SES

SEC source: 0001415889-25-011033 · form4-04182025_050410.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,746,903

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 3,751,614 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 2

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,716,876

F4 · 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 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.

F3 · balance_after: Includes 1,501,289 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-011034 · form4-04182025_050411.xml · nonDerivative · entry 1

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,732,567

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.

F3 · balance_after: Includes 1,501,289 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: 0001415889-25-011031 · form4-04182025_050403.xml · nonDerivative · entry 1

Li Gang · CIK 0001972030 · CHIEF MANUFACTURING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 353,720

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 276,586 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-011030 · form4-04182025_050401.xml · nonDerivative · entry 1

Pilkington Kyle · CIK 0001937313 · CHIEF LEGAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 871,287

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 704,102 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-009410 · form4-04012025_050416.xml · nonDerivative · entry 1

Li Gang · CIK 0001972030 · CHIEF MANUFACTURING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 374,473

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 318,427 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-009405 · form4-04012025_050407.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,881,769

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 4,030,551 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-009402 · form4-04012025_050401.xml · nonDerivative · entry 1

NOONEN MICHAEL · CIK 0001085396 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 383,400

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 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: 0001415889-25-009409 · form4-04012025_050414.xml · nonDerivative · entry 1

Xu Kang · CIK 0002039201 · CHIEF TECHNOLOGY OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 694,290

F1 · balance_after: Includes 549,973 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-009448 · form4-04012025_110425.xml · nonDerivative · entry 1

Ma Jiong · CIK 0001854872 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 383,400

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 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: 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: 0001415889-25-009407 · form4-04012025_050410.xml · nonDerivative · entry 1

Pilkington Kyle · CIK 0001937313 · CHIEF LEGAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 896,580

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 759,889 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-009406 · form4-04012025_050409.xml · nonDerivative · entry 1

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,767,977

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 154,500 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 1,571,023 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-009403 · form4-04012025_050403.xml · nonDerivative · entry 1

Luo Eric · CIK 0001907014 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 383,400

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 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: 0001415889-25-009404 · form4-04012025_050405.xml · nonDerivative · entry 1

Choi Jangwook · CIK 0001907078 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 383,400

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 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: 0001415889-25-008454 · form4-03182025_050301.xml · nonDerivative · entry 1

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,817,977

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.

F1 · shares: 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 154,500 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 621,023 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-004706 · form4-02192025_060201.xml · nonDerivative · entry 1

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,829,033

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.

F1 · shares: 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 185,400 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 621,023 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-003675 · form4-02112025_090204.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,781,769

F1 · kind: This transaction was effected pursuant to an automatic sell-to-cover instruction adopted by the Reporting Person on February 9, 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 1,930,551 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-003674 · form4-02112025_090201.xml · nonDerivative · entry 1

Xu Kang · CIK 0002039201 · CHIEF TECHNOLOGY OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 444,290

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 299,973 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-003679 · form4-02112025_090213.xml · nonDerivative · entry 1

Pilkington Kyle · CIK 0001937313 · CHIEF LEGAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 496,580

F1 · kind: This transaction was effected pursuant to an automatic sell-to-cover instruction adopted by the Reporting Person on February 9, 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 359,889 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-003678 · form4-02112025_090211.xml · nonDerivative · entry 1

Li Gang · CIK 0001972030 · CHIEF MANUFACTURING OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 224,473

F1 · kind: This transaction was effected pursuant to an automatic sell-to-cover instruction adopted by the Reporting Person on February 9, 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 168,427 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

SEC source: 0001415889-25-003676 · form4-02112025_090206.xml · nonDerivative · entry 1

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,841,637

F1 · kind: This transaction was effected pursuant to an automatic sell-to-cover instruction adopted by the Reporting Person on February 9, 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 216,300 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.

F4 · balance_after: Includes 621,023 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: 0001415889-25-001718 · form4-01172025_060101.xml · derivative · entry 4

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 886,555

Underlying: Class A Common Stock · 50,000 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 May 30, 2024.

F5 · derivative.exercise_date: Reflects options granted on February 10, 2021 that will vest 25% on the first anniversary of the grant date and continue to vest in equal monthly installments over the following 36 months, subject to the Reporting Person's continued service on the vesting date.

