Document:

Office Lease Agreement

 Exhibit 10.31 
 FIRST AMENDMENT TO LEASE 
 THIS FIRST AMENDMENT TO LEASE
(“First Amendment”) entered into as of March 9, 2012 (the “First Amendment Effective Date”), by and between PPF PARAMOUNT ONE MARKET PLAZA OWNER, L.P., a Delaware limited partnership
(“Landlord”) and RPX CORPORATION, a Delaware corporation (“Tenant”) with reference to the following facts: 
  

	A.	Landlord and Tenant are parties to that certain lease dated July 28, 2010, pursuant to which Landlord leases to Tenant space (the “Current
Premises”) currently containing 16,594 rentable square feet described as Suite No. 1300 on the thirteenth (13th) floor of the Spear Tower in the building commonly known as One Market, located at One Market Street, San Francisco,
California (the “Building”). 

  

	B.	Pursuant to the terms of that certain 7th Floor Sub-Sublease dated as of September 29, 2009 by and between Sedgwick LLP (“Sedgwick”), as
Sub-Sublandlord and Tenant, as Sub-Subtenant (the “700 Sublease”), Subtenant currently sub-subleases from Sedgwick a portion of the seventh (7th) floor of the Steuart Tower in the Building (the “Steuart Tower”
and such space, “Suite 700”). 

  

	C.	Pursuant to the terms of that certain Sublease dated as of July 11, 2011 by and between Sedgwick, as Sublandlord and Tenant, as Subtenant (the “800/1100
Sublease”; the 700 Sublease and the 800/1100 Sublease are collectively referred to herein as the “Subleases”), Subtenant currently subleases from Sedgwick the entire eighth (8th) and eleventh (11th) floors of the
Steuart Tower, known as Suite 800 and Suite 1100, respectively. 

  

	D.	The Subleases are scheduled to expire as of April 30, 2013, which is the scheduled date of expiration of Sedgwick’s lease of Suites 700, 800 and 1100.

  

	E.	Landlord and Tenant wish to expand the Premises effective as of May 1, 2013 (the “Expansion Date”), by adding: 

i. Suite 700, consisting of 14,265 rentable square feet; 
 ii. Suite 800, containing 17,598 rentable square feet; 
 iii. Suites 1000, 1003,
1010, 1030, 1050 and 1099 (collectively, the “10th Floor Space”) containing 17,598 rentable square feet in the aggregate; and 
 iv. Suite 1100, consisting of 17,598 rentable square feet; 
 all as described in
Exhibits A-1 through A-4, respectively, attached hereto (Suites 700 and 800, the 10th Floor Space and Suite 1100 collectively containing 67,059 rentable square feet of space, being referred to herein as the “Expansion
Space”). 
  

	F.	Landlord and Tenant further wish to ultimately terminate the Lease with respect to the Current Premises. 

	G.	The Lease by its terms shall expire on April 30, 2013 (the “Current Termination Date”), and the parties desire to extend the Term of the Lease,
all on the following terms and conditions. 

 NOW, THEREFORE, in consideration of the above recitals which
by this reference are incorporated herein, the mutual covenants and conditions contained herein and other valuable consideration, the receipt and sufficiency of which are hereby acknowledged, Landlord and Tenant agree as follows: 

1. Reconfiguration. 
 (a) Expansion. Effective as of the Expansion Date, the Premises, as defined in the Lease, is increased by the addition of the Expansion Space. The term for the Expansion Space shall commence on the
Expansion Date and end on the Extended Termination Date (as hereinafter defined). The Expansion Space is subject to all the terms and conditions of the Lease, except as expressly modified herein. 

(b) Reduction. Effective as of a date (the “Reduction Date”) to be specified by Tenant in a notice delivered to
Landlord at least thirty (30) days in advance (provided that the Reduction Date can be no earlier than April 1, 2013 and no later than September 1, 2013), the Premises, as expanded pursuant to Section 1(a) above, will be reduced
by the removal therefrom of the Current Premises. Tenant shall vacate the Current Premises in accordance with the terms of the Lease on or prior to the Reduction Date and shall fully comply with all obligations under the Lease respecting the Current
Premises up to the Reduction Date, including, without limitation, those provisions relating to the condition of the Current Premises and the removal of Tenant’s property from the Current Premises. Effective as of the Reduction Date, the Current
Premises shall be deemed surrendered by Tenant to Landlord, the Lease shall be terminated with respect to the Current Premises. In the event that Tenant remains in the Current Premises following the Reduction Date, the provisions of Section 36
of the Lease will apply. 
 (c) Premises Re-Defined. From and after the Reduction Date, the Premises will consist only of
the Expansion Space. 
 2. Delivery of Expansion Space. As of the First Amendment Effective
Date, Tenant is in occupancy of Suites 700, 800 and 1100 pursuant to the Subleases. Landlord will deliver possession of the 10th Floor Space to Tenant as of the Expansion Date. If and to the extent that Landlord fails to deliver possession of the
10th Floor Space (or any portion thereof) as of the Expansion Date for any reason, including, but not limited to, any holding over by the current occupant of any portion of the 10th Floor Space, any such delay shall not subject Landlord to any
liability for any loss or damage resulting therefrom. If and to the extent that Landlord fails to deliver the
10th Floor Space in full to Tenant by the Expansion Date,
then the 10th Floor Rent Commencement Date will be delayed on a day for day basis for each day of delay in delivery of the 10th Floor Space beyond the Expansion Date. 
 3. Extension. The Term of the Lease is hereby extended for a period of seventy eight (78) months and shall expire on October 31, 2019 (the “Extended Expiration
Date”), unless sooner terminated in accordance with the terms of the Lease. That portion of the Term of 

  
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the Lease commencing the day immediately following the Current Termination Date (the “Extension Date”) and ending on the Extended Expiration Date shall be referred to herein as
the “Extended Term”, and unless the context clearly provides otherwise, from and after the Extension Date, references in the Lease to the “Term” shall be deemed to include the Extended Term, and references in the Lease to
the “Expiration Date” shall mean the Extended Expiration Date. 
 4. Base Rent. 

(a) Generally. During the Extended Term: 
 (i) Expansion Space. Tenant will pay as Base Rent for the Expansion Space the following: 
 (1) Suites 700 and 800 (31,863 rentable square feet): 
  

									
	 Period
	  	Annual Rate Per
Rentable Square Foot	 	  	Monthly
Base Rent	 
	 May 1, 2013 - April 30, 2014
	  	$	58.00	  	  	$	154,004.50	  
	 May 1, 2014 - April 30, 2015
	  	$	59.00	  	  	$	156,659.75	  
	 May 1, 2015 - April 30, 2016
	  	$	60.00	  	  	$	159,315.00	  
	 May 1, 2016 - April 30, 2017
	  	$	61.00	  	  	$	161,970.25	  
	 May 1, 2017 - April 30, 2018
	  	$	62.00	  	  	$	164,625.50	  
	 May 1, 2018 - April 30, 2019
	  	$	63.00	  	  	$	167,280.75	  
	 May 1, 2019 - October 31, 2019
	  	$	64.00	  	  	$	169,936.00	  

 (2) Suite 1100 (17,598 rentable square feet): 

 

									
	 Period
	  	Annual Rate Per
Rentable Square Foot	 	  	Monthly
Base Rent	 
	 May 1, 2013 - April 30, 2014
	  	$	60.00	  	  	$	87,990.00	  
	 May 1, 2014 - April 30, 2015
	  	$	61.00	  	  	$	89,456.50	  
	 May 1, 2015 - April 30, 2016
	  	$	62.00	  	  	$	90,923.00	  
	 May 1, 2016 - April 30, 2017
	  	$	63.00	  	  	$	92,389.50	  
	 May 1, 2017 - April 30, 2018
	  	$	64.00	  	  	$	93,856.00	  
	 May 1, 2018 - April 30, 2019
	  	$	65.00	  	  	$	95,322.50	  
	 May 1, 2019 - October 31, 2019
	  	$	66.00	  	  	$	96,789.00	  

  
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 (3) 10th Floor Space (17,598 rentable square feet): 

 

									
	 Period
	  	Annual Rate Per
Rentable Square Foot	 	  	Monthly
Base Rent	 
	 September 1, 2013* - April 30, 2014
	  	$	60.00	  	  	$	87,990.00	  
	 May 1, 2014 - April 30, 2015
	  	$	61.00	  	  	$	89,456.50	  
	 May 1, 2015 - April 30, 2016
	  	$	62.00	  	  	$	90,923.00	  
	 May 1, 2016 - April 30, 2017
	  	$	63.00	  	  	$	92,389.50	  
	 May 1, 2017 - April 30, 2018
	  	$	64.00	  	  	$	93,856.00	  
	 May 1, 2018 - April 30, 2019
	  	$	65.00	  	  	$	95,322.50	  
	 May 1, 2019 - October 31, 2019
	  	$	66.00	  	  	$	96,789.00	  

  

	*	The “10th Floor Rent Commencement Date”. 

