MarketPeel
Insider Trading Intelligence
AW

Alfred P. JR West

SEIC
EXECUTIVE CHAIRMAN · SEI INVESTMENTS CO · CIK 0001059374
FILING MIX · LIFETIME16%/84%
BUYS
19
SELLS
99
TOTAL VALUE
$231.53M
COMPANIES
1
ACTIVE SINCE
Mar 2019
HOLDINGS NOW
6,818,451
AVG SELL PX
$65.50
TRADE KIND
SHOWING 118 / 118
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
83 backtested trades · 8 horizons · 43 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Alfred P. JR West, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d83+56.63%-0.84%-0.65%-0.19%-0.07%-0.79
14d83+68.67%-1.84%-1.66%-0.18%+0.29%-0.69
30d83+54.22%-1.17%-0.97%-0.20%+0.41%-0.39
60d83+39.76%+1.70%+2.11%-0.41%+1.75%-0.59
90d83+48.75%+1.54%+2.37%-0.58%+0.84%-0.72
180d83(5 pending)+35.90%+5.77%+8.68%-2.94%-1.01%-2.82
1y83(6 pending)+19.48%+10.69%+18.87%-7.96%-12.31%-5.42
2y83(32 pending)+5.88%+28.93%+40.51%-11.58%-10.69%-6.69
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
SEIC · 6,818,451 shares · as of Jun 29, 2026
02,450,2884,900,5777,350,8659,801,1532020202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2019
2019
2019
2019
2020
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 19 buys / 99 sellsCOVERAGE · 30 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
SEIC
SEI INVESTMENTS CO
SALE
1,680$88.09$148.0K6,818,451Jun 29, 2026Jun 29, 2026View →
SEIC
SEI INVESTMENTS CO
SALE
5,652$87.18$492.7K6,820,131Jun 29, 2026Jun 29, 2026View →
SEIC
SEI INVESTMENTS CO
SALE
3,838$87.67$336.5K6,825,783Jun 26, 2026Jun 29, 2026View →
SEIC
SEI INVESTMENTS CO
SALE
46,162$87.21$4.03M6,829,621Jun 26, 2026Jun 29, 2026View →
SEIC
SEI INVESTMENTS CO
SALE
1,371$79.94$109.6K6,875,783Mar 11, 2026Mar 12, 2026View →
SEIC
SEI INVESTMENTS CO
SALE
6,076$79.11$480.7K6,877,154Mar 11, 2026Mar 12, 2026View →
SEIC
SEI INVESTMENTS CO
SALE
25,391$79.97$2.03M6,912,661Mar 10, 2026Mar 12, 2026View →
SEIC
SEI INVESTMENTS CO
SALE
29,431$80.47$2.37M6,883,230Mar 10, 2026Mar 12, 2026View →
SEIC
SEI INVESTMENTS CO
SALE
178$78.88$14.0K6,938,052Mar 10, 2026Mar 12, 2026View →
SEIC
SEI INVESTMENTS CO
SALE
3,482$82.02$285.6K6,938,230Jan 1, 2026Jan 2, 2026View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
1,100$81.25$89.4K6,941,712Dec 5, 2025Dec 29, 2025View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
30,0000Dec 3, 2025Dec 5, 2025View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
24,770$80.87$2.00M6,942,812Dec 3, 2025Dec 5, 2025View →
SEIC
SEI INVESTMENTS CO
PURCHASE
Executive Chairman
30,000$53.34$1.60M6,967,582Dec 3, 2025Dec 5, 2025View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
64,498$84.26$5.43M6,939,210May 29, 2025May 30, 2025View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
1,628$85.21$138.7K6,937,582May 29, 2025May 30, 2025View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
75,000$85.78$6.43M7,003,708May 28, 2025May 30, 2025View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
1,372$76.28$104.7K7,078,708Mar 5, 2025Mar 5, 2025View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
18,427$75.77$1.40M7,141,653Mar 4, 2025Mar 5, 2025View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
13,855$77.20$1.07M7,080,080Mar 4, 2025Mar 5, 2025View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
47,718$76.49$3.65M7,093,935Mar 4, 2025Mar 5, 2025View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
19,405$79.55$1.54M7,181,696Mar 3, 2025Mar 5, 2025View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
21,616$80.30$1.74M7,160,080Mar 3, 2025Mar 5, 2025View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
31,821$78.82$2.51M7,201,101Mar 3, 2025Mar 5, 2025View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
3,738$86.09$321.8K7,232,922Dec 16, 2024Dec 17, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
34,672$85.34$2.96M7,236,660Dec 16, 2024Dec 17, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
13,632$84.72$1.15M7,271,332Dec 16, 2024Dec 17, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
500$87.25$43.6K7,284,964Dec 13, 2024Dec 17, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
12,703$86.22$1.10M7,285,464Dec 13, 2024Dec 17, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
80,955$85.64$6.93M7,298,167Dec 13, 2024Dec 17, 2024View →
SEIC
SEI INVESTMENTS CO
PURCHASEGRANT
Stock grant
7,6007,379,122Dec 12, 2024Dec 16, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
