# EDGAR Filing Document

**Accession Number:** 0001339970
**File Stem:** 0001104659-23-021596
**Filing Date:** 2023-2
**Character Count:** 55288
**Document Hash:** 044a3491fcc29b48907143d0fb57c63c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-23-021596.hdr.sgml**: 20230214

**ACCESSION NUMBER**: 0001104659-23-021596

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

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230214

**DATE AS OF CHANGE**: 20230214

**GROUP MEMBERS**: KOH, BONG

**GROUP MEMBERS**: SHAH, NIMISH

**GROUP MEMBERS**: VENROCK HEALTHCARE CAPITAL PARTNERS EG, L.P.

**GROUP MEMBERS**: VENROCK HEALTHCARE CAPITAL PARTNERS III, L.P.

**GROUP MEMBERS**: VHCP CO-INVESTMENT HOLDINGS II, LLC

**GROUP MEMBERS**: VHCP CO-INVESTMENT HOLDINGS III, LLC

**GROUP MEMBERS**: VHCP MANAGEMENT EG, LLC

**GROUP MEMBERS**: VHCP MANAGEMENT II, LLC

**GROUP MEMBERS**: VHCP MANAGEMENT III, LLC

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** aTYR PHARMA INC
- **CENTRAL INDEX KEY:** 0001339970
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **IRS NUMBER:** 203435077
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SC 13G/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-88839
- **FILM NUMBER:** 23629043

**BUSINESS ADDRESS:**
- **STREET 1:** 3545 JOHN HOPKINS COURT, STE #250
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92121
- **BUSINESS PHONE:** 858-731-8389

**MAIL ADDRESS:**
- **STREET 1:** 3545 JOHN HOPKINS COURT, STE #250
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92121
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Venrock Healthcare Capital Partners II, L.P.
- **CENTRAL INDEX KEY:** 0001602264
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

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

**BUSINESS ADDRESS:**
- **STREET 1:** 7 BRYANT PARK
- **STREET 2:** 23RD FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10018
- **BUSINESS PHONE:** 650 475 3734

**MAIL ADDRESS:**
- **STREET 1:** 7 BRYANT PARK
- **STREET 2:** 23RD FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10018

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**WASHINGTON, D.C. 20549**

**SCHEDULE 13G/A**

**UNDER THE SECURITIES EXCHANGE ACT OF 1934<br> (Amendment No. 2)\***

**aTyr Pharma, Inc.**

**(Name of Issuer)**

**Common Stock, $0.001 par value**

**(Title of Class of Securities)**

**002120202**

**(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)

&nbsp;&nbsp;&nbsp;&nbsp;⌧ 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 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 in 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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| **CUSIP No. 002120202** | Page 2 of 17 |

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| &nbsp;&nbsp;&nbsp;1. | <br> Name of reporting persons<br> Venrock Healthcare Capital Partners II, L.P. | <br> Name of reporting persons<br> Venrock Healthcare Capital Partners II, L.P. | <br> Name of reporting persons<br> Venrock Healthcare Capital Partners II, L.P. |
| &nbsp;&nbsp;&nbsp;2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ |
| &nbsp;&nbsp;&nbsp;3. | <br> SEC USE ONLY | <br> SEC USE ONLY | <br> SEC USE ONLY |
| &nbsp;&nbsp;&nbsp;4. | <br> Citizenship or Place of Organization<br> Delaware | <br> Citizenship or Place of Organization<br> Delaware | <br> Citizenship or Place of Organization<br> Delaware |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 5. | Sole Voting Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 6. | Shared Voting Power<br> 1,171,436<sup>2</sup> |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 7. | Sole Dispositive Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 8. | Shared Dispositive Power<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;9. | <br> Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | <br> Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | <br> Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;10. | <br> Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | <br> Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | <br> Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ |
| &nbsp;&nbsp;&nbsp;11. | <br> Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | <br> Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | <br> Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> |
| &nbsp;&nbsp;&nbsp;12. | <br> Type of Reporting Person (See Instructions)<br> PN | <br> Type of Reporting Person (See Instructions)<br> PN | <br> Type of Reporting Person (See Instructions)<br> PN |

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|:---|:---|
| 1 | Venrock Healthcare Capital Partners II, L.P., VHCP Co-Investment Holdings II, LLC, Venrock Healthcare Capital Partners III, L.P., VHCP Co-Investment Holdings III, LLC, Venrock Healthcare Capital Partners EG, L.P., VHCP Management II, LLC, VHCP Management III, LLC, VHCP Management EG, LLC, Nimish Shah and Bong Koh are members of a group for the purposes of this Schedule 13G/A. |

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|:---|:---|
| 2 | Consists of (i) 192,869 shares held by Venrock Healthcare Capital Partners II, L.P., (ii) 78,203 shares held by VHCP Co-Investment Holdings II, LLC, (iii) 395,011 shares held by Venrock Healthcare Capital Partners III, L.P., (iv) 39,525 shares held by VHCP Co-Investment Holdings III, LLC and (v) 465,828 shares held by Venrock Healthcare Capital Partners EG, L.P. |

