# EDGAR Filing Document

**Accession Number:** 0001788316
**File Stem:** 0001104659-25-108192
**Filing Date:** 2025-11
**Character Count:** 30398
**Document Hash:** 482db7ab35b9011edefaaffb2ec266cc
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-25-108192.hdr.sgml**: 20251107

**ACCESSION NUMBER**: 0001104659-25-108192

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

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20251107

**DATE AS OF CHANGE**: 20251107

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** CollPlant Biotechnologies Ltd
- **CENTRAL INDEX KEY:** 0001631487
- **STANDARD INDUSTRIAL CLASSIFICATION:** ORTHOPEDIC, PROSTHETIC & SURGICAL APPLIANCES & SUPPLIES [3842]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 000000000
- **STATE OF INCORPORATION:** L3
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-90478
- **FILM NUMBER:** 251460815

**BUSINESS ADDRESS:**
- **STREET 1:** 4 OPPENHEIMER ST., 11TH FLOOR
- **CITY:** REHOVOT
- **STATE:** L3
- **ZIP:** 74140
- **BUSINESS PHONE:** 972-73-232-5600

**MAIL ADDRESS:**
- **STREET 1:** 4 OPPENHEIMER ST., 11TH FLOOR
- **CITY:** REHOVOT
- **STATE:** L3
- **ZIP:** 74140

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CollPlant Holdings Ltd.
- **DATE OF NAME CHANGE:** 20190620

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CollPlant Biotechnologies Ltd.
- **DATE OF NAME CHANGE:** 20190619

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CollPlant Holdings Ltd.
- **DATE OF NAME CHANGE:** 20150122
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Loewenbaum Lilian S.
- **CENTRAL INDEX KEY:** 0001788316

**ORGANIZATION NAME:**

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

**MAIL ADDRESS:**
- **STREET 1:** 1000 WESTBANK DRIVE
- **STREET 2:** SUITE #2A
- **CITY:** AUSTIN
- **STATE:** TX
- **ZIP:** 78746

## Exhibit 99.4

**Exhibit 4**

![](tm2530524d1_ex99-4img001.jpg)

George Walter Loewenbaum

Rocky Point Ventures, LLC

1000 Westbank Dr., Suite #2A

Austin, TX 78746

November 6, 2025

Yahiel Tal

CEO, Director

CollPlant Biotechnologies, Ltd.

4 Oppenheimer St.

P.O. Box 4132

Rehovot 7670104, Israel

Dear Yahiel:

Thank you for visiting with Homi and me yesterday. Upon reflection, Homi and I hereby withdraw our request that you nominate Nachum "Homi" Shamir for CollPlant's Board of Directors. As shareholders, Homi and I wish all the best for CollPlant's future.

---

| |
|:---|
| Sincerely, |
| /s/ G Walter Loewenbaum |
| G. Walter Loewenbaum |

---

---

| | |
|:---|:---|
| CC: | Nachum "Homi" Shamir |
|  | *VIA E-MAIL ONLY* |
|  | Reg Hargrove |
|  | Patrick Chalmers |
|  | *VIA E-MAIL ONLY* |

---

Page **1** of **1**

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 2)**

**CollPlant Biotechnologies Ltd**

*(Name of Issuer)*

**Ordinary Shares, par value NIS 1.5 per share**

*(Title of Class of Securities)*

**19516R107**

*(CUSIP Number)*

**Lillian S. Loewenbaum**<br>1000 Westbank Dr, Ste #2A<br>Austin TX 78746<br>512-423-5857

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**11/06/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **19516R107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Loewenbaum Lilian S.** | Name of reporting person<br>**Loewenbaum Lilian S.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**186289.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**186289.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**186289.00** | Aggregate amount beneficially owned by each reporting person<br>**186289.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**1.5%** | Percent of class represented by amount in Row (11)<br>**1.5%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** See Item 11: Consists of (a) 25,000 shares of the Issuer's ordinary shares underlying American Depository Shares ("ADSs") held in the Lillian Shaw Loewenbaum Trust, and (b) 161,289 shares of the Issuer's ordinary shares underlying ADSs held by the Reporting Person directly.

