# EDGAR Filing Document

**Accession Number:** 0001773613
**File Stem:** 0001193125-23-039099
**Filing Date:** 2023-2
**Character Count:** 27653
**Document Hash:** 7b3393d308979ae4f5c183f91f713f38
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-23-039099.hdr.sgml**: 20230214

**ACCESSION NUMBER**: 0001193125-23-039099

**CONFORMED SUBMISSION TYPE**: SC 13G

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20230214

**DATE AS OF CHANGE**: 20230214

**GROUP MEMBERS**: CHRISTY SHAFFER

**GROUP MEMBERS**: CLAY B. THORP

**GROUP MEMBERS**: DOUGLAS REED

**GROUP MEMBERS**: HATTERAS VENTURE ADVISORS VI, LLC

**GROUP MEMBERS**: JEFFREY TERRELL

**GROUP MEMBERS**: JOHN C. CRUMPLER

**GROUP MEMBERS**: JOHN M. DIAL

**GROUP MEMBERS**: ROBERT INGRAM

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Vigil Neuroscience, Inc.
- **CENTRAL INDEX KEY:** 0001827087
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SC 13G
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-93233
- **FILM NUMBER:** 23629222

**BUSINESS ADDRESS:**
- **STREET 1:** 100 FORGE ROAD
- **STREET 2:** SUITE 700
- **CITY:** WATERTOWN
- **STATE:** MA
- **ZIP:** 02472
- **BUSINESS PHONE:** 857-254-4445

**MAIL ADDRESS:**
- **STREET 1:** 100 FORGE ROAD
- **STREET 2:** SUITE 700
- **CITY:** WATERTOWN
- **STATE:** MA
- **ZIP:** 02472
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Hatteras Venture Partners VI, LP
- **CENTRAL INDEX KEY:** 0001773613
- **IRS NUMBER:** 833948731
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

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

**BUSINESS ADDRESS:**
- **STREET 1:** 280 S. MANGUM STREET, SUITE 350
- **CITY:** DURHAM
- **STATE:** NC
- **ZIP:** 27701
- **BUSINESS PHONE:** 919-484-0730

**MAIL ADDRESS:**
- **STREET 1:** 280 S. MANGUM STREET, SUITE 350
- **CITY:** DURHAM
- **STATE:** NC
- **ZIP:** 27701

------

------

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**WASHINGTON, D.C. 20549** 

------

**SCHEDULE 13G** 

**(Amendment No.)\*** 

**Under the Securities Exchange Act of 1934** 

------

## Vigil Neuroscience, Inc.
**(Name of Issuer)** 

**Common Stock, par value $0.0001 per share** 

**(Title of Class of Securities)** 

**92673K108** 

**(CUSIP Number)** 

**December 31, 2022** 

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

------

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)

------

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

------

CUSIP No. 92673K108

Page 2 of 16

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; I.R.S.
Identification No. of Above Person (Entities Only) &nbsp;&nbsp;&nbsp;&nbsp; Hatteras Venture
Partners VI, L.P.

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☐ &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

3. &nbsp;&nbsp;&nbsp;&nbsp; SEC Use Only

4. &nbsp;&nbsp;&nbsp;&nbsp; Citizenship or Place of
Organization &nbsp;&nbsp;&nbsp;&nbsp; Delaware

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 5. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 6. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 7. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |

---

9. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 1,562,578

10. &nbsp;&nbsp;&nbsp;&nbsp; Check Box if the Aggregate
Amount in Row (9) Excludes Certain Shares &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

11. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row (9) &nbsp;&nbsp;&nbsp;&nbsp; 4.4%

12. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting
Person &nbsp;&nbsp;&nbsp;&nbsp; PN

------

CUSIP No. 92673K108

Page 3 of 16

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; I.R.S.
Identification No. of Above Person (Entities Only) &nbsp;&nbsp;&nbsp;&nbsp; Hatteras Venture
Advisors VI, LLC

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☐ &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

3. &nbsp;&nbsp;&nbsp;&nbsp; SEC Use Only

4. &nbsp;&nbsp;&nbsp;&nbsp; Citizenship or Place of
Organization &nbsp;&nbsp;&nbsp;&nbsp; North
Carolina

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 5. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 6. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 7. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |

---

9. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 1,562,578

10. &nbsp;&nbsp;&nbsp;&nbsp; Check Box if the Aggregate
Amount in Row (9) Excludes Certain Shares &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

11. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row (9) &nbsp;&nbsp;&nbsp;&nbsp; 4.4%

12. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting
Person &nbsp;&nbsp;&nbsp;&nbsp; OO

