Document:

Exhibit 10.17  

AMENDMENT NO. 2 TO LEASE  

        THIS AMENDMENT NO. 2 is made and entered into this fourth day of October, 1995, by and between  JOHN
ARRILLAGA, Trustee, or his Successor Trustee UTA dated 7/20/77 (ARRILLAGA FAMILY TRUST) as amended
(previously known as the JOHN ARRILLAGA SEPARATE PROPERTY TRUST), 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 23, 1993 Landlord leased to Tenant all of that certain
104,170+/-square foot building located at 700A East Middlefield Road, Mountain View, California, the details of which are more particularly set forth in
said June 23, 1993 Lease Agreement (the "Lease"), and 

        B.    WHEREAS, said Lease was amended by Amendment No. 1 dated November 4, 1994 which: (i) acknowledged
Tenant's exercise of its option to delay occupancy of the first floor of the Premises and established February 1, 1995 as the Commencement Date for the second floor of the Premises;
(ii) decreased the Term of the Lease to eight (8) years five (5) months, or from October 1, 1994 through February 28, 2003, pursuant to Lease Paragraph 51
("Commencement Date, Lease Term and Basic Rent Schedule Amended in the Event Tenant Delays Occupancy on the First and/or Second Floor of the Leased
Premises"); and (iii) amended the Basic Rent schedule and the Aggregate Rent of said Lease Agreement accordingly, and 

        C.    WHEREAS, it is now the desire of the parties hereto to amend the Lease by: (i) amending Lease Paragraphs 49
("Cross Default") and 50 ("Lease Terms Co-Terminous"), to include reference to Tenant's
other lease agreements with Landlord dated August 17, 1990, June 16, 1992, and August 24, 1995 for premises respectively located at 700C and 700B East Middlefield Road, Mountain
View, California and 1101 West Maude Avenue, Sunnyvale, California; (ii) amending 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 a recent audit of said
Lease which requires the deletion of the reference to the last four (4) years of the Lease Term as a factor in calculating Tenant's cash contribution towards the cost of said capital
improvements; and (iii) establishing Tenant's temporary driveway rights to adjacent property leased by Tenant at 1101 West Maude Avenue, Mountain View, California; and (iv) replacing  Exhibit A to said Lease 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.    AMENDMENT TO LEASE PARAGRAPH 50 ("LEASE TERMS
CO-TERMINOUS"):    The aforementioned Paragraph are hereby amended by the parties hereto to include the following: 

"It
is understood that Landlord and Tenant have three other leases dated August 17, 1990, June 16, 1992, and August 24, 1995 for premises respectively located at 700C and 700B
East Middlefield Road, Mountain View, California and 1101 West Maude Avenue, Sunnyvale, California ("Other Leases"). It is acknowledged that it is the
intention of the parties that the Term of this Lease be co-terminus with the term of the Other Leases such that the terms of 

1

 

all
four leases expire on the same date; provided, however, the termination of this Lease resulting from the terms and conditions stated under Paragraph 19 "Bankruptcy
and Default" (subject to Landlord's option as stated in the respective leases' "Cross Default" Paragraph) or Paragraph 21
"Dostruction" or Paragraph 22 "Eminent Domain" shall not result in a termination of the Existing
Leases." 

        2.    CROSS DEFAULT:    As a material part of the consideration for
the execution of this Lease by Landlord, it is agreed between Landlord and Tenant that a default under this Lease which remains uncured after passage of the applicable notice and cure periods, or a
default which remains after passage of the applicable notice and cure periods under said Other Leases may, at the option of Landlord, be considered a default under all four leases, in which event
Landlord shall be entitled (but in no event required) to apply all rights and remedies of Landlord under the terms of one lease to all
four leases including, but not limited to, the right to terminate any or all of said leases by reason of a default under said Other Leases or hereunder. 

        3.    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:    It is agreed between the parties hereto that due to an oversight by Landlord, the reference in
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 the period remaining in the last four (4) years of the Lease Term was incorrectly stated in the executed copy of said Lease and said
Paragraph 52.B. is hereby being deleted in its entirety and replaced with the following paragraph which represents the intent of the parties at the time said Lease was executed. 

"52.B.
When Landlord makes an improvement pursuant to Paragraph 52A, and as a condition to Landlord's obligation to construct such improvement, Tenant shall make the following contribution in
cash to Landlord for the cost thereof prior to the commencement of the work by Landlord. It is agreed that Tenant shall pay to Landlord 100% of the cost of the first $100,000.00 worth of each
improvement. After the first $100,000,00, all costs above $100,000.00 shall be divided by 15 and multiplied by the number of years remaining in the Lease Term from the date work on such improvement
commences. 

