SHANGHAI, Oct 28 (Reuters) - Chinese developer Oceanwide Holdings Co Ltd said on Thursday that holders of corporate debt issued by two of its offshore units have taken possession of the debt’s collateral after the units failed to repay the maturing notes. In a Shenzhen Stock Exchange filing, Oceanwide said that the company was in active talks with holders of the two Hong Kong dollar notes, worth a combined 2.5 billion Hong Kong dollars ($321.46 million), in pursuit of a solution. Oceanwide also said it was assessing the impact of the share and project collateral takeover on its operations and finances. The announcement is the latest illustration of financial strains on Chinese developers as real estate giant China Evergrande Group continues to grapple with its $300 billion in liabilities, and as developers and regulators seek to contain the fallout from its debt crisis. Oceanwide Holdings International Co issued 1.4 billion Hong Kong dollars worth of notes to a Singapore-based financial services firm in March 2019, using its shares in China Oceanwide Holdings and a San Francisco project as collateral, Oceanwide said. Another unit, Oceanwide Holdings International Financial Development Co, had issued notes worth 1.1 billion Hong Kong dollars to Spring Progress Investment Solutions Ltd, Oceanwide said. Oceanwide Holdings International Financial Development used its shares in two companies, including China Tonghai International Financial, and a San Francisco project as collateral. ($1 = 7.7771 Hong Kong dollars) (Reporting by Andrew Galbraith and Samuel Shen; Editing by Ana Nicolaci da Costa)