| **CUSIP No.** | **19516R107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**George Walter Loewenbaum** | Name of reporting person<br>**George Walter Loewenbaum** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**1256056.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**1256056.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**1256056.00** | Aggregate amount beneficially owned by each reporting person<br>**1256056.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**9.9%** | Percent of class represented by amount in Row (11)<br>**9.9%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** See Item 11: Consists of (a) 65,000 shares of the Issuer's ordinary shares underlying ADSs held by the Walter Loewenbaum Trust, (b) 220,917 ordinary shares underlying ADSs held by the Reporting Person directly, and (c) 970,139 ordinary shares underlying ADSs held by the Reporting Person in an IRA.

| **CUSIP No.** | **19516R107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Elizabeth S. Loewenbaum** | Name of reporting person<br>**Elizabeth S. Loewenbaum** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**20688.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**20688.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**20688.00** | Aggregate amount beneficially owned by each reporting person<br>**20688.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.2%** | Percent of class represented by amount in Row (11)<br>**0.2%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

| **CUSIP No.** | **19516R107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**The Loewenbaum 1992 Trust** | Name of reporting person<br>**The Loewenbaum 1992 Trust** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**TEXAS** | Citizenship or place of organization<br>**TEXAS** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**170000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**170000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**170000.00** | Aggregate amount beneficially owned by each reporting person<br>**170000.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**1.3%** | Percent of class represented by amount in Row (11)<br>**1.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **19516R107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**The Waterproof Partnership, Ltd.** | Name of reporting person<br>**The Waterproof Partnership, Ltd.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**TEXAS** | Citizenship or place of organization<br>**TEXAS** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**35000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**35000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**35000.00** | Aggregate amount beneficially owned by each reporting person<br>**35000.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.3%** | Percent of class represented by amount in Row (11)<br>**0.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **19516R107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**The Loewenbaum Residence Trust FBO Anna Loewenbaum** | Name of reporting person<br>**The Loewenbaum Residence Trust FBO Anna Loewenbaum** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**TEXAS** | Citizenship or place of organization<br>**TEXAS** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**15000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**15000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**15000.00** | Aggregate amount beneficially owned by each reporting person<br>**15000.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.1%** | Percent of class represented by amount in Row (11)<br>**0.1%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **19516R107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**The Elizabeth Scott Loewenbaum 1992 Trust** | Name of reporting person<br>**The Elizabeth Scott Loewenbaum 1992 Trust** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**TEXAS** | Citizenship or place of organization<br>**TEXAS** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**15000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**15000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**15000.00** | Aggregate amount beneficially owned by each reporting person<br>**15000.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.1%** | Percent of class represented by amount in Row (11)<br>**0.1%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **19516R107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Patrick Chalmers** | Name of reporting person<br>**Patrick Chalmers** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**5100.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**5100.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**5100.00** | Aggregate amount beneficially owned by each reporting person<br>**5100.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.1%** | Percent of class represented by amount in Row (11)<br>**0.1%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

| **CUSIP No.** | **19516R107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Reginald J. Hargrove** | Name of reporting person<br>**Reginald J. Hargrove** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**28100.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**244688.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**28100.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**244688.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**272788.00** | Aggregate amount beneficially owned by each reporting person<br>**272788.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**2.2%** | Percent of class represented by amount in Row (11)<br>**2.2%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** See Item 11: Consists of (a) 20,688 shares of the Issuer's ADSs held by spouse, and (b) 224,000 held by trusts over which the reporting person is a trustee with shared voting and dispositive power.

| **CUSIP No.** | **19516R107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Nachum Shamir** | Name of reporting person<br>**Nachum Shamir** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**29298.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**29298.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**29298.00** | Aggregate amount beneficially owned by each reporting person<br>**29298.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.2%** | Percent of class represented by amount in Row (11)<br>**0.2%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** Dual citizen of United States and Israel

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Ordinary Shares, par value NIS 1.5 per share

**(b) Name of Issuer:**
CollPlant Biotechnologies Ltd

**(c) Address of Issuer's Principal Executive Offices:**
4 Oppenheimer St, Weizmann Science Park, Rehovot, L3, 7670104

**Item 4. Purpose of Transaction**

On October 20, 2025, the Reporting Persons delivered a letter to the Board of Directors of the Issuer (the "Board") requesting the appointment of Nachum Shamir as Chairman in the immediate future and requesting consideration of adding other qualified individuals to the board. A copy of the letter is filed as Exhibit 3.

On November 6, 2025, the Reporting Persons delivered a letter to the Board withdrawing their request for the appointment of Nachum Shamir as a director. A copy of the letter is filed as Exhibit 4.