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|:---|:---|
| 3 | This percentage is calculated based upon 29,009,382 shares of the Issuer's Common Stock outstanding as of November 8, 2022, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 14, 2022. |

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| **CUSIP No. 002120202** | Page 3 of 17 |

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|:---|:---|:---|:---|
| &nbsp;&nbsp;&nbsp;1. | Name of reporting persons<br> VHCP Co-Investment Holdings II, LLC | Name of reporting persons<br> VHCP Co-Investment Holdings II, LLC | Name of reporting persons<br> VHCP Co-Investment Holdings II, LLC |
| &nbsp;&nbsp;&nbsp;2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ |
| &nbsp;&nbsp;&nbsp;3. | SEC USE ONLY | SEC USE ONLY | SEC USE ONLY |
| &nbsp;&nbsp;&nbsp;4. | Citizenship or Place of Organization<br> Delaware | Citizenship or Place of Organization<br> Delaware | Citizenship or Place of Organization<br> Delaware |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 5. | Sole Voting Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 6. | Shared Voting Power<br> 1,171,436<sup>2</sup> |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 7. | Sole Dispositive Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 8. | Shared Dispositive Power<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;10. | <br> Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | <br> Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | <br> Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ |
| &nbsp;&nbsp;&nbsp;11. | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> |
| &nbsp;&nbsp;&nbsp;12. | Type of Reporting Person (See Instructions)<br> OO | Type of Reporting Person (See Instructions)<br> OO | Type of Reporting Person (See Instructions)<br> OO |

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|:---|:---|
| 1 | Venrock Healthcare Capital Partners II, L.P., VHCP Co-Investment Holdings II, LLC, Venrock Healthcare Capital Partners III, L.P., VHCP Co-Investment Holdings III, LLC, Venrock Healthcare Capital Partners EG, L.P., VHCP Management II, LLC, VHCP Management III, LLC, VHCP Management EG, LLC, Nimish Shah and Bong Koh are members of a group for the purposes of this Schedule 13G/A. |

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|:---|:---|
| 2 | Consists of (i) 192,869 shares held by Venrock Healthcare Capital Partners II, L.P., (ii) 78,203 shares held by VHCP Co-Investment Holdings II, LLC, (iii) 395,011 shares held by Venrock Healthcare Capital Partners III, L.P., (iv) 39,525 shares held by VHCP Co-Investment Holdings III, LLC and (v) 465,828 shares held by Venrock Healthcare Capital Partners EG, L.P. |

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| | |
|:---|:---|
| 3 | This percentage is calculated based upon 29,009,382 shares of the Issuer's Common Stock outstanding as of November 8, 2022, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 14, 2022. |

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|:---|:---|
| **CUSIP No. 002120202** | Page 4 of 17 |

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|:---|:---|:---|:---|
| &nbsp;&nbsp;&nbsp;1. | Name of reporting persons<br> Venrock Healthcare Capital Partners III, L.P. | Name of reporting persons<br> Venrock Healthcare Capital Partners III, L.P. | Name of reporting persons<br> Venrock Healthcare Capital Partners III, L.P. |
| &nbsp;&nbsp;&nbsp;2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ |
| &nbsp;&nbsp;&nbsp;3. | <br> SEC USE ONLY | <br> SEC USE ONLY | <br> SEC USE ONLY |
| &nbsp;&nbsp;&nbsp;4. | Citizenship or Place of Organization<br> Delaware | Citizenship or Place of Organization<br> Delaware | Citizenship or Place of Organization<br> Delaware |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 5. | Sole Voting Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 6. | Shared Voting Power<br> 1,171,436<sup>2</sup> |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 7. | Sole Dispositive Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 8. | Shared Dispositive Power<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ |
| &nbsp;&nbsp;&nbsp;11. | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> |
| &nbsp;&nbsp;&nbsp;12. | Type of Reporting Person (See Instructions)<br> PN | Type of Reporting Person (See Instructions)<br> PN | Type of Reporting Person (See Instructions)<br> PN |

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|:---|:---|
| 1 | Venrock Healthcare Capital Partners II, L.P., VHCP Co-Investment Holdings II, LLC, Venrock Healthcare Capital Partners III, L.P., VHCP Co-Investment Holdings III, LLC, Venrock Healthcare Capital Partners EG, L.P., VHCP Management II, LLC, VHCP Management III, LLC, VHCP Management EG, LLC, Nimish Shah and Bong Koh are members of a group for the purposes of this Schedule 13G/A. |

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|:---|:---|
| 2 | Consists of (i) 192,869 shares held by Venrock Healthcare Capital Partners II, L.P., (ii) 78,203 shares held by VHCP Co-Investment Holdings II, LLC, (iii) 395,011 shares held by Venrock Healthcare Capital Partners III, L.P., (iv) 39,525 shares held by VHCP Co-Investment Holdings III, LLC and (v) 465,828 shares held by Venrock Healthcare Capital Partners EG, L.P. |

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| | |
|:---|:---|
| 3 | This percentage is calculated based upon 29,009,382 shares of the Issuer's Common Stock outstanding as of November 8, 2022, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 14, 2022. |

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|:---|:---|
| **CUSIP No. 002120202** | Page 5 of 17 |

