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EXHIBIT 10.43    
  

May 28th,
2002 

Andrew
Uprichard, MD

92 Bullard St.

Sherborn, MA 01770 

Dear
Andrew, 

        I
am pleased to offer you the position of Chief Operating Officer reporting to myself at a bi-weekly rate of $11,153.85, which annualizes to $290,000 per year. For the first
year only (August 1, 2002 though December 31st, 2002), we will pay your cash bonus as a signing bonus of $25,000. For 2003 and beyond, your bonus target will be 20%,
subject to being an employee in good standing. Compensation is reviewed every January for all employees and is subject to performance-based increases. Your first review will be in January of 2003. 

        Employment
at ArQule is at-will and is contingent upon your execution of the company's standard Non-Disclosure & Inventions Agreement and verification of
authorization to work in the United States. In the event of termination without cause, (cause including, but not being limited to, failure to perform duties, refusal to follow reasonable instructions,
dishonesty, moral turpitude or breach of confidentiality) or in the event of a change in control resulting in the scope of your responsibilities being substantially reduced, you will be eligible to
receive 12 months of salary and benefits. 

        Subject
to the approval of the ArQule Board of Directors, you would also receive 125,000-150,000 options to purchase common stock of ArQule, Inc. These options would
vest at a rate of twenty-five percent annually commencing on the first anniversary of your employment with ArQule. 

        You
and your dependents are entitled to ArQule's comprehensive health package including medical and dental. You are also provided life insurance at two times your annual salary up to
$300,000 and long and short-term disability insurance. In addition, you will receive four weeks of paid leave, which will be
accrued on a monthly basis. You will also be eligible to enroll in our company sponsored 401K Plan on the first day of any quarter. 

        ArQule
is an organization that is building an outstanding reputation for innovation in Drug Discovery. Credit for this goes to every one of our employees. We look forward to you
accepting our offer and becoming part of the ArQule Team as of July 22, 2002. 

        If
you need further information regarding this offer or any other aspect of employment at ArQule feel free to reach me either by phone (781)-994-3311 or via email
at shill@arqule.com 

        With
best regards, 

	

/s/ Stephen A. Hill

Stephen Hill

Chief Executive Officer, ArQule, Inc.	
 	

 	

Accepted by: /s/ Andrew Uprichard

Andrew Uprichard

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EXHIBIT 10.43QuickLinks
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Exhibit 4.19  

 
  AMENDMENT NO. 1 TO RIGHTS AGREEMENT    
  

        This AMENDMENT NO. 1 TO RIGHTS AGREEMENT (this "Amendment") is entered into as of December 30, 2002 (the
"Amendment Effective Date") by and between PRIMUS TELECOMMUNICATIONS GROUP, INCORPORATED, a Delaware corporation (the
"Company"), and STOCKTRANS, INC. (the "Rights Agent") with respect to that certain Rights
Agreement, dated as of December 23, 1998 (the "Rights Agreement"), between the Company and the Rights Agent. 

 
 

W I T N E S S E T H:    
  

        WHEREAS, the Company desires to effect certain amendments to the Rights Agreement in order to facilitate the proposed issuance and sale by the Company of certain
shares of its capital stock in a new series referred to below as the Series C Preferred; and 

        WHEREAS,
Section 26 of the Rights Agreement provides that, if the Company so directs at any time prior to the Distribution Date (as defined therein), any provision of the Rights
Agreement may be amended or supplemented as so directed, without any further requirement of approval or consent by any other person or entity; and 

        WHEREAS,
the Company, having delivered to the Rights Agent the certificate of the Company's appropriate officer as referred to in Section 26 of the Rights Agreement, hereby
directs that the Rights Agreement be amended in the manner set forth in this Amendment, and the Rights Agent hereby acknowledges receipt of such certificate and such direction, and agrees that the
Rights Agreement shall be amended as provided herein. 

        NOW,
THEREFORE, in consideration of the mutual covenants and agreements herein contained and for other good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the Company and the Rights Agent, intending to be legally bound hereby, agree as follows: 

        1.    Defined Terms; Incorporation of Recital.    As used in this Amendment, all capitalized terms appearing without
definition herein shall have the meanings ascribed to such terms in the Rights Agreement. The recitals above are hereby incorporated as if set forth separately herein. 

