William Frels - Mairs & Power
Holding/activity history for Donaldson Co., Inc. (DCI)
← All DCI superinvestors
| Period | Shares | % of Portfolio | Activity | % Change to Portfolio | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026 Q1 | 499,374 | 0.43 | Reduce 10.93% | 0.05 | $80.56–96.36 · VW $86.26i | $42,381,944 | SEC |
| 2025 Q4 | 560,653 | 0.48 | Reduce 7.40% | 0.03 | $86.05–112.84 · VW $97.22i | $49,707,454 | SEC |
| 2025 Q3 | 605,439 | 0.47 | Reduce 27.01% | 0.15 | $78.52–90.94 · VW $86.45i | $49,555,144 | SEC |
| 2025 Q2 | 829,505 | 0.57 | Reduce 25.95% | 0.20 | $67.71–83.31 · VW $76.90i | $57,526,140 | SEC |
| 2025 Q1 | 1,120,149 | 0.78 | Reduce 14.49% | 0.12 | $57.45–71.36 · VW $66.12i | $75,117,161 | SEC |
| 2024 Q4 | 1,309,975 | 0.85 | Reduce 4.52% | 0.04 | $65.10–78.38 · VW $70.86i | $88,226,785 | SEC |
| 2024 Q3 | 1,371,962 | 0.95 | Reduce 8.46% | 0.09 | $68.94–78.95 · VW $75.31i | $101,113,565 | SEC |
| 2024 Q2 | 1,498,820 | 1.04 | Reduce 6.38% | 0.07 | $69.00–78.03 · VW $73.25i | $107,255,526 | SEC |
| 2024 Q1 | 1,601,031 | 1.16 | Reduce 15.23% | 0.20 | $70.72–75.98 · VW $73.46i | $119,564,961 | SEC |
| 2023 Q4 | 1,888,681 | 1.30 | Reduce 2.89% | 0.04 | $60.57–71.87 · VW $68.02i | $123,425,273 | SEC |
| 2023 Q3 | 1,944,960 | 1.36 | Reduce 13.19% | 0.20 | $57.05–64.91 · VW $60.93i | $115,997,387 | SEC |
| 2023 Q2 | 2,240,555 | 1.52 | Reduce 7.91% | 0.14 | $58.07–65.21 · VW $62.38i | $140,057,064 | SEC |
| 2023 Q1 | 2,432,943 | 1.83 | Reduce 13.31% | 0.26 | $58.06–66.96 · VW $61.18i | $158,968,465 | SEC |
| 2022 Q4 | 2,806,573 | 1.99 | Reduce 6.88% | 0.13 | $58.10–64.36 · VW $61.90i | $165,222,925 | SEC |
| 2022 Q3 | 3,013,809 | 1.86 | Reduce 3.22% | 0.06 | $48.17–61.50 · VW $56.86i | $147,707,000 | SEC |
| 2022 Q2 | 3,114,007 | 1.80 | Reduce 5.90% | 0.10 | $46.00–57.17 · VW $51.51i | $149,908,000 | SEC |
| 2022 Q1 | 3,309,202 | 1.73 | Reduce 0.50% | <0.01 | $48.14–54.62 · VW $51.68i | $171,847,000 | SEC |
| 2021 Q4 | 3,325,810 | 1.83 | Reduce 0.34% | <0.01 | $51.02–60.78 · VW $55.36i | $197,087,000 | SEC |
| 2021 Q3 | 3,337,119 | 1.92 | Reduce 0.00% | <0.01 | $56.03–67.83 · VW $60.10i | $191,584,000 | SEC |
| 2021 Q2 | 3,337,209 | 2.10 | Reduce 1.22% | 0.03 | $60.52–69.35 · VW $65.87i | $212,013,000 | SEC |
| 2021 Q1 | 3,378,569 | 2.06 | Reduce 3.85% | 0.08 | $56.82–65.47 · VW $61.29i | $196,498,000 | SEC |
| 2020 Q4 | 3,513,835 | 2.18 | Reduce 1.83% | 0.04 | $52.50–62.70 · VW $58.04i | $196,353,000 | SEC |
| 2020 Q3 | 3,579,271 | 2.08 | Reduce 2.96% | 0.07 | $45.20–55.21 · VW $51.22i | $166,150,000 | SEC |
| 2020 Q2 | 3,688,482 | 2.24 | Reduce 15.21% | 0.37 | $42.59–52.75 · VW $48.57i | $171,588,000 | SEC |
| 2020 Q1 | 4,350,087 | 2.45 | Reduce 1.45% | 0.04 | $31.08–48.99 · VW $42.51i | $168,044,000 | SEC |
