Exhibit 10(f)

3 5  E A S T  W A C K E R  D R I V E
C H I C A G O ,  I L L I N O I S

O
F F I C E  L E A S E  F O R

QUIXOTE CORPORATION
SUITE 1100

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OFFICE LEASE AGREEMENT35 EAST WACKER DRIVE BUILDING
CHICAGO, ILLINOIS

THIS
LEASE AGREEMENT (the "Lease"), is made this 30 day of August, 2003 ("Lease Execution Date"), by and between Landlord and Tenant, as those terms are defined below.

1.     BASIC LEASE PROVISIONS, EXHIBITS AND DEFINITIONS

1.1   Basic Lease Provisions

The provisions of this section are in outline form and are addressed in detail in other paragraphs of this Lease. In the event of any inconsistency or conflict,
the most restrictive paragraph shall control. In this Lease, the following defined terms have the meanings indicated below:



|Period       |  | Monthly Base Rent |           | Annual Base Rent |   | PSF       
|------------ |  | ----------------- | --------- | ---------------- | - | ----------
|LEASE YEAR 1 |  | $                 | 36,750.00 |                  | $ | 441,000.00
|LEASE YEAR 2 |  | $                 | 37,500.00 |                  | $ | 450,000.00
|LEASE YEAR 3 |  | $                 | 38,250.00 |                  | $ | 459,000.00
|LEASE YEAR 4 |  | $                 | 39,000.00 |                  | $ | 468,000.00
|LEASE YEAR 5 |  | $                 | 39,750.00 |                  | $ | 477,000.00
|LEASE YEAR 6 |  | $                 | 40,500.00 |                  | $ | 486,000.00
|LEASE YEAR 7 |  | $                 | 41,250.00 |                  | $ | 495,000.00
|LEASE YEAR 8 |  | $                 | 42,000.00 |                  | $ | 504,000.00
|LEASE YEAR 9 |  | $                 | 42,750.00 |                  | $ | 513,000.00
|             |  |                   |           |                  |   |           

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|LEASE YEAR 10 |  | $ | 43,500.00 |  | $ | 522,000.00 |  | $ | 29.00
|------------- |  | - | --------- |  | - | ---------- |  | - | -----
|LEASE YEAR 11 |  | $ | 44,250.00 |  | $ | 531,000.00 |  | $ | 29.50
|LEASE YEAR 12 |  | $ | 45,000.00 |  | $ | 540,000.00 |  | $ | 30.00
|LEASE YEAR 13 |  | $ | 45,750.00 |  | $ | 549,000.00 |  | $ | 30.50
|LEASE YEAR 14 |  | $ | 46,500.00 |  | $ | 558,000.00 |  | $ | 31.00
|LEASE YEAR 15 |  | $ | 47,250.00 |  | $ | 567,000.00 |  | $ | 31.50





1.2   Exhibits

The Exhibits listed below are attached to and incorporated in this Lease. In the event of any conflict, disagreement, or inconsistency between such Exhibits and
the terms and provisions of this Lease, the terms and provisions of the most restrictive paragraph shall prevail. The Exhibits to this Lease are:

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| | Exhibit A |  |  |  | Premises Diagram              
| | --------- |  | - |  | ------------------------------
| | Exhibit B |  |  |  | Tenant Construction Agreement 
| | Exhibit C |  |  |  | Occupancy Estoppel Certificate
| | Exhibit D |  |  |  | Rules and Regulations         
| | Exhibit E |  |  |  | Fair Market Rental Value      

1.3   Definitions

In addition to those terms defined in Section 1.1 and other sections of this Lease, the following defined terms when used in this Lease have the meanings
indicated:



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2.     PREMISES, TERM AND COMMENCEMENT DATE

Landlord hereby leases to Tenant, and Tenant hereby leases from Landlord, the Premises subject to the terms, covenants, conditions and provisions of this Lease,
together with the non-exclusive right to use the Common Areas, for the Term. If Tenant takes possession of any part of the Premises for the regular conduct of Tenant's business prior to the
Commencement Date with Landlord's prior written consent, all of the covenants and conditions of this Lease will bind both parties with respect to such portion of the Premises, and Tenant will pay Rent
for such portion of the Premises for the period of such occupancy according to Section 4 of this Lease at the rates applicable to the first Lease Year (excluding any periods of excused or free rent,
if any), prorated for the time and portion of the Premises so occupied. No early occupancy under this Section will change the Commencement Date or the Expiration Date.

Landlord
shall deliver vacant possession of the Premises to Tenant including certain of the items (but not all) set forth in Attachment 1 attached hereto ("Landlord's Work")
performed to such an extent that Tenant may commence construction of the Work forty-five (45) days after the date of this Lease (subject to Force Majeure events). In the event Landlord does not
deliver the Premises in such condition, then Landlord will grant Tenant a 2 for 1 day delay of its Rent commencement for every day Landlord fails to deliver the Premises in such condition. In the
event Landlord does not deliver the Premises to Tenant in such condition (subject to Force Majeure events) within one hundred thirty-five (135) days after the date of this Lease, Tenant shall
have, in addition to the other remedies set forth in this Section 2, the right to terminate this Lease by providing written notice to Landlord on or before the one hundred
forty-fifth (145th) day after the Lease Execution Date unless Landlord has cured the default by such date. Landlord's Work shall be substantially complete no later than the Commencement Date.
For the purposes of this Lease, substantially complete shall be defined as all conditions and items set forth in Attachment 1 are completed or installed and are in good working order except for
so-called punch list items that would not materially inhibit the commencement of construction of the Work. In such case, the Commencement Date shall be postponed for a period equal to the delay,
except to the extent that such delays arise primarily from the acts or omissions of Tenant or Tenant's employees, agents or contractors in which case the Commencement Date shall occur on the date that
it would have occurred but for such delay. If the Commencement Date is postponed, the Rent and other obligations of Tenant, and the Term and initial Lease Year hereunder, shall all commence on the
Commencement Date as postponed in which event the Expiration Date set forth in Section 1 shall also be similarly changed. Landlord and Tenant shall confirm in writing any adjustment to the
Commencement Date hereunder upon written request by either party. In the event of any dispute concerning such adjustment, Tenant shall pay Rent commencing on the Commencement Date set forth in
Section 1.1, subject to adjustment between the parties after such dispute is resolved.

3.     TERM COVENANTS & TERM EXPIRATION

3.1   Quiet Enjoyment

Landlord covenants that during the Term Tenant will have quiet and peaceable possession of the Premises against parties claiming by, through or under Landlord,
subject to the terms, covenants, conditions and provisions of this Lease, and Landlord will not disturb such possession except as expressly provided in this Lease.

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3.2   Landlord and Tenant Covenants

Landlord covenants to observe and perform all of the terms, covenants and conditions applicable to Landlord in this Lease. Tenant covenants to pay the Rent when
due, and to observe and perform all of the terms, covenants and conditions applicable to Tenant in this Lease.

3.3   Early Occupancy

Tenant has no right to enter the Premises until Landlord tenders possession. In accordance with Section 2 above, Tenant may occupy the Premises to commence, and
complete, construction of the Work, and for the regular conduct of Tenant's business, prior to the Commencement Date.

3.4   Surrender

Upon the expiration or other termination of the Term, Tenant will immediately vacate and surrender possession of the Premises in good order, repair and condition,
broom clean, except for ordinary wear and tear and damage by casualty. Upon the expiration or other termination of the Term, at Landlord's option, Tenant shall restore the Premises to the same
condition as they were in at the beginning of the Term after the completion of the initial build-out performed in accordance withExhibit Bto this
Lease and after any additional build-out if Tenant exercises either or both of its expansion or contraction options, and remove those additional Alterations installed for or during Tenant's occupancy
from and after the Commencement Date, whether made by Landlord or Tenant, which Landlord either had no right to consent to or specified in its consent to the same that it must be removed at the end of
the Term, shall request Tenant to remove. Upon expiration or other termination of the Term, Tenant shall remove all of Tenant's trade fixtures, office furniture, office equipment and other personal
property. Tenant will pay Landlord on demand the reasonable, documented cost of repairing any damage to the Premises or Building caused by the installation or removal of any such items. Any of
Tenant's property remaining in the Premises will be conclusively deemed to have been abandoned by Tenant and may be appropriated, stored, sold, destroyed or otherwise disposed of by Landlord without
notice or obligation to account to or compensate Tenant, and Tenant will pay Landlord on demand all costs incurred by Landlord relating to such abandoned property. Tenant's obligations under this
Section 3.4 shall survive any termination of this Lease or expiration of the Term.

3.5   Holding Over

Tenant understands that it does not have the right to hold over at any time and Landlord may exercise any and all remedies at law or in equity to recover
possession of the Premises, as well as any damages incurred by Landlord, due to Tenant's failure to vacate the Premises and deliver possession to Landlord as required by this Lease provided that
Tenant shall have the right to holdover for up to two (2) months after the expiration of the initial or any renewal Term. Such holdover shall be upon the same terms and conditions of this
Lease, including Rent, as were applicable to the last month of the Lease Term or renewal Term, as the case may be. After such two (2) months, Tenant's liability shall be the greater of the then
fair market Rent or 125% of the Rent (Base Rent and Additional Rent) last in effect. If Tenant holds over for longer than two (2) months, Tenant shall thereafter be liable for direct (but not
consequential) damages as a result of such holdover. Neither the provisions of this Section 3.5 nor the acceptance by Landlord of any Rent during such holdover period shall operate as a waiver
by Landlord of any right of re-entry hereinbefore provided or as a waiver by Landlord of any right of re-entry hereinbefore provided.

4.     RENT

4.1   Base Rent

Commencing on the Commencement Date and continuing throughout the Term, Tenant agrees to pay in monthly installments in the amount specified for such Lease Year
(or portion) in Section 1, in advance, on or before the first day of each and every month during the Term. However, if the Term commences on other than the first day of a month or ends on other than
the last day of a month, Base Rent for such month will be appropriately prorated.

