Document:

exv10w1

EXHIBIT 10.1

EXECUTION COPY

ESCROW AGREEMENT

     This Escrow Agreement (this “Escrow Agreement”), dated as of June  , 2008, is
entered into by and among Mobile Mini, Inc., a Delaware corporation (“Parent”), Welsh,
Carson, Anderson & Stowe X, L.P., a Delaware limited partnership, as Target Stockholder
Representative (the “Stockholder Representative”, together with Parent, the “Other
Parties”), and Wells Fargo Bank, N.A., as escrow agent (the “Escrow Agent”).

W I
T N E S S E T H:

     WHEREAS, reference is hereby made to that certain Agreement and Plan of Merger dated February
22, 2008 (the “Merger Agreement”), entered into by and among Parent, MSG WC Holdings Corp.,
a Delaware corporation (“Target”), and the Stockholder Representative, solely for the
purposes of representing the Target Stockholders in accordance with the Merger Agreement, that
provides for, among other transactions, the merger of Target with and into the Parent, with the
Parent continuing as the surviving company, as more fully set forth in the Merger Agreement.
Capitalized terms used but not otherwise defined herein shall have respective the meanings given to
such terms in the Merger Agreement, a copy of which is attached hereto as Exhibit C;

     WHEREAS, Section 3.3 of the Merger Agreement provides that the Merger Consideration is subject
to certain post-Closing adjustments;

     WHEREAS, Article XI of the Merger Agreement provides that the Target Stockholders are
obligated to indemnify Parent Indemnitee under certain circumstances;

     WHEREAS, pursuant to Section 3.3(d) of the Merger Agreement, (i) an amount of $2,811,659.79 in
cash (the “Escrow Amount”, and together with all interest and other amounts from time to
time held by the Escrow Agent under this Escrow Agreement, the “Escrow Funds”)) and (ii)
677,130.01 shares of Series A Convertible Redeemable Participating Preferred Stock, par value $0.01
per share, of Parent (the “Shares”, and together with all other shares issued on, in
respect of, upon conversion of, or in substitution of the Shares according to Section 4.4,
the “Escrowed Shares”)) are being delivered to the Escrow Agent on the date of this Escrow
Agreement;

     WHEREAS, the Escrow Funds and the Escrowed Shares, collectively, are referred to herein as the
“Escrowed Property”; and

     WHEREAS, the Other Parties have requested the Escrow Agent to act in the capacity of escrow
agent under this Escrow Agreement, and the Escrow Agent, subject to the terms and conditions
hereof, has agreed so to do.

     NOW, THEREFORE, in consideration of the premises and mutual covenants and agreements contained
herein, the parties hereto hereby agree as follows:

 

 

ARTICLE I

RECEIPT AND RETENTION OF THE ESCROW PROPERTY

     Section 1.1 The Other Parties each hereby appoints the Escrow Agent to act as agent and
custodian for the Escrowed Property for their respective benefit pursuant to the terms of this
Escrow Agreement, and the Escrow Agent hereby accepts such appointment pursuant to such terms.

     Section 1.2 The Escrow Agent hereby acknowledges receipt of the Escrowed Property.

     Section 1.3 The Escrowed Property shall be retained, managed and disbursed by the Escrow Agent
strictly in accordance with the terms and conditions of this Escrow Agreement. The Escrow Agent
shall not transfer, assign, loan, convert, reinvest, or otherwise dispose of any Escrowed Property
but shall hold the Escrowed Property in accordance with this Escrow Agreement until the
disbursement thereof pursuant to Article IV or Section 5.6.

ARTICLE II

INVESTMENT

     Section 2.1 At the written direction of the Stockholder Representative, pursuant to the
attached Exhibit D, the Escrow Agent will invest (and reinvest) the Escrow Funds in one or more of:
(i) direct obligations of and obligations fully guaranteed by the United States of America, or any
agency thereof, the principal and interest of which are guaranteed by the United States of America
or its agencies; (ii) participation under a revolving repurchase agreement maintained by the Escrow
Agent with other entities relative to an agreement for the sale and repurchase of obligations
listed in item (i) above; (iii) any time deposit which is fully insured by the Federal Deposit
Insurance Corporation; (iv) commercial paper notes which, at the time of investment, are rated in
one of the two highest credit ratings by Moody’s Investors Service, Inc. and/or Standard & Poor’s
Corporation; (v) certificates of deposit of any bank organized under the laws of the United States;
or (vi) any money market fund (including money market funds for which the Escrow Agent serves in an
advisory capacity and/or other money market funds with which the Escrow Agent has an existing
relationship), the assets of which are any of those obligations listed in items (i) through (vi)
above (collectively, the “Permitted Investments”).

     Section 2.2 The Escrow Agent is hereby authorized to execute the purchase and sale of
Permitted Investments as directed by the Stockholder Representative, in writing, through the
facilities of its own trading or capital markets operations or those of any affiliated entity. In
the event that the Escrow Agent does not receive investment instructions to invest the Escrow
Funds, the Escrow Agent shall invest such funds in direct obligations of and obligations fully
guaranteed by the United States of America, or any agency thereof, the principal and interest of
which are guaranteed by the United States of America or its agencies. The Escrow Agent can
liquidate any investment in order to comply with disbursement instructions without any liability
for any resulting loss. Any loss incurred from an investment will be borne by the Escrow Funds.
The Stockholder Representative and the Parent acknowledge that the Escrow Agent is not providing
investment supervision, recommendations or advice.

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     Section 2.3 All income earned with respect to any Permitted Investment shall be delivered from
time to time, but at least quarterly, to the Stockholder Representative for distribution to the
Target Stockholders.

ARTICLE III

TAXES

     Section 3.1 The Other Parties agree that, for United States federal, state, local and other
tax purposes, all taxable interest, dividends and other income, if any, attributable to the
Escrowed Property or any other amount held in escrow by the Escrow Agent pursuant to this Escrow
Agreement shall be allocable to the Target Stockholders.

     Section 3.2 The Escrow Agent shall report to the United States Internal Revenue Service (the
“IRS”) and to each Target Stockholder, as of each calendar year-end, all income, if any,
attributable to the Escrowed Property or any other amount held in escrow by the Escrow Agent
pursuant to this Escrow Agreement, as and to the extent required under the provisions of the
Internal Revenue Code of 1986, as amended (the “Code”), on IRS Form 1099 or other
applicable form.

     Section 3.3 The Escrow Agent shall make payments of income earned on the Escrow Funds as
provided for in this Escrow Agreement. Prior to closing, each such payee shall provide to the
Escrow Agent an IRS Form W-9, for tax identification number certification, or an applicable Form
W-8, for certification that such payee is not a “United States person” within the meaning of the
Code, as appropriate and such other forms and documents as the Escrow Agent may request. The Other
Parties and the Target Stockholders understand that if such tax reporting documentation is not
provided and certified to the Escrow Agent, the Escrow Agent may be required by the Code, and the
Regulations promulgated thereunder, to withhold a portion of any interest or other income earned on
the investment of the Escrowed Property.

     Section 3.4 The Other Parties intend that the Target Stockholders shall be treated as the
owners of the Escrowed Shares for all United States federal, state and local tax purposes (except
to the extent that any such Escrowed Shares are disbursed to Parent pursuant to Article
IV), and none of the parties shall take any actions or positions that are inconsistent with
such treatment.

ARTICLE IV

DISBURSEMENT OF THE ESCROW PROPERTY; SUBSTITUTION

     Section 4.1 The Escrow Agent shall make disbursements of the Escrowed Property upon receipt of
and in accordance with (a) a joint written instruction (“Joint Instruction”) signed by
authorized signers of both Parent and the Stockholder Representative evidenced in Exhibits B-1 and
B-2, respectively, directing delivery of all or a portion of the Escrowed Property, or (b) an order
from a court of competent jurisdiction that orders such disbursement, together with an opinion of
counsel to the effect that such order is final and not subject to further appeal (collectively, the
“Court Order”).

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     Section 4.2 Notwithstanding anything herein to the contrary:

          (a) To the extent the Escrowed Property has not been fully disbursed on or prior to the date
that is twelve (12) months from the date of this Escrow Agreement (the “Escrow Release
Date”), the Escrow Agent shall disburse within two (2) Business Days after such date to the
Stockholder Representative the remaining Escrowed Property minus the Retained Property.
The Escrow Agent shall retain the Retained Property and shall only release the Retained Property in
accordance with Section 4.1 above.

          (b) For purposes of this Article IV, the following terms shall have the following
meanings:

     “Retained Property” means the amount of cash and/or the number Shares set forth in a
certificate of the Chief Financial Officer of Parent delivered to the Escrow Agent and the Target
Shareholder Representative at least two (2) Business Days prior to the Escrow Release Date, which
certificate shall set forth Parent’s good faith estimate of the aggregate amount of all pending
indemnification claims of Parent under the Merger Agreement as of the date of such certificate.
Such certificate shall contain Parent’s good faith calculation of the Fair Market Value (as defined
in the Merger Agreement) of the Shares as of the date of such certificate.

     Section 4.3 Whenever a partial release of the Escrowed Shares is anticipated, Parent shall,
upon request by the Escrow Agent, promptly cause the Parent’s Secretary to reissue the stock
certificates of the Escrowed Shares in the number of certificates necessary so as to enable such
partial release.

ARTICLE V

PROVISIONS RELATING TO THE ESCROW AGENT

     Section 5.1 The Escrow Agent shall have no duties or responsibilities whatsoever with respect
to the Escrowed Property except as are specifically set forth herein. The Escrow Agent shall
neither be responsible for or under, nor chargeable with knowledge of the terms and conditions of,
any other agreement, instrument or document in connection herewith, including without limitation
the Merger Agreement. The Escrow Agent may conclusively rely upon, and shall be fully protected
from all liability, loss, cost, damage or expense in acting or omitting to act pursuant to any
written notice, instrument, request, consent, certificate, document, letter, opinion, order,
resolution or other writing hereunder that is in a form and manner consistent with the requirements
set forth in this Escrow Agreement without being required to determine the authenticity of such
document, the correctness of any fact stated therein, the propriety of the service thereof or the
capacity, identity or authority of any party purporting to sign or deliver such document. The
Escrow Agent shall have no responsibility for the contents of any such writing contemplated herein
and may rely without any liability upon the contents thereof. Concurrently with the execution of
this Escrow Agreement, the Other Parties shall deliver to the Escrow Agent authorized signers’
forms in the form of Exhibit B-1 and Exhibit B-2 to this Escrow Agreement.

The Escrow Agent shall not be liable for any action taken or omitted by it in good faith and
reasonably believed by it to be authorized hereby or within the rights or powers conferred upon it

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hereunder, nor for action taken or omitted by it in good faith, and in accordance with advice of
counsel (which counsel may be of the Escrow Agent’s own choosing), and shall not be liable for any
mistake of fact or error of judgment or for any acts or omissions of any kind except for its own
willful misconduct or gross negligence. The Parties, jointly and severally, shall indemnify,
defend and hold harmless the Escrow Agent from and against any and all loss, liability, cost,
damage and expense, including, without limitation, attorneys’ fees and expenses or other
professional fees and expenses which the Escrow Agent may suffer or incur by reason of any action,
claim or proceeding brought against the Escrow Agent, arising out of or relating in any way to this
Escrow Agreement or any transaction to which this Escrow Agreement relates, unless such loss,
liability, cost, damage or expense shall have been finally adjudicated to have been directly caused
by the willful misconduct or gross negligence of the Escrow Agent. The provisions of this Section
5.1 shall survive the resignation or removal of the Escrow Agent and the termination of this Escrow
Agreement.

THE ESCROW AGENT SHALL NOT BE LIABLE, DIRECTLY OR INDIRECTLY, FOR ANY (I) DAMAGES, LOSSES OR
EXPENSES ARISING OUT OF THE SERVICES PROVIDED HEREUNDER, OTHER THAN DAMAGES, LOSSES OR EXPENSES
WHICH HAVE BEEN FINALLY ADJUDICATED TO HAVE DIRECTLY RESULTED FROM THE ESCROW AGENT’S GROSS
NEGLIGENCE OR WILLFUL MISCONDUCT, OR (II) SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR LOSSES OF
ANY KIND WHATSOEVER (INCLUDING WITHOUT LIMITATION LOST PROFITS), EVEN IF THE ESCROW AGENT HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH LOSSES OR DAMAGES AND REGARDLESS OF THE FORM OF ACTION.

     Section 5.2 The Escrow Agent may resign as such following the giving of sixty (60) days’ prior
written notice to each of the Other Parties. Similarly, the Escrow Agent may be removed and
replaced following the giving of sixty (60) days’ prior written notice to the Escrow Agent jointly
by the Other Parties. In either event, the duties of the Escrow Agent shall terminate sixty (60)
days after the date of such notice (or at such earlier date as may be mutually agreeable), except
for its obligations to hold and deliver the Escrowed Property to the successor Escrow Agent; and
the Escrow Agent shall then deliver the balance of the Escrowed Property then in its possession to
such a successor Escrow Agent as shall be appointed by the Other Parties as evidenced by Joint
Instructions delivered to the Escrow Agent. Upon acknowledgment by any successor Escrow Agent of
the receipt of the then remaining Escrowed Property (or the deposit or delivery of the Escrowed
Property by the Escrow Agent pursuant to Section 5.4 below), the then acting Escrow Agent
shall be fully released and relieved of all duties, responsibilities and obligations under this
Escrow Agreement.

     Section 5.3 The Escrow Agent shall be under no duty to institute or defend any arbitration or
legal proceeding with respect to the Escrowed Property or under this Escrow Agreement and none of
the costs or expenses of any such proceeding shall be borne by the Escrow Agent. The costs and
expenses of any such proceeding shall be borne as decided by the arbitrators or court and shall be
direct obligations of the Other Parties, as the case may be, and shall not be satisfied in any way
by the Escrowed Property.

