Document:

EX-10.9

 Exhibit 10.9 

GigCapital, Inc. 
 4 Palo
Alto Square, Suite 232 
 3000 El Camino Real 

Palo Alto, CA 94306 

December         , 2017 

[NAME AND 
 ADDRESS] 

RE: Grant of Insider Shares 
 Dear
                    : 
 We are
pleased that you (“you” or “Director”) have agreed to serve on the Board of Directors (the “Board”) of GigCapital, Inc., a Delaware corporation (the
“Company”). In exchange for your services as a member of the Board, you are hereby granted 20,000 shares (the “Insider Shares”) of the common stock, par value $0.0001 per share (“Common
Stock”), of the Company, pursuant to the terms of this agreement (this “Agreement”), as follows: 

1. Grant of Insider Shares. Solely in consideration for your services as a member of the Board, the Company hereby grants the
Insider Shares to you. The Company will deliver to you a certificate registered in your name representing the Insider Shares. 

2. Representations, Warranties and Agreements. 

2.1. Director’s Representations, Warranties and Agreements. To induce the Company to issue the Insider Shares to Director,
Director hereby represents and warrants to the Company and agrees with the Company as follows: 
 2.1.1. No Government
Recommendation or Approval. Director understands that no federal or state agency has passed upon or made any recommendation or endorsement of the offering of the Insider Shares. 

2.1.2. No Conflicts. The execution, delivery and performance of this Agreement and the consummation by Director of the
transactions contemplated hereby do not violate, conflict with or constitute a default under (i) any agreement, indenture or instrument to which Director is a party, (ii) any law, statute, rule or regulation to which the Director is
subject, or (iii) any agreement, order, judgment or decree to which Director is subject. 
 2.1.3. Organization and
Authority. Director possesses all requisite power and authority necessary to carry out the transactions contemplated by this Agreement. Upon execution and delivery by Director, this Agreement will be a legal, valid and binding agreement of
Director, enforceable against Director in accordance with its terms, except as such enforceability may be limited by applicable bankruptcy, insolvency, fraudulent conveyance or similar laws affecting the enforcement of creditors’ rights
generally and subject to general principles of equity (regardless of whether enforcement is sought in a proceeding at law or in equity). 

2.1.4. Experience, Financial Capability and Suitability. Director is: (i) sophisticated in financial matters and is able to
evaluate the risks and benefits of the acquisition of the Insider Shares and (ii) able to bear the economic risk of such acquisition of the Insider Shares for an indefinite period of time because the Insider Shares have not been registered
under the Securities Act of 1933, as amended (the “Securities Act”) and therefore cannot be resold unless subsequently registered under the Securities Act or an exemption from such registration is available. Director is capable of
evaluating the merits and risks of such acquisition of the Insider Shares and has the capacity to protect his own interests. Director must bear the economic risk of the Insider Shares until the Insider Shares are sold pursuant to: (x) an
effective registration statement under the Securities Act or (y) an exemption from registration available with respect to such sale. Director is able to bear the economic risks and to afford a complete loss of Director’s investment in the
Insider Shares.

  
 1 

 2.1.5. Access to Information; Independent Investigation. Prior to the execution of
this Agreement, Director has had the opportunity to ask questions of and receive answers from representatives of the Company concerning the Company, as well as the finances, operations, business and prospects of the Company, and the opportunity to
obtain additional information to verify the accuracy of all information so obtained. Director has relied solely on Director’s own knowledge and understanding of the Company and its business based upon Director’s own due diligence
investigation and the information furnished pursuant to this paragraph. Director understands that no person has been authorized to give any information or to make any representations which were not furnished pursuant to this
Section 2 and Director has not relied on any other representations or information in making his investment decision, whether written or oral, relating to the Company, its operations or its prospects. 

2.1.6. Restrictions on Transfer; Shell Company. Director understands the Insider Shares are being offered in a transaction not
involving a public offering within the meaning of the Securities Act. Director understands the Insider Shares will be “restricted securities” as defined in Rule 144(a)(3) under the Securities Act and Director understands that the
certificate representing the Insider Shares will contain a legend in respect of such restrictions. If in the future the Director decides to offer, resell, pledge or otherwise transfer the Insider Shares, such Insider Shares may be offered, resold,
pledged or otherwise transferred only in accordance with the provisions of Sections 4.1 and 4.2 hereof. Director agrees that if any transfer of its Insider Shares or any interest therein is proposed to be made, as a condition precedent
to any such transfer, Director may be required to deliver to the Company an opinion of counsel satisfactory to the Company. Absent registration or an exemption, the Director agrees not to resell the Insider Shares. Director further acknowledges that
because the Company is a shell company, Rule 144 may not be available to the Director for the resale of the Insider Shares until at least one year following consummation of the initial Business Combination of the Company, despite technical
compliance with the certain requirements of Rule 144 and the release or waiver of any contractual transfer restrictions. For the purposes of this Agreement, the term “Business Combination” means a merger, share exchange,
asset acquisition, stock purchase, recapitalization, reorganization or other similar business combination with one or more businesses or entities. 