For
example, if the cost of such improvement was $400,000.00 and there was one year and six months remaining in the Lease Term when the work commenced, then Tenant would be responsible for reimbursing
Landlord in cash $130,000.00 computed as follows: 

	 	Total Cost of Work:	 	$	400,000.00	 
	 	Tenant Responsible for first $100,000:	 	$	100,000.00	 
	 	 	
	 
	 	Total Amount to be Amortized:	 	$	300,000.00	 
	 	 	
	 
	

$300,000.00 / 15 = $20,000.00/yr. × 1.5 yrs. =	
 	
$	

30,000.00	
 
	Tenant responsible for $100,000.00 + $30,000.00 =	 	$	130,000.00	"

        4.    TEMPORARY DRIVEWAY RIGHTS:    It is understood that:
(i) Landlord and Tenant have previously entered into three other leases dated August 17, 1990, June 23, 1993, and August 24, 1995 for premises contiguous to the Premises
leased hereunder respectively located at 700C and 700A East Middlefield Road, Mountain View, California and 1101 West Maude Avenue, Sunnyvale, California ("Adjacent
Premises"); and (ii) along the southeast aide of the Premises there exists two driveways in the approximate location as shown in Yellow on  Exhibit A, attached
hereto which allow access between the Premises leased hereunder and the Adjacent Premises.
 

2

 

        It
is agreed between the parties hereto that Tenant shall have the temporary right to use said driveways for access between the Leased Premises and the Adjacent Premises only for so long
as Tenant leases and occupies: (i) all three buildings of the Adjacent Premises, and (ii) the Premises leased hereunder. In the event any or all of the Tenant's aforementioned leases for
the Adjacent Premises or this Lease should terminate, for any reason whatsoever, Tenant (nor any of its subtenants, assignees, etc.) shall have no further right to use said Driveways in which case
Landlord may, in its sole and absolute discretion, erect a physical barrier, which may include, but is not limited to, curbs, planters, and or landscaping. 

        5.    EXHIBIT A TO LEASE REPLACED:    Pursuant to the initialed statement on Lease  Exhibit A regarding Tenant's temporary
right to use the access road outlined in Yellow on said  Exhibit A, it is hereby acknowledged that Tenant's temporary right to use said access road is hereby rescinded. Furthermore, it is understood
by
Tenant that the Parcel has been modified to the existing configuration shown in Green on Exhibit A attached hereto and that said  Exhibit A to
this Amendment No. 2 shall replace Exhibit A to the Lease.
 

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

3

 

        IN WITNESS WHEREOF, Landlord and Tenant have executed this Amendment No. 2 to Leases as of the day and year last written below. 

	LANDLORD:	 	TENANT:
	
JOHN ARRILLAGA FAMILY TRUST	
 	

SYNOPSYS, INC.

A Delaware corporation;
	

By:	
 	

/s/ John Arrillaga
 John Arrillaga, Trustee	
 	

By:	
 	

/s/ Sally De Stefano

	

Dated:	
 	

          
	
 	

                Sally De Stefano
 Print or Type Name
	
RICHARD T. PEERY SEPARATE

PROPERTY TRUST	
 	

Title:	
 	

          

	 	 	 	 	Dated:	 	          

	

By:	
 	

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

 	
 	

 
	

Dated:	
 	

          
	
 	

 	
 	

 

4

 

  

5Exhibit 10.18  

AMENDMENT NO. 1

TO LEASE  

        THIS AMENDMENT NO. 1 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") 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 24, 1995 Landlord leased to Tenant all of that certain 85,000+/- square foot building located at 1101 West Maude
Avenue, Mountain View, California, the details of which are more particularly set forth in said August 24, 1995 Lease Agreement, and 

        B.    WHEREAS,
it is now the desire of the parties hereto to amend the Lease by: (i) extending the Term for twelve 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, (vii) replacing Lease Paragraphs 12 ("Property Insurance") and 31 ("Notices"), (viii) 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 21 ("Destruction"),
(xi) adding a paragraph ("Authority to Execute"), and (x) deleting Lease Paragraphs 53 ("Two (2)—Three (3) Year Options to Extend") and 54 ("Tenant's Option to Terminate
Lease") 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 (the "Extended Term"), and the Lease Termination Date shall be changed from February 28, 2003 to February 28, 2015. The Extended Term of the Lease is comprised of
the two three year extensions (which extend the Term to February 28, 2009) covered under Tenant's Option to Extend pursuant to Lease Paragraph 53 ("Two Three Year Options to Extend") and
an additional six year extension, which extends the Term to February 28, 2015 to make the Termination Date of this Lease co-terminous with the extended term of the Existing Leases
as referenced in Lease Paragraph 47 ("Lease Terms Co-Terminous"). Tenant and Landlord hereby acknowledge Tenant's exercise of said Options to Extend the Terms of said Lease, and
Lease Paragraph 53 is hereby deleted in its entirety upon the execution of this Amendment No. 1. 

