+**13d** refers to [Schedule 13D](/wiki/Schedule_13D), a filing required by the U.S. [Securities and Exchange Commission](/wiki/SEC) when an individual or group acquires more than 5% beneficial ownership in a public company's stock. This document discloses the intent of the acquiring party, often signaling potential shifts in [corporate control](/wiki/Corporate_Control). Its purpose is to provide transparency to the market and other shareholders regarding significant ownership changes.
+## See also
+- [Beneficial Ownership](/wiki/Beneficial_Ownership)
+- [Public Company](/wiki/Public_Company)
+- [Stock Market](/wiki/Stock_Market)
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