# EDGAR Filing Document

**Accession Number:** 0001864158
**File Stem:** 0001193125-23-032697
**Filing Date:** 2023-2
**Character Count:** 8609
**Document Hash:** 2747510aa2b2de1d0b0efe939b4bfce7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-23-032697.hdr.sgml**: 20230210

**ACCESSION NUMBER**: 0001193125-23-032697

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

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230210

**DATE AS OF CHANGE**: 20230210

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Janux Therapeutics, Inc.
- **CENTRAL INDEX KEY:** 0001817713
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **IRS NUMBER:** 822289112
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SC 13G/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-92596
- **FILM NUMBER:** 23612633

**BUSINESS ADDRESS:**
- **STREET 1:** 10955 VISTA SORRENTO PARKWAY
- **STREET 2:** SUITE 200
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92130
- **BUSINESS PHONE:** (858) 751-4493

**MAIL ADDRESS:**
- **STREET 1:** 10955 VISTA SORRENTO PARKWAY
- **STREET 2:** SUITE 200
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92130
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Campbell David Alan
- **CENTRAL INDEX KEY:** 0001864158

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

**MAIL ADDRESS:**
- **STREET 1:** C/O JANUX THERAPEUTICS, INC.
- **STREET 2:** 11099 N. TORREY PINES ROAD, SUITE 290
- **CITY:** LA JOLLA
- **STATE:** CA
- **ZIP:** 92037

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**SECURITIES AND EXCHANGE COMMISSION** 

**WASHINGTON, DC 20549** 

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**SCHEDULE 13G** 

**Under the Securities Exchange Act of 1934** 

**(Amendment No. 1)** 

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

**Common Stock** 

**(Title of Class of Securities)** 

**47103J 105** 

**(CUSIP Number)** 

**December 31, 2022** 

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

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Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

☐ Rule 13d-1(b)

☐ Rule 13d-1(c)

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;☒ 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. 47103J 105** | **13G** | **Page 2 of 4 Pages** |

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1. &nbsp;&nbsp;&nbsp;&nbsp; Names of Reporting Persons &nbsp;&nbsp;&nbsp;&nbsp; David Campbell, Ph.D.

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; Citizenship or Place of
Organization &nbsp;&nbsp;&nbsp;&nbsp; United
States

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 5. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Voting Power <br>&nbsp;&nbsp;&nbsp;&nbsp;2,379,935 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 6. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power <br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 7. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Dispositive Power <br>&nbsp;&nbsp;&nbsp;&nbsp;2,379,935 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power <br>&nbsp;&nbsp;&nbsp;&nbsp;0 |

---

9. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 2,379,935<sup>(1)</sup>

10. &nbsp;&nbsp;&nbsp;&nbsp; Check if the Aggregate
Amount in Row (9) Excludes Certain Shares (see instructions) &nbsp;&nbsp;&nbsp;&nbsp; ☐

11. &nbsp;&nbsp;&nbsp;&nbsp; Percent of
Class Represented by Amount in Row 9 &nbsp;&nbsp;&nbsp;&nbsp; 5.4%<sup>(2)</sup>

12. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting Person
(see instructions) &nbsp;&nbsp;&nbsp;&nbsp; IN

(1) Includes 2,047,881 shares of common stock issuable within 60 days of December 31, 2022 upon the exercise
of stock options held by the Reporting Person.

(2) The percentage is calculated based on 41,684,666 shares of Common Stock outstanding as of December 31,
2022. ------

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| | | |
|:---|:---|:---|
| **CUSIP No. 47103J 105** | **13G** | **Page 3 of 4 Pages** |

---

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| | |
|:---|:---|
| **Item 1(a).** | Name of Issuer:<br> **Janux Therapeutics, Inc., a Delaware corporation** |
| **Item 1(b).** | Address of Issuer's Principal Executive Offices:<br> **10955 Vista Sorrento Parkway, Suite 200**<br> **San Diego, CA 92130** |
| **Item 2(a).** | Name of Person Filing:<br> **David Campbell, Ph.D.** |
| **Item 2(b).** | Address of Principal Business Office or, if none, Residence:<br> **10955 Vista Sorrento Parkway, Suite 200**<br> **San Diego, CA 92130** |
| **Item 2(c).** | Citizenship:<br> **USA** |
| **Item 2(d).** | Title of Class of Securities:<br> **Common Stock** |
| **Item 2(e).** | CUSIP Number:<br> **47103J 10 5** |
| **Item 3.** | Not applicable |

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**(a)** Amount Beneficially Owned: **2,379,935 shares of Common Stock** 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**(b)** Percent of Class: **5.4%** 

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**(i)** Sole power to vote or to direct the vote: **2,379,935** 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**(ii)** Shared power to vote or to direct the vote: **0** 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**(iii)** Sole power to dispose or to direct the disposition of: **2,379,935** 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**(iv)** Shared power to dispose or to direct the disposition of: **0** 

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

Not applicable

**Item 6.** Ownership of More than Five Percent on Behalf of Another Person <br>

Not applicable

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

Not applicable

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| | |
|:---|:---|
| **Item 8**. | Identification and Classification of Members of the Group  |

---

Not applicable

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| | |
|:---|:---|
| **Item 9**. | Notice of Dissolution of a Group  |

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Not applicable

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| | |
|:---|:---|
| **Item 10**. | Certification  |

---

Not applicable

Page 3 of 4 pages

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| | | |
|:---|:---|:---|
| **CUSIP No. 47103J 105** | **13G** | **Page 4 of 4 Pages** |

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**SIGNATURE** 

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

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| |
|:---|
| February 9, 2023 |
| Date |
| /s/ David Campbell, Ph.D. |
| Signature |
| David Campbell, Ph.D. |
| Name/Title |

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The original statement shall be signed by each person on whose behalf the statement is filed or his authorized representative. If the statement is signed on behalf of a person by his authorized representative other than an executive officer or general partner of the filing person, evidence of the representative's authority to sign on behalf of such person shall be filed with the statement, provided, however, that a power of attorney for this purpose which is already on file with the Commission may be incorporated by reference. The name and any title of each person who signs the statement shall be typed or printed beneath his signature.

*Note:* Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. *See* Rule 13d-7 for other parties for whom copies are to be sent.

**Attention: Intentional misstatements or omissions of fact constitute Federal criminal violations (See 18 U.S.C. 1001)**