TWLO

SEC source: 0001447669-19-000046 · wf-form4_157714172624134.xml · nonDerivative · entry 2

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 53,643

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: A portion of these shares represent Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A common stock.

SEC source: 0001447669-19-000046 · wf-form4_157714172624134.xml · nonDerivative · entry 1

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 52,414

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: A portion of these shares represent Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A common stock.

SEC source: 0001447669-19-000044 · wf-form4_157688620788965.xml · derivative · entry 6

Lawson Jeff · CIK 0001665930 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Lawson Revocable Trust

Disclosed balance after: 5,771,477

Underlying: Class A Common Stock · 25,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F7 · security: 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.

F7 · derivative.exercise_price: 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.

F7 · derivative.exercise_date: 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.

F7 · derivative.expiration_date: 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.

F1 · ownership.nature: Erica Freeman Lawson and Jeffrey Gordon Lawson Trustees of the Lawson Revocable Trust dated 10/2/11.

SEC source: 0001447669-19-000044 · wf-form4_157688620788965.xml · nonDerivative · entry 4

Lawson Jeff · CIK 0001665930 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Lawson Revocable Trust

Disclosed balance after: 38,701

F2 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F5 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $99.65 to $99.90 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F1 · ownership.nature: Erica Freeman Lawson and Jeffrey Gordon Lawson Trustees of the Lawson Revocable Trust dated 10/2/11.

SEC source: 0001447669-19-000044 · wf-form4_157688620788965.xml · nonDerivative · entry 3

Lawson Jeff · CIK 0001665930 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Lawson Revocable Trust

Disclosed balance after: 39,922

F2 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F4 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $98.65 to $99.64 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F1 · ownership.nature: Erica Freeman Lawson and Jeffrey Gordon Lawson Trustees of the Lawson Revocable Trust dated 10/2/11.

SEC source: 0001447669-19-000044 · wf-form4_157688620788965.xml · nonDerivative · entry 2

Lawson Jeff · CIK 0001665930 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Lawson Revocable Trust

Disclosed balance after: 53,863

F2 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F3 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $97.6550 to $98.6450 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F1 · ownership.nature: Erica Freeman Lawson and Jeffrey Gordon Lawson Trustees of the Lawson Revocable Trust dated 10/2/11.

SEC source: 0001447669-19-000044 · wf-form4_157688620788965.xml · nonDerivative · entry 1

Lawson Jeff · CIK 0001665930 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Lawson Revocable Trust

Disclosed balance after: 63,701

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · ownership.nature: Erica Freeman Lawson and Jeffrey Gordon Lawson Trustees of the Lawson Revocable Trust dated 10/2/11.

SEC source: 0001447669-19-000042 · wf-form4_157670895761018.xml · derivative · entry 5

DALZELL RICHARD L · CIK 0001184753 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · security: 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.

F5 · derivative.exercise_price: 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.

F5 · derivative.exercise_date: 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.

F5 · derivative.expiration_date: 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.

SEC source: 0001447669-19-000042 · wf-form4_157670895761018.xml · derivative · entry 4

DALZELL RICHARD L · CIK 0001184753 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 500

Underlying: Class A Common Stock · 500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · security: 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.

F5 · derivative.exercise_price: 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.

F5 · derivative.exercise_date: 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.

F5 · derivative.expiration_date: 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.

SEC source: 0001447669-19-000042 · wf-form4_157670895761018.xml · derivative · entry 3

DALZELL RICHARD L · CIK 0001184753 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 117,500

Underlying: Class B Common Stock · 500 shares

Expires 2024-03-24

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: The shares subject to the option vested in 36 equal installments commencing on March 25, 2014. The shares subject to the option are fully vested and exercisable by the reporting person.

F5 · derivative.underlying: 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.

SEC source: 0001447669-19-000042 · wf-form4_157670895761018.xml · nonDerivative · entry 2

DALZELL RICHARD L · CIK 0001184753 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,383

F2 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F3 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $100.00 to $100.02 per share, inclusive. The Reporting Person undertakes to provide to the Issuer,any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F1 · balance_after: A portion of these shares represent Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A common stock.

SEC source: 0001447669-19-000042 · wf-form4_157670895761018.xml · nonDerivative · entry 1

DALZELL RICHARD L · CIK 0001184753 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,883

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: A portion of these shares represent Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A common stock.

SEC source: 0001447669-20-000018 · wf-form5_158163376580401.xml · nonDerivative · entry 1

Dubinsky Donna · CIK 0001759316 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,846

F1 · kind: The shares reported in this transaction represent a bona-fide charitable gift to a Donor Advised Fund.

F2 · balance_after: A portion of these shares represent Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A common stock.

SEC source: 0001447669-19-000040 · wf-form4_157550948217000.xml · derivative · entry 4

Lawson Jeff · CIK 0001665930 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Lawson Revocable Trust

Disclosed balance after: 5,796,477

Underlying: Class A Common Stock · 119,811 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · security: 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.

F4 · derivative.exercise_price: 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.

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

F1 · ownership.nature: Erica Freeman Lawson and Jeffrey Gordon Lawson Trustees of the Lawson Revocable Trust dated 10/2/11.

SEC source: 0001447669-19-000040 · wf-form4_157550948217000.xml · nonDerivative · entry 2

Lawson Jeff · CIK 0001665930 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Lawson Revocable Trust

Disclosed balance after: 38,701

F2 · kind: The shares reported in this transaction represent a bona-fide charitable gift to a Donor Advised Fund.

F1 · ownership.nature: Erica Freeman Lawson and Jeffrey Gordon Lawson Trustees of the Lawson Revocable Trust dated 10/2/11.

