Gan Hong

SEC source: 0001907008-26-000008 · form4-04162026_050402.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,031,576

F1 · kind: Represents shares withheld to cover the Reporting Person's withholding tax obligations in connection with the vesting of restricted stock units ("RSUs"). These shares were not sold by the Reporting Person.

F1 · shares: Represents shares withheld to cover the Reporting Person's withholding tax obligations in connection with the vesting of restricted stock units ("RSUs"). These shares were not sold by the Reporting Person.

F2 · balance_after: Includes 474,580 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001907008-26-000006 · form4-03312026_050303.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,063,714

F1 · kind: Represents shares withheld to cover the Reporting Person's withholding tax obligations in connection with the vesting of restricted stock units ("RSUs"). These shares were not sold by the Reporting Person.

F2 · balance_after: Includes 544,316 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001907008-26-000004 · form4-02102026_050207.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,138,396

F1 · kind: Represents shares withheld to cover the Reporting Person's withholding tax obligations in connection with the vesting of restricted stock units ("RSUs"). These shares were not sold by the Reporting Person.

F2 · balance_after: Includes 710,981 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001907008-26-000002 · form4-01232026_060101.xml · derivative · entry 6

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 929,832

Underlying: Class A Common Stock · 100,000 shares

Expires 2031-02-09

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.

F1 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on August 14, 2025.

F5 · derivative.exercise_date: Reflects fully vested options granted on February 10, 2021.

SEC source: 0001907008-26-000002 · form4-01232026_060101.xml · nonDerivative · entry 4

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,253,286

F1 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on August 14, 2025.

F4 · price: The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.48 to $2.56, 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 this footnote to this Form 4.

F2 · balance_after: Includes 852,222 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001907008-26-000002 · form4-01232026_060101.xml · nonDerivative · entry 3

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,353,286

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on August 14, 2025.

F2 · balance_after: Includes 852,222 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001907008-26-000002 · form4-01232026_060101.xml · derivative · entry 5

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,029,832

Underlying: Class A Common Stock · 150,000 shares

Expires 2031-02-09

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.

F1 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on August 14, 2025.

F5 · derivative.exercise_date: Reflects fully vested options granted on February 10, 2021.

SEC source: 0001907008-26-000002 · form4-01232026_060101.xml · nonDerivative · entry 2

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,253,286

F1 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on August 14, 2025.

F3 · price: The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.48 to $2.53, 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 this footnote to this Form 4.

F2 · balance_after: Includes 852,222 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001907008-26-000002 · form4-01232026_060101.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,403,286

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on August 14, 2025.

F2 · balance_after: Includes 852,222 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001907008-25-000005 · form4-12162025_051201.xml · derivative · entry 5

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,179,832

Underlying: Class A Common Stock · 6,723 shares

Expires 2031-02-09

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.

F1 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on August 14, 2025.

F5 · derivative.exercise_date: Reflects fully vested options granted on February 10, 2021.

SEC source: 0001907008-25-000005 · form4-12162025_051201.xml · derivative · entry 4

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 93,277 shares

Expires 2029-03-13

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on August 14, 2025.

F4 · derivative.exercise_date: Reflects fully vested options granted on March 14, 2019.

SEC source: 0001907008-25-000005 · form4-12162025_051201.xml · nonDerivative · entry 3

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,253,286

F1 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on August 14, 2025.

F3 · price: The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.935 to $2.07, 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 this footnote to this Form 4.

F2 · balance_after: Includes 852,222 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001907008-25-000005 · form4-12162025_051201.xml · nonDerivative · entry 2

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,353,286

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on August 14, 2025.

F2 · balance_after: Includes 852,222 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001907008-25-000005 · form4-12162025_051201.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,346,563

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on August 14, 2025.

F2 · balance_after: Includes 852,222 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001907008-25-000003 · form4-11182025_051101.xml · derivative · entry 3

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 93,277

Underlying: Class A Common Stock · 150,000 shares

Expires 2029-03-13

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on August 14, 2025.

F4 · derivative.exercise_date: Reflects fully vested options granted on March 14, 2019.

SEC source: 0001907008-25-000003 · form4-11182025_051101.xml · nonDerivative · entry 2

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,253,286

F1 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on August 14, 2025.

F3 · price: The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.85 to $1.99, 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 this footnote to this Form 4.

