Company: APM
Filing Date: 2025-12-05
Form Type: 424B5
Source: 0001213900-25-118752
Chunk: 419

Company: Aptorum Group Ltd
Filing Date: 2025-12-05
Form: 424B5
Chunk 419
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 DiamiR as of May 31, 2025, giving further effect
to the pro forma adjustments described in Note (i) to the “Notes To The Unaudited Pro Forma Condensed Combined Financial Statements”included in this registration statement, as if they had been consummated as of June 30, 2025.

The accompanying unaudited
pro forma condensed combined statement of operations for the year ended December 31, 2024 combine the historical consolidated statement
of operations of Aptorum for the year ended December 31, 2024 and the historical statements of operations of DiamiR for the twelve months
ended February 28, 2025 (consisting of the first nine months of its fiscal year ending May 31, 2025 and the last three months
of its fiscal year ended May 31, 2024), giving effect to the pro forma adjustments described in Note (i) to the “Notes To The Unaudited Pro Forma Condensed Combined Financial Statements” included in this registration statement, as if they had
been consummated on January 1, 2024, the beginning of the earliest period presented. The unaudited pro forma condensed combined statement
of operations for the six months ended June 30, 2025 combine the historical consolidated statement of operations of Aptorum for the six
months ended June 30, 2025 and the historical statements of operations of DiamiR for the six months ended May 31, 2025. DiamiR’s
revenue and net loss for the three months ended February 28, 2025, amounting to $188,909 and $211,183, respectively, are included in the
pro forma condensed combined statements of operations for both the year ended December 31, 2024 and the six months ended May 31, 2025.

The unaudited pro forma condensed
combined financial statements have been derived from and should be read in connection with:

| ● | the accompanying notes to the unaudited pro forma condensed combined financial statements; |

<div align='center'>240</div>

| ● | the sections entitled “Aptorum Management’s                                                                                   
 Discussion and Analysis of Financial Condition and Results of Operations of Aptorum,” “Management’s Discussion and            
 Analysis of Financial Condition and Results of Operations of DiamiR,” and other financial information relating to Aptorum and 
 DiamiR.                                                                                                                       |

The unaudited pro forma condensed
combined financial information