Rubinger Matthew

SEC source: 0001600641-25-000044 · wk-form4_1742428701.xml · nonDerivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 31,451

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.00 to $3.02, inclusive. The reporting person undertakes to provide to Issuer, any security holder of 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 range set forth in this footnote.

SEC source: 0001600641-25-000039 · wk-form4_1742251216.xml · derivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 109,000

Underlying: Common Stock · 109,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F2 · derivative.exercise_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2025, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F2 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2025, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-25-000031 · wk-form4_1741827471.xml · derivative · entry 7

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,700

Underlying: Common Stock · 9,088 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F5 · derivative.exercise_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2024, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F5 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2024, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-25-000031 · wk-form4_1741827471.xml · derivative · entry 6

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,819

Underlying: Common Stock · 9,204 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4 · derivative.exercise_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F4 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-25-000031 · wk-form4_1741827471.xml · derivative · entry 5

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,713

Underlying: Common Stock · 2,904 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F3 · derivative.exercise_date: Twenty-five percent (25%) of the restricted stock units shall vest on December 8, 2022, provided the Reporting Person continues to have a service relationship with the Issuer at such time. Thereafter, the remaining seventy-five percent (75%) of the restricted stock units shall vest in 12 equal quarterly installments starting on March 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F3 · derivative.expiration_date: Twenty-five percent (25%) of the restricted stock units shall vest on December 8, 2022, provided the Reporting Person continues to have a service relationship with the Issuer at such time. Thereafter, the remaining seventy-five percent (75%) of the restricted stock units shall vest in 12 equal quarterly installments starting on March 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-25-000031 · wk-form4_1741827471.xml · nonDerivative · entry 4

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,583

F2 · shares: These shares were retained by 1stdibs, Inc. ("1stdibs") via settlement on a net withholding basis in order to meet the tax withholding obligations of the reporting person in connection with the vesting of an installment of restricted stock units ("RSUs") granted to the reporting person on December 9, 2021, March 14, 2023, and March 15, 2024. None of these shares were sold in an open market transaction.

SEC source: 0001600641-25-000031 · wk-form4_1741827471.xml · nonDerivative · entry 3

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,226

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 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

SEC source: 0001600641-25-000031 · wk-form4_1741827471.xml · nonDerivative · entry 2

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,138

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 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

SEC source: 0001600641-25-000031 · wk-form4_1741827471.xml · nonDerivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,934

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 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

SEC source: 0001600641-25-000029 · wk-form4_1741827247.xml · nonDerivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 26,030

SEC source: 0001600641-24-000212 · wk-form4_1733966033.xml · derivative · entry 7

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,788

Underlying: Common Stock · 9,087 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F5 · derivative.exercise_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2024, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F5 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2024, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-24-000212 · wk-form4_1733966033.xml · derivative · entry 6

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,023

Underlying: Common Stock · 9,205 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4 · derivative.exercise_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F4 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-24-000212 · wk-form4_1733966033.xml · derivative · entry 5

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,617

Underlying: Common Stock · 2,904 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F3 · derivative.exercise_date: Twenty-five percent (25%) of the restricted stock units shall vest on December 8, 2022, provided the Reporting Person continues to have a service relationship with the Issuer at such time. Thereafter, the remaining seventy-five percent (75%) of the restricted stock units shall vest in 12 equal quarterly installments starting on March 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F3 · derivative.expiration_date: Twenty-five percent (25%) of the restricted stock units shall vest on December 8, 2022, provided the Reporting Person continues to have a service relationship with the Issuer at such time. Thereafter, the remaining seventy-five percent (75%) of the restricted stock units shall vest in 12 equal quarterly installments starting on March 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-24-000212 · wk-form4_1733966033.xml · nonDerivative · entry 4

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,031

F2 · shares: These shares were retained by 1stdibs, Inc. ("1stdibs") via settlement on a net withholding basis in order to meet the tax withholding obligations of the reporting person in connection with the vesting of an installment of restricted stock units ("RSUs") granted to the reporting person on December 9, 2021, March 14, 2023, and March 15, 2024. None of these shares were sold in an open market transaction.

SEC source: 0001600641-24-000212 · wk-form4_1733966033.xml · nonDerivative · entry 3

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,673

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 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

SEC source: 0001600641-24-000212 · wk-form4_1733966033.xml · nonDerivative · entry 2

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,586

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 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

SEC source: 0001600641-24-000212 · wk-form4_1733966033.xml · nonDerivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,381

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 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

SEC source: 0001600641-25-000027 · wk-form4a_1741827152.xml · derivative · entry 7

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,788

Underlying: Common Stock · 9,087 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F6 · derivative.exercise_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2024, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F6 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2024, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-25-000027 · wk-form4a_1741827152.xml · derivative · entry 6

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,023

Underlying: Common Stock · 9,205 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F5 · derivative.exercise_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F5 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-25-000027 · wk-form4a_1741827152.xml · derivative · entry 5

