Institutional Ownership
Tandem Diabetes Care Inc
CUSIP 875372203COM NEWTNDMQ1 2026
13D / 13G Filings
38
Schedule 13D/13G on record
Beneficial Filers
10
Distinct reporting persons
Largest Stake
17.0%
Max % of class reported
Institutional Holders
263
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
38 filings · latest Feb 17, 2026
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Feb 17, 2026 | Arrowmark Colorado Holdings, LLC | 13G/A | 4.3% | 2.89M | SEC |
| 2 | Nov 13, 2025 | Arrowmark Colorado Holdings, LLC | 13G | 5.5% | 3.69M | SEC |
| 3 | May 15, 2025 | Sessa Capital (Master), L.P. | 13G | 6.7% | — | SEC |
| 4 | Apr 29, 2025 | Blackrock, Inc. | 13G/A | 15.2% | 10.11M | SEC |
| 5 | Nov 14, 2024 | Eminence Capital, LP | 13G/A | — | — | SEC |
| 6 | Nov 8, 2024 | Blackrock, Inc. | 13G/A | 17.0% | 11.11M | SEC |
| 7 | Oct 18, 2024 | Blackrock, Inc. | 13G/A | 17.0% | 11.11M | SEC |
| 8 | Sep 9, 2024 | Capital World Investors | 13G/A | 5.0% | 3.27M | SEC |
| 9 | Feb 14, 2024 | Eminence Capital, LP | 13G | 7.9% | 5.17M | SEC |
| 10 | Feb 13, 2024 | Vanguard Group Inc | 13G/A | 10.8% | 7.02M | SEC |
28 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Tandem Diabetes Care Inc.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Blackrock, Inc. | 10.69M | $204.94M |
| 2 | Sessa Capital Im, L.P. | 4.73M | $90.69M |
| 3 | Arrowmark Colorado Holdings LLC | 3.10M | $59.50M |
| 4 | State Street Corp | 2.66M | $51.04M |
| 5 | Driehaus Capital Management LLC | 2.30M | $44.18M |
| 6 | Goldman Sachs Group Inc | 2.22M | $42.54M |
| 7 | Citadel Advisors LLC | 2.19M | $42.03M |
| 8 | Ubs Group AG | 2.05M | $39.26M |
| 9 | Paradice Investment Management LLC | 2.04M | $39.15M |
| 10 | Two Sigma Investments, LP | 1.86M | $35.74M |