Company / CIK 0001381197
Interactive Brokers Group, Inc.
- Ticker
- IBKR
- Size, estimated from filings
- Large cap ($10B – $200B)
- Insiders on file
- 11
- Members of Congress who traded it
- 1
- Federal contracts on record
- none matched
- Lobbying filings on record
- none matched
- SEC filings
- EDGAR ↗
- Latest trade on record
- October 1, 2026
Interactive Brokers Group, Inc. (IBKR) has 11 insiders on file who disclosed 56 transactions in the last 12 months (10 open-market buys, 19 sales, about $141.7M at reported prices), and 1 congressional trade in its stock is on record. No federal contract award that started in the last 180 days was found for a recipient with exactly this name; no lobbying filing names it as client this year.
Interactive Brokers Group, Inc. in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
7 people account for the disclosed buying and selling in Interactive Brokers Group, Inc. over the last 12 months; the most active is Nemser Earl H with $33M.
Insiders
| Name | Role | Rows | Bought | Sold | Last filed |
|---|---|---|---|---|---|
| Conkling Lori A | Director | 13 | 9 | 0 | October 5, 2026 |
| Nemser Earl H | Vice Chairman | 13 | 0 | 9 | August 4, 2026 |
| Brody Paul Jonathan | Chief Financial Officer | 9 | 0 | 6 | May 28, 2026 |
| Galik Milan | Chief Executive Officer | 5 | 0 | 1 | May 28, 2026 |
| Mendonca Denis | Chief Accounting Officer | 2 | 0 | 1 | May 28, 2026 |
| Frank Thomas AJ | Executive Vice President | 2 | 0 | 1 | May 28, 2026 |
| Repetto Richard H | Director | 2 | 0 | 0 | May 20, 2026 |
| Harris Lawrence E | Director | 8 | 0 | 6 | April 29, 2026 |
| Bright Jill | Director | 3 | 1 | 0 | January 26, 2026 |
| Yuen Nicole | Director | 2 | 0 | 0 | January 26, 2026 |
| Peterffy William | Director | 2 | 0 | 0 | January 26, 2026 |
Rows are this company's Form 4 rows for each person. "Bought" and "sold" count open-market purchases (code P) and sales only. More in insider buying and insider selling.
Members of Congress who traded IBKR
From periodic transaction reports that name the company's stock. Amounts are the sums of the ranges as filed. Every row is on the IBKR page.
| Member | Seat | Trades | Bought | Sold | Range as filed | Latest |
|---|---|---|---|---|---|---|
| Lisa C. McClain | Representative (MI, District 9), Republican | 1 | 0 | 1 | $1,001–$15K | October 14, 2025 |
Insider transactions
| Filer | Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Conkling Lori A | IBKR | Buy P | October 1, 2026 | October 5, 2026 | 4d | 25 | $85 | $2,136 | 10b5-1 plan | Form 4 ↗ | |
| Conkling Lori A | IBKR | Buy P | September 1, 2026 | September 2, 2026 | 1d | 25 | $95 | $2,363 | 10b5-1 plan | Form 4 ↗ | |
| Nemser Earl H | IBKR | Other A | July 31, 2026 | August 4, 2026 | 4d | 803,568 | $88 | $70.7M | indirect | Form 4 ↗ | |
| Conkling Lori A | IBKR | Buy P | August 3, 2026 | August 4, 2026 | 1d | 25 | $87 | $2,176 | 10b5-1 plan | Form 4 ↗ | |
| Conkling Lori A | IBKR | Buy P | July 1, 2026 | July 1, 2026 | 0d | 25 | $88 | $2,201 | 10b5-1 plan | Form 4 ↗ | |
| Conkling Lori A | IBKR | Buy P | June 1, 2026 | June 2, 2026 | 1d | 25 | $86 | $2,153 | 10b5-1 plan | Form 4 ↗ | |
| Brody Paul Jonathan | IBKR | Sell F | May 8, 2026 | May 28, 2026 | 20d | 82,920 | $84 | $7.0M | late | Form 4 ↗ | |
| Mendonca Denis | IBKR | Sell F | May 8, 2026 | May 28, 2026 | 20d | 11,157 | $84 | $942K | late | Form 4 ↗ | |
| Galik Milan | IBKR | Sell F | May 8, 2026 | May 28, 2026 | 20d | 255,039 | $84 | $21.5M | late | Form 4 ↗ | |
| Frank Thomas AJ | IBKR | Sell F | May 8, 2026 | May 28, 2026 | 20d | 31,730 | $84 | $2.7M | late | Form 4 ↗ | |
| Nemser Earl H | IBKR | Sell F | May 8, 2026 | May 28, 2026 | 20d | 22,486 | $84 | $1.9M | late | Form 4 ↗ | |
| Conkling Lori A | IBKR | Buy P | May 1, 2026 | May 4, 2026 | 3d | 25 | $80 | $1,991 | 10b5-1 plan | Form 4 ↗ | |
| Harris Lawrence E | IBKR | Sell S | April 28, 2026 | April 29, 2026 | 1d | 26,000 | $77 | $2.0M | Form 4 ↗ | ||