 (4) Abatement (Suites 700, 800 and 1100). Notwithstanding the foregoing provisions of Section 4(a)(i) to the contrary, so long as Tenant is not in Default, Tenant shall be entitled to an abatement of
Base Rent payable for Suites 700, 800 and 1100 only, for the full calendar months of May and June, 2013 (the “Abatement Period”). The total amount of Base Rent abated during the Abatement Period is referred to herein as the
“Abated Rent”. If Tenant is in Default at any time during the Extended Term, (A) at Landlord’s option, all then-unamortized portions of the Abated Rent (assuming amortization of Abated Rent on a straight-line basis over
the Extended Term) previously credited to Tenant shall become due and payable to Landlord; and (B) if the Default occurs prior to the expiration of the Abatement Period, then, from and after the occurrence of such Default, there shall be no
further abatement of Monthly Rent pursuant to this Section 4(a)(4). 
 (ii) Current Premises. From and after the
Current Termination Date through the Reduction Date, if applicable, Tenant will pay Base Rent for the Current Premises the sum of $53.00 per rentable square foot per annum (i.e., $73,290.17 per month). 

5. Operating Expenses, Taxes and Insurance Expenses. During the Extended Term: 

(a) Tenant’s Share. 
 (i) Expansion Space. Tenant’s Share applicable to the Expansion Space shall be 4.18% (i.e., 67,059/1,605,263); and 
 (ii) Current Premises. For any period between the Current Termination Date and the Reduction Date, Tenant’s Share applicable to the Current Premises shall remain 1.03%. 

(b) Base Year. 
 (i) Expansion Space. The Base Year for Operating Expenses, Taxes and Insurance Expenses applicable to the Expansion Space will be the calendar year 2013; and 

  
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 (ii) Current Premises. For any period from and after the Current Termination Date
through the Reduction Date, the Base Year for Operating Expenses, Taxes and Insurance Expenses applicable to the Current Premises shall remain the calendar year 2010. 
 (c) Proposition 8. Tenant will be entitled to “Proposition 8 protection” as described in Section 7(c) of the Lease. 

6. Letter of Credit. 
 (a) Generally. Pursuant to the Lease, Tenant originally delivered to Landlord a Letter of Credit in the face amount of $219,670.51. The face amount of the Letter of Credit has been reduced to
$146,580.34 pursuant to Section 10(f) of the Lease. Concurrently with Tenant’s execution and delivery of this First Amendment, Tenant will deliver to Landlord a new Letter of Credit (or an amendment to the existing Letter of Credit) in the
face amount (or, in the case of an amendment, amending the face amount of the existing Letter of Credit) to be $1,817,570.00. If the foregoing is accomplished by Tenant’s delivery of a new Letter of Credit, then upon such delivery, Landlord
will return to Tenant the Letter of Credit currently being held by Landlord. 
 (b) Reductions. Notwithstanding the
provisions of Section 6(a) above to the contrary, if, as of April 30, 2014 (and each successive anniversary of such date during the Extended Term [each, a “Reduction Date”]), Reduction Conditions (defined below) are
applicable, then, upon written notice by Tenant (and provided further that the Reduction Conditions additionally apply as of the date of delivery of such notice), the Letter of Credit amount may be reduced (by an amendment to the Letter of Credit)
by an amount equal to $363,514.00; provided, however, that in no event will the Letter of Credit amount ever be reduced below $727,028.00. As used herein, the “Reduction Conditions” shall mean (i) Tenant is not in Default under
Section 30(b) of the Lease (“Monetary Default”) the Lease, (ii) Tenant has not been in Monetary Default during the immediately preceding twelve (12) month period and (iii) no event which, with notice, the passage
of time, or both, would constitute a Default then exists. 
 7. Improvements to Expansion Space. 

(a) Condition of Expansion Space. Tenant is in occupancy of Suites 700, 800 and 1100, and has inspected the 10th Floor Space and
agrees to accept all of the Expansion Space as of the Expansion Date in its “as is” condition, without any agreements, representations, understandings or obligations on the part of Landlord to (i) perform any alterations, additions,
repairs or improvements, (ii) fund or otherwise pay for any alterations, additions, repairs or improvements to the Expansion Space, or (iii) grant Tenant any free rent, concessions, credits or contributions of money with respect to the
Expansion Space, except as may be expressly provided otherwise in this First Amendment. However, Landlord agrees that as of the Expansion Date, (x) there will be no outstanding construction-related lien claims with respect to the Expansion
Space which are attributable to Landlord’s acts or omissions and which would prevent Tenant from commencing construction of the Tenant Improvements (as defined in the Work Agreement attached hereto as Exhibit B (the “Work
Agreement”)) therein and (y) the Expansion Space will be provided with electrical power as described in Section 15(a)(v) of the Lease. 

  
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 (b) Responsibility for Improvements to Expansion Space. Tenant shall construct
improvements within the Expansion Space, and shall be entitled to an Allowance, in accordance with, and subject to the terms of, the Work Agreement attached hereto as Exhibit B. 

8. Compliance with Law. Tenant’s obligations as set forth in Section 12(a) of the Lease will apply to the
Expansion Space, including without limitation, all restrooms located on full floors included within the Expansion Space (i.e., as of the Expansion Date, the eighth (8th), tenth (10th) and eleventh (11th) floors of the Steuart Tower).

 9. Right of First Offer. Section 53(a) of the Lease is deleted, null and void and of no further force or
effect and is replaced with the following: 
 (a) Generally. Subject to the rights of Building tenants existing as of the
First Amendment Effective Date, described in Exhibit C attached hereto (“Superior Rights”). Tenant shall have the right of first offer with respect to space located on the twelfth (12th) floor of the Steuart Tower (the
“Offering Space”) when any portion of the Offering Space becomes Available for Lease (described below). Offering Space shall be deemed to be “Available for Lease” when Landlord has determined that the current
occupant of the applicable Offering Space will not extend or renew the term of its lease for the Offering Space and no occupant has a Superior Right which is subject to exercise. After Landlord has determined that the Offering Space is Available for
Lease, Landlord shall advise Tenant (the “Advice”) of the terms (inclusive of the Base Rent rate [as the same may be escalated over the proposed term], which will be consistent with other recent comparable transactions entered into
within the Building) under which Landlord is prepared to lease such portion of the Offering Space to Tenant for a term equal to the greater of (x) the remainder of the then-current Term and the Extended Term and (y) two (2) years.
Except in the case of unexpected Availability due to the default by an existing occupant of Offering Space under its lease for such space, Landlord shall not deliver a First Offer Notice to Tenant less than four (4) months prior to the
anticipated date of Availability of the applicable Offering Space. Tenant may lease the Offering Space in its entirety only, under such terms, by delivering written notice of exercise to Landlord (“Notice of Exercise”) within ten
(10) Business Days after the date of delivery of the Advice, except that Tenant shall have no such Right of First Offer and Landlord need not provide Tenant with an Advice, if: 

(i) Tenant is in Default at the time Landlord would otherwise deliver the Advice; or 

(ii) More than twenty five percent (25%) of the rentable area of the Premises is sublet (other than pursuant to a Permitted
Transfer) at the time Landlord would otherwise deliver the Advice; or 
 (iii) Tenant’s interest in the Lease has been
assigned (other than pursuant to a Permitted Transfer) prior to the date Landlord would otherwise deliver the Advice; or 

(iv) Tenant is not occupying at least seventy five percent (75%) of the rentable area of the Premises on the date Landlord would
otherwise deliver the Advice. 

