1stdibs.com (DIBS) filing shows Rosenblatt group holding over 10% stake

Rhea-AI Filing Summary

1stdibs.com, Inc. received Amendment No. 7 to a Schedule 13G reporting common stock ownership by David S. Rosenblatt and two related family trusts. Based on 33,615,293 shares outstanding as of June 30, 2026, Rosenblatt reports 3,701,802 shares of common stock, representing 10.5% of the class, with sole voting and dispositive power over these shares.

The 2012 David Rosenblatt Family Trust holds 712,802 shares (about 2.1%), and the 2024 Laura Thalheimer Rosenblatt Family Trust holds 22,500 shares (about 0.1%), each with sole voting and dispositive power. Rosenblatt states he has no voting or dispositive power over the trust shares and disclaims beneficial ownership of them except to the extent of any pecuniary interest.

Key Figures

Shares outstanding: 33,615,293 shares Rosenblatt shares: 3,701,802 shares Rosenblatt ownership percentage: 10.5% +4 more

7 metrics

Shares outstanding 33,615,293 shares Common stock outstanding as of June 30, 2026, per issuer Form 10-Q

Rosenblatt shares 3,701,802 shares Shares of common stock with sole voting and dispositive power, representing 10.5% of class

Rosenblatt ownership percentage 10.5% Percentage of 1stdibs.com common stock class beneficially owned by David S. Rosenblatt

2012 Family Trust shares 712,802 shares Common stock held by 2012 David Rosenblatt Family Trust, about 2.1% of class

2012 Family Trust percentage 2.1% Percentage of common stock class held by 2012 David Rosenblatt Family Trust

2024 Family Trust shares 22,500 shares Common stock held by 2024 Laura Thalheimer Rosenblatt Family Trust, about 0.1% of class

2024 Family Trust percentage 0.1% Percentage of common stock class held by 2024 Laura Thalheimer Rosenblatt Family Trust

Key Terms

beneficial ownership, dispositive power, pecuniary interest, Schedule 13G, +1 more

5 terms

beneficial ownership financial

"Mr Rosenblatt disclaims beneficial ownership of the shares of Common Stock held by the Trusts"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

dispositive power financial

"Sole Dispositive Power 3,701,802.00"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

pecuniary interest financial

"except to the extent of his pecuniary interest therein"

Schedule 13G regulatory

"The filing of this Amendment No. 7 to (this "Amendment") shall not be deemed"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

Section 13(g) of the Securities Exchange Act of 1934 regulatory

"for purposes of Section 13(g) of the Securities Exchange Act of 1934, as amended"

FAQ

What percentage of 1stdibs.com, Inc. (DIBS) shares does David S. Rosenblatt report owning?

David S. Rosenblatt reports 10.5% beneficial ownership of 1stdibs.com common stock, equal to 3,701,802 shares. This ownership is calculated based on 33,615,293 shares outstanding as of June 30, 2026, with sole voting and dispositive power over his reported shares.

How many 1stdibs.com (DIBS) shares are held by the 2012 David Rosenblatt Family Trust?

The 2012 David Rosenblatt Family Trust holds 712,802 shares of 1stdibs.com common stock, representing about 2.1% of the class. The trust has sole voting and sole dispositive power over these shares according to the Schedule 13G/A Amendment No. 7.

What is the ownership position of the 2024 Laura Thalheimer Rosenblatt Family Trust in DIBS?

The 2024 Laura Thalheimer Rosenblatt Family Trust holds 22,500 shares of 1stdibs.com common stock, about 0.1% of the class. Bessemer Trust Company of Delaware, N.A. serves as trustee with sole voting and dispositive power over these shares.

On what share count is the ownership percentage in this DIBS Schedule 13G/A based?

The reported ownership percentages are based on 33,615,293 shares of 1stdibs.com common stock outstanding as of June 30, 2026. This share count comes from the issuer’s Form 10-Q referenced in the Schedule 13G/A Amendment No. 7 filing.

Does David S. Rosenblatt claim beneficial ownership of the DIBS shares held by the family trusts?

David S. Rosenblatt states he has no voting or dispositive power over shares held by the two family trusts and disclaims beneficial ownership of those shares, except to the extent of his pecuniary interest. The filing clarifies this is not an admission of beneficial ownership under Section 13(g).

What type of securities are covered in this DIBS Schedule 13G/A amendment?

The Schedule 13G/A amendment covers common stock of 1stdibs.com, Inc., with a par value of $0.01 per share and CUSIP number 320551104. The filing updates beneficial ownership information for Rosenblatt and related family trusts.

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Available on EDGAR 08/14/2026 - 09:36 AM Accepted by SEC EDGAR 08/14/2026 - 09:35 AM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 7)

1stdibs.com, Inc.

(Name of Issuer)

Common Stock, $0.01 par value per share

(Title of Class of Securities)

320551104

(CUSIP Number)

06/30/2026

(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)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 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 3,701,802.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 3,701,802.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,701,802.00

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)

10.5 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

CUSIP Number(s): 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 Number(s): 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 712,802.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 712,802.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

712,802.00

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)

2.1 %

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, New York, 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. 7 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: Calculations are based upon 33,615,293 shares of Common Stock of the Issuer outstanding as of September June 30, 2026, as set forth in the Form 10-Q of the Issuer filed with the U.S. Securities and Exchange Commission. 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.
	Not Applicable
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:	08/14/2026

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 and Trust Officer
Date:	08/14/2026

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:	08/14/2026