# EDGAR Filing Document

**Accession Number:** 0001628098
**File Stem:** 0001839882-23-003764
**Filing Date:** 2023-2
**Character Count:** 27365
**Document Hash:** db9f88923252f9346cbe96edb2ad7976
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001839882-23-003764.hdr.sgml**: 20230214

**ACCESSION NUMBER**: 0001839882-23-003764

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

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20230214

**DATE AS OF CHANGE**: 20230214

**GROUP MEMBERS**: ATLAS VENTURE ASSOCIATES OPPORTUNITY I, L.P.

**GROUP MEMBERS**: ATLAS VENTURE ASSOCIATES OPPORTUNITY I, LLC

**GROUP MEMBERS**: ATLAS VENTURE ASSOCIATES X, L.P.

**GROUP MEMBERS**: ATLAS VENTURE ASSOCIATES X, LLC

**GROUP MEMBERS**: ATLAS VENTURE OPPORTUNITY FUND I, L.P.

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Kymera Therapeutics, Inc.
- **CENTRAL INDEX KEY:** 0001815442
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **IRS NUMBER:** 812992166
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SC 13G/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-91636
- **FILM NUMBER:** 23630059

**BUSINESS ADDRESS:**
- **STREET 1:** 200 ARSENAL YARDS BLVD., SUITE 230
- **CITY:** WATERTOWN
- **STATE:** MA
- **ZIP:** 02472
- **BUSINESS PHONE:** 857-285-5314

**MAIL ADDRESS:**
- **STREET 1:** 200 ARSENAL YARDS BLVD., SUITE 230
- **CITY:** WATERTOWN
- **STATE:** MA
- **ZIP:** 02472
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Atlas Venture Fund X, L.P.
- **CENTRAL INDEX KEY:** 0001628098
- **IRS NUMBER:** 472435989
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

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

**BUSINESS ADDRESS:**
- **STREET 1:** 400 TECHNOLOGY SQUARE
- **STREET 2:** 10TH FLOOR
- **CITY:** CAMBRIDGE
- **STATE:** MA
- **ZIP:** 02139
- **BUSINESS PHONE:** 857-201-2700

**MAIL ADDRESS:**
- **STREET 1:** 400 TECHNOLOGY SQUARE
- **STREET 2:** 10TH FLOOR
- **CITY:** CAMBRIDGE
- **STATE:** MA
- **ZIP:** 02139

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**SCHEDULE 13G/A**

**Under the Securities Exchange Act of 1934**

(Amendment No. 2)\*

**Kymera Therapeutics, Inc.**

(Name of Issuer)

**COMMON STOCK, $0.0001 PAR VALUE**

(Title of Class of Securities)

**501575104**

(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 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).

CUSIP No. 501575104 Page 2 of 10 Pages

1. Name of Reporting Persons Atlas Venture Fund X, L.P.

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

3. SEC USE ONLY

4. Citizenship or Place of Organization Delaware

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | &nbsp;&nbsp;5. | &nbsp;&nbsp; Sole Voting Power<br> 0 |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 6. | Shared Voting Power<br> 5,066,925<sup>(1)</sup> |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 7. | Sole Dispositive Power<br> 0 |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 8. | Shared Dispositive Power<br> 5,066,925<sup>(1)</sup> |

---

9. Aggregate Amount Beneficially Owned by Each Reporting
 Person 5,066,925 <sup>(1)</sup>

10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ☐

11. Percent of Class Represented by Amount in Row (9) 9.2% <sup>(2)</sup>

12. Type of Reporting Person (See Instructions) PN

<sup>(1)</sup> As described in Item 4 below, Atlas Venture Fund X, L.P., a Delaware limited partnership ("Atlas X"), Atlas Venture Associates X, L.P., a Delaware limited partnership ("AVA X LP") and Atlas Venture Associates X, LLC, a Delaware limited liability company ("AVA X LLC" and together with Atlas X and AVA X LP, the "Fund X Reporting Persons") beneficially own 5,066,925 shares of the Issuer's Common Stock. All of these shares are directly held by Atlas X. AVA X LP is the general partner of Atlas X and AVA X LLC is the general partner of AVA X LP. Each of AVA X LP and AVA X LLC has voting and dispositive power over the shares held by Atlas X. As such, each of the Fund X Reporting Persons share voting and dispositive power with respect to the shares held by Atlas X.