  
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 (b) Terms. The term for the Offering Space shall commence upon the commencement date
stated in the Advice and such Offering Space shall be considered a part of the Premises, and the Base Year for the Offering Space will be the calendar year in which said term so commences, provided that all of the terms stated in the Advice shall
govern Tenant’s leasing of the Offering Space and only to the extent that they do not conflict with the Advice, the terms and conditions of the Lease shall apply to the Offering Space. 

(c) Limitation on Right of First Offer. The rights of Tenant hereunder with respect to any portion of the Offering Space shall
terminate on the earlier to occur of: (i) with respect to any portion of the Offering Space that is the subject of an Advice, Tenant’s failure to exercise its Right of First Offer within the ten (10) day period provided in
Section 9(a) above, and (ii) with respect to any portion of the Offering Space which would otherwise have been the subject of an Advice, the date Landlord would have provided Tenant an Advice if Tenant had not been in violation of one or
more of the conditions set forth in clauses (i) through (iv) of Section 9(a) above. Notwithstanding the foregoing, Tenant failed to deliver a Notice of Exercise with respect to Offering Space which is the subject of an Advice, Tenant
shall once again have the Right of First Offer with respect to the Offering Space if Landlord subsequently proposes to lease such Offering Space to a prospective tenant on terms that are substantially different than those set forth in the Advice.
For purposes hereof, the terms offered to a prospect shall be deemed to be substantially the same as those set forth in the Advice as long as there is no more than a ten percent (10%) reduction in the “bottom line” cost per rentable
square foot of the Offering Space to the prospect when compared with the “bottom line” cost per rentable square foot under the Advice, considering all of the economic terms of the both deals, respectively, including, without limitation,
the length of term, the net rent, any tax or expense escalation or other financial escalation and any financial concessions. 

(d) Offering Amendment. If Tenant exercises the Right of First Offer, Landlord shall prepare an amendment (the “Offering
Amendment”) adding the Offering Space to the Premises on the terms set forth in the Advice and reflecting the changes in the Base Rent, rentable area of the Premises, Tenant’s Share and other appropriate terms. A copy of the Offering
Amendment shall be (i) sent to Tenant within a reasonable time after receipt of the Notice of Exercise executed by Tenant, and (ii) executed by Tenant and returned to Landlord within fifteen (15) business days thereafter, but an
otherwise valid exercise of the Right of First Offer shall be fully effective whether or not the Offering Amendment is signed. 

10. Renewal Option. Section 53(b) of the Lease is deleted, null and void and of no further force or effect and is
replaced with the following: 
 (a) Renewal Option. 

(i) Grant of Option; Conditions. Tenant shall have the right (the “Renewal Option”) to further extend the Term
of the Lease for the entire Premises for one (1) additional period of five (5) years commencing on the day following the Extended Expiration Date and ending on the fifth (5th) anniversary of the Termination Date (the “Renewal
Term”). Tenant may exercise the Renewal Option if: 

  
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 (1) Landlord receives Tenant’s irrevocable notice of exercise (“Initial
Renewal Notice”) not earlier than July 31, 2018 and not later than October 31, 2018; and 
 (2) Tenant is
not in Default hereunder at the time that Tenant delivers its Initial Renewal Notice or as of the Extended Expiration Date; and 
 (3) No more than twenty five percent (25%) of the rentable area of the Premises is sublet (other than pursuant to a Permitted Transfer) at the time that Tenant delivers its Initial Renewal Notice or
as of the Extended Expiration Date; and 
 (4) Tenant’s interest in this Lease has not been assigned (other than pursuant
to a Permitted Transfer) prior to the date that Tenant delivers its Initial Renewal Notice or as of the Extended Expiration Date. 
 (ii) Terms Applicable to the Renewal Premises During Renewal Term. The initial Base Rent rate per rentable square foot of the Premises during the Renewal Term shall equal the Prevailing Market
(hereinafter defined) rate per rentable square foot for the Premises. Base Rent during the Renewal Term shall increase, if at all, in accordance with the increases assumed in the determination of Prevailing Market rate. Tenant shall pay Expenses,
Taxes and Insurance Expenses for the Premises during the Renewal Term in accordance with the terms of this Lease. 
 (iii)
Initial Procedure for Determining Prevailing Market. After receipt of Tenant’s Initial Renewal Notice, Landlord shall advise Tenant of the applicable Base Rent rate for the Premises for the Renewal Term. Within fifteen (15) business
days after the date on which Landlord advises Tenant of the applicable Base Rent rate for the Renewal Term, Tenant shall either (i) give Landlord final binding written notice (“Binding Notice”) of Tenant’s agreement with
Landlord’s determination of the Prevailing Market rate for the Renewal Term, or (ii) if Tenant disagrees with Landlord’s determination, provide Landlord with written notice of rejection (the “Rejection Notice”). If
Tenant fails to provide Landlord with either a Binding Notice or Rejection Notice within such fifteen (15) business day period, Tenant will be deemed to have delivered a Rejection Notice. If Tenant provides Landlord with a Binding Notice,
Landlord and Tenant shall enter into the Renewal Amendment (as defined below) upon the terms and conditions set forth herein. If Tenant provides (or is deemed to provide) Landlord with a Rejection Notice, Landlord and Tenant shall work together in
good faith to agree upon the Prevailing Market rate for the Premises during the Renewal Term. Upon agreement, Landlord and Tenant shall enter into the Renewal Amendment in accordance with the terms and conditions hereof. Notwithstanding the
foregoing, if Landlord and Tenant fail to agree upon the Prevailing Market rate within thirty (30) days after the date Tenant provides Landlord with a Rejection Notice (the “Negotiation Period”), the Prevailing Market rate will
be determined in accordance with the arbitration procedures described below. 
 (iv) Arbitration Procedure. 

(1) Landlord and Tenant, within five (5) days after the date of expiration of the Negotiation Period, shall each simultaneously
submit to the other, in a sealed 

  
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envelope, its good faith estimate of the Prevailing Market rate for the Premises during the Renewal Term (collectively referred to as the “Estimates”). If the higher of such
Estimates is not more than 105% of the lower of such Estimates, then Prevailing Market rate shall be the average of the two Estimates. If the Prevailing Market rate is not resolved by the exchange of Estimates, then, within fourteen (14) days
after the exchange of Estimates, Landlord and Tenant shall each select a real estate broker to determine which of the two Estimates most closely reflects the Prevailing Market rate for the Premises during the Renewal Term. Each such real estate
broker so selected shall have had at least the immediately preceding ten (10) years’ experience as a real estate broker leasing first-class office space in the San Francisco financial district, with working knowledge of current rental
rates and practices. 
 (2) Upon selection, Landlord’s and Tenant’s brokers shall work together in good faith to
agree upon which of the two Estimates most closely reflects the Prevailing Market rate for the Premises. The Estimate chosen by the brokers shall be binding on both Landlord and Tenant. If either Landlord or Tenant fails to appoint a broker within
the fourteen (14) day period referred to above, the broker appointed by the other party shall be the sole broker for the purposes hereof. If the two brokers cannot agree upon which of the two Estimates most closely reflects the Prevailing
Market within twenty (20) days after their appointment, then, within fourteen (14) days after the expiration of such twenty (20) day period, the two brokers shall select a third broker meeting the aforementioned criteria. Once the
third broker (the “Arbitrator”) has been selected as provided for above, then, as soon thereafter as practicable but in any case within fourteen (14) days, the Arbitrator shall make his or her determination of which of the two
Estimates most closely reflects the Prevailing Market rate and such Estimate shall be binding on both Landlord and Tenant. The parties shall share equally in the costs of the Arbitrator. 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. 
 (3) If the
Prevailing Market rate has not been determined by the commencement date of the Renewal Term, Tenant shall pay Base Rent upon the terms and conditions (i.e., Base Year and rate per rentable square foot) in effect during the last month of the Extended
Term for the Premises until such time as the Prevailing Market rate has been determined. Upon such determination, the Base Rent for the Premises shall be retroactively adjusted to the commencement of the Renewal Term. If such adjustment results in
an underpayment of Base Rent by Tenant, Tenant shall pay Landlord the amount of such underpayment within thirty (30) days after the determination thereof. If such adjustment results in an overpayment of Base Rent by Tenant, Landlord shall
credit such overpayment against the next installment of Base Rent due under the Lease and, to the extent necessary, any subsequent installments, until the entire amount of such overpayment has been credited against Base Rent. 

