Johnson Virginia

SEC source: 0000950170-25-077611 · ownership.xml · nonDerivative · entry 1

Johnson Virginia · CIK 0001929494 · CLO, GC, and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,450

F1 · shares: The vesting of the restricted stock units was accelerated upon the Reporting Person's termination of employment on May 23, 2025. The accelerated vesting was in accordance with the terms of the Reporting Person's Executive Agreement, which provides for acceleration upon termination under certain circumstances.

F2 · shares: Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units ("RSUs").

F3 · balance_after: Represents 24,235 shares of Common Stock and 20,215 RSUs.

SEC source: 0000950170-25-037451 · ownership.xml · nonDerivative · entry 1

Johnson Virginia · CIK 0001929494 · CLO, GC, and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,579

F1 · shares: Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units ("RSUs").

F2 · balance_after: Represents 11,426 shares of Common Stock and 39,153 RSUs.

SEC source: 0000950170-25-035606 · ownership.xml · derivative · entry 4

Johnson Virginia · CIK 0001929494 · CLO, GC, Secretary & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,614

Underlying: Common Stock · 52,614 shares

Expires not disclosed

F5 · derivative.exercise_price: Each performance share unit ("PSU") represents a contingent right to receive one share of Common Stock upon vesting. The PSUs vest on March 5, 2028, following the completion of the performance period, which begins on January 1, 2025 and ends on December 31, 2027. Ranging between 0-200% of the target number of PSUs (as reflected in Table II above), the PSUs vest based on the total shareholder return of Common Stock relative to the total stockholder return of the components of the Russell 2000 Index.

F5 · derivative.exercise_date: Each performance share unit ("PSU") represents a contingent right to receive one share of Common Stock upon vesting. The PSUs vest on March 5, 2028, following the completion of the performance period, which begins on January 1, 2025 and ends on December 31, 2027. Ranging between 0-200% of the target number of PSUs (as reflected in Table II above), the PSUs vest based on the total shareholder return of Common Stock relative to the total stockholder return of the components of the Russell 2000 Index.

F5 · derivative.expiration_date: Each performance share unit ("PSU") represents a contingent right to receive one share of Common Stock upon vesting. The PSUs vest on March 5, 2028, following the completion of the performance period, which begins on January 1, 2025 and ends on December 31, 2027. Ranging between 0-200% of the target number of PSUs (as reflected in Table II above), the PSUs vest based on the total shareholder return of Common Stock relative to the total stockholder return of the components of the Russell 2000 Index.

SEC source: 0000950170-25-035606 · ownership.xml · derivative · entry 3

Johnson Virginia · CIK 0001929494 · CLO, GC, Secretary & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,804

Underlying: Common Stock · 37,804 shares

Expires 2035-03-05

F4 · derivative.exercise_date: The options vest as to one-third of the shares on March 5, 2026, an additional one-third of the shares on March 5, 2027 and the remaining one-third of the shares on March 5, 2028.

SEC source: 0000950170-25-035606 · ownership.xml · nonDerivative · entry 2

Johnson Virginia · CIK 0001929494 · CLO, GC, Secretary & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,503

F2 · shares: Each Restricted Stock Unit ("RSU") represents the right to receive one share of Common Stock upon vesting. The RSUs vest as to one-third of the shares on March 5, 2026, an additional one-third of the shares on March 5, 2027 and the remaining one-third of the shares on March 5, 2028.

F3 · balance_after: Represents 7,843 shares of Common Stock and 44,660 RSUs.

SEC source: 0000950170-25-035606 · ownership.xml · nonDerivative · entry 1

Johnson Virginia · CIK 0001929494 · CLO, GC, Secretary & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,196

F1 · shares: Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units ("RSUs").

SEC source: 0000950170-24-068010 · ownership.xml · nonDerivative · entry 1

Johnson Virginia · CIK 0001929494 · CLO, GC, Secretary & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,132

F1 · shares: Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units ("RSUs").

F2 · balance_after: Represents 6,102 shares of Common Stock and 21,030 RSUs.

SEC source: 0000950170-24-029204 · ownership.xml · nonDerivative · entry 1

Johnson Virginia · CIK 0001929494 · CLO, GC, Secretary & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,794

F1 · shares: Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units ("RSUs").

F2 · balance_after: Represents 4,779 shares of Common Stock and 23,015 RSUs.

SEC source: 0000950170-24-028303 · ownership.xml · derivative · entry 2

Johnson Virginia · CIK 0001929494 · CLO, GC, Secretary & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,249

Underlying: Common Stock · 35,249 shares

Expires 2024-03-05

F3 · derivative.exercise_date: The options vest as to one-third of the shares on March 5, 2025, an additional one-third of the shares on March 5, 2026 and the remaining one-third of the shares on March 5, 2027.