<sup>(2)</sup> This percentage is calculated based upon 54,864,727 outstanding shares of Common Stock of the Issuer as of October 28, 2022, as reported in the Issuer's Form 10-Q for the quarter ending September 30, 2022 and filed with the Securities and Exchange Commission on November 3, 2022.

CUSIP No. 501575104 Page 3 of 10 Pages

1. Name of Reporting Persons Atlas Venture Associates X, L.P.

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

3. SEC USE ONLY

4. Citizenship or Place of Organization Delaware

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | &nbsp;&nbsp;5. | &nbsp;&nbsp; Sole Voting Power<br> 0 |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 6. | Shared Voting Power<br> 5,066,925<sup>(1)</sup> |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 7. | Sole Dispositive Power<br> 0 |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 8. | Shared Dispositive Power<br> 5,066,925<sup>(1)</sup> |

---

9. Aggregate Amount Beneficially Owned by Each Reporting
 Person 5,066,925 <sup>(1)</sup>

10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ☐

11. Percent of Class Represented by Amount in Row (9) 9.2% <sup>(2)</sup>

12. Type of Reporting Person (See Instructions) PN

<sup>(1)</sup> As described in Item 4 below, Atlas Venture Fund X, L.P., a Delaware limited partnership ("Atlas X"), Atlas Venture Associates X, L.P., a Delaware limited partnership ("AVA X LP") and Atlas Venture Associates X, LLC, a Delaware limited liability company ("AVA X LLC" and together with Atlas X and AVA X LP, the "Fund X Reporting Persons") beneficially own 5,066,925 shares of the Issuer's Common Stock. All of these shares are directly held by Atlas X. AVA X LP is the general partner of Atlas X and AVA X LLC is the general partner of AVA X LP. Each of AVA X LP and AVA X LLC has voting and dispositive power over the shares held by Atlas X. As such, each of the Fund X Reporting Persons share voting and dispositive power with respect to the shares held by Atlas X.

<sup>(2)</sup> This percentage is calculated based upon 54,864,727 outstanding shares of Common Stock of the Issuer as of October 28, 2022, as reported in the Issuer's Form 10-Q for the quarter ending September 30, 2022 and filed with the Securities and Exchange Commission on November 3, 2022.

CUSIP No. 501575104 Page 4 of 10 Pages

1. Name of Reporting Persons Atlas Venture Associates X, LLC

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

3. SEC USE ONLY

4. Citizenship or Place of Organization Delaware

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | &nbsp;&nbsp;5. | &nbsp;&nbsp; Sole Voting Power<br> 0 |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 6. | Shared Voting Power<br> 5,066,925<sup>(1)</sup> |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 7. | Sole Dispositive Power<br> 0 |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 8. | Shared Dispositive Power<br> 5,066,925<sup>(1)</sup> |

---

9. Aggregate Amount Beneficially Owned by Each Reporting
 Person 5,066,925 <sup>(1)</sup>

10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ☐

11. Percent of Class Represented by Amount in Row (9) 9.2% <sup>(2)</sup>

12. Type of Reporting Person (See Instructions) OO

<sup>(1)</sup> As described in Item 4 below, Atlas Venture Fund X, L.P., a Delaware limited partnership ("Atlas X"), Atlas Venture Associates X, L.P., a Delaware limited partnership ("AVA X LP") and Atlas Venture Associates X, LLC, a Delaware limited liability company ("AVA X LLC" and together with Atlas X and AVA X LP, the "Fund X Reporting Persons") beneficially own 5,066,925 shares of the Issuer's Common Stock. All of these shares are directly held by Atlas X. AVA X LP is the general partner of Atlas X and AVA X LLC is the general partner of AVA X LP. Each of AVA X LP and AVA X LLC has voting and dispositive power over the shares held by Atlas X. As such, each of the Fund X Reporting Persons share voting and dispositive power with respect to the shares held by Atlas X.

<sup>(2)</sup> This percentage is calculated based upon 54,864,727 outstanding shares of Common Stock of the Issuer as of October 28, 2022, as reported in the Issuer's Form 10-Q for the quarter ending September 30, 2022 and filed with the Securities and Exchange Commission on November 3, 2022.

