Document:

Exhibit 10.13  

AMENDMENT NO. 1

TO LEASE  

        THIS AMENDMENT NO. 1 is made and entered into this
16th day of June, 1992, by and between JOHN ARRILLAGA, TRUSTEE, or his Successor
Trustee UTA dated 7/20/77 (John Arrillaga Separate Property Trust) as amended, and RICHARD T. PEERY, TRUSTEE, or his Successor
Trustee UTA dated 7/20/77 (Richard T. Peery Separate Property Trust) as amended, collectively as LANDLORD, and
Synopsys, Inc., a Delaware corporation, as TENANT. 

RECITALS  

        A.    WHEREAS, by Lease Agreement dated August 17, 1990 Landlord leased to Tenant all of that certain
104,170± square foot building located at 700C East Middlefield Rd., Mountain View, California, the details of which are more particularly set
forth in said August 17, 1990 Lease Agreement (the "Lease"), and 

        B.    WHEREAS, said Lease was amended by the Commencement Letter dated April 1, 1991 which amended the commencement date
of the Lease to commence March 15, 1991 and terminate March 14, 1999, and 

        C.    WHEREAS, on even date herewith the Landlord and Tenant are entering into a Lease Agreement for that certain
104,170± square foot building located at 700B East Middlefield Rd., Mountain View, California, (the "Building B Lease
Agreement"), and 

        D.    WHEREAS, it is now the desire of the parties hereto to amend the Lease by extending the Term of the Lease to be
co-terminous with the term of the Building B Lease Agreement which extension is projected to be one year seven months eighteen days, amending the Basic Rent, Paragraph 31
"Notices" and Paragraph 51 "Hazardous Materials" of the Lease Agreement and replacing the
existing Exhibit A to said Lease with the Revised Exhibit A to Lease Agreement dated August 17, 1990 as hereinafter set forth. 

AGREEMENT  

        NOW THEREFORE, for valuable consideration, receipt of which is hereby acknowledged, and in consideration of the
hereinafter mutual promises, the parties hereto do agree as follows: 

        1.    TERM OF LEASE:    Subject to
Paragraph 2 below, it is agreed between the parties that the term of the Lease shall be extended for an additional one year seven month eighteen day period, from March 15, 1999 to
October 31, 2000. 

        2.    LEASE TERMS
CO-TERMINOUS:    It is acknowledged that (i) concurrently with the execution of this Amendment No. 1, Landlord and Tenant are also executing
a lease dated June 16, 1992 affecting adjacent property, and (ii) it is the intention of the parties that the term of said Lease Agreement dated August 17, 1990 be
co-terminous with the term of Lease Agreement dated June 16, 1992, such that the terms of Lease Agreement dated June 16, 1992 and Lease Agreement dated August 17, 1990
expire on the same date. Therefore, it is acknowledged that the implementation of this paragraph may result in an extension of the term of Lease Agreement dated August 17, 1990, in which event
Tenant shall continue to pay rent at the rate applicable for the period immediately prior to the adjusted lease term expiration date. As soon as the commencement date of Lease Agreement dated
June 16, 1992 has been determined following completion of improvements and satisfaction of other appropriate conditions, the parties shall execute, if necessary, an amendment to Lease Agreement
dated August 17, 1990 establishing the applicable termination date of said Lease in accordance with the foregoing provisions of this paragraph. 

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        3.    BASIC RENT SCHEDULE:    Subject to
Paragraph 2 above, the monthly Basic Rental shall be adjusted as follows: 

        On
March 1, 1996 the sum of ONE HUNDRED SEVENTY ONE THOUSAND EIGHT HUNDRED EIGHTY AND 50/100 DOLLARS ($171,880.50) shall be due, and a like sum due on the first day of each month
thereafter through and including March 1, 1999. 

