UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K/A

 (Amendment No. 1)

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2023

OR

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

For the transition period from_________to ________

Commission File Number: 0-10200

________________________________________

________________________________________

SEI INVESTMENTS COMPANY

(Exact name of Registrant as Specified in Its Charter)

Pennsylvania	23-1707341
State or Other Jurisdiction of Incorporation or Organization	I.R.S. Employer Identification No.

1 Freedom Valley Drive

Oaks, PA 19456

(Address of Principal Executive Offices and Zip Code)

610-676-1000

(Registrant’s Telephone Number, Including Area Code)

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

Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock, par value $.01 per share	SEIC	The NASDAQ Stock Market LLC
		(The NASDAQ Global Select Market®)

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

None

(Title of class)

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒   No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. Yes  ☐    No ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).   Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
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.  ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).  Yes ☐  No  ☒

The aggregate market value of the voting common stock held by non-affiliates of the registrant was approximately $6.6 billion based on the closing price reported by NASDAQ on June 30, 2023 (the last business day of the registrant’s most recently completed second fiscal quarter). For purposes of making this calculation only, the registrant has defined affiliates as including all executive officers, directors and beneficial owners of more than 10% of the common stock of the registrant.

The number of shares outstanding of the registrant's common stock, as of the close of business on January 31, 2024:

Common Stock, $.01 par value 131,352,305

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the following documents are incorporated by reference herein:

1.    The definitive proxy statement relating to the registrant’s 2024 Annual Meeting of Shareholders, to be filed within 120 days after the end of the fiscal year covered by this annual report, is incorporated by reference in Part III hereof.

Explanatory Note:

We are filing this Amendment No. 1 on Form 10-K/A (“Amendment No. 1”) to our Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) on February 20, 2024 (“Original Form 10-K”) solely to correct a clerical error that resulted in incorrect date references contained in Note 3 and Note 6 of the Notes to Financial Statements for LSV Asset Management dated December 31, 2023 and 2022 filed with the Original Form 10-K as Exhibit 99.14. The clerical error does not change and has no effect on any of the financial presentations or information contained in or filed as an exhibit to the Original Form 10-K. The corrected document is filed as Exhibit 99.14 attached hereto.

This Amendment No. 1 does not reflect events occurring after the filing of the Original Form 10-K on February 20, 2024 and no attempt has been made in this Amendment No. 1 to modify or update other disclosures as presented in the Original Form 10-K. Accordingly, this Amendment No. 1 should be read in conjunction with the Original Form 10-K.

PART IV

Item 15. Exhibits, Financial Statement Schedules.

(a) (1) and (2)	Financial Statements and Financial Statement Schedules. The following is a list of the Consolidated Financial Statements of the Company and its subsidiaries and supplementary data filed as part of Item 8 hereof:
	Reports of Independent Registered Public Accounting Firm
	Consolidated Balance Sheets — December 31, 2023 and 2022
	Consolidated Statements of Operations — For the years ended December 31, 2023, 2022 and 2021
	Consolidated Statements of Comprehensive Income — For the years ended December 31, 2023, 2022 and 2021
	Consolidated Statements of Changes in Equity — For the years ended December 31, 2023, 2022 and 2021
	Consolidated Statements of Cash Flows — For the years ended December 31, 2023, 2022 and 2021
	Notes to Consolidated Financial Statements
	Schedule II - Valuation and Qualifying Accounts and Reserves — For the years ended December 31, 2023, 2022 and 2021
	All other schedules are omitted because they are not applicable, or not required, or because the required information is included in the Consolidated Financial Statements or notes thereto.
(a) (3)	Exhibits, Including Those Incorporated by Reference. The exhibits to this Report are listed on the accompanying index to exhibits and are incorporated herein by reference or are filed as part of this Amendment No. 1.

EXHIBIT INDEX

The following is a list of exhibits filed as part of this Amendment No. 1 to Form 10-K.

