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https://www.irs.gov/ru/forms-pubs/about-form-8621
Information about Form 8621, Information Return by a Shareholder of a Passive Foreign Investment Company or Qualified Electing Fund, including recent updates,...
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https://www.hitachi.com/en/ir/stock/dividend/
Hitachi Investor Relations website contains financial information, annual reports, IR library and more information.
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