Document:

<PAGE>
                                                                   Exhibit 10.26

             JOINDER AND AMENDMENT TO SECURITIES PURCHASE AGREEMENT

         THIS JOINDER AND AMENDMENT TO SECURITIES PURCHASE AGREEMENT (this
"Joinder and Amendment Agreement") is made as of this 18th day of August, 2001
by and among Bentley Systems, Incorporated, a Delaware corporation (the
"Company"), Gabriel Norona, Francisco Norona, Richard D. Bowman, Andrew
Panayotoff, Orestes Norat and Robert Cormack (collectively, the "Purchasers"),
and for purposes of consenting to the amendment set forth herein, Gregory S.
Bentley, Keith A. Bentley, Barry J. Bentley, Cristobal Conde, David Ehret,
Robert Greifeld, Malcolm S. Walter and Argosy Investment Partners II, L.P. All
initially capitalized terms used but not otherwise defined in this Joinder and
Amendment Agreement shall have the meanings given to such terms in the
Securities Purchase Agreement (as such term is hereinafter defined).

                                   BACKGROUND

         1. On December 26, 2000, the Company entered into the Securities
Purchase Agreement (the "Securities Purchase Agreement") with the several
purchasers named in Schedule I attached thereto (the "Initial Purchasers") and
Raymond B. Bentley and Richard P. Bentley for certain limited purposes specified
therein, with respect to the Company's sale and the Initial Purchasers' purchase
of an aggregate 75,000 shares of the Senior Class C Common Stock of the Company
(the "Class C Shares") and Common Stock Purchase Warrants to purchase up to an
aggregate 1,040,000 shares of Class B Non-Voting Common Stock of the Company
("Class B Shares"). The aggregate price of the Class C Shares and warrants so
purchased and sold was $7.5 million.

         2. Pursuant to Section 1.2(c) of the Securities Purchase Agreement, the
Company had the right and option to sell up to an aggregate 75,000 additional
Class C Shares and Common Stock Purchase Warrants to purchase up to an aggregate
1,040,000 additional Class B Shares in one or more closings on or prior to June
30, 2001.

         3. On July 2, 2001 (a) the Securities Purchase Agreement was amended
("SPA Amendment No. 1") to extend the date for the closing of the sale of
additional Class C Shares and Common Stock Purchase Warrants to on or prior to
September 30, 2001 and (b) Argosy Investment Partners II, L.P. and Malcolm S.
Walter (the "Second Round Purchasers") joined in the Securities Purchase
Agreement in connection with their purchase of an aggregate 26,000 Class C
Shares and Common Stock Purchase Warrants to purchase up to an aggregate
360,533.3 Class B Shares. The aggregate price of the Class C Shares and warrants
so purchased and sold was $2.6 million.

         4. The Company and the Purchasers desire to sell and purchase,
respectively, an aggregate 35,000 Class C Shares and Common Stock Purchase
Warrants to purchase 485,333 Class B Shares on the date hereof. Such sale and
purchase shall be an Additional Closing under the Securities Purchase Agreement.
In order to effect such transaction, the Purchasers desire to join in the
Securities Purchase Agreement in accordance with Section 1.2(c) thereof.

                                      -1-
<PAGE>

         5. The Company also desires hereby to further amend the Securities
Purchase Agreement to re-define the stockholders who shall, pursuant to Section
6.6 of the Securities Purchase Agreement, be excluded from voting with respect
to certain cash compensation that may be paid by the Company to the Bentleys. In
accordance with Section 6.14 of the Securities Purchase Agreement, all parties
thereto must consent in writing to an amendment to such Section 6.6.

                  NOW THEREFORE, in consideration of the promises and the
agreements contained herein, the parties hereto, intending to be legally bound,
hereby agree as follows:

         1.1 Joinder. In connection with the purchase by him of the number of
Class C Shares and Common Stock Purchase Warrants to purchase the number of
Class B Shares indicated on Schedule I attached hereto, each of the Purchasers
hereby acknowledges and agrees that, effective as of the date hereof, he shall
be added as a party to the Securities Purchase Agreement, as amended by SPA
Amendment No. 1 and as further amended by this Joinder and Amendment Agreement,
and shall be bound by all provisions of the Securities Purchase Agreement, as so
amended, to the same extent as each of the Initial Purchasers and the Second
Round Purchasers, except for Section 6.1 relating to payment of the Purchasers'
expenses by the Company. The payment of the Purchasers' expenses shall instead
be governed by Section 10.2 of the Agreement and Plan of Merger, dated as of the
date hereof, among the Company, GP Acquisition Sub, Inc. and the Purchasers.

         1.2 Disclosure Statement. Pursuant to Section 1.2(c) of the Securities
Purchase Agreement, the Company has provided the Purchasers with a Disclosure
Statement dated the date hereof and attached hereto as Exhibit A, which
Disclosure Statement shall serve as the Disclosure Statement related to the
Additional Closing to which this Joinder and Amendment Agreement relates.

         1.3 Financial Statements. The Company has delivered to the Purchasers
its audited balance sheet as of December 31, 2000 and the related audited
consolidated statements of income and cash flow for the twelve months ended
December 31, 2000 and its unaudited balance sheet as of June 30, 2001 (the
"Balance Sheet") and the related unaudited consolidated statements of income and
cash flow for the six months ended June 30, 2001. All such financial statements
have been prepared in accordance with generally accepted accounting principles
applied on a consistent basis throughout the periods indicated ("GAAP") and
fairly present the financial condition and operating results of the Company as
of and for the periods set forth therein in accordance with GAAP, consistently
applied, except that the Balance Sheet may not contain all footnotes required by
GAAP, and is subject to normal recurring year end adjustments. Except as set
forth in the Balance Sheet and the related notes thereto, the Company has no
material liabilities, contingent or otherwise, other than (a) current
liabilities (as defined by GAAP) incurred in the ordinary course of business
subsequent to June 30, 2001 and (b) obligations under contracts and commitments
incurred in the ordinary course of business that are not required: (i) under
GAAP to be reflected on the Balance Sheet, or (ii) to be disclosed pursuant to
Statement of Financial Accounting Standards No.5.

                                      -2-
<PAGE>

         1.4 Amendment.

                  (a) Section 6.6 of the Securities Purchase Agreement is hereby
amended by deleting "Bentleys" from each of the parenthetical clauses in such
Section 6.6 and replacing that term with "Insiders," so that each such
parenthetical clause reads as follows:

         "(which holders shall, for the purposes of such vote, not include the
         Insiders or holders controlled by the Insiders) . . ."

                  (b) Section 6.6 is hereby amended by adding the following as
the final sentence of such Section:

         "For purposes hereof, `Insiders' means the Bentleys together with (i)
         any persons who are employees of the Company or any of its subsidiaries
         on the date such person first acquires shares of Stock, (ii) any
         persons who acquire shares of Stock within thirty (30) days of becoming
         employees of the Company or any of its subsidiaries, and (iii) the
         immediate family members of any persons referred to in subclauses (i)
         or (ii)."

                  (c) Except as specifically amended hereby, all of the terms
and conditions of the Securities Purchase Agreement, as previously amended by
SPA Amendment No. 1, shall remain in full force and effect. All references to
the Securities Purchase Agreement in any other document or instrument shall be
deemed to mean such Securities Purchase Agreement as amended by SPA Amendment
No. 1 and this amendment. The parties hereto agree to be bound by the terms and
obligations of the Securities Purchase Agreement, as amended by SPA Amendment
No. 1 and this amendment, as though the terms and obligations of the Securities
Purchase Agreement were set forth herein.

