Document:

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Exhibit 4.2

Form of Registration Rights Agreement

     REGISTRATION RIGHTS AGREEMENT, dated as of ___, 200___(this “Agreement”), by and
among Thomas Weisel Partners Group, Inc., a Delaware corporation (the “Company”), California Public Employees’ Retirement System
(“CalPERS”), Nomura America Investment, Inc., a Delaware corporation (“Nomura”),
each electing Class A-1 Shareholder (as defined below) listed on Annex I hereto and each electing
Class C Shareholder (as defined below) listed on Annex II hereto.

     WHEREAS, CalPERS holds all of the issued and outstanding Class D Redeemable Convertible Shares
of Thomas Weisel Partners Group LLC, a Delaware limited liability company (“TWPG LLC”), and
expects to receive certain shares of the Company’s common stock, par value $0.01 per share (the
“Common Stock”) in connection with the reorganization of TWPG LLC;

     WHEREAS, Nomura holds all of the issued and outstanding Class D-1 Redeemable Convertible
Shares of TWPG LLC, and expects to receive certain shares of Common Stock in connection with the
reorganization of TWPG LLC;

     WHEREAS, Class A-1 Shareholders expect to receive certain shares of Common Stock in connection
with the reorganization of TWPG LLC;

     WHEREAS, Class C Shareholders expect to receive certain shares of Common Stock in connection
with the reorganization of TWPG LLC; and

     WHEREAS, the Company has agreed to provide the Holders (as defined below) with certain
registration rights as set forth in this Agreement;

     NOW, THEREFORE, in consideration of the premises and the covenants hereinafter contained and
for other good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the Company, CalPERS, Nomura, each electing Class A-1 Shareholder and each electing
Class C Shareholder hereby agree as follows:

Section 1. Definitions

     Section 1.1 Unless otherwise indicated, capitalized terms used in this Agreement shall have
the following meanings:

     “Affiliate” means, with respect to any specified Person, any other Person that
directly, or indirectly through one or more intermediaries, controls, is controlled by, or is under
common control with, such specified Person.

 

 

     “Agreement” shall have the meaning set forth in the preamble of this Agreement.

     “Business Day” means any day that is not a Saturday, a Sunday or a day on which
commercial banks are required or permitted by law to be closed in the City of New York in the State
of New York or the City of San Francisco in the State of California.

     “CalPERS” shall have the meaning set forth in the preamble of this Agreement.

     “Class A-1 Shareholder” means a Person (other than any Person party to the Partners’
Equity Agreement) who holds Class A-1 Shares of TWPG LLC as of the date hereof.

     “Class C Shareholder” means a Person who holds Class C Preference Shares of TWPG LLC
as of the date hereof.

     “Commission” means the United States Securities and Exchange Commission.

     “Common Stock” shall have the meaning set forth in the recitals of this Agreement.

     “Company” shall have the meaning set forth in the preamble of this Agreement.

     “Demand Filing Date” shall have the meaning set forth in Section 3.1 of this
Agreement.

     “Demand Holder” shall have the meaning set forth in Section 3.1 of this Agreement.

     “Demand Registration” shall have the meaning set forth in Section 3.1 of this
Agreement.

     “Demand Request” shall have the meaning set forth in Section 3.1 of this Agreement.

     “Exchange Act” means the Securities Exchange Act of 1934, as amended from time to
time.

     “Form S-3” shall have the meaning set forth in Section 4 of this Agreement.

     “Holder” means any Person who owns Registrable Securities, which shall include
CalPERS, Nomura, each electing Class A-1 Shareholder and each electing Class C Shareholder and any
of their successors, transferees and assigns permitted under Section 11.6 of this Agreement.

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     “Indemnified Party” shall have the meaning set forth in Section 9.3 of this Agreement.

     “Indemnifying Party” shall have the meaning set forth in Section 9.3 of this
Agreement.

     “IPO” means the initial public offering of shares of Common Stock pursuant to a
registration statement on Form S-1 under the Securities Act.

     “Lock-Up Agreement” means the agreement between a Holder and an underwriter or
underwriters for an Underwritten Offering, pursuant to which such Holder agrees that it will not
offer to sell, contract to sell, or otherwise sell, dispose of, loan, pledge or grant any rights
with respect to any shares of Common Stock, any options or warrants to purchase any shares of
Common Stock, or any securities convertible into or exchangeable for any shares of Common Stock now
owned or hereafter acquired directly by the Holder or with respect to which the Holder has or
hereafter acquires the power of disposition; provided however, that such restrictions shall not
apply to any securities of a Holder being sold in such Underwritten Offering and, provided further,
that all other holders of at least 1% of the Company’s outstanding securities and all executive
officers and directors of the Company also agree to such restrictions. Notwithstanding the
foregoing, if any holder of the Company’s securities is released, in whole or in part, by the
Company or the underwriters from the restrictions set forth in the Lock-Up Agreement, the Holders
shall be released (on a pro rata basis) from their respective lock-up restrictions as well.

     “Lock-Up Period” means the respective period agreed to by a Holder and an underwriter
or underwriters for an Underwritten Offering during which time such Holder agrees that it will not
offer to sell, contract to sell, or otherwise sell, dispose of, loan, pledge or grant any rights
with respect to any shares of Common Stock, any options or warrants to purchase any shares of
common stock, or any securities convertible into or exchangeable for any shares of Common Stock now
owned or hereafter acquired directly by the Holder or with respect to which the Holder has or
hereafter acquires the power of disposition; provided however, that such restrictions shall not
apply to any securities of a Holder being sold in such Underwritten Offering, and, provided
further, that such restrictive period shall not exceed 120 days in the case of any Underwritten
Offering other than an IPO.

     “Losses” shall have the meaning set forth in Section 9.1 of this Agreement.

     “Merger Agreement” means the Plan of Reorganization and Merger Agreement, dated as of
October 14, 2005, by and among TWPG LLC, the Company and TWPG Merger Sub LLC.

     “Maximum Offering Size” shall have the meaning set forth in Section 2.2 of this
Agreement.

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     “Nomura” shall have the meaning set forth in the preamble of this Agreement.

     “Partners’ Equity Agreement” means the Partners’ Equity Agreement, dated as of
___, 200_, entered into by and between the Company and each partner of TWPG LLC who is expected
to receive shares of Common Stock pursuant to the Merger Agreement.

     “Person” means any individual, corporation, partnership, joint venture, firm, trust,
unincorporated organization, government or any agency or political subdivision thereof or other
entity.

     “Proceeding” means an action, claim, suit, investigation or proceeding (including,
without limitation, an investigation or partial proceeding, such as a deposition), whether
commenced or threatened.

     “Prospectus” means any prospectus included in a Registration Statement (including,
without limitation, a prospectus that includes any information previously omitted from a prospectus
filed as part of an effective Registration Statement in reliance upon Rule 430A promulgated under
the Securities Act), as amended or supplemented by any prospectus supplement, with respect to the
terms of the offering of any portion of the Registrable Securities covered by any Registration
Statement, and all other amendments and supplements to the Prospectus, including post-effective
amendments, and all material incorporated by reference in such Prospectus.

     “Registrable Securities” means, with respect to CalPERS, Nomura, each electing Class
A-1 Shareholder and each electing Class C Shareholder, shares of Common Stock issued or issuable to
each of them under Section 4.1(d), Section 4.1(e) and Section 4.1(f) of the Merger Agreement
(including any shares of Common Stock issuable upon exercise or deemed exercise of any warrants
issued pursuant to Section 4.1 of the Merger Agreement), respectively, in connection with the
reorganization of TWPG LLC; provided, however, that, in each case, the shares of Common Stock that
are Registrable Securities shall cease to be Registrable Securities at any time (x) when such
shares of Common Stock have been disposed of pursuant to an effective Registration Statement, or
(y) when such shares of Common Stock become eligible for sale under Rule 144(k) under the
Securities Act.

     “Registration Expenses” shall have the meaning set forth in Section 8 of this
Agreement.

     “Registration Statement” means any registration statement, including the Prospectus,
amendments and supplements to such Registration Statement or Prospectus, including pre- and
post-effective amendments, all exhibits thereto, and all material incorporated by reference in such
Registration Statement to be filed pursuant to the terms of this Agreement.

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     “Rule 144” means Rule 144 promulgated by the Commission pursuant to the Securities
Act, as amended from time to time, or any similar rule or regulation hereafter adopted by the
Commission having substantially the same effect as such Rule.

     “Securities Act” means the Securities Act of 1933, as amended from time to time.

     “TWPG LLC” shall have the meaning set forth in the recitals of this Agreement.

     “Underwritten Offering” means an offering in connection with which securities of the
Company are sold to an underwriter or underwriters for reoffering to the public pursuant to an
effective Registration Statement under the Securities Act.

Section 2. “Piggy-Back” Registrations

     Section 2.1 If at any time after the consummation of the IPO, the Company shall determine to
register, for its own account or the account of others under the Securities Act, including in
connection with (i) a public offering by the Company other than the IPO or (ii) a demand for
registration made by any stockholder of the Company (but excluding any of the Holders), any of its
equity securities (other than securities to be issued solely in connection with any acquisition of
an entity or business or shares of Common Stock issuable in connection with stock option or other
employee benefit plans registered on Form S-4 or Form S-8 or any successor forms), it shall send to
each Holder written notice of such determination and if, within 10 Business Days after receipt of
such notice, such Holder shall so request in writing, the Company shall use reasonable best efforts
to include in such Registration Statement all or any part of the Registrable Securities such Holder
requests to be registered.

