undamentalytics Newsletter

Interactive Brokers insider trading

Every open-market purchase and sale by Interactive Brokers's officers, directors and largest shareholders since November 4, 2021, and what the share price did next.

Insider purchase Insider sale Marker size reflects trade value. Weekly closes adjusted for splits; may be delayed.
Interactive Brokers insider open-market trades
DateInsiderTrade SharesPriceValue 1M after 3M after 6M after

From insiders' Form 4 filings with the SEC: open-market purchases and sales only (awards, option exercises and shares withheld for tax are excluded), combined to one line per insider per day. "Plan" marks trades the filing says were made under a pre-set Rule 10b5-1 trading plan, which are scheduled in advance. Price changes run from the close on the trade date; hover a figure for the change relative to the S&P 500. Past moves don't predict future ones.

Does following Interactive Brokers’s insiders pay?

From July 26, 2011 to October 29, 2026, 10 insiders reported 7 open-market purchases and 15 sales not made under a pre-set plan in Interactive Brokers. Twelve months after each purchase was reported, the shares were −6.9% against the S&P 500 on average (median −10.3%), over 7 purchases with a full year of prices; 29% beat the index. After sales, the shares moved +13.3% against the index over 12 months (a negative figure means selling was the right call). That rests on fewer than 20 purchases, too few to read much into. Buying each purchase the day after it was reported, an equal amount each, held 12 months or until that insider reported a sale, would have turned $10,000 on July 27, 2011 into $17,188 by November 2, 2026, +3.6% a year. It held shares 31% of the time; the S&P 500 on those same days, with Treasury bills otherwise, made $21,549 (+5.2% a year), and held throughout $75,604 (+14.2%).

$0$25.0k$50.0k$75.0k 20112013201520172019202120232025 $75.6k$21.5k$17.2k
Copying Interactive Brokers's insidersS&P 500, same days investedS&P 500, held throughout $10,000 copying every open-market purchase by Interactive Brokers's insiders from July 27, 2011, before costs and taxes, marked weekly. Uninvested money earns the Treasury bill rate; the portfolio held shares 31% of the time.
Interactive Brokers: each insider's record
InsiderRolePurchases12 months after their purchasesBeat the S&P 500Sales12 months after their salesLatest report
Harris Lawrence E Director 3 −15.3% (3) 0% 5 +2.6% (2) October 29, 2026
Nemser Earl H Vice Chairman 0 — — 4 −21.3% (2) January 28, 2026
Bright Jill Director 2 +9.6% (2) 100% 0 — October 27, 2025
Mendonca Denis Chief Accounting Officer 0 — — 2 +5.5% (2) October 22, 2021
Drew John 10% owner 0 — — 1 +50.4% (1) December 21, 2012
Echinus Advisors, LLC Director 0 — — 1 +35.0% (1) April 27, 2020
Galik Milan President 1 −13.8% (1) 0% 0 — September 21, 2018
Gates Richard J. Director 1 −7.9% (1) 0% 0 — July 25, 2012
Technology Crossover Management VII, Ltd. Other 0 — — 1 +50.4% (1) December 21, 2012
Uhde Philip Director 0 — — 1 +23.5% (1) April 24, 2023

Moves are the shares’ return including dividends minus the S&P 500’s, from the close on the first trading day after each report; the number of trades with a finished 12-month window is in brackets. Green means the trade went the insider’s way (a purchase ahead of the index, a sale followed by the shares trailing it). A trade reported both by a director or officer and by a fund or company they are linked to counts once here, under the person. Purchases count only where the share price actually traded was at least $5. These figures describe what the shares did, not why anyone traded. Insiders across all companies.

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