Company: PENG
Filing Date: 2025-08-27
Form Type: S-3ASR
Source: 0001616533-25-000054
Chunk: 3

Company: Penguin Solutions, Inc.
Filing Date: 2025-08-27
Form: S-3ASR
Chunk 3
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 $24.43 per share. The

Issued Convertible Preferred Stock is not listed on any exchange, and we do not intend to list the Issued Convertible Preferred Stock on any exchange.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

#### The date of this prospectus is August 27, 2025.

### TABLE OF CONTENTS
| ABOUT THIS PROSPECTUS                                           |     |  1 |
| SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS               |     |  3 |
| WHERE YOU CAN FIND MORE INFORMATION; INCORPORATION BY REFERENCE |     |  6 |
| THE COMPANY                                                     |     |  8 |
| RISK FACTORS                                                    |     |  9 |
| USE OF PROCEEDS                                                 |     | 10 |
| DESCRIPTION OF SECURITIES                                       |     | 11 |
| SELLING SECURITYHOLDER                                          |     | 22 |
| PLAN OF DISTRIBUTION                                            |     | 24 |
| LEGAL MATTERS                                                   |     | 27 |
| EXPERTS                                                         |     | 27 |

### ABOUT THIS PROSPECTUS
This prospectus is part of a registration statement on Form S-3 that we filed with the U.S. Securities and Exchange Commission (the “SEC”) as a “well-known seasoned issuer” as defined in Rule 405 under the Securities Act of 1933, as amended (the “Securities Act”), using a “shelf” registration process. By using a shelf registration statement, the Selling Securityholder may, from time to time, sell up to 6,096,103 shares of common stock in one or more offerings as described in this prospectus. In connection with the offer and sale of securities by the Selling Securityholder, the Selling Securityholder may provide a supplement to this prospectus that contains specific information about the securities being offered and sold and the specific terms of that offering. We may also authorize one or more free writing prospectuses to be provided to you that may contain material information relating to these offerings. Any such prospectus supplement or free writing prospectus may also add, update or change information contained or incorporated by reference in this prospectus with respect to that offering. If there is any inconsistency between the information in this prospectus and the applicable prospectus supplement or free writing prospectus, you should rely