     Section 5.4 Should any controversy arise involving the parties hereto or any of them or any
other person with respect to this Escrow Agreement or the Escrowed

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Property, or should a substitute escrow agent fail to be designated as provided in Section
5.2 hereof, or if the Escrow Agent should be in doubt as to what action to take, the Escrow
Agent shall have the right, but not the obligation, either to (a) withhold delivery of the Escrowed
Property until the controversy is resolved, the conflicting demands are withdrawn or its doubt is
resolved, (b) deposit all Escrowed Property into the registry of any court of competent
jurisdiction and notify the Other Parties of such deposit, and thereupon the Escrow Agent shall be
discharged from all further duties and responsibilities as Escrow Agent under this Escrow Agreement
or (c) file an interpleader action in any court of competent jurisdiction, and upon the filing
thereof and deposit of all Escrowed Property into the registry of such court, the Escrow Agent
shall be relieved of all liability as to the Escrowed Property and shall be entitled to recover
from the losing party of such action reasonable attorneys’ fees, expenses and other costs incurred
in commencing and maintaining any such interpleader action.

ARTICLE VI

NOTICES

     Section 6.1 All notices, consents, requests, demands, waivers and other communications
required or permitted to be given under this Escrow Agreement shall be in writing and shall be
deemed to have been duly given if delivered in person or mailed, certified or registered mail with
postage prepaid, or sent by reputable overnight courier or facsimile (upon confirmation of
receipt), as follows:

	 	(a)	 	If to the Escrow Agent:

Wells Fargo Bank, N.A.

Corporate Municipal & Escrow Solutions

MAC S4101-22E

100 West Washington Street, 22nd Floor

Phoenix, AZ 85003

Phone: 602-378-2305

Facsimile: 602-378-2333

	 	(b)	 	If to Parent:

Mobile Mini, Inc.

7420 South Kyrene Road, Suite 101

Tempe, AZ 85283

Fax: (480) 894-6433

Attn: Larry Trachtenberg

	 	 	with a copy (which shall not constitute notice) to:

White & Case LLP

1155 Avenue of the Americas

New York, NY 10036

Fax: (212) 354-8113

Attn: John M. Reiss, Esq.

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          Daniel M. Latham, Esq.

	 	(c)	 	If to the Stockholder Representative:

Welsh, Carson, Anderson & Stowe X, L.P.

320 Park Avenue

Suite 2500

New York, NY 10022

Fax: (212) 893-9575

Attn: Sanjay Swani

          Michael Donovan

	 	with a copy (which shall not constitute notice) to:

Kirkland & Ellis LLP

153 East 53rd Street

New York, NY 10022

Fax: (212) 446-6460

Attn: Michael Movsovich, Esq.

or to such other person or address as any party shall specify by notice in writing in accordance
with this Section 6.1 to each of the other parties. All such notices, requests, demands,
waivers and communications shall be deemed to have been received on the date of delivery unless if
mailed, in which case on the third (3rd) Business Day after the mailing thereof, except for a
notice of a change of address, which shall be effective only upon receipt thereof.

ARTICLE VII

COMPENSATION; EXPENSES

     Section 7.1 The Escrow Agent shall be entitled to payment of customary fees and expenses for
all services rendered by it hereunder in accordance with Exhibit A attached hereto (as such
schedule may be amended from time to time), payable on the Closing Date. After the Closing Date,
the Escrow Agent shall be entitled to annual fees in accordance with Exhibit A. All fees
and expenses owed to the Escrow Agent pursuant to this Article VII shall be paid 50% by
Parent and 50% by the Stockholder Representative.

ARTICLE VIII

TERM

     Section 8.1 This Escrow Agreement shall terminate upon the disbursement, in accordance with
Article IV or Section 5.6 hereof, of the Escrowed Property in full;
provided, however, that the rights of the Escrow Agent and the obligations of the
other parties hereto under Article V and Article VII shall survive the termination
thereof and the resignation or removal of the Escrow Agent.

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ARTICLE IX

DESIGNEES FOR INSTRUCTIONS

     Section 9.1 An Other Party may, by notice to the Escrow Agent and the other Other Party,
designate one or more persons who will execute notices and from whom the Escrow Agent may take
instructions hereunder. Such designations may be changed from time to time upon written notice to
the Escrow Agent from such Other Party. The Escrow Agent will be entitled to rely conclusively on
any notices or instructions from any person so designated by an Other Party.

ARTICLE X

MISCELLANEOUS

     Section 10.1 No amendment, modification or waiver in respect of this Escrow Agreement shall be
effective unless it shall be in writing and signed by all parties hereto.

     Section 10.2 This Escrow Agreement and the rights and obligations hereunder shall not be
assignable or transferable by a party hereto without the prior written consent of the other parties
hereto; provided, however, that any banking association or corporation into which
the Escrow Agent may be merged, converted or with which the Escrow Agent may be consolidated, or
any corporation resulting from any merger, conversion or consolidation to which the Escrow Agent
shall be a party, or any banking association or corporation to which all or substantially all of
the corporate trust business of the Escrow Agent shall be transferred, shall succeed to all the
Escrow Agent’s rights, obligations and immunities hereunder without the execution or filing of any
paper or any further act on the part of any of the parties hereto, anything herein to the contrary
notwithstanding. Any attempted assignment in violation of this Section 10.2 shall be void
ab initio.

     Section 10.3 If any term, provision, covenant or restriction contained in this Escrow
Agreement is held by a court of competent jurisdiction or other authority to be invalid, void,
unenforceable or against its regulatory policy, the remainder of the terms, provisions, covenants
and restrictions contained in this Escrow Agreement shall remain in full force and effect and shall
in no way be affected, impaired or invalidated, and this Escrow Agreement shall be reformed,
construed and enforced in such jurisdiction as if such invalid, illegal or unenforceable term,
provision, covenant or restriction or any portion thereof had never been contained herein.

     Section 10.4 This Escrow Agreement, including the Exhibits hereto and the documents and
instruments and other agreements specifically referred to herein or delivered pursuant hereto,
contains the entire understanding of the parties hereto with respect to the subject matter
contained herein and supersedes all prior agreements and understandings, oral and written, with
respect thereto. The Escrow Agent is bound only by the terms of this Escrow Agreement.

     Section 10.5 THIS ESCROW AGREEMENT AND THE LEGAL RELATIONS BETWEEN THE PARTIES HERETO SHALL BE
GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

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THE STATE OR FEDERAL COURTS LOCATED WITHIN THE STATE OF NEW YORK SHALL HAVE EXCLUSIVE
JURISDICTION OVER ANY AND ALL DISPUTES BETWEEN THE PARTIES HERETO, WHETHER IN LAW OR EQUITY,
ARISING OUT OF OR RELATING TO THIS ESCROW AGREEMENT AND THE PARTIES CONSENT TO AND AGREE TO SUBMIT
TO THE EXCLUSIVE JURISDICTION OF SUCH COURTS. EACH OF THE PARTIES HEREBY WAIVES AND AGREES NOT TO
ASSERT IN ANY SUCH DISPUTE, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY CLAIM THAT (I)
SUCH PARTY IS NOT PERSONALLY SUBJECT TO THE JURISDICTION OF SUCH COURTS, (II) SUCH PARTY AND SUCH
PARTY’S PROPERTY IS IMMUNE FROM ANY LEGAL PROCESS ISSUED BY SUCH COURTS OR (III) ANY LITIGATION OR
OTHER PROCEEDING COMMENCED IN SUCH COURTS IS BROUGHT IN AN INCONVENIENT FORUM. THE PARTIES HEREBY
AGREE THAT MAILING OF PROCESS OR OTHER PAPERS IN CONNECTION WITH ANY SUCH ACTION OR PROCEEDING IN
THE MANNER PROVIDED IN SECTION 6.1, OR IN SUCH OTHER MANNER AS MAY BE PERMITTED BY LAW,
SHALL BE VALID AND SUFFICIENT SERVICE THEREOF AND HEREBY WAIVE ANY OBJECTIONS TO SERVICE
ACCOMPLISHED IN THE MANNER HEREIN PROVIDED.

     Section 10.6 Each of the parties to this Escrow Agreement hereby irrevocably waives all right
to a trial by jury in any action, proceeding or counterclaim arising out of or relating to this
Escrow Agreement or the transactions contemplated hereby.

     Section 10.7 This Escrow Agreement shall be binding on and shall inure to the benefit of the
parties hereto and their successors and permitted assigns. This Escrow Agreement is for the sole
benefit of the parties hereto and their successors and permitted assigns and nothing herein
expressed or implied shall give or be construed to give to any person, other than the parties
hereto and such successors and assigns, any legal or equitable rights hereunder. Nothing herein is
intended or shall be construed to give any other person (including, without limitation, any
creditors of the Escrow Agent or the Other Parties) any right, remedy or claim under, in or with
respect to the Escrowed Property held hereunder.

     Section 10.8 This Escrow Agreement may be executed in one or more counterparts (including by
facsimile or electronic means), all of which shall be considered one and the same agreement, and
shall become effective when one or more such counterparts have been signed by each of the parties
and delivered to the other party.

     Section 10.9 Construction. In this Escrow Agreement, unless the context otherwise requires:

     (a) any reference in this Agreement to “writing” or comparable expressions includes a
reference to facsimile transmission or comparable means of communication;

     (b) words expressed in the singular number shall include the plural and vice versa, words
expressed in the masculine shall include the feminine and neuter gender and vice versa;

     (c) references to Articles, Sections, Exhibits and Recitals are references to articles,
sections, exhibits, schedules and recitals of this Agreement;

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     (d) reference to “day” or “days” are to calendar days;

     (e) this “Escrow Agreement” or any other agreement or document shall be construed as a
reference to this Agreement or, as the case may be, such other agreement or document as the same
may have been, or may from time to time be, amended, varied, novated or supplemented; and

     (f) “include,” “includes,” and “including” are deemed to be followed by “without limitation”
whether or not they are in fact followed by such words or words of similar import.

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     IN WITNESS WHEREOF, the parties hereto have executed and delivered this Escrow Agreement as of
the day and year first above written.

ESCROW AGENT:

	 	 	 	 	 	 	 
	 	 	Wells Fargo Bank, as Escrow Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:
	 	/s/ Jeffrey B. Kassels
 

Jeffrey B. Kassels
	 	 
	 

	 	Title:
	 	Vice President	 	 

PARENT:

	 	 	 	 	 	 	 
	 	 	Mobile Mini, Inc.	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:
	 	/s/ Lawrence Trachtenberg
 

Lawrence Trachtenberg
	 	 
	 

	 	Title:
	 	Executive Vice President	 	 

STOCKHOLDER REPRESENTATIVE:

	 	 	 	 	 	 	 
	 	 	Welsh, Carson, Anderson & Stowe X, L.P.	 	 
	 
	 	 	 	 	 	 
	 	 	By: WCAS X Associates LLC, its General Partner	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:
	 	/s/ Sanjay Swani
 

Sanjay Swani
	 	 
	 

	 	Title:
	 	Vice President	 	 

[SIGNATURE PAGE TO ESCROW AGREEMENT]

 

 

EXHIBIT A

Escrow Agent’s Fee Schedule

to act as ESCROW AGENT for the

Mobile Mini, Inc. Indemnity Escrow

			
	 	 	 
	Acceptance Fee:
	 	$750.00

Initial Fees as they relate to Wells Fargo Bank acting in the capacity of Escrow Agent — includes
review of the Escrow Agreement; acceptance of the Escrow appointment; setting up of Escrow
Account(s) and accounting records; and coordination of receipt of funds for deposit to the Escrow
Account(s).

Acceptance Fee payable at time of Escrow Agreement execution.

			
	 	 	 
	Escrow Agent Annual Administration Fee:
	 	$1,500.00

For ordinary administrative services by Escrow Agent — includes daily routine account management;
investment transactions; cash transaction processing (including wire and check processing);
monitoring claim notices pursuant to the agreement; disbursement of funds in accordance with the
agreement; and mailing of trust account statements to all applicable parties.

Tax reporting is included for up to Five (5) entities. Should additional reporting be necessary, a
$25 per reporting charge will be assessed.

This fee is payable in advance, with the first installment due at the time of Escrow Agreement
execution. The Annual Fee covers a full year or any part thereof, and therefore will not be
prorated or refunded in the year of early termination.

Wells Fargo’s bid is based on the following assumptions:

	•	 	Number of Escrow Accounts to be established: One (1)
	 
	•	 	Number of Deposits to Escrow Account: Not more than One (1)
	 
	•	 	Number of Withdrawals from Escrow Fund: Not more than Ten (10)
	 
	•	 	Term of Escrow: Not more than One (1) year
	 
	•	 	APPOINTMENT SUBJECT TO RECEIPT OF REQUESTED DUE DILIGENCE INFORMATION AS PER THE USA
PATRIOT ACT
	 
	•	 	THIS PROPOSAL ASSUMES THAT BALANCES IN ESCROW ACCOUNT WILL BE INVESTED IN WELLS FARGO
ADVANTAGE MONEY MARKET FUNDS
	 
	•	 	ALL FUNDS WILL BE RECEIVED FROM OR DISTRIBUTED TO A DOMESTIC OR AN APPROVED FOREIGN ENTITY
	 
	•	 	IF THE ACCOUNT(S) DOES NOT OPEN WITHIN THREE (3) MONTHS OF THE DATE SHOWN BELOW, THIS
PROPOSAL WILL BE DEEMED TO BE NULL AND VOID

	 	 	 
	 
	 	 
	Out-of Pocket Expenses:

	 	At Cost

We will charge for out-of-pocket expenses in response to specific tasks assigned by the client or
provided for in the escrow agreement. Possible expenses would be, but are not limited to, express
mail and messenger charges, travel expenses to attend closing or other meetings. There are no
charges for indirect out-of- pocket expenses.