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|:---|:---|:---|:---|
| &nbsp;&nbsp;&nbsp;1. | Name of reporting persons<br> VHCP Co-Investment Holdings III, LLC | Name of reporting persons<br> VHCP Co-Investment Holdings III, LLC | Name of reporting persons<br> VHCP Co-Investment Holdings III, LLC |
| &nbsp;&nbsp;&nbsp;2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ |
| &nbsp;&nbsp;&nbsp;3. | SEC USE ONLY | SEC USE ONLY | SEC USE ONLY |
| &nbsp;&nbsp;&nbsp;4. | Citizenship or Place of Organization<br> Delaware | Citizenship or Place of Organization<br> Delaware | Citizenship or Place of Organization<br> Delaware |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 5. | Sole Voting Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 6. | Shared Voting Power<br> 1,171,436<sup>2</sup> |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 7. | Sole Dispositive Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 8. | Shared Dispositive Power<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ |
| &nbsp;&nbsp;&nbsp;11. | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> |
| &nbsp;&nbsp;&nbsp;12. | Type of Reporting Person (See Instructions)<br> OO | Type of Reporting Person (See Instructions)<br> OO | Type of Reporting Person (See Instructions)<br> OO |

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|:---|:---|
| 1 | Venrock Healthcare Capital Partners II, L.P., VHCP Co-Investment Holdings II, LLC, Venrock Healthcare Capital Partners III, L.P., VHCP Co-Investment Holdings III, LLC, Venrock Healthcare Capital Partners EG, L.P., VHCP Management II, LLC, VHCP Management III, LLC, VHCP Management EG, LLC, Nimish Shah and Bong Koh are members of a group for the purposes of this Schedule 13G/A. |

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|:---|:---|
| 2 | Consists of (i) 192,869 shares held by Venrock Healthcare Capital Partners II, L.P., (ii) 78,203 shares held by VHCP Co-Investment Holdings II, LLC, (iii) 395,011 shares held by Venrock Healthcare Capital Partners III, L.P., (iv) 39,525 shares held by VHCP Co-Investment Holdings III, LLC and (v) 465,828 shares held by Venrock Healthcare Capital Partners EG, L.P. |

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| | |
|:---|:---|
| 3 | This percentage is calculated based upon 29,009,382 shares of the Issuer's Common Stock outstanding as of November 8, 2022, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 14, 2022. |

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|:---|:---|
| **CUSIP No. 002120202** | Page 6 of 17 |

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|:---|:---|:---|:---|
| &nbsp;&nbsp;&nbsp;1. | Name of reporting persons<br> Venrock Healthcare Capital Partners EG, L.P. | Name of reporting persons<br> Venrock Healthcare Capital Partners EG, L.P. | Name of reporting persons<br> Venrock Healthcare Capital Partners EG, L.P. |
| &nbsp;&nbsp;&nbsp;2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ |
| &nbsp;&nbsp;&nbsp;3. | SEC USE ONLY | SEC USE ONLY | SEC USE ONLY |
| &nbsp;&nbsp;&nbsp;4. | Citizenship or Place of Organization<br> Delaware | Citizenship or Place of Organization<br> Delaware | Citizenship or Place of Organization<br> Delaware |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 5. | Sole Voting Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 6. | Shared Voting Power<br> 1,171,436<sup>2</sup> |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 7. | Sole Dispositive Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 8. | Shared Dispositive Power<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ |
| &nbsp;&nbsp;&nbsp;11. | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> |
| &nbsp;&nbsp;&nbsp;12. | Type of Reporting Person (See Instructions)<br> PN | Type of Reporting Person (See Instructions)<br> PN | Type of Reporting Person (See Instructions)<br> PN |

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| | |
|:---|:---|
| 1 | Venrock Healthcare Capital Partners II, L.P., VHCP Co-Investment Holdings II, LLC, Venrock Healthcare Capital Partners III, L.P., VHCP Co-Investment Holdings III, LLC, Venrock Healthcare Capital Partners EG, L.P., VHCP Management II, LLC, VHCP Management III, LLC, VHCP Management EG, LLC, Nimish Shah and Bong Koh are members of a group for the purposes of this Schedule 13G/A. |

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| | |
|:---|:---|
| 2 | Consists of (i) 192,869 shares held by Venrock Healthcare Capital Partners II, L.P., (ii) 78,203 shares held by VHCP Co-Investment Holdings II, LLC, (iii) 395,011 shares held by Venrock Healthcare Capital Partners III, L.P., (iv) 39,525 shares held by VHCP Co-Investment Holdings III, LLC and (v) 465,828 shares held by Venrock Healthcare Capital Partners EG, L.P. |

---

---

| | |
|:---|:---|
| 3 | This percentage is calculated based upon 29,009,382 shares of the Issuer's Common Stock outstanding as of November 8, 2022, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 14, 2022. |