        On
April 1, 1999 the sum of ONE HUNDRED EIGHT TWO THOUSAND TWO HUNDRED NINETY SEVEN AND 50/100 DOLLARS ($182,297.50) shall be due, and a like sum due on the first day of each
month thereafter through and including October 1, 2000 or, if later due to the co-terminous provision of Paragraph 2, the first day of the last month of the Lease. 

        The
aggregate rental for the Lease shall be increased by $3,177,912.77 or from $16,882,332.45 to $20,060,245.22. 

        4.    NOTICES:    Lease Agreement
Paragraph 31 entitled "Notices" shall be amended such that all notices, demands, requests, advices or designations by Landlord to Tenant shall be
sufficiently given, made or delivered if personally served on Tenant by leaving the same at the Premises (provided written receipt is offered) and is addressed to the attention of Brooke Seawell, Vice
President of Finance and Operations. 

        5.    HAZARDOUS MATERIALS:    It is hereby
agreed between the parties that the existing Paragraph 51 "Hazardous Materials" of the aforementioned Lease Agreement shall be considered null
and void and shall be replaced with the following: 

"Landlord
and Tenant agree as follows with respect to the existence or use of "Hazardous Materials" (as defined herein) on the Premises and real
property located beneath said Premises (hereinafter collectively referred to as the "Property"); 

As
used herein, the term "Hazardous Materials" shall mean any hazardous or toxic substance, chemical, material or waste which is or becomes subject to
or regulated by any local governmental authority, the State of California, or the United States Government. The term "Hazardous Materials" includes,
without limitation, any material or hazardous substance which is (i) listed under Article 9 or defined as "hazardous" or
"extremely hazardous" pursuant to Article 11 of Title 22 of the California Administrative Code, Division 4, Chapter 30, (ii) listed or
defined as a "hazardous waste" pursuant to the Federal Resource Conversation and Recovery Act, Section 42 U.S.C. Section 6901  et, seq.,
(iii) listed or defined as a "hazardous substance" pursuant to the Comprehensive
Environmental Response, Compensation and Liability Act, 42 U.S.C. Section 9601, et. Seq. (42 U.S.C. Section 9601), (iv) petroleum
or any derivative of petroleum, or (v) asbestos. 

To
the best of Landlord's knowledge, as of the date of this Lease Agreement, the Property and the ground water are not in violation of any federal, state or local statute, regulation or ordinance
relating to environmental conditions and to the best of Landlord's knowledge, there has been no release or discharge of Hazardous Materials at the Property or in the ground water by Landlord or any
other person in violation of any laws; however, Landlord shall have no obligation to investigate the same. 

Tenant
shall have no obligation to "clean up", to comply with any law regarding, or to reimburse, release, indemnify, or defend Landlord with respect to
any Hazardous Materials which Tenant, its employees, agents, subtenants (if any) assignees or affiliates (prior to, during or after the term of the Lease) did not store, dispose, or transport in, use,
generate, release or discharge or cause to be on the Property in violation of applicable law. Subject to the entire provisions of this Paragraph 51, Tenant will be 100 percent liable and
responsible only for any and all "cleanup" of Hazardous Materials contamination on, in, under or about the Property resulting from the use, storage,
disposal, generation, release, discharge or transportation of Hazardous Materials in violation of applicable law; (1) on the Property by Tenant, its employees, subtenants (if any), agents,
assignees or affiliates, (prior to, during, 

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or
after the term of the Lease), or (2) in the building during the term of this Lease, by Tenant, its employees, subtenants (if any), agents, assignees or affiliates or any third party
(excluding Landlord, Landlord's agents, employees or contractors). In the event Tenant has work done in the building after the commencement of the Lease, which work is the responsibility of Tenant and
not Landlord under this Lease, then it is agreed and understood that for the purposes of this Paragraph 51, the person or entity performing such work shall not be deemed an employee, agent or
contractor of Landlord by virtue of Landlord's recommendation, or at Tenant's request, engagement of such person or entity, to work on Tenant's behalf. It is understood that seepage from an offsite
source onto the Property is not Tenant's responsibility provided Tenant did not cause such "seepage." Subject to the entire provisions of this
Paragraph 51, Tenant shall indemnify, defend and hold Landlord harmless from and against any liabilities, demands, costs, expenses and any and all damages, including without limitation,
diminution in value of the Property, damage for the loss or restriction on the use, marketability or any other amenity of the Property, and including, without limitation, attorney fees incurred as a
result of any claims resulting from Hazardous Materials contamination for which Tenant is responsible for clean-up under this Paragraph 51, including any claims from third parties
resulting from such Hazardous Materials contamination. 

