# EDGAR Filing Document

**Accession Number:** 0001190273
**File Stem:** 0001140361-25-023175
**Filing Date:** 2025-6
**Character Count:** 25088
**Document Hash:** a1dd170b386e15fef35fc472f33f34f8
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-25-023175.hdr.sgml**: 20250620

**ACCESSION NUMBER**: 0001140361-25-023175

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

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20250620

**DATE AS OF CHANGE**: 20250620

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Kronos Bio, Inc.
- **CENTRAL INDEX KEY:** 0001741830
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-92176
- **FILM NUMBER:** 251061532

**BUSINESS ADDRESS:**
- **STREET 1:** 1300 S. EL CAMINO REAL
- **STREET 2:** SUITE 400
- **CITY:** SAN MATEO
- **STATE:** CA
- **ZIP:** 94402
- **BUSINESS PHONE:** (650) 781-5200

**MAIL ADDRESS:**
- **STREET 1:** 1300 S. EL CAMINO REAL
- **STREET 2:** SUITE 400
- **CITY:** SAN MATEO
- **STATE:** CA
- **ZIP:** 94402
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BISCHOFBERGER NORBERT W
- **CENTRAL INDEX KEY:** 0001190273

**ORGANIZATION NAME:**

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

**MAIL ADDRESS:**
- **STREET 1:** 333 LAKESIDE DR
- **STREET 2:** C/O GILEAD SCIENCES, INC.
- **CITY:** FOSTER CITY
- **STATE:** CA
- **ZIP:** 94404

## Ex-99.A

------

#### Exhibit A

#### JOINT FILING STATEMENT
I, the undersigned, hereby express my agreement that the attached Schedule 13D (and any amendments thereto) relating to the Common Stock of Kronos Bio, Inc. is filed on behalf of each of the undersigned.

---

| | |
|:---|:---|
| Dated: June 20, 2025 |  |
|  | /s/ Norbert Bischofberger, Ph.D. |
|  | **Norbert Bischofberger, Ph.D.** |

---

---

| | |
|:---|:---|
| **Norbert W. & Inger A. Bischofberger Revocable Inter Vivos Trust, dtd August 29, 1994** | **Norbert W. & Inger A. Bischofberger Revocable Inter Vivos Trust, dtd August 29, 1994** |
| By: | /s/ Norbert Bischofberger, Ph.D. |
| Name: | Norbert Bischofberger, Ph.D., Trustee |

---

---

| | |
|:---|:---|
| **Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the David Michael Anthony Dynasty GST Exempt Trust dated April 29, 2020** | **Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the David Michael Anthony Dynasty GST Exempt Trust dated April 29, 2020** |
| By: | /s/ Norbert Bischofberger, Ph.D. |
| Name: | Norbert Bischofberger, Ph.D., Trustee |

---

---

| | |
|:---|:---|
| **Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the David Michael Anthony Dynasty GST Non-Exempt Trust dated April 29, 2020** | **Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the David Michael Anthony Dynasty GST Non-Exempt Trust dated April 29, 2020** |
| By: | /s/ Norbert Bischofberger, Ph.D. |
| Name: | Norbert Bischofberger, Ph.D., Trustee |

---

---

| | |
|:---|:---|
| **Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the Irene Alisha Bischofberger Dynasty GST Exempt Trust dated April 29, 2020** | **Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the Irene Alisha Bischofberger Dynasty GST Exempt Trust dated April 29, 2020** |
| By: | /s/ Norbert Bischofberger, Ph.D. |
| Name: | Norbert Bischofberger, Ph.D., Trustee |

---

---

| | |
|:---|:---|
| **Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the Irene Alisha Bischofberger Dynasty GST Non-Exempt Trust dated April 29, 2020** | **Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the Irene Alisha Bischofberger Dynasty GST Non-Exempt Trust dated April 29, 2020** |
| By: | /s/ Norbert Bischofberger, Ph.D. |
| Name: | Norbert Bischofberger, Ph.D., Trustee |

---

------

## Exhibit 99.1

------

**Exhibit 99.1**<br>

**Item 5.** **Interest in Securities of the Issuer**<br>

*Item 5 of the Original Schedule 13D is hereby amended and restated in its entirety as follows:*

(a) (b) The following information with respect to the ownership of Common Stock of the Issuer by the persons filing this statement on Schedule 13D is provided as of June 20, 2025:

