TNDM TANDEM DIABETES CARE INC: institutional ownership and insider trading
292 funds reported holding $1.48B of TANDEM DIABETES CARE INC in their latest 13F filings; in Q2 2026 funds net bought $8.05M, with 44 new positions and 45 funds selling out; over the last 12 months insiders bought $0 and sold $4.36K on the open market.
Famous investors holding TNDM
- Izzy Englander (Millennium Management): $19.8M, 0.0% of the portfolio
- Two Sigma (Two Sigma Investments): $8.43M, 0.0% of the portfolio
- Ken Griffin (Citadel Advisors): $28.0M, 0.0% of the portfolio
- D. E. Shaw (D. E. Shaw & Co.): $10.3M, 0.0% of the portfolio
Largest institutional holders of TNDM
- BlackRock, Inc. (BLK) — $175M
- VANGUARD GROUP INC — $161M
- UBS Group AG (UBS) — $95.4M
- Sessa Capital IM, L.P. — $77.0M
- VANGUARD PORTFOLIO MANAGEMENT LLC — $64.9M
- First Light Asset Management, LLC — $51.1M
- VANGUARD CAPITAL MANAGEMENT LLC — $46.7M
- STATE STREET CORP (STT, STT-PG) — $43.0M
- GW&K Investment Management, LLC — $38.8M
- JENNISON ASSOCIATES LLC — $35.2M
Recent TNDM insider trades
- Mar 17, 2026: Novara Mark David sold 187 shares ($4.31K)
- Mar 5, 2026: Novara Mark David sold 2 shares ($46)
- Aug 11, 2025: Sheridan John F bought 10,000 shares ($102K)
- Aug 8, 2025: Vosseller Leigh bought 13,720 shares ($149K)
Members of Congress trading TNDM
- Sep 29, 2026: Gilbert Ray Cisneros, Jr. bought $1.00K–$15.0K
- Mar 3, 2026: Gilbert Ray Cisneros, Jr. bought $1.00K–$15.0K
- Sep 22, 2025: Josh Gottheimer bought $1.00K–$15.0K
- Mar 19, 2025: Josh Gottheimer sold $1.00K–$15.0K
- Mar 4, 2025: Gilbert Ray Cisneros, Jr. bought $1.00K–$15.0K
- Aug 5, 2024: Josh Gottheimer bought $1.00K–$15.0K
5%+ owners
- Vanguard Portfolio Management: 5.9% (Schedule 13G, filed Apr 29, 2026)
- Vanguard Capital Management: 5.2% (Schedule 13G, filed Apr 30, 2026)