ZS

SEC source: 0001713683-26-000202 · wk-form4_1791924438.xml · derivative · entry 7

Geller Adam · CIK 0002040014 · Chief Product Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 25,000

Underlying: Common Stock · 1,042 shares

Expires 2034-12-05

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.

F3 · derivative.exercise_date: The shares subject to the options are fully vested and immediately exercisable.

SEC source: 0001713683-26-000202 · wk-form4_1791924438.xml · nonDerivative · entry 5

Geller Adam · CIK 0002040014 · Chief Product Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 38,308

F1 · kind: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 20, 2026.

SEC source: 0001713683-26-000202 · wk-form4_1791924438.xml · nonDerivative · entry 4

Geller Adam · CIK 0002040014 · Chief Product Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 39,350

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.

SEC source: 0001713683-26-000202 · wk-form4_1791924438.xml · derivative · entry 6

Geller Adam · CIK 0002040014 · Chief Product Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 26,042

Underlying: Common Stock · 23,958 shares

Expires 2034-12-05

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.

F3 · derivative.exercise_date: The shares subject to the options are fully vested and immediately exercisable.

SEC source: 0001713683-26-000202 · wk-form4_1791924438.xml · nonDerivative · entry 3

Geller Adam · CIK 0002040014 · Chief Product Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 38,308

F1 · kind: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 20, 2026.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $230.00 to $230.0014, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or 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.

SEC source: 0001713683-26-000202 · wk-form4_1791924438.xml · nonDerivative · entry 2

Geller Adam · CIK 0002040014 · Chief Product Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 40,391

F1 · kind: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 20, 2026.

SEC source: 0001713683-26-000202 · wk-form4_1791924438.xml · nonDerivative · entry 1

Geller Adam · CIK 0002040014 · Chief Product Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 62,266

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.

SEC source: 0001713683-26-000195 · wk-form4_1790641219.xml · nonDerivative · entry 12

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,768

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

SEC source: 0001713683-26-000195 · wk-form4_1790641219.xml · nonDerivative · entry 11

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,771

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F12 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $205.99 to $206.00, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (12) to this Form 4.

SEC source: 0001713683-26-000195 · wk-form4_1790641219.xml · nonDerivative · entry 10

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,775

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F11 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $204.89 to $205.75, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (12) to this Form 4.

SEC source: 0001713683-26-000195 · wk-form4_1790641219.xml · nonDerivative · entry 9

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,795

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $203.89 to $204.75, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (12) to this Form 4.

SEC source: 0001713683-26-000195 · wk-form4_1790641219.xml · nonDerivative · entry 8

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,807

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $202.84 to $203.61, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (12) to this Form 4.

SEC source: 0001713683-26-000195 · wk-form4_1790641219.xml · nonDerivative · entry 7

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,843

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $201.68 to $202.29, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (12) to this Form 4.

SEC source: 0001713683-26-000195 · wk-form4_1790641219.xml · nonDerivative · entry 6

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,848

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $200.54 to $201.4035, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (12) to this Form 4.

SEC source: 0001713683-26-000195 · wk-form4_1790641219.xml · nonDerivative · entry 5

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,868

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $199.50 to $199.87, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (12) to this Form 4.

SEC source: 0001713683-26-000195 · wk-form4_1790641219.xml · nonDerivative · entry 4

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,877

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $197.19 to $197.46, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (12) to this Form 4.

SEC source: 0001713683-26-000195 · wk-form4_1790641219.xml · nonDerivative · entry 3

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,880

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $196.19 to $197.05, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (12) to this Form 4.

SEC source: 0001713683-26-000195 · wk-form4_1790641219.xml · nonDerivative · entry 2

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,998

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $195.19 to $196.1698, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (12) to this Form 4.

SEC source: 0001713683-26-000195 · wk-form4_1790641219.xml · nonDerivative · entry 1

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 43,187

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $194.15 to $195.14, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (12) to this Form 4.

SEC source: 0001713683-26-000184 · wk-form4_1790027874.xml · nonDerivative · entry 1

Geller Adam · CIK 0002040014 · Chief Product Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 38,308

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 20, 2026.

SEC source: 0001713683-26-000182 · wk-form4_1790027535.xml · nonDerivative · entry 1

Schlossman Robert · CIK 0001435941 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 61,525

F1 · kind: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on July 3, 2025.

SEC source: 0001713683-26-000176 · wk-form4_1789688660.xml · nonDerivative · entry 3

Geller Adam · CIK 0002040014 · Chief Product Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 38,969

F3 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 20, 2026.

SEC source: 0001713683-26-000170 · wk-form4_1789688475.xml · nonDerivative · entry 1

BEER JAMES A · CIK 0001272505 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,030

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on October 3, 2025.

SEC source: 0001713683-26-000180 · wk-form4_1789688771.xml · nonDerivative · entry 1

Chaudhry Jagtar Singh · CIK 0001374436 · Director · CEO & Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 340,186

F1 · kind: Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units as mandated by the Issuer's election under its equity incentive plans and does not represent a discretionary trade by the Reporting Person.

SEC source: 0001713683-26-000178 · wk-form4_1789688713.xml · nonDerivative · entry 2

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,287

F2 · kind: Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units as mandated by the Issuer's election under its equity incentive plans and does not represent a discretionary trade by the Reporting Person.

SEC source: 0001713683-26-000176 · wk-form4_1789688660.xml · nonDerivative · entry 2

Geller Adam · CIK 0002040014 · Chief Product Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 43,553

F2 · kind: Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units as mandated by the Issuer's election under its equity incentive plans and does not represent a discretionary trade by the Reporting Person.

