FactSet Research Systems Inc.
MX ˙ BMV ˙ US3030751057
SecurityMX:FDS / FactSet Research Systems Inc.
InstitutionMariner, LLC
Latest Disclosed Ownership26,053 shares
Latest Disclosed Value $ 5,652,534
Mariner, LLC reports 31.08% decrease in ownership of FDS / FactSet Research Systems Inc.

On May 13, 2026 - Mariner, LLC filed a 13F-HR form disclosing ownership of 26,053 shares of FactSet Research Systems Inc. (MX:FDS) valued at $5,652,534 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 37,800 shares of FactSet Research Systems Inc.. This represents a change in shares of -31.08% 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)
2026-05-13 2026-03-31 13F FACTSET RESH SYS COM 303075105 26,053 -11,747 -31.08 5,653 -48.50 0.0066
2026-02-13 2025-12-31 13F FACTSET RESH SYS COM 303075105 37,800 25,757 213.88 10,975 218.12 0.0131
2025-11-14 2025-09-30 13F FACTSET RESH SYS COM 303075105 12,043 -2,124 -14.99 3,450 -45.55 0.0045
2025-08-14 2025-06-30 13F FACTSET RESH SYS COM 303075105 14,167 93 0.66 6,337 -0.97 0.0091
2025-05-15 2025-03-31 13F FACTSET RESH SYS COM 303075105 14,074 -1,475 -9.49 6,398 -14.33 0.0106
2025-02-13 2024-12-31 13F FACTSET RESH SYS COM 303075105 15,549 333 2.19 7,468 6.75 0.0125
2024-11-13 2024-09-30 13F FACTSET RESH SYS COM 303075105 15,216 768 5.32 6,997 18.62 0.0124
2024-08-13 2024-06-30 13F FACTSET RESH SYS COM 303075105 14,448 135 0.94 5,899 -9.30 0.0114
2024-05-15 2024-03-31 13F FACTSET RESH SYS COM 303075105 14,313 1,366 10.55 6,504 5.29 0.0134
2024-02-14 2023-12-31 13F FACTSET RESH SYS COM 303075105 12,947 963 8.04 6,176 17.86 0.0146
2023-11-13 2023-09-30 13F FACTSET RESH SYS COM 303075105 11,984 631 5.56 5,240 15.22 0.0141
2023-08-11 2023-06-30 13F FACTSET RESH SYS COM 303075105 11,353 -62 -0.54 4,549 113,600.00 0.0122
2023-05-15 2023-03-31 13F FACTSET RESH SYS COM 303075105 11,415 -260 -2.23 5 -99.92 0.0138
2023-02-14 2022-12-31 13F FACTSET RESH SYS COM 303075105 11,675 450 4.01 4,706 4.79 0.0151
2022-11-10 2022-09-30 13F FACTSET RESH SYS COM 303075105 11,225 83 0.74 4,491 4.83 0.0180
2022-08-15 2022-06-30 13F FACTSET RESH SYS COM 303075105 11,142 11,142 4,284 0.0176
2021-05-07 2021-03-31 13F FACTSET RESH SYS COM 303075105 0 -10,325 -100.00 0 -100.00
2021-02-16 2020-12-31 13F FACTSET RESH SYS COM 303075105 10,325 10,325 3,433 0.0263
2020-08-14 2020-06-30 13F FACTSET RESH SYS COM 303075105 0 -10,276 -100.00 0 -100.00
2020-05-14 2020-03-31 13F FACTSET RESH SYS COM 303075105 10,276 10,276 2,679 0.0335
2019-11-13 2019-09-30 13F FACTSET RESH SYS COM 303075105 0 -9,795 -100.00 0 -100.00
2019-08-14 2019-06-30 13F FACTSET RESH SYS COM 303075105 9,795 -301 -2.98 2,807 11.97 0.0335
2019-05-15 2019-03-31 13F FACTSET RESH SYS COM 303075105 10,096 5,855 138.06 2,507 195.29 0.0357
2019-02-13 2018-12-31 13F FACTSET RESH SYS COM 303075105 4,241 606 16.67 849 4.43 0.0151
2018-11-14 2018-09-30 13F FACTSET RESH SYS COM 303075105 3,635 -117 -3.12 813 9.42 0.0209
2018-08-14 2018-06-30 13F FACTSET RESH SYS COM 303075105 3,752 -61 -1.60 743 -2.37 0.0211
2018-05-15 2018-03-31 13F FACTSET RESH SYS COM 303075105 3,813 541 16.53 761 20.60 0.0273
2018-02-09 2017-12-31 13F FACTSET RESH SYS COM 303075105 3,272 -139 -4.08 631 2.77 0.0244
2017-11-14 2017-09-30 13F FACTSET RESH SYS COM 303075105 3,411 -364 -9.64 614 -2.07 0.0278
2017-08-11 2017-06-30 13F FACTSET RESH SYS COM 303075105 3,775 346 10.09 627 10.97 0.0295
2017-05-15 2017-03-31 13F FACTSET RESH SYS COM 303075105 3,429 507 17.35 565 18.20 0.0246
2017-02-14 2016-12-31 13F FACTSET RESH SYS COM 303075105 2,922 428 17.16 478 18.02 0.0220
2016-11-14 2016-09-30 13F FACTSET RESH SYS COM 303075105 2,494 177 7.64 405 8.29 0.0196
2016-08-12 2016-06-30 13F FACTSET RESH SYS COM 303075105 2,317 292 14.42 374 21.82 0.0202
2016-05-13 2016-03-31 13F FACTSET RESH SYS COM 303075105 2,025 395 24.23 307 15.85 0.0182
2016-02-16 2015-12-31 13F FACTSET RESH SYS COM 303075105 1,630 313 23.77 265 25.59 0.0170
2015-11-16 2015-09-30 13F FACTSET RESH SYS COM 303075105 1,317 1,317 211 0.0094
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.