| Conkling Lori A | IBKR | Buy P | April 1, 2026 | April 2, 2026 | 1d | 25 | $68 | $1,710 | 10b5-1 plan | Form 4 ↗ | |
| Conkling Lori A | IBKR | Buy P | March 2, 2026 | March 26, 2026 | 24d | 25 | $69 | $1,730 | late10b5-1 plan | Form 4 ↗ | |
| Conkling Lori A | IBKR | Buy P | February 25, 2026 | March 26, 2026 | 29d | 50 | $73 | $3,660 | late10b5-1 plan | Form 4 ↗ | |
| Nemser Earl H | IBKR | Sell S | January 27, 2026 | January 28, 2026 | 1d | 20,469 | $76 | $1.6M | indirect | Form 4 ↗ | |
| Nemser Earl H | IBKR | Sell S | January 27, 2026 | January 28, 2026 | 1d | 39,731 | $75 | $3.0M | indirect | Form 4 ↗ | |
| Nemser Earl H | IBKR | Sell S | January 26, 2026 | January 28, 2026 | 2d | 3,101 | $78 | $242K | indirect | Form 4 ↗ | |
| Nemser Earl H | IBKR | Sell S | January 26, 2026 | January 28, 2026 | 2d | 30,817 | $77 | $2.4M | indirect | Form 4 ↗ | |
| Nemser Earl H | IBKR | Sell S | January 26, 2026 | January 28, 2026 | 2d | 60,882 | $76 | $4.6M | indirect | Form 4 ↗ | |
| Nemser Earl H | IBKR | Sell S | January 23, 2026 | January 26, 2026 | 3d | 60,065 | $78 | $4.7M | indirect | Form 4 ↗ | |
| Nemser Earl H | IBKR | Sell S | January 23, 2026 | January 26, 2026 | 3d | 84,935 | $78 | $6.6M | indirect | Form 4 ↗ | |
| Nemser Earl H | IBKR | Sell S | January 22, 2026 | January 26, 2026 | 4d | 100,000 | $77 | $7.7M | indirect | Form 4 ↗ | |
| Peterffy William | IBKR | Other A | January 1, 2026 | January 26, 2026 | 25d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Nemser Earl H | IBKR | Other A | January 1, 2026 | January 26, 2026 | 25d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Brody Paul Jonathan | IBKR | Other A | January 1, 2026 | January 26, 2026 | 25d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Galik Milan | IBKR | Other A | January 1, 2026 | January 26, 2026 | 25d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Harris Lawrence E | IBKR | Other A | January 1, 2026 | January 26, 2026 | 25d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Conkling Lori A | IBKR | Other A | January 1, 2026 | January 26, 2026 | 25d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Conkling Lori A | IBKR | Other A | December 31, 2025 | January 26, 2026 | 26d | 389 | — | — | late | Form 4 ↗ | |
| Bright Jill | IBKR | Other A | January 1, 2026 | January 26, 2026 | 25d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Yuen Nicole | IBKR | Other A | January 1, 2026 | January 26, 2026 | 25d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Repetto Richard H | IBKR | Other A | January 1, 2026 | January 26, 2026 | 25d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Brody Paul Jonathan | IBKR | Other A | December 31, 2025 | January 7, 2026 | 7d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Brody Paul Jonathan | IBKR | Other A | December 31, 2025 | January 7, 2026 | 7d | 53,452 | — | — | late | Form 4 ↗ | |
| Harris Lawrence E | IBKR | Other A | December 31, 2025 | January 7, 2026 | 7d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Bright Jill | IBKR | Other A | December 31, 2025 | January 7, 2026 | 7d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Galik Milan | IBKR | Other A | December 31, 2025 | January 7, 2026 | 7d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Galik Milan | IBKR | Other A | December 31, 2025 | January 7, 2026 | 7d | 224,650 | — | — | late | Form 4 ↗ | |
| Repetto Richard H | IBKR | Other A | December 31, 2025 | January 7, 2026 | 7d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Frank Thomas AJ | IBKR | Other A | December 31, 2025 | January 7, 2026 | 7d | 13,944 | — | — | late | Form 4 ↗ | |
| Nemser Earl H | IBKR | Other A | December 31, 2025 | January 7, 2026 | 7d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Nemser Earl H | IBKR | Other A | December 31, 2025 | January 7, 2026 | 7d | 23,240 | — | — | late | Form 4 ↗ | |
