SCHILLING KEITH L

SEC source: 0000950170-25-037449 · ownership.xml · nonDerivative · entry 1

SCHILLING KEITH L · CIK 0001628467 · SVP, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,797

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 14,223 shares of Common Stock and 35,574 RSUs.

SEC source: 0000950170-25-035592 · ownership.xml · derivative · entry 4

SCHILLING KEITH L · CIK 0001628467 · SVP, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,426

Underlying: Common Stock · 49,426 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: 0000950170-25-035592 · ownership.xml · derivative · entry 3

SCHILLING KEITH L · CIK 0001628467 · SVP, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,837

Underlying: Common Stock · 34,837 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: 0000950170-25-035592 · ownership.xml · nonDerivative · entry 2

SCHILLING KEITH L · CIK 0001628467 · SVP, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,721

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 10,640 shares of Common Stock and 41,081 RSUs.

SEC source: 0000950170-25-035592 · ownership.xml · nonDerivative · entry 1

SCHILLING KEITH L · CIK 0001628467 · SVP, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,008

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

SEC source: 0000950170-25-027201 · ownership.xml · nonDerivative · entry 1

SCHILLING KEITH L · CIK 0001628467 · SVP, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,944

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 8,899 shares of Common Stock and 19,045 RSUs.

SEC source: 0000950170-24-121009 · ownership.xml · nonDerivative · entry 1

SCHILLING KEITH L · CIK 0001628467 · SVP, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,443

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 7,972 shares of Common Stock and 20,471 RSUs.

SEC source: 0000950170-24-059310 · ownership.xml · derivative · entry 4

SCHILLING KEITH L · CIK 0001628467 · SVP, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,979

Underlying: Common Stock · 20,000 shares

Expires 2033-06-01

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.

F4 · derivative.exercise_date: The options are currently vested with respect to 25,326 shares. The remaining options vest in two installments as follows: 25,327 shares on March 8, 2025 and 25,326 shares on March 8, 2026.

SEC source: 0000950170-24-059310 · ownership.xml · nonDerivative · entry 3

SCHILLING KEITH L · CIK 0001628467 · SVP, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,792

F2 · price: These transactions were executed in multiple trades at prices ranging from $27.38 to $27.45. The reporting person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price.

F3 · balance_after: Represents 7,133 shares of Common Stock and 21,659 Restricted Stock Units.

SEC source: 0000950170-24-059310 · ownership.xml · nonDerivative · entry 2

SCHILLING KEITH L · CIK 0001628467 · SVP, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,292

F1 · price: These transactions were executed in multiple trades at prices ranging from $26.38 to $27.36. The reporting person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price.

SEC source: 0000950170-24-059310 · ownership.xml · nonDerivative · entry 1

SCHILLING KEITH L · CIK 0001628467 · SVP, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,792

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

SEC source: 0000950170-24-029210 · ownership.xml · nonDerivative · entry 1

SCHILLING KEITH L · CIK 0001628467 · SVP, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,792

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 7,133 shares of Common Stock and 21,659 RSUs.

SEC source: 0000950170-24-028108 · ownership.xml · derivative · entry 2

SCHILLING KEITH L · CIK 0001628467 · SVP, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,249

Underlying: Common Stock · 35,249 shares

Expires 2034-03-05

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: 0000950170-24-028108 · ownership.xml · nonDerivative · entry 1

SCHILLING KEITH L · CIK 0001628467 · SVP, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,837

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 3,672 shares of Common Stock and 27,165 RSUs.

SEC source: 0000950170-24-028012 · ownership.xml · nonDerivative · entry 1

SCHILLING KEITH L · CIK 0001628467 · SVP, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,805

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

F2 · balance_after: Represents 3,672 shares of Common Stock and19,133 RSUs.

SEC source: 0000950170-24-020864 · ownership.xml · nonDerivative · entry 1

SCHILLING KEITH L · CIK 0001628467 · SVP, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,395

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 3,672 shares of common stock, 19,133 RSUs and 53,590 Restricted Stock.

SEC source: 0000950170-23-058585 · ownership.xml · nonDerivative · entry 1

SCHILLING KEITH L · CIK 0001628467 · Sr. Vice President, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,890

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 2,740 shares of common stock, 20,560 RSUs and 53,590 Restricted Stock.

SEC source: 0001209191-23-048825 · doc4.xml · derivative · entry 1

SCHILLING KEITH L · CIK 0001628467 · Sr. Vice President, Technology

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: 0001209191-23-033665 · doc4.xml · derivative · entry 2

SCHILLING KEITH L · CIK 0001628467 · Sr. Vice President, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,979

Underlying: Common Stock · 75,979 shares

Expires 2033-06-01

F3 · 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: 0001209191-23-033665 · doc4.xml · nonDerivative · entry 1

SCHILLING KEITH L · CIK 0001628467 · Sr. Vice President, Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 77,239

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.

F2 · balance_after: Represents 1,901 shares of Common Stock, 21,748 RSUs and 53,590 shares of Restricted Stock.

SEC source: 0001209191-23-013362 · doc4.xml · nonDerivative · entry 1

SCHILLING KEITH L · CIK 0001628467 · Sr. Vice President, Technology

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,720

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 1,901 shares of Common Stock, 5,229 RSUs and 53,590 shares of Restricted Stock.

SEC source: 0001209191-22-055835 · doc4.xml · nonDerivative · entry 1

SCHILLING KEITH L · CIK 0001628467 · Sr. Vice President, Technology

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,143

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

F2 · balance_after: Represents 898 shares of common stock, 6,655 RSUs and 53,590 Restricted Stock.

SEC source: 0001209191-22-034713 · doc4.xml · nonDerivative · entry 1

SCHILLING KEITH L · CIK 0001628467 · Sr. Vice President, Technology

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,433

F1 · 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.

F2 · 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.

F1 · 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.

F2 · 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.

F3 · balance_after: Represents 7,843 Restricted Stock Units and 53,590 Restricted Stock.

SEC source: 0001209191-22-013351 · doc4.xml · derivative · entry 2

SCHILLING KEITH L · CIK 0001628467 · Sr. Vice President, Technology

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,408

Underlying: Common Stock · 22,408 shares

Expires 2032-02-23

F3 · derivative.exercise_date: The options vest as to one-third of the shares on February 23, 2023, and additional one-third of the shares on February 23, 2024 and the remaining one-third of the shares on February 23, 2025.

SEC source: 0001209191-22-013351 · doc4.xml · nonDerivative · entry 1

SCHILLING KEITH L · CIK 0001628467 · Sr. Vice President, Technology

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,843

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 February 23, 2023, an additional one-third of the shares on February 23, 2024 and the remaining one-third of the shares on February 23, 2025.

F2 · balance_after: Represents RSUs.