F2 · balance_after: Includes 852,222 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001907008-25-000003 · form4-11182025_051101.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,403,286

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on August 14, 2025.

F2 · balance_after: Includes 852,222 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-011032 · form4-04182025_050405.xml · nonDerivative · entry 2

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,253,286

F1 · kind: Represents shares withheld to cover the Reporting Person's withholding tax obligations in connection with the vesting of restricted stock units. These shares were not sold by the Reporting Person.

F3 · balance_after: Includes 852,222 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-011032 · form4-04182025_050405.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,294,580

F1 · kind: Represents shares withheld to cover the Reporting Person's withholding tax obligations in connection with the vesting of restricted stock units. These shares were not sold by the Reporting Person.

F2 · balance_after: Includes 945,333 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-009408 · form4-04012025_050413.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,325,506

F1 · shares: Represents shares of Class A common stock, par value $0.0001 per share ("Class A Common Stock"), underlying restricted stock units ("RSUs") granted to the reporting person on March 28, 2025 (the "Grant Date") pursuant to the Issuer's 2021 Incentive Award Plan. The RSUs will vest, and an equal number of shares of Class A Common Stock will be deliverable to the reporting person, in three equal installments on the first, second and third anniversaries of the Grant Date, subject to continued employment or service through each applicable vesting date.

F2 · balance_after: Includes 1,015,067 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-003677 · form4-02112025_090209.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 773,906

F1 · kind: This transaction was effected pursuant to an automatic sell-to-cover instruction adopted by the Reporting Person on February 6, 2024 to cover applicable withholding taxes on the vesting of restricted stock units. The automatic sell-to-cover instructions were intended to comply with the requirements of Rule 10b5-1(c). The sale was not a discretionary trade by the Reporting Person.

F2 · price: The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.13 to $1.26, 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 this footnote to this Form 4.

F3 · balance_after: Includes 515,067 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-24-018974 · form4-07022024_050718.xml · derivative · entry 3

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 243,277

Underlying: Class A Common Stock · 25,000 shares

Expires 2029-03-13

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F4 · derivative.exercise_date: Reflects fully vested options granted on March 14, 2019.

SEC source: 0001415889-24-018974 · form4-07022024_050718.xml · nonDerivative · entry 2

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 825,506

F1 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F3 · price: The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.15 to $1.25, 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 this footnote to this Form 4.

F2 · balance_after: Includes 656,309 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-24-018974 · form4-07022024_050718.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 850,506

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F2 · balance_after: Includes 656,309 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-24-015428 · form4-06042024_090622.xml · derivative · entry 3

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 268,277

Underlying: Class A Common Stock · 25,000 shares

Expires 2029-03-13

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F4 · derivative.exercise_date: Reflects fully vested options granted on March 14, 2019.

SEC source: 0001415889-24-015428 · form4-06042024_090622.xml · nonDerivative · entry 2

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 825,506

F1 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F3 · price: The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.22 to $1.30, 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 this footnote to this Form 4.

F2 · balance_after: Includes 656,309 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-24-015428 · form4-06042024_090622.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 850,506

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F2 · balance_after: Includes 656,309 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-24-012753 · form4-05092024_050501.xml · derivative · entry 3

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 293,277

Underlying: Class A Common Stock · 25,000 shares

Expires 2029-03-13

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F4 · derivative.exercise_date: Reflects fully vested options granted on March 14, 2019.

SEC source: 0001415889-24-012753 · form4-05092024_050501.xml · nonDerivative · entry 2

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 825,506

F1 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F3 · price: The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.35 to $1.47, 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 this footnote to this Form 4.

F2 · balance_after: Includes 656,309 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-24-012753 · form4-05092024_050501.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 850,506

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F2 · balance_after: Includes 656,309 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-24-011339 · form4-04222024_090412.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 825,506

F1 · kind: Represents shares withheld to cover the Reporting Person's withholding tax obligations in connection with the vesting of restricted stock units ("RSUs"). These shares were not sold by the Reporting Person.

F1 · shares: Represents shares withheld to cover the Reporting Person's withholding tax obligations in connection with the vesting of restricted stock units ("RSUs"). These shares were not sold by the Reporting Person.

F2 · balance_after: Includes 656,309 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-24-011047 · form4-04172024_050405.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 852,833

F1 · kind: Represents shares withheld to cover the Reporting Person's withholding tax obligations in connection with the vesting of restricted stock units. These shares were not sold by the Reporting Person.