3. Waiver of Liquidation Distributions; Redemption Rights. In connection with the Insider Shares granted pursuant to this
Agreement, the Director hereby waives any and all right, title, interest or claim of any kind in or to any distributions by the Company from the trust account which will be established for the benefit of the Company’s public stockholders and
into which substantially all of the proceeds of the initial public offering of the Company’s equity securities (the “IPO”) will be deposited (the “Trust Account”), in the event of a liquidation of
the Company upon the Company’s failure to timely complete an initial Business Combination. For purposes of clarity, in the event the Director purchases Common Stock in the IPO or in the aftermarket, any additional Common Stock so granted shall
be eligible to receive any liquidating distributions by the Company. However, in no event will the Director have the right to redeem any shares of Common Stock into funds held in the Trust Account upon the successful completion of an initial
Business Combination. 
 4. Restrictions on Transfer. 

4.1. Securities Law Restrictions. In addition to the restrictions set forth in Section 4, Director shall
not sell, transfer, pledge, hypothecate or dispose of all or any part of the Insider Shares prior to the date on which the Company completes its initial Business Combination. Notwithstanding the foregoing, Director may transfer the Insider Shares to
Permitted Transferees as such term is defined in the Insider Letter (as defined below), provided that such Permitted Transferees must agree in writing to be bound by this Section 4 and such Insider Shares remain subject to
forfeiture as provided in Section 5. Director agrees not to sell, transfer, pledge, hypothecate or otherwise dispose of all or any part of the Insider Shares unless, prior thereto (a) a registration statement on the
appropriate form under the Securities Act and applicable state securities laws with respect to the Insider Shares proposed to be transferred shall then be effective or (b) the Company has received an opinion from counsel reasonably satisfactory
to the Company, that such registration is not required because such transaction is exempt from registration under the Securities Act and the rules promulgated by the Securities and Exchange Commission thereunder and with all applicable state
securities laws. 
 4.2. Lock-ups. Director acknowledges that the Insider Shares will be subject to restrictions on transfer
(the “Lock-ups”) contained in that certain letter agreement (the “Insider Letter”), of even date herewith, by and between the Company, the undersigned and
each other person who is, as of the date hereof, an executive officer, director or director nominee of the Company, which Insider Letter shall be substantially in the form to be filed as an exhibit to the Registration Statement. 

  
 2 

 4.3. Restrictive Legends. All certificates representing the Insider Shares shall have
endorsed thereon legends substantially as follows: 
 “THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED, OR ANY STATE SECURITIES LAWS AND NEITHER THE SECURITIES NOR ANY INTEREST THEREIN MAY BE OFFERED, SOLD, TRANSFERRED, PLEDGED OR OTHERWISE DISPOSED OF EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER SUCH ACT OR SUCH LAWS OR AN
EXEMPTION FROM REGISTRATION UNDER SUCH ACT AND SUCH LAWS WHICH, IN THE OPINION OF COUNSEL, IS AVAILABLE.” 
 “THE SECURITIES REPRESENTED BY THIS
CERTIFICATE ARE SUBJECT TO LOCK-UP PROVISIONS AND MAY NOT BE OFFERED, SOLD, TRANSFERRED, PLEDGED OR OTHERWISE DISPOSED DURING THE TERM OF THE LOCKUP PERIOD. ANY TRANSFEREE SHALL BE SUBJECT TO THE RESTRICTIONS
SET FORTH IN THE GRANT AGREEMENT.” 
 4.4. Additional Insider Shares or Substituted Securities. In the event of the
declaration of a stock dividend, the declaration of a special dividend payable in a form other than Common Stock, a spin-off, a stock split, an adjustment in conversion ratio, a recapitalization or a similar
transaction affecting the Company’s outstanding Common Stock without receipt of consideration, any new, substituted or additional securities or other property which are by reason of such transaction distributed with respect to any Insider
Shares subject to Section 4 and Subsections 4.4-4.5, or into which such Insider Shares thereby become convertible shall immediately be subject to this
Section 4. Appropriate adjustments to reflect the distribution of such securities or property shall be made to the number or class of Insider Shares subject to this Section 4. 

4.5. Registration Rights. Director acknowledges that the Insider Shares are being acquired pursuant to an exemption from the
registration requirements of the Securities Act and will become freely tradable only after certain conditions are met or they are registered pursuant to a Registration Rights Agreement to be entered into with the Company prior to the closing of the
IPO. 
 5. Forfeiture. If Director ceases to be a member of the Board due to Director’s resignation or removal for cause at
time prior to the date on which the Company completes its initial Business Combination, all of the Insider Shares granted hereunder will be automatically forfeited by Director for no consideration and immediately cancelled by the Company. 

6. Voting and Redemption of Insider Shares. Director agrees to vote the Insider Shares in favor of an initial Business Combination
that the Company negotiates and submits for approval to the Company’s stockholders and shall not seek redemption with respect to such Insider Shares. Additionally, the Director agrees not to redeem any Insider Shares in connection with a
redemption or tender offer presented to the Company’s stockholders in connection with an initial Business Combination negotiated by the Company. 