The acquisitions of Ordinary Shares by the Reporting Persons for investment purposes.

The Reporting Persons intend to review their investment in the Issuer on a continuing basis and, depending upon the price of and other market conditions relating to the Ordinary Shares or other securities of the Issuer, subsequent developments affecting the Issuer, the Issuer's business and prospects, other investment and business opportunities available to the Reporting Persons, general stock market and economic conditions, tax considerations, and other factors deemed relevant, may form a plan or proposal to take any of the actions specified in clauses (a) through (j) of Item 4 of Schedule 13D, in which case the Reporting Persons will file an amendment to this Schedule 13D. No Reporting Person has any present plan or proposal which would relate to or result in any of the matters set forth in subparagraphs (a) - (j) of Item 4 of Schedule 13D except as set forth herein or such as would occur upon or in connection with completion of, or following, any of the actions discussed herein.

**Item 5. Interest in Securities of the Issuer**

**(a)**
The information concerning the ownership of Ordinary Shares of the Reporting Persons set forth on the cover pages hereto is expressly incorporated by reference herein. To the best knowledge of the Reporting Persons, as of June 30, 2025, there were 12,716,014 Ordinary Shares outstanding (which number was set forth in the Issuer's Form 6-K filed by the Issuer with the SEC on August 20, 2025). The calculations of percentages in this Schedule 13D are based on the number of shares of Ordinary Shares outstanding on June 30, 2025 plus the shares that may be issued to the Reporting Persons within 60 days upon the exercise of options and warrants.

Collectively, the Reporting Persons beneficially own in the aggregate 2,005,719 Ordinary Shares, representing 15.8% of the total outstanding Ordinary Shares (including the shares that may be issued to the Reporting Persons within 60 days upon the exercise of options and warrants).

**(b)**
The information concerning the ownership of Ordinary Shares of the Reporting Persons set forth on the cover pages hereto is expressly incorporated by reference herein.

**(c)**
Since the filing of the initial Schedule 13D on September 30, 2025, the Reporting Persons have not effected any transactions involving the Ordinary Shares.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

The Reporting Persons have entered into a Joint Filing Agreement, dated October 20, 2025, a copy of which is attached hereto as Exhibit 2 to this Schedule 13D and is incorporated herein by reference.

### 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.

**Reporting Person:** Loewenbaum Lilian S.

**Signature:** /s/ Lillian S. Loewenbaum

**Name/Title:** Lillian S. Loewenbaum

**Date:** 11/07/2025

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.

**Reporting Person:** George Walter Loewenbaum

**Signature:** /s/ George Walter Loewenbaum

**Name/Title:** George Walter Loewenbaum

**Date:** 11/07/2025

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.

**Reporting Person:** Elizabeth S. Loewenbaum

**Signature:** /s/ Elizabeth Loewenbaum

**Name/Title:** Elizabeth Loewenbaum

**Date:** 11/07/2025

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.

**Reporting Person:** The Loewenbaum 1992 Trust

**Signature:** /s/ George Walter Loewenbaum

**Name/Title:** George Walter Loewenbaum/Trustee

**Date:** 11/07/2025

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.

**Reporting Person:** The Waterproof Partnership, Ltd.

**Signature:** /s/ George Walter Loewenbaum

**Name/Title:** George Walter Loewenbaum/General Partner

**Date:** 11/07/2025

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.

**Reporting Person:** The Loewenbaum Residence Trust FBO Anna Loewenbaum

**Signature:** /s/ George Walter Loewenbaum

**Name/Title:** George Walter Loewenbaum/Trustee

**Date:** 11/07/2025

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.

**Reporting Person:** The Elizabeth Scott Loewenbaum 1992 Trust

**Signature:** /s/ George Walter Loewenbaum

**Name/Title:** George Walter Loewenbaum/Trustee

**Date:** 11/07/2025

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.

**Reporting Person:** Patrick Chalmers

**Signature:** /s/ Patrick Chalmers

**Name/Title:** Patrick Chalmers

**Date:** 11/07/2025

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.

**Reporting Person:** Reginald J. Hargrove

**Signature:** /s/ Reginald J. Hargrove

**Name/Title:** Reginald J. Hargrove

**Date:** 11/07/2025

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.

**Reporting Person:** Nachum Shamir

**Signature:** /s/ Nachum Shamir

**Name/Title:** Nachum Shamir

**Date:** 11/07/2025