---

---

| | |
|:---|:---|
| **CUSIP No. 002120202** | Page 7 of 17 |

---

---

| | | | |
|:---|:---|:---|:---|
| &nbsp;&nbsp;&nbsp;1. | Name of reporting persons<br> VHCP Management II, LLC | Name of reporting persons<br> VHCP Management II, LLC | Name of reporting persons<br> VHCP Management II, LLC |
| &nbsp;&nbsp;&nbsp;2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ |
| &nbsp;&nbsp;&nbsp;3. | SEC USE ONLY | SEC USE ONLY | SEC USE ONLY |
| &nbsp;&nbsp;&nbsp;4. | Citizenship or Place of Organization<br> Delaware | Citizenship or Place of Organization<br> Delaware | Citizenship or Place of Organization<br> Delaware |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 5. | Sole Voting Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 6. | Shared Voting Power<br> 1,171,436<sup>2</sup> |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 7. | Sole Dispositive Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 8. | Shared Dispositive Power<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ |
| &nbsp;&nbsp;&nbsp;11. | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> |
| &nbsp;&nbsp;&nbsp;12. | Type of Reporting Person (See Instructions)<br> OO | Type of Reporting Person (See Instructions)<br> OO | Type of Reporting Person (See Instructions)<br> OO |

---

---

| | |
|:---|:---|
| 1 | Venrock Healthcare Capital Partners II, L.P., VHCP Co-Investment Holdings II, LLC, Venrock Healthcare Capital Partners III, L.P., VHCP Co-Investment Holdings III, LLC, Venrock Healthcare Capital Partners EG, L.P., VHCP Management II, LLC, VHCP Management III, LLC, VHCP Management EG, LLC, Nimish Shah and Bong Koh are members of a group for the purposes of this Schedule 13G/A. |

---

---

| | |
|:---|:---|
| 2 | Consists of (i) 192,869 shares held by Venrock Healthcare Capital Partners II, L.P., (ii) 78,203 shares held by VHCP Co-Investment Holdings II, LLC, (iii) 395,011 shares held by Venrock Healthcare Capital Partners III, L.P., (iv) 39,525 shares held by VHCP Co-Investment Holdings III, LLC and (v) 465,828 shares held by Venrock Healthcare Capital Partners EG, L.P. |

---

---

| | |
|:---|:---|
| 3 | This percentage is calculated based upon 29,009,382 shares of the Issuer's Common Stock outstanding as of November 8, 2022, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 14, 2022. |

---

---

| | |
|:---|:---|
| **CUSIP No. 002120202** | Page 8 of 17 |

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---

| | | | |
|:---|:---|:---|:---|
| &nbsp;&nbsp;&nbsp;1. | Name of reporting persons<br> VHCP Management III, LLC | Name of reporting persons<br> VHCP Management III, LLC | Name of reporting persons<br> VHCP Management III, LLC |
| &nbsp;&nbsp;&nbsp;2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ |
| &nbsp;&nbsp;&nbsp;3. | SEC USE ONLY | SEC USE ONLY | SEC USE ONLY |
| &nbsp;&nbsp;&nbsp;4. | Citizenship or Place of Organization<br> Delaware | Citizenship or Place of Organization<br> Delaware | Citizenship or Place of Organization<br> Delaware |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 5. | Sole Voting Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 6. | Shared Voting Power<br> 1,171,436<sup>2</sup> |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 7. | Sole Dispositive Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 8. | Shared Dispositive Power<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ |
| &nbsp;&nbsp;&nbsp;11. | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> |
| &nbsp;&nbsp;&nbsp;12. | Type of Reporting Person (See Instructions)<br> OO | Type of Reporting Person (See Instructions)<br> OO | Type of Reporting Person (See Instructions)<br> OO |

---

---

| | |
|:---|:---|
| 1 | Venrock Healthcare Capital Partners II, L.P., VHCP Co-Investment Holdings II, LLC, Venrock Healthcare Capital Partners III, L.P., VHCP Co-Investment Holdings III, LLC, Venrock Healthcare Capital Partners EG, L.P., VHCP Management II, LLC, VHCP Management III, LLC, VHCP Management EG, LLC, Nimish Shah and Bong Koh are members of a group for the purposes of this Schedule 13G/A. |

---

---

| | |
|:---|:---|
| 2 | Consists of (i) 192,869 shares held by Venrock Healthcare Capital Partners II, L.P., (ii) 78,203 shares held by VHCP Co-Investment Holdings II, LLC, (iii) 395,011 shares held by Venrock Healthcare Capital Partners III, L.P., (iv) 39,525 shares held by VHCP Co-Investment Holdings III, LLC and (v) 465,828 shares held by Venrock Healthcare Capital Partners EG, L.P. |

---

---

| | |
|:---|:---|
| 3 | This percentage is calculated based upon 29,009,382 shares of the Issuer's Common Stock outstanding as of November 8, 2022, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 14, 2022. |