This fee schedule is based upon the assumptions listed above which pertain to the responsibilities
and risks involved in Wells Fargo undertaking the role of Escrow Agent. These assumptions are
based on information provided to us as of the date of this fee schedule. Our fee schedule is
subject to review and acceptance of the final documents. Should any of the assumptions, duties or
responsibilities change, we reserve the right to affirm, modify or rescind our fee schedule.
Extraordinary services (services other than the ordinary administration services of Escrow Agent
described above) are not included in the annual administration fee and will be billed as incurred
at the rates in effect from time to time.

Submitted on: 06/09/08

 

 

EXHIBIT B-1

CERTIFICATE AS TO AUTHORIZED SIGNATURES OF PARENT

     Account Name:

The specimen signatures shown below are the specimen signatures of the individuals who have been
designated as Authorized Representatives of Mobile Mini, Inc. and are authorized to initiate and
approve transactions of all types for the above-mentioned account on behalf of Parent.

	 	 	 	 	 
	Name / Title	 	Specimen Signature	 	 
	 
	 	 	 	 
	Larry Trachtenberg

	 	/s/ Larry Trachtenberg	 	 
	 
	 	 	 	 
	 

Name

	 	 

Signature
	 	 
	 
	 	 	 	 
	Chief Financial Officer
	 	 	 	 
	 
	 	 	 	 
	 

Title

	 	 	 	 
	 
	 	 	 	 
	Christopher Miner

	 	/s/ Christopher Miner	 	 
	 
	 	 	 	 
	 

Name

	 	 

Signature
	 	 
	General Counsel
	 	 	 	 
	 
	 	 	 	 
	 

Title

	 	 	 	 

 

 

EXHIBIT B-2

CERTIFICATE AS TO AUTHORIZED SIGNATURES

OF STOCKHOLDER REPRESENTATIVE

     Account Name:

The specimen signatures shown below are the specimen signatures of the individuals who have been
designated as the Authorized Representatives of the Stockholder Representative and are authorized
to initiate and approve transactions of all types for the above-mentioned account on behalf of the
Stockholder Representative.

	 	 	 	 	 
	 	 	Specimen Signature	 	 
	Jonathan Rather

	 	/s/ Jonathan Rather	 	 
	 
	 	 	 	 
	 

Name

	 	 

Signature
	 	 
	 
	 	 	 	 
	Managing Member
	 	 	 	 
	 
	 	 	 	 
	 

Title

	 	 	 	 
	 
	 	 	 	 
	Sanjay Swani

	 	/s/ Sanjay Swani	 	 
	 
	 	 	 	 
	 

Name

	 	 

Signature
	 	 
	 
	 	 	 	 
	Managing Member
	 	 	 	 
	 
	 	 	 	 
	 

Title

	 	 	 	 
	 
	 	 	 	 
	Michael Donovan

	 	/s/ Michael Donovan	 	 
	 
	 	 	 	 
	 

Name

	 	 

Signature
	 	 
	 
	 	 	 	 
	Additional Member
	 	 	 	 
	 
	 	 	 	 
	 

Title

	 	 	 	 
	 
	 	 	 	 
	 

Name

	 	 

Signature
	 	 
	 
	 	 	 	 
	 

Title

	 	 	 	 

 

 

EXHIBIT C

Agreement and Plan of Merger, dated as of February 22, 2008,
among Mobile Mini, Inc., Cactus Merger Sub, Inc., 

MSG WC Holdings
Corp. and Welsh, Carson, Anderson & Stowe X, L.P.

Incorporated
by reference to Exhibit 2.1 to Mobile Mini, Inc.’s Form 8-K
filed on February 28, 2008.

 

 

EXHIBIT D

INVESTMENT DIRECTION

Direction for Investment of Cash Balances

Wells Fargo Advantage Funds

Direction to use Wells Fargo Advantage Funds for Cash Balances for the following account(s):

Account
Name:

Account Number(s):

You are hereby directed to invest, as indicated below or as I shall direct further from time to
time, all cash in the Account in the following money market portfolio of Wells Fargo Advantage
Funds (the “Fund”) or another permitted investment of my choice (Check One):

o Wells Fargo Advantage Funds, 100% Treasury Money Market Fund

þ Wells Fargo Advantage Funds, Government Money Market Fund

o Wells Fargo Advantage Funds, Cash Investment Money Market Fund

o Wells Fargo Advantage Funds, Prime Investment Money Market Fund

o Wells Fargo Advantage Funds, Treasury Plus Money Market Fund

o Wells Fargo Advantage Funds, Heritage Money Market Fund

o Wells Fargo Advantage Funds, National Tax-Free Money Market Fund

I acknowledge that I have received, at my request, and reviewed the Fund’s prospectus and have
determined that the Fund is an appropriate investment for the Account. Each Fund’s prospectus can
be downloaded from the Wells Fargo website at the following link:

http://www.wellsfargo.com/funds/fmg_fund/fund_type/fundtype.jhtml?fundType=MoneyMarket&tab=literature

I understand from reading the Fund’s prospectus that Wells Fargo Funds Management, LLC, (“Wells
Fargo Funds Management”), a wholly-owned subsidiary of Wells Fargo & Company, provides investment
advisory and other administrative services for the Wells Fargo Advantage Funds. Other affiliates
of Wells Fargo & Company provide sub-advisory and other services for the Funds. Boston Financial
Data Services serves as transfer agent for the Funds. The Funds are distributed by Wells Fargo
Funds Distributor, LLC, Member NASD/SIPC, an affiliate of Wells Fargo & Company. I also understand
that Wells Fargo & Company will be paid, and its bank affiliates may be paid, fees for services to
the Funds and that those fees may include Processing Organization fees as described in the Fund’s
prospectus.

I understand that you will not exclude amounts invested in the Fund from Account assets subject to
fees under the Account agreement between us.

I understand that investments in the Fund are not obligations of, or endorsed or guaranteed by,
Wells Fargo Bank or its affiliates and are not insured by the Federal Deposit Insurance
Corporation.

I acknowledge that I have full power to direct investments of the Account.

I understand that I may change this direction at any time and that it shall continue in effect
until revoked or modified by me by written notice to you.

I understand that if I choose to communicate this investment direction solely via facsimile, then
the investment direction will be understood to be enforceable and binding.

	 	 	 	 	 
	 

	 	 

Signature
	 	 
	 
	 	 	 	 
	 

	 	 

Dateexv10w2

EXHIBIT 10.2

 

STOCKHOLDERS AGREEMENT

Dated June 27, 2008

By and Among

MOBILE MINI, INC.

and

THE STOCKHOLDERS SIGNATORY HERETO

 

 

 

TABLE OF CONTENTS

	 	 	 	 	 	 	 	 	 
	 	 	 	 	 	 	Page	 
	ARTICLE I CERTAIN DEFINITIONS	 	 	1	 
	 	 	Section 1.1	 	Certain Definitions
	 	 	1	 
	 	 	 	 	 
	 	 	 	 
	ARTICLE II TRANSFER OF EQUITY SECURITIES	 	 	7	 
	 	 	Section 2.1	 	Restrictions
	 	 	7	 
	 	 	Section 2.2	 	Permitted Transfers
	 	 	8	 
	 	 	Section 2.3	 	Standstill
	 	 	10	 
	 	 	 	 	 
	 	 	 	 
	ARTICLE III REGISTRATION RIGHTS	 	 	11	 
	 	 	Section 3.1	 	Required Registrations
	 	 	11	 
	 	 	Section 3.2	 	Incidental Registration
	 	 	13	 
	 	 	Section 3.3	 	Registration Procedures
	 	 	14	 
	 	 	Section 3.4	 	Registration Expenses
	 	 	17	 
	 	 	Section 3.5	 	Indemnification; Contribution
	 	 	17	 
	 	 	Section 3.6	 	Holdback Agreements
	 	 	19	 
	 	 	Section 3.7	 	Availability of Information
	 	 	19	 
	 	 	Section 3.8	 	Information Concerning Stockholders
	 	 	19	 
	 	 	 	 	 
	 	 	 	 
	ARTICLE IV BOARD OF DIRECTORS OF THE COMPANY	 	 	20	 
	 	 	Section 4.1	 	Composition
	 	 	20	 
	 	 	Section 4.2	 	Vacancy and Removal
	 	 	22	 
	 	 	Section 4.3	 	Board Observation Rights
	 	 	22	 
	 	 	Section 4.4	 	Transfer of Preferred Stock by WCAS
	 	 	23	 
	 	 	 	 	 
	 	 	 	 
	ARTICLE V MISCELLANEOUS	 	 	23	 
	 	 	Section 5.1	 	Entire Agreement
	 	 	23	 
	 	 	Section 5.2	 	Table of Contents; Captions
	 	 	23	 
	 	 	Section 5.3	 	Counterparts
	 	 	23	 
	 	 	Section 5.4	 	Notices
	 	 	24	 
	 	 	Section 5.5	 	Successors and Assigns
	 	 	24	 
	 	 	Section 5.6	 	Governing Law
	 	 	24	 
	 	 	Section 5.7	 	Submission to Jurisdiction
	 	 	24	 
	 	 	Section 5.8	 	Waiver of Jury Trial
	 	 	25	 
	 	 	Section 5.9	 	Third Party Beneficiaries
	 	 	26	 
	 	 	Section 5.10	 	Confidentiality
	 	 	26	 
	 	 	Section 5.11	 	Expenses
	 	 	26	 
	 	 	Section 5.12	 	Amendments; Waivers
	 	 	26	 
	 	 	Section 5.13	 	No Strict Construction
	 	 	27	 
	 	 	Section 5.14	 	Specific Performance
	 	 	27	 

i  

 

STOCKHOLDERS AGREEMENT 

          STOCKHOLDERS AGREEMENT (this “Agreement”), dated June ___, 2008, by and among Mobile
Mini, Inc., a Delaware corporation (the “Company”) and the Persons listed on Schedule I
attached hereto (each, a “Stockholder” and collectively, the “Stockholders”).

W
I T N E S S E T H :

          WHEREAS, on the date hereof, in connection with the consummation of the transactions
contemplated by that certain Agreement and Plan of Merger (the “Merger Agreement”), dated
February 22, 2008, by and among the Company, Cactus Merger Sub, Inc., a Delaware corporation and
direct wholly-owned subsidiary of the Company, MSG WC Holdings Corp., a Delaware corporation
(“MSG”) and Target Stockholder Representative (as defined in the Merger Agreement), each
Stockholder became the record and beneficial owner of that number of shares of Series A Convertible
Redeemable Participating Preferred Stock of the Company, par value $0.01 per share (“Preferred
Stock”), listed opposite such Stockholder’s name on Schedule I attached hereto;

          WHEREAS, Welsh, Carson, Anderson & Stowe X, L.P. (“WCAS”) has the right in accordance
with Section 7.7 of the Merger Agreement to acquire up to an additional 2,000,000 shares of Common
Stock;

          WHEREAS, it is a condition to the consummation of the transactions contemplated by the Merger
Agreement that, simultaneously with such consummation, the Company and the Stockholders enter into
this Agreement; and

          WHEREAS, the Company and the Stockholders each desire to enter into this Agreement to,
inter alia, regulate and limit certain rights relating to any Securities which may
be held by any of the Stockholders from time to time and to limit the sale, assignment, transfer,
encumbrance or other disposition of such Securities and to provide for certain arrangements
regarding the management of the Company as set forth herein.

          NOW, THEREFORE, in consideration of the mutual covenants set forth herein and other good and
valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties
hereto, intending to be legally bound, hereby agree as follows:

ARTICLE I

CERTAIN DEFINITIONS

     Section 1.1 Certain Definitions. For purposes of this Agreement, the following terms
shall have the following meanings:

          “Affiliate” shall mean, with respect to any Person, any other Person directly or
indirectly controlling, controlled by, or under common control with, such Person; provided that,
for the purposes of this definition, “control” (including, with correlative meanings, the terms
“controlled by” and “under common control with”), as used with respect to any Person, shall
mean the possession, directly or indirectly, of the power to direct or cause the direction of the

   

 

management and policies of such Person, whether through the ownership of voting securities, by
contract or otherwise.

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

          “Approved Sale of the Company” shall mean a Sale of the Company that has been approved
by the Board and the Board has not withdrawn or modified its recommendation (to the extent it is
obligated to recommend the approval of such transaction to the Company’s stockholders under
applicable Law) of such Sale of the Company.

          “Board” shall mean the Board of Directors of the Company.

          “Business Day” means any day, other than a Saturday, Sunday or other day on which
banks located in New York City, New York or Tempe, Arizona are authorized or required by Law to
close.

          “Certificate of Designation” shall mean that certain Certificate of Designation of the
Company with respect to Preferred Stock, filed with the Secretary of State of the State of Delaware
on the date hereof.

          “Common Stock” shall mean the common stock of the Company, par value $0.01 per share.

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

          “Competitive Business” shall mean any business of the type and character engaged in
and competitive with that conducted by the Company from time to time (which constitutes at least
20% of its gross revenues on a consolidated basis), including, without limitation, the rental,
acquisition, refurbishment, renovation, or resale of shipping containers and other similar portable
storage solutions.

          “Confidentiality Agreement” shall mean that certain Mutual Confidentiality Agreement
dated as of December 14, 2007, between Target and Parent.

          “Confidential Information” shall have the meaning set forth in the Confidentiality
Agreement.

          “Controlled Affiliate” shall mean any Affiliate of a Stockholder (other than (x)
Affiliates of a portfolio company who are not otherwise an Affiliate of such Stockholder and (y) a
portfolio company of such Stockholder, except the following portfolio companies shall be deemed a
“Controlled Affiliate”: any portfolio company (i) in which such Stockholder and its other
Affiliates (other than another portfolio company of such Stockholder) has the power or right to
nominate at least 50% of the board of directors or other similar governing body of such portfolio
company or owns at least 50% of the outstanding voting equity securities of such portfolio company,
(ii) that has received confidential information concerning the Company and its Subsidiaries
(provided that possession or knowledge of such confidential information by any Affiliate of such
Stockholder serving on the board of directors or other similar governing body of
any entity without more shall not be imputed to such entity), or (iii) has taken any action at
the

 2 

 

direction of such Stockholder or another Affiliate of such Stockholder that is otherwise
prohibited or restricted by the terms of Section 2.3 of this Agreement).

