Withrow Wayne Form 4/A SEI INVESTMENTS / WAYNE WITHROW ownership change

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^*

WITHROW WAYNE

(Last) (First) (Middle)

(Street)

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
08/05/2015

4. If Amendment, Date of Original Filed (Month/Day/Year)
08/07/2015

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)
			Code	V	Amount	(A) or (D)	Price
STOCK OPTION (RIGHT TO PURCHASE)	08/05/2015		M		5,400	A	$19.28	38,979	D
COMMON STOCK	08/05/2015		S		5,400	D	$54.76	33,579	D
STOCK OPTION (RIGHT TO PURCHASE)	08/10/2015		M		4,600	A	$19.28	38,179	D
COMMON STOCK	08/10/2015		S		4,600	D	$55.23	33,579	D

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
STOCK OPTION (RIGHT TO PURCHASE)	$19.28(1)	08/05/2015		M		5,400		12/31/2007	12/14/2015	COMMON STOCK	5,400	$19.28	4,600	D
STOCK OPTION (RIGHT TO PURCHASE)	$19.28	08/10/2015		M		4,600		12/31/2007	12/14/2015	STOCK OPTION (RIGHT TO PURCHASE)	4,600	$19.28	0	D

Explanation of Responses:

1. THIS TRANSACTION WAS ORIGINALLY FILED AS A STRAIGHT SALE OF 5,4000 SHARES. MR. WITHROW EXERCISED 5,400 SHARES OUT OF HIS 12/14/2005 GRANT AND THEN SOLD THE SHARES.

	RUTH MONTGOMERY (ATTORNEY IN FACT)	08/12/2015
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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