CUSIP No. 501575104 Page 5 of 10 Pages

1. Name of Reporting Persons Atlas Venture Opportunity Fund I, L.P.

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

3. SEC USE ONLY

4. Citizenship or Place of Organization Delaware

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | &nbsp;&nbsp;5. | &nbsp;&nbsp; Sole Voting Power<br> 0 |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 6. | Shared Voting Power<br> 917,811<sup>(1)</sup> |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 7. | Sole Dispositive Power<br> 0 |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 8. | Shared Dispositive Power<br> 917,811<sup>(1)</sup> |

---

9. Aggregate Amount Beneficially Owned by Each Reporting
 Person 917,811 <sup>(1)</sup>

10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ☐

11. Percent of Class Represented by Amount in Row (9) 1.7% <sup>(2)</sup>

12. Type of Reporting Person (See Instructions) PN

<sup>(1)</sup> As described in Item 4 below, Atlas Venture Opportunity Fund I, L.P., a Delaware limited partnership ("AVO I"), Atlas Venture Associates Opportunity I, L.P., a Delaware limited partnership ("AVAO LP") and Atlas Venture Associates Opportunity I, LLC, a Delaware limited liability company ("AVAO LLC" and together with AVO I and AVAO LP, the "Opportunity Fund Reporting Persons") beneficially own 917,811 shares of the Issuer's Common Stock. All of these shares are directly held by AVO I. AVAO LP is the general partner of AVO I and AVAO LLC is the general partner of AVAO LP. Each of AVAO LP and AVAO LLC has voting and dispositive power over the shares held by AVO I. As such, each of the Opportunity Fund Reporting Persons share voting and dispositive power with respect to the shares held by AVO I.

<sup>(2)</sup> This percentage is calculated based upon 54,864,727 outstanding shares of Common Stock of the Issuer as of October 28, 2022, as reported in the Issuer's Form 10-Q for the quarter ending September 30, 2022 and filed with the Securities and Exchange Commission on November 3, 2022.

CUSIP No. 501575104 Page 6 of 10 Pages

1. Name of Reporting Persons Atlas Venture Associates Opportunity I, L.P.

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

3. SEC USE ONLY

4. Citizenship or Place of Organization Delaware

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | &nbsp;&nbsp;5. | &nbsp;&nbsp; Sole Voting Power<br> 0 |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 6. | Shared Voting Power<br> 917,811<sup>(1)</sup> |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 7. | Sole Dispositive Power<br> 0 |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 8. | Shared Dispositive Power<br> 917,811<sup>(1)</sup> |

---

9. Aggregate Amount Beneficially Owned by Each Reporting
 Person 917,811 <sup>(1)</sup>

10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ☐

11. Percent of Class Represented by Amount in Row (9) 1.7% <sup>(2)</sup>

12. Type of Reporting Person (See Instructions) PN

<sup>(1)</sup> As described in Item 4 below, Atlas Venture Opportunity Fund I, L.P., a Delaware limited partnership ("AVO I"), Atlas Venture Associates Opportunity I, L.P., a Delaware limited partnership ("AVAO LP") and Atlas Venture Associates Opportunity I, LLC, a Delaware limited liability company ("AVAO LLC" and together with AVO I and AVAO LP, the "Opportunity Fund Reporting Persons") beneficially own 917,811 shares of the Issuer's Common Stock. All of these shares are directly held by AVO I. AVAO LP is the general partner of AVO I and AVAO LLC is the general partner of AVAO LP. Each of AVAO LP and AVAO LLC has voting and dispositive power over the shares held by AVO I. As such, each of the Opportunity Fund Reporting Persons share voting and dispositive power with respect to the shares held by AVO I.

<sup>(2)</sup> This percentage is calculated based upon 54,864,727 outstanding shares of Common Stock of the Issuer as of October 28, 2022, as reported in the Issuer's Form 10-Q for the quarter ending September 30, 2022 and filed with the Securities and Exchange Commission on November 3, 2022.

