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The red node is Mark. Pale nodes are charities, grey nodes are companies, and darker grey nodes are the people who sit on them. Dashed links are historical or inferred. Click any node to explore.

Person

Mark Wesley Callahan

Mark Wesley Callahan was previously a director of Houston Casualty Company (until 2023). Source: Companies House records.

Director at Houston Casualty Company

  • 0 current roles
  • 1 previous role
  • Served alongside 15 people
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Official record Companies House · updated 11th October 2026

Roles

1 role across 1 organisation (0 current, 1 previous)

Previous roles (1)

Company roles, current and past, as filed at Companies House.

People Mark has served alongside

15 people across 1 organisation

Based on overlapping official board records. Calculated from official records It does not mean they know each other. Only formal co-service is listed: people are never joined on a matching name alone.

Houston Casualty Company 15 people · 2011-present

Sources

Companies House
Officer appointments and resignations.
Edition
Register edition compiled 11th October 2026
Identity
Records are treated as the same person only where the evidence confirms it. How people are matched

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