# EDGAR Filing Document

**Accession Number:** 0000350894
**File Stem:** 0000350894-25-000126
**Filing Date:** 2025-12
**Character Count:** 11579
**Document Hash:** 3c09c914a7f941253b48feca6ebfa803
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000350894-25-000126.hdr.sgml**: 20251217

**ACCESSION NUMBER**: 0000350894-25-000126

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 16

**CONFORMED PERIOD OF REPORT**: 20251212

**ITEM INFORMATION**: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20251217

**DATE AS OF CHANGE**: 20251217

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SEI INVESTMENTS CO
- **CENTRAL INDEX KEY:** 0000350894
- **STANDARD INDUSTRIAL CLASSIFICATION:** SECURITY BROKERS, DEALERS & FLOTATION COMPANIES [6211]
- **ORGANIZATION NAME:** 09 Crypto Assets
- **EIN:** 231707341
- **STATE OF INCORPORATION:** PA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-10200
- **FILM NUMBER:** 251577328

**BUSINESS ADDRESS:**
- **STREET 1:** 1 FREEDOM VALLEY DRIVE
- **CITY:** OAKS
- **STATE:** PA
- **ZIP:** 19456-1100
- **BUSINESS PHONE:** 6106761000

**MAIL ADDRESS:**
- **STREET 1:** 1 FREEDOM VALLEY DRIVE
- **CITY:** OAKS
- **STATE:** PA
- **ZIP:** 19456-1100

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** SEI INVESTMENT CO
- **DATE OF NAME CHANGE:** 20040806

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** SEI CORP
- **DATE OF NAME CHANGE:** 19920703

?xml version='1.0' encoding='ASCII'? seic-20251212

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

________________________________________

**FORM 8-K** 

________________________________________

**CURRENT REPORT**

**PURSUANT TO SECTION 13 OR 15(D)**

**OF THE SECURITIES EXCHANGE ACT OF 1934**

**December 12, 2025** 

**Date of report (Date of earliest event reported)**

________________________________________

![SEILogo.jpg](seic-20251212_g1.jpg)

________________________________________

**SEI INVESTMENTS COMPANY** 

**(Exact name of registrant as specified in its charter)**

________________________________________

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| | | |
|:---|:---|:---|
| **Pennsylvania** | **0-10200** | **23-1707341** |
| **(State or Other Jurisdiction**<br>**of Incorporation)** | **(Commission<br>File Number)** | **(I.R.S. Employer<br>Identification No.)** |

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**1 Freedom Valley Drive** 

**Oaks, Pennsylvania 19456** 

**(Address of Principal Executive Offices and Zip Code)**

**(610) 676-1000** 

**(Registrant's Telephone Number, Including Area Code)**

________________________________________

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

**Securities registered pursuant to Section 12(b) of the Act:**

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| | | |
|:---|:---|:---|
| **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 |

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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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**Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.**

On December 12, 2025, Alfred P. West, Jr., who founded SEI Investments Company (the "Company") in 1968 and following that served as the Company's chief executive officer for more than 50 years and most recently as Executive Chairman of the Board of Directors (the "Board"), tendered his resignation as a member of the Board and as an officer of the Company and its subsidiaries and affiliates, effective January 1, 2026. Mr. West indicated that his resignation was not because of a disagreement with the Company on any matter relating to the Company's operations, policies or practices.

In order to avail the Board as well as the management and employees of the Company the continued benefit of Mr. West's guidance, direction and support in furtherance of the Company's operational and strategic success, the Board appointed Mr. West to serve, effective upon his resignation, as the non-voting Chairman Emeritus of the Board.

The Board also appointed current independent member Carl Guarino to serve as the non-executive Chairman of the Board, effective upon Mr. West's resignation, and reduced the size of the Board from nine members to eight, also effective upon Mr. West's resignation.

A press release relating to Mr. West's resignation and Mr. Guarino's appointment, issued December 17, 2025, is filed as Exhibit 99.1 to this Current Report on Form 8-K.

**Item 8.01. Other Events.**

Also on December 12, 2025, the Board of Directors of SEI Investments Company declared a dividend of $0.52 per share. The cash dividend will be payable to shareholders of record on December 29, 2025 with a payment date of January 12, 2026.