------

CUSIP No. 92673K108

Page 4 of 16

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; I.R.S.
Identification No. of Above Person (Entities Only) &nbsp;&nbsp;&nbsp;&nbsp; John C.
Crumpler

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☐ &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

3. &nbsp;&nbsp;&nbsp;&nbsp; SEC Use Only

4. &nbsp;&nbsp;&nbsp;&nbsp; Citizenship or Place of
Organization &nbsp;&nbsp;&nbsp;&nbsp; United States of
America

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 5. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 6. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 7. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |

---

9. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 1,562,578

10. &nbsp;&nbsp;&nbsp;&nbsp; Check Box if the Aggregate
Amount in Row (9) Excludes Certain Shares &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

11. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row (9) &nbsp;&nbsp;&nbsp;&nbsp; 4.4%

12. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting
Person &nbsp;&nbsp;&nbsp;&nbsp; IN

------

CUSIP No. 92673K108

Page 5 of 16

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; I.R.S.
Identification No. of Above Person (Entities Only) &nbsp;&nbsp;&nbsp;&nbsp; Clay B.
Thorp

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☐ &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

3. &nbsp;&nbsp;&nbsp;&nbsp; SEC Use Only

4. &nbsp;&nbsp;&nbsp;&nbsp; Citizenship or Place of
Organization &nbsp;&nbsp;&nbsp;&nbsp; United States of
America

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 5. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;3,000 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 6. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 7. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;3,000 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |

---

9. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 1,565,578

10. &nbsp;&nbsp;&nbsp;&nbsp; Check Box if the Aggregate
Amount in Row (9) Excludes Certain Shares &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

11. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row (9) &nbsp;&nbsp;&nbsp;&nbsp; 4.4%

12. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting
Person &nbsp;&nbsp;&nbsp;&nbsp; IN

------

CUSIP No. 92673K108

Page 6 of 16

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; I.R.S.
Identification No. of Above Person (Entities Only) &nbsp;&nbsp;&nbsp;&nbsp; Douglas
Reed

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☐ &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

3. &nbsp;&nbsp;&nbsp;&nbsp; SEC Use Only

4. &nbsp;&nbsp;&nbsp;&nbsp; Citizenship or Place of
Organization &nbsp;&nbsp;&nbsp;&nbsp; United States of
America

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 5. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 6. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 7. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |

---

9. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 1,562,578

10. &nbsp;&nbsp;&nbsp;&nbsp; Check Box if the Aggregate
Amount in Row (9) Excludes Certain Shares &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

11. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row (9) &nbsp;&nbsp;&nbsp;&nbsp; 4.4%

12. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting
Person &nbsp;&nbsp;&nbsp;&nbsp; IN

------

CUSIP No. 92673K108

Page 7 of 16

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; I.R.S.
Identification No. of Above Person (Entities Only) &nbsp;&nbsp;&nbsp;&nbsp; Robert
Ingram

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☐ &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

3. &nbsp;&nbsp;&nbsp;&nbsp; SEC Use Only

4. &nbsp;&nbsp;&nbsp;&nbsp; Citizenship or Place of
Organization &nbsp;&nbsp;&nbsp;&nbsp; United States of
America

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 5. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 6. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 7. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |

---

9. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 1,562,578

10. &nbsp;&nbsp;&nbsp;&nbsp; Check Box if the Aggregate
Amount in Row (9) Excludes Certain Shares &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

11. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row (9) &nbsp;&nbsp;&nbsp;&nbsp; 4.4%

12. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting
Person &nbsp;&nbsp;&nbsp;&nbsp; IN

------

CUSIP No. 92673K108

Page 8 of 16

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; I.R.S.
Identification No. of Above Person (Entities Only) &nbsp;&nbsp;&nbsp;&nbsp; Christy
Shaffer

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☐ &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

3. &nbsp;&nbsp;&nbsp;&nbsp; SEC Use Only

4. &nbsp;&nbsp;&nbsp;&nbsp; Citizenship or Place of
Organization &nbsp;&nbsp;&nbsp;&nbsp; United States of
America

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 5. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 6. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 7. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |

---

9. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 1,562,578

10. &nbsp;&nbsp;&nbsp;&nbsp; Check Box if the Aggregate
Amount in Row (9) Excludes Certain Shares &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

11. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row (9) &nbsp;&nbsp;&nbsp;&nbsp; 4.4%

12. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting
Person &nbsp;&nbsp;&nbsp;&nbsp; IN

------

CUSIP No. 92673K108

Page 9 of 16

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; I.R.S.
Identification No. of Above Person (Entities Only) &nbsp;&nbsp;&nbsp;&nbsp; John M.
Dial

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☐ &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