     Section 2.2 If, in connection with any offering described in Section 2.1 of this Agreement
involving an underwriting of Common Stock to be issued by the Company, the managing underwriter or
underwriters shall impose a limitation (the “Maximum Offering Size”) on the number of
shares of Common Stock that may be included in the Registration Statement because, in the judgment
of such managing underwriter or underwriters, such limitation is necessary to effect an orderly
public distribution of such Common Stock, then, in the discretion of such managing underwriter or
underwriters, the Company shall include in the Registration Statement, in the following priority,
up to the Maximum Offering Size:

          (i) first, so much of the shares of Common Stock proposed to be registered for the
account of the Company as would not cause the offering to exceed the Maximum Offering Size,

          (ii) second, all Registrable Securities requested to be included in such registration
by any Holders pursuant to Section 2.1 and all shares of Common Stock contractually
required to be registered for the account of any other Persons, including those pursuant to
the Partners’ Equity Agreement

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(allocated, if necessary for the offering not to exceed the Maximum Offering Size, pro
rata among such Holders and such other Persons on the basis of the relative number of
Registrable Securities or such other shares of Common Stock so requested to be included in
such registration by each such Holder and such other Person), and

          (iii) third, any shares of Common Stock proposed, but not contractually required, to
be registered for the account of any other Persons with such priorities among them as the
Company may determine.

Section 3. “Demand” Registrations

     Section 3.1 At any time commencing at least 180 days after the effective date of a
registration statement on Form S-1 covering the IPO, either CalPERS or Nomura (a “Demand
Holder”) may make a written request (a “Demand Request”) for registration under the
Securities Act (a “Demand Registration”) of all or part of the Registrable Securities held
by such Demand Holder; provided, however, that the Registrable Securities requested to be
registered shall, on the date that the Demand Request is delivered, (i) constitute in the aggregate
at least 20 percent of the Registrable Securities then issued and outstanding, or (ii) have an
aggregate market value of at least US$15 million before calculation of underwriting discounts and
commissions, based on the closing trading price of shares of Common Stock on the date that the
Demand Request is delivered. Each Demand Request shall specify the number of Registrable Securities
proposed to be sold by such Demand Holder. Notwithstanding any other provisions in this Agreement,
the Company shall not be obligated to take any action to effect more than two Demand Registrations
pursuant to this Section 3.

     Section 3.2 Within 10 days after receipt of a Demand Request, the Company shall give written
notice of such Demand Request to all non-requesting Holders and shall use its best efforts to cause
such of the Registrable Securities as may be requested by any Holders thereof (including the Holder
or Holders giving the initial notice of intent to offer) to be included in a registration statement
to be filed with the Commission not later than 60 days after receipt of a Demand Request (the
“Demand Filing Date”) and shall use all commercially reasonable efforts to cause the same
to be declared effective by the Commission as promptly as practicable after such filing. Both the
Demand Request and any request to join in such Demand Request shall be considered a single Demand
Request. Any inclusion of Registrable Securities owned by a Demand Holder pursuant to a Demand
Request (including a notice to join in a prior Demand Request) shall be deemed to have been
effected pursuant to a single Demand Request.

     Section 3.3 Notwithstanding any other provision set forth in this Section 3, no Holder shall
be entitled to deliver a Demand Request within 90 days after the effectiveness of any Registration
Statement filed (i) by the Company pursuant to an Underwritten Offering by the Company other than
the IPO or (ii) on behalf of any Demand Holder or any other holder of Demand Registration rights,
provided that, in the

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case of clause (ii) the Holders had an opportunity to include Registrable Securities in such
Registration Statement.

     Section 3.4 A registration will not count as a Demand Registration until it has become
effective (unless the Demand Holder withdraws all of its Registrable Securities and the Company has
performed its obligations hereunder in all material respects, in which case such demand will count
as a Demand Registration); provided, that if, after it has become effective, an offering of
Registrable Securities pursuant to a registration is interfered with by any stop order, injunction,
or other order or requirement of the Commission or other governmental agency or court, such
registration will be deemed not to have been effected and will not count as a Demand Registration.

     Section 3.5 The Company may defer the filing of a Registration Statement required by this
Section 3 until a date not later than 90 days after the Demand Filing Date if:

     (a) at the time the Company receives the Demand Request, there is (i) material non-public
information regarding the Company which, in the judgment of the Board of Directors of the Company,
is not in the Company’s best interest to disclose and which the Company is not otherwise required
to disclose, or (ii) there is a significant business opportunity (including, but not limited to,
the acquisition or disposition of assets (other than in the ordinary course of business) or any
merger, consolidation, tender offer or other similar transaction) available to the Company which,
in the judgment of the Board of Directors of the Company, is not in the Company’s best interest to
disclose; or

     (b) prior to receiving the Demand Request, the Board of Directors of the Company had
determined to effect an Underwritten Offering, the Company has determined to proceed with such
offering.

     A deferral of the filing of a Registration Statement pursuant to this Section 3.5 shall be
lifted, and the requested Registration Statement shall be filed as promptly as practicable, but in
any event within 60 days, if, (x) in the case of a deferral pursuant to clause (a)(i), the material
non-public information is made public by the Company, (y) in the case of a deferral pursuant to
clause (a)(ii), the significant business opportunity is disclosed by the Company or is terminated,
or (z) in the case of a deferral pursuant to clause (b), the Company is no longer actively pursuing
such public offering. In order to defer the filing of a Registration Statement pursuant to this
Section 3.5, the Company shall promptly (but in any event within 10 days), upon determining to seek
such deferral, deliver to each Demand Holder a certificate signed by a duly authorized officer of
the Company stating that the Company is deferring such filing pursuant to this Section 3.5 and an
approximation of the anticipated delay.

     The Company shall not delay the filing of a Registration Statement pursuant to this Section
3.5 more than once in any 365-day period. The Company shall use all commercially reasonable
efforts to cause the filing of a Registration Statement required

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by this Section 3 as promptly as practicable upon the expiration of the deferral period
contemplated by this Section 3.5 and to cause the same to be declared effective by the Commission
as promptly as practicable after such filing.

     Section 3.6 If a Demand Registration involves an Underwritten Offering and the managing
underwriter or underwriters shall advise the Company and the requesting Holders that, in the
judgment of such managing underwriter or underwriters, the number of shares of Registrable
Securities requested to be included in such registration (including any shares of Common Stock that
the Company proposes to be included or are otherwise contractually required to be included that are
not Registrable Securities under this Agreement) exceeds the Maximum Offering Size, the Company
shall include in such registration, in the priority listed below, up to the Maximum Offering Size:

          (i) first, all Registrable Securities requested to be registered by the requesting
Holders (allocated, if necessary for the offering not to exceed the Maximum Offering Size,
pro rata among such Holders on the basis of the relative number of Registrable Securities
or such other shares of Common Stock so requested to be included in such registration by
each such Holder),

          (ii) second, shares of Common Stock contractually required to be registered for the
account of any other Persons, including those pursuant to the Partners’ Equity Agreement
(allocated, if necessary for the offering not to exceed the Maximum Offering Size, pro rata
among such other Persons on the basis of the shares of Common Stock so requested to be
included in such registration by such other Persons), and

          (iii) third, any shares of Common Stock proposed to be registered by the Company or
any shares of Common Stock proposed, but not contractually required, to be registered for
the account of any other Persons, with such priorities among them as the Company may
determine.

Section 4. Registration on Form S-3

     Section 4.1 After its IPO, the Company shall use commercially reasonable efforts to make all
regulatory and other filings necessary to qualify for registration on a registration statement on
Form S-3 (“Form S-3”) or any comparable or successor form or forms for secondary offerings
of equity securities for cash. After the Company has qualified for the use of Form S-3, in
addition to the rights contained in the foregoing provisions of Sections 2 and 3 hereof, the
Holders of Registrable Securities shall have the right to request registrations on Form S-3 (such
requests shall be in writing and shall state the number of shares of Registrable Securities to be
disposed of and the intended methods of disposition of such shares by such Holder or Holders),
provided, however, that the Company shall not be obligated to effect any such registration if the
Holders, together with the holders of any other securities of the Company entitled to inclusion in
such registration, propose to sell Registrable Securities and such other securities (if any) on

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Form S-3 at an aggregate price to the public of less than $5,000,000. Any registration on Form S-3
shall not be deemed to be a requested registration under Section 3 hereof.

     Section 4.2 Within 10 days after receipt of each request (a “S-3 Request”), the
Company shall give written notice of such S-3 Request to all non-requesting Holders and shall use
its best efforts to cause such of the Registrable Securities as may be requested by any Holders
thereof (including the Holder or Holders giving the initial notice of intent to offer) to be
included in a registration statement on Form S-3 to be filed with the Commission not later than 60
days after receipt of a S-3 Request and shall use all commercially reasonable efforts to cause the
same to be declared effective by the Commission as promptly as practicable after such filing. The
Company will not be required to include any other Registrable Securities or other shares of Common
Stock in such registration unless it receives from the other Holders or other Persons entitled to
participate in the registration a notice of intent to sell within 20 days of receipt of the
Company’s notice.