| 2019 Q4 | 4,414,184 | 2.89 | Reduce 6.64% | 0.20 | $43.84–58.32 · VW $49.08i | $254,345,000 | SEC |
| 2019 Q3 | 4,728,243 | 2.98 | Reduce 5.45% | 0.17 | $46.04–56.56 · VW $52.89i | $246,247,000 | SEC |
| 2019 Q2 | 5,000,831 | 3.05 | Reduce 0.93% | 0.03 | $45.82–51.52 · VW $48.57i | $254,342,000 | SEC |
| 2019 Q1 | 5,047,602 | 3.07 | Add 1.08% | 0.03 | $46.88–53.95 · VW $49.43i | $252,683,000 | SEC |
| 2018 Q4 | 4,993,732 | 2.92 | Reduce 1.87% | 0.06 | $40.27–57.31 · VW $49.72i | $216,678,000 | SEC |
| 2018 Q3 | 5,088,833 | 3.45 | Reduce 5.76% | 0.17 | $49.61–59.43 · VW $55.03i | $296,475,000 | SEC |
| 2018 Q2 | 5,400,013 | 3.02 | Reduce 2.20% | 0.07 | $44.36–50.79 · VW $48.58i | $243,649,000 | SEC |
| 2018 Q1 | 5,521,259 | 3.07 | Add 1.26% | 0.04 | $43.35–48.60 · VW $46.38i | $248,733,000 | SEC |
| 2017 Q4 | 5,452,784 | 3.10 | Add 2.16% | 0.07 | $44.85–52.20 · VW $48.17i | $266,914,000 | SEC |
| 2017 Q3 | 5,337,294 | 2.94 | Add 1.49% | 0.04 | $42.59–50.10 · VW $47.53i | $245,195,000 | SEC |
| 2017 Q2 | 5,259,183 | 2.90 | Add 0.06% | <0.01 | $44.66–48.91 · VW $46.94i | $239,503,000 | SEC |
| 2017 Q1 | 5,256,200 | 2.93 | Reduce 1.58% | 0.05 | $43.75–48.12 · VW $46.61i | $239,262,000 | SEC |
| 2016 Q4 | 5,340,576 | 2.89 | Reduce 4.68% | 0.13 | $41.28–46.29 · VW $43.51i | $224,731,000 | SEC |
| 2016 Q3 | 5,602,673 | 2.76 | Reduce 1.12% | 0.03 | $35.59–40.96 · VW $39.04i | $209,148,000 | SEC |
| 2016 Q2 | 5,666,127 | 2.63 | Add 3.95% | 0.10 | $32.92–37.95 · VW $36.14i | $194,688,000 | SEC |
| 2016 Q1 | 5,450,706 | 2.47 | Add 1.78% | 0.04 | $27.65–33.77 · VW $31.64i | $173,932,000 | SEC |
| 2015 Q4 | 5,355,148 | 2.30 | Add 0.96% | 0.02 | $25.21–31.65 · VW $28.37i | $153,479,000 | SEC |
| 2015 Q3 | 5,304,175 | 2.33 | Add 1.68% | 0.04 | $26.36–32.70 · VW $30.15i | $148,941,000 | SEC |
| 2015 Q2 | 5,216,445 | 2.64 | Add 0.49% | 0.01 | $29.85–36.61 · VW $32.59i | $186,749,000 | SEC |
| 2015 Q1 | 5,191,158 | 2.69 | Add 2.30% | 0.06 | $34.84–38.32 · VW $36.27i | $195,759,000 | SEC |
| 2014 Q4 | 5,074,213 | 2.72 | Add 8.10% | 0.20 | $36.04–39.49 · VW $37.52i | $196,017,000 | SEC |
| 2014 Q3 | 4,694,139 | 2.78 | Add 4.16% | 0.11 | $36.47–43.31 · VW $39.59i | $190,723,000 | SEC |
| 2014 Q2 | 4,506,485 | 2.75 | Add 6.06% | 0.16 | $38.26–42.60 · VW $40.91i | $190,714,000 | SEC |
| 2014 Q1 | 4,248,805 | 2.79 | Reduce 0.11% | <0.01 | $39.19–43.39 · VW $41.10i | $180,149,000 | SEC |
| 2013 Q4 | 4,253,337 | 2.98 | Add 2.82% | 0.08 | $38.66–43.74 · VW $41.75i | $184,850,000 | SEC |
| 2013 Q3 | 4,136,649 | 2.86 | Add 5.55% | 0.15 | $34.60–42.29 · VW $39.54i | $157,730,000 | SEC |
| 2013 Q2 | 3,918,954 | 2.80 | Add 0.93% | 0.03 | $34.35–38.09 · VW $35.89i | $139,750,000 | SEC |
| 2013 Q1 | 3,882,768 | 1.43 | Add 1.94% | 0.03 | $34.26–39.36 · VW $37.04i | $140,517,000 | SEC |