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4.2   Additional Rent

Tenant agrees to pay Landlord, as Additional Rent, for each Fiscal Year that contains any part of the Term, (i) Tenant's Share multiplied by the difference
between the amount of Expenses for such Fiscal Year less the amount of Expenses payable for the Base Year, as such Expenses for such Fiscal Year and Base Year shall be prorated for partial Fiscal
Years within the Term ("Additional Expenses") and (ii) as an independent and separate payment of Additional Rent, Tenant's Share multiplied by the difference between the amount of Taxes payable
for such Fiscal Year less the amount of Taxes payable for the Base Year, as such Taxes for such Fiscal Year and Base Year shall be prorated for partial Fiscal Years within the Term ("Additional
Taxes"). Additional Expenses and Additional Taxes shall be paid as follows:



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Controllable Additional Expenses Cap.Landlord further agrees i that commencing with the calendar year beginning
January 1, 2005, and continuing during each calendar year of the Term thereafter, the total amount of Additional Expenses actually incurred by Landlord for each such year which are within
Landlord's reasonable control (specifically excluding, without limitation, however, the cost of insurance, utility charges, contracts negotiated pursuant to collective bargaining contracts and special
City of Chicago imposed special requirements, which costs Landlord and Tenant acknowledge are outside of Landlord's reasonable control) shall not be deemed to have increased (and Tenant's estimated
payments with respect to such controllable Additional Expenses shall not be increased) at a rate of increase in excess of three percent (3%), cumulative and compounding, above similar Additional
Expenses within Landlord's reasonable control and actually incurred by Landlord during the prior calendar year. Assume, for example, that controllable Additional Expenses for 2004 were $100.00. In
2005, controllable Additional Expenses shall be an amount equal to the lesser of (i) Tenant's Proportionate Share of controllable Additional Expenses for 2005, or (ii) $103.00 (103% of
$100.00, which amount becomes the "Cap Amount"). In 2006, controllable Additional Expenses shall be an amount equal to the lesser of (i) Tenant's Proportionate Share of controllable Additional
Expenses for 2006, or (ii) $106.09 (103% of $103.00, which amount becomes the new Cap Amount).

4.3   Other Taxes

Tenant will reimburse Landlord within 30 days after receipt of written notice from Landlord for any and all taxes payable by Landlord (other than net income taxes
and taxes included in Taxes) whether or not now customary or within the contemplation of Landlord and Tenant: (a) upon, measured by or reasonably attributable to the cost or value of Tenant's
equipment, furniture, fixtures and other personal property located in the Premises: (b) upon or measured by Rent; (c) upon or with respect to the possession, leasing, operation, management,
maintenance, alteration, repair, use or occupancy by Tenant of the Premises or any portion of the Premises; and (d) upon this transaction or any document to which Tenant is a party creating or
transferring an interest or an estate in the Premises; provided, however, Landlord's notice shall include documentation reasonably necessary for Tenant to calculate the amount of such taxes due. In
the event that Landlord receives or has received a reduction, credit or abatement of Taxes (via an adjustment to assessed value or otherwise) arising out of special application based on the historical
nature of this Building (as in the special property tax classification of "L") (a "Special Tax Reduction") the Special Tax Reduction shall accrue to the sole benefit of Landlord and shall not reduce
Taxes nor accrue to the direct or indirect benefit of any tenants of the Building.

4.4   Terms of Payment

All Base Rent, Additional Rent and other monies due under this Lease shall be deemed Rent and shall be paid to Landlord at the address as set forth in Section 1 in
lawful money of the United States of America, or to such other person or at such other place as Landlord may from time to time designate in writing, without notice or demand and without right of
deduction, abatement or setoff, except as otherwise expressly provided in this Lease. If during the Term, as it may be extended, Landlord receives 2 or more checks from Tenant which are returned by
Tenant's bank for insufficient funds or any other reason, Landlord may require that all checks thereafter be bank certified or cashier's

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checks
(without limiting Landlord's other remedies). All bank service charges resulting from any bad checks shall be borne by Tenant.

4.5   Late Payments

All amounts payable under this Lease by Tenant to Landlord, if not paid within five (5) business days after notice from Landlord that the same is due,
(i) will bear interest from the due date until paid at the lesser of the highest interest rate permitted by law or 5% in excess of the then-current Prime Rate (the "Default Rate"), and
(ii) beginning with the fourth (4th) time in any consecutive twelve (12) month period when Tenant has been delinquent, Tenant shall also pay Landlord a late payment charge of 5% of the amount
not paid when due as Rent.

4.6   Right to Accept Payments

No receipt by Landlord of an amount less than Tenant's full amount due will be deemed to be other than payment "on account", nor will any endorsement or statement
on any ch eck or any accompanying letter effect or evidence an accord and satisfaction. Landlord may accept such check or payment without prejudice to Landlord's right to recover the balance or pursue
any right of Landlord. No payments by Tenant to Landlord after the expiration or other termination of the Term, or after the giving of any notice by Landlord to Tenant, will reinstate, continue or
extend the Term or make ineffective any notice given to Tenant prior to such payment. After notice or commencement of a suit, or after final judgment granting Landlord possession of the Premises,
Landlord may receive and collect any sums of Rent due under this Lease, and such receipt will not void any notice or in any manner affect any pending suit or any judgment obtained.

5.     CONDITION OF PREMISES

Except as may be expressly set forth in this Lease, includingExhibit B, Tenant acknowledges that neither
Landlord, nor any employee, agent or contractor of Landlord has made any representation or warranty concerning the Land, Building, Common Areas or Premises, or the suitability of either for the
conduct of Tenant's business. By taking possession of the Premises hereunder, Tenant accepts the Premises as being in good order, condition and repair, and otherwise "As-Is", "Where-Is" and with all
faults, known or unknown, subject to the completion of any punchlist work relating to the Base Building Work. The Premises do not include any areas above the finished ceiling (or the area above where
a traditional finished drop ceiling would be located if the Premises contain an "unfinished" open "loft" ceiling) or below the finished floor covering installed in the Premises or any other areas not
explicitly shown onExhibit Aas being part of the Premises. In addition, Landlord reserves, for Landlord's exclusive use, any of the following
(other than those installed for Tenant's exclusive use) that may be located in the Premises: janitor closets, stairways and stairwells; fan, mechanical, electrical, telephone and similar rooms; and
elevator, pipe and other vertical shafts, flues and ducts. Landlord, at its sole cost and expense, shall, however, be responsible for the repair of any structural and latent defects in the Building
during the Term, including any renewals.

6.     USE AND OCCUPANCY

6.1   Use



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6.2   Compliance



6.3   Occupancy

Tenant will not do or permit anything which obstructs or interferes with other tenants' rights or with Landlord's providing Building services, or which injures or
annoys (to an unreasonable extent) other tenants. Tenant will not cause, maintain or permit any nuisance in or about the Premises and will keep the Premises free of debris, and anything of a
dangerous, noxious, toxic or offensive nature or which could create a fire hazard, general hazard, nuisance, or undue vibration, heat or noise. Tenant will not make or permit any use of the Premises
which may jeopardize any insurance coverage, increase the cost of insurance or require additional insurance coverage. If by reason of Tenant's failure to comply with the provisions of this Section 6.3
any insurance coverage is reasonably jeopardized, then Landlord will have the option to terminate this Lease or if insurance premiums are increased, then Landlord may require Tenant to immediately pay
Landlord as Rent the amount of the increase in insurance premiums; provided, however, in either event, except if coverage has been terminated in which case no notice shall be required, Landlord shall
first provide Tenant with written notice of such increase in insurance premiums for, or potential loss of, insurance coverage, and Tenant shall have 30 days in which to cure the action causing the
increase in insurance premiums for, or potential loss of, insurance coverage.

7.     SERVICES AND UTILITIES

7.1   Landlord's Standard Services

During the Term, Landlord will operate and maintain the Building in a first-class condition, in compliance with all applicable Laws which are not the obligation of
Tenant and provide maintenance and upkeep of the Building consistent with renovated Class B properties in downtown Chicago, Illinois area. Additionally Landlord shall provide 24 hour

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manned
security in the lobby and throughout the Building consistent with renovated Class B properties in downtown Chicago, Illinois area. Landlord will provide the following services according
to such standards, the costs of which will be included in Expenses to the extent provided in Section 1.3G:



|Temperature                |  | Heating Season                             |  | Cooling Season                 
|-------------------------- |  | ------------------------------------------ |  | -------------------------------
|Outside:                   |  | -6 degrees F db                            |  | 91 degrees F db/78 degrees F wb
|Inside:                    |  | 72 degrees F db
35%RH+/-20%                |  | 75 degrees F db
50%RH+/-5%     
|Discharge Air Temperature: |  |                                            |  | 55 degrees                     
|Fresh Air                  |  | Per ASHRE 1999-
62 Standard (0.14 CFM/USF) |  |                                

Noise Limitation: The operation of the HVAC equipment shall not exceed NC-35.

Air
Filtration: Air supply shall be filtered with a minimum efficiency of 65% per ASHRE STANDARD 52-76.

Controls:
The HVAC controls shall be a Digital Control system at the floor fan only, and a pneumatic system at the VAV boxes located throughout the floor, including automatic
summer/winter changeover.

As
used in this Lease, "Customary Office Equipment" shall include only calculators, dictation recorders, basic desk top personal computers of not more than one per person with an
associated small desktop printer/scanner and such other customary office equipment as reasonably determined by Landlord; but, and notwithstanding anything to the contrary, will not include any
machines, devices or equipment that adversely affect the temperature otherwise maintained in the Premises as reasonably determined by Landlord such as data processing, computer servers, computer
main-frames, telephone switching equipment, or heavy-duty computer or reproduction equipment. If Tenant requires heating or airconditioning for the Premises outside Business Hours, Landlord will
furnish the same for the hours specified in a request from Tenant (which request will be made at the time and in the manner reasonably designated by Landlord for such requests from time to time), and
for this service Tenant will pay Landlord, within 10 days after the date of Landlord's invoice, the hourly rate reasonably determined by Landlord from time to time. After hours charges at Landlord's
actual cost for heating and cooling rates are available from the Landlord's managing agent, and are subject to subsequent change.



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Landlord
shall use commercially reasonable efforts to provide all of the services described above in thisSection 7.1on a continuous and
uninterrupted basis so that Tenant may operate its business operations from the Premises without interruption.

7.2   Electricity





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7.3   Additional Services



7.4   Interruption of Services

If any of the services provided for in this Section 7 are interrupted or stopped, Landlord will use reasonable due diligence to resume the service; provided,
however, no irregularity or stoppage of any of these services will create any liability for Landlord (including, without limitation, any liability for damages to Tenant's personal property or business
caused by any such irregularity or stoppage or create any consequential or other damages of any kind or nature recoverable against Landlord or its agents), or cause any abatement of the Rent
payable under this Lease or in any manner or for any purpose relieve Tenant from any of its obligations under this Lease, unless due to the negligence of Landlord. If, due to reasons within Landlord's
exclusive and reasonable control to remedy (provided such unavailability is not caused in whole or in part by Tenant, Tenant's Affiliates, invitees or contractors or any of their respective agents or
employees in which case there shall be no abatement), any of the utility services required to be exclusively provided by Landlord under this Section 7 remains unavailable for a period in excess of 5
consecutive business days after written notice of such unavailability from Tenant to Landlord, and if such unavailability should render at least 25% or more of the Premises unoccupiable for the normal
conduct of its business ("Untenantable"), then retroactive to the beginning of such 5 business day period, Tenant's Rent will equitably abate in proportion to the portion of the Premises so rendered
Untenantable as compared to the entire Premises for so long as such services remain wholly unavailable for such reasons. Without limiting those reasons for an irregularity or stoppage of
services that may be beyond Landlord's control, any such irregularity or stoppage that is required in order to comply with any Laws or due to an event of Force Majeure, will be deemed caused by
a reason beyond Landlord's control and which there shall not be any Rent abatement.

