# EDGAR Filing Document

**Accession Number:** 0001435049
**File Stem:** 0001193125-23-067605
**Filing Date:** 2023-3
**Character Count:** 32718
**Document Hash:** 98a184d8ad26af6b7a016d93a9688825
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-23-067605.hdr.sgml**: 20230310

**ACCESSION NUMBER**: 0001193125-23-067605

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

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230310

**DATE AS OF CHANGE**: 20230310

**GROUP MEMBERS**: VERSANT VENTURES VI GP, L.P.

**GROUP MEMBERS**: VERSANT VENTURES VI GP-GP, LLC

**GROUP MEMBERS**: VERSANT VENTURES VII GP, L.P.

**GROUP MEMBERS**: VERSANT VENTURES VII GP-GP, LLC

**GROUP MEMBERS**: VERSANT VOYAGEURS I GP CO

**GROUP MEMBERS**: VERSANT VOYAGEURS I GP, L.P.

**GROUP MEMBERS**: VERSANT VOYAGEURS I PARALLEL, L.P.

**GROUP MEMBERS**: VERSANT VOYAGEURS I, L.P.

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** CHINOOK THERAPEUTICS, INC.
- **CENTRAL INDEX KEY:** 0001435049
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SC 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-88812
- **FILM NUMBER:** 23723756

**BUSINESS ADDRESS:**
- **STREET 1:** 400 FAIRVIEW AVENUE NORTH, SUITE 900
- **CITY:** SEATTLE
- **STATE:** WA
- **ZIP:** 98109
- **BUSINESS PHONE:** 206-485-7051

**MAIL ADDRESS:**
- **STREET 1:** 400 FAIRVIEW AVENUE NORTH, SUITE 900
- **CITY:** SEATTLE
- **STATE:** WA
- **ZIP:** 98109

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ADURO BIOTECH, INC.
- **DATE OF NAME CHANGE:** 20111107

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ADURO BIOTECH
- **DATE OF NAME CHANGE:** 20080514
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Versant Venture Capital VII, L.P.
- **CENTRAL INDEX KEY:** 0001750266
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

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

**BUSINESS ADDRESS:**
- **STREET 1:** ONE SANSOME STREET, SUITE 3630
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94104
- **BUSINESS PHONE:** 415-801-8100

**MAIL ADDRESS:**
- **STREET 1:** ONE SANSOME STREET, SUITE 3630
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94104

------

------

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

------

**SCHEDULE 13D** 

**(Rule 13d-102)** 

**INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT** 

**TO RULE 13d-l(a) AND AMENDMENTS THERETO FILED** 

**PURSUANT TO RULE 13d-2(a)** 

**(Amendment No. 6)\*** 

------

## Chinook Therapeutics, Inc.
**(Name of Issuer)** 

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

**(Title of Class of Securities)** 

**16961L 106** 

**(CUSIP Number)** 

**Versant Venture Capital VII, L.P.** 

**Max Eisenberg** 

**One Sansome Street, Suite 3630** 

**San Francisco, CA 94104** 

**415-801-8100** 

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

**March 1, 2023** 

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

------

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. ☐

\* 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 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. 16961L 106 13D

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Persons &nbsp;&nbsp;&nbsp;&nbsp; Versant Venture Capital VII, L.P.

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☒

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

4. &nbsp;&nbsp;&nbsp;&nbsp; Source of Funds (See
Instructions) &nbsp;&nbsp;&nbsp;&nbsp; WC

5. &nbsp;&nbsp;&nbsp;&nbsp; Check if Disclosure of
Legal Proceedings Is Required Pursuant to Item 2(d) or 2(e) &nbsp;&nbsp;&nbsp;&nbsp; ☐

6. &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 | &nbsp;&nbsp;&nbsp;&nbsp;7. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;2,105,107 shares of common stock (1) |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With | &nbsp;&nbsp;&nbsp;&nbsp;8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared 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 | &nbsp;&nbsp;&nbsp;&nbsp;9. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;2,105,107 shares of common stock (1) |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With | 10. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |

---

11. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 2,105,107 shares of common stock (1)

