Interactive Brokers Group, Inc.
IBKR · Security Brokers, Dealers & Flotation Companies · 42.2M shares · +53%/yr ↑ dilution · EDGAR filings ↗
Net buyback after stock comp: -$99M (gross $866K, SBC $100M)
Reference price $86.10 · est. market cap ~$3.6B — last insider purchase, 2026-06-01 (estimated from the dated SEC Form 4 price × shares outstanding — not a live quote)
Grade
A88Dominant, technology-driven global automated broker compounding earnings with top-decile returns and margins.
Strengths
- Net margin 178% and ROE 81% (both ~100th pct), with net income up 28% and revenue up 4.8%
- Lowest-cost automated platform, S&P 500 inclusion, scale across 170+ venues — a durable tech/cost moat
Risks
- Trading-volume and interest-rate sensitivity make revenue inherently cyclical
- Founder voting control and structural complexity (26.3% of IBG LLC) create governance/dilution overhang
Notable findings
- Restatement• Certain provisions in our amended and restated certificate of incorporation may prevent efforts by our stockholders to change our direction or management 8-K ↗
- Customer concentration~50% of revenue from one customer/distributor — We pay customers a rebate on the cash collateral generally equal to 50% of a market-based rate for lending the shares
- Chronic dilutionShare count +53%/yr over 4y (dilution, book value/share -59%)
- Strong balance sheetStrong balance sheet — $5.0B cash & investments
- Insider sellingInsider selling — 9 open-market sale(s) by 2 insider(s) (cluster of 2 insiders, ~$33M, last 6mo) Form 4 ↗
Quarterly revenue
Last 4 quarters · from SEC filings.
Key metrics
Net margin
70.2%
Return on equity
81.2%
Return on assets
2.1%
Revenue growth (QoQ)
1.6%
Net-income growth
27.9%
Tangible book value
$5.3B
Cash & investments
$5.0B
Stock comp / revenue
1.9%
Insider transactions · last 18 months
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| 2026-06-01 | Conkling Lori A | Buy | 25 | $86.10 |
| 2026-05-08 | Galik Milan | Tax withheld | 255K | $84.42 |
| 2026-05-08 | Frank Thomas AJ | Tax withheld | 32K | $84.42 |
| 2026-05-08 | Nemser Earl H | Tax withheld | 22K | $84.42 |
| 2026-05-08 | Mendonca Denis | Tax withheld | 11K | $84.42 |
| 2026-05-08 | Brody Paul Jonathan | Tax withheld | 83K | $84.42 |
| 2026-05-01 | Conkling Lori A | Buy | 25 | $79.64 |
| 2026-04-28 | Harris Lawrence E | Sell | 26K | $76.93 |
| 2026-04-01 | Conkling Lori A | Buy | 25 | $68.38 |
| 2026-03-02 | Conkling Lori A | Buy | 25 | $69.21 |
| 2026-02-25 | Conkling Lori A | Buy | 50 | $73.21 |
| 2026-01-27 | Nemser Earl H | Sell | 40K | $75.07 |
| 2026-01-27 | Nemser Earl H | Sell | 20K | $75.75 |
| 2026-01-26 | Nemser Earl H | Sell | 3.1K | $77.98 |