3. &nbsp;&nbsp;&nbsp;&nbsp; SEC Use Only

4. &nbsp;&nbsp;&nbsp;&nbsp; Citizenship or Place of
Organization &nbsp;&nbsp;&nbsp;&nbsp; United States of
America

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 5. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 6. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 7. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |

---

9. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 1,562,578

10. &nbsp;&nbsp;&nbsp;&nbsp; Check Box if the Aggregate
Amount in Row (9) Excludes Certain Shares &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

11. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row (9) &nbsp;&nbsp;&nbsp;&nbsp; 4.4%

12. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting
Person &nbsp;&nbsp;&nbsp;&nbsp; IN

------

CUSIP No. 92673K108

Page 10 of 16

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; I.R.S.
Identification No. of Above Person (Entities Only) &nbsp;&nbsp;&nbsp;&nbsp; Jeffrey
Terrell

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☐ &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

3. &nbsp;&nbsp;&nbsp;&nbsp; SEC Use Only

4. &nbsp;&nbsp;&nbsp;&nbsp; Citizenship or Place of
Organization &nbsp;&nbsp;&nbsp;&nbsp; United States of
America

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 5. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 6. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 7. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned By<br> Each<br> Reporting<br> Person<br> with | 8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;1,562,578 |

---

9. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 1,562,578

10. &nbsp;&nbsp;&nbsp;&nbsp; Check Box if the Aggregate
Amount in Row (9) Excludes Certain Shares &nbsp;&nbsp;&nbsp;&nbsp; Not Applicable

11. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row (9) &nbsp;&nbsp;&nbsp;&nbsp; 4.4%

12. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting
Person &nbsp;&nbsp;&nbsp;&nbsp; IN

------

CUSIP No. 92673K108

Page 11 of 16

---

| | |
|:---|:---|
| **Item 1(a)** | **Name of Issuer**  |

---

Vigil Neuroscience, Inc. (the "**Issuer**")

---

| | |
|:---|:---|
| **Item 1(b)** | **Address of Issuer's Principal Executive Offices**  |

---

1 Broadway, 7<sup>th</sup> Floor, Suite 07-300, Cambridge, Massachusetts 02142

---

| | |
|:---|:---|
| **Item 2(a)** | **Name of Person Filing**  |

---

This Schedule 13G is being filed by:

Hatteras Venture Partners VI, L.P. ("**HVP VI**")

Hatteras Venture Advisors VI, LLC ("**HVA VI**")

John C. Crumpler

Clay B. Thorp

Douglas Reed

Robert Ingram

Christy Shaffer

John M. Dial

Jeffrey Terrell

(collectively, the "**Reporting Persons**").

---

| | |
|:---|:---|
| **Item 2(b)** | **Address of Principal Business Office, or if none, Residence**  |

---

280 S. Mangum Street, Suite 350, Durham, North Carolina 27701.

---

| | |
|:---|:---|
| **Item 2(c)** | **Citizenship**  |

---

The Reporting Persons are citizens of:

HVP VI — Delaware

HVA VI — North Carolina

John C. Crumpler — USA

Clay B. Thorp — USA

Douglas Reed — USA

Robert Ingram — USA

Christy Shaffer — USA

John M. Dial — USA

Jeffrey Terrell — USA

---

| | |
|:---|:---|
| **Item 2(d)** | **Title of Class of Securities**  |

---

Common Stock, par value $0.0001 per share ("**Common Stock**")

---

| | |
|:---|:---|
| **Item 2(e)** | **CUSIP Number**  |

---

92673K108

------

CUSIP No. 92673K108

Page 12 of 16

**Item 3.** **Filing pursuant to Rules 13d-1(b) or 13d-2(b) or (c)** <br>

Not Applicable

**Item 4.** **Ownership** <br>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) The Reporting Persons, with the exception of Mr. Thorp who beneficially owns an aggregate of 1,565,578 shares of the Issuer's Common Stock due to shares he holds personally, are the beneficial owners of an aggregate of 1,562,578 shares of Common Stock, which represents 4.4% of the Issuer's outstanding Common Stock based upon 35,581,091 shares outstanding on October 31, 2022 as reported by the Issuer in its Form 10-Q for the quarterly period ended September 30, 2022 as filed with the Securities and Exchange Commission on November 10, 2022.