SEC source: 0000950170-24-028303 · ownership.xml · nonDerivative · entry 1

Johnson Virginia · CIK 0001929494 · CLO, GC, Secretary & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,923

F1 · shares: Each Restricted Stock Unit ("RSU") represents the right to receive one share of Common Stock upon vesting. The RSUs vest as to one-third of the shares on March 5, 2025, an additional one-third of the shares on March 5, 2026 and the remaining one-third of the shares on March 5, 2027.

F2 · balance_after: Represents 1,402 shares of Common Stock and 28,521 RSUs.

SEC source: 0000950170-24-028280 · ownership.xml · nonDerivative · entry 1

Johnson Virginia · CIK 0001929494 · CLO, GC, Secretary & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,891

F1 · shares: Represents unearned performance-based restricted shares granted on June 2, 2022 that were cancelled on March 5, 2024.

F2 · balance_after: Represents 1,402 shares of Common Stock, and 20,489 RSUs.

SEC source: 0001209191-23-048829 · doc4.xml · derivative · entry 1

Johnson Virginia · CIK 0001929494 · CLO, GC and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,000

Underlying: Common Stock · 85,000 shares

Expires 2033-09-07

F1 · derivative.exercise_date: The options will vest in full on September 7, 2026, subject to continuous service through such date.

SEC source: 0001209191-23-034246 · doc4.xml · nonDerivative · entry 2

Johnson Virginia · CIK 0001929494 · CLO, GC and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,481

F2 · shares: Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of RSUs.

F3 · balance_after: Represents 1,402 shares of Common Stock, 20,489 RSUs and 53,590 shares of Restricted Common Stock.

SEC source: 0001209191-23-034246 · doc4.xml · derivative · entry 3

Johnson Virginia · CIK 0001929494 · CLO, GC and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,979

Underlying: Common Stock · 75,979 shares

Expires 2033-06-01

F4 · derivative.exercise_date: The options vest as to one-third of the shares on March 8, 2024, an additional one-third of the shares on March 8, 2025 and the remaining one-third of the shares on March 8, 2026.

SEC source: 0001209191-23-034246 · doc4.xml · nonDerivative · entry 1

Johnson Virginia · CIK 0001929494 · CLO, GC and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,064

F1 · shares: Each Restricted Stock Unit ("RSU") represents the right to receive one share of Common Stock upon vesting. The RSUs vest as to one-third of the shares on March 8, 2024, an additional one-third of the shares on March 8, 2025 and the remaining one-third of the shares on March 8, 2026.

SEC source: 0001209191-22-034750 · doc4a.xml · derivative · entry 3

Johnson Virginia · CIK 0001929494 · CLO, GC and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,927

Underlying: Common Stock · 29,927 shares

Expires 2032-06-02

F5 · derivative.exercise_date: The options will vest as to one-third of the shares on June 2, 2023, an additional one-third of the shares on June 2, 2024 and the remaining one-third of the shares on June 2, 2025.

SEC source: 0001209191-22-034750 · doc4a.xml · nonDerivative · entry 2

Johnson Virginia · CIK 0001929494 · CLO, GC and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 59,545

F2 · shares: The reporting person was granted restricted shares of common stock (the "Award") pursuant to a Performance-Based Restricted Stock Agreement by and between Aspen Aerogels, Inc. and the reporting person subject to the 2014 Employee, Director and Consultant Equity Incentive Plan. In order for a tranche of this Award to vest, both time and performance vesting conditions must be satisfied. For the time vesting condition, a tranche will vest at the later of (i) three years from the grant date or (ii) one year from the date when an applicable performance hurdle is achieved, subject to a maximum five-year vesting period for shares with respect to which the performance hurdle has been achieved. With respect to the performance vesting condition, there are three tranches with different share price hurdles and a five-year total performance period. If a share price hurdle is not met after five years, the applicable tranche is forfeited.

F3 · shares: (cont.) The share price hurdle is met by reference to a 30-day volume weighted average price (VWAP) that is maintained for 60 days (the "Share Price Hurdle"). The first tranche consists of 34% of the restricted shares of common stock granted under the Award, with the Share Price Hurdle equal to $43.33.The second tranche consists of 33% of the restricted shares of common stock granted under the Award, with the Share Price Hurdle equal to $64.99. The third tranche consists of 33% of the restricted shares of common stock granted under the Award, with the Share Price Hurdle equal to $86.65.