          “Debt Securities” shall mean all bonds, debentures, notes and other instruments
evidencing indebtedness for borrowed money of the Company or any of its Subsidiaries from time to
time (including, without limitation, those certain 93/4% Senior Notes of Mobile Services Group, Inc.
and Mobile Storage Group, Inc. due 2014 and those certain 67/8% Senior Notes of the Company due 2015
and any participation in senior secured, second lien, asset-backed or other credit facilities of
the Company or any of its Subsidiaries), and any other instruments exchangeable or convertible
therefor.

          “Demand Notice” shall have the meaning set forth in Section 3.1(b) of this Agreement.

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

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

          “Equity Securities” shall mean all shares of Common Stock of the Company, all
securities, directly or indirectly, convertible into or exchangeable for shares of Common Stock of
the Company (including, without limitation, the Preferred Stock) and all options, warrants, and
other rights to purchase or otherwise, directly or indirectly, acquire from the Company shares of
Common Stock, or securities convertible into or exchangeable for shares of Common Stock, whether at
the time of issuance or upon the passage of time or the occurrence of some future event.

          “Exchange Act” shall mean the Securities Exchange Act of 1934, as amended, and the
rules and regulations of the SEC promulgated thereunder.

          “GAAP” shall mean United States generally accepted accounting principles consistently
applied by the Company and its Subsidiaries throughout the periods indicated.

          “Governmental Entity” shall mean any instrumentality, subdivision, court,
administrative agency, commission, official or other authority of the United States or any other
country or any state, province, prefect, municipality, locality or other government or political
subdivision thereof, or any quasi-governmental or private body exercising any regulatory, taxing,
importing or other governmental or quasi-governmental authority.

          “Holders’ Counsel” shall have the meaning set forth in the definition of “Registration
Expenses”.

          “Incidental Registration” shall have the meaning set forth in Section 3.2(a) of this
Agreement.

          “Law” means any statute, law, common law, order, ordinance, rule or regulation of any
Governmental Entity.

 3 

 

          “Majority Holders” shall mean the holders of Registrable Securities representing at
least a majority of the outstanding Registrable Securities from time to time.

          “Merger Agreement” shall have the meaning set forth in the first recital to this
Agreement.

          “NASDAQ” shall mean The Nasdaq Stock Market, Inc.

          “Non-Qualified Person” shall mean any Person who is (i) directly or indirectly engaged
in any business which the Board determines, in good faith, to be a Competitive Business, (ii) an
adverse party in any material legal proceeding or material arbitration proceeding or other
significant dispute (as determined in good faith by the Board), or (iii) an Affiliate of any Person
described in clauses (i) and (ii).

          “Original Stockholder” shall mean each Person that is either (a) a Stockholder as of
the date hereof or (b) a Permitted Transferee pursuant to a Transfer effected in accordance with
clause (i), (ii) or (iii) of Section 2.2(a) of this Agreement.

          “Permitted Transfer” shall have the meaning set forth in Section 2.2(a) of this
Agreement.

          “Permitted Transferee” shall have the meaning set forth in Section 2.2(a) of this
Agreement.

          “Person” shall mean and include an individual, a partnership, a joint venture, a
corporation, a limited liability company, a limited liability partnership, a trust, an incorporated
organization or any other entity or organization, including a Governmental Entity.

          “Preferred Stock” shall have the meaning set forth in the first recital to this
Agreement.

          “Qualifying Securities” shall mean the Preferred Stock and any Equity Securities
issued upon conversion or exchange for the Preferred Stock pursuant to the Certificate of
Designation.

          “Registrable Securities” shall mean shares of Common Stock issued upon the conversion
of Preferred Stock pursuant to the Certificate of Designation and any Common Stock acquired by WCAS
as permitted by Section 7.7 of the Merger Agreement to the extent such shares have not been
previously registered and sold pursuant to an effective registration statement and any other shares
of Common Stock that may be received in respect of any of the foregoing securities; provided, that
any Registrable Securities shall cease to be Registrable Securities:

     (i) when a registration statement with respect to the sale of such securities shall
have become effective under the Securities Act and such securities shall have been disposed
of in accordance with such registration statement;

 4 

 

     (ii) when such securities shall have been distributed by the holder thereof to the
public pursuant to Rule 144 under the Securities Act (or any successor provision); or

     (iii) when such securities shall have ceased to be outstanding.

          “Registration” shall mean the Shelf Registration, each Required Registration and each
Incidental Registration.

          “Registration Expenses” shall mean all expenses incident to the Company’s performance
of or compliance with Article III including, without limitation, all registration and filing fees,
fees and expenses of compliance with securities or blue sky laws (including reasonable fees and
disbursements of counsel in connection with blue sky qualifications of any Registrable Securities),
expenses of printing certificates for any Registrable Securities in a form eligible for deposit
with the Depository Trust Company, messenger and delivery expenses, internal expenses (including,
without limitation, all salaries and expenses of its officers and employees performing legal or
accounting duties), and fees and disbursements of counsel for the Company and its independent
certified public accountants (including the expenses of any management review, cold comfort letters
or any special audits required by or incident to such performance and compliance), securities acts
liability insurance (if the Company elects to obtain such insurance), the reasonable fees and
expenses of any special experts retained by the Company in connection with such registration, fees
and expenses of other Persons retained by the Company, the fees and expenses of one (1) counsel not
to exceed $50,000 (the “Holders’ Counsel”) and applicable local counsel for the holders of
Registrable Securities to be included in the relevant Registration, selected by the holders of a
majority of the Registrable Securities to be included in such Registration; but not including any
underwriting fees, discounts or commissions attributable to the sale of securities or fees and
expenses of counsel representing the holders of Registrable Securities included in such
Registration (other than the Holders’ Counsel and applicable local counsel) incurred in connection
with the sale of Registrable Securities.

          “Required Registration” shall have the meaning set forth in Section 3.1(b) of this
Agreement.

          “Sale of the Company” shall mean

          (i) any consolidation or merger of the Company or a Subsidiary of the Company in which the
shares of Common Stock are converted into cash, securities or other property;

          (ii) any sale, lease, exchange or other transfer (in one transaction or a series of related
transactions) of all, or substantially all, of the assets of the Company and its Subsidiaries; or

          (iii) any Person has become the beneficial owner (within the meaning of Rule 13d-3
promulgated under the Exchange Act) of shares of the capital stock of the Company representing
greater than 50% of the outstanding voting power of the Company.

          “SEC” shall mean, at any time, the Securities and Exchange Commission or any other
federal agency at such time administering the Securities Act.

 5 

 

          “Securities” shall mean, collectively, the Equity Securities and the Debt Securities
held by a Stockholder from time to time.

          “Securities Act” shall mean the Securities Act of 1933, as amended, and the rules and
regulations of the SEC promulgated thereunder.

          “Selection Date” shall mean the date that is sixty (60) days prior to the date on
which the Company distributes to its stockholders the proxy statement relating to each applicable
annual meeting.

          “Shelf Registration” shall have the meaning set forth in Section 3.1(a) of this
Agreement.

          “Shelf Registration Lapse Date” shall mean the date, if any, that (x) the Company is
not permitted to file or maintain a Form S-3 in connection with the Shelf Registration in
accordance with Section 3.1(a), or (y) the Shelf Registration expired in accordance with Section
3.1(a)(i) and not all Registrable Securities registered in such Shelf Registration have been sold.

          “Shelf Registration Statement” shall have the meaning set forth in Section 3.1(a) of
this Agreement.

          “Standstill Period” shall have the meaning set forth in Section 2.3(a) of this
Agreement.

          “Standstill Securities” shall mean any Equity Securities of the Company or any of its
Subsidiaries (in each case, other than Qualifying Securities), and Debt Securities of the Company
or any of its Subsidiaries.

          “Stockholder” shall have the meaning set forth in the preamble to this Agreement,
subject to Section 2.2 hereof.

          “Subject Stockholder” shall mean WCAS and each Permitted Transferee of WCAS pursuant
to a Transfer described in clause (iii) of Section 2.2(a).

          “Subsidiary” or “Subsidiaries” shall mean, with respect to any Person, (i) any
corporation more than 50% of whose stock of any class or classes having by the terms thereof
ordinary voting power to elect a majority of the directors of such corporation (irrespective of
whether or not at the time stock of any class or classes of such corporation shall have or might
have voting power by reason of the happening of any contingency) is owned by such Person directly
or indirectly through one or more Subsidiaries of such Person and (ii) any partnership,
association, joint venture or other entity in which such Person directly or indirectly through one
or more Subsidiaries of such Person has more than a 50% equity interest.

          “Transaction Documents” shall mean, collectively, (i) this Agreement, (ii) the Merger
Agreement, (iii) that certain Joinder to the Merger Agreement, dated February 22, 2008,
executed by WCAS Management Corporation and certain of the other Stockholders, (iv) that
certain Joinder, dated June 9, 2008, executed by Douglas Waugaman, (v) that certain Escrow
Agreement, dated as of the date hereof, among the Company, MSG and Wells Fargo Bank, N.A.,

 6 

 

as escrow agent, and (vi) each other agreement, instrument and document delivered pursuant to or in
connection with any of the transactions contemplated by the documents described in clauses (i)
through (v) of this definition.

          “Transfer” shall have the meaning set forth in Section 2.1(a) of this Agreement.

          “WCAS” shall have the meaning set forth in the second recital to this Agreement.

          “WCAS Directorship Term End Date” shall have the meaning set forth in Section 4.4 of
this Agreement.

          “WCAS Observer” shall have the meaning set forth in Section 4.3(a) of this Agreement.

          “WCAS Permanent Director” shall have the meaning set forth in Section 4.1(a) of this
Agreement.

          “WCAS Temporary Director” shall have the meaning set forth in Section 4.1(a) of this
Agreement.

ARTICLE II

TRANSFER OF EQUITY SECURITIES 

     Section 2.1 Restrictions.

          (a) No Stockholder shall, voluntarily or involuntarily, directly or indirectly, sell, assign,
donate, hypothecate, pledge, encumber, grant a security interest in or in any other manner
transfer, any Securities, in whole or in part, or any other right or interest therein, or enter
into any transaction which results in the economic equivalent of a transfer to any Person (each
such action, a “Transfer”) except pursuant to a Permitted Transfer.

          (b) From and after the date hereof, all certificates or other instruments representing
Securities held by each Stockholder shall bear a legend which shall state:

“The sale, transfer, hypothecation, assignment, pledge, encumbrance or other
disposition of this [note and the obligations of the issuer] [share certificate and
the shares of [Preferred] [Common] Stock] represented hereby are restricted by and
are subject to all of the terms, conditions and provisions of that certain
Stockholders Agreement, dated as of [                    ], 2008, as amended from time to time,
by and between the Company and the investors party thereto, which agreement is on
file at the principal office of the Company.”

          (c) In addition to the legend required by Section 2.1(b) above, all certificates representing
Equity Securities held by each Stockholder (other than Equity Securities acquired pursuant to
Section 7.7 of the Merger Agreement or that have otherwise been previously registered and sold
pursuant to an effective registration statement under the Securities Act) shall bear a legend which
shall state:

 7 

 

“The securities represented by this certificate have not been registered under the
Securities Act of 1933, as amended, or pursuant to any state securities laws. The
securities have been acquired for investment and may not be sold or transferred
except in compliance with the registration requirements of the Securities Act of
1933, as amended, and applicable state securities laws or pursuant to an exemption
therefrom.”

          (d) Any attempt to transfer any Security which is not in accordance with this Agreement shall
be null and void and the Company agrees that it will not cause, permit or give any effect to any
Transfer of any Securities to be made on its books and records unless such Transfer is permitted by
this Agreement and has been made in accordance with the terms hereof.

          (e) Each Stockholder agrees that it will not effect any Transfer of Securities unless such
Transfer is a Permitted Transfer and is made (i) pursuant to an effective registration statement
under the Securities Act or pursuant to an exemption from the registration requirements of the
Securities Act or pursuant to Rule 144 or Rule 144A promulgated under the Securities Act and (ii)
in accordance with all applicable Laws (including, without limitation, all securities laws).

          Section 2.2 Permitted Transfers.

