Mueller Water Products, Inc.
US ˙ NYSE ˙ US6247581084

SecurityMWA / Mueller Water Products, Inc.
InstitutionFirst Manhattan Co
Latest Disclosed Ownership71,296 shares
Latest Disclosed Value $ 1,959,927
First Manhattan Co reports 2.56% decrease in ownership of MWA / Mueller Water Products, Inc.

On May 15, 2026 - First Manhattan Co filed a 13F-HR form disclosing ownership of 71,296 shares of Mueller Water Products, Inc. (US:MWA) valued at $1,959,927 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 73,167 shares of Mueller Water Products, Inc.. This represents a change in shares of -2.56% during the quarter. The current value of the position is $1,795,233 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.

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)
2026-05-15 2026-03-31 13F MUELLER WTR PRODS COM SER A 624758108 71,296 -1,871 -2.56 1,960 12.46 0.0054
2026-02-17 2025-12-31 13F MUELLER WTR PRODS COM SER A 624758108 73,167 0 0.00 1,743 -6.70 0.0046
2025-11-14 2025-09-30 13F MUELLER WTR PRODS COM SER A 624758108 73,167 -4,000 -5.18 1,867 0.65 0.0049
2025-08-14 2025-06-30 13F MUELLER WTR PRODS COM SER A 624758108 77,167 -5,400 -6.54 1,855 -11.58 0.0052
2025-05-15 2025-03-31 13F MUELLER WTR PRODS COM SER A 624758108 82,567 -3,483 -4.05 2,099 8.37 0.0061
2025-02-14 2024-12-31 13F MUELLER WTR PRODS COM SER A 624758108 86,050 -1,000 -1.15 1,936 2.54 0.0057
2024-11-14 2024-09-30 13F MUELLER WTR PRODS COM SER A 624758108 87,050 -3,700 -4.08 1,889 16.11 0.0056
2024-08-15 2024-06-30 13F/A-1 MUELLER WTR PRODS COM SER A 624758108 90,750 -6,600 -6.78 1,626 3.83 0.0052
2024-08-14 2024-06-30 13F MUELLER WTR PRODS COM SER A 624758108 90,750 -6,600 1,626 0.0052
2024-05-15 2024-03-31 13F MUELLER WTR PRODS COM SER A 624758108 97,350 -9,410 -8.81 1,566 1.89 0.0051
2024-02-13 2023-12-31 13F MUELLER WTR PRODS COM SER A 624758108 106,760 -11,200 -9.49 1,537 2.81 0.0053
2023-11-14 2023-09-30 13F MUELLER WTR PRODS COM SER A 624758108 117,960 -11,335 -8.77 1,496 -28.74 0.0055
2023-08-14 2023-06-30 13F MUELLER WTR PRODS COM SER A 624758108 129,295 -42,130 -24.58 2,098 -12.18 0.0077
2023-05-15 2023-03-31 13F MUELLER WTR PRODS COM SER A 624758108 171,425 -11,480 -6.28 2,390 21.39 0.0092
2023-02-14 2022-12-31 13F MUELLER WTR PRODS COM SER A 624758108 182,905 -6,790 -3.58 1,968 1.03 0.0072
2022-11-14 2022-09-30 13F MUELLER WTR PRODS COM SER A 624758108 189,695 -9,200 -4.63 1,948 -16.50 0.0082
2022-08-15 2022-06-30 13F MUELLER WTR PRODS COM SER A 624758108 198,895 -200 -0.10 2,333 -9.29 0.0094
2022-05-16 2022-03-31 13F MUELLER WTR PRODS COM SER A 624758108 199,095 -22,100 -9.99 2,572 -19.25 0.0084
2022-02-14 2021-12-31 13F MUELLER WTR PRODS COM SER A 624758108 221,195 -2,915 -1.30 3,185 -6.60 0.0105
2021-11-15 2021-09-30 13F MUELLER WTR PRODS COM SER A 624758108 224,110 -725 -0.32 3,410 5.18 0.0126
2021-08-16 2021-06-30 13F MUELLER WTR PRODS COM SER A 624758108 224,835 -8,100 -3.48 3,242 0.22 0.0118
2021-05-14 2021-03-31 13F MUELLER WTR PRODS COM SER A 624758108 232,935 0 0.00 3,235 12.21 0.0139
2021-02-16 2020-12-31 13F MUELLER WTR PRODS COM SER A 624758108 232,935 -14,345 -5.80 2,883 12.22 0.0138
2020-11-12 2020-09-30 13F MUELLER WTR PRODS COMMON 624758108 247,280 0 0.00 2,569 10.21 0.0132