| Conkling Lori A | IBKR | Other A | December 31, 2025 | January 7, 2026 | 7d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Conkling Lori A | IBKR | Other A | December 31, 2025 | January 7, 2026 | 7d | 1,167 | — | — | late | Form 4 ↗ | |
| Mendonca Denis | IBKR | Other A | December 31, 2025 | January 7, 2026 | 7d | 11,156 | — | — | late | Form 4 ↗ | |
| Peterffy William | IBKR | Other A | December 31, 2025 | January 7, 2026 | 7d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Yuen Nicole | IBKR | Other A | December 31, 2025 | January 7, 2026 | 7d | 389 | $64 | $25K | late | Form 4 ↗ | |
| Galik Milan | IBKR | Other J | December 29, 2025 | December 30, 2025 | 1d | 895,688 | — | — | indirect | Form 4 ↗ | |
| Harris Lawrence E | IBKR | Sell S | October 29, 2025 | October 31, 2025 | 2d | 10,645 | $69 | $735K | Form 4 ↗ | ||
| Harris Lawrence E | IBKR | Sell S | October 28, 2025 | October 29, 2025 | 1d | 6,855 | $69 | $474K | Form 4 ↗ | ||
| Harris Lawrence E | IBKR | Sell S | October 27, 2025 | October 29, 2025 | 2d | 7,500 | $70 | $523K | Form 4 ↗ | ||
| Bright Jill | IBKR | Buy P | October 23, 2025 | October 27, 2025 | 4d | 400 | $66 | $26K | Form 4 ↗ | ||
| Harris Lawrence E | IBKR | Sell S | October 24, 2025 | October 27, 2025 | 3d | 8,000 | $69 | $548K | Form 4 ↗ | ||
| Harris Lawrence E | IBKR | Sell S | October 23, 2025 | October 27, 2025 | 4d | 22,000 | $68 | $1.5M | Form 4 ↗ | ||
| Brody Paul Jonathan | IBKR | Sell S | September 30, 2025 | October 1, 2025 | 1d | 1,155 | $70 | $81K | 10b5-1 planindirect | Form 4 ↗ | |
| Brody Paul Jonathan | IBKR | Sell S | September 30, 2025 | October 1, 2025 | 1d | 1,979 | $69 | $137K | 10b5-1 planindirect | Form 4 ↗ | |
| Brody Paul Jonathan | IBKR | Sell S | September 29, 2025 | October 1, 2025 | 2d | 2,021 | $69 | $139K | 10b5-1 planindirect | Form 4 ↗ | |
| Brody Paul Jonathan | IBKR | Sell S | September 29, 2025 | October 1, 2025 | 2d | 8,792 | $68 | $600K | 10b5-1 planindirect | Form 4 ↗ | |
| Brody Paul Jonathan | IBKR | Sell S | September 29, 2025 | October 1, 2025 | 2d | 7,414 | $67 | $498K | 10b5-1 planindirect | Form 4 ↗ |
Federal contracts (USAspending, awards started in the last 180 days)
No contract award starting in the last 180 days was found for a recipient named exactly "Interactive Brokers Group, Inc.". Subsidiaries and differently-spelled recipients are not matched — search contracts.
Lobbying (Senate LDA, as client)
No LDA filing posted since October 2025 names "Interactive Brokers Group, Inc." as the client. Filings under a subsidiary or trade-association name are not matched — search lobbying.
Related companies
Companies whose stock was traded by the same people who traded IBKR, by number of filers in common. It shows overlap in public filings and nothing else.
- UNITED THERAPEUTICS Corp UTHR 1 filer in common
- Dell Technologies Inc. DELL 1 filer in common
- Seagate Technology Holdings plc STX 1 filer in common
- Uber Technologies, Inc UBER 1 filer in common
- Datadog, Inc. DDOG 1 filer in common
- Arista Networks, Inc. ANET 1 filer in common
- Meta Platforms, Inc. META 1 filer in common
- Albertsons Companies, Inc. ACI 1 filer in common
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| House Clerk, periodic transaction reports | 1 | 1 | November 21, 2025 | November 21, 2025 | House Clerk search |
| SEC EDGAR, Form 4 | 43 | 61 | October 1, 2025 | October 5, 2026 | Form 4 list on EDGAR |
Site built October 27, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Insiders and their transactions come from SEC EDGAR Form 4 filings for this issuer. Contracts and lobbying are matched by exact normalized name (suffixes like Inc./Corp. ignored) to USAspending recipients and LDA clients — a conservative match that misses subsidiaries on purpose. See methodology and corrections.
Not investment advice. Public records shown as filed; no recommendation is made or implied.