TWLO

SEC source: 0001127602-19-027281 · form4.xml · nonDerivative · entry 9

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Indirect · By The Karyn Smith Revocable Trust

Disclosed balance after: 3,678

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 $125.80 to $126.78 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.

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

SEC source: 0001127602-19-027281 · form4.xml · nonDerivative · entry 8

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Indirect · By The Karyn Smith Revocable Trust

Disclosed balance after: 4,306

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 $124.77 to $125.75 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: 0001127602-19-027281 · form4.xml · nonDerivative · entry 7

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,487

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 $128.00 to $128.05 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: 0001127602-19-027281 · form4.xml · nonDerivative · entry 6

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,760

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 $126.82 to $127.78 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: 0001127602-19-027281 · form4.xml · nonDerivative · entry 5

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 52,342

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 $125.80 to $126.78 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: 0001127602-19-027281 · form4.xml · nonDerivative · entry 4

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 58,753

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 $124.77 to $125.75 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: 0001127602-19-027281 · form4.xml · nonDerivative · entry 3

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,404

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: 0001127602-19-027281 · form4.xml · nonDerivative · entry 2

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,999

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: 0001127602-19-027281 · form4.xml · nonDerivative · entry 1

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 44,716

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: 0001127602-19-027201 · form4.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: 5,991,476

Underlying: Class A Common Stock · 20,870 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: 0001127602-19-027201 · form4.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: 56,569

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 $127.46 to $127.72 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: 0001127602-19-027201 · form4.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: 56,869

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 $126.40 to $127.37 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: 0001127602-19-027201 · form4.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: 62,767

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 $125.39 to $126.385 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: 0001127602-19-027201 · form4.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: 77,439

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: 0001127602-19-026900 · form4.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: 4,755

F9 · kind: Represents the shares received by the Reporting Person's trust.

F10 · ownership.nature: The Karyn Smith Revocable Trust U/A/D 9/15/06 Amended 12/23/11, Karyn Smith Trustee.

SEC source: 0001127602-19-026900 · form4.xml · nonDerivative · entry 6

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,487

F8 · kind: Represents shares that were contributed by the Reporting Person to the Reporting Person's trust.

F3 · balance_after: A portion of these shares represent RSUs. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock.

SEC source: 0001127602-19-026900 · form4.xml · nonDerivative · entry 5

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,421

F1 · shares: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs"). This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of minimum statutory tax withholding obligations to be funded by a "sell-to-cover" transaction and does not represent a discretionary sale 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 $126.12 to $126.82 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 RSUs. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock.

SEC source: 0001127602-19-026900 · form4.xml · nonDerivative · entry 4

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,460

F1 · shares: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs"). This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of minimum statutory tax withholding obligations to be funded by a "sell-to-cover" transaction and does not represent a discretionary sale 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 $125.10 to $126.02 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.

F3 · balance_after: A portion of these shares represent RSUs. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock.

SEC source: 0001127602-19-026900 · form4.xml · nonDerivative · entry 3

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,616

F1 · shares: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs"). This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of minimum statutory tax withholding obligations to be funded by a "sell-to-cover" transaction and does not represent a discretionary sale 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 $124.10 to $125.09 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 RSUs. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock.

SEC source: 0001127602-19-026900 · form4.xml · nonDerivative · entry 2

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 46,176

F1 · shares: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs"). This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of minimum statutory tax withholding obligations to be funded by a "sell-to-cover" transaction and does not represent a discretionary sale 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 $123.10 to $124.09 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 RSUs. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock.

SEC source: 0001127602-19-026900 · form4.xml · nonDerivative · entry 1

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 46,934

F1 · shares: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs"). This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of minimum statutory tax withholding obligations to be funded by a "sell-to-cover" transaction and does not represent a discretionary sale 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 $122.09 to $123.08 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 RSUs. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock.

SEC source: 0001127602-19-026896 · form4.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: 56,569

F4 · kind: Represents the shares received by the Reporting Person's trust.

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

SEC source: 0001127602-19-026896 · form4.xml · nonDerivative · entry 2

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 145,476

F3 · kind: Represents shares that were contributed by the Reporting Person to the Reporting Person's trust.

F2 · balance_after: A portion of these shares represent RSUs. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock.

SEC source: 0001127602-19-026896 · form4.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 151,433

F1 · shares: Represents shares of Class A common stock that were withheld by the Issuer to satisfy tax withholding obligations of the Reporting Person in connection with the vesting of Restricted Stock Units ("RSUs").

