Document:

EX-10.7.5

 Exhibit 10.7.5 

FOURTH AMENDMENT TO COMMERCIAL LEASE 

This Fourth Amendment to Commercial Lease (“Fourth Amendment”) is made and entered into this 16 day of October, 2014, by and
between GL DALLAS HOLDINGS, L.P. (“Lessor”) and XTERA COMMUNICATIONS. INC. (“Lessee”). 

RECITALS: 
 A. Lessor and Lessee
are parties to that certain Commercial Lease dated May 15, 2000 (as modified by that certain First Amendment to Commercial Lease dated January 1, 2001, Second Amendment to Commercial Lease dated June 25, 2003 and Third Amendment to
Commercial Lease dated October 26, 2007, the “Lease”); and 
 B. Lessor and Lessee desire to amend the Lease as
expressly set forth in this Fourth Amendment. 
 NOW, THEREFORE, for good and valuable consideration, the receipt and legal sufficiency of
which are hereby acknowledged, Lessor and Lessee hereby agree as follows: 
 1. Recitals. The Recitals are incorporated into this
Fourth Amendment by this reference. 
 2. Definitions. Each capitalized term used in this Fourth Amendment shall have the same
meaning as is ascribed to such capitalized term in the Lease, unless otherwise provided for herein. 
 3. Extension of Lease Term.
The Lease is hereby amended such that the Term is extended for a period of eighty-eight (88) months (the “Extended Term”) to begin on February 1, 2015 and to expire at 11:59 p.m. local Allen, Texas time on May 31,
2022 (the “New Expiration Date”) unless sooner terminated or extended by written agreement of the parties. The term “Term” shall include the Extended Term. Lessee agrees that it currently occupies the Leased
Premises, and accepts the Leased Premises for the Extended Term, in its “AS-IS, WHERE-IS, WITH ALL FAULTS” condition as of the first day of the Extended Term. Lessor has no obligations to make or pay for any modifications,
alterations or improvements to the Leased Premises except as expressly set forth in Exhibit “A” attached hereto and incorporated herein by this reference (the “Work Letter”), and any permitted improvements to
the Leased Premises shall be at Lessee’s sole cost. 
 4. Base Rent. Lessor and Lessee agree that Base Rent for the Extended
Term shall be as follows: 
  

													
	 Months
	  	Rate	 	  	Monthly	 	  	Annually	 
	 2/1/15-5/31/16
	  	$	11.75 prsf	  	  	$	37,970.13	  	  	$	455,641.50	* 
	 6/1/16-5/31/18
	  	$	12.00 prsf	  	  	$	38,778.00	  	  	$	465,336.00	  
	 6/1/18-5/31/20
	  	$	12.50 prsf	  	  	$	40,393.75	  	  	$	484,725.00	  
	 6/1/20-5/31/22
	  	$	13.00 prsf	  	  	$	42,009.50	  	  	$	504,114.00	  

 * Notwithstanding the foregoing, monthly installment payments of Base Rent otherwise due during the period beginning on
February 1, 2015 and ending on May 31, 2015 shall be conditionally abated. Commencing on June 1, 2015, Lessee shall make monthly installment payments of Base Rent based on the Base Rent schedule shown above. Notwithstanding such
abatement of Base Rent, (a) all other sums due under the Lease, including all Additional Rent, shall be payable as provided in the Lease, and (b) any increases in Base Rent set forth in the Lease shall occur on the dates scheduled
therefor. Abatement of Base Rent is conditioned upon Lessee’s full and timely performance of its obligations under the Lease. If Lessee defaults under or breaches any of the provisions of the Lease, then abatement of Base Rent shall immediately
become void, and Lessee shall promptly pay to Lessor, in addition to all other amounts due to Lessor under the Lease, the full amount of all Base Rent herein abated. 

  
 FOURTH
AMENDMENT TO COMMERCIAL LEASE – PAGE 1 

 5. Additional Rent. Lessee shall pay Additional Rent, including, without limitation, all
Operating Expenses, in accordance with the terms and conditions of Lease. 
 6. Renewal Option. Paragraph 16.01 of the Lease shall be
amended to provide one (1) five (5) year option to renew the Term at the then market rate, with no less than nine (9) months’ prior written notice to Lessor. 

