| ☒ | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 | ||||
☐ | TRANSITION REPORT PURSUANT TO SECTION 13 OF 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 | ||||

| Pennsylvania | 23-1707341 | |||||||
(State or Other Jurisdiction of Incorporation or Organization) | (I.R.S. Employer Identification No.) | |||||||
| Title of each class | Trading Symbol | Name of each exchange on which registered | ||||||||||||
| Common Stock, par value $0.01 per share | SEIC | The NASDAQ Stock Market LLC | ||||||||||||
| Large accelerated filer | x | Accelerated filer | ☐ | |||||||||||
| Non-accelerated filer | ☐ | Smaller reporting company | ☐ | |||||||||||
| Emerging growth company | ☐ | |||||||||||||
| Common Stock, $0.01 par value | 120,019,182 | |||||||
| PART I - FINANCIAL INFORMATION | ||||||||||||||
| Page | ||||||||||||||
| Item 1. | Financial Statements. | |||||||||||||
| Consolidated Balance Sheets (Unaudited) -- June 30, 2026 and December 31, 2025 | ||||||||||||||
| Consolidated Statements of Operations (Unaudited) -- For the Three and SIx Months Ended June 30, 2026 and 2025 | ||||||||||||||
| Consolidated Statements of Comprehensive Income (Unaudited) -- For the Three and Six Months Ended June 30, 2026 and 2025 | ||||||||||||||
| Consolidated Statements of Changes in Equity (Unaudited) -- For the Three and Six Months Ended June 30, 2026 and 2025 | ||||||||||||||
| Consolidated Condensed Statements of Cash Flows (Unaudited) -- For the Six Months Ended June 30, 2026 and 2025 | ||||||||||||||
| Notes to Consolidated Financial Statements | ||||||||||||||
| Item 2. | Management's Discussion and Analysis of Financial Condition and Results of Operations. | |||||||||||||
| Item 3. | Quantitative and Qualitative Disclosures About Market Risk. | |||||||||||||
| Item 4. | Controls and Procedures. | |||||||||||||
| PART II - OTHER INFORMATION | ||||||||||||||
| Item 1. | Legal Proceedings. | |||||||||||||
| Item 1A. | Risk Factors. | |||||||||||||
| Item 2. | Unregistered Sales of Equity Securities and Use of Proceeds. | |||||||||||||
| Item 5. | Other Information | |||||||||||||
| Item 6. | Exhibits. | |||||||||||||
| Signatures | ||||||||||||||
| Consolidated Balance Sheets | SEI Investments Company | ||||||||||
| (unaudited) | and Subsidiaries | ||||||||||
| (Dollars in thousands, except per-share data) | |||||||||||
| June 30, 2026 | December 31, 2025 | ||||||||||
| Assets | |||||||||||
| Current Assets: | |||||||||||
| Cash and cash equivalents | $ | 395,664 | $ | 399,804 | |||||||
| Receivables from investment products | 60,535 | 63,317 | |||||||||
Receivables, net of allowance for doubtful accounts of $1,746 and $1,916 | 783,400 | 709,748 | |||||||||
| Securities owned | 25,532 | 33,777 | |||||||||
| Other current assets | 78,095 | 66,691 | |||||||||
| Total Current Assets | 1,343,226 | 1,273,337 | |||||||||
Property and Equipment, net of accumulated depreciation of $481,673 and $468,700 | 151,885 | 150,434 | |||||||||
| Operating Lease Right-of-Use Assets | 32,345 | 26,447 | |||||||||
Capitalized Software, net of accumulated amortization of $688,085 and $669,896 | 227,215 | 234,272 | |||||||||
| Investments | 318,909 | 428,004 | |||||||||
| Assets of Consolidated Variable Interest Entities | 206,955 | 183,994 | |||||||||
| Goodwill | 389,420 | 354,989 | |||||||||
Intangible Assets, net of accumulated amortization of $68,666 and $49,534 | 470,524 | 368,272 | |||||||||
| Deferred Contract Costs | 56,967 | 53,345 | |||||||||
| Deferred Income Taxes | 8,183 | 8,048 | |||||||||
| Deposits Related to Acquisitions | 36,210 | 118,606 | |||||||||
| Other Assets, net | 82,499 | 60,096 | |||||||||
| Total Assets | $ | 3,324,338 | $ | 3,259,844 | |||||||
| Consolidated Balance Sheets | SEI Investments Company | ||||||||||
| (unaudited) | and Subsidiaries | ||||||||||
| (Dollars in thousands, except per-share data) | |||||||||||
| June 30, 2026 | December 31, 2025 | ||||||||||
| Liabilities, Redeemable Non-controlling Interests and Equity | |||||||||||
| Current Liabilities: | |||||||||||
| Accounts payable | $ | 10,547 | $ | 5,404 | |||||||
| Accrued liabilities | 225,607 | 359,823 | |||||||||
| Current portion of long-term debt | 3,487 | — | |||||||||
| Current portion of long-term operating lease liabilities | 10,169 | 8,677 | |||||||||
| Deferred revenue | 15,718 | 13,307 | |||||||||
| Total Current Liabilities | 265,528 | 387,211 | |||||||||
| Long-term Debt | 29,483 | — | |||||||||
| Liabilities of Consolidated Variable Interest Entities | 121,300 | 108,504 | |||||||||
| Deferred Income Taxes | 13,563 | 16,842 | |||||||||
| Long-term Operating Lease Liabilities | 24,713 | 19,885 | |||||||||
| Other Long-term Liabilities | 22,852 | 23,626 | |||||||||
| Total Liabilities | 477,439 | 556,068 | |||||||||
| Commitments and Contingencies | |||||||||||
| Redeemable Non-controlling Interests | 311,027 | 243,959 | |||||||||
| Equity: | |||||||||||
| Shareholders' Equity: | |||||||||||
Common stock, $0.01 par value, 750,000,000 shares authorized; 119,976,563 and 122,232,251 shares issued and outstanding | 1,200 | 1,222 | |||||||||
| Capital in excess of par value | 1,714,294 | 1,678,787 | |||||||||
| Retained earnings | 813,820 | 792,280 | |||||||||
| Accumulated other comprehensive loss, net | (29,616) | (24,505) | |||||||||
| Total SEI Shareholders' Equity | 2,499,698 | 2,447,784 | |||||||||
| Non-controlling interests | 36,174 | 12,033 | |||||||||
| Total Equity | 2,535,872 | 2,459,817 | |||||||||
| Total Liabilities, Redeemable Non-controlling Interests and Equity | $ | 3,324,338 | $ | 3,259,844 | |||||||
| Consolidated Statements of Operations | SEI Investments Company | ||||
| (unaudited) | and Subsidiaries | ||||
| (Dollars in thousands, except per-share data) | |||||
| Three Months Ended June 30, | Six Months Ended June 30, | ||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||
| Revenues: | |||||||||||||||||||||||
Asset management, administration and distribution fees | $ | 513,482 | $ | 437,543 | $ | 1,011,466 | $ | 869,686 | |||||||||||||||
Information processing and software servicing fees | 128,135 | 122,058 | 252,334 | 241,259 | |||||||||||||||||||
| Total revenues | 641,617 | 559,601 | 1,263,800 | 1,110,945 | |||||||||||||||||||
| Expenses: | |||||||||||||||||||||||
Subadvisory, distribution and other asset management costs | 59,980 | 49,709 | 116,726 | 97,241 | |||||||||||||||||||
Software royalties and other information processing costs | 9,677 | 9,191 | 19,609 | 18,272 | |||||||||||||||||||
Compensation, benefits and other personnel | 207,839 | 199,574 | 414,154 | 390,358 | |||||||||||||||||||
Stock-based compensation | 16,313 | 13,891 | 30,809 | 28,029 | |||||||||||||||||||
Consulting, outsourcing and professional fees | 56,269 | 56,942 | 110,672 | 112,943 | |||||||||||||||||||
Data processing and computer related | 46,862 | 41,801 | 91,735 | 81,120 | |||||||||||||||||||
Facilities, supplies and other costs | 21,453 | 21,744 | 41,775 | 40,499 | |||||||||||||||||||
Amortization | 19,137 | 10,449 | 37,491 | 21,159 | |||||||||||||||||||
Depreciation | 7,071 | 7,665 | 14,327 | 15,592 | |||||||||||||||||||
| Total expenses | 444,601 | 410,966 | 877,298 | 805,213 | |||||||||||||||||||
| Income from operations | 197,016 | 148,635 | 386,502 | 305,732 | |||||||||||||||||||
| Net gain from investments | 3,550 | 1,759 | 3,181 | 2,252 | |||||||||||||||||||
| Interest and dividend income | 7,012 | 9,283 | 14,174 | 19,504 | |||||||||||||||||||
| Interest expense | (562) | (92) | (1,035) | (277) | |||||||||||||||||||
| Gain on sale of business | — | 94,412 | — | 94,412 | |||||||||||||||||||
| Other income | — | 4,500 | 450 | 4,500 | |||||||||||||||||||
| Equity in earnings of unconsolidated affiliates | 38,694 | 33,640 | 71,170 | 62,387 | |||||||||||||||||||
| Net gain from consolidated variable interest entities | 7,475 | — | 9,554 | — | |||||||||||||||||||
| Income before income taxes | 253,185 | 292,137 | 483,996 | 488,510 | |||||||||||||||||||
| Income taxes | 53,645 | 65,054 | 107,669 | 109,910 | |||||||||||||||||||
| Net income | 199,540 | 227,083 | 376,327 | 378,600 | |||||||||||||||||||
| Less: Net income attributable to non-controlling interests | 3,882 | — | 6,182 | — | |||||||||||||||||||
| Net income attributable to SEI Investments Company | $ | 195,658 | $ | 227,083 | $ | 370,145 | $ | 378,600 | |||||||||||||||
| Basic earnings per common share | $ | 1.63 | $ | 1.82 | $ | 3.06 | $ | 3.02 | |||||||||||||||
| Shares used to compute basic earnings per share | 120,339 | 124,470 | 120,999 | 125,516 | |||||||||||||||||||
| Diluted earnings per common share | $ | 1.59 | $ | 1.78 | $ | 2.99 | $ | 2.95 | |||||||||||||||
| Shares used to compute diluted earnings per share | 123,334 | 127,278 | 123,914 | 128,364 | |||||||||||||||||||
| Dividends declared per common share | $ | 0.52 | $ | 0.49 | $ | 0.52 | $ | 0.49 | |||||||||||||||
| Consolidated Statements of Comprehensive Income | SEI Investments Company | |||||||
| (unaudited) | and Subsidiaries | |||||||
| (Dollars in thousands) | ||||||||
