Blair William & Co/il reports 44.98% decrease in ownership of FA1 / FactSet Research Systems Inc.

FactSet Research Systems Inc.

DE ˙ DB ˙ US3030751057

218,40 € ↑1,20 (0,55%)

2026-06-05
DEL PRIS

Security	DE:FA1 / FactSet Research Systems Inc.
Institution	Blair William & Co/il
Latest Disclosed Ownership	1,766 shares
Latest Disclosed Value	$ 383,255

On May 8, 2026 - Blair William & Co/il filed a 13F-HR form disclosing ownership of 1,766 shares of FactSet Research Systems Inc. (DE:FA1) valued at $315,054 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 3,210 shares of FactSet Research Systems Inc.. This represents a change in shares of -44.98% during the quarter. The current value of the position is $385,694 USD.

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 (%)
2026-05-08	2026-03-31	13F	FACTSET RESH SYS	COM	303075105	1,766	-1,444	-44.98	383	-58.86	0.0011
2026-02-17	2025-12-31	13F	FACTSET RESH SYS	COM	303075105	3,210	1,086	51.13	931	53.13	0.0025
2025-11-12	2025-09-30	13F	FACTSET RESH SYS	COM	303075105	2,124	-191	-8.25	609	-41.26	0.0016
2025-07-24	2025-06-30	13F	FACTSET RESH SYS	COM	303075105	2,315	20	0.87	1,036	-0.77	0.0029
2025-05-09	2025-03-31	13F	FACTSET RESH SYS	COM	303075105	2,295	-63	-2.67	1,043	-7.86	0.0031
2025-02-12	2024-12-31	13F	FACTSET RESH SYS	COM	303075105	2,358	46	1.99	1,132	6.49	0.0033
2024-11-12	2024-09-30	13F	FACTSET RESH SYS	COM	303075105	2,312	122	5.57	1,063	18.90	0.0031
2024-08-12	2024-06-30	13F	FACTSET RESH SYS	COM	303075105	2,190	-56	-2.49	894	-12.35	0.0028
2024-05-09	2024-03-31	13F	FACTSET RESH SYS	COM	303075105	2,246	-659	-22.69	1,021	-26.35	0.0032
2024-02-12	2023-12-31	13F	FACTSET RESH SYS	COM	303075105	2,905	-2,592	-47.15	1,386	-42.36	0.0047
2023-11-09	2023-09-30	13F	FACTSET RESH SYS	COM	303075105	5,497	-285	-4.93	2,403	3.76	0.0092
2023-08-11	2023-06-30	13F	FACTSET RESH SYS	COM	303075105	5,782	1,065	22.58	2,316	18.34	0.0085
2023-05-12	2023-03-31	13F	FACTSET RESH SYS	COM	303075105	4,717	2,015	74.57	1,958	80.70	0.0078
2023-02-10	2022-12-31	13F	FACTSET RESH SYS	COM	303075105	2,702	-125	-4.42	1,084	-4.24	0.0047
2022-11-09	2022-09-30	13F	FACTSET RESH SYS	COM	303075105	2,827	146	5.45	1,131	9.70	0.0052
2022-08-10	2022-06-30	13F	FACTSET RESH SYS	COM	303075105	2,681	-183	-6.39	1,031	-17.06	0.0046
2022-05-13	2022-03-31	13F	FACTSET RESH SYS	COM	303075105	2,864	-294	-9.31	1,243	-19.02	0.0044
2022-02-14	2021-12-31	13F	FACTSET RESH SYS	COM	303075105	3,158	149	4.95	1,535	29.21	0.0048
2021-11-12	2021-09-30	13F	FACTSET RESH SYS	COM	303075105	3,009	0	0.00	1,188	17.62	0.0040
2021-08-12	2021-06-30	13F	FACTSET RESH SYS	COM	303075105	3,009	7	0.23	1,010	9.07	0.0035
2021-05-13	2021-03-31	13F	FACTSET RESH SYS	COM	303075105	3,002	360	13.63	926	5.47	0.0035
2021-02-09	2020-12-31	13F	FACTSET RESH SYS	COM	303075105	2,642	147	5.89	878	5.15	0.0032
2020-11-06	2020-09-30	13F	FACTSET RESH SYS	COM	303075105	2,495	-101	-3.89	835	-2.11	0.0035
2020-08-12	2020-06-30	13F	FACTSET RESH SYS	COM	303075105	2,596	-339	-11.55	853	11.50	0.0041
