Updated Jul 16, 2026
Leopold Diane has filed 5 SEC Form 4 filings across 3 companies in the last 90 days — buying. Lifetime open-market purchases: $602K. Historical track record: 3/5 stars across 3 tracked purchases.
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 | ★★★☆☆ (3/5) |
|---|---|
| Total purchases tracked | 3 |
| Purchases with forward-return data | 3 |
| 30-day win rate | 6667% |
| 90-day win rate | 6667% |
| Avg 5-day return | -23.44% |
| Avg 30-day return | +290.27% |
| Avg 90-day return | +1292.44% |
| Best 30-day return | +460.21% |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-06-17 | MKL | MARKEL GROUP INC. | J — Other acquisition / disposition | 66 | $1,668.65 | $110K |
| 2026-05-22 | MKL | MARKEL GROUP INC. | A — Grant or award | 89 | $0.00 | |
| 2026-05-19 | NVT | nVent Electric plc | A — Grant or award | 976 | $0.00 | |
| 2026-05-11 | CMS | CMS ENERGY CORP | A — Grant or award | 2.4K | $0.00 | |
| 2026-05-08 | MKL | MARKEL GROUP INC. | P — Open-market purchase | 50 | $1,789.19 | $89K |
| 2026-05-08 | MKL | MARKEL GROUP INC. | P — Open-market purchase | 100 | $1,792.61 | $179K |
| 2026-02-27 | CMS | CMS ENERGY CORP | P — Open-market purchase | 2.0K | $76.70 | $153K |
| 2026-02-23 | CMS | CMS ENERGY CORP | A — Grant or award | 769 | $0.00 | |
| 2026-01-16 | NVT | nVent Electric plc | P — Open-market purchase | 100 | $90.07 | $9K |
| 2026-01-16 | NVT | nVent Electric plc | P — Open-market purchase | 1.9K | $89.84 | $171K |
| 2025-07-17 | NVT | nVent Electric plc | A — Grant or award | 1.7K | $0.00 | |
| 2025-06-13 | MKL | MARKEL GROUP INC. | J — Other acquisition / disposition | 63 | $1,735.89 | $110K |
| 2025-05-21 | MKL | MARKEL GROUP INC. | A — Grant or award | 88 | $0.00 |
Leopold Diane is a corporate insider — currently tracked as Director of MARKEL GROUP INC. (MKL). InsiderAlpha tracks every SEC Form 4 filing in real time.
5 primary Form 4 filings in the last 90 days, covering 3 companies.
Recorded transactions: 5 open-market purchases ($602K) and 0 open-market sales () across all tracked filings.
Across 3 tracked purchases, Leopold Diane averaged +290.3% avg 30-day return with a 6667% 30-day win rate. InsiderAlpha rates the track record at 3/5 stars.
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.
Open the live Leopold Diane profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.