FORM 5 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Form 3 Holdings Reported Form 4 Transactions Reported

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ANNUAL STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * GUARINO CARL 2. Issuer Name and Ticker or Trading Symbol SEI INVESTMENTS CO [SEIC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Executive Vice President (Last) (First) (Middle) ONE FREEDOM VALLEY DRIVE 3. Statement for Issuer's Fiscal Year Ended (Month/Day/Year) 12/31/2004 (Street) OAKS, PA 19456 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Reporting (check applicable line) _X_ Form Filed by One Reporting Person ___ Form Filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned at end of Issuer's Fiscal Year (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Amount (A) or (D) Price Common Stock 12/06/2004   G 37,765 D $ 0 (1) 289,263.6655 D   Common Stock 12/06/2004   G 50,328 D $ 0 (1) 238,935.6655 (2) D   Common Stock             800 I For the benefit of Minor Children (3) Common Stock 12/06/2004   G 50,328 A $ 0 50,328 I By the Carl and Alice Guarino 2004 Irrevocable Trust for Descendants (4) Common Stock             173,963 I By the Carl A. Guarino 2004 Grantor Retained Annuity Trust

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

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SEC 2270 (9-02)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned at End of Issuer's Fiscal Year (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
GUARINO CARL ONE FREEDOM VALLEY DRIVE OAKS, PA 19456	Â	Â	  Executive Vice President	Â

Signatures

Jill B. Geisenheimer (Attorney-in-fact)		02/14/2005
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Not applicable - Gift Transfer
(2)	Mr. Guarino's direct holdings reflect a transfer of 50,328 shares to the Carl and Alice Guarino 2004 Irrevocable Trust for Descendants, listed below. Mr. Guarino's direct holdings also includes 2.5855 shares acquired through the reinvestment of dividends in the SEI Stock Purchase Plan in 2004.
(3)	The reporting person disclaims ownership of all securities held in custodianship for the benefit of his minor children and the report should not be deemed as an admission that the reporting person is the beneficial owner of such securities for Section 16 or for any other purpose.
(4)	The Carl and Alice Guarino 2004 Irrevocable Trust for Descendants was established in December 2004 for the benefit of Mr. Guarino's children and Mr. Guarino's sister-in-law is the trustee. The holdings reflect the transfer of 50,328 shares from Mr. Guarino's direct holdings to the Carl and Alice Guarino 2004 Irrevocable Trust for Descendants.

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