Private company
Who owns HMC Polymers Company Limited
One company in the researched set discloses a stake in HMC Polymers Company Limited, none of it sized by anyone who discloses it. HMC Polymers Company Limited is private, so no 13F reports it: a 13F covers exchange listed positions only. These figures exist because each holder disclosed the stake in its own filings.
HMC Polymers Company Limited - Profile
- Type
- joint venture
- Based in
- Thailand
- Founded
- 1983
HMC Polymers Company Limited makes polypropylene resin at Map Ta Phut Industrial Estate in Rayong, Thailand, running a propane dehydrogenation plant for propylene feedstock alongside four polypropylene lines with combined capacity above one million tonnes a year, which makes it the largest polypropylene producer in Southeast Asia. Its grades cover homopolymers, random copolymers and impact copolymers sold into roughly 35 countries, with end uses including sewage, drainage and household water pipes. The company was established in December 1983 by Himont, Metro (Srikrung), Hua Kee and Bangkok Bank, and started Thailand's first polypropylene production in November 1989 at an initial 100,000 tonnes a year. Its shareholders are PTT Global Chemical, which supplies most of the propylene feedstock, LyondellBasell, whose Spheripol and Spherizone process technologies the plants run on, and a group of Thai investors.
Source
HMC Polymers Company Limited files nothing with the SEC, so none of this comes from a filer record. The description was written for this site in August 2026 from Background and Milestones (HMC Polymers), LyondellBasell Joint Venture HMC Polymers expands production in Thailand (WebWire) and LyondellBasell JV to add PP capacity in Thailand (Plastics News). The ownership figures below come from the holders' filings instead, and are sourced row by row.
The disclosed stakes
One row per position. Where a holder reports the same company in two share classes, both rows are shown rather than summed, because the class is part of a position's identity.
Where each figure comes from
A private stake has no ownership form behind it, so the source is always the holder's own filing or disclosure. Anything modelled says so, with the arithmetic.
- LyondellBasell Industries N.V.. Exhibit 21.1 to the FY2025 10-K (filed 20 Feb 2026) states that Basell (Thailand) Holdings B.V. owns a 28.56% interest in HMC Polymers Company Limited. This is a 28.56 percent ownership interest, written here as the number 28.56, not as a fraction of 100. Cross-checked against Note 10 (Equity Investments) of the same 10-K, which lists 'HMC Polymers Company Ltd.' at 28.56.00% ownership as of both 31 Dec 2025 and 31 Dec 2024, confirming the figure independently within the same filing. LyondellBasell's balance sheet carries a single combined 'Equity investments' line ($3,963 million at 31 Dec 2025 per the 10-K; $3,875 million at 30 Jun 2026 per the most recent 10-Q) covering all equity-method investees together, so no individual carrying value is disclosed for this venture: value_usd is null. sourcesource 2
What this page is not
It is not a complete register. It lists the holders who happen to be inside the researched set and disclosed the stake themselves. A private company can have many other shareholders, and nothing here rules them out: venture investors, founders and employees usually appear in no public filing at all. Percentages are of HMC Polymers Company Limited where a holder stated one, and are missing where no holder did.