CUSIP No. 501575104 Page 7 of 10 Pages

1. Name of Reporting Persons Atlas Venture Associates Opportunity I, LLC

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

3. SEC USE ONLY

4. Citizenship or Place of Organization Delaware

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | &nbsp;&nbsp;5. | &nbsp;&nbsp; Sole Voting Power<br> 0 |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 6. | Shared Voting Power<br> 917,811<sup>(1)</sup> |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 7. | Sole Dispositive Power<br> 0 |
| &nbsp;&nbsp; Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With: | 8. | Shared Dispositive Power<br> 917,811<sup>(1)</sup> |

---

9. Aggregate Amount Beneficially Owned by Each Reporting
 Person 917,811 <sup>(1)</sup>

10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ☐

11. Percent of Class Represented by Amount in Row (9) 1.7% <sup>(2)</sup>

12. Type of Reporting Person (See Instructions) OO

<sup>(1)</sup> As described in Item 4 below, Atlas Venture Opportunity Fund I, L.P., a Delaware limited partnership ("AVO I"), Atlas Venture Associates Opportunity I, L.P., a Delaware limited partnership ("AVAO LP") and Atlas Venture Associates Opportunity I, LLC, a Delaware limited liability company ("AVAO LLC" and together with AVO I and AVAO LP, the "Opportunity Fund Reporting Persons") beneficially own 917,811 shares of the Issuer's Common Stock. All of these shares are directly held by AVO I. AVAO LP is the general partner of AVO I and AVAO LLC is the general partner of AVAO LP. Each of AVAO LP and AVAO LLC has voting and dispositive power over the shares held by AVO I. As such, each of the Opportunity Fund Reporting Persons share voting and dispositive power with respect to the shares held by AVO I.

<sup>(2)</sup> This percentage is calculated based upon 54,864,727 outstanding shares of Common Stock of the Issuer as of October 28, 2022, as reported in the Issuer's Form 10-Q for the quarter ending September 30, 2022 and filed with the Securities and Exchange Commission on November 3, 2022.

CUSIP No. 501575104 Page 8 of 10 Pages

<u>Item 1(a)</u> <u>Name of Issuer</u>

Kymera Therapeutics, Inc. (the "Issuer")

<u>Item 1(b)</u> <u>Address of Issuer's Principal Executive Offices</u>

200 Arsenal Yards Blvd., Suite 230<br> Watertown, MA 02472

<u>Item 2(a)</u> <u>Name of Person Filing</u>

This Schedule 13G is filed by (i) Atlas Venture Fund X, L.P., a Delaware limited partnership ("Atlas X"), (ii) Atlas Venture Associates X, L.P., a Delaware limited partnership ("AVA X LP"), (iii) Atlas Venture Associates X, LLC, a Delaware limited liability company ("AVA X LLC" and together with Atlas X and AVA X LP, the "Fund X Reporting Persons"), (iv) Atlas Venture Opportunity Fund I, L.P., a Delaware limited partnership ("AVO I"), (v) Atlas Venture Associates Opportunity I, L.P., a Delaware limited partnership ("AVAO LP") and (vi) Atlas Venture Associates Opportunity I, LLC, a Delaware limited liability company ("AVAO LLC" and together with AVO I and AVAO LP, the "Opportunity Fund Reporting Persons" and together with the Fund X Reporting Persons, the "Reporting Persons").

<u>Item 2(b)</u> <u>Address of Principal Business Office or, if none, Residence</u>

300 Technology Square, 8th Floor<br> Cambridge, Massachusetts 02139

<u>Item 2(c)</u> <u>Citizenship</u>

Each of Atlas X, AVA X LP, AVO I and AVAO LP is a Delaware limited partnership. Each of AVA X LLC and AVAO LLC is a Delaware limited liability company.

<u>Item 2(d)</u> <u>Title of Class of Securities</u>

Common Stock, $0.0001 par value per share

 <u>Item 2(e)</u> <u>CUSIP Number</u>

501575104

<u>Item 3</u>

Not applicable.

 <u>Item 4</u> <u>Ownership</u>

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1

(a) Amount beneficially owned: Atlas X is the record owner of 5,066,925 shares of Common Stock. AVA X LP is the general partner of Atlas X and AVA X LLC is the general partner of AVA X LP. Each of Atlas X, AVA X LP and AVA X LLC has shared voting and dispositive power over the shares held by Atlas X. As such, each of Atlas X, AVA X LP and AVA X LLC may be deemed to beneficially own the shares held by Atlas X.