          (a) Notwithstanding anything to the contrary contained herein and subject to Sections 2.2(b)
and 2.2(c), a Stockholder may at any time effect any of the following Transfers (each a
“Permitted Transfer”, and each transferee of such Stockholder in respect of such Transfer,
a “Permitted Transferee”):

     (i) any Transfer of any or all Securities held by a Stockholder who is a natural Person
following such Stockholder’s death by will or intestacy to such Stockholder’s legal
representative, heir or legatee;

     (ii) any Transfer of any or all Securities held by a Stockholder who is a natural
Person as a gift or gifts during such Stockholder’s lifetime to such Stockholder’s spouse,
children, grandchildren or a trust or other legal entity for the exclusive benefit of such
Stockholder or any one or more of the foregoing;

     (iii) any Transfer of any or all Securities held by a Stockholder to any Affiliate of
such Stockholder; provided that such Affiliate is a Person who is not a
Non-Qualified Person; provided, further that any such Affiliate shall Transfer such
Securities to the Stockholder from whom the Securities were originally received or acquired
within five (5) calendar days after ceasing to be an Affiliate of such Stockholder;

     (iv) any Transfer, occurring on or after the first (1st) anniversary of the date
hereof, of any or all Common Stock or Debt Securities or other securities, other than the
Preferred Stock held by a Stockholder provided that if any such Transfer is a private sale
and not in connection with an underwritten offering or a block trade to a financial
intermediary or other public sale (including any Rule 144 sale in a brokered transaction)
then such sale may not be made if (A) the transferee (or any group (as defined in Rule
13(d)(3) of the Exchange Act) of transferees) would purchase in that transaction, (or

 8 

 

pursuant to all transactions with that Stockholder or group (as defined in Rule 13(d)(3) of
the Exchange Act) of Stockholders) more than three percent (3%) of the fully diluted Common
Stock (as of the relevant time of determination), which will be provided promptly upon the
written request of any Stockholder to the Company’s Secretary or Chief Financial Officer
determined either by reference to the Company’s most recently filed Form 10-K or Form 10-Q
or upon information provided by the Company, or (B) the transferee with respect to such
Transfer is a Non-Qualified Person; and

     (v) any Transfer, occurring on or after the first (1st) anniversary of the date hereof,
of the Preferred Stock if (A) the transferee with respect to such Transfer is not a
Non-Qualified Person, (B) the transferee (or any group (as defined in Rule 13(d)(3) of the
Exchange Act) of transferees) would purchase in that transaction, (or pursuant to all
transactions with that Stockholder or group (as defined in Rule 13(d)(3) of the Exchange
Act) of Stockholders) more than three percent (3%) of the fully diluted Common Stock (as of
the relevant time of determination), which will be provided promptly upon the written
request of any Stockholder to the Company’s Secretary or Chief Financial Officer determined
either by reference to the Company’s most recently filed Form 10-K or Form 10-Q or upon
information provided by the Company, and (C) the aggregate number of Permitted Transferees
in connection with all Transfers of Equity Securities by (i) any single Stockholder (other
than WCAS, Lehman or Calsters) pursuant to this clause (v) does not exceed one (1) person;
and (ii) with respect to WCAS, Lehman and Calsters pursuant to this clause (v) does not
exceed five (5), two (2) and two (2) Persons, respectively; provided, that prior to
effecting any Transfer pursuant to this clause (v), the transferee(s) with respect to a
Transfer pursuant to this clause (v) shall agree in writing not to Transfer any of the
Preferred Stock to a Non-Qualified Person pursuant to a private sale.

          (b) In any Transfer referred to above in clauses (i), (ii) or (iii) of Section 2.2(a), the
Permitted Transferee shall agree in writing to be bound by all of the provisions of this Agreement,
shall execute and deliver to the Company a counterpart to this Agreement, and shall hold all such
Securities as a “Stockholder” hereunder as if such Permitted Transferee was an original signatory
hereto and shall be deemed to be a party to this Agreement. In addition, each Permitted Transferee
(A) pursuant to a Transfer by a Stockholder other than WCAS referred to in clause (i), (ii) or
(iii) of Section 2.2(a) shall hold all Equity Securities an “Original Stockholder” hereunder, and
(B) pursuant to a Transfer by WCAS referred to in clause (iii) of Section 2.2(a) shall hold all
Equity Securities as a “Subject Stockholder” and an “Original Stockholder” hereunder.

          (c) Notwithstanding anything to the contrary contained in this Agreement, prior to the WCAS
Directorship Term End Date, at all times during the Company’s customary
black-out periods (i.e., relating to the public release of quarterly or annual financial
information) neither WCAS nor any of its Controlled Affiliates shall sell any Securities other than
during any period when the directors and officers of the Company and its Subsidiaries are not
prohibited from selling Securities pursuant to the written policies and procedures of the Company
governing transfers of Securities by such officers and directors during such ordinary black-out
periods as may be in effect from time to time; provided, however, that (i) the
foregoing limitation shall not apply to WCAS or any of its Controlled Affiliates if the black-out
period imposed by

 9 

 

the Company results from the occurrence of an extraordinary event affecting the
Company or any of its Subsidiaries, and (ii) if circumstances exist such that the Company would
have the right to take the actions specified in Section 3.1(e) of this Agreement, then
(notwithstanding anything to the contrary set forth in clause (i)) the foregoing prohibition may be
imposed by the Company under the circumstances described in Section 3.1(e) of this Agreement, for
the periods and subject to the limitations set forth in such Section.

     Section 2.3 Standstill.

          For the period (the “Standstill Period”) commencing on the date hereof and ending on
the date on which the Subject Stockholders, in the aggregate, no longer hold Equity Securities
constituting (or representing upon the conversion thereof) five percent (5%) or more of the
outstanding shares of Common Stock, no Subject Stockholder shall, and each Subject Stockholder
shall cause its respective Controlled Affiliates, unless expressly agreed in writing, in advance,
by the Company, directly or indirectly, in any manner whatsoever:

          (a) acquire, announce an intention to acquire, offer or propose to acquire, solicit an offer
to sell or agree to acquire, or enter into any arrangement or undertaking to acquire, directly or
indirectly, by purchase, or otherwise, record or direct or indirect beneficial ownership interest
in any Standstill Securities or any assets (other than purchases of assets in the ordinary course
of business) or other securities of the Company or any of its Subsidiaries or any direct or
indirect rights, warrants or options to acquire record or direct or indirect beneficial ownership
of any securities or assets of the Company or any of its Subsidiaries;

          (b) make, effect, initiate, cause or participate in any take-over bid, tender offer, exchange
offer, merger, consolidation, business combination, recapitalization, restructuring, liquidation,
dissolution or other extraordinary transaction involving the Company or any of its Subsidiaries;

          (c) solicit, make, effect, initiate, cause, or in any way participate in, directly or
indirectly, any solicitation of proxies or consents from any holders of any securities of the
Company or any of its Subsidiaries or call or seek to have called any meeting of stockholders of
the Company or any of its Subsidiaries;

          (d) form, join or participate in, or otherwise encourage the formation of, any “group” (within
the meaning of Section 13(d)(3) of the Exchange Act) with respect to any securities of the Company
or any of its Subsidiaries that are not Standstill Securities;

          (e) arrange, facilitate, or in any way participate, directly or indirectly, in any financing
for the purchase of any securities or assets of the Company or any of its Subsidiaries that are not
Standstill Securities;

          (f) (i) act, directly or indirectly, to seek control or direct the board of directors,
stockholders, policies or affairs of the Company or any of its Subsidiaries; (ii) solicit, propose,
seek to effect or negotiate with any other Person with respect to any form of business combination
transaction involving the Company or any take-over bid, tender, exchange offer, merger,
consolidation, recapitalization, restructuring, liquidation, dissolution, or other extraordinary
transaction involving the Company or any of its Subsidiaries; or (iii) disclose an

 10 

 

intent, purpose,
plan or proposal with respect to the Company, or any securities or assets of the Company or any of
its Subsidiaries that are not Standstill Securities;

          (g) take any action that is intended to or reasonably expected to require the Company or any
of its Subsidiaries to make a public announcement regarding any of the types of matters set forth
in clauses (a) through (f), inclusive, of this Section 2.3;

          (h) agree or offer to take, or encourage or propose (publicly or privately) the taking of, or
announce an intention to take, or otherwise make any public announcement with respect to, any
action referred to in clauses (a) through (g), inclusive, of this Section 2.3; and

          (i) request of, or propose to the Company, or any of its representatives that the Company
amend or waive or consider the amendment or waiver of any provision of this Section 2.3.

Notwithstanding anything to the contrary in this Section 2.3, (i) any pooled investment vehicle
managed or under the control of WCAS or any of its Affiliates that primarily invests on a passive
basis in debt securities or debt instruments shall be permitted to acquire up to $50 million in the
aggregate of all classes or types of Debt Securities that are not convertible into Equity
Securities or otherwise have voting features permitting the holders thereof to vote with the
holders of any Equity Security on any matter, (ii) this Section 2.3 shall not apply to any indirect
interest held by any Controlled Affiliate of a Person if such Controlled Affiliate is an individual
or trust or other investment vehicle formed for the benefit of individuals or charitable concerns
and such interest is held through another entity that is not controlled by such Controlled
Affiliate (e.g. a publicly traded mutual fund, a “blind” trust or investment account or a private
equity or other private investment fund with respect to which such Controlled Affiliate is not
affiliated) and (iii) nothing herein shall limit in anyway the conduct of any person who is serving
on the Board and who is affiliated with WCAS or any of its Controlled Affiliates from taking any
actions in his or her capacity as such, nor prohibit any such person or WCAS or any of its
Controlled Affiliates from taking any action in furtherance of or in order to assure that any
person who may be designated by them to serve on the Board as contemplated by this Agreement is
elected to serve on the Board. In addition, notwithstanding anything to the contrary in this
Section 2.3, each Subject Stockholder shall be permitted to sell its Equity Securities in any
Approved Sale of the Company.

ARTICLE III

REGISTRATION RIGHTS

     Section 3.1 Required Registrations.

          (a) Shelf Registration Statement. Subject to each Stockholder’s compliance with
Section 3.8, the Company shall use all commercially reasonable efforts to file a registration
statement under the Securities Act on or about the date that is ten (10) months from the date
hereof covering all of the Registrable Securities then held by the Stockholders on Form S-3 or such
other available forms (the “Shelf Registration”) and to have such Registration Statement
declared effective to enable the resale of such Registrable Securities after the first (1st)

 11 

 

anniversary of the date hereof on a delayed or continuous basis pursuant to Rule 415 under the
Securities Act (the “Shelf Registration Statement”) through NASDAQ or such other market as
may be the principal market on which the Registrable Securities are then quoted or listed. The
Company will use all commercially reasonable efforts to cause the Shelf Registration Statement to
remain continuously effective under the Securities Act until the earlier of (i) the date that is
two (2) years (or such longer period as may be permitted under applicable Law) after the initial
effectiveness thereof and (ii) the earliest date on which all Registrable Securities held by the
Stockholders shall have either (A) been sold in accordance with this Section 3.1(a) or (B) ceased
to be outstanding.

          (b) Required Registrations. If, at any time after the Shelf Registration Lapse Date,
the Company shall be requested in writing, which writing shall specify the Registrable Securities
to be sold and the intended method of disposition thereof (a “Demand Request”), by the
Majority Holders, to effect a registration under the Securities Act of Registrable Securities held
by such Stockholders (each, a “Required Registration”), then the Company shall promptly use
all commercially reasonable efforts to effect such Required Registration by filing, at the
Company’s option, either a Form S-1 or Form S-3 registration statement (a “Demand Registration
Statement”); provided the Company shall not be required to comply with more than one
(1) Demand Request during any six (6) month period and shall only be obligated to comply with four
(4) Demand Requests in total; provided, that if a Shelf Registration Lapse Date occurs
during the period beginning on the date that the Shelf Registration contemplated by Section 3.1(a)
is declared effective and ending on the second anniversary of the date thereof, then the limit for
Demand Requests shall be increased by one (1). Upon receipt by the Company of a Demand Request,
the Company shall deliver a written notice (a “Demand Notice”) to each Stockholder who did
not make such Demand Request stating that the Company intends to comply with a Demand Request and
informing each such Stockholder of its right to include Registrable Securities in such Required
Registration. Within ten (10) Business Days after receipt of a Demand Notice, each Stockholder
shall have the right to request in writing that the Company include all or a specific portion of
the Registrable Securities held by such Stockholder in such Required Registration. Notwithstanding
anything to the contrary set forth herein, the Company shall be obligated to effect any one or more
of such Required Registrations pursuant to a Shelf Registration Statement if the Majority Holders
so request in connection with any Demand Request.

          (c) Selection of Underwriters. In the event that the Registrable Securities to be registered
pursuant to a Required Registration are to be disposed of in an underwritten public offering, the
underwriters of such public offering shall be one or more underwriting firms of nationally
recognized standing selected by the Majority Holders and shall be reasonably acceptable to the
Company. In the event the Company elects to file a Demand Registration Statement on Form S-3 and
the underwriters, if any, in such public offering or the Majority Holders request that the Company
provide disclosures otherwise required in connection with a Form S-1 registration statement, then
the Company shall include in such Demand Registration Statement such “long form” disclosures.

          (d) Priority on Required Registrations. In the event that, in the case of any Required
Registration, the managing underwriter for the public offering contemplated by Section 3.1(b) shall
advise the Company in writing (with a copy to each holder of Registrable Securities

 12 

 

requesting
sale) that, in such underwriter’s opinion, the amount of securities requested to be included in
such Required Registration would adversely affect the public offering and sale (including pricing)
of such Registrable Securities (such writing to state the basis of such opinion and the approximate
number of Registrable Securities that may be included in such public offering without such effect),
the Company will include in such Required Registration the number of Registrable Securities that
the Company is so advised can be sold in such public offering, in the following amounts:

     (i) first, all Registrable Securities requested to be sold by holders of
Registrable Securities pursuant to Section 3.1(b) pro rata among such
holders on the basis of the number of Registrable Securities owned by each such holders; and

     (ii) second, securities proposed to be sold by the Company for its own account.

          (e) Black Out Period. Notwithstanding any other provision of this Agreement to the
contrary, if the Board reasonably determines that the registration and distribution of Registrable
Securities (i) would reasonably be expected to impede, delay or interfere with, or require
premature disclosure of, any material financing, offering, acquisition, merger, corporate
reorganization, segment reclassification or discontinuation of operations, or other significant
transaction or any negotiations, discussions or pending proposals with respect thereto, involving
the Company or any of its Subsidiaries, or (ii) would require disclosure of non-public material
information, the disclosure of which would reasonably be expected to adversely affect the Company,
the Company shall (x) be entitled to postpone the filing or effectiveness or suspend the
effectiveness of a registration statement and/or the use of any prospectus for a period of time not
to exceed sixty (60) days and (y) promptly give the Stockholders written notice of such
postponement or suspension (which notice need not specify the nature of the event giving rise to
such suspension); provided, that the Company shall not utilize the right described in
Section 3.1(b) more than once in any six (6) month period and provided further that the Company may
extend such period to be up to ninety (90) days in the aggregate, but if it elects to do so it
shall not be permitted to impose a subsequent black out period until a time that is more than six
(6) months after the end of such extended black out period. Notwithstanding anything to the
contrary set forth herein, any application of the provisions of Section 2.2(c) of this Agreement
that results in a postponement of the effectiveness of a registration statement pursuant to
this Section 3.1(e) shall not be included in calculating the 60-day period or 90-day period above.

     Section 3.2 Incidental Registration.

