Updated Jul 16, 2026 · Last SEC filing 2026-07-01
Interactive Brokers Group, Inc. (IBKR) has filed 9 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-01. 2 Form 8-K material event filings were reported by IBKR in the last 90 days. 1 Form 144 notices of proposed sale were filed for IBKR stock. InsiderAlpha tracks every IBKR SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Security Brokers, Dealers & Flotation Companies (SIC 6211) |
|---|---|
| SEC CIK | 0001381197 |
| Form 4 filings (90d) | 9 |
|---|---|
| Form 8-K filings (90d) | 2 |
| Form 144 notices (90d) | 1 |
| Latest Form 4 filing | 2026-07-01 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Conkling Lori A | Insider | P — Open-market purchase | 25 | $88.03 | $2K | SEC | |
| Conkling Lori A | Insider | P — Open-market purchase | 25 | $86.10 | $2K | SEC | |
| Galik Milan | Chief Executive Officer | F — Tax withholding / forfeiture | 255.0K | $84.42 | $21.53M | SEC | |
| Brody Paul Jonathan | Chief Financial Officer | F — Tax withholding / forfeiture | 82.9K | $84.42 | $7.00M | SEC | |
| Frank Thomas AJ | Executive Vice President | F — Tax withholding / forfeiture | 31.7K | $84.42 | $2.68M | SEC | |
| Nemser Earl H | Vice Chairman | F — Tax withholding / forfeiture | 22.5K | $84.42 | $1.90M | SEC | |
| Mendonca Denis | Chief Accounting Officer | F — Tax withholding / forfeiture | 11.2K | $84.42 | $942K | SEC | |
| Conkling Lori A | Insider | P — Open-market purchase | 25 | $79.64 | $2K | SEC | |
| Harris Lawrence E | Insider | S — Open-market sale | 26.0K | $76.93 | $2.00M | SEC | |
| Conkling Lori A | Insider | P — Open-market purchase | 25 | $68.38 | $2K | SEC | |
| Conkling Lori A | Insider | P — Open-market purchase [10b5-1] | 25 | $69.21 | $2K | SEC | |
| Conkling Lori A | Insider | P — Open-market purchase [10b5-1] | 50 | $73.21 | $4K | SEC | |
| Nemser Earl H | Vice Chairman | S — Open-market sale | 39.7K | $75.07 | $2.98M | SEC | |
| Nemser Earl H | Vice Chairman | S — Open-market sale | 20.5K | $75.75 | $1.55M | SEC | |
| Nemser Earl H | Vice Chairman | S — Open-market sale | 3.1K | $77.98 | $242K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Interactive Brokers Group, Inc. (IBKR). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Conkling Lori A | 3 | $6K |
| Nemser Earl H | 1 | $1.90M |
| Galik Milan | 1 | $21.53M |
| Brody Paul Jonathan | 1 | $7.00M |
| Frank Thomas AJ | 1 | $2.68M |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in IBKR insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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