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8.     REPAIRS

8.1   Repairs Within the Premises

Subject to the terms of Sections 6, 7.1A, 12 and 14, and except to the extent Landlord is required or elects to perform or pay for certain maintenance or
repairs according to those Sections, Tenant shall, at Tenant's own expense, promptly and adequately repair all damage to the Premises and replace or repair all fixtures, equipment and portions of the
plumbing or electrical systems in the Premises that are damaged or broken.

8.2   Failure to Maintain Premises

If Tenant fails to perform any of its obligations under Section 8.1, then Landlord may exercise its self-help remedy set forth in Section 20.2 D
below and Tenant will pay as Rent to Landlord the reasonable, documented cost of such performance, including an amount equal to 12.5% of the cost of such performance, within 10 days after the date of
Landlord's invoice. For purpose of performing such obligations, or to inspect the Premises, Landlord may enter the Premises upon not less than 24 hours' prior written notice to Tenant (except
in cases of actual or suspected emergency, in which case no prior notice will be required) without liability to Tenant for any loss or damage incurred as a result of such entry, provided that Landlord
will take all reasonable steps in connection with such entry to minimize any disruption to Tenant's business or its use of the Premises.

8.3   Notice of Damage

Tenant will notify Landlord promptly after Tenant learns of (a) any fire or other casualty in the Premises; (b) any damage to or defect in the
Premises, including the fixtures and equipment in the Premises, for the repair of which Landlord might be responsible; and (c) any damage to or defect in any parts of appurtenances of the
Building's sanitary, electrical heating, air conditioning, elevator or other systems located in or passing through the Premises.

9.     ALTERATIONS

9.1   Alterations by Tenant

Tenant may from time to time at its own expense make changes, additions, repairs and improvements to the Premises (individually or collectively referred to as
"Alterations") to better adapt the same to its business, provided that any and all such Alterations : (a) will comply with all applicable Laws and Tenant will provide Landlord with
permits evidencing same; (b) will be made only with the prior written consent of Landlord, which consent will not be unreasonably withheld (Tenant shall be permitted to perform non-structural
and non-Building systems Alterations that do not affect another tenant's premises without prior written permission, so long as Tenant notifies Landlord as to the identity of the vendor and such vendor
is a licensed, union vendor; (c) will equal or exceed Building standard; (d) will be carried out only by persons selected by Tenant and approved in writing by Landlord, who will if
required by Landlord deliver to Landlord before commencement of the Alterations performance and payment bonds; (e) do not affect the capacity, maintenance, operating cost or integrity of the
Building's structure or any of its heating, ventilating, air conditioning, plumbing, mechanical, electrical, communications or other systems; (f) is approved by the holder of any Encumbrance if
so required by the terms of said Encumbrance; (g) does not violate any agreement which affects the Building or binds Landlord; and (h) does not alter the exterior of the Building in any
way. Tenant will maintain, or will cause the persons performing any such Alterations to maintain, workers' compensation insurance, completed operations coverage, builder's risk and public liability
and property damage insurance (with Landlord named as an additional insured) in amounts, with co mpanies and in a form reasonably satisfactory to Landlord, which insurance will remain in effect during
the entire period in which the Alterations will be carried out. Only union labor will be permitted to perform Alterations. If requested by Landlord, Tenant will deliver to Landlord proof of all such
insurance. Tenant will promptly pay, when due, the cost of all such Alterations and, upon completion, Tenant will deliver to Landlord, to the extent not previously received by Landlord, evidence of
payment, contractors' affidavits and full and final waivers of all liens for labor, services or materials. Tenant will also pay any increase in Taxes on, or fire or casualty insurance premiums for,
the Building attributable to such Alterations and the cost of any modifications to the Building outside the Premises that are required to be made in order to make the Alterations to the Premises.
Tenant, at its expense, will have promptly prepared and submitted to Landlord reproducible as-built CAD plans of any such Alterations upon their completion. All Alterations to the Premises, whether
temporary or permanent in character, made or paid for by Landlord or Tenant

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will,
without compensation to Tenant, become Landlord's property upon installation, subject to Section 3.4. In order that the Premises' heating, ventilating and cooling systems (HVAC) are
compatible with the Building's systems, Tenant shall either retain as its mechanical contractor the Building's mechanical contractor from time to time, of if it retains its own mechanical contractor,
such contractor shall coordinate with the Building's mechanical contractor and Tenant shall pay the Building's mechanical contractor a fee of $.15 per Rentable Square Foot of the Premises for
supervision and oversight. All work done by Tenant or its contractors (which contractors will be subject to Landlord's reasonable approval) will be done in a first-class workmanlike manner using only
grades of materials at least equal in quality to Building standard materials and will comply with all insurance requirements and all applicable Laws and to the extent Tenant damages any Building
system or structure, or its repairs require such Building system or structure to be repaired or modified, such repairs or modifications shall also be performed at Tenant's sole cost and expense.

9.2   Alterations by Landlord

Landlord may from time to time make repairs, changes, additions and improvements to the Building, Common Areas and those Building systems necessary to provide the
services described in Section 7, and for such purposes Landlord may enter the Premises upon not less than 24 hours' prior written notice to Tenant (except in cases of actual or suspected
emergency, in which case no prior notice will be required) without liability to Tenant for any loss or damage incurred as a result of such entry. In performing such repairs, alterations, improvements
and additions, Landlord will take reasonable steps in connection with such entry to minimize any disruption to Tenant's business or its use of the Premises. No permanent change, addition or
improvement made by Landlord will materially impair access to the Premises, however Landlord may temporarily close doors, entryways, public space and corridors within the Building and to interrupt or
temporarily suspend services and facilities without being deemed or held guilty of an eviction of Tenant or for damages to Tenant's property, business or person, and the Rent reserved herein shall in
no way abate while said repairs, alterations, improvements or additions are being made, and Tenant shall not be entitled to maintain any set-off or counterclaim for damages of any kind against
Landlord for any reason thereto. Landlord may, at its option, make all such repairs, alterations, improvements or additions in and about the Building and the Premises during ordinary Business Hours,
but shall use reasonable efforts to have the same done at times that will not interfere with Tenant's use of the Premises provided Tenant shall pay for any reasonable and actual resulting overtime and
additional expenses.

10.   LIENS

Tenant shall pay as and when due all costs for work, services or materials furnished to Tenant for the Premises. Tenant will keep title to the Land and Building
free and clear of any lien. Tenant will immediately notify Landlord of the filing of any such lien or any pending claims or proceedings relating to any such lien. In case any such lien attaches,
Tenant agrees to cause it to be released and removed of record within 20 days after its filing (failing which Landlord may do so at Tenant's sole expense), unless Tenant has a good faith
dispute as to such lien in which case Tenant may diligently contest such lien by appropriate proceedings so long as Tenant either (i) deposits with Landlord a bond or other security in an amount
reasonably acceptable to Landlord which in all cases shall be 110% of the disputed amount, or (ii) obtains a title endorsement from a title insurance company acceptable to Landlord insuring
over the lien. Upon final determination of any permitted contest, Tenant will immediately pay any judgment rendered and cause the lien to be released together with obtaining title insurance evidencing
the same.

11.   INSURANCE

11.1During the Term, Tenant will provide and keep in force the following insurance obtained from insurance companies authorized to do
business in the State of Illinois having a Policyholders Rating of at least A and a Financial Rating of at least 6 as rated by the most recent edition of Best's Insurance Reports:



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Landlord,
the holder of any Encumbrance and any other entity requested by Landlord will be named as an additional insureds in the liability policy described in this Section, which will
include cross liability and severability of interests clauses and will be on an "occurrence" (and not a "claims made") form. Landlord, the holder of any Encumbrance and any other entity requested by
Landlord will be named as a loss payee, as its interest may appear, in the policies described in Sections 11B and 11C, and all policies will waive all rights of subrogation. Tenant's insurance
policies will provide a minimum of 30 days' notice to Landlord prior to change or cancellation (ten (10) days for non-payment of premium) and will otherwise be upon such terms and conditions as
Landlord from time to time reasonably requires. Tenant will file with Landlord, on or before the Commencement Date and at least 30 days before the expiration date of expiring policies, such copies of
either current policies, an insurance binder (countersigned by the insurer), Evidence of Insurance (in form Accord 27) or a binding certificate, or other proofs, as may be reasonably required
to establish Tenant's insurance coverage in effect from time to time and payment of premiums. If Tenant fails to insure or pay premiums, or to file satisfactory proof as required, Landlord may, upon a
minimum of 48 hours' notice, effect such insurance and recover from Tenant, as additional Rent, on demand any premiums paid, unless Tenant shall first provide Landlord with evidence of such insurance
coverage. Tenant's insurance shall be primary, and any insurance maintained by Landlord or any other additional insureds hereunder shall be excess and noncontributory. Landlord shall have the right to
reasonably increase the amount or expand the scope of insurance to be maintained by Tenant hereunder from time to time by providing Tenant with written notice at least 30 days prior to the effective
date of such additional insurance requirements.

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11.2Landlord and Tenant, in the exercise of their commercial business judgment, acknowledge that the use of insurance is the best way to
protect against the risk of loss to their respective properties and economic interests in the Building and the Premises. Accordingly, Landlord and Tenant agree that in the event of loss or damage to
their respective properties or interests, such loss will be satisfied first by the insurance proceeds paid to the party suffering the loss, next by the party suffering the loss to the extent it was
not maintaining the insurance required hereunder that would have been payable had the insurance required hereunder been carried by such party, and finally, by the party causing the loss or damage.
Without limiting the waiver of subrogation required in Section 11.1, Landlord and Tenant agree that if and to the extent that, the Landlord and Tenant Act (765 ILCS 705/0.01 et seq.)
(the "Act"), is either repealed, judicially interpreted or legislatively amended to permit full waiver of claims between landlords and tenants in leases such as this Lease, then effective thereafter,
Landlord and Tenant waive all claims against the other, and their respective Affiliates, for any loss, damage or injury, notwithstanding the negligence of either party in causing a loss.

11.3Landlord will maintain "all-risk" replacement cost property damage insurance on the shell and core of the Building.

