EX-21 5 oln-2023xexhibit21.htm SUBSIDIARIES OF OLIN CORPORATION
Exhibit 21
SUBSIDIARIES OF OLIN CORPORATION 1
(As of December 31, 2023)

Company | Jurisdiction
Blue Cube Holding LLC | DE
Blue Cube Intermediate Holding 2 LLC | DE
Blue Cube International Holdings LLC | DE
Blue Cube IP LLC | DE
Blue Cube Operations LLC | DE
Blue Cube Spinco LLC | DE
Blue Water Alliance JV, LLC | DE
Henderson Groundwater LLC | NV
HPCM LLC | DE
Hunt Trading Co. | MO
Imperial West Chemical Co. | NV
K. A. Steel Chemicals Inc. | DE
K. A. Steel International Inc. | DE
KAS Muscatine LLC | IA
KNA California, Inc. (see footnote 2) | DE
KWT, Inc. | DE
Monarch Brass & Copper Corp. | NY
Monarch Brass & Copper of New England Corp. | RI
New Haven Copper Company | CT
Niloco BCN Holdings, LLC | DE
Niloco Global Holdings LLC | DE
Niloco Hydrogen Holdings LLC | DE
Olin Benefits Management, Inc. | CA
Olin Business Holdings | DE
Olin Chlor Alkali Logistics Inc. | DE
Olin Chlorine 7, LLC | DE
Olin Engineered Systems, Inc. | DE
Olin Far East, Limited | DE
Olin Finance Company, LLC | DE
Olin Financial Services Inc. | DE
Olin Funding Company LLC | DE
Olin North American Holdings, Inc. | DE
Olin Russellville Cell Technologies LLC | DE
Olin Winchester, LLC | DE
Pioneer Americas LLC | DE
Pioneer Companies, LLC | DE
Pioneer (East), Inc. | DE
Pioneer Licensing, Inc. | DE
Pioneer Transportation LLC | DE
Pioneer Water Technologies, Inc. | DE
Ravenna Arsenal, Inc. | OH
TriOlin, LLC | DE
Waterbury Rolling Mills, Inc. | CT
Winchester Ammunition, Inc. | DE
Winchester Defense, LLC | DE
INTERNATIONAL |
3229897 Nova Scotia Co. | Nova Scotia, Canada
BC Switzerland GmbH | Switzerland
Blue Cube Netherlands Holding C.V. | Netherlands

Blue Cube Australia Pty Ltd | Australia
Blue Cube Brasil Comércio de Produtos Químicos Ltda. (see footnote 3 for Subordinates) | Brazil
Blue Cube Chemicals Hong Kong Limited | Hong Kong
Blue Cube Chemicals India Private Limited | India
Blue Cube Chemicals Italy S.r.l. | Italy
Blue Cube Chemical Korea Ltd. | Korea
Blue Cube Chemicals Singapore Pte. Ltd. | Singapore
Blue Cube Chemicals Singapore Pte. Ltd. Taiwan Branch | Taiwan
Blue Cube Chemicals South Africa Pty Ltd | South Africa
Blue Cube Chemicals (UK) Limited | United Kingdom
Blue Cube Chemicals (Zhangjiagang) Co., Ltd. | China
Blue Cube Chemicals (Zhangjiagang) Co., Ltd. Shanghai Branch | China
Blue Cube Denmark ApS | Denmark
Blue Cube Germany Assets GmbH & Co. KG | Germany
Blue Cube Germany Assets Management GmbH | Germany
Blue Cube Japan LLC | Japan
Blue Cube Mexico, S. de R.L. de C.V. | Mexico
Blue Cube Netherlands B.V. | Netherlands
Blue Cube Rasha OOO | Russia
Blue Cube (Thailand) Company Limited | Thailand
Blue Cube (Thailand) Company Limited Hong Kong Branch | Hong Kong
Blue Cube Turkey Kimyasal Ürünler Limited Şirketi | Turkey
Blue Water Alliance JV LLP | United Kingdom
BWA Japan Godo Kaisha | Japan
CANSO Chemicals Limited | Nova Scotia, Canada
Nedastra Holding B.V. | Netherlands
Niloco Cyprus Limited | Cyprus
Olin Canada ULC | Nova Scotia, Canada
Olin Cyprus Holdings Ltd. | Cyprus
Olin Germany AP LTP GmbH | Germany
Olin Germany Upstream GmbH & Co. KG | Germany
Olin Hunt Specialty Products S.r.l. | Italy
Olin International Holdings Limited | United Kingdom
Winchester Australia Limited | Australia

Footnotes:
1 | Omitted from the following list are the names of certain subsidiaries which, if considered in the aggregate as a single subsidiary, would not constitute a significant subsidiary
2 | In California only this entity conducts business under the name of Kemwater KNA California, Inc.
3 | Subordinates of Blue Cube Brasil Comércio de Produtos Químicos Ltda.: • Sâo Paulo Branch of Blue Cube Brasil Comércio de Produtos Químicos Ltda. • Bahia Branch of Blue Cube Brasil Comércio de Produtos Químicos Ltda. (Caustic Soda) • Paraná Branch of Blue Cube Brasil Comércio de Produtos Químicos Ltda. (Caustic Soda)