SEC source: 0001415889-25-001718 · form4-01172025_060101.xml · nonDerivative · entry 3

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,922,629

F4 · 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 824,552 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

F3 · balance_after: Includes 216,300 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.

SEC source: 0001415889-25-001718 · form4-01172025_060101.xml · nonDerivative · entry 2

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,935,322

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 May 30, 2024.

F2 · balance_after: Includes 824,552 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

F3 · balance_after: Includes 216,300 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.

SEC source: 0001415889-25-001718 · form4-01172025_060101.xml · nonDerivative · entry 1

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,985,322

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 May 30, 2024.

F2 · balance_after: Includes 824,552 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

F3 · balance_after: Includes 216,300 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.

SEC source: 0001415889-24-030209 · form4-12272024_071201.xml · derivative · entry 3

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 936,555

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 May 30, 2024.

F4 · derivative.exercise_date: Reflects options granted on February 10, 2021 that will vest 25% on the first anniversary of the grant date and continue to vest in equal monthly installments over the following 36 months, subject to the Reporting Person's continued service on the vesting date.

SEC source: 0001415889-24-030209 · form4-12272024_071201.xml · nonDerivative · entry 2

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,935,322

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 May 30, 2024.

F2 · balance_after: Includes 824,552 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

F3 · balance_after: Includes 247,199 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.

SEC source: 0001415889-24-030209 · form4-12272024_071201.xml · nonDerivative · entry 1

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,085,322

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 May 30, 2024.

F2 · balance_after: Includes 824,552 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

F3 · balance_after: Includes 247,199 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.

SEC source: 0000950170-24-138459 · ownership.xml · nonDerivative · entry 2

SK INC. · CIK 0001947998 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,843,210

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.4130 to $0.4279, inclusive.

F2 · balance_after: Includes 3,829,028 Earn-Out Shares.

SEC source: 0000950170-24-138459 · ownership.xml · nonDerivative · entry 1

SK INC. · CIK 0001947998 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,243,210

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.3837 to $0.3844, inclusive. The Reporting Person undertakes to provide to SES AI Corp., any security holder of SES AI Corp., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnotes (1) and (3) to this Form 4.

F2 · balance_after: Includes 3,829,028 Earn-Out Shares.

SEC source: 0000950170-24-137420 · ownership.xml · nonDerivative · entry 2

SK INC. · CIK 0001947998 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,569,670

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.3993 to $0.4056, inclusive.

F2 · balance_after: Includes 3,829,028 Earn-Out Shares.

SEC source: 0001415889-24-029757 · form4-12182024_051201.xml · nonDerivative · entry 1

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,935,322

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 824,552 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

F3 · balance_after: Includes 247,199 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.

SEC source: 0000950170-24-137420 · ownership.xml · nonDerivative · entry 1

SK INC. · CIK 0001947998 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,069,670

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.3922 to $0.4104, inclusive. The Reporting Person undertakes to provide to SES AI Corp., any security holder of SES AI Corp., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnotes (1) and (3) to this Form 4.

F2 · balance_after: Includes 3,829,028 Earn-Out Shares.

SEC source: 0000950170-24-136205 · ownership.xml · nonDerivative · entry 2

SK INC. · CIK 0001947998 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,487,527

F2 · balance_after: Includes 3,829,028 Earn-Out Shares.

SEC source: 0000950170-24-136205 · ownership.xml · nonDerivative · entry 1

SK INC. · CIK 0001947998 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,603,035

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.4439 to $0.4470, inclusive. The Reporting Person undertakes to provide to SES AI Corp., any security holder of SES AI Corp., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (1) to this Form 4.

F2 · balance_after: Includes 3,829,028 Earn-Out Shares.

SEC source: 0000950170-24-135378 · ownership.xml · nonDerivative · entry 2

SK INC. · CIK 0001947998 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,903,035

F2 · balance_after: Includes 3,829,028 Earn-Out Shares.

SEC source: 0000950170-24-135378 · ownership.xml · nonDerivative · entry 1

SK INC. · CIK 0001947998 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,919,155

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.4829 to $0.4840, inclusive. The Reporting Person undertakes to provide to SES AI Corp., any security holder of SES AI Corp., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (1) to this Form 4.

