William Frels - Mairs & Power
Period:    Q1 2026
Portfolio date:    31 Mar 2026
No. of stocks:    245
Portfolio value:    $9,786,094,433
Holdings Activity Buys Sells    History
Holding/activity history for  Pentair Inc (PNRG)
← All PNRG superinvestors
Period Shares % of Portfolio Activity % Change to Portfolio Price Value Filing
2012   Q4 0 0.00 Sell 100.00% 3.66 $22.00–28.00 · VW $25.72i SEC
2012   Q3 3,345,778 3.66 Add 0.26% <0.01 $25.77–28.25 · VW $27.22i $148,921,000 SEC
2012   Q2 3,336,977 3.33 Add 0.93% 0.03 $22.02–28.00 · VW $25.50i $127,739,000 SEC
2012   Q1 3,306,193 4.04 Reduce 0.98% 0.03 $21.43–28.55 · VW $24.05i $157,408,000 SEC
2011   Q4 3,339,078 3.20 Reduce 0.31% 0.01 $19.19–24.76 · VW $22.17i $111,158,000 SEC
2011   Q3 3,349,463 3.45 Add 0.72% 0.02 $15.26–21.72 · VW $19.01i $107,216,000 SEC
2011   Q2 3,325,436 1.82 Reduce 0.35% 0.01 $17.07–26.20 · VW $21.33i $134,215,000 SEC
2011   Q1 3,337,126 3.45 Reduce 0.12% <0.01 $24.53–30.00 · VW $26.69i $126,110,000 SEC
2010   Q4 3,341,071 3.52 Add 0.21% <0.01 $18.60–27.00 · VW $24.20i $121,982,000 SEC
2010   Q3 3,334,211 1.77 Add 1.51% 0.03 $17.68–22.14 · VW $20.17i $112,129,501,000 SEC
2010   Q2 3,284,586 3.63 Reduce 4.85% 0.09 $17.55–23.40 · VW $19.84i $105,763,655,000 SEC
2010   Q1 3,452,186 1.86 Reduce 0.53% <0.01 $15.98–31.00 · VW $22.69i $122,966,850,000 SEC
2009   Q4 3,470,426 1.78 Reduce 0.31% <0.01 $24.22–38.74 · VW $29.34i $112,094,746,000 SEC
2009   Q3 3,481,326 1.70 Add 0.20% <0.01 $24.60–36.57 · VW $31.96i $102,768,731,000 SEC
2009   Q2 3,474,376 1.69 Add 0.33% <0.01 $23.58–43.02 · VW $31.33i $89,013,502,000 SEC
2009   Q1 3,462,826 1.69 Reduce 0.30% <0.01 $24.46–53.22 · VW $38.56i $75,039,430,000 SEC
2008   Q4 3,473,176 1.56 Reduce 0.35% <0.01 $30.00–55.97 · VW $38.83i $82,210,065,000 SEC
2008   Q3 3,485,220 1.76 Reduce 0.15% <0.01 $44.43–82.38 · VW $60.34i $120,484,040,000 SEC
2008   Q2 3,490,500 1.81 Add 0.00% $50.68–81.99 · VW $69.78i $122,237,295,000 SEC
2008   Q1 3,490,453 1.54 Add 0.10% <0.01 $52.00–64.50 · VW $59.83i $111,345,437,000 SEC
2007   Q4 3,486,813 2.47 Add 0.61% 0.01 $52.08–56.25 · VW $54.71i $121,375,945 SEC
2007   Q3 3,465,833 1.38 Add 2.34% 0.03 $52.43–56.95 · VW $55.06i $114,996,324,000 SEC
2007   Q2 3,386,633 1.58 Add 2.57% 0.04 $53.05–59.00 · VW $56.28i $130,622,418 SEC
2007   Q1 3,301,873 1.31 Add 2.12% 0.03 $53.04–64.90 · VW $58.77i $102,886,349 SEC
