FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Katz Avi S
 2. Date of Event Requiring Statement (Month/Day/Year)
02/08/2021		 3. Issuer Name and Ticker or Trading Symbol
GigCapital4, Inc. [GIG]
(Last)
(First)
(Middle)
C/O GIGCAPITAL4, INC., 1731 EMBARCADERO ROAD, SUITE 200		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director __X__ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Executive Chairman
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

PALO ALTO, CA 94303		 6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 8,952,000 (1) (2)
I
By GigAcquisitions4, LLC (3)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Katz Avi S
C/O GIGCAPITAL4, INC.
1731 EMBARCADERO ROAD, SUITE 200
PALO ALTO, CA 94303		   X   X   Executive Chairman  
GigAcquisitions4, LLC
C/O GIGCAPITAL4, INC.
1731 EMBARCADERO ROAD, SUITE 200
PALO ALTO, CA 94303		     X    

Signatures

/s/ Dr. Avi S. Katz, individually 02/08/2021
**Signature of Reporting Person Date
/s/ Dr. Avi S. Katz, as Manager of GigAcquisitions4, LLC 02/08/2021
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The shares of common stock reflect a split on a 1.2-for-1 basis.
(2) Includes up to 1,170,000 shares of common stock that are subject to forfeiture depending on the extent to which the underwriters' over-allotment is exercised, if at all.
(3) The Common Stock is held directly by GigAcquisitions4, LLC (the "Sponsor"). The shares held by the Sponsor are beneficially owned by Dr. Katz, GigCapital4, Inc.'s Executive Chairman of the Board of Directors. Dr. Katz is also the Manager of the Sponsor, who has sole voting and dispositive power over the shares held by the Sponsor.

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