12. &nbsp;&nbsp;&nbsp;&nbsp; Check if the Aggregate
Amount in Row (11) Excludes Certain Shares (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; ☐

13. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row 11 &nbsp;&nbsp;&nbsp;&nbsp; 3.2% (2)

14. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting Person
(See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; PN

(1) These shares are held by Versant VII (as defined in Item 2(a) of the Original Schedule 13D). Versant Ventures
VII GP-GP (as defined in Item 2(a) of the Original Schedule 13D) is the general partner of Versant Ventures VII GP (as defined in Item 2(a) of the Original Schedule 13D), which is the general partner of
Versant VII. Each of Versant Ventures VII GP-GP and Versant Ventures VII GP may be deemed to share voting and dispositive power with respect to the shares held by Versant VII.

(2) The percentages used herein are calculated based upon 65,846,156 shares of the Issuer's common stock
issued and outstanding as of February 17, 2023, as reported in the Issuer's annual report on Form 10-K for the year ended December 31, 2022, filed with the United States Securities and Exchange
Commission (the "Commission") on February 27, 2023 (the "Form 10-K").

------

CUSIP No. 16961L 106 13D

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Persons &nbsp;&nbsp;&nbsp;&nbsp; Versant Ventures VII GP, L.P.

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☒

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

4. &nbsp;&nbsp;&nbsp;&nbsp; Source of Funds (See
Instructions) &nbsp;&nbsp;&nbsp;&nbsp; AF

5. &nbsp;&nbsp;&nbsp;&nbsp; Check if Disclosure of
Legal Proceedings Is Required Pursuant to Item 2(d) or 2(e) &nbsp;&nbsp;&nbsp;&nbsp; ☐

6. &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 | &nbsp;&nbsp;&nbsp;&nbsp;7. | &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 | &nbsp;&nbsp;&nbsp;&nbsp;8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;2,105,107 shares of common stock (1) |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With | &nbsp;&nbsp;&nbsp;&nbsp;9. | &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 | 10. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;2,105,107 shares of common stock (1) |

---

11. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 2,105,107 shares of common stock (1)

12. &nbsp;&nbsp;&nbsp;&nbsp; Check if the Aggregate
Amount in Row (11) Excludes Certain Shares (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; ☐

13. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row 11 &nbsp;&nbsp;&nbsp;&nbsp; 3.2% (2)

14. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting Person
(See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; PN

(1) These shares are held by Versant VII. Versant Ventures VII GP-GP is the
general partner of Versant Ventures VII GP, which is the general partner of Versant VII. Each of Versant Ventures VII GP-GP and Versant Ventures VII GP may be deemed to share voting and dispositive power with
respect to the shares held by Versant VII.

(2) The percentages used herein are calculated based upon 65,846,156 shares of the Issuer's common stock
issued and outstanding as of February 17, 2023, as reported in the Form 10-K.

------

CUSIP No. 16961L 106 13D

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Persons &nbsp;&nbsp;&nbsp;&nbsp; Versant Ventures VII GP-GP, LLC

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☒

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

4. &nbsp;&nbsp;&nbsp;&nbsp; Source of Funds (See
Instructions) &nbsp;&nbsp;&nbsp;&nbsp; AF

5. &nbsp;&nbsp;&nbsp;&nbsp; Check if Disclosure of
Legal Proceedings Is Required Pursuant to Item 2(d) or 2(e) &nbsp;&nbsp;&nbsp;&nbsp; ☐

6. &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 | &nbsp;&nbsp;&nbsp;&nbsp;7. | &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 | &nbsp;&nbsp;&nbsp;&nbsp;8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;2,105,107 shares of common stock (1) |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With | &nbsp;&nbsp;&nbsp;&nbsp;9. | &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 | 10. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;2,105,107 shares of common stock (1) |

---

11. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 2,105,107 shares of common stock (1)

12. &nbsp;&nbsp;&nbsp;&nbsp; Check if the Aggregate
Amount in Row (11) Excludes Certain Shares (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; ☐

13. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row 11 &nbsp;&nbsp;&nbsp;&nbsp; 3.2% (2)

14. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting Person
(See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; OO

(1) These shares are held by Versant VII. Versant Ventures VII GP-GP is the
general partner of Versant Ventures VII GP, which is the general partner of Versant VII. Each of Versant Ventures VII GP-GP and Versant Ventures VII GP may be deemed to share voting and dispositive power with
respect to the shares held by Versant VII.