7. Section 83(b) Election. Director understands that Section 83(a) of the Internal Revenue Code of 1986, as amended (the
“Code”), taxes as ordinary income the difference between the amount paid for the Insider Shares and the Fair Market Value of the Insider Shares as of the date any restrictions on the Insider Shares lapse. In this context,
“restriction” means the obligation of Director to forfeit the Insider Shares as set forth in Section 5 of this Agreement. Director understands that Director may elect to be taxed at the time the Insider
Shares are purchased, rather than when and as the restriction expires, by filing an election under Section 83(b) (an “83(b) Election”) of the Code with the Internal Revenue Service within thirty (30) days from the date of
grant. Even if the Fair Market Value of the Insider Shares at the time of the execution of this Agreement equals the amount paid for the Insider Shares, the election must be made to avoid income under Section 83(a) in the future. Director
understands that failure to file such an election in a timely manner may result in adverse tax consequences for Director. Director further understands that an additional copy of such election form should be filed with his federal income tax return
for the calendar year in which the date of this Agreement falls. Director acknowledges that the foregoing is only a summary of the effect of United States federal income taxation with respect to purchase of the Insider Shares

  
 3 

 
hereunder, and does not purport to be complete. Director further acknowledges that the Company has directed Director to seek independent advice regarding the applicable provisions of the Code,
the income tax laws of any municipality, state or foreign country in which Director may reside, and the tax consequences of Director’s death. 

Director agrees that he will execute and deliver to the Company with this executed Agreement a copy of the Acknowledgment and Statement of Decision Regarding
Section 83(b) Election (the “Acknowledgment”), attached hereto as Exhibit A. Director further agrees that Director will execute and submit with the Acknowledgment a copy of the 83(b) Election, attached
hereto as Exhibit B, if Director has indicated in the Acknowledgment his decision to make such an election. 
 8.
Tax Consequences. Purchaser should obtain advice from an appropriate independent professional adviser with respect to, and under the laws of Purchaser’s country of residence and/or citizenship, the taxation implications of the grant,
issuance, purchase, retention, assignment, release, cancellation, sale or any other disposal of the Shares (each, a “Trigger Event”). Purchaser should also obtain advice in respect of the taxation indemnity provisions under
Section 7 below. 
 9. Indemnification; Tax Indemnity. Each party shall indemnify the other against any loss, cost or
damages (including reasonable attorneys’ fees and expenses) incurred as a result of such party’s breach of any representation, warranty, covenant or agreement in this Agreement. Notwithstanding the foregoing or anything herein to the
contrary, to the extent permitted by law, Director hereby agrees to indemnify and keep indemnified the Company and the Company as trustee for and on behalf of any affiliate entity, in respect of any liability or obligation of the Company and/or any
affiliate entity to account for income tax or any other taxation provisions under the laws of Director’s country of citizenship and/or residence to the extent arising from a Trigger Event. 

10. Other Agreements. 

10.1. Further Assurances. Director agrees to execute such further instruments and to take such further action as may reasonably be
necessary to carry out the intent of this Agreement. 
 10.2. Notices. All notices, statements or other documents which are
required or contemplated by this Agreement shall be in writing and delivered: (i) personally or sent by first class registered or certified mail, overnight courier service or facsimile or electronic transmission to the address designated in
writing, (ii) by facsimile to the number most recently provided to such party or such other address or fax number as may be designated in writing by such party and (iii) by electronic mail, to the electronic mail address most recently
provided to such party or such other electronic mail address as may be designated in writing by such party. Any notice or other communication so transmitted shall be deemed to have been given on the day of delivery, if delivered personally, on the
business day following receipt of written confirmation, if sent by facsimile or electronic transmission, one (1) business day after delivery to an overnight courier service or five (5) days after mailing if sent by mail. 

10.3. Entire Agreement. This Agreement, together with the Insider Letter and the Registration Rights Agreement, embodies the entire
agreement and understanding between the Director and the Company with respect to the subject matter hereof and supersedes all prior oral or written agreements and understandings relating to the subject matter hereof. No statement, representation,
warranty, covenant or agreement of any kind not expressly set forth in this Agreement shall affect, or be used to interpret, change or restrict, the express terms and provisions of this Agreement. 

10.4. Modifications and Amendments. The terms and provisions of this Agreement may be modified or amended only by written agreement
executed by all parties hereto. 
 10.5. Waivers and Consents. The terms and provisions of this Agreement may be waived, or
consent for the departure therefrom granted, only by written document executed by the party entitled to the benefits of such terms or provisions. No such waiver or consent shall be deemed to be or shall constitute a waiver or consent with respect to
any other terms or provisions of this Agreement, whether or not similar. Each such waiver or consent shall be effective only in the specific instance and for the purpose for which it was given, and shall not constitute a continuing waiver or
consent. 

  
 4 

 10.6. Assignment. The rights and obligations under this Agreement may not be assigned
by either party hereto without the prior written consent of the other party. 
 10.7. Benefit. All statements, representations,
warranties, covenants and agreements in this Agreement shall be binding on the parties hereto and shall inure to the benefit of the respective successors and permitted assigns of each party hereto. Nothing in this Agreement shall be construed to
create any rights or obligations except among the parties hereto, and no person or entity shall be regarded as a third-party beneficiary of this Agreement. 

10.8. Governing Law. This Agreement and the rights and obligations of the parties hereunder shall be construed in accordance with
and governed by the laws of New York applicable to contracts wholly performed within the borders of such state, without giving effect to the conflict of law principles thereof. 