2020-08-14 2020-06-30 13F MUELLER WTR PRODS COMMON 624758108 247,280 -6,434 -2.54 2,331 14.71 0.0135
2020-05-06 2020-03-31 13F MUELLER WTR PRODS COMMON 624758108 253,714 8 0.00 2,032 -33.14 0.0132
2020-02-13 2019-12-31 13F MUELLER WTR PRODS COMMON 624758108 253,706 -6,991 -2.68 3,039 3.72 0.0152
2019-11-13 2019-09-30 13F MUELLER WTR PRODS COMMON 624758108 260,697 -11,991 -4.40 2,930 9.45 0.0161
2019-08-16 2019-06-30 13F MUELLER WTR PRODS COMMON 624758108 272,688 -7,241 -2.59 2,677 -4.73 0.0149
2019-04-12 2019-03-31 13F MUELLER WTR PRODS COMMON 624758108 279,929 -18,491 -6.20 2,810 3.50 0.0162
2019-01-30 2018-12-31 13F MUELLER WTR PRODS COMMON 624758108 298,420 -3,392 -1.12 2,715 -21.83 0.0169
2018-10-15 2018-09-30 13F MUELLER WTR PRODS COMMON 624758108 301,812 -7,992 -2.58 3,473 -4.33 0.0185
2018-08-01 2018-06-30 13F MUELLER WTR PRODS COMMON 624758108 309,804 -9,360 -2.93 3,630 4.64 0.0209
2018-04-20 2018-03-31 13F MUELLER WTR PRODS COMMON 624758108 319,164 -9,892 -3.01 3,469 -15.86 0.0197
2018-01-22 2017-12-31 13F MUELLER WTR PRODS COMMON 624758108 329,056 -6,994 -2.08 4,123 -4.14 0.0226
2017-10-25 2017-09-30 13F MUELLER WTR PRODS COMMON 624758108 336,050 -9,254 -2.68 4,301 6.65 0.0246
2017-08-10 2017-06-30 13F/A-2 MUELLER WTR PRODS COMMON 624758108 345,304 -594 -0.17 4,033 -1.35 0.0235
2017-08-01 2017-06-30 13F/A-1 MUELLER WTR PRODS COMMON 624758108 345,304 0 4,033 0.0235
2017-07-28 2017-06-30 13F MUELLER WTR PRODS COMMON 624758108 345,304 -594 4,033
2017-04-25 2017-03-31 13F/A-1 MUELLER WTR PRODS COMMON 624758108 345,898 -7,554 -2.14 4,088 -13.10 0.0243
2017-04-24 2017-03-31 13F MUELLER WTR PRODS COMMON 624758108 369,848 4,641
2017-01-25 2016-12-31 13F MUELLER WTR PRODS COMMON 624758108 353,452 -16,396 -4.43 4,704 1.36 0.0286
2016-10-20 2016-09-30 13F MUELLER WTR PRODS COMMON 624758108 369,848 804 0.22 4,641 10.13 0.0283
2016-07-14 2016-06-30 13F MUELLER WTR PRODS COMMON 624758108 369,044 -11,745 -3.08 4,214 12.01 0.0259
2016-04-22 2016-03-31 13F MUELLER WTR PRODS COMMON 624758108 380,789 -3,294 -0.86 3,762 13.90 0.0231
2016-01-20 2015-12-31 13F MUELLER WTR PRODS COMMON 624758108 384,083 -8,644 -2.20 3,303 9.81 0.0203
2015-10-26 2015-09-30 13F MUELLER WTR PRODS COMMON 624758108 392,727 -995 -0.25 3,008 -16.02 0.0193
2015-07-17 2015-06-30 13F MUELLER WTR PRODS COMMON 624758108 393,722 -7,295 -1.82 3,582 -9.32 0.0211
2015-04-30 2015-03-31 13F MUELLER WTR PRODS COMMON 624758108 401,017 -14,250 -3.43 3,950 -7.10 0.0228
2015-01-20 2014-12-31 13F MUELLER WTR PRODS COMMON 624758108 415,267 -2,000 -0.48 4,252 23.10 0.0241
2014-10-23 2014-09-30 13F MUELLER WTR PRODS COMMON 624758108 417,267 4,000 0.97 3,454 -3.25 0.0201
2014-08-14 2014-06-30 13F/A-1 MUELLER WTR PRODS COMMON 624758108 413,267 4,000 0.98 3,570 -8.18 0.0226
2014-05-16 2014-03-31 13F MUELLER WTR PRODS COMMON 624758108 409,267 -18,400 -4.30 3,888 -2.97 0.0256
2014-02-04 2013-12-31 13F MUELLER WTR PRODS COMMON 624758108 427,667 -22,700 -5.04 4,007 11.37 0.0265
2013-10-29 2013-09-30 13F MUELLER WTR PRODS COMMON 624758108 450,367 -6,500 -1.42 3,598 8.05 0.0251
2013-08-13 2013-06-30 13F MUELLER WTR PRODS COMMON 624758108 456,867 456,867 3,330 0.0229
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.