DUOL

SEC source: 0001628280-25-053186 · wk-form4_1763587244.xml · nonDerivative · entry 5

Chen Stephen C. · CIK 0001869758 · General Counsel

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 31,542

F2 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on May 27, 2025.

F6 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $176.74 to $177.51, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-053186 · wk-form4_1763587244.xml · nonDerivative · entry 4

Chen Stephen C. · CIK 0001869758 · General Counsel

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 32,022

F2 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on May 27, 2025.

F5 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $175.62 to $176.57, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-053186 · wk-form4_1763587244.xml · nonDerivative · entry 3

Chen Stephen C. · CIK 0001869758 · General Counsel

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 32,342

F2 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on May 27, 2025.

F4 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $174.51 to $175.50, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-053186 · wk-form4_1763587244.xml · nonDerivative · entry 2

Chen Stephen C. · CIK 0001869758 · General Counsel

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 32,936

F2 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on May 27, 2025.

F3 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $173.40 to $174.38, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-053182 · wk-form4_1763587228.xml · nonDerivative · entry 6

Glance Natalie · CIK 0001870350 · Chief Engineering Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 111,166

F2 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on November 14, 2024.

F7 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $177.51 to $177.74, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-053182 · wk-form4_1763587228.xml · nonDerivative · entry 5

Glance Natalie · CIK 0001870350 · Chief Engineering Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 111,326

F2 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on November 14, 2024.

F6 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $176.45 to $177.33, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-053182 · wk-form4_1763587228.xml · nonDerivative · entry 4

Glance Natalie · CIK 0001870350 · Chief Engineering Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 111,886

F2 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on November 14, 2024.

F5 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $175.40 to $176.35, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-053182 · wk-form4_1763587228.xml · nonDerivative · entry 3

Glance Natalie · CIK 0001870350 · Chief Engineering Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 112,736

F2 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on November 14, 2024.

F4 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $174.39 to $175.38, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-053182 · wk-form4_1763587228.xml · nonDerivative · entry 2

Glance Natalie · CIK 0001870350 · Chief Engineering Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 113,477

F2 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on November 14, 2024.

F3 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $173.36 to $174.21, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-053009 · wk-form4_1763510325.xml · nonDerivative · entry 1

Meese Robert · CIK 0001869668 · Chief Business Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 123,636

F1 · kind: Represents shares automatically sold to satisfy tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs") and delivery of shares.

SEC source: 0001628280-25-053183 · wk-form4_1763587234.xml · nonDerivative · entry 1

Skaruppa Matthew · CIK 0001869669 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 40,546

F1 · kind: Represents shares automatically sold to satisfy tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs") and delivery of shares.

SEC source: 0001628280-25-053186 · wk-form4_1763587244.xml · nonDerivative · entry 1

Chen Stephen C. · CIK 0001869758 · General Counsel

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 33,056

F1 · kind: Represents shares automatically sold to satisfy tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs") and delivery of shares.

SEC source: 0001628280-25-053182 · wk-form4_1763587228.xml · nonDerivative · entry 1

Glance Natalie · CIK 0001870350 · Chief Engineering Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 113,637

F1 · kind: Represents shares automatically sold to satisfy tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs") and delivery of shares.

SEC source: 0001628280-25-050203 · wk-form4_1762463833.xml · derivative · entry 14

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 114,305

Underlying: Class A Common Stock · 10,000 shares

Expires not disclosed

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

F13 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

F13 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

F13 · derivative.expiration_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

SEC source: 0001628280-25-050203 · wk-form4_1762463833.xml · derivative · entry 13

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 124,305

Underlying: Class A Common Stock · 10,000 shares

Expires not disclosed

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

F13 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

F13 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

F13 · derivative.expiration_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

SEC source: 0001628280-25-050203 · wk-form4_1762463833.xml · derivative · entry 12

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 15,252

Underlying: Class B Common Stock · 10,000 shares

Expires 2030-12-02

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: The shares subject to the option are fully vested and exercisable.

SEC source: 0001628280-25-050203 · wk-form4_1762463833.xml · nonDerivative · entry 11

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 72

F1 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F11 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $266.51 to $267.38, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-050203 · wk-form4_1762463833.xml · nonDerivative · entry 10

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,217

F1 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F10 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $265.51 to $266.50, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-050203 · wk-form4_1762463833.xml · nonDerivative · entry 9

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,944

F1 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F9 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $264.50 to $265.49, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-050203 · wk-form4_1762463833.xml · nonDerivative · entry 8

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,704

F1 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F8 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $263.50 to $264.44, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-050203 · wk-form4_1762463833.xml · nonDerivative · entry 7

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 5,329

F1 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F7 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $262.49 to $263.42, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-050203 · wk-form4_1762463833.xml · nonDerivative · entry 6

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 5,889

F1 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F6 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $261.49 to $262.35, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-050203 · wk-form4_1762463833.xml · nonDerivative · entry 5

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,667

F1 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F5 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $260.46 to $261.44, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-050203 · wk-form4_1762463833.xml · nonDerivative · entry 4

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,832

F1 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F4 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $259.29 to $260.05, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-050203 · wk-form4_1762463833.xml · nonDerivative · entry 3