10.9. Severability. In the event that any court of competent jurisdiction shall determine that any provision, or any portion
thereof, contained in this Agreement shall be unreasonable or unenforceable in any respect, then such provision shall be deemed limited to the extent that such court deems it reasonable and enforceable, and as so limited shall remain in full force
and effect. In the event that such court shall deem any such provision, or portion thereof, wholly unenforceable, the remaining provisions of this Agreement shall nevertheless remain in full force and effect. 

10.10. No Waiver of Rights, Powers and Remedies. No failure or delay by a party hereto in exercising any right, power or remedy
under this Agreement, and no course of dealing between the parties hereto, shall operate as a waiver of any such right, power or remedy of such party. No single or partial exercise of any right, power or remedy under this Agreement by a party
hereto, nor any abandonment or discontinuance of steps to enforce any such right, power or remedy, shall preclude such party from any other or further exercise thereof or the exercise of any other right, power or remedy hereunder. The election of
any remedy by a party hereto shall not constitute a waiver of the right of such party to pursue other available remedies. No notice to or demand on a party not expressly required under this Agreement shall entitle the party receiving such notice or
demand to any other or further notice or demand in similar or other circumstances or constitute a waiver of the rights of the party giving such notice or demand to any other or further action in any circumstances without such notice or demand. 

10.11. Survival of Representations and Warranties. All representations and warranties made by the parties hereto in this Agreement
or in any other agreement, certificate or instrument provided for or contemplated hereby, shall survive the execution and delivery hereof and any investigations made by or on behalf of the parties. 

10.12. No Broker or Finder. Each of the parties hereto represents and warrants to the other that no broker, finder or other
financial consultant has acted on its behalf in connection with this Agreement or the transactions contemplated hereby in such a way as to create any liability on the other. Each of the parties hereto agrees to indemnify and hold the other harmless
from any claim or demand for commission or other compensation by any broker, finder, financial consultant or similar agent claiming to have been employed by or on behalf of such party and to bear the cost of legal expenses incurred in defending
against any such claim. 
 10.13. Headings and Captions. The headings and captions of the various sections of this Agreement are
for convenience of reference only and shall in no way modify or affect the meaning or construction of any of the terms or provisions hereof. 

10.14. Counterparts. This Agreement may be executed in one or more counterparts, all of which when taken together shall be
considered one and the same agreement and shall become effective when counterparts have been signed by each party and delivered to the other party, it being understood that both parties need not sign the same counterpart. In the event that any
signature is delivered by facsimile transmission or any other form of electronic delivery, such signature shall create a valid and binding obligation of the party executing (or on whose behalf such signature is executed) with the same force and
effect as if such signature page were an original thereof. 
 10.15. Construction. The words “include,”
“includes,” and “including” will be deemed to be followed by “without limitation.” Pronouns in masculine, feminine, and neuter genders will be construed to include any other gender, and words in the
singular form will be construed to include the plural and vice versa, unless the context 

  
 5 

 
otherwise requires. The words “this Agreement,” “herein,” “hereof,” “hereby,” “hereunder,” and words of
similar import refer to this Agreement as a whole and not to any particular section unless expressly so limited. The parties hereto intend that each representation, warranty, and covenant contained herein will have independent significance. If any
party hereto has breached any representation, warranty, or covenant contained herein in any respect, the fact that there exists another representation, warranty or covenant relating to the same subject matter (regardless of the relative levels of
specificity) which such party hereto has not breached will not detract from or mitigate the fact that such party hereto is in breach of the first representation, warranty, or covenant. 

10.16. Mutual Drafting. This Agreement is the joint product of the Director and the Company and each provision hereof has been
subject to the mutual consultation, negotiation and agreement of such parties and shall not be construed for or against any party hereto. 

[Signature Page Follows] 

  
 6 

 If the foregoing accurately sets forth our understanding and agreement, please sign the enclosed
copy of this Agreement and return it to us. 
  

	
	Very truly yours,
	
	
	GIGCAPITAL, INC.
	
	  

	Dr. Avi S. Katz, Chairman of the Board and Chief Executive Officer

 Accepted and agreed this
        th day of December, 2017. 
  

	
	  

	[NAME]

 Signature Page to Subscription Agreement – Director Nominees 

 EXHIBIT A 

ACKNOWLEDGMENT AND STATEMENT OF DECISION 

REGARDING SECTION 83(b) ELECTION 

The undersigned (which term includes the undersigned’s spouse), a grantee of
[                    ] shares (the “Insider Shares”) of Common Stock of GigCapital, Inc., a Delaware corporation (the
“Company”) hereby states as follows: 
 1. The undersigned either [check and complete as applicable]: 

 

	 	(a)	        has consulted, and has been fully advised by, the undersigned’s own tax advisor,
                                        , whose
business address is
                                        ,
regarding the federal, state and local tax consequences of acquiring the Insider Shares, and particularly regarding the advisability of making elections pursuant to Section 83(b) of the Internal Revenue Code of 1986, as amended (the
“Code”) and pursuant to the corresponding provisions, if any, of applicable state law; or 

  

	 	(b)	         has knowingly chosen not to consult such a tax advisor. 

