1stdibs.com (DIBS) CFO exercises 53,013 RSUs; 19,113 shares withheld for tax

Rhea-AI Filing Summary

1stdibs.com, Inc. Chief Financial Officer Thomas J. Etergino exercised restricted stock units into common stock and had shares withheld for taxes. He converted a total of 53,013 RSUs into the same number of common shares. Of these, 19,113 shares were retained by the company to satisfy tax withholding obligations in connection with vesting, and none were sold in an open market transaction. Following these transactions, he directly holds 300,785 shares of common stock and 134,063 restricted stock units, which continue to vest over time as long as his service relationship with the company continues.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Etergino Thomas J

(Last) (First) (Middle)

300 PARK AVENUE SOUTH

10TH FLOOR

(Street)

NEW YORK NY 10010

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
1stdibs.com, Inc. [ DIBS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

3. Date of Earliest Transaction (Month/Day/Year)
03/09/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/09/2026		M		14,104	A	(1)	280,989	D
Common Stock	03/09/2026		M		16,562	A	(1)	297,551	D
Common Stock	03/09/2026		M		11,175	A	(1)	308,726	D
Common Stock	03/09/2026		M		11,172	A	(1)	319,898	D
Common Stock	03/09/2026		F		19,113	D	$5.49(2)	300,785	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(1)	03/09/2026		M			14,104	(3)	(3)	Common Stock	14,104	$0	0	D
Restricted Stock Units	(1)	03/09/2026		M			16,562	(4)	(4)	Common Stock	16,562	$0	16,563	D
Restricted Stock Units	(1)	03/09/2026		M			11,175	(5)	(5)	Common Stock	11,175	$0	89,400	D
Restricted Stock Units	(1)	03/09/2026		M			11,172	(6)	(6)	Common Stock	11,172	$0	134,063	D

Explanation of Responses:

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

2. 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.

3. 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.

4. 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.

5. 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.

6. 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.

Remarks:

	/s/ Melanie Goins, Attorney-In-Fact for Thomas J Etergino	03/11/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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FAQ

What insider transactions did 1stdibs.com (DIBS) report for its CFO?

The CFO, Thomas J. Etergino, exercised restricted stock units into common stock and had shares withheld for taxes. He converted 53,013 RSUs into 53,013 common shares, with 19,113 shares retained by the company to cover tax obligations related to vesting.

How many shares did the 1stdibs.com (DIBS) CFO acquire through RSU exercises?

He acquired 53,013 shares of common stock through the exercise of restricted stock units. These came from multiple RSU grants that vested on March 9, 2026, and were settled at a conversion price of $0.0000 per share, reflecting standard equity compensation mechanics.

Were any 1stdibs.com (DIBS) CFO shares sold on the open market in this Form 4?

No open market sales occurred. The 19,113 common shares labeled with transaction code F were retained by the company to satisfy tax withholding obligations on vesting RSUs, and a footnote explicitly states that none of these shares were sold in an open market transaction.

How many 1stdibs.com (DIBS) shares does the CFO hold after these transactions?

After the reported transactions, the CFO directly holds 300,785 shares of common stock. He also has 134,063 restricted stock units outstanding, which represent contingent rights to receive an equal number of common shares as they vest over future quarterly installments.

What are the vesting terms of the 1stdibs.com (DIBS) CFO’s restricted stock units?

His RSU grants vest in structured quarterly installments, starting on specific dates such as June 8, 2023, September 8, 2023, June 8, 2024, and June 8, 2025. Vesting continues only while he maintains a service relationship with 1stdibs.com, and the RSUs have no expiration date.

Why were 19,113 1stdibs.com (DIBS) shares withheld in the CFO’s Form 4?

The 19,113 shares were withheld to satisfy tax withholding obligations triggered by the vesting of RSUs granted on June 2, 2022, March 14, 2023, and March 15, 2025. A footnote clarifies these shares were retained by the issuer and not sold in the market.