SEC source: 0001713683-26-000174 · wk-form4_1789688583.xml · nonDerivative · entry 1

Rich Michael J. · CIK 0002009289 · CRO and President of WW Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 96,193

F1 · kind: Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units as mandated by the Issuer's election under its equity incentive plans and does not represent a discretionary trade by the Reporting Person.

SEC source: 0001713683-26-000172 · wk-form4_1789688527.xml · nonDerivative · entry 1

Schlossman Robert · CIK 0001435941 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,919

F1 · kind: Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units as mandated by the Issuer's election under its equity incentive plans and does not represent a discretionary trade by the Reporting Person.

SEC source: 0001713683-26-000178 · wk-form4_1789688713.xml · nonDerivative · entry 1

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,244

F1 · shares: Represents restricted stock units granted upon achievement of certain FY25 performance metrics pursuant to performance-based restricted stock units granted June 3, 2025 under Zscaler's Amended and Restated Fiscal Year 2018 Equity Incentive Plan. The restricted stock units reported in this Form 4 were issued and vested on September 15, 2026.

SEC source: 0001713683-26-000176 · wk-form4_1789688660.xml · nonDerivative · entry 1

Geller Adam · CIK 0002040014 · Chief Product Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 49,131

F1 · shares: Represents restricted stock units granted upon achievement of certain FY26 performance metrics pursuant to performance-based restricted stock units granted October 15, 2025 under Zscaler's Amended and Restated Fiscal Year 2018 Equity Incentive Plan. The restricted stock units reported in this Form 4 were issued and vested on September 15, 2026.

SEC source: 0001713683-26-000132 · wk-form4_1787777837.xml · nonDerivative · entry 5

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 40,895

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

SEC source: 0001713683-26-000132 · wk-form4_1787777837.xml · nonDerivative · entry 4

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 40,901

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $175.33 to $176.12, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (5) to this Form 4.

SEC source: 0001713683-26-000132 · wk-form4_1787777837.xml · nonDerivative · entry 3

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 40,967

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $174.18 to $174.94, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (5) to this Form 4.

SEC source: 0001713683-26-000132 · wk-form4_1787777837.xml · nonDerivative · entry 2

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 41,015

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $173.10 to $174.05, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (5) to this Form 4.

SEC source: 0001713683-26-000132 · wk-form4_1787777837.xml · nonDerivative · entry 1

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 41,107

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $172.10 to $173.09, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (5) to this Form 4.

SEC source: 0001713683-26-000127 · wk-form4_1785282350.xml · nonDerivative · entry 5

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 41,398

F1 · kind: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $148.3000 to $149.2500, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (6) to this Form 4.

SEC source: 0001713683-26-000127 · wk-form4_1785282350.xml · nonDerivative · entry 4

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 41,540

F1 · kind: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $147.2600 to $148.2200, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (6) to this Form 4.

SEC source: 0001713683-26-000127 · wk-form4_1785282350.xml · nonDerivative · entry 3

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 41,658

F1 · kind: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $146.2500 to $147.2400, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (6) to this Form 4.

SEC source: 0001713683-26-000127 · wk-form4_1785282350.xml · nonDerivative · entry 2

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 41,754

F1 · kind: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $145.2500 to $146.2100, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (6) to this Form 4.

SEC source: 0001713683-26-000127 · wk-form4_1785282350.xml · nonDerivative · entry 1

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 41,829

F1 · kind: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $144.0500 to $145.0400, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (6) to this Form 4.

SEC source: 0001713683-26-000125 · wk-form4_1783462315.xml · nonDerivative · entry 1

Schlossman Robert · CIK 0001435941 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 69,244

F1 · kind: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on July 03, 2025.

SEC source: 0001713683-26-000123 · wk-form4_1782505470.xml · nonDerivative · entry 5

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 41,901

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

SEC source: 0001713683-26-000123 · wk-form4_1782505470.xml · nonDerivative · entry 4

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 41,913

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $125.5700 to $126.2200 , inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (5) to this Form 4.

SEC source: 0001713683-26-000123 · wk-form4_1782505470.xml · nonDerivative · entry 3

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,141

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $124.5300 to $125.5200 , inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (5) to this Form 4.

SEC source: 0001713683-26-000123 · wk-form4_1782505470.xml · nonDerivative · entry 2

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,701

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $123.5100 to $124.4700 , inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (5) to this Form 4.

SEC source: 0001713683-26-000123 · wk-form4_1782505470.xml · nonDerivative · entry 1

RUBIN KEVIN · CIK 0001198529 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 44,397

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 24, 2026.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $122.4900 to $123.4600 , inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (5) to this Form 4.

SEC source: 0001713683-26-000121 · wk-form4_1782246257.xml · nonDerivative · entry 1

Geller Adam · CIK 0002040014 · Chief Product Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,314

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 20, 2026.

SEC source: 0001713683-26-000109 · wk-form4_1781740988.xml · nonDerivative · entry 1

BEER JAMES A · CIK 0001272505 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,207

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on October 3, 2025.

SEC source: 0001713683-26-000117 · wk-form4_1781741414.xml · nonDerivative · entry 1

Geller Adam · CIK 0002040014 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,131

F1 · kind: Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units as mandated by the Issuer's election under its equity incentive plans and does not represent a discretionary trade by the Reporting Person.

F2 · balance_after: Includes 122 shares acquired under the Issuer's FY2018 Employee Stock Purchase Plan on June 15, 2026.

SEC source: 0001713683-26-000114 · wk-form4_1781741218.xml · nonDerivative · entry 1

Rich Michael J. · CIK 0002009289 · CRO and President of WW Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 100,301

F1 · kind: Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units as mandated by the Issuer's election under its equity incentive plans and does not represent a discretionary trade by the Reporting Person.

F2 · balance_after: Includes 135 shares acquired under the Issuer's FY2018 Employee Stock Purchase Plan on June 15, 2026.