---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-26-031830"
form_type: "8-K"
ticker: null
cik: "0001898474"
company_name: "Signing Day Sports, Inc."
filed_at: "2026-03-19T23:59:59+00:00"
generated_at: "2026-05-15T09:42:15.935641+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Signing Day Sports closes business combination with Blockchain; now trades as AIB on NYSE American

## Summary
- Business combination closed Mar 16; each SGN share exchanged for 0.09334 Blockchain shares; SGN delisted, AIB begins trading Mar 17.
- Former One Blockchain members own ~88.3% of Blockchain; former SGN stockholders ~8.5%; Maxim Group ~3.2%.
- Terminated Purchase Agreement with Helena Global on Mar 13; effective Mar 20.
- All prior officers and directors resigned Mar 16; Jerry Tang appointed CEO, Jolienne Halisky CFO.
- Issued 3,172,704 additional termination shares to Boustead on Mar 13.

## SEC filing metadata
- accession: 0001213900-26-031830
- form_type: 8-K
- cik: 0001898474
- company_name: Signing Day Sports, Inc.
- filed_at: 2026-03-19T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 1.02, 3.02, 1.01, 5.01, 8.01, 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1898474/000121390026031830/0001213900-26-031830-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1898474/000121390026031830/ea0282461-8k_signing.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-26-031830
- JSON: https://secwatch.observer/filing/0001213900-26-031830.json
- Plain text: https://secwatch.observer/filing/0001213900-26-031830.txt

## Source-grounded claims
- claim_id: 5b29f15b2b47b13ffa7e23e407ec7e128bf3c6a1
  claim: Signing Day Sports, Inc. underwent a change of control involving BlockchAIn Digital Infrastructure, Inc. (closed 2026-03-16).
  evidence_excerpt: On March 16, 2026 (the “Closing Date”), the business combination by and among Signing Day Sports, Inc., a Delaware corporation (“Signing Day Sports” or the “Company”), BlockchAIn Digital Infrastructure, Inc., a Delaware corporation (“BlockchAIn”), One Blockchain LLC, a Delaware limited liability company (“One Blockchain”)
  evidence_url: https://www.sec.gov/Archives/edgar/data/1898474/000121390026031830/0001213900-26-031830-index.htm

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