SEC Filing

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SEC FORM 4 SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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

1. Name and Address of Reporting Person^*

Ross Howard D

(Last)

(First)

(Middle)

1811 CHESTNUT STREET

SUITE 210

(Street)

PHILADELPHIA

19103

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
SEI INVESTMENTS CO [ SEIC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
12/15/2005

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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 Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)

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 Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Option (Right to Buy)	$38.54	12/14/2005		A		4,000		12/14/2012⁽¹⁾	12/14/2015	Common Stock	4,000	$0	4,000	D

Explanation of Responses:

1. The option vests upon the earlier of the Issuer's attainment of specific levels of earnings per share or seven years from the date of the grant. The option will expire on the ten year anniversary of the date of the grant.

Remarks:

	Ruth A. Montgomery (Attorney in fact)	12/15/2005
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

POWER OF ATTORNEY







KNOW ALL BY THESE PRESENTS, THAT THE UNDERSIGNED HEREBY CONSTITUTES AND APPOINTS





EACH OF Ruth Montgomery, SOFIA ROSALA AND N. JEFFREY KLAUDER SIGNING SINGLY,





THE UNDERSIGNED'S TRUE AND LAWFUL ATTORNEY-IN-FACT TO:







(1) execute for and on behalf of the undersigned, in the undersigned's capacity



as an officer and/or director of SEI Investment Company (the "Company"),



Forms 3, 4, and 5 in accordance with Section 16(a) of the Securities



Exchange Act of 1934 and the rules thereunder;





(2) do and perform any and all acts for and on behalf of the undersigned which



may be necessary or desirable to complete and execute any such Form 3, 4 or



5 and and timely file such form with the United States Securities and



Exchange Commission and any stock exchange or other similar authority; and







(3) take any other action of any type whatsoever in connection with the



foregoing which, in the opinion of such attorney-in-fact, may be of benefit to,



in the best interest of, or legally required by, the undersigned, it being



understood that the documents executed by such attorney-in-fact on



behalf of the undersigned pursuant to this Power of Attorney shall be in such



form and shall contain such terms and conditions as such attorney-in-fact may



approve in such attorney-in-fact's discretion.







The undersigned hereby grants to each such attorney-in-fact full power and



authority to do and perform any and every act and thing whatsoever requisite,



necessary, or proper to be done in the exercise of any of the rights and powers



herein granted, as fully to all intents and purposes as the undersigned



might or could do if personally present, with full power of substitution or



revocation, hereby ratifying and confirming all that such attorney-in-fact, or



such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to



be done by virtue of this power of attorney and the rights and powers herein



granted.  The undersigned acknowledges that the foregoing attorneys-in-fact,



in serving in such capacity at the request of the undersigned, are not assuming,



nor is the Company assuming, any of the undersigned's responsibilities to comply



with Section 16 of the Securities Exchange Act of 1934.







This Power of Attorney shall remain in full force and effect until the



undersigned is no longer required to file Forms 3, 4, and 5 with respect to the



undersigned's holdings of and transactions in securities issued by the Company,



unless earlier revoked by the undersigned in a signed writing delivered to the



foregoing attorneys-in-fact.







IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be



executed as of this 15th day of June 2005.



                                                       /S/ Howard D. Ross

                                                       Signature



             Howard D. Ross

                                                       Print Name