Company: APXT
Filing Date: 2025-10-27
Form Type: S-1MEF
Source: 0001213900-25-102679
Chunk: 1

Company: Apex Treasury Corp
Filing Date: 2025-10-27
Form: S-1MEF
Chunk 1
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 Act, please check the following box and list the Securities Act registration
statement number of the earlier effective registration statement for the same offering. ☒
333-289485

If this Form is a post-effective amendment filed
pursuant to Rule 462(c) under the Securities 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 post-effective amendment filed
pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of
the earlier effective registration statement for the same offering. ☐

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. ☐

This registration statement shall become effective upon filing with the Securities and Exchange Commission in accordance with Rule 462(b) under the Securities Act of 1933, as amended.

<div align='center'>Explanatory Note</div>

This Registration Statement
on Form S-1 is being filed by Apex Treasury Corporation, a Cayman Islands exempted company (the “Registrant”), pursuant to
Rule 462(b) under the Securities Act of 1933, as amended (the “Act”), and General Instruction V to Form S-1. This Registration
Statement relates to the Registrant’s Registration Statement on Form S-1, as amended (File No. 333-289485) (the “Prior Registration
Statement”), initially filed by the Registrant on August 11, 2025, as amended on October 1, 2025 and October 7, 2025, which became