(v) Renewal Amendment. If Tenant is entitled to and properly exercises the Renewal Option, Landlord shall prepare an amendment
(the “Renewal Amendment”) to reflect changes in the Base Rent, Base Year, term, termination date and other appropriate terms. Tenant shall execute and return the Renewal Amendment to Landlord within fifteen (15) Business Days
after Tenant’s receipt of same, but an otherwise valid exercise of the Renewal Option shall be fully effective whether or not the Renewal Amendment is executed. 

  
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 (vi) Prevailing Market. For purposes hereof, “Prevailing Market”
shall mean the arms’ length fair market annual rental rate per rentable square foot under new and renewal leases and amendments with terms commencing on or about the date on which the Prevailing Market is being determined hereunder (but
excluding any renewal leases or amendments in which the rental components were (x) established by a pre-agreed mathematical formula (for example, a CPI escalator), or (y) limited by a pre-agreed “floor” or “cap”), for
tenants of comparable credit worthiness to the Tenant, for space comparable to the Renewal Premises in the Building and Class A office buildings comparable to the Building, in the San Francisco, California Financial District. The determination
of Prevailing Market shall take into account any material economic differences between the terms of this Lease and any comparison lease or amendment, such as rent abatements, construction costs and other concessions and the manner, if any, in which
the landlord under any such lease is reimbursed for operating expenses and taxes, as well as the level of improvements existing in the Premises and the views available from the Premises. 

11. Parking. From and after the Expansion Date, Tenant will have the right to license from Landlord seven (7) Spaces
in the on-site garage serving the Building (the “On-Site Spaces”) and twenty two (22) Spaces in the Off-Site Garage. As of the First Amendment Effective Date, the monthly rates for On-Site Spaces are $495.00 for unreserved On-Site
Spaces and $600.00 for reserved On-Site Spaces, and the monthly rates for Off-Site Spaces are $375.00 for unreserved Off-Site Spaces and $465.00 for reserved Off-Site Spaces. 
 12. Alterations. Tenant expressly acknowledges that, pursuant to the provisions of Section 22 of the Lease, except with respect to minor Alterations described in the first
(1st) sentence of Section 22(a), all work performed by or on behalf of Tenant in the Premises requires the prior written approval of Landlord, without exception, and that should Tenant perform any work of Alterations in the Premises in
violation of the provisions of Section 22 of the Lease, Landlord, at Landlord’s sole discretion, may require Tenant to remove such Alterations and/or reimburse Landlord for all costs (including imputed internal costs associated with time
spent by Building management employees reviewing and evaluating the work performed by Tenant) with respect to such unauthorized Alterations, plus a penalty in the amount of $5,000.00. 

13. Mortgagee’s Rights. Landlord agrees to use reasonable efforts (as described in Section 38(e) of the Lease),
to obtain a subordination, non-disturbance and attornment agreement from Landlord’s current Lender. 
 14. Riser
Space. Subject to Landlord’s approval and to Tenant’s compliance with Landlord’s guidelines for the installation and maintenance of any Cable (including, without limitation, Tenant’s use of any contractor specified by
Landlord), Tenant, at no additional cost to Tenant for occupying such spaces, shall have the right to a commercially reasonable amount of non-exclusive space in the Building’s risers, ducts, shafts and conduits for Tenant’s
telecommunications cable from the point of entry of such telecommunications service into the Building to the Premises. Tenant’s rights hereunder may not be transferred to or used by any other entity in the business of providing satellite,
voice, data or other telecommunications services to third parties, except to the extent such entity will use the rights hereunder only to service its own satellite, voice, data and other telecommunications requirements at the Premises. 

  
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 15. Miscellaneous. 

(a) This First Amendment and the attached exhibits, which are hereby incorporated into and made a part of this First Amendment, set forth
the entire agreement between the parties with respect to the matters set forth herein. There have been no additional oral or written representations or agreements. 
 (b) Except as herein modified or amended, the provisions, conditions and terms of the Lease shall remain unchanged and in full force and effect. 

(c) In the case of any inconsistency between the provisions of the Lease and this First Amendment, the provisions of this First Amendment
shall govern and control. 
 (d) Submission of this First Amendment by Landlord is not an offer to enter into this First
Amendment but rather is a solicitation for such an offer by Tenant. Landlord shall not be bound by this First Amendment until Landlord has executed and delivered the same to Tenant. 

(e) Capitalized terms used in this First Amendment shall have the same definitions as set forth in the Lease to the extent that such
capitalized terms are defined therein and not redefined in this First Amendment. 
 (f) Tenant hereby represents to Landlord
that Tenant has dealt with no broker in connection with this First Amendment, other than CB Richard Ellis (“Tenant’s Broker”). Tenant agrees to defend, indemnify and hold Landlord harmless from all claims of any brokers, other
than Tenant’s Broker, claiming to have represented Tenant in connection with this First Amendment. Landlord hereby represents to Tenant that Landlord has dealt with no broker in connection with this First Amendment, other than Jones Lang
LaSalle Americas, Inc. (“Landlord’s Broker”). Landlord agrees to defend, indemnify and hold Tenant harmless from all claims of any brokers, other than Landlord’s Broker, claiming to have represented Landlord in connection
with this First Amendment. 
 (g) Each signatory of this First Amendment represents hereby that he or she has the authority to
execute and deliver the same on behalf of the party hereto for which such signatory is acting. 
 (h) Tenant represents and
warrants to Landlord that Tenant is currently in compliance with and shall at all times through and including the Current Termination Date, and during the Extended Term (including any extension thereof), remain in compliance with the regulations of
the Office of Foreign Asset Control (“OFAC”) of the Department of the Treasury and any statute, executive order (including the September 24, 2001, Executive Order Blocking Property and Prohibiting Transactions with Persons Who
Commit, Threaten to Commit, or Support Terrorism), or other governmental action relating thereto. 
 (i) This First Amendment
may be executed in multiple counterparts each of which is deemed an original but together constitute one and the same instrument. This First Amendment may be executed in so-called “pdf” format and each party has the right to rely upon

  
 11 

 
a pdf counterpart of this First Amendment signed by the other party to the same extent as if such party had received an original counterpart. 

[SIGNATURES ARE ON FOLLOWING PAGE] 

  
 12 

 IN WITNESS WHEREOF, Landlord and Tenant have duly executed this First Amendment as of
the First Amendment Effective Date. 
 LANDLORD: 
 PPF PARAMOUNT ONE MARKET PLAZA OWNER, L.P., 
 a Delaware limited partnership

  

					
	        By:	 	PPF PARAMOUNT GP, LLC
			
		 	By:	 	 /s/ Jolanta K. Bott

		 	Name:	 	Jolanta K. Bott
		 	Title:	 	Vice President

  

			
	TENANT:
	
	 RPX CORPORATION,
 a Delaware corporation

		
	By:	 	 /s/ John A. Amster

	Print Name:	 	 John A. Amster

	Its:	 	 Chief Executive Officer

  
 13 

 EXHIBIT A-1 
 SUITE 700 
  
 

 

 EXHIBIT A-2 
 SUITE 800 
  
 

 

 EXHIBIT A-3 
 10TH FLOOR SPACE 
  
 

 

 EXHIBIT A-4 
 SUITE 1100 
  
 

 

 EXHIBIT B 
 WORK AGREEMENT 
 THIS WORK AGREEMENT (“Work Agreement”) is
attached to and made a part of that certain First Amendment to Lease (the “First Amendment”) between PPF PARAMOUNT ONE MARKET PLAZA OWNER L.P., a Delaware limited partnership (“Landlord”) and RPX
CORPORATION, a Delaware corporation (“Tenant”), pursuant to which Tenant has agreed to lease space containing approximately 67,059 rentable square feet (the “Expansion Space”) on the seventh (7th), eighth (8th),
tenth (10th) and eleventh (11th) floors of the Steuart Tower in the building commonly known as One Market Plaza, located at One Market Street, San Francisco, California (the “Building”). All capitalized terms used but not
defined herein shall have the respective meanings given such terms in the First Amendment or the Lease (as defined in the First Amendment). 
 SECTION 1 
 CONSTRUCTION DRAWINGS 