Subject
to the entire provisions of Paragraph 51, (Hazardous Materials) Landlord will be 100% liable and responsible for any and all clean up of Hazardous Materials contamination on, under or
about the Property for which Tenant is not responsible for cleanup pursuant to the preceding paragraph. However, notwithstanding anything to the contrary in this Lease, it is agreed that Landlord will
not be responsible for: (i) Hazardous Materials contamination that Tenant is required to clean up pursuant to the preceding paragraph of this Paragraph 51, or (ii) any disruption
to Tenant's business as a result of any such cleanup. 

Landlord
shall have no obligation to "clean up", to comply with any law regarding Hazardous Materials, or to reimburse, release, indemnify, or defend
Tenant with respect to any Hazardous Materials for which Tenant, its employees, agents, subtenants (if any) assignees or affiliates (prior to, during or after the term of the Lease) store, generate,
release, discharge, dispose, or transport in, use, or cause to be on the Property in violation of applicable law. It is clearly understood and agreed to by Landlord and Tenant that Tenant, not
Landlord, is responsible for the above. 

Subject
to the entire provisions of this Paragraph 51, Landlord will indemnify, defend and hold Tenant harmless from any liabilities, demands, costs, expense and damages (including, without
limitation, attorney fees) including any claims from third parties against Tenant (excluding, however, claims made by employees of Tenant), resulting from Hazardous Materials contamination which
Landlord is required to clean up pursuant to the terms of this Paragraph 51. 

Tenant
also agrees not to use or dispose of any Hazardous Materials on the Property without first obtaining Landlord's written consent. In the event consent is granted by Landlord, then with respect
with Hazardous Materials used by Tenant, Tenant agrees to complete compliance, at Tenant's sole cost, with governmental regulations, and prior to the termination of said Lease Tenant agrees, with
respect to Hazardous Materials used by Tenant, to follow the proper closure procedures and will obtain a clearance from the local fire department and/or the appropriate city agency. If Tenant uses
Hazardous Materials or if Tenant is responsible or liable for Hazardous Materials contamination on the Property Tenant also agrees to install such Hazardous Materials monitoring devices as Landlord
deems reasonably necessary which relate to Hazardous Materials used by Tenant. It is agreed that each parties' responsibility related to Hazardous Materials will survive the termination date of the
Lease and that each party may obtain specific performance of the others responsibilities under this Paragraph 51. 

        6.    REPLACEMENT OF EXHIBIT A:    It
is hereby agreed between the parties that the existing Exhibit A to Lease Agreement dated August 17, 1990 shall be considered null and void and shall be replaced with the Revised
Exhibit A to Lease Agreement dated August 17, 1990 attached hereto. 

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        EXCEPT AS MODIFIED HEREIN, all other terms, covenants, and conditions of the Lease shall remain in full force and effect. 

        IN WITNESS WHEREOF, Landlord and Tenant have executed this Amendment No. 1 to Lease as of the day and year first hereinabove set
forth. 

