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Etergino Thomas J

Disclosed activity across 1 company

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39599
SEC CIK
0001336088

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
1stdibs.com, Inc.DIBS · Entity 6526Chief Financial OfficerSeptember 08, 2026September 10, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

1stdibs.com, Inc.

Report date September 08, 2026 · Filed September 10, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect350,293 Ending reported balance After 2026-09-08 transaction · row 4
4 source rows · reconciled sequence

Row 1 · 2026-09-08 · Exercise / conversion · Acquired 12,125 · Balance 345,545

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

Row 2 · 2026-09-08 · Exercise / conversion · Acquired 11,172 · Balance 356,717

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

Row 3 · 2026-09-08 · Exercise / conversion · Acquired 11,175 · Balance 367,892

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

Row 4 · 2026-09-08 · Tax withholding · Disposed 17,599 · Balance 350,293

F2: These shares were retained by Issuer 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 March 15, 2024, March 13, 2025, and March 13, 2026. None of these shares were sold in an open market transaction.

Restricted Stock UnitsSEC Table II · derivative / convertible securityDirect121,250 Reported balance After 2026-09-08 transaction · row 5 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 5 · 2026-09-08 · Exercise / conversion · Disposed 12,125 · Balance 121,250

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

F3: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2026, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

Restricted Stock UnitsSEC Table II · derivative / convertible securityDirect111,719 Reported balance After 2026-09-08 transaction · row 6 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 6 · 2026-09-08 · Exercise / conversion · Disposed 11,172 · Balance 111,719

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

F4: The initial number of restricted stock units granted shall vest in 16 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.

Restricted Stock UnitsSEC Table II · derivative / convertible securityDirect67,050 Reported balance After 2026-09-08 transaction · row 7 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 7 · 2026-09-08 · Exercise / conversion · Disposed 11,175 · Balance 67,050

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

F5: The initial number of restricted stock units granted shall vest in 16 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.

Filing footnotes · ownership attribution and instrument terms

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

F2: These shares were retained by Issuer 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 March 15, 2024, March 13, 2025, and March 13, 2026. None of these shares were sold in an open market transaction.

F3: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2026, 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: The initial number of restricted stock units granted shall vest in 16 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.

F5: The initial number of restricted stock units granted shall vest in 16 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.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
September 08, 2026 Filed Sep 10, 2026 22:15 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 11,175 $0.00 $0.00
Disclosure

SEC source: 0001336088-26-000009 · wk-form4_1789078499.xml · derivative · entry 7

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,050

Underlying: Common Stock · 11,175 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 16 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 16 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.

Read SEC document
September 08, 2026 Filed Sep 10, 2026 22:15 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 11,172 $0.00 $0.00
Disclosure

SEC source: 0001336088-26-000009 · wk-form4_1789078499.xml · derivative · entry 6

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 111,719

Underlying: Common Stock · 11,172 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 16 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.

F4 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 16 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.

Read SEC document
September 08, 2026 Filed Sep 10, 2026 22:15 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 12,125 $0.00 $0.00
Disclosure

SEC source: 0001336088-26-000009 · wk-form4_1789078499.xml · derivative · entry 5

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 121,250

Underlying: Common Stock · 12,125 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: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2026, 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: The initial number of restricted stock units granted shall vest in 12 equal quarterly installments starting on June 8, 2026, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

Read SEC document
September 08, 2026 Filed Sep 10, 2026 22:15 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Tax withholdingCommon Stock 17,599 $4.73 $83,243.27
Disclosure

SEC source: 0001336088-26-000009 · wk-form4_1789078499.xml · nonDerivative · entry 4

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 350,293

F2 · price: These shares were retained by Issuer 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 March 15, 2024, March 13, 2025, and March 13, 2026. None of these shares were sold in an open market transaction.

Read SEC document
September 08, 2026 Filed Sep 10, 2026 22:15 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 11,175 Not disclosed Not disclosed
Disclosure

SEC source: 0001336088-26-000009 · wk-form4_1789078499.xml · nonDerivative · entry 3

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 367,892

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.

Read SEC document
September 08, 2026 Filed Sep 10, 2026 22:15 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 11,172 Not disclosed Not disclosed
Disclosure

SEC source: 0001336088-26-000009 · wk-form4_1789078499.xml · nonDerivative · entry 2

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 356,717

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.

Read SEC document
September 08, 2026 Filed Sep 10, 2026 22:15 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 12,125 Not disclosed Not disclosed
Disclosure

SEC source: 0001336088-26-000009 · wk-form4_1789078499.xml · nonDerivative · entry 1

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 345,545

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.

Read SEC document
June 08, 2026 Filed Jun 10, 2026 15:20 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 16,563 $0.00 $0.00
Disclosure

SEC source: 0001336088-26-000006 · wk-form4_1781104812.xml · derivative · entry 9

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 16,563 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: Twenty-five percent (25%) of the restricted stock units shall vest on June 8, 2023, 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 September 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.

