X0306 4 2016-10-20 0 0001447669 TWILIO INC TWLO 0001506450 Deeter Byron B C/O BESSEMER VENTURE PARTNERS 1865 PALMER AVENUE, SUITE 104 LARCHMONT NY 10538 1 0 0 0 Class A Common Stock 2016-10-20 4 C 0 0 0.00 A 0 I See footnote Class B Common Stock 2016-10-20 4 C 0 0 0.00 D Class A Common Stock 0 0 I See footnote Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the holder and has no expiration date. The Reporting Person is a director of Deer VII & Co. Ltd., which is the general partner of Deer VII & Co. L.P., which is the general partner of Bessemer Venture Partners VII Institutional LP ("BVP VII Inst"), Bessemer Venture Partners VII, LP ("BVP VII") and BVP VII Special Opportunity Fund LP ("BVP VII SOF"). 15 Angels, LLC ("15 Angels" and, together with BVP VII SOF, BVP VII Inst and BVP VII, the "Funds") is a wholly-owned subsidiary of BVP VII Inst. The Reporting Person disclaims beneficial ownership of the securities held by the Funds, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of his pecuniary interest, if any, in the securities by virtue of his interest in Deer VII & Co. Ltd., his interest in Deer VII & Co. L.P. and his indirect limited partnership interest in the Funds. In connection with the registered public offering of shares of the Issuer's Class A Common Stock, pursuant to a final prospectus dated October 20, 2016, which offering is expected to be consummated on or about October 26, 2016, BVP VII Inst converted 423,457 shares of Class B Common Stock into Class A Common Stock, BVP VII converted 967,902 shares of Class B Common Stock into Class A Common Stock, BVP VII SOF converted 1,633,337 shares of Class B Common Stock into Class A Common Stock, and 15 Angels converted 59,955 shares of Class B Common Stock into Class A Common Stock. After the reported transaction, BVP VII Inst owned 2,399,591 shares of the Class B Common Stock, BVP VII owned 5,484,781 shares of Class B Common Stock, BVP VII SOF owned 9,255,574 shares of Class B Common Stock, and 15 Angels owned 339,747 shares of Class B Common Stock. /s/ Byron Deeter 2016-10-24