	LANDLORD:	 	TENANT:
	
JOHN ARRILLAGA SEPARATE PROPERTY TRUST	
 	

SYNOPSYS, INC.
 a Delaware corporation
	

By:	

/s/ John Arrillaga
 John Arrillaga, Trustee	
 	

By:	

/s/ Harvey C. Jones

	 	 	 	Harvey C. Jones

	 	 	 	Print or Type Name
	
RICHARD T. PEERY SEPARATE PROPERTY TRUST	
 	

Title:	

President

	

By:	

/s/ Richard T. Peery
 Richard T. Peery, Trustee	
 	

Dated:	

June 16, 1992

4Exhibit 10.14  

AMENDMENT NO. 4

TO LEASE  

        THIS AMENDMENT NO. 4 is made and entered into this 18th day of July, 2001, by and between JOHN ARRILLAGA, Trustee, or his Successor Trustee UTA dated 7/20/77
(JOHN ARRILLAGA SURVIVOR'S TRUST) (previously known as the "Arrillaga Family Trust" and the "John Arrillaga Separate Property Trust") as amended, and RICHARD T. PEERY, Trustee, or his Successor
Trustee UTA dated 7/20/77 (RICHARD T. PEERY SEPARATE PROPERTY TRUST) as amended, collectively as LANDLORD, and SYNOPSYS, INC., a Delaware corporation, as TENANT. 

RECITALS  

        A. WHEREAS, by Lease Agreement dated June 16, 1992 Landlord leased to Tenant all of that certain 104,170+/- square foot building located at 700B E.
Middlefield Road, Mountain View, California, the details of which are more particularly set forth in said June 16, 1992 Lease Agreement, and 

        B.
WHEREAS, said Lease was amended by the Commencement Letter dated March 9, 1993 which changed the Commencement Date of the Lease from November 1, 1992 to
December 21, 1992, and changed the Termination Date from October 31, 2000 to December 31, 2000, and, 

        C.
WHEREAS, said Lease was amended by Amendment No. 1 dated June 23, 1993, which: (i) established December 21, 1993 as the Commencement Date for the second
floor of the Premises; (ii) extended the Term for two years, changing the Termination Date from December 31, 2000 to December 31, 2002 to be co-terminous with the
projected term of the lease agreement dated June 23, 1993 for premises located at 700A E. Middlefield Road, Mountain View, California, (iii) amended the Basic Rent Schedule;
(iv) replaced Lease Paragraph 46 ("Parking"); and (v) established June 1, 1993 as the Commencement Date for the payment of Additional Rent expenses for 100% of the
building, and 

        D.
WHEREAS, said Lease was amended by Amendment No. 2 dated November 4, 1994 which: (i) extended the Term for two months, thereby changing the Termination Date from
December 31, 2002 to February 28, 2003 to be co-terminous with the extended termination date of the lease
agreement dated June 23, 1993 for premises located at 700A E. Middlefield Road, Mountain View, California, and (ii) amended the Basic Rent Schedule and Aggregate Rent accordingly, and 

        E.
WHEREAS, said Lease was amended by Amendment No. 3 dated October 4, 1995 which: (i) amended (a) Amendment No. 1 Paragraph 3 ("Lease Terms
Co-Terminous") and (b) Lease Paragraph 49 ("Cross Default") to include reference to Tenant's other lease agreements with Landlord dated August 17, 1990,
June 23, 1993 and August 24, 1995 for premises respectively located at 700C and 700A E. Middlefield Road and 1101 W. Maude Avenue, Mountain View, California;
(ii) amended Lease Paragraph 52.B. ("Structural Capital Costs Regulated by Governmental Agencies after the Commencement of this Lease Not Caused by Tenant or Tenant's Uses or Remodeling
of the Premises") to correct an error disclosed by an audit of said Lease which required the deletion of the reference to the last four years of the Lease Term as a factor in calculating Tenant's cash
contribution towards the cost of said capital improvements; (iii) established Tenant's temporary driveway rights to adjacent property leased by Tenant at 1101 W. Maude Avenue, Mountain
View, California; and (iv) replaced Exhibit A to said Lease, and 