2006   Q4 3,233,273 1.30 Add 0.89% 0.01 $50.10–70.00 · VW $58.20i $101,524,758 SEC
2006   Q3 3,204,870 2.30 Add 3.17% 0.07 $66.53–81.26 · VW $71.62i $83,935,556 SEC
2006   Q2 3,106,448 2.73 Add 8.30% 0.21 $59.09–84.00 · VW $71.97i $106,209,457 SEC
2006   Q1 2,868,248 1.60 Reduce 0.18% <0.01 $56.28–86.75 · VW $71.53i $116,881,106 SEC
2005   Q4 2,873,448 1.44 Add 10.79% 0.14 $39.41–62.81 · VW $54.04i $99,191,425 SEC
2005   Q3 2,593,598 2.96 Add 0.27% <0.01 $36.00–50.54 · VW $43.25i $94,666,327 SEC
2005   Q2 2,586,598 1.73 Add 0.69% 0.01 $21.32–52.49 · VW $41.10i $110,732,260 SEC
2005   Q1 2,568,898 1.67 Add 0.62% 0.01 $19.77–47.09 · VW $29.72i $100,187,022 SEC
2004   Q4 2,552,998 2.00 Reduce 0.63% 0.02 $19.50–22.99 · VW $21.10i $111,208,593 SEC
2004   Q3 2,569,098 3.84 Reduce 0.00% <0.01 $18.00–21.52 · VW $19.67i $89,687,211 SEC
2004   Q2 2,569,144 3.80 Add 99.41% 1.89 $18.00–21.35 · VW $19.28i $86,426,004 SEC
2004   Q1 1,288,372 1.82 Add 5.15% 0.09 $14.50–21.30 · VW $17.94i $76,013,948 SEC
2003   Q4 1,225,322 1.50 Add 10.40% 0.14 $11.39–16.00 · VW $13.96i $55,997,215 SEC
2003   Q3 1,109,922 1.38 Add 14.84% 0.18 $9.43–12.57 · VW $11.47i $44,252,590 SEC
2003   Q2 966,522 2.58 Add 5.81% 0.14 $9.40–10.56 · VW $9.94i $37,752,349 SEC
2003   Q1 913,422 1.35 Add 1.40% 0.02 $8.00–11.00 · VW $9.50i $32,289,468 SEC
2002   Q4 900,772 1.31 Add 24.96% 0.26 $8.00–10.00 · VW $8.95i $31,121,673 SEC
2002   Q3 720,822 1.26 Add 16.00% 0.17 $8.00–9.01 · VW $8.34i $26,792,954 SEC
2002   Q2 621,372 1.33 Reduce 0.56% 0.01 $8.00–8.74 · VW $8.25i $29,875,566 SEC
2002   Q1 624,872 2.45 Add 24.56% 0.48 $7.95–9.07 · VW $8.46i $28,100,494 SEC
2001   Q4 501,672 0.92 Add 34.22% 0.23 $7.90–8.30 · VW $8.05i $18,316,045 SEC
2001   Q3 373,772 0.66 Add 281.90% 0.48 $7.00–9.50 · VW $8.14i $11,500,964 SEC
2001   Q2 97,872 0.37 Reduce 0.33% <0.01 $8.00–9.16 · VW $8.55i $3,308,074 SEC
2001   Q1 98,200 0.15 Add 4.08% <0.01 $6.00–16.84 · VW $10.65i $2,502,136 SEC
2000   Q4 94,350 0.13 Add 0.80% <0.01 $5.63–7.94 · VW $6.52i $2,282,091 SEC
2000   Q3 93,600 0.16 Add 60.00% 0.06 $5.88–8.75 · VW $7.25i $2,503,800 SEC
2000   Q2 58,500 0.13 Add 19.63% 0.02 $4.63–6.00 · VW $5.50i $2,076,750 SEC
2000   Q1 48,900 0.24 Add 15.33% 0.03 $2.44–6.75 · VW $4.65i $1,812,356 SEC
1999   Q4 42,400 0.10 Add 10.42% <0.01 $4.75–5.00 · VW $4.83i $1,632,400 SEC
1999   Q3 38,400 0.10 Buy 0.10 $4.50–5.50 · VW $4.94i $1,540,800 SEC