the Call Closing shall be postponed until
the  expiration  of five  (5)  Business  Days  after  the  later of (i) all such
regulatory  approvals shall have been received or (ii) the determination of Fair
Market  Value.  At the Call  Closing,  the Call Seller shall deliver to the Call
Purchaser (A) the certificates representing the Put/Call Shares duly endorsed or
accompanied  by  stock  powers

                                       13


executed in blank,  in form and substance  satisfactory  to the Call  Purchaser,
together with all other documents required to be executed in connection with the
sale of the Put/Call Shares and evidence satisfactory to the Call Purchaser that
the  Put/Call  Shares  are  being  transferred  free and  clear of all liens and
encumbrances  created  by  the  Call  Seller  or its  Affiliates,  and  (B)  all
Distributable  Property-on-Kind  (it being  understood  that in no event shall a
Call Seller be  obligated  to make any  representations  and  warranties,  or to
provide any  indemnities,  with  respect to any matters  other than title to the
Put/Call Shares and  Distributable  Property-in-Kind  held by such Person,  such
title  being free and clear of all liens and  encumbrances  created by it or its
Affiliates,  and such Person's authority,  authorization and right to enter into
and  consummate  the sale without  contravention  of any law or  agreement,  and
without the need for any third  party  consent or approval  (not  including  any
governmental or regulatory consent or approval which shall have been received)).
At the Call Closing,  the Call Purchaser shall pay the Call Price by delivery of
cash by wire  transfer to the account of the Call Seller.  At the Call  Closing,
the Call Seller will  transfer the  Distributable  Property-in-Kind  to the Call
Purchaser.

     SECTION  4.06  Assignment  of Call  Option.  TSC may  assign its rights and
obligations  to purchase the Put/Call  Shares to any Permitted  Transferee  and,
with the  consent  of  National  Union to such  transfer  of the Call  Option in
writing (which consent shall be in the sole discretion of National Union and may
be granted or withheld for any reason or no reason), to any other Assignee.

     SECTION  4.07 Call  Postponement.  Notwithstanding  anything  herein to the
contrary, the Call Purchaser may not exercise the Call Option if prohibited from
doing so under applicable law,  provided the Call Purchaser and Call Seller,  as
applicable, shall take all reasonable steps to comply with such applicable law.

     SECTION 4.08  Exercise of Call Option Not a Transfer.  Neither the exercise
by  the  Call  Purchaser  of  the  Call  Option,  nor  the  consummation  of the
transaction  contemplated thereby shall constitute a Transfer that is subject to
the right of first  refusal  set forth in  Article V or that is  subject  to the
tag-along rights set forth in Article VI.

                                   ARTICLE V

                             Rights of First Refusal

     SECTION 5.01 Right of First Refusal on Transfers.

     (a) Only National Union,  TSC and their  respective  Permitted  Transferees
shall  have any  rights and  obligations  under this  Article V (each a "Selling
Shareholder").  Subject  to  Sections  2.04,  5.04  and  5.05,  if  any  Selling
Shareholder  desires to Transfer  all or any part of the ROFR Shares owned by it
pursuant  to a bona fide offer from a third party (the  "Proposed  Transferee"),
the Selling  Shareholder(s)  shall submit a written  offer (the "Offer") to sell
such shares (the "Offered Shares") on terms and conditions, including price, not
less favorable than those on which the Selling  Shareholder(s)  proposes to sell
such  Offered  Shares  to the  Proposed  Transferee  to TSC  and  its  Permitted
Transferees  (if the  Selling  Shareholder  is National  Union or its  Permitted
Transferees) or to National Union and its

                                       14


Permitted Transferees (if the Selling Shareholder is TSC, RNT or their Permitted
Transferees);  in either  case,  the parties to whom the Selling  Shareholder(s)
offer their shares are referred to in this Article V as the "Offerees".

     (b) The rights of TSC or its Permitted  Transferees,  on the one hand,  and
National  Union and its  Permitted  Transferees,  on the other hand,  under this
Article V shall be in addition to and not in  substitution  of their  respective
rights  under  the Put  Option  or Call  Option,  as the case  may be,  in their
discretion.

     (c) So long as the Put Option and Call Option shall  remain in effect,  any
Put/Call  Shares not  otherwise  Transferred  as permitted  under  Section 2.03,
Article V or Article VI shall  continue to be subject to Articles III and IV, as
the case may be.

     (d) The Offer shall disclose the identity of the Proposed  Transferee,  the
number of Offered  Shares  proposed to be sold,  the total number of ROFR Shares
owned by the Selling Shareholder(s),  the terms and conditions (including price)
of the proposed  sale,  and any other  material  facts  relating to the proposed
sale. The Offer shall further state that the Offerees may acquire, in accordance
with the provisions of this Agreement, the Offered Shares for the price and upon
the other terms and conditions,  including deferred payment (if applicable), set
forth therein.

     SECTION  5.02  Notice of Intent  to  Purchase.  If an  Offeree  desires  to
purchase the Offered Shares  offered to it, it shall  communicate in writing its
election to purchase to the Selling Shareholder(s) and each other Offeree within
fifteen (15) days of the date of the Offer (each party providing such notice,  a
"Purchasing  Shareholder") . A Purchasing Shareholder may also, but shall not be
required  to,  state  that  it  is  exercising  an  over-allotment   right  (the
"Over-Allotment  Right")  and the  number  of Shares it is  willing  to  acquire
pursuant to such  right;  if any Offeree  does not  exercise  its right of first
refusal pursuant to Section 5.01(a)(i),  such Shares shall be allocated pro rata
among the Purchasing  Shareholders exercising the Over-Allotment Right up to the
maximum  amount  stated  in  such   Purchasing   Shareholder's   notices.   Such
communication  shall,  when taken in  conjunction  with the Offer,  be deemed to
constitute a valid, binding and enforceable  agreement for the sale and purchase
of the Offered Shares.