        F.
WHEREAS, it is now the desire of the parties hereto to amend the Lease by (i) extending the Term for twelve (12) years, thereby changing the Termination Date from
February 28, 2003 to February 28, 2015, (ii) amending the Basic Rent schedule and Aggregate Rent accordingly, (iii) increasing the Security Deposit required under the
Lease, (iv) amending the Management Fee charged to Tenant, (v) replacing Lease Paragraphs 12 ("Property Insurance") and 31 ("Notices"), (vi) amending Lease Paragraphs 5
("Acceptance and Surrender of Premises"), 6 ("Alterations and Additions"), 11 ("Tenant's Personal Property Insurance and Workman's Compensation Insurance") and 

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("Destruction"), (vii) adding a paragraph ("Authority to Execute") and (viii) deleting Lease Paragraphs 54 ("Option to Lease Building A (700A Middlefield Rd., Mt. View, CA)
Option Space"), 55 ("First Right of Refusal") and 56 ("Rights Reserved for Tenant's Personal Benefit") to the Lease Agreement as hereinafter set forth. 

AGREEMENT  

        NOW THEREFORE, for valuable consideration, receipt of which is hereby acknowledged, and in consideration of the hereinafter mutual promises, the parties hereto do
agree as follows: 

        1.     TERM
OF LEASE: It is agreed between the parties that the Term of said Lease Agreement shall be extended for an additional twelve
(12) year period, and the Lease Termination Date shall be changed from February 28, 2003 to February 28, 2015. 

        2.     BASIC
RENT: The monthly Basic Rent shall be adjusted as follows: 

        On
March 1, 2003, the sum of TWO HUNDRED TWENTY NINE THOUSAND ONE HUNDRED SEVENTY FOUR AND NO/100 DOLLARS ($229,174.00) shall be due, and a like sum due on the first day of each
month thereafter, through and including February 1, 2004. 

        On
March 1, 2004, the sum of TWO HUNDRED THIRTY FOUR THOUSAND NINE HUNDRED THREE AND 35/100 DOLLARS ($234,903.35) shall be due, and a like sum due on the first day of each month
thereafter, through and including February 1, 2005. 

        On
March 1, 2005, the sum of TWO HUNDRED FORTY THOUSAND SEVEN HUNDRED SEVENTY FIVE AND 93/100 DOLLARS ($240,775.93) shall be due, and a like sum due on the first day of each month
thereafter, through and including February 1, 2006. 

        On
March 1, 2006, the sum of TWO HUNDRED FORTY SIX THOUSAND SEVEN HUNDRED NINETY FIVE AND 33/100 DOLLARS ($246,795.33) shall be due, and like sum due on the first day of each
month thereafter, through and including February 1, 2007. 

        On
March 1, 2007, the sum of TWO HUNDRED FIFTY TWO THOUSAND NINE HUNDRED SIXTY FIVE AND 22/100 DOLLARS ($252,965.22) shall be due, and a like sum due on the first day of each
month thereafter, through and including February 1, 2008. 

        On
March l, 2008, the sum of TWO HUNDRED FIFTY NINE THOUSAND TWO HUNDRED EIGHTY NINE AND 35/100 DOLLARS ($259,289.35) shall be due, and a like sum due on the first day of each month
thereafter, through and including February 1, 2009. 

        On
March 1, 2009, the sum of TWO HUNDRED SIXTY FIVE THOUSAND SEVEN HUNDRED SEVENTY ONE AND 58/100 DOLLARS ($265,771.58) shall be due, and a like sum due on the first day of each
month thereafter, through and including February 1, 2010. 

        On
March 1, 2010, the sum of TWO HUNDRED SEVENTY TWO THOUSAND FOUR HUNDRED FIFTEEN AND 87/100 DOLLARS ($272,415.87) shall be due, and a like sum due on the first day of each month
thereafter, through and including February 1, 2011. 

        On
March 1, 2011, the sum of TWO HUNDRED SEVENTY NINE THOUSAND TWO HUNDRED TWENTY SIX AND 27/100 DOLLARS ($279,226.27) shall be due, and a like sum due on the first day of each
month thereafter, through and including February 1, 2012. 