     Section 4.3 If a Form S-3 registration involves an Underwritten Offering and the Company,
following consultation with the managing underwriter determines that the number of shares of
Registrable Securities requested to be included in such registration (including any shares of
Common Stock that the Company proposes to be included or are otherwise contractually required to be
included that are not Registrable Securities under this Agreement) exceeds the Maximum Offering
Size, the Company shall include in such registration, in the priority listed below, up to the
Maximum Offering Size:

          (i) first, all Registrable Securities requested to be registered by the requesting
Holders (allocated, if necessary for the offering not to exceed the Maximum Offering Size,
pro rata among such Holders on the basis of the relative number of Registrable Securities
or such other shares of Common Stock so requested to be included in such registration by
each such Holder),

          (ii) second, shares of Common Stock contractually required to be registered for the
account of any other Persons, including those pursuant to the Partners’ Equity Agreement
(allocated, if necessary for the offering not to exceed the Maximum Offering Size, pro rata
among such other Persons on the basis of the shares of Common Stock so requested to be
included in such registration by such other Persons), and

          (iii) third, any shares of Common Stock proposed to be registered by the Company or
any shares of Common Stock proposed, but not contractually required, to be registered for
the account of any other Persons, with such priorities among them as the Company shall
determine.

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Section 5. Registration Procedures

     Whenever any Holder has requested that any Registrable Securities be registered pursuant to
this Agreement, the Company will use all commercially reasonable efforts to effect the registration
of such Registrable Securities. In furtherance thereof, the Company shall:

     (a) prepare and file with the Commission a Registration Statement on any appropriate form
under the Securities Act with respect to such Registrable Securities and use its reasonable efforts
to cause such Registration Statement to become effective;

     (b) prepare and file with the Commission such amendments, including post-effective amendments
and supplements to the Registration Statement as may be necessary to keep the Registration
Statement continuously effective as to the applicable Registrable Securities for a period of not
less than 180 days (or such lesser period as is necessary for the underwriters in an Underwritten
Offering to sell unsold allotments); (ii) cause the related Prospectus to be amended or
supplemented by any required Prospectus supplement, and as so supplemented or amended to be filed
pursuant to Rule 424 (or any similar rule then in effect) under the Securities Act; (iii) respond
as promptly as possible to any comments received from the Commission with respect to the
Registration Statement or any amendment thereto and as promptly as possible provide the Holders
true and complete copies of all correspondence from and to the Commission relating to the
Registration Statement; and (iv) comply in all material respects with the provisions of the
Securities Act and the Exchange Act with respect to the disposition of all Registrable Securities
covered by the Registration Statement during the applicable period in accordance with the intended
methods of disposition by the Holders thereof set forth in the Registration Statement as so amended
or in such Prospectus as so supplemented;

     (c) (i) furnish to the Holders of Registrable Securities to be sold, their counsel and any
managing underwriters, copies of all such documents proposed to be filed, which documents (other
than those incorporated by reference) will be subject to the review of such Holders, their counsel
and such managing underwriters, and (ii) cause its officers and directors, counsel and independent
registered public accounting firm to respond to such inquiries as shall be necessary, in the
reasonable opinion of counsel to such Holders and such managing underwriters, to conduct a
reasonable investigation within the meaning of the Securities Act. The Company shall not file a
Registration Statement to which the Holders of a majority of the Registrable Securities to be sold
or their counsel or any managing underwriters shall reasonably object in writing within five
Business Days of their receipt thereof;

     (d) notify the Holders of Registrable Securities to be sold, their counsel and any managing
underwriters as promptly as possible:

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     (i) when a Prospectus or any Prospectus supplement or post-effective amendment to the
Registration Statement is proposed to be filed;

     (ii) when the Commission notifies the Company whether there will be a “review” of such
Registration Statement and whenever the Commission comments in writing on such Registration
Statement;

     (iii) with respect to the Registration Statement or any post-effective amendment, when the
same has become effective;

     (iv) of any request by the Commission or any other federal or state governmental authority for
amendments or supplements to the Registration Statement or Prospectus or for additional
information;

     (v) of the issuance by the Commission of any stop order suspending the effectiveness of the
Registration Statement covering any of the Registrable Securities to be sold or the initiation of
any Proceedings for that purpose;

     (vi) if at any time any of the representations and warranties of the Company contained in any
agreement (including any underwriting agreement) contemplated hereby ceases to be true and correct
in all material respects;

     (vii) of the receipt by the Company of any notification with respect to the suspension of the
qualification or exemption from qualification of any of the Registrable Securities for sale in any
jurisdiction, or the initiation or threatening of any Proceeding for such purpose; and

     (viii) of the occurrence of any event that makes any statement made in the Registration
Statement or Prospectus or any document incorporated or deemed to be incorporated therein by
reference untrue in any material respect or that requires any revisions to the Registration
Statement, Prospectus or other documents so that, in the case of the Registration Statement or the
Prospectus, as the case may be, it will not contain any untrue statement of a material fact or omit
to state any material fact required to be stated therein or necessary to make the statements
therein, in light of the circumstances under which they were made, not misleading;

     (e) use all commercially reasonable efforts to avoid the issuance of, or, if issued, obtain
the withdrawal of (i) any order suspending the effectiveness of the Registration Statement or (ii)
any suspension of the qualification (or exemption from qualification) of any of the Registrable
Securities for sale in any jurisdiction, at the earliest practicable moment;

     (f) if requested by any managing underwriter for an Underwritten Offering, (i) promptly
incorporate in a Prospectus supplement or post-effective amendment to the Registration Statement
such information as the Company reasonably agrees should be

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included therein and (ii) make all
required filings of such Prospectus supplement or such post-effective amendment as soon as
practicable after the Company has received
notification of the matters to be incorporated in such Prospectus supplement or post-effective
amendment; provided, however, that the Company shall not be required to take any action pursuant to
this clause (f) that would, in the opinion of counsel to the Company, violate any applicable law or
be materially detrimental to the business of the Company;

     (g) to the extent such documents are not publicly available on the Commission’s EDGAR website,
furnish to each Holder of Registrable Securities to be sold, their counsel and any managing
underwriters, without charge, at least one conformed copy of each Registration Statement and each
amendment thereto, including financial statements and schedules, all documents incorporated or
deemed to be incorporated therein by reference, and all exhibits to the extent requested by such
Person (including those previously furnished or incorporated by reference) promptly after the
filing of such documents with the Commission;

     (h) promptly deliver to each Holder of Registrable Securities to be sold, their counsel and
any underwriters, without charge, as many copies of the Prospectus or Prospectuses (including each
form of prospectus) and each amendment or supplement thereto as such Persons may reasonably
request; and the Company hereby consents to the use of such Prospectus and each amendment or
supplement thereto by each of the selling Holders and any underwriters in connection with the
offering and sale of the Registrable Securities covered by such Prospectus and any amendment or
supplement thereto;

     (i) prior to any public offering of Registrable Securities, use its best efforts to register
or qualify or cooperate with the selling Holders, any underwriters and their counsel in connection
with the registration or qualification (or exemption from such registration or qualification) of
such Registrable Securities for offer and sale under the securities or “Blue Sky” laws of such
jurisdictions within the United States as any selling Holder or underwriter requests in writing, to
keep each such registration or qualification (or exemption therefrom) effective for at least 180
days and to do any and all other acts or things necessary or advisable to enable the disposition in
such jurisdictions of the Registrable Securities covered by a Registration Statement; provided,
however, that the Company shall not be required to qualify generally to do business in any
jurisdiction where it is not then so qualified or to take any action that would subject it to
general service of process in any such jurisdiction where it is not then so subject or subject the
Company to any material tax liability in any such jurisdiction where it is not then so subject;

     (j) cooperate with the selling Holders and any managing underwriters to facilitate the timely
preparation and delivery of certificates representing Registrable Securities to be sold pursuant to
a Registration Statement, which certificates shall be free, to the extent permitted by applicable
law, of all restrictive legends, and to enable such Registrable Securities to be in such
denominations and registered in such names as any such

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managing underwriters or Holders may request
at least five Business Days prior to any sale of Registrable Securities;

     (k) upon the occurrence of any event contemplated by Section 5(d)(viii) of this Agreement, as
promptly as possible, prepare a supplement or amendment, including a post-effective amendment, to
the Registration Statement or a supplement to the related Prospectus or any document incorporated
or deemed to be incorporated therein by reference, and file any other required document so that, as
thereafter delivered, neither the Registration Statement nor such Prospectus will contain an untrue
statement of a material fact or omit to state a material fact required to be stated therein or
necessary to make the statements therein, in light of the circumstances under which they were made,
not misleading;

     (l) use its best efforts to cause all Registrable Securities relating to such Registration
Statement to be listed on the securities exchange, quotation system, market or over-the-counter
bulletin board on which similar securities issued by the Company are then listed;

     (m) enter into such agreements (including an underwriting agreement in form, scope and
substance as is customary in Underwritten Offerings) and take all such other actions in connection
therewith (including those reasonably requested by any managing underwriter in order to expedite or
facilitate the disposition of such Registrable Securities, whether or not an underwriting agreement
is entered into):

     (i) make such representations and warranties to such selling Holders and such underwriters as
are customarily made by issuers to underwriters in Underwritten Offerings, and confirm the same if
and when requested;

     (ii) in the case of an Underwritten Offering, obtain and deliver copies thereof to the
managing underwriter or underwriters, if any, of opinions of counsel to the Company and updates
thereof addressed to each such underwriter, in form, scope and substance reasonably satisfactory to
any such managing underwriters and counsel to the selling Holders covering the matters customarily
covered in opinions requested in Underwritten Offerings and such other matters as may be reasonably
requested by such counsel and underwriters;

