Williamson Robert F III — SEC Form 4 Insider Trading Activity

Summary

Updated Jul 16, 2026

Williamson Robert F III is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days. Lifetime open-market purchases: $43K. Historical track record: 2/5 stars across 3 tracked purchases.

Track Record

InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realised performance after each tracked open-market purchase.

InsiderAlpha rating★★☆☆☆ (2/5)
Total purchases tracked3
Purchases with forward-return data3
30-day win rate3333%
90-day win rate3333%
Avg 5-day return+972.58%
Avg 30-day return+142.11%
Avg 90-day return+2385.08%
Best 30-day return+2594.34%

Recent Transactions

DateTickerCompanyCodeSharesPriceValue
2025-11-14CATXPerspective Therapeutics, Inc.P — Open-market purchase9.5K$2.10$20K
2024-11-27CATXPerspective Therapeutics, Inc.P — Open-market purchase2.6K$3.67$10K
2024-11-27CATXPerspective Therapeutics, Inc.P — Open-market purchase3.6K$3.62$13K

Frequently Asked Questions

Who is Williamson Robert F III?

Williamson Robert F III is a corporate insider — currently tracked as Insider. InsiderAlpha tracks every SEC Form 4 filing in real time.

Has Williamson Robert F III been buying or selling stock?

Recorded transactions: 3 open-market purchases ($43K) and 0 open-market sales () across all tracked filings.

How accurate is Williamson Robert F III's historical track record?

Across 3 tracked purchases, Williamson Robert F III averaged +142.1% avg 30-day return with a 3333% 30-day win rate. InsiderAlpha rates the track record at 2/5 stars.

Where can I see all of Williamson Robert F III'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.

Learn More

Open the live Williamson Robert F III profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.