        2.    Amendment to Rights Agreement.    Subject to Section 3 below, the Rights Agreement is hereby amended as
of the Amendment Effective Date in the following manner: 

        (a)  the
definition of the term "Exempt Person" appearing in Section 1(i) of the Rights Agreement is amended by inserting into such definition a new
clause (ii) to read in its entirety as follows: 

"    (ii)    any
Person at any time acquiring or beneficially owning (or entering into any agreement, commitment or understanding to acquire or beneficially own) any shares of or
interests in (x) the Company's Series C Preferred or (y) any Company Common Stock or other Company securities by virtue of any conversion, exercise or exchange of, or any dividend
or distribution upon or in respect of, any shares of or interests in the Series C Preferred; and" 

        (b)  a
new defined term is hereby inserted, in the proper alphabetical sequence, into Section 1 of the Rights Agreement, to read in its entirety as follows: 

"    (s1)    "Series C Preferred" means the Series C Convertible Preferred Stock, par value $0.01 per
share, of the Company having the voting powers, designations, preferences and relative, participating, optional and other special rights and qualifications, limitations and restrictions described in
the Certificate of Designation filed by the Company with the Secretary of State of the State of Delaware on December 30, 2002. In no circumstance where used in or in connection with this
Agreement shall the term "Preferred Stock" be 

deemed or construed as in any manner to include or refer to the Series C Preferred or any shares thereof or interests therein." 

        3.    Confirmation of Rights Agreement.    The amendments set forth herein are limited precisely as written and shall
not be deemed to be a modification of any other term or condition in the Rights Agreement or any agreement or document referred to therein. Except as expressly amended hereby, the terms and conditions
of the Rights Agreement shall continue in full force and effect, and the Rights Agreement, as amended hereby, is ratified and confirmed in all respects. From and after the Amendment Effective Date,
any reference to the Rights Agreement shall mean the Rights Agreement as amended hereby. 

        4.    Counterparts.    This Amendment may be executed in one or more counterparts, each of which shall be deemed an
original, but all of which together shall constitute one and the same instrument. Signatures need not appear on the same counterpart. 

        5.    Governing Law.    This Amendment shall in all respects be governed by, and construed in accordance with, the
laws of the State of Delaware (without regard to principles of conflict of laws which would require the application of the law of another jurisdiction). 

[signature page follows]

        IN
WITNESS WHEREOF, the Company and the Rights Agent have caused this Amendment to be duly executed as of the Amendment Effective Date. 

	 	 	PRIMUS TELECOMMUNICATIONS GROUP,

    INCORPORATED
	

 	
 	

By:	
 	
/s/ John F. DePodesta

	 	 	 	 	Name:	 	John F. DePodesta
	 	 	 	 	Title:	 	Executive Vice President
	

    	
 	

 	
 	

 	
 	

 
	

 	
 	
STOCKTRANS, INC.
	

 	
 	

By:	
 	
/s/ Gina Hardin

	 	 	 	 	Name:	 	Gina Hardin
	 	 	 	 	Title:	 	Vice President

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AMENDMENT NO. 1 TO RIGHTS AGREEMENT

W I T N E S S E T H<Page>

                                                                  EXHIBIT 10.4.2

July 5, 2002

Glenn Barrett

Dear Glenn:

                  RE:  AMENDMENT TO EMPLOYMENT AGREEMENT

We refer to the employment agreement (the "Agreement") dated May 1, 2000 between
724 Solutions Inc. ("724") and you, Glenn Barrett. As you know, 724 is currently
considering various strategic options. In order to provide you with comfort and
certainty while 724 considers these options, 724 desires and you have agreed to
make certain amendments to the Agreement, on the terms and conditions set forth
in this letter agreement.

In consideration of the foregoing and the mutual agreements contained herein
(the receipt and adequacy of which are acknowledged), we and you agree as
follows:

   1.    The entire Sections of the Agreement under the headings "TERMINATION"
         on page 4, and "COMPENSATION ON TERMINATION FOR CAUSE" on page 5 are
         hereby deleted and replaced with the following:

"TERMINATION

         (a)      TERMINATION OF EMPLOYMENT. Neither 724 nor you makes any
                  representation to the other that employment will continue for
                  a set period of time or that employment will be terminated
                  only under particular circumstances. Both 724 and you may
                  terminate your employment at any time or for any reason,
                  subject to the provisions of this agreement.

