# EDGAR Filing Document

**Accession Number:** 0001512762
**File Stem:** 0001104659-26-074090
**Filing Date:** 2026-6
**Character Count:** 8072
**Document Hash:** 43c60632e1ac05832df1dcd4d51c6f98
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-074090.hdr.sgml**: 20260615

**ACCESSION NUMBER**: 0001104659-26-074090

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20260612

**ITEM INFORMATION**: Changes in Registrant's Certifying Accountant

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260615

**DATE AS OF CHANGE**: 20260615

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Coherus Oncology, Inc.
- **CENTRAL INDEX KEY:** 0001512762
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 273615821
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-36721
- **FILM NUMBER:** 261091424

**BUSINESS ADDRESS:**
- **STREET 1:** C/O DENNIS M. LANFEAR
- **STREET 2:** 333 TWIN DOLPHIN DR, SUITE 600
- **CITY:** REDWOOD CITY
- **STATE:** CA
- **ZIP:** 94065
- **BUSINESS PHONE:** (650) 649-3530

**MAIL ADDRESS:**
- **STREET 1:** C/O DENNIS M. LANFEAR
- **STREET 2:** 333 TWIN DOLPHIN DR, SUITE 600
- **CITY:** REDWOOD CITY
- **STATE:** CA
- **ZIP:** 94065

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Coherus BioSciences, Inc.
- **DATE OF NAME CHANGE:** 20130114

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BioGenerics, Inc.
- **DATE OF NAME CHANGE:** 20110210

?xml version='1.0' encoding='ASCII'? COHERUS ONCOLOGY, INC._June 12, 2026

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**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 12, 2026**

## COHERUS ONCOLOGY, INC.
**(Exact name of registrant as specified in its charter)**

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| | | |
|:---|:---|:---|
| **Delaware** | **001-36721** | **27-3615821** |
| **(State or other jurisdiction**<br>**of incorporation)** | **(Commission**<br>**File Number)** | **(IRS Employer**<br>**Identification Number)** |

---

**333 Twin Dolphin Drive, Suite 600**

**Redwood City, CA 94065**

**(Address of principal executive offices, including Zip Code)**

**Registrant's telephone number, including area code: (650) 649-3530**

**N/A**

**(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:

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| | | |
|:---|:---|:---|
| **Title of each class** | **Trading**<br>**Symbol(s)** | **Name of each exchange**<br>**on which registered** |
| **Common Stock, $0.0001 par value per share** | **CHRS** | **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 4.01 Changes in Registrant's Certifying Accountant.**

*(a) Dismissal of Previous Independent Registered Public Accounting Firm*

On June 12, 2026, the Audit Committee (the "Audit Committee") of the Board of Directors of Coherus Oncology, Inc. (the "Company") dismissed Ernst & Young LLP ("EY") as the Company's independent registered public accounting firm, with dismissal effective as of such date.

The reports of EY on the consolidated financial statements of the Company as of and for the fiscal years ended December 31, 2025 and 2024 did not contain an adverse opinion or a disclaimer of opinion and were not qualified or modified as to uncertainty, audit scope, or accounting principles.

During the Company's fiscal years ended December 31, 2025 and 2024 and the subsequent interim period through June 12, 2026: (1) there were no "disagreements" (as defined in Item 304(a)(1)(iv) of Regulation S-K) with EY on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedure, which disagreements, if not resolved to the satisfaction of EY, would have caused EY to make reference to the subject matter of such disagreements in connection with its reports on the consolidated financial statements for such periods and (2) there were no "reportable events" (as defined in Item 304(a)(1)(v) of Regulation S-K), except that, as reported in the Company's Annual Report on Form 10-K for the year ended December 31, 2024, as filed with the Securities and Exchange Commission on March 17, 2025, the Company reported a material weakness in its internal control over financial reporting during such period related to documentation and review of certain inventory account reconciliations. As reported in the Company's Annual Report on Form 10-K for the year ended December 31, 2025, as filed with the Securities and Exchange Commission on March 9, 2026, management concluded that the material weakness had been remediated and its internal control over financial reporting was effective.

The Company provided EY with a copy of this Current Report on Form 8-K and requested that EY furnish the Company with a letter addressed to the Securities and Exchange Commission stating whether EY agrees with the statements made herein. A copy of the letter from EY is filed with this Current Report on Form 8-K as Exhibit 16.1.

*(b) Appointment of New Independent Registered Public Accounting Firm* 

On June 12, 2026, the Audit Committee of the Board of Directors of the Company selected PricewaterhouseCoopers LLP ("PwC") to be appointed to serve as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2026, subject to standard client acceptance procedures. During the fiscal years ended December 31, 2025 and 2024, and the subsequent interim period through June 12, 2026, the Company did not consult with PwC regarding any of the matters described in Items 304(a)(2)(i) and (ii) of Regulation S-K.

**Item 9.01 Financial Statements and Exhibits.**

(d) Exhibits

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| | |
|:---|:---|
| **Exhibit No.** | **Description** |
| 16.1 | [Letter from Ernst & Young LLP to the Securities and Exchange Commission dated June 15, 2026](chrs-20260612xex16d1.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |

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**SIGNATURES**

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

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| | | |
|:---|:---|:---|
| Date: June 15, 2026 | COHERUS ONCOLOGY, INC. | COHERUS ONCOLOGY, INC. |
|  | By: | /s/ Dennis M. Lanfear |
|  | Name: | Dennis M. Lanfear |
|  | Title: | Chief Executive Officer |

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## Exhibit 16.1

**Exhibit 16.1**

June 15, 2026

Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Commissioners:

We have read Item 4.01 of Form 8-K dated June 12, 2026, of Coherus Oncology, Inc. and are in agreement with the statements contained in the first, second, third and fourth paragraphs on page 1 therein. We have no basis to agree or disagree with other statements of the registrant contained therein.

/s/ Ernst & Young LLP

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