Northern Trust Corporation
MX ˙ BMV ˙ US6658591044
SecurityMX:NTRS / Northern Trust Corporation
InstitutionMariner, LLC
Latest Disclosed Ownership180,078 shares
Latest Disclosed Value $ 25,132,296
Mariner, LLC reports 48.23% increase in ownership of NTRS / Northern Trust Corporation

On May 13, 2026 - Mariner, LLC filed a 13F-HR form disclosing ownership of 180,078 shares of Northern Trust Corporation (MX:NTRS) valued at $25,132,296 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 121,489 shares of Northern Trust Corporation. This represents a change in shares of 48.23% 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 NORTHERN TR COM 665859104 180,078 58,589 48.23 25,132 51.40 0.0293
2026-02-13 2025-12-31 13F NORTHERN TR COM 665859104 121,489 33,960 38.80 16,600 40.90 0.0198
2025-11-14 2025-09-30 13F NORTHERN TR COM 665859104 87,529 -6,994 -7.40 11,782 -1.69 0.0152
2025-08-14 2025-06-30 13F NORTHERN TR COM 665859104 94,523 -2,061 -2.13 11,983 25.78 0.0173
2025-05-15 2025-03-31 13F NORTHERN TR COM 665859104 96,584 -6,225 -6.05 9,528 -9.59 0.0159
2025-02-13 2024-12-31 13F NORTHERN TR COM 665859104 102,809 -14,812 -12.59 10,538 -0.49 0.0177
2024-11-13 2024-09-30 13F NORTHERN TR COM 665859104 117,621 -355 -0.30 10,589 6.88 0.0188
2024-08-13 2024-06-30 13F NORTHERN TR COM 665859104 117,976 -2,197 -1.83 9,907 -7.28 0.0192
2024-05-15 2024-03-31 13F NORTHERN TR COM 665859104 120,173 -908 -0.75 10,686 4.59 0.0221
2024-02-14 2023-12-31 13F NORTHERN TR COM 665859104 121,081 -7,800 -6.05 10,217 14.09 0.0242
2023-11-13 2023-09-30 13F NORTHERN TR COM 665859104 128,881 -6,478 -4.79 8,955 -10.77 0.0240
2023-08-11 2023-06-30 13F NORTHERN TR COM 665859104 135,359 3,678 2.79 10,035 91,127.27 0.0268
2023-05-15 2023-03-31 13F NORTHERN TR COM 665859104 131,681 4,272 3.35 12 -99.90 0.0337
2023-02-14 2022-12-31 13F NORTHERN TR COM 665859104 127,409 4,837 3.95 11,274 7.50 0.0362
2022-11-10 2022-09-30 13F NORTHERN TR COM 665859104 122,572 2,099 1.74 10,487 -9.77 0.0419
2022-08-15 2022-06-30 13F NORTHERN TR COM 665859104 120,473 11,753 10.81 11,623 -8.20 0.0477
2022-05-13 2022-03-31 13F NORTHERN TR COM 665859104 108,720 -3,929 -3.49 12,661 -6.03 0.0478
2022-02-14 2021-12-31 13F NORTHERN TR COM 665859104 112,649 2,446 2.22 13,474 13.41 0.0570
2021-11-15 2021-09-30 13F NORTHERN TR COM 665859104 110,203 7,445 7.25 11,881 0.00 0.0620
2021-08-24 2021-06-30 13F NORTHERN TR COM 665859104 102,758 2,413 2.40 11,881 12.65 0.0737
2021-05-07 2021-03-31 13F NORTHERN TR COM 665859104 100,345 4,040 4.20 10,547 17.58 0.0736
2021-02-16 2020-12-31 13F NORTHERN TR COM 665859104 96,305 15,226 18.78 8,970 41.89 0.0688
2020-11-13 2020-09-30 13F NORTHERN TR COM 665859104 81,079 4,439 5.79 6,322 3.96 0.0595
2020-08-14 2020-06-30 13F NORTHERN TR COM 665859104 76,640 12,134 18.81 6,081 24.89 0.0610
2020-05-14 2020-03-31 13F NORTHERN TR COM 665859104 64,506 25,399 64.95 4,869 17.18 0.0608
2020-02-13 2019-12-31 13F NORTHERN TR COM 665859104 39,107 1,781 4.77 4,155 19.29 0.0431
2019-11-13 2019-09-30 13F NORTHERN TR COM 665859104 37,326 -52,518 -58.45 3,483 -56.93 0.0417
2019-08-14 2019-06-30 13F NORTHERN TR COM 665859104 89,844 26,544 41.93 8,086 41.29 0.0965
2019-05-15 2019-03-31 13F NORTHERN TR COM 665859104 63,300 255 0.40 5,723 8.60 0.0816
2019-02-13 2018-12-31 13F NORTHERN TR COM 665859104 63,045 17,032 37.02 5,270 12.15 0.0938
2018-11-14 2018-09-30 13F NORTHERN TR COM 665859104 46,013 -835 -1.78 4,699 -2.51 0.1208
2018-08-14 2018-06-30 13F NORTHERN TR COM 665859104 46,848 34,241 271.60 4,820 270.77 0.1366
2018-05-15 2018-03-31 13F NORTHERN TR COM 665859104 12,607 588 4.89 1,300 8.24 0.0466
2018-02-09 2017-12-31 13F NORTHERN TR COM 665859104 12,019 309 2.64 1,201 11.51 0.0465
2017-11-14 2017-09-30 13F NORTHERN TR COM 665859104 11,710 -58 -0.49 1,077 -5.86 0.0487
2017-08-11 2017-06-30 13F NORTHERN TR COM 665859104 11,768 7,868 201.74 1,144 238.46 0.0538
2017-05-15 2017-03-31 13F NORTHERN TR COM 665859104 3,900 -3,055 -43.93 338 -45.40 0.0147
2017-02-14 2016-12-31 13F NORTHERN TR COM 665859104 6,955 -2,066 -22.90 619 0.98 0.0285
2016-11-14 2016-09-30 13F NORTHERN TR COM 665859104 9,021 9,021 29.71 613 -0.97 0.0296
2016-08-12 2016-06-30 13F NORTHERN TR COM 665859104 0 -9,333 -100.00 0 -100.00
2016-05-13 2016-03-31 13F NORTHERN TR COM 665859104 9,333 6,029 182.48 608 155.46 0.0361
2016-02-16 2015-12-31 13F NORTHERN TR COM 665859104 3,304 -1,201 -26.66 238 -22.48 0.0153
2015-11-16 2015-09-30 13F NORTHERN TR COM 665859104 4,505 -1 -0.02 307 -11.01 0.0136
2015-08-17 2015-06-30 13F Northern Trust COS 665859104 4,506 4,506 0.02 345 12.38 0.0160
2014-11-13 2014-09-30 13F NORTHERN TR COM 665859104 0 -3,585 -100.00 0 -100.00
2014-08-21 2014-06-30 13F NORTHERN TR COM 665859104 3,585 172 5.04 230 2.68 0.0255
2014-05-08 2014-03-31 13F NORTHERN TR COM 665859104 3,413 3,413 224 0.0288
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.