     SECTION 5.03 Offered Shares  Closing.  The closing of the purchase and sale
of  Offered  Shares  pursuant  to the Offer,  shall take place at the  principal
office of the Selling  Shareholder(s) on a Business Day to be mutually agreed to
by the Selling  Shareholder(s) and the Purchasing  Shareholder(s)  (the "Offered
Shares Closing"),  provided that if the purchase of Offered Shares is subject to
prior regulatory approval, the parties will use their reasonable best efforts to
obtain the necessary  regulatory  approvals and the Offered Shares Closing shall
be  postponed  until the  expiration  of five (5)  Business  Days after all such
regulatory  approvals  shall have been received.  At the Offered Shares Closing,
the Selling  Shareholder(s)  shall deliver to the Purchasing  Shareholder(s) the
certificates  representing  the Offered  Shares duly endorsed or  accompanied by
stock  powers  executed  in blank,  in form and  substance  satisfactory  to the
Purchasing  Shareholder(s),  together  with all other  documents  required to be
executed  in  connection  with  the  sale of the  Offered  Shares  and  evidence
satisfactory to the Purchasing  Shareholder(s) that the Offered Shares are being
transferred free and clear of all liens and encumbrances  created by the Selling
Shareholder(s)  or its Affiliates (it being  understood that in

                                       15


no event shall a Selling  Shareholder  be obligated to make any  representations
and warranties, or to provide any indemnities, with respect to any matters other
than title to the Offered Shares held by such Person,  such title being free and
clear of all liens and  encumbrances  created by it or its Affiliates,  and such
Person's  authority,  authorization  and right to enter into and  consummate the
sale without contravention of any law or agreement, and without the need for any
third party consent or approval (not  including any  governmental  or regulatory
consent or approval  which  shall have been  received)).  At the Offered  Shares
Closing  the  Purchasing  Shareholder(s)  shall pay the  purchase  price for the
Offered  Shares in such  amount  and on such  payment  terms as set forth in the
Offer.

     SECTION 5.04 Sale to Third Party.  If the  Shareholders do not purchase all
of the Offered  Shares,  the Offered  Shares not so purchased may be sold by the
Selling  Shareholder(s)  at any time  within  sixty (60) days after the date the
Offer was made.  Any such sale shall be to the Proposed  Transferee  at not less
than the price and upon other terms and  conditions  not more  favorable  to the
Proposed Transferee than those specified in the Offer. If any Offered Shares are
not sold  within the sixty  (60)-day  period or if the terms of the Offer  shall
change,  the  Offered  Shares  shall be subject to renewed  compliance  with the
requirements  of the right of first refusal  pursuant to Section 5.01. Any third
party to whom  Shares  are sold  shall  become a  Co-Investor  and shall have no
rights or  obligations  under this  Agreement  except as  provided  in  Sections
2.02(i),  2.03(b), 2.04 and 2.05 and Sections 7.02 and 7.03, provided,  however,
that if (x) the Transfer to a Co-Investor is a Transfer by National Union or its
Permitted  Transferee  of Put/Call  Shares and if the price to be paid equals or
exceeds  the  Target  Investment  Value  per Share  (using  the Call Rate as the
discount  rate) as of the date set for  payment,  then the  Put/Call  Shares  so
Transferred  shall  continue to be subject to the Call Option and the purchasing
Co-Investor  shall execute such documents as are reasonably  requested by TSC or
its Assignee as to the  existence  and  enforceability  of the Call Option,  and
(y) if the  Transfer to a  Co-Investor  is a Transfer  by National  Union or its
Permitted Transferee of Put/Call Shares and if RNT consents to such Transfer and
the continuation of the Put Option and the Call Option in writing (which consent
shall be in the sole  discretion  of RNT and may be granted or withheld  for any
reason or no reason),  then the Put/Call Shares so Transferred shall continue to
be subject to the Put Option and the Call Option.

     SECTION 5.05  Limitation as to National  Union.  The rights and obligations
set forth in this Article V shall not apply to any Shares  purchased by National
Union other than the Put/Call Shares.

                                   ARTICLE VI

                                Tag-Along Rights

     SECTION 6.01  Tag-Along  Option.  Subject to Sections 2.04 and 6.03 of this
Agreement,  if a  Shareholder  (a "Disposing  Shareholder")  (i) decides to sell
Shares and (ii) either  (x) any one or more of the other  Shareholders  have not
exercised  their right of first  refusal as provided in Article V and  purchased
the Offered  Shares or (y) the  Shares in question are not subject to Article V,
the Disposing  Shareholder  will cause the intended  purchaser of such Disposing
Shareholder's  Shares to afford to each party hereto that is a  Shareholder  for
purposes

                                       16


of this Article VI (each, a "Non-Exercising  Shareholder"),  at its option,  the
opportunity to sell (and will require the prospective purchaser to purchase) the
Shares held by such  Non-Exercising  Shareholders  in the same proportion to the
aggregate  number  of  Shares  sought  to be  disposed  of in  such  sale by the
Disposing Shareholder and Non-Exercising  Shareholders and on the same terms and
conditions  as those to be sold by the Disposing  Shareholder,  and for the same
consideration  per share. The Disposing  Shareholder's  obligation to afford the
Non-Exercising  Shareholders,  or cause the  Non-Exercising  Shareholders  to be
afforded,  the  opportunity  and rights set forth in this  Article VI,  shall be
discharged if the  Non-Exercising  Shareholders  are given written  notice which
allows  such  Non-Exercising  Shareholders  thirty  (30)  days to elect to avail
themselves of such rights by written notice to the Disposing Shareholder. If any
Non-Exercising  Shareholder  elects to not  participate  or  otherwise  does not
affirmatively  respond  within  such  thirty  (30)  day  period,  the  Disposing
Shareholders and such  Non-Exercising  Shareholders who have made an affirmative
election to sell their Shares may proceed with the sale,  without  regard to the
application   of   this   Article   VI  to   the   non-electing   Non-Exercising
Shareholder(s).

     SECTION 6.02 Sale to Third Party.  Any such sales shall be at not less than
the price and upon other  terms and  conditions  not more  favorable  than those
specified in the Offer.  If any such Shares are not sold within a sixty (60)-day
period from the date of the Offer,  or if the terms of the Offer  shall  change,
the Shares shall again be subject to the  requirements  of the  tag-along  right
pursuant to Section 6.01. Any third party to whom Shares are sold shall become a
Co-Investor and shall have no rights or obligations hereunder except as provided
in  Sections  2.02(i),  2.03(b),  2.04  and  2.05 and  Sections  7.02 and  7.03,
provided, however, that if the sale to a third party is a sale by National Union
or its Permitted  Transferee of Put/Call Shares and if the price per share to be
paid exceeds the Target  Investment  Value per Share (using the Call Rate as the
discount  rate),  then the Put/Call  Shares so Transferred  shall continue to be
subject to the Call Option and the  purchasing  Co-Investor  shall  execute such
documents as are reasonably requested by TSC or its Assignee as to the existence
and enforceability of the Call Option.