     (iii) immediately prior to the effectiveness of the Registration Statement, and, in the case
of an Underwritten Offering, at the time of delivery of any Registrable Securities sold pursuant
thereto, obtain and deliver copies to the selling Holders and the managing underwriters, if any, of
comfort letters and updates thereof from the independent registered public accounting firm of the
Company (and, if necessary, any other independent certified public accountants of any subsidiary of
the Company or of any business acquired by the Company for which financial statements and financial
data is, or is required to be, included in the Registration Statement), addressed to each selling

-13-

 

Holder and each of the underwriters, if any, in form and substance as are customary in connection
with Underwritten Offerings; and

     (iv) deliver such documents and certificates as may be reasonably requested by the selling
Holders, their counsel and any managing underwriters to evidence the continued validity of the
representations and warranties made pursuant to clause (m)(i) above and to evidence compliance with
any customary conditions contained in the underwriting agreement or other agreement entered into by
the Company;

     (n) make available for inspection by the selling Holders, any representative of such Holders,
any underwriter participating in any disposition of Registrable Securities, and attorney or
accountant retained by such selling Holder or underwriters, at the offices where normally kept,
during reasonable business hours, all financial and other records, pertinent corporate documents
and properties of the Company and its subsidiaries, and cause the officers, directors, agents and
employees of the Company and its subsidiaries to supply all information in each case reasonably
requested by any such Holder, representative, underwriter, attorney or accountant in connection
with the Registration Statement; provided, however, that any information that is determined in good
faith by the Company in writing to be of a confidential nature at the time of delivery of such
information shall be kept confidential by such Persons, unless (i) disclosure of such information
is required by court or administrative order or is necessary to respond to inquiries of regulatory
authorities; (ii) disclosure of such information, in the opinion of counsel to such Person, is
required by law; (iii) such information becomes generally available to the public other than as a
result of a disclosure or failure to safeguard by such Person; or (iv) such information becomes
available to such Person from a source other than the Company and such source is not known by such
Person to be bound by a confidentiality agreement with the Company; and

     (o) the Company may require each selling Holder to furnish to the Company information
regarding such Holder and the distribution of such Registrable Securities as is required by law to
be disclosed in the Registration Statement, and the Company may exclude from such registration the
Registrable Securities of any such Holder who unreasonably fails to furnish such information within
a reasonable time after receiving such request.

Section 6. Lock-Up Agreements

     Each Holder agrees, if such Holder is so requested by the managing underwriter in an
Underwritten Offering and whether or not such Holder is participating in such Underwritten
Offering, to enter into a Lock-Up Agreement, provided that the Lock-Up Period shall not exceed 120
days in the case of any Underwritten Offering other than an IPO; provided, however, that such
restrictions shall not apply to any securities of a Holder being sold in such Underwritten
Offering.

-14-

 

Section 7. Holder Covenants

     Each Holder hereby covenants and agrees that:

     (a) it will not sell any Registrable Securities under a Registration Statement until it has
received notice from the Company that such Registration Statement and any post-effective amendments
thereto have become effective;

     (b) it and its officers, directors or Affiliates, if any, will comply with the prospectus
delivery requirements of the Securities Act as applicable to them in connection with sales of
Registrable Securities pursuant to a Registration Statement;

     (c) by its acquisition of such Registrable Securities that, upon receipt of a notice from the
Company of the occurrence of any event of the kind described in Section 5(d)(iv), (v), (vi), (vii)
and (viii) of this Agreement, such Holder will forthwith discontinue disposition of such
Registrable Securities under the Registration Statement until such Holder’s receipt of the copies
of the supplemented Prospectus and/or amended Registration Statement or until it is advised in
writing by the Company that the use of the applicable Prospectus may be resumed, and, in either
case, has received copies of any additional or supplemental filings that are incorporated or deemed
to be incorporated by reference in such Prospectus or Registration Statement; and

     (d) it will cooperate with the Company and use its commercially reasonable efforts to take or
cause to be taken all action reasonably necessary to facilitate any registration contemplated by
this Agreement, to the extent such Holder participates in such registration or is otherwise
required to do so under this Agreement.

     (e) each Holder acknowledges that the Company has entered, or may in the future enter, into a
Partners’ Equity Agreement with partners of TWPG LLC, which provide such partners and their
permitted transferees with registration rights similar to those provided for under this Agreement.
Such agreements shall not be inconsistent with the rights granted to the Holders herein. The
Company has provided a copy of each agreement to the Holders or their counsel.

Section 8. Registration Expenses

     Except to the extent limited by any applicable law, all fees and expenses incident to the
performance of or compliance with this Agreement by the Company shall be borne by the Company,
whether or not pursuant to an Underwritten Offering, whether or not any Registration Statement is
filed or becomes effective and whether or not any Registrable Securities are sold pursuant to any
Registration Statement. The fees and expenses referred to in the foregoing sentence shall include,
without limitation, (i) all registration and filing fees (including, without limitation, fees and
expenses (A) with respect to filings required to be made with any securities exchange or market on
which Registrable Securities are required hereunder to be listed and (B) in compliance with state

-15-

 

securities or Blue Sky laws (including, without limitation, fees and disbursements of counsel for
the Holders in connection with Blue Sky qualifications of the Registrable Securities)); (ii)
printing expenses (including, without limitation, expenses of printing certificates for Registrable
Securities and of printing Prospectuses if the printing of
Prospectuses is requested by the managing underwriters, if any; (iii) messenger, telephone and
delivery expenses; (iv) fees and disbursements of counsel to the Company; (v) Securities Act
liability insurance, if the Company so desires such insurance; (vi) fees and expenses of all other
Persons retained by the Company in connection with the consummation of the transactions
contemplated by this Agreement; (vii) escrow fees; (viii) all internal expenses of the Company
incurred in connection with the consummation of the transactions contemplated by this Agreement
(including, without limitation, all salaries expenses of its officers and employees performing
legal or accounting duties, the expense of any annual audit, the fees and expenses incurred in
connection with the listing of the Registrable Securities on any securities exchange or market as
required hereunder; and (ix) fees and disbursements of single counsel to the selling Holders, not to
exceed $50,000 (all such expenses being referred to herein as “Registration Expenses”); provided,
however, that except as expressly set forth herein, in no event shall Registration Expenses include
any underwriting discounts or commissions relating to the sale of the Registrable Securities, any
transfer taxes relating to the sale of the Registrable Securities or any other expenses incurred by
the Holders, including, without limitation, fees and expenses of any, accountants or other persons
retained by the Holders, in connection with the consummation of the transactions contemplated by
this Agreement.

Section 9. Indemnification and Contribution

     Section 9.1 Indemnification by the Company. The Company shall, notwithstanding any
termination of this Agreement, indemnify and hold harmless each Holder and each of its officers,
directors, employees, representatives and agents and each underwriter of the Registrable Securities
and their officers, directors, affiliates, partners and any broker or dealer through whom such
shares may be sold and each Person, if any, who controls (within the meaning of Section 15 of the
Securities Act) such Holder or any such underwriter to the fullest extent permitted by applicable
law, from and against any and all losses, claims, damages, liabilities, costs (including, without
limitation, costs of preparation and attorneys’ fees) and expenses (collectively,
“Losses”), arising out of or relating to or based on any untrue or alleged untrue statement
of a material fact contained in any Registration Statement, any Prospectus or any form of
prospectus or in any amendment or supplement thereto or in any preliminary prospectus, or arising
out of or relating to any omission or alleged omission of a material fact required to be stated
therein or necessary to make the statements therein (in the case of any Prospectus or form of
prospectus or supplement thereto, in light of the circumstances under which they were made) not
misleading (in the case of any Prospectus or form of Prospectus or supplement thereto, in light of
the circumstances under which they were made), or any violation by the Company of the Securities
Act, the Exchange Act, any state securities law, or any rule or regulation promulgated under the
Securities Act, the Exchange Act or any state securities law except to the extent, but only to the
extent, that such untrue statements or

-16-

 

omissions arise solely out of or are based solely upon
information regarding such Holder furnished in writing to the Company by such Holder expressly for
use therein, which information was reasonably relied on by the Company for use therein or to the
extent that such information relates to such Holder or such Holder’s proposed method of
distribution
of Registrable Securities and was reviewed and expressly approved in writing by such Holder
expressly for use in any Registration Statement, such Prospectus or such form of Prospectus or in
any amendment or supplement thereto. The Company shall notify the Holders promptly of the
institution, threat or assertion of any Proceeding of which the Company is aware in connection with
the transactions contemplated by this Agreement.

     Section 9.2 Indemnification by Holders. Each Holder shall, severally and not jointly,
indemnify and hold harmless the Company, its officers, directors, employees, representatives and
agents, each Person who controls the Company (within the meaning of Section 15 of the Securities
Act and Section 20 of the Exchange Act), and the directors, officers, agents or employees of such
controlling Persons, to the fullest extent permitted by applicable law, from and against all Losses
(as determined by a court of competent jurisdiction in a final judgment not subject to appeal or
review) arising out of or relating to any untrue statement of a material fact contained in the
Registration Statement, any Prospectus, or any form of prospectus, or arising out of or relating to
any omission of a material fact required to be stated therein or necessary to make the statements
therein not misleading to the extent, but only to the extent, that such untrue statement or
omission is contained in any information so furnished in writing by such Holder to the Company
specifically for inclusion in the Registration Statement, such Prospectus or such form of
prospectus and that such information was reasonably relied upon by the Company for use in the
Registration Statement, such Prospectus or such form of prospectus or to the extent that such
information relates to such Holder or such Holder’s proposed method of distribution of Registrable
Securities and was reviewed and expressly approved in writing by such Holder expressly for use in
the Registration Statement, such Prospectus or such form of Prospectus; provided, however, that the
indemnity under this Section 9.2 shall not exceed the proceeds from the offering received by the
Holder.

