[SCHEDULE 13G/A] 1stdibs.com, Inc. SEC Filing

Rhea-AI Filing Summary

1stdibs.com, Inc. Schedule 13G/A reports ownership details for common stock (CUSIP 320551104). David S. Rosenblatt reports sole beneficial ownership of 3,904,520 shares, representing 10.2% of the class. Two trusts are also reported: the 2012 David Rosenblatt Family Trust holds 665,302 shares (1.8%) and Bessemer Trust Company of Delaware as trustee for the 2024 Laura Thalheimer Rosenblatt Family Trust holds 22,500 shares (0.1%).

The filing states Mr. Rosenblatt disclaims beneficial ownership of shares held by the Trusts except to the extent of any pecuniary interest and clarifies he has no voting or dispositive power over the Trusts' shares. Signatures for the reporting persons are dated 08/14/2025.

Positive

• David S. Rosenblatt beneficially owns 3,904,520 shares, representing 10.2% of 1stdibs.com, Inc.'s common stock
• 2012 David Rosenblatt Family Trust holds 665,302 shares (1.8%), disclosed separately
• Bessemer Trust (2024 Laura Thalheimer Rosenblatt Family Trust) holds 22,500 shares (0.1%), disclosed separately

Negative

• None.

Insights

Financial Analyst

TL;DR: Insider stake of 10.2% by the CEO-level reporting person is a material ownership disclosure but not a transaction update.

The Schedule 13G/A discloses that David S. Rosenblatt beneficially owns 3,904,520 shares, equal to 10.2% of 1stdibs.com, Inc.'s outstanding common stock. This level of ownership is above the 5% threshold that triggers Section 13 reporting and is therefore material from a disclosure perspective. The filing does not report purchases, sales, or changes in position within this amendment text, nor does it provide voting changes beyond disclaimers regarding the Trust-held shares. For investors, the key takeaway is the presence of a significant passive stake rather than any active change in control or recent trading activity.

Corporate Governance Expert

TL;DR: Filing clarifies ownership and disclaimers; trusts hold additional shares but the reporting person disclaims control over them.

The document clarifies that while two family trusts are reported, Mr. Rosenblatt disclaims voting and dispositive power over the Trusts' shares except to the extent of any pecuniary interest. The trusts are identified with jurisdictions (New York and Delaware) and hold 1.8% and 0.1% respectively. This is a routine 13G amendment focusing on ownership disclosure and legal attribution of beneficial ownership rather than governance actions or agreements affecting control.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

1stdibs.com, Inc.

(Name of Issuer)

Common Stock, $0.01 par value per share

(Title of Class of Securities)

320551104

(CUSIP Number)

06/30/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 320551104

1

Names of Reporting Persons

David S. Rosenblatt

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 3,904,520.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 3,904,520.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,904,520.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

10.2 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

CUSIP No. 320551104

1

Names of Reporting Persons

Bessemer Trust Company of Delaware, N.A., as Trustee of the 2024 Laura Thalheimer Rosenblatt Family Trust u/a/d April 1, 2024

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 22,500.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 22,500.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

22,500.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.1 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 320551104

1

Names of Reporting Persons

2012 David Rosenblatt Family Trust dated November 30, 2012

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

NEW YORK

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 665,302.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 665,302.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