12.   DAMAGE OR DESTRUCTION

12.1 Termination Options

If the Premises or the Building are damaged by fire or other casualty Landlord will, promptly after learning of such damage, notify Tenant in writing of the time
necessary to repair or restore such damage, as estimated by Landlord's architect, engineer or contractor. If such estimate states that repair or restoration of substantially all of such damage that
was caused to the core and shell of the Building cannot be completed within 270 days from the date of such damage (or within 90 days from the date of such damage if such damage occurred
within the last 12 months of the Term), then Tenant will have the option to terminate this Lease, provided it does so in strict accordance with this Lease. If such estimate states that repair
or restoration cannot be substantially completed within 270 days from the date of such damage, or if such damage occurred within the last 12 months of the Term and such estimate states
that repair or restoration cannot be substantially completed within 90 days from the date of such damage, or if such damage is not insured against by insurance policies required to be
maintained, and in fact maintained by Landlord, or if Landlord cannot restore because of Laws or because the insurance proceeds were not made available to Landlord, then Landlord will have the option
to terminate this Lease. Any option to terminate granted above must be exercised by written notice to the other party given within 10 days after Landlord delivers to Tenant the notice of
estimated repair time. If either party exercises its option to terminate this Lease, the Term will expire and this Lease will terminate 10 days after notice of termination is delivered;
provided, however, that Rent for the period commencing on the date of such damage until the date this Lease terminates will abate during such period in accordance with the provisions of
Section 12.3 and Landlord will be entitled to all proceeds of the insurance policy described in Section 11 applicable to any damaged Alterations or deco rations in the Premises whether
paid for by Landlord or Tenant.

12.2 Repair Obligations

If the Premises or the Building are damaged by fire or other casualty and neither party terminates this Lease pursuant to Section 12.1 or neither party is
entitled to terminate this Lease on account of such casualty, then Landlord will repair and restore only such damage to the Building and reinstall the Base Building Work, with reasonable promptness,
subject to delays for insurance adjustments and delays caused by Force Majeure, the Tenant and the Tenant Parties. Landlord will have no liability to Tenant and Tenant will not be entitled to
terminate this Lease if such repairs and restoration are not in fact completed within the estimated time period, provided that Landlord promptly commences and diligently pursues such repairs and
restoration to completion. In no event will Landlord be obligated to repair, restore or replace any of the property required to be insured by Tenant according to Section 11; Tenant agrees to
repair, restore or replace such property as soon as is reasonably possible, to at least the condition existing prior to its damage, using materials at least equal to Building standard. However, in
connection with its repair and restoration of such damage, Landlord may, in its reasonable discretion, elect to repair and restore the damage, if any, caused to any or all of the leasehold
improvements and Alterations required to be insured by Tenant according to Section 11. If Landlord makes such election, Tenant shall assign and Landlord will be entitled to all proceeds of the
insurance policy described in Section 11 applicable to the leasehold improvements Landlord so elects to repair or restore, plus Tenant shall pay Landlord the amount of any deductible under the
applicable insurance policy.

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12.3 Rent Abatement

If any fire or casualty damage renders the Premises Untenantable and if this Lease is not terminated according to Section 12.1, then Rent will abate
beginning on the date of such damage. Such abatement will end on the date Landlord has redelivered the Premises to Tenant after having completed the repairs and restoration Landlord is required to
perform according to Section 12.2.

13.   INDEMNITIES

13.1 Tenant's Indemnification

A party's "Parties" means that party's parent, subsidiary and affiliated corporations and its and their successors, assigns, partners, ventures, directors,
officers, shareholders, agents, servants, contractors and employees. Without limitation of any other provisions hereof, and except in situations where Landlord has been negligent or has acted with
willful misconduct, Tenant shall protect, defend, indemnify and save Landlord and Landlord's Parties harmless from and against any and all obligations, liabilities, costs, damages, claims and expenses
of whatever nature arising from injury to persons or damage to property brought or asserted by third parties unaffiliated with the Tenant or the Tenant's Parties that arise solely out of or in
connection with the acts or omissions of Tenant on the Premises pursuant to this Lease.

13.2 Landlord's Indemnification

Without limitation of any other provisions hereof, and except in situations where Tenant has been negligent or has acted with willful misconduct, Landlord shall
protect, defend, indemnify and save Tenant and Tenant's Parties harmless from and against any and all obligations, liabilities, costs, damages, claims and expenses of whatever nature arising from
injury to persons or damage to property brought or asserted by third parties unaffiliated with the Landlord or the Landlord's Parties that arise solely out of or in connection with the acts or
omissions of Landlord on the Common Areas, Building, or the Land pursuant to this Lease.

14.   CONDEMNATION

14.1 Full Taking

If all or substantially all of the Building or Premises are permanently taken for any public or quasi-public use under any applicable Laws or by right of eminent
domain, or are sold to the condemning authority in lieu of condemnation, then this Lease will terminate as of the date the earlier of when the condemning authority takes physical possession of or
title to the Building or Premises.

14.2 Partial Taking



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14.3 Awards

As between the parties to this Lease, Landlord will be entitled to receive, and Tenant assigns to Landlord, all of the compensation awarded upon taking of any part
or all of the Building or Premises, including any award for the value of the unexpired Term. However, Tenant may assert a claim in a separate proceeding against the condemning authority for any
damages resulting from the taking of Tenant's trade fixtures or personal property, or for moving expenses, business relocation expenses or damages to Tenant's business incurred as a result of such
condemnation so long as the same will not diminish the award payable to Landlord.

15.   ASSIGNMENT AND SUBLETTING

15.1 Limitation

Without Landlord's prior written consent, Tenant will not assign all or any of its interest under this Lease, sublet all or any part of the Premises, encumber its
interest in this Lease or the Premises or permit the Premises to be used by any parties other than Tenant and its employees.

15.2 Notice of Proposed Transfer; Landlord's Options

If Tenant desires to enter into any assignment of this Lease or a sublease of all or any part of the Premises, Tenant will first give Landlord written notice of
the proposed assignment or sublease, which notice will contain the name and address of the proposed transferee, the proposed use of the Premises, statements reflecting the proposed transferee's
current financial condition and income and expenses for the past 2 years (if available), a copy of the fully executed proposed assignment or sublease and any other information reasonably requested by
Landlord. Tenant shall pay Landlord's reasonable, actual costs and attorneys' fees for review of the assignment or subletting documentation (whether such request is approved or denied) not to exceed
$1,500.00 for the first 5 years of the Term, 2,000.00 for the next 5 years of the Term and $2,500.00 for the final 5 years of the initial Term.

15.3 Consent Not to Be Unreasonably Withheld

Within 30 days of the receipt of the documentation set forth in Section 15.2 above, Landlord will either consent to or disapprove of the proposed assignment
or sublease. Landlord will not unreasonably withhold, delay, or condition its consent to the proposed assignment or subletting if each of the following conditions is satisfied:



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15.4 Form of Transfer

If Landlord consents to a proposed assignment or sublease, Landlord's consent will not be effective unless and until Tenant delivers to Landlord an original duly
executed assignment or sublease, as the case may be, that provides, in the case of a sublease, that the subtenant will comply with all applicable terms and conditions of this Lease will attorn to
Landlord if this Lease is terminated, and, in the case of an assignment, an assumption by the assignee of all of the terms, covenants and conditions which this Lease requires Tenant to perform.

15.5 Payments to Landlord

If Tenant effects an assignment or sublease, then Landlord will be entitled to receive and collect, either from Tenant or directly from the transferee: 50% of the
amount by which the cash and non-cash consideration required to be paid by the transferee [after deducting from such consideration Tenant's reasonable costs incurred in effecting the
assignment or sublease] exceeds the Rent payable by Tenant to Landlord allocable to the transferred space. Such percentage of such amount will be payable to Landlord at the time(s) Tenant
receives the same from its transferee (whether in monthly installments, in a lump sum, or otherwise).

15.6 Change of Ownership

Any change by Tenant in the form of its legal organization (such as, for example, a change from a general to a limited partnership), any transfer of 51% or more of
Tenant's assets, and any other transfer of interest effecting a change in identity of persons exercising effective control of Tenant will be deemed an "assignment" of this Lease requiring Landlord's
prior written consent. The transfer of any outstanding capital stock of a corporation whose stock is publiclytraded will not, however, be deemed a "transfer of interest" under this
Section 15.6.

15.7 Permitted Transfers

Tenant shall have the right to sublease or assign, without Landlord's approval, to any parent, subsidiary, or affiliated corporation, partnership, or other
business entity (which entity owns or controls, or is owned or controlled by, Tenant) or so long as Tenant is a surviving entity, to a purchaser of all or substantially all of the assets of Tenant or
to any entity succeeding to the business conducted at the Premises (collectively, "Affiliated Entity"); provided, however, if Tenant is not a surviving entity, then Tenant shall have the right to
sublease or assign its Lease to a purchaser of all or substantially all of the assets of Tenant or to any entity succeeding to the business conducted at the Premises, subject to Landlord's approval of
the subtenant or assignee, which approval will not be unreasonably withheld, conditioned, or delayed. Tenant shall retain any profits after any subleasing or assignment to an Affiliated Entity. The
Tenant entity originally named to the Lease shall remain liable notwithstanding any sublease or assignment.

15.8 Effect of Transfers

No subletting or assignment (including a transfer to a Permitted Transferee) will release the initially named Tenant from any of its obligations under this Lease
unless Landlord agrees to the contrary in writing and the initially named Tenant shall remain liable for the obligations under this Lease as a principal and not as a surety. Acceptance of Rent by
Landlord from any person other than Tenant will not be deemed a waiver by Landlord of any provision of this Section 15. Consent to one assignment or subletting will not be deemed a consent to any
subsequent assignment or subletting. In the event of any default by any assignee
or subtenant or any successor of Tenant in the performance of any Lease obligation, Landlord may proceed directly against Tenant without exhausting remedies against such assignee, subtenant

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or
successor. The voluntary or other surrender of this Lease by Tenant or the cancellation of this Lease by mutual agreement of Tenant and Landlord will not work a merger and will, at Landlord's
option, terminate all or any subleases or operate as an assignment to Landlord of all or any subleases; such option will be exercised by notice to Tenant and all known subtenants in the Premises. If
Landlord shall choose to take an assignment of a sublease then the subtenant shall be bound to Landlord for the balance of the Term thereof and shall attorn directly to Landlord under all of the
executory terms of the sublease except that Landlord shall not (a) be liable for any previous act, omission or negligence of Tenant or any counterclaim, defense or offset that results from the
same, (b) be bound by any previous modification or amendment of the sublease made without Landlord's consent or by any previous prepayment of more than one month's Rent, or (c) be obligated to
perform any repairs or other work beyond Landlord's obligation under this Lease. Each subtenant shall execute and deliver such instruments as Landlord may reasonably request to evidence said
attornment.