3.1	(P)	Articles of Incorporation of the Registrant as amended on January 21, 1983. (Incorporated by reference to exhibit 3.1 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 1982.)
3.1.2	(P)	Amendment to Articles of Incorporation of the Registrant, dated May 21, 1992. (Incorporated by reference to exhibit 3.1.2 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 1992.)
3.1.3	(P)	Amendment to Articles of Incorporation of the Registrant, dated May 26, 1994. (Incorporated by reference to exhibit 3.1.3 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 1994.)
3.1.4	(P)	Amendment to Articles of Incorporation of the Registrant, dated November 21, 1996. (Incorporated by reference to exhibit 3.1.4 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 1996.)
3.1.5		Amendment to Articles of Incorporation of the Registrant, dated February 14, 2001. (Incorporated by reference to exhibit 3.1.5 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2000.)
3.2		Amended and Restated By-Laws. (Incorporated by reference to exhibit 99.3 to the Registrant’s Current Report on Form 8-K dated March 31, 2022.)
4.2		Statement with Respect to Shares of a Domestic Corporation amending the designations of Series A Junior Participating Preferred Shares as a series of the Series Preferred Stock of the Company, dated January 6, 2009. (Incorporated by reference to exhibit 3.1 to the Registrant’s Current Report on Form 8-K dated January 6, 2009.)
		Note: Exhibits 10.1 through 10.13 constitute the management contracts and executive compensatory plans or arrangements in which certain of the directors and executive officers of the Registrant participate.
10.1		2014 Omnibus Equity Compensation Plan Restricted Stock Unit Agreement. (Incorporated by reference to exhibit 10.1 to the Registrant's Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2022.)
10.2		2014 Omnibus Equity Compensation Plan Stock Option Grant Agreement. (Incorporated by reference to exhibit 10.2 to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2022.)
10.4		1998 Equity Compensation Plan, Amended and Restated as of April 8, 2003. (Incorporated by reference to exhibit 99.1 to the Registrant’s Registration Statement on Form S-8 (No. 333-111224) filed December 16, 2003.)
10.4.1		Amendment 2006-1 to the 1998 Equity Compensation Plan, Amended and Restated as of April 8, 2003. (Incorporated by reference to exhibit 10.4.1 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2006.)
10.5	*	Employee Stock Purchase Plan as Amended and Restated on April 21, 2020.
10.6		SEI Capital Accumulation Plan. (Incorporated by reference to exhibit 99(e) to the Registrant’s Registration Statement on Form S-8 (No. 333-41343) filed December 2, 1997.)
10.10		2007 Equity Compensation Plan. (Incorporated by reference to exhibit 10.10 to the Registrant’s Current Report on Form 8-K dated April 11, 2007.)
10.11		2014 Omnibus Equity Compensation Plan. (Incorporated by reference to exhibit 10.11 to the Registrant’s Current Report on Form 8-K dated May 21, 2014.)
10.12		Employment Agreement, dated May 2, 2018, between Michael N. Peterson and the Registrant. (Incorporated by reference to exhibit 10.12 to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2018.)
10.13		Employment Agreement, dated March 31, 2022, between Ryan Hicke and the Registrant. (Incorporated by reference to exhibit 99.1 to the Registrant's Current Report on Form 8-K dated March 31, 2022.)
10.14		Employment Agreement, dated January 16, 2024, between Sean Denham and the Registrant. (Incorporated by reference to exhibit 99.1 to the Registrant's Current Report on Form 8-K dated January 16, 2024.)

10.14.1		Amendment No. 1 to Employment Agreement, dated January 31, 2024, between Sean Denham and the Registrant. (Incorporated by reference to exhibit 99.2 to the Registrant's Current Report on Form 8-K dated January 16, 2024.)
10.22		Credit Facility, dated January 14, 2003 between Royal Bank of Canada and SEI Investments Canada Company, a subsidiary of SEI Investments Company. (Incorporated by reference to exhibit 10.22 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2005.)
10.22.1		First Amendment, dated June 15, 2005 to Credit Facility, dated January 14, 2003 between Royal Bank of Canada and SEI Investments Canada Company, a subsidiary of SEI Investments Company. (Incorporated by reference to exhibit 10.22.1 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2005.)
10.22.2		Second Amendment, dated February 20, 2006 to Credit Facility, dated January 14, 2003 between Royal Bank of Canada and SEI Investments Canada Company, a subsidiary of SEI Investments Company. (Incorporated by reference to exhibit 10.22.2 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2005.)
10.27		Credit Agreement, dated as of April 23, 2021 among SEI Investments Company, the Lenders, U.S. Bank National Association, as Syndication Agent, Bank of America, N.A., Citizens Bank, N.A., Manufacturers and Traders Trust Company and Regions Bank, as Documentation Agents, and Wells Fargo Bank, National Association, as Administrative Agent (Incorporated by reference to exhibit 10.27 to the Registrant’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2021.)
10.27.1		First Amendment to Credit Agreement dated as of April 17, 2023 among SEI Investments Company, the Lenders, U.S. Bank National Association, as Syndication Agent, Bank of America, N.A., Citizens Bank, N.A., Manufacturers and Traders Trust Company and Regions Bank, as Documentation Agents, and Wells Fargo Bank, National Association, as Administrative Agent (Incorporated by reference to exhibit 10.27.1 to the Registrant's Current Report on Form 8-K dated April 17, 2023.)
14		Code of Ethics for Senior Financial Officers. (Incorporated by reference to exhibit 14 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2003.)
21	*	Subsidiaries of the Registrant.
23.1	*	Consent of KPMG LLP.
23.2	*	Consent of KPMG LLP relating to the financial statements of LSV Asset Management.
31.1		Rule 13a-15(e)/15d-15(e) Certification of Principal Executive Officer.
31.2		Rule 13a-15(e)/15d-15(e) Certification of Principal Financial Officer.
97	*	Amended and Restated Compensation Recoupment Policy
99.11		Financial Statements of LSV Asset Management dated December 31, 2020 and 2019. (Incorporated by reference to exhibit 99.11 to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2020.)
99.12		Financial Statements of LSV Asset Management dated December 31, 2021 and 2020. (Incorporated by reference to exhibit 99.12 to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2021.)
99.13		Financial Statements of LSV Asset Management dated December 31, 2022 and 2021. (Incorporated by reference to exhibit 99.13 to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2022.)
99.14		Financial Statements of LSV Asset Management dated December 31, 2023 and 2022.
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.LAB	*	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	*	XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF	*	XBRL Taxonomy Extension Definition Linkbase Document

(P)	Paper Exhibit
*	Previously filed with our 2023 Form 10-K, originally filed with the Commission on February 20, 2024, which is being amended hereby

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this Amendment No. 1 to Form 10-K to be signed on its behalf by the undersigned, thereunto duly authorized.

		SEI INVESTMENTS COMPANY
Date:	February 22, 2024	By:	/s/ Dennis J. McGonigle
			Dennis J. McGonigle
			Chief Financial Officer