(2) The percentages used herein are calculated based upon 65,846,156 shares of the Issuer's common stock
issued and outstanding as of February 17, 2023, as reported in the Form 10-K.

------

CUSIP No. 16961L 106 13D

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Persons &nbsp;&nbsp;&nbsp;&nbsp; Versant Voyageurs I Parallel, L.P.

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☒

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

4. &nbsp;&nbsp;&nbsp;&nbsp; Source of Funds (See
Instructions) &nbsp;&nbsp;&nbsp;&nbsp; WC

5. &nbsp;&nbsp;&nbsp;&nbsp; Check if Disclosure of
Legal Proceedings Is Required Pursuant to Item 2(d) or 2(e) &nbsp;&nbsp;&nbsp;&nbsp; ☐

6. &nbsp;&nbsp;&nbsp;&nbsp; Citizenship or Place of
Organization &nbsp;&nbsp;&nbsp;&nbsp; Ontario,
Canada

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With | &nbsp;&nbsp;&nbsp;&nbsp;7. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;210,996 shares of common stock (1) |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With | &nbsp;&nbsp;&nbsp;&nbsp;8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared 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 | &nbsp;&nbsp;&nbsp;&nbsp;9. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;210,996 shares of common stock (1) |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With | 10. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |

---

11. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 210,996 shares of common stock (1)

12. &nbsp;&nbsp;&nbsp;&nbsp; Check if the Aggregate
Amount in Row (11) Excludes Certain Shares (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; ☐

13. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row 11 &nbsp;&nbsp;&nbsp;&nbsp; 0.3% (2)

14. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting Person
(See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; PN

(1) These shares are held by Versant I Parallel (as defined in Item 2(a) of the Original Schedule 13D). Versant
Ventures VI GP-GP (as defined in Item 2(a) of the Original Schedule 13D) is the general partner of Versant Ventures VI GP (as defined in Item 2(a) of the Original Schedule 13D), which is the general partner of
Versant Voyageurs I GP LP (as defined in Item 2(a) of the Original Schedule 13D). Versant Voyageurs I GP LP is the general partner of Versant I Parallel. Each of Versant Voyageurs I GP LP, Versant Ventures VI GP and Versant Ventures VI GP-GP may be deemed to share voting and dispositive power with respect to the shares held by Versant I Parallel.

(2) The percentages used herein are calculated based upon 65,846,156 shares of the Issuer's common stock
issued and outstanding as of February 17, 2023, as reported in the Form 10-K.

------

CUSIP No. 16961L 106 13D

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Persons &nbsp;&nbsp;&nbsp;&nbsp; Versant Voyageurs I GP, L.P.

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☒

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

4. &nbsp;&nbsp;&nbsp;&nbsp; Source of Funds (See
Instructions) &nbsp;&nbsp;&nbsp;&nbsp; AF

5. &nbsp;&nbsp;&nbsp;&nbsp; Check if Disclosure of
Legal Proceedings Is Required Pursuant to Item 2(d) or 2(e) &nbsp;&nbsp;&nbsp;&nbsp; ☐

6. &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 | &nbsp;&nbsp;&nbsp;&nbsp;7. | &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 | &nbsp;&nbsp;&nbsp;&nbsp;8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;210,996 shares of common stock (1) |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With | &nbsp;&nbsp;&nbsp;&nbsp;9. | &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 | 10. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;210,996 shares of common stock (1) |

---

11. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 210,996 shares of common stock (1)

12. &nbsp;&nbsp;&nbsp;&nbsp; Check if the Aggregate
Amount in Row (11) Excludes Certain Shares (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; ☐

13. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row 11 &nbsp;&nbsp;&nbsp;&nbsp; 0.3% (2)

14. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting Person
(See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; PN

(1) These shares are held by Versant I Parallel. Versant Ventures VI GP-GP is the general partner of Versant Ventures VI GP, which is the general partner of Versant Voyageurs I GP LP. Versant Voyageurs I GP LP is the general partner of Versant I Parallel. Each of Versant Voyageurs I GP LP, Versant Ventures VI GP and
Versant Ventures VI GP-GP may be deemed to share voting and dispositive power with respect to the shares held by Versant I Parallel.