| Three Months Ended June 30, | Six Months Ended June 30, | |||||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | |||||||||||||||||||||||
| Net income | $ | 199,540 | $ | 227,083 | $ | 376,327 | $ | 378,600 | ||||||||||||||||||
| Other comprehensive (loss) income, net of tax: | ||||||||||||||||||||||||||
| Foreign currency translation adjustments | 293 | 16,527 | (3,494) | 21,893 | ||||||||||||||||||||||
| Unrealized (loss) gain on investments: | ||||||||||||||||||||||||||
Unrealized (losses) gains during the period, net of income taxes of $87, $(208), $279 and $(1,134) | (274) | 706 | (933) | 3,807 | ||||||||||||||||||||||
Reclassification adjustment for gains realized in net income, net of income taxes of $55, $22, $202 and $31 | (205) | (76) | (684) | (108) | ||||||||||||||||||||||
| Total other comprehensive (loss) income, net of tax | (186) | 17,157 | (5,111) | 25,592 | ||||||||||||||||||||||
| Comprehensive income | $ | 199,354 | $ | 244,240 | $ | 371,216 | $ | 404,192 | ||||||||||||||||||
| Less: Comprehensive income attributable to the non-controlling interests | 3,882 | — | 6,182 | — | ||||||||||||||||||||||
| Comprehensive income attributable to SEI Investments Company | $ | 195,472 | $ | 244,240 | $ | 365,034 | $ | 404,192 | ||||||||||||||||||
| Consolidated Statements of Changes in Equity | SEI Investments Company | |||||||
| (unaudited) | and Subsidiaries | |||||||
| (Dollars in thousands, except per-share data) | ||||||||
| Shares of Common Stock | Common Stock | Capital In Excess of Par Value | Retained Earnings | Accumulated Other Comprehensive Loss | Non-controlling Interests | Total Equity | |||||||||||||||||||||||||||||||||||
| For the Three Months Ended June 30, 2026 | |||||||||||||||||||||||||||||||||||||||||
| Balance, April 1, 2026 | 120,386 | $ | 1,204 | $ | 1,696,702 | $ | 781,778 | $ | (29,430) | $ | 36,530 | $ | 2,486,784 | ||||||||||||||||||||||||||||
| Net income | — | — | — | 195,658 | — | 543 | 196,201 | ||||||||||||||||||||||||||||||||||
Other comprehensive loss | — | — | — | — | (186) | — | (186) | ||||||||||||||||||||||||||||||||||
| Purchase and retirement of common stock | (1,293) | (13) | (11,782) | (100,571) | — | — | (112,366) | ||||||||||||||||||||||||||||||||||
| Issuance of common stock under employee stock purchase plan | 20 | — | 1,480 | — | — | — | 1,480 | ||||||||||||||||||||||||||||||||||
| Issuance of common stock under share-based award plans | 864 | 9 | 49,426 | — | — | — | 49,435 | ||||||||||||||||||||||||||||||||||
| Stock-based compensation | — | — | 16,313 | — | — | — | 16,313 | ||||||||||||||||||||||||||||||||||
Dividends declared ($0.52 per share) | — | — | — | (63,045) | — | — | (63,045) | ||||||||||||||||||||||||||||||||||
| Redemption value remeasurement | — | — | (37,845) | — | — | — | (37,845) | ||||||||||||||||||||||||||||||||||
| Capital distributions | — | — | — | — | — | (899) | (899) | ||||||||||||||||||||||||||||||||||
| Balance, June 30, 2026 | 119,977 | $ | 1,200 | $ | 1,714,294 | $ | 813,820 | $ | (29,616) | $ | 36,174 | $ | 2,535,872 | ||||||||||||||||||||||||||||
| Shares of Common Stock | Common Stock | Capital In Excess of Par Value | Retained Earnings | Accumulated Other Comprehensive Loss | Non-controlling Interests | Total Equity | |||||||||||||||||||||||||||||||||||
| For the Three Months Ended June 30, 2025 | |||||||||||||||||||||||||||||||||||||||||
| Balance, April 1, 2025 | 124,784 | $ | 1,247 | $ | 1,558,125 | $ | 737,020 | $ | (38,540) | $ | — | $ | 2,257,852 | ||||||||||||||||||||||||||||
| Net income | — | — | — | 227,083 | — | — | 227,083 | ||||||||||||||||||||||||||||||||||
Other comprehensive income | — | — | — | — | 17,157 | — | 17,157 | ||||||||||||||||||||||||||||||||||
| Purchase and retirement of common stock | (2,162) | (22) | (17,563) | (163,172) | — | — | (180,757) | ||||||||||||||||||||||||||||||||||
| Issuance of common stock under employee stock purchase plan | 20 | — | 1,419 | — | — | — | 1,419 | ||||||||||||||||||||||||||||||||||
| Issuance of common stock under share-based award plans | 1,055 | 11 | 61,457 | — | — | — | 61,468 | ||||||||||||||||||||||||||||||||||
| Stock-based compensation | — | — | 15,695 | — | — | — | 15,695 | ||||||||||||||||||||||||||||||||||
Dividends declared ($0.49 per share) | — | — | — | (61,478) | — | — | (61,478) | ||||||||||||||||||||||||||||||||||
| Balance, June 30, 2025 | 123,697 | $ | 1,236 | $ | 1,619,133 | $ | 739,453 | $ | (21,383) | $ | — | $ | 2,338,439 | ||||||||||||||||||||||||||||
| Consolidated Statements of Changes in Equity | SEI Investments Company | |||||||
| (unaudited) | and Subsidiaries | |||||||
| (Dollars in thousands, except per-share data) | ||||||||
| Shares of Common Stock | Common Stock | Capital In Excess of Par Value | Retained Earnings | Accumulated Other Comprehensive Loss | Non-controlling Interests | Total Equity | |||||||||||||||||||||||||||||||||||
| For the Six Months Ended June 30, 2026 | |||||||||||||||||||||||||||||||||||||||||
| Balance, January 1, 2026 | 122,232 | $ | 1,222 | $ | 1,678,787 | $ | 792,280 | $ | (24,505) | $ | 12,033 | $ | 2,459,817 | ||||||||||||||||||||||||||||
| Net income | — | — | — | 370,145 | — | 1,094 | 371,239 | ||||||||||||||||||||||||||||||||||
Other comprehensive loss | — | — | — | — | (5,111) | — | (5,111) | ||||||||||||||||||||||||||||||||||
| Purchase and retirement of common stock | (3,847) | (38) | (35,061) | (285,560) | — | — | (320,659) | ||||||||||||||||||||||||||||||||||
| Issuance of common stock under employee stock purchase plan | 41 | — | 2,960 | — | — | — | 2,960 | ||||||||||||||||||||||||||||||||||
| Issuance of common stock under share-based award plans | 1,551 | 16 | 87,491 | — | — | — | 87,507 | ||||||||||||||||||||||||||||||||||
| Stock-based compensation | — | — | 30,809 | — | — | — | 30,809 | ||||||||||||||||||||||||||||||||||
Dividends declared ($0.52 per share) | — | — | — | (63,045) | — | — | (63,045) | ||||||||||||||||||||||||||||||||||
| Acquired non-controlling interest | — | — | — | — | — | 24,397 | 24,397 | ||||||||||||||||||||||||||||||||||
| Redemption value remeasurement | — | — | (50,692) | — | — | — | (50,692) | ||||||||||||||||||||||||||||||||||
| Capital distributions | — | — | — | — | — | (1,350) | (1,350) | ||||||||||||||||||||||||||||||||||
| Balance, June 30, 2026 | 119,977 | $ | 1,200 | $ | 1,714,294 | $ | 813,820 | $ | (29,616) | $ | 36,174 | $ | 2,535,872 | ||||||||||||||||||||||||||||
| Shares of Common Stock | Common Stock | Capital In Excess of Par Value | Retained Earnings | Accumulated Other Comprehensive Loss | Non-controlling Interests | Total Equity | |||||||||||||||||||||||||||||||||||
| For the Six Months Ended June 30, 2025 | |||||||||||||||||||||||||||||||||||||||||
| Balance, January 1, 2025 | 126,840 | $ | 1,268 | $ | 1,539,816 | $ | 758,003 | $ | (46,975) | $ | — | $ | 2,252,112 | ||||||||||||||||||||||||||||
| Net income | — | — | — | 378,600 | — | — | 378,600 | ||||||||||||||||||||||||||||||||||
Other comprehensive income | — | — | — | — | 25,592 | — | 25,592 | ||||||||||||||||||||||||||||||||||
| Purchase and retirement of common stock | (4,663) | (47) | (37,882) | (335,672) | — | — | (373,601) | ||||||||||||||||||||||||||||||||||
| Issuance of common stock under employee stock purchase plan | 39 | — | 2,754 | — | — | — | 2,754 | ||||||||||||||||||||||||||||||||||
| Issuance of common stock under share-based award plans | 1,481 | 15 | 84,612 | — | — | — | 84,627 | ||||||||||||||||||||||||||||||||||
| Stock-based compensation | — | — | 29,833 | — | — | — | 29,833 | ||||||||||||||||||||||||||||||||||
Dividends declared ($0.49 per share) | — | — | — | (61,478) | — | — | (61,478) | ||||||||||||||||||||||||||||||||||
| Balance, June 30, 2025 | 123,697 | $ | 1,236 | $ | 1,619,133 | $ | 739,453 | $ | (21,383) | $ | — | $ | 2,338,439 | ||||||||||||||||||||||||||||
| Consolidated Statements of Cash Flows | SEI Investments Company | |||||||
| (unaudited) | and Subsidiaries | |||||||
| (Dollars in thousands) | ||||||||
| Six Months Ended June 30, | |||||||||||
| 2026 | 2025 | ||||||||||
| Cash flows from operating activities: | |||||||||||
| Net income | $ | 376,327 | $ | 378,600 | |||||||
| Adjustments to reconcile net income to net cash provided by operating activities: | |||||||||||
| Depreciation | 14,327 | 15,592 | |||||||||
| Amortization | 37,491 | 21,159 | |||||||||
| Equity in earnings of unconsolidated affiliates | (71,170) | (62,387) | |||||||||
| Distributions received from unconsolidated affiliates | 73,950 | 67,130 | |||||||||
| Stock-based compensation | 30,809 | 28,029 | |||||||||
| Provision for losses on receivables | (170) | 521 | |||||||||
| Deferred income tax benefit | (2,932) | (498) | |||||||||
| Net loss (gain) from investments | (3,181) | (2,252) | |||||||||
| Net gain from business divestiture | — | (94,412) | |||||||||
| Change in other long-term liabilities | 323 | 1,189 | |||||||||
| Change in other assets | (12,500) | (3,456) | |||||||||
| Contract costs capitalized, net of amortization | (3,622) | (1,758) | |||||||||
| Contingent consideration fair value adjustments | — | (2,354) | |||||||||