         (b)      TERMINATION OBLIGATIONS.  You agree as follows:

                  (i)      All property, including, without limitation, all
                           equipment, tangible proprietary information
                           (including confidential data), documents, books,
                           records, reports, notes, contracts, lists, computer
                           disks (and other computer-generated files and data),
                           and copies thereof, created on any medium and
                           furnished to, obtained by, or prepared by you in the
                           course of or incident to his employment, belongs to
                           724 or its affiliates and shall be returned promptly
                           to 724 upon termination of your employment by either
                           724, for any reason (and whether for Cause or not),
                           or you.

                  (ii)     All benefits to which you are otherwise entitled
                           shall cease upon your termination for any reason (and
                           whether for Cause or not), unless explicitly
                           continued either under this agreement, under any

<Page>

                           specific written policy or benefit plan of 724 or its
                           affiliates, or as may be required by statute.

                  (iii)    Upon termination of employment for any reason (and
                           whether for Cause or not) under this agreement, you
                           shall be deemed to have resigned from all offices and
                           directorships then held with 724 or any subsidiary.
                           You shall sign any document or do such things that
                           are reasonably required by 724 to give effect to any
                           such resignation. Should you fail to do so, any
                           director of 724 is hereby irrevocably authorized in
                           your name and on his behalf to sign any document or
                           do any thing that is required to give effect thereto.

                  (iv)     Your obligations under this section "Termination"
                           shall survive the termination of this agreement and
                           the termination of employment for any reason (and
                           whether for Cause or not).

                  (v)      Following any voluntary termination of employment or
                           termination for Good Reason by you, you shall, where
                           reasonably requested by 724, reasonably cooperate
                           with 724 for a reasonable period of time after such
                           termination of employment in the orderly transition
                           of duties and work assignments to other employees of
                           724 and its affiliates, provided that 724 continues
                           to pay you compensation on a per diem basis, at a
                           rate equal to your base salary in effect at your
                           date of termination, during any such reasonable
                           period of time that your cooperation is requested.
                           You shall also reasonably cooperate, at 724's
                           expense, in the defense of any action brought by any
                           third party against 724 and its affiliates that
                           relates in any way to your acts or omissions while
                           employed by 724 and its affiliates.

         (c)      TERMINATION UPON DEATH. If you die during your employment,
                  this agreement shall automatically terminate.

         (d)      TERMINATION UPON DISABILITY. If during your employment, you
                  shall become physically or mentally incapacitated and as a
                  result thereof you are unable to perform the essential
                  functions of your position with or without a reasonable
                  accommodation, for a continuous period of more than 120 days,
                  then 724 and you specifically agree that this agreement has
                  been frustrated, and therefore 724 is entitled to terminate
                  your employment on one month's notice or grant you one month's
                  salary in lieu of notice.

         (e)      TERMINATION OF EMPLOYMENT TERM WITHOUT CAUSE.724 reserves the
                  right to terminate your employment without Cause at any time
                  upon paying to the you a lump sum payment of an amount equal
                  to nine (9) months of On-Target Earnings, less statutory
                  deductions and withholdings (the "Severance Amount"), which
                  amount the parties agree is pay-in-lieu

<Page>

                  of reasonable notice. You agree to release 724 and its
                  affiliates from any action, cause of action, claim or demand
                  against 724 or any other person, which may arise as a
                  consequence of such termination and to sign a waiver and
                  release to this effect in a form satisfactory to 724 as a
                  condition to receiving payment under this Section (e). For
                  purposes of this agreement, "On-Target Earnings" means, as of
                  any date, your then current base salary and target bonus.