1.1 Selection of Architect/Construction Drawings. Tenant shall retain Studio TMT as the architect/space planner (the
“Architect”) to prepare a space plan (the “Space Plan”). Tenant shall retain the engineering consultants designated by Landlord (the “Engineers”) to prepare all plans and engineering working
drawings and to perform all work relating to the structural, mechanical, electrical, plumbing, HVAC, life-safety, and sprinkler components of the Tenant Improvements. The Space Plan and drawings to be prepared by Architect and the Engineers
hereunder shall be known collectively as the “Construction Drawings.” All Construction Drawings shall comply with the drawing format and specifications determined by Landlord, and shall be subject to Landlord’s reasonable
approval (as approved, the “Approved Working Drawings”). Tenant and Architect shall verify, in the field, the dimensions and conditions as shown on the relevant portions of the base building plans, and Tenant and Architect shall be
solely responsible for the same, and Landlord shall have no responsibility in connection therewith. Landlord’s review of the Construction Drawings as set forth in this Section shall be for its sole purpose and shall not imply Landlord’s
review of the same, or obligate Landlord to review the same, for quality, design, Code compliance or other like matters. Accordingly, notwithstanding that any Construction Drawings are reviewed by Landlord or its space planner, architect, engineers
and consultants, and notwithstanding any advice or assistance which may be rendered to Tenant by Landlord or Landlord’s space planner, architect, engineers, and consultants, Landlord shall have no liability whatsoever in connection therewith
and shall not be responsible for any omissions or errors contained in the Construction Drawings or the Approved Working Drawings. 
 1.2 Approved Working Drawings. In no event shall Tenant commence any construction work prior to Landlord’s written approval of the Construction Drawings. Landlord will notify Tenant of
Landlord’s approval (or disapproval) of any Construction Drawings within ten (10) Business Days of receipt of same. After approval by Landlord of the Construction 

 
Drawings, Tenant shall submit the same to the appropriate municipal authorities for all applicable building permits. Tenant hereby agrees that neither Landlord nor Landlord’s consultants
shall be responsible for obtaining any building permit or certificate of occupancy for the Expansion Space and that obtaining the same shall be Tenant’s responsibility; provided, however, that Landlord shall cooperate with Tenant in executing
permit applications and performing other ministerial acts reasonably necessary to enable Tenant to obtain any such permit or certificate of occupancy. Tenant shall not commence construction until all required governmental permits are obtained. No
changes, modifications or alterations in the Approved Working Drawings may be made without the prior written approval of Landlord. 
 1.3 Landlord’s Approval. Landlord’s approval of any matter under this Work Agreement may be withheld in Landlord’s sole and absolute discretion if Landlord determines that the same
would violate any provision of the Lease or this Work Agreement or would adversely affect the mechanical, electrical, plumbing, heating, ventilating and air conditioning, life-safety or other systems of the Building, the curtain wall of the
Building, the structure or exterior appearance of the Building, or any other tenant’s use of such other tenant’s leased premises in the Building. 
 SECTION 2 
 TENANT IMPROVEMENTS 

2.1 Allowance. Tenant shall be entitled to an allowance (the “Allowance”) in the amount of (1) up to $50.00
per rentable square foot in the 10th Floor Space (i.e., $879,900.00) (the “10th Floor Allowance”), (2) up to $10.00 per rentable square foot in Suites 700 and 800 (i.e., $318,630.00) and (3) up to $15.00 per rentable
square foot in Suite 1100 (i.e., $263,970.00) for the costs relating to the initial design and construction of Tenant’s improvements which are permanently affixed to the Expansion Space (the “Tenant Improvements”). Tenant may
use the Allowance among the floors comprising the Expansion Space and does not have to use the Allowance based on the manner the Allowance is calculated; provided, however, that Tenant will be required to apply at least the 10th Floor Allowance to
Allowance Items attributable to the 10th Floor Space. In no event shall Landlord be obligated to make disbursements pursuant to this Work Agreement in a total amount which exceeds the Allowance. In the event that the Allowance is not fully utilized
by Tenant on or before December 31, 2014, then such unused amounts shall revert to Landlord, and Tenant shall have no further rights with respect thereto. 
 2.2 Disbursement of the Allowance. 
 2.2.1 Allowance Items. Except
as otherwise set forth in this Work Agreement, the Allowance shall be disbursed by Landlord only for the following items and costs (collectively the “Allowance Items”): 

2.2.1.1 Payment of the fees of the Architect and the Engineers and payment of fees and costs reasonably incurred by Landlord for the
review of the Construction Drawings by Landlord’s third party consultants, if applicable; 
 2.2.1.2 The payment of plan
check, permit and license fees relating to construction of the Tenant Improvements; 

  
 B-2

 2.2.1.3 The cost of construction of the Tenant Improvements, including, without limitation,
after hours charges, testing and inspection costs, freight elevator usage, trash removal costs, and contractors’ fees and general conditions; 
 2.2.1.4 The cost of any changes in the Base Building when such changes are required by the Construction Drawings (including if such changes are due to the fact that such work is prepared on an unoccupied
basis), such cost to include all direct architectural and/or engineering fees and expenses incurred in connection therewith; 

2.2.1.5 The cost of any changes to the Base Building, the Construction Drawings or the Tenant Improvements required by applicable
building codes (collectively, the “Code”); 
 2.2.1.6 The cost of Landlord’s administration fee described
in Section 22(a) of the Lease; and 
 2.2.1.7 Sales and use taxes and Title 24 fees. 

2.2.2 Disbursement of Allowance. During the construction of the Tenant Improvements, Landlord shall make monthly disbursements of
the Allowance for Allowance Items for the benefit of Tenant and shall authorize the release of monies for the benefit of Tenant as follows: 
 2.2.2.1 Monthly Disbursements. On or before the fifth (5th) day of each calendar month during the construction of the Tenant Improvements (or such other date as Landlord may designate), Tenant
shall deliver to Landlord: (i) a request for payment of the Contractor (defined below), approved by Tenant, in a form to be provided by Landlord, including a schedule of values and showing the percentage of completion, by trade, of the Tenant
Improvements, which details the portion of the work completed and the portion not completed; (ii) invoices from all of Tenant’s Agents (defined below), for labor rendered and materials delivered; (iii) executed conditional
mechanic’s lien releases from all of Tenant’s Agents (along with unconditional mechanics’ lien releases with respect to payments made pursuant to Tenant’s prior submission hereunder) which shall comply with all applicable laws,
as reasonably determined by Landlord, including, without limitation, all appropriate provisions of California Civil Code Section 3262(d); and (iv) all other information reasonably requested by Landlord. Tenant’s request for payment
shall be deemed Tenant’s acceptance and approval of the work furnished and/or the materials supplied as set forth in Tenant’s payment request. Thereafter, Landlord shall deliver a check to Tenant made jointly payable to Contractor and
Tenant in payment of the lesser of: (A) Landlord’s Share (defined in Section 3.2.1 below), the amounts so requested by Tenant, as set forth in this Section, less a ten percent (10%) retention (the aggregate amount of such
retentions to be known as the “Final Retention”), and (B) the balance of any remaining available portion of the Allowance (not including the Final Retention), provided that Landlord does not dispute any request for payment
based on non-compliance of any work with the Approved Working Drawings, or due to any substandard work, or for any other reason. Landlord’s payment of such amounts shall not be deemed Landlord’s approval or acceptance of the work furnished
or materials supplied as set forth in Tenant’s payment request. 

  
 B-3

 2.2.2.2 Final Retention. Subject to the provisions of this Work Agreement, a check
for the Final Retention payable jointly to Tenant and Contractor shall be delivered by Landlord to Tenant following the completion of construction of the Tenant Improvements, provided that (i) Tenant delivers to Landlord properly executed
mechanics’ lien releases from all of Tenant’s Agents in compliance with all applicable laws, as reasonably determined by Landlord, including, without limitation, compliance with both California Civil Code Section 3262(d)(2) and either
Section 3262(d)(3) or Section 3262(d)(4); (ii) Landlord has determined that no substandard work exists which adversely affects the mechanical, electrical, plumbing, heating, ventilating and air conditioning, life-safety or other
systems of the Building, the curtain wall of the Building, the structure or exterior appearance of the Building, or any other tenant’s use of such other tenant’s leased premises in the Building; (iii) Architect delivers to Landlord a
certificate, in a form reasonably acceptable to Landlord, certifying that the construction of the Tenant Improvements has been substantially completed; (iv) Tenant supplies Landlord with evidence that all required governmental approvals
required for Tenant to legally occupy the Premises have been obtained; and (v) Tenant has fulfilled its obligations pursuant to the terms of items (i) and (ii) of Section 3.3 below and has otherwise complied with Landlord’s
standard “close-out” requirements regarding city approvals, closeout tasks, closeout documentation regarding the general contractor, financial close-out matters, and tenant vendors. 