| Insurance rebates received for Health and Welfare Benefit Plan Trust | — | 14,500 | |||||||||
| Insurance rebates transferred to Health and Welfare Benefit Plan Trust | — | (14,500) | |||||||||
| Other | 695 | (1,423) | |||||||||
| Change in current assets and liabilities: | |||||||||||
| Receivables from investment products | 2,782 | 5,023 | |||||||||
| Receivables | (75,739) | (79,422) | |||||||||
| Other current assets | (11,404) | (6,321) | |||||||||
| Advances due from unconsolidated affiliate | 61,390 | 47,485 | |||||||||
| Accounts payable | 5,141 | 3 | |||||||||
| Accrued liabilities | (73,442) | (68,279) | |||||||||
| Deferred revenue | 2,411 | 836 | |||||||||
| Consolidated variable interest entities related: | |||||||||||
| Change from investment security transactions | 5,394 | — | |||||||||
| Net gain from investments | (9,554) | — | |||||||||
| Change in other assets and liabilities | 41 | — | |||||||||
| Total adjustments | (28,960) | (135,595) | |||||||||
| Net cash provided by operating activities | $ | 347,367 | $ | 243,005 | |||||||
| Consolidated Statements of Cash Flows | SEI Investments Company | |||||||
| (unaudited) | and Subsidiaries | |||||||
| (Dollars in thousands) | ||||||||
| Six Months Ended June 30, | |||||||||||
| 2026 | 2025 | ||||||||||
| Cash flows from investing activities: | |||||||||||
| Additions to property and equipment | (15,029) | (12,451) | |||||||||
| Additions to capitalized software | (11,132) | (14,466) | |||||||||
| Purchases of marketable securities | (81,568) | (85,681) | |||||||||
| Prepayments and maturities of marketable securities | 105,985 | 65,168 | |||||||||
| Purchases of interest in limited partnerships | — | (566) | |||||||||
| Return of deposits on canceled acquisitions | 17,594 | — | |||||||||
| Proceeds from fixed asset dispositions | — | 1,165 | |||||||||
| Proceeds from business divestiture | — | 116,020 | |||||||||
| Other investing activities | 1,013 | (3,921) | |||||||||
| Net cash provided by investing activities | $ | 16,863 | $ | 65,268 | |||||||
| Cash flows from financing activities: | |||||||||||
| Purchase and retirement of common stock | (320,654) | (383,304) | |||||||||
| Proceeds from issuance of common stock | 90,466 | 87,381 | |||||||||
| Payment of dividends | (126,268) | (123,297) | |||||||||
| Distributions to non-controlling interest holders | (1,351) | — | |||||||||
| Consolidated variable interest entities related: | |||||||||||
| Non-controlling interest capital raised, net | 889 | — | |||||||||
| Net cash used in financing activities | $ | (356,918) | $ | (419,220) | |||||||
| Effect of exchange rate changes on cash and cash equivalents | (5,406) | 17,103 | |||||||||
| Net change in cash and cash equivalents and cash and cash equivalents held at consolidated variable interest entities | 1,906 | (93,844) | |||||||||
| Cash, cash equivalents and cash and cash equivalents held at consolidated variable interest entities, beginning of period | 470,595 | 840,193 | |||||||||
| Cash, cash equivalents and cash and cash equivalents held at consolidated variable interest entities, end of period | $ | 472,501 | $ | 746,349 | |||||||
| Non-cash investing activities: | |||||||||||
| Application of previously funded acquisition deposits toward purchase consideration | $ | 60,431 | $ | — | |||||||
| Reconciliation of Cash, cash equivalents and cash and cash equivalents held at consolidated variable interest entities to the Consolidated Balance Sheets: | June 30, 2026 | December 31, 2025 | |||||||||
| Cash and cash equivalents | $ | 395,664 | $ | 399,804 | |||||||
| Cash and cash equivalents held at consolidated variable interest entities | 76,837 | 70,791 | |||||||||
| Total cash and cash equivalents and cash and cash equivalents held at consolidated variable interest entities | $ | 472,501 | $ | 470,595 | |||||||
| Notes to Consolidated Financial Statements | SEI Investments Company | |||||||
| (all figures are in thousands except share and per-share data) | and Subsidiaries | |||||||
| Redeemable Non-controlling Interests | ||||||||
Balance, December 31, 2025 | $ | 243,959 | ||||||
| Increase from acquisition | 10,400 | |||||||
| Net income attributable to non-controlling interests | 5,087 | |||||||
| Capital contributions from non-controlling interests, net | 889 | |||||||
| Redemption value remeasurement | 50,692 | |||||||
Balance, June 30, 2026 | $ | 311,027 | ||||||
| Three Months Ended June 30, | Six Months Ended June 30, | ||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||
| Net income | $ | 199,540 | $ | 227,083 | $ | 376,327 | $ | 378,600 | |||||||||||||||
| Less: Net income attributable to non-controlling interests | 3,882 | — | 6,182 | — | |||||||||||||||||||
| Net income attributable to SEI Investments Company | $ | 195,658 | $ | 227,083 | $ | 370,145 | $ | 378,600 | |||||||||||||||
| Shares used to compute basic earnings per common share | 120,339,000 | 124,470,000 | 120,999,000 | 125,516,000 | |||||||||||||||||||
| Dilutive effect of stock awards | 2,995,000 | 2,808,000 | 2,915,000 | 2,848,000 | |||||||||||||||||||
| Shares used to compute diluted earnings per common share | 123,334,000 | 127,278,000 | 123,914,000 | 128,364,000 | |||||||||||||||||||
| Basic earnings per common share | $ | 1.63 | $ | 1.82 | $ | 3.06 | $ | 3.02 | |||||||||||||||
| Diluted earnings per common share | $ | 1.59 | $ | 1.78 | $ | 2.99 | $ | 2.95 | |||||||||||||||
| June 30, 2026 | December 31, 2025 | |||||||||||||
| Investment in LSV Asset Management | $ | 59,890 | $ | 121,512 | ||||||||||
| Other equity method investments | 34,420 | 67,637 | ||||||||||||
| Total | $ | 94,310 | $ | 189,149 | ||||||||||
| Condensed Statement of Operations | Three Months Ended June 30, | Six Months Ended June 30, | ||||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | |||||||||||||||||||||||
| Revenues | $ | 140,854 | $ | 114,215 | $ | 256,308 | $ | 214,143 | ||||||||||||||||||
| Net income | 99,502 | 87,311 | 182,799 | 161,825 | ||||||||||||||||||||||
| June 30, 2026 | December 31, 2025 | ||||||||||
| Trade receivables | $ | 185,093 | $ | 178,902 | |||||||
| Fees earned, not billed | 547,771 | 483,860 | |||||||||
| Taxes receivable | 42,703 | 40,415 | |||||||||
| Other receivables | 9,579 | 8,487 | |||||||||
| 785,146 | 711,664 | ||||||||||
| Less: Allowance for doubtful accounts | (1,746) | (1,916) | |||||||||
| $ | 783,400 | $ | 709,748 | ||||||||
| June 30, 2026 | December 31, 2025 | ||||||||||
| Buildings | $ | 222,712 | $ | 221,488 | |||||||
| Equipment | 169,539 | 158,740 | |||||||||
| Land | 27,457 | 27,457 | |||||||||
| Purchased software | 165,210 | 165,229 | |||||||||
| Furniture and fixtures | 23,183 | 23,066 | |||||||||
| Leasehold improvements | 24,784 | 23,003 | |||||||||
| Construction in progress | 673 | 151 | |||||||||
| 633,558 | 619,134 | ||||||||||
| Less: Accumulated depreciation | (481,673) | (468,700) | |||||||||
| Property and Equipment, net | $ | 151,885 | $ | 150,434 | |||||||
| June 30, 2026 | December 31, 2025 | ||||||||||
| Accrued employee compensation | $ | 78,358 | $ | 143,358 | |||||||
| Accrued consulting, outsourcing and professional fees | 31,669 | 29,186 | |||||||||
| Accrued sub-advisory, distribution and other asset management fees | 55,334 | 56,445 | |||||||||
| Accrued dividend payable | 1,958 | 65,182 | |||||||||
| Accrued income taxes | 3,777 | 6,560 | |||||||||
| Other accrued liabilities | 54,511 | 59,092 | |||||||||
| Total accrued liabilities | $ | 225,607 | $ | 359,823 | |||||||
| At June 30, 2026 | ||||||||||||||||||||||||||||||||
Level 1 | Level 2 | Level 3 | NAV as a Practical Expedient | Total | ||||||||||||||||||||||||||||
| Financial Assets | ||||||||||||||||||||||||||||||||
| SEI Investments Company | ||||||||||||||||||||||||||||||||
| Equity securities | $ | 69,651 | $ | — | $ | — | $ | — | $ | 69,651 | ||||||||||||||||||||||
| Available-for-sale debt securities | — | 141,249 | — | — | 141,249 | |||||||||||||||||||||||||||
| Securities owned | — | 25,532 | — | — | 25,532 | |||||||||||||||||||||||||||
| Investment funds sponsored by LSV | — | — | — | 12,922 | 12,922 | |||||||||||||||||||||||||||
| Investments in limited partnership funds | — | — | — | 777 | 777 | |||||||||||||||||||||||||||
| Total financial assets of SEI Investments Company | 69,651 | 166,781 | — | 13,699 | 250,131 | |||||||||||||||||||||||||||
| Consolidated VIEs | ||||||||||||||||||||||||||||||||
| Equity securities | 130,072 | — | — | — | 130,072 | |||||||||||||||||||||||||||
| Total financial assets of consolidated VIEs | 130,072 | — | — | — | 130,072 | |||||||||||||||||||||||||||
| Total financial assets measured at fair value | $ | 199,723 | $ | 166,781 | $ | — | $ | 13,699 | $ | 380,203 | ||||||||||||||||||||||
| Financial Liabilities | ||||||||||||||||||||||||||||||||
| SEI Investments Company | ||||||||||||||||||||||||||||||||
| Contingent considerations | $ | — | $ | — | $ | 6,736 | $ | — | $ | 6,736 | ||||||||||||||||||||||
| Total financial liabilities of SEI Investments Company | — | — | 6,736 | — | 6,736 | |||||||||||||||||||||||||||
| Consolidated VIEs | ||||||||||||||||||||||||||||||||