     SECTION 6.03  Limitation as to National  Union.  The rights and obligations
set forth in this Article VI shall not apply to any Shares purchased by National
Union other than the Put/Call Shares.

                                  ARTICLE VII

                   The Company's Board Of Directors; Publicity

     SECTION 7.01  Nominees.  (a) Each of the  Shareholders  (together  with its
Permitted  Transferees)  shall  have the  right to  designate  one  person to be
elected to the Board of  Directors of the  Company,  which  designee the Company
shall  nominate  for  director  in  accordance  with its  Charter and By-Laws as
follows:

          (i)  National  Union  and its  Permitted  Transferees,  if any,  shall
     collectively  be entitled to  nominate  one (1) person for  election by the
     Board of Directors  and the Board of Directors of the Company shall appoint
     such  nominee  to fill a vacancy  on the  Board of  Directors  at  Closing.
     Thereafter, the Board of

                                       17


     Directors of the Company shall nominate the person nominated,  from time to
     time, by National  Union or its  Permitted  Transferee as a director of the
     Company for  reelection  as a Class I director  and such  nominee  shall be
     submitted  for  election by  shareholders  as soon as members of such Class
     stand for election,  and each time members of such Class stand for election
     thereafter  subject to the terms hereof;  the right to designate a director
     pursuant  to this  Section  7.01(a)(i)  shall  terminate  at  such  time as
     National Union and its Permitted Transferees  collectively cease to hold at
     least 25% of the Shares National Union acquired at Closing; and

          (ii) O&G and its Permitted  Transferees,  if any, shall be entitled to
     nominate  one (1) person for  election  by the Board of  Directors  and the
     Board of  Directors  of the Company  shall  appoint  such nominee to fill a
     vacancy on the Board of  Directors  at  Closing.  Thereafter,  the Board of
     Directors of the Company shall nominate the person nominated,  from time to
     time, by O&G or its  Permitted  Transferee as a director of the Company for
     reelection  as a Class III director and such nominee shall be submitted for
     election  by  shareholders  as soon as  members  of such  Class  stand  for
     election, and each time members of such Class stand for election thereafter
     subject to the terms hereof;  the right to designate a director pursuant to
     this  Section  7.01(a)(ii)  shall  terminate  at  such  time as O&G and its
     Permitted Transferees collectively cease to hold at least 25% of the Shares
     O&G acquired at Closing;

          (iii) TSC and its Permitted Transferees,  if any, shall be entitled to
     nominate  one (1)  person for  election  to the Board of  Directors  of the
     Company;  the parties hereto agree and acknowledge that RNT shall be deemed
     the designee of TSC; RNT or such other person as may be  designated  by TSC
     shall be submitted for election by  shareholders  as part of the management
     slate each time members of such Class stand for election thereafter subject
     to the terms  hereof;  the right to  designate a director  pursuant to this
     Section  7.01(a)(iii) shall terminate at such time as TSC and its Permitted
     Transferees  collectively  cease to hold at least  25% of the  Shares  they
     acquired at Closing; and

          (iv)  PB  Capital  and  its  Permitted  Transferees,   if  any,  shall
     collectively  be entitled to  nominate  one (1) person for  election to the
     Board of Directors of the Company; the parties hereto agree and acknowledge
     that Michael Klein  ("Klein") shall be deemed the designee of PB Capital as
     of the  date of  this  Agreement;  Klein  or such  other  person  as may be
     designated by PB Capital shall be submitted for election by shareholders as
     part of the  management  slate each time  members  of such Class  stand for
     election  thereafter  subject to the terms hereof; the right to designate a
     director pursuant to this Section  7.01(a)(iv) shall terminate at such time
     as PB Capital and its Permitted  Transferees  collectively cease to hold at
     least 5% of the outstanding shares of Common Stock of the Company; and

          (v) ULLICO and its Permitted  Transferees,  if any, shall collectively
     be  entitled  to  nominate  one (1)  person  for  election  by the Board of

                                       18


     Directors  and the Board of  Directors  of the Company  shall  appoint such
     nominee to fill a vacancy on the Board of Directors at Closing. Thereafter,
     the Board of Directors of the Company shall nominate the person  nominated,
     from time to time, by ULLICO and its Permitted Transferees as a director of
     the Company for reelection as a Class II director and such nominee shall be
     submitted  for  election by  shareholders  as soon as members of such Class
     stand for election,  and each time members of such Class stand for election
     thereafter  subject to the terms hereof;  the right to designate a director
     pursuant to this Section  7.01(a)(v) shall terminate at such time as ULLICO
     and its Permitted Transferees collectively cease to hold at least 5% of the
     outstanding shares of Common Stock of the Company.

     (b) The Company shall use its best efforts to cause each nominee  described
in clause (a) of this Section 7.01 to be nominated to the Board by the directors
of the  Company  as part of the  management  slate  and to be  submitted  to the
shareholders  of the Company for  election at each annual or special  meeting of
the shareholders convened for that purpose so long as each of them has the right
to nominate a director in accordance with this Section 7.01.

     SECTION 7.02 Voting for Election of  Directors.  Each of the  Shareholders,
their respective Permitted Transferees and Co-Investors agree to vote all shares
of  capital  stock of the  Company  then  owned  by it to elect to the  Board of
Directors of the Company any person entitled to be nominated by any of the other
Shareholders (or their  respective  Permitted  Transferees)  pursuant to Section
7.01.

     SECTION 7.03 Vacancy;  Removal. Each Person who nominates a director of the
Company  pursuant  to Section  7.01 shall have the right to cause that person to
resign as a director of the  Company.  Any vacancy on the Board of  Directors of
the Company  created by the  resignation,  removal,  incapacity  or death of any
person  nominated  under  this  Article  VII shall be filled by  another  person
nominated by the Person who nominated  the director  creating such vacancy or by
such  Person's  successors  and assigns.  The  Shareholders  agree to vote their
respective  shares of Common Stock in accordance with such new designation,  and
any such  vacancy  shall  not be filed in the  absence  of a new  nomination  in
accordance with the foregoing sentence.

     SECTION 7.04  Continuation  as Director.  Upon the  occurrence of any event
that results in a  Shareholder  no longer being  entitled to nominate a director
under Section 7.01, the Person so nominated  shall continue as a director of the
Company until his successor is nominated, elected and qualifies.

