Donaldson Company, Inc.
US ˙ NYSE ˙ US2576511099

SecurityDCI / Donaldson Company, Inc.
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership449,931 shares
Latest Disclosed Value $ 38,184,340
Janus Henderson Group Plc reports 0.09% decrease in ownership of DCI / Donaldson Company, Inc.

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 449,931 shares of Donaldson Company, Inc. (US:DCI) valued at $38,185,644 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 450,349 shares of Donaldson Company, Inc.. This represents a change in shares of -0.09% during the quarter. The current value of the position is $37,816,701 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 Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-18 2026-03-31 13F/A-1 DONALDSON COM 257651109 449,931 -418 -0.09 38,184 -4.37 0.0064
2026-05-15 2026-03-31 13F DONALDSON COM 257651109 449,931 -418 38,184 0.0071
2026-02-17 2025-12-31 13F DONALDSON COM 257651109 450,349 -488,812 -52.05 39,929 -48.06 0.0179
2025-11-14 2025-09-30 13F DONALDSON COM 257651109 939,161 -53,254 -5.37 76,869 11.69 0.0351
2025-08-14 2025-06-30 13F DONALDSON COM 257651109 992,415 -181,911 -15.49 68,824 -12.62 0.0337
2025-05-15 2025-03-31 13F DONALDSON COM 257651109 1,174,326 -122,903 -9.47 78,763 -9.85 0.0432
2025-02-14 2024-12-31 13F DONALDSON COM 257651109 1,297,229 22,458 1.76 87,369 -7.01 0.0444
2024-11-14 2024-09-30 13F DONALDSON COM 257651109 1,274,771 -113,729 -8.19 93,951 -5.44 0.0481
2024-08-14 2024-06-30 13F DONALDSON COM 257651109 1,388,500 -644 -0.05 99,360 -4.22 0.0532
2024-05-15 2024-03-31 13F DONALDSON COM 257651109 1,389,144 -21,115 -1.50 103,739 12.56 0.0566
2024-02-14 2023-12-31 13F DONALDSON COM 257651109 1,410,259 -299 -0.02 92,161 9.55 0.0550
2023-11-14 2023-09-30 13F DONALDSON COM 257651109 1,410,558 -87,049 -5.81 84,124 -10.14 0.0551
2023-08-14 2023-06-30 13F DONALDSON COM 257651109 1,497,607 174,631 13.20 93,616 8.30 0.0582
2023-05-15 2023-03-31 13F DONALDSON COM 257651109 1,322,976 31,118 2.41 86,444 13.66 0.0570
2023-02-14 2022-12-31 13F DONALDSON COM 257651109 1,291,858 161,816 14.32 76,053 37.32 0.0543
2023-01-13 2022-09-30 13F/A-1 DONALDSON COM 257651109 1,130,042 -92,746 -7.58 55,384 -5.91 0.0415
2022-11-14 2022-09-30 13F DONALDSON COM 257651109 1,130,042 -92,746 55,384 0.0141
2022-08-15 2022-06-30 13F DONALDSON COM 257651109 1,222,788 -84,624 -6.47 58,864 -13.30 0.0406
2022-05-16 2022-03-31 13F DONALDSON COM 257651109 1,307,412 -189,313 -12.65 67,893 -23.45 0.0328
2022-02-14 2021-12-31 13F DONALDSON COM 257651109 1,496,725 -305,903 -16.97 88,696 -14.29 0.0370
2021-11-16 2021-09-30 13F DONALDSON COM 257651109 1,802,628 -236,914 -11.62 103,489 -20.13 0.0453
2021-08-16 2021-06-30 13F DONALDSON COM 257651109 2,039,542 -59,042 -2.81 129,572 6.16 0.0555