**Item 9.01.**&nbsp;&nbsp;&nbsp;&nbsp;**Financial Statements and Exhibits.**

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| | |
|:---|:---|
| <u>Exhibit No.</u> | <u>Description</u> |
| 99.1 | <u>[Press Release dated December 17, 2025 of SEI Investments Company](boardtransitionrls121625.htm)</u>  |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |

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**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | | | |
|:---|:---|:---|:---|
| | | SEI INVESTMENTS COMPANY | SEI INVESTMENTS COMPANY |
| Date: | December 17, 2025 | By: | /s/ Sean J. Denham |
|  |  |  | Sean J. Denham<br>Chief Financial and Chief Operating Officer |

---

## Exhibit 99.1

![](boardtransitionrls121625001.jpg)

&nbsp;&nbsp;&nbsp;&nbsp;© 2025 SEI® 1 Investor Contact: Media Contact: Brad Burke Alicia Rudd SEI SEI +1 610-676-5350 +1 610-676-3887 bburke2@seic.com arudd@seic.com Pages: 2 FOR IMMEDIATE RELEASE SEI Honors Founder Alfred P. West, Jr. as He Retires from Executive Chairman Role After 57 Years of Innovation Board Appoints Independent Director Carl A. Guarino as Chairman as Part of Planned Transition OAKS, Pa., Dec. 17, 2025 – SEI® (NASDAQ: SEIC) today celebrates the extraordinary career of Alfred P. West, Jr., the company's founder and Executive Chairman of the Board, who resigned from his role as a director and board chair as part of a planned transition effective Jan. 1, 2026. The Board has appointed Carl A. Guarino, an independent director of SEI's Board, as Chairman effective Jan. 1, 2026. West will become Chairman Emeritus, a lifelong appointed position. West founded SEI Investments in 1968 and served as CEO for 54 years, scaling the small Pennsylvania- based financial technology startup, with the industry's first computer-based commercial credit simulator, into a global publicly traded company that manages, advises, or administers approximately $1.8 trillion in assets with more than $2.1 billion in annual revenues. As Executive Chairman since 2022, West has continued to provide strategic vision, industry expertise, and an unwavering commitment to the company and broader community, all of which have guided SEI's growth and success. West, SEI Founder and Executive Chairman of the Board, said: "Over 50 years ago, I founded SEI with the mission to use technology to transform the financial sector and create a dynamic, team-oriented work environment. In the decades since, I'm proud to say I have had the privilege of working with thousands of talented employees, clients, and partners, all of whom have helped make this ambitious dream a reality. I'm deeply grateful to and have full faith in Carl, Ryan, and the rest of the Board and leadership team as they work to build on this strong foundation and usher in a new era of innovation and success. I look forward to following their continued success and supporting SEI from the sidelines as its forever biggest fan." Commenting on West's more than 50-year career leading and growing SEI, CEO Ryan Hicke said: Press release.

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![](boardtransitionrls121625002.jpg)© 2025 SEI 2 "Al is a true visionary and his passion for not only embracing change, but leading it, has been the foundation of SEI's success. From my first day as an SEI intern almost 30 years ago to now serving as CEO, I have witnessed firsthand the impact of Al's collaborative leadership, deep humility, and courage to think differently, and he will remain a close advisor and mentor to me. His values underpin everything we do here at SEI and have helped establish us as the global leader we are today. On behalf of the Board and all our team members at SEI, I want to thank Al for his lifelong dedication and leadership and wish him the best in his retirement. "In addition, we are excited to welcome Carl to the role of Chairman. He is a proven leader in our industry, and I look forward to working closely together and benefiting from his guidance as we continue to transform SEI for the future." Guarino, Independent Director and incoming Chairman of the Board, said: "It's an honor to step into the role of Chairman and build on the legacy Al has created. I have tremendous respect for SEI's team, commitment to innovation, and trusted relationships with the clients we serve, having spent years as both an employee and director of our company. I look forward to continuing to work with Ryan and the rest of the team to deliver long-term value for our clients, employees, and shareholders." About Carl A. Guarino Carl Guarino joined the SEI Board as an independent director in 2014 and serves as chair of SEI's compensation and nominating committees. He brings nearly 40 years of executive leadership experience and industry expertise. He most recently served as CEO of WizeHive, Inc., a SaaS company that provides a platform for managing grants, scholarships, and employee giving solutions, from June 2017 until late 2024. From 2006 to 2014, he was CEO of Procurian Inc., a provider of procurement outsourcing services to Fortune 1000 firms. Prior to 2006, Guarino served as Executive Vice President and head of SEI's Investment Advisors segment. 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 Sept. 30, 2025, SEI manages, advises, or administers approximately $1.8 trillion in assets. For more information, visit seic.com. ###

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