7. Lessee Improvements. Lessor shall provide Lessee with an allowance for improvements to the Leased Premises in accordance with the
Work Letter attached hereto as Exhibit “A”. 
 8. Ratification. Lessee warrants that, as of the date hereof,
the Lease is valid and presently in full force and effect, Lessor has performed all of its obligations under the Lease, Lessor is not in default under the Lease, and Lessee has no claims, counterclaims, set-offs or defenses against Lessor arising
out of the Lease or relating thereto. The Lease, as hereby amended, shall continue in full force and effect and is in all respects ratified and confirmed hereby. 

9. Conflict. In the event of any conflict between the terms of the Lease and the terms of this Fourth Amendment, the terms of this
Fourth Amendment shall control. 
 10. Anti-Terrorism Representation. Neither Lessee nor any of its affiliates or constituents nor,
to the best of Lessee’s knowledge, any brokers or other agents of same, have engaged in any dealings or transactions, directly or indirectly, (i) in contravention of any U.S., international or other money laundering regulations or
conventions, including, without limitation, the United States Bank Secrecy Act, the United States Money Laundering Control Act of 1986, the United States International Money Laundering Abatement and Anti-Terrorist Financing Act of 2001, Trading with
the Enemy Act (50 U.S.C. §1 et seq., as amended), or any foreign asset control regulations of the United States Treasury Department (31 CFR, Subtitle B, Chapter V, as amended) or any enabling legislation or executive order relating thereto, or
(ii) in contravention of Executive Order No. 13224 dated September 24, 2001 issued by the President of the United States (Executive Order Blocking Property and Prohibiting Transactions with Persons Who Commit, Threaten to Commit, or
Support Terrorism), as may be amended or supplemented from time to time (“Anti-Terrorism Order”) or on behalf of terrorists or terrorist organizations, including those persons or entities that are included on any relevant lists
maintained by the United Nations, North Atlantic Treaty Organization, Organization of Economic Cooperation and Development, Financial Action Task Force, U.S. Office of Foreign Assets Control, U.S. Securities & Exchange Commission, U.S.
Federal Bureau of Investigation, U.S. Central Intelligence Agency, U.S. Internal Revenue Service, or any country or organization, all as may be amended from time to time. Neither Lessee nor any of its affiliates or constituents nor, to the best of
Lessee’s knowledge, any brokers or other agents of same, (i) are or will be conducting any business or engaging in any transaction with any person appearing on the U.S. Treasury Department’s Office of Foreign Assets Control list of
restrictions and prohibited persons, or (ii) are a person described in section 1 of the Anti-Terrorism Order, and to the best of Lessee’s knowledge neither Lessee nor any of its affiliates have engaged in any dealings or transactions, or
otherwise been associated with any such person. If at any time this representation becomes false then it shall be considered a default under the Lease, as amended, and Lessor shall have the right to exercise all of the remedies set forth in the
Lease, as amended, in the event of a default or to terminate the Lease, as amended, immediately. 
 11. Governing Law. This Fourth
Amendment shall be governed by and construed in accordance with laws of the State of Texas. 
 12. Entire Agreement. This Fourth
Amendment contains the entire agreement between the parties hereto with respect to the subject matter hereof and supersedes all prior correspondence, negotiations, and agreements, whether oral or written, between the parties concerning the subject
matter. There are no contemporaneous oral agreements, and there are no representations or warranties between the parties not contained in this Fourth Amendment. This Fourth Amendment may not be altered, amended, changed, terminated or modified in
any respect or particular, unless the same shall be in writing and signed by the party to be charged and unless such amendment has been approved in writing by Lessor. 

  
 FOURTH
AMENDMENT TO COMMERCIAL LEASE – PAGE 2 

 13. Counterpart Execution. This Fourth Amendment may be executed in multiple counterparts,
each of which shall be fully effective as an original, which together shall constitute only one (1) instrument. 
 [Remainder of page
is intentionally left blank; Signatures are on the following page] 

  
 FOURTH
AMENDMENT TO COMMERCIAL LEASE – PAGE 3 

 IN WITNESS WHEREOF, this Fourth Amendment is executed as of the day and year aforesaid. 

