Pentair plc
US ˙ NYSE ˙ IE00BLS09M33

SecurityPNR / Pentair plc
InstitutionAmalgamated Bank
Latest Disclosed Ownership30,148 shares
Latest Disclosed Value $ 2,626
Amalgamated Bank reports 1.64% decrease in ownership of PNR / Pentair plc

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 30,148 shares of Pentair plc (US:PNR) valued at $2,626,192 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 30,650 shares of Pentair plc. This represents a change in shares of -1.64% during the quarter. The current value of the position is $2,154,075 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)
2026-05-08 2026-03-31 13F PENTAIR COM G7S00T104 30,148 -502 -1.64 3 -33.33 0.0201
2026-02-05 2025-12-31 13F PENTAIR COM G7S00T104 30,650 -1,694 -5.24 3 0.00 0.0230
2025-10-29 2025-09-30 13F PENTAIR COM G7S00T104 32,344 -775 -2.34 4 0.00 0.0256
2025-08-04 2025-06-30 13F PENTAIR COM G7S00T104 33,119 -155 -0.47 3 50.00 0.0262
2025-04-25 2025-03-31 13F PENTAIR COM G7S00T104 33,274 463 1.41 3 -33.33 0.0249
2025-02-04 2024-12-31 13F PENTAIR COM G7S00T104 32,811 -775 -2.31 3 0.00 0.0271
2024-10-30 2024-09-30 13F PENTAIR COM G7S00T104 33,586 -136 -0.40 3 50.00 0.0271
2024-08-12 2024-06-30 13F PENTAIR COM G7S00T104 33,722 -1,334 -3.81 3 0.00 0.0220
2024-04-23 2024-03-31 13F PENTAIR COM G7S00T104 35,056 -23,619 -40.25 3 -50.00 0.0256
2024-02-06 2023-12-31 13F PENTAIR COM G7S00T104 58,675 2,187 3.87 4 33.33 0.0340
2023-11-08 2023-09-30 13F PENTAIR COM G7S00T104 56,488 5,193 10.12 4 0.00 0.0311
2023-08-11 2023-06-30 13F PENTAIR COM G7S00T104 51,295 -1,419 -2.69 3 50.00 0.0268
2023-05-02 2023-03-31 13F PENTAIR COM G7S00T104 52,714 -17,545 -24.97 3 -33.33 0.0248
2023-02-10 2022-12-31 13F PENTAIR COM G7S00T104 70,259 14,715 26.49 3 -99.87 0.0282
2022-11-09 2022-09-30 13F PENTAIR COM G7S00T104 55,544 -933 -1.65 2,257 -12.69 0.0218
2022-08-15 2022-06-30 13F PENTAIR COM G7S00T104 56,477 -235 -0.41 2,585 -15.91 0.0241
2022-08-25 2022-03-31 13F/A-1 PENTAIR COM G7S00T104 56,712 56,712 3,074 0.0239
2018-05-22 2018-03-31 13F PENTAIR COM G7S00T104 0 -20,854 -100.00 0 -100.00
2018-02-13 2017-12-31 13F PENTAIR COM G7S00T104 20,854 1,865 9.82 1,473 14.19 0.0399
2017-11-09 2017-09-30 13F PENTAIR COM G7S00T104 18,989 314 1.68 1,290 3.78 0.0402
2017-08-10 2017-06-30 13F PENTAIR COM G7S00T104 18,675 6,990 59.82 1,243 69.35 0.0407
2017-05-12 2017-03-31 13F PENTAIR COM G7S00T104 11,685 673 6.11 734 18.96 0.0365
2017-02-14 2016-12-31 13F PENTAIR COM G7S00T104 11,012 3,168 40.39 617 22.42 0.0279
2016-11-15 2016-09-30 13F/A-1 PENTAIR COM G7S00T104 7,844 -200 -2.49 504 -4.91 0.0292
2016-11-14 2016-09-30 13F PENTAIR COM G7S00T104 3,534 227
2016-08-16 2016-06-30 13F PENTAIR COM G7S00T104 8,044 1,600 24.83 530 51.43 0.0307
2016-05-11 2016-03-31 13F PENTAIR COM G7S00T104 6,444 1,721 36.44 350 49.57 0.0341
2016-02-10 2015-12-31 13F PENTAIR COM G7S00T104 4,723 -1,534 -24.52 234 -26.65 0.0289
2015-11-04 2015-09-30 13F PENTAIR COM G7S00T104 6,257 182 3.00 319 -23.68 0.0335
2015-07-10 2015-06-30 13F PENTAIR COM G7S00T104 6,075 219 3.74 418 13.59 0.0411
2015-04-22 2015-03-31 13F PENTAIR COM G7S00T104 5,856 5,856 0.00 368 0.0449
2015-01-29 2014-12-31 13F PENTAIR COM G7S00T104 0 -5,389 -100.00 0 -100.00
2014-11-14 2014-09-30 13F PENTAIR COM G7S00T104 5,389 44 0.82 353 -8.31 0.0525
2014-08-11 2014-06-30 13F PENTAIR COM G7S00T104 5,345 386 7.78 385 -2.04 0.0581
2014-05-12 2014-03-31 13F PENTAIR INC COM COM H6169Q108 4,959 -96 -1.90 393 0.00 0.0677
2014-02-13 2013-12-31 13F PENTAIR INC COM COM H6169Q108 5,055 5,055 1.12 393 48.86 0.0668
2013-11-14 2013-09-30 13F PENTAIR INC COM COM H6169Q108 0 0 0 0.0000
2013-08-15 2013-06-30 13F PENTAIR INC COM COM H6169Q108 0 -4,999 -100.00 0 -100.00
2014-02-13 2013-03-31 13F PENTAIR INC COM COM H6169Q108 4,999 293 6.23 264 14.29 0.0749
2014-02-11 2012-12-31 13F PENTAIR INC COM COM H6169Q108 4,706 4,706 231 0.0962
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.