EX-10.1





 Exhibit 10.1 

STOCKHOLDER SUPPORT AGREEMENT 

STOCKHOLDER SUPPORT AGREEMENT, dated as of December 10, 2020 (this “Agreement”), by and among GigCapital3, Inc., a
Delaware corporation (“GigCapital3”), and certain of the stockholders of Lightning Systems, Inc., a Delaware corporation (the “Company”), whose names appear on the signature pages of this Agreement (each, a
“Stockholder” and, collectively, the “Stockholders”). 
 WHEREAS, GigCapital3, Project Power Merger Sub,
Inc., a Delaware corporation and wholly owned subsidiary of GigCapital3 (“Merger Sub”), and the Company have negotiated a Business Combination Agreement in the form attached hereto as Exhibit B (the
“BCA”; terms used but not defined in this Agreement shall have the meanings ascribed to them in the BCA), which provides, among other things, that, upon the terms and subject to the conditions thereof, Merger Sub will be merged with
and into the Company (the “Merger”), with the Company surviving the Merger as a wholly owned subsidiary of GigCapital3; and 

WHEREAS, as of the date hereof, each Stockholder owns of record the number of shares of Company Common Stock and Company Preferred Stock as
set forth opposite such Stockholder’s name on Exhibit A hereto (all such shares of Company Common Stock and Company Preferred Stock and any shares of Company Common Stock and Company Preferred Stock of which ownership of record
or the power to vote is hereafter acquired by the Stockholders prior to the termination of this Agreement being referred to herein as the “Shares”). 

NOW, THEREFORE, in consideration of the foregoing and of the mutual covenants and agreements contained herein, and intending to be legally
bound hereby, the parties hereto hereby agree as follows: 
 1. BCA Approved; Agreement to Vote. Each Stockholder, with respect to
such Stockholder’s Shares, severally and not jointly, hereby agrees to vote, at any meeting of the stockholders of the Company, and in any action by written consent of the stockholders of the Company (which written consent shall be delivered
promptly, and in any event within twenty four (24) hours, after the Company requests such delivery), all of the Shares held by such Stockholder at such time in favor of the approval and adoption of the BCA and approval of the Merger and all
other transactions contemplated by the BCA (including but not limited to the conversion of all Company Preferred Stock into Company Common Stock and the exercise or termination of all Company Warrants pursuant to the Stockholders Agreement, in each
case subject to and effective immediately prior to the consummation of the Merger under the BCA) provided in all cases that no changes have been made in the BCA or in the Merger or related transactions or ancillary agreements under the BCA
that are material to one or more of the Stockholders. Provided no changes are made in the BCA or in the Merger or related transactions or ancillary agreements under the BCA that are material to one or more of the Stockholders, each Stockholder,
severally and not jointly, hereby agrees to vote at any meeting of the stockholders of the Company, and to act by written consent of Company stockholders, against any action, agreement, transaction or proposal that would cause a material breach of
any covenant, representation, warranty or other obligation or agreement of the Company under the BCA or that would reasonably be expected to prevent the Merger from being consummated. Each Stockholder acknowledges receipt and review of a copy of the
BCA. 
 2. Termination of Stockholder Agreements, Related Agreements. Subject to the consummation of the Closing pursuant to the BCA
each Stockholder, severally and not jointly, hereby agrees that the following shall terminate effective immediately prior to the Closing under the BCA (provided that all Terminating Rights (as defined below) between the Company or any of its
subsidiaries and any other holder of Company capital stock shall also terminate at such time), that certain (a) Investors’ Rights Agreement, dated as of December 31, 2019, by and among the Company and the stockholders of the Company
named therein (the “Rights Agreement”), (b) Co-Sale Agreement, dated as of December 31, 2019, by and among the Company and the stockholders of the Company named therein (the
“Co-Sale Agreement”), (c) Voting Agreement dated as of December 31, 2019 by and among the Company and the stockholders of the Company named therein (the “Voting
Agreement” and, together with the Rights Agreement and the Co-Sale Agreement, the “Stockholder Agreements”) and (d) if applicable to any Stockholder, any rights under any letter
agreement providing for redemption rights, put rights, purchase rights or other similar rights not generally available to stockholders of the Company (the “Terminating Rights”) between Stockholder and the Company, but excluding, for
the avoidance of doubt, any rights such 












