Nemser Earl H, Vice Chairman of Interactive Brokers Group, Inc. ($IBKR), sold shares on the open market 36 times over the last year, totaling $57.2 million. His most recent sale occurred on January 27, 2026. These sales rank him 277th among 11,678 individual insiders in our database, well above the average of $8.6 million per insider and 6.4 transactions. He made no open market purchases during this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan. 26, 2026 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 60882 | $75.83 | 545,948.0000 | 446,528,983 | 10.03% | 0.01% |
| Jan. 26, 2026 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 30817 | $76.72 | 515,131.0000 | 446,528,983 | 5.64% | 0.01% |
| Jan. 26, 2026 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 3101 | $77.98 | 512,030.0000 | 446,528,983 | 0.60% | 0.00% |
| Jan. 27, 2026 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 39731 | $75.07 | 472,299.0000 | 446,528,983 | 7.76% | 0.01% |
| Jan. 27, 2026 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 20469 | $75.75 | 451,830.0000 | 446,528,983 | 4.33% | 0.00% |
| Jan. 1, 2026 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | A | Class A common stock | 389 | $64.31 | 851,830.0000 | 446,528,983 | 0.05% | 0.00% |
| Jan. 22, 2026 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 100000 | $76.81 | 751,830.0000 | 446,528,983 | 11.74% | 0.02% |
| Jan. 23, 2026 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 84935 | $77.65 | 666,895.0000 | 446,528,983 | 11.30% | 0.02% |
| Jan. 23, 2026 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 60065 | $78.14 | 606,830.0000 | 446,528,983 | 9.01% | 0.01% |
| Dec. 31, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | A | Class A common stock | 389 | $64.31 | 851,441.0000 | 446,528,983 | 0.05% | 0.00% |
| Dec. 31, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | A | Class A common stock | 23240 | $0.00 | 851,052.0000 | 446,528,983 | 2.81% | 0.01% |
| Aug. 14, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 33379 | $63.86 | 848,333.0000 | 109,002,938 | 3.79% | 0.03% |
| Aug. 14, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 20521 | $64.22 | 827,812.0000 | 109,002,938 | 2.42% | 0.02% |
| Aug. 13, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 200 | $64.19 | 884,512.0000 | 109,002,938 | 0.02% | 0.00% |
| Aug. 12, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 153000 | $67.39 | 930,398.0000 | 109,002,938 | 14.12% | 0.14% |
| Aug. 12, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 41086 | $67.88 | 889,312.0000 | 109,002,938 | 4.42% | 0.04% |
| Aug. 13, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 4600 | $63.75 | 884,712.0000 | 109,002,938 | 0.52% | 0.00% |
| Aug. 13, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 200 | $66.09 | 884,312.0000 | 109,002,938 | 0.02% | 0.00% |
| Aug. 13, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 2400 | $66.77 | 881,912.0000 | 109,002,938 | 0.27% | 0.00% |
| Aug. 13, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 200 | $67.20 | 881,712.0000 | 109,002,938 | 0.02% | 0.00% |
| Aug. 8, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 2641 | $65.94 | 1,096,239.0000 | 109,002,938 | 0.24% | 0.00% |
| Aug. 8, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 10200 | $65.60 | 1,098,880.0000 | 109,002,938 | 0.92% | 0.01% |
| Aug. 11, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 12841 | $66.09 | 1,083,398.0000 | 109,002,938 | 1.17% | 0.01% |
| Aug. 6, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 200 | $64.16 | 1,121,921.0000 | 109,002,938 | 0.02% | 0.00% |
| Aug. 7, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 441 | $64.35 | 1,109,080.0000 | 109,002,938 | 0.04% | 0.00% |
| Aug. 6, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 12641 | $63.47 | 1,122,121.0000 | 109,002,938 | 1.11% | 0.01% |
| Aug. 7, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 12400 | $63.94 | 1,109,521.0000 | 109,002,938 | 1.11% | 0.01% |
| Aug. 4, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 12841 | $64.54 | 1,147,603.0000 | 109,002,938 | 1.11% | 0.01% |
| Aug. 5, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 1800 | $64.84 | 1,134,762.0000 | 109,002,938 | 0.16% | 0.00% |
| Aug. 5, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 11041 | $63.64 | 1,136,562.0000 | 109,002,938 | 0.96% | 0.01% |
| July 31, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 2200 | $66.71 | 1,173,285.0000 | 109,002,938 | 0.19% | 0.00% |
| Aug. 1, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 1200 | $62.79 | 1,172,085.0000 | 109,002,938 | 0.10% | 0.00% |
| Aug. 1, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 7441 | $63.94 | 1,164,644.0000 | 109,002,938 | 0.63% | 0.01% |
| Aug. 1, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 3200 | $64.71 | 1,161,444.0000 | 109,002,938 | 0.27% | 0.00% |
| Aug. 1, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 1000 | $65.66 | 1,160,444.0000 | 109,002,938 | 0.09% | 0.00% |
| July 31, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 12441 | $66.18 | 1,175,485.0000 | 109,002,938 | 1.05% | 0.01% |
| July 30, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 32386 | $66.32 | 795,326.0000 | 109,002,938 | 3.91% | 0.03% |
