Murray Stahl

President · Horizon Kinetics Holding Corp

Rank #354 SEC EDGAR (United States) ↗ Files from United States

Details

Officer and board memberInvestment & Asset ManagementHKHCSEC CIK 0001207097

Computed from SEC EDGAR filings and closing prices — not copied from any wealth ranking. Dataset . How we calculate this.

Disclosed holdings
$456.6M
1-day change
▲ 0.74%
Positions on file
4
issuers disclosed in Forms 3/4/5 and Schedules 13D/G

Disclosed holdings over time 53 weekly points

What the 4 currently disclosed positions would have been worth at each week’s closing price. A rising line means the shares got more valuable, not that this person bought more.

How the line is built

Share counts are as last reported to the SEC and held constant; only prices move.

2025-09-05$432.6M – $555.4M2026-09-04

Insider activity Jul 1, 2005 – Mar 30, 2026

Murray Stahl is recorded in filings to the U.S. SEC via EDGAR as officer and board member, and reported 4,537 transactions between Jul 1, 2005 and Mar 30, 2026. The buy and sell totals below count only codes P, S.

Why the other codes are excluded

Share awards (A), shares withheld to pay tax (F), option exercises (M) and gifts (G) also appear in the table, but they are consequences of a pay package or a private transfer, not a decision to buy or sell on the open market. Counting them would turn this into a compensation ranking.

Open-market buys (code P)
$5.29M
4,529 purchases on file priced rows only
Open-market sales (code S)
$7.15M
2 sales on file priced rows only
All reported transactions
4,537
every code, including awards and exercises
Pattern
Net seller in the final 12 months of the window
last 12 months of the window

Events from filings

Detected automatically in the filings linked below. Each headline is built from the numbers in those filings, not written by a model. Newest first; events older than 45 days stay listed and are marked as older.

Murray Stahl bought 7,200 MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) shares for $310,176 on Mar 5, 2026

Large trade for this person

Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.

Murray Stahl bought 7,200 MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) shares for $310,176 on Mar 5, 2026
Date Insider Transaction Shares Price Value Filing
Mar 5, 2026 Murray Stahl P Open-market purchase 7,200 held after: 4,633,842 $43.08 $310,176 SEC filing ↗

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Murray Stahl bought 7,200 MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) shares for $312,336 on Mar 4, 2026

Large trade for this person

Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.

Murray Stahl bought 7,200 MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) shares for $312,336 on Mar 4, 2026
Date Insider Transaction Shares Price Value Filing
Mar 4, 2026 Murray Stahl P Open-market purchase 7,200 held after: 4,626,642 $43.38 $312,336 SEC filing ↗

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Murray Stahl sold 174,632 MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) shares for $7,145,941 on Mar 2, 2026

Large trade for this person

Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.

Murray Stahl sold 174,632 MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) shares for $7,145,941 on Mar 2, 2026
Date Insider Transaction Shares Price Value Filing
Mar 2, 2026 Murray Stahl S Open-market sale 53,578 held after: 4,619,442 $40.92 $2,192,412 SEC filing ↗
Mar 2, 2026 Murray Stahl S Open-market sale 121,054 held after: 4,689,466 $40.92 $4,953,530 SEC filing ↗

Total of the rows above: $7,145,941, in the currency the filings report.

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Murray Stahl bought 2,439 MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) shares for $99,999 on Dec 12, 2025

Large trade for this person

Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.

Murray Stahl bought 2,439 MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) shares for $99,999 on Dec 12, 2025
Date Insider Transaction Shares Price Value Filing
Dec 12, 2025 Murray Stahl P Open-market purchase 2,439 held after: 4,560,364 $41.00 $99,999 SEC filing ↗

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

7 insiders bought MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) shares worth $1,718,293 between Aug 13, 2025 and Aug 28, 2025

Cluster buying

7 different insiders made 7 open-market purchases of this company’s shares within a short window. Each row below is one reported trade.

7 insiders bought MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) shares worth $1,718,293 between Aug 13, 2025 and Aug 28, 2025
Date Insider Transaction Shares Price Value Filing
Aug 13, 2025 Paul Stahlin P Open-market purchase 1,000 held after: 1,000 $23.00 $23,000 SEC filing ↗
Aug 13, 2025 Thomas P Gallagher P Open-market purchase 12,000 held after: 12,000 $23.00 $276,000 SEC filing ↗
Aug 13, 2025 Harish Jayabalan P Open-market purchase 2,500 held after: 6,443 $23.00 $57,500 SEC filing ↗
Aug 13, 2025 Edward Deitzel P Open-market purchase 100 held after: 32,193 $23.00 $2,300 SEC filing ↗
Aug 13, 2025 John Smollen P Open-market purchase 5,000 held after: 7,226 $23.00 $115,000 SEC filing ↗
Aug 14, 2025 Lance Emmons P Open-market purchase 4 held after: 4 $31.44 $126 SEC filing ↗
Aug 28, 2025 Murray Stahl P Open-market purchase 34,470 held after: 4,557,919 $36.10 $1,244,367 SEC filing ↗

Total of the rows above: $1,718,293, in the currency the filings report.