HVA VI is the general partner of HVP VI. The shares are held directly by HVP VI. The shares held by HVP VI are indirectly held by the individual managing members of the general partners, HVA VI (the "**GP Managing Members**"). The GP Managing Members are John C. Crumpler, Clay B. Thorp, Douglas Reed, Robert Ingram, Christy Shaffer, John M. Dial and Jeffrey Terrell. The GP Managing Members may share voting and dispositive power over the securities directly held by HVP VI.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) Percent of class:

HVP VI — 4.4%

HVA VI — 4.4%

John C. Crumpler — 4.4%

Clay B. Thorp — 4.4%

Douglas Reed — 4.4%

Robert Ingram — 4.4%

Christy Shaffer — 4.4%

John M. Dial — 4.4%

Jeffrey Terrell — 4.4%

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) Number of shares as to which such person has:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) Sole power to vote or to direct the vote: 0

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) Shared power to vote or to direct the vote:

HVP VI — 1,562,578

HVA VI — 1,562,578

John C. Crumpler — 1,562,578

Clay B. Thorp — 1,565,578

Douglas Reed — 1,562,578

Robert Ingram — 1,562,578

Christy Shaffer — 1,562,578

John M. Dial — 1,562,578

Jeffrey Terrell — 1,562,578

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) Sole power to dispose or to direct the disposition of: 0

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CUSIP No. 92673K108

Page 13 of 16

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iv) Shared power to dispose or to direct the disposition of:

HVP VI — 1,562,578

HVA VI— 1,562,578

John C. Crumpler — 1,562,578

Clay B. Thorp — 1,565,578

Douglas Reed — 1,562,578

Robert Ingram — 1,562,578

Christy Shaffer — 1,562,578

John M. Dial — 1,562,578

Jeffrey Terrell — 1,562,578

**Item 5.** **Ownership of Five Percent or Less of a Class** <br>

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 Five Percent on Behalf of Another Person** <br>

Not Applicable

**Item 7.** **Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company** <br>

Not Applicable

**Item 8.** **Identification and Classification of Members of the Group** <br>

Not Applicable

**Item 9.** **Notice of Dissolution of Group** <br>

Not Applicable

**Item 10.** **Certification** <br>

By signing below each of the undersigned certifies that, to the best of his, her or its knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under §240.14a-11.

**<u>Exhibit Index</u>**

Exhibit A –Agreement Regarding the Joint Filing of Schedule 13G

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CUSIP No. 92673K108

Page 14 of 16

**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.

Date: February 14, 2023

---

| | |
|:---|:---|
| HATTERAS VENTURE PARTNERS VI, L.P. | HATTERAS VENTURE PARTNERS VI, L.P. |
| By: | Hatteras Venture Advisors VI, LLC, its general partner |
| By: | /s/ Clay B. Thorp |
|  | Manager |
| HATTERAS VENTURE ADVISORS VI, LLC | HATTERAS VENTURE ADVISORS VI, LLC |
| By: | /s/ Clay B. Thorp |
|  | Manager |

---

---

| |
|:---|
| /s/ John C. Crumpler |
| John C. Crumpler |
| /s/ Clay B. Thorp |
| Clay B. Thorp |
| /s/ Douglas Reed |
| Douglas Reed |
| /s/ Robert Ingram |
| Robert Ingram |
| /s/ Christy Shaffer |
| Christy Shaffer |
| /s/ John M. Dial |
| John M. Dial |
| /s/ Jeffrey Terrell |
| Jeffrey Terrell |

---

## Ex-99.A

CUSIP No. 92673K108

Page 15 of 16

**<u>Exhibit A</u>**

**AGREEMENT REGARDING THE JOINT FILING OF SCHEDULE 13G** 

The undersigned, being duly authorized thereunto, hereby execute this agreement as an exhibit to this Schedule 13G to evidence the agreement of the below-named parties, in accordance with the rules promulgated pursuant to the Securities Exchange Act of 1934, to file this Schedule jointly on behalf of each such party.

Date: February 14, 2023

[*Signature Pages Follow*]

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CUSIP No. 92673K108

Page 16 of 16

IN WITNESS WHEREOF, the parties hereto have executed and delivered this Agreement as of the date first written above.

---

| | |
|:---|:---|
| HATTERAS VENTURE PARTNERS VI, L.P. | HATTERAS VENTURE PARTNERS VI, L.P. |
| By: | Hatteras Venture Advisors VI, LLC, its general partner |
| By: | /s/ Clay B. Thorp |
|  | Manager |
| HATTERAS VENTURE ADVISORS VI, LLC | HATTERAS VENTURE ADVISORS VI, LLC |
| By: | /s/ Clay B. Thorp |
|  | Manager |

---

---

| |
|:---|
| /s/ John C. Crumpler |
| John C. Crumpler |
| /s/ Clay B. Thorp |
| Clay B. Thorp |
| /s/ Douglas Reed |
| Douglas Reed |
| /s/ Robert Ingram |
| Robert Ingram |
| /s/ Christy Shaffer |
| Christy Shaffer |
| /s/ John M. Dial |
| John M. Dial |
| /s/ Jeffrey Terrell |
| Jeffrey Terrell |

---