Mueller Water Products, Inc.
US ˙ NYSE ˙ US6247581084

SecurityMWA / Mueller Water Products, Inc.
InstitutionCitadel Advisors Llc
ManagerKen Griffin
Latest Disclosed Ownership111,916 shares
Latest Disclosed Value $ 3,076,571
Citadel Advisors Llc ownership in MWA / Mueller Water Products, Inc.

On May 15, 2026 - Citadel Advisors Llc filed a 13F-HR form disclosing ownership of 111,916 shares of Mueller Water Products, Inc. (US:MWA) valued at $3,076,571 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 497,535 shares of Mueller Water Products, Inc.. This represents a change in shares of -77.51% during the quarter. The current value of the position is $2,834,832 USD.

Citadel Advisors Llc has a history of taking positions in derivatives of the underlying security (MWA) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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
(Premium Subscription Required)

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.

MWA / Mueller Water Products, 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)
2026-05-15 2026-03-31 13F MUELLER WTR PRODS COM SER A 624758108 111,916 -385,619 -77.51 3,077 -74.04 0.0004
2026-02-17 2025-12-31 13F MUELLER WTR PRODS COM SER A 624758108 497,535 -307,605 -38.21 11,851 -42.32 0.0016
2025-11-14 2025-09-30 13F MUELLER WTR PRODS COM SER A 624758108 805,140 805,140 20,547 0.0031
2025-05-15 2025-03-31 13F MUELLER WTR PRODS COM SER A 624758108 0 -288,130 -100.00 0 -100.00
2025-02-14 2024-12-31 13F MUELLER WTR PRODS COM SER A 624758108 288,130 -60,275 -17.30 6,483 -14.26 0.0011
2024-11-14 2024-09-30 13F MUELLER WTR PRODS COM SER A 624758108 348,405 -294,981 -45.85 7,560 -34.43 0.0015
2024-08-14 2024-06-30 13F MUELLER WTR PRODS COM SER A 624758108 643,386 428,706 199.70 11,529 233.79 0.0023
2024-05-15 2024-03-31 13F MUELLER WTR PRODS COM SER A 624758108 214,680 214,680 3,454 0.0007
2024-02-14 2023-12-31 13F MUELLER WTR PRODS COM SER A 624758108 0 -47,524 -100.00 0 -100.00
2023-11-14 2023-09-30 13F MUELLER WTR PRODS COM SER A 624758108 47,524 14,355 43.28 603 11.90 0.0001
2023-08-14 2023-06-30 13F MUELLER WTR PRODS COM SER A 624758108 33,169 -38,235 -53.55 538 -45.93 0.0001
2023-05-15 2023-03-31 13F MUELLER WTR PRODS COM SER A 624758108 71,404 -95,526 -57.23 995 -44.60 0.0002
2023-02-14 2022-12-31 13F MUELLER WTR PRODS COM SER A 624758108 166,930 -78,851 -32.08 1,796 -28.84 0.0004
2022-11-14 2022-09-30 13F MUELLER WTR PRODS COM SER A 624758108 245,781 219,854 847.97 2,524 730.26 0.0006
2022-08-15 2022-06-30 13F MUELLER WTR PRODS COM SER A 624758108 25,927 -34,072 -56.79 304 -60.77 0.0001
2022-05-16 2022-03-31 13F MUELLER WTR PRODS COM SER A 624758108 59,999 -45,173 -42.95 775 -48.81 0.0002
2022-02-14 2021-12-31 13F MUELLER WTR PRODS COM SER A 624758108 105,172 -68,539 -39.46 1,514 -42.74 0.0003
2021-11-15 2021-09-30 13F MUELLER WTR PRODS Cmn 624758108 173,711 135,492 354.51 2,644 379.85 0.0005
2021-08-16 2021-06-30 13F MUELLER WTR PRODS COM SER A 624758108 38,219 -250,566 -86.77 551 -86.26 0.0001
2021-05-21 2021-03-31 13F/A-1 MUELLER WTR PRODS COM SER A 624758108 288,785 99,106 52.25 4,011 70.83 0.0010
2021-05-17 2021-03-31 13F MUELLER WTR PRODS COM SER A 624758108 288,785 99,106 4,011 0.0010
2021-02-16 2020-12-31 13F MUELLER WTR PRODS COM SER A 624758108 189,679 -60,598 -24.21 2,348 -9.69 0.0006
2020-11-16 2020-09-30 13F MUELLER WTR PRODS COM SER A 624758108 250,277 128,624 105.73 2,600 126.68 0.0007
2020-08-14 2020-06-30 13F MUELLER WTR PRODS Cmn 624758108 121,653 -341,581 -73.74 1,147 -69.09 0.0004