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 8,392

F1 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F3 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $258.23 to $259.22, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-050203 · wk-form4_1762463833.xml · nonDerivative · entry 2

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,328

F1 · kind: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F2 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $257.23 to $258.20, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-050203 · wk-form4_1762463833.xml · nonDerivative · entry 1

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 10,072

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: 0001628280-25-045963 · wk-form4_1761178598.xml · derivative · entry 22

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 114,305

Underlying: Class A Common Stock · 31,770 shares

Expires not disclosed

F16 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

F16 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

F16 · derivative.expiration_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · derivative · entry 21

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 146,075

Underlying: Class A Common Stock · 60,000 shares

Expires not disclosed

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

F16 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

F16 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

F16 · derivative.expiration_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · derivative · entry 20

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 390,000

Underlying: Class B Common Stock · 60,000 shares

Expires 2031-06-21

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.

F17 · derivative.exercise_price: Each Performance-Based Restricted Stock Unit ("PSU") represents a contingent right to receive one share of the Issuer's Class B Common Stock upon vesting. The PSUs vest upon the satisfaction of both a service-based condition and a performance-based condition. The service-based condition is satisfied as to 25% of the PSUs on each anniversary of the completion of the Issuer's initial public offering of Class A common stock based on the Reporting Person's continuous service as CTO to the Issuer through the applicable vesting dates, subject to acceleration upon a cessation of service as CTO as a result of death or permanent disability.

F18 · derivative.exercise_price: The performance-based condition will be satisfied upon the Issuer's Class A common stock achieving certain stock price hurdles over a period of ten years. Vested PSUs will be settled by the issuance of the underlying Class B Common Stock on the first anniversary of vesting, subject to acceleration upon a termination of employment or a change in control of the Issuer.

F17 · derivative.exercise_date: Each Performance-Based Restricted Stock Unit ("PSU") represents a contingent right to receive one share of the Issuer's Class B Common Stock upon vesting. The PSUs vest upon the satisfaction of both a service-based condition and a performance-based condition. The service-based condition is satisfied as to 25% of the PSUs on each anniversary of the completion of the Issuer's initial public offering of Class A common stock based on the Reporting Person's continuous service as CTO to the Issuer through the applicable vesting dates, subject to acceleration upon a cessation of service as CTO as a result of death or permanent disability.

F18 · derivative.exercise_date: The performance-based condition will be satisfied upon the Issuer's Class A common stock achieving certain stock price hurdles over a period of ten years. Vested PSUs will be settled by the issuance of the underlying Class B Common Stock on the first anniversary of vesting, subject to acceleration upon a termination of employment or a change in control of the Issuer.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · derivative · entry 19

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 86,075

Underlying: Class A Common Stock · 10,000 shares

Expires not disclosed

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

F16 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

F16 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

F16 · derivative.expiration_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · derivative · entry 18

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 96,075

Underlying: Class A Common Stock · 10,000 shares

Expires not disclosed

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

F16 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

F16 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

F16 · derivative.expiration_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · derivative · entry 17

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 25,252

Underlying: Class B Common Stock · 10,000 shares

Expires 2030-12-02

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.

F15 · derivative.exercise_date: The shares subject to the option are fully vested and exercisable.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · nonDerivative · entry 16

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 72

F1 · shares: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · nonDerivative · entry 15

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 172

F1 · shares: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F14 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $322.98 to $323.25, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · nonDerivative · entry 14

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 472

F1 · shares: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F13 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $321.32 to $322.19, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · nonDerivative · entry 13

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 872

F1 · shares: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F12 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $319.85 to $320.21, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · nonDerivative · entry 12

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,172

F1 · shares: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F11 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $318.38 to $319.26, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · nonDerivative · entry 11

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,079

F1 · shares: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F10 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $317.22 to $318.20, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · nonDerivative · entry 10

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,759

F1 · shares: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F9 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $316.22 to $317.19, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · nonDerivative · entry 9

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,359

F1 · shares: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F8 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $315.18 to $316.17, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · nonDerivative · entry 8

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 5,459

F1 · shares: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F7 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $313.65 to $314.30, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · nonDerivative · entry 7

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 5,959

F1 · shares: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F6 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $311.94 to $312.65, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · nonDerivative · entry 6

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,240

F1 · shares: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F5 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $310.86 to $311.81, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · nonDerivative · entry 5

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 8,240

F1 · shares: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F4 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $309.71 to $310.18, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · nonDerivative · entry 4

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 8,872

F1 · shares: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F3 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $308.61 to $309.24, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · nonDerivative · entry 3

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,372

F1 · shares: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

F2 · price: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $307.18 to $307.89, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · nonDerivative · entry 2

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,972

F1 · shares: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 11, 2024.

SEC source: 0001628280-25-045963 · wk-form4_1761178598.xml · nonDerivative · entry 1

Hacker Severin · CIK 0001870272 · Director · Chief Tech Officer, Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 10,072

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: 0001628280-25-045962 · wk-form4_1761178561.xml · derivative · entry 3

von Ahn Luis · CIK 0001829259 · Director · President & CEO, Co-Founder · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,218,403

Underlying: Class A Common Stock · 51,768 shares

Expires not disclosed

F3 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

F3 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.

F3 · derivative.expiration_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.