     Section 9.3 Conduct of Indemnification Proceedings

     (a) If any Proceeding shall be brought or asserted against any Person entitled to indemnity
hereunder (an “Indemnified Party”), such Indemnified Party promptly shall notify the Person
from whom indemnity is sought (the “Indemnifying Party”) in writing, and the Indemnifying
Party shall assume the defense thereof, including the employment of counsel reasonably satisfactory
to the Indemnified Party and the payment of all fees and expenses incurred in connection with
defense thereof; provided, that the failure of any Indemnified Party to give such notice shall not
relieve the Indemnifying Party of its obligations or liabilities pursuant to this Agreement, except
(and only) to the extent that it shall be finally determined by a court of competent jurisdiction
(which determination is not subject to appeal or further review) that such failure shall have
proximately and materially adversely prejudiced the Indemnifying Party.

-17-

 

     (b) An Indemnified Party shall have the right to employ separate counsel in any such
Proceeding and to participate in the defense thereof, but the fees and expenses of such counsel
shall be at the expense of such Indemnified Party or Parties unless: (1) the
Indemnifying Party has agreed in writing to pay such fees and expenses; (2) the Indemnifying Party
shall have failed promptly to assume the defense of such Proceeding and to employ counsel
reasonably satisfactory to such Indemnified Party in any such Proceeding or (3) the named parties
to any such Proceeding (including any impeded parties) include both such Indemnified Party and the
Indemnifying Party, and such Indemnified Party shall have been advised by counsel that a conflict
of interest is likely to exist if the same counsel were to represent such Indemnified Party and the
Indemnifying Party (in which case, if such Indemnified Party notifies the Indemnifying Party in
writing that it elects to employ separate counsel at the expense of the Indemnifying Party, the
Indemnifying Party shall not have the right to assume the defense thereof and such counsel shall be
at the expense of the Indemnifying Party). The Indemnifying Party shall not be liable for any
settlement of any such Proceeding effected without its written consent, which consent shall not be
unreasonably withheld. No Indemnifying Party shall, without the prior written consent of the
Indemnified Party, effect any settlement of any pending Proceeding in respect of which Indemnified
Party is a party, unless such settlement includes an unconditional release of such Indemnified
Party from all liability on claims that are the subject matter of such Proceeding.

     (c) All fees and expenses of the Indemnified Party (including reasonable fees and expenses to
the extent incurred in connection with investigating or preparing to defend such Proceeding in a
manner not inconsistent with this Section 9.3) shall be paid to the Indemnified Party, within 10
Business Days of written notice thereof to the Indemnifying Party; provided, that the Indemnifying
Party may require such Indemnified Party to undertake to reimburse all such fees and expenses to
the extent it is finally judicially determined that such Indemnified Party is not entitled to
indemnification hereunder.

     Section 9.4 Contribution

     (a) If a claim for indemnification under Section 9.1 or 9.2 is unavailable to an Indemnified
Party because of a failure or refusal of a governmental authority to enforce such indemnification
in accordance with its terms (by reason of public policy or otherwise), then each Indemnifying
Party, in lieu of indemnifying such Indemnified Party, shall contribute to the amount paid or
payable by such Indemnified Party as a result of such Losses, in such proportion as is appropriate
to reflect the relative fault of the Indemnifying Party and Indemnified Party in connection with
the actions, statements or omissions that resulted in such Losses as well as any other relevant
equitable considerations. The relative fault of such Indemnifying Party and Indemnified Party shall
be determined by reference to, among other things, whether any action in question, including any
untrue or alleged untrue statement of a material fact or omission or alleged omission of a material
fact, has been taken or made by, or relates to information supplied by, such Indemnifying Party or
Indemnified Party, and the parties’ relative intent,

-18-

 

knowledge, access to information and
opportunity to correct or prevent such action, statement or omission. The amount paid or payable by
a party as a result of any Losses shall be deemed to include any reasonable attorneys’ or other
reasonable fees or expenses incurred by such party in connection with any Proceeding to the extent
such party would
have been indemnified for such fees or expenses if the indemnification provided for in Section 9.1
or 9.2 was available to such party in accordance with its terms.

     (b) The parties hereto agree that it would not be just and equitable if contribution pursuant
to this Section 9.4 were determined by pro rata allocation or by any other method of allocation
that does not take into account the equitable considerations referred to in the immediately
preceding paragraph. Notwithstanding any other provisions in this Section 9, no Person guilty of
fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be
entitled to contribution from any Person who was not guilty of such fraudulent misrepresentation.

     (c) The contribution agreement contained in this Section 9.4 is in addition to any liability
that the Indemnifying Parties may have to the Indemnified Parties.

     Section 9.5 Survival

     The obligations of the Company and the Holders under this Section 9 shall survive the
completion of any offering of Registrable Securities in a registration statement under this
Agreement and the termination of this Agreement.

Section 10. Reports Under Exchange Act

     The rights of Holders with respect to the registration rights granted pursuant to this
Agreement shall remain in effect, subject to the terms and conditions hereof, so long as there are
Registrable Securities issued and outstanding.

     Following the consummation of the IPO, the Company covenants that:

     (a) it will use all commercially reasonable efforts to make and keep public information
available, as necessary to permit sales of Registrable Securities under Rule 144, at all times
after the date the Company becomes subject to the reporting requirements of the Securities Act or
the Exchange Act;

     (b) it will use all commercially reasonable efforts to file the reports required to be filed
by the Company under the Exchange Act in a timely manner, so as to enable the Holders to sell
Registrable Securities pursuant to Rule 144 and to enable the Holders to utilize Form S-3 for the
sale of their Registrable Securities;

     (c) it will cooperate with any Holder in connection with any sale, transfer or other
disposition by such Holder of any Registrable Securities pursuant to Rule 144;

-19-

 

     (d) it will take such action as any Holder may reasonably request, to the extent required from
time to time to enable such Holder to sell its Registrable Securities without registration under
the Securities Act within the limitation of the exemptions provided by Rule 144, including
providing any legal opinions; and

     (e) upon the request of any Holder, it shall deliver to such Holder a written certification of
a duly authorized officer as to whether it has complied with such requirements.

Section 11. Miscellaneous

     Section 11.1 Entire Agreement. This Agreement contains the entire
understanding of the parties with respect to the subject matters hereof and supersedes all prior
agreements and understandings, oral or written, with respect to such matters.

     Section 11.2 Notices. Any and all notices or other communications or deliveries required
or permitted to be provided pursuant to this Agreement shall be in writing and shall be deemed to
have been effectively given (a) upon personal delivery to the party to be notified, (b) when sent
by confirmed telex or facsimile if sent during normal business hours of the party to be notified
or, if not, then on the next Business Day, (c) five Business Days after having been sent by
registered or certified mail, return receipt requested, postage prepaid, or (d) one Business Day
after deposit with a nationally recognized overnight courier, specifying next Business Day
delivery, with written verification of receipt. The address for the Company shall be: Thomas Weisel
Partners Group, Inc., One Montgomery Street, San Francisco, California 94104; Attention: General
Counsel; fax: (415) 364-2694. The addresses for each Holder shall be maintained by the Company and
each Holder shall promptly notify the Company of any changes thereof. Copies of all notices
pursuant to this Agreement shall also be sent to Sullivan & Cromwell LLP, 1870 Embarcadero Road,
Palo Alto, California 94303, Attn: Scott D. Miller, Esq.; fax: (650) 461-5700, or such other
address as may be designated in writing hereafter, in the same manner, by such person.

     Section 11.3 Remedies. The parties hereto agree that, to the extent permitted by
applicable law, (i) the obligations imposed on them under this Agreement are special, unique and of
an extraordinary character, and that in the event of a breach by any such party, damages would not
be an adequate remedy and (ii) each of the other parties shall be entitled to specific performance
and injunctive and other equitable relief in addition to any other remedy to which it may be
entitled at law or in equity.

     Section 11.4 Governing Law. This Agreement shall be governed by, and construed and
interpreted in accordance with, the laws of the State of New York.

     Section 11.5 Amendments and Waivers. No provision of this Agreement may be waived or
amended except in a written instrument signed, in the case of an amendment, by both the Company and
the Holders; or, in the case of a waiver, by the

-20-

 

party against whom enforcement of any such waiver
is sought. No waiver of any default with respect to any provision, condition or requirement of this
Agreement shall be deemed to be a continuing waiver in the future or a waiver of any other
provision, condition or requirement hereof, nor shall any delay or omission of either party to
exercise any right hereunder in any manner impair the exercise of any such right accruing to it
thereafter.

     Section 11.6 Successors and Assigns. This Agreement shall inure to the benefit of and be
binding upon the successors and permitted transferees and assigns of each of the parties hereto.
The rights of each Holder hereunder, including the right to have the Company register for sale the
Registrable Securities in accordance with the terms and conditions of this Agreement, shall be
automatically assignable by each Holder together with Registrable Securities, if (i) the Holder
agrees in writing with the transferee or assignee to assign such rights, and a copy of such
agreement is furnished to the Company within a reasonable time after such transfer or assignment,
(ii) the Company is, within a reasonable time after such transfer or assignment, furnished with
written notice of (a) the name and address of such transferee or assignee and (b) the securities
with respect to which such registration rights are being transferred or assigned, (iii) following
such transfer or assignment, the further disposition of such securities by the transferee or
assignees is restricted under the Securities Act and applicable state securities laws, (iv) at or
before the time the Company receives the written notice contemplated by clause (ii) of this Section
11.6, the transferee or assignee agrees in writing with the Company to be bound by all of the
provisions of this Agreement and (v) such transfer or assignment shall have been made in accordance
with the applicable requirements of any agreement applicable to the transfer or assignment of such
shares, including, without limitation, the Merger Agreement.

