# EDGAR Filing Document

**Accession Number:** 0002061388
**File Stem:** 0001213900-25-095612
**Filing Date:** 2025-10
**Character Count:** 8204
**Document Hash:** ce781852878923b39ac3aeb31b501133
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-25-095612.hdr.sgml**: 20251002

**ACCESSION NUMBER**: 0001213900-25-095612

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250929

**FILED AS OF DATE**: 20251002

**DATE AS OF CHANGE**: 20251002

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Borg Bjarne Erik Siwert
- **CENTRAL INDEX KEY:** 0002061388

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41581
- **FILM NUMBER:** 251371415

**MAIL ADDRESS:**
- **STREET 1:** 307 OLD JUPITER BEACH ROAD
- **CITY:** JUPITER
- **STATE:** FL
- **ZIP:** 33477
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Safe & Green Development Corp
- **CENTRAL INDEX KEY:** 0001959023
- **STANDARD INDUSTRIAL CLASSIFICATION:** REFUSE SYSTEMS [4953]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 871375590
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 5011 GATE PARKWAY
- **STREET 2:** BUILDING 100
- **CITY:** JACKSONVILLE
- **STATE:** FL
- **ZIP:** 32256
- **BUSINESS PHONE:** (646) 240-4235

**MAIL ADDRESS:**
- **STREET 1:** 5011 GATE PARKWAY
- **STREET 2:** BUILDING 100
- **CITY:** JACKSONVILLE
- **STATE:** FL
- **ZIP:** 32256

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

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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**<sup>*</sup><br>Borg Bjarne Erik Siwert<br><sub>(Last) (First) (Middle)</sub><br>C/O SAFE AND GREEN DEVELOPMENT, CORP.,<br>100 BISCAYNE BLVD., SUITE 1201<br><sub>(Street)</sub><br>MIAMI, FL 33132<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-09-29 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Safe & Green Development Corp [ SGD ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Series A Convertible Preferred Stock | 2025-09-29 |  | D |  | 485766<sup>(1)(2)</sup> | D | <sup>(1)</sup> | 0 | I | By Index Equity US LLC and Index Resource Equity LLC<sup>(3)</sup> |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Series A Convertible Preferred Stock | <sup>(4)</sup> | 2025-09-29 |  | A |  | 485766<sup>(1)(2)</sup> |  | 2025-09-29 | <sup>(1)</sup> | Common Stock | 1060489<sup>(5)</sup> | <sup>(6)</sup> | 485766 | I | By Index Equity US LLC and Index Resource Equity LLC<sup>(3)</sup> |

---

### Footnotes:

(1) At the Issuer's Annual Meeting of Stockholders held on September 29, 2025, the Issuer's stockholders approved the issuance of the Issuer's common stock, par value $0.001 per share (the "Common Stock") upon the conversion of the Issuer's Series A Convertible Preferred Stock pursuant to the terms set forth in the Certificate of Designation of Preferences, Rights and Limitations of Series A Convertible Preferred Stock ("Series A Preferred"). Stockholder approval of the conversion feature of the shares of Series A Preferred held by the Reporting Person is being reported herein as a disposition of a non-derivative security to the Issuer and an acquisition of a derivative security from the Issuer. There is no expiration date related to the conversion of the shares of Series A Preferred into shares of Common Stock.

(2) Total includes 485,616 shares of Series A Preferred held by Index Equity US LLC ("IEU") and 150 shares of Series A Preferred held by Index Resource Equity LLC ("IRE"). The Reporting Person is the manager of IEU and the manager of Index Management Services LLC, which is the manager of IRE.

(3) The Reporting Person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein.

(4) Each share of Series A Preferred is convertible into six shares of the Issuer's Common Stock, subject to compliance with Nasdaq rules.

(5) To maintain the Reporting Person's interest below 19.99% in accordance with Nasdaq rules, as of the date hereof, the shares of Series A Preferred held by the Reporting Person are convertible into 1,060,489 shares of the Issuer's Common Stock (notwithstanding that 485,766 shares of Series A Preferred would otherwise be convertible, at a conversion ratio of six shares of the Issuer's Common Stock for each share of Series A Preferred, into 2,914,596 shares of the Issuer's Common Stock).

(6) The Reporting Person received the shares of Series A Preferred from the Issuer as partial consideration for the Reporting Person's membership interest in Resource Group in connection with the Issuer's acquisition of Resource Group US Holdings LLC ("Resource Group") pursuant to the Membership Interests Purchase Agreement, dated as of February 25, 2025, as amended June 2, 2025.

**Signature:** /s/ Nicolai Brune, Attorney-in-Fact  
**Date:** 2025-10-02

### Remarks:

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).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**