2020-05-15 2020-03-31 13F MUELLER WTR PRODS Cmn 624758108 463,234 -57,768 -11.09 3,711 -40.55 0.0017
2020-02-14 2019-12-31 13F MUELLER WTR PRODS Cmn 624758108 521,002 -147,934 -22.11 6,242 -16.98 0.0027
2019-11-14 2019-09-30 13F MUELLER WTR PRODS Cmn 624758108 668,936 383,244 134.15 7,519 167.96 0.0035
2019-08-14 2019-06-30 13F MUELLER WTR PRODS Cmn 624758108 285,692 -36,177 -11.24 2,806 -13.18 0.0013
2019-05-15 2019-03-31 13F MUELLER WTR PRODS Cmn 624758108 321,869 78,998 32.53 3,232 46.24 0.0016
2019-02-14 2018-12-31 13F MUELLER WTR PRODS Cmn 624758108 242,871 130,174 115.51 2,210 70.39 0.0012
2018-11-13 2018-09-30 13F MUELLER WTR PRODS Cmn 624758108 112,697 -186,663 -62.35 1,297 -63.04 0.0006
2018-08-14 2018-06-30 13F/A-1 MUELLER WTR PRODS Cmn 624758108 299,360 -120,562 -28.71 3,509 -23.12 0.0017
2018-08-10 2018-06-30 13F MUELLER WTR PRODS Cmn 624758108 299,360 -120,562 3,509
2018-05-14 2018-03-31 13F/A-1 MUELLER WTR PRODS Cmn 624758108 419,922 109,264 35.17 4,564 17.24 0.0025
2018-05-11 2018-03-31 13F MUELLER WTR PRODS Cmn 624758108 419,922 109,264 4,564
2018-02-09 2017-12-31 13F MUELLER WTR PRODS Cmn 624758108 310,658 47,918 18.24 3,893 15.76 0.0024
2017-11-09 2017-09-30 13F MUELLER WTR PRODS Cmn 624758108 262,740 242,047 1,169.70 3,363 1,289.67 0.0026
2017-08-11 2017-06-30 13F MUELLER WTR PRODS Cmn 624758108 20,693 -34,585 -62.57 242 -62.94 0.0002
2017-05-12 2017-03-31 13F MUELLER WTR PRODS Cmn 624758108 55,278 3,492 6.74 653 -5.22 0.0006
2017-02-10 2016-12-31 13F MUELLER WTR PRODS Cmn 624758108 51,786 -102,235 -66.38 689 -64.36 0.0007
2017-01-31 2016-09-30 13F/A-1 MUELLER WTR PRODS Cmn 624758108 154,021 -131,300 -46.02 1,933 -40.67 0.0019
2016-11-10 2016-09-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn 624758108 154,021 1,933
2017-01-31 2016-06-30 13F/A-1 MUELLER WTR PRODS Cmn 624758108 285,321 -107,042 -27.28 3,258 -15.97 0.0036
2016-08-12 2016-06-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn 624758108 285,321 3,258
2017-01-31 2016-03-31 13F/A-1 MUELLER WTR PRODS Cmn 624758108 392,363 358,675 1,064.70 3,877 1,236.90 0.0049
2016-05-13 2016-03-31 13F MUELLER WATER PRODUCTS INC CMN STK Cmn 624758108 392,363 3,877
2017-01-31 2015-12-31 13F/A-1 MUELLER WTR PRODS Cmn 624758108 33,688 33,688 -91.41 290 -92.52 0.0003
2016-02-12 2015-12-31 13F MUELLER WATER PRODUCTS INC CMN STK Cmn 624758108 33,688 290
2015-11-16 2015-09-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn 624758108 0 -9,685 -100.00 0 -100.00
2015-08-14 2015-06-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn 624758108 9,685 -25,237 -72.27 88 -74.42 0.0001
2015-05-15 2015-03-31 13F MUELLER WATER PRODUCTS INC CMN STK Cmn 624758108 34,922 -65,123 -65.09 344 -66.44 0.0004
2015-02-17 2014-12-31 13F MUELLER WATER PRODUCTS INC CMN STK Cmn 624758108 100,045 2,951 3.04 1,025 27.49 0.0012
2014-11-14 2014-09-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn 624758108 97,094 97,094 -2.95 804 -21.56 0.0010
2014-08-14 2014-06-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn 624758108 0 -50,027 -100.00 0 -100.00
2014-05-15 2014-03-31 13F MUELLER WATER PRODUCTS INC CMN STK Cmn 624758108 50,027 14,383 40.35 476 42.51 0.0007
2014-02-14 2013-12-31 13F MUELLER WATER PRODUCTS INC CMN STK Cmn 624758108 35,644 -10,040 -21.98 334 -8.49 0.0004
2013-11-14 2013-09-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn 624758108 45,684 -24,341 -34.76 365 -24.59 0.0006
2013-08-14 2013-06-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn 624758108 70,025 70,025 484 0.0008
Disclosed Call 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
