Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF 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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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Barr Kevin
 2. Date of Event Requiring Statement (Month/Day/Year)
06/05/2008		 3. Issuer Name and Ticker or Trading Symbol
SEI INVESTMENTS CO [SEIC]
(Last)
(First)
(Middle)
ONE FREEDOM VALLEY DRIVE		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Executive Vice President
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

OAKS, PA 19456		 6. Individual or Joint/Group Filing(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 Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 54,847.87
I
Shares purcahsed through and held in an ESPP account

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (Right to Buy)   (1) 04/06/2010 Common Stock 60,000 $ 9.14 D  
Stock Option (Right to Buy)   (1) 12/14/2010 Common Stock 8,000 $ 25 D  
Stock Option (Right to Buy)   (1) 12/13/2011 Common Stock 30,000 $ 21.43 D  
Stock Option (Right to Buy)   (1) 12/10/2012 Common Stock 50,000 $ 14.71 D  
Stock Option (Right to Buy)   (1) 12/16/2013 Common Stock 40,000 $ 14.78 D  
Stock Option (Right to Buy)   (1) 12/14/2014 Common Stock 50,000 $ 21.55 D  
Stock Option (Right to Buy)   (1) 12/14/2015 Common Stock 40,000 $ 19.28 D  
Stock Option (Right to Biy)   (1) 12/13/2016 Common Stock 13,500 $ 29.61 D  
Stock Option (Right to Buy)   (1) 12/10/2017 Common Stock 8,750 $ 32.49 D  

Reporting Owners

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

Signatures

Ruth Montgomery (attorney in fact) 06/03/2008
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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) 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.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

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