Mueller Water Products, Inc.
US ˙ NYSE ˙ US6247581084

SecurityMWA / Mueller Water Products, Inc.
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership1,934,813 shares
Latest Disclosed Value $ 53,216,952
Janus Henderson Group Plc reports 58.60% increase in ownership of MWA / Mueller Water Products, Inc.

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 1,934,813 shares of Mueller Water Products, Inc. (US:MWA) valued at $53,188,009 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,219,900 shares of Mueller Water Products, Inc.. This represents a change in shares of 58.60% during the quarter. The current value of the position is $49,008,813 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)
2026-05-18 2026-03-31 13F/A-1 MUELLER WTR PRODS COM SER A 624758108 1,934,813 714,913 58.60 53,217 83.02 0.0090
2026-05-15 2026-03-31 13F MUELLER WTR PRODS COM SER A 624758108 1,934,813 714,913 53,217 0.0099
2026-02-17 2025-12-31 13F MUELLER WTR PRODS COM SER A 624758108 1,219,900 385,785 46.25 29,076 36.46 0.0130
2025-11-14 2025-09-30 13F MUELLER WTR PRODS COM SER A 624758108 834,115 188,648 29.23 21,307 37.23 0.0097
2025-08-14 2025-06-30 13F MUELLER WTR PRODS COM SER A 624758108 645,467 -1,391 -0.22 15,527 -5.89 0.0076
2025-05-15 2025-03-31 13F MUELLER WTR PRODS COM SER A 624758108 646,858 386,154 148.12 16,499 181.30 0.0090
2025-02-14 2024-12-31 13F MUELLER WTR PRODS COM SER A 624758108 260,704 190,878 273.36 5,865 287.38 0.0030
2024-11-14 2024-09-30 13F MUELLER WTR PRODS COM SER A 624758108 69,826 0 0.00 1,514 20.93 0.0008
2024-08-14 2024-06-30 13F MUELLER WTR PRODS COM SER A 624758108 69,826 -793 -1.12 1,252 10.31 0.0007
2024-05-15 2024-03-31 13F MUELLER WTR PRODS COM SER A 624758108 70,619 1 0.00 1,136 11.71 0.0006
2024-02-14 2023-12-31 13F MUELLER WTR PRODS COM SER A 624758108 70,618 -123 -0.17 1,017 13.27 0.0006
2023-11-14 2023-09-30 13F MUELLER WTR PRODS COM SER A 624758108 70,741 6 0.01 897 -21.80 0.0006
2023-08-14 2023-06-30 13F MUELLER WTR PRODS COM SER A 624758108 70,735 -83 -0.12 1,148 16.33 0.0007
2023-05-15 2023-03-31 13F MUELLER WTR PRODS COM SER A 624758108 70,818 37,555 112.90 986 175.42 0.0007
2023-02-14 2022-12-31 13F MUELLER WTR PRODS COM SER A 624758108 33,263 9,499 39.97 358 46.72 0.0003
2023-01-13 2022-09-30 13F/A-1 MUELLER WTR PRODS COM SER A 624758108 23,764 -8,342 -25.98 244 -35.28 0.0002
2022-11-14 2022-09-30 13F MUELLER WTR PRODS COM SER A 624758108 23,764 -8,342 244 0.0001
2022-08-15 2022-06-30 13F MUELLER WTR PRODS COM SER A 624758108 32,106 -46 -0.14 377 -9.37 0.0003
2022-05-16 2022-03-31 13F MUELLER WTR PRODS COM SER A 624758108 32,152 -6 -0.02 416 -10.15 0.0002
2022-02-14 2021-12-31 13F MUELLER WTR PRODS COM SER A 624758108 32,158 16,169 101.13 463 90.53 0.0002
2021-11-16 2021-09-30 13F MUELLER WTR PRODS COM SER A 624758108 15,989 15,989 243 0.0001
2013-11-12 2013-09-30 13F MUELLER WTR PRODS COM SER A 624758108 0 -539,031 -100.00 0 -100.00
2013-08-15 2013-06-30 13F MUELLER WTR PRODS COM SER A 624758108 539,031 539,031 3,849 0.0450
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.