         1.5 Counterparts. This Joinder and Amendment Agreement may be executed
in any number of counterparts, all of which taken together shall constitute one
and the same instrument, and any of the parties hereto may execute this Joinder
and Amendment Agreement by signing any such counterpart.

                            [signature page follows]

                                      -3-
<PAGE>
         IN WITNESS WHEREOF, the parties hereto, intending to be legally bound,
have caused this Joinder and Amendment Agreement to be executed as of the date
first above written.

                                    COMPANY:

                                    BENTLEY SYSTEMS, INCORPORATED

                                    By:      /s/ David G. Nation
                                       -----------------------------------------
                                       Name:    David G. Nation
                                       Title:   Senior Vice President

                                    PURCHASERS:

                                             /s/ Gabriel Norona
                                    --------------------------------------------
                                    Gabriel Norona

                                             /s/ Francisco Norona
                                    --------------------------------------------
                                    Francisco Norona

                                             /s/ Richard D. Bowman
                                    --------------------------------------------
                                    Richard D. Bowman

                                             /s/ Andrew Panayotoff
                                    --------------------------------------------
                                    Andrew Panayotoff

                                             /s/ Orestes Norat
                                    --------------------------------------------
                                    Orestes Norat

                                             /s/ Robert Cormack
                                    --------------------------------------------
                                    Robert Cormack

               [Signature Page 1 of 2 to Joinder and Amendment to
                         Securities Purchase Agreement]

                                      -4-
<PAGE>

         The undersigned, in accordance with Section 6.14 of the Securities
Purchase Agreement, hereby consent to the amendment to Section 6.6 of the
Securities Purchase Agreement set forth in this Joinder and Amendment Agreement
as of the date first above written.

                                   /s/ Gregory S. Bentley
                          --------------------------------------------
                          Gregory S. Bentley

                                   /s/ Keith A. Bentley
                          --------------------------------------------
                          Keith A. Bentley

                                   /s/ Barry J. Bentley
                          --------------------------------------------
                          Barry J. Bentley

                                   /s/ Cristobal Conde
                          --------------------------------------------
                          Cristobal Conde

                          --------------------------------------------
                          Robert Greifeld

                                   /s/ David Ehret
                          --------------------------------------------
                          David Ehret

                                   /s/ Malcolm S. Walter
                          --------------------------------------------
                          Malcolm S. Walter

                          ARGOSY INVESTMENT PARTNERS II, L.P.
                          By:  Argosy Associates II, L.P., its General Partner
                          By:  Argosy Associates II, Inc., its General Partner

                               By:    /s/ Kirk B. Griswold
                                   --------------------------------------------
                                   Name:  Kirk B. Griswold, Vice President

               [Signature Page 2 of 2 to Joinder and Amendment to
                         Securities Purchase Agreement]

                                      -5-
<PAGE>

                                   SCHEDULE I
                              TO JOINDER AGREEMENT

<TABLE>
<CAPTION>
                                                        Warrants to Purchase
                              Shares of Senior Class    Shares of Class B Non-
Purchaser                     C Common Stock            Voting Common Stock
<S>                           <C>                       <C>
Gabriel Norona                20,574                    285,293
Francisco Norona               3,835                     53,176
Richard D. Bowman              3,475                     48,181
Andrew Panayotoff              2,770                     38,416
Orestes Norat                  2,770                     38,416
Robert Cormack                 1,576                     21,851
</TABLE>

                                      -6-

<PAGE>

                                    EXHIBIT A
                              DISCLOSURE STATEMENT

                                      -7-
<PAGE>

                    JOINDER TO SECURITIES PURCHASE AGREEMENT

         THIS JOINDER TO SECURITIES PURCHASE AGREEMENT (this "Joinder
Agreement") is made as of this 18th day of September, 2001 by and among Bentley
Systems, Incorporated, a Delaware corporation (the "Company"), Gabriel Norona
and Francisco Norona (collectively, the "Purchasers"). All initially capitalized
terms used but not otherwise defined in this Joinder Agreement shall have the
meanings given to such terms in the Securities Purchase Agreement (as such term
is hereinafter defined).

                                   BACKGROUND

         1. On December 26, 2000, the Company entered into the Securities
Purchase Agreement (the "Securities Purchase Agreement") with the several
purchasers named in Schedule I attached thereto (the "Initial Purchasers") and
Raymond B. Bentley and Richard P. Bentley for certain limited purposes specified
therein, with respect to the Company's sale and the Initial Purchasers' purchase
of an aggregate 75,000 shares of the Senior Class C Common Stock of the Company
(the "Class C Shares") and Common Stock Purchase Warrants to purchase up to an
aggregate 1,040,000 shares of Class B Non-Voting Common Stock of the Company
("Class B Shares"). The aggregate price of the Class C Shares and warrants so
purchased and sold was $7.5 million.

         2. Pursuant to Section 1.2(c) of the Securities Purchase Agreement, the
Company had the right and option to sell up to an aggregate 75,000 additional
Class C Shares and Common Stock Purchase Warrants to purchase up to an aggregate
1,040,000 additional Class B Shares in one or more closings on or prior to June
30, 2001.

         3. On July 2, 2001 (a) the Securities Purchase Agreement was amended to
extend the date for the closing of the sale of additional Class C Shares and
Common Stock Purchase Warrants to on or prior to September 30, 2001 and (b)
Argosy Investment Partners II, L.P. and Malcolm S. Walter (the "Second Round
Purchasers") joined in the Securities Purchase Agreement in connection with
their purchase of an aggregate 26,000 Class C Shares and Common Stock Purchase
Warrants to purchase up to an aggregate 360,533.3 Class B Shares. The aggregate
price of the Class C Shares and warrants so purchased and sold was $2.6 million.

         4. On the date hereof (a) the Company is acquiring Geopak Corporation,
a Florida corporation ("Geopak"), through the merger of Geopak into a wholly
owned subsidiary of the Company (the "Merger"), (b) in partial consideration of
the Merger, the Company is issuing an aggregate 35,000 Class C Shares to the
stockholders of Geopak (the "Stockholders") including the Purchasers, and (c)
the Stockholders and the Company are entering into a Joinder and Amendment to
Securities Purchase Agreement with respect to such purchase and sale of the
35,000 Class C Shares.

         5. The Company and the Purchasers desire to sell and purchase,
respectively, an additional aggregate 5,000 Class C Shares on the date hereof.
Such sale and purchase shall be an

                                      -1-
<PAGE>

Additional Closing under the Securities Purchase Agreement. In order to effect
such transaction, the Purchasers desire to join in the Securities Purchase
Agreement in accordance with Section 1.2(c) thereof.

                  NOW THEREFORE, in consideration of the promises and the
agreements contained herein, the parties hereto, intending to be legally bound,
hereby agree as follows:

         1.1 Joinder. In connection with the purchase by him of the number of
Class C Shares indicated on Schedule I attached hereto, each of the Purchasers
hereby acknowledges and agrees that, effective as of the date hereof, he shall
be added as a party to the Securities Purchase Agreement, as amended through the
date hereof, and shall be bound by all provisions of the Securities Purchase
Agreement, as so amended, to the same extent as each of the Initial Purchasers,
the Second Round Purchasers and the Stockholders, except for Section 6.1
relating to payment of the Purchasers' expenses by the Company. The payment of
the Purchasers' expenses shall instead be governed by Section 10.2 of the
Agreement and Plan of Merger, dated as of the date hereof, among the Company, GP
Acquisition Sub, Inc. and the Stockholders.

         1.2 Disclosure Statement. Pursuant to Section 1.2(c) of the Securities
Purchase Agreement, the Company has provided the Purchasers with a Disclosure
Statement dated the date hereof and attached hereto as Exhibit A, which
Disclosure Statement shall serve as the Disclosure Statement related to the
Additional Closing to which this Joinder Agreement relates.