---

---

| | |
|:---|:---|
| **CUSIP No. 002120202** | Page 9 of 17 |

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---

| | | | |
|:---|:---|:---|:---|
| &nbsp;&nbsp;&nbsp;1. | Name of reporting persons<br> VHCP Management EG, LLC | Name of reporting persons<br> VHCP Management EG, LLC | Name of reporting persons<br> VHCP Management EG, LLC |
| &nbsp;&nbsp;&nbsp;2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ |
| &nbsp;&nbsp;&nbsp;3. | SEC USE ONLY | SEC USE ONLY | SEC USE ONLY |
| &nbsp;&nbsp;&nbsp;4. | Citizenship or Place of Organization<br> Delaware | Citizenship or Place of Organization<br> Delaware | Citizenship or Place of Organization<br> Delaware |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 5. | Sole Voting Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 6. | Shared Voting Power<br> 1,171,436<sup>2</sup> |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 7. | Sole Dispositive Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 8. | Shared Dispositive Power<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ |
| &nbsp;&nbsp;&nbsp;11. | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> |
| &nbsp;&nbsp;&nbsp;12. | Type of Reporting Person (See Instructions)<br> OO | Type of Reporting Person (See Instructions)<br> OO | Type of Reporting Person (See Instructions)<br> OO |

---

---

| | |
|:---|:---|
| 1 | Venrock Healthcare Capital Partners II, L.P., VHCP Co-Investment Holdings II, LLC, Venrock Healthcare Capital Partners III, L.P., VHCP Co-Investment Holdings III, LLC, Venrock Healthcare Capital Partners EG, L.P., VHCP Management II, LLC, VHCP Management III, LLC, VHCP Management EG, LLC, Nimish Shah and Bong Koh are members of a group for the purposes of this Schedule 13G/A. |

---

---

| | |
|:---|:---|
| 2 | Consists of (i) 192,869 shares held by Venrock Healthcare Capital Partners II, L.P., (ii) 78,203 shares held by VHCP Co-Investment Holdings II, LLC, (iii) 395,011 shares held by Venrock Healthcare Capital Partners III, L.P., (iv) 39,525 shares held by VHCP Co-Investment Holdings III, LLC and (v) 465,828 shares held by Venrock Healthcare Capital Partners EG, L.P. |

---

---

| | |
|:---|:---|
| 3 | This percentage is calculated based upon 29,009,382 shares of the Issuer's Common Stock outstanding as of November 8, 2022, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 14, 2022. |

---

---

| | |
|:---|:---|
| **CUSIP No. 002120202** | Page 10 of 17 |

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---

| | | | |
|:---|:---|:---|:---|
| &nbsp;&nbsp;&nbsp;1. | Name of Reporting Persons<br> Shah, Nimish | Name of Reporting Persons<br> Shah, Nimish | Name of Reporting Persons<br> Shah, Nimish |
| &nbsp;&nbsp;&nbsp;2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ |
| &nbsp;&nbsp;&nbsp;3. | SEC USE ONLY | SEC USE ONLY | SEC USE ONLY |
| &nbsp;&nbsp;&nbsp;4. | Citizenship or Place of Organization<br> United States | Citizenship or Place of Organization<br> United States | Citizenship or Place of Organization<br> United States |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 5. | Sole Voting Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 6. | Shared Voting Power<br> 1,171,436<sup>2</sup> |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 7. | Sole Dispositive Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 8. | Shared Dispositive Power<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ |
| &nbsp;&nbsp;&nbsp;11. | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> |
| &nbsp;&nbsp;&nbsp;12. | Type of Reporting Person (See Instructions)<br> IN | Type of Reporting Person (See Instructions)<br> IN | Type of Reporting Person (See Instructions)<br> IN |

---

---

| | |
|:---|:---|
| 1 | Venrock Healthcare Capital Partners II, L.P., VHCP Co-Investment Holdings II, LLC, Venrock Healthcare Capital Partners III, L.P., VHCP Co-Investment Holdings III, LLC, Venrock Healthcare Capital Partners EG, L.P., VHCP Management II, LLC, VHCP Management III, LLC, VHCP Management EG, LLC, Nimish Shah and Bong Koh are members of a group for the purposes of this Schedule 13G/A. |

---

---

| | |
|:---|:---|
| 2 | Consists of (i) 192,869 shares held by Venrock Healthcare Capital Partners II, L.P., (ii) 78,203 shares held by VHCP Co-Investment Holdings II, LLC, (iii) 395,011 shares held by Venrock Healthcare Capital Partners III, L.P., (iv) 39,525 shares held by VHCP Co-Investment Holdings III, LLC and (v) 465,828 shares held by Venrock Healthcare Capital Partners EG, L.P. |

---

---

| | |
|:---|:---|
| 3 | This percentage is calculated based upon 29,009,382 shares of the Issuer's Common Stock outstanding as of November 8, 2022, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 14, 2022. |

---

---

| | |
|:---|:---|
| **CUSIP No. 002120202** | Page 11 of 17 |

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| | | | |
|:---|:---|:---|:---|
| &nbsp;&nbsp;&nbsp;1. | Name of Reporting Persons<br> Koh, Bong | Name of Reporting Persons<br> Koh, Bong | Name of Reporting Persons<br> Koh, Bong |
| &nbsp;&nbsp;&nbsp;2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ | Check the Appropriate Box if a Member of a Group (See Instructions)<br> (a) ⌧<sup>1</sup> (b) ◻ |
| &nbsp;&nbsp;&nbsp;3. | SEC USE ONLY | SEC USE ONLY | SEC USE ONLY |
| &nbsp;&nbsp;&nbsp;4. | Citizenship or Place of Organization<br> United States | Citizenship or Place of Organization<br> United States | Citizenship or Place of Organization<br> United States |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 5. | Sole Voting Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 6. | Shared Voting Power<br> 1,171,436<sup>2</sup> |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 7. | Sole Dispositive Power<br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 8. | Shared Dispositive Power<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,171,436<sup>2</sup> |
| &nbsp;&nbsp;&nbsp;10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ |
| &nbsp;&nbsp;&nbsp;11. | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> | Percent of Class Represented by Amount in Row (9)<br> 4.0%<sup>3</sup> |
| &nbsp;&nbsp;&nbsp;12. | Type of Reporting Person (See Instructions)<br> IN | Type of Reporting Person (See Instructions)<br> IN | Type of Reporting Person (See Instructions)<br> IN |

