UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 _____________________________________________ ____________________________________________ Title of each class Trading Symbol(s) Name of each exchange on which registered Class A Common Stock, par value $0.001 per share TWLO The New York Stock Exchange Large accelerated filer ☒ Accelerated filer ☐ Non-accelerated filer ☐ Smaller reporting company ☐ Emerging growth company ☐ FORM 10-Q _____________________________________________ ☒ QUART ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 _____________________________________________ ____________________________________________ Title of each class Trading Symbol(s) Name of each exchange on which registered Class A Common Stock, par value $0.001 per share TWLO The New York Stock Exchange Large accelerated filer ☒ Accelerated filer ☐ Non-accelerated filer ☐ Smaller reporting company ☐ Emerging growth company ☐ FORM 10-Q _____________________________________________ ☒ QUART ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 _____________________________________________ _____________________________________________ ____________________________________________ Title of each class Trading Symbol(s) Name of each exchange on which registered Class A Common Stock, par value $0.001 per share TWLO The New York Stock Exchange Securities registered pursuant to Section 12(g) of the Act: None ____________________________________________ Large accelerated filer ☒ Accel ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 _____________________________________________ _____________________________________________ Title of each class Trading Symbol(s) Name of each exchange on which registered Class A Common Stock, par value $0.001 per share TWLO The New York Stock Exchange FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT 1934 For the quarterly period ended September 30, 2019 ☐ TRANSITION REPORT PURSUANT TO SECTION ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 _____________________________________________ _____________________________________________ FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT 1934 For the quarterly period ended June 30, 2019 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-37806 (8) twilio TWILIO INC. (Exact name of registrant as specified in its charter) ___ ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 _____________________________________________ FORM 10-Q _____________________________________________ ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT 1934 For the quarterly period ended March 31, 2019 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-37806 | --- | --- | --- | |-----------------------------------------------|----------- ...

Use these links to rapidly review the document TABLE OF CONTENTS Item 8. Financial Statements and Supplementary Data Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT 1934 For the fiscal year ended December 31, 2018 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-37806 Twili ...