 
Stockholder may have that relate to any commercial or employment agreements or arrangements between such Stockholder and the Company or any subsidiary, which shall survive in accordance with
their terms. 
 3. Transfer of Shares. Each Stockholder, severally and not jointly, agrees that it shall not, directly or indirectly,
(a) sell, assign, transfer (including by operation of law), create any lien or pledge, dispose of or otherwise encumber any of the Shares or otherwise agree to do any of the foregoing, except for a sale, assignment or transfer pursuant to the
BCA or to another stockholder of the Company that is a party to this Agreement and bound by the terms and obligations hereof, (b) deposit any Shares into a voting trust or enter into a voting agreement or arrangement or grant any proxy or power
of attorney with respect thereto that is inconsistent with this Agreement or (c) enter into any contract, option or other arrangement or undertaking with respect to the direct acquisition or sale, assignment, transfer or other disposition of
any Shares, except as set forth in the Stockholders’ Agreement; provided, that the foregoing shall not prohibit the transfer of the Shares to an affiliate of Stockholder, but only if such affiliate of such Stockholder shall execute this
Agreement or a joinder agreeing to become a party to this Agreement. 
 4. No Solicitation of Transactions. Each of the Stockholders
severally and not jointly, agrees not to directly or indirectly, through any officer, director, representative, agent or otherwise, (a) solicit, initiate or knowingly encourage (including by furnishing information) the submission of, or
participate in any discussions or negotiations regarding, any transaction in violation of the BCA or (b) participate in any discussions or negotiations regarding, or furnish to any person or other entity or “group” within the meaning
of Section 13(d) of the Exchange Act, any information with the intent to, or otherwise cooperate in any way with respect to, or knowingly assist, participate in, facilitate or encourage, any unsolicited proposal that constitutes, or may
reasonably be expected to lead to, an Alternative Transaction in violation of the BCA. Each Stockholder shall, and shall direct its representatives and agents to, immediately cease and cause to be terminated any discussions or negotiations with any
parties that may be ongoing with respect to any Alternative Transaction (other than the transactions contemplated by the BCA) to the extent required by the BCA. If any Stockholder receives any inquiry or proposal with respect to an Alternative
Transaction, then such Stockholder shall promptly (and in no event later than twenty-four (24) hours after such Stockholder becomes aware of such inquiry or proposal) notify such person in writing that the Company is subject to an exclusivity
agreement with respect to the sale of the Company that prohibits such Stockholder from considering such inquiry or proposal. 
 5.
Representations and Warranties. Each Stockholder severally and not jointly, represents and warrants to GigCapital3 as follows: 
 (a)
The execution, delivery and performance by such Stockholder of this Agreement and the consummation by such Stockholder of the transactions contemplated hereby do not and will not (i) conflict with or violate any statute, law, ordinance,
regulation, rule, code, executive order, injunction, judgment, decree or other order applicable to such Stockholder, (ii) require any consent, approval or authorization of, declaration, filing or registration with, or notice to, any person or
entity, (iii) result in the creation of any encumbrance on any Shares (other than under this Agreement, the BCA and the agreements contemplated by the BCA) or (iv) if such Stockholder is an entity, conflict with or result in a breach of or
constitute a default under any provision of such Stockholder’s governing documents. 
 (b) As of the date of this Agreement, such
Stockholder owns exclusively of record and has good and valid title to the Shares set forth opposite the Stockholder’s name on Exhibit A free and clear of any security interest, lien, claim, pledge, proxy, option,
right of first refusal, agreement, voting restriction, limitation on disposition, charge, adverse claim of ownership or use or other encumbrance of any kind and has the sole power to vote and the right, power and authority to sell, transfer and
deliver such Shares, other than pursuant and subject to: (i) this Agreement, (ii) applicable securities laws, (iii) the Company’s certificate of incorporation and bylaws, (iv) the Stockholders Agreement and (v) the
Stockholder Agreements. Such Stockholder is not the registered owner of any Shares other than those set forth on Exhibit A. 