| Securities sold short | 121,036 | — | — | — | 121,036 | |||||||||||||||||||||||||||
| Total financial liabilities of consolidated VIEs | 121,036 | — | — | — | 121,036 | |||||||||||||||||||||||||||
| Total financial liabilities measured at fair value | $ | 121,036 | $ | — | $ | 6,736 | $ | — | $ | 127,772 | ||||||||||||||||||||||
| At December 31, 2025 | ||||||||||||||||||||||||||||||||
Level 1 | Level 2 | Level 3 | NAV as a Practical Expedient | Total | ||||||||||||||||||||||||||||
| Financial Assets | ||||||||||||||||||||||||||||||||
| SEI Investments Company | ||||||||||||||||||||||||||||||||
| Equity securities | $ | 67,414 | $ | — | $ | — | $ | — | $ | 67,414 | ||||||||||||||||||||||
| Available-for-sale debt securities | — | 158,690 | — | — | 158,690 | |||||||||||||||||||||||||||
| Securities owned | — | 33,777 | — | — | 33,777 | |||||||||||||||||||||||||||
| Investment funds sponsored by LSV | — | — | — | 11,593 | 11,593 | |||||||||||||||||||||||||||
| Investments in limited partnership funds | — | — | — | 1,158 | 1,158 | |||||||||||||||||||||||||||
| Total financial assets of SEI Investments Company | ||||||||||||||||||||||||||||||||
| Consolidated VIEs | ||||||||||||||||||||||||||||||||
| Equity securities | 113,119 | — | — | — | 113,119 | |||||||||||||||||||||||||||
| Total financial assets of consolidated VIEs | 113,119 | — | — | — | 113,119 | |||||||||||||||||||||||||||
| Total financial assets measured at fair value | $ | 180,533 | $ | 192,467 | $ | — | $ | 12,751 | $ | 385,751 | ||||||||||||||||||||||
| Financial Liabilities | ||||||||||||||||||||||||||||||||
| SEI Investments Company | ||||||||||||||||||||||||||||||||
| Contingent considerations | $ | — | $ | — | $ | 7,834 | $ | — | $ | 7,834 | ||||||||||||||||||||||
| Total financial liabilities of SEI Investments Company | — | — | 7,834 | — | 7,834 | |||||||||||||||||||||||||||
| Consolidated VIEs | ||||||||||||||||||||||||||||||||
| Securities sold short | 108,243 | — | — | — | 108,243 | |||||||||||||||||||||||||||
| Total financial liabilities of consolidated VIEs | 108,243 | — | — | — | 108,243 | |||||||||||||||||||||||||||
| Total financial liabilities measured at fair value | $ | 108,243 | $ | — | $ | 7,834 | $ | — | $ | 116,077 | ||||||||||||||||||||||
| June 30, 2026 | December 31, 2025 | |||||||||||||
| Available for sale debt securities | $ | 141,249 | $ | 158,690 | ||||||||||
| Investment products and equities | 69,651 | 67,414 | ||||||||||||
| Investments in affiliated funds | 12,922 | 11,593 | ||||||||||||
| Investments in limited partnership funds | 777 | 1,158 | ||||||||||||
| Equity method investments (See Note 2) | 94,310 | 189,149 | ||||||||||||
| Total | $ | 318,909 | $ | 428,004 | ||||||||||
| At June 30, 2026 | |||||||||||||||||||||||
| Cost Amount | Gross Unrealized Gains | Gross Unrealized (Losses) | Fair Value | ||||||||||||||||||||
Mortgage-backed securities issued by GNMA | $ | 145,079 | $ | — | $ | (6,481) | $ | 138,598 | |||||||||||||||
| Corporate and government agency debt securities | 2,651 | — | — | 2,651 | |||||||||||||||||||
| $ | 147,730 | $ | — | $ | (6,481) | $ | 141,249 | ||||||||||||||||
| At December 31, 2025 | |||||||||||||||||||||||
| Cost Amount | Gross Unrealized Gains | Gross Unrealized (Losses) | Fair Value | ||||||||||||||||||||
Mortgage-backed securities issued by GNMA | $ | 163,071 | $ | — | $ | (4,381) | $ | 158,690 | |||||||||||||||
| $ | 163,071 | $ | — | $ | (4,381) | $ | 158,690 | ||||||||||||||||
| June 30, 2026 | December 31, 2025 | |||||||||||||
| Unrealized holding losses | $ | (6,481) | $ | (4,381) | ||||||||||
| Less: Income tax benefit | 1,491 | 1,008 | ||||||||||||
| Unrealized holding losses, net of tax | (4,990) | (3,373) | ||||||||||||
| At June 30, 2026 | ||||||||||||||
| Cost | Fair Value | |||||||||||||
| Within one year | $ | 2,774 | $ | 2,736 | ||||||||||
| After one year through five years | 2,246 | 1,996 | ||||||||||||
| After 5 years through 10 years | 37,504 | 33,370 | ||||||||||||
| After 10 years | 105,206 | 103,147 | ||||||||||||
| $ | 147,730 | $ | 141,249 | |||||||||||
| At December 31, 2025 | ||||||||||||||
| Cost | Fair Value | |||||||||||||
| Within one year | $ | — | $ | — | ||||||||||
| After one year through five years | 3,248 | 2,930 | ||||||||||||
| After 5 years through 10 years | 14,789 | 13,787 | ||||||||||||
| After 10 years | 145,034 | 141,973 | ||||||||||||
| $ | 163,071 | $ | 158,690 | |||||||||||
| Three Months Ended June 30, | Six Months Ended June 30, | ||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||
| Stock-based compensation expense | $ | 16,313 | $ | 13,891 | $ | 30,809 | $ | 28,029 | |||||||||||||||
| Less: Deferred tax benefit | (2,717) | (2,554) | (5,127) | (5,176) | |||||||||||||||||||
| Stock-based compensation expense, net of tax | $ | 13,596 | $ | 11,337 | $ | 25,682 | $ | 22,853 | |||||||||||||||
Foreign Currency Translation Adjustments | Unrealized Gains (Losses) on Investments | Accumulated Other Comprehensive Loss | |||||||||||||||
| Balance, January 1, 2026 | $ | (21,132) | $ | (3,373) | $ | (24,505) | |||||||||||
Other comprehensive loss before reclassifications | (3,494) | (933) | (4,427) | ||||||||||||||
| Amounts reclassified from accumulated other comprehensive loss | — | (684) | (684) | ||||||||||||||
Net current-period other comprehensive loss | (3,494) | (1,617) | (5,111) | ||||||||||||||
| Balance, June 30, 2026 | $ | (24,626) | $ | (4,990) | $ | (29,616) | |||||||||||
| Investment Managers | Private Banks | Investment Advisors | Institutional Investors | Investments In New Businesses | Total | ||||||||||||||||||||||||||||||
| For the Three Months Ended June 30, 2026 | |||||||||||||||||||||||||||||||||||
| Total revenue | $ | 227,679 | $ | 156,879 | $ | 177,897 | $ | 69,702 | $ | 9,460 | $ | 641,617 | |||||||||||||||||||||||
| Less: | |||||||||||||||||||||||||||||||||||
| Operations & services | 96,643 | 57,113 | 50,833 | 20,747 | 2,515 | 227,851 | |||||||||||||||||||||||||||||
| Sales, marketing & client service | 11,363 | 12,488 | 20,409 | 9,391 | 2,597 | 56,248 | |||||||||||||||||||||||||||||
| Technology services & infrastructure | 13,578 | 30,544 | 8,828 | 1,561 | 1,333 | 55,844 | |||||||||||||||||||||||||||||
| Strategic initiatives & new business development | 11,339 | 20,387 | 19,809 | 3,668 | 2,966 | 58,169 | |||||||||||||||||||||||||||||
Other segment expenses (1) | 3,155 | 4,688 | 1,987 | 1,459 | 628 | 11,917 | |||||||||||||||||||||||||||||
| Total segment expenses | 136,078 | 125,220 | 101,866 | 36,826 | 10,039 | 410,029 | |||||||||||||||||||||||||||||
| Non-controlling interest & other, net | — | — | 1,361 | — | — | 1,361 | |||||||||||||||||||||||||||||
| Segment profit (loss) | $ | 91,601 | $ | 31,659 | $ | 74,670 | $ | 32,876 | $ | (579) | $ | 230,227 | |||||||||||||||||||||||
| Investment Managers | Private Banks | Investment Advisors | Institutional Investors | Investments In New Businesses | Total | ||||||||||||||||||||||||||||||
| For the Three Months Ended June 30, 2025 | |||||||||||||||||||||||||||||||||||
| Total revenue | $ | 195,067 | $ | 141,449 | $ | 137,193 | $ | 69,343 | $ | 16,549 | $ | 559,601 | |||||||||||||||||||||||
| Less: | |||||||||||||||||||||||||||||||||||
| Operations & services | 88,371 | 53,245 | 42,799 | 20,718 | 5,637 | 210,770 | |||||||||||||||||||||||||||||
| Sales, marketing & client service | 10,501 | 10,122 | 10,237 | 10,099 | 4,797 | 45,756 | |||||||||||||||||||||||||||||
| Technology services & infrastructure | 13,768 | 28,268 | 8,908 | 1,584 | 1,502 | 54,030 | |||||||||||||||||||||||||||||
| Strategic initiatives & new business development | 6,283 | 21,500 | 12,094 | 2,268 | 4,824 | 46,969 | |||||||||||||||||||||||||||||
Other segment expenses (1) | 2,713 | 5,589 | 1,763 | 1,188 | 1,670 | 12,923 | |||||||||||||||||||||||||||||
| Total segment expenses | 121,636 | 118,724 | 75,801 | 35,857 | 18,430 | 370,448 | |||||||||||||||||||||||||||||
| Segment profit (loss) | $ | 73,431 | $ | 22,725 | $ | 61,392 | $ | 33,486 | $ | (1,881) | $ | 189,153 | |||||||||||||||||||||||
| Three Months Ended June 30, | |||||||||||
| 2026 | 2025 | ||||||||||
| Total segment profit | $ | 230,227 | $ | 189,153 | |||||||
| Corporate overhead expenses | (34,572) | (40,518) | |||||||||
Segment reclassification (2) | 1,361 | — | |||||||||
| Income from operations | $ | 197,016 | $ | 148,635 | |||||||
| Amortization | Depreciation | ||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||
| Investment Managers | $ | 1,698 | $ | 201 | $ | 1,795 | $ | 1,732 | |||||||||||||||
| Private Banks | 5,664 | 5,344 | 2,587 | 2,694 | |||||||||||||||||||
| Investment Advisors | 9,325 | 2,450 | 1,668 | 2,000 | |||||||||||||||||||
| Institutional Investors | 1,950 | 1,944 | 455 | 494 | |||||||||||||||||||
| Investments in New Businesses | 415 | 416 | 114 | 211 | |||||||||||||||||||
| Total from business segments | $ | 19,052 | $ | 10,355 | $ | 6,619 | $ | 7,131 | |||||||||||||||
| Corporate overhead | 85 | 94 | 452 | 534 | |||||||||||||||||||
| $ | 19,137 | $ | 10,449 | $ | 7,071 | $ | 7,665 | ||||||||||||||||
