Donaldson Company, Inc.
US ˙ NYSE ˙ US2576511099

SecurityDCI / Donaldson Company, Inc.
InstitutionBoston Trust Walden Corp
Latest Disclosed Ownership1,900,416 shares
Latest Disclosed Value $ 161,288,269
Boston Trust Walden Corp reports 20.57% decrease in ownership of DCI / Donaldson Company, Inc.

On April 24, 2026 - Boston Trust Walden Corp filed a 13F-HR form disclosing ownership of 1,900,416 shares of Donaldson Company, Inc. (US:DCI) valued at $161,288,306 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 2,392,579 shares of Donaldson Company, Inc.. This represents a change in shares of -20.57% during the quarter. The current value of the position is $161,991,460 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)
2026-04-24 2026-03-31 13F DONALDSON COMMON STOCK 257651109 1,900,416 -492,163 -20.57 161,288 -23.97 0.7930
2026-01-28 2025-12-31 13F DONALDSON COMMON STOCK 257651109 2,392,579 -310,146 -11.48 212,126 -4.11 0.9599
2025-10-17 2025-09-30 13F DONALDSON COMMON STOCK 257651109 2,702,725 -123,191 -4.36 221,218 12.88 1.6230
2025-07-28 2025-06-30 13F DONALDSON COMMON STOCK 257651109 2,825,916 203,957 7.78 195,977 11.46 1.3978
2025-04-21 2025-03-31 13F DONALDSON COMMON STOCK 257651109 2,621,959 -27,873 -1.05 175,829 -1.48 1.2846
2025-01-24 2024-12-31 13F DONALDSON COMMON STOCK 257651109 2,649,832 -2,725 -0.10 178,466 -8.71 1.2523
2024-10-24 2024-09-30 13F DONALDSON COMMON STOCK 257651109 2,652,557 -148,860 -5.31 195,493 -2.48 1.3600
2024-07-19 2024-06-30 13F DONALDSON COMMON STOCK 257651109 2,801,417 3,320 0.12 200,469 -4.06 1.4869
2024-04-22 2024-03-31 13F DONALDSON COMMON STOCK 257651109 2,798,097 -18,203 -0.65 208,962 13.54 1.4906
2024-01-24 2023-12-31 13F DONALDSON COMMON STOCK 257651109 2,816,300 42,365 1.53 184,045 11.25 1.3885
2023-10-18 2023-09-30 13F DONALDSON COMMON STOCK 257651109 2,773,935 62,995 2.32 165,437 -2.37 1.3865
2023-07-24 2023-06-30 13F DONALDSON COMMON STOCK 257651109 2,710,940 80,040 3.04 169,461 -1.42 1.3898
2023-04-19 2023-03-31 13F DONALDSON COMMON STOCK 257651109 2,630,900 25,960 1.00 171,903 12.10 1.4837
2023-01-20 2022-12-31 13F DONALDSON COMMON STOCK 257651109 2,604,940 8,426 0.32 153,353 20.51 1.3484
2022-10-19 2022-09-30 13F DONALDSON COMMON STOCK 257651109 2,596,514 16,867 0.65 127,255 2.47 1.2607
2022-07-22 2022-06-30 13F DONALDSON COMMON STOCK 257651109 2,579,647 39,559 1.56 124,184 -5.85 1.1735
2022-04-20 2022-03-31 13F DONALDSON COMMON STOCK 257651109 2,540,088 112,333 4.63 131,907 -8.31 1.0895
2022-01-21 2021-12-31 13F DONALDSON COMMON STOCK 257651109 2,427,755 -8,269 -0.34 143,869 2.87 1.1552
2021-10-25 2021-09-30 13F DONALDSON COMMON STOCK 257651109 2,436,024 351,362 16.85 139,852 5.60 1.2383
2021-07-22 2021-06-30 13F DONALDSON COMMON STOCK 257651109 2,084,662 10,764 0.52 132,439 9.80 1.1775
2021-04-21 2021-03-31 13F DONALDSON COMMON STOCK 257651109 2,073,898 60,208 2.99 120,618 7.19 1.1680
2021-01-15 2020-12-31 13F DONALDSON COMMON STOCK 257651109 2,013,690 -112,637 -5.30 112,525 14.00 1.2004
2020-10-14 2020-09-30 13F DONALDSON COMMON STOCK 257651109 2,126,327 28,499 1.36 98,704 1.14 1.2293
