US mobile phone provider T-Mobile has just admitted to getting hacked, in a filing known as an 8-K that was submitted to the Securities and Exchange Commission (SEC) yesterday, 2023-01-19. The 8-K form is described by the SEC itself as “the ‘current report’ companies must file […] to announce major events that shareholders should know about.” These major events include issues such as bankruptcy or receivership (item 1.03), mine safety violations (item 1.04), changes in a organisations’s code of ethics (item 5.05), and a catch-all category, commonly used for reporting IT-related woes, dubbed simply Other Events (item 8.01).

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