| Investment Managers | Private Banks | Investment Advisors | Institutional Investors | Investments In New Businesses | Total | ||||||||||||||||||||||||||||||
| For the Six Months Ended June 30, 2026 | |||||||||||||||||||||||||||||||||||
| Total revenue | $ | 448,396 | $ | 309,141 | $ | 347,592 | $ | 141,218 | $ | 17,453 | $ | 1,263,800 | |||||||||||||||||||||||
| Less: | |||||||||||||||||||||||||||||||||||
| Operations & services | 191,509 | 111,701 | 98,287 | 42,320 | 4,555 | 448,372 | |||||||||||||||||||||||||||||
| Sales, marketing & client service | 22,828 | 23,312 | 38,717 | 17,846 | 4,939 | 107,642 | |||||||||||||||||||||||||||||
| Technology services & infrastructure | 26,997 | 60,138 | 17,652 | 3,144 | 2,626 | 110,557 | |||||||||||||||||||||||||||||
| Strategic initiatives & new business development | 21,818 | 40,067 | 38,767 | 7,279 | 5,738 | 113,669 | |||||||||||||||||||||||||||||
Other segment expenses (3) | 6,765 | 10,033 | 4,800 | 3,374 | 1,374 | 26,346 | |||||||||||||||||||||||||||||
| Total segment expenses | 269,917 | 245,251 | 198,223 | 73,963 | 19,232 | 806,586 | |||||||||||||||||||||||||||||
| Non-controlling interest & other, net | — | — | 2,698 | — | — | 2,698 | |||||||||||||||||||||||||||||
| Segment profit (loss) | $ | 178,479 | $ | 63,890 | $ | 146,671 | $ | 67,255 | $ | (1,779) | $ | 454,516 | |||||||||||||||||||||||
| Investment Managers | Private Banks | Investment Advisors | Institutional Investors | Investments In New Businesses | Total | ||||||||||||||||||||||||||||||
| For the Six Months Ended June 30, 2025 | |||||||||||||||||||||||||||||||||||
| Total revenue | $ | 387,115 | $ | 279,163 | $ | 273,769 | $ | 137,849 | $ | 33,049 | $ | 1,110,945 | |||||||||||||||||||||||
| Less: | |||||||||||||||||||||||||||||||||||
| Operations & services | 174,610 | 103,531 | 83,837 | 41,391 | 10,598 | 413,967 | |||||||||||||||||||||||||||||
| Sales, marketing & client service | 20,333 | 19,032 | 19,432 | 19,755 | 9,725 | 88,277 | |||||||||||||||||||||||||||||
| Technology services & infrastructure | 26,520 | 56,603 | 17,775 | 3,132 | 2,870 | 106,900 | |||||||||||||||||||||||||||||
| Strategic initiatives & new business development | 12,671 | 43,880 | 23,802 | 4,827 | 10,522 | 95,702 | |||||||||||||||||||||||||||||
Other segment expenses (3) | 4,713 | 10,427 | 3,410 | 2,622 | 3,211 | 24,383 | |||||||||||||||||||||||||||||
| Total segment expenses | 238,847 | 233,473 | 148,256 | 71,727 | 36,926 | 729,229 | |||||||||||||||||||||||||||||
| Segment profit (loss) | $ | 148,268 | $ | 45,690 | $ | 125,513 | $ | 66,122 | $ | (3,877) | $ | 381,716 | |||||||||||||||||||||||
| 2026 | 2025 | ||||||||||
| Total segment profit | $ | 454,516 | $ | 381,716 | |||||||
| Corporate overhead expenses | (70,712) | (75,984) | |||||||||
Segment reclassification (4) | 2,698 | — | |||||||||
| Income from operations | $ | 386,502 | $ | 305,732 | |||||||
| Amortization | Depreciation | ||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||
| Investment Managers | $ | 3,409 | $ | 403 | $ | 3,608 | $ | 1,794 | |||||||||||||||
| Private Banks | 11,309 | 10,619 | 5,225 | 4,953 | |||||||||||||||||||
| Investment Advisors | 17,866 | 4,869 | 3,439 | 4,025 | |||||||||||||||||||
| Institutional Investors | 3,906 | 3,819 | 919 | 813 | |||||||||||||||||||
| Investments in New Businesses | 831 | 1,291 | 231 | 289 | |||||||||||||||||||
| Total from business segments | $ | 37,321 | $ | 21,001 | $ | 13,422 | $ | 11,874 | |||||||||||||||
| Corporate Overhead | 170 | 158 | 905 | 3,718 | |||||||||||||||||||
| $ | 37,491 | $ | 21,159 | $ | 14,327 | $ | 15,592 | ||||||||||||||||
| June 30, 2026 | December 31, 2025 | ||||||||||
| Gross liability for unrecognized tax benefits, exclusive of interest and penalties | $ | 14,815 | $ | 13,613 | |||||||
| Interest and penalties on unrecognized benefits | 2,136 | 1,685 | |||||||||
| Total gross uncertain tax positions | $ | 16,951 | $ | 15,298 | |||||||
| Amount included in Current liabilities | $ | 4,057 | $ | 3,642 | |||||||
| Amount included in Other long-term liabilities | 12,894 | 11,656 | |||||||||
| $ | 16,951 | $ | 15,298 | ||||||||
| Three Months Ended June 30, | Six Months Ended June 30, | |||||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | |||||||||||||||||||||||
| Statutory rate | 21.0 | % | 21.0 | % | 21.0 | % | 21.0 | % | ||||||||||||||||||
| State taxes, net of federal tax benefit | 2.9 | 2.8 | 2.9 | 2.8 | ||||||||||||||||||||||
| Foreign tax expense and tax rate differential | (0.1) | (0.2) | (0.1) | (0.2) | ||||||||||||||||||||||
| Tax benefit from stock option exercises | (1.4) | (0.8) | (1.0) | (0.7) | ||||||||||||||||||||||
| Energy tax credits | (1.3) | — | (0.7) | — | ||||||||||||||||||||||
| Other, net | 0.1 | (0.5) | 0.2 | (0.4) | ||||||||||||||||||||||
| 21.2 | % | 22.3 | % | 22.3 | % | 22.5 | % | |||||||||||||||||||
| Six Months Ended June 30, | ||||||||||||||
| 2026 | 2025 | |||||||||||||
| Revenues | $ | 1,263,800 | $ | 1,124,913 | ||||||||||
| Net income attributable to SEI Investments Company | 370,517 | 369,758 | ||||||||||||
| Estimated Consideration | |||||
| Cash in deposit account | $ | 60,433 | |||
| Promissory notes to sellers | 30,707 | ||||
| Fair value of previously held equity method investments | 39,770 | ||||
| Contingent consideration | (450) | ||||
| Total purchase consideration | $ | 130,460 | |||
| Estimated Fair Value | |||||
| Cash and cash equivalents | $ | 1,595 | |||
| Other current assets | 23 | ||||
| Property and equipment, net | 16 | ||||
| Operating lease right-of-use asset | 654 | ||||
| Goodwill, net | 33,665 | ||||
| Identifiable intangible assets | 120,936 | ||||
| Lease liabilities | (654) | ||||
| Other liabilities | (1,378) | ||||
| Total net assets acquired | $ | 154,857 | |||
| Non-controlling interest | (24,397) | ||||
| $ | 130,460 | ||||
Estimated Fair Value | Estimated Useful Life | ||||||||||
Trade names | $ | 1,254 | 3 years | ||||||||
Unpatented technology | 758 | 1 year | |||||||||
Client relationships | 115,782 | 18 years | |||||||||
Non-compete agreements | 3,142 | 6 years | |||||||||
Total identifiable intangible assets | $ | 120,936 | |||||||||
| Investment Managers | Investment Advisors | Institutional Investors | Investments in New Businesses | Total | |||||||||||||||||||||||||
Balance, December 31, 2025 | $ | 55,247 | $ | 218,571 | $ | 62,712 | $ | 18,459 | $ | 354,989 | |||||||||||||||||||
| Acquisitions | — | 34,679 | — | — | 34,679 | ||||||||||||||||||||||||
| Foreign currency translation adjustments | (19) | — | (229) | — | (248) | ||||||||||||||||||||||||
Balance, June 30, 2026 | $ | 55,228 | $ | 253,250 | $ | 62,483 | $ | 18,459 | $ | 389,420 | |||||||||||||||||||
| Investment Managers | Private Banks | Investment Advisors | Institutional Investors | Investments In New Businesses | Total | ||||||||||||||||||||||||||||||
| Major Product Lines: | For the Three Months Ended June 30, 2026 | ||||||||||||||||||||||||||||||||||
| Investment management fees from pooled investment products | $ | 213 | $ | 37,058 | $ | 59,967 | $ | 14,130 | $ | 452 | $ | 111,820 | |||||||||||||||||||||||
| Investment management fees from investment management agreements | — | 1,002 | 73,799 | 51,273 | 5,556 | 131,630 | |||||||||||||||||||||||||||||
| Investment operations fees | 215,536 | 632 | 34,298 | 20 | 2 | 250,488 | |||||||||||||||||||||||||||||
| Investment processing fees - PaaS | 1,436 | 86,550 | 1,735 | 222 | 11 | 89,954 | |||||||||||||||||||||||||||||
| Investment processing fees - SaaS | — | 22,981 | 1,056 | 1,693 | 574 | 26,304 | |||||||||||||||||||||||||||||
| Professional services fees | 2,124 | 7,996 | — | — | — | 10,120 | |||||||||||||||||||||||||||||
| Account fees and other | 8,370 | 660 | 7,042 | 2,364 | 2,865 | 21,301 | |||||||||||||||||||||||||||||
| Total revenues | $ | 227,679 | $ | 156,879 | $ | 177,897 | $ | 69,702 | $ | 9,460 | $ | 641,617 | |||||||||||||||||||||||
| Primary Geographic Markets: | |||||||||||||||||||||||||||||||||||
| United States | $ | 199,061 | $ | 102,348 | $ | 177,897 | $ | 57,799 | $ | 8,386 | $ | 545,491 | |||||||||||||||||||||||
| United Kingdom | 2 | 36,313 | — | 6,935 | 1,074 | 44,324 | |||||||||||||||||||||||||||||
| Canada | — | 12,227 | — | 1,553 | — | 13,780 | |||||||||||||||||||||||||||||
| Ireland | 17,087 | 5,991 | — | 3,415 | — | 26,493 | |||||||||||||||||||||||||||||
| Luxembourg | 11,529 | — | — | — | — | 11,529 | |||||||||||||||||||||||||||||
| Total revenues | $ | 227,679 | $ | 156,879 | $ | 177,897 | $ | 69,702 | $ | 9,460 | $ | 641,617 | |||||||||||||||||||||||
| Investment Managers | Private Banks | Investment Advisors | Institutional Investors | Investments In New Businesses | Total | ||||||||||||||||||||||||||||||
| Major Product Lines: | For the Three Months Ended June 30, 2025 | ||||||||||||||||||||||||||||||||||
| Investment management fees from pooled investment products | $ | 114 | $ | 32,553 | $ | 54,075 | $ | 11,946 | $ | 393 | $ | 99,081 | |||||||||||||||||||||||
| Investment management fees from investment management agreements | — | 961 | 53,914 | 52,513 | 5,000 | 112,388 | |||||||||||||||||||||||||||||
| Investment operations fees | 184,876 | 620 | 20,720 | 16 | 851 | 207,083 | |||||||||||||||||||||||||||||
