Vanguard Group Inc ownership in SEIC / SEI Investments Company

SEI投資公司

US ˙ NasdaqGS ˙ US7841171033

Security	SEIC / SEI Investments Company
Institution	Vanguard Group Inc
Latest Disclosed Ownership	11,888,519 shares
Ownership	9.03%

2024-02-13 - Vanguard Group Inc has filed an SC 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 11,888,519 shares of SEI Investments Company (US:SEIC). This represents 9.03 percent ownership of the company. In their previous filing dated 2023-02-09 , Vanguard Group Inc had reported owning 12,247,827 shares, indicating a decrease of -2.93 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File Date	Effective Date	Form	Prev Shares	Latest Shares	ΔShares (Percent)	Ownership (Percent)	ΔOwnership (Percent)
2024-02-13	2024-02-13	13G/A	12,247,827	11,888,519	-2.93	9.03	-0.55
2023-02-09	2023-02-09	13G/A	12,065,855	12,247,827	1.51	9.08	4.97
2022-02-10	2022-02-10	13G/A	12,683,416	12,065,855	-4.87	8.65	-1.37
2021-02-10	2021-02-10	13G/A	13,976,020	12,683,416	-9.25	8.77	-5.70
2020-02-12	2020-02-12	13G/A	13,708,964	13,976,020	1.95	9.30	5.56
2019-02-13	2019-02-13	13G/A	13,596,724	13,708,964	0.83	8.81	2.09
2018-02-12	2018-02-12	13G/A	12,307,722	13,596,724	10.47	8.63	12.22
2017-02-13	2017-02-13	13G/A	11,222,092	12,307,722	9.67	7.69	12.92
2016-02-10	2016-02-10	13G/A		11,222,092		6.81
2015-02-11	2015-02-11	13G/A		10,142,370		6.06
2014-02-11	2014-02-11	13G		9,606,107		5.63

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)