     Section 11.7 No Third-Party Beneficiaries. This Agreement is intended for the benefit of
the parties hereto and their respective permitted successors, transferees and assigns and is not
for the benefit of, nor may any provision hereof be enforced by, any other person.

     Section 11.8 Headings. The captions or headings in this Agreement are for convenience and
reference only, and in no way define, describe, extend or limit the scope or intent of this
Agreement.

     Section 11.9 Severability. If any clause, provision or section of this Agreement shall be
invalid or unenforceable, the invalidity or unenforceability of such clause, provision or section
shall not affect the enforceability or validity of any of the remaining clauses, provisions or
sections hereof to the extent permitted by applicable law. In such event, the parties shall
negotiate, in good faith, a valid, legal and enforceable substitute provision which most nearly
effects the intent of the parties in contrary into this Agreement.

[Signature page follows]

-21-

 

     IN WITNESS WHEREOF, this Agreement has been duly executed and delivered by the parties hereto
as of the date and year first written above.

	 	 	 	 	 
	 	THOMAS WEISEL PARTNERS 

GROUP, INC.

 	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 
	 
	 	CALIFORNIA PUBLIC EMPLOYEES’

RETIREMENT SYSTEM

 	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 
	 
	 	NOMURA AMERICA INVESTMENT,

INC.

 	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 
	 
	 	EACH PERSON LISTED ON ANNEX I 

AND ANNEX II HERETO

 	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	Attorney-in-Fact 	 
	 

-22-

 

Annex I

Electing Class A-1 Shareholders

 

 

Annex II

Electing Class C Shareholdersexv4w3

 

Exhibit 4.3

Form of Warrant

THIS WARRANT AND THE SHARES OF COMMON STOCK ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE BEEN OR
WILL BE ACQUIRED FOR INVESTMENT AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED (THE “1933 ACT”), OR ANY STATE SECURITIES LAWS. SUCH SECURITIES MAY NOT BE SOLD OR
TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN EXEMPTION THEREFROM UNDER THE 1933 ACT AND
ANY APPLICABLE STATE SECURITIES LAWS.

WARRANT TO PURCHASE _____________________ SHARES

OF THE COMMON STOCK OF

THOMAS WEISEL PARTNERS GROUP, INC.

Effective Date: __________, 200_

Expiration Date: _________, 20__1

     This certifies that NOMURA AMERICA INVESTMENT, INC. (the “Holder”) is entitled, subject to the
terms and conditions set forth below, to purchase from Thomas Weisel Partners Group, Inc., a
Delaware corporation (the “Company”), having its principal place of business at One Montgomery
Street, San Francisco, California 94104, a maximum of
                                         fully paid and
non-assessable shares of the Company’s common stock, par value $0.01 per share (“Common Stock”) for
cash at a price equal to $                     per share (the “Exercise Price”), which is equal to the initial
public offering price per share in the initial public offering (the “IPO”) of the Common Stock
consummated on                     , at any time and from time to time after the Effective Date up to and
including 5:00 p.m. Pacific time on the Expiration Date, upon the surrender to the Company at its
principal place of business (or at such other location as the Company may advise the Holder in
writing) of this Warrant properly endorsed, a Subscription Form in substantially the form attached
as Annex A hereto duly filled in and signed and, as applicable, upon payment in cash or by
certified check or wire transfer of the aggregate Exercise Price for the number of shares for which
this Warrant is being exercised determined in accordance with the provisions hereof, or the
surrender of the

 

			
	1	 	Insert the date that is the tenth anniversary of
the issue date.

1

 

right to acquire the number of shares of Common Stock determined in accordance with Section
1.2. The Exercise Price and the number of shares of Common Stock purchasable hereunder are subject
to adjustment as provided in Section 3 of this Warrant.

     This Warrant is being issued to the Holder pursuant to the terms of the Plan of Reorganization
and Merger Agreement, dated as of October 14, 2005 (the “Reorganization Agreement”), by and among
Thomas Weisel Partners Group LLC, the Company and TWPG Merger Sub LLC.

     This Warrant is subject to the following terms and conditions:

     1. EXERCISE; ISSUANCE OF CERTIFICATES; PAYMENT FOR SHARES.

     1.1 General. This Warrant is exercisable at the option of the holder of record hereof at
any time or from time, to time, up to the Expiration Date for all or any part of the shares of
Common Stock (but not for a fraction of a share), which may be purchased hereunder. The Company
agrees that the shares of Common Stock purchased under this Warrant shall be and are deemed to be
issued to the Holder hereof as the record owner of such shares as of the close of business on the
date on which this Warrant, properly endorsed, the completed and executed Subscription Form and
appropriate payment for such shares shall have each been delivered to the Company at its principal
place of business. Certificates for the shares of Common Stock so purchased, together with any
other securities or property to which the Holder is entitled upon such exercise, shall be delivered
to the Holder by the Company at the Company’s expense within a reasonable time after the rights
represented by this Warrant have been so exercised, and in any event, within ten (10) business days
of such exercise. In case of a purchase of less than all the shares which may be purchased under
this Warrant, the Company shall cancel this Warrant and execute and deliver a new Warrant or
Warrants of like tenor for the balance of the shares purchasable under the Warrant surrendered upon
such purchase to the Holder hereof within a reasonable time. Each stock certificate so delivered
shall be in such denominations of Common Stock as may be requested by the Holder hereof and shall
be registered in the name designated by such Holder. The term “business day” means any day other
than (a) a Saturday or Sunday or (b) a day on which banking institutions located in the City of New
York, New York or San Francisco, California are permitted or required by law, executive order or
governmental decree to remain closed.

     1.2 Net Issue Exercise. (a) In the event that the fair market value of one share of the
Company’s Common Stock is greater than the Exercise Price (at the date of calculation as set forth
below), in lieu of exercising this Warrant for cash, the Holder may elect a “Net Issue Exercise”
pursuant to which it will receive shares equal to the value (as determined below) of this Warrant
(or the portion thereof being exercised) by surrender of this Warrant at the principal office of
the Company together with the properly endorsed Subscription Form and notice of such election in
which event the Company shall issue to the Holder a number of shares of Common Stock computed using
the following formula:

2

 

X = Y (A-B)

          A

     Where X = the number of shares of Common Stock to be issued to the Holder

     Y = the number of shares of Common Stock purchasable under the Warrant or, if only a portion
of the Warrant is being exercised, the portion of the Warrant being exercised (at the date of such
exercise)

     A = the fair market value of one share of the Company’s Common Stock (at the date of such
exercise)

     B = Exercise Price (as adjusted to the date of such exercise).

For purposes of the above calculation, the fair market value of one share of Common Stock shall be
determined by the Company’s Board of Directors in good faith; provided, however, that where there
is a public market for the Company’s Common Stock, the fair market value per share shall be the
average of the closing prices of the Company’s Common Stock on the New York Stock Exchange, the
Nasdaq National Market or any other principal stock exchange or market on which the Common Stock is
listed or quoted, whichever is applicable, over the five (5) trading day period ending on the
trading day immediately preceding the day the Warrant is being exercised.

(b) Notwithstanding any provisions herein to the contrary, in the event that the Company’s market
capitalization on any date after the Effective Date but on or prior to the Expiration Date, as
calculated by multiplying (i) the fair market value of one share of the Common Stock, determined as
described in Section 1.2(a) above and (ii) the total number of shares of the Common Stock
outstanding on such date (without taking into consideration the shares of Common Stock issued in or
following the IPO), shall equal $1 billion, this Warrant shall be deemed automatically exercised on
first such date as a “Net Issue Exercise” as provided under Section 1.2(a) and the Company shall
issue to the Holder, upon the surrender of this Warrant by the Holder, that number of shares of
Common Stock that on such date have a fair market value (determined as provided above) equal to $18
million2 (unless a portion of this Warrant has previously been exercised in which case
the fair market value of the shares of Common Stock issued to

 

			
	2	 	$18 million is the difference between (A) $75
million and (B) the sum of (i) the fair market value on such date of the shares
of common stock received by the Holder pursuant to the Reorganization Agreement
(i.e., $44 million) and (ii) the principal amount of the senior note issued to
the Holder pursuant to the Reorganization Agreement (i.e., $13 million).

3

 

the Holder shall equal the same proportion of $18 million as the proportion of this Warrant that
has not been exercised).

     2. SHARES TO BE FULLY PAID; RESERVATION OF SHARES. The Company covenants and agrees that
all shares of Common Stock which may be issued upon the exercise of the rights represented by this
Warrant will, upon issuance, be duly authorized, validly issued, fully paid and non-assessable and
free from all preemptive rights of any shareholder and free of all transfer taxes, liens and
charges with respect to the issue thereof. The Company further covenants and agrees that, during
the period within which the rights represented by this Warrant may be exercised, the Company will
at all times have authorized and reserved, for the purpose of issue or transfer upon exercise of
the subscription rights evidenced by this Warrant, a sufficient number of shares of authorized but
unissued Common Stock, or other securities and property, when and as required to provide for the
exercise of the rights represented by this Warrant. The Company will take all such action as may be
necessary to assure that such shares of Common Stock may be issued as provided herein without
violation of any applicable law or regulation, or of any requirements of any securities exchange
upon which the Common Stock may be listed; provided, however, that the Company shall not be
required to effect a registration under federal or state securities or “Blue Sky” laws with respect
to this Warrant or the shares of Common Stock issuable upon exercise hereof. The Company will not
take any action which would result in any adjustment of the Exercise Price (as set forth in Section
3 hereof) if the total number of shares of Common Stock issuable after such action upon exercise of
all outstanding warrants, together with all shares of Common Stock then outstanding and all shares
of Common Stock then issuable upon exercise of all options and upon the conversion of all
convertible securities and other equity purchase rights then outstanding, would exceed the total
number of shares of Common Stock then authorized by the Company’s Certificate of Incorporation (the
“Company Charter”).

