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Rockwool, a Russian maker of stone-wool thermal insulation that was placed under temporary management in early 2026 by decree of Russia's President, has filed a lawsuit against its Danish parent, Rockwool A/S, in the Moscow Region Arbitration Court, a state commercial court, according to the electronic database of Russia's arbitration courts. Rockwool is seeking 8.6 billion rubles (USD 102 million at the current exchange rate) from its Danish owner.

Rockwool said in a press release, reported by RBC, that it was seeking to recover 8.6 billion rubles under a loan — comprising 5 billion rubles of principal plus accrued interest and a penalty. At the end of 2020 the Russian unit extended a loan to its parent; the repayment date was pushed back repeatedly, most recently to 2030. According to Rockwool, the borrower paid no interest and repaid none of the debt.

Timur Amirov, chief executive of Construction Assets Development (AO RSA) — the joint-stock company acting as Rockwool's temporary manager — told RBC that "the Danish owners' grey tax-avoidance scheme had, after 2022, de facto turned into the illegal expatriation of capital from the country".

According to Rockwool Russia, in 2025 the Danish side sought several times to obtain permission from the government commission that vets foreign investment to offset dividends payable by Rockwool to the parent against the parent's loan debt, but was refused. In January 2026 Rockwool demanded early repayment of the loan, but the Danish company said this was impossible, citing EU sanctions that prohibit satisfying the claims of Russian companies.

At the end of 2025 Russian President Vladimir Putin signed a decree transferring Rockwool's Russian assets to temporary management. The company's four factories were handed to Construction Assets Development, whose owners are not disclosed.