SES

SEC source: 0002150165-26-000004 · form4-10072026_081001.xml · nonDerivative · entry 1

Diemer Paul · CIK 0002150165 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 320,000

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 October 5, 2026 (the "Grant Date") pursuant to the Issuer's 2021 Incentive Award Plan. The RSUs will vest in full, and an equal number of shares of Class A Common Stock will be deliverable to the reporting person, on the first anniversary of the Grant Date, subject to continued service through such vesting date.

F2 · balance_after: Includes 320,000 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0002039201-26-000008 · form4-09032026_050901.xml · nonDerivative · entry 1

Xu Kang · CIK 0002039201 · CHIEF TECHNOLOGY OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 766,437

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 458,528 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001937313-26-000012 · form4-05272026_050503.xml · nonDerivative · entry 1

Pilkington Kyle · CIK 0001937313 · CHIEF LEGAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,023,548

F1 · kind: The 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 November 12, 2025.

F2 · price: The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.20 to $1.21, 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 733,646 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001907013-26-000008 · form4-05202026_050508.xml · nonDerivative · entry 1

Hu Qichao · CIK 0001907013 · Director · CEO & CHAIRMAN · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,449,607

F1 · kind: 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 May 18, 2026 (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.

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 May 18, 2026 (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 3,497,664 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0002039201-26-000006 · form4-05202026_050510.xml · nonDerivative · entry 1

Xu Kang · CIK 0002039201 · CHIEF TECHNOLOGY OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 801,635

F1 · kind: 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 May 18, 2026 (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.

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 May 18, 2026 (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 537,894 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001854872-26-000002 · form4-05202026_050501.xml · nonDerivative · entry 1

Ma Jiong · CIK 0001854872 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 524,993

F1 · kind: 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 May 18, 2026 (the "Grant Date") pursuant to the Issuer's 2021 Incentive Award Plan. The RSUs will vest in full, and an equal number of shares of Class A Common Stock will be deliverable to the reporting person, on the first anniversary of the Grant Date, subject to continued service through such vesting date.

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 May 18, 2026 (the "Grant Date") pursuant to the Issuer's 2021 Incentive Award Plan. The RSUs will vest in full, and an equal number of shares of Class A Common Stock will be deliverable to the reporting person, on the first anniversary of the Grant Date, subject to continued service through such vesting date.

SEC source: 0002133613-26-000005 · form4-05202026_050514.xml · nonDerivative · entry 1

Liu Yi Ray · CIK 0002133613 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 331,858

F1 · kind: 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 May 18, 2026 (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 331,858 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001937313-26-000010 · form4-05202026_050512.xml · nonDerivative · entry 1

Pilkington Kyle · CIK 0001937313 · CHIEF LEGAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,048,548

F1 · kind: 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 May 18, 2026 (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.

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 May 18, 2026 (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 733,646 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001839171-26-000002 · form4-05202026_050506.xml · nonDerivative · entry 1

Boyd Andrew J · CIK 0001839171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 437,889

F1 · kind: 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 May 18, 2026 (the "Grant Date") pursuant to the Issuer's 2021 Incentive Award Plan. The RSUs will vest in full, and an equal number of shares of Class A Common Stock will be deliverable to the reporting person, on the first anniversary of the Grant Date, subject to continued service through such vesting date.

F1 · balance_after: 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 May 18, 2026 (the "Grant Date") pursuant to the Issuer's 2021 Incentive Award Plan. The RSUs will vest in full, and an equal number of shares of Class A Common Stock will be deliverable to the reporting person, on the first anniversary of the Grant Date, subject to continued service through such vesting date.

SEC source: 0001907014-26-000002 · form4-05202026_050504.xml · nonDerivative · entry 1

Luo Eric · CIK 0001907014 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 524,993

F1 · kind: 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 May 18, 2026 (the "Grant Date") pursuant to the Issuer's 2021 Incentive Award Plan. The RSUs will vest in full, and an equal number of shares of Class A Common Stock will be deliverable to the reporting person, on the first anniversary of the Grant Date, subject to continued service through such vesting date.

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 May 18, 2026 (the "Grant Date") pursuant to the Issuer's 2021 Incentive Award Plan. The RSUs will vest in full, and an equal number of shares of Class A Common Stock will be deliverable to the reporting person, on the first anniversary of the Grant Date, subject to continued service through such vesting date.

