| Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan |
The Company recognized stock-based compensation expense in its Consolidated Financial Statements in the three and nine months ended September 30, 2026 and 2025, respectively, as follows: | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | | Nine Months Ended September 30, | | 2026 | | 2025 | | 2026 | | 2025 | | Stock-based compensation expense | $ | 16,000 | | | $ | 13,956 | | | $ | 46,809 | | | $ | 41,985 | | | Less: Deferred tax benefit | (2,596) | | | (2,561) | | | (7,723) | | | (7,737) | | | Stock-based compensation expense, net of tax | $ | 13,404 | | | $ | 11,395 | | | $ | 39,086 | | | $ | 34,248 | |
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| Schedule of Basic and Diluted Earnings Per Share |
The calculations of basic and diluted earnings per share for the three and nine months ended September 30, 2026 and 2025 are: | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | | Nine Months Ended September 30, | | 2026 | | 2025 | | 2026 | | 2025 | | Net income | $ | 171,247 | | | $ | 164,586 | | | $ | 547,574 | | | $ | 543,186 | | | Less: Net income attributable to non-controlling interests | 2,989 | | | 382 | | | 9,171 | | | 382 | | | Net income attributable to SEI Investments Company | $ | 168,258 | | | $ | 164,204 | | | $ | 538,403 | | | $ | 542,804 | | | Shares used to compute basic earnings per common share | 118,415,000 | | | 123,099,000 | | | 120,138,000 | | | 124,710,000 | | | Dilutive effect of stock awards | 3,597,000 | | | 3,226,000 | | | 3,142,000 | | | 2,974,000 | | | Shares used to compute diluted earnings per common share | 122,012,000 | | | 126,325,000 | | | 123,280,000 | | | 127,684,000 | | | Basic earnings per common share | $ | 1.42 | | | $ | 1.33 | | | $ | 4.48 | | | $ | 4.35 | | | Diluted earnings per common share | $ | 1.38 | | | $ | 1.30 | | | $ | 4.37 | | | $ | 4.25 | |
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