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Murray Stahl bought 34,470 MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) shares for $1,244,367 on Aug 28, 2025

Large trade for this person

Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.

Murray Stahl bought 34,470 MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) shares for $1,244,367 on Aug 28, 2025
Date Insider Transaction Shares Price Value Filing
Aug 28, 2025 Murray Stahl P Open-market purchase 34,470 held after: 4,557,919 $36.10 $1,244,367 SEC filing ↗

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Reported transactions

Price 0.00 is a real reported figure on gifts (G) and share awards (A) — not a missing number. The 25 most recent rows are grouped into 4 lines by date, company and transaction type — open a line to see every lot with its own source link. We hold 4,565 on file in total. See the full history on EDGAR ↗

How to read this list

Every row is one line of one Form 4 or Form 5, with the filing it came from. Where the record carries no price at all we leave the cell empty instead of guessing one.

The shares and money on a grouped line add up only the lots listed inside that line, and only when every one of them carries the figure. Where a group mixes more than one reporting currency we leave the money blank rather than convert — no source publishes the rate that conversion would need.

  1. RENN Fund, Inc. RCG P Open-market purchase × 7 1,134 shares $3.7K
    The 7 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    82 $3.24 $266 SEC filing ↗
    18 $3.24 $58 SEC filing ↗
    296 $3.24 $959 SEC filing ↗
    180 $3.24 $583 SEC filing ↗
    180 $3.24 $583 SEC filing ↗
    18 $3.24 $58 SEC filing ↗
    360 $3.24 $1.2K SEC filing ↗
  2. RENN Fund, Inc. RCG P Open-market purchase × 7 1,134 shares $3.5K
    The 7 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    82 $3.05 $250 SEC filing ↗
    18 $3.05 $55 SEC filing ↗
    296 $3.05 $903 SEC filing ↗
    180 $3.05 $549 SEC filing ↗
    180 $3.05 $549 SEC filing ↗
    18 $3.05 $55 SEC filing ↗
    360 $3.05 $1.1K SEC filing ↗
  3. RENN Fund, Inc. RCG P Open-market purchase × 7 1,134 shares $3.7K
    The 7 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    82 $3.27 $268 SEC filing ↗
    18 $3.27 $59 SEC filing ↗
    296 $3.27 $968 SEC filing ↗
    180 $3.27 $589 SEC filing ↗
    180 $3.27 $589 SEC filing ↗
    18 $3.27 $59 SEC filing ↗
    360 $3.27 $1.2K SEC filing ↗
  4. RENN Fund, Inc. RCG P Open-market purchase × 4 576 shares $1.9K
    The 4 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    82 $3.25 $267 SEC filing ↗
    18 $3.25 $59 SEC filing ↗
    296 $3.25 $962 SEC filing ↗
    180 $3.25 $585 SEC filing ↗

Disclosed holdings

Shares is the amount on the form; value is that amount times the closing price shown. Rows with no closing price are left blank, so they may add up to less than the headline figure.

What is not counted here

Each row is one filing you can open. Private companies, real estate, bonds and crypto are not in SEC insider filings and are therefore not counted here.

Equity positions disclosed to the SEC, with the source filing behind each row.
Issuer Ticker Security Shares Close Value Form Reported Filing
Horizon Kinetics Holding Corp HKHC Common Stock (indirect) 9,303,730 $26.65 $247.9M 4 EDGAR ↗
MIAMI INTERNATIONAL HOLDINGS, INC. MIAX Common Stock (indirect) 4,633,842 $42.39 $196.4M 4 EDGAR ↗
Texas Pacific Land Corp TPL Common Stock 25,268 $362.42 $9.2M 4 EDGAR ↗
RENN Fund, Inc. RCG Common Stock (indirect) 1,070,986 $2.89 $3.1M 4 EDGAR ↗

Other insiders at the same companies

People who also file with the SEC at a company where Murray Stahl reports shares.

Sharing a filing does not mean they work together day to day — it means both names appear on the same issuer’s insider record.

Sources

The filings linked in the tables above are the sources for every figure on this page.

Think a number here is wrong? Open the linked filing and compare — how to report it.

Profile record last refreshed Sep 8, 2026.