Vanguard Capital Management Acquires 5.18% Stake in Tandem Diabetes Care Inc

Vanguard Capital Management LLC filed a Schedule 13G on April 30, 2026, reporting a new 5.18% stake in Tandem Diabetes Care Inc (TNDM). As of the event date on March 31, 2026, the firm beneficially owns 3,553,772 shares of common stock. The filing indicates that Vanguard holds sole dispositive power over all 3,553,772 shares, while maintaining sole voting power over 514,853 shares. The securities were acquired in the ordinary course of business, and the filing includes ownership by several Vanguard affiliates, including Vanguard Asset Management Limited and Vanguard Global Advisers, LLC. This position represents a significant increase from a previous holding of zero, crossing the 5% regulatory threshold for reporting. Vanguard certifies that the acquisition was not intended to influence or change the control of the issuer. The total value of the position is estimated at approximately $69 million based on the filing data.