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US INSIDER PROFILE · NON-SCORING RESEARCH
Amron Arthur H
Director
Identity: SEC reporting-owner CIK · Reporting-owner CIK: 0001179697
Purchase history
- Companies traded
- 1
- Purchases · 12M
- 3
- Purchases · 24M
- 4
- Average purchase
- $13.6K
- Median purchase
- $16.2K
- Gross purchase value
- $54.3K
Companies: MAMMOTH ENERGY SERVICES, 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 |
|---|---|---|---|---|---|
| 2026-06-15 | MAMMOTH ENERGY SERVICES, INC. | TUSK | Director | $14.6K | Open filing |
| 2026-05-28 | MAMMOTH ENERGY SERVICES, INC. | TUSK | Director | $17.9K | Open filing |
| 2025-12-15 | MAMMOTH ENERGY SERVICES, INC. | TUSK | Director | $18.9K | Open filing |
| 2024-12-16 | MAMMOTH ENERGY SERVICES, INC. | TUSK | Director | $3.0K | 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 | 4Small Sample | 100.0% (4/4) | 75.0% (3/4) | +3.5% | +5.6% | -3.8% |
| 20D | 4Small Sample | 100.0% (4/4) | 50.0% (2/4) | +2.7% | +7.1% | -8.3% |
| 60D | 4Small Sample | 100.0% (4/4) | 25.0% (1/4) | -2.3% | +1.5% | -16.7% |
| 120D | 2Small Sample | 100.0% (2/2) | 50.0% (1/2) | +41.4% | +41.4% | -1.5% |
Research patterns
- First purchase in 12M
- 0/3
- Large purchase ≥ $100k
- 0/4
- Cluster buying · 15D
- 0/4
- Buying the dip
- 2/4
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.