Sec Form 4 Filing - EPSTEIN JEFFREY E @ TWILIO INC - 2019-02-01

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 EPSTEIN JEFFREY E 2. Issuer Name and Ticker or Trading Symbol TWILIO INC [ TWLO] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O TWILIO INC., 375 BEALE STREET, SUITE 300 3. Date of Earliest Transaction (MM/DD/YY) 02/01/2019 (Street) SAN FRANCISCO, CA94105 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 Class A Common Stock 02/01/2019 A 12,998 ( 1 ) A $ 0 26,484 I See Footnote ( 2 ) Class A Common Stock 15,052 ( 3 ) D

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 EPSTEIN JEFFREY E C/O TWILIO INC. 375 BEALE STREET, SUITE 300 SAN FRANCISCO, CA94105 X Signatures /s/ Alexis Rhorer as attorney in fact for Reporting Person 02/05/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Pursuant to the Agreement and Plan of Merger and Reorganization, dated October 15, 2018, by and between Twilio Inc. ("Twilio"), SendGrid, Inc. ("SendGrid") and Topaz Merger Subsidiary, Inc., as amended on December 13, 2018 (the "Merger Agreement"), each share of common stock of SendGrid was canceled and automatically converted into 0.485 shares of Class A Common Stock of Twilio, with fractional shares being paid in cash as provided in the Merger Agreement. Mr. Epstein held 26,800 shares of common stock of SendGrid that pursuant to the Merger Agreement converted into 12,998 shares of Class A Common Stock of Twilio. ( 2 )These shares are held by the Epstein Family Revocable Trust. ( 3 )Includes 15,052 Restricted Stock Units ("RSUs") that have been deferred by the Reporting Person. Each RSU represents the contingent right to receive one share of the Issuer's Class A common stock.

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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