16.   PERSONAL PROPERTY

16.1 Installation and Removal

Tenant may install in the Premises its personal property (including Tenant's usual trade fixtures) in a proper manner, provided that no such installation will
affect the mechanical, plumbing or electrical systems or the structure of the Building, and provided further that if such installation would require any change, addition or improvement to the
Premises, such installation will be subject to Section 9.1. If no Default then exists, any such personal property installed in the Premises by Tenant (a) may be removed from the Premises
from time to time in the ordinary course of Tenant's business or in the course of making any Alterations to the Premises permitted under Section 9.1, and (b) will be removed by Tenant at
the end of the Term pursuant to Section 3.4. Tenant will promptly repair at its expense any damage to the Building resulting from such installation or removal. The terms of this
Section 16.1 shall survive the expiration of the Term or the earlier termination of this Lease.

16.2 Responsibility

Tenant will be solely responsible for all costs and expenses related to personal property used or stored in the Premises. Tenant will pay any taxes or other
governmental impositions levied upon or assessed against such personal property, or upon Tenant for the ownership or use of such personal property, on or before the due date for payment. Such personal
property taxes or impositions are not included in Taxes.

17.   ESTOPPEL CERTIFICATES

If Landlord requires Tenant to complete an estoppel certificate, Tenant shall have fifteen (15) days to deliver it to Landlord and it shall be in the form
ofExhibit Cattached hereto. If after execution of this Lease Landlord requests a certificate in another form, Tenant shall have twenty (20) days
to deliver and the certificate which shall be reasonably acceptable to Tenant and shall contain only statements of fact as it pertains to this Lease. Landlord shall reimburse Tenant for any legal
costs involved up two (2) hours legal time per request not to exceed $350.00 per hour (as may be reasonably adjusted by mutual agreement of the parties in the future) (in the event the Landlord
requests a certificate different than from the one attached to this Lease). If
Tenant requires Landlord to complete an estoppel certificate, Landlord shall have twenty (20) days to deliver and the certificate which shall be reasonably acceptable to Landlord and shall
contain only statements of fact as it pertains to this Lease. Tenant shall reimburse Landlord for any legal costs involved up two (2) hours legal time per request not to exceed $350.00 per hour
(as may be reasonably adjusted by mutual agreement of the parties in the future). Any such certificate may be relied upon by Landlord, and any prospective purchaser or present or prospective
mortgagee, deed of trust beneficiary, ground lessor, or Tenant of all or a portion of the Building.

18.   TRANSFER OF LANDLORD'S INTEREST

18.1 Sale, Conveyance and Assignment

Nothing in this Lease will restrict Landlord's right to sell, convey, assign or otherwise deal with the Building or Landlord's interest under this Lease.

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18.2 Effect of Sale, Conveyance or Assignment

A sale, conveyance or assignment of the Building will automatically release Landlord from liability under this Lease from and after the effective date of the
transfer, except for any liability relating to the period prior to such effective date; and Tenant will look solely to Landlord's transferee for performance of Landlord's obligations relating to the
period after such effective date. This Lease will not be affected by any such sale, conveyance or assignment and Tenant will attorn to Landlord's transferee.

18.3 Subordination

This Lease is and will be subject and subordinate in all respects to any ground lease, mortgage or deed of trust now or later encumbering the Building, and to all
their renewals, modifications, supplements, consolidations and replacements (an "Encumbrance"). While such subordination will occur automatically, Tenant agrees, upon request by and without cost to
Landlord or any successor in interest, to promptly execute and deliver to Landlord or the holder of an Encumbrance such instrument(s) as may be reasonably required to evidence such subordination. In
the alternative, however, the holder of an Encumbrance may unilaterally elect to subordinate such Encumbrance to this Lease; provided Landlord shall provide Tenant with written notice evidencing same.
Landlord shall supply Tenant with appropriate Non-Disturbance Agreement(s) from any future mortgagee or other holder of superior interest in the Building concurrently with full execution of this
Lease.

18.4 Attornment

If the interest of Landlord is transferred to any person (a "Successor Landlord") by reason of the termination or foreclosure, or proceedings for enforcement, of
an Encumbrance, or by delivery of a deed in lieu of such foreclosure or proceedings, Tenant will immediately and automatically attorn to the Successor Landlord and this Lease will continue in full
force and effect as a direct lease between the Successor Landlord and Tenant, upon all of the same terms, conditions and covenants as stated in this Lease except that a Successor Landlord shall not be
(a) liable for any previous act or omission or negligence of Landlord under this Lease, (b) subject to any counterclaim defense or offset, (c) bound by any previous modification
or amendment of this Lease or by any previous prepayment of more than one month's Rent, unless such modification or prepayment shall have been approved in writing by the holder of any Encumbrance
through or by reason of which the Successor Landlord shall have succeeded to the rights of Landlord under this Lease, or (d) obligated to perform any repairs or other work beyond Landlord's
general maintenance and repair obligations set forth in Section 7 above. Tenant agrees, upon request by and without cost to the Successor Landlord, to promptly execute and deliver to the
Successor Landlord such instrument(s) as may be reasonably required to evidence such attornment.

19.   RULES AND REGULATIONS

Tenant agrees to faithfully observe and comply with the Rules and Regulations set forth inExhibit Dand with all reasonable modifications and additions to such Rules and Regulations from time to time adopted by Landlord and of which Tenant is
notified in writing. No such modification or addition will contradict or abrogate any right expressly granted to Tenant under this Lease. Landlord's enforcement of the Rules and Regulations
will be uniform and nondiscriminatory, but Landlord will not be responsible to Tenant for failure of any person to comply with the Rules and Regulations.

20.   TENANT'S DEFAULT AND LANDLORD'S REMEDIES

20.1 Default

The following shall constitute a "Default" by Tenant under this Lease:



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20.2 Remedies

During the continuance of a Default, Landlord may pursue at its option any one or more of the following rights:



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20.3 Mitigation of Damages

If Landlord is required by applicable Law to mitigate damages under this Lease: (a) Landlord shall be required only to use reasonable efforts to mitigate,
which shall not exceed such efforts as Landlord generally uses to lease other space in the Building, (b) Landlord will not be deemed to have failed to mitigate if Landlord leases any other
portions of the Building before reletting all or any portion of the Premises, and (c) any failure to mitigate as described herein with respect to any period of time shall only reduce the Rent
and other amounts to which Landlord is entitled hereunder by the reasonable rental value of the Premises during such period, taking into account the factors described above. In recognition that the
value of the Building depends on the rental rates and terms of leases therein, Landlord's rejection of a prospective replacement tenant based on an offer of rentals below Landlord's published rates
for new leases of comparable space at the Building at the time in question, or at Landlord's option, below the rates provided in this Lease, or containing terms less favorable than those contained
herein, shall not give rise to a claim by Tenant that Landlord failed to mitigate Landlord's damages.

20.4 Reletting

If this Lease or Tenant's right to possession is terminated, after a Default, Landlord may (i) enter and secure the Premises, change the locks, install
barricades, remove, discard or sell any improvements, fixtures or other property of Tenant therein, perform any decorating, remodeling, repairs, alterations, improvements or additions and take such
other actions as Landlord shall determine in Landlord's sole discretion to prevent damage or deterioration to the Premises or prepare the same for reletting, and (ii) relet all or any portion
of the Premises (separately or as part of a larger space) for any rent, use or period of time (which may extend beyond the Term hereof), and upon any other terms as Landlord shall determine in
Landlord's sole discretion, directly or as Tenant's agent (if permitted or required by applicable Law). Tenant shall not be entitled to receive any consideration received from such reletting.

20.5 Other Matters

No re-entry or repossession, repairs, changes, alterations and additions, reletting, acceptance of keys from Tenant, or any other act or omission of Landlord shall
be construed as an election by Landlord to terminate this Lease or Tenant's right to possession, or accept a surrender of the Premises, nor shall the same operate to release the Tenant in whole or in
part from any of the Tenant's obligations hereunder, unless express written notice of such intention is sent by Landlord or its agent to Tenant. Landlord may bring suits for amounts owed by Tenant
hereunder or any portions thereof, as the same accrue or after the same have accrued, and no suit or recovery of any portion due hereunder shall be deemed a waiver of Landlord's right to collect all
amounts to which Landlord is entitled hereunder, nor shall the same serve as any defense to any subsequent suit brought for any amount not theretofore reduced to judgment. Landlord may pursue one or
more remedies against Tenant and need not make an election of remedies until findings of fact are made by a court of competent jurisdiction. The times set forth herein for the curing of violations by
Tenant are of the essence of this Lease.

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20.6 Bankruptcy Relief

Nothing contained in this Lease will limit or prejudice Landlord's right to prove and obtain as liquidated damages in any bankruptcy, insolvency, receivership,
reorganization or dissolution proceeding, an amount equal to the maximum allowable by any Laws governing such proceeding in effect at the time when such damages are to be proved, whether or not such
amount be greater, equal or less than the amounts recoverable, either as damages or Rent, under this Lease.

21.   Intentionally omitted

22.   BROKERS

Landlord and Tenant represent and warrant that no broker or agent negotiated or was instrumental in negotiating or consummating this Lease except the Brokers.
Neither party knows of any other real estate broker or agent who is or might be entitled to a commission or compensation in connection with this Lease. Landlord will pay all fees, commissions or other
compensation ("Broker Commission") payable to Staubach Midwest LLC pursuant to the terms of a separate agreement. Tenant will indemnify and hold Landlord harmless from all damages paid or
incurred by Landlord resulting from any claims asserted against Landlord by brokers or agents claiming through Tenant other than the Brokers.

23.   LIMITATIONS ON LANDLORD'S LIABILITY

Any liability for damages, breach or nonperformance by Landlord, and notwithstanding anything to the contrary in this Lease, or arising out of the subject matter
of, or the relationship created by, this Lease, will be collectible only out of Landlord's interest in the Building (including insurance and condemnation proceeds) and no personal liability is assumed
by, or will at any time be asserted against, Landlord, its Affiliates, its and their partners, venturers, directors, officers, agents, servants and employees, or any of its or their successors or
assigns; all such liability, if any, being expressly waived and released by Tenant. Landlord's review, supervision, commenting on or approval of any aspect of work to be done by or for Tenant (under
Section 9,Exhibit Bor otherwise) are solely for Landlord's protection and create no warranties or duties to Tenant or to third parties.

