FactSet Research Systems Inc.
MX ˙ BMV ˙ US3030751057
SecurityMX:FDS / FactSet Research Systems Inc.
InstitutionRafferty Asset Management, LLC
Latest Disclosed Ownership9,018 shares
Latest Disclosed Value $ 1,956,816
Rafferty Asset Management, LLC reports 21.09% decrease in ownership of FDS / FactSet Research Systems Inc.

On May 15, 2026 - Rafferty Asset Management, LLC filed a 13F-HR form disclosing ownership of 9,018 shares of FactSet Research Systems Inc. (MX:FDS) valued at $1,956,816 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 11,428 shares of FactSet Research Systems Inc.. This represents a change in shares of -21.09% during the quarter.

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 Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F FACTSET RESH SYS COM 303075105 9,018 -2,410 -21.09 1,957 -41.01 0.0079
2026-02-13 2025-12-31 13F FACTSET RESH SYS COM 303075105 11,428 -1,150 -9.14 3,316 -7.97 0.0115
2025-11-12 2025-09-30 13F FACTSET RESH SYS COM 303075105 12,578 -38 -0.30 3,603 -36.14 0.0117
2025-08-14 2025-06-30 13F FACTSET RESH SYS COM 303075105 12,616 148 1.19 5,643 -0.46 0.0186
2025-05-14 2025-03-31 13F FACTSET RESH SYS COM 303075105 12,468 -942 -7.02 5,668 -11.99 0.0242
2025-02-14 2024-12-31 13F FACTSET RESH SYS COM 303075105 13,410 513 3.98 6,441 8.60 0.0228
2024-11-13 2024-09-30 13F FACTSET RESH SYS COM 303075105 12,897 -508 -3.79 5,931 8.37 0.0203
2024-08-13 2024-06-30 13F FACTSET RESH SYS COM 303075105 13,405 0 0.00 5,473 -10.16 0.0203
2024-05-13 2024-03-31 13F FACTSET RESH SYS COM 303075105 13,405 -65 -0.48 6,091 -5.20 0.0227
2024-02-13 2023-12-31 13F FACTSET RESH SYS COM 303075105 13,470 648 5.05 6,426 14.61 0.0271
2023-11-13 2023-09-30 13F FACTSET RESH SYS COM 303075105 12,822 466 3.77 5,607 13.25 0.0330
2023-08-11 2023-06-30 13F FACTSET RESH SYS COM 303075105 12,356 -539 -4.18 4,950 -7.51 0.0279
2023-05-11 2023-03-31 13F FACTSET RESH SYS COM 303075105 12,895 -1,810 -12.31 5,353 -9.27 0.0363
2023-02-13 2022-12-31 13F FACTSET RESH SYS COM 303075105 14,705 1,631 12.48 5,900 12.77 0.0494
2022-11-14 2022-09-30 13F FACTSET RESH SYS COM 303075105 13,074 1,021 8.47 5,231 12.86 0.0557
2022-08-12 2022-06-30 13F FACTSET RESH SYS COM 303075105 12,053 -7,028 -36.83 4,635 -44.05 0.0427
2022-05-13 2022-03-31 13F FACTSET RESH SYS COM 303075105 19,081 -922 -4.61 8,284 -14.79 0.0491
2022-02-10 2021-12-31 13F FACTSET RESH SYS COM 303075105 20,003 1,794 9.85 9,722 35.23 0.0512
2021-11-10 2021-09-30 13F FACTSET RESH SYS COM 303075105 18,209 -3,266 -15.21 7,189 -0.25 0.0491
2021-08-10 2021-06-30 13F FACTSET RESH SYS COM 303075105 21,475 2,688 14.31 7,207 24.32 0.0454
2021-05-10 2021-03-31 13F FACTSET RESH SYS COM 303075105 18,787 3,245 20.88 5,797 12.17 0.0396
2021-02-10 2020-12-31 13F FACTSET RESH SYS COM 303075105 15,542 2,568 19.79 5,168 18.94 0.0505
2020-11-13 2020-09-30 13F FACTSET RESH SYS COM 303075105 12,974 5,143 65.67 4,345 68.93 0.0525
2020-08-07 2020-06-30 13F FACTSET RESH SYS COM 303075105 7,831 6,233 390.05 2,572 516.79 0.0362
2020-05-15 2020-03-31 13F FACTSET RESH SYS COM 303075105 1,598 -4,552 -74.02 417 -74.73 0.0175
2020-02-10 2019-12-31 13F FACTSET RESH SYS COM 303075105 6,150 489 8.64 1,650 20.00 0.0254
2019-11-14 2019-09-30 13F FACTSET RESH SYS COM 303075105 5,661 -797 -12.34 1,375 -25.72 0.0215
2019-08-09 2019-06-30 13F FACTSET RESH SYS COM 303075105 6,458 -1,064 -14.15 1,851 -0.86 0.0325
2019-05-15 2019-03-31 13F FACTSET RESH SYS COM 303075105 7,522 1,027 15.81 1,867 43.62 0.0300
2019-02-11 2018-12-31 13F FACTSET RESH SYS COM 303075105 6,495 -2,309 -26.23 1,300 -34.01 0.0284
2018-11-09 2018-09-30 13F FACTSET RESH SYS COM 303075105 8,804 -1,134 -11.41 1,970 0.05 0.0305
2018-08-14 2018-06-30 13F FACTSET RESH SYS COM 303075105 9,938 211 2.17 1,969 1.49 0.0294
2018-05-15 2018-03-31 13F FACTSET RESH SYS COM 303075105 9,727 1,313 15.60 1,940 19.61 0.0287
2018-02-14 2017-12-31 13F FACTSET RESH SYS COM 303075105 8,414 1,976 30.69 1,622 39.83 0.0280
2017-11-13 2017-09-30 13F FACTSET RESH SYS COM 303075105 6,438 719 12.57 1,160 22.11 0.0260
2017-08-11 2017-06-30 13F FACTSET RESH SYS COM 303075105 5,719 -1,536 -21.17 950 -20.57 0.0273
2017-05-11 2017-03-31 13F FACTSET RESH SYS COM 303075105 7,255 5,245 260.95 1,196 264.63 0.0264
2017-02-13 2016-12-31 13F FACTSET RESH SYS COM 303075105 2,010 -552 -21.55 328 -20.96 0.0150
2016-11-14 2016-09-30 13F FACTSET RESH SYS COM 303075105 2,562 -1,750 -40.58 415 -40.37 0.0152
2016-08-09 2016-06-30 13F FACTSET RESH SYS COM 303075105 4,312 -1,206 -21.86 696 -16.75 0.0471
2016-05-12 2016-03-31 13F FACTSET RESH SYS COM 303075105 5,518 1,800 48.41 836 38.41 0.0454
2016-02-12 2015-12-31 13F FACTSET RESH SYS COM 303075105 3,718 -241 -6.09 604 -4.58 0.0727
2015-11-12 2015-09-30 13F FACTSET RESH SYS COM 303075105 3,959 2,083 111.03 633 107.54 0.0500
2015-08-12 2015-06-30 13F FACTSET RESH SYS COM 303075105 1,876 -480 -20.37 305 -18.67 0.0205
2015-05-14 2015-03-31 13F FACTSET RESH SYS COM 303075105 2,356 2,356 0.00 375 0.0283
2014-11-14 2014-09-30 13F FACTSET RESH SYS COM 303075105 0 -2,010 -100.00 0 -100.00
2014-08-13 2014-06-30 13F FACTSET RESH SYS COM 303075105 2,010 2,010 242 0.0465
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.