F1 · shares: Represents shares withheld to cover the Reporting Person's withholding tax obligations in connection with the vesting of restricted stock units. These shares were not sold by the Reporting Person.

F2 · balance_after: Includes 749,418 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-24-009840 · form4-04022024_050421.xml · derivative · entry 3

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 318,277

Underlying: Class A Common Stock · 25,000 shares

Expires 2029-03-13

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F4 · derivative.exercise_date: Reflects fully vested options granted on March 14, 2019.

SEC source: 0001415889-24-009840 · form4-04022024_050421.xml · nonDerivative · entry 2

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 875,001

F1 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F3 · price: The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.57 to $1.66, 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 this footnote to this Form 4.

F2 · balance_after: Includes 819,153 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-24-009840 · form4-04022024_050421.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 900,001

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F2 · balance_after: Includes 819,153 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-24-006330 · form4-03042024_050302.xml · derivative · entry 3

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 343,277

Underlying: Class A Common Stock · 25,000 shares

Expires 2029-03-13

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F4 · derivative.exercise_date: Reflects fully vested options granted on March 14, 2019.

SEC source: 0001415889-24-006330 · form4-03042024_050302.xml · nonDerivative · entry 2

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 875,001

F1 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F3 · price: The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.64 to $1.75, 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 this footnote to this Form 4.

F2 · balance_after: Includes 819,153 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-24-006330 · form4-03042024_050302.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 900,001

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F2 · balance_after: Includes 819,153 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-24-003443 · form4-02122024_070209.xml · derivative · entry 2

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 423,728

Underlying: Class A Common Stock · 423,728 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents shares of Class A Common Stock underlying performance vesting RSUs ("PSUs") granted to the reporting person on the Grant Date pursuant to the Issuer's 2021 Incentive Award Plan. The PSUs vest in one installment following the end of a three-year period (the "Initial Performance Period") commencing on the Grant Date, subject to the achievement of certain Class A Common Stock price milestones and the reporting person's continued employment or service through such date. If following the Initial Performance Period there are PSUs that have not vested, then such PSUs remain eligible to vest in an additional installment following the end of a five-year period commencing on the Grant Date, subject to the achievement of certain Class A Common Stock price milestones and the reporting person's continued employment or service through such date.

F4 · derivative.exercise_price: The number of PSUs reported represents the maximum number of PSUs that may vest following certification by the Issuer's compensation committee. The share price thresholds for vesting of the PSUs are as follows: under $12.5, 0%; $12.5 or greater, 25%; $15 or greater, 50%; $17.5 or greater, 75%; and $20 or greater, 100%. A specified percentage of the PSUs will vest based on the average closing price of Class A Common Stock during any consecutive 100-calendar-day period during the Initial Performance Period, assuming that the average closing price during the last 30-calendar-day period in the Initial Performance also exceeds the highest share price threshold achieved. Otherwise, the number of PSUs that vest will be based on the average closing price during the last 30 calendar days of the Initial Performance Period using the same share price thresholds.

F3 · derivative.exercise_date: Represents shares of Class A Common Stock underlying performance vesting RSUs ("PSUs") granted to the reporting person on the Grant Date pursuant to the Issuer's 2021 Incentive Award Plan. The PSUs vest in one installment following the end of a three-year period (the "Initial Performance Period") commencing on the Grant Date, subject to the achievement of certain Class A Common Stock price milestones and the reporting person's continued employment or service through such date. If following the Initial Performance Period there are PSUs that have not vested, then such PSUs remain eligible to vest in an additional installment following the end of a five-year period commencing on the Grant Date, subject to the achievement of certain Class A Common Stock price milestones and the reporting person's continued employment or service through such date.

F4 · derivative.exercise_date: The number of PSUs reported represents the maximum number of PSUs that may vest following certification by the Issuer's compensation committee. The share price thresholds for vesting of the PSUs are as follows: under $12.5, 0%; $12.5 or greater, 25%; $15 or greater, 50%; $17.5 or greater, 75%; and $20 or greater, 100%. A specified percentage of the PSUs will vest based on the average closing price of Class A Common Stock during any consecutive 100-calendar-day period during the Initial Performance Period, assuming that the average closing price during the last 30-calendar-day period in the Initial Performance also exceeds the highest share price threshold achieved. Otherwise, the number of PSUs that vest will be based on the average closing price during the last 30 calendar days of the Initial Performance Period using the same share price thresholds.

