TANDEM DIABETES CARE INC (TNDM) Institutional Ownership and Insiders Activity

TANDEM DIABETES CARE INC (TNDM) is widely held by institutional investors, with 1 tracked firm reporting positions valued at approximately $1.12M based on SEC Form 13F filings for the quarter ended March 31, 2026.

Renaissance Technologies LLC is the largest disclosed holder, reporting approximately $1.12M in TNDM holdings in its latest filing.

Institutional ownership among tracked investors remains highly concentrated, with Renaissance Technologies LLC representing the majority of disclosed value.

Recent insider activity includes 11 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.