Company: PENG
Filing Date: 2025-06-30
Form Type: 8-K12B
Source: 0001193125-25-152807
Chunk: 0

Company: Penguin Solutions, Inc.
Filing Date: 2025-06-30
Form: 8-K12B
Chunk 0
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 27, 2025 Penguin Solutions, Inc. (Exact name of registrant as specified in its charter)

| Delaware                                      |     | 001-38102              |     | 36-5142687                      |
| (State or other jurisdictionof incorporation) |     | -CommissionFile Number |     | -IRS EmployerIdentification No. |

| 1390 McCarthy BoulevardMilpitas, CA      |     |     95035 |
| (Address of principal executive offices) |     | -Zip Code |

Registrant’s telephone number, including area code: ( 510) 623-1231 c/o Walkers Corporate Limited 190 Elgin Avenue George Town, Grand Cayman Cayman Islands (Former Name or Former Address, if Changed Since Last Report) Check the appropriate box below if the Form 8-Kfiling is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

| ☐ | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) |

| ☐ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) |

| ☐ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) |

| ☐ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) |

Securities registered pursuant to Section 12(b) of the Act:

| Title of each class                     |     | TradingSymbol(s) |     | Name of each exchangeon which registered |
| Common stock, $0.03 par value per share |     | PENG             |     | Nasdaq Global Select Market              |

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2of the Securities Exchange Act of 1934 (§240.12b-2of this chapter). Emerging Growth Company ☐ If an