     3. ADJUSTMENT OF EXERCISE PRICE AND NUMBER OF SHARES. The Exercise Price and the number of
shares purchasable upon the exercise of this Warrant shall be subject to adjustment from time to
time upon the occurrence of certain events described in this Section 3. Upon each adjustment of the
Exercise Price, the Holder of this Warrant shall thereafter be entitled to purchase, at the
Exercise Price resulting from such adjustment, the number of shares obtained by multiplying the
Exercise Price in effect immediately prior to such adjustment by the number of shares purchasable
pursuant hereto immediately prior to such adjustment, and dividing the product thereof by the
Exercise Price resulting from such adjustment.

     3.1 Subdivision or Combination of Stock. In case the Company shall at any time subdivide
its outstanding shares of Common Stock into a greater number of shares, the Exercise Price in
effect immediately prior to such subdivision shall be proportionately reduced, and conversely, in
case the outstanding shares of Common Stock of the Company shall be combined into a smaller number
of shares (by reverse stock split or

4

 

otherwise), the Exercise Price in effect immediately prior to such combination shall be
proportionately increased.

     3.2 Dividends in Common Stock, Other Stock, Property, Reclassification. If at any time or
from time to time the holders of Common Stock (or shares of any other class of stock or other
securities at the time receivable upon the exercise of this Warrant) shall have received or become
entitled to receive, without payment therefor,

     (a) Common Stock or shares of any other class of stock or other securities which are at any
time directly or indirectly convertible into or exchangeable for Common Stock, or any rights or
options to subscribe for, purchase or otherwise acquire any of the foregoing by way of dividend or
other distribution,

     (b) any cash paid or payable other than a cash dividend, or

     (c) Common Stock or shares of any other class of stock or other securities or property
(including cash) by way of spinoff, split-up, reclassification, combination of shares or similar
corporate rearrangement (other than shares of Common Stock issued pursuant to a stock split or
adjustments covered by Section 3.1 above),

then, and in each such case, the Holder hereof shall, upon the exercise of this Warrant, be
entitled to receive, in addition to the number of shares of Common Stock receivable thereupon, and
without payment of any additional consideration therefor, the amount of stock and other securities
and property (including cash in the cases referred to in clause (b) above and this clause (c))
which such Holder would hold on the date of such exercise had he been the holder of record of such
Common Stock as of the date on which holders of Common Stock received or became entitled to receive
such shares or all other additional stock and other securities and property.

     3.3 Reorganization, Consolidation, Merger or Sale. If any recapitalization or
reorganization of the capital stock of the Company, or any consolidation or merger of the Company
with another corporation, or the sale of all or substantially all of its assets or other
transaction shall be effected in such a way that holders of Common Stock shall be entitled to
receive stock, securities, or other assets or property other than a transaction described in
Sections 3.1 or 3.2 above (an “Organic Change”), then, as a condition of such Organic Change,
lawful and adequate provisions shall be made by the Company whereby the Holder hereof shall
thereafter have the right to purchase and receive (in lieu of the shares of the Common Stock of the
Company immediately theretofore purchasable and receivable upon the exercise of the rights
represented by this Warrant) such shares of stock, securities or other assets or property as may be
issued or payable with respect to or in exchange for a number of outstanding shares of such Common
Stock equal to the number of shares of such stock immediately theretofore purchasable and
receivable upon the exercise of the rights represented by this Warrant. In the event of any Organic
Change, appropriate provision shall be made by the Company with respect to the rights and interests
of the Holder of this Warrant to the end that the provisions hereof (including, without limitation,
provisions for adjustments of the Exercise Price and of the

5

 

number of shares purchasable and receivable upon the exercise of this Warrant) shall
thereafter be applicable, in relation to any shares of stock, securities or assets thereafter
deliverable upon the exercise hereof. Prior to the consummation of any such consolidation, merger
or sale, the successor entity (if other than the Company) resulting from such consolidation or the
corporation purchasing such assets shall assume by written instrument reasonably satisfactory in
form and substance to the Holders executed and mailed or delivered to the registered Holder hereof
at the last address of such Holder appearing on the books of the Company, the obligation to deliver
to such Holder such shares of stock, securities or assets as, in accordance with the foregoing
provisions, such Holder shall be entitled to purchase.

     3.4 Certain Events. If any change in the outstanding Common Stock of the Company or any
other event occurs as to which the other provisions of this Section 3 are not strictly applicable
or, if strictly applicable, would not fairly protect the purchase rights of the Holder of the
Warrant in accordance with such provisions, then the Board of Directors of the Company shall make
an adjustment in the number and class of shares available under the Warrant, the Exercise Price or
the application of such provisions, so as to protect such purchase rights as aforesaid. The
adjustment shall give the Holder of the Warrant upon exercise for the same aggregate Exercise Price
the total number and class of shares as the Holder would have owned had the Warrant been exercised
prior to the event and had the Holder continued to hold such shares until after the event requiring
adjustment.

     3.5 Notices of Change.

     (a) Immediately upon any adjustment in the number or class of shares subject to this Warrant
and/or of the Exercise Price, the Company shall give written notice thereof to the Holder, setting
forth in reasonable detail and certifying the calculation of such adjustment.

     (b) The Company shall give written notice to the Holder at least ten (10) business days prior
to the date on which the Company closes its books or takes a record for determining rights to
receive any dividends or distributions.

     (c) The Company shall also give written notice to the Holder at least ten (10) business days
prior to the date on which an Organic Change shall take place.

     4. ISSUE TAX. The issuance of certificates for shares of Common Stock upon the exercise of
the Warrant shall be made without charge to the Holder of the Warrant for any issue tax (other than
any applicable income taxes) in respect thereof; provided, however, that the Company shall not be
required to pay any tax which may be payable in respect of any transfer involved in the issuance
and delivery of any certificate in a name other than that of the then Holder of the Warrant being
exercised.

6

 

     5. CLOSING OF BOOKS. The Company will at no time close its transfer books against the
transfer of any shares of Common Stock issued or issuable upon the exercise of any warrant in any
manner which interferes with the timely exercise of this Warrant.

     6. NO VOTING OR DIVIDEND RIGHTS; LIMITATION OF LIABILITY. Nothing contained in this
Warrant shall be construed as conferring upon the Holder hereof the right to vote or to consent or
to receive notice as a shareholder of the Company or any other matters or any rights whatsoever as
a shareholder of the Company. No dividends or interest shall be payable or accrued in respect of
this Warrant or the interest represented hereby or the shares purchasable hereunder until, and only
to the extent that, this Warrant shall have been exercised. No provisions hereof, in the absence of
affirmative action by the holder to purchase shares of Common Stock, and no mere enumeration herein
of the rights or privileges of the holder hereof, shall give rise to any liability of such Holder
for the Exercise Price or as a shareholder of the Company, whether such liability is asserted by
the Company or by its creditors.

     7. LEGEND. Each certificate representing shares of Common Stock issuable upon exercise of
the Warrant shall bear a legend substantially in the following form:

“The securities represented by this certificate have not been registered under the
Securities Act of 1933, as amended, and may not be offered, sold or otherwise transferred,
pledged or hypothecated unless and until such securities are registered under such Act or
an opinion of counsel satisfactory to the Company is obtained to the effect that such
registration is not required.”

The foregoing legend shall be removed from the certificates representing any shares of Common Stock
issuable upon exercise of the Warrant, at the request of the holder thereof, at such time as such
shares become eligible for resale pursuant to Rule 144(k) under the 1933 Act.

     8. RIGHTS AND OBLIGATIONS SURVIVE EXERCISE OF WARRANT. Subject to applicable law, the
rights and obligations of the Company, of the holder of this Warrant and of the holder of shares of
Common Stock issued upon exercise of this Warrant, shall survive the exercise of this Warrant.

     9. FURTHER REPRESENTATIONS, WARRANTIES AND COVENANTS OF THE COMPANY.

     (a) Charter and By-Laws. The Company has made available to the Holder true, complete and
correct copies of the Company Charter and By-Laws, each as amended or restated, through the date
hereof.

     (b) Due Authority. The execution and delivery by the Company of this Warrant and the
performance of all obligations of the Company hereunder, including the issuance to the Holder of
the right to acquire the shares of Common Stock, have been duly

7

 

authorized by all necessary corporate action on the part of the Company, and the Warrant is
not inconsistent with the Company Charter or By-Laws, each as amended or restated to date, and
constitutes a legal, valid and binding agreement of the Company, enforceable in accordance with its
terms, subject to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and
similar laws of general applicability relating to or affecting creditors’ rights and to general
equity principles.

     (c) Consents and Approvals. No consent or approval of, giving of notice to, registration
with, or taking of any other action in respect of any state, federal or other governmental
authority or agency is required with respect to the execution, delivery and performance by the
Company of its obligations under this Warrant, except for any filing required by applicable federal
and state securities laws, which filing will be effective by the time required thereby.

