Company: PENG
Filing Date: 2025-08-27
Form Type: S-3ASR
Source: 0001616533-25-000054
Chunk: 1

Company: Penguin Solutions, Inc.
Filing Date: 2025-08-27
Form: S-3ASR
Chunk 1
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 become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☒ If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐

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 |     | ☐ |
|                         |     |   |     | Emerging growth company   |     | ☐ |

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

#### PROSPECTUS

#### Up to 6,096,103 Shares

#### Common Stock

#### Offered by the Selling Securityholder
This prospectus relates to the resale from time to time of up to 6,096,103 shares of our common stock, $0.03 par value per share (the “common stock”), by the selling securityholder identified in this prospectus (collectively with any donees, pledgees, assignees, transferees or other successors-in-interest, the “Selling Securityholder”), consisting of 6,096,103 shares of common stock initially issuable upon the conversion of 200,000 shares (the “Seller Convertible Preferred Shares”) of our convertible preferred stock, par value $0.03 per share (the “Issued Convertible Preferred Stock”), held by the Selling Securityholder, pursuant to their terms. This prospectus provides you with a general description of the securities. We are registering the resale of the shares covered by this prospectus pursuant to the Selling Securityholder’s registration rights under that certain Amended and Restated Investor Agreement, dated as of June