         1.3 Financial Statements. The Company has delivered to the Purchasers
its audited balance sheet as of December 31, 2000 and the related audited
consolidated statements of income and cash flow for the twelve months ended
December 31, 2000 and its unaudited balance sheet as of June 30, 2001 (the
"Balance Sheet") and the related unaudited consolidated statements of income and
cash flow for the six months ended June 30, 2001. All such financial statements
have been prepared in accordance with generally accepted accounting principles
applied on a consistent basis throughout the periods indicated ("GAAP") and
fairly present the financial condition and operating results of the Company as
of and for the periods set forth therein in accordance with GAAP, consistently
applied, except that the Balance Sheet may not contain all footnotes required by
GAAP, and is subject to normal recurring year end adjustments. Except as set
forth in the Balance Sheet and the related notes thereto, the Company has no
material liabilities, contingent or otherwise, other than (a) current
liabilities (as defined by GAAP) incurred in the ordinary course of business
subsequent to June 30, 2001 and (b) obligations under contracts and commitments
incurred in the ordinary course of business that are not required: (i) under
GAAP to be reflected on the Balance Sheet, or (ii) to be disclosed pursuant to
Statement of Financial Accounting Standards No.5.

         1.4 Counterparts. This Joinder Agreement may be executed in any number
of counterparts, all of which taken together shall constitute one and the same
instrument, and any of the parties hereto may execute this Joinder Agreement by
signing any such counterpart.

                                      -2-
<PAGE>

         IN WITNESS WHEREOF, the parties hereto, intending to be legally bound,
have caused this Joinder Agreement to be executed as of the date first above
written.

                                  COMPANY:

                                  BENTLEY SYSTEMS, INCORPORATED

                                  By:      /s/ David G. Nation
                                     -----------------------------------------
                                        Name:  David G. Nation
                                        Title:    Senior Vice President
                                  PURCHASERS:

                                           /s/ Gabriel Norona
                                  --------------------------------------------
                                  Gabriel Norona

                                          /s/ Francisco Norona
                                  --------------------------------------------
                                  Francisco Norona

       [Signature Page 1 of 1 to Joinder to Securities Purchase Agreement]

                                      -3-
<PAGE>

                                   SCHEDULE I
                              TO JOINDER AGREEMENT

<TABLE>
<CAPTION>
                              Shares of Senior Class
Purchaser                     C Common Stock            Purchase Price
<S>                           <C>                       <C>
Gabriel Norona                2,500                     $250,000
Francisco Norona              2,500                     $250,000
</TABLE>

                                      -4-<PAGE>

                                                                  Exhibit 10.27

                              AMENDED AND RESTATED

                  INFORMATION AND REGISTRATION RIGHTS AGREEMENT

         This Amended and Restated Information and Registration Rights Agreement
(the "Agreement") is made as of December 26, 2000, by and between Bentley
Systems, Incorporated, a Delaware corporation (the "Company"), Bachow Investment
Partners III, L.P., a Delaware limited partnership or any other entity as to
which any affiliate of Bachow & Associates, Inc. is the general partner (the
"Initial Stockholder"), the financial institutions party to the Revolving Credit
Agreement (as defined below) (the "Lenders"), PNC Bank, National Association as
agent for the Lenders (the "Agent") and the persons listed as Senior Common
Stock Purchasers on the attached Schedule 1, as such schedule may be updated to
include additional persons participating in Closings (as defined below) (each a
"Purchaser" and collectively, the "Purchasers").

                                    RECITALS

                  a. The Company and the Initial Stockholder entered into an
Information and Registration Rights Agreement dated as of September 18, 1998
(the "Original Agreement").

                  b. The Company and the Initial Stockholder desire for the
Purchasers to purchase shares (the "Purchaser Shares") of the Company's Senior
Class C Common Stock, par value $0.01 per share (the "Senior Common Stock"), and
Common Stock Purchase Warrants (the "Warrants") to purchase shares of the
Company's Class B Non-Voting Common Stock, par value $0.01 per share, pursuant
to a Securities Purchase Agreement (the "Securities Purchase Agreement") of even
date by and between the Company and each Purchaser at separate closings to occur
on or before March 31, 2001 (each a "Closing" and collectively, the "Closing").

                  c. The Company and the Initial Stockholder desire for the
Lenders to acquire Warrants to purchase shares of the Company's Class B
Non-Voting Common Stock, par value $0.01 per share, pursuant to a Revolving
Credit and Security Agreement (the "Revolving Credit Agreement") of even date by
and between the Company, Bentley Software, Inc., a Delaware corporation,
Atlantech Solutions, Inc., a Delaware corporation, the Lenders and the Agent.

                  d. It is a condition precedent to the agreement of each
Purchaser to purchase the Purchaser Shares that the parties hereto amend and
restate the Original Agreement.

                  e. The Company, the Initial Stockholder, the Lenders and the
Purchasers desire to enter into this Agreement and to grant the rights contained
herein in order to fulfill such condition.

                  f. The parties hereto desire to enter into this Agreement and
to amend and restate the Original Agreement in the manner set forth herein.
<PAGE>
                  NOW, THEREFORE, in consideration of the above and of the
mutual promises set forth herein, the parties hereto agree that: (i) the Company
hereby grants to the Initial Stockholder and the Purchasers the information and
registration rights set forth below; and (ii) the Company, the Initial
Stockholder and the Purchasers, intending to be legally bound, hereby agree as
follows:

1. Certain Definitions. As used in this Agreement, the following terms shall
have the following respective meanings:

                  (a) "Commission" shall mean the Securities and Exchange
Commission or any other federal agency at the time administering the Securities
Act.

                  (b) "Common Stock" shall mean the shares of any current or
future class or series of the Company's common stock.

                  (c) "Convertible Securities" shall mean securities of the
Company convertible into or exchangeable for Registrable Securities.

                  (d) "Form S-3" shall mean Form S-3 issued by the Commission or
any substantially similar form then in effect.

                  (e) "Holder" shall mean any holder of outstanding Registrable
Securities which have not been sold to the public or Convertible Securities, but
only if such holder is the Initial Stockholder, a Lender or a Purchaser or is an
assignee or transferee of Registration rights as permitted by Section 9.

                  (f) "Initiating Holders" shall mean (i) with respect to a
Holder of the Series A Convertible Preferred Stock, par value $0.01 per share
(the "Series A Preferred Stock"), of the Company or a Holder of Common Stock
issued upon conversion of Series A Preferred Stock, any Holder or Holders who in
the aggregate hold at least fifty percent (50%) of the Common Stock issued or
issuable upon conversion of Series A Preferred Stock and (ii) with respect to a
Holder of the Senior Common Stock or a Holder of Common Stock issued upon the
conversion of Senior Common Stock, any Holder or Holders who in the aggregate
are Required Holders.

                  (g) "Material Adverse Event" shall mean an occurrence having a
consequence that either (a) is materially adverse as to the business,
properties, prospects or financial condition of the Company and its
Subsidiaries, taken as a whole or (b) is reasonably foreseeable, has a
reasonable likelihood of occurring, and if it were to occur would materially
adversely affect the business, properties, prospects or financial condition of
the Company and its Subsidiaries, taken as a whole.

                  (h) The terms "Register," "Register," "Registered" and
"Registration" refer to a registration effected by preparing and filing with the
Commission a registration statement in compliance with the Securities Act
("Registration Statement"), and the declaration or ordering of the effectiveness
of such Registration Statement by the Commission or pursuant to Section 8 of the
Securities Act.

