William Blair & Company
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William Blair & Company’s Pentair PNR Stock Holding History

William Blair & Company’s Portfolio PNR Stock Details PNR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$259K Buy
3,379
+1,058
+46% +$83.7K ﹤0.01% 1479
2026
Q1 		$202K Sell
2,321
-577
-20% -$56.5K ﹤0.01% 1481
2025
Q4 		$302K Sell
2,898
-1,529
-35% -$163K ﹤0.01% 1309
2025
Q3 		$490K Buy
4,427
+1,416
+47% +$151K ﹤0.01% 1123
2025
Q2 		$309K Buy
3,011
+471
+19% +$44K ﹤0.01% 1250
2025
Q1 		$222K Sell
2,540
-290
-10% -$27.6K ﹤0.01% 1370
2024
Q4 		$285K Buy
+2,830
New +$290K ﹤0.01% 1305
2019
Q3 		– Sell
-5,882
Closed -$219K – 1740
2019
Q2 		$219K Sell
5,882
-1,750
-23% -$66.4K ﹤0.01% 1269
2019
Q1 		$340K Sell
7,632
-848
-10% -$35.3K ﹤0.01% 1101
2018
Q4 		$320K Sell
8,480
-1,830
-18% -$74K ﹤0.01% 1067
2018
Q3 		$447K Sell
10,310
-29
-0.3% -$1.26K ﹤0.01% 993
2018
Q2 		$435K Sell
10,339
-2,425
-19% -$109K ﹤0.01% 990
2018
Q1 		$584K Sell
12,764
-96,241
-88% -$4.58M ﹤0.01% 872
2017
Q4 		$5.17M Buy
+109,005
New +$5.1M 0.04% 351
2017
Q1 		– Sell
-5,771
Closed -$217K – 1497
2016
Q4 		$217K Sell
5,771
-956
-14% -$37.3K ﹤0.01% 1125
2016
Q3 		$290K Sell
6,727
-462
-6% -$19.5K ﹤0.01% 1027
2016
Q2 		$281K Buy
+7,189
New +$279K ﹤0.01% 1009
2016
Q1 		– Sell
-25,568
Closed -$850K – 1234
2015
Q4 		$850K Sell
25,568
-11,274
-31% -$412K 0.01% 666
2015
Q3 		$1.26M Sell
36,842
-9,782
-21% -$384K 0.01% 680
2015
Q2 		$2.15M Sell
46,624
-96,115
-67% -$4.07M ﹤0.01% 1325
2015
Q1 		$6.03M Sell
142,739
-7,403
-5% -$322K 0.01% 992
2014
Q4 		$6.7M Sell
150,142
-8,417
-5% -$370K 0.01% 970
2014
Q3 		$6.97M Sell
158,559
-158,148
-50% -$7.31M 0.01% 943
2014
Q2 		$15.3M Buy
+316,707
New +$16.1M 0.03% 679

Other funds holding PNR

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
Nordea Investment Management
Nordea Investment Management Stockholm, Sweden $123B AUM 38.85% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Amundi
Amundi Paris, France $416B AUM 44.19% 1-Year Est. Return

William Blair & Company's PNR Position: Q2 2026 in Review

William Blair & Company increased its Pentair (PNR) stake by 46% in Q2 2026, buying an estimated $83.7K and bringing the position to 3,379 shares worth $259K. The position accounts for ﹤0.01% of the portfolio, ranked #1479.

William Blair & Company first reported a position in PNR in Q2 2014 and has held it in 24 quarters since. The position peaked at $15.3M in Q2 2014. 724 funds tracked by Wall St. Rank hold PNR as of Q2 2026.

  • William Blair & Company held 3,379 shares of Pentair worth $259K as of Q2 2026.
  • William Blair & Company bought 1,058 Pentair shares in Q2 2026, an estimated $83.7K.
  • Pentair made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1479 holding.
  • William Blair & Company first reported a position in Pentair in Q2 2014 and has held it in 24 quarters since.
  • William Blair & Company's Pentair position peaked at $15.3M in Q2 2014.
  • 724 funds tracked by Wall St. Rank held Pentair as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.