# EDGAR Filing Document

**Accession Number:** 0001622229
**File Stem:** 0001193125-26-267566
**Filing Date:** 2026-6
**Character Count:** 5942
**Document Hash:** 941c082a0f65fa3e67c72ccbf1326af9
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-267566.hdr.sgml**: 20260611

**ACCESSION NUMBER**: 0001193125-26-267566

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 11

**CONFORMED PERIOD OF REPORT**: 20260609

**ITEM INFORMATION**: Submission of Matters to a Vote of Security Holders

**FILED AS OF DATE**: 20260611

**DATE AS OF CHANGE**: 20260611

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Cogent Biosciences, Inc.
- **CENTRAL INDEX KEY:** 0001622229
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 465308248
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-38443
- **FILM NUMBER:** 261083203

**BUSINESS ADDRESS:**
- **STREET 1:** 180 THIRD AVENUE
- **STREET 2:** 4TH FLOOR
- **CITY:** WALTHAM
- **STATE:** MA
- **BUSINESS PHONE:** 617-945-5576

**MAIL ADDRESS:**
- **STREET 1:** 180 THIRD AVENUE
- **STREET 2:** 4TH FLOOR
- **CITY:** WALTHAM
- **STATE:** MA

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Unum Therapeutics Inc.
- **DATE OF NAME CHANGE:** 20180402

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Unum Therapeutics, Inc.
- **DATE OF NAME CHANGE:** 20141014

?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): June 9, 2026

## COGENT BIOSCIENCES, INC.

#### (Exact name of registrant as specified in its charter)

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-38443** | **46-5308248** |
| **(State or other jurisdiction**<br> **of incorporation)** | **(Commission**<br> **File Number)** | **(I.R.S. Employer**<br> **Identification No.)** |

---

---

| | |
|:---|:---|
| **180 Third Avenue, 4th Floor**<br> **Waltham, Massachusetts** | **02451** |
| **(Address of principal executive offices)** | **(Zip Code)** |

---

#### Registrant's telephone number, including area code: (617) 945-5576

#### 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:

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading<br>Symbol(s)** | **Name of each exchange<br>on which registered** |
| Common stock, $0.001 Par Value | COGT | The Nasdaq Global Select Market |

---

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

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. ☐

------

On Tuesday, June 9, 2026, Cogent Biosciences, Inc., a Delaware corporation (the "Company"), held its 2026 Annual Meeting of Stockholders (the "Annual Meeting") at 9:00 a.m., Eastern Time. As of the close of business on April 13, 2026, the record date for the Annual Meeting, there were 170,801,004 shares of common stock, par value 0.001 per share (the "Common Stock"), entitled to vote at the meeting.

#### Item 5.07. Submission of Matters to a Vote of Security Holders.
At the Annual Meeting, each of the Company's director nominees was elected and each of the other proposals voted on were approved. The final voting results are set forth below.

---

| | | | |
|:---|:---|:---|:---|
|  | **Votes<br>For** | **Votes<br>Withheld** | **Broker<br>Non-Votes** |
|  **Proposal 1. Election of Directors** |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • Chris Cain, Ph.D.<br>| 124356809 | 18837092 | 11240612 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • Arlene Morris<br>| 120180517 | 23013384 | 11240612 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • Todd Shegog<br>| 124143441 | 19050460 | 11240612 |

---

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
|  | **Votes<br>For** | **Votes<br>For** | **Votes<br>Against** | **Votes<br>Against** | **Abstentions** | **Abstentions** | **Broker Non-Votes** | **Broker Non-Votes** |
| **Proposal 2. Ratification of PricewaterhouseCoopers LLP as Independent Registered Public Accounting Firm** |  | 154001553 |  | 399367 |  | 33593 |  | 0 |

---

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
|  | **Votes<br>For** | **Votes<br>For** | **Votes<br>Against** | **Votes<br>Against** | **Abstentions** | **Abstentions** | **Broker Non-Votes** | **Broker Non-Votes** |
| **Proposal 3. Advisory Vote on Executive Compensation** |  | 129183846 |  | 13977449 |  | 32606 |  | 11240612 |

---

------

#### SIGNATURES
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.

---

| | | |
|:---|:---|:---|
| Date: June 11, 2026 | **COGENT BIOSCIENCES, INC.** | **COGENT BIOSCIENCES, INC.** |
|  | By: | /s/ Evan Kearns |
|  |  | Evan Kearns |
|  |  | Chief Legal Officer and Corporate Secretary |

---