                                      -2-
<PAGE>
                  (i) "Registrable Securities" shall mean all Common Stock
currently held or subsequently acquired by the Holders or issuable upon
conversion or exercise of any of the Company's Convertible Securities purchased
by or issued to the Holders, including Common Stock issued pursuant to stock
splits, stock dividends and similar distributions, and any securities of the
Company granted Registration rights pursuant to Section 8 of this Agreement;
provided, however, the Registrable Securities shall not include any shares of
Common Stock (i) which are then already registered, (ii) which have been sold to
the public either pursuant to a registration under the Securities Act or Rule
144, promulgated by the Commission under the Securities Act, or (iii) so long as
the Common Stock is listed on the New York Stock Exchange, the American Stock
Exchange or the NASDAQ National Market, which can be sold pursuant to Rule 144
under the Securities Act without limitation as to volume; and provided further,
however, that the Registrable Securities shall not include any Common Stock
acquired or Convertible Securities purchased after the date hereof by Gregory S.
Bentley, Keith A. Bentley, Barry J. Bentley, Raymond P. Bentley and Richard P.
Bentley other than pursuant to the Securities Purchase Agreement.

                  (j) "Registration Expenses" shall mean all expenses incurred
by the Company in complying with Sections 2 or 3 of this Agreement, including,
without limitation, all federal and state registration, qualification and filing
fees, printing expenses, fees and disbursements of counsel for the Company and
one special counsel for Holders (if different from counsel for the Company),
blue sky fees and expenses, and accounting fees and expenses, but excluding
Selling Expenses.

                  (k) "Required Holders" shall mean the Holders of a majority of
the shares of the Common Stock issued or issuable upon conversion of the Senior
Common Stock; provided, however, that such majority shall include at least one
of Cristobal Conde, David Ehret and Robert Greifeld.

                  (l) "Securities Act" shall mean the Securities Act of 1933, as
amended, or any similar federal statute, and the rules and regulations of the
Commission thereunder, all as the same shall be in effect at the time.

                  (m) "Selling Expenses" shall mean all underwriting discounts,
selling commissions and stock transfer taxes applicable to the sale of
Registrable Securities pursuant to this Agreement.

2.       Demand Registration.

         2.1 Request for Registration. Subject to the terms of this Agreement,
in the event that the Company shall receive from Initiating Holders at any time
after 180 days after the effectiveness of the Registration Statement relating to
the Company's initial public offering of securities pursuant to a Registration
(the "IPO"), a written request that the Company effect any Registration with
respect to all or a part of the Registrable Securities if the reasonably
anticipated aggregate offering price thereof to the public would exceed
$5,000,000, the Company shall (i) promptly give written notice of the proposed
Registration to all other Holders and (ii) as soon as practicable, use its best
efforts to effect Registration of the Registrable Securities specified in such
request, together with any Registrable Securities of any Holder joining in such
request as

                                      -3-
<PAGE>
are specified in a written request given within 20 days after written notice
from the Company. The Company shall not be obligated to take any action to
effect any such Registration pursuant to this Section 2.1 within six months of
the effective date of a Registration initiated by the Company. With respect to
Initiating Holders who are Holders of Series A Preferred Stock or of Common
Stock issued upon conversion of Series A Preferred Stock, the Company shall be
obligated to effect only one Registration pursuant to this Section 2.1; provided
that it shall be obligated to effect a second Registration if 600,000 shares of
Common Stock are released to the Initial Stockholder pursuant to the Escrow
Agreement (as defined in the Stock Purchase Agreement (the "Stock Purchase
Agreement") dated September 18, 1998 among, inter alia the Company and the
Initial Stockholder); provided further that the Company shall not be obligated
to effect any Registration if the written request therefor is received by the
Company more than four years after the closing of the IPO. With respect to
Initiating Holders who are Holders of Senior Common Stock or of Common Stock
issued upon conversion of Senior Common Stock, the Company shall be required to
effect only two Registrations pursuant to this Section 2.1; provided that the
Company shall not be obligated to effect any Registration if the written request
therefor is received by the Company more than four years after the closing of
the IPO.

         2.2 Right of Deferral of Registration. If the Company shall furnish to
all Holders who joined in a request for Registration pursuant to Section 2.1 a
certificate signed by the President of the Company stating that, in the good
faith judgment of the Board of Directors of the Company, if the Registration
were effected as requested under Section 2.1; disclosure would be required that
would not be in the best interests of the Company, the Company shall have the
right, exercisable one time per Registration only, to defer such request with
respect to such offering for a period of not more than 90 days from delivery of
the request of the Initiating Holders.

         2.3 Registration of Other Securities in Demand Registration. Any
Registration Statement filed pursuant to the request of the Initiating Holders
under this Section 2 may, subject to the provisions of Section 2.5, at the
Company's option, include securities of the Company other than Registrable
Securities.

         2.4 Underwriting in Demand Registration.

                  2.4.1 Notice of Underwriting. If the Initiating Holders intend
to distribute the Registrable Securities covered by their request by means of an
underwriting, they shall so advise the Company as a part of their request made
pursuant to this Section 2, and the Company shall include such information in
the written notice referred to in Section 2.1. The rights of any Holder or other
person to Registration pursuant to Section 2 shall be conditioned upon such
person's agreement to participate in such underwriting.

                  2.4.2 Inclusion of Other Holders in Demand Registration. If
the Company, officers or directors of the Company holding Common Stock other
than Registrable Securities or holders of securities other than Registrable
Securities, request inclusion in any Registration pursuant to Section 2.1, to
the extent the Company agrees, the Initiating Holders shall permit the Company,
such officers or directors and such holders of securities other than Registrable
Securities to be included in the underwriting, subject to the acceptance by such
persons of the terms of this Section 2, including Section 2.4.4 hereof.

                                      -4-
<PAGE>
                  2.4.3 Selection of Underwriter in Demand Registration. The
Company shall (together with all Holders proposing to distribute their
securities through such underwriting) enter into an underwriting agreement with
the representative ("Underwriter's Representative") of the underwriter or
underwriters selected for such underwriting pursuant to Section 2.4.1 by the
Holders of a majority of the Registrable Securities being Registered by the
Initiating Holders and agreed to by the Company in its reasonable business
judgment.

                  2.4.4 Marketing Limitation in Demand Registration. (a) In the
event the Initiating Holders are Holders of the Series A Preferred Stock or of
Common Stock issued upon conversion of Series A Preferred Stock and the
Underwriter's Representative advises such Initiating Holders in writing that
market factors (including, without limitation, the aggregate number of shares of
Common Stock requested to be Registered, the general condition of the market,
and the status of the persons proposing to sell securities pursuant to the
Registration) require a limitation of the number of shares to be underwritten
pursuant to Section 2.4.1., then (i) first the Common Stock (other than
Registrable Securities) held by officers or directors of the Company excluding
the Senior Common Stock or Common Stock issued upon Conversion of Senior Common
Stock held by Gregory S. Bentley, Keith A. Bentley and Barry J. Bentley, (ii)
next the securities other than Registrable Securities, (iii) next the securities
requested to be Registered by the Company and (iv) last the Registrable
Securities of Holders of other than Series A Preferred Stock or Common Stock
issued upon conversion of Series A Preferred Stock, shall be excluded from such
Registration to the extent required by such limitation. If a limitation of the
number of shares is still required, the Initiating Holders shall so advise all
Holders and the number of shares of Registrable Securities that may be included
in the Registration and underwriting shall be allocated among all Holders of
Series A Preferred Stock or Common Stock issued upon conversion of Series A
Preferred Stock in proportion, as nearly as practicable, to the respective
amounts of Registrable Securities entitled to inclusion in such Registration
held by such Holders at the time of filing the Registration Statement. No
Registrable Securities or other securities excluded from the underwriting by
reason of this Section 2.4.4 (a) shall be included in such Registration
Statement.

