Insider · SEC Form 4 filer

Murray Stahl

Past buys: 11 of 19 beat

Companies

Where they file as an insider

RENN Fund (RCG) President/Co-Portfolio Manager, 10% owner Latest filing Apr 6, 2026
Miami International (MIAX) Director, 10% owner Latest filing Mar 5, 2026
Horizon Kinetics Holding (HKHC) CEO and CIO, Director, 10% owner Latest filing Dec 10, 2025
Texas Pacific Land (TPL) Director, 10% owner Latest filing Jun 26, 2025

Track record

Did their buys beat the typical stock?

Open-market buys4927
Quarters checked 6 months later19
Beat the typical stock 11 of 19
Quarters too new to check1

11 of 19 checked quarters beat the typical stock. A past record is data, not a forecast.

RENN Fund (RCG) Bought Apr 1–6, 2026 · $10.9K · 3,402 shares Too new Too new. Its 6-month check uses prices as of Dec 31, 2026.
Miami International (MIAX) Bought Mar 5, 2026 · $310K · 7,200 shares Behind typical Mar 31, 2026 $38.92 → Sep 30, 2026 $33.50 · −13.9% (typical stock +1.7%)
RENN Fund (RCG) Bought Jan 2–Mar 31, 2026 · $197K · 69,168 shares Behind typical Mar 31, 2026 $3.28 → Sep 30, 2026 $2.98 · −9.1% (typical stock +1.7%)
Miami International (MIAX) Bought Dec 12, 2025 · $100K · 2,439 shares Behind typical Dec 31, 2025 $44.38 → Jun 30, 2026 $37.16 · −16.3% (typical stock +4.7%)
Horizon Kinetics Holding (HKHC) Bought Nov 24–Dec 10, 2025 · $4.32K · 158 shares Not counted Not counted. We have no fund price for this stock on both Dec 31, 2025 and Jun 30, 2026.
RENN Fund (RCG) Bought Oct 1–Dec 31, 2025 · $190K · 72,600 shares Beat typical Dec 31, 2025 $2.57 → Jun 30, 2026 $2.99 · +16.4% (typical stock +4.7%)
Miami International (MIAX) Bought Sep 26, 2025 · $167 · 4 shares Beat typical Sep 30, 2025 $40.26 → Mar 31, 2026 $38.92 · −3.3% (typical stock −3.4%)
Horizon Kinetics Holding (HKHC) Bought Aug 20–Sep 5, 2025 · $9.45K · 246 shares Not counted Not counted. We have no fund price for this stock on both Sep 30, 2025 and Mar 31, 2026.
RENN Fund (RCG) Bought Jul 1–Sep 30, 2025 · $191K · 72,320 shares Beat typical Sep 30, 2025 $2.55 → Mar 31, 2026 $3.28 · +28.6% (typical stock −3.4%)
Horizon Kinetics Holding (HKHC) Bought May 21–Jun 10, 2025 · $2.07K · 49 shares Not counted Not counted. We have no fund price for this stock on both Jun 30, 2025 and Dec 31, 2025.
RENN Fund (RCG) Bought Apr 1–Jun 30, 2025 · $201K · 77,134 shares Behind typical Jun 30, 2025 $2.66 → Dec 31, 2025 $2.57 · −3.4% (typical stock +2.1%)
Texas Pacific Land (TPL) Bought Apr 1–Jun 26, 2025 · $441K · 362 shares Not counted Not counted. We have no fund price for this stock on both Jun 30, 2025 and Dec 31, 2025.
Texas Pacific Land (TPL) Bought Feb 24–Mar 28, 2025 · $214K · 160 shares Behind typical Mar 31, 2025 $1324.99 → Sep 30, 2025 $933.64 · −29.5% (typical stock +7.3%)
RENN Fund (RCG) Bought Jan 2–Mar 31, 2025 · $200K · 74,824 shares Behind typical Mar 31, 2025 $2.55 → Sep 30, 2025 $2.55 · +0.0% (typical stock +7.3%)
Horizon Kinetics Holding (HKHC) Bought Nov 15–Dec 9, 2024 · $9.03K · 228 shares Not counted Not counted. We have no fund price for this stock on both Dec 31, 2024 and Jun 30, 2025.
RENN Fund (RCG) Bought Oct 1–Dec 31, 2024 · $184K · 78,249 shares Beat typical Dec 31, 2024 $2.23 → Jun 30, 2025 $2.66 · +19.3% (typical stock −3.4%)
Texas Pacific Land (TPL) Bought Oct 1–Nov 15, 2024 · $274K · 240 shares Behind typical Dec 31, 2024 $1105.96 → Jun 30, 2025 $1056.39 · −4.5% (typical stock −3.4%)
Horizon Kinetics Holding (HKHC) Bought Sep 3–9, 2024 · $1.04K · 40 shares Not counted Not counted. We have no fund price for this stock on both Sep 30, 2024 and Mar 31, 2025.
Texas Pacific Land (TPL) Bought Aug 16–Sep 30, 2024 · $163K · 192 shares Beat typical Sep 30, 2024 $884.74 → Mar 31, 2025 $1324.99 · +49.8% (typical stock −7.5%)
RENN Fund (RCG) Bought Jul 1–Sep 30, 2024 · $124K · 66,221 shares Beat typical Sep 30, 2024 $2.12 → Mar 31, 2025 $2.55 · +20.3% (typical stock −7.5%)
Texas Pacific Land (TPL) Bought Apr 2–15, 2024 · $42.3K · 72 shares Beat typical Jun 30, 2024 $734.27 → Dec 31, 2024 $1105.96 · +50.6% (typical stock +3.9%)
RENN Fund (RCG) Bought Apr 1–Jun 28, 2024 · $8.95K · 5,391 shares Beat typical Jun 30, 2024 $1.70 → Dec 31, 2024 $2.23 · +31.2% (typical stock +3.9%)
Texas Pacific Land (TPL) Bought Jan 3–Mar 28, 2024 · $602K · 405 shares Beat typical Mar 31, 2024 $578.51 → Sep 30, 2024 $884.74 · +52.9% (typical stock +3.2%)
RENN Fund (RCG) Bought Jan 2–Mar 28, 2024 · $6.08K · 3,702 shares Beat typical Mar 31, 2024 $1.58 → Sep 30, 2024 $2.12 · +34.2% (typical stock +3.2%)
Texas Pacific Land (TPL) Bought Dec 15–29, 2023 · $116K · 72 shares Behind typical Dec 31, 2023 $1572.45 → Jun 30, 2024 $734.27 · −53.3% (typical stock −1.2%)
RENN Fund (RCG) Bought Oct 2–Dec 29, 2023 · $29.9K · 17,270 shares Beat typical Dec 31, 2023 $1.71 → Jun 30, 2024 $1.70 · −0.6% (typical stock −1.2%)
RENN Fund (RCG) Bought Sep 29, 2023 · $752 · 420 shares Not counted Not counted. We have no fund price for this stock on both Sep 30, 2023 and Mar 31, 2024.
RENN Fund (RCG) Bought Jul 1, 2005 · $47 · 18 shares Not counted Not counted. We have no fund price for this stock on both Sep 30, 2005 and Mar 31, 2006.

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