2.2.2.3 Other Terms. Landlord shall only be obligated to make disbursements from the Allowance to the extent costs are incurred
by Tenant for Allowance Items. 
 2.3 Standard Tenant Improvement Package. Landlord has established specifications for
the Building standard components to be used in the construction of the Tenant Improvements in the Premises (collectively, the “Building Standards”), which Building Standards shall be supplied to Tenant by Landlord. The quality of
Tenant Improvements shall be equal to or of greater quality than the quality of the Building Standards. 
 SECTION 3

 CONSTRUCTION OF THE TENANT IMPROVEMENTS 
 3.1 Tenant’s Selection of Contractors. 
 3.1.1 The Contractor.
A general contractor using union labor shall be retained by Tenant to construct the Tenant Improvements. Such general contractor (“Contractor”) shall be approved in writing by Landlord. Tenant shall deliver to Landlord written
notice of its selection of the Contractor upon such selection. 
 3.1.2 Tenant’s Agents. All subcontractors,
laborers, materialmen, and suppliers used by Tenant (such subcontractors, laborers, materialmen, and suppliers, and the Contractor to be known collectively as “Tenant’s Agents”) must be union-affiliated or approved in writing
by Landlord, which approval shall not be unreasonably withheld or delayed, provided that Landlord may require Tenant to retain certain subcontractors designated by Landlord. If Landlord does not approve any of Tenant’s proposed subcontractors,
laborers, materialmen or suppliers, Tenant shall submit other proposed subcontractors, laborers, materialmen or suppliers for Landlord’s 

  
 B-4

 
written approval. All of Tenant’s Agents shall be licensed in the State of California, capable of being bonded and shall use union labor. 

3.2 Construction of Tenant Improvements by Tenant’s Agents. 

3.2.1 Construction Contract; Cost Budget; Landlord’s Share and Tenant’s Share. Prior to Tenant’s execution of the
construction contract and general conditions with Contractor (the “Contract”), Tenant shall submit the Contract to Landlord for its approval, which approval shall not be unreasonably withheld or delayed. As construction progresses,
on a monthly basis, Tenant shall be responsible for the payment of Tenant’s Share (defined below) of the monthly allocation of the Final Costs, and Landlord shall be responsible for the payment of Landlord’s Share of such monthly Final
Costs. As used herein, “Tenant’s Share” shall mean a portion of the Final Costs equal to the Final Costs multiplied by a fraction, the denominator of which is the Final Costs and the numerator of which is the Allowance, and
“Landlord’s Share” shall mean a portion of the Final Costs equal to the Final Costs multiplied by a fraction, the denominator of which is the Final Costs and the numerator of which is the sum arrived at by deducting the
Allowance from the Final Costs. In the event that, after the initial determination of the Final Costs has been delivered by Tenant to Landlord, the costs relating to the design and construction of the Tenant Improvements shall change,
Landlord’s Share and Tenant’s Share shall be adjusted, as necessary, to account for such change(s). 
 3.2.2
Tenant’s Agents. 
 3.2.2.1 Landlord’s General Conditions for Tenant’s Agents and Tenant Improvement
Work. Construction of the Tenant Improvements shall comply with the following: (i) the Tenant Improvements shall be constructed in strict accordance with the Approved Working Drawings; (ii) Tenant’s Agents shall submit schedules
of all work relating to the Tenant Improvements to Landlord and Landlord shall, within five (5) business days of receipt thereof, inform Tenant’s Agents of any changes which are necessary thereto, and Tenant’s Agents shall adhere to
such corrected schedule; and (iii) Tenant shall abide by all rules made by Landlord’s Building manager with respect to the use of freight, loading dock and service elevators, any required shutdown of utilities (including life-safety
systems), storage of materials, coordination of work with the contractors of other tenants, and any other matter in connection with this Work Agreement, including, without limitation, the construction of the Tenant Improvements. 

3.2.2.2 Indemnity. Tenant’s indemnity of Landlord as set forth in the Lease shall also apply with respect to any and all
costs, losses, damages, injuries and liabilities related in any way to any act or omission of Tenant or Tenant’s Agents, or anyone directly or indirectly employed by any of them, or in connection with Tenant’s non-payment of any amount
arising out of the Tenant Improvements and/or Tenant’s disapproval of all or any portion of any request for payment. Such indemnity by Tenant, as set forth in the Lease, shall also apply with respect to any and all costs, losses, damages,
injuries and liabilities related in any way to Landlord’s performance of any ministerial acts reasonably necessary (i) to permit Tenant to complete the Tenant Improvements, and (ii) to enable Tenant to obtain any building permit or
certificate of occupancy for the Premises. 

  
 B-5

 3.2.2.3 Requirements of Tenant’s Agents. Each of Tenant’s Agents shall
guarantee to Tenant and for the benefit of Landlord that the portion of the Tenant Improvements for which it is responsible shall be free from any defects in workmanship and materials for a period of not less than one (1) year from the date of
completion thereof. Each of Tenant’s Agents shall be responsible for the replacement or repair, without additional charge, of all work done or furnished in accordance with its contract that shall become defective within one (1) year after
the completion of the work performed by such contractor or subcontractor. The correction of such work shall include, without additional charge, all additional expenses and damages incurred in connection with the removal or replacement of all or any
part of the Tenant Improvements, and/or the Building and/or common areas that may be damaged or disturbed thereby. All such warranties or guarantees as to materials or workmanship of or with respect to the Tenant Improvements shall be contained in
the Contract or subcontract and shall be written such that such guarantees or warranties shall inure to the benefit of both Landlord and Tenant, as their respective interests may appear, and can be directly enforced by either. Tenant covenants to
give to Landlord any assignment or other assurances as may be necessary to effect such right of direct enforcement. 
 3.2.2.4
Insurance Requirements. 
 3.2.2.4.1 General Coverages. All of Tenant’s Agents shall carry worker’s
compensation insurance covering all of their respective employees, and shall also carry public liability insurance, including property damage, all with limits, in form and with companies as are required to be carried by Tenant as set forth in the
Lease. 
 3.2.2.4.2 Special Coverages. Tenant shall carry “Builder’s All Risk” insurance in an amount
approved by Landlord covering the construction of the Tenant Improvements, and such other insurance as Landlord may require, it being understood and agreed that the Tenant Improvements shall be insured by Tenant pursuant to the Lease immediately
upon completion thereof. Such insurance shall be in amounts and shall include such extended coverage endorsements as may be reasonably required by Landlord including, but not limited to, the requirement that all of Tenant’s Agents shall carry
excess liability and Products and Completed Operations Coverage insurance, each in amounts not less than $1,000,000 per incident, $2,000,000 in the aggregate, and in form and with companies as are required to be carried by Tenant as set forth in the
Lease. 
 3.2.2.4.3 General Terms. Certificates for all insurance carried pursuant to this Section shall be delivered to
Landlord before the commencement of construction of the Tenant Improvements and before the Contractor’s equipment is moved onto the site. All such policies of insurance must contain a provision that the company writing said policy will give
Landlord thirty (30) days’ prior written notice of any cancellation or lapse of the effective date or any reduction in the amounts of such insurance. In the event that the Tenant Improvements are damaged by any cause during the course of
the construction thereof, Tenant shall immediately repair the same at Tenant’s sole cost and expense. Tenant’s Agents shall maintain all of the foregoing insurance coverage in force until the Tenant Improvements are fully completed and
accepted by Landlord, except for any Products and Completed Operations Coverage insurance required by Landlord, which is to be maintained for four (4) years following completion of the work and acceptance by Landlord and Tenant. All policies
carried under this 

  
 B-6

 
Section shall insure Landlord and Tenant, as their interests may appear, as well as Contractor and Tenant’s Agents. All insurance, except Workers’ Compensation, maintained by
Tenant’s Agents shall preclude subrogation claims by the insurer against anyone insured thereunder. Such insurance shall provide that it is primary insurance as respects Landlord and Tenant and that any other insurance maintained by Landlord or
Tenant is excess and noncontributing with the insurance required hereunder. The requirements for the foregoing insurance shall not derogate from the provisions for indemnification of Landlord by Tenant under this Work Agreement. 