SEC source: 0001447669-19-000040 · wf-form4_157550948217000.xml · nonDerivative · entry 1

Lawson Jeff · CIK 0001665930 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Lawson Revocable Trust

Disclosed balance after: 158,512

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · ownership.nature: Erica Freeman Lawson and Jeffrey Gordon Lawson Trustees of the Lawson Revocable Trust dated 10/2/11.

SEC source: 0000899243-19-028298 · doc4.xml · derivative · entry 4

Bessemer Venture Partners VII L.P. · CIK 0001534338 · Director

Deer VII & Co. Ltd. · CIK 0001540726 · Director

Deer VII & Co. L.P. · CIK 0001540731 · Director

BVP VII SPECIAL OPPORTUNITY FUND LP · CIK 0001459524 · Director

Bessemer Venture Partners VII Institutional L.P. · CIK 0001407577 · Director

15 Angels LLC · CIK 0001677269 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Class A Common Stock · 771,162 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · shares: Represents 241,975 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII L.P. ("BVP VII"), 105,864 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst"), 408,335 shares converted from Class B Common Stock to Class A Common Stock by BVP Special Opportunity Fund VII L.P. ("BVP VII SOF"), and 14,988 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels LLC ("BVP 15A" and together with BVP VII, BVP VII Inst, and BVP VII SOF, the "BVP VII Funds").

F1 · derivative.exercise_date: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F1 · derivative.expiration_date: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F3 · ownership.nature: Deer VII & Co. Ltd. ("Deer VII Ltd.") is the general partner of Deer VII & Co. L.P. ("Deer VII L.P." and, together with the BVP VII Funds and Deer VII Ltd., the "BVP VII Entities"), which is the general partner of each of BVP VII, BVP VII Inst and BVP VII SOF. BVP 15A is a wholly-owned subsidiary of BVP VII Inst. Deer VII Ltd. and Deer VII L.P. disclaim beneficial ownership of the securities held by the BVP VII Funds, and this report shall not be deemed an admission that Deer VII Ltd. and Deer VII L.P. are the beneficial owners of such securities, except to the extent of their pecuniary interest therein, if any, by virtue of their direct and indirect general partner interests in the BVP VII Funds.

F4 · ownership.nature: Byron Deeter is a director of Twilio Inc. ("Twilio"). Mr. Deeter also is a director of Deer VII Ltd. Mr. Deeter also is a director of Deer VIII & Co. Ltd. ("Deer VIII Ltd."), which is the general partner of Deer VIII & Co. L.P. ("Deer VIII L.P."), which is the general partner of Bessemer Venture Partners VIII Institutional L.P. ("BVP VIII Inst") and Bessemer Venture Partners VIII L.P. ("BVP VIII" and, together with BVP VIII Inst, Deer VIII Ltd. and Deer VIII L.P., the "BVP VIII Entities"). Mr. Deeter serves as a representative of the BVP VII Entities and the BVP VIII Entities on the Board of Directors of Twilio.

SEC source: 0000899243-19-028298 · doc4.xml · nonDerivative · entry 3

Bessemer Venture Partners VII L.P. · CIK 0001534338 · Director

Deer VII & Co. Ltd. · CIK 0001540726 · Director

Deer VII & Co. L.P. · CIK 0001540731 · Director

BVP VII SPECIAL OPPORTUNITY FUND LP · CIK 0001459524 · Director

Bessemer Venture Partners VII Institutional L.P. · CIK 0001407577 · Director

15 Angels LLC · CIK 0001677269 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F7 · shares: On November 26, 2019 BVP VII, BVP VII Inst, BVP VII SOF, and BVP 15A sold 2,323, 1,016, 3,920, and 143 shares, respectively of Class A Common Stock of Twilio (the "Sold Shares"). The Sold Shares were sold in multiple executions at a price per share ranging from $103.05 to $103.18, with an average execution price per share of $103.11. Each of the BVP VII Funds hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such individual executions.

F7 · price: On November 26, 2019 BVP VII, BVP VII Inst, BVP VII SOF, and BVP 15A sold 2,323, 1,016, 3,920, and 143 shares, respectively of Class A Common Stock of Twilio (the "Sold Shares"). The Sold Shares were sold in multiple executions at a price per share ranging from $103.05 to $103.18, with an average execution price per share of $103.11. Each of the BVP VII Funds hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such individual executions.

F3 · ownership.nature: Deer VII & Co. Ltd. ("Deer VII Ltd.") is the general partner of Deer VII & Co. L.P. ("Deer VII L.P." and, together with the BVP VII Funds and Deer VII Ltd., the "BVP VII Entities"), which is the general partner of each of BVP VII, BVP VII Inst and BVP VII SOF. BVP 15A is a wholly-owned subsidiary of BVP VII Inst. Deer VII Ltd. and Deer VII L.P. disclaim beneficial ownership of the securities held by the BVP VII Funds, and this report shall not be deemed an admission that Deer VII Ltd. and Deer VII L.P. are the beneficial owners of such securities, except to the extent of their pecuniary interest therein, if any, by virtue of their direct and indirect general partner interests in the BVP VII Funds.

F4 · ownership.nature: Byron Deeter is a director of Twilio Inc. ("Twilio"). Mr. Deeter also is a director of Deer VII Ltd. Mr. Deeter also is a director of Deer VIII & Co. Ltd. ("Deer VIII Ltd."), which is the general partner of Deer VIII & Co. L.P. ("Deer VIII L.P."), which is the general partner of Bessemer Venture Partners VIII Institutional L.P. ("BVP VIII Inst") and Bessemer Venture Partners VIII L.P. ("BVP VIII" and, together with BVP VIII Inst, Deer VIII Ltd. and Deer VIII L.P., the "BVP VIII Entities"). Mr. Deeter serves as a representative of the BVP VII Entities and the BVP VIII Entities on the Board of Directors of Twilio.

