Watts Water Technologies, Inc.
MX ˙ BMV ˙ US9427491025
SecurityMX:WTS / Watts Water Technologies, Inc.
InstitutionM&t Bank Corp
Latest Disclosed Ownership6,312 shares
Latest Disclosed Value $ 1,832,309
M&t Bank Corp reports 35.54% increase in ownership of WTS / Watts Water Technologies, Inc.

On May 12, 2026 - M&t Bank Corp filed a 13F-HR form disclosing ownership of 6,312 shares of Watts Water Technologies, Inc. (MX:WTS) valued at $1,832,309 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on January 30, 2026 disclosing 4,657 shares of Watts Water Technologies, Inc.. This represents a change in shares of 35.54% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-12 2026-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 6,312 1,655 35.54 1,832 42.57 0.0015
2026-01-30 2025-12-31 13F/A-1 WATTS WATER TECHNOLOGIES CL A 942749102 4,657 1,640 54.36 1,285 52.61 0.0041
2026-01-28 2025-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 81,743 78,726 7,560 0.0045
2025-11-14 2025-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 3,017 -47 -1.53 842 11.82 0.0028
2025-08-13 2025-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 3,064 653 27.08 754 53.36 0.0026
2025-04-30 2025-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 2,411 -155 -6.04 491 -5.76 0.0018
2025-02-06 2024-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 2,566 294 12.94 522 10.85 0.0017
2024-11-19 2024-09-30 13F/A-1 WATTS WATER TECHNOLOGIES CL A 942749102 2,272 74 3.37 471 16.63 0.0015
2024-11-15 2024-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 2,272 74 471 0.0003
2024-07-31 2024-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 2,198 -313 -12.47 403 -24.39 0.0014
2024-05-07 2024-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 2,511 479 23.57 534 26.00 0.0019
2024-02-06 2023-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 2,032 -280 -12.11 423 6.02 0.0016
2023-11-02 2023-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 2,312 -32 -1.37 400 -7.21 0.0016
2023-08-09 2023-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 2,344 24 1.03 431 10.26 0.0016
2023-05-11 2023-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 2,320 0 0.00 391 15.04 0.0015
2023-02-13 2022-12-31 13F/A-1 WATTS WATER TECHNOLOGIES CL A 942749102 2,320 2,320 339 0.0014
2023-02-13 2022-12-31 13F WATSCO COM 942749102 790 790 120 0.0005
2022-05-09 2022-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 0 -3,019 -100.00 0 -100.00
2022-02-07 2021-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 3,019 144 5.01 586 21.33 0.0025
2021-10-28 2021-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 2,875 -89 -3.00 483 11.55 0.0022
2021-08-13 2021-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 2,964 286 10.68 433 35.74 0.0019
2021-05-06 2021-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 2,678 -2,120 -44.19 319 -45.38 0.0014
2021-02-12 2020-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 4,798 612 14.62 584 39.05 0.0026
2020-11-06 2020-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 4,186 197 4.94 420 80.26 0.0021
2014-11-14 2014-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 3,989 3,939 7,878.00 233 7,666.67 0.0016
2014-05-14 2014-03-31 13F WATTS WATER TECHNOLOGIES INC C COMMON STOCK 942749102 50 50 3 0.0001
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.