(%)
2025-08-14 2025-06-30 13F MUELLER WTR PRODS COM SER A Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-05-15 2025-03-31 13F MUELLER WTR PRODS COM SER A Call 6,600 73.68 168 96.47 n/a n/a n/a
2025-02-14 2024-12-31 13F MUELLER WTR PRODS COM SER A Call 3,800 -5.00 86 -1.16 n/a n/a n/a
2024-11-14 2024-09-30 13F MUELLER WTR PRODS COM SER A Call 4,000 2.56 87 24.64 n/a n/a n/a
2024-08-14 2024-06-30 13F MUELLER WTR PRODS COM SER A Call 3,900 -60.61 70 -56.60 n/a n/a n/a
2024-05-15 2024-03-31 13F MUELLER WTR PRODS COM SER A Call 9,900 1,314.29 159 1,490.00 n/a n/a n/a
2024-02-14 2023-12-31 13F MUELLER WTR PRODS COM SER A Call 700 -91.25 10 -90.10 n/a n/a n/a
2023-11-14 2023-09-30 13F MUELLER WTR PRODS COM SER A Call 8,000 3,900.00 101 3,266.67 n/a n/a n/a
2023-08-14 2023-06-30 13F MUELLER WTR PRODS COM SER A Call 200 -96.92 3 -96.67 n/a n/a n/a
2023-05-15 2023-03-31 13F MUELLER WTR PRODS COM SER A Call 6,500 364.29 91 500.00 n/a n/a n/a
2023-02-14 2022-12-31 13F MUELLER WTR PRODS COM SER A Call 1,400 15 n/a n/a n/a
2022-05-16 2022-03-31 13F MUELLER WTR PRODS COM SER A Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-02-14 2021-12-31 13F MUELLER WTR PRODS COM SER A Call 20,700 3.50 298 -1.97 n/a n/a n/a
2021-11-15 2021-09-30 13F MUELLER WTR PRODS Cmn Call 20,000 -4.76 304 0.33 n/a n/a n/a
2021-08-16 2021-06-30 13F MUELLER WTR PRODS COM SER A Call 21,000 303 n/a n/a n/a
2021-05-21 2021-03-31 13F/A MUELLER WTR PRODS COM SER A Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-16 2020-12-31 13F MUELLER WTR PRODS COM SER A Call 10,500 -41.34 130 -30.11 n/a n/a n/a
2020-11-16 2020-09-30 13F MUELLER WTR PRODS COM SER A Call 17,900 -47.51 186 -42.24 n/a n/a n/a
2020-08-14 2020-06-30 13F MUELLER WTR PRODS Cmn Call 34,100 90.50 322 73.12 n/a n/a n/a
2019-08-14 2019-06-30 13F MUELLER WTR PRODS Cmn Call 0 -100.00 0 -100.00 n/a n/a n/a
2019-05-15 2019-03-31 13F MUELLER WTR PRODS Cmn Call 11,900 119 n/a n/a n/a
2017-02-10 2016-12-31 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Call 0 -100.00 0 -100.00 n/a n/a n/a
2017-01-31 2016-09-30 13F/A MUELLER WTR PRODS Cmn Call 11,300 -17.52 142 -8.97 n/a n/a n/a
2016-11-10 2016-09-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Call 11,300 142 n/a n/a n/a
2017-01-31 2016-06-30 13F/A MUELLER WTR PRODS Cmn Call 13,700 21.24 156 9.86 n/a n/a n/a
2016-08-12 2016-06-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Call 13,700 156 n/a n/a n/a
2016-05-13 2016-03-31 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Call 0 -100.00 0 -100.00 n/a n/a n/a
2017-01-31 2015-12-31 13F/A MUELLER WTR PRODS Cmn Call 7,400 64 n/a n/a n/a
2016-02-12 2015-12-31 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Call 7,400 64 n/a n/a n/a
2015-11-16 2015-09-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Call 0 -100.00 0 -100.00 n/a n/a n/a
2015-08-14 2015-06-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Call 3,700 -37.29 34 -41.38 n/a n/a n/a
2015-05-15 2015-03-31 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Call 5,900 5,800.00 58 5,700.00 n/a n/a n/a
2015-02-17 2014-12-31 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Call 100 -98.48 1 -98.18 n/a n/a n/a
2014-11-14 2014-09-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Call 6,600 -58.75 55 -60.14 n/a n/a n/a
2014-08-14 2014-06-30 13F MUELLER WATER PRODUCTS Cmn Call 16,000 400.00 138 360.00 n/a n/a n/a
2014-05-15 2014-03-31 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Call 3,200 -64.44 30 -64.29 n/a n/a n/a
