---
schema_version: "secwatch.filing_event.v1"
accession: "0001493152-23-000906"
form_type: "8-K"
ticker: "XTNT"
cik: "0001453593"
company_name: "Xtant Medical Holdings, Inc."
filed_at: "2023-01-09T23:59:59+00:00"
generated_at: "2026-06-20T17:40:57.485278+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Xtant Medical appoints Mark Schallenberger as COO effective Jan 16, 2023

## Summary
- Mark Schallenberger, previously COO at Surgenex, appointed COO at Xtant Medical effective Jan 16, 2023.
- Annual base salary of $400,000 with bonus of up to 50% of base salary; option for 105,000 shares and RSUs for 89,000 shares.
- Role is newly created, focused on operational modernization and product development.
- Previously served at Xtant (formerly Bacterin) as Director of Scientific Affairs from 2010-2016.

## SEC filing metadata
- accession: 0001493152-23-000906
- form_type: 8-K
- ticker: XTNT
- cik: 0001453593
- company_name: Xtant Medical Holdings, Inc.
- filed_at: 2023-01-09T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1453593/000149315223000906/0001493152-23-000906-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1453593/000149315223000906/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001493152-23-000906
- JSON: https://secwatch.observer/filing/0001493152-23-000906.json
- Plain text: https://secwatch.observer/filing/0001493152-23-000906.txt

## Key facts
- Executive change
  Mark A. Schallenberger was appointed as Chief Operations Officer at Xtant Medical Holdings, Inc..
  - Action: appointed
  - Role: Chief Operations Officer
  source text: On January 9, 2023, Xtant Medical Holdings, Inc. (the “Company”) announced the appointment of Mark A. Schallenberger as Chief Operations Officer, effective as of January 16, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1453593/000149315223000906/0001493152-23-000906-index.htm

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