Insider · SEC Form 4 filer

Diane Leopold

Companies

Where they file as an insider

nVent Electric (NVT) Director Latest filing Jul 17, 2026
Markel Group (MKL) Director Latest filing Jun 15, 2026
CMS Energy (CMS) Director Latest filing May 8, 2026
Dominion Energy (D) EVP, COO & Pres. Cont. Energy Latest filing Feb 26, 2024

Track record

Did their buys beat the typical stock?

Open-market buys5
Quarters checked 6 months later2
Beat the typical stock —
Quarters too new to check1

Too soon to tell. 2 quarters have finished so far. We show a record once 3 have.

Markel Group (MKL) Bought May 6–7, 2026 · $269K · 150 shares Too new Too new. Its 6-month check uses prices as of Dec 31, 2026.
CMS Energy (CMS) Bought Feb 25, 2026 · $153K · 2,000 shares Behind typical Mar 31, 2026 $77.58 → Sep 30, 2026 $63.08 · −18.7% (typical stock +1.7%)
nVent Electric (NVT) Bought Aug 13, 2025 · $180K · 2,000 shares Beat typical Sep 30, 2025 $98.64 → Mar 31, 2026 $118.28 · +19.9% (typical stock −3.4%)

Each row is one stock in one quarter, however many buys it took. We take the stock's price at the end of that quarter and again 6 months later, and compare it with the typical stock over the same dates. Prices are quarter-end values from funds' 13F reports (the middle value across 3 or more funds), through Sep 30, 2026. Moves past 3 times up or down, mostly stock splits, are left out. How we tested this.

Past results. This is data, not advice.

Where this data comes from. Insider trades, fund holdings, activist stakes and company results come from public SEC EDGAR filings (Forms 4, 13F, 13D/13G, 10-Q and 8-K). Congress trades come from the STOCK Act reports members file with the House Clerk and the Senate. Daily closing prices come from post-no-preference/stocks on DoltHub, a community-run database shared under CC BY-SA 4.0; the prices we show stay under that license. They are each day's close, not live or official exchange prices.

This is data, not investment advice. About StockToast · Your watchlist