2. The undersigned hereby states that the undersigned has decided [check as applicable]: 

 

	 	(a)	         to make an election pursuant to Section 83(b) of the Code, and is submitting to the Company, together with the undersigned’s executed Insider Shares Grant
Agreement, an executed form entitled “Election Under Section 83(b) of the Internal Revenue Code of 1986;” or 

  

	 	(b)	        not to make an election pursuant to Section 83(b) of the Code. 

3. Neither the Company nor any subsidiary or representative of the Company has made any warranty or representation to the undersigned with
respect to the tax consequences of the undersigned’s acceptance of Insider Shares or of the making or failure to make an election pursuant to Section 83(b) of the Code or the corresponding provisions, if any, of applicable state law. 

 

			
	Date:                                     
                                         
                                        	  	  

		  	[Director]
		
	Date:                                     
                                         
                                        	  	  

		  	Spouse of [Director]

 EXHIBIT B 

ELECTION UNDER SECTION 83(b) 

OF THE INTERNAL REVENUE CODE OF 1986 

The undersigned taxpayer hereby elects, pursuant to Section 83(b) of the Internal Revenue Code, to include in taxpayer’s gross
income for the current taxable year, the amount of any compensation taxable to taxpayer in connection with taxpayer’s receipt of the property described below: 
  

	1.	The name, address, taxpayer identification number and taxable year of the undersigned are as follows: 

NAME OF TAXPAYER:
                                        

 NAME OF SPOUSE:
                                        

 ADDRESS:
                                         
    
  

                       
                                         
                 
 IDENTIFICATION NO. OF TAXPAYER:
                                        

 IDENTIFICATION NO. OF SPOUSE:
                                        

 TAXABLE YEAR:
                                        

  

	2.	The property with respect to which the election is made is described as follows: 

                       
                  shares of the Common Stock of GigCapital, Inc., a Delaware corporation (the “Company”). 

 

	3.	The date on which the property was transferred is:
                                        

  

	4.	The property is subject to the following restrictions: 

 The shares are subject to forfeiture
and cancellation by the Company for no consideration upon termination of taxpayer’s employment or consulting relationship due to taxpayer’s resignation or termination for cause prior to the date of the Company’s initial Business
Combination (as defined in the grant agreement). 
  

	5.	The fair market value at the time of transfer, determined without regard to any restriction other than a restriction which by its terms will never lapse, of such property is:
$                            . 

 

	6.	The amount (if any) paid for such property:
$                                 

 The undersigned has submitted a copy of this statement to the person for whom the services were performed in
connection with the undersigned’s receipt of the above-described property. The transferee of such property is the person performing the services in connection with the transfer of said property. 

The undersigned understands that the foregoing election may not be revoked except with the consent of the Commissioner. 

 

			
	Dated: ___________________	  	  

		  	[Director]
		
	Dated: ___________________	  	  

		  	Spouse of [Director]EX-10.10

 Exhibit 10.10 

UNIT PURCHASE AGREEMENT 

THIS UNIT PURCHASE AGREEMENT, dated as of December [•] 2017 (as it may from time to time be amended and including all exhibits referenced
herein, this “Agreement”), is entered into by and between GigCapital, Inc., a Delaware corporation (the “Company”), and GigAcquisitions, LLC, a Delaware limited liability company (the “Purchaser”).

 WHEREAS, the Company intends to consummate an underwritten initial public offering (the “Public Offering”) of 15,000,000
units (“Public Units”), with each such unit consisting of one share of common stock, par value $0.0001 per share (“Common Stock”), of the Company, one right to receive
one-tenth (1/10) of one share of Common Stock (the “Right(s)”) and one-half ( 1⁄2) of a warrant, where each whole warrant entitles the holder to purchase one share of Common Stock at an exercise price of $11.50 per share; 

WHEREAS, the underwriters engaged for the Public Offering have the option to purchase up to an additional 2,250,000 Public Units within 45-days of the closing of the Public Offering, solely to cover over-allotments (the “Over-Allotment Option”); 

WHEREAS, the Purchaser wishes to purchase 392,364 units, or up to 400,000 units if the Over-Allotment Option is exercised in full (the
“Private Units”), in a private placement, as provided herein; 
 NOW THEREFORE, in consideration of the mutual promises
contained in this Agreement and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties to this Agreement hereby, intending legally to be bound, agree as follows: 

AGREEMENT 

Section 1. Authorization, Purchase and Sale; Terms of the Private Units. 

A. Authorization of the Private Units. The Company has duly authorized the issuance and sale of the Private Units to the Purchaser,
and the issuance and sale of the securities underlying the Private Units, including the shares of Common Stock included in the Private Units, the warrants included in the Private Units (the “Private Warrants”), the Rights included
in the Private Units (the “Private Rights”), and the shares of Common Stock underlying the Prvate Rights, as well as, upon proper exercise of the Private Warrants and against payment therefor, the shares of Common Stock underlying
the Private Warrants, (the aforenamed securities, collectively, the “Securities”). 
 B. Purchase and Sale of the
Private Units. 
 (i) As payment in full for an initial tranche of 392,364 units (the “Initial Private Units”) being
purchased under this Agreement, Purchaser shall pay $3,923,640 (the “Purchase Price”), by wire transfer of immediately available funds or by such other method as may be reasonably acceptable to the Company, to the trust account
(the “Trust Account”) at a financial institution to be chosen by the Company, maintained by Continental Stock Transfer & Trust Company, acting as trustee, at least one (1) business day prior to the date of
effectiveness of the Registration Statement on Form S-1 to be filed in connection with the Public Offering (the “Registration Statement”). 