| July 30, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 7400 | $66.64 | 787,926.0000 | 109,002,938 | 0.93% | 0.01% |
| July 30, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | A | Class A common stock | 400000 | $66.22 | 1,187,926.0000 | 109,002,938 | 50.77% | 0.37% |
| July 28, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 100 | $65.90 | 827,712.0000 | 109,002,938 | 0.01% | 0.00% |
| June 23, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | G | Class A common stock | 500 | $0.00 | 827,812.0000 | 109,002,938 | 0.06% | 0.00% |
| May 9, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | F | Class A common stock | 5178 | $185.60 | 207,078.0000 | 109,002,938 | 2.44% | 0.00% |
| May 9, 2025 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | F | Class A common stock | 5178 | $185.60 | 207,078.0000 | 109,002,938 | 2.44% | 0.00% |
| Dec. 31, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | A | Class A common stock | 7763 | $0.00 | 212,114.0000 | 438,145,440 | 3.80% | 0.00% |
| Dec. 31, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | A | Class A common stock | 142 | $176.67 | 212,256.0000 | 438,145,440 | 0.07% | 0.00% |
| July 25, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | A | Class A common stock | 100000 | $118.57 | 204,351.0000 | 105,846,877 | 95.83% | 0.09% |
| May 9, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | F | Class A common stock | 4419 | $119.13 | 104,351.0000 | 105,846,877 | 4.06% | 0.00% |
| Feb. 22, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 5000 | $107.01 | 108,770.0000 | 105,846,877 | 4.39% | 0.00% |
| Feb. 21, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 5000 | $104.86 | 113,770.0000 | 105,846,877 | 4.21% | 0.00% |
| Feb. 16, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 2094 | $106.01 | 118,770.0000 | 105,846,877 | 1.73% | 0.00% |
| Feb. 15, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 2100 | $102.02 | 131,670.0000 | 105,846,877 | 1.57% | 0.00% |
| Feb. 15, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 3400 | $102.83 | 128,270.0000 | 105,846,877 | 2.58% | 0.00% |
| Feb. 15, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 500 | $103.57 | 127,770.0000 | 105,846,877 | 0.39% | 0.00% |
| Feb. 15, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 4000 | $104.92 | 123,770.0000 | 105,846,877 | 3.13% | 0.00% |
| Feb. 16, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 2906 | $105.35 | 120,864.0000 | 105,846,877 | 2.35% | 0.00% |
| Feb. 14, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 10650 | $101.28 | 148,120.0000 | 105,846,877 | 6.71% | 0.01% |
| Feb. 13, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 20809 | $100.73 | 187,961.0000 | 105,846,877 | 9.97% | 0.02% |
| Feb. 13, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 29191 | $101.31 | 158,770.0000 | 105,846,877 | 15.53% | 0.03% |
| Feb. 14, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 14350 | $102.09 | 133,770.0000 | 105,846,877 | 9.69% | 0.01% |
| Feb. 5, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 1235 | $96.45 | 208,770.0000 | 105,846,877 | 0.59% | 0.00% |
| Feb. 5, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 24547 | $95.67 | 210,005.0000 | 105,846,877 | 10.47% | 0.02% |
| Feb. 2, 2024 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | S | Class A common stock | 74218 | $96.29 | 234,552.0000 | 105,846,877 | 24.04% | 0.07% |
| Dec. 31, 2023 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | A | Class A common stock | 302 | $82.90 | 308,770.0000 | 101,299,609 | 0.10% | 0.00% |
| Dec. 31, 2023 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | A | Class A common stock | 14780 | $0.00 | 308,468.0000 | 101,299,609 | 5.03% | 0.01% |
| Dec. 6, 2023 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | G | Class A common stock | 800 | $0.00 | 293,688.0000 | 101,299,609 | 0.27% | 0.00% |
| Aug. 10, 2023 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | J | Class A common stock | 174822 | $86.85 | 294,488.0000 | 101,299,609 | 146.09% | 0.17% |
| Aug. 10, 2023 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | J | Class A common stock | 174822 | $86.85 | 294,488.0000 | 101,299,609 | 37.25% | 0.17% |
| Aug. 9, 2023 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | J | Class A common stock | 221178 | $86.85 | 469,310.0000 | 101,299,609 | 32.03% | 0.22% |
| July 27, 2023 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | A | Class A common stock | 396000 | $86.85 | 515,666.0000 | 101,299,609 | 330.92% | 0.39% |
| May 9, 2023 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | F | Class A common stock | 3052 | $77.99 | 119,666.0000 | 101,299,609 | 2.49% | 0.00% |
| May 9, 2023 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | F | Class A common stock | 2271 | $77.99 | 120,447.0000 | 101,299,609 | 1.85% | 0.00% |
| Dec. 31, 2022 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | A | Class A common stock | 14954 | $0.00 | 122,372.0000 | 0 | 13.92% | 0.00% |
| Dec. 31, 2022 | Interactive Brokers Group, Inc. | $IBKR | Nemser Earl H | Vice Chairman | A | Class A common stock | 346 | $72.35 | 122,718.0000 | 0 | 0.28% | 0.00% |