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US INSIDER PROFILE · NON-SCORING RESEARCH
Charles Dirkson R
Director | See Remarks
Identity: SEC reporting-owner CIK · Reporting-owner CIK: 0001335344
Purchase history
- Companies traded
- 3
- Purchases · 12M
- 3
- Purchases · 24M
- 4
- Average purchase
- $10.8M
- Median purchase
- $3.0M
- Gross purchase value
- $43.3M
Companies: Builders FirstSource, Inc. | DPC Holdings Ltd | Loar Holdings Inc.
4 SEC accession(s) · 0 joint-owner event(s). Values are reported Form 4 transaction values in USD.
Qualifying purchase disclosures
| Published | Company | Ticker | Role | Reported value | SEC source |
|---|---|---|---|---|---|
| 2026-06-26 | DPC Holdings Ltd | DPC | Director | $36.8M | Open filing |
| 2026-03-13 | Loar Holdings Inc. | LOAR | See Remarks | $3.0M | Open filing |
| 2026-03-12 | Loar Holdings Inc. | LOAR | See Remarks | $3.0M | Open filing |
| 2025-05-29 | Builders FirstSource, Inc. | BLDR | Director | $548.4K | Open filing |
Post-purchase outcomes
Excess return = stock return − S&P 500 ETF (SPY adjusted close) return. Returns start on the first shared trading session on or after publication.
| Period | Completed events | Price coverage | Hit rate | Median excess return | Average excess return | Worst excess return |
|---|---|---|---|---|---|---|
| 5D | 1Small Sample | 25.0% (1/4) | 0.0% (0/1) | -0.2% | -0.2% | -0.2% |
| 20D | 1Small Sample | 25.0% (1/4) | 100.0% (1/1) | +1.8% | +1.8% | +1.8% |
| 60D | 1Small Sample | 25.0% (1/4) | 0.0% (0/1) | -20.1% | -20.1% | -20.1% |
| 120D | 0No Data | 0.0% (0/3) | — | — | — | — |
Research patterns
- First purchase in 12M
- 2/3
- Large purchase ≥ $100k
- 4/4
- Cluster buying · 15D
- 2/4
- Buying the dip
- 0/—
Routine / opportunistic: Not classifiable. These labels never affect the score or ranking.
Small samples remain visible but are not scored. This research enrichment never affects US-v1.1.