Company: KNSL
Filing Date: 2025-08-27
Form Type: S-3ASR
Source: 0001669162-25-000052
Chunk: 0

Company: Kinsale Capital Group, Inc.
Filing Date: 2025-08-27
Form: S-3ASR
Chunk 0
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<div align='center'>As filed with the Securities and Exchange Commission on August 27, 2025</div>

#### Registration No. 333-

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549
<div align='center'>_____________________________</div>

#### FORM S-3

### REGISTRATION STATEMENT UNDER

#### THE SECURITIES ACT OF 1933
<div align='center'>_____________________________</div>

#### 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 Number |

| 2035 Maywill Street 
 Suite 100           
 Richmond, VA 23230  |
| (804) 289-1300      |

<div align='center'>(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

_____________________________</div>

#### Michael P. Kehoe

#### Chairman and Chief Executive Officer

#### Kinsale Capital Group, Inc.
| 2035 Maywill Street 
 Suite 100           
 Richmond, VA 23230  |
| (804) 289-1300      |

<div align='center'>(Name, address, including zip code, and 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, New York 10001
<div align='center'>(212) 735-3000

_____________________________</div>

Approximate date of commencement of proposed sale to the public: From time to time after the effective date of this registration statement.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box.

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b)