     (d) Issuance of Common Stock. The shares of Common Stock issuable upon exercise of this
Warrant will, upon issuance in accordance with the terms of this Warrant, be duly authorized,
validly issued, fully paid and non-assessable.

     (e) Exempt Transaction. Subject to the accuracy of the Holder’s representations in Section
10 hereof, the issuance of the Common Stock upon exercise of this Warrant will constitute a
transaction exempt from (i) the registration requirements of Section 5 of the 1933 Act in reliance
upon Section 4(2) thereof, and (ii) the qualification requirements of the applicable state
securities laws.

     (f) Compliance with Rule 144. At the written request of the Holder who proposes to sell
Common Stock issuable upon the exercise of the Warrant in compliance with Rule 144 promulgated by
the Securities and Exchange Commission, the Company shall furnish to the Holder, within thirty (30)
days after receipt of such request, a written statement as to whether the Company is in compliance
with the filing requirements of the Securities and Exchange Commission as set forth in such Rule,
as such Rule may be amended from time to time.

     10. REPRESENTATIONS AND COVENANTS OF THE HOLDER.

     This Warrant has been entered into by the Company in reliance upon the following
representations and covenants of the Holder:

     (a) Investment Purpose. The Warrant and the Common Stock issuable upon exercise of the
Warrant are being acquired for investment and not with a view to the sale or distribution of any
part thereof, and the Holder has no present intention of selling or engaging in any public
distribution of the same except pursuant to an effective registration statement under the 1933 Act
or an exemption therefrom.

     (b) Private Issue. The Holder understands (i) that neither this Warrant nor the Common
Stock issuable upon exercise of this Warrant has been registered under the 1933

8

 

Act or qualified under applicable state securities laws on the ground that the issuance of
this Warrant and the issuance of the Common Stock upon exercise hereof will be exempt from the
registration and qualifications requirements thereof pursuant to Section 4(2) of the 1933 Act and
any applicable state securities laws, and (ii) that the Company’s reliance on such exemption is
predicated on the representations and covenants set forth in this Section 10.

     (c) Disposition of Holder’s Rights. In no event will the Holder make a disposition of the
Warrant or the Common Stock issuable upon exercise of the Warrant unless and until (i) it shall
have notified the Company of the proposed disposition, and (ii) if requested by the Company, it
shall have furnished the Company with an opinion of counsel (which counsel may either be inside or
outside counsel to the Holder) satisfactory to the Company and its counsel to the effect that (A)
appropriate action necessary for compliance with the 1933 Act has been taken, or (B) an exemption
from the registration requirements of the 1933 Act is available. Notwithstanding the foregoing, the
restrictions imposed upon the transferability of any of its rights to acquire Common Stock or
Common Stock issuable on the exercise of such rights do not apply to transfers from the beneficial
owner of any of the aforementioned securities to its nominee or from such nominee to its beneficial
owner, and shall terminate as to any particular share of Common Stock when (1) such security shall
have been effectively registered under the 1933 Act and sold by the holder thereof in accordance
with such registration or (2) such security shall have been sold without registration in compliance
with Rule 144 under the 1933 Act or (3) a letter shall have been issued to the Holder at its
request by the staff of the Securities and Exchange Commission or a ruling shall have been issued
to the Holder at its request by such Commission stating that no action shall be recommended by such
staff or taken by such Commission, as the case may be, if such security is transferred without
registration under the 1933 Act in accordance with the conditions set forth in such letter or
ruling and such letter or ruling specifies that no subsequent restrictions on transfer are
required. Whenever the restrictions imposed hereunder shall terminate, as hereinabove provided, the
Holder or holder of a share of Common Stock then outstanding as to which such restrictions have
terminated shall be entitled to receive from the Company, without expense to such holder, one or
more new certificates for such shares of Common Stock not bearing any restrictive legend.

     (d) Financial Risk. The Holder has such knowledge and experience in financial and business
matters as to be capable of evaluating the merits and risks of its investment and has the ability
to bear the economic risks of its investment.

     (e) Risk of No Registration. The Holder understands that if the Company does not register
the Common Stock with the Securities and Exchange Commission pursuant to Section 12 of the
Securities Exchange Act of 1934 (the “1934 Act”), or if a registration statement covering the
Warrant or the Common Stock issuable upon exercise hereof under the 1933 Act is not in effect when
the Holder desires to sell (i) the Warrant or (ii) the Common Stock issuable upon exercise of the
Warrant, it may be required to hold such securities for an indefinite period. The Holder also
understands that any sale of the

9

 

Warrant or the Common Stock issuable upon exercise of the Warrant which might be made by it in
reliance upon Rule 144 under the 1933 Act may be made only in accordance with the terms and
conditions of that Rule.

     (f) Accredited Investor. The Holder is an “accredited investor” within the meaning of Rule
501 of Regulation D under the 1933 Act, as presently in effect.

     11. MODIFICATION AND WAIVER. This Warrant and any provision hereof may be changed, waived,
discharged or terminated only by an instrument in writing signed by the party against which
enforcement of the same is sought.

     12. NOTICES. Any notice, request or other document required or permitted to be given or
delivered to the holder hereof or the Company shall be delivered or shall be sent by an established
overnight service provider, or registered or certified mail, postage prepaid, to each such holder
at its address as shown on the books of the Company or to the Company at the address indicated
therefor in the first paragraph of this Warrant or such other address as either may from time to
time provide to the other in accordance with this Section.

     13. BINDING EFFECT ON SUCCESSORS. This Warrant shall be binding upon any entity succeeding
the Company by merger, consolidation or acquisition of all or substantially all of the Company’s
assets. Subject to applicable law, all of the obligations of the Company relating to the Common
Stock issuable upon the exercise of this Warrant shall survive the exercise and termination of this
Warrant. All of the covenants and agreements of the Company shall inure to the benefit of the
successors and assigns of the Holder.

     14. DESCRIPTIVE HEADINGS AND GOVERNING LAW. The description headings of the several
sections and paragraphs of this Warrant are inserted for convenience only and do not constitute a
part of this Warrant. This Warrant shall be construed and enforced in accordance with, and the
rights of the parties shall be governed by, the laws of the State of New York, without giving
effect to principles of conflicts of laws.

     15. LOST WARRANTS. The Company represents and warrants to the Holder hereof that upon
receipt of evidence reasonably satisfactory to the Company of the loss, theft, destruction, or
mutilation of this Warrant and, in the case of any such loss, theft or destruction, upon receipt of
an indemnity reasonably satisfactory to the Company, or in the case of any such mutilation upon
surrender and cancellation of such Warrant, the Company, at its expense, will make and deliver a
new Warrant, of like tenor, in lieu of the lost, stolen, destroyed or mutilated Warrant.

     16. FRACTIONAL SHARES. No fractional shares shall be issued upon exercise of this Warrant.
The Company shall, in lieu of issuing any fractional share, pay the holder

10

 

entitled to such fraction a sum in cash equal to such fraction multiplied by the then
effective Exercise Price.

[Signature page follows]

11

 

     IN WITNESS WHEREOF, the undersigned have caused this Warrant to be duly executed by their
authorized officers on the date and year first written above.

	 	 	 	 	 
	 	THOMAS WEISEL PARTNERS
 GROUP, INC.

 	 
	 	By:  	 	 
	 	Name:  	 	 	 
	 	Title:  	 	 	 
	 

Attest:

	 	 	 	 	 
	 	 	 	 	 
	 

Name:

	 	 	 	 
	Title:
	 	 	 	 

	 	 	 	 	 
	Acknowledged and Agreed to:	 	 
	 
	 	 	 	 
	NOMURA AMERICA INVESTMENT, INC.	 	 
	 
	 	 	 	 
	By:
	 	 	 	 
	 

	 	 	 	 
	Name:	 	 
	Title:	 	 

12

 

Annex A 

SUBSCRIPTION FORM

Date:                    , 200__

Thomas Weisel Partners Group, Inc.

One Montgomery Street

San Francisco, California 94104

Attn:                                         

Ladies and Gentlemen:

	 
	o    The undersigned hereby elects to exercise the warrant issued to it by
Thomas Weisel Partners Group, Inc. (the “Company”) with an effective
date of
                    , 200___ (the “Warrant”) and to purchase thereunder
                                        shares of the Common Stock of the Company
(the “Shares”) at a purchase price of                    
                                        
Dollars ($                    ) per
Share or an aggregate purchase price of
                                        
Dollars ($                    ) (the “Exercise
Price”). Pursuant to the terms of the Warrant, the undersigned has
delivered the Exercise Price herewith in full in cash or by certified
check or wire transfer.

	 

	o    The undersigned hereby elects to convert                                        
percent (                     %) of the value of the Warrant pursuant to the
provisions of Section 1.2 of the Warrant.

Please issue a certificate or certificates representing said shares of Common Stock in the name of
the undersigned or in such other name as specified below:

	 	 	 	 	 	 	 	 	 
	 

	 	Name:
	 	 	 	 	 	 
	 	 	 	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	 	 	Address:	 	 	 	 
	 

	 	 	 	 	 	 	 	 

	 	 	 	 	 	 	 
	 	 	Very truly yours,	 	 
	 
	 	 	 	 	 	 
	 	 	NOMURA AMERICA	 	 
	 	 	INVESTMENT, INC.	 	 
	 
	 	 	 	 	 	 
	 

	 	By:	 	 	 	 
	 

	 	 	 	 	 	 
	 	 	Name:	 	 
	 	 	Title:	 	 

13

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