1stdibs.com, Inc. reports amended Schedule 13G/A disclosing beneficial ownership by David S. Rosenblatt and related trusts. The filing states Mr. Rosenblatt has sole voting and dispositive power over 3,623,864 shares, representing 9.8% of common stock based on 35,445,599 shares outstanding as of March 31, 2026. The filing also lists the 2012 David Rosenblatt Family Trust holding 665,302 shares (1.9%) and the 2024 Laura Thalheimer Rosenblatt Family Trust holding 22,500 shares (0.1%). The registrant disclaims beneficial ownership of trust-held shares except for pecuniary interest and states limited voting/dispositive control over trust assets.
Positive
None.
Negative
None.
Insights
Amendment clarifies ownership stakes and disclaimers for Mr. Rosenblatt and two family trusts.
The filing shows 3,623,864 shares under Mr. Rosenblatt's sole voting and dispositive power, equal to 9.8% of the class using the issuer's stated outstanding share count of 35,445,599 as of March 31, 2026. Two trusts are listed separately with 665,302 and 22,500 shares respectively.
Language in Item 4 repeatedly states Mr. Rosenblatt "disclaims beneficial ownership" of trust-held shares except for pecuniary interest. Future filings will determine whether holdings or control statements change; cash‑flow treatment and voting arrangements beyond the disclosed powers are not detailed in the excerpt.
Key Figures
Shares outstanding used:35,445,599 sharesRosenblatt sole voting/dispositive power:3,623,864 sharesRosenblatt ownership percent:9.8%+4 more
7 metrics
Shares outstanding used35,445,599 sharesas of <date>March 31, 2026</date>
Rosenblatt sole voting/dispositive power3,623,864 sharesreported on Schedule 13G/A cover pages
Rosenblatt ownership percent9.8%calculation using outstanding shares as of <date>March 31, 2026</date>
2012 David Rosenblatt Family Trust holdings665,302 shareslisted on cover page
2012 Trust percent1.9%calculated using outstanding shares as of <date>March 31, 2026</date>
2024 Laura Thalheimer Rosenblatt Family Trust holdings22,500 shareslisted on cover page
2024 Trust percent0.1%calculated using outstanding shares as of <date>March 31, 2026</date>
Key Terms
disclaims beneficial ownership, sole voting power, sole dispositive power
3 terms
disclaims beneficial ownershipregulatory
"Mr Rosenblatt disclaims beneficial ownership of the shares of Common Stock held by the Trusts"
sole voting powerregulatory
"Sole Voting Power 3,623,864.00"
Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.
sole dispositive powerregulatory
"Sole Dispositive Power 3,623,864.00"
Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 6)
1stdibs.com, Inc.
(Name of Issuer)
Common Stock, $0.01 par value per share
(Title of Class of Securities)
320551104
(CUSIP Number)
03/31/2026
(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
3,623,864.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
3,623,864.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
3,623,864.00
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)
9.8 %
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
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)
1.9 %
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. 6 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 35,445,599 shares of Common Stock of the Issuer outstanding as of September March 31, 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:
05/14/2026
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:
05/15/2026
2012 David Rosenblatt Family Trust dated November 30, 2012
Signature:
2012 David Rosenblatt Family Trust dated November 30, 2012
What stake does David S. Rosenblatt report in 1stdibs (DIBS)?
Mr. Rosenblatt reports sole voting and dispositive power over 3,623,864 shares, representing 9.8% of common stock using 35,445,599 shares outstanding as of March 31, 2026 from the issuer's Form 10-Q.
How many shares do the listed trusts hold for DIBS?
The filing shows the 2012 David Rosenblatt Family Trust holds 665,302 shares (1.9%) and the 2024 Laura Thalheimer Rosenblatt Family Trust holds 22,500 shares (0.1%), as reflected on the cover pages incorporated into Item 4.
Does Mr. Rosenblatt claim beneficial ownership of the trust-held shares?
The filing states Mr. Rosenblatt "disclaims beneficial ownership" of the shares held by the Trusts except to the extent of his pecuniary interest, and the Amendment specifies this disclaimer multiple times in Item 4.
What share count does the filing use to calculate percentages for DIBS?
Percentages are calculated using 35,445,599 shares outstanding as of March 31, 2026, a figure the filing cites from the issuer's Form 10-Q and uses to derive the reported 9.8%, 1.9%, and 0.1% ownership stakes.