SEC source: 0000899243-19-028298 · doc4.xml · nonDerivative · entry 2

Bessemer Venture Partners VII L.P. · CIK 0001534338 · Director

Deer VII & Co. Ltd. · CIK 0001540726 · Director

Deer VII & Co. L.P. · CIK 0001540731 · Director

BVP VII SPECIAL OPPORTUNITY FUND LP · CIK 0001459524 · Director

Bessemer Venture Partners VII Institutional L.P. · CIK 0001407577 · Director

15 Angels LLC · CIK 0001677269 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 7,402

F5 · kind: On November 26, 2019, BVP VII, BVP VII Inst, BVP VII SOF, and BVP 15A distributed, for no consideration, 239,652, 104,848, 404,415, and 14,845 shares (collectively, the "Shares"), respectively, of Class A Common Stock to their limited partners and to Deer VII L.P., representing each such partner's pro rata interest in such Shares. On the same date, one or more of such limited partner(s) distributed, for no consideration, the Shares to certain of its or their members in an amount equal to each such member's or members' respective pro rata interests in the Shares. Finally, on the same date, Deer VII L.P. distributed, for no consideration, the Shares it received from the distributions to its partners in an amount equal to each such partner's pro rata interest in the Shares. All of the aforementioned distributions were made in accordance with the exemption afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F5 · shares: On November 26, 2019, BVP VII, BVP VII Inst, BVP VII SOF, and BVP 15A distributed, for no consideration, 239,652, 104,848, 404,415, and 14,845 shares (collectively, the "Shares"), respectively, of Class A Common Stock to their limited partners and to Deer VII L.P., representing each such partner's pro rata interest in such Shares. On the same date, one or more of such limited partner(s) distributed, for no consideration, the Shares to certain of its or their members in an amount equal to each such member's or members' respective pro rata interests in the Shares. Finally, on the same date, Deer VII L.P. distributed, for no consideration, the Shares it received from the distributions to its partners in an amount equal to each such partner's pro rata interest in the Shares. All of the aforementioned distributions were made in accordance with the exemption afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F5 · price: On November 26, 2019, BVP VII, BVP VII Inst, BVP VII SOF, and BVP 15A distributed, for no consideration, 239,652, 104,848, 404,415, and 14,845 shares (collectively, the "Shares"), respectively, of Class A Common Stock to their limited partners and to Deer VII L.P., representing each such partner's pro rata interest in such Shares. On the same date, one or more of such limited partner(s) distributed, for no consideration, the Shares to certain of its or their members in an amount equal to each such member's or members' respective pro rata interests in the Shares. Finally, on the same date, Deer VII L.P. distributed, for no consideration, the Shares it received from the distributions to its partners in an amount equal to each such partner's pro rata interest in the Shares. All of the aforementioned distributions were made in accordance with the exemption afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F6 · balance_after: After the distribution, 2,323 shares of Class A Common Stock were held by BVP VII, 1,016 shares of Class A Common Stock were held by BVP VII Inst, 3,920 shares of Class A Common Stock were held by BVP VII SOF and 143 shares of Class A Common Stock were held by BVP 15A

F3 · ownership.nature: Deer VII & Co. Ltd. ("Deer VII Ltd.") is the general partner of Deer VII & Co. L.P. ("Deer VII L.P." and, together with the BVP VII Funds and Deer VII Ltd., the "BVP VII Entities"), which is the general partner of each of BVP VII, BVP VII Inst and BVP VII SOF. BVP 15A is a wholly-owned subsidiary of BVP VII Inst. Deer VII Ltd. and Deer VII L.P. disclaim beneficial ownership of the securities held by the BVP VII Funds, and this report shall not be deemed an admission that Deer VII Ltd. and Deer VII L.P. are the beneficial owners of such securities, except to the extent of their pecuniary interest therein, if any, by virtue of their direct and indirect general partner interests in the BVP VII Funds.

F4 · ownership.nature: Byron Deeter is a director of Twilio Inc. ("Twilio"). Mr. Deeter also is a director of Deer VII Ltd. Mr. Deeter also is a director of Deer VIII & Co. Ltd. ("Deer VIII Ltd."), which is the general partner of Deer VIII & Co. L.P. ("Deer VIII L.P."), which is the general partner of Bessemer Venture Partners VIII Institutional L.P. ("BVP VIII Inst") and Bessemer Venture Partners VIII L.P. ("BVP VIII" and, together with BVP VIII Inst, Deer VIII Ltd. and Deer VIII L.P., the "BVP VIII Entities"). Mr. Deeter serves as a representative of the BVP VII Entities and the BVP VIII Entities on the Board of Directors of Twilio.

F6 · ownership.nature: After the distribution, 2,323 shares of Class A Common Stock were held by BVP VII, 1,016 shares of Class A Common Stock were held by BVP VII Inst, 3,920 shares of Class A Common Stock were held by BVP VII SOF and 143 shares of Class A Common Stock were held by BVP 15A

SEC source: 0000899243-19-028298 · doc4.xml · nonDerivative · entry 1

Bessemer Venture Partners VII L.P. · CIK 0001534338 · Director

Deer VII & Co. Ltd. · CIK 0001540726 · Director

Deer VII & Co. L.P. · CIK 0001540731 · Director

BVP VII SPECIAL OPPORTUNITY FUND LP · CIK 0001459524 · Director

Bessemer Venture Partners VII Institutional L.P. · CIK 0001407577 · Director

15 Angels LLC · CIK 0001677269 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 771,162

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · shares: Represents 241,975 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII L.P. ("BVP VII"), 105,864 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst"), 408,335 shares converted from Class B Common Stock to Class A Common Stock by BVP Special Opportunity Fund VII L.P. ("BVP VII SOF"), and 14,988 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels LLC ("BVP 15A" and together with BVP VII, BVP VII Inst, and BVP VII SOF, the "BVP VII Funds").