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,617

Underlying: Common Stock · 2,904 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4 · derivative.exercise_date: Twenty-five percent (25%) of the restricted stock units shall vest on December 8, 2022, provided the Reporting Person continues to have a service relationship with the Issuer at such time. Thereafter, the remaining seventy-five percent (75%) of the restricted stock units shall vest in 12 equal quarterly installments starting on March 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F4 · derivative.expiration_date: Twenty-five percent (25%) of the restricted stock units shall vest on December 8, 2022, provided the Reporting Person continues to have a service relationship with the Issuer at such time. Thereafter, the remaining seventy-five percent (75%) of the restricted stock units shall vest in 12 equal quarterly installments starting on March 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-25-000027 · wk-form4a_1741827152.xml · nonDerivative · entry 4

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,163

F3 · shares: These shares were retained by 1stdibs, Inc. ("1stdibs") via settlement on a net withholding basis in order to meet the tax withholding obligations of the reporting person in connection with the vesting of an installment of restricted stock units ("RSUs") granted to the reporting person on December 9, 2021, March 14, 2023, and March 15, 2024. None of these shares were sold in an open market transaction.

SEC source: 0001600641-25-000027 · wk-form4a_1741827152.xml · nonDerivative · entry 3

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,805

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 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

SEC source: 0001600641-25-000027 · wk-form4a_1741827152.xml · nonDerivative · entry 2

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,718

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 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

SEC source: 0001600641-25-000027 · wk-form4a_1741827152.xml · nonDerivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,513

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 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F2 · balance_after: The sales reported on this Form 4 were previously reported in a timely manner; however, the amounts included in Column 5, Amount of Securities Beneficially Owned Following Reported Transaction(s), were misstated due to a scrivener's error. This Amended Form 4 restates the amounts in Column 5. All other information regarding the sales was accurately reported.

SEC source: 0001600641-24-000199 · wk-form4_1732662502.xml · nonDerivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,477

SEC source: 0001600641-25-000025 · wk-form4a_1741826475.xml · nonDerivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 20,609

F1 · balance_after: The sale reported on this Form 4 was previously reported in a timely manner; however, the amount included in Column 5, Amount of Securities Beneficially Owned Following Reported Transaction(s), was misstated due to a scrivener's error. This Amended Form 4 restates the amount in Column 5. All other information regarding the sale was accurately reported.

SEC source: 0001600641-24-000177 · wk-form4_1726698218.xml · nonDerivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 32,611

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan, adopted September 15, 2023.

SEC source: 0001600641-24-000183 · wk-form4a_1728433980.xml · nonDerivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 32,611

F1 · kind: The sales reported on this Form 4 were previously reported in a timely manner and had been described as effected pursuant to a Rule 10b5-1 trading plan, adopted September 15, 2023. The sales of some of the shares were effected pursuant to a Rule 10b5-1 trading plan, adopted September 15, 2023, and also incorporated the non-discretionary sales of shares that were not part of such Rule 10b5-1 trading plan that had been inadvertently executed by the broker in accordance with plan directions. All other information regarding the sales was accurately reported.

SEC source: 0001600641-24-000171 · wk-form4_1726094547.xml · derivative · entry 7

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 90,875

Underlying: Common Stock · 9,088 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F5 · derivative.exercise_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2024, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F5 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2024, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-24-000171 · wk-form4_1726094547.xml · derivative · entry 6

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,228

Underlying: Common Stock · 9,205 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4 · derivative.exercise_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F4 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-24-000171 · wk-form4_1726094547.xml · derivative · entry 5

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,521

Underlying: Common Stock · 2,904 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F3 · derivative.exercise_date: Twenty-five percent (25%) of the restricted stock units shall vest on December 8, 2022, provided the Reporting Person continues to have a service relationship with the Issuer at such time. Thereafter, the remaining seventy-five percent (75%) of the restricted stock units shall vest in 12 equal quarterly installments starting on March 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F3 · derivative.expiration_date: Twenty-five percent (25%) of the restricted stock units shall vest on December 8, 2022, provided the Reporting Person continues to have a service relationship with the Issuer at such time. Thereafter, the remaining seventy-five percent (75%) of the restricted stock units shall vest in 12 equal quarterly installments starting on March 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-24-000171 · wk-form4_1726094547.xml · nonDerivative · entry 4

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,033

F2 · shares: These shares were retained by 1stdibs, Inc. ("1stdibs") via settlement on a net withholding basis in order to meet the tax withholding obligations of the reporting person in connection with the vesting of an installment of restricted stock units ("RSUs") granted to the reporting person on December 9, 2021, March 14, 2023, and March 15, 2024. None of these shares were sold in an open market transaction.

SEC source: 0001600641-24-000171 · wk-form4_1726094547.xml · nonDerivative · entry 3

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,676

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 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

SEC source: 0001600641-24-000171 · wk-form4_1726094547.xml · nonDerivative · entry 2

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,588

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 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

SEC source: 0001600641-24-000171 · wk-form4_1726094547.xml · nonDerivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,383

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 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

SEC source: 0001600641-24-000146 · wk-form4_1718748184.xml · nonDerivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 24,479

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan, adopted September 15, 2023.