     SECTION  7.05  Publicity.  To the  extent  that any of the  Company  or any
Shareholder  intends  to issue  any press  release  or make any  similar  public
announcement  or  communication  regarding the execution or  performance of this
Agreement or the other  Transaction  Documents,  the  transactions  contemplated
hereby and thereby,  and the ongoing business  relationship between the parties,
which  release,  announcement  or disclosure  mentions any of such parties,  the
party making the  disclosure  shall consult with each of the parties so named in
such disclosure;  provided,  however,  that no party shall be restrained,  after
consultation

                                       19


with the other parties, to the extent such consultation is feasible, from making
such  disclosure  as it  shall  be  required  to  make by  applicable  law or by
applicable regulations of any regulatory body or securities exchange.

     SECTION 7.06 Observer Rights for Shareholder  Designee.  The Company shall,
for so long as PB Capital and its Affiliates own or control at least 2.5% of the
outstanding shares of Common Stock,  permit one (1) individual  designated by PB
Capital and  acceptable  to the  Company to attend and  observe  meetings of the
Board.  The  Company  shall,  for so long as ULLICO  and its  Affiliates  own or
control at least 2.5% of the outstanding shares of Common Stock,  permit one (1)
individual  designated  by ULLICO and  acceptable  to the  Company to attend and
observe  meetings of the Board.  Each  designee  described in the  preceding two
sentences  shall have the right to receive timely notices of each meeting of the
Board of Directors  and all written  information  provided by the Company to the
Board.  Such designee shall have no right to vote on any matter presented to the
Board,  but otherwise  shall have all rights of a Director,  including:  (a) the
right to examine  books and records of the Company;  (b) the right to review and
participate  in all  discussions  of the Board  including,  without  limitation,
capital  or  equity  programs;  (c) the  right to  receive,  upon  request,  any
information  relating to the Company, and to any Affiliates thereof; and (d) the
right to meet on a regular  basis with the  management  of the  Company,  or any
Affiliates  thereof;  provided that any such designee shall agree to be bound by
all policies relating to  confidentiality  and material  non-public  information
which are  applicable  to the  directors  and senior  executive  officers of the
Company.

     SECTION 7.07 Subscription Rights.

     (a) If the Board of Directors of the Company  shall  authorize the issuance
of New  Securities,  then,  prior to each such issuance of New  Securities,  the
Company shall offer to each Shareholder and its Permitted Transferees a Pro Rata
Share of such New Securities.

     (b) Any  offer  of New  Securities  made to any  Shareholder  or  Permitted
Transferee  under this  Section  7.07  shall be made by notice in  writing  (the
"Subscription  Notice")  at least ten (10)  Business  Days  prior to the date on
which the  meeting of the Board is held to  authorize  the  issuance of such New
Securities.  The  Subscription  Notice  shall set  forth  (i) the  number of New
Securities proposed to be issued and the terms of such New Securities,  (ii) the
consideration  (or manner of determining the  consideration),  if any, for which
such New  Securities  are proposed to be issued and the terms of payment,  (iii)
the  number  of  New  Securities  offered  to  each  Shareholder  and  Permitted
Transferee in compliance  with the  provisions of this Section 7.07 and (iv) the
proposed  date of  issuance of such New  Securities.  Not later than twenty (20)
Business Days after its receipt of a Subscription  Notice,  each Shareholder and
Permitted  Transferee  shall notify the Company in writing  whether it elects to
purchase all or any portion of the New Securities  offered to it pursuant to the
Subscription  Notice.  If a Shareholder or Permitted  Transferee  shall elect to
purchase any such New Securities, the New Securities which it shall have elected
to  purchase  shall be issued and sold to such person by the Company at the same
time and on the same terms and  conditions as the New  Securities are issued and
sold to third  parties.  If, for any reason,  the issuance of New  Securities to
third parties is not  consummated,  the right of the  Shareholders and Permitted
Transferees  to their  respective  Pro

                                       20


Rata Shares of such issuance shall lapse,  subject to their ongoing subscription
right with respect to issuances of New Securities at later dates or times.

     (c) The Company  represents and covenants to each Shareholder and Permitted
Transferee that (i) upon issuance, all the shares of New Securities sold to such
Person pursuant to this Section 7.07 shall be duly  authorized,  validly issued,
fully paid and nonassessable and will be approved (if outstanding  securities of
the Company of the same type are at the time  already  approved)  for listing on
the American Stock Exchange or for quotation or listing on the principal trading
market for the  securities  of the  Company at the time of  issuance,  (ii) upon
delivery  of such  shares,  they shall be free and clear of all  claims,  Liens,
encumbrances,  security  interests  and  charges  of any nature and shall not be
subject to any preemptive  right of any  stockholder of the Company and (iii) in
connection  with any such  issuance,  the Company shall take such actions as are
specified in Section 3.01(q) of the Securities  Purchase  Agreement with respect
to such shares.

                                  ARTICLE VIII

                                  Miscellaneous

     SECTION 8.01 Injunctive  Relief.  The parties hereto  acknowledge and agree
that it will be  impossible to measure the damages that would be suffered if any
party fails to comply with the  provisions of this Agreement that it is required
to comply with and, in the event of any such failure, the non-breaching  parties
will have the right to obtain  specific  performance  of the  breaching  party's
obligations  under this  Agreement and to obtain  immediate  injunctive  relief.
These  rights  shall be in addition  to, and not in  substitution  of, any other
rights that any non-breaching party may have in law or in equity.

     SECTION 8.02 Entire Agreement. Each party expressly acknowledges and agrees
that this  Agreement  is the final  expression  of the  parties  agreement,  and
supercede all prior and contemporaneous agreements and understandings, both oral
and written,  among the  parties,  with  respect to the subject  matter  hereof.
Except as set forth in this Agreement, the Securities Purchase Agreement and the
Registration Rights Agreement,  the parties hereto acknowledge that they are not
parties to, and have no knowledge  of, any  agreements or  understandings,  both
oral  and  written,  to  act  in  concert  or  as a  group  (including,  without
limitation, as a group within the meaning of Section13 (d) of the Exchange Act),
or otherwise act together, with respect to the Company or its securities.