2021-05-17 2021-03-31 13F DONALDSON COM 257651109 2,098,584 732 0.03 122,054 4.12 0.0557
2021-02-16 2020-12-31 13F DONALDSON COM 257651109 2,097,852 -231 -0.01 117,228 20.37 0.0545
2020-11-16 2020-09-30 13F DONALDSON COM 257651109 2,098,083 -135,145 -6.05 97,393 -6.25 0.0508
2020-08-14 2020-06-30 13F DONALDSON COM 257651109 2,233,228 -259,785 -10.42 103,890 7.88 0.0583
2020-05-14 2020-03-31 13F DONALDSON COM 257651109 2,493,013 -1,317,469 -34.57 96,305 -56.14 0.0663
2020-02-18 2019-12-31 13F DONALDSON COM 257651109 3,810,482 -12,724 -0.33 219,560 10.27 0.1124
2019-11-14 2019-09-30 13F DONALDSON COM 257651109 3,823,206 -597,397 -13.51 199,113 -11.44 0.1079
2019-07-31 2019-06-30 13F DONALDSON COM 257651109 4,420,603 296,782 7.20 224,832 8.91 0.1224
2019-04-30 2019-03-31 13F DONALDSON COM 257651109 4,123,821 -138,557 -3.25 206,438 11.62 0.1144
2019-02-06 2018-12-31 13F DONALDSON COM 257651109 4,262,378 -28,847 -0.67 184,945 -26.02 0.1179
2018-11-09 2018-09-30 13F DONALDSON COM 257651109 4,291,225 -69,455 -1.59 250,007 27.07 0.1336
2018-08-10 2018-06-30 13F DONALDSON COM 257651109 4,360,680 368,578 9.23 196,754 9.40 0.1122
2018-05-14 2018-03-31 13F DONALDSON COM 257651109 3,992,102 1,263,141 46.29 179,844 34.63 0.1060
2018-03-12 2017-12-31 13F/A-1 DONALDSON COM 257651109 2,728,961 1,423,009 108.96 133,583 122.66 0.0823
2018-02-09 2017-12-31 13F DONALDSON COM 257651109 2,728,961 1,423,009 133,583
2017-11-14 2017-09-30 13F DONALDSON COM 257651109 1,305,952 -173,654 -11.74 59,995 -10.96 0.0385
2017-08-17 2017-06-30 13F/A-1 DONALDSON COM 257651109 1,479,606 918,729 163.80 67,381 163.92 0.0459
2017-08-14 2017-06-30 13F DONALDSON COM 257651109 1,479,606 918,729 67,381
2017-05-03 2017-03-31 13F DONALDSON COM 257651109 560,877 -25,503 -4.35 25,531 3.47 0.1792
2017-01-30 2016-12-31 13F DONALDSON COM 257651109 586,380 1,115 0.19 24,675 12.94 0.1820
2016-10-24 2016-09-30 13F DONALDSON COM 257651109 585,265 -3,913 -0.66 21,848 7.92 0.1610
2016-07-29 2016-06-30 13F DONALDSON COM 257651109 589,178 215,419 57.64 20,244 69.73 0.1683
2016-05-12 2016-03-31 13F DONALDSON COM 257651109 373,759 -7,360 -1.93 11,927 9.19 0.0967
2016-02-03 2015-12-31 13F DONALDSON COM 257651109 381,119 2,627 0.69 10,923 2.78 0.0876
2015-11-16 2015-09-30 13F DONALDSON COM 257651109 378,492 10,732 2.92 10,628 -19.28 0.0936
2015-08-17 2015-06-30 13F DONALDSON COM 257651109 367,760 -24,473 -6.24 13,166 -32.10 0.1035
2015-06-02 2015-03-31 13F/A-1 DONALDSON COM 257651109 392,233 -14,188 -3.49 19,389 23.49 0.1496
2015-05-15 2015-03-31 13F DONALDSON COM 257651109 392,233 19,389
2015-02-12 2014-12-31 13F DONALDSON COM 257651109 406,421 406,421 15,701 0.1132
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.