3.2.3 Governmental Compliance. The Tenant Improvements shall comply in all respects with the following: (i) the Code and
other state, federal, city or quasi-governmental laws, codes, ordinances and regulations, as each may apply according to the rulings of the controlling public official, agent or other person or entity; (ii) applicable standards of the American
Insurance Association (formerly, the National Board of Fire Underwriters) and the National Electrical Code; and (iii) building material manufacturer’s specifications. 

3.2.4 Inspection by Landlord. Landlord shall have the right to inspect the Tenant Improvements at all times, provided however,
that Landlord’s failure to inspect the Tenant Improvements shall in no event constitute a waiver of any of Landlord’s rights hereunder nor shall Landlord’s inspection of the Tenant Improvements constitute Landlord’s approval of
the same. Should Landlord disapprove any portion of the Tenant Improvements, Landlord shall notify Tenant in writing of such disapproval and shall specify the items disapproved. Any defects or deviations in, and/or disapproval by Landlord of, the
Tenant Improvements shall be rectified by Tenant at no expense to Landlord, provided however, that in the event Landlord determines that a defect or deviation exists or disapproves of any matter in connection with any portion of the Tenant
Improvements and such defect, deviation or matter might adversely affect the mechanical, electrical, plumbing, heating, ventilating and air conditioning or life-safety systems of the Building, the structure or exterior appearance of the Building or
any other tenant’s use of such other tenant’s leased premises, Landlord may take such action as Landlord deems necessary, at Tenant’s expense and without incurring any liability on Landlord’s part, to correct any such defect,
deviation and/or matter, including, without limitation, causing the cessation of performance of the construction of the Tenant Improvements until such time as the defect, deviation and/or matter is corrected to Landlord’s satisfaction.

 3.2.5 Meetings. Commencing at least thirty (30) days prior to the commencement of construction, Tenant shall hold
weekly meetings, at a reasonable time, with the Architect and the Contractor regarding the progress of the preparation of Construction Drawings and the construction of the Tenant Improvements, and Landlord and/or its agents shall receive prior
written notice of, and shall have the right to attend, all such meetings, and, upon Landlord’s request, certain of Tenant’s Agents shall attend such meetings. In addition, minutes shall be taken at all such meetings, a copy of which
minutes shall be promptly delivered to Landlord. One such meeting each month shall include the review of Contractor’s current request for payment. 
 3.3 Notice of Completion; Copy of Record Set of Plans. Within ten (10) business days after completion of construction of the Tenant Improvements, Tenant shall cause a Notice of Completion to
be recorded in the office of the Recorder of the county in which the Building is located in accordance with Section 3093 of the California Civil Code or any successor statute, 

  
 B-7

 
shall furnish a copy thereof to Landlord upon such recordation, and shall timely give all notices required pursuant to Section 3259.5 of the California Civil Code or any successor statute.
If Tenant fails to do so, Landlord may execute and file such Notice of Completion and give such notices on behalf of Tenant as Tenant’s agent for such purpose, at Tenant’s sole cost and expense. Within thirty (30) days following the
completion of construction, (i) Tenant shall cause the Architect and Contractor (A) to update the Approved Working Drawings as necessary to reflect all changes made to the Approved Working Drawings during the course of construction,
(B) to certify to the best of their knowledge that the updated drawings are true and correct, which certification shall survive the expiration or termination of the Lease, and (C) to deliver to Landlord two (2) CD ROMS of such updated
drawings in accordance with Landlord’s then current CAD format requirements, and (ii) Tenant shall deliver to Landlord a copy of all warranties, guaranties, and operating manuals and information relating to the improvements, equipment, and
systems in the Premises. 
 SECTION 4 
 MISCELLANEOUS 
 4.1 Tenant’s Representative. Tenant has
designated Grant Boles as its sole representative with respect to the matters set forth in this Work Agreement, who shall have full authority and responsibility to act on behalf of Tenant as required in this Work Agreement. 

4.2 Landlord’s Representative. Landlord has designated Calvin Meeder as its sole representative with respect to the matters
set forth in this Work Agreement, who, until further notice to Tenant, shall have full authority and responsibility to act on behalf of Landlord as required in this Work Agreement. 

4.3 Time of the Essence in This Work Agreement. Unless otherwise indicated, all references herein to a “number of days”
shall mean and refer to calendar days. If any item requiring approval is timely disapproved by Landlord, the procedure for preparation of the document and approval thereof shall be repeated until the document is approved by Landlord. 

4.4 Tenant’s Lease Default. Notwithstanding any provision to the contrary contained in the Lease, if an event of default as
described in the Lease or this Work Agreement has occurred at any time on or before the completion of the Tenant Improvements, then (i) in addition to all other rights and remedies granted to Landlord pursuant to the Lease, Landlord shall have
the right to withhold payment of all or any portion of the Allowance and/or Landlord may cause Contractor to cease the construction of the Tenant Improvements, and (ii) all other obligations of Landlord under the terms of this Work Agreement
shall be forgiven until such time as such default is cured pursuant to the terms of the Lease. 

  
 B-8

 [TO BE CONFIRMED] 

EXHIBIT C 

SUPERIOR RIGHTS 
  

					
	 Right
	 	 Superior Right Holder
	 	 Encumbers

			
	(i) Right of First Offer	 	Ogletree Deakins	 	Suite 1208
			
	(ii) Renewal Option	 	Ogletree Deakins	 	Suite 1225
			
	(iii) Renewal Option	 	ERS	 	Suite 1275Amendment No. 1 to Credit Agreement

 Exhibit 10.1 
 AMENDMENT NO. 1 
 THIS AMENDMENT NO. 1, dated as of March 20,
2012 (this “Amendment”), to the Credit Agreement, dated as of October 1, 2010 (as the same may e amended, restated, supplemented or otherwise modified from time to time prior to the date hereof, the “Credit
Agreement”) by and among CRESTWOOD MIDSTREAM PARTNERS LP (F/K/A QUICKSILVER GAS SERVICES LP), a Delaware limited partnership (the “Borrower”), the several banks and other financial institutions or entities from time
to time party thereto (the “Lenders”) and BNP PARIBAS (“BNP”), as Administrative Agent (the “Administrative Agent”), Swingline Lender and Issuing Bank. 

RECITALS: 

WHEREAS, pursuant to the Credit Agreement, the Lenders have agreed to make certain loans and other extensions of credit to the
Borrower; 
 WHEREAS, the Borrower has further requested that the Credit Agreement be amended as set forth herein; and

 WHEREAS, the Required Lenders are willing to agree to this Amendment on the terms set forth herein. 

NOW, THEREFORE, in consideration of the premises and agreements, provisions and covenants herein contained, the parties hereto
agree as follows: 
 SECTION 1. Capitalized Terms. Capitalized terms used but not defined herein shall have the meanings
assigned to such terms in the Credit Agreement. 
 SECTION 2. Amendment of the Credit Agreement. The Credit Agreement
shall be amended as of the Amendment Effective Date (as defined below) as set forth below. 
 (a) Amendments to
Section 1.01 (Defined Terms). Section 1.01 of the Credit Agreement is hereby amended by inserting the following definitions in proper alphabetical order: 
 “Antero Acquisition” shall mean the acquisition by the Antero JV of certain assets of Antero Resources Appalachian Corporation or its affiliates previously identified to the
Administrative Agent. 
 “Antero Investment” shall mean an investment by the Borrower in the Antero JV, the
proceeds of which are used by the Antero JV to consummate the Antero Acquisition; provided that the Antero Investment shall not exceed $160,000,000. 
 “Antero JV” shall mean a joint venture between Crestwood Holdings LLC and the Borrower formed in connection with the Antero Investment. 