     SECTION 8.03 Binding  Effect;  Benefit.  This Agreement  shall inure to the
benefit and be binding upon the parties hereto and their Permitted  Transferees,
Co-Investors  and Assignees to the extent set forth in this  Agreement;  and, in
the case of a natural person,  upon his successors,  assigns,  heirs,  legatees,
distributees, estates, executors,  administrators,  personal representatives and
other legal representatives. Nothing in this Agreement, expressed or implied, is
intended  to  confer on any  Person  other  than the  parties  hereto  and their
Permitted Transferees, Co-Investors and Assignees; and, in the case of a natural
person, upon his successors,  assigns, heirs, legatees,  distributees,  estates,
executors,   administrators,    personal   representatives   and   other   legal
representatives,  any rights,  remedies,  obligations or liabilities under or by
reason of this

                                       21


Agreement. Nothing in this Agreement,  expressed or implied, shall confer on any
party or Permitted Transferee,  Co-Investor and Assignee;  and, in the case of a
natural person, upon his successors,  assigns,  heirs,  legatees,  distributees,
estates,  executors,  administrators,  personal  representatives and other legal
representatives,  any greater rights, remedies,  obligations or liabilities than
as set forth in this Agreement.

     SECTION 8.04 Assignability.  Except as set forth in this Agreement, neither
this Agreement nor any right, remedy,  obligation or liability arising hereunder
or by reason hereof shall be  assignable by any party hereto or their  Permitted
Transferees or Assignees.

     SECTION 8.05 Amendment; Waiver; Termination. No provision of this Agreement
may be waived  except by an  instrument  in writing  signed by the party against
whom the  waiver is to be  effective.  No  provision  of this  Agreement  may be
amended or  modified  except by an  instrument  in writing  signed by all of the
parties who would have any rights or  obligations  under the relevant  provision
the  Agreement.  This Agreement  shall  terminate on the earlier of (i) the date
that National Union or its Permitted Transferee shall no longer Beneficially Own
any Put/Call Shares, or (ii) the sixth anniversary of the Closing.

     SECTION  8.06  Notices.  All  notices,  consents,  requests,  instructions,
approvals and other communications  provided for herein and all legal process in
regard  hereto  shall be  validly  given,  made or  served,  if in  writing  and
delivered  personally,  by  telecopy  (except  for  legal  process)  or  sent by
registered mail, postage prepaid, if to:

                  The Company:

                           Perini Corporation
                           73 Mt. Wayte Avenue
                           Framingham, Massachusetts  01701
                           Attn:    ........Robert Band, President
                           Facsimile:  .....(508) 628-2960

                                    with a copy to:

                           Goodwin, Procter & Hoar LLP
                           Exchange Place
                           Boston, MA  01209
                           Attn:    ........Richard A. Soden, Esq.
                           Facsimile:  .....(617) 523-1231

                  TSC and RNT:

                           Tutor-Saliba Corp.
                           15901 Olden Street
                           Sylmar, CA  91342-1093
                           Attn:    ........Ronald S. Tutor
                           Facsimile:  .....(818) 367-9574

                                     22


                                    with a copy to:

                           Wilmer, Cutler & Pickering
                           2445 M Street, N.W.
                           Washington, D.C.  20037
                           Attn:    ........Eric R. Markus
                           Facsimile:  .....(202) 663-6363

                  National Union:

                           c/o  AIG Global Investment Corp.
                           175 Water Street
                           26th Floor
                           New York, New York 10038
                           Attn:    ........Christopher H. Lee
                                    ........Chris Saxman
                           Facsimile:.......(212) 458-2250

                                    with a copy to:

                           American International Group, Inc.
                           Law Department
                           70 Pine Street
                           28th Floor
                           New York, New York 10270
                           Attn:    ........John P. Hornbostel
                           Facsimile:.......(212) 363-8596

                  O&G:

                           O&G Industries, Inc.
                           112 Wall Street
                           Torrington, Connecticut 06790
                           Attn:    ........Raymond Oneglia
                                    ........Kenneth Merz
                           Facsimile:.......(860) 626-6498

                                    with a copy to:

                           Murtha, Cullina, Richter & Pinney
                           185 Asylum Street
                           City Place I
                           Hartford, Connecticut 06103-3469
                           Attn:    Timothy Largay
                           Facsimile:.......(860) 240-6150

                                       23

                  BLUM:

                           BLUM Capital Partners, L.P.
                           909 Montgomery Street, Suite 400
                           San Francisco, California 94133
                           Attn:    ........Murray Indick
                           Facsimile:.......(415) 434-3130

                  PB Capital:

                           c/o  BLUM Capital Partners, L.P.
                           909 Montgomery Street, Suite 400
                           San Francisco, California 94133
                           Attn:    ........Murray Indick
                           Facsimile:.......(415) 434-3130

                  The Common Fund:

                           c/o BLUM Capital Partners, L.P.
                           909 Montgomery Street, Suite 400
                           San Francisco, California 94133
                           Attn:    ........Murray Indick
                           Facsimile:.......(415) 434-3130

                  ULLICO:

                           The Union Labor Life Insurance Company
                           111 Massachusetts Avenue, N.W.
                           Washington, D.C. 2001
                           Attn:    ........Robert Kennedy
                           Facsimile:.......(202) 682-4690

                                    with a copy to:

                           Paul, Hastings, Janofsky & Walker LLP
                           555 South Flower Street, 23rd Floor
                           Los Angeles, California 90071
                           Attn:    ........Alan J. Barton
                           Facsimile:.......(213) 627-0705

or to such other  address  or  facsimile  number as any party may,  from time to
time, designate in a written notice given in a like manner.

     SECTION  8.07  Fees and  Expenses.  Each  party  shall pay its own fees and
expenses  (including fees,  expenses and disbursements of counsel) in connection
with this  Agreement and the  performance of each parties  rights,  remedies and
obligations hereunder.

                                       24

     SECTION 8.08  Headings.  The headings  contained in this  Agreement are for
convenience  only and shall not affect the  meaning  or  interpretation  of this
Agreement.

     SECTION 8.09 Counterparts.  This Agreement may be executed in any number of
counterparts,  each of which shall be deemed to be an original  and all of which
together shall be deemed to be one and the same instrument.