F1 · price: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · balance_after: Represents 241,975 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII L.P. ("BVP VII"), 105,864 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst"), 408,335 shares converted from Class B Common Stock to Class A Common Stock by BVP Special Opportunity Fund VII L.P. ("BVP VII SOF"), and 14,988 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels LLC ("BVP 15A" and together with BVP VII, BVP VII Inst, and BVP VII SOF, the "BVP VII Funds").

F2 · ownership.nature: Represents 241,975 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII L.P. ("BVP VII"), 105,864 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst"), 408,335 shares converted from Class B Common Stock to Class A Common Stock by BVP Special Opportunity Fund VII L.P. ("BVP VII SOF"), and 14,988 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels LLC ("BVP 15A" and together with BVP VII, BVP VII Inst, and BVP VII SOF, the "BVP VII Funds").

F3 · ownership.nature: Deer VII & Co. Ltd. ("Deer VII Ltd.") is the general partner of Deer VII & Co. L.P. ("Deer VII L.P." and, together with the BVP VII Funds and Deer VII Ltd., the "BVP VII Entities"), which is the general partner of each of BVP VII, BVP VII Inst and BVP VII SOF. BVP 15A is a wholly-owned subsidiary of BVP VII Inst. Deer VII Ltd. and Deer VII L.P. disclaim beneficial ownership of the securities held by the BVP VII Funds, and this report shall not be deemed an admission that Deer VII Ltd. and Deer VII L.P. are the beneficial owners of such securities, except to the extent of their pecuniary interest therein, if any, by virtue of their direct and indirect general partner interests in the BVP VII Funds.

F4 · ownership.nature: Byron Deeter is a director of Twilio Inc. ("Twilio"). Mr. Deeter also is a director of Deer VII Ltd. Mr. Deeter also is a director of Deer VIII & Co. Ltd. ("Deer VIII Ltd."), which is the general partner of Deer VIII & Co. L.P. ("Deer VIII L.P."), which is the general partner of Bessemer Venture Partners VIII Institutional L.P. ("BVP VIII Inst") and Bessemer Venture Partners VIII L.P. ("BVP VIII" and, together with BVP VIII Inst, Deer VIII Ltd. and Deer VIII L.P., the "BVP VIII Entities"). Mr. Deeter serves as a representative of the BVP VII Entities and the BVP VIII Entities on the Board of Directors of Twilio.

SEC source: 0000899243-19-028297 · doc4.xml · nonDerivative · entry 2

Deeter Byron B · CIK 0001506450 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

F2 · shares: On November 26, 2019 Bessemer Venture Partners VIII Institutional L.P. ("BVP VIII Inst") and Bessemer Venture Partners VIII L.P. ("BVP VIII", and together with BVP VIII Inst, the "BVP VIII Funds") sold 1,678 and 2,018 shares, respectively, of Class A Common Stock of Twilio (the "BVP VIII Fund Shares"). The BVP VIII Fund Shares were sold in multiple executions at a price per share ranging from $103.05 to $103.18, with an average execution price per share of $103.11. Each of the BVP VIII Funds hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such individual executions. After the reported transaction, none of the BVP VIII Funds held any shares of Class A Common Stock of the Issuer.

F2 · price: On November 26, 2019 Bessemer Venture Partners VIII Institutional L.P. ("BVP VIII Inst") and Bessemer Venture Partners VIII L.P. ("BVP VIII", and together with BVP VIII Inst, the "BVP VIII Funds") sold 1,678 and 2,018 shares, respectively, of Class A Common Stock of Twilio (the "BVP VIII Fund Shares"). The BVP VIII Fund Shares were sold in multiple executions at a price per share ranging from $103.05 to $103.18, with an average execution price per share of $103.11. Each of the BVP VIII Funds hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such individual executions. After the reported transaction, none of the BVP VIII Funds held any shares of Class A Common Stock of the Issuer.

F2 · acquired: On November 26, 2019 Bessemer Venture Partners VIII Institutional L.P. ("BVP VIII Inst") and Bessemer Venture Partners VIII L.P. ("BVP VIII", and together with BVP VIII Inst, the "BVP VIII Funds") sold 1,678 and 2,018 shares, respectively, of Class A Common Stock of Twilio (the "BVP VIII Fund Shares"). The BVP VIII Fund Shares were sold in multiple executions at a price per share ranging from $103.05 to $103.18, with an average execution price per share of $103.11. Each of the BVP VIII Funds hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such individual executions. After the reported transaction, none of the BVP VIII Funds held any shares of Class A Common Stock of the Issuer.

F1 · balance_after: On November 26, 2019 Bessemer Venture Partners VII L.P. ("BVP VII"), Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst") BVP Special Opportunity Fund VII L.P. ("BVP VII SOF"), and 15 Angels LLC ("BVP 15A" and together with BVP VII, BVP VII Inst, and BVP VII SOF, the "BVP VII Funds") sold 2,323, 1,016, 3,920, and 143 shares, respectively, of Class A Common Stock of Twilio (the "BVP VII Fund Shares"). The BVP VII Fund Shares were sold in multiple executions at a price per share ranging from $103.05 to $103.18, with an average execution price per share of $103.11. Each of the BVP VII Funds hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such individual executions. After the reported transaction, none of the BVP VII Funds held any shares of Class A Common Stock of the Issuer.