| 2012 Q4 | 3,808,897 | 3.12 | Add 0.85% | 0.03 | $32.26–38.30 · VW $35.53i | $125,084,000 | SEC |
| 2012 Q3 | 3,776,939 | 3.23 | Add 2.11% | 0.07 | $30.90–36.96 · VW $33.81i | $131,098,000 | SEC |
| 2012 Q2 | 3,699,021 | 3.22 | Reduce 0.19% | <0.01 | $30.51–38.18 · VW $34.66i | $123,436,000 | SEC |
| 2012 Q1 | 3,705,920 | 3.40 | Reduce 3.48% | 0.13 | $32.51–37.22 · VW $35.17i | $132,413,000 | SEC |
| 2011 Q4 | 3,839,588 | 3.76 | Reduce 6.08% | 0.22 | $33.13–38.89 · VW $36.24i | $130,700,000 | SEC |
| 2011 Q3 | 4,088,172 | 3.60 | Reduce 0.98% | 0.02 | $25.79–34.81 · VW $31.59i | $112,016,000 | SEC |
| 2011 Q2 | 4,128,680 | 1.70 | Reduce 0.56% | 0.02 | $23.18–31.44 · VW $28.04i | $125,264,000 | SEC |
| 2011 Q1 | 4,152,020 | 3.48 | Reduce 0.99% | 0.03 | $27.45–31.52 · VW $29.61i | $127,239,000 | SEC |
| 2010 Q4 | 4,193,460 | 3.52 | Reduce 0.62% | <0.01 | $27.30–31.00 · VW $28.81i | $122,197,000 | SEC |
| 2010 Q3 | 4,219,784 | 1.57 | Reduce 0.37% | 0.01 | $21.00–27.49 · VW $25.21i | $99,439,202,000 | SEC |
| 2010 Q2 | 4,235,346 | 3.10 | Reduce 5.59% | 0.09 | $20.35–24.13 · VW $21.81i | $90,318,747,000 | SEC |
| 2010 Q1 | 4,486,076 | 1.53 | Reduce 6.94% | 0.11 | $20.25–23.69 · VW $21.84i | $101,205,867,000 | SEC |
| 2009 Q4 | 4,820,636 | 1.62 | Reduce 12.26% | 0.19 | $18.62–21.86 · VW $20.37i | $102,534,921,000 | SEC |
| 2009 Q3 | 5,494,218 | 1.57 | Reduce 2.17% | 0.04 | $16.30–22.59 · VW $20.05i | $95,132,385,000 | SEC |
| 2009 Q2 | 5,615,860 | 1.85 | Add 2.56% | 0.05 | $15.68–19.91 · VW $18.12i | $97,266,695,000 | SEC |
| 2009 Q1 | 5,475,912 | 1.66 | Reduce 0.77% | 0.01 | $10.91–17.45 · VW $15.07i | $73,486,739,000 | SEC |
| 2008 Q4 | 5,518,312 | 1.77 | Reduce 0.08% | <0.01 | $12.18–18.09 · VW $14.16i | $92,845,599,000 | SEC |
| 2008 Q3 | 5,522,862 | 1.69 | Reduce 0.57% | 0.01 | $11.70–24.50 · VW $17.77i | $115,731,573,000 | SEC |
| 2008 Q2 | 5,554,662 | 1.84 | Reduce 9.24% | 0.16 | $20.48–26.00 · VW $22.81i | $123,980,056,000 | SEC |
| 2008 Q1 | 6,120,468 | 1.70 | Reduce 3.18% | 0.09 | $19.42–26.17 · VW $23.77i | $123,266,226,000 | SEC |
| 2007 Q4 | 6,321,368 | 2.98 | Reduce 0.44% | <0.01 | $17.57–24.20 · VW $20.95i | $146,592,524 | SEC |
| 2007 Q3 | 6,349,526 | 1.59 | Add 0.25% | <0.01 | $19.17–23.50 · VW $22.02i | $132,578,103,000 | SEC |
| 2007 Q2 | 6,333,520 | 1.36 | Add 1.94% | 0.03 | $17.06–22.30 · VW $19.48i | $112,578,318 | SEC |
| 2007 Q1 | 6,213,290 | 1.43 | Add 3.33% | 0.05 | $17.19–19.44 · VW $18.30i | $112,149,885 | SEC |
| 2006 Q4 | 6,012,810 | 1.34 | Add 0.70% | <0.01 | $16.80–19.35 · VW $18.02i | $104,352,318 | SEC |
| 2006 Q3 | 5,971,090 | 3.02 | Reduce 8.05% | 0.23 | $16.50–19.49 · VW $17.83i | $110,166,611 | SEC |
| 2006 Q2 | 6,494,058 | 2.82 | Add 7.93% | 0.21 | $15.08–17.00 · VW $16.26i | $109,976,872 | SEC |