        On
March 1, 2012, the sum of TWO HUNDRED EIGHTY SIX THOUSAND TWO HUNDRED SIX AND 92/100 DOLLARS ($286,206.92) shall be due, and a like sum due on the first day of each month
thereafter, through and including February 1, 2013. 

        On
March 1, 2013, the sum of TWO HUNDRED NINETY THREE THOUSAND THREE HUNDRED SIXTY TWO AND 10/100 DOLLARS ($293,362.10) shall be due, and a like sum due on the first day of each
month thereafter, through and including February 1, 2014. 

        On
March 1, 2014, the sum of THREE HUNDRED THOUSAND SIX HUNDRED NINETY SIX AND 15/100 DOLLARS ($300,696.15) shall be due, and a like sum due on the first day of each month
thereafter, through and including February l, 2015. 

        The
Aggregate Basic Rent for the Lease Term, as extended, shall be increased by $37,938,984.84 or from $18,964,862.00 to $56,903,846.84. 

        3.     SECURITY
DEPOSIT: Provided Tenant is not in default (pursuant to Paragraph 19 of the Lease, i.e., Tenant
has received notice and any applicable cure period has expired without cure) of any of the terms, covenants, and conditions of the Lease Agreement, the Security Deposit required under the Lease shall
remain $333,344.00. In the event of a Tenant default, Tenant's Security Deposit shall be increased by $268,048.30, or from $333,344.00 to $601,392.30. Within ten (10) days of notice from
Landlord of an uncured default under the Lease, Tenant shall (i) provide Landlord with an amended Standby Letter of Credit, in compliance with the terms of Lease Paragraph 45 ("Security
Deposit Represented by Standby Letter of Credit") in the total amount of $601,392.30 or (ii) deposit additional cash in the amount of $268,048.30. Within ten (10) business days of
Tenant's execution of this Amendment No. 4, Tenant shall provide Landlord with an amended Standby Letter of Credit reflecting an expiration date on the Standby Letter of Credit of
March 30, 2015. 

        4.     MANAGEMENT
FEE: Effective March 1, 2003, and on the first day of each month thereafter during said Lease Term, Tenant shall pay to
Landlord, in addition to the Basic Rent and Additional Rent, a fixed monthly management fee ("Management Fee") equal to one and one-half percent (1.5%) of the Basic Rent due for each month
throughout the remaining Lease Term. Notwithstanding anything to the contrary above or in Lease Paragraph 4.D ("Additional Rent"), no additional real property management fee shall be charged to
Tenant. 

        5.     PROPERTY
INSURANCE: Lease Paragraph 12 ("Property Insurance") is hereby deleted in its entirety and shall be replaced with the
following: 

        "12.
PROPERTY INSURANCE. Landlord shall purchase and keep in force, and as Additional Rent and in accordance with Paragraph 4D of this Lease, Tenant shall pay to Landlord (or
Landlord's agent if so directed by Landlord) Tenant's proportionate share (allocated to the Leased Premises by square footage or other equitable basis as calculated and determined by Landlord) of the
deductibles on insurance claims and the cost of, policy or policies of insurance covering loss or damage to the Premises (including all improvements within the Premises constructed by either Landlord
or Tenant (provided Tenant has obtained Landlord's written approval for said improvements to the Premises) and Complex (excluding routine maintenance and repairs and incidental damage or destruction
caused by accidents or vandalism for which Tenant is responsible under Paragraph 7) in the amount of the full replacement value thereof, providing protection against those perils included
within the classification of "all risks" insurance and flood and/or earthquake insurance, if available, plus a policy of rental income insurance in the amount of one hundred (100%) percent of
twelve (12) months Basic Rent, plus sums paid as Additional Rent and any deductibles related thereto. If such insurance cost is increased due to Tenant's use of the Premises or the Complex,
Tenant agrees to pay to Landlord the full cost of such increase. Tenant shall have neither interest in nor any right to the proceeds of any insurance procured by Landlord for the Complex: 