F3 · ownership.nature: Byron Deeter is a director of Twilio and is a director of Deer VIII Ltd. Mr. Deeter also is a director of Deer VII & Co. Ltd. ("Deer VII Ltd."), which is the general partner of Deer VII LP, which is the general partner of the BVP VII Funds (together with Deer VII Ltd. and Deer VII LP, the "BVP VII Entities"). Mr. Deeter serves as a representative of the BVP VII Entities and the BVP VIII Entities on the Board of Directors of Twilio. Mr. Deeter disclaims beneficial ownership of the securities held by the BVP VIII Funds and BVP VII 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 such securities by virtue of his interest in Deer VIII Ltd, his interest in Deer VIII LP, his indirect limited partnership interest in the BVP VIII Funds, his interest in Deer VII Ltd, his interest in Deer VII LP and his indirect limited partnership interest in the BVP VII Funds

F4 · ownership.nature: Deer VII Ltd. and Deer VII LP disclaim beneficial ownership of the securities held by the BVP VII Funds, and this report shall not be deemed an admission that Deer VII Ltd. and Deer VII LP are the beneficial owners of such securities, except to the extent of their pecuniary interest therein, if any, by virtue of their direct and indirect general partner interests in the BVP VII Funds.

SEC source: 0000899243-19-028297 · doc4.xml · nonDerivative · entry 1

Deeter Byron B · CIK 0001506450 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

F1 · shares: On November 26, 2019 Bessemer Venture Partners VII L.P. ("BVP VII"), Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst") BVP Special Opportunity Fund VII L.P. ("BVP VII SOF"), and 15 Angels LLC ("BVP 15A" and together with BVP VII, BVP VII Inst, and BVP VII SOF, the "BVP VII Funds") sold 2,323, 1,016, 3,920, and 143 shares, respectively, of Class A Common Stock of Twilio (the "BVP VII Fund Shares"). The BVP VII Fund Shares were sold in multiple executions at a price per share ranging from $103.05 to $103.18, with an average execution price per share of $103.11. Each of the BVP VII Funds hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such individual executions. After the reported transaction, none of the BVP VII Funds held any shares of Class A Common Stock of the Issuer.

F1 · price: On November 26, 2019 Bessemer Venture Partners VII L.P. ("BVP VII"), Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst") BVP Special Opportunity Fund VII L.P. ("BVP VII SOF"), and 15 Angels LLC ("BVP 15A" and together with BVP VII, BVP VII Inst, and BVP VII SOF, the "BVP VII Funds") sold 2,323, 1,016, 3,920, and 143 shares, respectively, of Class A Common Stock of Twilio (the "BVP VII Fund Shares"). The BVP VII Fund Shares were sold in multiple executions at a price per share ranging from $103.05 to $103.18, with an average execution price per share of $103.11. Each of the BVP VII Funds hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such individual executions. After the reported transaction, none of the BVP VII Funds held any shares of Class A Common Stock of the Issuer.

F1 · acquired: On November 26, 2019 Bessemer Venture Partners VII L.P. ("BVP VII"), Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst") BVP Special Opportunity Fund VII L.P. ("BVP VII SOF"), and 15 Angels LLC ("BVP 15A" and together with BVP VII, BVP VII Inst, and BVP VII SOF, the "BVP VII Funds") sold 2,323, 1,016, 3,920, and 143 shares, respectively, of Class A Common Stock of Twilio (the "BVP VII Fund Shares"). The BVP VII Fund Shares were sold in multiple executions at a price per share ranging from $103.05 to $103.18, with an average execution price per share of $103.11. Each of the BVP VII Funds hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such individual executions. After the reported transaction, none of the BVP VII Funds held any shares of Class A Common Stock of the Issuer.

F1 · balance_after: On November 26, 2019 Bessemer Venture Partners VII L.P. ("BVP VII"), Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst") BVP Special Opportunity Fund VII L.P. ("BVP VII SOF"), and 15 Angels LLC ("BVP 15A" and together with BVP VII, BVP VII Inst, and BVP VII SOF, the "BVP VII Funds") sold 2,323, 1,016, 3,920, and 143 shares, respectively, of Class A Common Stock of Twilio (the "BVP VII Fund Shares"). The BVP VII Fund Shares were sold in multiple executions at a price per share ranging from $103.05 to $103.18, with an average execution price per share of $103.11. Each of the BVP VII Funds hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such individual executions. After the reported transaction, none of the BVP VII Funds held any shares of Class A Common Stock of the Issuer.

F3 · ownership.nature: Byron Deeter is a director of Twilio and is a director of Deer VIII Ltd. Mr. Deeter also is a director of Deer VII & Co. Ltd. ("Deer VII Ltd."), which is the general partner of Deer VII LP, which is the general partner of the BVP VII Funds (together with Deer VII Ltd. and Deer VII LP, the "BVP VII Entities"). Mr. Deeter serves as a representative of the BVP VII Entities and the BVP VIII Entities on the Board of Directors of Twilio. Mr. Deeter disclaims beneficial ownership of the securities held by the BVP VIII Funds and BVP VII 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 such securities by virtue of his interest in Deer VIII Ltd, his interest in Deer VIII LP, his indirect limited partnership interest in the BVP VIII Funds, his interest in Deer VII Ltd, his interest in Deer VII LP and his indirect limited partnership interest in the BVP VII Funds

F4 · ownership.nature: Deer VII Ltd. and Deer VII LP disclaim beneficial ownership of the securities held by the BVP VII Funds, and this report shall not be deemed an admission that Deer VII Ltd. and Deer VII LP are the beneficial owners of such securities, except to the extent of their pecuniary interest therein, if any, by virtue of their direct and indirect general partner interests in the BVP VII Funds.

SEC source: 0000899243-19-028296 · doc4.xml · nonDerivative · entry 2

Bessemer Venture Partners VIII L.P. · CIK 0001508900 · Director

Bessemer Venture Partners VIII Institutional L.P. · CIK 0001508902 · Director

Deer VIII & Co. L.P. · CIK 0001559306 · Director

Deer VIII & Co. Ltd. · CIK 0001559311 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

F6 · shares: On November 26, 2019 BVP VIII and BVP VIII Inst sold 1,678 and 2,018 shares, respectively of Class A Common Stock of Twilio (the "Sold Shares"). The Sold Shares were sold in multiple executions at a price per share ranging from $103.05 to $103.18, with an average execution price per share of $103.11. Each of the BVP VIII Funds hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such individual executions.

