Skip to content
sellWeak10b5-1 plan

Earl H Nemser sold $3.4M of IBKR

Vice Chairman at Interactive Brokers Group, Inc.. 53,900 shares at an average of $64.00, traded Aug 14, 2025, filed Aug 15, 2025.

Warning score
30
Value
$3.4M
53,900 shares
Holdings after
400,000
-12% from before
From 52-week low
+109%
low $30.40, close $63.57
From 52-week high
-5%
high $67.26, as of Aug 14, 2025

Score components

  • Role
    Chair
    +20
  • Trade size
    $3.4M at market
    +25
  • Share of holdings sold
    Sold 12% of holdings
    +5
  • Cluster
    No other insider selling within 14 days
    0
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

What happened after comparable sells

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.

This signal so far: 1m +0.7%, 3m +4.4%, 6m +18.4%.

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.

IBKROct 12, 2026 · close 87.89
Since filing Aug 15, 2025: +39.6%SPY +22.6% · excess +17.0%

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 0001381197-25-000113, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Aug 14, 2025SOpen-market sale
Class A common stockindirect: by EN Holdings LLC10b5-1
-33,379$63.86$2.1M420,521Aug 15, 2025
Aug 14, 2025SOpen-market sale
Class A common stockindirect: by EN Holdings LLC10b5-1
-20,521$64.22$1.3M400,000Aug 15, 2025

Related signals

Other insiders at Interactive Brokers Group, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
0Weak
IBKRbuy10b5-1
Interactive Brokers Group, Inc.
Lori A Conkling
director
$2,136
25 shares
+1%
0Weak
IBKRbuy10b5-1
Interactive Brokers Group, Inc.
Lori A Conkling
director
$2,363
25 shares
+1%
0Weak
IBKRbuy10b5-1
Interactive Brokers Group, Inc.
Lori A Conkling
director
$2,176
25 shares
+1%
5Weak
IBKRbuy10b5-1
Interactive Brokers Group, Inc.
Lori A Conkling
director
$2,201
25 shares
+1%
5Weak
IBKRbuy10b5-1
Interactive Brokers Group, Inc.
Lori A Conkling
director
$2,153
25 shares
+1%
5Weak
IBKRbuy10b5-1
Interactive Brokers Group, Inc.
Lori A Conkling
director
$1,991
25 shares
+1%
45Moderate
IBKRsell
Interactive Brokers Group, Inc.
Lawrence E Harris
director
$2.0M
26,000 shares
-13%
5Weak
IBKRbuy10b5-1
Interactive Brokers Group, Inc.
Lori A Conkling
director
$1,710
25 shares
+1%
0Weak
IBKRbuy10b5-1
Interactive Brokers Group, Inc.
Lori A Conkling
director
$5,391
75 shares
+3%
65Notable
IBKRsell
Interactive Brokers Group, Inc.
Earl H Nemser
Vice Chairman
$12M
155,000 shares
-100%

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.

Earl H Nemser sold $3.4M of IBKR | InsiderTell