          (a) Filing of Registration Statement. If, at any time after the first (1st)
anniversary of the date hereof the Company proposes to register, for its own account or for the
account of any other Person any of its securities (an “Incidental Registration”) under the
Securities Act (other than pursuant to a registration statement on Form S 4 or Form S 8 or any
successor forms thereto) for sale to the public, it will at each such time give prompt written
notice to all Stockholders of its intention to do so, which notice shall be given at least thirty
(30) days prior to the date that a registration statement relating to such registration is proposed
to be filed with the SEC. Upon the written request of any Stockholder to include Registrable
Securities held by it that are not otherwise covered by the Shelf Registration Statement or a

 13 

 

Demand Registration Statement in such Incidental Registration statement (which request shall (i) be
made within fifteen (15) days after the receipt of any such notice, and (ii) specify the
Registrable Securities intended to be included by such holder), the Company will use all
commercially reasonable efforts to effect the registration of all Registrable Securities that the
Company has been so requested to register by such Stockholder; provided, however,
that if, at any time after giving written notice of its intention to register any securities and
prior to the effective date of the registration statement filed in connection with such
registration, the Company shall determine for any reason to terminate such registration statement
and not to register such securities, the Company may, at its election, give written notice of such
determination to each such holder and, thereupon, shall be relieved of its obligation to register
any Registrable Securities of such Persons in connection with such registration.

          (b) Selection and Use of Underwriters. Underwriters, if any, in connection with any
offering pursuant to this Section 3.2 shall be selected at the sole and exclusive discretion of the
Company. No Stockholder shall Transfer any Registrable Securities included in the Incidental
Registration other than through the underwriter or underwriters so selected by the Company.

          (c) Priority on Incidental Registrations. If the managing underwriter for the
offering contemplated by this Section 3.2 shall advise the Company in writing that, in such
underwriter’s opinion, the number of securities requested to be included in such Incidental
Registration would adversely affect the offering and sale (including pricing) of such securities,
the Company shall include in such Incidental Registration the number of securities that the Company
is so advised can be sold in such offering, in the following amounts and order of priority:

     (i) first, securities proposed to be sold by the Company for its own account or
for the account of any other Person not a party hereto; and

     (ii) second, the Registrable Securities requested to be registered by
Stockholders pro rata among such Stockholders on the basis of the number of Registrable
Securities owned by each such Stockholders.

     Section 3.3 Registration Procedures.

          The Company will use all commercially reasonable efforts to effect the Shelf Registration and
Required Registration pursuant to Section 3.1 and each Incidental Registration pursuant to Section
3.2, and to cooperate with the sale of such Registrable Securities in accordance with the intended
method of disposition thereof as quickly as reasonably practicable, and the Company will as
expeditiously as reasonably practicable:

          (a) subject, in the case of an Incidental Registration, to the proviso to Section 3.2(a),
prepare and file with the SEC the registration statement and use all commercially reasonable
efforts to cause the Registration to become effective;

          (b) subject, in the case of an Incidental Registration, to the proviso to Section 3.2(a),
prepare and file with the SEC such amendments and post-effective amendments to any registration
statement and any prospectus used in connection therewith as may be necessary to

 14 

 

keep such
registration statement effective and to comply with the provisions of the Securities Act with
respect to the disposition of all Registrable Securities covered by such registration statement
until such time as all of such Registrable Securities have been disposed of in accordance with the
intended methods of disposition by the seller or sellers thereof set forth in such registration
statement and cause the prospectus to be supplemented by any required prospectus supplement, and as
so supplemented to be filed pursuant to Rule 424 under the Securities Act;

          (c) furnish, upon request, to each holder of Registrable Securities to be included in such
Registration and the underwriter or underwriters, without charge, at least one copy of the signed
registration statement and any post-effective amendment thereto, and such number of conformed
copies thereof and such number of copies of the prospectus (including each preliminary prospectus
and each prospectus filed under Rule 424 under the Securities Act), any amendments or supplements
thereto and any documents incorporated by reference therein, as such holder or underwriter may
reasonably request in order to facilitate the disposition of the Registrable Securities being sold
by such holder (it being understood that the Company consents to the use of the prospectus and any
amendment or supplement thereto by each holder of Registrable Securities covered by such
registration statement and the underwriter or underwriters, in connection with the offering and
sale of the Registrable Securities covered by the prospectus or any amendment or supplement
thereto);

          (d) notify each holder of the Registrable Securities to be included in such Registration and
the underwriter or underwriters:

     (i) of any stop order or other order suspending the effectiveness of any registration
statement, issued or threatened by the SEC in connection therewith, and take all
commercially reasonable actions required to prevent the entry of such stop order or to
remove it or obtain withdrawal of it at the earliest possible moment if entered;

     (ii) when such registration statement or any prospectus used in connection therewith,
or any amendment or supplement thereto, has been filed and, with respect to such
registration statement or any post-effective amendment thereto, when the same has become
effective;

     (iii) of any written request by the SEC for amendments or supplements to such
registration statement or prospectus; and

     (iv) of the receipt by the Company of any notification with respect to the suspension
of the qualification of any Registrable Securities for sale under the applicable securities
or blue sky laws of any jurisdiction;

          (e) if requested by the managing underwriter or underwriters, promptly incorporate in a
prospectus supplement or post-effective amendment such information relating to such underwriting as
the managing underwriter or underwriters reasonably request to be included therein; and make all
required filings of such prospectus supplement or post-effective amendment as soon as practicable
after being notified of the matters incorporated in such prospectus supplement or post-effective
amendment; provided, however, that the Company shall

 15 

 

not be required to take any
action pursuant to this Section 3.3(e) that would, in the opinion of counsel to the Company,
violate applicable Law;

          (f) on or prior to the date on which a Registration is declared effective, use all
commercially reasonable efforts to register or qualify, and cooperate with the holders of
Registrable Securities to be included in such Registration, the underwriter or underwriters, if
any, and their counsel, in connection with the registration or qualification of the Registrable
Securities covered by such Registration for offer and sale under the securities or “blue sky” laws
of each state and other jurisdiction of the United States as any such holder or underwriter
reasonably requests in writing; use all commercially reasonable efforts to keep each such
registration or qualification effective, including through new filings, or amendments or renewals,
during the period such registration statement is required to be kept effective; and do any and all
other acts or things reasonably necessary or advisable to enable the disposition of the Registrable
Securities in all such jurisdictions reasonably requested to be covered by such Registration;
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 which would
subject it to general service of process in any such jurisdiction where it is not then so subject;

          (g) in connection with any sale pursuant to a Registration, cooperate with the holders of
Registrable Securities to be included in such Registration and the managing underwriter or
underwriters, to facilitate the timely preparation and delivery of certificates (not bearing any
restrictive legends including, without limitation, those set forth in Section 2.1) representing
securities to be sold under such Registration, and enable such securities to be in such
denominations and registered in such names as the managing underwriter or underwriters, if any, or
such holders may request;

          (h) use all commercially reasonable efforts to cause the Registrable Securities to be
registered with or approved by such other governmental agencies or authorities within the United
States and having jurisdiction over the Company or any Subsidiary as may be necessary
to enable the seller or sellers thereof or the underwriter or underwriters, as applicable, to
consummate the disposition of such securities;

          (i) use all commercially reasonable efforts to obtain such legal opinions and auditors’
consents as may be required by applicable Law;

          (j) otherwise comply with all applicable rules and regulations of the SEC, and make generally
available to its security holders (as contemplated by Section 11(a) under the Securities Act) an
earnings statement satisfying the provisions of Rule 158 under the Securities Act no later than
ninety (90) days after the end of the twelve (12) month period beginning with the first month of
the Company’s first fiscal quarter commencing after the effective date of the registration
statement, which statement shall cover said twelve (12) month period; and

          (k) use all commercially reasonable efforts to cause its senior executive officers to
participate in “road shows” at the request of the underwriters in connection with a Required
Registration; provided, that such senior executive officers shall not be required to
participate in “road shows” for more than two (2) Required Registrations.

 16 

 

     Section 3.4 Registration Expenses.

          The Company will pay all Registration Expenses in connection with each registration of
Registrable Securities, including, without limitation, any such registration not effected by the
Company. WCAS shall promptly reimburse the Company for any incremental Registration Expenses
incurred by the Company in connection with the registration of any shares of Common Stock acquired
by WCAS in accordance with Section 7.7 of the Merger Agreement as reasonably agreed by the Company
and WCAS.

     Section 3.5 Indemnification; Contribution.

          (a) The Company shall indemnify, to the fullest extent permitted by applicable Law, each
holder of Registrable Securities, its officers, directors, partners, employees and agents, if any,
and each Person, if any, who controls such holder within the meaning of Section 15 of the
Securities Act, against all losses, claims, damages, liabilities (or proceedings in respect
thereof) and expenses (under the Securities Act or common law or otherwise), joint or several,
resulting from any violation by the Company of the provisions of the Securities Act or any untrue
statement or alleged untrue statement of a material fact contained in any registration statement or
prospectus (and as amended or supplemented if amended or supplemented) or any preliminary
prospectus or caused by any omission or alleged omission to state therein a material fact required
to be stated therein or necessary to make the statements therein (in the case of any prospectus, in
light of the circumstances under which they were made) not misleading, except to the extent that
such losses, claims, damages, liabilities (or proceedings in respect thereof) or expenses are
caused by any untrue statement or alleged untrue statement contained in or by any omission or
alleged omission from information concerning any holder of Registrable Securities furnished in
writing to the Company by such holder expressly for use therein. No action or
failure to act on the part of the underwriters (whether or not such underwriter is an
Affiliate of any holder of Registrable Securities) shall affect the obligations of the Company to
indemnify any holder of Registrable Securities or any other Person pursuant to the preceding
sentence. In connection with any underwritten offering pursuant to Section 3.2, the Company agrees
to enter into an underwriting agreement in customary form with the applicable underwriters, and the
Company agrees to indemnify such underwriters, their officers, directors, employees and agents, if
any, and each Person, if any, who controls such underwriters within the meaning of Section 15 of
the Securities Act to the same extent as herein before provided with respect to the indemnification
of the holders of Registrable Securities; provided that the Company shall not be required
to indemnify any such underwriter, or any officer, director or employee of such underwriter or any
Person who controls such underwriter within the meaning of Section 15 of the Securities Act, to the
extent that the loss, claim, damage, liability (or proceedings in respect thereof) or expense for
which indemnification is claimed results from such underwriter’s failure to send or give a copy of
an amended or supplemented final prospectus to the Person asserting an untrue statement or alleged
untrue statement or omission or alleged omission at or prior to the written confirmation of the
sale of Registrable Securities to such Person if such statement or omission was corrected in such
amended or supplemented final prospectus prior to such written confirmation and the underwriter was
provided with such amended or supplemented final prospectus.

 17 

 

          (b) In connection with any registration statement in connection with an offering in which a
holder of Registrable Securities is participating, each such holder, severally and not jointly,
shall indemnify, to the fullest extent permitted by applicable Law, the Company, each underwriter
and their respective officers, directors, employees and agents, if any, and each Person, if any,
who controls the Company or such underwriter within the meaning of Section 15 of the Securities
Act, against any losses, claims, damages, liabilities (or proceedings in respect thereof) and
expenses resulting from any untrue statement or alleged untrue statement of a material fact, or any
omission or alleged omission of a material fact required to be stated in the registration statement
or prospectus or preliminary prospectus or any amendment thereof or supplement thereto or necessary
to make the statements therein (in the case of any prospectus, in light of the circumstances under
which they were made) not misleading, but only to the extent that such untrue statement is
contained in or such omission is from information so concerning a holder furnished in writing by
such holder expressly for use therein; provided that such holder’s obligations hereunder
shall be limited to an amount equal to the net proceeds to such holder of the Registrable
Securities sold pursuant to such registration statement.

          (c) Any Person entitled to indemnification under the provisions of this Section 3.5 shall (i)
give prompt notice to the indemnifying party of any claim with respect to which it seeks
indemnification and (ii) permit such indemnifying party to assume the defense of such claim, with
counsel reasonably satisfactory to the indemnified party; and if such defense is so assumed, such
indemnifying party shall not enter into any settlement without the consent of the indemnified party
if such settlement attributes liability to the indemnified party and such indemnifying party shall
not be subject to any liability for any settlement made without its consent (which shall not be
unreasonably withheld); and any underwriting agreement entered into with respect to any
registration statement provided for under this Article III shall so provide. In the event an
indemnifying party shall elect not to assume the defense of a claim, such indemnifying party shall
not be obligated to pay the fees and expenses of more than one counsel
or firm of counsel for all parties indemnified by such indemnifying party in respect of such
claim.

          (d) If for any reason the foregoing indemnity is unavailable, then the indemnifying party
shall contribute to the amount paid or payable by the indemnified party as a result of such losses,
claims, damages, liabilities or expenses (i) in such proportion as is appropriate to reflect the
relative benefits received by the indemnifying party on the one hand and the indemnified party on
the other or (ii) if the allocation provided by clause (i) above is not permitted by applicable Law
or provides a lesser sum to the indemnified party than the amount hereinafter calculated, in such
proportion as is appropriate to reflect not only the relative benefits received by the indemnifying
party on the one hand and the indemnified party on the other but also the relative fault of the
indemnifying party and the indemnified party as well as any other relevant equitable
considerations. Notwithstanding the foregoing, no holder of Registrable Securities shall be
required to contribute any amount in excess of the amount such holder would have been required to
pay to an indemnified party if the indemnity under Section 3.5(b) were available. 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. The obligation of any Person to contribute pursuant to this Section 3.5 shall
be several and not joint.

 18 

 

          (e) An indemnifying party shall make payments of all amounts required to be made pursuant to
the foregoing provisions of this Section 3.5 to or for the account of the indemnified party from
time to time promptly upon receipt of bills or invoices relating thereto or when otherwise due or
payable.