Amount beneficially owned: AVO I is the record owner of 917,811 shares of Common Stock. AVAO LP is the general partner of AVO I and AVAO LLC is the general partner of AVAO LP. Each of AVO I, AVAO LP and AVAO LLC has shared voting and dispositive power over the shares held by AVO I. As such, each of AVO I, AVAO LP and AVAO LLC may be deemed to beneficially own the shares held by AVO I.

(b) Percent of class: Fund X Reporting Persons and Opportunity Fund Reporting Persons may be deemed to beneficially own 9.2% and 1.7%, respectively, of the Issuer's outstanding Common Stock, which percentages are calculated based upon 54,864,727 outstanding shares of Common Stock of the Issuer as of October 28, 2022, as reported in the Issuer's Form 10-Q for the quarter ending September 30, 2022 and filed with the Securities and Exchange Commission on November 3, 2022.

CUSIP No. 501575104 Page 9 of 10 Pages

Collectively, the Reporting Persons beneficially own an aggregate of 5,984,736 shares of Common Stock, which represents 10.9% of the Issuer's outstanding Common Stock. The Fund X Reporting Persons and the Opportunity Fund Reporting Persons are under common control and as a result, the Reporting Persons may be deemed to be members of a group. However, the Reporting Persons disclaim such group membership, and this Schedule 13G shall not be deemed an admission that the Reporting Persons are members of a group for purposes of Section 13 or for any other purposes.

(c) Number of shares as to which the person has:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) Sole power to vote or to direct the vote: None of the Reporting Persons have the sole power to direct the vote of the Common Stock.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) Shared power to vote or to direct the vote: Each Fund X Reporting Person shares power to vote or direct the vote of 5,066,925 shares of Common Stock and each Opportunity Fund Reporting Person shares power to vote or direct the vote of 917,811 shares of Common Stock.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) Sole power to dispose or to direct the disposition of: None of the Reporting Persons have the sole power to dispose or to direct the disposition of the Common Stock.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iv) Shared power to dispose or to direct the disposition of: Each Fund X Reporting Person shares power to dispose or to direct the disposition of 5,066,925 shares of Common Stock and each Opportunity Fund Reporting Person shares power to dispose or to direct the disposition of 917,811 shares of Common Stock.

---

| | |
|:---|:---|
| <u>Item 5</u> | <u>Ownership of Five Percent or Less of a Class</u> |

---

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. ☐

---

| | |
|:---|:---|
| <u>Item 6</u> | <u>Ownership of More than Five Percent of Another Person</u> |

---

Not applicable.

<u>Item 7</u> <u>Identification and Classification of the Subsidiary which Acquired the Security Being Reported on by the Parent Holding Company</u>

Not applicable.

<u>Item 8</u> <u>Identification and Classification of Members of the Group</u>

Not applicable.

<u>Item 9</u> <u>Notice of Dissolution of Group</u>

Not applicable.

<u>Item 10</u> <u>Certification</u>

Not applicable.

CUSIP No. 501575104 Page 10 of 10 Pages

 **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.

Dated: February 14, 2023

---

| | |
|:---|:---|
| **ATLAS VENTURE FUND X, L.P.** | **ATLAS VENTURE FUND X, L.P.** |
| By: Atlas Venture Associates X, L.P., its general partner | By: Atlas Venture Associates X, L.P., its general partner |
| By: Atlas Venture Associates X, LLC, its general partner | By: Atlas Venture Associates X, LLC, its general partner |
| By: | /s/ Ommer Chohan |
| Name: | Ommer Chohan |
| Title: | CFO |
| **ATLAS VENTURE ASSOCIATES X, L.P.** | **ATLAS VENTURE ASSOCIATES X, L.P.** |
| By: Atlas Venture Associates X, LLC, its general partner | By: Atlas Venture Associates X, LLC, its general partner |
| By: | /s/ Ommer Chohan |
| Name: | Ommer Chohan |
| Title: | CFO |
| **ATLAS VENTURE ASSOCIATES X, LLC** | **ATLAS VENTURE ASSOCIATES X, LLC** |
| By: | /s/ Ommer Chohan |
| Name: | Ommer Chohan |
| Title: | CFO |
| **ATLAS VENTURE OPPORTUNITY FUND I, L.P.** | **ATLAS VENTURE OPPORTUNITY FUND I, L.P.** |
| By: Atlas Venture Associates Opportunity I, L.P., its general partner | By: Atlas Venture Associates Opportunity I, L.P., its general partner |
| By: Atlas Venture Associates Opportunity I, LLC, its general partner | By: Atlas Venture Associates Opportunity I, LLC, its general partner |
| By: | /s/ Ommer Chohan |
| Name: | Ommer Chohan |
| Title: | CFO |
| **ATLAS VENTURE ASSOCIATES OPPORTUNITY I, L.P.** | **ATLAS VENTURE ASSOCIATES OPPORTUNITY I, L.P.** |
| By: Atlas Venture Associates Opportunity I, LLC, its general partner | By: Atlas Venture Associates Opportunity I, LLC, its general partner |
| By: | /s/ Ommer Chohan |
| Name: | Ommer Chohan |
| Title: | CFO |