  
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 (c) Such Stockholder has the power, authority and capacity to execute, deliver and perform
this Agreement and that this Agreement has been duly authorized, executed and delivered by such Stockholder. 
 6. Termination. This
Agreement and the obligations and liabilities of the Stockholders under this Agreement shall automatically terminate upon the earliest of (a) the Effective Time; (b) the termination of the BCA in accordance with its terms, (c) the
effective date of a written agreement of the parties hereto terminating this Agreement and (d) any material breach by GigCapital3 of the BCA that is not fully cured within the time permitted by the BCA. Upon termination of this Agreement,
neither party shall have any further obligations or liabilities under this Agreement. The representations and warranties contained in this Agreement and in any certificate or other writing delivered pursuant hereto shall not survive the Closing or
the termination of this Agreement. 
 7. Miscellaneous. 

(a) Except as otherwise provided herein, all costs and expenses incurred in connection with this Agreement and the transactions contemplated
hereby shall be paid by the party incurring such costs and expenses, whether or not the transactions contemplated hereby are consummated. 

(b) All notices, requests, claims, demands and other communications hereunder shall be in writing and shall be given (and shall be deemed to
have been duly given upon receipt) by delivery in person, by e-mail or by registered or certified mail (postage prepaid, return receipt requested) to the respective parties at the following addresses or e-mail addresses (or at such other address or email address for a party as shall be specified in a notice given in accordance with this Section 7(b)): 

If to GigCapital3, to it at: 
  

			
	 GigCapital3, Inc.
 1731 Embarcadero
Rd., Suite 200
 Palo Alto, CA 94303

	Attention:	  	Dr. Avi Katz, President and Chief Executive Officer
	Email:	  	avi@gigcapitalglobal.com


 with a copy to: 

 

			
	 DLA Piper LLP (US)
 555 Mission
Street
 Suite 2400
 San Francisco, CA 94105

	Attention:	  	Jeffrey Selman; John Maselli
	Email:	  	jeffrey.selman@us.dlapiper.com; john.maselli@us.dlapiper.com


 If to a Stockholder, to the address or email address set forth for Stockholder on the signature page
hereof. 
 (c) If any term or other provision of this Agreement is invalid, illegal or incapable of being enforced by any rule of law, or
public policy, all other conditions and provisions of this Agreement shall nevertheless remain in full force and effect so long as the economic or legal substance of the transactions contemplated hereby is not affected in any manner materially
adverse to any party. Upon such determination that any term or other provision is invalid, illegal or incapable of being enforced, the parties hereto shall negotiate in good faith to modify this Agreement so as to effect the original intent of the
parties as closely as possible in a mutually acceptable manner in order that the transactions contemplated hereby be consummated as originally contemplated to the fullest extent possible. 

  
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 (d) This Agreement constitutes the entire agreement among the parties with respect to the
subject matter hereof and supersedes all prior agreements and undertakings, both written and oral, among the parties, or any of them, with respect to the subject matter hereof. This Agreement shall not be assigned (whether pursuant to a merger, by
operation of law or otherwise), by any party without the prior express written consent of the other parties hereto except as permitted by Section 3. 

(e) This Agreement shall be binding upon and inure solely to the benefit of each party hereto, and nothing in this Agreement, express or
implied, is intended to or shall confer upon any other person any right, benefit or remedy of any nature whatsoever under or by reason of this Agreement. No Stockholder shall be liable for the breach by any other Stockholder of this Agreement. 

(f) The parties hereto agree that irreparable damage would occur in the event any provision of this Agreement was not performed in accordance
with the terms hereof and that the parties shall be entitled to specific performance of the terms hereof in addition to any other remedy at law or in equity. 

