Summary
Updated Aug 31, 2026
Robert F. Williamson III files SEC Form 4 reports at Perspective Therapeutics, Inc. (CATX). 3 SEC Form 4 filings on record going back to 2024, most recently on 4 March 2026. Most recent open-market trade: bought $20K of CATX on 14 November 2025. Lifetime open-market purchases: $43K. Historical track record: 2/5 stars across 3 tracked purchases.
Recent Transactions
3Every recent SEC Form 4 transaction Robert F. Williamson III has reported, most recent first.
Track Record
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realized performance after each tracked open-market purchase.
| Metric | Value |
|---|---|
| InsiderAlpha rating | ★★☆☆☆ (2/5) |
| Total purchases tracked | 3 |
| Purchases with forward-return data | 3 |
| 30-day win rate | 33% |
| 90-day win rate | 33% |
| Avg 5-day return | +9.73% |
| Avg 30-day return | +1.42% |
| Avg 90-day return | +23.85% |
| Best 30-day return | +25.94% |
Trading Pattern
InsiderAlpha's records for Robert F. Williamson III go back to 2024: 3 primary Form 4 filings, an average of 1.0 per year. The typical open-market purchase is $14K (3 buys totaling $43K). The largest single buy on record is $20K of CATX in 2025. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Robert F. Williamson III 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.
- Jonathan Robert Hunt - $22K of CATX 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 Robert F. Williamson III?
Robert F. Williamson III is a corporate insider of Perspective Therapeutics, Inc. (CATX). InsiderAlpha holds 3 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Robert F. Williamson III last file a Form 4?
The most recent primary Form 4 on record is dated 4 March 2026, one of 3 filings going back to 2024.
Has Robert F. Williamson 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 Robert F. Williamson III's historical track record?
Across 3 tracked purchases, Robert F. Williamson III averaged +1.4% avg 30-day return with a 33% 30-day win rate. InsiderAlpha rates the track record at 2/5 stars.
Where can I see all of Robert F. Williamson 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.
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