10 institutions reported holding $834,645 of TANDEM DIABETES CARE INC (TNDM) in SEC 13F filings for 2026-06-30. Largest institutional holders: Assenagon Asset Management S.A. ($398,829), 180 WEALTH ADVISORS, LLC ($376,254), GAMMA Investing LLC ($24,808), CoreCap Advisors, LLC ($17,565), MassMutual Private Wealth & Trust, FSB ($10,669). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Assenagon Asset Management S.A. | $398,829 | 26,430 | Trimmed |
| 2 | 180 WEALTH ADVISORS, LLC | $376,254 | 24,934 | Added |
| 3 | GAMMA Investing LLC | $24,808 | 1,644 | Trimmed |
| 4 | CoreCap Advisors, LLC | $17,565 | 1,164 | Trimmed |
| 5 | MassMutual Private Wealth & Trust, FSB | $10,669 | 707 | New |
| 6 | Versant Capital Management, Inc | $4,950 | 328 | Trimmed |
| 7 | ELEVATION WEALTH PARTNERS, LLC | $906 | 60 | Added |
| 8 | EASTERN BANK | $483 | 32 | Hold |
| 9 | Cedar Mountain Advisors, LLC | $181 | 12 | Hold |
| 10 | BEACON INVESTMENT ADVISORY SERVICES, INC. | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30