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CIK 0000350894 · Large accelerated filer

SEI INVESTMENTS CO

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Ticker
SEIC
Exchange
Nasdaq
Industry
Security Brokers, Dealers & Flotation Companies
FY end
Dec 31
Incorporated
PA
Entity type
operating
EIN
231707341
Phone
6106761000
Business address
1 FREEDOM VALLEY DRIVE, OAKS, PA, 19456-1100
Former names
SEI CORP
Open-market buys, last 90 days
$0
in 0 filings
Open-market sales, last 90 days
$13,512,522
in 6 filings

Net −$13,512,522. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. Peterson Michael −$4.2M Executive Vice President sold 65% of stake
  2. Hicke Ryan −$4.2M Chief Executive Officer sold 16% of stake
  3. WEST ALFRED P JR −$3.5M Chairman Emeritus sold <1% of stake
  4. DORAN WILLIAM −$882K Director sold 1% of stake
  5. ROMEO CARMEN −$549K Director sold <1% of stake

Reading 100 more Form 4s from the SEC; this list fills in as they're read.

Date Insider Transaction Shares Price Value Owned after
2026-08-28 Peterson Michael Executive Vice President Sale −37,500 $111.51 $4.2M 20,148
2026-08-28 Peterson Michael Executive Vice President Option exercise · Option to Purchase Common Stock −37,500 0
2026-08-05 McCabe Philip See Remarks Option exercise +5,043 $49.63 $250K 59,927.45
2026-08-05 McCabe Philip See Remarks Sale −5,043 $105.50 $532K 54,884.45
2026-08-05 McCabe Philip See Remarks Option exercise · Option to Purchase Common Stock −5,043 0
2026-08-04 McCabe Philip See Remarks Option exercise +9,957 $49.63 $494K 64,841.45
2026-08-04 McCabe Philip See Remarks Option exercise +15,000 $49.63 $744K 79,841.45
2026-08-04 McCabe Philip See Remarks Sale −24,957 $105.04 $2.6M 54,884.45
2026-08-04 McCabe Philip See Remarks Option exercise · Option to Purchase Common Stock −9,957 5,043
2026-08-04 McCabe Philip See Remarks Option exercise · Option to Purchase Common Stock −15,000 0
2026-08-03 MCCARTHY KATHRYN Director Option exercise +5,000 $71.12 $356K 82,883
2026-08-03 MCCARTHY KATHRYN Director Option exercise +5,000 $71.12 $356K 87,883
2026-08-03 MCCARTHY KATHRYN Director Sale −10,000 $103.54 $1.0M 77,883
2026-08-03 MCCARTHY KATHRYN Director Option exercise · Option to Purchase Common Stock −5,000 0
2026-08-03 MCCARTHY KATHRYN Director Option exercise · Option to Purchase Common Stock −5,000 0
2026-07-28 Warner Mark Andrew See Remarks* Option exercise +2,500 $64.43 $161K 3,421
2026-07-28 Warner Mark Andrew See Remarks* Option exercise +2,500 $64.43 $161K 5,921
2026-07-28 Warner Mark Andrew See Remarks* Option exercise +5,000 $56.54 $283K 10,921
2026-07-28 Warner Mark Andrew See Remarks* Option exercise +5,000 $56.54 $283K 15,921
2026-07-28 Warner Mark Andrew See Remarks* Sale −2,300 $101.11 $233K 13,621

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