Tandem Diabetes Care, Inc. TNDM
$15.32
-2.7% 52w: $10.12 – $28.26
Latest 13F among current holders filed 23 days ago (Jun 12, 2026)
Price — last 12 months
research preview data10.1219.1928.26
Jun 20, 2025 Jul 2, 2026
Institutional holders
274
+6 QoQ
13F value
$1.51B
-8.3% QoQ
Smart-money holders
10
signal tier ≥ 2
New smart buyers
3
Q1 2026
Options barometer
13.8×
$106.2M calls / $7.7M puts
Institutional value by quarter
Number of holders
Who owns TNDM?
Q1 2026 filings| Fund | Type | Shares | Value | % of fund | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | Index provider | 10.7M | $204.9M | 0.0% | -4.1% |
| Sessa Capital IM, L.P. ★3 | Fundamental concentrated | 4.7M | $90.7M | 1.7% | -5.4% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Diversified mechanical | 4.0M | $76.6M | 0.0% | — |
| ArrowMark Colorado Holdings LLC | Other | 3.1M | $59.5M | 1.6% | +7.4% |
| VANGUARD CAPITAL MANAGEMENT LLC | Diversified mechanical | 3.0M | $58.3M | 0.0% | — |
| GW&K Investment Management, LLC | Other | 2.7M | $51.5M | 0.5% | +0.5% |
| STATE STREET CORP | Index provider | 2.7M | $51.0M | 0.0% | +0.8% |
| Driehaus Capital Management LLC | Other | 2.3M | $44.2M | 0.3% | +43.1% |
| GOLDMAN SACHS GROUP INC | Bank broker | 2.2M | $42.5M | 0.0% | +31.8% |
| CITADEL ADVISORS LLC | Multistrat pod | 2.2M | $42.0M | 0.0% | +5.0% |
| UBS Group AG | Bank broker | 2.0M | $39.3M | 0.0% | +390.1% |
| Paradice Investment Management LLC ★3 | Fundamental concentrated | 2.0M | $39.2M | 7.4% | -1.7% |
| TWO SIGMA INVESTMENTS, LP | Quant stat arb | 1.9M | $35.7M | 0.0% | +55.2% |
| GEODE CAPITAL MANAGEMENT, LLC | Index provider | 1.7M | $32.2M | 0.0% | +1.8% |
| JENNISON ASSOCIATES LLC | Other | 1.7M | $31.8M | 0.0% | -18.0% |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Other | 1.5M | $29.2M | 0.1% | -7.8% |
| MARSHALL WACE, LLP | Quant stat arb | 1.4M | $27.7M | 0.0% | +64.8% |
| MORGAN STANLEY | Bank broker | 1.4M | $26.0M | 0.0% | -34.7% |
| Freestone Grove Partners LP | Quant stat arb | 1.3M | $25.5M | 0.2% | -7.8% |
| First Light Asset Management, LLC ★3 | Fundamental concentrated | 1.3M | $25.2M | 2.3% | +20.7% |
| BAILLIE GIFFORD & CO ★2 | Long only active | 1.1M | $20.9M | 0.0% | -4.9% |
| WELLINGTON MANAGEMENT GROUP LLP | Long only active | 1.0M | $20.0M | 0.0% | +960.7% |
| VOYA INVESTMENT MANAGEMENT LLC | Diversified mechanical | 804.1K | $15.4M | 0.0% | +151.7% |
| D. E. Shaw & Co., Inc. | Quant stat arb | 783.9K | $15.0M | 0.0% | -8.2% |
| Soleus Capital Management, L.P. ★2 | Fundamental diversified | 783.0K | $15.0M | 0.6% | New |
| Defilade Capital Management, L.P. ★2 | Fundamental concentrated | 761.9K | $14.6M | 2.1% | New |
| MILLENNIUM MANAGEMENT LLC | Multistrat pod | 761.7K | $14.6M | 0.0% | +30.5% |
| FMR LLC | Long only active | 714.0K | $13.7M | 0.0% | +6.1% |
| NORTHERN TRUST CORP | Index provider | 706.6K | $13.5M | 0.0% | +2.2% |
| ROYCE & ASSOCIATES LP | Other | 696.6K | $13.4M | 0.1% | +7.1% |
| Quantinno Capital Management LP | Diversified mechanical | 653.9K | $12.5M | 0.0% | +123.5% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Index provider | 642.6K | $12.3M | 0.0% | -0.6% |
| ExodusPoint Capital Management, LP | Multistrat pod | 632.9K | $12.1M | 0.1% | New |
| Holocene Advisors, LP | Other | 477.4K | $9.2M | 0.0% | +2807.5% |
| VANGUARD FIDUCIARY TRUST CO | Diversified mechanical | 471.7K | $9.0M | 0.0% | — |
| Aberdeen Group plc | Other | 434.0K | $8.3M | 0.0% | -20.7% |
| BARCLAYS PLC | Bank broker | 421.2K | $8.1M | 0.0% | -54.1% |
| Point72 Asset Management, L.P. | Multistrat pod | 420.5K | $8.1M | 0.0% | New |
| FRONTIER CAPITAL MANAGEMENT CO LLC | Other | 397.2K | $7.6M | 0.1% | -3.7% |
| BANK OF AMERICA CORP /DE/ | Bank broker | 373.2K | $7.2M | 0.0% | -46.9% |
| Nuveen, LLC | Diversified mechanical | 363.8K | $7.0M | 0.0% | -35.4% |
| JPMORGAN CHASE & CO | Bank broker | 349.8K | $6.9M | 0.0% | +2.4% |
| DAFNA Capital Management LLC ★2 | Fundamental diversified | 355.2K | $6.8M | 1.6% | Held |
| FIRST TRUST ADVISORS LP | Index provider | 342.7K | $6.6M | 0.0% | New |
| Bank of New York Mellon Corp | Diversified mechanical | 336.3K | $6.4M | 0.0% | -3.8% |
| AQR CAPITAL MANAGEMENT LLC | Quant stat arb | 331.9K | $6.4M | 0.0% | -2.3% |
| PRINCIPAL FINANCIAL GROUP INC | Diversified mechanical | 331.5K | $6.4M | 0.0% | +2.2% |
| Invesco Ltd. | Index provider | 294.1K | $5.6M | 0.0% | +5.9% |
| ACADIAN ASSET MANAGEMENT LLC | Quant stat arb | 278.1K | $5.3M | 0.0% | -29.2% |
| SECTOR GAMMA AS ★3 | Fundamental concentrated | 267.1K | $5.1M | 1.2% | Held |
Exits are not a bearish signal: our backtest shows stocks specialists exit keep outperforming for 3+ quarters — selling usually means profit-taking, not a forecast.
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