         (f)      TERMINATION FOR GOOD REASON. You may terminate your employment
                  for Good Reason at any time. Upon such termination for Good
                  Reason, 724 shall pay you the Severance Amount. You agrees to
                  release 724 and its affiliates from any action, cause of
                  action, claim or demand against 724 or any other person, which
                  may arise as a consequence of such termination and to sign a
                  waiver and release to this effect in a form satisfactory to
                  724 as a condition to receiving payment under this Section
                  (f). For purposes of this agreement, "Good Reason" will exist
                  at any time following the occurrence of one or more of the
                  following events without the your written consent:

                  (i)      the assignment to you of any duties materially
                           inconsistent with your position, authority, duties or
                           responsibilities pursuant to this agreement or any
                           other action by the 724 that results in a material
                           diminution in such position, authority, duties or
                           responsibilities;

                  (ii)     a reduction in your compensation and benefits as set
                           forth in Schedule "A"; or

                  (iii)    relocation, without your consent of your place of
                           employment by more than fifty (50) miles;

provided however, that you shall not terminate your employment hereunder unless
you first gives notice of his intention to terminate and the grounds for such
termination, and 724 has not, within thirty (30) days following receipt of such
notice, cured such Good Reason.

         (g)      TERMINATION OF EMPLOYMENT TERM FOR CAUSE. 724 may at any time
                  and without notice immediately terminate your employment for
                  Cause and you shall have no right to receive any compensation
                  or benefit hereunder (with the exception of compensation
                  earned but unpaid as of the termination date). For purposes of
                  this agreement, "Cause" will exist at any time following the
                  occurrence of one or more of the following events:

                  (i)      any willful act of personal dishonesty, fraud or
                           misrepresentation taken by you in connection with his
                           responsibilities as an employee

<Page>

                           which was intended to result in your substantial
                           gain or personal enrichment at the expense of 724 or
                           its affiliates;

                  (ii)     your conviction of a felony (other than
                           driving-related offenses), or the equivalent in a
                           jurisdiction other than the United States, on account
                           of any act which was materially injurious to 724 or
                           any of its affiliates, or the reputation of 724 or
                           any of its affiliates, as reasonably determined by
                           the Board of Directors of 724;

                  (iii)    your willful and continued failure to substantially
                           perform your principal duties and obligations of
                           employment (other than any such failure resulting
                           from incapacity due to physical or mental illness;

provided, that for purposes of this Section (g), no act or failure to act shall
be considered "willful" unless done or omitted to be done by you in bad faith
and without reasonable belief that the act or omission was in or not opposed to
the best interests of 724; provided, further, that 724 shall not terminate your
employment under clause (iii) of this Section (g) unless 724 first gives notice
of its intention to terminate and the grounds for such termination, and you have
not, within thirty (30) days following receipt of such notice, cured such
failure.

         (h)      VOLUNTARY TERMINATION PERIOD. you may terminate this agreement
                  upon giving of 12 weeks' prior notice to 724 (or such lesser
                  period of time as the parties may agree upon), in which case
                  this agreement shall terminate at the expiration of such 12
                  week period without any other notice or any payment of salary
                  or benefit plan contributions subsequent to the termination of
                  this agreement.

         (i)      REPAYMENT OF BONUSES AND OTHER ADVANCES. You agree to permit
                  724 or its affiliates to deduct the amount of any advanced
                  bonuses or other monies advanced to you during your employment
                  and so designated as advanced amounts, from any compensation
                  due you under this Section "Termination".

         (j)      TREATMENT OF STOCK OPTIONS, RESTRICTED STOCK AND OTHER
                  SECURITIES. Notwithstanding any other provisions of this
                  agreement, upon any termination of you for any reason and
                  whether for Cause or not, any options, restricted stock or
                  other securities held by you but subject to vesting which is
                  contingent upon continued employment with 724 or its
                  affiliates shall be governed by the provisions of the
                  applicable stock plans and repurchase and award agreements."

   2.    Schedule "A" to the Agreement is hereby amended effective on the date
         of this letter agreement by deleting the amount "$170,000" in Section 1
         of Schedule "A" and replacing it with "$169,150 USD"

<Page>

On and after this date, each reference in the Agreement to "this agreement"
shall mean and be a reference to the Agreement as amended by this letter
agreement. Except as specifically amended by this letter agreement, the
Agreement shall remain in full force and effect and is hereby ratified and
confirmed.

This letter agreement shall be governed by and interpreted and enforced in
accordance with the laws of the Province of Ontario and the federal laws of
Canada applicable therein.

Please sign and date this letter in the space provided below to confirm the
mutual agreements set forth above.