SEC source: 0001907013-26-000006 · form4-04162026_050401.xml · nonDerivative · entry 1

Hu Qichao · CIK 0001907013 · Director · CEO & CHAIRMAN · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,945,182

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 1,993,239 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001937313-26-000008 · form4-04162026_050406.xml · nonDerivative · entry 1

Pilkington Kyle · CIK 0001937313 · CHIEF LEGAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 694,566

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 379,664 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001907020-26-000006 · form4-04162026_050404.xml · nonDerivative · entry 1

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,305,943

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 836,871 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

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: 0001907013-26-000004 · form4-03312026_050301.xml · nonDerivative · entry 1

Hu Qichao · CIK 0001907013 · Director · CEO & CHAIRMAN · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,078,485

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 2,272,184 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0002039201-26-000004 · form4-03312026_050309.xml · nonDerivative · entry 1

Xu Kang · CIK 0002039201 · CHIEF TECHNOLOGY OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 580,396

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 316,655 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001937313-26-000006 · form4-03312026_050308.xml · nonDerivative · entry 1

Pilkington Kyle · CIK 0001937313 · CHIEF LEGAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 719,751

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 435,453 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001907020-26-000004 · form4-03312026_050305.xml · nonDerivative · entry 1

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,342,088

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 906,607 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: 0001937313-26-000004 · form4-03112026_070301.xml · nonDerivative · entry 1

Pilkington Kyle · CIK 0001937313 · CHIEF LEGAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 780,203

F1 · kind: The 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 November 12, 2025.

F2 · balance_after: Includes 568,785 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001907013-26-000002 · form4-02102026_050205.xml · nonDerivative · entry 1

Hu Qichao · CIK 0001907013 · Director · CEO & CHAIRMAN · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,388,931

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 2,972,177 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001937313-26-000002 · form4-02102026_050210.xml · nonDerivative · entry 1

Pilkington Kyle · CIK 0001937313 · CHIEF LEGAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 805,203

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 568,785 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001907020-26-000002 · form4-02102026_050209.xml · nonDerivative · entry 1

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,506,056

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 1,223,271 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: 0002039201-26-000002 · form4-02102026_050201.xml · nonDerivative · entry 1

Xu Kang · CIK 0002039201 · CHIEF TECHNOLOGY OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 619,989

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 399,988 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: 0001415889-25-024113 · form4-09102025_050902.xml · nonDerivative · entry 1

Boyd Andrew J · CIK 0001839171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 296,296

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 September 8, 2025 (the "Grant Date") pursuant to the Issuer's 2021 Incentive Award Plan. The RSUs will vest in full, and an equal number of shares of Class A Common Stock will be deliverable to the reporting person, on the first anniversary of the Grant Date, subject to continued service through such vesting date.

F2 · balance_after: Includes 296,296 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-023678 · form4-09042025_040903.xml · nonDerivative · entry 1

Xu Kang · CIK 0002039201 · CHIEF TECHNOLOGY OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 655,052

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 470,609 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-022190 · form4-08182025_050801.xml · nonDerivative · entry 1

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,616,287

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

F2 · balance_after: Includes 1,426,800 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-021448 · form4-08112025_050801.xml · nonDerivative · entry 1

Pilkington Kyle · CIK 0001937313 · CHIEF LEGAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 861,277

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 681,778 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-020025 · form4-07182025_050701.xml · nonDerivative · entry 1

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,631,978

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

F2 · balance_after: Includes 30,900 unvested shares of Class A Common Stock under a restricted share award granted on August 16, 2021. The restricted share award vested 25% on the first anniversary of the grant date and will vest in equal monthly installments over the following 36 months, subject to the reporting person's continued service on each vesting date.

F3 · balance_after: Includes 1,426,800 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-017736 · form4-06182025_070601.xml · nonDerivative · entry 1

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,647,669

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

F2 · balance_after: Includes 61,800 unvested shares of Class A Common Stock under a restricted share award granted on August 16, 2021. The restricted share award vested 25% on the first anniversary of the grant date and will vest in equal monthly installments over the following 36 months, subject to the reporting person's continued service on each vesting date.

F3 · balance_after: Includes 1,426,800 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-013831 · form4-05202025_050501.xml · nonDerivative · entry 1

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,663,360

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

F2 · balance_after: Includes 92,700 unvested shares of Class A Common Stock under a restricted share award granted on August 16, 2021. The restricted share award vested 25% on the first anniversary of the grant date and will vest in equal monthly installments over the following 36 months, subject to the reporting person's continued service on each vesting date.

F3 · balance_after: Includes 1,426,800 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-011033 · form4-04182025_050410.xml · nonDerivative · entry 2

Hu Qichao · CIK 0001907013 · Director · CEO & CHAIRMAN · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,656,865

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.

F3 · balance_after: Includes 3,565,391 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-011034 · form4-04182025_050411.xml · nonDerivative · entry 3

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,679,051

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 123,600 unvested shares of Class A Common Stock under a restricted share award granted on August 16, 2021. The restricted share award vested 25% on the first anniversary of the grant date and will vest in equal monthly installments over the following 36 months, subject to the reporting person's continued service on each vesting date.

F5 · balance_after: Includes 1,426,800 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: 0001415889-25-011030 · form4-04182025_050401.xml · nonDerivative · entry 2

Pilkington Kyle · CIK 0001937313 · CHIEF LEGAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 866,729

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.

F3 · balance_after: Includes 694,047 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.