(g) This Agreement shall be governed by, and construed in accordance with, the laws of the State of Delaware applicable to contracts executed
in and to be performed in that State. All Actions arising out of or relating to this Agreement shall be heard and determined exclusively in any Delaware Chancery Court. The parties hereto hereby (i) submit to the exclusive jurisdiction of the
Delaware Chancery Court for the purpose of any Action arising out of or relating to this Agreement brought by any party hereto, and (ii) irrevocably waive, and agree not to assert by way of motion, defense, or otherwise, in any such Action, any
claim that it is not subject personally to the jurisdiction of the above-named courts, that its property is exempt or immune from attachment or execution, that the Action is brought in an inconvenient forum, that the venue of the Action is improper,
or that this Agreement or the transactions contemplated hereunder may not be enforced in or by any of the above-named courts. 
 (h) This
Agreement may be executed and delivered (including by facsimile or portable document format (pdf) transmission) in counterparts, and by the different parties hereto in separate counterparts, each of which when executed shall be deemed to be an
original but all of which taken together shall constitute one and the same agreement. 
 (i) At the request of GigCapital3, in the case of
any Stockholder, or at the request of any Stockholder, in the case of GigCapital3, and without further consideration, each party shall execute and deliver or cause to be executed and delivered such additional documents and instruments and take such
further action as may be reasonably necessary to implement the provisions of this Agreement. 
 (j) This Agreement shall not be effective or
binding upon any Stockholder until after such time as the BCA is executed and delivered by the Company, GigCapital3 and Merger Sub. 
 (k)
Each of the parties hereto hereby waives to the fullest extent permitted by applicable law any right it may have to a trial by jury with respect to any litigation directly or indirectly arising out of, under or in connection with this Agreement.
Each of the parties 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 that
foregoing waiver and (ii) acknowledges that it and the other parties hereto have been induced to enter into this Agreement and the transactions contemplated hereby, as applicable, by, among other things, the mutual waivers and
certifications in this Section 7(k). 
 [Signature pages follow] 

  
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 IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first written
above. 
  

			
	GIGCAPITAL3, INC.
		
	By:	 	 /s/ Dr. Avi S. Katz

	Name: Dr. Avi S. Katz
	Title:   Chief Executive Officer


  
  
  

 
 Signature Page to Stockholder Support Agreement 












 IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first written
above. 
  

			
	BP TECHNOLOGY VENTURES INC.
		
	By:	 	 /s/ Craig Coburn

	Name: Craig Coburn
	Title:   Director


 
			
		
	Address:	 	  

		
		 	 
		
		 	 
		
	Email:	 	 


  
  
  

 
 Signature Page to Stockholder Support Agreement 












 IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first written
above. 
  

			
	ROSELLA HOLDINGS, LTD.
		
	By:	 	 /s/ Karen Higgins

	Name:	 	Karen Higgins
		
	By:	 	 /s/ Alison Wyser

	Name:	 	Alison Wyser
		
	 Title:
	 	 For Portman Welbeck Limited as Corporate

Directors for Rosella Holdings Limited

		
	Address:	 	 
		
		 	 
		
		 	 
		
	Email:	 	 


  
  
  

 
 Signature page to Stockholder Support Agreement 












 IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first written
above. 
  

			
	ARAVAIPA VENTURE FUND, LLC
		
	By:	 	 /s/ Robert Fenwick-Smith

	Name: Robert-Fenwick-Smith
	Title:   Manager of the Manager, Aravaipa Ventures


 
			
		
	Address:	 	 
		
		 	 
		
		 	 
		
	Email:	 	 


  
  
  

 
 Signature page to Stockholder Support Agreement 












 IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first written
above. 
  

			
	AC ENERGY TECHNOLOGIES LLC
		
	By:	 	 /s/ Andrew Coors

	Name: Andrew Coors
	Title:   Member


 
			
		
	Address:	 	  

		
		 	 
		
		 	 
		
	Email:	 	 


  
  
  

 
 Signature page to Stockholder Support Agreement 












 IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first written
above. 
  

			
	FRONT RANGE VENTURES LLC
		
	By:	 	 /s/ Loren J. Richards

	Name: Loren J. Richards
	Title:   Trust Officer, First Western Trust Bank


 
			
		
	Address:	 	  

		
		 	 
		
		 	 
		
	Email:	 	 


  
  
  

 
 Signature page to Stockholder Support Agreement 












 IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first written
above. 
  

			
	CUPOLA INFRASTRUCTURE INCOME FUND, LLLP
	
	By: Asset Management Group Investment Corp., General Partner
		
	By:	 	 /s/ Michael D. Bergmann

	Name: Michael D. Bergmann
	Title:   Vice President


 
			
		
	Address:	 	  

		
		 	 
		
		 	 
		
	Email:	 	 


  
  
  

Signature page to Stockholder Support Agreement 












 EXHIBIT B 

Business Combination Agreement 

[see attached]