TNDM: Tandem Diabetes Care Inc insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 0 sales totaling - in the last 180 days.
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-08-06 | Fell below 5% | Voya Financial, Inc. | 0.20% | SEC |
Institutional ownership (Q2 2026)
274 institutions reported holding $1.14B of Tandem Diabetes Care Inc on Form 13F (275 the quarter before). 45 opened a new position and 46 sold out. Shares held by institutions: same.
| Largest holders | Shares | Value |
|---|---|---|
| BlackRock, Inc. | 11,583,125 | $174.79M |
| Sessa Capital IM, L.P. | 5,100,000 | $76.96M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4,299,667 | $64.88M |
| First Light Asset Management, LLC | 3,383,553 | $51.06M |
| VANGUARD CAPITAL MANAGEMENT LLC | 3,096,536 | $46.73M |
| STATE STREET CORP | 2,851,646 | $43.03M |
| JENNISON ASSOCIATES LLC | 2,331,429 | $35.18M |
| Paradice Investment Management LLC | 2,024,014 | $30.54M |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 2,006,429 | $30.28M |
| Freestone Grove Partners LP | 1,866,134 | $28.16M |
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