Insider · SEC Form 4 filer

Mark Klein

Companies

Where they file as an insider

Neostellar Capital (NSLR) Chairman, CEO and President, Director Latest filing Sep 21, 2026

Track record

Did their buys beat the typical stock?

Open-market buys20
Quarters checked 6 months later0
Beat the typical stock —
Quarters too new to check2

Too soon to tell. None of their buys has a finished 6-month check yet.

Neostellar Capital (NSLR) Bought Aug 10–Sep 21, 2026 · $290K · 31,040 shares Too new Too new. Its 6-month check uses prices as of Mar 31, 2027.
Suro Capital (SSSS) Bought Apr 21–22, 2026 · $65.8K · 5,000 shares Too new Too new. Its 6-month check uses prices as of Dec 31, 2026.
Suro Capital (SSSS) Bought Aug 11–12, 2025 · $124K · 14,571 shares Not counted Not counted. We have no fund price for this stock on both Sep 30, 2025 and Mar 31, 2026.
Suro Capital (SSSS) Bought May 9, 2025 · $86.8K · 16,500 shares Not counted Not counted. We have no fund price for this stock on both Jun 30, 2025 and Dec 31, 2025.
Suro Capital (SSSS) Bought Nov 26–Dec 2, 2024 · $422K · 82,000 shares Not counted Not counted. We have no fund price for this stock on both Dec 31, 2024 and Jun 30, 2025.
Suro Capital (SSSS) Bought Aug 20, 2024 · $46.1K · 12,000 shares Not counted Not counted. We have no fund price for this stock on both Sep 30, 2024 and Mar 31, 2025.
Suro Capital (SSSS) Bought Nov 17–Dec 6, 2023 · $457K · 114,000 shares Not counted Not counted. We have no fund price for this stock on both Dec 31, 2023 and Jun 30, 2024.

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