v3.26.1
Condensed Consolidated Statements of Changes in Equity (Unaudited) - USD ($)
$ in Millions
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income [Member]
Total Stockholders' Equity [Member]
Non-controlling Interests [Member]
Balance at Dec. 31, 2024 $ 16,597 $ 1 $ 1,816 $ (7) $ 2,515 $ (45) $ 4,280 $ 12,317
Balance (in shares) at Dec. 31, 2024   436,244,236            
Issuance of common stock - IBKR Promotions     3 (10)     (7) 7
Issuance of common stock - IBKR Promotions, shares   200,000            
Net distribution of common stocks - IBKR Promotion 7     6     6 1
Compensation for stock grants vesting in the future 31   8       8 23
Dividends paid to stockholders (27)       (27)   (27)  
Distributions from IBG LLC to noncontrolling interests (196)             (196)
Adjustments for changes in proportionate ownership in IBG LLC     1       1 (1)
Comprehensive income 1,071       213 28 241 830
Balance at Mar. 31, 2025 17,483 $ 1 1,828 (11) 2,701 (17) 4,502 12,981
Balance (in shares) at Mar. 31, 2025   436,444,236            
Issuance of common stock - IBKR Promotions (1)   2 (11)     (9) 8
Issuance of common stock - IBKR Promotions, shares   200,000            
Common stock distributed pursuant to stock incentive plans, Shares   5,443,128            
Net distribution of common stocks - IBKR Promotion 8     8     8  
Compensation for stock grants vesting in the future 28   8       8 20
Repurchases of common stock for employee tax withholdings under stock incentive plans (84)     (84)     (84)  
Sales of treasury stock 95   3 84     87 8
Dividends paid to stockholders (35)       (35)   (35)  
Distributions from IBG LLC to noncontrolling interests (288)             (288)
Adjustments for changes in proportionate ownership in IBG LLC     45       45 (45)
Comprehensive income 1,312       224 79 303 1,009
Balance at Jun. 30, 2025 18,518 $ 1 1,886 (14) 2,890 62 4,825 13,693
Balance (in shares) at Jun. 30, 2025   442,087,364            
Balance at Dec. 31, 2025 20,472 $ 1 1,957 (16) 3,365 56 5,363 15,109
Balance (in shares) at Dec. 31, 2025   446,130,605            
Common stock distributed pursuant to stock incentive plans, Shares   3,501            
Net distribution of common stocks - IBKR Promotion 4     4     4  
Compensation for stock grants vesting in the future 33   8       8 25
Dividends paid to stockholders (36)       (36)   (36)  
Distributions from IBG LLC to noncontrolling interests (305)             (305)
Comprehensive income 1,092       267 (21) 246 846
Balance at Mar. 31, 2026 21,260 $ 1 1,965 (12) 3,596 35 5,585 15,675
Balance (in shares) at Mar. 31, 2026   446,134,106            
Common stock distributed pursuant to stock incentive plans, Shares   5,054,787            
Net distribution of common stocks - IBKR Promotion 4     3     3 1
Compensation for stock grants vesting in the future 32   9       9 23
Repurchases of common stock for employee tax withholdings under stock incentive plans (146)     (146)     (146)  
Sales of treasury stock 150   1 146     147 3
Dividends paid to stockholders (39)       (39)   (39)  
Distributions from IBG LLC to noncontrolling interests (292)             (292)
Adjustments for changes in proportionate ownership in IBG LLC     48       48 (48)
Comprehensive income 1,281       312 (15) 297 984
Balance at Jun. 30, 2026 $ 22,250 $ 1 $ 2,023 $ (9) $ 3,869 $ 20 $ 5,904 $ 16,346
Balance (in shares) at Jun. 30, 2026   451,188,893