F2 · balance_after: Includes 3,829,028 Earn-Out Shares.

SEC source: 0001415889-24-027248 · form4-11192024_051102.xml · nonDerivative · entry 1

Nealis Jing · CIK 0001907020 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,946,347

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 824,552 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

F3 · balance_after: Includes 278,099 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.

SEC source: 0000950170-24-128612 · ownership.xml · nonDerivative · entry 1

General Motors Holdings LLC · CIK 0001497345 · 10% owner

General Motors Ventures LLC · CIK 0001881756 · 10% owner

General Motors Co · CIK 0001467858 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,843,622

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.20/share to $0.29/share, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F2 · ownership.direct: General Motors Ventures LLC ("GM Ventures") is the record holder of 7,758,498 shares of Class A Common Stock and 2,085,124 shares of Class A Common Stock that may be issued for the benefit of the former holders of SES Holdings Pte. Ltd. common stock (the "Earn-Out Shares"). General Motors Holdings LLC ("GM Holdings") is the record holder of 9,043,889 shares of Class A Common Stock and 836,826 Earn-Out Shares. GM Ventures is a direct, wholly owned subsidiary of GM Holdings, and GM Holdings is a direct, wholly owned subsidiary of General Motors Company ("GM"). GM may be deemed to share beneficial ownership over the shares of Class A Common Stock directly owned by GM Ventures and GM Holdings, and GM Holdings may be deemed to share beneficial ownership over the shares of Class A Common Stock directly owned by GM Ventures. Each of GM and GM Holdings disclaims beneficial ownership of any shares other than to the extent they may have a pecuniary interest therein.

F3 · ownership.direct: (Continued form footnote 2) The address of the principal business office of each of GM, GM Holdings, and GM Ventures is 300 Renaissance Center, Detroit, MI, 48265.

SEC source: 0000950170-24-127590 · ownership.xml · nonDerivative · entry 2

SK INC. · CIK 0001947998 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,319,155

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.3009 to $0.3010, inclusive.

F2 · balance_after: Includes 3,829,028 Earn-Out Shares.

SEC source: 0000950170-24-127590 · ownership.xml · nonDerivative · entry 1

SK INC. · CIK 0001947998 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,619,155

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.2773 to $0.2901, inclusive. The Reporting Person undertakes to provide to SES AI Corp., any security holder of SES AI Corp., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnotes (1) and (3) to this Form 4.

F2 · balance_after: Includes 3,829,028 Earn-Out Shares.

SEC source: 0000950170-24-126331 · ownership.xml · nonDerivative · entry 1

SK INC. · CIK 0001947998 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,869,155

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.3587 to $0.3633, inclusive. The Reporting Person undertakes to provide to SES AI Corp., any security holder of SES AI Corp., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (1) to this Form 4.

F2 · balance_after: Includes 3,829,028 Earn-Out Shares.

SEC source: 0000950170-24-124473 · ownership.xml · nonDerivative · entry 2

SK INC. · CIK 0001947998 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,039,403

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.37 to $0.3826, inclusive.

F2 · balance_after: Includes 3,829,028 Earn-Out Shares.

SEC source: 0000950170-24-124473 · ownership.xml · nonDerivative · entry 1

SK INC. · CIK 0001947998 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,142,518

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.3883 to $0.4077, inclusive. The Reporting Person undertakes to provide to SES AI Corp., any security holder of SES AI Corp., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnotes (1) and (3) to this Form 4.

F2 · balance_after: Includes 3,829,028 Earn-Out Shares.

SEC source: 0000950170-24-123361 · ownership.xml · nonDerivative · entry 2

SK INC. · CIK 0001947998 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,296,623

F1 · balance_after: Includes 3,829,028 Earn-Out Shares.

SEC source: 0000950170-24-123361 · ownership.xml · nonDerivative · entry 1

SK INC. · CIK 0001947998 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,301,084

F1 · balance_after: Includes 3,829,028 Earn-Out Shares.

SEC source: 0000950170-24-121483 · ownership.xml · nonDerivative · entry 2

SK INC. · CIK 0001947998 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,501,084

F2 · balance_after: Includes 3,829,028 Earn-Out Shares.