Yours very truly,

724 SOLUTIONS INC.

By:       /s/          Karen Basian
          ----------------------------------------------
          Name:   Karen Basian
          Title:  Chief Financial Officer

ACCEPTED AND AGREED

          /s/ Glenn Barrett
          ----------------------------------------------
          Glenn Barrett

<Page>

                                    AGREEMENT

May 1, 2000

Glenn Barrett

          RE:      EMPLOYMENT AS VICE-PRESIDENT, FINANCE AND CONTROL

724 Solutions is pleased to extend to you an offer as a full-time employee on
the terms and conditions set out in this agreement. We are looking forward to
your joining the team. It is a condition of your employment that you sign and
execute a copy of this agreement and all accompanying documentation and
return it to us by MAY 11, 2000 after which time this offer will terminate.

EMPLOYMENT.  724  Solutions  agrees to employ you as a  Vice-President,
Finance  and Control  and you accept  such  employment  on and subject to the
terms of this agreement.

TERM.  Your employment with 724 Solutions will start effective JUNE 5, 2000.

DUTIES.  So long as you are employed by 724 Solutions:

(a)      you will devote your full time and energy to the business and
          affairs of 724 Solutions, well and faithfully serve 724 Solutions,
          and use your best efforts, skills and abilities to promote the
          interests of 724 Solutions and agree to perform such other tasks and
          duties related to the foregoing as may from time to time be
          determined by the 724 Solutions management;

(a)      you acknowledge that the 724 Solutions management reserves the right
          during the course of your employment to enhance or modify your
          duties and responsibilities as its deems necessary and appropriate
          from time to time;

(b)      you will abide by any 724 Solutions policies that the Board of
          Directors of 724 Solutions may establish or amend having general
          application to 724 Solutions' staff and management; and

(c)      you acknowledge that the hours of work involved will vary and be
          irregular and are those hours required to meet the objectives of 724
          Solutions and you acknowledge that this paragraph constitutes an
          agreement to work such hours where such agreement is required by
          applicable legislation.

COMPENSATION AND BENEFITS. Your compensation and benefits are listed in
Schedule "A" to this agreement. Your compensation will be payable bi-weekly
and will be subject to such periodic review as may be deemed appropriate by
the Board of Directors of 724 Solutions from time to time.

OWNERSHIP OF WORK. You expressly acknowledge that 724 Solutions shall have
all proprietary rights and intellectual property interests, in everything
that you create, develop, discover or conceive, by yourself or with others,
while employed by 724 Solutions, including customer and supplier lists, sales
and marketing plans, reports, drawings, prototypes, schematics, software,

<Page>

inventions, specifications, confidential data and the like (the
"Developments"), if the Developments:

(a)      relate in any manner to the actual business, research or development
          of 724 Solutions (or its subsidiaries, affiliates, partnerships and
          joint ventures); or

(b)      relate in any manner to the reasonably anticipated business,
          research or development of 724 Solutions (or its subsidiaries,
          affiliates, partnerships and joint ventures); or

(c)      are suggested by or result from matters with which you are aware as
          a result of your employment with 724 Solutions; or

(d)      are  suggested by or result from any task  assigned to you or work
          performed by you for or on behalf of 724 Solutions (or its
          subsidiaries, affiliates, partnerships and joint ventures);

You hereby assign fully to 724 Solutions any rights, title and interest that
you may have in the Developments to date or will later do so, whether or not
these Developments are capable of intellectual property protection, and agree
to sign appropriate documentation as requested by 724 Solutions to confirm
such ownership. You also agree, in connection with any Developments, to
promptly disclose them to 724 Solutions or its designee as appropriate,
promptly execute a specific assignment of title to 724 Solutions or its
designee, and do anything else reasonably necessary to enable 724 Solutions
or its designee to secure patent, copyright or other forms of protection for
the Developments in Canada and in all other countries, at 724 Solutions'
expense.

Without limitation, all working papers, notes and memoranda or other
manifestations of confidential data which are made or obtained by you during
the term of your employment relating to the business of 724 Solutions shall
be the property of 724 Solutions and will accordingly be, provided to 724
Solutions upon termination of your employment.