F2 · balance_after: A portion of these shares represent RSUs. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock.

SEC source: 0001127602-19-026898 · form4.xml · nonDerivative · entry 5

Hu George · CIK 0001386396 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 178,531

F1 · shares: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs"). This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of minimum statutory tax withholding obligations to be funded by a "sell-to-cover" transaction and does not represent a discretionary sale 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 $126.12 to $126.82 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 RSUs. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock.

SEC source: 0001127602-19-026898 · form4.xml · nonDerivative · entry 4

Hu George · CIK 0001386396 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 178,665

F1 · shares: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs"). This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of minimum statutory tax withholding obligations to be funded by a "sell-to-cover" transaction and does not represent a discretionary sale 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 $125.10 to $126.02 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.

F3 · balance_after: A portion of these shares represent RSUs. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock.

SEC source: 0001127602-19-026898 · form4.xml · nonDerivative · entry 3

Hu George · CIK 0001386396 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 179,210

F1 · shares: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs"). This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of minimum statutory tax withholding obligations to be funded by a "sell-to-cover" transaction and does not represent a discretionary sale 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 $124.10 to $125.09 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 RSUs. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock.

SEC source: 0001127602-19-026898 · form4.xml · nonDerivative · entry 2

Hu George · CIK 0001386396 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 181,760

F1 · shares: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs"). This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of minimum statutory tax withholding obligations to be funded by a "sell-to-cover" transaction and does not represent a discretionary sale 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 $123.10 to $124.09 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 RSUs. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock.

SEC source: 0001127602-19-026898 · form4.xml · nonDerivative · entry 1

Hu George · CIK 0001386396 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 184,327

F1 · shares: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs"). This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of minimum statutory tax withholding obligations to be funded by a "sell-to-cover" transaction and does not represent a discretionary sale 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 $122.09 to $123.08 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 RSUs. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock.

SEC source: 0001127602-19-027020 · form4.xml · derivative · entry 7

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.

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.

SEC source: 0001127602-19-027020 · form4.xml · derivative · entry 6

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.

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.

SEC source: 0001127602-19-027020 · form4.xml · derivative · entry 5

DALZELL RICHARD L · CIK 0001184753 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 119,500

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.

F6 · 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.

F7 · 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: 0001127602-19-027020 · form4.xml · nonDerivative · entry 4

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.

F5 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $126.31 to $126.39 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: 0001127602-19-027020 · form4.xml · nonDerivative · entry 3

DALZELL RICHARD L · CIK 0001184753 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,488

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 $123.83 to $124.16 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: 0001127602-19-027020 · form4.xml · nonDerivative · entry 2

DALZELL RICHARD L · CIK 0001184753 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,688

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 $122.81 to $123.19 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: 0001127602-19-027020 · form4.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: 0001447669-20-000016 · wf-form5_158163268023547.xml · derivative · entry 2

ROTTENBERG ERIKA · CIK 0001284038 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 20,279

Underlying: Class A Common Stock · 2,185 shares

Expires not disclosed

F1 · 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.

F1 · 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.

F3 · kind: Represents the shares received by the Reporting Person's trust.

F1 · 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.

F1 · 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.

F4 · ownership.nature: Shares are held by The Erika Rottenberg Revocable Trust.

SEC source: 0001447669-20-000016 · wf-form5_158163268023547.xml · derivative · entry 1

ROTTENBERG ERIKA · CIK 0001284038 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 2,185 shares

Expires not disclosed

F1 · 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.

F1 · 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.

F2 · kind: Represents shares that were contributed by the Reporting Person to the Reporting Person's trust.

F1 · 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.

F1 · 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: 0001127602-19-026243 · form4.xml · derivative · entry 1

Hu George · CIK 0001386396 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 185,000

Underlying: Class A Common Stock · 185,000 shares

Expires 2024-02-27

F1 · derivative.exercise_date: The shares subject to the stock option vest as follows: 50% of the stock option vested on June 30, 2019 and the remaining shares subject to the stock option shall vest in 24 equal monthly installments thereafter, subject to the Reporting Person's continued service to the Issuer through each vesting date.

SEC source: 0000899243-19-021405 · doc4.xml · derivative · 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: 771,162

Underlying: Class A Common Stock · 771,163 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 241,976 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII L.P. ("BVP VII"), 105,865 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst"), 408,333 shares converted from Class B Common Stock to Class A Common Stock by BVP Special Opportunity Fund VII L.P. ("BVP VII SOF"), and 14,989 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.

