Alfred P. West Jr. - 10 Mar 2026 Form 4 Insider Report for SEI INVESTMENTS CO (SEIC)

Role
Chairman Emeritus
Signature
/s/ Alfred P. West, Jr., by Diane Gallagher, attorney in fact
Issuer symbol
SEIC
Transactions as of
10 Mar 2026
Net transactions value
-$5,003,142
Form type
4
Filing time
12 Mar 2026, 10:13:32 UTC
Previous filing
02 Jan 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
WEST ALFRED P JR Chairman Emeritus 1 FREEDOM VALLEY DRIVE, OAKS /s/ Alfred P. West, Jr., by Diane Gallagher, attorney in fact 12 Mar 2026 0001059374

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SEIC Common Stock Sale $14,041 -178 -0% $78.88 6,938,052 10 Mar 2026 Direct F1
transaction SEIC Common Stock Sale $2,030,518 -25,391 -0.37% $79.97 6,912,661 10 Mar 2026 Direct F2
transaction SEIC Common Stock Sale $2,368,313 -29,431 -0.43% $80.47 6,883,230 10 Mar 2026 Direct F3
transaction SEIC Common Stock Sale $480,672 -6,076 -0.09% $79.11 6,877,154 11 Mar 2026 Direct F4
transaction SEIC Common Stock Sale $109,598 -1,371 -0.02% $79.94 6,875,783 11 Mar 2026 Direct F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 All shares sold for the same price.
F2 Represents the weighted average of a range of sale prices from $79.12 to $80.11. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price.
F3 Represents the weighted average of a range of sale prices from $80.12 to $81.04. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price.
F4 Represents the weighted average of a range of sale prices from $78.66 to $79.64. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price.
F5 Represents the weighted average of a range of sale prices from $79.67 to $80.60. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price.