        In
addition and notwithstanding anything to the contrary in this Paragraph 12, each party to this Lease hereby waives all rights of recovery against the other party or its
officer, employees, agents and representatives for loss or damage to its property or the property of others under its control, arising from any cause insured against under the fire and extended
coverage (excluding, however, any loss resulting from Hazardous Material contamination of the Property) required to be maintained by the terms of this Lease Agreement to the extent full reimbursement
of the loss/claim is received by the insured party. Each party required to carry property insurance hereunder shall cause the policy evidencing such insurance to include a provision permitting such
release of liability ("waiver of subrogation endorsement") provided, however, that if the insurance policy of either releasing party prohibits such waiver, then this waiver shall not take effect until
consent to such waiver is obtained; provided, however, that if the insurance policy of either releasing party prohibits such waiver, then this 

waiver
shall not take effect until consent to such waiver is obtained. If such waiver is so prohibited, the insured party affected shall promptly notify the other party thereof. In the event the
waivers are issued to the parties and are not valid under current policies and/or subsequent insurance policies, the non-complying party will provide, to the other party, 30 days
advance notification of the cancellation of the subrogation waiver, in which case neither party will provide such subrogation waiver thereafter and this Paragraph will be null and void. The foregoing
waiver of subrogation shall not include any loss resulting from Hazardous Material contamination of the Property or any insurance coverage relating thereto." 

        6.     NOTICES:
Lease Paragraph 31 ("Notices") is hereby deleted in its entirety and shall be replaced with the following: 

        "31.
NOTICES. All notices, demands, requests, advices or designations which may be or are required to be given by either party to the other hereunder shall
be in writing. All notices, demands, requests, advices or designations by Landlord to Tenant shall be sufficiently given, made or delivered if personally served on Tenant by leaving the same at the
Premises (provided written receipt is offered and is addressed to the attention of the Vice President of Real Estate) or if sent by United States certified or registered mail, postage prepaid or by a
reputable same day or overnight courier service addressed to Tenant at: SYNOPSYS, INC., 700 EAST MIDDLEFIELD ROAD, MOUNTAIN VIEW, CA 94043, ATTN: VICE PRESIDENT
OF REAL ESTATE. As an accommodation to Tenant, Landlord shall also send a copy of all notices to: SHARTSIS, FRIESE & GINSBURG LLP, ONE MARITIME
PLAZA, 18TH FLOOR, SAN FRANCISCO, CA 94111, ATTN: JONATHON M. KENNEDY; however, Tenant acknowledges and agrees that any notice delivered to Tenant's main address listed
above shall be considered to be delivered to Tenant, regardless of whether or not said notice is submitted and/or received at the secondary address. All notices, demands, requests, advices or
designations by Tenant to Landlord shall be sent by United States certified or registered mail, postage prepaid, addressed to Landlord at its offices at: PEERY/ARRILLAGA,
2560 MISSION COLLEGE BLVD., SUITE 101, SANTA CLARA, CA 95054. Each notice, request, demand, advice or designation referred to in this Paragraph shall be deemed
received on the date of the personal service or receipt or refusal to accept receipt of the mailing thereof in the manner herein provided, as the case may be. Either party shall have the right, upon
ten (10) days written notice to the other, to change the address as noted herein." 

        7.     ALTERATIONS
MADE BY TENANT: The provisions of this Paragraph 7 shall modify Lease Paragraphs 5 ("Acceptance and Surrender of
Premises") and 6 ("Alterations and Additions"), as follows: 