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.

F2 · derivative.underlying_shares: Represents 241,976 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII L.P. ("BVP VII"), 105,865 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst"), 408,333 shares converted from Class B Common Stock to Class A Common Stock by BVP Special Opportunity Fund VII L.P. ("BVP VII SOF"), and 14,989 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 · balance_after: After the conversion, 241,975 shares of Class B Common Stock are held by BVP VII, 105,864 shares of Class B Common Stock are held by BVP VII Inst, 408,335 shares of Class B Common Stock are held by BVP VII SOF and 14,988 shares of Class B Common Stock are held by BVP 15A.

F3 · ownership.nature: After the conversion, 241,975 shares of Class B Common Stock are held by BVP VII, 105,864 shares of Class B Common Stock are held by BVP VII Inst, 408,335 shares of Class B Common Stock are held by BVP VII SOF and 14,988 shares of Class B Common Stock are held by BVP 15A.

F4 · 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.

F5 · 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: 0000899243-19-021405 · 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: 0

F6 · kind: On August 6, 2019, BVP VII, BVP VII Inst, BVP VII SOF, and BVP 15A distributed, for no consideration, 241,976, 105,865, 408,333, and 14,989 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 · shares: On August 6, 2019, BVP VII, BVP VII Inst, BVP VII SOF, and BVP 15A distributed, for no consideration, 241,976, 105,865, 408,333, and 14,989 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 · price: On August 6, 2019, BVP VII, BVP VII Inst, BVP VII SOF, and BVP 15A distributed, for no consideration, 241,976, 105,865, 408,333, and 14,989 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.

F4 · 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.

F5 · 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: On August 6, 2019, BVP VII, BVP VII Inst, BVP VII SOF, and BVP 15A distributed, for no consideration, 241,976, 105,865, 408,333, and 14,989 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.

SEC source: 0000899243-19-021405 · 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: 771,163

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 241,976 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII L.P. ("BVP VII"), 105,865 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst"), 408,333 shares converted from Class B Common Stock to Class A Common Stock by BVP Special Opportunity Fund VII L.P. ("BVP VII SOF"), and 14,989 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 241,976 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII L.P. ("BVP VII"), 105,865 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst"), 408,333 shares converted from Class B Common Stock to Class A Common Stock by BVP Special Opportunity Fund VII L.P. ("BVP VII SOF"), and 14,989 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 241,976 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII L.P. ("BVP VII"), 105,865 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst"), 408,333 shares converted from Class B Common Stock to Class A Common Stock by BVP Special Opportunity Fund VII L.P. ("BVP VII SOF"), and 14,989 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").

F4 · 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.

F5 · 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: 0000899243-19-021403 · 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: 384,927

F1 · kind: On August 6, 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, 210,170, and 174,757 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 August 6, 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, 210,170, and 174,757 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 August 6, 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, 210,170, and 174,757 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, 174,757 shares of Class A Common Stock are held by BVP VIII, and 210,170 shares of Class A Common Stock are held by BVP VIII Inst.

F3 · ownership.nature: After the distribution, 174,757 shares of Class A Common Stock are held by BVP VIII, and 210,170 shares of Class A Common Stock are 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"). Each of BVP VII Inst, BVP VII SOF, BVP VII and 15 Angels LLC, a wholly-owned subsidiary of BVP VII Inst (collectively, the "BVP VII Funds" and, together with Deer VII Ltd. and Deer VII L.P., the "BVP VII Entities"), beneficially owns shares of Twilio's Class B Common Stock. 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: 0001127602-19-026242 · form4.xml · nonDerivative · entry 1

IMMELT JEFFREY R · CIK 0001233164 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,630

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: 0001127602-19-025173 · form4.xml · derivative · entry 20

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,759

Underlying: Class A Common Stock · 12,265 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: 0001127602-19-025173 · form4.xml · derivative · entry 19

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,749

Underlying: Class A Common Stock · 1,283 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: 0001127602-19-025173 · form4.xml · derivative · entry 18

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,125

Underlying: Class A Common Stock · 7,229 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: 0001127602-19-025173 · form4.xml · derivative · entry 17

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,024

Underlying: Class A Common Stock · 342 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: 0001127602-19-025173 · form4.xml · derivative · entry 16

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,597

Underlying: Class B Common Stock · 342 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: 0001127602-19-025173 · form4.xml · derivative · entry 15

Smith Karyn · CIK 0001665730 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,682

Underlying: Class A Common Stock · 11,923 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.