---

---

| | |
|:---|:---|
| 1 | Venrock Healthcare Capital Partners II, L.P., VHCP Co-Investment Holdings II, LLC, Venrock Healthcare Capital Partners III, L.P., VHCP Co-Investment Holdings III, LLC, Venrock Healthcare Capital Partners EG, L.P., VHCP Management II, LLC, VHCP Management III, LLC, VHCP Management EG, LLC, Nimish Shah and Bong Koh are members of a group for the purposes of this Schedule 13G/A. |

---

---

| | |
|:---|:---|
| 2 | Consists of (i) 192,869 shares held by Venrock Healthcare Capital Partners II, L.P., (ii) 78,203 shares held by VHCP Co-Investment Holdings II, LLC, (iii) 395,011 shares held by Venrock Healthcare Capital Partners III, L.P., (iv) 39,525 shares held by VHCP Co-Investment Holdings III, LLC and (v) 465,828 shares held by Venrock Healthcare Capital Partners EG, L.P. |

---

---

| | |
|:---|:---|
| 3 | This percentage is calculated based upon 29,009,382 shares of the Issuer's Common Stock outstanding as of November 8, 2022, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 14, 2022. |

---

---

| | |
|:---|:---|
| **CUSIP No. 002120202** | Page 12 of 17 |

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Introductory Note: This Schedule 13G/A is filed on behalf of Venrock Healthcare Capital Partners II, L.P., a limited partnership organized under the laws of the State of Delaware ("VHCP II LP"), VHCP Co-Investment Holdings II, LLC, a limited liability company organized under the laws of the State of Delaware ("VHCP Co-Investment II"), Venrock Healthcare Capital Partners III, L.P., a limited partnership organized under the laws of the State of Delaware ("VHCP III LP"), VHCP Co-Investment Holdings III, LLC, a limited liability company organized under the laws of the State of Delaware ("VHCP Co-Investment III"), Venrock Healthcare Capital Partners EG, L.P., a limited partnership organized under the laws of the State of Delaware ("VHCP EG"), VHCP Management II, LLC, a limited liability company organized under the laws of the State of Delaware ("VHCP Management II"), VHCP Management III, LLC, a limited liability company organized under the laws of the State of Delaware ("VHCP Management III"), VHCP Management EG, LLC, a limited liability company organized under the laws of the State of Delaware ("VHCP Management EG" and collectively with VHCP II LP, VHCP Co-Investment II, VHCP III LP, VHCP Co-Investment III, VHCP EG, VHCP Management II and VHCP Management III, the "Venrock Entities"), Nimish Shah ("Shah") and Bong Koh ("Koh") in respect of Common Stock of aTyr Pharma, Inc.

**Item 1.**

(a) Name of Issuer

aTyr Pharma, Inc.

(b) Address of Issuer's Principal Executive Offices

3545 John Hopkins Court, Suite #250

San Diego, CA 92121

**Item 2.**

(a) Name of Person Filing

Venrock Healthcare Capital Partners II, L.P.

VHCP Co-Investment Holdings II, LLC

Venrock Healthcare Capital Partners III, L.P.

VHCP Co-Investment Holdings III, LLC

Venrock Healthcare Capital Partners EG, L.P.

VHCP Management II, LLC

VHCP Management III, LLC

VHCP Management EG, LLC

Nimish Shah

Bong Koh

(b) Address of Principal Business Office or, if none, Residence

---

| | |
|:---|:---|
| New York Office: | Palo Alto Office: |
| 7 Bryant Park | 3340 Hillview Avenue |
| 23rd Floor | Palo Alto, CA 94304 |
| New York, NY 10018 |  |

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(c) Citizenship

All of the Venrock Entities were organized in Delaware. The individuals are both United States citizens.

