As of the latest Form 4 filed Jul 1, 2026.
What Interactive Brokers Group Inc insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 29 most recent filings for IBKR.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-07-01 | 2026-07-01 | Conkling Lori A Director | PPurchase | +25.00 | $88.03 | $2.20K | Yes (planned) | Form 4 ↗ |
| 2026-06-02 | 2026-06-01 | Conkling Lori A Director | PPurchase | +25.00 | $86.10 | $2.15K | Yes (planned) | Form 4 ↗ |
| 2026-05-28 | 2026-05-08 | Brody Paul Jonathan Chief Financial Officer | FTax | −82.9K | $84.42 | $7.00M | No | Form 4 ↗ |
| 2026-05-28 | 2026-05-08 | Mendonca Denis Chief Accounting Officer | FTax | −11.2K | $84.42 | $942K | No | Form 4 ↗ |
| 2026-05-28 | 2026-05-08 | Galik Milan Chief Executive Officer | FTax | −255K | $84.42 | $21.5M | No | Form 4 ↗ |
| 2026-05-28 | 2026-05-08 | Frank Thomas AJ Executive Vice President | FTax | −31.7K | $84.42 | $2.68M | No | Form 4 ↗ |
| 2026-05-28 | 2026-05-08 | Nemser Earl H Vice Chairman | FTax | −22.5K | $84.42 | $1.90M | No | Form 4 ↗ |
| 2026-05-04 | 2026-05-01 | Conkling Lori A Director | PPurchase | +25.00 | $79.64 | $1.99K | Yes (planned) | Form 4 ↗ |
| 2026-04-29 | 2026-04-28 | Harris Lawrence E Director | SSale | −26.0K | $76.93 | $2.00M | No | Form 4 ↗ |
| 2026-03-26 | 2026-03-02 | Conkling Lori A Director | PPurchase | +25.00 | $69.21 | $1.73K | Yes (planned) | Form 4 ↗ |
| 2026-03-26 | 2026-02-25 | Conkling Lori A, Director | PPurchase | +50.00 | $73.21 | $3.66K | Yes (planned) | Form 4 ↗ |
| 2026-01-28 | 2026-01-27 | Nemser Earl H Vice Chairman | SSale | −20.5K | $75.75 | $1.55M | No | Form 4 ↗ |
| 2026-01-28 | 2026-01-27 | Nemser Earl H, Vice Chairman | SSale | −39.7K | $75.07 | $2.98M | No | Form 4 ↗ |
| 2026-01-28 | 2026-01-26 | Nemser Earl H, Vice Chairman | SSale | −3.10K | $77.98 | $242K | No | Form 4 ↗ |
| 2026-01-28 | 2026-01-26 | Nemser Earl H, Vice Chairman | SSale | −30.8K | $76.72 | $2.36M | No | Form 4 ↗ |
| 2026-01-28 | 2026-01-26 | Nemser Earl H, Vice Chairman | SSale | −60.9K | $75.83 | $4.62M | No | Form 4 ↗ |
| 2026-01-26 | 2026-01-23 | Nemser Earl H Vice Chairman | SSale | −60.1K | $78.14 | $4.69M | No | Form 4 ↗ |
| 2026-01-26 | 2026-01-23 | Nemser Earl H, Vice Chairman | SSale | −84.9K | $77.65 | $6.60M | No | Form 4 ↗ |
| 2026-01-26 | 2026-01-22 | Nemser Earl H, Vice Chairman | SSale | −100K | $76.81 | $7.68M | No | Form 4 ↗ |
| 2026-01-26 | 2026-01-01 | Peterffy William Director | AAward | +389.00 | $64.31 | $25.0K | No | Form 4 ↗ |
| 2026-01-26 | 2026-01-01 | Nemser Earl H Vice Chairman | AAward | +389.00 | $64.31 | $25.0K | No | Form 4 ↗ |
| 2026-01-26 | 2026-01-01 | Brody Paul Jonathan Chief Financial Officer | AAward | +389.00 | $64.31 | $25.0K | No | Form 4 ↗ |
| 2026-01-26 | 2026-01-01 | Galik Milan Chief Executive Officer | AAward | +389.00 | $64.31 | $25.0K | No | Form 4 ↗ |
| 2026-01-26 | 2026-01-01 | Harris Lawrence E Director | AAward | +389.00 | $64.31 | $25.0K | No | Form 4 ↗ |
| 2026-01-26 | 2026-01-01 | Conkling Lori A Director | AAward | +389.00 | $64.31 | $25.0K | No | Form 4 ↗ |
| 2026-01-26 | 2026-01-01 | Bright Jill Director | AAward | +389.00 | $64.31 | $25.0K | No | Form 4 ↗ |
| 2026-01-26 | 2026-01-01 | Yuen Nicole Director | AAward | +389.00 | $64.31 | $25.0K | No | Form 4 ↗ |
| 2026-01-26 | 2026-01-01 | Repetto Richard H Director | AAward | +389.00 | $64.31 | $25.0K | No | Form 4 ↗ |
| 2026-01-26 | 2025-12-31 | Conkling Lori A Director | AAward | +389.00 | $0.00 | $0.00 | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also IBKR’s full analysis or the market-wide insider trading feed. The tabs above jump to IBKR’s other SEC data.
Source: SEC Form 4 filings for IBKR, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.