Company: HPP
Filing Date: 2025-02-25
Form Type: POSASR
Source: 0001193125-25-035221
Chunk: 1

Company: Hudson Pacific Properties, Inc.
Filing Date: 2025-02-25
Form: POSASR
Chunk 1
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 Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐ If this Form is a registration statement pursuant to General Instruction I.D. or a post-effectiveamendment thereto that shall become effective on filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☒ If this Form is a post-effectiveamendment 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-acceleratedfiler, 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-2of the Exchange Act. Hudson Pacific Properties, Inc.

| Large accelerated filer |     | ☐ |     | Accelerated filer         |     | ☒ |
| Non-accelerated filer   |     | ☐ |     | Smaller reporting company |     | ☐ |
|                         |     |   |     | Emerging growth company   |     | ☐ |

Hudson Pacific Properties, L.P.

| 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. Hudson Pacific Properties, Inc.☐ Hudson Pacific Properties, L.P.☐

EXPLANATORY NOTE

This Post-Effective Amendment No. 1 to the Registration Statement on Form S-3ASR (File No. 333-278965 and 333-278965-01) (“Post-Effective Amendment No. 1”) of Hudson Pacific Properties, Inc. (the
“Company”) and Hudson Pacific Properties, L.P. (the “operating partnership”), is