F6 · derivative.expiration_date: Twenty-five percent (25%) of the restricted stock units shall vest on June 8, 2023, 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 September 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.

Read SEC document
June 08, 2026 Filed Jun 10, 2026 15:20 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 12,125 $0.00 $0.00
Disclosure

SEC source: 0001336088-26-000006 · wk-form4_1781104812.xml · derivative · entry 8

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 133,375

Underlying: Common Stock · 12,125 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, 2026, 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, 2026, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

Read SEC document
June 08, 2026 Filed Jun 10, 2026 15:20 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 11,172 $0.00 $0.00
Disclosure

SEC source: 0001336088-26-000006 · wk-form4_1781104812.xml · derivative · entry 7

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 122,891

Underlying: Common Stock · 11,172 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 16 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.

F4 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 16 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.

Read SEC document
June 08, 2026 Filed Jun 10, 2026 15:20 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 11,175 $0.00 $0.00
Disclosure

SEC source: 0001336088-26-000006 · wk-form4_1781104812.xml · derivative · entry 6

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 78,225

Underlying: Common Stock · 11,175 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: The initial number of restricted stock units granted shall vest in 16 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.

F3 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 16 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.

Read SEC document
June 08, 2026 Filed Jun 10, 2026 15:20 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Tax withholdingCommon Stock 18,400 $4.01 $73,784.00
Disclosure

SEC source: 0001336088-26-000006 · wk-form4_1781104812.xml · nonDerivative · entry 5

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 333,420

F2 · price: These shares were retained by Issuer 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 June 2, 2022, March 14, 2023, March 15, 2025, and March 16, 2026. None of these shares were sold in an open market transaction.

Read SEC document
June 08, 2026 Filed Jun 10, 2026 15:20 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 16,563 Not disclosed Not disclosed
Disclosure

SEC source: 0001336088-26-000006 · wk-form4_1781104812.xml · nonDerivative · entry 4

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 351,820

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.

Read SEC document
June 08, 2026 Filed Jun 10, 2026 15:20 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 12,125 Not disclosed Not disclosed
Disclosure

SEC source: 0001336088-26-000006 · wk-form4_1781104812.xml · nonDerivative · entry 3

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 335,257

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.

Read SEC document
June 08, 2026 Filed Jun 10, 2026 15:20 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 11,172 Not disclosed Not disclosed
Disclosure

SEC source: 0001336088-26-000006 · wk-form4_1781104812.xml · nonDerivative · entry 2

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 323,132

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.

Read SEC document
June 08, 2026 Filed Jun 10, 2026 15:20 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 11,175 Not disclosed Not disclosed
Disclosure

SEC source: 0001336088-26-000006 · wk-form4_1781104812.xml · nonDerivative · entry 1

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 311,960

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.

Read SEC document
March 13, 2026 Filed Mar 17, 2026 23:56 UTC 1stdibs.com, Inc. DIBS · Entity 6526 GrantRestricted Stock Units · Derivative 145,500 $0.00 $0.00
Disclosure

SEC source: 0001336088-26-000004 · wk-form4_1773791807.xml · derivative · entry 1

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 145,500

Underlying: Common Stock · 145,500 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, 2026, 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, 2026, provided the Reporting Person continues to have a service relationship with the Issuer at such time. The restricted stock units have no expiration date.

Read SEC document
March 09, 2026 Filed Mar 12, 2026 00:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 11,172 $0.00 $0.00
Disclosure

SEC source: 0001336088-26-000002 · wk-form4_1773273936.xml · derivative · entry 9

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 134,063

Underlying: Common Stock · 11,172 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 16 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.

F6 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 16 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.

Read SEC document
March 09, 2026 Filed Mar 12, 2026 00:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 11,175 $0.00 $0.00
Disclosure

SEC source: 0001336088-26-000002 · wk-form4_1773273936.xml · derivative · entry 8

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 89,400

Underlying: Common Stock · 11,175 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 16 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 16 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.

Read SEC document
March 09, 2026 Filed Mar 12, 2026 00:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 16,562 $0.00 $0.00
Disclosure

SEC source: 0001336088-26-000002 · wk-form4_1773273936.xml · derivative · entry 7

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,563

Underlying: Common Stock · 16,562 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 June 8, 2023, 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 September 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 June 8, 2023, 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 September 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.

Read SEC document
March 09, 2026 Filed Mar 12, 2026 00:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 14,104 $0.00 $0.00
Disclosure

SEC source: 0001336088-26-000002 · wk-form4_1773273936.xml · derivative · entry 6

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 14,104 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: 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.

F3 · 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.