 

									
	 LESSOR:
  

GL DALLAS HOLDINGS, L.P.
 a Texas limited partnership
	 		 	 LESSEE:
  

XTERA COMMUNICATIONS, INC.,
 a Delaware corporation

					
	By:	 	/s/ S. Susan Self	 		 	By:	 	/s/ Jon R. Hopper
		 	S. Susan Self, Vice President	 		 	Name: Jon R. Hopper
		 		 		 	Title: CEO

  
 FOURTH
AMENDMENT TO COMMERCIAL LEASE – PAGE 4 

 Exhibit “A” 

I. Lessee Allowance 
 Definition of Allowance 

Lessor shall pay to Lessee a maximum finish out allowance equivalent to $310,224.00 dollars ($8.00) per square foot of the area of the Demised Premises of
which $174,501.00 ($4.50) per square foot to be designated for HVAC repairs and/or replacements servicing the premises, on the following terms and conditions: 
  

	 	A.)	Should the actual area of the Demised Premises differ from that referred to in Article 1.1 (g) of this Lease above, the total allowance above shall be adjusted accordingly, and the adjusted sum shall be substituted
above. 

  

	 	B.)	The finish out allowance is for improvements to the Demised Premises, and their upgrading, and shall not include personal property, inventory, signage or fixtures or fittings, other than plumbing or electrical fittings,
IT infrastructure, audio visual equipment, and HVAC equipment. Notwithstanding anything stated herein above in Paragraph B, IT infrastructure, audio visual equipment shall remain in Premises upon Termination of Lease and shall become property of
Lessor. 

  

	 	C.)	Ritter Management, Inc., as Lessor’s agent, shall monitor the requirements of this Exhibit A at no cost to Lessee. 

  

	 	D.)	Lessee’s right to apply for Lessee Allowance shall expire 12 months from lease execution. 

 II.
Approval of Lessee’s Contractor. 
 Lessee shall hire a general contractor (“Contractor”) experienced in commercial construction and
Lessor shall have the right to approve Contractor, which approval shall not be unreasonably withheld by Lessor. In that regard, Lessee shall submit to Lessor in writing the name, address and telephone number of Contractor, as well as the names of
all individuals associated with Contractor to participate in the project to improve the Demised Premises. Any objection, which Lessor may have to Contractor, shall be delivered by Lessor to Lessee in writing within five (5) business days of
Lessor’s receipt of Lessee’s notice identifying Contractor, and if any objection by Lessor is not delivered to Lessee, Contractor shall be deemed to have been approved by Lessor. 

III. Requirements of Lessee prior to commencement of construction 

Prior to commencement of construction Lessee shall deliver to Lessor the following: 
  

	 	A.)	Lessee’s Insurance certificate as described in the Lease. 

  

	 	B.)	Lessee’s Contractor’s Insurance Certificate 

  

	 	1)	Comprehensive General Liability not to be less than one million ($1,000,000.00) 

  

	 	2)	Comprehensive Automotive Liability not to be less than one million ($ 1,000,000.00) 

  

	 	3)	Workers Compensation: Statutory 

  

	 	4)	Certificate to name Owner as “Additionally Insured” 

  

	 	C.)	Construction Contract 

  

	 	D.)	Building Permit 

  
 FOURTH
AMENDMENT TO COMMERCIAL LEASE – PAGE 5 

	 	E.)	List of Subcontractors 

  

	 	F.)	Plans 

  

	 	1)	Dimensioned floor plan showing all existing base building items, (exterior walls, storefront, columns, etc...), all existing interior construction, (including indication of items to be demolished), all proposed
walls, doors, glass, cabinets, plumbing fixtures and electrical receptacles and fixtures, (including location of electrical panel). 

  

	 	2)	Reflected ceiling plan showing: ceiling heights; ceiling materials; grid patterns; ceiling mounted lighting, (including switch locations), exit signs, and any other ceiling design features. 

 

	 	3)	Finish schedule describing finish materials for all floors, walls, and ceilings, 

  

	 	4)	Other elevations, plans, details, specifications as may be required for clarification, 

  

	 	5)	The plans and specifications shall be subject to the approval of the Lessor, and shall be deemed to be granted unless any objections shall be raised by Lessor in writing delivered to Lessee within seven (7) days of
its receipt of said documents. Should Lessor and Lessee be unable to agree upon said plans and specifications within fourteen (14) days of their submission to Lessor, this Lease may be terminated by written notice from Lessor.

 IV. Requirements of Lessee during Construction 
  

	 	A.)	Building Codes: Lessee, Lessee’s contractor, and all subcontractors’ shall be responsible to comply with all national, state, and local fire, health, and environmental and building codes and obtain all
necessary permits and licenses. 