F6 · price: On November 26, 2019 BVP VIII and BVP VIII Inst sold 1,678 and 2,018 shares, respectively of Class A Common Stock of Twilio (the "Sold Shares"). The Sold Shares were sold in multiple executions at a price per share ranging from $103.05 to $103.18, with an average execution price per share of $103.11. Each of the BVP VIII Funds hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such individual executions.

F4 · ownership.nature: Deer VIII & Co. Ltd. ("Deer VIII Ltd.") is the general partner of Deer VIII L.P. and (Deer VIII L.P., Deer VIII Ltd. and the BVP VIII Funds are collectively referred to as the "BVP VIII Entities"), which is the general partner of the BVP VIII Funds. Deer VIII Ltd. and Deer VIII L.P. disclaim beneficial ownership of the securities held by the BVP VIII Funds, and this report shall not be deemed an admission that Deer VIII Ltd. and Deer VIII L.P. are the beneficial owners of such securities, except to the extent of their pecuniary interest therein, if any, by virtue of their direct and indirect general partner interests in the BVP VIII Funds.

F5 · ownership.nature: Byron Deeter is a director of Twilio and is a director of Deer VIII Ltd. Mr. Deeter also is a director of Deer VII & Co. Ltd. ("Deer VII Ltd."), which is the general partner of Deer VII & Co. L.P. ("Deer VII L.P."), which is the general partner of Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst"), BVP VII Special Opportunity Fund L.P. ("BVP VII SOF") and Bessemer Venture Partners VII L.P. ("BVP VII" and together with BVP VII Inst, BVP VII SOF and 15 Angels LLC, a wholly-owned subsidiary of BVP VII, collectively, the "BVP VII Funds" and, together with Deer VII Ltd. and Deer VII L.P., the "BVP VII Entities"). Mr. Deeter serves as a representative of the BVP VII Entities and the BVP VIII Entities on the Board of Directors of Twilio.

SEC source: 0000899243-19-028296 · doc4.xml · nonDerivative · entry 1

Bessemer Venture Partners VIII L.P. · CIK 0001508900 · Director

Bessemer Venture Partners VIII Institutional L.P. · CIK 0001508902 · Director

Deer VIII & Co. L.P. · CIK 0001559306 · Director

Deer VIII & Co. Ltd. · CIK 0001559311 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 3,696

F1 · kind: On November 26, 2019, Bessemer Venture Partners VIII Institutional L.P. ("BVP VIII Inst") and Bessemer Venture Partners VIII L.P. ("BVP VIII", and together with BVP VIII Inst, the "BVP VIII Funds") distributed, for no consideration, 208,152, and 173,079 shares (collectively, the "Shares"), respectively, of Class A Common Stock to their limited partners and to Deer VIII & Co. L.P. ("Deer VIII L.P."), representing each such partner's pro rata interest in such Shares. On the same date, one or more of such limited partner(s) distributed, for no consideration, the Shares to certain of its or their members in an amount equal to each such member's or members' respective pro rata interests in the Shares. Finally, on the same date, Deer VIII L.P. distributed, for no consideration, the Shares it received from the distributions to its partners in an amount equal to each such partner's pro rata interest in the Shares.

F2 · kind: (continued from footnote 1) All of the aforementioned distributions were made in accordance with the exemption afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F1 · shares: On November 26, 2019, Bessemer Venture Partners VIII Institutional L.P. ("BVP VIII Inst") and Bessemer Venture Partners VIII L.P. ("BVP VIII", and together with BVP VIII Inst, the "BVP VIII Funds") distributed, for no consideration, 208,152, and 173,079 shares (collectively, the "Shares"), respectively, of Class A Common Stock to their limited partners and to Deer VIII & Co. L.P. ("Deer VIII L.P."), representing each such partner's pro rata interest in such Shares. On the same date, one or more of such limited partner(s) distributed, for no consideration, the Shares to certain of its or their members in an amount equal to each such member's or members' respective pro rata interests in the Shares. Finally, on the same date, Deer VIII L.P. distributed, for no consideration, the Shares it received from the distributions to its partners in an amount equal to each such partner's pro rata interest in the Shares.

F2 · shares: (continued from footnote 1) All of the aforementioned distributions were made in accordance with the exemption afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F1 · price: On November 26, 2019, Bessemer Venture Partners VIII Institutional L.P. ("BVP VIII Inst") and Bessemer Venture Partners VIII L.P. ("BVP VIII", and together with BVP VIII Inst, the "BVP VIII Funds") distributed, for no consideration, 208,152, and 173,079 shares (collectively, the "Shares"), respectively, of Class A Common Stock to their limited partners and to Deer VIII & Co. L.P. ("Deer VIII L.P."), representing each such partner's pro rata interest in such Shares. On the same date, one or more of such limited partner(s) distributed, for no consideration, the Shares to certain of its or their members in an amount equal to each such member's or members' respective pro rata interests in the Shares. Finally, on the same date, Deer VIII L.P. distributed, for no consideration, the Shares it received from the distributions to its partners in an amount equal to each such partner's pro rata interest in the Shares.

F2 · price: (continued from footnote 1) All of the aforementioned distributions were made in accordance with the exemption afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F3 · balance_after: After the distribution, 1,678 shares of Class A Common Stock were held by BVP VIII, and 2,018 shares of Class A Common Stock were held by BVP VIII Inst.

F3 · ownership.nature: After the distribution, 1,678 shares of Class A Common Stock were held by BVP VIII, and 2,018 shares of Class A Common Stock were held by BVP VIII Inst.