665,302.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

1.8 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

Item 1.
(a)	Name of issuer: 1stdibs.com, Inc.
(b)	Address of issuer's principal executive offices: 300 PARK AVENUE SOUTH, 10TH FLOOR, NEW YORK, NY, 10010
Item 2.
(a)	Name of person filing: David S. Rosenblatt 2012 David Rosenblatt Family Trust dated November 30, 2012 Bessemer Trust Company of Delaware, N.A., as Trustee of the 2024 Laura Thalheimer Rosenblatt Family Trust u/a/d April 1, 2024
(b)	Address or principal business office or, if none, residence: c/o 1stdibs.com, Inc. 300 Park Avenue South 10th Floor New York, New York 10010
(c)	Citizenship: David S. Rosenblatt is a citizen of the United States of America. The 2012 David Rosenblatt Family Trust dated November 30, 2012 is formed under the laws of the State of New York. The 2024 Laura Thalheimer Rosenblatt Family Trust u/a/d April 1, 2024 is administered under the laws of the State of Delaware.
(d)	Title of class of securities: Common Stock, $0.01 par value per share
(e)	CUSIP No.: 320551104
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: The responses to questions 5 through 9 and 11 on the cover pages are incorporated by reference into this Item 4. David S. Rosenblatt has no voting or dispositive power over shares of Common Stock held by the 2012 David Rosenblatt Family Trust dated November 30, 2012 or the 2024 Laura Thalheimer Rosenblatt Family Trust effective April 1, 2024 (collectively, the "Trusts"). Mr Rosenblatt disclaims beneficial ownership of the shares of Common Stock held by the Trusts, except to the extent of his pecuniary interest therein. The filing of this Amendment No. 3 to Schedule 13G (this "Amendment") shall not be deemed an admission that Mr. Rosenblatt is, for purposes of Section 13(g) of the Securities Exchange Act of 1934, as amended, or otherwise, the beneficial owner of any equity securities held by the Trusts and covered by this Amendment.
(b)	Percent of class: The responses to questions 5 through 9 and 11 on the cover pages are incorporated by reference into this Item 4. David S. Rosenblatt has no voting or dispositive power over shares of Common Stock held by the Trusts. Mr Rosenblatt disclaims beneficial ownership of the shares of Common Stock held by the Trusts, except to the extent of his pecuniary interest therein. The filing of this Amendment shall not be deemed an admission that Mr. Rosenblatt is, for purposes of Section 13(g) of the Securities Exchange Act of 1934, as amended, or otherwise, the beneficial owner of any equity securities held by the Trusts and covered by this Amendment.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: The responses to questions 5 through 9 and 11 on the cover pages are incorporated by reference into this Item 4. David S. Rosenblatt has no voting or dispositive power over shares of Common Stock held by the Trusts. 2012 David Rosenblatt Family Trust dated November 30, 2012 or the 2024 Laura Thalheimer Rosenblatt Family Trust effective April 1, 2024 (collectively, the "Trusts"). Mr Rosenblatt disclaims beneficial ownership of the shares of Common Stock held by the Trusts, except to the extent of his pecuniary interest therein. The filing of this Amendment shall not be deemed an admission that Mr. Rosenblatt is, for purposes of Section 13(g) of the Securities Exchange Act of 1934, as amended, or otherwise, the beneficial owner of any equity securities held by the Trusts and covered by this Amendment.
	(ii) Shared power to vote or to direct the vote: The responses to questions 5 through 9 and 11 on the cover pages are incorporated by reference into this Item 4. David S. Rosenblatt has no voting or dispositive power over shares of Common Stock held by the Trusts. Mr Rosenblatt disclaims beneficial ownership of the shares of Common Stock held by the Trusts, except to the extent of his pecuniary interest therein. The filing of this Amendment shall not be deemed an admission that Mr. Rosenblatt is, for purposes of Section 13(g) of the Securities Exchange Act of 1934, as amended, or otherwise, the beneficial owner of any equity securities held by the Trusts and covered by this Amendment.
	(iii) Sole power to dispose or to direct the disposition of: The responses to questions 5 through 9 and 11 on the cover pages are incorporated by reference into this Item 4. David S. Rosenblatt has no voting or dispositive power over shares of Common Stock held by the Trusts. Mr Rosenblatt disclaims beneficial ownership of the shares of Common Stock held by the Trusts, except to the extent of his pecuniary interest therein. The filing of this Amendment shall not be deemed an admission that Mr. Rosenblatt is, for purposes of Section 13(g) of the Securities Exchange Act of 1934, as amended, or otherwise, the beneficial owner of any equity securities held by the Trusts and covered by this Amendment.
	(iv) Shared power to dispose or to direct the disposition of: The responses to questions 5 through 9 and 11 on the cover pages are incorporated by reference into this Item 4. David S. Rosenblatt has no voting or dispositive power over shares of Common Stock held by the Trusts. Mr Rosenblatt disclaims beneficial ownership of the shares of Common Stock held by the Trusts, except to the extent of his pecuniary interest therein. The filing of this Amendment shall not be deemed an admission that Mr. Rosenblatt is, for purposes of Section 13(g) of the Securities Exchange Act of 1934, as amended, or otherwise, the beneficial owner of any equity securities held by the Trusts and covered by this Amendment.
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Not applicable.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. Not applicable.
Item 8.	Identification and Classification of Members of the Group.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(J), so indicate under Item 3(j) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. Not applicable.
Item 9.	Notice of Dissolution of Group.
	Notice of dissolution of a group may be furnished as an exhibit stating the date of the dissolution and that all further filings with respect to transactions in the security reported on will be filed, if required, by members of the group, in their individual capacity. See Item 5. Not applicable.

Item 10. Certifications:

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

David S. Rosenblatt

Signature:	David S. Rosenblatt
Name/Title:	David S. Rosenblatt
Date:	08/14/2025

Bessemer Trust Company of Delaware, N.A., as Trustee of the 2024 Laura Thalheimer Rosenblatt Family Trust u/a/d April 1, 2024

Signature:	Bessemer Trust Company of Delaware, N.A., as Trustee of the 2024 Laura Thalheimer Rosenblatt Family Trust u/a/d April 1, 2024
Name/Title:	By: Emily Nelson Its: Associate Vice President
Date:	08/14/2025

2012 David Rosenblatt Family Trust dated November 30, 2012

Signature:	2012 David Rosenblatt Family Trust dated November 30, 2012
Name/Title:	By: David Peltz Its: Trustee
Date:	08/14/2025

FAQ

How many shares of DIBS does David S. Rosenblatt report owning?

David S. Rosenblatt reports beneficial ownership of 3,904,520 shares, equal to 10.2% of the class.

What holdings do the reported family trusts have in 1stdibs (DIBS)?

The 2012 David Rosenblatt Family Trust holds 665,302 shares (1.8%) and the 2024 Laura Thalheimer Rosenblatt Family Trust (via Bessemer Trust) holds 22,500 shares (0.1%).

Does David S. Rosenblatt claim voting or dispositive power over the trusts' shares?

No. The filing states Mr. Rosenblatt has no voting or dispositive power over shares held by the trusts and disclaims beneficial ownership except for any pecuniary interest.

When was this Schedule 13G/A signed?

Signatures for the reporting persons are dated 08/14/2025.

What class of securities is covered in this filing for DIBS?

The filing covers Common Stock, $0.01 par value per share (CUSIP 320551104).