  

	 	B.)	Materials: Save as may be specifically consented to in advance by Lessor in writing, only new materials may be utilized for finish out and the use of used or second hand material or materials not in compliance with IAQ
laws is specifically prohibited. 

  

	 	C.)	Protection of Existing Structure: Existing foundations, columns, roof structure, roof deck, or existing exterior walls shall not be cut, altered, or removed without written permission of Lessor. 

 

	 	D.)	Construction Debris: Lessee and Lessee’s contractor are responsible for the removal of all debris associated with Lessee’s construction to a legal off-site landfill. Debris shall not be allowed to collect on
any common areas of the property (sidewalks, corridors, stairways, parking lots, or landscape areas). Debris shall not be placed in dumpsters provided by the Lessor. 

 

	 	E.)	Parking: Construction parking and deliveries shall be in the rear of the building to the extent possible. Lessee and Lessee’s contractor are responsible for enforcing a construction vehicle policy that keeps
disruption to neighboring Lessees to a minimum. 

  

	 	F.)	Noise: Although it is recognized that construction activity produces certain noise, Lessee and Lessee’s contractor are responsible for enforcing a policy that keeps disruption to neighboring Lessees to a minimum.
This also concerns some reasonable accommodation for a neighboring Lessee’s hours of operation, (e.g., avoiding loud noises during a neighboring restaurants peak hours). 

 

	 	G.)	Alcohol / Drugs: Lessee and Lessee’s contractor are responsible for enforcing a policy that prohibits any use of alcohol or other controlled substances on the jobsite. 

 

	 	H.)	Temporary Utilities: Lessee or Lessee’s contractor are responsible for arranging temporary utilities to the jobsite. 

  
 FOURTH
AMENDMENT TO COMMERCIAL LEASE – PAGE 6 

	 	I.)	Temporary Facilities: Lessee or Lessee’s contractor are responsible for arranging temporary facilities, such as drinking water and restrooms, at the jobsite. 

 

	 	J.)	Temporary Enclosure: Lessee or Lessee’s contractor are responsible for constructing temporary enclosures at any demolished perimeter wall to secure against unauthorized entry. 

 

	 	K.)	Jobsite Safety: Lessee and Lessee’s contractor are responsible for maintaining a safe working environment with specific attention to requirements of O.S.H.A., city fire regulation, and free travel in/around the
construction area. 

 V. Requirements of Lessee prior to move-in (Not applicable) 

Prior to Lessee’s occupancy of the demised premises, Lessee shall deliver to Lessor the following: 

 

	 	A.)	Certificate of Occupancy issued by the Municipal Authority 

  

	 	B.)	Lessor’s Certificate of Acceptance signed by Lessee 

 VI. Requirements of Lessee prior to funding of
Allowance 
 Prior to Lessor’s payment of Allowance, Lessee shall deliver to Lessor the following: 

 

	 	A.)	Copy of General Contractor’s and Sub-Contractor’s Invoice(s) 

  

	 	B.)	General Contractor’s and Sub-Contractor’s waivers and release of lien 

  

	 	C.)	An invoice on Lessee’s letterhead requesting the Lessee Allowance 

 VII. Payment of Allowance 

Subject to Lessor’s approval and acceptance of Lessee work, and upon receipt of documentation described in the above paragraphs, Lessor shall pay Lessee
finish Allowance within 30 days. 

  
 FOURTH
AMENDMENT TO COMMERCIAL LEASE – PAGE 7EX-10.8

 Exhibit 10.8 
  

 
 500 W. Bethany Drive 

Allen, TX 75013 
 January 29th, 2004

 Mr. Jon Hopper 
 151 Secretariat 

Austin, TX 78737 
 Dear Jon: 

