Company: KEY-PI
Filing Date: 2025-06-30
Form Type: 11-K
Source: 0000091576-25-000092
Chunk: 0

Company: KEYCORP /NEW/
Filing Date: 2025-06-30
Form: 11-K
Chunk 0
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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION
<div align='center'>Washington, D.C. 20549</div>

#### FORM 11-K
[X] ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

<div align='center'>For the fiscal year ended December 31, 2024

OR</div>

[ ] TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

<div align='center'>For the Transition Period From _______________To ______________</div>

#### Commission file number 001-11302

#### KeyCorp 401(k) Savings Plan
<div align='center'>(Full title of the plan)</div>

#### KeyCorp

#### 127 Public Square

#### Cleveland, Ohio 44114
<div align='center'>(Name of issuer of the securities held

pursuant to the plan and the address

of its principal executive office)</div>

REQUIRED INFORMATION

Item 4. Financial Statements and Supplemental Schedule for the Plan.

The KeyCorp 401(k) Savings Plan (“Plan”) is subject to the Employee Retirement Income Security Act of 1974 ("ERISA"). In lieu of the requirements of Items 1-3 of this form, the Plan is filing financial statements and a supplemental schedule prepared in accordance with the financial reporting requirements of ERISA. The Plan financial statements and supplemental schedule for the fiscal year ended December 31, 2024 are included as Exhibit 99.1 to this report on Form 11-K and are incorporated herein by reference. The Plan financial statements and schedule have been audited by Meaden & Moore, Ltd. Independent Registered Public Accounting Firm, and their report is included therein.

EXHIBITS

<div align='center'>SIGNATURES</div>

Pursuant to the requirements of the Securities Act of 1934, the trustees (or other persons who administer the employee benefit plan) have duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.

| Date: |     | June 30, 2025 |     | By: | /s/ Stacy L. Gilbert                                  |
|:------|:----|:--------------|:----|:----|:------------------------------------------------------|
|       |     |               |     |     | Stacy L. Gilbert, signing on behalf of                |
|       |     |