# EDGAR Filing Document

**Accession Number:** 0001600641
**File Stem:** 0001237860-25-000005
**Filing Date:** 2025-11
**Character Count:** 15569
**Document Hash:** 1e1ee7d19bae7394222eadedc1afc0ae
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001237860-25-000005.hdr.sgml**: 20251114

**ACCESSION NUMBER**: 0001237860-25-000005

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13G/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251114

**DATE AS OF CHANGE**: 20251114

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** 1stdibs.com, Inc.
- **CENTRAL INDEX KEY:** 0001600641
- **STANDARD INDUSTRIAL CLASSIFICATION:** RETAIL-CATALOG & MAIL-ORDER HOUSES [5961]
- **ORGANIZATION NAME:** 07 Trade & Services
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-93407
- **FILM NUMBER:** 251488514

**BUSINESS ADDRESS:**
- **STREET 1:** 300 PARK AVENUE SOUTH
- **STREET 2:** 10TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10010
- **BUSINESS PHONE:** 212-627-3929

**MAIL ADDRESS:**
- **STREET 1:** 300 PARK AVENUE SOUTH
- **STREET 2:** 10TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10010
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ROSENBLATT DAVID S
- **CENTRAL INDEX KEY:** 0001237860

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G/A

**MAIL ADDRESS:**
- **STREET 1:** C/O IAC INC.
- **STREET 2:** 555 WEST 18TH STREET
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10011

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

## SCHEDULE 13G

### Under the Securities Exchange Act of 1934

**(Amendment No. 4)**

**Issuer:** 1stdibs.com, Inc.

**Title of Class of Securities:** Common Stock, $0.01 par value per share

**CUSIP Number:** 320551104

**Date of Event Which Requires Filing of this Statement:** 09/30/2025

**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)

---

| 1. | Names of Reporting Persons<br>David S. Rosenblatt | Names of Reporting Persons<br>David S. Rosenblatt |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>X1 | Citizenship or Place of Organization<br>X1 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>4017563.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>4017563.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>0.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>4017563.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>4017563.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [x] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [x] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>10.4% | Percent of Class Represented by Amount in Row (9)<br>10.4% |
| 12. | Type of Reporting Person (See Instructions)<br>IN | Type of Reporting Person (See Instructions)<br>IN |

---

| 1. | Names of Reporting Persons<br>Bessemer Trust Company of Delaware, N.A., as Trustee of the 2024 Laura Thalheimer Rosenblatt Family Trust  u/a/d April 1, 2024 | Names of Reporting Persons<br>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)<br>(a) [ ] (b) [x] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>22500.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>22500.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>0.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>22500.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>22500.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>0.1% | Percent of Class Represented by Amount in Row (9)<br>0.1% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

---

| 1. | Names of Reporting Persons<br>2012 David Rosenblatt Family Trust dated November 30, 2012 | Names of Reporting Persons<br>2012 David Rosenblatt Family Trust dated November 30, 2012 |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>NY | Citizenship or Place of Organization<br>NY |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>665302.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>665302.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>0.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>665302.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>665302.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>1.8% | Percent of Class Represented by Amount in Row (9)<br>1.8% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

---

**Item 1(a). Name of Issuer:**
1stdibs.com, Inc.

**Item 1(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

**Item 2(b). Address of Principal Business Office:**
c/o 1stdibs.com, Inc.
300 Park Avenue South
10th Floor
New York, New York 10010

**Item 2(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.

**Item 2(d). Title of Class of Securities:**
Common Stock, $0.01 par value per share

**Item 2(e). CUSIP Number:**
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. 4 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 36,246,609 shares of Common Stock of the Issuer outstanding as of September 30, 2025, 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 Five Percent or Less of a Class.**

[x] If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following.

**Item 6. Ownership of More than 5 Percent on Behalf of Another Person.**

Not applicable.

**Item 7. Identification and Classification of the Subsidiary**

Not applicable.

**Item 8. Identification and Classification of Members of the Group**

Not applicable.

**Item 9. Notice of Dissolution of Group**

—

**Item 10. Certification:**

—

### 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**

**Date:** 11/14/2025

**By:** David S. Rosenblatt

**Name & Title:** David S. Rosenblatt

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

**Date:** 11/14/2025

**By:** 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: Kira Lynch Its: Vice President and Trust Officer

**2012 David Rosenblatt Family Trust dated November 30, 2012**

**Date:** 11/14/2025

**By:** 2012 David Rosenblatt Family Trust dated November 30, 2012

**Name & Title:** By: David Peltz Its: Trustee