5,984$84.23$504.0K7,371,522Dec 6, 2024Dec 6, 2024View →
SEIC
SEI INVESTMENTS CO
PURCHASE
Executive Chairman
35,000$40.64$1.42M7,396,516Dec 4, 2024Dec 6, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
35,0000Dec 4, 2024Dec 6, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
19,010$82.49$1.57M7,377,506Dec 4, 2024Dec 6, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
7,099$80.81$573.7K7,361,516Nov 11, 2024Nov 12, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
100,000$80.26$8.03M7,368,615Nov 8, 2024Nov 12, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
30,000$80.24$2.41M7,468,615Nov 7, 2024Nov 12, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
5,670$67.50$382.7K7,498,615Aug 29, 2024Aug 30, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
61,000$67.36$4.11M7,504,285Aug 28, 2024Aug 28, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
40,129$66.90$2.68M7,565,285Aug 27, 2024Aug 28, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
44,163$67.55$2.98M7,605,414Aug 26, 2024Aug 27, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
27,419$67.48$1.85M7,649,577Aug 23, 2024Aug 27, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
475$67.91$32.3K7,676,996May 14, 2024May 14, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
48,000$68.09$3.27M7,677,471May 13, 2024May 14, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
70,000$68.60$4.80M7,725,471May 10, 2024May 13, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
70,000$68.62$4.80M7,795,471May 9, 2024May 13, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
19,363$72.14$1.40M7,865,471Mar 28, 2024Apr 1, 2024View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
150,000$70.75$10.61M7,884,834Mar 26, 2024Mar 28, 2024View →
SEIC
SEI INVESTMENTS CO
PURCHASEGRANT
Stock grant
4,0008,034,834Dec 15, 2023Dec 19, 2023View →
SEIC
SEI INVESTMENTS CO
PURCHASEGRANT
Stock grant
12,50012,500Dec 15, 2023Dec 19, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
4,500$59.96$269.8K8,031,034Dec 4, 2023Dec 4, 2023View →
SEIC
SEI INVESTMENTS CO
PURCHASE
Executive Chairman
6,219$33.76$210.0K8,035,534Dec 4, 2023Dec 4, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
6,2190Dec 4, 2023Dec 4, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
200$60.17$12.0K8,030,834Dec 4, 2023Dec 4, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
16,2816,219Dec 1, 2023Dec 4, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
22,5000Dec 1, 2023Dec 4, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
29,343$59.78$1.75M8,029,315Dec 1, 2023Dec 4, 2023View →
SEIC
SEI INVESTMENTS CO
PURCHASE
Executive Chairman
16,281$33.76$549.6K8,058,658Dec 1, 2023Dec 4, 2023View →
SEIC
SEI INVESTMENTS CO
PURCHASE
Executive Chairman
22,500$33.76$759.6K8,042,377Dec 1, 2023Dec 4, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
18,559$57.91$1.07M8,019,877Nov 22, 2023Nov 22, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
90,478$57.85$5.23M8,038,436Nov 21, 2023Nov 21, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
49,946$58.24$2.91M8,128,914Nov 20, 2023Nov 21, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
48,159$58.00$2.79M8,178,860Nov 17, 2023Nov 21, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
43,192$60.14$2.60M8,227,019Sep 13, 2023Sep 13, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
900$61.02$54.9K8,270,211Sep 12, 2023Sep 13, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
69,540$60.49$4.21M8,271,111Sep 12, 2023Sep 13, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
18,808$61.02$1.15M8,340,651Sep 11, 2023Sep 13, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
60,270$56.96$3.43M8,359,459Jun 23, 2023Jun 26, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
41,304$57.68$2.38M8,419,729Jun 22, 2023Jun 22, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
58,687$58.68$3.44M8,461,033Jun 21, 2023Jun 22, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
46,647$58.99$2.75M8,519,720Jun 20, 2023Jun 22, 2023View →
SEIC
SEI INVESTMENTS CO
SALEGRANT
Gift
1,7618,566,367Apr 4, 2023Apr 11, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
15,659$56.06$877.8K8,568,128Mar 29, 2023Mar 29, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
17$63.59$1.1K8,783,649Feb 9, 2023Feb 9, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