                  (b) In the event the Initiating Holders are Holders of the
Senior Common Stock or of Common Stock issued upon conversion of Senior Common
Stock and the Underwriter's Representative advises such Initiating Holders in
writing that market factors (including, without limitation, the aggregate number
of shares of Common Stock requested to be Registered, the general condition of
the market, and the status of the persons proposing to sell securities pursuant
to the Registration) require a limitation of the number of shares to be
underwritten pursuant to Section 2.4.1, then (i) first the Common Stock (other
than Registrable Securities) held by officers or directors of the Company
excluding the Senior Common Stock or Common Stock issued upon conversion of
Senior Common Stock held by Gregory S. Bentley, Keith A. Bentley, and Barry J.
Bentley, (ii) next the securities other than Registrable Securities, (iii) next
the securities requested to be Registered by the Company and (iv) last the
Registrable Securities of Holders of other than Senior Common Stock or other
Common Stock issued upon conversion of Senior Common Stock, shall be excluded
from such Registration to the extent required by such limitation. If a
limitation of the number of shares is still required, the Initiating Holders
shall so advise all Holders and the number of shares of Registrable Securities
that may be included in the Registration and underwriting shall be allocated
among

                                      -5-
<PAGE>
all Holders of Senior Common Stock or Common Stock issued upon conversion of
Senior Common Stock in proportion, as nearly as practicable, to the respective
amounts of Registrable Securities entitled to inclusion in such Registration
held by such Holders at the time of filing the Registration Statement. No
Registrable Securities or other securities excluded from the underwriting by
reason of this Section 2.4.4(b) shall be included in such Registration
Statement.

                  2.4.5 Right of Withdrawal in Demand Registration. If any
Holder of Registrable Securities, or a holder of other securities entitled (upon
request) to be included in such Registration, disapproves of the terms of the
underwriting, such person may elect to withdraw therefrom by written notice to
the Company, the underwriter and the Initiating Holders delivered at least seven
days prior to the effective date of the Registration Statement. The securities
so withdrawn shall also be withdrawn from the Registration Statement.

         2.5 Blue Sky in Demand Registration. In the event of any Registration
pursuant to Section 2, the Company will exercise its best efforts to Register
and qualify the securities covered by the Registration Statement under such
other securities or Blue Sky laws of such jurisdictions as shall be reasonably
appropriate for the distribution of such securities; provided, however, that (i)
the Company shall not be required to qualify to do business or to file a general
consent to service of process in any such states or jurisdictions, and (ii)
notwithstanding anything in this Agreement to the contrary, in the event any
jurisdiction in which the securities shall be qualified imposes a non-waivable
requirement that expenses incurred in connection with the qualification of the
securities be borne by selling shareholders, such expenses shall be payable pro
rata by selling shareholders (but only to the extent so required).

3.       Piggyback Registration.

         3.1 Notice of Piggyback Registration and Inclusion of Registrable
Securities. Subject to the terms of this Agreement, in the event the Company
decides (other than pursuant to Section 2 of this Agreement) to Register for
sale to the public generally, at any time subsequent to the Company's IPO, any
of its Common Stock (either for its own account or the account of a security
holder or holders exercising their respective demand Registration rights) on a
form that would be suitable for a Registration involving solely Registrable
Securities, the Company will: (i) promptly give each Holder written notice
thereof (which shall include a list of the jurisdictions in which the Company
intends to attempt to qualify such securities under the applicable Blue Sky or
other state securities laws) and (ii) include in such Registration (and any
related qualification under Blue Sky laws or other compliance), and in any
underwriting involved therein, all the Registrable Securities specified in a
written request delivered to the Company by any Holder within 15 days after
delivery of such written notice from the Company.

         3.2 Underwriting in Piggyback Registration.

                  3.2.1 Notice of Underwriting in Piggyback Registration. If the
Registration of which the Company gives notice pursuant to Section 3.1 is for a
Registered public offering involving an underwriting, the Company shall so
advise the Holders as a part of the written notice given pursuant to Section
3.1. In such event the right of any Holder to Registration shall be conditioned
upon such underwriting and the inclusion of such Holder's Registrable Securities

                                      -6-
<PAGE>
in such underwriting to the extent provided in this Section 3. All Holders
proposing to distribute their securities through such underwriting shall
(together with the Company and the other holders distributing their securities
through such underwriting) enter into an underwriting agreement with the
Underwriter's Representative for such offering. The Holders shall have no right
to participate in the selection of the underwriters for an offering pursuant to
this Section 3.

                  3.2.2 Marketing Limitation in Piggyback Registration. In the
event the Underwriter's Representative advises the Holders seeking Registration
of Registrable Securities pursuant to Section 3 in writing that market factors
(including, without limitation, the aggregate number of shares of Common Stock
requested to be Registered, the general condition of the market, and the status
of the persons proposing to sell securities pursuant to the Registration)
require a limitation of the number of shares to be underwritten, the
Underwriter's Representative (subject to the allocation priority set forth in
Section 3.2.3) may limit the number of, or eliminate, the shares of Registrable
Securities to be included in such Registration and underwriting.

                  3.2.3 Allocation of Shares in Piggyback Registration. In the
event that the Underwriter's Representative limits the number of shares to be
included in a Registration pursuant to Section 3.2.2, the number of shares to be
included in such Registration shall be allocated (subject to Section 3.2.2) in
the following manner: (i) first the shares (other than Registrable Securities)
held by officers or directors of the Company, excluding the Senior Common Stock
held by Gregory S. Bentley, Keith A. Bentley, and Barry J. Bentley, (ii) next
the securities other than Registrable Securities and (iii) last the Registrable
Securities of Holders of other than Series A Preferred Stock or Common Stock
issued upon conversion of Series A Preferred Stock, shall be excluded from such
Registration and underwriting to the extent required by such limitation. If a
limitation of the number of shares is still required after such exclusions, the
number of shares that may be included in the Registration and underwriting by
selling shareholders shall be allocated among all Holders of Series A Preferred
Stock or Common Stock issued upon conversion of Series A Preferred Stock in
proportion, as nearly as practicable, to the respective amounts of Registrable
Securities which would otherwise be entitled to inclusion in such Registration
held by such Holders at the time of filing the Registration Statement. No
Registrable Securities or other securities excluded from the underwriting by
reason of this Section 3.2.3 shall be included in the Registration Statement.

                  3.2.4 Withdrawal in Piggyback Registration. If any Holder
disapproves of the terms of any such underwriting, he may elect to withdraw
therefrom by written notice to the Company and the underwriter delivered at
least seven days prior to the effective date of the Registration Statement. Any
Registrable Securities or other securities excluded or withdrawn from such
underwriting shall be withdrawn from such Registration.

         3.3 Blue Sky in Piggyback Registration. In the event of any
Registration of Registrable Securities pursuant to Section 3, the Company will
exercise its best efforts to Register and qualify the securities covered by the
Registration Statement under such other securities or Blue Sky laws of such
jurisdictions as shall be reasonably appropriate for the distribution of such
securities; provided, however, that (i) the Company shall not be required to
qualify to do business or to file a general consent to service of process in any
such states or jurisdictions, and (ii) notwithstanding anything in this
Agreement to the contrary, in the event

                                      -7-
<PAGE>
any jurisdiction in which the securities shall be qualified imposes a
non-waivable requirement that expenses incurred in connection with the
qualification of the securities be borne by selling shareholders, such expenses
shall be payable pro rata by selling shareholders.