SEC source: 0001600641-24-000184 · wk-form4a_1728433990.xml · nonDerivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 24,479

F1 · kind: The sales reported on this Form 4 were previously reported in a timely manner and had been described as effected pursuant to a Rule 10b5-1 trading plan, adopted September 15, 2023. The sales of some of the shares were effected pursuant to a Rule 10b5-1 trading plan, adopted September 15, 2023, and also incorporated the non-discretionary sales of shares that were not part of such Rule 10b5-1 trading plan that had been inadvertently executed by the broker in accordance with plan directions. All other information regarding the sales was accurately reported.

SEC source: 0001600641-24-000139 · wk-form4_1718235751.xml · derivative · entry 5

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 99,963

Underlying: Common Stock · 9,087 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F5 · derivative.exercise_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2024, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F5 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2024, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-24-000139 · wk-form4_1718235751.xml · derivative · entry 4

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,433

Underlying: Common Stock · 9,204 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4 · derivative.exercise_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F4 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-24-000139 · wk-form4_1718235751.xml · derivative · entry 3

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,425

Underlying: Common Stock · 2,904 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F3 · derivative.exercise_date: Twenty-five percent (25%) of the restricted stock units shall vest on December 8, 2022, provided the Reporting Person continues to have a service relationship with the Issuer at such time. Thereafter, the remaining seventy-five percent (75%) of the restricted stock units shall vest in 12 equal quarterly installments starting on March 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F3 · derivative.expiration_date: Twenty-five percent (25%) of the restricted stock units shall vest on December 8, 2022, provided the Reporting Person continues to have a service relationship with the Issuer at such time. Thereafter, the remaining seventy-five percent (75%) of the restricted stock units shall vest in 12 equal quarterly installments starting on March 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-24-000139 · wk-form4_1718235751.xml · nonDerivative · entry 2

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,900

F2 · shares: These shares were retained by 1stdibs, Inc. ("1stdibs") via settlement on a net withholding basis in order to meet the tax withholding obligations of the reporting person in connection with the vesting of an installment of restricted stock units ("RSUs") granted to the reporting person on December 9, 2021, March 14, 2023, and March 15, 2024. None of these shares were sold in an open market transaction.

SEC source: 0001600641-24-000139 · wk-form4_1718235751.xml · nonDerivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,542

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 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

SEC source: 0001600641-24-000054 · wk-form4_1710982169.xml · nonDerivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,347

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan, adopted September 15, 2023.

SEC source: 0001600641-24-000047 · wk-form4_1710898505.xml · derivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 109,050

Underlying: Common Stock · 109,050 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F2 · derivative.exercise_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2024, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F2 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2024, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-24-000037 · wk-form4_1710293266.xml · derivative · entry 4

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,637

Underlying: Common Stock · 9,205 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4 · derivative.exercise_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F4 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-24-000037 · wk-form4_1710293266.xml · derivative · entry 3

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,329

Underlying: Common Stock · 2,904 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F3 · derivative.exercise_date: Twenty-five percent (25%) of the restricted stock units shall vest on December 8, 2022, provided the Reporting Person continues to have a service relationship with the Issuer at such time. Thereafter, the remaining seventy-five percent (75%) of the restricted stock units shall vest in 12 equal quarterly installments starting on March 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F3 · derivative.expiration_date: Twenty-five percent (25%) of the restricted stock units shall vest on December 8, 2022, provided the Reporting Person continues to have a service relationship with the Issuer at such time. Thereafter, the remaining seventy-five percent (75%) of the restricted stock units shall vest in 12 equal quarterly installments starting on March 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

SEC source: 0001600641-24-000037 · wk-form4_1710293266.xml · nonDerivative · entry 2

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,444

F2 · shares: These shares were retained by 1stdibs, Inc. ("1stdibs") via settlement on a net withholding basis in order to meet the tax withholding obligations of the reporting person in connection with the vesting of an installment of restricted stock units ("RSUs") granted to the reporting person on December 9, 2021 and March 14, 2023. None of these shares were sold in an open market transaction.

SEC source: 0001600641-24-000037 · wk-form4_1710293266.xml · nonDerivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,810

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 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

SEC source: 0001600641-23-000246 · wk-form4_1703014012.xml · nonDerivative · entry 1

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 11,701

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan, adopted September 15, 2023.

SEC source: 0001600641-23-000237 · wk-form4_1702429935.xml · derivative · entry 4

Rubinger Matthew · CIK 0001898365 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,233

Underlying: Common Stock · 2,904 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4 · derivative.exercise_date: Twenty-five percent (25%) of the restricted stock units shall vest on December 8, 2022, provided the Reporting Person continues to have a service relationship with the Issuer at such time. Thereafter, the remaining seventy-five percent (75%) of the restricted stock units shall vest in 12 equal quarterly installments starting on March 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

F4 · derivative.expiration_date: Twenty-five percent (25%) of the restricted stock units shall vest on December 8, 2022, provided the Reporting Person continues to have a service relationship with the Issuer at such time. Thereafter, the remaining seventy-five percent (75%) of the restricted stock units shall vest in 12 equal quarterly installments starting on March 8, 2023, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.