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| | |
|:---|:---|
| **CUSIP No. 002120202** | Page 13 of 17 |

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(d) Title of Class of Securities

Common Stock, par value $0.001 per share

(e) CUSIP Number

002120202

**Item 3.** **If this statement is filed pursuant to §§240.13d-1(b), or 240.13d-2(b) or (c), check whether the person filing is a:**

Not applicable

**Item 4.** **Ownership**

(a) Amount Beneficially Owned as of December 31, 2022:

---

| | | |
|:---|:---|:---|
| Venrock Healthcare Capital Partners II, L.P. | 1171436 | (1) |
| VHCP Co-Investment Holdings II, LLC | 1171436 | (1) |
| Venrock Healthcare Capital Partners III, L.P. | 1171436 | (1) |
| VHCP Co-Investment Holdings III, LLC | 1171436 | (1) |
| Venrock Healthcare Capital Partners EG, L.P. | 1171436 | (1) |
| VHCP Management II, LLC | 1171436 | (1) |
| VHCP Management III, LLC | 1171436 | (1) |
| VHCP Management EG, LLC | 1171436 | (1) |
| Nimish Shah | 1171436 | (1) |
| Bong Koh | 1171436 | (1) |

---

(b) Percent of Class as of December 31, 2022:

---

| | |
|:---|:---|
| Venrock Healthcare Capital Partners II, L.P. | 4.0% |
| VHCP Co-Investment Holdings II, LLC | 4.0% |
| Venrock Healthcare Capital Partners III, L.P. | 4.0% |
| VHCP Co-Investment Holdings III, LLC | 4.0% |
| Venrock Healthcare Capital Partners EG, L.P. | 4.0% |
| VHCP Management II, LLC | 4.0% |
| VHCP Management III, LLC | 4.0% |
| VHCP Management EG, LLC | 4.0% |
| Nimish Shah | 4.0% |
| Bong Koh | 4.0% |

---

(c) Number of shares as to which the person has, as of December 31, 2022:

(i) Sole power to vote or to direct the vote

---

| | |
|:---|:---|
| Venrock Healthcare Capital Partners II, L.P. | 0 |
| VHCP Co-Investment Holdings II, LLC | 0 |
| Venrock Healthcare Capital Partners III, L.P. | 0 |
| VHCP Co-Investment Holdings III, LLC | 0 |
| Venrock Healthcare Capital Partners EG, L.P. | 0 |
| VHCP Management II, LLC | 0 |
| VHCP Management III, LLC | 0 |
| VHCP Management EG, LLC | 0 |
| Nimish Shah | 0 |
| Bong Koh | 0 |

---

---

| | |
|:---|:---|
| **CUSIP No. 002120202** | Page 14 of 17 |

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(ii) Shared power to vote or to direct the vote

---

| | | |
|:---|:---|:---|
| Venrock Healthcare Capital Partners II, L.P. | 1171436 | (1) |
| VHCP Co-Investment Holdings II, LLC | 1171436 | (1) |
| Venrock Healthcare Capital Partners III, L.P. | 1171436 | (1) |
| VHCP Co-Investment Holdings III, LLC | 1171436 | (1) |
| Venrock Healthcare Capital Partners EG, L.P. | 1171436 | (1) |
| VHCP Management II, LLC | 1171436 | (1) |
| VHCP Management III, LLC | 1171436 | (1) |
| VHCP Management EG, LLC | 1171436 | (1) |
| Nimish Shah | 1171436 | (1) |
| Bong Koh | 1171436 | (1) |

---

(iii) Sole power to dispose or to direct the disposition of

---

| | |
|:---|:---|
| Venrock Healthcare Capital Partners II, L.P. | 0 |
| VHCP Co-Investment Holdings II, LLC | 0 |
| Venrock Healthcare Capital Partners III, L.P. | 0 |
| VHCP Co-Investment Holdings III, LLC | 0 |
| Venrock Healthcare Capital Partners EG, L.P. | 0 |
| VHCP Management II, LLC | 0 |
| VHCP Management III, LLC | 0 |
| VHCP Management EG, LLC | 0 |
| Nimish Shah | 0 |
| Bong Koh | 0 |

---

(iv) Shared power to dispose or to direct the disposition of

---

| | | |
|:---|:---|:---|
| Venrock Healthcare Capital Partners II, L.P. | 1171436 | (1) |
| VHCP Co-Investment Holdings II, LLC | 1171436 | (1) |
| Venrock Healthcare Capital Partners III, L.P. | 1171436 | (1) |
| VHCP Co-Investment Holdings III, LLC | 1171436 | (1) |
| Venrock Healthcare Capital Partners EG, L.P. | 1171436 | (1) |
| VHCP Management II, LLC | 1171436 | (1) |
| VHCP Management III, LLC | 1171436 | (1) |
| VHCP Management EG, LLC | 1171436 | (1) |
| Nimish Shah | 1171436 | (1) |
| Bong Koh | 1171436 | (1) |

---

(1) Consists of (i) 192,869 shares held by Venrock Healthcare Capital Partners II, L.P., (ii) 78,203 shares held by VHCP Co-Investment Holdings II, LLC, (iii) 395,011 shares held by Venrock Healthcare Capital Partners III, L.P., (iv) 39,525 shares held by VHCP Co-Investment Holdings III, LLC and (v) 465,828 shares held by Venrock Healthcare Capital Partners EG, L.P. VHCP Management II, LLC is the general partner of Venrock Healthcare Capital Partners II, L.P. and the manager of VHCP Co-Investment Holdings II, LLC. VHCP Management III, LLC is the general partner of Venrock Healthcare Capital Partners III, L.P. and the manager of VHCP Co-Investment Holdings III, LLC. VHCP Management EG, LLC is the general partner of Venrock Healthcare Capital Partners EG, L.P. Messrs. Shah and Koh are the voting members of VHCP Management II, LLC, VHCP Management III, LLC and VHCP Management EG, LLC.