| 2026-01-26 | Nemser Earl H | Sell | 61K | $75.83 |
| 2026-01-26 | Nemser Earl H | Sell | 31K | $76.72 |
| 2026-01-23 | Nemser Earl H | Sell | 85K | $77.65 |
| 2026-01-23 | Nemser Earl H | Sell | 60K | $78.14 |
| 2026-01-22 | Nemser Earl H | Sell | 100K | $76.81 |
| 2026-01-01 | Yuen Nicole | Grant | 389 | $64.31 |
| 2026-01-01 | Peterffy William | Grant | 389 | $64.31 |
| 2026-01-01 | Nemser Earl H | Grant | 389 | $64.31 |
| 2026-01-01 | Brody Paul Jonathan | Grant | 389 | $64.31 |
| 2026-01-01 | Galik Milan | Grant | 389 | $64.31 |
| 2026-01-01 | Harris Lawrence E | Grant | 389 | $64.31 |
| 2026-01-01 | Conkling Lori A | Grant | 389 | $64.31 |
| 2026-01-01 | Bright Jill | Grant | 389 | $64.31 |
| 2026-01-01 | Repetto Richard H | Grant | 389 | $64.31 |
| 2025-12-31 | Harris Lawrence E | Grant | 389 | $64.31 |
| 2025-12-31 | Conkling Lori A | Grant | 389 | — |
| 2025-12-31 | Brody Paul Jonathan | Grant | 53K | — |
| 2025-12-31 | Brody Paul Jonathan | Grant | 389 | $64.31 |
| 2025-12-31 | Repetto Richard H | Grant | 389 | $64.31 |
| 2025-12-31 | Nemser Earl H | Grant | 23K | — |
| 2025-12-31 | Nemser Earl H | Grant | 389 | $64.31 |
| 2025-12-31 | Mendonca Denis | Grant | 11K | — |
| 2025-12-31 | Yuen Nicole | Grant | 389 | $64.31 |
| 2025-12-31 | Bright Jill | Grant | 389 | $64.31 |
| 2025-12-31 | Galik Milan | Grant | 225K | — |
| 2025-12-31 | Galik Milan | Grant | 389 | $64.31 |
| 2025-12-31 | Conkling Lori A | Grant | 1.2K | — |
| 2025-12-31 | Conkling Lori A | Grant | 389 | $64.31 |
| 2025-12-31 | Frank Thomas AJ | Grant | 14K | — |
| 2025-12-31 | Peterffy William | Grant | 389 | $64.31 |
| 2025-12-29 | Galik Milan | Other | 896K | — |
| 2025-10-29 | Harris Lawrence E | Sell | 11K | $69.00 |
| 2025-10-28 | Harris Lawrence E | Sell | 6.9K | $69.15 |
| 2025-10-27 | Harris Lawrence E | Sell | 7.5K | $69.73 |
| 2025-10-24 | Harris Lawrence E | Sell | 8.0K | $68.50 |
| 2025-10-23 | Harris Lawrence E | Sell | 22K | $67.63 |
| 2025-10-23 | Bright Jill | Buy | 400 | $65.95 |
| 2025-09-30 | Brody Paul Jonathan | Sell | 2.0K | $69.30 |
| 2025-09-30 | Brody Paul Jonathan | Sell | 1.2K | $70.00 |
| 2025-09-29 | Brody Paul Jonathan | Sell | 7.4K | $67.16 |
| 2025-09-29 | Brody Paul Jonathan | Sell | 8.8K | $68.27 |
| 2025-09-29 | Brody Paul Jonathan | Sell | 2.0K | $68.70 |
| 2025-09-26 | Brody Paul Jonathan | Sell | 15K | $65.74 |
| 2025-09-26 | Brody Paul Jonathan | Sell | 1.6K | $66.15 |
| 2025-09-25 | Brody Paul Jonathan | Sell | 8.9K | $64.76 |
| 2025-09-25 | Brody Paul Jonathan | Sell | 1.2K | $63.81 |
| 2025-09-25 | Brody Paul Jonathan | Sell | 4.2K | $65.19 |
| 2025-09-24 | Brody Paul Jonathan | Sell | 13K | $64.76 |