29,551$62.99$1.86M8,783,666Feb 9, 2023Feb 9, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
26,526$63.66$1.69M8,813,217Feb 8, 2023Feb 8, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
11,040$63.42$700.2K8,839,743Feb 8, 2023Feb 8, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
32,325$63.25$2.04M8,873,288Feb 7, 2023Feb 8, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
22,505$63.74$1.43M8,850,783Feb 7, 2023Feb 8, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
35,936$63.39$2.28M8,905,613Feb 6, 2023Feb 8, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
200$56.72$11.3K8,948,224Dec 19, 2022Dec 20, 2022View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
6,675$58.23$388.7K8,941,549Dec 19, 2022Dec 20, 2022View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
100,000$58.03$5.80M8,948,424Dec 16, 2022Dec 20, 2022View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
27,800$59.27$1.65M9,048,624Dec 15, 2022Dec 16, 2022View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
200$60.06$12.0K9,048,424Dec 15, 2022Dec 16, 2022View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
35,368$60.68$2.15M9,076,424Dec 14, 2022Dec 16, 2022View →
SEIC
SEI INVESTMENTS CO
PURCHASEGRANT
Stock grant
15,00015,000Dec 5, 2022Feb 28, 2023View →
SEIC
SEI INVESTMENTS CO
PURCHASEGRANT
Stock grant
2,5008,784,166Dec 5, 2022Feb 28, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
50,0000Nov 16, 2022Nov 17, 2022View →
SEIC
SEI INVESTMENTS CO
PURCHASE
Executive Chairman
50,000$22.45$1.12M9,111,792Nov 16, 2022Nov 17, 2022View →
SEIC
SEI INVESTMENTS CO
SALE
75,000$53.68$4.03M9,061,792Sep 16, 2022Sep 16, 2022View →
SEIC
SEI INVESTMENTS CO
SALE
83,386$55.07$4.59M9,136,792Sep 15, 2022Sep 16, 2022View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
65,900$55.45$3.65M8,583,787Mar 27, 2022Mar 27, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
100,000$55.59$5.56M8,649,687Mar 24, 2022Mar 27, 2023View →
SEIC
SEI INVESTMENTS CO
SALE
Executive Chairman
36,462$55.40$2.02M8,749,687Mar 23, 2022Mar 27, 2023View →
SEIC
SEI INVESTMENTS CO
PURCHASE
10,000$60.46$604.6K10,000Dec 10, 2021Dec 14, 2021View →
SEIC
SEI INVESTMENTS CO
PURCHASE
25,000$60.46$1.51M25,000Dec 10, 2021Dec 14, 2021View →
SEIC
SEI INVESTMENTS CO
SALE
100,000$61.00$6.10M9,220,178Dec 9, 2021Dec 10, 2021View →
SEIC
SEI INVESTMENTS CO
SALE
32,345$61.65$1.99M9,320,178Dec 8, 2021Dec 10, 2021View →
SEIC
SEI INVESTMENTS CO
PURCHASE
50,000$15.77$788.5K9,352,523Dec 6, 2021Dec 8, 2021View →
SEIC
SEI INVESTMENTS CO
PURCHASE
50,000$15.77$788.5K0Dec 6, 2021Dec 8, 2021View →
SEIC
SEI INVESTMENTS CO
SALE
54,043$58.20$3.15M9,302,523Feb 17, 2021Feb 17, 2021View →
SEIC
SEI INVESTMENTS CO
SALE
45,951$57.51$2.64M9,356,566Feb 12, 2021Feb 17, 2021View →
SEIC
SEI INVESTMENTS CO
PURCHASE
50,000$23.86$1.19M9,402,517Dec 9, 2020Dec 10, 2020View →
SEIC
SEI INVESTMENTS CO
PURCHASE
50,000$23.86$1.19M0Dec 9, 2020Dec 10, 2020View →
SEIC
SEI INVESTMENTS CO
PURCHASE
75,000$56.64$4.25M75,000Dec 8, 2020Dec 10, 2020View →
SEIC
SEI INVESTMENTS CO
PURCHASE
75,000$56.54$4.24M75,000Dec 8, 2020Dec 10, 2020View →
SEIC
SEI INVESTMENTS CO
SALE
10,069$53.81$541.8K9,352,517Dec 1, 2020Dec 2, 2020View →
SEIC
SEI INVESTMENTS CO
SALE
119,391$53.40$6.38M9,362,586Nov 30, 2020Dec 2, 2020View →
SEIC
SEI INVESTMENTS CO
SALE
65,000$50.19$3.26M9,481,977Sep 18, 2020Sep 22, 2020View →
SEIC
SEI INVESTMENTS CO
SALE
35,000$50.06$1.75M9,546,977Sep 17, 2020Sep 18, 2020View →
SEIC
SEI INVESTMENTS CO
SALE
122,411$60.89$7.45M9,581,977Feb 27, 2020Feb 27, 2020View →
SEIC
SEI INVESTMENTS CO
SALE
56,002$63.19$3.54M9,704,388Feb 26, 2020Feb 27, 2020View →
SEIC
SEI INVESTMENTS CO
SALE
11,587$66.43$769.7K9,760,390Feb 24, 2020Feb 25, 2020View →
SEIC
SEI INVESTMENTS CO
SALEGRANT
Gift
28,6519,771,977Dec 30, 2019Feb 19, 2020View →
SEIC
SEI INVESTMENTS CO
SALEGRANT
Gift
5259,800,628Aug 15, 2019Feb 19, 2020View →
SEIC
SEI INVESTMENTS CO
SALEGRANT
Gift
5609,801,153Mar 14, 2019Feb 19, 2020View →
Other insiders · SEIC
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About this filer
CIK 0001059374
ROLE
Executive Chairman
PRIMARY
SEIC
COMPANIES
1
ACTIVE SINCE
Mar 2019
MARKETPEEL · /INSIDER/0001059374DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

One short email. Insider buys, congressional trades, and plain-English analysis.

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