OAKS, Pa., Apr. 22, 2026 – SEI Investments Company (NASDAQ:SEIC) today announced financial results for the first quarter 2026. Relative to the first quarter 2025, EPS increased by 20%, and revenue and operating income grew by 13% and 21%, respectively, with operating margin increasing to 30%. On an adjusted basis, EPS and operating income grew 21% and 24%, respectively, with the adjusted operating margin increasing to 32%.

(1) See Non-GAAP Information and Reconciliations on pgs 10-11

“We began 2026 with a defining quarter for SEI, validating our strategy, execution, and the scalability of our operating model. We delivered strong earnings growth, meaningful margin expansion, and incredible sales results, driven by broad-based momentum across our core growth engines," said CEO Ryan Hicke.

"Client demand for outsourcing, technology and administrative excellence, and professional services continues to accelerate. Additionally, evidence of progress in asset management is building, and our ongoing investment in AI and automation is strengthening the foundation of a more nimble, innovative, scalable, and resilient enterprise. We believe SEI is well positioned to deliver sustained value for our clients, employees, and shareholders.”

(A) Primarily includes non-controlling interest and earnings from equity method investments.

(B) Excludes non-controlling interests and other, net

* Variances noted "NM" indicate the percent change is not meaningful.

•SEI started the year with strong quarterly performance, achieving diluted EPS of $1.40, up 20% from the prior year. On an adjusted basis, EPS increased by 21% relative to the prior year, driven by strong topline growth and margin expansion across SEI's businesses.

•First quarter net sales events totaled $67.2 million, with $57.1 million of that total being recurring; both the total sales events and recurring sales events represent record levels for SEI.

◦Private Banks net sales events totaled $6.5 million, reflecting continued demand across SEI’s full suite of capabilities, including enterprise‑wide professional services, implementation services, and the SEI Wealth PlatformSM. Of the $4.0 million of net sales events within Investments in New Businesses, $1.4 million were won in partnership with Private Banking.

◦Investment Managers led the quarter with $50.5 million of net sales events, driven by multiple enterprise-level mandates with first-time outsourcers. These larger wins were supplemented with contributions from both the IMS traditional and alternatives business, both in the US and globally.

◦Investment Advisors net sales events of $7.0 million demonstrate continued progress in SEI's asset management offering, with Q1 momentum driven by ETFs, SMAs, and custody-only solutions. Institutional Investors recorded negative $2.9 million of net sales events, driven by a large defined benefit client meeting their funding objectives and annuitizing their plan.

•Consolidated revenues and operating income increased by 13% and 21%, respectively, from Q1 2025. On an adjusted basis, operating income increased by 24% from Q1 2025, with SEI's adjusted operating margin increasing to 32%, up 281 bps. Across all business segments, both revenue and operating profit increased vs. Q1 2025.

◦Private Banking revenue increased 11% and operating margins increased 449 bps vs. Q1 2025, driving operating profit 40% higher. Strong growth reflects a growing contribution from professional services, including the record wins achieved in Q4 of last year, and continued execution against Private Banking's five-pillar margin enhancement strategy.

◦Investment Managers delivered double-digit revenue and operating profit growth vs. last year, as sales event momentum translates into financial performance. The slight margin decline vs. Q4 2025 was expected and primarily driven by the Q4 2025 revenue accrual true-up which did not recur in first quarter.

◦Investment Advisors posted 24% revenue and 12% operating profit growth versus the prior year, although comparisons are impacted by the first full quarter of Stratos results. During the quarter, Stratos contributed $19.0 million to revenue and $3.1 million to operating profit, which includes $6.0 million of expense associated with acquired intangible asset amortization, before considering non-controlling interest. SEI's integrated cash program contributed $20.4 million, consistent with Q3 2025 and Q4 2025.

◦Institutional Investors generated single-digit revenue and operating profit growth compared to the prior year driven by market appreciation and cost discipline.

•Ending assets under administration increased by 4%, and ending assets under management was flat from Q4 to Q1. AUA growth was driven primarily by strong client win momentum. Ending AUM as of Q1 was essentially flat with Q4, as healthy net inflows in Advisors offset market depreciation in March.

•SEI repurchased 2.6 million shares of common stock for $208.3 million during the first quarter 2026 at an average price of $81.55 per share.

A conference call and presentation to review earnings is scheduled for 5 p.m. Eastern time on
Apr. 22, 2026. Analysts and investors are invited to join the call by completing the registration form. The public is invited to review the presentation and listen to the call and replay at ir.seic.com/events-presentations/events.