     SECTION 8.10 Governing Law; Consent to  Jurisdiction.  This Agreement shall
be governed by and construed  and enforced in accordance  with the internal laws
of the State of New York. Each of the parties hereto irrevocably  submits to the
personal  exclusive  jurisdiction  of the United States  District  Court for the
Southern  District  of New York for the  purposes  of any suit,  action or other
proceeding arising out of this Agreement or any transaction  contemplated hereby
(and, to the extent permitted under applicable rules of procedure, agrees not to
commence any action,  suit or proceeding  relating hereto except in such court).
Each of the parties further agree that service of any process,  summons,  notice
or document hand delivered or sent by registered mail to such party's respective
address set forth in Section 8.06 will be  effective  service of process for any
action,  suit or  proceeding in New York with respect to any matters to which it
has  submitted  to  jurisdiction  as  set  forth  in the  immediately  preceding
sentence.  Each of the parties hereto irrevocably and unconditionally  waive any
objection to the laying of venue of any action,  suit or proceeding  arising out
of this Agreement or the transactions  contemplated  hereby in the United States
District  Court for the  Southern  District  of New  York,  and  hereby  further
irrevocably  and  unconditionally  waive and agree not to plead or claim in such
court that any such action,  suit or  proceeding  brought in such court has been
brought in an inconvenient forum.

     SECTION 8.11 Limitations on Damages.  Each party hereto  acknowledges that,
except as  provided in this  Agreement,  no party is entitled to seek or recover
consequential,  punitive or exemplary damages in respect of this Agreement under
any  circumstances  or  for  any  reason.  Consequential  damages  are,  without
limitation,  lost  profits,  lost  revenue  and the like but do not  include the
actual costs incurred in obtaining substitute performance where there has been a
failure to perform an obligation under any provision of this Agreement.

     SECTION 8.12 Severability.  If any term, provision, covenant or restriction
of this  Agreement is held by a court of competent  jurisdiction  to be invalid,
void or  unenforceable,  the remainder of the terms,  provisions,  covenants and
restrictions  of this Agreement  shall remain in full force and effect and shall
in no way be affected,  impaired or  invalidated.  It is hereby  stipulated  and
declared to be the  intention of the parties  that they would have  executed the
remaining terms, provisions, covenants and restrictions without including any of
such which may be hereafter declared invalid, void or unenforceable.

     SECTION 8.13 Amendments to Laws. Any reference to a section,  form, rule or
regulation  of the  Securities  Act, the Exchange Act or the Code,  includes any
successor section, form, rule, regulation or law.

     SECTION  8.14 No  Third  Party  Beneficiaries.  Nothing  contained  in this
Agreement is intended to confer upon any person or entity other than the parties
hereto and their respective Permitted Transferees,  Co-Investors, successors and
permitted  Assigns,  any benefit,  right or remedies  under or by reason of this
Agreement.

                                       25

     SECTION 8.15 Mutual  Drafting.  This Agreement is the mutual product of the
parties  hereto,  and each  provision  hereof  has been  subject  to the  mutual
consultation, negotiation and agreement of each of the parties, and shall not be
construed for or against any party hereto.

     SECTION  8.16  Further  Representations.   Each  party  to  this  Agreement
acknowledges  and  represents  that it has  been  represented  by its own  legal
counsel in connection with the transactions contemplated by this Agreement, with
the  opportunity  to seek advice as to its legal rights from such counsel.  Each
party further  represents that it is being  independently  advised as to the tax
consequences  of the  transactions  contemplated  by this  Agreement  and is not
relying on any  representation  or statements made by any other party as to such
tax consequences.

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                                       26

     IN WITNESS WHEREOF, each party hereto have caused this Agreement to be duly
executed by himself or its authorized officer as of the day and year first above
written.

                                PERINI CORPORATION
                                (Signatory for the purposes set forth in the
                                Introductory Paragraph of this Agreement only)

                                By:/s/Robert Band
                                Name: Robert Band
                                Title: President


                                TUTOR-SALIBA CORPORATION

                                By:/s/Ronald N. Tutor
                                Name:    Ronald N. Tutor
                                Title:   President and Chief Executive Officer


                                /s/Ronald N. Tutor
                                Ronald N. Tutor


                                NATIONAL UNION FIRE INSURANCE
                                COMPANY OF PITTSBURGH, PA.

                                By:/s/David B. Pinkerton
                                Name: David B. Pinkerton
                                Title: Vice President


                                O&G INDUSTRIES, INC.
                                (Signatory for the purposes set forth in the
                                Introductory Paragraph of this Agreement only)

                                By:/s/Raymond R. Onelgia
                                Name: Raymond R. Oneglia
                                Title: Vice Chairman

                                       27

                                BLUM CAPITAL PARTNERS, L.P.
                                (Signatory for the purposes set forth in the
                                Introductory Paragraph of this Agreement only)

                                By:      Richard C. Blum & Associates, Inc.,
                                         its general partner

                                         By:/s/Muray A. Indick
                                         Name:  Murray A. Indick
                                         Title:  Partner, General Counsel and
                                                 Secretary


                                PB CAPITAL PARTNERS, L.P.
                                (Signatory for the purposes set forth in the
                                Introductory Paragraph of this Agreement only)

                                By:  BLUM Capital Partners, L.P.,
                                     its general partner

                                         By: Richard C. Blum & Associates, Inc.,
                                             its general partner

                                         By:/s/Murray A. Indick
                                         Name:  Murray A. Indick
                                         Title: Partner, General Counsel and
                                                Secretary


                                THE COMMON FUND FOR NON-PROFIT
                                ORGANIZATIONS
                                (Signatory for the purposes set forth in the
                                Introductory Paragraph of this Agreement only)

                                By:  BLUM Capital Partners, L.P., its investment
                                     advisor

                                         By: Richard C. Blum & Associates, Inc.,
                                             its general partner

                                         By:/s/Murray A. Indick
                                         Name:  Murray A. Indick
                                         Title: Partner, General Counsel and
                                                Secretary

                                       28


                                THE UNION LABOR LIFE INSURANCE
                                COMPANY, acting for its SEPARATE ACCOUNT P
                                (Signatory for the purposes set forth in the
                                Introductory Paragraph of this Agreement only)

                                By:/s/Joseph Linehan
                                Name: Joseph Linehan
                                Title: VP, Securities

                                       29


                                                                     Exhibit 4.3

                               PERINI CORPORATION



                                       and



                       STATE STREET BANK AND TRUST COMPANY


                                 as Rights Agent




                              ____________________


                                  Amendment to

                          Shareholder Rights Agreement

                         Dated as of September 23, 1988

                             as amended and restated

                               as of May 17, 1990

                         as further amended and restated

                             as of January 17, 1997

                     and amended hereby as of March 29, 2000



     THIS AMENDMENT to Shareholder  Rights Agreement,  dated as of September 23,
1988,  as amended  and  restated  as of May 17,  1990,  as further  amended  and
restated as of January 17, 1997, and amended hereby as of March 29, 2000 between
Perini  Corporation,  a Massachusetts  corporation  (the  "Company"),  and State
Street Bank and Trust  Company  (the  "Rights  Agent").  Capitalized  terms used
herein and not defined  herein shall have the meanings  given them in the Rights
Agreement.

