---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-24-080040"
form_type: "8-K"
ticker: "ABTC"
cik: "0001755953"
company_name: "American Bitcoin Corp."
filed_at: "2024-09-19T23:59:59+00:00"
generated_at: "2026-05-31T03:40:52.493708+00:00"
event_type: "leadership"
sentiment: "negative"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Gryphon Digital Mining fires CEO Robby Chang for cause, appoints Steve Gutterman as CEO, Jimmy Vaiopoulos as Chairman

## Summary
- Robby Chang terminated as CEO and President for cause on Sept 17, 2024; remains on Board.
- Steve Gutterman appointed CEO; receives $450K base salary, $1M sign-on RSU grant, bonus tied to stock price/market cap.
- Jimmy Vaiopoulos appointed Chairman; Board expanded to 7 members; Vaiopoulos previously CFO of Hut 8 Mining.
- Brittany Kaiser removed as Chairperson; Gutterman resigns from Audit and Nominating committees; Vaiopoulos joins both.
- Press release notes Gutterman has driven $700M+ revenue growth and 92 M&A transactions across his career.

## SEC filing metadata
- accession: 0001213900-24-080040
- form_type: 8-K
- ticker: ABTC
- cik: 0001755953
- company_name: American Bitcoin Corp.
- filed_at: 2024-09-19T23:59:59+00:00
- event_type: leadership
- sentiment: negative
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 1.01, 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1755953/000121390024080040/0001213900-24-080040-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1755953/000121390024080040/ea0215000-8k_gryphon.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-24-080040
- JSON: https://secwatch.observer/filing/0001213900-24-080040.json
- Plain text: https://secwatch.observer/filing/0001213900-24-080040.txt

## Key facts
- Executive change
  Robby Chang was terminated as Chief Executive Officer and President at American Bitcoin Corp..
  - Action: terminated
  - Role: Chief Executive Officer and President
  source text: On September 17, 2024, Robby Chang was terminated as Chief Executive Officer and President for cause, with immediate effect, by the board of directors (the “ Board ”) of Gryphon Digital Mining, Inc. (the “ Company ”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1755953/000121390024080040/0001213900-24-080040-index.htm
- Executive change
  Steve Gutterman was appointed as Chief Executive Officer at American Bitcoin Corp..
  - Action: appointed
  - Role: Chief Executive Officer
  source text: On September 17, 2024, the Board appointed Steve Gutterman as Chief Executive Officer of the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1755953/000121390024080040/0001213900-24-080040-index.htm

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