Link for registration form: https://register-conf.media-server.com/register/BI47d1ce35e5544d58aa8cc411a54ff9cf

About SEI®

SEI (NASDAQ:SEIC) is a leading global provider of financial technology, operations, and asset management services within the financial services industry. SEI tailors its solutions and services to help clients more effectively deploy their capital—whether that’s money, time, or talent—so they can better serve their clients and achieve their growth objectives. As of Mar. 31, 2026, SEI manages, advises, or administers approximately $1.9 trillion in assets. For more information, visit seic.com.

This release contains forward-looking statements within the meaning or the rules and regulations of the Securities and Exchange Commission. In some cases you can identify forward-looking statements by terminology, such as "may," '"will," "can," "expect," "believe," "remain," and "continue" or "appear." Our forward-looking statements include our current expectations as to:

•the demand for our products and solutions;

•the degree to which our investments are strengthening the foundation of a more nimble, innovative, scalable and resilient enterprise;

•whether we are positioned to deliver sustained value for our clients, employees and shareholders; and

•when and if we will generate net annualized recurring revenues from sales events that occurred during the quarter, as well as the amount of any such revenue.

You should not place undue reliance on our forward-looking statements, as they are based on the current beliefs and expectations of our management and subject to significant risks and uncertainties, many of which are beyond our control or are subject to change. Although we believe the assumptions upon which we base our forward-looking statements are reasonable, they could be inaccurate. We undertake no obligation to update our forward-looking statements. Some of the risks and important factors that could cause actual results to differ from those described in our forward-looking statements can be found in the “Risk Factors” section of our Annual Report on Form 10-K for the year ended Dec. 31, 2025, filed with the Securities and Exchange Commission.

Investor contact:                        Media contact:                        

Brad Burke                            Alicia Rudd

+1 610-676-5350                        +1 610-676-3887

bburke2@seic.com                        arudd@seic.com

(In thousands) (Unaudited)

(A)Collective trust fund program assets in the Investment Managers segment are included in assets under management since SEI is the trustee. Fees earned on this product are less than fees earned on customized asset management programs.

(B)Equity and fixed-income programs include $1.4 billion of assets managed by LSV in which fees are based solely on performance and are not calculated as an asset-based fee (as of March 31, 2026).

(C)Equity and fixed-income programs include $8.3 billion of assets in various asset allocation funds (as of March 31, 2026).

(D)    In addition to the assets presented, SEI also administers an additional $13.3 billion in Funds of Funds assets on which SEI does not earn an administration fee (as of March 31, 2026).

(E)    Client assets under administration related to the Family Office Services business divested on June 30, 2025.

(F)    Stratos Wealth Holdings is a family of companies that provide financial services to $39.9 billion in client assets across business models and affiliation structures (as of February 28, 2026).

(A)    Collective trust fund program average assets in the Investment Managers segment are included in assets under management since SEI is the trustee. Fees earned on this product are less than fees earned on customized asset management programs.

(B)    Equity and fixed-income programs during first-quarter 2026 include $1.5 billion of average assets managed by LSV in which fees are based solely on performance and are not calculated as an asset-based fee.

(C)    Equity and fixed-income programs include $8.2 billion of average assets in various asset allocation funds during first-quarter 2026.

(D)    In addition to the assets presented, SEI also administers an additional $13.2 billion of average assets in Funds of Funds assets during first-quarter 2026 on which SEI does not earn an administration fee.

(E)    Client assets under administration related to the Family Office Services business divested on June 30, 2025.

(F)    Stratos Wealth Holdings is a family of companies that provide financial services to $39.1 billion in client assets across business models and affiliation structures during first-quarter 2026 through February 28, 2026.

We present certain non‑GAAP financial measures to supplement the consolidated financial statements prepared in accordance with GAAP. Management believes these measures provide useful information to investors by enhancing the understanding of our core operating performance and facilitating comparisons across reporting periods. These non‑GAAP measures are also used by our management to evaluate operating results, allocate resources, and assess performance against strategic objectives.

These non-GAAP financial measures should be viewed in addition to, and not as a substitute for, reported results prepared in accordance with GAAP.

The following schedules reconcile U.S. GAAP financial measures to non-GAAP financial measures for each quarter in 2026 and 2025:

The following schedules reconcile U.S. GAAP financial measures to Non-GAAP financial measures for each quarter in 2024: