Company: FWRG
Filing Date: 2025-11-05
Form Type: S-3ASR
Source: 0001628280-25-049615
Chunk: 3

Company: First Watch Restaurant Group, Inc.
Filing Date: 2025-11-05
Form: S-3ASR
Chunk 3
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 shares of our common stock.

Neither the Securities and Exchange Commission (the “SEC”) nor any state securities commission has approved or disapproved of these securities or determined if this prospectus or the accompanying prospectus supplement is truthful or complete. Any representation to the contrary is a criminal offense.

<div align='center'>The date of this prospectus is November 5, 2025.</div>

### TABLE OF CONTENTS
| ABOUT THIS PROSPECTUS                                                                |     |  1 |
| WHERE YOU CAN FIND MORE INFORMATION; INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE |     |  3 |
| CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS                                 |     |  5 |
| THE COMPANY                                                                          |     |  8 |
| RISK FACTORS                                                                         |     |  9 |
| USE OF PROCEEDS                                                                      |     | 10 |
| DESCRIPTION OF CAPITAL STOCK                                                         |     | 11 |
| SELLING STOCKHOLDERS                                                                 |     | 14 |
| PLAN OF DISTRIBUTION                                                                 |     | 15 |
| LEGAL MATTERS                                                                        |     | 17 |
| EXPERTS                                                                              |     | 17 |

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

### ABOUT THIS PROSPECTUS
This prospectus is part of a registration statement that we filed with the SEC utilizing a “shelf” registration process. Under this shelf registration process, the selling stockholders may offer and sell, from time to time, in one or more offerings, up to 5,289,784 shares of our common stock. This prospectus provides you with a general description of the common stock that the selling stockholders may offer. Each time the selling stockholders offer and sell shares of our common stock using this prospectus, they will provide a prospectus supplement and attach it to this prospectus and may also provide you with a free writing prospectus. The prospectus supplement and any free writing prospectus will contain more specific information about the shares of common stock being offered and sold and the specific terms of that offering. The prospectus supplement may also add, update, change, or clarify information contained in or incorporated by reference into this prospectus. Any statement that we make in this prospectus will be modified or superseded by any inconsistent statement made by us or the selling stockholders in a prospectus supplement. If there is any inconsistency between the information in this prospectus and the information in the prospectus supplement, you should rely on the