2020-07-23 2020-06-30 13F DONALDSON COMMON STOCK 257651109 2,097,828 88,686 4.41 97,591 25.74 1.3178
2020-04-24 2020-03-31 13F/A-1 DONALDSON COMMON STOCK 257651109 2,009,142 -38,599 -1.88 77,613 -34.22 1.2369
2020-04-21 2020-03-31 13F DONALDSON COMMON STOCK 257651109 2,150,714 102,973 83,082 736,713.2773
2020-01-10 2019-12-31 13F DONALDSON COMMON STOCK 257651109 2,047,741 48,713 2.44 117,991 13.33 1.3733
2019-10-21 2019-09-30 13F DONALDSON COMMON STOCK 257651109 1,999,028 35,793 1.82 104,109 4.27 1.3088
2019-07-25 2019-06-30 13F DONALDSON COMMON STOCK 257651109 1,963,235 30,536 1.58 99,850 3.20 1.2993
2019-04-16 2019-03-31 13F DONALDSON COMMON STOCK 257651109 1,932,699 327,898 20.43 96,751 38.95 1.3172
2019-01-17 2018-12-31 13F DONALDSON COMMON STOCK 257651109 1,604,801 15,488 0.97 69,632 -24.80 1.1079
2018-10-23 2018-09-30 13F DONALDSON COMMON STOCK 257651109 1,589,313 -4,201 -0.26 92,594 28.78 1.2755
2018-07-25 2018-06-30 13F DONALDSON COMMON STOCK 257651109 1,593,514 28,665 1.83 71,900 1.99 1.0551
2018-04-13 2018-03-31 13F DONALDSON COMMON STOCK 257651109 1,564,849 416,216 36.24 70,496 25.38 1.0696
2018-01-29 2017-12-31 13F DONALDSON COMMON STOCK 257651109 1,148,633 -13,831 -1.19 56,226 5.28 0.8242
2017-10-13 2017-09-30 13F DONALDSON COMMON STOCK 257651109 1,162,464 111,400 10.60 53,404 11.57 0.8316
2017-07-19 2017-06-30 13F DONALDSON COMMON STOCK 257651109 1,051,064 25,231 2.46 47,865 2.50 0.7691
2017-04-24 2017-03-31 13F DONALDSON COMMON STOCK 257651109 1,025,833 -43,107 -4.03 46,696 3.81 0.7277
2017-02-07 2016-12-31 13F/A-1 DONALDSON COMMON STOCK 257651109 1,068,940 -21,270 -1.95 44,981 10.53 0.7091
2017-02-01 2016-12-31 13F DONALDSON COMMON STOCK 257651109 1,068,940 44,981
2016-10-17 2016-09-30 13F DONALDSON COMMON STOCK 257651109 1,090,210 -5,426 -0.50 40,697 8.10 0.6709
2016-08-09 2016-06-30 13F DONALDSON COMMON STOCK 257651109 1,095,636 -7,511 -0.68 37,646 6.95 0.6430
2016-04-19 2016-03-31 13F DONALDSON COMMON STOCK 257651109 1,103,147 418,560 61.14 35,201 79.41 0.6129
2016-01-21 2015-12-31 13F DONALDSON COMMON STOCK 257651109 684,587 -123,348 -15.27 19,620 -13.52 0.3639
2015-10-29 2015-09-30 13F DONALDSON COMMON STOCK 257651109 807,935 14,207 1.79 22,687 -20.16 0.3790
2015-07-17 2015-06-30 13F DONALDSON COMMON STOCK 257651109 793,728 -421,093 -34.66 28,416 -37.97 0.4333
2015-04-15 2015-03-31 13F DONALDSON COMMON STOCK 257651109 1,214,821 1,214,821 0.00 45,811 0.6800
2015-01-28 2014-12-31 13F DONALDSON COMMON STOCK 257651109 0 -1,426,427 -100.00 0 -100.00
2014-10-23 2014-09-30 13F DONALDSON COMMON STOCK 257651109 1,426,427 -217,509 -13.23 57,955 -16.70 0.8950
2014-08-01 2014-06-30 13F DONALDSON COMMON STOCK 257651109 1,643,936 -154,857 -8.61 69,572 -8.78 1.0111
2014-04-11 2014-03-31 13F DONALDSON COMMON STOCK 257651109 1,798,793 -5,063 -0.28 76,269 -2.71 1.1329
2014-02-11 2013-12-31 13F DONALDSON COMMON STOCK 257651109 1,803,856 -27,672 -1.51 78,396 12.26 1.1437
2013-11-15 2013-09-30 13F DONALDSON COMMON STOCK 257651109 1,831,528 -49,075 -2.61 69,836 4.14 1.0685
2013-08-08 2013-06-30 13F DONALDSON COMMON STOCK 257651109 1,880,603 1,880,603 67,062 1.0827
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.