24.   NOTICES

All notices required or permitted under this Lease must be in writing and will only be deemed properly given and received (a) when actually given and
received, if delivered in person; (b) 1 business day after deposit with a private courier or overnight delivery service; or (c) 2 business days after deposit in the United States mails,
certified or registered mail with return receipt requested and postage prepaid. In the event delivery is refused by the recipient, then delivery shall be deemed properly given and received when
attempted delivery is made. All such notices must be transmitted by one of the methods described above to the party to receive the notice at, in the case of notices to Landlord, Landlord's Address,
and in the case of notices to Tenant, the applicable Tenant's Notice Address, or, in either case, at such other address(es) as either party may notify the other of according to this Section 24.
Time shall be of the essence for the giving of all notices required or permitted under the provisions of this Lease.

25.   MISCELLANEOUS

25.1 Severability

If any provision of this Lease is declared void or unenforceable by a final judicial or administrative order, this Lease will continue in full force and effect,
except that the void or unenforceable provision will be deemed deleted and replaced with a provision as similar in terms to such void or unenforceable provision as may be possible and be valid and
enforceable.

25.2 Binding Effect

Each of the provisions of this Lease will extend to bind or inure to the benefit of, as the case may be, Landlord and Tenant, and their respective heirs,
successors and assigns, provided this clause will not permit any transfer by Tenant contrary to the provisions of Section 15.

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25.3 Complete Agreement; Modification

All of the representations and obligations of the parties are contained in this Lease and no modification, waiver or amendment of this Lease or of any of its
conditions or provisions will be binding upon a party unless in writing signed by such party. This Lease was drafted jointly with the input and language of both the Landlord and Tenant, and as such no
inference will be drawn against either party for the drafting or construction of any phrase or term.

25.4 Delivery for Examination

Submission of the form of this Lease for examination will not bind Landlord in any manner, and no obligations will arise under this Lease until it is signed by
both Landlord and Tenant and delivery is made to each.

25.5 No Air Rights

This Lease does not grant any easements or rights for light, air or view. Any diminution or blockage of light, air or view by any structure or condition now or
later erected will not affect this Lease or impose any liability on Landlord.

25.6 Intentionally omitted

25.7 Building Name

Tenant will not, without Landlord's consent, which shall not be unreasonably withheld, use Landlord's or the Building's name, or any facsimile or reproduction of
the Building, for any purpose; except that Tenant may use the Building's name in the address of the business to be conducted by Tenant in the Premises. Landlord reserves the right, upon reasonable
prior notice to Tenant, to change the name or address of the Building.

25.8 Building Standard

The phrase "Building standard" will, in all instances, mean the type, brand and/or quality of materials Landlord designates from time to time to be the minimum
quality to be used in the Building or the exclusive type, grade or quality of material to be used in the Building and the then-current standard described in Landlord's most recently published schedule
of Building standard or, if no such schedule has been published, to the standard which commonly prevails in and for the entire Building.

25.9 No Waiver

No waiver of any provision of this Lease will be implied by any failure of either party to enforce any remedy upon the violation of such provision, even if such
violation is continued or repeated subsequently. No express waiver will affect any provision other than the one specified in such waiver, and that only for the time and in the manner specifically
stated.

25.10 Recording; Confidentiality

Tenant will not record this Lease, or a short form memorandum, and any such recording will be a Default. Tenant shall keep the Lease terms, provisions and
conditions confidential and will not disclose them to any other person without Landlord's prior written consent, which shall not be unreasonably withheld. However, Tenant may disclose Lease terms,
provisions and conditions to Tenant's accountants, attorneys, managing employees and others in privity with Tenant, as reasonably necessary for Tenant's business purposes, without such prior consent.

25.11 Captions

The captions of sections are for convenience only and will not be deemed to limit, construe, affect or alter the meaning of such sections.

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25.12 Invoices

All bills or invoices to be given by Landlord to Tenant will be sent to Tenant's Notice Address. Tenant may change Tenant's Notice Address by notice to Landlord
given pursuant to Section 25. If Tenant fails to give Landlord specific written notice of its objections within 60 days after receipt of any bill or invoice from Landlord, such bill or
invoice will be deemed true and correct and Tenant may not later question the validity of such bill or invoice or the underlying information or computations used to determine the amount stated.

25.13 Intentionally omitted

25.14 Authority to Bind

The individuals signing this Lease on behalf of Landlord and Tenant represent and warrant that they are empowered and duly authorized to bind Landlord or Tenant,
as the case may be, to this Lease according to its terms.

25.15 Only Landlord/Tenant Relationship

Landlord and Tenant agree that neither any provision of this Lease nor any act of the parties will be deemed to create any relationship between Landlord and Tenant
other than the relationship of landlord and tenant.

25.16 Covenants Independent

The parties intend that this Lease be construed as if the covenant between Landlord and Tenant are independent and that the Rent will be payable without offset,
reduction or abatement for any cause except as otherwise specifically provided in this Lease.

25.17 Landlord's Rights

Without limiting the foregoing, Landlord reserves the right to: (i) change the name of the Building and address or designation of the Premises or the
Building, (ii) install, maintain, alter and remove signs on or about the exterior and interior of the Building, (iii) add easements or other interests to or eliminate the same from the
Building, and grant easements and other interests and rights in the Building, (iv) add, alter, expand, reduce, relocate or change the Building's shape, size, character, design, appearance, use,
number or height of any permanent or temporary structures, improvements, subterranean and multiple level parking decks, kiosks, planters, parking areas, driveways, landscaped areas and other Common
Areas, and convert Common Areas to leasable areas and leasable areas to Common Areas, (v) add structural support columns that may be required within the Premises or Common Areas,
(vi) relocate any HVAC equipment serving the Premises installed on the roof or other area outside the Premises if Landlord otherwise alters the Building, and (vii) in connection with the
foregoing matters, or with any other inspections, repairs, maintenance, improvements or alterations in or about the Building, or as a result of any casualty, condemnation, event of Force Majeure, Law
or governmental requirement or request, or any other cause, erect scaffolding, barricades, and other structures reasonably required in, or otherwise close, Common Areas or portions thereof, including
but not limited to public entry ways and areas, restrooms, stairways, escalators (if any), elevators and corridors, as long as Tenant's rights under this Lease are not diminished in any way. However,
in connection with exercising such rights, Landlord shall: (a) take reasonable steps to minimize or avoid any denial of access to the Premises, (b) at Landlord's expense, move Tenant's
entrance doorway if access thereto is materially impaired, and (c) if Landlord enters the Premises in connection with any of the foregoing matters, comply with clause (a) above.

26.   HAZARDOUS MATERIALS

Tenant and Landlord shall indemnify and hold the other and their Affiliates harmless from and against any and all claims, costs and liabilities (including
reasonable attorneys' fees) arising out of or in connection with any breach of its covenants under
this Section. The parties' obligations under this Section 26 will survive the expiration or early termination of the Term and are further clarified below:

26.1Tenant shall not transport, use, store, maintain, generate, manufacture, handle, dispose, release or discharge any "Hazardous Material"
(as defined below) upon or about the Building or Land or permit Tenant, Tenant's Affiliates,

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employees,
agents, contractors, invitees and other occupants of the Premises to engage in such activities upon or about the Building.

26.2Tenant shall promptly notify Landlord of: (i) any enforcement, cleanup or other regulatory action taken or threatened by any
governmental or regulatory authority with respect to the presence of any Hazardous Material on the Premises or the migration thereof from or to other property, (ii) any demands or claims made
or threatened by any party relating to any loss or injury resulting from any Hazardous Material on the Premises, (iii) any release, discharge or nonroutine, improper or unlawful disposal or
transportation of any Hazardous Material on or from the Premises or in violation of this Section, and (iv) any matters where Tenant is required by Law to give a notice to any governmental or
regulatory authority respecting any Hazardous Material on the Premises. Landlord shall have the right (but not the obligation) to join and participate, as a party, in any legal proceedings or actions
affecting the Premises initiated in connection with any environmental, health or safety Law. At such times as Landlord may reasonably request, Tenant shall provide Landlord with a written list,
certified to be true and complete, identifying any Hazardous Material then used, stored, or maintained upon the Premises, the use and approximate quantity of each such material, a copy of any material
safety data sheet ("MSDS") issued by the manufacturer therefor, and such other information as Landlord may reasonably require or as may be required by Law. The term "Hazardous Material" for purposes
hereof shall mean any substance which is hazardous to any person, property, animal, or thing, including but not limited to: chemical, substance, material or waste or component thereof which is now or
hereafter listed, defined or regulated as a hazardous or toxic chemical, substance, material or waste or component thereof by any federal, state or local governing or regulatory body having
jurisdiction, or which would trigger any employee or community "right-to-know" requirements adopted by any such body, or for which any such body has adopted any requirements for the preparation or
distribution of an MSDS.

26.3If any Hazardous Material is released, discharged or disposed of by Tenant or any other occupant of the Premises, or their employees,
agents or contractors, on or about the Building, Tenant shall immediately, properly and in compliance with applicable Laws clean up and remove the Hazardous Material from the Building and any other
affected property and clean or replace any affected personal property (whether or not owned by Landlord), at Tenant's expense (without limiting Landlord's other remedies therefor) to levels required
by law for commercial properties. Such clean up and removal work shall be done in compliance with all laws and be subject to Landlord's prior written approval (except in emergencies), and shall
include, without limitation, any testing, investigation, and the preparation and implementation of any remedial action plan required by any court or governmental body having jurisdiction or reasonably
required by Landlord. If Landlord or any Encumbrance holder or governmental body arranges for any tests or studies showing that this Section has been violated by Tenant, Tenant shall pay for the
actual costs of such tests. If any Hazardous Material is released, discharged or disposed of on or about the Building and such release, discharge or disposal is not caused by Tenant or other occupants
of the Premises, or their employees, agents or contractors, such release, discharge or disposal shall be deemed casualty damage under Section 12 to the extent that the Premises are affected
thereby; in such case, Landlord and Tenant shall have the obligations and rights respecting such casualty damage provided under such Section 12.

26.4Landlord represents to Tenant that Landlord has not used, and will not use during the Term of this Lease, the Building to treat, store,
refine, process, or dispose of Hazardous Materials in violation of any applicable laws, and further represents that to the best of its knowledge, there are no releases nor have there ever been any
releases of such Hazardous Materials at, on, or under the Building which would give rise to a cleanup or recommendation obligation under any applicable federal, state, or local environmental law,
regulation, or ordinance under common law. It is understood that the Building contains ACM's. Landlord represents and warrants that Landlord is undergoing an ACM Removal Program and that it will
comply in all material respects with all Laws in connection with the ACM Removal Program and that the Premises will not contain asbestos in any form, including insulation or flooring.

