# EDGAR Filing Document

**Accession Number:** 0001923840
**File Stem:** 0001193125-25-177392
**Filing Date:** 2025-8
**Character Count:** 2855
**Document Hash:** cfdd01571dcecd79140b0f77b1d6d8ec
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-177392.hdr.sgml**: 20250811

**ACCESSION NUMBER**: 0001193125-25-177392

**CONFORMED SUBMISSION TYPE**: 15-12G

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250811

**DATE AS OF CHANGE**: 20250811

**EFFECTIVENESS DATE**: 20250811

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Third Harmonic Bio, Inc.
- **CENTRAL INDEX KEY:** 0001923840
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 834553503
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 15-12G
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41498
- **FILM NUMBER:** 251199982

**BUSINESS ADDRESS:**
- **STREET 1:** 1700 MONTGOMERY STREET
- **STREET 2:** SUITE 210
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94111
- **BUSINESS PHONE:** 2097272457

**MAIL ADDRESS:**
- **STREET 1:** 1700 MONTGOMERY STREET
- **STREET 2:** SUITE 210
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94111

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**FORM 15** 

**CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION** 

**UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934** 

**OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d)** 

**OF THE SECURITIES EXCHANGE ACT OF 1934.** 

**Commission File No. 001-41498**

## Third Harmonic Bio, Inc.
**(Exact name of registrant as specified in its charter)** 

**1700 Montgomery Street, Suite 210** 

**San Francisco, California 94111** 

**(209) 727-2457**

**(Address, including zip code, and telephone number, including area code, of registrant's principal executive offices)** 

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

**(Title of each class of securities covered by this Form)** 

**None** 

**(Titles of all other classes of securities for which a duty to file reports under Section 13(a) or 15(d) remains)** 

Please place an X in the box(es) to designate the appropriate rule provision(s) relied upon to terminate or suspend the duty to file reports:

---

| | |
|:---|:---|
|  Rule 12g-4(a)(1) | ☒ |
|  Rule 12g-4(a)(2) | ☐ |
|  Rule 12h-3(b)(1)(i) | ☒ |
|  Rule 12h-3(b)(1)(ii) | ☐ |
|  Rule 15d-6 | ☐ |
|  Rule 15d-22(b) | ☐ |

---

Approximate number of holders of record as of the certification or notice date: 6

Pursuant to the requirements of the Securities Exchange Act of 1934, Third Harmonic Bio, Inc. has caused this certification/notice to be signed on its behalf by the undersigned duly authorized person.

---

| | | |
|:---|:---|:---|
|  | **THIRD HARMONIC BIO, INC.** | **THIRD HARMONIC BIO, INC.** |
| Date: August 11, 2025 | By: | /s/ *Christopher Murphy* |
|  | Name: | Christopher Murphy |
|  | Title: | Chief Financial and Business Officer |

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