| 2025-09-24 | Brody Paul Jonathan | Sell | 927 | $65.54 |
| 2025-09-23 | Brody Paul Jonathan | Sell | 13K | $65.49 |
| 2025-09-23 | Brody Paul Jonathan | Sell | 6.2K | $64.90 |
| 2025-09-22 | Brody Paul Jonathan | Sell | 15K | $63.94 |
| 2025-09-22 | Brody Paul Jonathan | Sell | 563 | $64.61 |
| 2025-09-19 | Brody Paul Jonathan | Sell | 6.9K | $64.66 |
| 2025-09-19 | Brody Paul Jonathan | Sell | 51K | $64.61 |
| 2025-09-19 | Brody Paul Jonathan | Sell | 140 | $65.19 |
| 2025-09-18 | Brody Paul Jonathan | Sell | 38K | $64.40 |
| 2025-09-18 | Brody Paul Jonathan | Sell | 71K | $65.05 |
| 2025-09-18 | Brody Paul Jonathan | Sell | 7.9K | $63.43 |
| 2025-09-17 | Brody Paul Jonathan | Sell | 45K | $62.48 |
| 2025-09-17 | Brody Paul Jonathan | Sell | 62K | $62.06 |
| 2025-09-16 | Brody Paul Jonathan | Sell | 99K | $62.24 |
| 2025-09-16 | Brody Paul Jonathan | Sell | 587 | $62.62 |
| 2025-09-15 | Brody Paul Jonathan | Sell | 38K | $63.79 |
| 2025-09-15 | Brody Paul Jonathan | Sell | 57K | $62.66 |
| 2025-09-15 | Brody Paul Jonathan | Sell | 1.5K | $64.26 |
| 2025-09-12 | Brody Paul Jonathan | Sell | 36K | $63.84 |
| 2025-09-12 | Brody Paul Jonathan | Sell | 62K | $64.19 |
| 2025-09-11 | Brody Paul Jonathan | Sell | 58K | $62.94 |
| 2025-09-11 | Brody Paul Jonathan | Sell | 55K | $63.54 |
| 2025-09-10 | Brody Paul Jonathan | Sell | 105K | $62.51 |
| 2025-09-09 | Brody Paul Jonathan | Sell | 85K | $62.02 |
| 2025-09-09 | Brody Paul Jonathan | Sell | 23K | $61.30 |
| 2025-08-14 | Nemser Earl H | Sell | 33K | $63.86 |
| 2025-08-14 | Nemser Earl H | Sell | 21K | $64.22 |
| 2025-08-13 | Nemser Earl H | Sell | 200 | $66.09 |
| 2025-08-13 | Nemser Earl H | Sell | 200 | $67.20 |
| 2025-08-13 | Nemser Earl H | Sell | 4.6K | $63.75 |
| 2025-08-13 | Nemser Earl H | Sell | 200 | $64.19 |
| 2025-08-13 | Nemser Earl H | Sell | 2.4K | $66.77 |
| 2025-08-12 | Nemser Earl H | Sell | 41K | $67.88 |
| 2025-08-12 | Nemser Earl H | Sell | 153K | $67.39 |
| 2025-08-11 | Nemser Earl H | Sell | 13K | $66.09 |
| 2025-08-08 | Nemser Earl H | Sell | 10K | $65.60 |
| 2025-08-08 | Nemser Earl H | Sell | 2.6K | $65.94 |
| 2025-08-07 | Nemser Earl H | Sell | 12K | $63.94 |
| 2025-08-07 | Nemser Earl H | Sell | 441 | $64.35 |
| 2025-08-06 | Nemser Earl H | Sell | 13K | $63.47 |
| 2025-08-06 | Nemser Earl H | Sell | 200 | $64.16 |
| 2025-08-05 | Nemser Earl H | Sell | 1.8K | $64.84 |
| 2025-08-05 | Nemser Earl H | Sell | 11K | $63.64 |
| 2025-08-04 | Nemser Earl H | Sell | 13K | $64.54 |
| 2025-08-01 | Nemser Earl H | Sell | 7.4K | $63.94 |
| 2025-08-01 | Nemser Earl H | Sell | 1.2K | $62.79 |
| 2025-08-01 | Nemser Earl H | Sell | 3.2K | $64.71 |
| 2025-08-01 | Nemser Earl H | Sell | 1.0K | $65.66 |
