Watts Water Technologies, Inc.
US ˙ NYSE ˙ US9427491025

SecurityWTS / Watts Water Technologies, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership52,917 shares
Latest Disclosed Value $ 14,607,233
Sei Investments Co ownership in WTS / Watts Water Technologies, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 52,917 shares of Watts Water Technologies, Inc. (US:WTS) valued at $14,606,150 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 53,674 shares of Watts Water Technologies, Inc.. This represents a change in shares of -1.41% during the quarter. The current value of the position is $16,650,334 USD.

Sei Investments Co has a history of taking positions in derivatives of the underlying security (WTS) in the form of stock options.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

WTS / Watts Water Technologies, Inc. Historical Put/Call Ratio
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)
2026-02-13 2025-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 52,917 -757 -1.41 14,607 -2.56 0.0144
2025-11-13 2025-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 53,674 11,363 26.86 14,991 44.08 0.0161
2025-08-14 2025-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 42,311 11,972 39.46 10,404 68.19 0.0121
2025-05-14 2025-03-31 13F/A-1 WATTS WATER TECHNOLOGIES CL A 942749102 30,339 -3,593 -10.59 6,187 -10.32 0.0080
2025-05-13 2025-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 35,139 1,207 7,145 0.0078
2025-02-11 2024-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 33,932 3,159 10.27 6,898 8.20 0.0089
2024-11-12 2024-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 30,773 -1,718 -5.29 6,376 7.02 0.0083
2024-08-13 2024-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 32,491 -3,427 -9.54 5,958 -21.97 0.0084
2024-05-07 2024-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 35,918 6,255 21.09 7,634 23.55 0.0112
2024-02-14 2023-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 29,663 15,041 102.87 6,180 144.62 0.0099
2023-11-14 2023-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 14,622 235 1.63 2,527 -4.43 0.0045
2023-08-11 2023-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 14,387 23 0.16 2,643 9.35 0.0046
2023-05-12 2023-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 14,364 -703 -4.67 2,418 9.71 0.0045
2023-02-10 2022-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 15,067 -1,570 -9.44 2,203 5.36 0.0049
2022-11-14 2022-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 16,637 -31 -0.19 2,091 2.15 0.0047
2022-08-15 2022-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 16,668 0 0.00 2,047 -11.99 0.0044
2022-05-13 2022-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 16,668 -13,421 -44.60 2,326 -60.18 0.0047
2022-02-14 2021-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 30,089 -365 -1.20 5,842 14.12 0.0110
2021-11-12 2021-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 30,454 6,895 29.27 5,119 48.94 0.0107
2021-08-06 2021-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 23,559 10 0.04 3,437 22.84 0.0076
2021-05-12 2021-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 23,549 0 0.00 2,798 -2.37 0.0070
2021-02-08 2020-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 23,549 -218 -0.92 2,866 20.27 0.0074
2020-12-04 2020-09-30 13F/A-1 WATTS WATER TECHNOLOGIES CL A 942749102 23,767 16,119 210.76 2,383 272.34 0.0069
2020-11-06 2020-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 23,939 16,291 2,400 5,778.6664
2020-08-17 2020-06-30 13F/A-1 WATTS WATER TECHNOLOGIES CL A 942749102 7,648 -14,095 -64.83 640 -66.51 0.0020
2020-08-11 2020-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 7,648 -14,095 640 1,736.0341
2020-05-14 2020-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 21,743 11,719 116.91 1,911 81.14 0.0070
2020-02-06 2019-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 10,024 -228 -2.22 1,055 3.03 0.0031
2019-11-12 2019-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 10,252 -187 -1.79 1,024 -0.87 0.0026
2019-08-14 2019-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 10,439 -171 -1.61 1,033 16.33 0.0034
2019-05-15 2019-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 10,610 6,005 130.40 888 165.07 0.0030
2019-02-13 2018-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 4,605 716 18.41 335 -10.90 0.0012
2018-11-08 2018-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 3,889 -14,189 -78.49 376 -73.48 0.0014
2018-08-03 2018-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 18,078 6,229 52.57 1,418 53.96 0.0048
2018-05-11 2018-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 11,849 1,856 18.57 921 21.34 0.0035
2018-02-08 2017-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 9,993 2,658 36.24 759 49.70 0.0026
2017-11-06 2017-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 7,335 1,884 34.56 507 46.96 0.0018
2017-07-31 2017-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 5,451 1,875 52.43 345 54.71 0.0014
2017-05-05 2017-03-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 3,576 -5 -0.14 223 -4.70 0.0010
2017-02-02 2016-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 3,581 964 36.84 234 37.65 0.0011
2016-11-04 2016-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 2,617 1,216 86.80 170 107.32 0.0009
2016-08-11 2016-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 1,401 823 142.39 82 156.25 0.0005
2016-05-10 2016-03-31 13F/A-1 WATTS WATER TECHNOLOGIES CL A 942749102 578 -5,673 -90.75 32 -89.68 0.0002
2016-02-03 2015-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 6,251 -70,725 -91.88 310 -92.38 0.0019
2015-11-02 2015-09-30 13F/A-1 WATTS WATER TECHNOLOGIES CL A 942749102 76,976 -12 -0.02 4,066 1.85 0.0373
2015-10-30 2015-09-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 76,976 4,067
2015-08-07 2015-06-30 13F/A-1 WATTS WATER TECHNOLOGIES CL A 942749102 76,988 -32 -0.04 3,992 -5.83 0.0361
2015-08-04 2015-06-30 13F WATTS WATER TECHNOLOGIES CL A 942749102 76,988 -32 3,992 0.0361
2015-05-14 2015-03-31 13F/A-1 WATTS WATER TECHNOLOGIES CL A 942749102 77,020 -102 -0.13 4,239 -13.33 0.0368
2015-05-01 2015-03-31 13F WATERSTONE FINL INC MD PUT 942749102 77,020 77,020 4,239 0.0368
2015-02-10 2014-12-31 13F WATTS WATER TECHNOLOGIES CL A 942749102 77,122 77,122 4,891 0.0432
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2015-05-01 2015-03-31 13F WATERSTONE FINL INC MD PUT 77,020 4,239 n/a n/a n/a
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.