4. Expenses of Registration. All Registration Expenses incurred in connection
with any Registration pursuant to this Agreement shall be borne by the Company.
Notwithstanding the above, the Company shall not be required to pay for any
expenses of any Registration proceeding begun pursuant to Section 2 if the
Registration request is subsequently withdrawn at the request of the Holders of
a majority of the Registrable Securities to be Registered (which Holders shall
bear such expenses), unless the Holders of a majority of the Series A Preferred
Stock and/or the Holders of a majority of the Senior Common Stock, as
applicable, agree to forfeit their right to one demand Registration pursuant to
Section 2; provided further, however, that if at the time of such withdrawal,
the Holders have learned of a Material Adverse Event with respect to the
condition, business or prospects of the Company not known to the Holders at the
time of their request, then the Holders shall not be required to pay any of such
expenses and shall retain their rights pursuant to Section 2. All Selling
Expenses incurred in connection with any Registration shall be borne by the
Holders of the securities Registered pro rata on the basis of the number of
shares Registered.

5. Registration Procedures. The Company will keep each Holder whose Registrable
Securities are included in any Registration pursuant to this Agreement advised
as to the initiation and completion of such Registration. At its expense, the
Company will:

                  (a) prepare and file with the Commission a Registration
Statement with respect to such Registrable Securities and use its best efforts
to cause such Registration Statement to become effective, and, upon the request
of the Holders of a majority of the Registrable Securities Registered
thereunder, keep such Registration Statement effective for a period of up to 120
days or until the Holder or Holders have completed the distribution described in
the Registration Statement relating thereto, whichever first occurs;

                  (b) prepare and file with the Commission such amendments and
supplements to such Registration Statement and the prospectus used in connection
with such Registration Statement as may be necessary to comply with the
provisions of the Securities Act with respect to the disposition of all
securities covered by such Registration Statement;

                  (c) furnish to the Holders such numbers of copies of a
prospectus, including a preliminary prospectus, in conformity with the
requirements of the Securities Act, and such other documents as they may
reasonably request in order to facilitate the disposition of Registrable
Securities owned by them;

                  (d) use its best efforts to obtain clearance for such
Registration and sale of securities from the National Association of Securities
Dealers;

                  (e) promptly notify each Holder of Registrable Securities
covered by such Registration Statement, or the Holder's designated
attorney-in-fact, whenever a prospectus relating thereto covered by such
Registration Statement is required to be delivered under the Securities Act, of
the happening of any event as a result of which the prospectus included in such

                                      -8-
<PAGE>
Registration Statement, as then in effect, includes an untrue statement of a
material fact or omits to state a material fact required to be stated therein or
necessary to make the statements therein not misleading in the light of the
circumstances then existing; and

                  (f) furnish, at the request of any Holder requesting
Registration of Registrable Securities pursuant to this Agreement, on the date
that such Registrable Securities are delivered to the underwriters for sale in
connection with a Registration pursuant to this Agreement, if such securities
are being sold through underwriters, or if such securities are not being sold
through underwriters, on the date that the Registration Statement with respect
to such securities becomes effective (i) an opinion dated such date of the
counsel representing the Company for the purposes of such Registration, in such
form and substance as is reasonably and customarily given to underwriters in an
underwritten public offering, addressed to the underwriters, if any, and to the
Holders requesting Registration of Registrable Securities and (ii) a letter
dated such date from the independent certified public accountants of the
Company, in such form and substance as is reasonably and customarily given by
independent certified public accountants to underwriters in an underwritten
public offering, addressed to the underwriters, if any, and to the Holders
requesting Registration of Registrable Securities.

6. Information Furnished by Holder. It shall be a condition precedent of the
Company's obligations under this Agreement that each Holder of Registrable
Securities included in any Registration furnish to the Company such information
regarding such Holder and the distribution proposed by such Holder or Holders as
the Company may reasonably request.

7. Indemnification.

         7.1 Company's Indemnification of Holders. To the extent permitted by
law, the Company will indemnify each Holder, each of its officers, directors and
constituent partners, legal counsel for the Holders, and each person controlling
such Holder, with respect to which Registration, qualification or compliance of
Registrable Securities has been effected pursuant to this Agreement, and each
underwriter, if any, and each person who controls any underwriter against all
claims, losses, damages, liabilities or expenses (or actions in respect thereof)
to the extent such claims, losses, damages, liabilities or expenses arise out of
or are based upon any untrue statement (or alleged untrue statement) of a
material fact contained in any prospectus or other document (including any
related Registration Statement) incident to any such Registration, qualification
or compliance, or are based on 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, or any violation (or alleged violation) by
the Company of any rule or regulation promulgated under the Securities Act
applicable to the Company and relating to action or inaction required of the
Company in connection with any such Registration, qualification or compliance;
and the Company will reimburse each such Holder, each such underwriter and each
person who controls any such Holder or underwriter, for any legal and any other
expenses reasonably incurred in connection with investigating or defending any
such claim, loss, damage, liability, expense or action; provided, however, that
the indemnity contained in this Section 7.1 shall not apply to amounts paid in
settlement of any such claim, loss, damage, liability or action if settlement is
effected without the consent of the Company (which consent shall not
unreasonably be withheld); and provided, further, that the Company will not be
liable in any such case to the extent that any such claim, loss, damage,
liability or expense arises out of or is based

                                      -9-
<PAGE>
upon any untrue statement or omission based upon written information furnished
to the Company by such Holder, underwriter, or controlling person and stated to
be for use in connection with the offering of securities of the Company.

         7.2 Holder's Indemnification of Company. To the extent permitted by
law, each Holder will, if Registrable Securities held by such Holder are
included in the securities as to which such Registration, qualification or
compliance is being effected pursuant to this Agreement, indemnify the Company,
each of its directors and officers, each legal counsel and independent
accountant of the Company, each underwriter, if any, of the Company's securities
covered by such a Registration Statement, each person who controls the Company
or such underwriter within the meaning of the Securities Act, and each other
such Holder, each of its officers, directors and constituent partners and each
person controlling such other Holder, against all claims, losses, damages,
liabilities or expenses (or actions in respect thereof) arising out of or based
upon any untrue statement (or alleged untrue statement) of a material fact
contained in any such Registration Statement, prospectus, offering circular or
other document, 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, or any violation (or alleged violation) by such Holder
of any rule or regulation promulgated under the Securities Act applicable to
such Holder and relating to action or inaction required of such Holder in
connection with any such Registration, qualification or compliance; and will
reimburse the Company, such Holders, such directors, officers, partners,
persons, law and accounting firms, underwriters or control persons for any legal
and any other expenses reasonably incurred in connection with investigating or
defending any such claim, loss, damage, liability, expense or action, in each
case to the extent, but only to the extent, that such untrue statement (or
alleged untrue statement) or omission (or alleged omission) is made in such
Registration Statement, prospectus, offering circular or other document in
reliance upon and in conformity with written information furnished to the
Company by such Holder and stated to be specifically for use in connection with
the offering of securities of the Company, provided, however, that the indemnity
contained in this Section 7.2 shall not apply to amounts paid in settlement of
any such loss, claim, damage, liability or action if such settlement is effected
without the consent of the Holder (which consent shall not be unreasonably
withheld); and provided further that each Holder's liability under this Section
7.2 shall not exceed such Holder's proceeds from the offering of securities made
in connection with such Registration.