          (f) The indemnity and contribution agreements contained in this Section 3.5 shall remain in
full force and effect regardless of any investigation made by or on behalf of a participating
holder of Registrable Securities, its officers, directors, agents or any Person, if any, who
controls such holder as aforesaid, and shall survive the Transfer of Equity Securities by such
holder and the termination of this Agreement for any reason.

     Section 3.6 Holdback Agreements.

          Each Stockholder agrees not to sell, make any short sale of, grant any option for the purchase
of, or otherwise dispose of any securities, other than those Registrable Securities included in
such Registration pursuant to Section 3.1 or 3.2(a) for the seven (7) days prior to and the ninety
(90) days after the effectiveness of the registration statement pursuant to which such offering
shall be made (or such longer periods as may be advised by the underwriter with respect to the
applicable offering but in any event not to exceed thirty (30) days prior to and ninety (90) days
after the effectiveness of such registration statement). The Company agrees that it and its
executive officers will be subject to the holdback period requested by the underwriters of a
Required Registration, if any, pursuant to this Section 3.6 to the extent that such underwriters
determine such holdback by the Company and its executive officers is reasonably necessary for the
successful offering and sale of all Registrable Securities in connection with such registration.

     Section 3.7 Availability of Information.

          The Company shall cooperate with each Stockholder who is a holder of any Registrable
Securities in supplying such information as may be reasonably necessary for such holder to complete
and file any information reporting forms presently or hereafter required by the SEC as a condition
to the availability of an exemption from the Securities Act for the sale of any Registrable
Securities.

     Section 3.8 Information Concerning Stockholders.

It shall be a condition precedent to the obligations of the Company to include the Registrable
Securities of any selling Stockholder in any registration statement or prospectus, as the case may
be, that such selling Stockholder shall take the actions described in this Section 3.8:

          (a) each selling Stockholder that has requested inclusion of its Registrable Securities in any
registration statement shall furnish to the Company in writing all information as may be necessary
to make the information previously furnished to the Company by such Stockholder, in light of the
circumstances under which it was made, not misleading, any other information regarding such
Stockholder and the distribution of such Registrable Securities as may be required to be disclosed
in the prospectus or registration statement under applicable Law or pursuant to SEC comments and
any information otherwise reasonably requested from time to time by the Company to comply with
applicable Law or regulations, including, without limitation, (i) the then current name and address
of such Stockholder(s), (ii) the aggregate

 19 

 

number of Registrable Securities requested to be
registered, (iii) the total number of Registrable Securities then held by such Stockholder(s), (iv)
the intended means of distribution, and (v) any other information required to be disclosed with
respect to such Stockholder or such Stockholder’s Registrable Securities in the registration
statement or related prospectus by the Securities Act;

          (b) each selling Stockholder shall promptly (i) following it becoming aware thereof, notify
the Company of the occurrence of any event that makes any statement made in a registration
statement or prospectus regarding such selling Stockholder untrue in any material respect or that
requires the making of any changes in a registration statement or prospectus so that, in such
regard, it shall not contain any untrue statement of a material fact or omit any material fact
required to be stated therein or necessary to make the statements (in the case of a prospectus, in
light of the circumstances under which they were made), not misleading and (ii) in connection with
providing such notice, provide the Company with such information in its possession as may be
required to enable the Company to prepare a supplement or post-effective amendment to any such
registration statement or a supplement to such prospectus;

          (c) with respect to any registration statement for an underwritten offering, the inclusion of
a Stockholder’s Registrable Securities therein shall be conditioned, at the managing underwriter’s
request, upon the execution and delivery by such Stockholder of an underwriting agreement as may be
negotiated by the Company;

          (d) any sale of any Registrable Securities by any Stockholder shall constitute a
representation and warranty by such Stockholder that the prospectus delivered by such Stockholder
does not as of the time of such sale contain any untrue statement of a material fact relating to
the information expressly provided in writing by such Stockholder for inclusion in such prospectus
and that such prospectus does not as of the time of such sale omit to state any material fact
relating to the information expressly provided in writing by such Stockholder for inclusion in such
prospectus necessary to make the statements in such prospectus, in light of the circumstances under
which they were made, not misleading; and

          (e) no Stockholder shall use, distribute or otherwise disseminate any “free writing
prospectus”, as defined in Rule 405 under the Securities Act, in connection with the sale of
Registrable Shares under the Shelf Registration Statement, without the prior written consent of
the Company.

ARTICLE IV

BOARD OF DIRECTORS OF THE COMPANY

     Section 4.1 Composition.

          (a) At the Effective Time (as defined in the Merger Agreement), the Company shall expand the
size of the Board so that the number of members on the Board is equal to eight (8) and shall
appoint (i) one individual designated by WCAS (the “WCAS Permanent Director”), whose term
ends in 2011 and (ii) another individual designated by WCAS (the “WCAS Temporary
Director”), whose term ends in 2009. WCAS hereby designates Sanjay Swani as the

 20 

 

initial WCAS
Permanent Director and Michael Donovan as the initial WCAS Temporary Director.

          (b) From and after the date hereof, the Company shall use all commercially reasonable efforts
to take all necessary and desirable actions within its control (including calling special board
meetings) so that:

     (i) the number of members on the Board will not exceed eight (8) or such larger number
as may be required to comply with any Laws, rules or regulations including rules and
regulations concerning director independence; and

     (ii) the WCAS Permanent Director will be elected to a seat as a director of the class
whose term ends in 2011 and the WCAS Temporary Director will be elected to a seat as a
director of the class whose term ends in 2009.

          (c) At the next annual meeting of the Company, and thereafter each time the applicable class
of directors comes up for re-election, until the WCAS Directorship Term End Date, the Board shall
recommend that the stockholders of the Company elect to the Board one (1) individual selected by
WCAS to fill the seat of the WCAS Permanent Director. WCAS shall, as promptly as practicable (and
in any event no later than the Selection Date, provided that the Company shall provide WCAS with
written confirmation of the Selection Date 30 days prior to
such date), provide the Board with written notice of the name of the individual so selected by
it, together with such biographical information regarding such individual as the Nominating and
Corporate Governance Committee of the Board may request. Notwithstanding the foregoing provisions
of this Section 4.1(b), if the Nominating and Corporate Governance Committee of the Board shall
determine in its good faith and reasonable judgment (including, without limitation, any failure of
WCAS’s designee to satisfy all legal and regulatory requirements as well as any and all
requirements that may be set forth in the Company’s Code of Business Conduct and Ethics or any
other governing instruments or policies of the Company) to disqualify any designee of WCAS from
service on the Board, then the Board shall not be required to recommend the election of such
individual, and WCAS shall promptly designate a different individual. Nothwithstanding anything to
the contrary set forth herein, if the individual selected by WCAS in accordance with this Section
4.1(c) is not able to serve on the Board or ceases to be affiliated with WCAS, then WCAS shall have
right to select another individual so long as WCAS provides the Company with written notice of the
name of the individual so selected by it (together with such biographical information regarding
such individual as the Nominating and Corporate Governance Committee of the Board may request) at
least 5 days prior to the date on which the Company distributes to its stockholders the proxy
statement relating to the applicable annual meeting.

          (d) The WCAS Temporary Director shall resign from his or her seat as director of the Company
effective as of the close of business on the earlier of the WCAS Directorship Term End Date and
December 31, 2009 (it being understood that such seat may be filled by the remaining directors on
the Board in accordance with Section 5.4(a) of the By-Laws of the Company). WCAS shall cause the
WCAS Temporary Director to comply with this Section 4.1(c).

 21 

 

          (e) The WCAS Permanent Director shall resign from his or her seat as director of the Company
effective immediately on the WCAS Directorship Term End Date (it being understood that such seat
may be filled by the remaining directors on the Board in accordance with Section 5.4(a) of the
By-Laws of the Company). WCAS shall cause the WCAS Permanent Director to comply with this Section
4.1(d).

          (f) Notwithstanding any other provision of this Section 4.1, the Company shall be entitled to
(i) excuse the WCAS Permanent Director and the WCAS Temporary Director from any portion of any
meeting of the Board, (A) when the Board discusses any matters directly relating to the Securities
or the Transaction Documents that could, in the Board’s good faith determination, present a
conflict for the WCAS Permanent Director or the WCAS Temporary Director; or (B) if participation by
the WCAS Permanent Director or the WCAS Temporary Director in such meeting would, in the Board’s
good faith determination, reasonably be expected to waive the attorney/client privilege relating to
communications between the Company and its legal advisors with respect to such matters and (ii)
withhold information from the WCAS Permanent Director and the WCAS Temporary Director delivered to
the Board prior to any meeting of the Board if the Company believes there is a reasonable
likelihood that the receipt of such information by the WCAS Permanent Director or the WCAS
Temporary Director would, in the Board’s good faith determination, create a conflict of interest
for the WCAS Permanent Director of the WCAS Temporary Director in respect of the Securities or the
Transaction
Documents or, if privileged, would, in the Board’s good faith determination, reasonably be
expected to effectively waive the attorney/client privilege of the Company with respect thereto.

     Section 4.2 Vacancy and Removal.

          If, during the period commencing on the date hereof and ending on the WCAS Directorship Term
End Date, a vacancy of the Board seat occupied by the WCAS Permanent Director or the WCAS Temporary
Director occurs for any reason (including death, resignation or removal) the remaining directors on
the Board shall fill such vacancy pursuant to Section 5.4(a) of the By-Laws of the Company with an
individual nominated by WCAS who satisfies the requirements of the Nominating and Corporate
Governance Committee of the Board, to hold such seat (subject to Section 4.1(d)) until the next
annual meeting of the Company at which such seat is up for re-election.

     Section 4.3 Board Observation Rights.

          (a) From and after January 1, 2010 until the WCAS Directorship Term End Date, WCAS shall be
entitled to designate one (1) observer (the “WCAS Observer”) to attend, as a non-voting
observer, all meetings (including participation in telephonic meetings) of the Board. The Company
shall reimburse the WCAS Observer for his or her reasonable out-of-pocket costs incurred in
attending such meetings in person in accordance with the Company’s expense reimbursement policy
applicable to directors in effect from time to time.

          (b) The Company shall provide the WCAS Observer with (i) notice of all meetings of the Board
and (ii) all information delivered to the Directors at the same time such information is
distributed to the Board.

 22 

 

          (c) Notwithstanding any other provision of this Section 4.3, the Company shall be entitled to
(i) excuse the WCAS Observer from any portion of any meeting of the Board, (A) when the Board
discusses any matters directly relating to the Securities or the Transaction Documents that could,
in the Board’s good faith determination, present a conflict for the WCAS Observer; or (B) if the
WCAS Observer’s participation in such meeting would, in the Board’s good faith determination,
reasonably be expected to waive the attorney/client privilege related to communications between the
Company and its legal advisors and (ii) withhold information from the WCAS Observer delivered to
the Board prior to any meeting of the Board if the Company believes there is a reasonable
likelihood that the receipt of such information by the WCAS Observer would, in the Board’s good
faith determination, create a conflict of interest for the WCAS Observer in respect of the
Securities or the Transaction Documents or, if privileged, would, in the Board’s good faith
determination, reasonably be expected to effectively waive the attorney/client privilege of the
Company with respect thereto.

     Section 4.4 Transfer of Preferred Stock by WCAS.

          WCAS’s rights under this Article IV (including, without limitation, any right WCAS may have to
designate a WCAS Permanent Director, WCAS Temporary Director, or WCAS Observer pursuant to the
applicable provisions of this Article IV) shall immediately terminate and expire on the date on
which the Original Stockholders cease to hold, in the aggregate, at least two million (2,000,000)
shares of Qualifying Securities (as adjusted to reflect stock splits, stock dividends, stock
combinations, recapitalizations and like occurrences) (the “WCAS Directorship Term End
Date”).

ARTICLE V

MISCELLANEOUS

     Section 5.1 Entire Agreement.

          This Agreement, including the schedules hereto and any other documents referred to herein
which form a part hereof, contains the entire understanding of the parties hereto with respect to
the subject matter contained herein and therein. This Agreement supersedes all prior agreements
and understandings between the parties with respect to such subject matter.

     Section 5.2 Table of Contents; Captions.

          The table of contents and the Article and Section captions used herein are for reference
purposes only, and shall not in any way affect the meaning or interpretation of this Agreement.

     Section 5.3 Counterparts.

          This Agreement may be executed in two or more counterparts, all of which taken together shall
constitute one instrument.

 23 

 

     Section 5.4 Notices.

          Any notice or other communication required or permitted under this Agreement shall be deemed
to have been duly given (i) five (5) Business Days following deposit in the mails if sent by
registered or certified mail, postage prepaid, (ii) when sent, if sent by facsimile transmission,
if receipt thereof is confirmed by telephone, (iii) when delivered, if delivered personally to the
intended recipient and (iv) two (2) Business Days following deposit with a nationally recognized
overnight courier service, in each case addressed as follows:

          If to the Company, to:

Mobile Mini, Inc.

7420 South Kyrene Road, Suite 101

Tempe, AZ 85283

Fax: (480) 894-6433

Attn: Larry Trachtenberg

and if to any of the Stockholders, to the addresses or facsimile numbers set forth opposite each of
their names on Schedule I attached hereto; or such other addresses or number as shall be furnished
in writing by any such party.

     Section 5.5 Successors and Assigns.

          This Agreement shall be binding upon and inure to the benefit of the Company, the Stockholders
and their respective successors and Permitted Transferees. Any or all of the rights of a
Stockholder under this Agreement may be assigned or otherwise conveyed by any Stockholder only in
connection with a Transfer of Equity Securities which is in compliance with this Agreement;
provided, that notwithstanding any Permitted Transfer, the rights of WCAS pursuant to Article IV of
this Agreement shall not be assignable to any Person (whether or not a Permitted Transferee).

     Section 5.6 Governing Law.

          The interpretation and construction of this Agreement, and all matters relating hereto, shall
be governed by the laws of the State of Delaware, without regard to the principles of conflicts of
laws thereof.