(2) The percentages used herein are calculated based upon 65,846,156 shares of the Issuer's common stock
issued and outstanding as of February 17, 2023, as reported in the Form 10-K.

------

CUSIP No. 16961L 106 13D

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Persons &nbsp;&nbsp;&nbsp;&nbsp; Versant Ventures VI GP, L.P.

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☒

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

4. &nbsp;&nbsp;&nbsp;&nbsp; Source of Funds (See
Instructions) &nbsp;&nbsp;&nbsp;&nbsp; AF

5. &nbsp;&nbsp;&nbsp;&nbsp; Check if Disclosure of
Legal Proceedings Is Required Pursuant to Item 2(d) or 2(e) &nbsp;&nbsp;&nbsp;&nbsp; ☐

6. &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 | &nbsp;&nbsp;&nbsp;&nbsp;7. | &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 | &nbsp;&nbsp;&nbsp;&nbsp;8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;210,996 shares of common stock (1) |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With | &nbsp;&nbsp;&nbsp;&nbsp;9. | &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 | 10. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;210,996 shares of common stock (1) |

---

11. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 210,996 shares of common stock (1)

12. &nbsp;&nbsp;&nbsp;&nbsp; Check if the Aggregate
Amount in Row (11) Excludes Certain Shares (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; ☐

13. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row 11 &nbsp;&nbsp;&nbsp;&nbsp; 0.3% (2)

14. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting Person
(See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; PN

(1) These shares are held by Versant I Parallel. Versant Ventures VI GP-GP is the general partner of Versant Ventures VI GP, which is the general partner of Versant Voyageurs I GP LP. Versant Voyageurs I GP LP is the general partner of Versant I Parallel. Each of Versant Voyageurs I GP LP, Versant Ventures VI GP and
Versant Ventures VI GP-GP may be deemed to share voting and dispositive power with respect to the shares held by Versant I Parallel.

(2) The percentages used herein are calculated based upon 65,846,156 shares of the Issuer's common stock
issued and outstanding as of February 17, 2023, as reported in the Form 10-K.

------

CUSIP No. 16961L 106 13D

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Persons &nbsp;&nbsp;&nbsp;&nbsp; Versant Ventures VI GP-GP, LLC

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☒

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

4. &nbsp;&nbsp;&nbsp;&nbsp; Source of Funds (See
Instructions) &nbsp;&nbsp;&nbsp;&nbsp; AF

5. &nbsp;&nbsp;&nbsp;&nbsp; Check if Disclosure of
Legal Proceedings Is Required Pursuant to Item 2(d) or 2(e) &nbsp;&nbsp;&nbsp;&nbsp; ☐

6. &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 | &nbsp;&nbsp;&nbsp;&nbsp;7. | &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 | &nbsp;&nbsp;&nbsp;&nbsp;8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;210,996 shares of common stock (1) |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With | &nbsp;&nbsp;&nbsp;&nbsp;9. | &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 | 10. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;210,996 shares of common stock (1) |

---

11. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 210,996 shares of common stock (1)

12. &nbsp;&nbsp;&nbsp;&nbsp; Check if the Aggregate
Amount in Row (11) Excludes Certain Shares (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; ☐

13. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row 11 &nbsp;&nbsp;&nbsp;&nbsp; 0.3% (2)

14. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting Person
(See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; OO

(1) These shares are held by Versant I Parallel. Versant Ventures VI GP-GP is the general partner of Versant Ventures VI GP, which is the general partner of Versant Voyageurs I GP LP. Versant Voyageurs I GP LP is the general partner of Versant I Parallel. Each of Versant Voyageurs I GP LP, Versant Ventures VI GP and
Versant Ventures VI GP-GP may be deemed to share voting and dispositive power with respect to the shares held by Versant I Parallel.

