Sec Form 4 Filing - MARTIN BRYAN R @ 8X8 INC /DE/ - 2021-06-29

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person MARTIN BRYAN R 2. Issuer Name and Ticker or Trading Symbol 8X8 INC /DE/ [ EGHT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Technology Officer (Last) (First) (Middle) C/O 8X8, INC., 675 CREEKSIDE WAY 3. Date of Earliest Transaction (MM/DD/YY) 06/29/2021 (Street) CAMPBELL, CA95008 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 06/29/2021 A( 1 ) 9,013 A $ 0 26,015 D Common Stock 06/30/2021 S( 2 ) 4,533 D $ 27.772 21,482 D Common Stock 432,472 I Trust ( 3 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D ) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other MARTIN BRYAN R C/O 8X8, INC. 675 CREEKSIDE WAY CAMPBELL, CA95008 X Chief Technology Officer Signatures Cheriese M. Dickman, Attorney-In-Fact for Bryan R Martin 07/01/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The reporting person was awarded 24,418 performance share units (PSUs) on June 29, 2020, of which 33% were eligible to vest on each of the first, second and third anniversaries of the award date. On June 29, 2021, the first installment of 8,140 PSUs vested at 110.73% of target, such that 9,013 shares became issuable. Of these shares, 4,480 were issued to the reporting person and the remaining 4,533 were sold to pay the associated tax liability. ( 2 )Represents shares of common stock automatically sold to satisfy the reporting person's tax obligation in respect of the shares issued upon vesting of a performance equity award. ( 3 )Through the Martin Family Trust Dated August 3, 2000.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(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).

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