(b) Amendments to Section 6.04 (Investments, Loans and Advances). Section 6.04 of the Credit Agreement is hereby amended
as follows: 
 (i) by deleting the “and” at the end of Section 6.04(o); 

(ii) by replacing the period at the end of Section 6.04(p) with a semicolon and adding “and” immediately thereafter; and

 (iii) by adding the following Section 6.04(q) immediately after Section 6.04(p):

 “the Antero Investment.” 
 SECTION 3. Conditions to Effectiveness. This Amendment shall become effective on the date on which (the “Amendment Effective Date”) the Administrative Agent shall have received a
counterpart of this Amendment, executed and delivered by a duly authorized officer of each of (i) the Borrower and (ii) the Required Lenders. 
 SECTION 4. Representations and Warranties of the Borrower. The Borrower hereby represents and warrants, as of the Amendment Effective Date, as follows: 

(a) Each of the representations and warranties contained in Article III of the Credit Agreement and the other Loan Documents is true and
correct in all material respects on and as of the Amendment Effective Date as if made on and as of such date except to the extent that such representations and warranties expressly specifically refer to an earlier date (in which case such
representations and warranties are true and correct in all material respects as of such earlier date); 
 (b) The Collateral
Agreement will be effective, upon and after the consummation of the Antero Acquisition (as defined in the Credit Agreement as amended hereby), to create in favor of the Collateral Agent, for the benefit of the Secured Parties, a legal, valid,
enforceable and fully perfected Lien on, and security interest in, the Equity Interests of the Antero JV held, directly or indirectly, by the Borrower, in each case, that is prior and superior in right to any other Person other than Liens arising
(and that have priority) by operation of law; and 
 (c) No Default or Event of Default exists, both before and after giving
effect to this Amendment. 
 SECTION 5. Effects on Loan Documents. 

(a) Except as specifically amended herein, all Loan Documents shall continue to be in full force and effect and are hereby in all respects
ratified and confirmed. 
 (b) The execution, delivery and effectiveness of this Amendment shall not operate as a waiver of any
right, power or remedy of any Lender or the Administrative Agent under any of the Loan Documents, nor constitute a waiver of any provision of the Loan Documents. 
 (c) The Borrower and the other parties hereto acknowledge and agree that this Amendment shall constitute a Loan Document. 
 SECTION 6. Amendments; Execution in Counterparts. 
 (a) This Amendment shall
not constitute an amendment of any other provision of the Credit Agreement not referred to herein and shall not be construed as a waiver or consent to any further or future action on the part of the Borrower that would require a waiver or consent of
the Required Lenders or the Administrative Agent. Except as expressly amended hereby, the provisions of the Credit Agreement are and shall remain in full force and effect. 
 (b) This Amendment may not be amended nor may any provision hereof be waived except pursuant to a writing signed by the Borrower, the Administrative Agent and the Required Lenders party hereto. This
Amendment may be executed by one or more of the parties hereto on any number of separate counterparts, and all of said counterparts taken together shall be deemed to constitute one and the same instrument. Delivery of an executed signature page of
this Amendment by facsimile or other electronic submission shall be effective as delivery of a manually executed counterpart hereof. 

 SECTION 7. GOVERNING LAW; WAIVER OF JURY TRIAL. THIS AMENDMENT SHALL BE CONSTRUED IN
ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE STATE OF NEW YORK. EACH PARTY HERETO HEREBY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION DIRECTLY OR INDIRECTLY
ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS AMENDMENT OR ANY OF THE OTHER LOAN DOCUMENTS. EACH PARTY HERETO (i) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER
PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER AND (ii) ACKNOWLEDGES THAT IT AND THE OTHER PARTIES HERETO HAVE BEEN INDUCED TO ENTER INTO THIS AMENDMENT AND THE OTHER LOAN DOCUMENTS, AS APPLICABLE, BY, AMONG
OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION. 
 [Remainder of page intentionally left blank] 

 IN WITNESS WHEREOF, each of the undersigned has caused its duly authorized officer
to execute and deliver this Amendment as of the date first written above. 
  

			
	UBS LOAN FINANCE LLC
		
	By:	 	/s/ Mary E. Evans
	Name:	 	Mary E. Evans
	Title:	 	Associate Director
		
	By:	 	 /s/ Irja R. Otsa

	Name:	 	Irja R. Otsa
	Title:	 	Associate Director
	
	Notice Address:
	        677 Washington Blvd
	        Stamford, CT 06901
	
	 Attention: Banking Products Services
 Email: DL-UBSAgency@ubs.com
 Facsimile: 203-719-4176

 
			
	BNP PARIBAS
		
	By:	 	/s/ Andrew Ostrov
	Name:	 	Andrew Ostrov
	Title:	 	Director
		
	By:	 	 /s/ Larry Robinson

	Name:	 	Larry Robinson
	Title:	 	Director

 
			
	Citibank, N.A.
		
	By:	 	/s/ Todd Mogil
	Name:	 	Todd Mogil
	Title:	 	Vice President

 
			
	The Royal Bank of Scotland plc
		
	By:	 	/s/ Sanjay Remond
	Name:	 	Sanjay Remond
	Title:	 	Authorised Signatory

 
			
	BANK OF AMERICA, N.A., as Lender
		
	By:	 	/s/ Ronald E. McKaig
	Name:	 	Ronald E. McKaig
	Title:	 	Managing Director
	
	Notice Address:
	        700 Louisiana Street
	        TX4-213-13-15
	        Houston, TX 77002
	
	 Attention: Ronald E. McKaig
 Telephone: 713-247-7237
 Facsimile: 877-283-7502

 
			
	Wells Fargo Bank, N.A.
		
	By:	 	/s/ Charles W. Randall
	Name:	 	Charles W. Randall
	Title:	 	Managing Director
	
	Notice Address:
	        Wells Fargo Bank, N.A.
	        1000 Louisiana St., Suite 900
	        Houston, TX 77002
	
	 Attention: Chuck Randall
 Telephone: 713-319-1306
 Facsimile: 713-319-1925

 
			
	BRANCH BANKING AND TRUST COMPANY
		
	By:	 	/s/ Ryan K. Michael
	Name:	 	Ryan K. Michael
	Title:	 	Senior Vice President
	
	Notice Address:
	        BB&T Capital Markets Energy Group
	        818 Town & Country Blvd., Suite 410
	        Houston, TX 77024
	
	 Attention: Cheri Allen
 Telephone: 713-797-2144
 Facsimile: 713-932-6285

 
			
	Royal Bank of Canada
		
	By:	 	/s/ Jim Allred
	Name:	 	Jim Allred
	Title:	 	Authorized Signatory
	
	Notice Address:
	        Three World Financial Center
	        200 Vesey Street
	        New York, NY 10281-8098
	
	 Attention: US Specialized Service Officer
 Telephone: 416-955-6599
 Facsimile: 212-428-2372

 
			
	REGIONS BANK
		
	By:	 	/s/ David Valentine
	Name:	 	David Valentine
	Title:	 	Vice President
	
	Notice Address:
	        5005 Woodway Drive, Suite 110
	        Houston, TX 77056
	
	 Attention: David Valentine
 Telephone: 713-426-7141
 Facsimile: 713-426-7180

 
			
	BANK OF MONTREAL
		
	By:	 	/s/ Kevin Utsey
	Name:	 	Kevin Utsey
	Title:	 	Director
	
	Notice Address:
	        700 Louisiana Street, Suite 2100
	        Houston, TX 77002
	
	 Attention: Gumaro Tijerina
 Telephone: 713-546-9744
 Facsimile: 713-223-4007

 
			
	BARCLAYS BANK PLC,
		
	By:	 	/s/ Sreedhar R. Kona
	Name:	 	Sreedhar R. Kona
	Title:	 	Assistant Vice President
	
	Notice Address:
	        745 Seventh Ave.
	        New York, NY 10019
	
	 Attention: Sreedhar R. Kona
 Telephone: 212-526-7808
 Facsimile: 212-526-5115

 
			
	CRESTWOOD MIDSTREAM PARTNERS LP
	
	By: Crestwood Gas Services GP LLC, its general partner
		
	By:	 	/s/ Kelly J. Jameson
	Name:	 	Kelly J. Jameson
	Title:	 	Senior Vice President and General Counsel

			
	Consented to by:
	
	 BNP PARIBAS

as Administrative Agent, Swingline Lender
 and
Issuing Bank

		
	By:	 	/s/ Andrew Ostrov
	Name:	 	Andrew Ostrov
	Title:	 	Director
		
	By:	 	/s/ Chris Lyons
	Name:	 	Chris Lyons
	Title:	 	Managing Director

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