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Profile

Identity, professional record and current appointments.

Overview

Professional record at a glance

A concise summary of information supported by the cited public sources. Missing information is treated as unknown, not as a negative finding.

Current roles
11 current organization shown on this profile
Board positions
Not establishedNo board position is currently listed on this profile
Committee roles
Not establishedNo committee role is currently confirmed by the cited sources
Qualifications
Not establishedNo qualification is currently confirmed by the cited sources

Professional narrative

About

Previously Chief Operations Officer of Surgenex LLC, a medical technology manufacturer. Served in various roles at Xtant Medical Holdings and DCI Donor Services Tissue Bank with expertise in scientific affairs and product development.

Sources are shown with the information they support.

Current roles

Appointments & responsibilities

Executive appointments

Governance

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Committee appointments across companies · Temporarily unavailable

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Connections

Explore the roles, education and affiliations published in this record.

Xtant Medical Holdings, Inc.

Open Xtant Medical Holdings, Inc. profile →

Chief Operating Officer at Xtant Medical Holdings, Inc.

Start not stated → End not stated

current · source reported

Observed: 2026-09-25

Xtant Medical Hold…Xtant Medical Holdings, Inc.Mark A. Schallenbe…

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Relationship map

Connected through the public record

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Experience

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Published record

Featured coverage

Selected publications and public sources used to establish this profile. Inclusion records provenance; it is not an endorsement.

Source 1 · Sec Def 14aPublic profile sourceSupports Chief Operating Officer at Xtant Medical Holdings, Inc. (NYSE: XTNT).Open sourceSource 2 · Sec FilingXTNT 10-K executive officersSupports AI and ML experience, Cybersecurity experience, Executive company, Executive title, Technology background.Open source

Basis

Identifiers, sources, dates and record limitations.

Identifiers

Alpha ID
alpha:person:mark-a-schallenberger
Record version
public-0

Published evidence records

2 evidence records, matching Agent View. Records may refer to different locations or observations in the same document. This count is not a count of independent corroborating sources.

  1. Open source

    sec def 14a · Source published: Jun 23, 2026 · Retrieved: Sep 14, 2026

    Supports 1 claim
    • Professional Role: Chief Operating Officer at Xtant Medical Holdings, Inc. · Claim reviewed: Sep 14, 2026

  2. XTNT 10-K executive officers

    sec filing · Source published: Mar 31, 2026 · Retrieved: May 16, 2026

    Supports 5 claims
    • AI and ML experience: AI and ML experience: not identified in the cited filing · Claim reviewed: May 16, 2026
    • Cybersecurity experience: Cybersecurity experience: not identified in the cited filing · Claim reviewed: May 16, 2026
    • Executive company: Executive at Xtant Medical Holdings, Inc. · Claim reviewed: May 16, 2026
    • Executive title: Executive title: Chief Operating Officer · Claim reviewed: May 16, 2026
    • Technology background: Technology background reported in filings · Claim reviewed: May 16, 2026

Sources

Sources and published information

Each item links to the public source used to support it. When sources disagree, the item is clearly marked for review.

AI and ML experience · Source reportedAI and ML experience: not identified in the cited filing1 source
Verification
Source reported
Confidence
72%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Cybersecurity experience · Source reportedCybersecurity experience: not identified in the cited filing1 source
Verification
Source reported
Confidence
72%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Executive company · Source reportedExecutive at Xtant Medical Holdings, Inc.1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Executive title · Source reportedExecutive title: Chief Operating Officer1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Technology background · Source reportedTechnology background reported in filings1 source
Verification
Source reported
Confidence
72%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

View all sources2 records
  1. https://www.sec.gov/Archives/edgar/data/1453593/000149315226029699/formdef14a.htm

    Sec Def 14a · Tier not stated · Reviewed Sep 14, 2026

    Supports: Chief Operating Officer at Xtant Medical Holdings, Inc. (NYSE: XTNT)

  2. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

    Supports: AI and ML experience · Cybersecurity experience · Executive company · Executive title · Technology background