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10-K primary document
MLI · Annual Report (Form 10-K) · Filed February 25, 2026

Mueller Industries Inc — 10-K exhibit

q42025exhibit21.htm
Mueller Industries Inc on Boardroom Alpha
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Exhibit 21.0

MUELLER INDUSTRIES, INC.
List of Subsidiaries
  State or Country
Subsidiary*of Incorporation
   
ATCO Rubber Products, Inc.Michigan
Mueller Brass Holding Company, Inc.Delaware
Mueller Brass Co. (Assumed name: Mueller Brass Products)Michigan
Extruded Metals, Inc. Delaware
Mueller Industrial Realty Co.Michigan
Itawamba Industrial Gas Company, Inc.Mississippi
Mueller Plastics Holding Company, Inc.Ohio
Mueller Brass Forging Company, Inc.Delaware
Mueller East, Inc.Delaware
Mueller Formed Tube Company, Inc.Delaware
Mueller Impacts Company, Inc.Delaware
Mueller Press Company, Inc.Mississippi
Mueller Refrigeration Products Company, Inc.Delaware
Mueller LBHC, Inc.Delaware
Lincoln Brass Works, Inc. (Assumed name: Mueller Gas Products)Michigan
Overstreet-Hughes, Co., Inc.Tennessee
Mueller Refrigeration, LLCDelaware
Mueller Refrigeration Holding Company, Inc.Delaware
Mueller Streamline Co.Michigan
Elkhart Products CorporationDelaware
Mueller Copper Tube Company, LLCDelaware
   Mueller Fittings Company, LLCMichigan
Kessler Sales & Distribution LLCDelaware
B&K LLC (d/b/a BK Products)Delaware
Precision Tube Company, LLCPennsylvania
Mueller Southeast, Inc.Pennsylvania
Joining Systems Company, LLC (9)
Delaware
Southland Pipe Nipples Company, Inc.Texas
Nehring Electrical Works Holdings LLCDelaware
Nehring Electrical Works Company, LLCIllinois
Express Wire and Cable Distributors, LLCIllinois
Unified Wire & Cable LLCIllinois
Conex Cable, LLCIllinois
Wurlitzer Dietz Property LLCIllinois
Peace Road Properties, LLCIllinois
Locust Properties, LLCIllinois
Mueller Tool and Machine, Inc.Delaware
Mueller Casting Company, Inc.Delaware
Mueller Packaging, LLCMississippi
Micro Gauge, Inc.Michigan
Microgauge Machining, Inc.Michigan
Propipe Technologies, Inc. (Assumed name: Mueller Gas Products)Ohio
WTC Holding CompanyMichigan


  State or Country
Subsidiary*of Incorporation
   DENO Investment Company II, Inc.Michigan
   Tecumseh Products Holdings LLC (7)
Delaware
   Tecumseh Products LLCMichigan
        MA Industrial Secured Lending LLC (5)
Delaware
Muellux Holding Company I SARLLuxembourg
Muellux Holding Company II SARLLuxembourg
Mueller Middle East W.L.L. (8)
Bahrain
Mueller Europe Investment Company Ltd.United Kingdom
Jungwoo Metal Ind. Co., Ltd. (6)
South Korea
   Mueller Europe LimitedUnited Kingdom
Westermeyer Industries, Inc.Illinois
Sherwood Valve Products, Inc.Ohio
Sherwood Valve LLC Delaware
DENO Investment Company, Inc.Michigan
Mueller de Mexico, S.A. de C.V. (1)
Mexico
The Mosack Group, LLC (2)
Delaware
B & K Industries, Inc.Illinois
Mueller Copper Tube Products, Inc.Delaware
Howell Metal Company (d/b/a Precision Tube)Virginia
Turbotec Products, Inc.Connecticut
Mueller Canada Holding Co. Ltd.Yukon Territory
Great Lakes Copper Ltd.Nova Scotia
Linesets, Inc.Delaware
Arava Natural Resources Company, Inc.Delaware
United States Fuel CompanyNevada
Canco Oil & Gas, Ltd.Alberta
Aegis Oil & Gas Leasing, Ltd.Alberta
Bayard Mining Corp.Delaware
Washington Mining CompanyMaine
Amwest Exploration CompanyDelaware
USSRAM Exploration CompanyMaine
Arava Exploration CompanyColorado
Summit Systems, Inc.Delaware
Mining Remedial Recovery CompanyDelaware
Carpentertown Coal & Coke CompanyPennsylvania
U.S.S. Lead Refinery, Inc.Maine
Leon Water Enterprises, Inc. (4)
Texas
Macomber Construction CompanyOhio
Macomber, IncorporatedOhio
MII Financial CorporationMichigan
Mueller Streamline Holding S.L.U.Spain
WTC HoldCo I, LLCDelaware
WTC HoldCo II, LLCDelaware
Mueller Comercial de Mexico, S. de R.L. de C.V. (3)
Mexico
Mueller Streamline II, LLCDelaware
Changzhou Mueller Refrigerant Valve Manufacturing Valve Co., Ltd.China
Mueller Industries Trading (Shanghai) Co., Ltd.China


  State or Country
Subsidiary*of Incorporation
Mueller Streamline Trading, LLCDelaware
Mueller Streamline China, LLCDelaware
*All subsidiaries are 100% owned, except as shown.
(1)  Owned by DENO Investment Company, Inc. (99.94%) and Mueller Streamline Co. (.06%)
(2)  Owned by DENO Investment Company, Inc. (28%)
(3) Owned by Mueller Streamline Holding S.L.U. (99.983%), WTC HoldCo I, LLC (0.016%), and WTC HoldCo II, LLC (0.001% )
(4)  Owned by OWL Petroleum Company (50%)
(5)  Owned by DENO Investment Company II, Inc. (50%)
(6)  Owned by Mueller Europe Investment Company Ltd. (60%)
(7) Owned by DENO Investment Company II, Inc. (50%)
(8) Owned by Muellux Holding Company II SARL (55%)
(9) Joining Systems Company, LLC is owned 60% by Mueller Streamline Co.




 



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