We are pleased to offer you a position with Xtera Communications, Inc. (the “Company”) as its President and Chief Executive Officer
(“CEO”), commencing as soon as possible, but no later than February 9, 2004. As CEO, you will be an executive officer and employee of the Company, will perform such duties consistent with such position as designated by the Board of
Directors and will report to the Board of Directors. It is expected that you would devote substantially all of your time to this position. You will be elected to the Board of Directors at the first Board meeting following commencement of your
employment. The Xtera Board is enthusiastic about the leadership role you can provide as the Company’s CEO. 
 You will receive a
semi-monthly salary of $10,416.67, less all required withholding, which will be paid in accordance with Xtera’s normal payroll procedures. You will be eligible for a target bonus equal to fifty percent (50%) of your base salary for
achieving corporate objectives with a potential to increase the bonus amount to up to one hundred percent (100%) of your base salary by exceeding corporate objectives. Objectives will be established by the Board of Directors and will be focused
on meeting corporate sales and profitability targets. 
 We will recommend to the Board that, at the first Board meeting following the final
close of the Series A-1 financing, (which will be no longer than 45 days after you commence employment), you be granted a stock option (the “Initial Option”) entitling you to purchase
2,300,000 shares of the Company’s common stock (representing approximately 5.0% of the number of shares of common stock outstanding, assuming conversion of all outstanding shares of preferred stock into common stock and the exercise of all
outstanding warrants and stock options which number will be 46.3 million shares upon the final close of the Series A-1 financing) at the then current fair market value as determined by the Board at
that meeting. 
 We agree to take all actions (including seeking Board and stockholder approval) which may be necessary to increase the
number of shares reserved for issuance under the Company’s stock plan if necessary to permit the grant of your options or to grant all or part of your options independent of the option plan in a manner acceptable to you. Your options shall be
“incentive stock options” to the maximum extent permitted by the option plan (and applicable tax laws) and a “nonstatutory stock option” as to the remaining shares. Such options shall be subject to the terms and conditions of the
Company’s stock option plan and standard form of stock option agreement. Your options will be subject to the Company’s standard vesting schedule with 25% of your optioned stock vesting on the first anniversary of the vesting commencement
date and 1/48th of the remaining optioned stock vesting at the end of each monthly period thereafter, so that, assuming your continued employment, your option may be fully vested four years after
grant. 

  
 1 

 The Company’s Board of Directors intends to implement (with your consent) a program that
provides for compensation payments to you and other key employees upon a change in control. The total amount payable to you under this program will be 5.0% of the aggregate value over $30 million to be received by all of the Company’s
stockholders upon the closing of the change in control. Payment shall be paid upon the closing of the change in control in cash, securities or such other type of consideration as is received by the holders of the Company’s most senior series of
preferred stock. 
 As a Company employee, you will also receive standard health benefits and employee benefits. You should note that Xtera
may modify salaries and benefits from time to time as it deems necessary. You should be aware that your employment with the Company is for no specified period and constitutes at-will employment. As a result, you are free to resign at any time, for
any reason or for no reason. Similarly, the Company is free to conclude its employment relationship with you at any time, with or without cause, and with or without notice. 

For purposes of federal immigration law, you will be required to provide to the Company documentary evidence of your identity and eligibility
for employment in the United States. Such documentation must be provided to us within three (3) business days of your date of hire, or our employment relationship with you may be terminated. 

You agree that, during your employment with the Company, you will not engage in any other employment, occupation, consulting or other business
activity directly related to the business in which the Company is now involved or becomes involved during the term of your employment, nor will you engage in any other activities that conflict with your obligations to the Company. 

As a Company employee, you will be expected to abide by company rules and regulations. You will also be expected to sign and comply with an
Employment, Confidential Information and Invention Assignment Agreement in the Company’s standard form which requires, among other provisions, the assignment of patent rights to any invention made during your employment at the Company and
non-disclosure of proprietary information. 
 In the event of any dispute or claim relating to or arising out of our employment
relationship, you and the Company agree that all such disputes shall be fully and finally resolved by binding arbitration conducted by the American Arbitration Association in Dallas, Texas. 

To indicate your acceptance of the Company’s offer, please sign and date this letter in the space provided below and return it to me. A
duplicate original is enclosed for your records. This letter, along with the agreement relating to proprietary rights between you and the Company, set forth the terms of your employment with the Company and supersede any prior representations or
agreements, whether written or oral. This letter may not be modified or amended except by a written agreement, signed by an officer of the Company and by you. 

This offer will remain open until February 9th, 2004 at which time it will terminate
unless previously accepted by you. Upon your acceptance of the terms of this letter, you agree that we may publicly announce your agreement to join the Company on or after the date of your acceptance. 

  
 2 

 We look forward to working with you at Xtera Communications, Inc. 

 

			
	 Sincerely,
  

XTERA COMMUNICATIONS, Inc.

		
	By:	 	/s/ Jon W. Bayless
		 	Jon W. Bayless
		 	Chairman of The Board

  

	
	 ACCEPTED AND AGREED TO this
 16th day of January
2004.

	
	/s/ Jon Hopper

  
 3

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