Wellington Management Group LLP Reports 10.71% Stake in Amplitude, Inc. (AMPL)

Wellington Management Group LLP and its affiliated entities have filed a Schedule 13G regarding their position in Amplitude, Inc. (AMPL). As of March 31, 2026, the reporting group beneficially owns 11,154,556 shares of Common Stock, representing a 10.71% ownership stake in the company. This filing marks a significant increase from a previously reported 0% position, indicating a new substantial holding. The reporting persons include Wellington Management Group LLP, Wellington Group Holdings LLP, Wellington Investment Advisors Holdings LLP, and Wellington Management Company LLP. The shares are held of record by various clients of investment advisers directly or indirectly owned by Wellington Management Group LLP. The filing indicates that the shares were acquired in the ordinary course of business and not for the purpose of influencing or changing the control of the issuer. Wellington Management Company LLP specifically reported shared voting power over 6,459,651 shares and shared dispositive power over 9,183,551 shares.