Tandem Diabetes Care INC Schedule 13G passive stakes

Voya Financial, Inc. has filed a Schedule 13G, disclosing a passive ownership of 0.2% in Tandem Diabetes Care Inc. common stock.

Voya Financial, Inc. has reported beneficial ownership of 4,343,683 shares, representing 6.3% of Tandem Diabetes Care Inc.'s common stock, as of March 31, 2026.

Vanguard Capital Management has reported beneficial ownership of 5.18% of Tandem Diabetes Care Inc.'s common stock as of March 31, 2026.

Vanguard Portfolio Management has reported a beneficial ownership of 5.91% in Tandem Diabetes Care Inc., holding over 4 million shares.

The Vanguard Group reports 0% beneficial ownership in Tandem Diabetes Care Inc. following an internal realignment.

ArrowMark Colorado Holdings, LLC has reported a 5.46% beneficial ownership stake in Tandem Diabetes Care Inc. common stock.

Sessa Capital and its affiliates, including John Petry, have filed a Schedule 13G, reporting a passive beneficial ownership of 6.71% in Tandem Diabetes Care Inc., totaling 4,466,307 shares.

BlackRock, Inc. has filed an amended Schedule 13G, revealing a significant beneficial ownership of 15.2% in Tandem Diabetes Care Inc. as of March 31, 2025.