Company: HBCP
Filing Date: 2025-11-21
Form Type: S-3
Source: 0001628280-25-053512
Chunk: 1

Company: HOME BANCORP, INC.
Filing Date: 2025-11-21
Form: S-3
Chunk 1
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 on The Nasdaq Stock Market LLC or any other securities exchange.

Investing in our securities involves risks. See the section entitled “Risk Factors” contained on page

#### 7
of this prospectus, and the risk factors that may be included in the applicable prospectus supplement and in our periodic reports and other documents we file with or furnish to the Securities and Exchange Commission.

These securities are not savings accounts, deposits or other obligations of any bank and are not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.

This prospectus may be used to offer and sell securities only if accompanied by the prospectus supplement for those securities.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined that this prospectus or the accompanying prospectus supplement is accurate or complete. Any representation to the contrary is a criminal offense.

#### The date of this prospectus is [•], 2025
<div align='center'>TABLE OF CONTENTS</div>

|                                                                                                            |     | Page |
| Important Notice About Information Presented In This Prospectus And The Accompanying Prospectus Supplement |     |    1 |
| About This Prospectus                                                                                      |     |    2 |
| Where You Can Find More Information                                                                        |     |    3 |
| Special Note Regarding Forward-looking Statements                                                          |     |    4 |
| Prospectus Summary                                                                                         |     |    5 |
| Description Of Securities We May Offer                                                                     |     |    5 |
| Risk Factors                                                                                               |     |    7 |
| Use Of Proceeds                                                                                            |     |    7 |
| Description Of Debt Securities                                                                             |     |    7 |
| Description Of Common And Preferred Stock                                                                  |     |   17 |
| Description Of Depositary Shares                                                                           |     |   24 |
| Description Of Purchase Contracts And Units                                                                |     |   26 |
| Description Of Warrants                                                                                    |     |   27 |
| Description Of Subscription Rights                                                                         |     |   28 |
| Description Of Units                                                                                       |     |   29 |
| Description Of GlobalSecurities                                                                            |     |   29 |
| Plan Of Distribution                                                                                       |     |   31 |
| Legal Matters                                                                                              |     |   32 |
| Experts                                                                                                    |     |   32 |

<div align='center'>1</div>

### IMPORTANT NOTICE ABOUT INFORMATION PRESENTED IN THIS PROSPECTUS AND THE ACCOMPANYING PROSPECT