| 2025-07-31 | Nemser Earl H | Sell | 12K | $66.18 |
| 2025-07-31 | Nemser Earl H | Sell | 2.2K | $66.71 |
| 2025-07-30 | Nemser Earl H | Sell | 32K | $66.32 |
| 2025-07-30 | Nemser Earl H | Sell | 7.4K | $66.64 |
| 2025-07-30 | Brody Paul Jonathan | Grant | 1.0M | $66.22 |
| 2025-07-30 | Nemser Earl H | Grant | 400K | $66.22 |
| 2025-07-28 | Nemser Earl H | Sell | 100 | $65.90 |
| 2025-06-23 | Nemser Earl H | Gift | 500 | — |
| 2025-05-09 | Nemser Earl H | Tax withheld | 5.2K | $185.60 |
| 2025-05-09 | Brody Paul Jonathan | Tax withheld | 22K | $185.60 |
| 2025-05-09 | Mendonca Denis | Tax withheld | 2.5K | $185.60 |
| 2025-05-09 | Frank Thomas AJ | Tax withheld | 8.2K | $185.60 |
| 2025-05-09 | Nemser Earl H | Tax withheld | 5.2K | $185.60 |
| 2025-05-09 | Galik Milan | Tax withheld | 64K | $185.60 |
| 2025-02-20 | Peterffy Thomas | Gift | 6.4K | — |
| 2025-02-18 | Peterffy Thomas | Gift | 4.9K | — |
| 2025-02-18 | Peterffy Thomas | Gift | 85K | — |
| 2025-01-31 | Bright Jill | Buy | 135 | $219.51 |
| 2024-12-31 | Peterffy William | Grant | 142 | $176.67 |
| 2024-12-31 | Frank Thomas AJ | Grant | 6.7K | — |
| 2024-12-31 | Repetto Richard H | Grant | 425 | — |
| 2024-12-31 | Repetto Richard H | Grant | 142 | $176.67 |
| 2024-12-31 | Harris Lawrence E | Grant | 142 | $176.67 |
| 2024-12-31 | Galik Milan | Grant | 69K | — |
| 2024-12-31 | Galik Milan | Grant | 142 | $176.67 |
| 2024-12-31 | Nemser Earl H | Grant | 7.8K | — |
| 2024-12-31 | Nemser Earl H | Grant | 142 | $176.67 |
| 2024-12-31 | Yuen Nicole | Grant | 142 | $176.67 |
| 2024-12-31 | Bright Jill | Grant | 142 | $176.67 |
| 2024-12-31 | Brody Paul Jonathan | Grant | 18K | — |
| 2024-12-31 | Mendonca Denis | Grant | 3.7K | — |
| 2024-12-31 | Brody Paul Jonathan | Grant | 142 | $176.67 |
| 2024-12-31 | Galik Milan | Gift | 224K | — |
All non-derivative Form 4 activity (SEC), newest first.
Notable events (8-K)
Recent filings
| Form | Filed | Period | Accession |
|---|---|---|---|
| 10-Q | 2026-05-07 | 2026-03-31 | 0001381197-26-000093 ↗ |
| 8-K | 2026-04-29 | 2026-04-23 | 0001381197-26-000085 ↗ |
| 8-K | 2026-04-21 | 2026-04-21 | 0001381197-26-000078 ↗ |
| 10-K/A | 2026-03-31 | 2025-12-31 | 0001381197-26-000072 ↗ |
| 10-K | 2026-02-27 | 2025-12-31 | 0001381197-26-000062 ↗ |
| 8-K | 2026-01-20 | 2026-01-20 | 0001193125-26-016540 ↗ |
| 10-Q | 2025-11-05 | 2025-09-30 | 0001381197-25-000158 ↗ |
| 8-K | 2025-10-16 | 2025-10-16 | 0001381197-25-000143 ↗ |
| 10-Q | 2025-08-06 | 2025-06-30 | 0001381197-25-000103 ↗ |
| 8-K | 2025-07-30 | 2025-07-30 | 0001381197-25-000086 ↗ |
| 8-K | 2025-07-17 | 2025-07-17 | 0001381197-25-000078 ↗ |
| 10-Q | 2025-05-08 | 2025-03-31 | 0001381197-25-000052 ↗ |