Read SEC document
March 09, 2026 Filed Mar 12, 2026 00:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Tax withholdingCommon Stock 19,113 $5.49 $104,930.37
Disclosure

SEC source: 0001336088-26-000002 · wk-form4_1773273936.xml · nonDerivative · entry 5

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 300,785

F2 · price: These shares were retained by Issuer 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 June 2, 2022, March 14, 2023, and March 15, 2025. None of these shares were sold in an open market transaction.

Read SEC document
March 09, 2026 Filed Mar 12, 2026 00:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 11,172 Not disclosed Not disclosed
Disclosure

SEC source: 0001336088-26-000002 · wk-form4_1773273936.xml · nonDerivative · entry 4

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 319,898

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.

Read SEC document
March 09, 2026 Filed Mar 12, 2026 00:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 11,175 Not disclosed Not disclosed
Disclosure

SEC source: 0001336088-26-000002 · wk-form4_1773273936.xml · nonDerivative · entry 3

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 308,726

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.

Read SEC document
March 09, 2026 Filed Mar 12, 2026 00:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 16,562 Not disclosed Not disclosed
Disclosure

SEC source: 0001336088-26-000002 · wk-form4_1773273936.xml · nonDerivative · entry 2

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 297,551

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.

Read SEC document
March 09, 2026 Filed Mar 12, 2026 00:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 14,104 Not disclosed Not disclosed
Disclosure

SEC source: 0001336088-26-000002 · wk-form4_1773273936.xml · nonDerivative · entry 1

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 280,989

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.

Read SEC document
December 08, 2025 Filed Dec 10, 2025 14:08 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 11,172 $0.00 $0.00
Disclosure

SEC source: 0001336088-25-000004 · wk-form4_1765375735.xml · derivative · entry 9

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 145,235

Underlying: Common Stock · 11,172 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 16 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.

F6 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 16 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.

Read SEC document
December 08, 2025 Filed Dec 10, 2025 14:08 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 11,175 $0.00 $0.00
Disclosure

SEC source: 0001336088-25-000004 · wk-form4_1765375735.xml · derivative · entry 8

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 100,575

Underlying: Common Stock · 11,175 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 16 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 16 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.

Read SEC document
December 08, 2025 Filed Dec 10, 2025 14:08 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 14,104 $0.00 $0.00
Disclosure

SEC source: 0001336088-25-000004 · wk-form4_1765375735.xml · derivative · entry 7

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,104

Underlying: Common Stock · 14,104 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.

Read SEC document
December 08, 2025 Filed Dec 10, 2025 14:08 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 16,563 $0.00 $0.00
Disclosure

SEC source: 0001336088-25-000004 · wk-form4_1765375735.xml · derivative · entry 6

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,125

Underlying: Common Stock · 16,563 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 June 8, 2023, 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 September 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 June 8, 2023, 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 September 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.

Read SEC document
December 08, 2025 Filed Dec 10, 2025 14:08 UTC 1stdibs.com, Inc. DIBS · Entity 6526 SaleCommon Stock 27,066 $5.96 $161,313.36
Disclosure

SEC source: 0001336088-25-000004 · wk-form4_1765375735.xml · nonDerivative · entry 5

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 266,885

F2 · shares: These shares were retained by Issuer 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 June 2, 2022, March 14, 2023, and March 15, 2025. None of these shares were sold in an open market transaction.

Read SEC document
December 08, 2025 Filed Dec 10, 2025 14:08 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 11,172 Not disclosed Not disclosed
Disclosure

SEC source: 0001336088-25-000004 · wk-form4_1765375735.xml · nonDerivative · entry 4

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 293,951

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.

Read SEC document
December 08, 2025 Filed Dec 10, 2025 14:08 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 11,175 Not disclosed Not disclosed
Disclosure

SEC source: 0001336088-25-000004 · wk-form4_1765375735.xml · nonDerivative · entry 3

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 282,779

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.

Read SEC document
December 08, 2025 Filed Dec 10, 2025 14:08 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 14,104 Not disclosed Not disclosed
Disclosure

SEC source: 0001336088-25-000004 · wk-form4_1765375735.xml · nonDerivative · entry 2

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 271,604

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.

Read SEC document
December 08, 2025 Filed Dec 10, 2025 14:08 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 16,563 Not disclosed Not disclosed
Disclosure

SEC source: 0001336088-25-000004 · wk-form4_1765375735.xml · nonDerivative · entry 1

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 257,500

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.

Read SEC document
September 08, 2025 Filed Sep 10, 2025 22:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 11,172 $0.00 $0.00
Disclosure

SEC source: 0001600641-25-000124 · wk-form4_1757541903.xml · derivative · entry 9

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 156,407

Underlying: Common Stock · 11,172 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 16 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.

F6 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 16 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.