2020-05-11	2020-03-31	13F	FACTSET RESH SYS	COM	303075105	2,935	39	1.35	765	-1.54	0.0048
2020-02-13	2019-12-31	13F	FACTSET RESH SYS	COM	303075105	2,896	-232	-7.42	777	2.24	0.0040
2019-11-12	2019-09-30	13F	FACTSET RESH SYS	COM	303075105	3,128	-75	-2.34	760	-17.21	0.0044
2019-08-13	2019-06-30	13F	FACTSET RESH SYS	COM	303075105	3,203	7	0.22	918	15.76	0.0052
2019-05-14	2019-03-31	13F	FACTSET RESH SYS	COM	303075105	3,196	194	6.46	793	31.95	0.0048
2019-02-14	2018-12-31	13F	FACTSET RESH SYS	COM	303075105	3,002	22	0.74	601	-9.90	0.0044
2018-11-13	2018-09-30	13F	FACTSET RESH SYS	COM	303075105	2,980	264	9.72	667	23.98	0.0041
2018-08-13	2018-06-30	13F	FACTSET RESH SYS	COM	303075105	2,716	0	0.00	538	-0.74	0.0037
2018-05-15	2018-03-31	13F	FACTSET RESH SYS	COM	303075105	2,716	-1,032	-27.53	542	-24.93	0.0038
2018-02-14	2017-12-31	13F	FACTSET RESH SYS	COM	303075105	3,748	-291	-7.20	722	-0.69	0.0049
2017-11-13	2017-09-30	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	4,039	523	14.87	727	24.49	0.0055
2017-08-04	2017-06-30	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	3,516	-3,035	-46.33	584	-46.67	0.0044
2017-05-10	2017-03-31	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	6,551	-312	-4.55	1,095	-2.41	0.0088
2017-02-14	2016-12-31	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	6,863	-72	-1.04	1,122	-0.18	0.0100
2016-11-14	2016-09-30	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	6,935	-389	-5.31	1,124	-4.91	0.0099
2016-08-08	2016-06-30	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	7,324	-257	-3.39	1,182	2.96	0.0110
2016-05-16	2016-03-31	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	7,581	-5,523	-42.15	1,148	-46.10	0.0108
2016-02-16	2015-12-31	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	13,104	-25,150	-65.74	2,130	-65.16	0.0200
2015-11-12	2015-09-30	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	38,254	-322,922	-89.41	6,113	-89.58	0.0529
2015-08-03	2015-06-30	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	361,176	4,815	1.35	58,694	3.46	0.0878
2015-05-11	2015-03-31	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	356,361	356,361	0.00	56,732		0.0873
2015-02-05	2014-12-31	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	0	-1,171,361	-100.00	0	-100.00
2014-11-04	2014-09-30	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	1,171,361	-365,301	-23.77	142,355	-22.98	0.2435
2014-08-01	2014-06-30	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	1,536,662	-67,100	-4.18	184,829	6.90	0.3018
2014-05-06	2014-03-31	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	1,603,762	351,422	28.06	172,902	27.15	0.2860
2014-02-11	2013-12-31	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	1,252,340	-34,940	-2.71	135,978	-3.18	0.2247
2013-11-12	2013-09-30	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	1,287,280	182,183	16.49	140,442	24.67	0.2497
2013-08-07	2013-06-30	13F	FACTSET RESEARCH SYSTEMS	COM	303075105	1,105,097	1,105,097		112,653		0.2228

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.