         7.3 Indemnification Procedure. Promptly after receipt by an indemnified
party under this Section 7 of notice of the commencement of any action, such
indemnified party will, if a claim in respect thereof is to be made against an
indemnifying party under this Section 7, notify the indemnifying party in
writing of the commencement thereof and generally summarize such action. The
indemnifying party shall have the right to participate in and to assume the
defense of such claim; provided, however, that the indemnifying party shall be
entitled to select counsel for the defense of such claim with the approval of
any parties entitled to indemnification, which approval shall not be
unreasonably withheld; provided further, however, that if either party
reasonably determines that there may be a conflict between the position of the
Company and the Holders in conducting the defense of such action, suit or
proceeding by reason of recognized claims for indemnity under this Section 7,
then counsel for such party shall be entitled to conduct the defense to the
extent reasonably determined by such counsel to be

                                      -10-
<PAGE>
necessary to protect the interest of such party. The failure to notify an
indemnifying party promptly of the commencement of any such action, if
prejudicial to the ability of the indemnifying party to defend such action,
shall relieve such indemnifying party, to the extent so prejudiced, of any
liability to the indemnified party under this Section 7, but the omission so to
notify the indemnifying party will not relieve such party of any liability that
such party may have to any indemnified party otherwise other than under this
Section 7.

         7.4 Contribution. If the indemnification provided for in this Section 7
is held by a court of competent jurisdiction to be unavailable to an indemnified
party with respect to any loss, liability, claim, damage, or expense referred to
therein, then the indemnifying party, in lieu of indemnifying such indemnified
party hereunder, shall contribute to the amount paid or payable by such
indemnified party as a result of such loss, liability, claim, damage, or expense
in such proportion as is appropriate to reflect the relative fault of the
indemnifying party on the one hand and of the indemnified party on the other in
connection with the statements or omissions that resulted in such loss,
liability, claim, damage, or expense as well as any other relevant equitable
considerations. The relative fault of the indemnifying party and of the
indemnified party shall be determined by reference to, among other things,
whether the untrue or alleged untrue statement of a material fact or the
omission to state a material fact relates to information supplied by the
indemnifying party or by the indemnified party and the parties' relative intent,
knowledge, access to information, and opportunity to correct or prevent such
statement or omission.

         7.5 Underwriting Agreement. Notwithstanding the foregoing, to the
extent that the provisions on indemnification and contribution contained in the
underwriting agreement entered into in connection with the underwritten public
offering are in conflict with the foregoing provisions, the provisions in the
underwriting agreement shall control.

         7.6 Survival. The obligations of the Company and Holders under this
Section 7 shall survive the completion of any offering of Registrable Securities
in a registration statement under this Agreement, and otherwise.

8. Limitations on Registration Rights Granted to Other Securities. From and
after the date of this Agreement, the Company shall not enter into any agreement
with any holder or prospective holder of any securities of the Company providing
for the granting to such holder of any Registration rights except for
Registration rights that are entirely subordinate to, and do not interfere with,
the rights of the Holders; provided that, with the consent of (i) the Holders of
a majority of the shares of Series A Preferred Stock (and/or Registrable
Securities into which the Series A Preferred Stock is converted and as adjusted
for stock splits, combinations and the like) and (ii) the Required Holders.
Additional holders may be added as parties to this Agreement with regard to any
or all securities of the Company held by them. Any such additional parties shall
execute a counterpart of this Agreement, and upon execution by such additional
parties and by the Company, shall be considered a Holder for all purposes of
this Agreement.

9. Transfer of Rights. The right to cause the Company to Register securities
granted by the Company to the Holders under this Agreement may be assigned by
any Holder to a transferee or assignee of any Convertible Securities or
Registrable Securities not sold to the public acquiring at least 300,000 shares
of Series A Preferred Stock or at least 7,500 shares of Senior Common Stock (or
Registrable Securities into which such shares of Series A Preferred Stock or
Senior

                                      -11-
<PAGE>
Common Stock have been converted) equitably adjusted for any stock splits,
subdivisions, stock dividends, changes, combinations or the like, immediately
prior to the transfer; provided, however, that (x) the Company must receive
written notice 10 days prior to the time of said transfer, stating the name and
address of said transferee or assignee and identifying the securities with
respect to which such information and Registration rights are being assigned,
and (y) the transferee or assignee of such rights must not be a person to whom
transfer of such securities is prohibited by the Stock Purchase Agreement or the
Securities Purchase Agreement as applicable. Notwithstanding the limitations set
forth in the foregoing sentence, (i) any Holder which is a partnership may
transfer such Holder's Registration rights to such Holder's constituent
partners; and (ii) any Holder which is a corporation may transfer such Holder's
Registration rights to any corporation or other entity at least 50% in interest
of which is owned by such Holder or the owners of at least 50% in interest of
such Holder without restriction as to the number or percentage of shares
acquired by any such constituent partner, corporation or other entity.

10. Market Stand-off. Each Holder that, immediately after the closing of the
IPO, will hold five percent (5%) of the Company's outstanding stock hereby
agrees that, if so requested by the Company and the Underwriter's Representative
(if any), such Holder shall not sell or otherwise transfer any Registrable
Securities or other securities of the Company during the 180-day period
following the effective date of the Company's Registration for the IPO, provided
that such restriction shall only apply if the Company shall have also obtained
from each of its directors and executive officers their agreement to be bound by
the same restriction.

11. Limitations on Registration; Conversion of Preferred Stock.

         11.1 No Action Letter. Notwithstanding anything else in this Agreement,
if the Company shall have obtained from the Commission a "no-action" letter in
which the Commission has indicated that it will take no action if, without
Registration under the Securities Act, any Holder disposes of Registrable
Securities covered by any request for Registration made under this Agreement in
the specific manner in which such Holder proposes to dispose of the Registrable
Securities included in such request (such as including, without limitation,
inclusion of such Registrable Securities in an underwriting initiated by either
the Company or the Holders), or if in the written opinion of counsel for the
Company concurred in by counsel for such Holder, which concurrence shall not be
unreasonably withheld, no Registration under the Securities Act is required in
connection with such disposition, the Registrable Securities included in such
request shall not be eligible for Registration under this Agreement; provided,
however, that any Registrable Securities not so disposed of shall be eligible
for Registration in accordance with the terms of this Agreement with respect to
other proposed dispositions to which this Section 11 does not apply.

         11.2 Conversion. The Registration rights of the Holders of the
Registrable Securities set forth in this Agreement are conditioned upon the
conversion of the Convertible Securities with respect to which Registration is
sought into Registrable Securities no later than immediately prior to the
closing of the applicable sale of securities.

         11.3 Termination. Notwithstanding any other provision of this
Agreement, the Company shall not be obligated to Register any Holder's
Registrable Securities pursuant to this Agreement if at the time the request
therefor is received, such requesting Holder and all of his

                                      -12-
<PAGE>
affiliates then have the right to sell all Registrable Securities owned by such
persons within a single three-month period without registration pursuant to Rule
144 under the Securities Act (or any successor rule).

12.      Information.

         12.1 Financial Statements and Reports to Holders. The Company shall
deliver to the Initial Stockholder (or a permitted transferee that acquires at
least 750,000 shares of Series A Preferred Stock (or Registrable Securities into
which such shares have been converted) equitably adjusted for any stock splits,
subdivisions, stock dividends, changes, combinations or the like) and each
Purchaser (or permitted transferees of the Purchasers):

                  (a) within 120 days after the end of each fiscal year of the
Company, a balance sheet of the Company as of the end of such year and
statements of income and cash flows for such year, which year-end financial
reports shall be in reasonable detail and prepared in accordance with generally
accepted accounting principles consistently applied and shall be audited and
accompanied by the opinion of independent public accountants of a "Big 5"
accounting firm approved by the Board of Directors of the Company;

                  (b) within 45 days after the end of each of its first three
fiscal quarters, unaudited financial statements of the Company on a quarterly
basis prepared in accordance with generally accepted accounting principles and
fairly reflecting the fiscal affairs of the Company to the date thereof;

                  (c) contemporaneously with delivery to holders of Common Stock
of the Company, a copy of each report of the Company delivered to holders of
Common Stock;

                  (d) a notice summarizing any material litigation initiated by
or against the Company and any material developments regarding any such
litigation or regarding other material legal or regulatory issues, in each case
promptly after the occurrence thereof; and

                  (e) such other available information as is reasonably
requested.