| Investment processing fees - PaaS | 1,329 | 78,925 | 1,496 | 585 | 10 | 82,345 | |||||||||||||||||||||||||||||
| Investment processing fees - SaaS | — | 21,851 | 1,411 | 1,899 | 6,441 | 31,602 | |||||||||||||||||||||||||||||
| Professional services fees | 1,116 | 5,874 | — | — | 628 | 7,618 | |||||||||||||||||||||||||||||
| Account fees and other | 7,632 | 665 | 5,577 | 2,384 | 3,226 | 19,484 | |||||||||||||||||||||||||||||
| Total revenues | $ | 195,067 | $ | 141,449 | $ | 137,193 | $ | 69,343 | $ | 16,549 | $ | 559,601 | |||||||||||||||||||||||
| Primary Geographic Markets: | |||||||||||||||||||||||||||||||||||
| United States | $ | 172,091 | $ | 93,273 | $ | 137,193 | $ | 58,165 | $ | 16,299 | $ | 477,021 | |||||||||||||||||||||||
| United Kingdom | 154 | 32,643 | — | 7,812 | 250 | 40,859 | |||||||||||||||||||||||||||||
| Canada | — | 10,343 | — | 1,529 | — | 11,872 | |||||||||||||||||||||||||||||
| Ireland | 14,341 | 5,190 | — | 1,837 | — | 21,368 | |||||||||||||||||||||||||||||
| Luxembourg | 8,481 | — | — | — | — | 8,481 | |||||||||||||||||||||||||||||
| Total revenues | $ | 195,067 | $ | 141,449 | $ | 137,193 | $ | 69,343 | $ | 16,549 | $ | 559,601 | |||||||||||||||||||||||
| Investment Managers | Private Banks | Investment Advisors | Institutional Investors | Investments In New Businesses | Total | ||||||||||||||||||||||||||||||
| Major Product Lines: | For the Six Months Ended June 30, 2026 | ||||||||||||||||||||||||||||||||||
| Investment management fees from pooled investment products | $ | 456 | $ | 72,397 | $ | 118,203 | $ | 27,510 | $ | 905 | $ | 219,471 | |||||||||||||||||||||||
| Investment management fees from investment management agreements | — | 1,940 | 141,053 | 103,191 | 10,998 | 257,182 | |||||||||||||||||||||||||||||
| Investment operations fees | 424,597 | 1,257 | 68,619 | 40 | 13 | 494,526 | |||||||||||||||||||||||||||||
| Investment processing fees - PaaS | 2,881 | 171,048 | 3,451 | 825 | 22 | 178,227 | |||||||||||||||||||||||||||||
| Investment processing fees - SaaS | — | 45,388 | 2,156 | 3,502 | 730 | 51,776 | |||||||||||||||||||||||||||||
| Professional services fees | 4,264 | 15,771 | — | — | — | 20,035 | |||||||||||||||||||||||||||||
| Account fees and other | 16,198 | 1,340 | 14,110 | 6,150 | 4,785 | 42,583 | |||||||||||||||||||||||||||||
| Total revenues | $ | 448,396 | $ | 309,141 | $ | 347,592 | $ | 141,218 | $ | 17,453 | $ | 1,263,800 | |||||||||||||||||||||||
| Primary Geographic Markets: | |||||||||||||||||||||||||||||||||||
| United States | $ | 392,956 | $ | 202,994 | $ | 347,592 | $ | 116,138 | $ | 15,713 | $ | 1,075,393 | |||||||||||||||||||||||
| United Kingdom | 57 | 70,962 | — | 15,501 | 1,740 | 88,260 | |||||||||||||||||||||||||||||
| Canada | — | 23,904 | — | 3,075 | — | 26,979 | |||||||||||||||||||||||||||||
| Ireland | 33,607 | 11,281 | — | 6,504 | — | 51,392 | |||||||||||||||||||||||||||||
| Luxembourg | 21,776 | — | — | — | — | 21,776 | |||||||||||||||||||||||||||||
| Total revenues | $ | 448,396 | $ | 309,141 | $ | 347,592 | $ | 141,218 | $ | 17,453 | $ | 1,263,800 | |||||||||||||||||||||||
| Investment Managers | Private Banks | Investment Advisors | Institutional Investors | Investments In New Businesses | Total | ||||||||||||||||||||||||||||||
| Major Product Lines: | For the Six Months Ended June 30, 2025 | ||||||||||||||||||||||||||||||||||
| Investment management fees from pooled investment products | $ | 222 | $ | 63,295 | $ | 109,179 | $ | 23,522 | $ | 796 | $ | 197,014 | |||||||||||||||||||||||
| Investment management fees from investment management agreements | — | 2,020 | 105,991 | 104,750 | 9,783 | 222,544 | |||||||||||||||||||||||||||||
| Investment operations fees | 365,233 | 1,242 | 41,557 | 27 | 1,984 | 410,043 | |||||||||||||||||||||||||||||
| Investment processing fees - PaaS | 2,616 | 154,780 | 2,860 | 1,208 | 19 | 161,483 | |||||||||||||||||||||||||||||
| Investment processing fees - SaaS | — | 43,666 | 2,793 | 3,736 | 12,265 | 62,460 | |||||||||||||||||||||||||||||
| Professional services fees | 2,825 | 12,788 | — | — | 1,614 | 17,227 | |||||||||||||||||||||||||||||
| Account fees and other | 16,219 | 1,372 | 11,389 | 4,606 | 6,588 | 40,174 | |||||||||||||||||||||||||||||
| Total revenues | $ | 387,115 | $ | 279,163 | $ | 273,769 | $ | 137,849 | $ | 33,049 | $ | 1,110,945 | |||||||||||||||||||||||
| Primary Geographic Markets: | |||||||||||||||||||||||||||||||||||
| United States | $ | 342,127 | $ | 186,404 | $ | 273,769 | $ | 115,174 | $ | 32,229 | $ | 949,703 | |||||||||||||||||||||||
| United Kingdom | 154 | 62,409 | — | 15,811 | 820 | 79,194 | |||||||||||||||||||||||||||||
| Canada | — | 20,326 | — | 2,943 | — | 23,269 | |||||||||||||||||||||||||||||
| Ireland | 28,400 | 10,024 | — | 3,921 | — | 42,345 | |||||||||||||||||||||||||||||
| Luxembourg | 16,434 | — | — | — | — | 16,434 | |||||||||||||||||||||||||||||
| Total revenues | $ | 387,115 | $ | 279,163 | $ | 273,769 | $ | 137,849 | $ | 33,049 | $ | 1,110,945 | |||||||||||||||||||||||
| Assets of Consolidated Variable Interest Entities | June 30, 2026 | December 31, 2025 | ||||||||||||
| Cash and cash equivalents | $ | 76,837 | $ | 70,791 | ||||||||||
| Equity securities | 130,072 | 113,119 | ||||||||||||
| Other assets | 46 | 84 | ||||||||||||
| Total | $ | 206,955 | $ | 183,994 | ||||||||||
| Liabilities of Consolidated Variable Interest Entities | June 30, 2026 | December 31, 2025 | ||||||||||||
| Accrued expenses | $ | 29 | $ | 28 | ||||||||||
| Securities sold short | 121,036 | 108,243 | ||||||||||||
| Due to broker for securities purchased | 235 | 233 | ||||||||||||
| Total | $ | 121,300 | $ | 108,504 | ||||||||||
| Three Months Ended June 30, | Percent Change | Six Months Ended June 30, | Percent Change | ||||||||||||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||||||||||||
| Revenues | $ | 641,617 | $ | 559,601 | 15% | $ | 1,263,800 | $ | 1,110,945 | 14% | |||||||||||||||||||||||||
| Expenses | 444,601 | 410,966 | 8% | 877,298 | 805,213 | 9% | |||||||||||||||||||||||||||||
| Income from operations | 197,016 | 148,635 | 33% | 386,502 | 305,732 | 26% | |||||||||||||||||||||||||||||
| Net gain from investments | 3,550 | 1,759 | 102% | 3,181 | 2,252 | 41% | |||||||||||||||||||||||||||||
| Interest income, net of interest expense | 6,450 | 9,191 | (30)% | 13,139 | 19,227 | (32)% | |||||||||||||||||||||||||||||
| Gain on sale of business | — | 94,412 | NM | — | 94,412 | NM | |||||||||||||||||||||||||||||
| Other income | — | 4,500 | NM | 450 | 4,500 | NM | |||||||||||||||||||||||||||||
| Equity in earnings of unconsolidated affiliates | 38,694 | 33,640 | 15% | 71,170 | 62,387 | 14% | |||||||||||||||||||||||||||||
| Net gain from consolidated variable interest entities | 7,475 | — | NM | 9,554 | — | NM | |||||||||||||||||||||||||||||
| Income before income taxes | 253,185 | 292,137 | (13)% | 483,996 | 488,510 | (1)% | |||||||||||||||||||||||||||||
| Income taxes | 53,645 | 65,054 | (18)% | 107,669 | 109,910 | (2)% | |||||||||||||||||||||||||||||
| Net income | 199,540 | 227,083 | (12)% | 376,327 | 378,600 | (1)% | |||||||||||||||||||||||||||||
| Less: Net income attributable to non-controlling interests | 3,882 | — | NM | 6,182 | — | NM | |||||||||||||||||||||||||||||
| Net income attributable to SEI Investments Company | $ | 195,658 | $ | 227,083 | (14)% | $ | 370,145 | $ | 378,600 | (2)% | |||||||||||||||||||||||||
| Diluted earnings per common share | $ | 1.59 | $ | 1.78 | (11)% | $ | 2.99 | $ | 2.95 | 1% | |||||||||||||||||||||||||
| As of June 30, | Percent Change | ||||||||||||||||
| 2026 | 2025 | ||||||||||||||||
| Investment Managers: | |||||||||||||||||
| Collective trust fund programs (A) | $ | 265,265 | $ | 225,690 | 18% | ||||||||||||
| Liquidity funds | 464 | 307 | 51% | ||||||||||||||
| Total assets under management | $ | 265,729 | $ | 225,997 | 18% | ||||||||||||
| Client assets under administration | 1,351,307 | 1,128,325 | 20% | ||||||||||||||
| Total assets | $ | 1,617,036 | $ | 1,354,322 | 19% | ||||||||||||
| Private Banks: | |||||||||||||||||
| Equity and fixed-income programs | $ | 32,520 | $ | 27,839 | 17% | ||||||||||||
| Collective trust fund programs | 4 | 3 | 33% | ||||||||||||||
| Liquidity funds | 1,709 | 2,796 | (39)% | ||||||||||||||
| Total assets under management | $ | 34,233 | $ | 30,638 | 12% | ||||||||||||
| Client assets under administration | 9,405 | 8,431 | 12% | ||||||||||||||
| Total assets | $ | 43,638 | $ | 39,069 | 12% | ||||||||||||
| Investment Advisors: | |||||||||||||||||
| Equity and fixed-income programs | $ | 94,390 | $ | 80,618 | 17% | ||||||||||||
| Liquidity funds | 3,391 | 3,457 | (2)% | ||||||||||||||
| Total Platform assets under management | $ | 97,781 | $ | 84,075 | 16% | ||||||||||||
| Platform-only assets | 38,308 | 29,848 | 28% | ||||||||||||||
| Platform-only assets-deposit program | 2,358 | 2,155 | 9% | ||||||||||||||
| Total Platform assets | $ | 138,447 | $ | 116,078 | 19% | ||||||||||||
| Institutional Investors: | |||||||||||||||||
| Equity and fixed-income programs | $ | 86,690 | $ | 80,112 | 8% | ||||||||||||