(2) The percentages used herein are calculated based upon 65,846,156 shares of the Issuer's common stock
issued and outstanding as of February 17, 2023, as reported in the Form 10-K.

------

CUSIP No. 16961L 106 13D

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Persons &nbsp;&nbsp;&nbsp;&nbsp; Versant Voyageurs I, L.P.

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☒

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

4. &nbsp;&nbsp;&nbsp;&nbsp; Source of Funds (See
Instructions) &nbsp;&nbsp;&nbsp;&nbsp; WC

5. &nbsp;&nbsp;&nbsp;&nbsp; Check if Disclosure of
Legal Proceedings Is Required Pursuant to Item 2(d) or 2(e) &nbsp;&nbsp;&nbsp;&nbsp; ☐

6. &nbsp;&nbsp;&nbsp;&nbsp; Citizenship or Place of
Organization &nbsp;&nbsp;&nbsp;&nbsp; Ontario,
Canada

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With | &nbsp;&nbsp;&nbsp;&nbsp;7. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;719,104 shares of common stock (1) |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With | &nbsp;&nbsp;&nbsp;&nbsp;8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared 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 | &nbsp;&nbsp;&nbsp;&nbsp;9. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;719,104 shares of common stock (1) |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With | 10. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |

---

11. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 719,104 shares of common stock (1)

12. &nbsp;&nbsp;&nbsp;&nbsp; Check if the Aggregate
Amount in Row (11) Excludes Certain Shares (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; ☐

13. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row 11 &nbsp;&nbsp;&nbsp;&nbsp; 1.1% (1)

14. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting Person
(See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; PN

(1) These shares are held by Versant Voyageurs I (as defined in Item 2(a) of the Original Schedule 13D). Versant
Voyageurs I GP (as defined in Item 2(a) of the Original Schedule 13D) is the general partner of Versant Voyageurs I and may be deemed to share voting and dispositive power with respect to the shares held by Versant Voyageurs I.

(2) The percentages used herein are calculated based upon 65,846,156 shares of the Issuer's common stock
issued and outstanding as of February 17, 2023, as reported in the Form 10-K.

------

CUSIP No. 16961L 106 13D

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Persons &nbsp;&nbsp;&nbsp;&nbsp; Versant Voyageurs I GP Company

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☒

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

4. &nbsp;&nbsp;&nbsp;&nbsp; Source of Funds (See
Instructions) &nbsp;&nbsp;&nbsp;&nbsp; AF

5. &nbsp;&nbsp;&nbsp;&nbsp; Check if Disclosure of
Legal Proceedings Is Required Pursuant to Item 2(d) or 2(e) &nbsp;&nbsp;&nbsp;&nbsp; ☐

6. &nbsp;&nbsp;&nbsp;&nbsp; Citizenship or Place of
Organization &nbsp;&nbsp;&nbsp;&nbsp; Nova Scotia,
Canada

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With | &nbsp;&nbsp;&nbsp;&nbsp;7. | &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 | &nbsp;&nbsp;&nbsp;&nbsp;8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;719,104 shares of common stock (1) |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With | &nbsp;&nbsp;&nbsp;&nbsp;9. | &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 | 10. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;719,104 shares of common stock (1) |

---

11. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 719,104 shares of common stock (1)

12. &nbsp;&nbsp;&nbsp;&nbsp; Check if the Aggregate
Amount in Row (11) Excludes Certain Shares (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; ☐

13. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row 11 &nbsp;&nbsp;&nbsp;&nbsp; 1.1% (1)

14. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting Person
(See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; OO

(1) These shares are held by Versant Voyageurs I. Versant Voyageurs I GP is the general partner of Versant
Voyageurs I and may be deemed to have voting and dispositive power with respect to the shares held by Versant Voyageurs I.

(2) The percentages used herein are calculated based upon 65,846,156 shares of the Issuer's common stock
issued and outstanding as of February 17, 2023, as reported in the Form 10-K.

