Herndon Mark

Herndon Mark is listed in filings as Chief Financial Officer at Horizon Kinetics Holding Corporation. This profile follows SEC Form 4 activity through May 21, 2026, including purchase activity. Recent filings connect the profile to Horizon Kinetics Holding Corporation (HKHC). The current snapshot covers public activity from Jun 5, 2025 to May 21, 2026. Reported amounts are shown as $2.8K to $2.9K. The page organizes purchases, sales, issuer links, reported share activity, and filing evidence for review as public disclosure data.