WAIVER OF MORAL RIGHTS. You hereby expressly and irrevocably waive any and
all moral rights arising under copyright law that you, as author, may have
with respect to any copyrighted works prepared by you for 724 Solutions in
the course of your employment and you agree that 724 Solutions (and is
subsidiaries, affiliates, partnerships, joint ventures, direct and indirect
licensees) may modify, adapt, translate and use such works as it sees fit.
You also expressly waive any right that you may have as author of a work of
authorship to include your name in any Development that is a work of
authorship when such work is distributed publicly or otherwise.

CONFIDENTIAL DATA AND NON-DISCLOSURE. 724 Solutions (and its subsidiaries,
affiliates, partnerships and joint ventures) will expend considerable time
and money in acquiring and developing software, hardware, inventions, trade
secrets, products, technology, techniques, methodologies, programs, present
and future developments, sales literature and brochures, form documents,
customer lists, customer and supplier relationships, marketing or sales
strategies, and other information excluding confidential information and
documents of third parties (the "confidential data") to which you may have
access. You acknowledge that such confidential data is the property of 724
Solutions (and its subsidiaries, affiliates, partnerships and joint
ventures), and third parties from which 724 Solutions has acquired
confidential data, and agree that, during the term of your employment and any
time thereafter, you will not, directly or indirectly, in any manner or for
any reason whatsoever (other than in the ordinary and usual

                                       2
<Page>

course of 724 Solutions' (and its subsidiaries, affiliates, partnerships and
joint ventures) business and for its benefit), disclose to any person, firm
or corporation any of the confidential data or use any of the confidential
data, except if the confidential data:

(i)      is or becomes publicly available through no fault of yours;

(i)      is rightfully obtained by you from a third party;

(ii)     is disclosed with the written consent of the party whose information
         it is; or

(iii)    is disclosed pursuant to court order, other legal compulsion or
         required by law.

On termination of your employment, you agree to return to 724 Solutions (and
its subsidiaries, affiliates, partnerships and joint ventures) all
confidential data embodied or recorded in tangible form which is in your
possession or control. Your obligation under this section will continue if
your employment with 724 Solutions terminates for any reason.

You also agree, not to disclose to 724 Solutions (and its subsidiaries,
affiliates, partnerships and joint ventures), use in its business or cause it
to use any information that is confidential to others. For greater certainty,
you agree to not, at any time, disclose to, or discuss with, 724 Solutions
(and its subsidiaries, affiliates, partnerships and joint ventures) employees
any confidential or proprietary data belonging to your former employers.

NON-COMPETITION AND NON-SOLICITATION. You recognize that in performing the
duties of your employment, you will occupy a position of trust and
confidence, giving you knowledge with respect to many aspects of the business
carried on by 724 Solutions (and its subsidiaries, affiliates, partnerships
and joint ventures). Such knowledge shall be used solely in furtherance of
the business interests of 724 Solutions (and its subsidiaries, affiliates,
partnerships and joint ventures) and not in any manner which would be
detrimental to it. You agree that so long as you are employed by 724
Solutions and for one (1) year thereafter, unless you obtain the prior
written consent of 724 Solutions, you shall not directly or indirectly, in
any manner or capacity whatsoever:

(a)      carry on or be engaged in or hold any interest in or advise, manage
          or assist in any business enterprise which is in significant
          competition (as reasonably determined by 724 Solutions) with the
          business of 724 Solutions (and its subsidiaries, affiliates,
          partnerships and joint ventures) as it exists at the date on which
          your employment terminates ("Competitive Business"); or

(b)      solicit or enter into any form, of business arrangement with any
          person who was or is proposed to be a client, supplier or business
          partner of 724 Solutions (and its subsidiaries, affiliates,
          partnerships and joint ventures) at the date that your employment
          terminates, or during the prior one (1) year period, if such
          business arrangement or proposed business arrangement is in respect
          of a Competitive Business;

provided however, that nothing in this paragraph shall prevent you from
owning up to 5% of the voting stock of any entity.

                                       3
<Page>

EMPLOYEES. You agree that during the term of your employment and for one (1)
year thereafter, you will not, directly or indirectly, or assist others to,
recruit, solicit or endeavour to entice away from 724 Solutions (or its
subsidiaries, affiliates, partnerships and joint ventures) any individual who
was or becomes an employee of or service provider to 724 Solutions (or its
subsidiaries, affiliates, partnerships and joint ventures) at any time within
the one (1) year period before or after termination of your employment.

