# EDGAR Filing Document

**Accession Number:** 0002012593
**File Stem:** 0001193125-25-198322
**Filing Date:** 2025-9
**Character Count:** 5207
**Document Hash:** eb2c53b875528d77fa03e2da77446c42
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-198322.hdr.sgml**: 20250908

**ACCESSION NUMBER**: 0001193125-25-198322

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20250908

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20250908

**DATE AS OF CHANGE**: 20250908

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Rapport Therapeutics, Inc.
- **CENTRAL INDEX KEY:** 0002012593
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 880724208
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42121
- **FILM NUMBER:** 251299990

**BUSINESS ADDRESS:**
- **STREET 1:** 99 HIGH STREET
- **STREET 2:** SUITE 2100
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110
- **BUSINESS PHONE:** 857-321-8020

**MAIL ADDRESS:**
- **STREET 1:** 99 HIGH STREET
- **STREET 2:** SUITE 2100
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110

?xml version='1.0' encoding='ASCII'? 8-K

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### WASHINGTON, D.C. 20549

### FORM 8-K

#### CURRENT REPORT

#### Pursuant to Section 13 or 15(d)

#### of the Securities Exchange Act of 1934

#### Date of Report (Date of earliest event reported): September 8, 2025

## Rapport Therapeutics, Inc.

#### (Exact name of Registrant as Specified in Its Charter)

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-42121** | **88-0724208** |
| **(State or Other Jurisdiction<br>of Incorporation)** | **(Commission**<br> **File Number)** | **(IRS Employer<br>Identification No.)** |

---

---

| | |
|:---|:---|
| **99 High Street** |  |
| **Suite 2100** |  |
| **Boston, Massachusetts** | **02210** |
| **(Address of Principal Executive Offices)** | **(Zip Code)** |

---

#### Registrant's Telephone Number, Including Area Code: (857) 321-8020

#### Not Applicable

#### (Former Name or Former Address, if Changed Since Last Report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

#### Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| **<br>Title of each class** | **Trading<br>Symbol(s)** | **Name of each exchange<br>on which registered** |
| Common Stock, $0.001 par value per share | RAPP | The Nasdaq Global Market |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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| | |
|:---|:---|
| **Item 8.01.** | **Other Events.**  |

---

Effective September 8, 2025, the Company terminated the sales agreement prospectus (the "ATM Prospectus") filed with the Company's registration statement on Form S-3 (File No. 333-288444) (the "Registration Statement") and related to the shares of the Company's common stock, par value $0.001 per share ("Common Stock"), issuable pursuant to the Sales Agreement, dated July 1, 2025, by and among the Company, Leerink Partners LLC and Cantor Fitzgerald & Co. (the "Sales Agreement"). As a result, the Company will not make any sales of Common Stock pursuant to the Sales Agreement, unless and until a new prospectus, prospectus supplement or a new registration statement is filed. Other than the termination of the ATM Prospectus, the Sales Agreement remains in full force and effect. As of September 8, 2025, the Company had not issued and sold any shares of Common Stock under the Sales Agreement.

A copy of the Sales Agreement was filed as Exhibit 1.2 to Registration Statement.

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| | |
|:---|:---|
| **Item 9.01.** | **Financial Statements and Exhibits.**  |

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(d) Exhibits

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| | |
|:---|:---|
| Exhibit<br> No. | Description |
| 104 | Cover Page Interactive Data File (embedded within Inline XBRL document) |

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#### SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | | |
|:---|:---|:---|
|  |  | Rapport Therapeutics, Inc. |
| Date: September 8, 2025 | By: | /s/ Troy Ignelzi |
|  |  | Troy Ignelzi <br>Chief Financial Officer |

---