(ii) In the event that the Over-Allotment Option is exercised in full or in part, Purchaser shall purchase up to an additional 7,636 units (the
“Additional Private Units”), in the same proportion as the amount of the Over-Allotment Option that is exercised, and simultaneously with such purchase of 

  
 1 

 
Additional Private Units, as payment in full for the Additional Private Units being purchased hereunder, and at least one (1) business day prior to the closing of all or any portion of the
Over-Allotment Option, Purchaser shall pay $10.00 per Additional Private Unit, up to an aggregate amount of $76,360 by wire transfer of immediately available funds or by such other method as may be reasonably acceptable to the Company, to the Trust
Account. 
 (iii) The closing of the purchase and sale of the Initial Private Units shall take place simultaneously with the closing of the
Public Offering (the “Initial Closing Date”). The closing of the purchase and sale of the Additional Private Units, if applicable, shall take place simultaneously with the closing of all or any portion of the Over-Allotment Option
(such closing date, together with the Initial Closing Date, the “Closing Dates” and each, a “Closing Date”). The closings of the purchase and sale of the Initial Private Units and the Additional Private Units shall
take place at the offices of Crowell & Moring LLP, 3 Embarcadero Center, San Francisco, CA 94111, or such other place as may be agreed upon by the parties hereto. 

C. Description of the Private Units. 

(i) Each Private Unit shall include one share of Common Stock, one Private Right and one-half ( 1⁄2) of a Private Warrant. Each whole Private Warrant shall entitle the holder to purchase one share of Common Stock at a purchase price of $11.50 per share; 

(ii) The Private Warrants shall have their terms set forth in a warrant agreement (the “Warrant Agreement”) to be entered into
by the Company and Continental Stock Transfer & Trust Company, acting as warrant agent, in connection with the Public Offering; 

(iii) The Rights shall have their terms set forth in a right agreement (the “Right Agreement”) to be entered into by the
Company and Continental Stock Transfer & Trust Company, acting as rights agent in connection with the Public Offering. 
 (iv) At or
prior to the time of the Initial Closing Date, the Company and the Purchaser shall enter into a registration rights agreement (the “Registration Rights Agreement”) pursuant to which the Company shall grant certain registration
rights to the Purchaser relating to the shares of Common Stock included in the Private Units, the shares of Common Stock underlying the Private Warrants, and the shares of Common Stock underlying the Private Rights. 

Section 2. Representations and Warranties of the Company. As a material inducement to the Purchaser to enter
into this Agreement and purchase the Private Units, including the underlying Securities, the Company hereby represents and warrants to the Purchaser that: 

A. Organization and Corporate Power. The Company is a corporation duly organized, validly existing and in good standing under the
laws of the State of Delaware and is qualified to do business in every jurisdiction in which the failure to so qualify would reasonably be expected to have a material adverse effect on the financial condition, operating results or assets of the
Company. The Company possesses all requisite corporate power and authority necessary to carry out the transactions contemplated by this Agreement, the Warrant Agreement and the Right Agreement. 

B. Authorization; No Breach. 
 (i) The
execution, delivery and performance of this Agreement and the transactions contemplated hereby has been duly authorized by the Company as of the Closing Dates. This Agreement constitutes the valid and binding obligation of the Company, enforceable
in accordance with its terms. Upon issuance in 

  
 2 

 
accordance with, and payment pursuant to, the terms of the Warrant Agreement and this Agreement, the Private Warrants will constitute valid and binding obligations of the Company, enforceable in
accordance with their terms as of the Closing Dates. Upon issuance in accordance with, and payment pursuant to, the terms of the Right Agreement and this Agreement, the Private Rights will constitute valid and binding obligations of the Company,
enforceable in accordance with their terms as of the Closing Dates. 
 (ii) The execution and delivery by the Company of this Agreement, and
the fulfillment of, and compliance with, the respective terms hereof by the Company, do not and will not as of the Closing Dates (a) conflict with or result in a breach of the terms, conditions or provisions of, (b) constitute a default
under, (c) result in the creation of any lien, security interest, charge or encumbrance upon the Company’s capital stock or assets under, (d) result in a violation of, or (e) require any authorization, consent, approval,
exemption or other action by or notice or declaration to, or filing with, any court or administrative or governmental body or agency pursuant to the certificate of incorporation or the bylaws of the Company (each, as in effect on the date hereof or
as may be amended prior to completion of the Public Offering), or any material law, statute, rule or regulation to which the Company is subject, or any agreement, order, judgment or decree to which the Company is subject, except for any filings
required after the date hereof under United States federal or state securities laws. 
 C. Title to Securities. Upon issuance in
accordance with, and payment pursuant to, the terms hereof and, as applicable, the terms of the Warrant Agreement and the Right Agreement, the Private Units, including the underlying Securities, will be duly and validly issued, fully paid and non-assessable. Upon issuance in accordance with, and payment pursuant to, the terms hereof, and, as applicable, the terms of the Warrant Agreement and the Right Agreement, the Purchaser will have good title to the
Private Units, including the underlying Securities, free and clear of all liens, claims and encumbrances of any kind, other than (i) transfer restrictions hereunder and under the other agreements contemplated hereby, (ii) transfer
restrictions under federal and state securities laws, and (iii) liens, claims or encumbrances imposed due to the actions of the Purchaser. 