F4 · ownership.nature: Deer VIII & Co. Ltd. ("Deer VIII Ltd.") is the general partner of Deer VIII L.P. and (Deer VIII L.P., Deer VIII Ltd. and the BVP VIII Funds are collectively referred to as the "BVP VIII Entities"), which is the general partner of the BVP VIII Funds. Deer VIII Ltd. and Deer VIII L.P. disclaim beneficial ownership of the securities held by the BVP VIII Funds, and this report shall not be deemed an admission that Deer VIII Ltd. and Deer VIII L.P. are the beneficial owners of such securities, except to the extent of their pecuniary interest therein, if any, by virtue of their direct and indirect general partner interests in the BVP VIII Funds.

F5 · ownership.nature: Byron Deeter is a director of Twilio and is a director of Deer VIII Ltd. Mr. Deeter also is a director of Deer VII & Co. Ltd. ("Deer VII Ltd."), which is the general partner of Deer VII & Co. L.P. ("Deer VII L.P."), which is the general partner of Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst"), BVP VII Special Opportunity Fund L.P. ("BVP VII SOF") and Bessemer Venture Partners VII L.P. ("BVP VII" and together with BVP VII Inst, BVP VII SOF and 15 Angels LLC, a wholly-owned subsidiary of BVP VII, collectively, the "BVP VII Funds" and, together with Deer VII Ltd. and Deer VII L.P., the "BVP VII Entities"). Mr. Deeter serves as a representative of the BVP VII Entities and the BVP VIII Entities on the Board of Directors of Twilio.

SEC source: 0001447669-19-000034 · wf-form4_157446418210934.xml · derivative · entry 14

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,880

Underlying: Class A Common Stock · 13,450 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F9 · security: 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.

F9 · derivative.exercise_price: 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.

F9 · derivative.exercise_date: 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.

F9 · derivative.expiration_date: 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.

F10 · balance_after: A portion of these shares represent RSUs. Each RSU represents the contingent right to receive one share of the Issuer's Class B common stock.

SEC source: 0001447669-19-000034 · wf-form4_157446418210934.xml · derivative · entry 13

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,638

Underlying: Class A Common Stock · 1,282 shares

Expires 2028-02-19

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F13 · derivative.exercise_date: The shares subject to this option vest in 48 equal monthly installments, with the first installment on March 15, 2018, subject to the Reporting Person's continued service to the Issuer through each vesting date.

SEC source: 0001447669-19-000034 · wf-form4_157446418210934.xml · derivative · entry 12

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,209

Underlying: Class A Common Stock · 1,229 shares

Expires 2027-02-09

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F12 · derivative.exercise_date: This option shall vest as follows: 1/4th of the option shall vest on January 1, 2018 and 1/48th of the option shall vest monthly thereafter, subject to the Reporting Person's continued service to the Issuer through each vesting date.

SEC source: 0001447669-19-000034 · wf-form4_157446418210934.xml · derivative · entry 11

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,330

Underlying: Class A Common Stock · 1,047 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F9 · security: 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.

F9 · derivative.exercise_price: 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.

F9 · derivative.exercise_date: 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.

F9 · derivative.expiration_date: 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.

F10 · balance_after: A portion of these shares represent RSUs. Each RSU represents the contingent right to receive one share of the Issuer's Class B common stock.

SEC source: 0001447669-19-000034 · wf-form4_157446418210934.xml · derivative · entry 10

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,003

Underlying: Class B Common Stock · 1,047 shares

Expires 2025-12-30

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F11 · derivative.exercise_date: The shares subject to this option vest in 48 equal monthly installments, with the first installment on February 15, 2016, subject to the Reporting Person's continuous service to the Issuer through each vesting date. The option is early exercisable by the Reporting Person.

F9 · derivative.underlying: 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.

SEC source: 0001447669-19-000034 · wf-form4_157446418210934.xml · derivative · entry 9

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,283

Underlying: Class A Common Stock · 12,403 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F9 · security: 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.

F9 · derivative.exercise_price: 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.

F9 · derivative.exercise_date: 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.

F9 · derivative.expiration_date: 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.

F10 · balance_after: A portion of these shares represent RSUs. Each RSU represents the contingent right to receive one share of the Issuer's Class B common stock.

SEC source: 0001447669-19-000034 · wf-form4_157446418210934.xml · derivative · entry 8

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 28,312

Underlying: Class B Common Stock · 12,403 shares

Expires 2024-10-28

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F8 · derivative.exercise_date: This stock option grant became fully vested on September 2, 2018.

F9 · derivative.underlying: 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.

SEC source: 0001447669-19-000034 · wf-form4_157446418210934.xml · nonDerivative · entry 7

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Indirect · By The Karyn Smith Revocable Trust

Disclosed balance after: 2,821

F2 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F6 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.10 to $105.52 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F7 · ownership.nature: The Karyn Smith Revocable Trust U/A/D 9/15/06 Amended 12/23/11, Karyn Smith Trustee.

SEC source: 0001447669-19-000034 · wf-form4_157446418210934.xml · nonDerivative · entry 6

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,599

F2 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F5 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.80 to $105.10 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F1 · balance_after: A portion of these shares represent Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A common stock.

SEC source: 0001447669-19-000034 · wf-form4_157446418210934.xml · nonDerivative · entry 5

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,885

F2 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F4 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $103.80 to $104.78 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F1 · balance_after: A portion of these shares represent Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A common stock.

SEC source: 0001447669-19-000034 · wf-form4_157446418210934.xml · nonDerivative · entry 4

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,318

F2 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F3 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $102.80 to $103.77 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F1 · balance_after: A portion of these shares represent Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A common stock.

SEC source: 0001447669-19-000034 · wf-form4_157446418210934.xml · nonDerivative · entry 3

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 55,560

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: A portion of these shares represent Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A common stock.

SEC source: 0001447669-19-000034 · wf-form4_157446418210934.xml · nonDerivative · entry 2

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 54,278

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: A portion of these shares represent Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A common stock.

