Acadian Asset Management Llc ownership in FDS / FactSet Research Systems Inc.

FactSet Research Systems Inc.

MX ˙ BMV ˙ US3030751057

Security	MX:FDS / FactSet Research Systems Inc.
Institution	Acadian Asset Management Llc
Latest Disclosed Ownership	10,717 shares
Latest Disclosed Value	$ 2,322

On May 13, 2026 - Acadian Asset Management Llc filed a 13F-HR form disclosing ownership of 10,717 shares of FactSet Research Systems Inc. (MX:FDS) valued at $2,322 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 0 shares of FactSet Research Systems Inc..

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 (%)
2026-05-13	2026-03-31	13F	FACTSET RESH SYS	COM	303075105	10,717	10,717		2		0.0033
2026-02-10	2025-12-31	13F	FACTSET RESH SYS	COM	303075105	0	-8,022	-100.00	0	-100.00
2025-11-13	2025-09-30	13F	FACTSET RESH SYS	COM	303075105	8,022	-925	-10.34	2	-50.00	0.0040
2025-08-07	2025-06-30	13F	FACTSET RESH SYS	COM	303075105	8,947	8,947		4		0.0083
2024-11-12	2024-09-30	13F	FACTSET RESH SYS	COM	303075105	0	-558	-100.00	0		0.0000
2024-08-06	2024-06-30	13F	FACTSET RESH SYS	COM	303075105	558	558		0		0.0007
2024-05-10	2024-03-31	13F	FACTSET RESH SYS	COM	303075105	0	-10,552	-100.00	0	-100.00
2024-02-13	2023-12-31	13F	FACTSET RESH SYS	COM	303075105	10,552	10,453	10,558.59	5		0.0195
2023-11-13	2023-09-30	13F	FACTSET RESH SYS	COM	303075105	99	-8,079	-98.79	0	-100.00	0.0002
2023-08-07	2023-06-30	13F	FACTSET RESH SYS	COM	303075105	8,178	-840	-9.31	3	0.00	0.0135
2023-05-11	2023-03-31	13F	FACTSET RESHRS SYS	COM	303075105	9,018	-9,252	-50.64	4	-57.14	0.0164
2023-02-14	2022-12-31	13F	FACTSET RESH SYS	COM	303075105	18,270	12,809	234.55	7	-99.68	0.0361
2022-11-14	2022-09-30	13F	FACTSET RESH SYS	COM	303075105	5,461	0	0.00	2,185	4.05	0.0120
2022-08-09	2022-06-30	13F	FACTSET RESH SYS	COM	303075105	5,461	0	0.00	2,100	-11.39	0.0107
2022-05-12	2022-03-31	13F	FACTSET RESH SYS	COM	303075105	5,461	-8,877	-61.91	2,370	-65.98	0.0098
2022-02-10	2021-12-31	13F	FACTSET RESH SYS	COM	303075105	14,338	9,988	229.61	6,967	306.48	0.0260
2021-11-12	2021-09-30	13F	FACTSET RESH SYS	COM	303075105	4,350	3,190	275.00	1,714	340.62	0.0065
2021-08-11	2021-06-30	13F	FACTSET RESH SYS	COM	303075105	1,160	1,160		389		0.0015
2021-05-11	2021-03-31	13F	FACTSET RESH SYS	COM	303075105	0	-556	-100.00	0	-100.00
2021-02-11	2020-12-31	13F	FACTSET RESH SYS	COM	303075105	556	325	140.69	185	140.26	0.0007
2020-11-09	2020-09-30	13F	FACTSET RESH SYS	COM	303075105	231	225	3,750.00	77	3,750.00	0.0003
2020-08-12	2020-06-30	13F	FACTSET RESH SYS	COM	303075105	6	0	0.00	2	0.00	0.0000
2020-05-11	2020-03-31	13F	FACTSET RESH SYS	COM	303075105	6	0	0.00	2	0.00	0.0000
2020-02-06	2019-12-31	13F	FACTSET RESH SYS	COM	303075105	6	-174	-96.67	2	-95.35	0.0000
2019-11-07	2019-09-30	13F	FACTSET RESH SYS	COM	303075105	180	180		43		0.0002
2016-10-20	2016-09-30	13F	FACTSET RESH SYS	COM	303075105	0	-20	-100.00	0	-100.00
2016-07-19	2016-06-30	13F	FACTSET RESH SYS	COM	303075105	20	-3	-13.04	3	0.00	0.0000
2016-04-14	2016-03-31	13F	FACTSET RESH SYS	COM	303075105	23	-91,680	-99.97	3	-99.98	0.0000
2016-01-14	2015-12-31	13F	FACTSET RESH SYS	COM	303075105	91,703	-498,068	-84.45	14,909	-84.18	0.0779
2015-10-15	2015-09-30	13F	FACTSET RESH SYS	COM	303075105	589,771	-9,826	-1.64	94,248	-3.28	0.5140
2015-08-11	2015-06-30	13F	FACTSET RESH SYS	COM	303075105	599,597	375,219	167.23	97,443	172.79	0.4727
2015-04-20	2015-03-31	13F/A-1	FACTSET RESH SYS	COM	303075105	224,378	91,851	69.31	35,721	91.50	0.1648
2015-04-16	2015-03-31	13F	FACTSET RESH SYS	COM	303075105	224,378			35,721
2015-01-23	2014-12-31	13F	FACTSET RESH SYS	COM	303075105	132,527	-46,583	-26.01	18,653	-14.31	0.0831
2014-10-22	2014-09-30	13F	FACTSET RESH SYS	COM	303075105	179,110	161,669	926.95	21,768	937.56	0.1051
2014-07-21	2014-06-30	13F	FACTSET RESH SYS	COM	303075105	17,441	15,163	665.63	2,098	749.39	0.0102
2014-01-22	2013-12-31	13F	FACTSET RESH SYS	COM	303075105	2,278	2,278		247		0.0014

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.