---

---

| | |
|:---|:---|
| **ATLAS VENTURE ASSOCIATES OPPORTUNITY I, LLC** | **ATLAS VENTURE ASSOCIATES OPPORTUNITY I, LLC** |
| By: | /s/ Ommer Chohan |
| Name: | Ommer Chohan |
| Title: | CFO |

---

**EXHIBITS**

<br> A: [Joint Filing Agreement](ex-1.htm)

## Ex-1

[Atlas Venture Fund X, L.P. SC 13G/A](kymr-sc13ga_021323.htm)

**Exhibit A**

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the undersigned agree to the joint filing on behalf of each of them of a statement on Schedule 13G (including amendments thereto) with respect to the Common Stock of Kymera Therapeutics, Inc. and further agree that this agreement be included as an exhibit to such filing. Each party to the agreement expressly authorizes each other party to file on its behalf any and all amendments to such statement. Each party to this agreement agrees that this joint filing agreement may be signed in counterparts.

IN WITNESS WHEREOF, the undersigned have executed this Joint Filing Agreement as of February 14, 2023.

---

| | |
|:---|:---|
| **ATLAS VENTURE FUND X, L.P.** | **ATLAS VENTURE FUND X, L.P.** |
| By: Atlas Venture Associates X, L.P., its general partner | By: Atlas Venture Associates X, L.P., its general partner |
| By: Atlas Venture Associates X, LLC, its general partner | By: Atlas Venture Associates X, LLC, its general partner |
| By: | /s/ Ommer Chohan |
| Name: | Ommer Chohan |
| Title: | CFO |
| **ATLAS VENTURE ASSOCIATES X, L.P.** | **ATLAS VENTURE ASSOCIATES X, L.P.** |
| By: Atlas Venture Associates X, LLC, its general partner | By: Atlas Venture Associates X, LLC, its general partner |
| By: | /s/ Ommer Chohan |
| Name: | Ommer Chohan |
| Title: | CFO |
| **ATLAS VENTURE ASSOCIATES X, LLC** | **ATLAS VENTURE ASSOCIATES X, LLC** |
| By: | /s/ Ommer Chohan |
| Name: | Ommer Chohan |
| Title: | CFO |
| **ATLAS VENTURE OPPORTUNITY FUND I, L.P.** | **ATLAS VENTURE OPPORTUNITY FUND I, L.P.** |
| By: Atlas Venture Associates Opportunity I, L.P., its general partner | By: Atlas Venture Associates Opportunity I, L.P., its general partner |
| By: Atlas Venture Associates Opportunity I, LLC, its general partner | By: Atlas Venture Associates Opportunity I, LLC, its general partner |
| By: | /s/ Ommer Chohan |
| Name: | Ommer Chohan |
| Title: | CFO |
| **ATLAS VENTURE ASSOCIATES OPPORTUNITY I, L.P.** | **ATLAS VENTURE ASSOCIATES OPPORTUNITY I, L.P.** |
| By: Atlas Venture Associates Opportunity I, LLC, its general partner | By: Atlas Venture Associates Opportunity I, LLC, its general partner |
| By: | /s/ Ommer Chohan |
| Name: | Ommer Chohan |
| Title: | CFO |
| **ATLAS VENTURE ASSOCIATES OPPORTUNITY I, LLC** | **ATLAS VENTURE ASSOCIATES OPPORTUNITY I, LLC** |
| By: | /s/ Ommer Chohan |
| Name: | Ommer Chohan |
| Title: | CFO |

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