SEC source: 0001447669-19-000034 · wf-form4_157446418210934.xml · nonDerivative · entry 1

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 53,049

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: A portion of these shares represent Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A common stock.

SEC source: 0001447669-19-000036 · wf-form4_157446429882919.xml · nonDerivative · entry 3

Shipchandler Khozema · CIK 0001737610 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 83,163

F1 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F5 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.69 to $105.45 per share, inclusive. The Reporting Person undertakes to provide to the Issuer,any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · balance_after: A portion of these shares represent Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A common stock.

SEC source: 0001447669-19-000036 · wf-form4_157446429882919.xml · nonDerivative · entry 2

Shipchandler Khozema · CIK 0001737610 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 88,495

F1 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F4 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $103.69 to $104.66 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · balance_after: A portion of these shares represent Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A common stock.

SEC source: 0001447669-19-000036 · wf-form4_157446429882919.xml · nonDerivative · entry 1

Shipchandler Khozema · CIK 0001737610 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 95,710

F1 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F2 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $102.67 to $103.66 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · balance_after: A portion of these shares represent Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A common stock.

SEC source: 0001447669-19-000038 · wf-form4_157446442121306.xml · nonDerivative · entry 3

Hu George · CIK 0001386396 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 153,041

F1 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F5 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.76 to $105.48 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · balance_after: A portion of these shares represent Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A common stock.

SEC source: 0001447669-19-000038 · wf-form4_157446442121306.xml · nonDerivative · entry 2

Hu George · CIK 0001386396 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 155,294

F1 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F4 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $103.76 to $104.71 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · balance_after: A portion of these shares represent Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A common stock.

SEC source: 0001447669-19-000038 · wf-form4_157446442121306.xml · nonDerivative · entry 1

Hu George · CIK 0001386396 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 159,231

F1 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F2 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $102.71 to $103.69 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · balance_after: A portion of these shares represent Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A common stock.

SEC source: 0000899243-19-027814 · doc4.xml · nonDerivative · entry 1

Deeter Byron B · CIK 0001506450 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 472,696

F1 · shares: On November 19, 2019 the Byron B. Deeter and Allison K. Deeter Trustees UTD July 28, 2000 (the "Deeter Trust") sold 30,000 shares of Class A Common Stock of Twilio (the "Shares"). The Shares were sold in multiple executions at a price per share ranging from $102.68 to $103.25, with an average execution price per share of $102.91. The Reporting Person hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such individual executions.

F1 · price: On November 19, 2019 the Byron B. Deeter and Allison K. Deeter Trustees UTD July 28, 2000 (the "Deeter Trust") sold 30,000 shares of Class A Common Stock of Twilio (the "Shares"). The Shares were sold in multiple executions at a price per share ranging from $102.68 to $103.25, with an average execution price per share of $102.91. The Reporting Person hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such individual executions.

F2 · balance_after: Includes 37,124 shares of Class A Common Stock received by the Deeter Trust in one or more pro rata distributions-in-kind from Bessemer Venture Partners VIII Institutional L.P. ("BVP VIII Inst"), Bessemer Venture Partners VIII L.P. ("BVP VIII" and together with BVP VIII Inst, the "BVP VIII Funds"), Bessemer Venture Partners VII L.P. ("BVP VII"), Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst"), BVP Special Opportunity Fund VII L.P. ("BVP VII SOF"), 15 Angels LLC ("BVP 15A"), Deer VII & Co. L.P. ("Deer VII LP") and Deer VIII & Co. L.P. ("Deer VIII LP") on August 6, 2019, which distributions were made in accordance with the exemption afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F3 · ownership.nature: These shares are held by the Deeter Trust.

SEC source: 0001127602-19-033299 · form4.xml · derivative · entry 9

Lawson Jeff · CIK 0001665930 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Lawson Revocable Trust

Disclosed balance after: 5,916,288

Underlying: Class A Common Stock · 35,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F11 · security: 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.

F11 · derivative.exercise_price: 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.

F11 · derivative.exercise_date: 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.

F11 · derivative.expiration_date: 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.

F5 · ownership.nature: Erica Freeman Lawson and Jeffrey Gordon Lawson Trustees of the Lawson Revocable Trust dated 10/2/11.

SEC source: 0001127602-19-033299 · form4.xml · nonDerivative · entry 8

Lawson Jeff · CIK 0001665930 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Lawson Revocable Trust

Disclosed balance after: 38,701

F6 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F10 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $101.77 to $102.54 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F5 · ownership.nature: Erica Freeman Lawson and Jeffrey Gordon Lawson Trustees of the Lawson Revocable Trust dated 10/2/11.

SEC source: 0001127602-19-033299 · form4.xml · nonDerivative · entry 7

Lawson Jeff · CIK 0001665930 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Lawson Revocable Trust

Disclosed balance after: 43,996

F6 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F9 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $100.75 to $101.73 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F5 · ownership.nature: Erica Freeman Lawson and Jeffrey Gordon Lawson Trustees of the Lawson Revocable Trust dated 10/2/11.

SEC source: 0001127602-19-033299 · form4.xml · nonDerivative · entry 6

Lawson Jeff · CIK 0001665930 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Lawson Revocable Trust

Disclosed balance after: 52,145

F6 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F8 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $99.75 to $100.74 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F5 · ownership.nature: Erica Freeman Lawson and Jeffrey Gordon Lawson Trustees of the Lawson Revocable Trust dated 10/2/11.

SEC source: 0001127602-19-033299 · form4.xml · nonDerivative · entry 5

Lawson Jeff · CIK 0001665930 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Lawson Revocable Trust

Disclosed balance after: 70,659

F6 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person.

F7 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $98.69 to $99.62 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F5 · ownership.nature: Erica Freeman Lawson and Jeffrey Gordon Lawson Trustees of the Lawson Revocable Trust dated 10/2/11.