Watts Water Technologies, Inc.
MX ˙ BMV ˙ US9427491025
SecurityMX:WTS / Watts Water Technologies, Inc.
InstitutionMirova US LLC
Latest Disclosed Ownership437,865 shares
Latest Disclosed Value $ 127,107,831
Mirova US LLC reports 4.90% decrease in ownership of WTS / Watts Water Technologies, Inc.

On May 11, 2026 - Mirova US LLC filed a 13F-HR form disclosing ownership of 437,865 shares of Watts Water Technologies, Inc. (MX:WTS) valued at $127,107,831 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 460,428 shares of Watts Water Technologies, Inc.. This represents a change in shares of -4.90% during the quarter.

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)
2026-05-11 2026-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 437,865 -22,563 -4.90 127,108 0.02 1.4424
2026-02-11 2025-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 460,428 -11,394 -2.41 127,087 -3.55 1.2759
2025-10-20 2025-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 471,822 -276,506 -36.95 131,770 -28.39 1.3307
2025-07-23 2025-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 748,328 19,344 2.65 184,006 23.78 1.9046
2025-05-15 2025-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 728,984 25,078 3.56 148,654 3.88 1.7655
2025-02-10 2024-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 703,906 -20,476 -2.83 143,104 -4.65 1.7164
2024-11-14 2024-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 724,382 8,708 1.22 150,085 14.36 1.7218
2024-07-31 2024-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 715,674 15,462 2.21 131,233 -11.82 1.6336
2024-05-09 2024-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 700,212 -12,575 -1.76 148,830 0.22 2.0008
2024-01-30 2023-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 712,787 -4,441 -0.62 148,502 19.81 2.2375
2023-11-13 2023-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 717,228 28,764 4.18 123,951 -2.01 2.1014
2023-07-24 2023-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 688,464 16,839 2.51 126,491 11.89 2.1056
2023-05-02 2023-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 671,625 7,979 1.20 113,048 16.49 2.0511
2023-02-09 2022-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 663,646 17,365 2.69 97,045 19.43 1.9496
2022-11-03 2022-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 646,281 -2,319 -0.36 81,256 1.99 1.8980
2022-07-28 2022-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 648,600 38,553 6.32 79,674 -6.44 1.7157
2022-05-06 2022-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 610,047 43,621 7.70 85,156 -22.57 1.6354
2022-02-14 2021-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 566,426 59,761 11.79 109,982 29.14 2.0662
2021-11-15 2021-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 506,665 52,935 11.67 85,165 28.64 1.9879
2021-08-16 2021-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 453,730 51,037 12.67 66,203 38.38 1.7758
2021-05-17 2021-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 402,693 62,742 18.46 47,843 15.64 1.6653
2021-02-16 2020-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 339,951 62,731 22.63 41,372 49.01 1.8033
2020-11-16 2020-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 277,220 72,774 35.60 27,764 67.66 1.5877
2020-08-14 2020-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 204,446 35,930 21.32 16,560 16.09 1.4435
2020-05-13 2020-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 168,516 29,390 21.12 14,265 2.79 1.8898
2020-02-14 2019-12-31 13F WATTS WATER TECHNOLOGIES Common Stock 942749102 139,126 139,126 13,878 1.8796
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.