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| **Reporting Person** | **Shares Held**<br> **Directly** | **Sole**<br> **Voting**<br> **Power** | **Shared**<br> **Voting**<br> **Power** | **Sole**<br> **Dispositive**<br> **Power** | **Shared**<br> **Dispositive**<br> **Power** | **Beneficial**<br> **Ownership** | **Percentage**<br> **of Class(2)** |
| Norbert Bischofberger, Ph.D. (1) | 0 | 0 | 0 | 0 | 0 | 0 | 0% |
| Norbert W. & Inger A. Bischofberger Revocable Inter Vivos Trust, dtd August 29, 1994 | 0 | 0 | 0 | 0 | 0 | 0 | 0% |
| Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the David Michael Anthony Dynasty GST Exempt Trust dated April 29, 2020 | 0 | 0 | 0 | 0 | 0 | 0 | 0% |
| Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the David Michael Anthony Dynasty GST Non-Exempt Trust dated April 29, 2020 | 0 | 0 | 0 | 0 | 0 | 0 | 0% |
| Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the Irene Alisha Bischofberger Dynasty GST Exempt Trust dated April 29, 2020 | 0 | 0 | 0 | 0 | 0 | 0 | 0% |
| Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the Irene Alisha Bischofberger Dynasty GST Non-Exempt Trust dated April 29, 2020 | 0 | 0 | 0 | 0 | 0 | 0 | 0% |

---

------

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 3)**

**Kronos Bio, Inc.**

*(Name of Issuer)*

**Common Stock**

*(Title of Class of Securities)*

**50107A104**

*(CUSIP Number)*

**Norbert Bischofberger, Ph.D.**<br>301 Binney Street, 2nd Floor East<br>Cambridge MA 02142<br>(650) 781-5200

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

**06/20/2025**

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

| **CUSIP No.** | **50107A104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**BISCHOFBERGER NORBERT W** | Name of reporting person<br>**BISCHOFBERGER NORBERT W** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (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>**0.00** |
| 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>**0.00** |
| 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>**0.00** | Aggregate amount beneficially owned by each reporting person<br>**0.00** | |
| 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%** | Percent of class represented by amount in Row (11)<br>**0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

| **CUSIP No.** | **50107A104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Norbert W. & Inger A. Bischofberger Revocable Inter Vivos Trust, dtd August 29, 1994** | Name of reporting person<br>**Norbert W. & Inger A. Bischofberger Revocable Inter Vivos Trust, dtd August 29, 1994** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (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>**CALIFORNIA** | Citizenship or place of organization<br>**CALIFORNIA** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| 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>**0.00** |
| 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>**0.00** | Aggregate amount beneficially owned by each reporting person<br>**0.00** | |
| 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%** | Percent of class represented by amount in Row (11)<br>**0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **50107A104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the David Michael Anthony Dynasty GST Exempt Trust dated April 29, 2020** | Name of reporting person<br>**Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the David Michael Anthony Dynasty GST Exempt Trust dated April 29, 2020** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (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>**CALIFORNIA** | Citizenship or place of organization<br>**CALIFORNIA** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| 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>**0.00** |
| 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>**0.00** | Aggregate amount beneficially owned by each reporting person<br>**0.00** | |
| 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%** | Percent of class represented by amount in Row (11)<br>**0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **50107A104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the David Michael Anthony Dynasty GST Non-Exempt Trust dated April 29, 2020** | Name of reporting person<br>**Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the David Michael Anthony Dynasty GST Non-Exempt Trust dated April 29, 2020** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (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>**CALIFORNIA** | Citizenship or place of organization<br>**CALIFORNIA** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| 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>**0.00** |
| 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>**0.00** | Aggregate amount beneficially owned by each reporting person<br>**0.00** | |
| 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%** | Percent of class represented by amount in Row (11)<br>**0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **50107A104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the Irene Alisha Bischofberger Dynasty GST Exempt Trust dated April 29, 2020** | Name of reporting person<br>**Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the Irene Alisha Bischofberger Dynasty GST Exempt Trust dated April 29, 2020** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (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>**CALIFORNIA** | Citizenship or place of organization<br>**CALIFORNIA** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| 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>**0.00** |
| 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>**0.00** | Aggregate amount beneficially owned by each reporting person<br>**0.00** | |
| 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%** | Percent of class represented by amount in Row (11)<br>**0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **50107A104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the Irene Alisha Bischofberger Dynasty GST Non-Exempt Trust dated April 29, 2020** | Name of reporting person<br>**Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the Irene Alisha Bischofberger Dynasty GST Non-Exempt Trust dated April 29, 2020** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (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>**CALIFORNIA** | Citizenship or place of organization<br>**CALIFORNIA** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| 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>**0.00** |
| 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>**0.00** | Aggregate amount beneficially owned by each reporting person<br>**0.00** | |
| 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%** | Percent of class represented by amount in Row (11)<br>**0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** Explanatory Note:  This Amendment No. 3, which amends the Schedule 13D filed with the Securities and Exchange Commission (the "SEC") on November 27, 2023 and, as amended by Amendment No. 1 filed June 12, 2024 and Amendment No. 2 filed July 2, 2024 (as amended, the "Original Schedule 13D") filed on behalf of Norbert Bischofberger, Ph.D., Norbert W. & Inger A. Bischofberger Revocable Inter Vivos Trust, dtd August 29, 1994, Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the David Michael Anthony Dynasty GST Exempt Trust dated April 29, 2020, Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the David Michael Anthony Dynasty GST Non-Exempt Trust dated April 29, 2020, Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the Irene Alisha Bischofberger Dynasty GST Exempt Trust dated April 29, 2020, Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the Irene Alisha Bischofberger Dynasty GST Non-Exempt Trust dated April 29, 2020, (collectively, the "Reporting Persons") is being filed to report the sale of all of the common stock, $0.001 par value per share (the "Common Stock"), of Kronos Bio, Inc., a Delaware corporation (the "Issuer") by the Reporting Persons, as more specifically described below, resulting in the Reporting Persons ceasing to be the beneficial owners of at least five percent of the Common Stock. Capitalized terms used but not defined herein have the meanings given to such terms in the Original Schedule 13D.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock

