Company: APM
Filing Date: 2025-12-05
Form Type: 424B5
Source: 0001213900-25-118752
Chunk: 424

Company: Aptorum Group Ltd
Filing Date: 2025-12-05
Form: 424B5
Chunk 424
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 to the shareholders of Aptorum Group Limited |     | $                  | (4,168,021 | ) |     | $                |   (652,442 | ) |     | $                    | (202,428 | ) |     |       |     | $                               | - |     | $                       | (545,423 | ) |     |       |     | $         | (5,568,314 | ) |

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NOTES TO UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS</div>

The unaudited pro forma condensed
combined financial statements should be read in conjunction with the historical consolidated financial statements of DiamiR (included
herein) as well as those of the Company. The historical consolidated financial statements referred to above for the Company were included
in its Annual Report on Form 20-F for the year ended December 31, 2024 and its Current Report on Form 6-K for the six months
ended June 30, 2025. The historical consolidated financial statements referred to above for DiamiR are contained herein.

The unaudited pro forma condensed
combined statement of financial position reflects the Acquisition as if it had been consummated on June 30, 2025 and the unaudited pro
forma condensed combined statements of operations reflect the Acquisition as if it had been consummated on January 1, 2024. Adjustments
related to the Acquisition are reflected in the “Other transaction accounting adjustments” column on the pro forma condensed
combined financial statements.

The unaudited pro forma condensed
combined statement of financial position reflects the Offering as if it had been consummated on June 30, 2025 and the unaudited pro forma
condensed combined statements of operations reflect the Offering as if it had been consummated on January 1, 2024. Adjustments related
to the Offering are reflected in the “Transaction accounting adjustments” column on the pro forma condensed combined financial
statements.

The following transaction
accounting adjustments are included in the unaudited pro forma condensed combined financial statements:

| (a) | Gives                                                                                                                                       
 pro forma effect to the closing of the Offering and, accordingly, reflects the issuance of 1,000,000 Class A ordinary shares and 2,000,000  
 Investor Warrants for gross proceeds of $2,000,000. The Company determined that the Investor Warrants are classified as warrant liabilities