F2 · price: The reporting person was granted restricted shares of common stock (the "Award") pursuant to a Performance-Based Restricted Stock Agreement by and between Aspen Aerogels, Inc. and the reporting person subject to the 2014 Employee, Director and Consultant Equity Incentive Plan. In order for a tranche of this Award to vest, both time and performance vesting conditions must be satisfied. For the time vesting condition, a tranche will vest at the later of (i) three years from the grant date or (ii) one year from the date when an applicable performance hurdle is achieved, subject to a maximum five-year vesting period for shares with respect to which the performance hurdle has been achieved. With respect to the performance vesting condition, there are three tranches with different share price hurdles and a five-year total performance period. If a share price hurdle is not met after five years, the applicable tranche is forfeited.

F3 · price: (cont.) The share price hurdle is met by reference to a 30-day volume weighted average price (VWAP) that is maintained for 60 days (the "Share Price Hurdle"). The first tranche consists of 34% of the restricted shares of common stock granted under the Award, with the Share Price Hurdle equal to $43.33.The second tranche consists of 33% of the restricted shares of common stock granted under the Award, with the Share Price Hurdle equal to $64.99. The third tranche consists of 33% of the restricted shares of common stock granted under the Award, with the Share Price Hurdle equal to $86.65.

F4 · balance_after: Represents 5,955 Restricted Stock Units and 53,590 shares of Restricted Common Stock.

SEC source: 0001209191-22-034750 · doc4a.xml · nonDerivative · entry 1

Johnson Virginia · CIK 0001929494 · CLO, GC and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,955

F1 · shares: Each Restricted Stock Unit ("RSU") represent the right to receive one share of Common Stock upon vesting. The RSUs vest as to one-third of the shares on June 2, 2023, an additional one-third of the shares on June 2, 2024 and the remaining shares on June 2, 2025.

F1 · price: Each Restricted Stock Unit ("RSU") represent the right to receive one share of Common Stock upon vesting. The RSUs vest as to one-third of the shares on June 2, 2023, an additional one-third of the shares on June 2, 2024 and the remaining shares on June 2, 2025.

SEC source: 0001209191-22-034710 · doc4.xml · derivative · entry 3

Johnson Virginia · CIK 0001929494 · CLO, GC and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,927

Underlying: Common Stock · 29,927 shares

Expires 2032-06-02

F5 · derivative.exercise_date: These options vest as to one-third of the shares on June 2, 2023, and additional one-third of the shares on June 2, 2024 and the remaining one-third of the shares on June 2, 2025.

SEC source: 0001209191-22-034710 · doc4.xml · nonDerivative · entry 2

Johnson Virginia · CIK 0001929494 · CLO, GC and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 59,545

F2 · price: The reporting person was granted restricted shares of common stock (the "Award") pursuant to a Performance-Based Restricted Stock Agreement by and between Aspen Aerogels, Inc. and the reporting person subject to the 2014 Employee, Director and Consultant Equity Incentive Plan. In order for a tranche of this Award to vest, both time and performance vesting conditions must be satisfied. For the time vesting condition, a tranche will vest at the later of (i) three years from the grant date or (ii) one year from the date when an applicable performance hurdle is achieved, subject to a maximum five-year vesting period for shares with respect to which the performance hurdle has been achieved. With respect to the performance vesting condition, there are three tranches with different share price hurdles and a five-year total performance period. If a share price hurdle is not met after five years, the applicable tranche is forfeited.

F3 · price: (cont.) The share price hurdle is met by reference to a 30-day volume weighted average price (VWAP) that is maintained for 60 days (the "Share Price Hurdle"). The first tranche consists of 34% of the restricted shares of common stock granted under the Award, with the Share Price Hurdle equal to $43.33.The second tranche consists of 33% of the restricted shares of common stock granted under the Award, with the Share Price Hurdle equal to $64.99. The third tranche consists of 33% of the restricted shares of common stock granted under the Award, with the Share Price Hurdle equal to $86.65

F4 · balance_after: Represents 5,955 Restricted Stock Units and 53,590 shares of Restricted Common Stock.

SEC source: 0001209191-22-034710 · doc4.xml · nonDerivative · entry 1

Johnson Virginia · CIK 0001929494 · CLO, GC and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,955

F1 · shares: Each Restricted Stock Unit ("RSU") represent the right to receive one share of Common Stock upon vesting. The RSUs vest as to one-third of the shares on June 2, 2023, and additional one-third of the shares on June 2, 2024 and the remaining shares on June 2, 2025.