D. Governmental Consents. No permit, consent, approval or authorization of, or declaration to or filing with, any governmental
authority is required in connection with the execution, delivery and performance by the Company of this Agreement or the consummation by the Company of any other transactions contemplated hereby. 

Section 3. Representations and Warranties of the Purchaser. As a material inducement to the Company to enter
into this Agreement and issue and sell the Private Units, including the underlying Securities, to the Purchaser, the Purchaser hereby represents and warrants to the Company that: 

A. Organization and Power. The Purchaser is a limited liability company duly organized, validly existing and in good standing under
the laws of the State of Delaware and is qualified to do business in every jurisdiction in which the failure to so qualify would reasonably be expected to have a material adverse effect on the financial condition, operating results or assets of the
Company. The Purchaser possesses all requisite power and authority necessary to carry out the transactions contemplated by this Agreement, the Warrant Agreement and the Right Agreement. 

B. Authorization; No Breach. 

(i) This Agreement constitutes a valid and binding obligation of the Purchaser, enforceable in accordance with its terms, subject to
bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and other laws of general applicability relating to or affecting creditors’ rights and to general equitable principles (whether considered in a proceeding in equity or
law). 

  
 3 

 (ii) The execution and delivery by the Purchaser of this Agreement and the fulfillment of and
compliance with the terms hereof by the Purchaser does not and shall not as of the Closing Dates conflict with or result in a breach by the Purchaser of the terms, conditions or provisions of any agreement, instrument, order, judgment or decree to
which the Purchaser is subject. 
 C. Investment Representations. 

(i) The Purchaser is acquiring the Private Units, including the underlying Securities, for the Purchaser’s own account, for investment
purposes only and not with a view towards, or for resale in connection with, any public sale or distribution thereof. 
 (ii) The Purchaser
is an “accredited investor” as such term is defined in Rule 501(a)(3) of Regulation D. 
 (iii) The Purchaser understands
that the Private Units, including the underlying Securities, are being offered and will be sold to it in reliance on specific exemptions from the registration requirements of the United States federal and state securities laws and that the Company
is relying upon the truth and accuracy of, and the Purchaser’s compliance with, the representations and warranties of the Purchaser set forth herein in order to determine the availability of such exemptions and the eligibility of the Purchaser
to acquire the Private Units and the underlying Securities. 
 (iv) The Purchaser did not enter into this Agreement as a result of any
general solicitation or general advertising within the meaning of Rule 502(c) under the Securities Act of 1933, as amended (the “Securities Act”). 

(v) The Purchaser has been furnished with all materials relating to the business, finances and operations of the Company and materials relating
to the offer and sale of the Private Units, including the underlying Securities, which have been requested by the Purchaser. The Purchaser has been afforded the opportunity to ask questions of the executive officers and directors of the Company. The
Purchaser understands that its investment in the Private Units, and the underlying Securities, involves a high degree of risk and it has sought such accounting, legal and tax advice as it has considered necessary to make an informed investment
decision with respect to the acquisition of the Private Units and the underlying Securities. 
 (vi) The Purchaser understands that no United
States federal or state agency or any other government or governmental agency has passed on or made any recommendation or endorsement of the Private Units, or the underlying Securities, or the fairness or suitability of the investment in the Private
Units, or the underlying Securities, by the Purchaser nor have such authorities passed upon or endorsed the merits of the offering of the Private Units, including the underlying Securities. 

(vii) The Purchaser understands that: (a) the Private Units and the underlying Securities have not been and are not being registered under
the Securities Act or any state securities laws, and may not be offered for sale, sold, assigned or transferred unless (1) subsequently registered thereunder or (2) sold in reliance on an exemption therefrom; and (b) except as
specifically set forth in the Registration Rights Agreement, neither the Company nor any other person is under any obligation to register the Private Units or the underlying Securities under the Securities Act or any state securities laws or to
comply with the terms and conditions of any exemption thereunder. 
 (viii) The Purchaser has such knowledge and experience in financial and
business matters, knowledge of the high degree of risk associated with investments in the securities of companies in the development stage such as the Company, is capable of evaluating the merits and risks of an investment in

  
 4 

 
the Securities and is able to bear the economic risk of an investment in the Private Units, including the underlying Securities, in the amount contemplated hereunder for an indefinite period of
time. The Purchaser has adequate means of providing for its current financial needs and contingencies and will have no current or anticipated future needs for liquidity which would be jeopardized by the investment in the Private Units or the
underlying Securities. The Purchaser can afford a complete loss of its investments in the Private Units and the underlying Securities. 

