Company: KNSL
Filing Date: 2025-05-22
Form Type: S-8
Source: 0001669162-25-000038
Chunk: 0

Company: Kinsale Capital Group, Inc.
Filing Date: 2025-05-22
Form: S-8
Chunk 0
---
<div align='center'>As filed with the Securities and Exchange Commission on May 22, 2025</div>

#### Registration No. 333-

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### FORM S-8

### REGISTRATION STATEMENT

#### UNDER THE SECURITIES ACT OF 1933

#### KINSALE CAPITAL GROUP, INC.
<div align='center'>(Exact name of registrant as specified in its charter)</div>

| Delaware                                                       |     | 98-0664337                          |
| (State or other jurisdiction of incorporation or organization) |     | -I.R.S. Employer Identification No. |
| 2035 Maywill Street                                            |     |                                     |
| Suite 100                                                      |     |                                     |
| Richmond, Virginia 23230                                       |     |                                     |
| (Address of Principal Executive Offices, including zip code)   |     |                                     |

<div align='center'>Kinsale Capital Group, Inc. 2025 Omnibus Incentive Plan

(Full title of the plan)</div>

#### Michael P. Kehoe

#### Chairman and Chief Executive Officer

#### Kinsale Capital Group, Inc.

#### 2035 Maywill Street

#### Suite 100

#### Richmond, Virginia 23230
<div align='center'>(Name and address of agent for service)

(804) 289-1300

(Telephone number, including area code, of agent for service)

Copy to:</div>

#### Dwight S. Yoo

#### Skadden, Arps, Slate, Meagher & Flom LLP

#### One Manhattan West

#### New York, NY 10001
<div align='center'>(212) 735-3000</div>

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

| Large accelerated filer |     | ☒ |     | Accelerated filer         |     | ☐ |
| Non-accelerated filer   |     | ☐ |     | Smaller reporting company |     | ☐ |
|                         |     |   |