| Liquidity funds | 1,559 | 1,768 | (12)% | ||||||||||||||
| Total assets under management | $ | 88,249 | $ | 81,880 | 8% | ||||||||||||
| Client assets under advisement | 3,790 | 6,090 | (38)% | ||||||||||||||
| Total assets | $ | 92,039 | $ | 87,970 | 5% | ||||||||||||
| Investments in New Businesses: | |||||||||||||||||
| Equity and fixed-income programs | $ | 3,351 | $ | 2,867 | 17% | ||||||||||||
| Liquidity funds | 236 | 244 | (3)% | ||||||||||||||
| Total assets under management | $ | 3,587 | $ | 3,111 | 15% | ||||||||||||
| Client assets under advisement | 2,506 | 2,593 | (3)% | ||||||||||||||
| Total assets | $ | 6,093 | $ | 5,704 | 7% | ||||||||||||
| LSV: | |||||||||||||||||
| Equity and fixed-income programs (B) | $ | 117,146 | $ | 91,795 | 28% | ||||||||||||
| Stratos (E) | $ | 41,889 | $ | — | NM | ||||||||||||
| Total: | |||||||||||||||||
| Equity and fixed-income programs (C) | $ | 334,097 | $ | 283,231 | 18% | ||||||||||||
| Collective trust fund programs | 265,269 | 225,693 | 18% | ||||||||||||||
| Liquidity funds | 7,359 | 8,572 | (14)% | ||||||||||||||
| Total assets under management | $ | 606,725 | $ | 517,496 | 17% | ||||||||||||
| Client assets under advisement | 6,296 | 8,683 | (27)% | ||||||||||||||
| Client assets under administration (D) | 1,360,712 | 1,136,756 | 20% | ||||||||||||||
| Platform-only assets | 40,666 | 32,003 | 27% | ||||||||||||||
| Stratos | 41,889 | — | NM | ||||||||||||||
| Total assets | $ | 2,056,288 | $ | 1,694,938 | 21% | ||||||||||||
| Three Months Ended June 30, | Percent Change | Six Months Ended June 30, | Percent Change | ||||||||||||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||||||||||||
| Investment Managers: | |||||||||||||||||||||||||||||||||||
| Collective trust fund programs (A) | $ | 259,655 | $ | 215,085 | 21% | $ | 254,253 | $ | 211,903 | 20% | |||||||||||||||||||||||||
| Liquidity funds | 506 | 288 | 76% | 536 | 272 | 97% | |||||||||||||||||||||||||||||
| Total assets under management | $ | 260,161 | $ | 215,373 | 21% | $ | 254,789 | $ | 212,175 | 20% | |||||||||||||||||||||||||
| Client assets under administration | 1,332,630 | 1,098,925 | 21% | 1,306,606 | 1,080,104 | 21% | |||||||||||||||||||||||||||||
| Total assets | $ | 1,592,791 | $ | 1,314,298 | 21% | $ | 1,561,395 | $ | 1,292,279 | 21% | |||||||||||||||||||||||||
| Private Banks: | |||||||||||||||||||||||||||||||||||
| Equity and fixed-income programs | $ | 32,005 | $ | 26,533 | 21% | $ | 31,351 | $ | 26,214 | 20% | |||||||||||||||||||||||||
| Collective trust fund programs | 4 | 3 | 33% | 4 | 4 | —% | |||||||||||||||||||||||||||||
| Liquidity funds | 1,717 | 2,771 | (38)% | 1,934 | 2,866 | (33)% | |||||||||||||||||||||||||||||
| Total assets under management | $ | 33,726 | $ | 29,307 | 15% | $ | 33,289 | $ | 29,084 | 14% | |||||||||||||||||||||||||
| Client assets under administration | 9,455 | 8,266 | 14% | 9,369 | 8,377 | 12% | |||||||||||||||||||||||||||||
| Total assets | $ | 43,181 | $ | 37,573 | 15% | $ | 42,658 | $ | 37,461 | 14% | |||||||||||||||||||||||||
| Investment Advisors: | |||||||||||||||||||||||||||||||||||
| Equity and fixed-income programs | $ | 92,424 | $ | 76,629 | 21% | $ | 90,414 | $ | 76,958 | 17% | |||||||||||||||||||||||||
| Liquidity funds | 3,338 | 3,464 | (4)% | 3,428 | 3,292 | 4% | |||||||||||||||||||||||||||||
| Total Platform assets under management | $ | 95,762 | $ | 80,093 | 20% | $ | 93,842 | $ | 80,250 | 17% | |||||||||||||||||||||||||
| Platform-only assets | 36,768 | 27,288 | 35% | 35,627 | 26,614 | 34% | |||||||||||||||||||||||||||||
| Platform-only assets-deposit program | 2,273 | 2,152 | 6% | 2,291 | 2,170 | 6% | |||||||||||||||||||||||||||||
| Total Platform assets | $ | 134,803 | $ | 109,533 | 23% | $ | 131,760 | $ | 109,034 | 21% | |||||||||||||||||||||||||
| Institutional Investors: | |||||||||||||||||||||||||||||||||||
| Equity and fixed-income programs | $ | 85,302 | $ | 77,843 | 10% | $ | 84,848 | $ | 77,169 | 10% | |||||||||||||||||||||||||
| Liquidity funds | 1,702 | 1,853 | (8)% | 1,822 | 1,754 | 4% | |||||||||||||||||||||||||||||
| Total assets under management | $ | 87,004 | $ | 79,696 | 9% | $ | 86,670 | $ | 78,923 | 10% | |||||||||||||||||||||||||
| Client assets under advisement | 3,703 | 5,841 | (37)% | 3,680 | 5,791 | (36)% | |||||||||||||||||||||||||||||
| Total assets | $ | 90,707 | $ | 85,537 | 6% | $ | 90,350 | $ | 84,714 | 7% | |||||||||||||||||||||||||
| Investments in New Businesses: | |||||||||||||||||||||||||||||||||||
| Equity and fixed-income programs | $ | 3,260 | $ | 2,732 | 19% | $ | 3,183 | $ | 2,767 | 15% | |||||||||||||||||||||||||
| Liquidity funds | 258 | 244 | 6% | 289 | 259 | 12% | |||||||||||||||||||||||||||||
| Total assets under management | $ | 3,518 | $ | 2,976 | 18% | $ | 3,472 | $ | 3,026 | 15% | |||||||||||||||||||||||||
| Client assets under administration (E) | — | 14,917 | (100)% | — | 14,774 | (100)% | |||||||||||||||||||||||||||||
| Client assets under advisement | 2,425 | 2,329 | 4% | 2,380 | 2,267 | 5% | |||||||||||||||||||||||||||||
| Total assets | $ | 5,943 | $ | 20,222 | (71)% | $ | 5,852 | $ | 20,067 | (71)% | |||||||||||||||||||||||||
| LSV: | |||||||||||||||||||||||||||||||||||
| Equity and fixed-income programs (B) | $ | 115,862 | $ | 89,422 | 30% | $ | 110,241 | $ | 88,606 | 24% | |||||||||||||||||||||||||
| Stratos (F) | $ | 40,559 | $ | — | NM | $ | 39,938 | $ | — | NM | |||||||||||||||||||||||||
| Total: | |||||||||||||||||||||||||||||||||||
| Equity and fixed-income programs (C) | $ | 328,853 | $ | 273,159 | 20% | $ | 320,037 | $ | 271,714 | 18% | |||||||||||||||||||||||||
| Collective trust fund programs | 259,659 | 215,088 | 21% | 254,257 | 211,907 | 20% | |||||||||||||||||||||||||||||
| Liquidity funds | 7,521 | 8,620 | (13)% | 8,009 | 8,443 | (5)% | |||||||||||||||||||||||||||||
| Total assets under management | $ | 596,033 | $ | 496,867 | 20% | $ | 582,303 | $ | 492,064 | 18% | |||||||||||||||||||||||||
| Client assets under advisement | 6,128 | 8,170 | (25)% | 6,060 | 8,058 | (25)% | |||||||||||||||||||||||||||||
| Client assets under administration (D) | 1,342,085 | 1,122,108 | 20% | 1,315,975 | 1,103,255 | 19% | |||||||||||||||||||||||||||||
| Platform-only assets | 39,041 | 29,440 | 33% | 37,918 | 28,784 | 32% | |||||||||||||||||||||||||||||
| Stratos | 40,559 | — | NM | 39,938 | — | NM | |||||||||||||||||||||||||||||
| Total assets | $ | 2,023,846 | $ | 1,656,585 | 22% | $ | 1,982,194 | $ | 1,632,161 | 21% | |||||||||||||||||||||||||
| Three Months Ended June 30, | Percent Change | Six Months Ended June 30, | Percent Change | ||||||||||||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||||||||||||
| Investment Managers: | |||||||||||||||||||||||||||||||||||
| Revenues | $ | 227,679 | $ | 195,067 | 17% | $ | 448,396 | $ | 387,115 | 16% | |||||||||||||||||||||||||
| Expenses | 136,078 | 121,636 | 12% | 269,917 | 238,847 | 13% | |||||||||||||||||||||||||||||
| Operating Profit | $ | 91,601 | $ | 73,431 | 25% | $ | 178,479 | $ | 148,268 | 20% | |||||||||||||||||||||||||
| Operating Margin | 40 | % | 38 | % | 40 | % | 38 | % | |||||||||||||||||||||||||||
| Private Banks: | |||||||||||||||||||||||||||||||||||
| Revenues | $ | 156,879 | $ | 141,449 | 11% | $ | 309,141 | $ | 279,163 | 11% | |||||||||||||||||||||||||
| Expenses | 125,220 | 118,724 | 5% | 245,251 | 233,473 | 5% | |||||||||||||||||||||||||||||
| Operating Profit | $ | 31,659 | $ | 22,725 | 39% | $ | 63,890 | $ | 45,690 | 40% | |||||||||||||||||||||||||
| Operating Margin | 20 | % | 16 | % | 21 | % | 16 | % | |||||||||||||||||||||||||||
| Investment Advisors: | |||||||||||||||||||||||||||||||||||
| Revenues | $ | 177,897 | $ | 137,193 | 30% | $ | 347,592 | $ | 273,769 | 27% | |||||||||||||||||||||||||
| Expenses | 101,866 | 75,801 | 34% | 198,223 | 148,256 | 34% | |||||||||||||||||||||||||||||
| Non-controlling interest and other, net | 1,361 | — | NM | 2,698 | — | NM | |||||||||||||||||||||||||||||
| Operating Profit | $ | 74,670 | $ | 61,392 | 22% | $ | 146,671 | $ | 125,513 | 17% | |||||||||||||||||||||||||
| Operating Margin | 42 | % | 45 | % | 42 | % | 46 | % | |||||||||||||||||||||||||||
| Institutional Investors: | |||||||||||||||||||||||||||||||||||
| Revenues | $ | 69,702 | $ | 69,343 | 1% | $ | 141,218 | $ | 137,849 | 2% | |||||||||||||||||||||||||
| Expenses | 36,826 | 35,857 | 3% | 73,963 | 71,727 | 3% | |||||||||||||||||||||||||||||
| Operating Profit | $ | 32,876 | $ | 33,486 | (2)% | $ | 67,255 | $ | 66,122 | 2% | |||||||||||||||||||||||||
| Operating Margin | 47 | % | 48 | % | 48 | % | 48 | % | |||||||||||||||||||||||||||
| Investments in New Businesses: | |||||||||||||||||||||||||||||||||||
| Revenues | $ | 9,460 | $ | 16,549 | (43)% | $ | 17,453 | $ | 33,049 | (47)% | |||||||||||||||||||||||||
| Expenses | 10,039 | 18,430 | (46)% | 19,232 | 36,926 | (48)% | |||||||||||||||||||||||||||||
| Operating Loss | $ | (579) | $ | (1,881) | (69)% | $ | (1,779) | $ | (3,877) | (54)% | |||||||||||||||||||||||||
| Three Months Ended June 30, | Percent Change | Six Months Ended June 30, | Percent Change | ||||||||||||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||||||||||||
