Thomas J. Etergino - 08 Sep 2026 Form 4 Insider Report for 1stdibs.com, Inc. (DIBS)

Reporting relationship: Chief Financial Officer
Issuer ticker: DIBS
Reported as of: 08 Sep 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 10 Sep 2026, 18:15:02 UTC
Prior SEC filing: 10 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Melanie Goins, Attorney-In-Fact for Thomas J Etergino

Key filing fact

Thomas J. Etergino filed Form 4 for 1stdibs.com, Inc. (DIBS) on 10 Sep 2026.

Key facts

This page summarizes Thomas J. Etergino's Form 4 filing for 1stdibs.com, Inc. (DIBS).
7 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 10 Sep 2026, 18:15.

Change

Previous filing in this sequence was filed on 10 Jun 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001336088 Primary reporting owner

Etergino Thomas J

Relationship: Chief Financial Officer
Address: 300 PARK AVENUE SOUTH, 10TH FLOOR, NEW YORK
Signature: /s/ Melanie Goins, Attorney-In-Fact for Thomas J Etergino
Signature date: 10 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

DIBS transaction

Common Stock

Options Exercise

Transaction value
Shares: +12,125
Change %: +3.6%
Price
Shares after: 345,545
Date: 08 Sep 2026
Ownership: Direct
Footnotes: F1

DIBS transaction

Common Stock

Options Exercise

Transaction value
Shares: +11,172
Change %: +3.2%
Price
Shares after: 356,717
Date: 08 Sep 2026
Ownership: Direct
Footnotes: F1

DIBS transaction

Common Stock

Options Exercise

Transaction value
Shares: +11,175
Change %: +3.1%
Price
Shares after: 367,892
Date: 08 Sep 2026
Ownership: Direct
Footnotes: F1

DIBS transaction

Common Stock

Tax liability

Transaction value
Shares: -17,599
Change %: -4.8%
Price: $4.73^*
Shares after: 350,293
Date: 08 Sep 2026
Ownership: Direct
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

DIBS transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -12,125
Change %: -9.1%
Price: $0.000000^*
Shares after: 121,250
Date: 08 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 12,125
Exercise price
Footnotes: F1, F3

DIBS transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -11,172
Change %: -9.1%
Price: $0.000000^*
Shares after: 111,719
Date: 08 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 11,172
Exercise price
Footnotes: F1, F4

DIBS transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -11,175
Change %: -14%
Price: $0.000000^*
Shares after: 67,050
Date: 08 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 11,175
Exercise price
Footnotes: F1, F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

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

Footnote 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.

Footnote 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.

Footnote 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.

Footnote 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.