---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-26-079416"
form_type: "8-K"
ticker: "APM"
cik: "0001734005"
company_name: "Aptorum Group Ltd"
filed_at: "2026-07-20T12:15:22+00:00"
generated_at: "2026-07-20T12:20:12.315604+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Aptorum completes merger with DiamiR, redomiciles as Niki BioSolutions, trades under NIKI

## Summary
- Merger closed July 20, 2026; Aptorum redomiciled to Delaware and renamed Niki BioSolutions, Inc.
- DiamiR shareholders received ~1.98M shares of Niki common; Aptorum shareholders got ~814K common and ~180K Series A preferred.
- 1-for-10 reverse stock split effective July 20, reducing outstanding Class A from ~6.35M to ~635K shares.
- New board: Ian Huen (Chairman), Kira Sheinerman, Justin Wu, Douglas Arner, Laura A. Philips, Alidad Mireskandari (observer).
- Adopted 2026 Incentive Plan reserving 4.5M shares plus annual evergreen increases.

## SEC filing metadata
- accession: 0001213900-26-079416
- form_type: 8-K
- ticker: APM
- cik: 0001734005
- company_name: Aptorum Group Ltd
- filed_at: 2026-07-20T12:15:22+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.01, 3.03, 5.02, 5.03, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1734005/000121390026079416/0001213900-26-079416-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1734005/000121390026079416/ea0298262-8k_nikibio.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-26-079416
- JSON: https://secwatch.observer/filing/0001213900-26-079416.json
- Plain text: https://secwatch.observer/filing/0001213900-26-079416.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.