        2.     BASIC
RENTAL FOR EXTENDED TERM OF LEASE: The monthly Basic Rental for the Extended Term of Lease shall be as follows: 

        On
March 1, 2003, the sum of ONE HUNDRED FORTY THOUSAND TWO HUNDRED FIFTY AND NO/100 DOLLARS ($140,250.00) 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 ONE HUNDRED FORTY FOUR THOUSAND FIVE HUNDRED AND NO/100 DOLLARS ($144,500.00) 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 ONE HUNDRED FORTY EIGHT THOUSAND SEVEN HUNDRED FIFTY AND NO/100 DOLLARS ($148,750.00) 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 ONE HUNDRED FIFTY THREE THOUSAND AND NO/100 DOLLARS ($153,000.00) shall be due, and a like sum due on the first day of each month thereafter through
and including February 1, 2007. 

        On
March 1, 2007, the sum of ONE HUNDRED FIFTY SEVEN THOUSAND TWO HUNDRED FIFTY AND NO/100 DOLLARS ($157,250.00) shall be due, and a like sum due on the first day of each month
thereafter through and including February 1, 2008. 

        On
March 1, 2008, the sum of ONE HUNDRED SIXTY ONE THOUSAND FIVE HUNDRED AND NO/100 DOLLARS ($161,500.00) 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 SIXTEEN THOUSAND EIGHT HUNDRED SIXTY TWO AND 67/100 DOLLARS ($216,862.67) 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 TWENTY TWO THOUSAND TWO HUNDRED EIGHTY FOUR AND 24/100 ($222,284.24) shall be due, and a like sum due on the first day of each month
thereafter, through and including February l, 2011. 

        On
March 1, 2011, the sum of TWO HUNDRED TWENTY SEVEN THOUSAND EIGHT HUNDRED FORTY ONE AND 34/100 DOLLARS ($227,841.34) 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 THIRTY THREE THOUSAND FIVE HUNDRED THIRTY SEVEN AND 38/100 DOLLARS ($233,537.38) 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 THIRTY NINE THOUSAND THREE HUNDRED SEVENTY FIVE AND 81/100 DOLLARS ($239,375.81) 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 TWO HUNDRED FORTY FIVE THOUSAND THREE HUNDRED SIXTY AND 21/100 DOLLARS ($245,360.21) shall be due, and a like sum due on the first day of each month
thereafter, through and including February 1, 2015. 

        The
Aggregate Basic Rent for the Lease Term, as extended, shall be increased by $27,486,139.80 or from $10,633,500.00 to $38,119,639.80. 

        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 $280,500.00. In the event of a Tenant default, Tenant's Security Deposit shall be increased by $210,220.42, or from $280,500.00 to $490,720.42 as follows: 

        A.    By
February 28, 2003 (or within ten (10) days of notice from Landlord of an uncured default under the Lease if said default occurs after February 28,
2003), Tenant shall: (i) provide Landlord with an amended Standby Letter of Credit, in compliance with the terms of Lease Paragraph 44 ("Security Deposit Represented by Standby Letter of
Credit") in the total amount of $297,500.00, which amount is the Security Deposit required under Tenant's First Three Year Option to Extend as stated in Lease Paragraph 53.A; or
(ii) deposit cash in the amount of $17,000.00. 

        B.    By
February 28, 2006 (or within ten (10) days of notice from Landlord of an uncured default under the Lease if said default occurs after February 28,
2006), Tenant shall: (i) provide Landlord with an amended Standby Letter of Credit, in compliance with the terms of Lease 

Paragraph
44 ("Security Deposit Represented by Standby Letter of Credit") in the total amount of $323,000.00, which amount is the Security Deposit required under Tenant's Second Three Year Option to
Extend as stated in Lease Paragraph 53.B; or (ii) deposit cash in the amount of $25,500.00. 

        C.    By
February 28, 2009 (or within ten (10) days of notice from Landlord of an uncured default under the Lease if said default occurs after February 28,
2006), Tenant shall: (i) provide Landlord with an amended Standby Letter of Credit, in compliance with the terms of Lease Paragraph 44 ("Security Deposit Represented by Standby Letter of
Credit") in the total amount of $490,720.42, which amount is the total Security Deposit required under the Lease; or (ii) deposit cash in the amount of $167,720.42. 

        Within
ten (10) business days of Tenant's execution of this Amendment No. 1, 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, 2009, 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 maybe 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 of 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.   TENANT'S
OPTION TO TERMINATE LEASE: Lease Paragraph 54 ("Tenant's Option to Terminate Lease") is hereby deleted in its entirety, and
shall be of no further force or effect. 

        EXCEPT
AS MODIFIED HEREIN, all other terms, covenants, and conditions of said August 24, 1995 Lease Agreement 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 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:	8/8/01	 	 	
 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

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