COVENANTS REASONABLE AND INJUNCTION. You acknowledge that (a) the covenants
contained in the paragraphs entitled "Confidential Data and Non-Disclosure",
"Non-Competition and Non-Solicitation" and "Employees" are essential elements
to this agreement and that, but for your agreement to enter into such
covenants, 724 Solutions would not have entered into this agreement with you;
and (b) since your breach of any of such provisions would cause serious and
irreparable harm to 724 Solutions which could not adequately be compensated
for in damages, and in the event of a breach by you of any of such
provisions, you consent to an injunction being issued against you restraining
you from any further breach of any such provision. The provisions of this
paragraph shall not be construed so as to be derogation of any other remedy,
which 724 Solutions may have in the event of such a breach.

The existence of any claim or cause of action that you may have against 724
Solutions (or its subsidiaries, affiliates, partnerships and joint ventures),
whether pursuant to this agreement or otherwise, shall not constitute a
defence to the enforcement by 724 Solutions of the provisions of this
paragraph or the paragraphs entitled "Confidential Data and Non-Disclosure",
"Non-Competition and Non-Solicitation" and "Employees".

TERMINATION.  Your employment may be terminated by 724 Solutions:

   (a)   without  compensation  at any time and for any reason during the
          first three (3) months of your  employment with 724 Solutions
          ("Probation Period");

   (b)   without compensation, for cause, which shall include, without
          limitation:

         (i)      any willful and continuing failure by you to observe and
                    perform any of your covenants and obligations hereunder;

         (i)      fraud, dishonesty, gross negligence or willful malfeasance
                    by you in connection  with the  performance  of your duties
                    hereunder;

         (ii)     any commission of a crime by you;

         (iii)    any use or abuse of alcohol or drugs by you which adversely
                    affects your ability to perform your duties hereunder; or

         (iv)     your death; or

   (c)   without cause at any time upon giving you notice or payment in lieu
          of notice and severance, as required by any statutory and common law
          requirement applying to your employment with 724 Solutions, and as
          provided in this agreement, payable on your delivery of a release to
          the Board of Directors of 724 Solutions.

                                       4
<Page>

COMPENSATION ON TERMINATION FOR CAUSE. If your employment is terminated for
cause, 724 Solutions shall pay you your salary and benefits through the date
of termination and 724 Solutions shall have no further obligations to you
under this agreement or in connection with your employment by 724 Solutions.

NOTICES. Any notice which may or is required to be given pursuant to this
agreement shall be in writing and shall be sufficiently given or made if
mailed by prepaid registered mail, faxed or served personally upon the party
for whom it is intended, addressed to the other party at the address or fax
number first above written. The date of receipt of any notice, if served
personally or by fax, shall be deemed to be the date of delivery thereof and,
if mailed, the third business day after delivery.

ASSIGNMENT. You acknowledge that 724 Solutions may assign this agreement and
the benefits of your covenants and obligations under this agreement to any
person who purchases all or substantially all the assets of 724 Solutions. In
addition, this agreement and the rights and obligations of 724 Solutions may
be assigned at any time by 724 Solutions to an affiliate of 724 Solutions.
Subject to the forgoing, neither this agreement nor any rights or obligations
hereunder shall be assignable by any party without the prior written consent
of the other party. Subject thereto, this agreement shall enure to the
benefit of and be binding upon the parties and their respective heirs,
executors, administrators, legal personal representatives, successors
(including any successor by reason of amalgamation or statutory arrangement
of any party) and permitted assigns.

INVALIDITY AND SEVERABILITY. If a court of competent jurisdiction would
otherwise adjudge, declare or decree all or any portion of the covenants set
forth in this agreement void or unenforceable in the circumstances, the
portions thereof which would otherwise be held void or unenforceable shall,
automatically and without further act on the part of either of us, but only
as regards those matters or parties before the court, be reduced in scope,
territory or duration of time to such an extent that such court would hold
the same to be enforceable in the circumstances before the court, or
alternatively, that provision shall be deemed to be severed herefrom, and the
remaining provisions of this agreement shall not be affected thereby and
shall remain valid and enforceable.