**(b) Name of Issuer:**
Kronos Bio, Inc.

**(c) Address of Issuer's Principal Executive Offices:**
301 Binney Street, 2nd Floor East, Cambridge, MA, 02142

**Item 4. Purpose of Transaction**

Item 4 of the Original Schedule 13D is hereby amended and supplemented by adding the following paragraph at the end of Item 4:

On June 20, 2025 (the "Effective Time") the Issuer completed the transactions contemplated by the Agreement and Plan of Merger, dated as of May 1, 2025 (the "Merger Agreement") by and among the Issuer, Concentra Biosciences, LLC ("Concentra") and Concentra Merger Sub IV, Inc., a wholly owned subsidiary of Concentra (the "Merger").  Pursuant to the Merger, the Issuer became a wholly-owned subsidiary of Concentra.  In addition, pursuant to the Merger Agreement, at the Effective Time, Norbert Bischofberger, Ph.D. ceased to be a director of the Issuer.

At the Effective Time of the Merger each issued and outstanding share of the Issuer's Common Stock was automatically converted into the right to receive (i) $0.57 in cash, without interest (the "Per Share Cash Consideration") and (ii) one contractual contingent value right pursuant to the CVR Agreement in the form attached as Exhibit A to the Merger Agreement (a "CVR" and together with the Per Share Cash Consideration, the "Merger Consideration").  Each CVR represents the right to receive certain contingent cash payments.

In addition, pursuant to the Merger Agreement, immediately prior to the Effective Time, each outstanding stock option to purchase shares of the Issuer's Common Stock (each, a "stock option") became immediately vested and exercisable in full.  At the Effective Time, each outstanding stock option was cancelled and converted into the right to receive the equivalent Merger Consideration.  Accordingly, as of June 20, 2025, the Reporting Persons ceased to have beneficial ownership of any shares of Common Stock.

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

**(a)**
See Exhibit 99.1

**(b)**
See Exhibit 99.1

**(c)**
None of the Reporting Persons effected any transactions in shares of the Issuer's Common Stock during the 60 days preceding the closing of the Merger or subsequent to the closing of the Merger.

### 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:** BISCHOFBERGER NORBERT W

**Signature:** /s/ Norbert Bischofberger, Ph.D.

**Name/Title:** Norbert Bischofberger, Ph.D.

**Date:** 06/20/2025

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:** Norbert W. & Inger A. Bischofberger Revocable Inter Vivos Trust, dtd August 29, 1994

**Signature:** /s/ Norbert Bischofberger, Ph.D.

**Name/Title:** Norbert Bischofberger, Ph.D., Trustee

**Date:** 06/20/2025

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:** Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the David Michael Anthony Dynasty GST Exempt Trust dated April 29, 2020

**Signature:** /s/ Norbert Bischofberger, Ph.D.

**Name/Title:** Norbert Bischofberger, Ph.D., Trustee

**Date:** 06/20/2025

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:** Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the David Michael Anthony Dynasty GST Non-Exempt Trust dated April 29, 2020

**Signature:** /s/ Norbert Bischofberger, Ph.D.

**Name/Title:** Norbert Bischofberger, Ph.D., Trustee

**Date:** 06/20/2025

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:** Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the Irene Alisha Bischofberger Dynasty GST Exempt Trust dated April 29, 2020

**Signature:** /s/ Norbert Bischofberger, Ph.D.

**Name/Title:** Norbert Bischofberger, Ph.D., Trustee

**Date:** 06/20/2025

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:** Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the Irene Alisha Bischofberger Dynasty GST Non-Exempt Trust dated April 29, 2020

**Signature:** /s/ Norbert Bischofberger, Ph.D.

**Name/Title:** Norbert Bischofberger, Ph.D., Trustee

**Date:** 06/20/2025