        A.    Landlord
acknowledges that Tenant shall have the right, subject to the terms of this Paragraph 7.A, to make non-structural, interior improvements
("Interior Improvements") to the Premises subject to the following: 

        a)    Tenant
shall provide Landlord, for Landlord's approval, a set of construction plans and a list reflecting the Interior Improvements Tenant desires to make to the
Increased Premises no later than November 1, 2002. Upon Landlord's review and approval of said Interior Improvements, said construction plans shall become
Exhibit B-1 to this Lease. Construction of said Interior Improvements shall not commence until Landlord and Tenant execute Landlord's standard Consent
to Alterations agreement and Landlord has posted its Notice of Non-Responsibility; 

        b)    Landlord
shall not be required, under any circumstance, to contribute any concessions or monetary contribution to said Interior Improvements; 

        c)     Tenant
shall not be required to remove the Landlord approved Interior Improvements shown on Exhibit B-1 at the expiration
or earlier termination of the Lease Term. Notwithstanding anything to the contrary herein, Landlord's approval of said Interior Improvements referenced in Section 7.A(a) above may provide for specific
Interior Improvements to be restored at the' expiration or earlier termination of the Lease Term if said Interior Improvements are not consistent with Landlord's standard interior improvements. 

        B.    Notwithstanding
anything to the contrary in Lease Paragraph 6 ("Alterations and Additions"), Landlord's written consent to any future alterations or additions to
the Premises will specify whether Landlord shall require removal of said alterations and/or additions, provided Tenant requests such determination from Landlord. 

        8.     TENANT'S
PERSONAL PROPERTY INSURANCE AND WORKMAN'S COMPENSATION INSURANCE. The provisions of this Paragraph 8 shall modify Lease
Paragraph 11 ("Tenant's Personal Property Insurance and Workman's Compensation Insurance"), as follows: Tenant's obligation to insure the leasehold improvements owned by Tenant within the
Leased Premises shall be limited to those leasehold improvements owned by Tenant that are not covered by real property insurance Landlord obtains pursuant to Lease Paragraph 12 ("Property Insurance")
as amended in Paragraph 5 above. 

        9.     DESTRUCTION.
The provisions of this Paragraph 9 shall modify Lease Paragraph 21 ("Destruction"), as follows: Landlord's
obligation to rebuild or restore the Premises shall be limited to the building and any interior improvements covered by the real property insurance Landlord obtains pursuant to Lease
Paragraph 12 ("Property Insurance") as amended in Paragraph 5 above: 

        10.   AUTHORITY
TO EXECUTE. The parties executing this Agreement hereby warrant and represent that they are properly authorized to execute this
Agreement and bind the parties on behalf of whom they execute this Agreement and to all of the terms, covenants and conditions of this Agreement as they relate to the respective parties hereto. 

        11.   DELETION
OF PARAGRAPHS: Insomuch as Tenant has entered into a lease agreement with Landlord for premises located at 700A East Middlefield
Road, Mountain View, California (Building A), it is agreed between the parties that Lease Paragraphs 54 ("Option to Lease Building A (700A Middlefield Rd., Mt. View, CA) Option Space"), 55 ("First
Right of Refusal") and 56 ("Rights Reserved for Tenant's Personal Benefit"), all of which relate to said Building A, are hereby deleted and shall be of no further force or effect. 

        EXCEPT
AS MODIFIED HEREIN, all other terms, covenants, and conditions of said June 16, 1992 Lease Agreement shall remain in full force and effect. 

        IN
WITNESS WHEREOF, Landlord and Tenant have executed this Amendment No. 4 to Lease as of the day and year last written below. 

	LANDLORD:

JOHN ARRILLAGA SURVIVOR'S TRUST	 	TENANT:

SYNOPSYS, INC.

a Delaware corporation
	 	 	 	 	 	 	 
	By	 	/s/  JOHN ARRILLAGA      
 John Arrillaga, Trustee	 	By	 	/s/  AART DE GEUS      
 AART DE GEUS
	Date:	 	 	 	 	 	
 Print or Type Name
	 	 	 	 	Title:	 	CHAIRMAN & CEO
	 	 	 	 	Date:	 	8/8/01
	

RICHARD T. PEERY SEPARATE PROPERTY TRUST	
 	

 	
 	

 
	 	 	 	 	 	 	 
	By	 	/s/  JASON PEERY      
 Jason Peery, Special Trustee	 	 	 	 
	Date:	 	8/8/01

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00134-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00134-of-00352.parquet"}]]