     Section 5.7 Submission to Jurisdiction.

          (a) Each of the parties hereto hereby irrevocably acknowledges and consents that any legal
action or proceeding brought with respect to any of the obligations arising under or relating to
this Agreement may be brought in the courts of the State of New York, County of New York or in the
United States District Court for the Southern District of New York and each of the parties hereto
hereby irrevocably submits to and accepts with regard to any such action or proceeding, for itself
and in respect of its property, generally and unconditionally, the non-exclusive jurisdiction of
the aforesaid courts. Each party hereby further irrevocably waives any claim that any such courts
lack jurisdiction over such party, and agrees not to plead or claim, in any legal action or
proceeding with respect to this Agreement or the transactions contemplated hereby brought in any of
the aforesaid courts, that any such court lacks jurisdiction over such

 24 

 

party. Each party
irrevocably consents to the service of process in any such action or proceeding by the mailing of
copies thereof by registered or certified mail, postage prepaid, to such party, at its address for
notices set forth in Section 5.4, such service to become effective ten (10) days after such
mailing. Each party hereby irrevocably waives any objection to such service of
process and further irrevocably waives and agrees not to plead or claim in any action or
proceeding commenced hereunder or under any other documents contemplated hereby that service of
process was in any way invalid or ineffective. Subject to Section 5.7(b), the foregoing shall not
limit the rights of any party to serve process in any other manner permitted by law. The foregoing
consents to jurisdiction shall not constitute general consents to service of process in the State
of New York for any purpose except as provided above and shall not be deemed to confer rights on
any Person other than the respective parties to this Agreement.

          (b) Each of the parties hereto hereby waives any right it may have under the laws of any
jurisdiction to commence by publication any legal action or proceeding with respect to this
Agreement. To the fullest extent permitted by applicable Law, each of the parties hereto hereby
irrevocably waives the objection which it may now or hereafter have to the laying of the venue of
any suit, action or proceeding arising out of or relating to this Agreement in any of the courts
referred to in Section 5.7(a) and hereby further irrevocably waives and agrees not to plead or
claim that any such court is not a convenient forum for any such suit, action or proceeding.

          (c) The parties hereto agree that any judgment obtained by any party hereto or its successors
or assigns in any action, suit or proceeding referred to above may, in the discretion of such party
(or its successors or assigns), be enforced in any jurisdiction, to the extent permitted by
applicable Law.

          (d) The parties hereto agree that the remedy at law for any breach of this Agreement may be
inadequate and that should any dispute arise concerning any matter hereunder, this Agreement shall
be enforceable in a court of equity by an injunction or a decree of specific performance. Such
remedies shall, however, be cumulative and nonexclusive, and shall be in addition to any other
remedies which the parties hereto may have.

          (e) The prevailing party or parties in any legal action or proceeding brought with respect to
any of the obligations arising under or relating to this Agreement shall be entitled to receive
from the losing party or parties all costs and expenses, including reasonable counsel fees,
incurred by the prevailing party or parties.

     Section 5.8 Waiver of Jury Trial.

          Each of the Company and each Stockholder hereby waives, to the fullest extent permitted by
applicable Law, any right it may have to a trial by jury in respect of any litigation as between
the parties directly or indirectly arising out of, under or in connection with this Agreement or
the transactions contemplated hereby or disputes relating hereto. Each of the Company and each
Stockholder (i) certifies that no representative, agent or attorney of the Company or such
Stockholder has represented, expressly or otherwise that the Company or such Stockholder, as the
case may be, would not, in the event of litigation, seek to enforce the foregoing waiver and (ii)
acknowledges that it, the other Stockholders and the Company have

 25 

 

been induced to enter into this
Agreement by, among other things, the mutual waivers and certifications in this Section 5.8.

     Section 5.9 Third Party Beneficiaries.

          Each party hereto intends that this Agreement shall not benefit or create any right or cause
of action in or on behalf of any Person other than the parties hereto.

     Section 5.10 Confidentiality.

          Each Stockholder hereby agrees that throughout the term of this Agreement it shall keep (and
shall use all commercially reasonable efforts to cause its directors, officers, general and limited
partners, employees, representatives and outside advisors and its Affiliates to keep) all
non-public information received by it relating to the Company (including any such information
received prior to the date hereof) confidential except information which (a) becomes known to such
Stockholder from a source, other than the Company, its directors, officers, employees,
representatives or outside advisors, which source, to the actual knowledge of such Stockholder, is
not obligated to the Company to keep such information confidential or (b) is or becomes generally
available to the public through no breach of this Agreement by such Stockholder. Each of the
Company and each Stockholder agrees that (i) such non-public information may be communicated to the
directors, officers, general and limited partners, employees, representatives, outside advisors and
Affiliates of such Stockholder and (ii) such Stockholder will use all commercially reasonable to
cause its directors, officers, general and limited partners, employees, representatives, outside
advisors or Affiliates to keep such non-public information confidential. Notwithstanding the
foregoing, a Stockholder may disclose non-public information if required to do so upon request for
disclosure pursuant to a federal or state freedom of information statute or by a court of competent
jurisdiction or by any governmental agency; provided however, that, to the extent
permitted by law, prompt notice of such required disclosure be given to the Company prior to the
making of such disclosure so that the Company may seek a protective order or other appropriate
remedy. In the event that such protective order or other remedy is not obtained, the Stockholder
required to disclose the non-public information will disclose only that portion which such party is
legally required to be disclosed and will request that confidential treatment be accorded such
portion of the non-public information.

     Section 5.11 Expenses.

          The Company shall reimburse each of the respective members of its Board who are not employees
of the Company for their reasonable travel and out-of-pocket expenses incurred in connection with
their serving on the Board. Employees of the Company who incur expenses in connection with their
attendance of meetings of the Board in the performance of their duties shall also be reimbursed in
accordance with the Company’s usual expense reimbursement policies.

     Section 5.12 Amendments; Waivers.

          No provision of this Agreement may be amended, modified or waived without the prior written
consent of the holders of more than fifty percent (50%) of the issued and

 26 

 

outstanding Qualifying
Securities, collectively. Notwithstanding the foregoing, the addition of parties to this Agreement
in accordance with its terms shall not be deemed to be an amendment, modification or waiver
requiring the consent of any Stockholder.

     Section 5.13 No Strict Construction.

          The parties hereto have participated jointly in the negotiation and drafting of this
Agreement. In the event any ambiguity or question of intent or interpretation arises, this
Agreement shall be construed as if drafted jointly by all parties hereto, and no presumption or
burden of proof shall arise favoring or disfavoring any party by virtue of the authorship of any
provision of this Agreement.

     Section 5.14 Specific Performance.

          Each of the Company and each Stockholder agrees that irreparable damages would occur to the
Company or such Stockholder, as the case may be, if any of the provisions of this Agreement were
not performed in accordance with their specific terms or were otherwise breached. It is
accordingly agreed that each of the Company and each Stockholder shall be entitled to seek an
injunction or injunctions to prevent actual breaches of this Agreement by the Company or the
Stockholders, as the case may be, and to enforce specifically the terms and provisions hereof in
the courts referenced in Section 5.7 (or, on a preliminary basis in order to preserve the status
quo pending a decision of the courts referenced in Section 5.7, or in order to enforce a judgment
of the courts referenced in Section 5.7, in any court of competent jurisdiction), in addition to
having any other remedies to which the Company or such Stockholder is entitled at law or in equity
and without the necessity of proving damages or posting a bond or other security.

*       *       *

 27 

 

          IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the date first set
forth above.

	 	 	 	 	 	 	 
	 	 	WCAS:	 	 
	 
	 	 	 	 	 	 
	 	 	WELSH, CARSON, ANDERSON & STOWE X, L.P.	 	 
	 
	 	 	 	 	 	 
	 	 	By: WCAS X Associates LLC, its General Partner	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Sanjay Swani	 	 
	 

	 	Name:
	 	 

Sanjay Swani
	 	 
	 

	 	Title:
	 	Managing Member	 	 

(Signature Page to Stockholder Agreement)

 

 

	 	 	 	 	 	 	 
	 	 	DE NICOLA HOLDINGS, L.P.	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Anthony de Nicola	 	 
	 

	 	Name:
	 	 

Anthony de Nicola
	 	 
	 

	 	Title:
	 	General Partner	 	 

(Signature Page to Stockholder Agreement)

 

 

	 	 	 	 	 	 	 
	 	 	WCAS CAPITAL PARTNERS IV, L.P.	 	 
	 
	 	 	 	 	 	 
	 	 	By: WCAS CP IV Associates LLC, its General Partner	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Sanjay Swani	 	 
	 

	 	Name:
	 	 

Sanjay Swani
	 	 
	 

	 	Title:
	 	Managing Member	 	 
	 
	 	 	 	 	 	 
	 	 	WCAS MANAGEMENT CORPORATION	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Sanjay Swani	 	 
	 

	 	Name:
	 	 

Sanjay Swani
	 	 
	 

	 	Title:
	 	Vice President	 	 

(Signature Page to Stockholder Agreement)

 

 

	 	 	 	 	 	 	 
	 	 	CALIFORNIA STATE TEACHERS’ RETIREMENT SYSTEM	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Christopher J. Ailman	 	 
	 

	 	Name:
	 	 

Christopher J. Ailman
	 	 
	 

	 	Title:
	 	Chief Investment Officer	 	 

(Signature Page to Stockholder Agreement)

 

 

	 	 	 	 	 	 	 
	 	 	FOXKIRK, LLC	 	 
	 
	 	 	 	 	 	 
	 	 	By: NML Securities Holdings, LLC, its Sole Member	 	 
	 
	 	 	 	 	 	 
	 	 	By: The Northwestern
Mutual Life Insurance Company, its Sole Member	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Richard A. Strait	 	 
	 

	 	Name:
	 	 

Richard A. Strait
	 	 
	 

	 	Title:
	 	Its Authorized Representative	 	 

(Signature Page to Stockholder Agreement)

 

 

	 	 	 	 	 
	 

	 	/s/ Ronald F. Valenta	 	 
	 

	 	 

RONALD F. VALENTA
	 	 

(Signature Page to Stockholder Agreement)

 

 

	 	 	 	 	 	 	 
	 	 	GRANDVIEW HOLDINGS, L.P.	 	 
	 
	 	 	 	 	 	 
	 

	 	By:	 	/s/ James S.
Robertson

	 	 
	 

	 	Name:
	 	James S. Robertson
	 	 
	 

	 	Title:
	 	General Partner	 	 

(Signature Page to Stockholder Agreement)

 

 

	 	 	 	 	 
	 

	 	/s/ Douglas A. Waugaman	 	 
	 

	 	 

DOUGLAS A. WAUGAMAN
	 	 

(Signature Page to Stockholder Agreement)

 

 

	 	 	 	 	 
	 

	 	/s/ Gilbert Gomez	 	 
	 

	 	 

GILBERT GOMEZ
	 	 

(Signature Page to Stockholder Agreement)

 

 

	 	 	 	 	 
	 

	 	/s/ James Martell	 	 
	 

	 	 

JAMES MARTELL
	 	 

(Signature Page to Stockholder Agreement)

 

 

	 	 	 	 	 	 	 
	 	 	LEHMAN BROTHERS CO-INVESTMENT PARTNERS L.P.	 	 
	 
	 	 	 	 	 	 
	 	 	By: Lehman Brothers Co-Investment Associates L.P.,
its general partner	 	 
	 
	 	 	 	 	 	 
	 	 	By: Lehman Brothers Co-Investment Associates L.L.C.,
its general partner	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Ashvin Rao	 	 
	 

	 	Name:
	 	 

Ashvin Rao
	 	 
	 

	 	Title:
	 	Senior Vice President	 	 
	 
	 	 	 	 	 	 
	 	 	LEHMAN BROTHERS CO-INVESTMENT CAPITAL PARTNERS L.P.	 	 
	 
	 	 	 	 	 	 
	 	 	By: LB I Group Inc., its general partner	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Ashvin Rao	 	 
	 

	 	Name:
	 	 

Ashvin Rao
	 	 
	 

	 	Title:
	 	Senior Vice President	 	 
	 
	 	 	 	 	 	 
	 	 	LEHMAN BROTHERS CO-INVESTMENT GROUP L.P.	 	 
	 
	 	 	 	 	 	 
	 	 	By: LB I Group Inc., its general partner	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Ashvin Rao	 	 
	 

	 	Name:
	 	 

Ashvin Rao
	 	 
	 

	 	Title:
	 	Senior Vice President	 	 

(Signature Page to Stockholder Agreement)

 

 

	 	 	 	 	 	 	 
	 	 	THE WILSON TRUST DATED AUGUST 24, 2000	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Christopher A. Wilson	 	 
	 

	 	Name:
	 	 

Christopher A. Wilson
	 	 
	 

	 	Title:
	 	Trustee	 	 

(Signature Page to Stockholder Agreement)

 

 

	 	 	 	 	 
	 

	 	/s/ William Armstead	 	 
	 

	 	 

WILLIAM ARMSTEAD
	 	 

(Signature Page to Stockholder Agreement)

 

 

	 	 	 	 	 
	 

	 	/s/ Jeffrey Kluckman	 	 
	 

	 	 

JEFFREY KLUCKMAN
	 	 

(Signature Page to Stockholder Agreement)

 

 

	 	 	 	 	 
	 

	 	/s/ Jody Miller	 	 
	 

	 	 

JODY MILLER
	 	 

(Signature Page to Stockholder Agreement)

 

 

	 	 	 	 	 
	 

	 	/s/ Allan Villegas	 	 
	 

	 	 

ALLAN VILLEGAS
	 	 

(Signature Page to Stockholder Agreement)

 

 

	 	 	 	 	 	 	 
	 	 	MOBILE MINI, INC.	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Lawrence Trachtenberg	 	 
	 

	 	Name:
	 	 

Lawrence Trachtenberg
	 	 
	 

	 	Title:
	 	Executive Vice President	 	 

(Signature Page to Stockholder Agreement)

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