27.   ATTORNEYS' FEES, COUNTERCLAIMS, VENUE AND JURY TRIAL

Each party agrees to pay, upon demand, all of the other party's costs, charges and expenses, including the fees and out-of-pocket expenses of counsel, agents, and
others retained, incurred in successfully enforcing the other party's obligations under this Lease. All obligations under this Section 27 will survive the expiration or early termination of the
Term. Further, if Landlord or any of its officers, directors, trustees, beneficiaries, partners, agents, Affiliates or employees shall be made a party to any litigation commenced by or against Tenant
and are not found to be at fault, Tenant shall pay all costs, expenses and reasonable attorneys' fees incurred by Landlord or any such party in connection with such litigation. Tenant shall also pay
all costs, expenses and reasonable attorneys' fees that may be incurred by Landlord in successfully enforcing this Lease.IN THE INTEREST OF OBTAINING A SPEEDIER AND LESS

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COSTLY HEARING OF ANY DISPUTE, EACH OF LANDLORD AND TENANT HEREBY EXPRESSLY WAIVES TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM BROUGHT BY
EITHER PARTY AGAINST THE OTHER AND ANY RIGHTS TO A TRIAL BY JURY UNDER ANY LAW OR PUBLIC POLICY IN CONNECTION WITH ANY MATTER WHATSOEVER ARISING OUT OF OR IN ANY WAY RELATING TO THIS LEASE, THE
PREMISES OR THE BUILDING. However, such waiver of jury trial will not apply to any claims for personal injury. Although such jury waiver is intended to be self-operative and
irrevocable, Landlord and Tenant each further agree, if requested, to confirm such waivers in writing at the time of commencement of any such action, proceeding or counterclaim. If Landlord commences
any detainer suit, summary pro ceedings or other action seeking possession of the Premises, Tenant agrees not to interpose by consolidation of actions, removal to chancery or otherwise, any
counterclaim, claim for set-off, recoupment or deduction of Rent, or other claim seeking affirmative relief of any kind (except a mandatory or compulsory counterclaim which Tenant would forfeit if not
so interposed). This Lease will be governed by and construed according to the laws of the State of Illinois. Any action or proceeding brought by either party against the other for any matter arising
out of or in any way relating to this Lease, the Premises or the Building, shall be heard in Cook County.

28.   EXPANSION, RIGHT OF FIRST OFFER, CONTRACTION, RENEWAL AND TERMINATION

28.1 Expansion



The
Expansion Space shall be included in the Premises effective as of the Expansion Space Commencement Date on the same terms, covenants and conditions as are contained in this Lease, with the
following exceptions and modifications:

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Following
exercise by Tenant of the Expansion Option, and within thirty (30) days following written request by either Landlord or Tenant, Landlord and Tenant shall enter into a
mutually-acceptable supplement to this Lease confirming the terms, conditions and provisions applicable to the related Expansion Space as determined in accordance herewith.



28.2 Tenant's Right of First Offer

Tenant shall have and is hereby granted the primary right of first offer to add to the Premises demised hereunder all or any portion of any space located on the
tenth (10th) floor of the Building, that become "available for lease" from time to time at
any time after the Commencement Date (such right herein called the "Right of First Offer"). It shall be a condition to Tenant's ability to lease any First Offer Space that as of the commencement of
the lease of such First Offer Space, Tenant leases and occupies the entire eleventh (11th) floor of the Building. Subject to the following sentence, any First Offer Space shall be deemed to be
"available for lease" upon expiration or other termination of any then-current lease of such space. Landlord shall at all times have the right to renew or extend the lease of any occupant of any First
Offer Space without triggering Tenant's rights under this section.

Landlord
shall notify Tenant in writing promptly after Landlord learns of the projected availability of such space no more than fifteen (15) nor less than five (5) months prior to
the projected availability of such space. Such notice (a "First Offer Notice") shall include Landlord's reasonable good faith proposal of the Fair Market Rental Value (as defined in Exhibit Ebelow) for
such First Offer Space, including the proposed Base Rent, Additional Rent and tenant improvement allowance, leasing commission and
other material concessions, if any and the date that such First Offer Space will be available to Tenant. Tenant shall have ten (10) business days from receipt of such notice within which to
notify Landlord in writing of Tenant's acceptance of such offer to add all of such space to the Premises on the terms and conditions set forth in Landlord's notice to Tenant.

If
Tenant does not timely exercise its option to lease any particu lar First Offer Space, Landlord shall have one hundred eighty (180) days thereafter within which to lease such space to
another prospective tenant for a net effective rental rate which is not less than 90% of the net effective rent offered to Tenant in the related First Offer Notice. If Landlord shall not have so
leased said space within said 180-day period (such 180-day period to be extended if Landlord and a third party have fully executed a letter of intent with respect to such space and have executed a
lease within 45 days thereafter) or if Landlord desires to lease said space at a net effective rental rate less than 90% of the rate offered to Tenant, then such space shall again be offered to Tenant
by a new First Offer Notice hereunder.

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If
Tenant has validly exercised its option pursuant to this Section 28.2, then, such First Offer Space which Tenant has elected to lease shall be included in the Premises, subject to all the
agreements, terms and conditions of this Lease, with the following exceptions and modifications:



Following
exercise by Tenant of its option to lease any First Offer Space, and within thirty (30) days following written request by either Landlord or Tenant, Landlord and Tenant shall
enter into a mutually acceptable supplement to this Lease confirming the terms, conditions and provisions applicable to the First Offer Space to leased.

It
shall be a condition to Tenant's right to exercise an option to add First Offer Space under this Section 28.2, that, at the time Tenant notifies Landlord of the exercise of such
option to add such First Offer Space to the Premises, (i) there remains at least twelve (12) months on the Term of this Lease, (ii) Tenant is not in Default after notice and the
expiration of any applicable cure period, and (iii) neither this Lease nor Tenant's right of possession shall have been terminated and this Lease shall then be in full force and effect, and
(iv) the option hereunder may not be exercised by or for the benefit of any assignee or sublessee, unless such assignee or sublessee is an Affiliated Entity or a single entity which leases or
subleases at least ninety percent (90%) of the Premises then demised hereby.

28.3 Tenant's Option To Reduce the Premises

Tenant shall have the option from time to time, but no more often than once each twenty-four (24) months (the "Contraction Option"), to reduce the Premises by an
amount (the "Contraction Space") equal to between 500 and 5,000 rentable square feet as selected and designated by Tenant (provided all Contraction Space shall be contiguous) as of the date of
Tenant's exercise of such Contraction Option, upon the following terms and conditions:



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In
the event Tenant timely and properly exercises the Contraction Option, the Term with respect to the portion of the Premises being contracted shall terminate effective as of the Contraction
Effective Date. Rent for the terminated portion of the Premises shall be paid through and apportioned as of the Contraction Effective Date, and neither Landlord nor Tenant shall have any rights,
estates, liabilities or obligations first accruing under this Lease after the Contraction Effective Date with respect to such contracted area, except such rights and liabilities which, by the terms of
this Lease are rights and obligations of either party which survive the expiration of this Lease.

28.4 Renewal



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28.5 Termination Option

Tenant shall further have the right to terminate this Lease effective on either (i) the last day of the seventy-second (72nd) full calendar month, or
(ii) one hundred twentieth (120th) full calendar month, following the Commencement Date of the Term, so long as:



Tenant's
exercise of the option to terminate this Lease is further subject to the condition that upon the effective date of such option Tenant is not in Default under any of the terms, covenants or
conditions of this Lease. Tenant shall deliver the Premises to Landlord on or before the effective termination date in accordance with the terms and conditions of this Lease the same as if such
termination date were the original expiration date of the Term of this Lease.

29.   DETERMINATION BY ARBITRATION

In the event of the failure of the parties to agree as to Fair Market Rental Rate by the last day of the Negotiation Period, such dispute shall be determined by
arbitration as herein provided. Landlord and Tenant, within fifteen (15) business days after expiration of such Negotiation Period, shall each simultaneously submit to the other, in a sealed envelope,
its good faith estimate of the Fair Market Rental Rate (collectively referred to as the "Estimates"). If the higher of such Estimates is not more than one hundred five percent (105%) of the lower of
such Estimates, then Fair Market Rental Rate shall be the average of the two Estimates. If the Fair Market Rental Rate is not so resolved pursuant to the preceding sentence, Landlord and Tenant,
within fifteen (15) business days after the exchange of Estimates, shall each select an appraiser to determine which of the two Estimates most closely reflects the Fair Market Rental Rate for the
Renewal Period. Each appraiser selected pursuant to this Section 29 shall be a downtown Chicago office broker and shall have at least ten (10) years experience as an office broker working in
the downtown Chicago, Illinois office market, with working knowledge of current rental rates and market practices. Upon selection, Landlord's and Tenant's appraisers shall work together in good faith
to agree upon which of the two Estimates most closely reflects the Fair Market Rental Rate for the Renewal Period. The Estimate chosen by such appraisers shall be binding on both Landlord and Tenant
as the Base Rent rate for the space in question. If either Landlord or Tenant fails to appoint an appraiser within the fifteen (15) business day period referred to above, the appraiser appointed by
the other party shall be the sole appraiser for the purposes hereof. If the two appraisers cannot agree upon which of the two Estimates most closely reflects the Fair Market Rental Rate within twenty
(20) days after their appointment, then, within ten (10) days after the expiration of such twenty (20) day period, the two (2) appraisers shall select a third appraiser meeting the
aforementioned criteria (or, if such two appraisers are unable to select a third appraiser, such selection shall be made by the President of the Chicago chapter of BOMA). Once the third appraiser has
been selected as provided for above, then, as soon thereafter as practicable but in any case within fourteen (14) days, the appraiser shall make his determination of which of the two Estimates most
closely reflects the Fair Market Rental Rate and such appraiser shall not select anything other than one of the two Estimates from Landlord and Tenant and such Estimate shall be binding on both
Landlord and Tenant as the Fair Market Rental Rate for the Renewal Period. If the third appraiser believes that expert advice would materially assist him/her, such appraiser may retain one or more
qualified persons, to provide such expert advice. The party whose Estimate is not selected as the Fair Market Rental Rate shall pay the costs of the third

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appraiser
and of any experts retained by the third appraiser. Any fees of any appraiser, counsel or experts engaged directly by Landlord or Tenant, however, shall be borne by the party retaining such
appraiser, counsel or expert.

30.   PARKING BY TENANT

Landlord shall provide or cause to be provided to Tenant five (5) monthly parking passes. Tenant shall pay to Landlord for the use of such parking passes
the monthly rates charged by Landlord to third parties from time to time (which as of the date of execution of this Lease are $265.00 per space per month, and which rates will be subject to increase
upon delivery of written notice to Tenant by Landlord during the Term of this Lease) for only those monthly parking passes used by Tenant. Except as specifically provided in this Lease, nothing in
this Lease shall be construed as granting to Tenant or its customers, patrons, invitees, visitors or employees a right to park any cars or other vehicles in any parking facilities in or about the
Building, except on such terms and conditions as such parking facility shall be made available to the general public.