File Date	Effective Date	Form	Security	Class	ID	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-01-29	2025-12-31	13F	SEI INVTS	COM	784117103	11,071,365	-189,226	-1.68	908,073	-4.96	0.0132
2025-11-07	2025-09-30	13F	SEI INVTS	COM	784117103	11,260,591	30,970	0.28	955,461	-5.31	0.0143
2025-08-11	2025-06-30	13F	SEI INVTS	COM	784117103	11,229,621	-231,566	-2.02	1,009,094	13.42	0.0163
2025-05-09	2025-03-31	13F	SEI INVTS	COM	784117103	11,461,187	-139,086	-1.20	889,732	-7.01	0.0161
2025-02-11	2024-12-31	13F	SEI INVTS	COM	784117103	11,600,273	9,489	0.08	956,791	19.31	0.0167
2024-11-13	2024-09-30	13F	SEI INVTS	COM	784117103	11,590,784	-247,319	-2.09	801,966	4.72	0.0144
2024-08-13	2024-06-30	13F	SEI INVTS	COM	784117103	11,838,103	-5,492	-0.05	765,807	-10.07	0.0147
2024-05-10	2024-03-31	13F	SEI INVTS	COM	784117103	11,843,595	-44,924	-0.38	851,554	12.71	0.0169
2024-03-11	2023-12-31	13F/A-1	SEI INVTS	COM	784117103	11,888,519	-94,942	-0.79	755,515	4.68	0.0165
2024-02-14	2023-12-31	13F	SEI INVTS	COM	784117103	11,888,519	-94,942		755,515		0.0143
2023-12-18	2023-09-30	13F/A-1	SEI INVTS	COM	784117103	11,983,461	-116,777	-0.97	721,764	0.05	0.0177
2023-11-14	2023-09-30	13F	SEI INVTS	COM	784117103	11,983,461	-116,777		721,764		0.0032
2023-08-14	2023-06-30	13F	SEI INVTS	COM	784117103	12,100,238	-182,664	-1.49	721,416	2.06	0.0171
2023-07-14	2023-03-31	13F/A-1	SEI INVTS	COM	784117103	12,282,902	35,075	0.29	706,881	-1.00	0.0180
2023-05-15	2023-03-31	13F	SEI INVTS	COM	784117103	12,282,842	35,015		706,878		0.0038
2023-02-10	2022-12-31	13F	SEI INVTS	COM	784117103	12,247,827	165,574	1.37	714,048	20.49	0.0194
2022-11-14	2022-09-30	13F	SEI INVTS	COM	784117103	12,082,253	-89,220	-0.73	592,635	-9.87	0.0174
2022-08-12	2022-06-30	13F	SEI INVTS	COM	784117103	12,171,473	162,231	1.35	657,502	-9.07	0.0185
2022-05-13	2022-03-31	13F	SEI INVTS	COM	784117103	12,009,242	-56,613	-0.47	723,077	-1.66	0.0171
2022-02-14	2021-12-31	13F	SEI INVTS	COM	784117103	12,065,855	107,711	0.90	735,293	3.69	0.0167
2021-11-12	2021-09-30	13F	SEI INVTS	COM	784117103	11,958,144	-540,239	-4.32	709,117	-8.44	0.0176
2021-08-13	2021-06-30	13F	SEI INVTS	COM	784117103	12,498,383	16,466	0.13	774,525	1.84	0.0193
2021-05-14	2021-03-31	13F	SEI INVTS	COM	784117103	12,481,917	-201,499	-1.59	760,523	4.34	0.0206
2021-02-12	2020-12-31	13F	SEI INVTS	COM	784117103	12,683,416	-9,732	-0.08	728,917	13.22	0.0211
2020-11-16	2020-09-30	13F	SEI INVTS	COM	784117103	12,693,148	-705,691	-5.27	643,796	-12.61	0.0213
2020-08-14	2020-06-30	13F	SEI INVTS	COM	784117103	13,398,839	-899,949	-6.29	736,669	11.18	0.0261
2020-05-15	2020-03-31	13F	SEI INVESTMENTS	COM	784117103	14,298,788	322,768	2.31	662,604	-27.60	0.0282
2020-02-14	2019-12-31	13F	SEI INVESTMENTS	COM	784117103	13,976,020	438,826	3.24	915,149	14.09	0.0312
2019-11-14	2019-09-30	13F	SEI INVESTMENTS	COM	784117103	13,537,194	145,952	1.09	802,147	6.77	0.0297
2019-08-14	2019-06-30	13F	SEI INVESTMENTS	COM	784117103	13,391,242	-266,653	-1.95	751,250	5.27	0.0283
2019-05-15	2019-03-31	13F	SEI INVESTMENTS	COM	784117103	13,657,895	-51,069	-0.37	713,625	12.67	0.0280
2019-02-14	2018-12-31	13F	SEI INVESTMENTS	COM	784117103	13,708,964	279,585	2.08	633,355	-22.81	0.0285
2018-12-13	2018-09-30	13F/A-2	SEI INVESTMENTS	COM	784117103	13,429,379	-87,681	-0.65	820,535	-2.91	0.0321
2018-11-23	2018-09-30	13F/A-1	SEI INVESTMENTS	COM	784117103	13,429,379	0		820,535		0.0321
2018-11-14	2018-09-30	13F	SEI INVESTMENTS	COM	784117103	13,429,379	-87,681		820,535
2018-08-14	2018-06-30	13F	SEI INVESTMENTS	COM	784117103	13,517,060	-159,256	-1.16	845,087	-17.51	0.0354
2018-05-15	2018-03-31	13F	SEI INVESTMENTS	COM	784117103	13,676,316	79,592	0.59	1,024,492	4.85	0.0448
2018-02-14	2017-12-31	13F	SEI INVESTMENTS	COM	784117103	13,596,724	246,917	1.85	977,062	19.86	0.0427
2017-11-14	2017-09-30	13F	SEI INVESTMENTS	COM	784117103	13,349,807	89,207	0.67	815,140	14.30	0.0381
2017-08-24	2017-06-30	13F/A-1	SEI INVESTMENTS	COM	784117103	13,260,600	357,187	2.77	713,155	9.57	0.0351
2017-08-11	2017-06-30	13F	SEI INVESTMENTS	COM	784117103	13,260,600	357,187		713,155
2017-05-12	2017-03-31	13F	SEI INVESTMENTS	COM	784117103	12,903,413	595,691	4.84	650,849	7.13	0.0335
2017-02-14	2016-12-31	13F	SEI INVESTMENTS	COM	784117103	12,307,722	303,912	2.53	607,509	10.96	0.0339
2016-11-14	2016-09-30	13F	SEI INVESTMENTS	COM	784117103	12,003,810	124,392	1.05	547,493	-4.20	0.0322
2016-08-10	2016-06-30	13F	SEI INVESTMENTS	COM	784117103	11,879,418	271,832	2.34	571,519	14.37	0.0355
2016-05-13	2016-03-31	13F	SEI INVESTMENTS	COM	784117103	11,607,586	385,494	3.44	499,706	-15.02	0.0324
2016-02-08	2015-12-31	13F	SEI INVESTMENTS	COM	784117103	11,222,092	238,126	2.17	588,039	11.00	0.0395
2015-11-12	2015-09-30	13F/A-1	SEI INVESTMENTS	COM	784117103	10,983,966	265,190	2.47	529,757	0.80	0.0225
2015-11-12	2015-09-30	13F/A-1	SEI INVESTMENTS	COM	784117103	10,983,966	265,190		529,757		0.0225
2015-08-13	2015-06-30	13F	SEI INVESTMENTS	COM	784117103	10,718,776	253,957	2.43	525,542	13.90	0.0355
2015-05-15	2015-03-31	13F/A-1	SEI INVESTMENTS	COM	784117103	10,464,819	322,449	3.18	461,393	13.62	0.0313
2015-05-14	2015-03-31	13F	SEI INVESTMENTS	COM	784117103	10,464,819			461,393
2015-02-12	2014-12-31	13F	SEI INVESTMENTS	COM	784117103	10,142,370	235,662	2.38	406,101	13.36	0.0292
2014-11-12	2014-09-30	13F	SEI INVESTMENTS	COM	784117103	9,906,708	10,701	0.11	358,227	10.46	0.0279
2014-08-11	2014-06-30	13F	SEI INVESTMENTS	COM	784117103	9,896,007	163,729	1.68	324,292	-0.86	0.0256
2014-05-13	2014-03-31	13F	SEI INVESTMENTS	COM	784117103	9,732,278	126,171	1.31	327,102	-1.95	0.0275
2014-02-12	2013-12-31	13F	SEI INVESTMENTS	COM	784117103	9,606,107	264,021	2.83	333,621	15.53	0.0293
2013-11-07	2013-09-30	13F	SEI INVESTMENTS	COM	784117103	9,342,086	260,606	2.87	288,764	11.84	0.0282
2013-08-13	2013-06-30	13F	SEI INVESTMENTS	COM	784117103	9,081,480	9,081,480		258,186		0.0271

Legend

Shares: The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value: The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price: The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class: This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred

Allocation (%): The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation: The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%): The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis: The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss: This is the market value of the position as of the effective date minus the cost basis.