F3 · derivative.expiration_date: Represents shares of Class A Common Stock underlying performance vesting RSUs ("PSUs") granted to the reporting person on the Grant Date pursuant to the Issuer's 2021 Incentive Award Plan. The PSUs vest in one installment following the end of a three-year period (the "Initial Performance Period") commencing on the Grant Date, subject to the achievement of certain Class A Common Stock price milestones and the reporting person's continued employment or service through such date. If following the Initial Performance Period there are PSUs that have not vested, then such PSUs remain eligible to vest in an additional installment following the end of a five-year period commencing on the Grant Date, subject to the achievement of certain Class A Common Stock price milestones and the reporting person's continued employment or service through such date.

F4 · derivative.expiration_date: The number of PSUs reported represents the maximum number of PSUs that may vest following certification by the Issuer's compensation committee. The share price thresholds for vesting of the PSUs are as follows: under $12.5, 0%; $12.5 or greater, 25%; $15 or greater, 50%; $17.5 or greater, 75%; and $20 or greater, 100%. A specified percentage of the PSUs will vest based on the average closing price of Class A Common Stock during any consecutive 100-calendar-day period during the Initial Performance Period, assuming that the average closing price during the last 30-calendar-day period in the Initial Performance also exceeds the highest share price threshold achieved. Otherwise, the number of PSUs that vest will be based on the average closing price during the last 30 calendar days of the Initial Performance Period using the same share price thresholds.

SEC source: 0001415889-24-003443 · form4-02122024_070209.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 875,001

F1 · shares: Represents shares of Class A common stock, par value $0.0001 per share ("Class A Common Stock"), underlying restricted stock units ("RSUs") granted to the reporting person on February 9, 2024 (the "Grant Date") pursuant to the Issuer's 2021 Incentive Award Plan. The RSUs will vest, and an equal number of shares of Class A Common Stock will be deliverable to the reporting person, in three equal installments on the first, second and third anniversaries of the Grant Date, subject to continued employment or service through each applicable vesting date.

F2 · balance_after: Includes 819,153 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-24-002377 · form4-02022024_050201.xml · derivative · entry 3

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 368,277

Underlying: Class A Common Stock · 25,000 shares

Expires 2029-03-13

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F4 · derivative.exercise_date: Reflects fully vested options granted on March 14, 2019.

SEC source: 0001415889-24-002377 · form4-02022024_050201.xml · nonDerivative · entry 2

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 451,273

F1 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F3 · price: The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.34 to $1.42, 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 this footnote to this Form 4.

F2 · balance_after: Includes shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-24-002377 · form4-02022024_050201.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 476,273

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F2 · balance_after: Includes shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-24-000375 · form4-01032024_050101.xml · derivative · entry 3

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 393,277

Underlying: Class A Common Stock · 25,000 shares

Expires 2029-03-13

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F4 · derivative.exercise_date: Reflects fully vested options granted on March 14, 2019.

SEC source: 0001415889-24-000375 · form4-01032024_050101.xml · nonDerivative · entry 2

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 451,273

F1 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F3 · price: The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.79 to $1.90, 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 this footnote to this Form 4.

F2 · balance_after: Includes shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-24-000375 · form4-01032024_050101.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 476,273

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F2 · balance_after: Includes shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-23-015937 · form4-12062023_051201.xml · derivative · entry 3

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 418,277

Underlying: Class A Common Stock · 25,000 shares

Expires 2029-03-13

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F3 · derivative.exercise_date: Reflects fully vested options granted on March 14, 2019.

SEC source: 0001415889-23-015937 · form4-12062023_051201.xml · nonDerivative · entry 2

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 451,273

F1 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

F2 · price: The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.23 to $2.35, 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 this footnote to this Form 4

SEC source: 0001415889-23-015937 · form4-12062023_051201.xml · nonDerivative · entry 1

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 476,273

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 · kind: The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on September 5, 2023.

SEC source: 0001415889-23-013222 · form4-09132023_040904.xml · derivative · entry 3

Gan Hong · CIK 0001907008 · CHIEF SCIENCE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 443,277

Underlying: Class A Common Stock · 50,000 shares

Expires 2029-03-13

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: Reflects fully vested options granted on March 14, 2019.