Section 4. Conditions of the Purchaser’s Obligations. The obligations of the Purchaser to purchase and pay
for the Private Units are subject to the fulfillment, on or before the Closing Dates, of each of the following conditions: 

A. Representations and Warranties. The representations and warranties of the Company contained in Section 2 shall be true and
correct at and as of the Closing Dates as though then made. 
 B. Performance. The Company shall have performed and complied with
all agreements, obligations and conditions contained in this Agreement that are required to be performed or complied with by it on or before the Closing Dates. 

C. No Injunction. No litigation, statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted,
entered, promulgated or endorsed by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization having authority over the matters contemplated hereby, which prohibits the consummation of any of the
transactions contemplated by this Agreement, the Warrant Agreement or the Right Agreement. 
 D. Warrant Agreement. The Company
shall have entered into a Warrant Agreement with Continental Stock Transfer and Trust Company, as warrant agent, on terms satisfactory to the Purchaser. 

E. Right Agreement. The Company shall have entered into a Right Agreement with Continental Stock Transfer and Trust Company, as
rights agent, on terms satisfactory to the Purchaser. 
 F. Insider Letter. The Company shall have entered into a letter (the
“Insider Letter”) by and among the Purchaser, the Company and certain other parties, setting forth certain voting agreements, restrictions on transfer (the “Lock-ups”) and
other agreements applicable to the Securities, the terms of which shall be satisfactory to the Purchaser. 

Section 5. Conditions of the Company’s Obligations. The obligations of the Company to the Purchaser under
this Agreement are subject to the fulfillment, on or before the Closing Dates, of each of the following conditions: 

A. Representations and Warranties. The representations and warranties of the Purchaser contained in Section 3 shall be true
and correct at and as of the Closing Dates as though then made. 
 B. Performance. The Purchaser shall have performed and
complied with all agreements, obligations and conditions contained in this Agreement that are required to be performed or complied with by the Purchaser on or before the Closing Dates. 

C. No Injunction. No litigation, statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted,
entered, promulgated or endorsed by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization having authority over the matters contemplated hereby, which prohibits the consummation of any of the
transactions contemplated by this Agreement, the Warrant Agreement or the Right Agreement. 

  
 5 

 D. Warrant Agreement and Registration Rights Agreement. The Company shall have
entered into a Warrant Agreement with Continental Stock Transfer and Trust Company, as warrant agent, and the Registration Rights Agreement, each on terms satisfactory to the Company. 

E. Right Agreement. The Company shall have entered into a Right Agreement with Continental Stock Transfer and Trust Company, as
rights agent, on terms satisfactory to the Company. 
 F. Insider Letter. The Purchaser shall have entered into an Insider Letter
setting forth certain voting agreements, Lock-ups and other agreements applicable to the Securities, the terms of which shall be satisfactory to the Company. 

Section 6. Lock-ups. The Purchaser acknowledges that the Securities will be subject to the
Lock-ups contained in the Insider Letter.     

Section 7. Termination. This Agreement may be terminated by the Company at any time after December 31,
2017 upon written notice to the Purchaser if the closing of the Public Offering does not occur prior to such date. 

Section 8. Survival of Representations and Warranties. All of the representations and warranties contained
herein shall survive the Closing Dates. 
 Section 9. Definitions. Terms used but not otherwise defined in
this Agreement shall have the meaning assigned to such terms in the Registration Statement. 
 Section 10. Miscellaneous. 

A. Successors and Assigns. Except as otherwise expressly provided herein, all covenants and agreements contained in this Agreement
by or on behalf of any of the parties hereto shall bind and inure to the benefit of the respective successors of the parties hereto whether so expressed or not. Notwithstanding the foregoing or anything to the contrary herein, the parties may not
assign this Agreement, other than assignments by the Purchaser to affiliates thereof. 
 B. Severability. Whenever possible, each
provision of this Agreement shall be interpreted in such manner as to be effective and valid under applicable law, but if any provision of this Agreement is held to be prohibited by or invalid under applicable law, such provision shall be
ineffective only to the extent of such prohibition or invalidity, without invalidating the remainder of this Agreement. 

C. Counterparts. This Agreement may be executed simultaneously in two or more counterparts, none of which need contain the
signatures of more than one party, but all such counterparts taken together shall constitute one and the same agreement. 

D. Descriptive Headings; Interpretation. The descriptive headings of this Agreement are inserted for convenience only and do not
constitute a substantive part of this Agreement. The use of the word “including” in this Agreement shall be by way of example rather than by limitation. 

E. Governing Law. This Agreement shall be deemed to be a contract made under the laws of the State of New York and for all purposes
shall be construed in accordance with the internal laws of the State of New York. 

  
 6 

 F. Amendments. This Agreement may not be amended, modified or waived as to any
particular provision, except by a written instrument executed by all parties hereto. 
 [Signature page to follow] 

  
 7 

 IN WITNESS WHEREOF, the parties hereto have executed this Agreement to be effective as of
the date first set forth above. 
  

			
	 GIGCAPITAL, INC.

    

Dr. Avi S. Katz, Chairman of the Board
 and Chief
Executive Officer
  
 GIGACQUISITIONS, LLC

    

Dr. Avi S. Katz, Manager

 Signature page to Unit Purchase Agreement (GigAcquisitions, LLC)

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00276-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00276-of-00352.parquet"}]]