| Revenues: | |||||||||||||||||||||||||||||||||||
| Information processing and software servicing fees | $ | 118,161 | $ | 107,225 | 10% | $ | 233,504 | $ | 212,424 | 10% | |||||||||||||||||||||||||
| Asset management, administration & distribution fees | 38,718 | 34,224 | 13% | 75,637 | 66,739 | 13% | |||||||||||||||||||||||||||||
| Total revenues | $ | 156,879 | $ | 141,449 | 11% | $ | 309,141 | $ | 279,163 | 11% | |||||||||||||||||||||||||
| Three Months Ended June 30, | Percent Change | Six Months Ended June 30, | Percent Change | ||||||||||||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||||||||||||
| Revenues: | |||||||||||||||||||||||||||||||||||
| Investment management fees-SEI fund programs | $ | 59,967 | $ | 54,075 | 11% | $ | 118,203 | $ | 109,179 | 8% | |||||||||||||||||||||||||
| Separately managed account fees | 73,799 | 53,914 | 37% | 141,053 | 105,991 | 33% | |||||||||||||||||||||||||||||
| Other fees | 44,131 | 29,204 | 51% | 88,336 | 58,599 | 51% | |||||||||||||||||||||||||||||
| Total revenues | $ | 177,897 | $ | 137,193 | 30% | $ | 347,592 | $ | 273,769 | 27% | |||||||||||||||||||||||||
| Three Months Ended June 30, | Percent Change | Six Months Ended June 30, | Percent Change | ||||||||||||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||||||||||||
| Revenues: | |||||||||||||||||||||||||||||||||||
| SEI Private Wealth Management | $ | 6,085 | $ | 5,423 | 12% | $ | 12,055 | $ | 10,672 | 13% | |||||||||||||||||||||||||
| SEI Family Office Services | — | 8,912 | (100)% | — | 18,002 | (100)% | |||||||||||||||||||||||||||||
| Other | 3,375 | 2,214 | 52% | 5,398 | 4,375 | 23% | |||||||||||||||||||||||||||||
| Total revenues | $ | 9,460 | $ | 16,549 | (43)% | $ | 17,453 | $ | 33,049 | (47)% | |||||||||||||||||||||||||
| Three Months Ended June 30, | Six Months Ended June 30, | ||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||
| Net gain from investments | $ | 3,550 | $ | 1,759 | $ | 3,181 | $ | 2,252 | |||||||||||||||
| Interest and dividend income | 7,012 | 9,283 | 14,174 | 19,504 | |||||||||||||||||||
| Interest expense | (562) | (92) | (1,035) | (277) | |||||||||||||||||||
| Gain on sale of business | — | 94,412 | — | 94,412 | |||||||||||||||||||
| Other income | — | 4,500 | 450 | 4,500 | |||||||||||||||||||
| Equity in earnings of unconsolidated affiliates | 38,694 | 33,640 | 71,170 | 62,387 | |||||||||||||||||||
| Net gain from consolidated variable interest entities | 7,475 | — | 9,554 | — | |||||||||||||||||||
| Total other income and expense items, net | $ | 56,169 | $ | 143,502 | $ | 97,494 | $ | 182,778 | |||||||||||||||
| Three Months Ended June 30, | Percent Change | Six Months Ended June 30, | Percent Change | ||||||||||||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||||||||||||
| Revenues of LSV | $ | 140,854 | $ | 114,215 | 23% | $ | 256,308 | $ | 214,143 | 20% | |||||||||||||||||||||||||
| Net income of LSV | 99,502 | 87,311 | 14% | 182,799 | 161,825 | 13% | |||||||||||||||||||||||||||||
| SEI's proportionate share in earnings of LSV | $ | 38,264 | $ | 33,640 | 14% | $ | 70,356 | $ | 62,387 | 13% | |||||||||||||||||||||||||
| Three Months Ended June 30, | Percent Change | Six Months Ended June 30, | Percent Change | ||||||||||||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||||||||||||
| Capitalized software development costs | $ | 9,117 | $ | 7,198 | 27% | $ | 18,189 | $ | 14,395 | 26% | |||||||||||||||||||||||||
| Intangible assets acquired through acquisitions and asset purchases | 9,935 | 3,157 | 215% | 19,132 | 6,606 | 190% | |||||||||||||||||||||||||||||
| Other | $ | 85 | $ | 94 | (10)% | 170 | 158 | 8% | |||||||||||||||||||||||||||
| Total amortization expense | $ | 19,137 | $ | 10,449 | 83% | $ | 37,491 | $ | 21,159 | 77% | |||||||||||||||||||||||||
| Three Months Ended June 30, | Percent Change | Six Months Ended June 30, | Percent Change | ||||||||||||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||||||||||||
| Provision for income taxes | $ | 53,645 | $ | 65,054 | (18)% | $ | 107,669 | $ | 109,910 | (2)% | |||||||||||||||||||||||||
| Effective income tax rate | 21.2 | % | 22.3 | % | 22.3 | % | 22.5 | % | |||||||||||||||||||||||||||
| Three Months Ended June 30, | Six Months Ended June 30, | ||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||
| Net income attributable to SEI Investments Company (U.S. GAAP basis) | $ | 195,658 | $ | 227,083 | $ | 370,145 | $ | 378,600 | |||||||||||||||
| Non-GAAP adjustments: | |||||||||||||||||||||||
| Acquisition-related: | |||||||||||||||||||||||
Third party costs(1) | — | 820 | — | 820 | |||||||||||||||||||
Intangible assets amortization & impairments(2) | 7,057 | 3,157 | 13,691 | 6,606 | |||||||||||||||||||
| Total acquisition-related | 7,057 | 3,977 | 13,691 | 7,426 | |||||||||||||||||||
Gain on sale of asset/business(3) | — | (94,412) | — | (94,412) | |||||||||||||||||||
Litigation settlements and insurance proceeds(4) | 3,808 | (4,500) | 3,808 | (4,500) | |||||||||||||||||||
Income tax effect(5) | (2,338) | 21,142 | (3,891) | 20,354 | |||||||||||||||||||
| Adjusted net income attributable to SEI Investments Company (non-GAAP basis) | $ | 204,185 | $ | 153,290 | $ | 383,753 | $ | 307,468 | |||||||||||||||
| Diluted earnings per common share (U.S. GAAP basis) | $ | 1.59 | $ | 1.78 | $ | 2.99 | $ | 2.95 | |||||||||||||||
| Adjusted diluted earnings per common share (non-GAAP basis) | $ | 1.66 | $ | 1.20 | 3.10 | 2.40 | |||||||||||||||||
| Diluted weighted average shares outstanding | 123,334 | 127,278 | 123,914 | 128,364 | |||||||||||||||||||
| Three Months Ended June 30, | Six Months Ended June 30, | ||||||||||||||||||||||
| 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||
| Income from operations (U.S. GAAP Basis) | 197,016 | 148,635 | 386,502 | 305,732 | |||||||||||||||||||
| Non-GAAP adjustments: | |||||||||||||||||||||||
| Acquisition-related: | |||||||||||||||||||||||
Third party costs(1) | — | 820 | — | 820 | |||||||||||||||||||
Intangible assets amortization & impairments(2) | 9,935 | 3,157 | 19,132 | 6,606 | |||||||||||||||||||
| Total acquisition-related | 9,935 | 3,977 | 19,132 | 7,426 | |||||||||||||||||||
| Adjusted income from operations (non-GAAP Basis) | $ | 206,951 | $ | 152,612 | $ | 405,634 | $ | 313,158 | |||||||||||||||
| Six Months Ended June 30, | |||||||||||
| 2026 | 2025 | ||||||||||
| Net cash provided by operating activities | $ | 347,367 | $ | 243,005 | |||||||
| Net cash provided by investing activities | 16,863 | 65,268 | |||||||||
| Net cash used in financing activities | (356,918) | (419,220) | |||||||||
| Effect of exchange rate changes on cash and cash equivalents | (5,406) | 17,103 | |||||||||
| Net change in cash and cash equivalents and cash and cash equivalents held at consolidated variable interest entities | 1,906 | (93,844) | |||||||||
| Cash, cash equivalents and cash and cash equivalents held at consolidated variable interest entities, beginning of period | 470,595 | 840,193 | |||||||||
| Cash, cash equivalents and cash and cash equivalents held at consolidated variable interest entities, end of period | $ | 472,501 | $ | 746,349 | |||||||
| Six Months Ended June 30, | |||||||||||
| 2026 | 2025 | ||||||||||
| Purchases | $ | (81,568) | $ | (85,681) | |||||||
| Sales and maturities | 105,985 | 65,168 | |||||||||
| Net investing activities from marketable securities | $ | 24,417 | $ | (20,513) | |||||||
| Period | Total Number of Shares Purchased | Average Price Paid per Share (1) | Total Number of Shares Purchased as Part of Publicly Announced Program | Approximate Dollar Value of Shares that May Yet Be Purchased Under the Program | |||||||||||||||||||
| April 2026 | 491,000 | $ | 81.53 | 491,000 | $ | 455,116,000 | |||||||||||||||||
| May 2026 | 330,000 | 90.85 | 330,000 | 425,116,000 | |||||||||||||||||||
| June 2026 | 472,000 | 89.04 | 472,000 | 382,748,000 | |||||||||||||||||||
| Total | 1,293,000 | $ | 86.65 | 1,293,000 | |||||||||||||||||||
| 31.1 | |||||
| 31.2 | |||||
| 32 | |||||
| 101.INS | XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document. | ||||
| 101.SCH | XBRL Taxonomy Extension Schema Document | ||||
| 101.CAL | XBRL Taxonomy Extension Calculation Linkbase Document | ||||
| 101.DEF | XBRL Taxonomy Extension Definition Linkbase Document | ||||
| 101.LAB | XBRL Taxonomy Extension Label Linkbase Document | ||||
| 101.PRE | XBRL Taxonomy Extension Presentation Linkbase Document | ||||
| SEI INVESTMENTS COMPANY | ||||||||||||||
| Date: | July 27, 2026 | By: | /s/ Sean J. Denham | |||||||||||
| Sean J. Denham | ||||||||||||||
| Chief Financial and Chief Operating Officer | ||||||||||||||
| /s/ Ryan P. Hicke | ||
| Ryan P. Hicke | ||
| Chief Executive Officer | ||
| /s/ Sean J. Denham | ||
| Sean J. Denham | ||
| Chief Financial and Chief Operating Officer | ||
| Date: | July 27, 2026 | Date: | July 27, 2026 | |||||||||||
| /s/ Ryan P. Hicke | /s/ Sean J. Denham | |||||||||||||
| Ryan P. Hicke | Sean J. Denham | |||||||||||||
| Chief Executive Officer | Chief Financial and Chief Operating Officer | |||||||||||||