---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-067769"
form_type: "8-K"
ticker: "XMTR"
cik: "0001657573"
company_name: "Xometry, Inc."
filed_at: "2023-12-04T23:59:59+00:00"
generated_at: "2026-06-07T18:46:27.129277+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.45
calibrated_materiality_score: 0.45
confidence: "high"
source: SEC EDGAR
---

# Xometry appoints Fabio Rosati as Chair of Board; George Hornig retires

## Summary
- George Hornig retired from Board and Chair effective Dec 1, 2023, due to retirement plans; no disagreement.
- Fabio Rosati appointed Chair of Board effective Dec 4, 2023; served on board 7 years, former founding CEO of Upwork.
- Ranjana Clark appointed to Audit Committee effective Dec 4, 2023.

## SEC filing metadata
- accession: 0000950170-23-067769
- form_type: 8-K
- ticker: XMTR
- cik: 0001657573
- company_name: Xometry, Inc.
- filed_at: 2023-12-04T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.45
- calibrated_materiality_score: 0.45
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1657573/000095017023067769/0000950170-23-067769-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1657573/000095017023067769/xmtr-20231204.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-067769
- JSON: https://secwatch.observer/filing/0000950170-23-067769.json
- Plain text: https://secwatch.observer/filing/0000950170-23-067769.txt

## Key facts
- Executive change
  George Hornig resigned as Chair of the Board at Xometry, Inc..
  - Action: resigned
  - Role: Chair of the Board
  source text: On December 1, 2023, George Hornig notified the board of directors (the “Board”) of Xometry, Inc. (the “Company”) of his decision to retire and resign as a member of the Board, as Chair of the Board and as a member of the Audit, Compensation and ESG Committees of the Board, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1657573/000095017023067769/0000950170-23-067769-index.htm
- Executive change
  Fabio Rosati was appointed as Chair of the Board at Xometry, Inc..
  - Action: appointed
  - Role: Chair of the Board
  source text: On December 4, 2023, upon the recommendation of the Nominating and Corporate Governance Committee, the Board appointed Fabio Rosati as Chair of the Board, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1657573/000095017023067769/0000950170-23-067769-index.htm

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