31.   ROOF SATELLITE DISH/ANTENNAE

Tenant shall have limited access to and use of the Building's roof and riser space to install up to one (1) communications dish (up to 3.5 feet in diameter)
and related equipment for its own use (and not the use of any subtenants other than an Affiliated Entity, or an assignee or subtenant who leases at least ninety per cent (90%) of the rentable area of
the Premises), serving solely the business conducted by Tenant in the Premises, for the transmission and receipt of radio, microwave and other communication signals. Tenant shall pay the cost to
install, maintain, insure and remove equipment installed on the roof of the
Building by Tenant and shall, at its sole cost and expense, obtain any zoning or other governmental approvals necessary for such equipment, and repair any and all damage caused to the Building or any
equipment or property as a result of Tenant's exercise of the rights granted in this paragraph. Installation of such equipment shall be performed in accordance with the provisions of Section 9.
Landlord shall not unreasonably withhold any consent required under Section 9 to installation of such equipment. Tenant agrees that access to the roof shall be reasonably controlled by Landlord in
accordance with Landlord's riser maintenance plan and rooftop rules and regulations adopted and uniformly enforced for the Building from time to time, and Tenant shall coordinate any activity
on the roof of the Building with prior written notice to and the involvement of Building personnel.

32.   BUILDING RISERS

Tenant at its expense shall have the right to use the Building's risers and riser closets, as applicable, in order to run its telephone, data and satellite
transmission equipment located or to be located in the applicable telephone and/or data equipment closets or other areas of the Building designated for such purposes.

33.   CONDENSER WATER

If requested, Landlord will maintain for Tenant's usage condensor water throughout the Lease term and any renewal periods. Tenant will specify its required
condensor water capacity prior to Landlord's final plan review. Landlord, at its cost and expense, will install a tie in valve and condensor water flow meter in the Premises in a location to be
designated by Tenant. The cost for the condensor water service will be Landlord's actual cost for each ton of usage.

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HAVING
READ and intending to be bound by the terms and provisions of this Lease, Landlord and Tenant have signed it as of the Lease Commencement Date.

|LANDLORD:                                |  | TENANT:                                    
|---------------------------------------- |  | -------------------------------------------
|                                         |  |                                            
|TDC CANADA, INC.,
a Canadian Corporation |  | QUIXOTE CORPORATION,
a Delaware corporation
|BY:                                      |  | /s/ Rudy Bonducci                          
|NAME:                                    |  | /s/ Rudy Bonducci                          
|TITLE:                                   |  | Vice President                             
|WACKER GP, INC.
a Delaware corporation   |  |                                            
|BY:                                      |  | /s/ Rudy Bonducci                          
|NAME:                                    |  | Rudy Bonducci                              
|TITLE:                                   |  | Vice President                             

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TABLE OF CONTENTS

|1.  |  | BASIC LEASE PROVISIONS, EXHIBITS AND DEFINITIONS |  | 1                            
|--- |  | ------------------------------------------------ |  | -----------------------------
|    |  | 1.1                                              |  | Basic Lease Provisions       
|    |  | 1.2                                              |  | Exhibits                     
|    |  | 1.3                                              |  | Definitions                  
|2.  |  | PREMISES, TERM AND COMMENCEMENT DATE             |  | 5                            
|3.  |  | TERM COVENANTS & TERM EXPIRATION                 |  | 5                            
|    |  | 3.1                                              |  | Quiet Enjoyment              
|    |  | 3.2                                              |  | Landlord and Tenant Covenants
|    |  | 3.3                                              |  | Early Occupancy              
|    |  | 3.4                                              |  | Surrender                    
|    |  | 3.5                                              |  | Holding Over                 
|4.  |  | RENT                                             |  | 6                            
|    |  | 4.1                                              |  | Base Rent                    
|    |  | 4.2                                              |  | Additional Rent              
|    |  | 4.3                                              |  | Other Taxes                  
|    |  | 4.4                                              |  | Terms of Payment             
|    |  | 4.5                                              |  | Late Payments                
|    |  | 4.6                                              |  | Right to Accept Payments     
|5.  |  | CONDITION OF PREMISES                            |  | 9                            
|6.  |  | USE AND OCCUPANCY                                |  | 9                            
|    |  | 6.1                                              |  | Use                          
|    |  | 6.2                                              |  | Compliance                   
|    |  | 6.3                                              |  | Occupancy                    
|7.  |  | SERVICES AND UTILITIES                           |  | 10                           
|    |  | 7.1                                              |  | Landlord's Standard Services 
|    |  | 7.2                                              |  | Electricity                  
|    |  | 7.3                                              |  | Additional Services          
|    |  | 7.4                                              |  | Interruption of Services     
|8.  |  | REPAIRS                                          |  | 13                           
|    |  | 8.1                                              |  | Repairs Within the Premises  
|    |  | 8.2                                              |  | Failure to Maintain Premises 
|    |  | 8.3                                              |  | Notice of Damage             
|9.  |  | ALTERATIONS                                      |  | 14                           
|    |  | 9.1                                              |  | Alterations by Tenant        
|    |  | 9.2                                              |  | Alterations by Landlord      
|10. |  | LIENS                                            |  | 15                           
|11. |  | INSURANCE                                        |  | 15                           

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|12. |  | DAMAGE OR DESTRUCTION                    |  | 16                                             
|--- |  | ---------------------------------------- |  | -----------------------------------------------
|    |  | 12.1                                     |  | Termination Options                            
|    |  | 12.2                                     |  | Repair Obligations                             
|    |  | 12.3                                     |  | Rent Abatement                                 
|13. |  | INDEMNITIES                              |  | 17                                             
|    |  | 13.1                                     |  | Tenant's Indemnification                       
|    |  | 13.2                                     |  | Landlord's Indemnification                     
|14. |  | CONDEMNATION                             |  | 18                                             
|    |  | 14.1                                     |  | Full Taking                                    
|    |  | 14.2                                     |  | Partial Taking                                 
|    |  | 14.3                                     |  | Awards                                         
|15. |  | ASSIGNMENT AND SUBLETTING                |  | 18                                             
|    |  | 15.1                                     |  | Limitation                                     
|    |  | 15.2                                     |  | Notice of Proposed Transfer; Landlord's Options
|    |  | 15.3                                     |  | Consent Not to Be Unreasonably Withheld        
|    |  | 15.4                                     |  | Form of Transfer                               
|    |  | 15.5                                     |  | Payments to Landlord                           
|    |  | 15.6                                     |  | Change of Ownership                            
|    |  | 15.7                                     |  | Permitted Transfers                            
|    |  | 15.8                                     |  | Effect of Transfers                            
|16. |  | PERSONAL PROPERTY                        |  | 20                                             
|    |  | 16.1                                     |  | Installation and Removal                       
|    |  | 16.2                                     |  | Responsibility                                 
|17. |  | ESTOPPEL CERTIFICATES                    |  | 21                                             
|18. |  | TRANSFER OF LANDLORD'S INTEREST          |  | 21                                             
|    |  | 18.1                                     |  | Sale, Conveyance and Assignment                
|    |  | 18.2                                     |  | Effect of Sale, Conveyance or Assignment       
|    |  | 18.3                                     |  | Subordination                                  
|    |  | 18.4                                     |  | Attornment                                     
|19. |  | RULES AND REGULATIONS                    |  | 22                                             
|20. |  | TENANT'S DEFAULT AND LANDLORD'S REMEDIES |  | 22                                             
|    |  | 20.1                                     |  | Default                                        
|    |  | 20.2                                     |  | Remedies                                       
|    |  | 20.3                                     |  | Mitigation of Damages                          
|    |  | 20.4                                     |  | Reletting                                      
|    |  | 20.5                                     |  | Other Matters                                  
|    |  | 20.6                                     |  | Bankruptcy Relief                              

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|21. |  | INTENTIONALLY OMITTED                                                 |  | 24                                    
|--- |  | --------------------------------------------------------------------- |  | --------------------------------------
|22. |  | BROKERS                                                               |  | 24                                    
|23. |  | LIMITATIONS ON LANDLORD'S LIABILITY                                   |  | 25                                    
|24. |  | NOTICES                                                               |  | 25                                    
|25. |  | MISCELLANEOUS                                                         |  | 25                                    
|    |  | 25.1                                                                  |  | Severability                          
|    |  | 25.2                                                                  |  | Binding Effect                        
|    |  | 25.3                                                                  |  | Complete Agreement; Modification      
|    |  | 25.4                                                                  |  | Delivery for Examination              
|    |  | 25.5                                                                  |  | No Air Rights                         
|    |  | 25.6                                                                  |  | Intentionally omitted                 
|    |  | 25.7                                                                  |  | Building Name                         
|    |  | 25.8                                                                  |  | Building Standard                     
|    |  | 25.9                                                                  |  | No Waiver                             
|    |  | 25.10                                                                 |  | Recording; Confidentiality            
|    |  | 25.11                                                                 |  | Captions                              
|    |  | 25.12                                                                 |  | Invoices                              
|    |  | 25.13                                                                 |  | Intentionally omitted                 
|    |  | 25.14                                                                 |  | Authority to Bind                     
|    |  | 25.15                                                                 |  | Only Landlord/Tenant Relationship     
|    |  | 25.16                                                                 |  | Covenants Independent                 
|    |  | 25.17                                                                 |  | Landlord's Rights                     
|26. |  | HAZARDOUS MATERIALS                                                   |  | 27                                    
|27. |  | ATTORNEYS' FEES, COUNTERCLAIMS, VENUE AND JURY TRIAL                  |  | 28                                    
|28. |  | EXPANSION, RIGHT OF FIRST OFFER, CONTRACTION, RENEWAL AND TERMINATION |  | 29                                    
|    |  | 28.1                                                                  |  | Expansion                             
|    |  | 28.2                                                                  |  | Tenant's Right of First Offer         
|    |  | 28.3                                                                  |  | Tenant's Option To Reduce the Premises
|    |  | 28.4                                                                  |  | Renewal                               
|    |  | 28.5                                                                  |  | Termination Option                    
|29. |  | DETERMINATION BY ARBITRATION                                          |  | 33                                    
|30. |  | PARKING BY TENANT                                                     |  | 33                                    
|31. |  | ROOF SATELLITE DISH/ANTENNAE                                          |  | 34                                    
|32. |  | BUILDING RISERS                                                       |  | 34                                    
|33. |  | CONDENSER WATER                                                       |  | 34                                    

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