2014-02-14 2013-12-31 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Call 9,000 18.42 84 37.70 n/a n/a n/a
2013-11-14 2013-09-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Call 7,600 1,166.67 61 1,425.00 n/a n/a n/a
2013-08-14 2013-06-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Call 600 4 n/a n/a n/a
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
(%)
2026-02-17 2025-12-31 13F MUELLER WTR PRODS COM SER A Put 0 -100.00 0 n/a n/a n/a
2025-11-14 2025-09-30 13F MUELLER WTR PRODS COM SER A Put 73,500 690.32 1,876 740.81 n/a n/a n/a
2025-08-14 2025-06-30 13F MUELLER WTR PRODS COM SER A Put 9,300 72.22 224 62.77 n/a n/a n/a
2025-05-15 2025-03-31 13F MUELLER WTR PRODS COM SER A Put 5,400 315.38 137 372.41 n/a n/a n/a
2025-02-14 2024-12-31 13F MUELLER WTR PRODS COM SER A Put 1,300 85.71 29 93.33 n/a n/a n/a
2024-11-14 2024-09-30 13F MUELLER WTR PRODS COM SER A Put 700 -30.00 15 -11.76 n/a n/a n/a
2024-08-14 2024-06-30 13F MUELLER WTR PRODS COM SER A Put 1,000 -90.48 18 -89.88 n/a n/a n/a
2024-05-15 2024-03-31 13F MUELLER WTR PRODS COM SER A Put 10,500 0.96 169 12.75 n/a n/a n/a
2024-02-14 2023-12-31 13F MUELLER WTR PRODS COM SER A Put 10,400 -95.68 150 -95.11 n/a n/a n/a
2023-11-14 2023-09-30 13F MUELLER WTR PRODS COM SER A Put 240,500 34,257.14 3,050 27,618.18 n/a n/a n/a
2023-08-14 2023-06-30 13F MUELLER WTR PRODS COM SER A Put 700 -36.36 11 -26.67 n/a n/a n/a
2023-05-15 2023-03-31 13F MUELLER WTR PRODS COM SER A Put 1,100 15 n/a n/a n/a
2022-05-16 2022-03-31 13F MUELLER WTR PRODS COM SER A Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-02-14 2021-12-31 13F MUELLER WTR PRODS COM SER A Put 20,500 41.38 295 33.48 n/a n/a n/a
2021-11-15 2021-09-30 13F MUELLER WTR PRODS Cmn Put 14,500 22.88 221 30.00 n/a n/a n/a
2021-08-16 2021-06-30 13F MUELLER WTR PRODS COM SER A Put 11,800 8.26 170 12.58 n/a n/a n/a
2021-05-21 2021-03-31 13F/A MUELLER WTR PRODS COM SER A Put 10,900 -7.63 151 -11.18 n/a n/a n/a
2021-05-17 2021-03-31 13F MUELLER WTR PRODS COM SER A Put 10,900 151 n/a n/a n/a
2020-08-14 2020-06-30 13F MUELLER WTR PRODS Cmn Put 0 -100.00 0 -100.00 n/a n/a n/a
2020-05-15 2020-03-31 13F MUELLER WTR PRODS Cmn Put 10,000 80 n/a n/a n/a
2018-02-09 2017-12-31 13F MUELLER WTR PRODS Cmn Put 0 -100.00 0 -100.00 n/a n/a n/a
2017-11-09 2017-09-30 13F MUELLER WTR PRODS Cmn Put 10,000 -11.50 128 -3.03 n/a n/a n/a
2017-08-11 2017-06-30 13F MUELLER WTR PRODS Cmn Put 11,300 13.00 132 3.13 n/a n/a n/a
2015-11-16 2015-09-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Put 0 -100.00 0 -100.00 n/a n/a n/a
2015-08-14 2015-06-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Put 8,700 0.00 79 -8.14 n/a n/a n/a
2015-05-15 2015-03-31 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Put 8,700 8.75 86 4.88 n/a n/a n/a
2015-02-17 2014-12-31 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Put 8,000 100.00 82 148.48 n/a n/a n/a
2014-11-14 2014-09-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Put 4,000 33.33 33 26.92 n/a n/a n/a
2014-08-14 2014-06-30 13F MUELLER WATER PRODUCTS Cmn Put 3,000 -57.14 26 -61.19 n/a n/a n/a
2014-05-15 2014-03-31 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Put 7,000 70.73 67 76.32 n/a n/a n/a
2014-02-14 2013-12-31 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Put 4,100 -42.25 38 -33.33 n/a n/a n/a
2013-11-14 2013-09-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Put 7,100 47.92 57 72.73 n/a n/a n/a
2013-08-14 2013-06-30 13F MUELLER WATER PRODUCTS INC CMN STK Cmn Put 4,800 33 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.