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buyWeak cluster of 10

Paul Stahlin bought $23k of MIAX

director at MIAMI INTERNATIONAL HOLDINGS, INC.. 1,000 shares at an average of $23.00, traded Aug 13, 2025, filed Aug 15, 2025.

Conviction score
38
Value
$23k
1,000 shares
Holdings after
1,000
change unknown
From 52-week low
-
no price yet
From 52-week high
-
no price yet

Score components

  • Role
    Director
    +15
  • Trade size
    $23k at market
    0
  • Relative to holdings
    First purchase: no shares before this trade
    +8
  • Price context
    No price history yet
    0
  • Cluster
    10 insiders buying within 14 days
    +15
  • Repeat buying
    First buy in 90 days
    0
  • Track record
    Too few past buys to judge (0 with prices)
    0

What happened after comparable buys

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

MIAXOct 9, 2026 · close 30.71
Since filing Aug 15, 2025: -1.3%SPY +22.6% · excess -24.0%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001628280-25-040564, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Aug 13, 2025POpen-market purchase
Common Stock
+1,000$23.00$23k1,000Aug 15, 2025

Related signals

Other insiders at MIAMI INTERNATIONAL HOLDINGS, INC. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
5Weak
MIAXsell10b5-1
MIAMI INTERNATIONAL HOLDINGS, INC.
Douglas M. Schafer JR
EVP and CIO
$1.3M
40,000 shares
-9%
32Weak
MIAXsell 610b5-1
MIAMI INTERNATIONAL HOLDINGS, INC.
Shelly Brown
EVP, Chief Strategy Officer
$819k
21,217 shares
-6%
20Weak
MIAXsell 610b5-1
MIAMI INTERNATIONAL HOLDINGS, INC.
Barbara J. Comly
EVP, GC & Corporate Secretary
$1.8M
44,445 shares
-5%
12Weak
MIAXsell 610b5-1
MIAMI INTERNATIONAL HOLDINGS, INC.
Edward Deitzel
EVP, CRO, CCO MIAX Exchanges
$464k
11,000 shares
-8%
30Weak
MIAXsell 610b5-1
MIAMI INTERNATIONAL HOLDINGS, INC.
Thomas P. Gallagher
Chairman & CEO
$2.0M
47,000 shares
-3%
25Weak
MIAXsell 610b5-1
MIAMI INTERNATIONAL HOLDINGS, INC.
Judson Gray Teekell
director
$353k
8,545 shares
-10%
25Weak
MIAXsell 610b5-1
MIAMI INTERNATIONAL HOLDINGS, INC.
Douglas M. Schafer JR
EVP and CIO
$1.9M
48,000 shares
-11%
10Weak
MIAXsell 410b5-1
MIAMI INTERNATIONAL HOLDINGS, INC.
Judson Gray Teekell
director
$12k
300 shares
-0%
35Weak
MIAXsell 410b5-1
MIAMI INTERNATIONAL HOLDINGS, INC.
Shelly Brown
EVP, Chief Strategy Officer
$1.0M
25,932 shares
-8%
25Weak
MIAXsell 410b5-1
MIAMI INTERNATIONAL HOLDINGS, INC.
Kurt M. Eckert
director
$1.5M
37,917 shares
-21%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Paul Stahlin bought $23k of MIAX | InsiderTell