| 2006 Q1 | 6,017,146 | 1.39 | Reduce 0.39% | <0.01 | $15.49–17.15 · VW $16.41i | $101,659,682 | SEC |
| 2005 Q4 | 6,040,546 | 1.40 | Add 0.11% | <0.01 | $15.77–18.00 · VW $17.03i | $96,044,681 | SEC |
| 2005 Q3 | 6,033,686 | 2.88 | Add 2.86% | 0.08 | $14.30–16.75 · VW $15.92i | $92,104,217 | SEC |
| 2005 Q2 | 5,865,686 | 1.39 | Add 4.06% | 0.05 | $14.80–16.44 · VW $15.52i | $88,953,128 | SEC |
| 2005 Q1 | 5,636,952 | 1.52 | Add 4.12% | 0.06 | $14.70–16.42 · VW $15.72i | $90,980,405 | SEC |
| 2004 Q4 | 5,413,952 | 1.58 | Add 4.01% | 0.06 | $14.52–16.45 · VW $15.64i | $88,193,278 | SEC |
| 2004 Q3 | 5,205,000 | 3.16 | Add 7.20% | 0.21 | $13.80–17.23 · VW $15.51i | $73,884,975 | SEC |
| 2004 Q2 | 4,855,300 | 3.13 | Add 7.89% | 0.23 | $12.56–14.70 · VW $13.82i | $71,130,145 | SEC |
| 2004 Q1 | 4,500,424 | 1.43 | Add 16.87% | 0.21 | $12.52–14.83 · VW $13.50i | $59,698,124 | SEC |
| 2003 Q4 | 3,850,712 | 1.52 | Reduce 2.81% | 0.05 | $12.57–15.38 · VW $14.07i | $56,952,030 | SEC |
| 2003 Q3 | 3,961,900 | 1.66 | Reduce 9.19% | 0.30 | $13.21–14.99 · VW $14.28i | $53,386,603 | SEC |
| 2003 Q2 | 4,362,700 | 3.32 | Reduce 2.13% | 0.04 | $10.48–13.73 · VW $12.64i | $48,480,504 | SEC |
| 2003 Q1 | 4,457,700 | 1.71 | Add 3.80% | 0.06 | $8.35–10.54 · VW $9.79i | $40,765,667 | SEC |
| 2002 Q4 | 4,294,500 | 1.63 | Add 10.14% | 0.15 | $8.04–9.45 · VW $8.73i | $38,650,500 | SEC |
| 2002 Q3 | 3,899,300 | 1.57 | Add 10.73% | 0.15 | $7.48–9.44 · VW $8.76i | $33,465,742 | SEC |
| 2002 Q2 | 3,521,600 | 1.37 | Add 0.49% | <0.01 | $7.51–10.04 · VW $9.00i | $30,849,216 | SEC |
| 2002 Q1 | 3,504,400 | 3.07 | Add 20.84% | 0.53 | $9.07–11.25 · VW $10.07i | $35,227,981 | SEC |
| 2001 Q4 | 2,900,000 | 1.41 | Reduce 9.60% | 0.13 | $8.35–10.09 · VW $9.16i | $28,159,000 | SEC |
| 2001 Q3 | 3,208,000 | 1.32 | Reduce 0.25% | <0.01 | $6.73–9.23 · VW $8.36i | $23,113,640 | SEC |
| 2001 Q2 | 3,216,000 | 2.83 | Reduce 0.12% | <0.01 | $7.11–8.26 · VW $7.61i | $25,044,600 | SEC |
| 2001 Q1 | 3,220,000 | 1.31 | Add 0.16% | <0.01 | $6.11–7.95 · VW $7.11i | $21,485,450 | SEC |
| 2000 Q4 | 3,214,800 | 1.29 | Add 1.71% | 0.02 | $5.84–7.41 · VW $6.63i | $22,352,906 | SEC |
| 2000 Q3 | 3,160,800 | 1.13 | Add 4.37% | 0.05 | $4.94–6.30 · VW $5.82i | $17,384,400 | SEC |
| 2000 Q2 | 3,028,576 | 0.94 | Add 1.26% | 0.01 | $4.70–5.95 · VW $5.31i | $14,953,594 | SEC |
| 2000 Q1 | 2,990,976 | 2.23 | Add 1.52% | 0.03 | $5.34–6.23 · VW $5.77i | $16,870,974 | SEC |
| 1999 Q4 | 2,946,176 | 1.12 | Reduce 0.11% | <0.01 | $4.95–6.28 · VW $5.64i | $17,723,090 | SEC |
| 1999 Q3 | 2,949,376 | 1.08 | Buy | 1.08 | $4.81–6.00 · VW $5.48i | $17,097,164 | SEC |
Price snapshot:
Current price$89.28
Avg. buy price$318.09
+/- since buy-71.93%
52-week low$68.09
52-week high$112.42