Read SEC document
September 08, 2025 Filed Sep 10, 2025 22:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 11,175 $0.00 $0.00
Disclosure

SEC source: 0001600641-25-000124 · wk-form4_1757541903.xml · derivative · entry 8

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 111,750

Underlying: Common Stock · 11,175 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 16 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 16 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.

Read SEC document
September 08, 2025 Filed Sep 10, 2025 22:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 14,104 $0.00 $0.00
Disclosure

SEC source: 0001600641-25-000124 · wk-form4_1757541903.xml · derivative · entry 7

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,208

Underlying: Common Stock · 14,104 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.

Read SEC document
September 08, 2025 Filed Sep 10, 2025 22:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 16,562 $0.00 $0.00
Disclosure

SEC source: 0001600641-25-000124 · wk-form4_1757541903.xml · derivative · entry 6

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,688

Underlying: Common Stock · 16,562 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 June 8, 2023, 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 September 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 June 8, 2023, 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 September 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.

Read SEC document
September 08, 2025 Filed Sep 10, 2025 22:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 SaleCommon Stock 19,391 $2.80 $54,294.80
Disclosure

SEC source: 0001600641-25-000124 · wk-form4_1757541903.xml · nonDerivative · entry 5

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 240,937

F2 · shares: These shares were retained by Issuer 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 June 2, 2022, March 14, 2023, and March 15, 2025. None of these shares were sold in an open market transaction.

Read SEC document
September 08, 2025 Filed Sep 10, 2025 22:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 11,172 Not disclosed Not disclosed
Disclosure

SEC source: 0001600641-25-000124 · wk-form4_1757541903.xml · nonDerivative · entry 4

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 260,328

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.

Read SEC document
September 08, 2025 Filed Sep 10, 2025 22:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 11,175 Not disclosed Not disclosed
Disclosure

SEC source: 0001600641-25-000124 · wk-form4_1757541903.xml · nonDerivative · entry 3

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 249,156

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.

Read SEC document
September 08, 2025 Filed Sep 10, 2025 22:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 14,104 Not disclosed Not disclosed
Disclosure

SEC source: 0001600641-25-000124 · wk-form4_1757541903.xml · nonDerivative · entry 2

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 237,981

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.

Read SEC document
September 08, 2025 Filed Sep 10, 2025 22:05 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 16,562 Not disclosed Not disclosed
Disclosure

SEC source: 0001600641-25-000124 · wk-form4_1757541903.xml · nonDerivative · entry 1

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 223,877

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.

Read SEC document
June 09, 2025 Filed Jun 12, 2025 01:34 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 11,171 $0.00 $0.00
Disclosure

SEC source: 0001600641-25-000104 · wk-form4_1749692064.xml · derivative · entry 9

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 167,579

Underlying: Common Stock · 11,171 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 16 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.

F6 · derivative.expiration_date: The initial number of restricted stock units granted shall vest in 16 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.

Read SEC document
June 09, 2025 Filed Jun 12, 2025 01:34 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 11,175 $0.00 $0.00
Disclosure

SEC source: 0001600641-25-000104 · wk-form4_1749692064.xml · derivative · entry 8

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 122,925

Underlying: Common Stock · 11,175 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 16 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 16 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.

Read SEC document
June 09, 2025 Filed Jun 12, 2025 01:34 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 14,103 $0.00 $0.00
Disclosure

SEC source: 0001600641-25-000104 · wk-form4_1749692064.xml · derivative · entry 7

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,312

Underlying: Common Stock · 14,103 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.

Read SEC document
June 09, 2025 Filed Jun 12, 2025 01:34 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionRestricted Stock Units · Derivative 16,563 $0.00 $0.00
Disclosure

SEC source: 0001600641-25-000104 · wk-form4_1749692064.xml · derivative · entry 6

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,250

Underlying: Common Stock · 16,563 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 June 8, 2023, 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 September 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 June 8, 2023, 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 September 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.

Read SEC document
June 09, 2025 Filed Jun 12, 2025 01:34 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Tax withholdingCommon Stock 19,113 $2.95 $56,383.35
Disclosure

SEC source: 0001600641-25-000104 · wk-form4_1749692064.xml · nonDerivative · entry 5

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 207,315

F2 · shares: These shares were retained by Issuer 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 granted to the reporting person on June 2, 2022, March 14, 2023, and March 15, 2025. None of these shares were sold in an open market transaction.

Read SEC document
June 09, 2025 Filed Jun 12, 2025 01:34 UTC 1stdibs.com, Inc. DIBS · Entity 6526 Exercise / conversionCommon Stock 11,171 Not disclosed Not disclosed
Disclosure

SEC source: 0001600641-25-000104 · wk-form4_1749692064.xml · nonDerivative · entry 4

Etergino Thomas J · CIK 0001336088 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 226,428

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.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.