Summary
Updated Aug 30, 2026
Alice C. Brennan is Director of Horizon Kinetics Holding Corp (HKHC). 4 SEC Form 4 filings on record going back to 2025, most recently on 28 August 2026. Most recent open-market trade: bought $5K of HKHC on 28 August 2026. Lifetime open-market purchases: $20K.
Recent Transactions
4Every recent SEC Form 4 transaction Alice C. Brennan has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Alice C. Brennan files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Brent D. Rosenthal - $118K of HKHC open-market activity in the last 12 months
- Murray Stahl - $18K of HKHC open-market activity in the last 12 months
- Mark Herndon - $15K of HKHC open-market activity in the last 12 months
- Daniel J. Roller - $13K of HKHC open-market activity in the last 12 months
- Allison Nagelberg - $5K of HKHC open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Alice C. Brennan?
Alice C. Brennan is a corporate insider, tracked as Director of Horizon Kinetics Holding Corp (HKHC). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Alice C. Brennan submitted recently?
3 primary Form 4 filings in the last 90 days, covering 1 company.
Has Alice C. Brennan been buying or selling stock?
Recorded transactions: 4 open-market purchases ($20K) and 0 open-market sales across all tracked filings.
Where can I see all of Alice C. Brennan's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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