------

CUSIP No. 16961L 106 13D

**Explanatory Note:** 

This Amendment No. 6 (this "Amendment") amends and supplements the Schedule 13D originally filed by the Reporting Persons with the Commission on October 15, 2020, as amended by Amendment No. 1 filed with the Commission on September 7, 2021, Amendment No. 2 filed with the Commission on January 13, 2022, Amendment No. 3 filed with the Commission on April 13, 2022, Amendment No. 4 filed with the Commission on August 22, 2022, and Amendment No. 5 filed with the Commission on December 28, 2022 (collectively the "Original Schedule 13D"). Only those items that are hereby reported are amended; all other items reported in the Original Schedule 13D remain unchanged. Information given in response to each item shall be deemed incorporated by reference in all other items, as applicable. Capitalized terms not defined in this Amendment have the meanings ascribed to them in the Original Schedule 13D.

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

Solely on behalf of, and only to the extent that it relates to the Reporting Persons, Item 5 of the Original Schedule 13D is hereby amended as follows:

(a) and (b) See Items 7-11 of the cover pages of this Amendment.

(c) On March 1, 2023, Voyageurs I sold 123,249 shares of Common Stock at a weighted average price per share of $22.75 for aggregate proceeds of approximately $2,803,914.75.

On March 1, 2023, Versant I Parallel sold 36,751 shares of Common Stock at a weighted average price per share of $22.75 for aggregate proceeds of approximately $836,085.25.

On March 1, 2023, Versant VII sold 240,000 shares of Common Stock at a weighted average price per share of $22.75 for aggregate proceeds of approximately $5,460,000.00.

(e) The Reporting Persons ceased to be, in the aggregate, the beneficial owners of more than five percent of the Issuer's Common Stock on March 1, 2023.

------

**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.

---

| | |
|:---|:---|
|  March 10, 2023 | March 10, 2023 |
|  **Versant Venture Capital VII, L.P.** | **Versant Venture Capital VII, L.P.** |
|  By: | Versant Ventures VII GP, L.P. |
|  Its: | General Partner |
|  By: | Versant Ventures VII GP-GP, LLC |
|  Its: | General Partner |
|  By: | /s/ Max Eisenberg, Chief Operating Officer |
|  **Versant Ventures VII GP, L.P.** | **Versant Ventures VII GP, L.P.** |
|  By: | Versant Ventures VII GP-GP, LLC |
|  Its: | General Partner |
|  By: | /s/ Max Eisenberg, Chief Operating Officer |
|  **Versant Ventures VII GP-GP, LLC** | **Versant Ventures VII GP-GP, LLC** |
|  By: | /s/ Max Eisenberg, Chief Operating Officer |
|  **Versant Voyageurs I Parallel, L.P.** | **Versant Voyageurs I Parallel, L.P.** |
|  By: | Versant Voyageurs I GP, L.P. |
|  Its: | General Partner |
|  By: | Versant Ventures VI GP, L.P. |
|  Its: | General Partner |
|  By: | Versant Ventures VI GP-GP, LLC |
|  Its: | General Partner |
|  By: | /s/ Max Eisenberg, Chief Operating Officer |
|  **Versant Ventures VI GP, L.P.** | **Versant Ventures VI GP, L.P.** |
|  By: | Versant Ventures VI GP-GP, LLC |
|  Its: | General Partner |
|  By: | /s/ Max Eisenberg, Chief Operating Officer |
|  **Versant Ventures VI GP-GP, LLC** | **Versant Ventures VI GP-GP, LLC** |
|  By: | /s/ Max Eisenberg, Chief Operating Officer |

---

------

---

| | |
|:---|:---|
| **Versant Voyageurs I GP, L.P.** | **Versant Voyageurs I GP, L.P.** |
| By: | Versant Ventures VI GP, L.P. |
| Its: | General Partner |
| By: | Versant Ventures VI GP-GP, LLC |
| Its: | General Partner |
| By: | /s/ Max Eisenberg, Chief Operating Officer |
| **Versant Voyageurs I, L.P.** | **Versant Voyageurs I, L.P.** |
| By: | Versant Voyageurs I GP Company |
| Its: | General Partner |
| By: | /s/ Max Eisenberg, Chief Operating Officer |
| **Versant Voyageurs I GP Company** | **Versant Voyageurs I GP Company** |
| By: | /s/ Max Eisenberg, Chief Operating Officer |

---