# EDGAR Filing Document

**Accession Number:** 0001946240
**File Stem:** 0001185185-23-000265
**Filing Date:** 2023-3
**Character Count:** 8784
**Document Hash:** 38fcb384a49327355b0a0e4f3a7157be
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001185185-23-000265.hdr.sgml**: 20230328

**ACCESSION NUMBER**: 0001185185-23-000265

**CONFORMED SUBMISSION TYPE**: SC 13D

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230328

**DATE AS OF CHANGE**: 20230328

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Aceragen, Inc.
- **CENTRAL INDEX KEY:** 0000861838
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **IRS NUMBER:** 043072298
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SC 13D
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-50211
- **FILM NUMBER:** 23767184

**BUSINESS ADDRESS:**
- **STREET 1:** 505 EAGLEVIEW BOULEVARD
- **STREET 2:** SUITE 212
- **CITY:** EXTON
- **STATE:** PA
- **ZIP:** 19341
- **BUSINESS PHONE:** 4843481600

**MAIL ADDRESS:**
- **STREET 1:** 505 EAGLEVIEW BOULEVARD
- **STREET 2:** SUITE 212
- **CITY:** EXTON
- **STATE:** PA
- **ZIP:** 19341

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** IDERA PHARMACEUTICALS, INC.
- **DATE OF NAME CHANGE:** 20050912

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** HYBRIDON INC
- **DATE OF NAME CHANGE:** 19951211
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Chopra Atul
- **CENTRAL INDEX KEY:** 0001946240

**FILING VALUES:**
- **FORM TYPE:** SC 13D

**MAIL ADDRESS:**
- **STREET 1:** C/O ACERAGEN, INC.
- **STREET 2:** 15 TW ALEXANDER DRIVE
- **CITY:** DURHAM
- **STATE:** NC
- **ZIP:** 27709

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**UNITED STATES**<br> **SECURITIES AND EXCHANGE COMMISSION**

**Washington D.C. 20549**

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**SCHEDULE 13D**

**Under the Securities Exchange Act of 1934**

**(Amendment No.)**

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| |
|:---|
| **Aceragen, Inc.** |
| (Name of Issuer) |
| Common Stock, par value $0.001 per share |
| (Title of Class of Securities) |
| 00445F109 |
| (CUSIP Number) |
| Christopher J. Hubbert<br> 1375 East Ninth Street, 29th Floor<br> Cleveland, Ohio 44114<br> 216-696-8700 |
| (Name, Address and Telephone Number of Person Authorized<br> to Receive Notices and Communications) |
| September 28, 2022 |
| (Date of Event which Requires Filing of this Statement) |

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If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. ☐

**Note:** Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See § 240.13d-7 for other parties to whom copies are to be sent.

\*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

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SCHEDULE 13D

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| | |
|:---|:---|
| CUSIP No. 00445F109 | Page **2** of **4** |

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| | | |
|:---|:---|:---|
| **1** | NAME OF REPORTING PERSONS<br> Atul Chopra, MD, PhD, as trustee of the Chopra Revocable Trust | NAME OF REPORTING PERSONS<br> Atul Chopra, MD, PhD, as trustee of the Chopra Revocable Trust |
| **2** | CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP\*<br> **(a)** <br> **(b)**  | CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP\*<br> **(a)** <br> **(b)**  |
| **3** | SEC USE ONLY | SEC USE ONLY |
| **4** | SOURCE OF FUNDS<br>OO | SOURCE OF FUNDS<br>OO |
| **5** | CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) | CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) |
| **6** | CITIZENSHIP OR PLACE OF ORGANIZATION<br>United States of America | CITIZENSHIP OR PLACE OF ORGANIZATION<br>United States of America |
| NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON WITH | **7** | SOLE VOTING POWER<br>1,469,482 |
| NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON WITH | **8** | SHARED VOTING POWER<br>0 |
| NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON WITH | **9** | SOLE DISPOSITIVE POWER<br>1,469,482 |
| NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON WITH | **10** | SHARED DISPOSITIVE POWER<br>0 |
| **11** | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>1,469,482 | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>1,469,482 |
| **12** | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES |
| **13** | PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)<br>17.4% | PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)<br>17.4% |
| **14** | TYPE OF REPORTING PERSON<br>IN | TYPE OF REPORTING PERSON<br>IN |

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Page **3** of **4**<br>

**Item 1. Security and Issuer.**

This Schedule 13D relates to shares of the common stock, par value $0.001 per share (the "*common stock*"), of Aceragen, Inc. (the "*Company*"), a Delaware corporation with principal executive offices at 505 Eagleview Blvd., Suite 212, Exton, Pennsylvania 19341, beneficially owned by Dr. Atul Chopra.

**Item 2. Identity and Background.**

(a) This Schedule 13D is filed by Atul Chopra, MD, PhD, as trustee of the Chopra Revocable Trust (the "*Trust*"). Dr. Chopra is the sole trustee of the Trust.

(b) Dr. Chopra's residential address is 4002 White Oak Trail, Beachwood, Ohio 44122.

(c) Dr. Chopra is a physician-scientist and medical geneticist specializing in rare genetic disorders of metabolism and energy balance practicing at University Hospitals at 11100 Euclid Avenue, Cleveland, Ohio 44106.

(d) During the last five years, Dr. Chopra has not been convicted in any criminal proceeding (excluding traffic violations).

(e) During the last five years, Dr. Chopra has not been a party to any civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

(f) Dr. Chopra is a citizen of the United States of America.

**Item 3. Source and Amount of Funds or Other Consideration.**

Effective September 28, 2022, the Company issued 1,469,482 shares of common stock (the "*Shares*") to Dr. Chopra in connection with the Company's acquisition via merger of Aceragen, Inc. from Dr. Chopra and other owners of Aceragen.

**Item 4. Purpose of Transaction.**

Dr. Chopra acquired the Shares in connection with the Company's acquisition of Aceragen, Inc. Dr. Chopra does not have any plans or proposals which relate to or would result in any of the events enumerated in Item 4 of Regulation 13d-101 under the Securities and Exchange Act of 1934 ("*Regulation 13d-101*").

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

(a) Dr. Chopra is the record and beneficial owner of 1,469,482 shares of common stock, which is 17.4% of the Company's outstanding common stock assuming 8,461,063 shares of common stock outstanding as reported by the Company on January 17, 2023.

(b) Dr. Chopra has the sole power to vote and to dispose of the Shares.

(c) Dr. Chopra has not engaged in any transactions in the common stock since acquiring the Shares.

(d) Dr. Chopra has the sole right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Shares.

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Page **4** of **4**<br>

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

Dr. Chopra is not a party to any contract, arrangement, understanding or relationship with respect to any securities of the Company required to be disclosed pursuant to Item 6 of Regulation 13d-101.

**Item 7. Material to be Filed as Exhibits.**

Dr. Chopra is not a party to any agreement required to be filed pursuant to Item 7 of Regulation 13d-101.

**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.

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| | |
|:---|:---|
| March 28, 2023 | /s/ Atul Chopra |
|  | Atul Chopra, MD, PhD, as trustee of the Chopra Revocable Trust |

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