         12.2 Additional Reports to Initial Stockholder. The Company shall
deliver to the Initial Stockholder (or a permitted transferee that acquires at
least 750,000 shares of Series A Preferred Stock (or Registrable Securities into
which such shares have been converted) equitably adjusted for any stock splits,
subdivisions, stock dividends, changes, combinations or the like) as soon as
approved by the Board of Directors of the Company, each operating and/or capital
budget and plan (the "Plan") respecting the next fiscal year and a summary of
each such Plan containing a monthly financial budget together with any update of
the Plan as such update is prepared.

         12.3 Rule 144 Reporting. With a view to making available the benefits
of certain rules and regulations of the Commission which may permit the sale of
the Registrable Securities to the public without Registration, the Company
shall:

                  (a) make and keep public information available as those terms
are understood and defined in Rule 144 under the Securities Act, at all times
from and after 90 days

                                      -13-
<PAGE>
following the effective date of the first registration under the Securities Act
filed by the Company for an offering of its securities to the general public;
and

                  (b) file with the Commission in a timely manner all reports
and other documents required of the Company under the Securities Act and the
Securities Exchange Act at any time after it has become subject to such
reporting requirements.

13. Inspection. The Company shall permit the Initial Stockholder (or its
designated representative), at the Initial Stockholder's expense, to visit and
inspect the Company's properties, to examine its books of account and records
and to discuss the Company's affairs, finances and accounts with its officers,
all at such reasonable times as may be requested by the Initial Stockholder (or
its designated representative); provided, however, that the Company shall not be
obligated pursuant to this Section 13 to provide any information which it
reasonably considers a trade secret or confidential information.

14. Termination of Covenants. The covenants of the Company set forth in Sections
12.1, 12.2 and 13 shall be terminated, and be of no further force or effect,
upon the closing of the IPO.

15. Miscellaneous.

         15.1 Entire Agreement; Successors and Assigns. This Agreement
constitutes the entire contract between the Company and the Holders relative to
the subject matter hereof. Subject to the exceptions specifically set forth in
this Agreement, the terms and conditions of this Agreement shall inure to the
benefit of and be binding upon the respective executors, administrators, heirs,
successors and assigns of the parties.

         15.2 Governing Law. This Agreement shall be governed by and construed
in accordance with the laws of the State of Delaware applicable to contracts
entered into and wholly to be performed within the State of Delaware.

         15.3 Counterparts. This Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

         15.4 Headings. The headings of the Sections of this Agreement are for
convenience and shall not by themselves determine the interpretation of this
Agreement.

         15.5 Notices. Any notice required or permitted hereunder shall be given
in writing and shall be conclusively deemed effectively given upon personal
delivery, or one day after sent via reputable national overnight courier
addressed (i) if to the Company, as set forth below the Company's name on the
signature page of this Agreement, and (ii) if to a Holder, at such Holder's
address as set forth on the signature pages hereto, or at such other address as
the Company or such Holder may designate by ten (10) days advance written notice
to the Holders or the Company, respectively.

         15.6 Amendment of Agreement. Any provision of this Agreement may be
amended or waived only by a written instrument signed by the Company and with
the consent of (i) any

                                      -14-
<PAGE>
Holder or Holders who in the aggregate hold at least fifty percent (50%) of the
Common Stock issued or issuable upon conversion of the Series A Preferred Stock,
(ii) the Required Holders and (iii) the Lenders; provided, however, that no
amendment to this Agreement shall become effective without the consent of any
party hereto whose rights hereunder are adversely affected by such amendment;
and further provided, however, that (A) amendments or waivers only affecting
Holders of Series A Preferred Stock or of Common Stock issued upon conversion of
Series A Preferred Stock may be effectuated without the consent of (1) the
Required Holders and (2) the Lenders; (B) amendments or waivers only affecting
Holders of Senior Common Stock or of Common Stock issued upon conversion of
Senior Common Stock may be effectuated without the consent of (1) the Holder or
Holders who in the aggregate hold at least fifty percent (50%) of the Common
Stock issued or issuable upon conversion of the Series A Preferred Stock and (2)
the Lenders; and (C) amendments or waivers only affecting the Lenders may be
effectuated without the consent of (1) the Holder or Holders who in the
aggregate hold at least fifty percent (50%) of the Common Stock issued or
issuable upon conversion of the Series A Preferred Stock and (2) the Required
Holders.

                                      -15-
<PAGE>
                  IN WITNESS WHEREOF, the parties hereto have executed this
Agreement as of the day and year first above written.

                            COMPANY:

                            BENTLEY SYSTEMS, INCORPORATED
                            a Delaware corporation

                            By:      /s/  David Nation
                               -----------------------------------------
                                     Name:  David Nation
                                     Title:  Senior Vice President

                            Address:            690 Pennsylvania Drive
                                                Exton, PA 19341-1136
                            Attention:          President
                            With a copy to:     General Counsel
                            Telephone:          (610) 458-5000
                            Facsimile:          (610) 458-1060

                            INITIAL STOCKHOLDER:

                            BACHOW INVESTMENT PARTNERS, III, L.P.
                            By:    Bala Equity Partners, L.P., general partner
                            By:    Bala Equity, Inc., general partner

                            By:      /s/  Jay D. Seid
                               -----------------------------------------
                                     Name:  Jay D. Seid
                                     Title:  Vice President

                            Address:   3 Bala Plaza East, Suite 502
                                       Bala Cynwyd, PA 19004
                            Attention: Jay D. Seid, Managing Director
                            Telephone: (610) 660-4900
                            Facsimile: (610) 550-4930

                                      -16-
<PAGE>
                            PURCHASERS:

                            /s/  Gregory S. Bentley
                            ----------------------------------------------------
                            Gregory S. Bentley

                            Address: 201 Bentley Lane
                                     East Fallowfield, PA 19320

                            /s/  Keith A. Bentley
                            ----------------------------------------------------
                            Keith A. Bentley

                            Address: 100 Morningside Drive
                                     Elverson, PA 19520

                            /s/  Barry J. Bentley
                            ----------------------------------------------------
                            Barry J. Bentley

                            Address: 281 Grove Road
                                     Elverson, PA 19520

                            /s/  Cristobal Conde
                            ----------------------------------------------------
                            Cristobal Conde

                            Address: 560 Lexington Ave., 9th Floor
                                     New York, NY  10022

                            /s/  David Ehret
                            --------------------------------------------
                            David Ehret

                            Address: 2 Independence Place
                                     Apt.  1407
                                     Philadelphia, PA  19106

                            /s/  Robert Greifeld
                            ----------------------------------------------------
                            Robert Greifeld

                            Address:

                                      -17-
<PAGE>
                            LENDERS:
                                     /s/ Craig T. Scheetz
                            ------------------------------------------------

                            PNC Bank, National Association

                            Address: 1600 Market Street
                                     Philadelphia, PA  19103
                                     Attn: Craig T. Scheetz, Vice President

                                     /s/ Juan Carlos Lorenzo
                            ------------------------------------------------

                            Citibank, N.A.

                            Address: 153 East 53rd Street
                                     25th Floor, Zone 5
                                     New York, NY 10043
                                     Attn:  Juan Lorenzo, Vice President

                                      -18-

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