                               W I T N E S S E T H

     WHEREAS,   as  a  condition  to  the   consummation  of  the   transactions
contemplated by the Securities  Purchase Agreement dated February 5, 2000 by and
among the  Company,  Tutor-Saliba  Corporation  ("Tutor-Saliba"),  a  California
corporation,  O & G Industries Inc. ("O&G"), a Connecticut corporation,  and the
National  Union  Fire  Insurance  Company  of  Pittsburgh,  PA  ("National"),  a
[Pennsylvania corporation],Tutor-Saliba, O&G and National have required that the
Company amend the Shareholder  Rights  Agreement dated as of September 23, 1988,
as amended and  restated  as of May 17,  1990,  as amended as of July 24,  1996,
November 4, 1996 and December  13, 1996,  and amended and restated as of January
17,  1997  (the  Rights  Agreement),  to exempt  the  proposed  investment  by
Tutor-Saliba, O&G and National from the provisions of the Rights Agreement; and

     WHEREAS, in accordance with the terms of the Rights Agreement,  the Company
deems it advisable and in the best interests of its shareholders to make certain
further amendments to the Rights Agreement.

     NOW, THEREFORE,  in consideration of the premises and the mutual agreements
herein set forth,  the parties hereby agree that the Rights  Agreement is hereby
amended as follows:

1.   That the words ", a  Massachusetts  trust  company" be  inserted  after the
     words "State  Street Bank and Trust  Company" in the preamble of the Rights
     Agreement.

2.   That the last sentence in the  definition of "Acquiring  Person" in Section
     1(a) of the Rights Agreement be deleted and replaced with the following two
     sentences:

     "Notwithstanding anything in this Agreement to the contrary, solely for the
     purpose of determining  whether PB Capital  Partners,  The Union Labor Life
     Insurance Company ("ULLICO"),  The Common Fund for Non-Profit Organizations
     ("The Common Fund"),  RCBA, Ronald N. Tutor ("Tutor"),  Tutor-Saliba or any
     of their respective  Affiliates or Associates is an Acquiring Person,  none
     of such  persons  shall be deemed  to  beneficially  own (i) any  shares of
     Series B Cumulative  Convertible  Preferred  Stock (the "Series B Preferred
     Stock") of the Company  issued or issuable  pursuant to the Stock  Purchase
     and Sale Agreement,  including shares issued or issuable as payment-in-kind
     dividends,  (ii) any shares of the Common Stock issued or issuable upon the
     conversion  or exchange of such shares of Series B Preferred  Stock,  (iii)
     any shares of Common Stock issued or issuable pursuant to the Participation
     Agreement  by and between the Company and PB

                                       2


     Capital Partners dated as of November 4, 1996, or (iv) any shares of Common
     Stock issued or issuable to Tutor upon  exercise of a certain  stock option
     granted to Tutor on January  17,  1997.  Notwithstanding  anything  in this
     Agreement to the contrary,  solely for the purpose of  determining  whether
     Tutor-Saliba,  O&G,  National  or any of  their  respective  Affiliates  or
     Associates is an Acquiring Person,  none of such persons shall be deemed to
     beneficially  own (i) any shares of Common  Stock of the Company  issued or
     issuable pursuant to the Securities  Purchase  Agreement or (ii) any shares
     of Common  Stock  issued or  issuable  to Tutor upon  exercise of a certain
     stock option granted to Tutor on March 29, 2000."

3.   That the last  sentence in the  definition  of "Adverse  Person" in Section
     1(b) of the Rights  Agreement  be deleted and replaced  with the  following
     sentence:

     "Notwithstanding  anything in this Agreement to the contrary,  the Board of
     Directors may not declare any of the following  entities an Adverse Person:
     PB Capital Partners,  ULLICO,  The Common Fund, RCBA, Tutor,  Tutor-Saliba,
     O&G, National and their respective Affiliates."

4.   That the last  sentence in the  definition of "Stock  Acquisition  Date" in
     Section  1(s) of the Rights  Agreement  be deleted  and  replaced  with the
     following two sentences:

     "Notwithstanding anything in this Agreement to the contrary, solely for the
     purpose of determining  whether a Stock  Acquisition Date has occurred,  PB
     Capital Partners,  ULLICO,  The Common Fund, RCBA, Tutor,  Tutor-Saliba and
     their  respective  Affiliates  and  Associates,  shall  be  deemed  not  to
     beneficially  own (i) any shares of Series B Preferred Stock of the Company
     issued or  issuable  pursuant  to the Stock  Purchase  and Sale  Agreement,
     including shares issued as  payment-in-kind  dividends,  (ii) any shares of
     the Common Stock issued or issuable upon the conversion or exchange of such
     shares of Series B Preferred Stock, (iii) any shares of Common Stock issued
     or issuable  pursuant  to the  Participation  Agreement  by and between the
     Company and PB Capital  Partners  dated as of November 4, 1996, or (iv) any
     shares of Common  Stock  issued or  issuable  to Tutor upon  exercise  of a
     certain stock option granted to Tutor on January 17, 1997.  Notwithstanding
     anything  in this  Agreement  to the  contrary,  solely for the  purpose of
     determining  whether  a  Stock  Acquisition  Date  has  occurred,  none  of
     Tutor-Saliba,  O&G,  National  or any of  their  respective  Affiliates  or
     Associates  shall be deemed to  beneficially  own (i) any  shares of Common
     Stock of the Company issued or issuable pursuant to the Securities Purchase
     Agreement  or (ii) any shares of Common  Stock  issued or issuable to Tutor
     upon  exercise  of a certain  stock  option  granted  to Tutor on March 29,
     2000."

5.   That the following  language be inserted at the end of the second  sentence
     of Section 2 of the Rights  Agreement:  ", upon ten (10) days prior written
     notice  to the  Rights  Agent.  The  Rights  Agent  shall  have  no duty to
     supervise,  and shall in no event be liable for,  the acts or  omissions or
     any such co-Rights Agent."

                                       3


6.   That the word  "gross" be inserted  prior to the word  "negligence"  in the
     second  sentence  of  Section  18(a)  and in  Section  20(c) of the  Rights
     Agreement.