---

| | |
|:---|:---|
| **CUSIP No. 002120202** | Page 15 of 17 |

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

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**

Not Applicable

**Item 7.** **Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person.**

Not Applicable

**Item 8.** **Identification and Classification of Members of the Group**

Not Applicable

**Item 9.** **Notice of Dissolution of a Group**

Not Applicable

**Item 10.** **Certification**

By signing below I certify that, to the best of my 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.

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| | |
|:---|:---|
| **CUSIP No. 002120202** | Page 16 of 17 |

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**<u>SIGNATURE</u>**

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.

Dated: February 14, 2023

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
| **Venrock Healthcare Capital Partners II, L.P.** | **Venrock Healthcare Capital Partners II, L.P.** | **Venrock Healthcare Capital Partners II, L.P.** | **Venrock Healthcare Capital Partners III, L.P.** | **Venrock Healthcare Capital Partners III, L.P.** | **Venrock Healthcare Capital Partners III, L.P.** |
| By: | VHCP Management II, LLC | VHCP Management II, LLC | By: | VHCP Management III, LLC | VHCP Management III, LLC |
| Its: | General Partner | General Partner | Its: | General Partner | General Partner |
| By: | /s/ David L. Stepp | /s/ David L. Stepp | By: | /s/ David L. Stepp | /s/ David L. Stepp |
|  | Name: | David L. Stepp |  | Name: | David L. Stepp |
|  | Its: | Authorized Signatory |  | Its: | Authorized Signatory |
| **VHCP Co-Investment Holdings II, LLC** | **VHCP Co-Investment Holdings II, LLC** | **VHCP Co-Investment Holdings II, LLC** | **VHCP Co-Investment Holdings III, LLC** | **VHCP Co-Investment Holdings III, LLC** | **VHCP Co-Investment Holdings III, LLC** |
| By: | VHCP Management II, LLC | VHCP Management II, LLC | By: | VHCP Management III, LLC | VHCP Management III, LLC |
| Its: | Manager | Manager | Its: | Manager | Manager |
| By: | /s/ David L. Stepp | /s/ David L. Stepp | By: | /s/ David L. Stepp | /s/ David L. Stepp |
|  | Name: | David L. Stepp |  | Name: | David L. Stepp |
|  | Its: | Authorized Signatory |  | Its: | Authorized Signatory |
| **VHCP Management II, LLC** | **VHCP Management II, LLC** | **VHCP Management II, LLC** | **VHCP Management III, LLC** | **VHCP Management III, LLC** | **VHCP Management III, LLC** |
| By: | /s/ David L. Stepp | /s/ David L. Stepp | By: | /s/ David L. Stepp | /s/ David L. Stepp |
|  | Name: | David L. Stepp |  | Name: | David L. Stepp |
|  | Its: | Authorized Signatory |  | Its: | Authorized Signatory |
| **Venrock Healthcare Capital Partners EG, L.P.** | **Venrock Healthcare Capital Partners EG, L.P.** | **Venrock Healthcare Capital Partners EG, L.P.** | **VHCP Management EG, LLC** | **VHCP Management EG, LLC** | **VHCP Management EG, LLC** |
| By: | VHCP Management EG, LLC | VHCP Management EG, LLC | /s/ David L. Stepp | /s/ David L. Stepp | /s/ David L. Stepp |
| Its: | General Partner | General Partner | Name: | &nbsp;&nbsp;&nbsp;&nbsp;David L. Stepp | &nbsp;&nbsp;&nbsp;&nbsp;David L. Stepp |
|  |  |  | Its: | &nbsp;&nbsp;&nbsp;&nbsp;Authorized Signatory | &nbsp;&nbsp;&nbsp;&nbsp;Authorized Signatory |
| /s/ David L. Stepp | /s/ David L. Stepp | /s/ David L. Stepp |  |  |  |
| Name: | &nbsp;&nbsp;&nbsp;&nbsp;David L. Stepp | &nbsp;&nbsp;&nbsp;&nbsp;David L. Stepp |  |  |  |
| Its: | &nbsp;&nbsp;&nbsp;&nbsp;Authorized Signatory | &nbsp;&nbsp;&nbsp;&nbsp;Authorized Signatory |  |  |  |

---

---

| |
|:---|
| **Bong Koh** |
| /s/ David L. Stepp |
| David L. Stepp, Attorney-in-fact |
| **Nimish Shah** |
| /s/ David L. Stepp |
| David L. Stepp, Attorney-in-fact |

---

---

| | |
|:---|:---|
| **CUSIP No. 002120202** | Page 17 of 17 |

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**EXHIBITS**

A: Joint Filing Agreement (incorporated by reference to Exhibit A to Schedule 13G filed September 27, 2021)

B: Power of Attorney for Nimish Shah (incorporated by reference to Exhibit B to Schedule 13G filed September 27, 2021)

C: Power of Attorney for Bong Koh (incorporated by reference to Exhibit C to Schedule 13G filed September 27, 2021)