FURTHER ASSURANCES. You agree to do such acts and execute such further
documents, conveyances, deeds, assignments, transfers and the like, and will
cause the doing of such acts and will cause the execution of such further
documents as are within your power as we may in writing at any time and from
time to time reasonably request be done and or executed, in order to give
full effect to the provisions of this agreement.

                                       5
<Page>

                                  SCHEDULE "A"

                          COMPENSATION AND BENEFITS OF
                                  GLENN BARRETT

1.       SALARY. Your salary will be $170,000 per annum. You will also be
          eligible to earn in bonus up to 15% of your salary in the first year
          based on 724 Solutions meeting its profit/revenue objectives and
          targets AND you meeting the performance and deliverable targets set
          by 724 Solutions from time to time.

2.       PARKING. Paid parking will be provided within the York Mills Center.

3.       VACATION. You will be entitled to a vacation of 3 weeks in each
          calendar year. Such vacations shall be taken at such time as 724
          Solutions may from time to time approve, having regard to the
          operations of 724 Solutions. Vacation time shall be cumulative, in
          accordance with 724 Solutions' standard policies.

4.       BENEFITS. You will be entitled to participate in any plans
          maintained from time to time by 724 Solutions for the benefit of 724
          Solutions' employees, including, but not limited to, those
          pertaining to group life, accident, dental, prescription, sickness
          and medical, and long term disability insurance, provided that
          premiums for such coverages are reasonable, as determined by 724
          Solutions in its sole discretion. You will be required to pay for
          the premiums for 724 Solutions' mandatory long term disability (LTD)
          plan. The premium will be automatically deducted from your pay
          cheque.

5.       OPTIONS TO PURCHASE SHARES.

               a.       Subject to you and 724 Solutions entering into 724
                           Solutions' standard Option Agreement, 724 Solutions
                           hereby grants to you:

         (a)   the option to purchase 10,000 common shares of 724 Solutions
                (or the group of companies that forms 724 Solutions), at their
                Market Price (as defined in the Stock Option Plan) on the date
                of the grant (your first day of employment with 724
                Solutions), which option vests on and continues from the first
                anniversary of your employment; and

         (b)   the option to purchase an additional 10,000 common shares of
                724 Solutions (or the group of companies that forms 724
                Solutions), at their Market Price (as defined in the Stock
                Option Plan) on the date of the grant (your first day of
                employment with 724 Solutions), which option vests on and
                continues from the second anniversary of your employment; and

         (c)   the option to purchase an additional 10,000 common shares of
                724 Solutions (or the group of companies that forms 724
                Solutions), at their Market Price (as defined is the Stock
                Option Plan) on the date of the grant (your first day of
                employment with 724 Solutions), which option vests on and
                continues from the third anniversary of your employment.

                                       6
<Page>

Please note that the terms and conditions of the Option Agreement govern the
options granted in this agreement and from time to time. In particular, you
should note that your entitlement to unvested options will be automatically
forfeited if your employment with 724 Solutions terminates for any reason.

WAIVER OF RIGHTS. Any waiver of, or consent to depart from, the requirements
of any provision of this agreement shall be effective only if it is in
writing and signed by the party giving it, and only in the specific instance
and for the specific purpose for which it has been given. No failure on the
part of any party to exercise, and no delay in exercising, any right under
this agreement shall operate as a waiver of such right. No single or partial
exercise of any such right shall preclude any other or further exercise of
such right or the exercise of any other right.

ENTIRE AGREEMENT. This agreement and the schedules hereto constitute the
entire agreement between us pertaining to your employment by 724 Solutions
and supersedes all prior agreements, negotiations, discussions and
understandings, written or oral, between us. This agreement may be amended or
supplemented only by a written agreement signed by both 724 Solutions and you.

TIME OF THE ESSENCE. Time is and shall remain of the essence of this
agreement and all of its provisions.

CHOICE OF LAW.  This agreement is governed by the laws of Ontario.

                            Yours truly,

                            724 SOLUTIONS INC.

                            By: /s/ KAREN BASIAN
                                -------------------------
                                  Karen Basian
                                  Chief Financial Officer

Accepted this 10th day of May 2000.

/s/ GLENN BARRETT
-----------------
Glenn Barrett

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