7.   That the  address  for  notices  to the  Rights  Agent in Section 26 of the
     Rights Agreement be changed to

                  "State Street Bank and Trust Company
                  c/o EquiServe Limited Partnership
                  150 Royall Street
                  Canton, Massachusetts  02021
                  Attention:  Client Administration"


8.   That the remaining  provisions of the Rights Agreement remain in full force
     and effect.

                                       4


     IN WITNESS  WHEREOF,  the parties  hereto have caused this  Agreement to be
duly executed and their respective  corporate seals to be hereunto affixed,  all
as of the day and year first above written.



                              PERINI CORPORATION

                              By:/s/Robert Band
                              Name:  Robert Band
                              Title: President





                              STATE STREET BANK AND TRUST
                              COMPANY, as Rights Agent


                              By:/s/Charles Rossi
                              Name:  Charles Rossi
                              Title: Vice President

                                       5

                                                                     Exhibit 4.4



                         TERMINATION/AMENDMENT AGREEMENT

     This Termination/Amendment Agreement (the "Agreement") is entered into this
29th day of March  2000,  by and among PB  Capital  Partners,  L.P.,  a Delaware
limited partnership ("PB"), The Common Fund for Non-Profit Organizations,  a New
York non-profit  organization ("The Common Fund"),  BLUM Capital Partners,  L.P.
(f/k/a  Richard C. Blum & Associates,  L.P.), a California  limited  partnership
("Blum"), The Union Labor Life Insurance Company, a Maryland corporation, acting
for its  Separate  Account P ("Union  Labor  Life")  and Perini  Corporation,  a
Massachusetts corporation (the "Company").

     WHEREAS,  Blum,  PB and the  Company  are  parties  to that  certain  Stock
Purchase and Sale Agreement dated July 24, 1996,  together with all exhibits and
schedules  thereto and all amendments and  modifications  thereof  (collectively
referred to as the "Stock Purchase  Agreement"),  pursuant to which PB agreed to
purchase  150,150  shares  of  newly  issued  Series  B  Cumulative  Convertible
Preferred Stock, par value $1.00 per share (the "Series B Preferred Stock"),  of
Seller for $30,030,000; and

     WHEREAS,  PB, the Company and Union Labor Life are parties to that  certain
Stock Assignment and Assumption Agreement dated as of December 13, 1996 pursuant
to which Union Labor Life acquired the rights and obligations to purchase 34,500
shares of Series B Preferred Stock under the Stock Purchase Agreement; and

     WHEREAS,  PB, the Company  and The Common Fund are parties to that  certain
Assignment  and  Assumption  Agreement  dated as of January 17, 1997 pursuant to
which The Common Fund  acquired the rights and  obligations  to purchase  23,300
shares of Series B Preferred Stock under the Stock Purchase Agreement; and

     WHEREAS,  the Company has entered  into that  certain  Securities  Purchase
Agreement  (the "SPA")  dated as of  February 5, 2000 by and among  Tutor-Saliba
Corporation,  a California  corporation,  O&G  Industries,  Inc., a  Connecticut
corporation, and the National Union Fire Insurance Company of Pittsburgh, Pa., a
Pennsylvania corporation (collectively, the "Purchasers"), pursuant to which the
Purchasers  have agreed to purchase an aggregate  of  9,411,765  shares of newly
issued common stock of the Company ("Common Stock"); and

     WHEREAS,  in  connection  with the SPA, the Company and each of Union Labor
Life, The Common Fund and PB have entered into separate Exchange Agreements (the
"Exchange  Agreements")  pursuant to which each of Union Labor Life,  The Common
Fund and PB have agreed to exchange their shares of Series B Preferred Stock for
shares of Common Stock of the Company,  to amend certain provisions of the Stock
Purchase  Agreement  and to terminate the  Registration  Rights  Agreement  (the
"Registration  Rights  Agreement") which was entered into in connection with the
transactions contemplated by the Stock Purchase Agreement.


     NOW,  THEREFORE,  in  consideration  of the premises and of the  respective
representations,  warranties,  covenants,  agreements and  conditions  contained
herein and other good and valuable  consideration the receipt and sufficiency of
which is hereby acknowledged, each of the parties agrees as follows:

1.   Upon  consummation  of  the  transactions   contemplated  by  the  Exchange
     Agreements  and the SPA,  the parties  hereto  agree that the  Registration
     Rights  Agreement  shall  terminate and have no further  effect without any
     further action by any of the parties hereto.

2.   Upon  consummation  of  the  transactions   contemplated  by  the  Exchange
     Agreements  and the SPA, the parties  hereto agree that the Stock  Purchase
     Agreement  shall be amended as follows  without any  further  action by the
     parties hereto:

     a.   Section 7.2 of the Stock  Purchase  Agreement  shall be deleted in its
          entirety;

     b.   Section 7.3 of the Stock  Purchase  Agreement  shall be deleted in its
          entirety; and

     c.   Section 7.20 of the Stock Purchase  Agreement  shall be deleted in its
          entirety.

                                       2



     IN WITNESS WHEREOF, each party hereto have caused this Agreement to be duly
executed by himself or its authorized officer as of the day and year first above
written.



                          PERINI CORPORATION

                          By:/s/Robert Band
                          Name:  Robert Band
                          Title: President



                          BLUM CAPITAL PARTNERS, L.P.

                          By:  Richard C. Blum & Associates, Inc.,
                               its general partner

                          By:/s/Murray Indick
                          Name:  Murray Indick
                          Title: Partner, General Counsel and Secretary



                          PB CAPITAL PARTNERS, L.P.

                          By:  BLUM Capital Partners, L.P., its general partner

                          By:      Richard C. Blum & Associates, Inc.,
                                   its general partner

                          By:/s/Murray Indick
                          Name:  Murray Indick
                          Title: Partner, General Counsel and Secretary

                                       3


                          THE COMMON FUND FOR NON-PROFIT
                          ORGANIZATIONS

                          By:BLUM Capital Partners, L.P., its investment advisor

                          By:  Richard C. Blum & Associates, Inc.,
                               its general partner

                          By:/s/Murray Indick
                          Name:  Murray Indick
                          Title: Partner, General Counsel and Secretary


                          THE UNION LABOR LIFE INSURANCE
                          COMPANY, acting for its SEPARATE ACCOUNT P

                          By:/s/Joseph Linehan
                          Name:  Joseph Linehan
                          Title: Vice President, Securities

                                       4