Tandem Diabetes Care Inc
TNDM- Exchange
- Nasdaq
- Industry
- Surgical & Medical Instruments & Apparatus
- SEC CIK
- 0001438133
No open-market purchases or sales by Tandem Diabetes Care Inc insiders were filed in the last 90 days; 274 institutions reported holding it in 13F filings for Q2 2026, worth $1.19B in total; no superinvestor holds it.
13F holders, Q3 2023
Institutional positions in Tandem Diabetes Care Inc as of Sep 30, 2023. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 226
- −19 vs. Q2 2023
- Shares held
- 69.6M
- +2.42M (+3.6%) vs. Q2 2023
- Total value
- $1.45B
- −$204.6M (−12.4%) vs. Q2 2023
- New holders
- 26
- 80 more added
- Sold out
- 45
- 89 more reduced
2 institutions that held it in Q2 2023 haven't filed for Q3 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2023: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting TNDM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 274 | $1.19B |
| Q1 2026 | 274 | $1.51B |
| Q4 2025 | 269 | $1.65B |
| Q3 2025 | 255 | $911.3M |
| Q2 2025 | 271 | $1.51B |
| Q1 2025 | 275 | $1.40B |
| Q4 2024 | 316 | $2.60B |
| Q3 2024 | 332 | $3.10B |
| Q2 2024 | 317 | $2.96B |
| Q1 2024 | 291 | $2.63B |
| Q4 2023 | 268 | $2.10B |
| Q3 2023 | 226 | $1.45B |
| Q2 2023 | 247 | $1.65B |
| Q1 2023 | 274 | $2.77B |
| Q4 2022 | 295 | $2.89B |
| Q3 2022 | 299 | $3.00B |
| Q2 2022 | 331 | $3.64B |
| Q1 2022 | 379 | $6.92B |
| Q4 2021 | 388 | $9.09B |
| Q3 2021 | 338 | $7.32B |
| Q2 2021 | 303 | $5.75B |
| Q1 2021 | 290 | $5.08B |
Institutions, Q3 2023
Shares, value and share of portfolio for each institution holding Tandem Diabetes Care Inc; share changes are against Q2 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Millennium Management LLC | 503,869 | $10.5M | 0.01% | −543,516−51.9% | Reduced |
| Bank of New York Mellon Corp | 514,657 | $10.7M | 0.00% | −888−0.2% | Reduced |
| Citadel Advisors LLC | 645,364 | $13.4M | 0.01% | +474,239+277.1% | Added |
| Morgan Stanley | 774,643 | $16.1M | 0.00% | +371,356+92.1% | Added |
| Two Sigma Investments, LP | 780,534 | $16.2M | 0.05% | −427,271−35.4% | Reduced |
| Jacobs Levy Equity Management, Inc | 793,488 | $16.5M | 0.10% | +2,633+0.3% | Added |
| Chicago Capital, LLC | 904,410 | $18.8M | 0.88% | +791,336+699.8% | Added |
| Stephens Investment Management Group LLC | 989,095 | $20.5M | 0.34% | −21,486−2.1% | Reduced |
| Geode Capital Management, LLC | 999,311 | $20.8M | 0.00% | +25,959+2.7% | Added |
| Two Sigma Advisers, LP | 1,030,383 | $21.4M | 0.05% | −183,100−15.1% | Reduced |
| Voloridge Investment Management, LLC | 1,047,963 | $21.8M | 0.11% | +170,932+19.5% | Added |
| Jennison Associates LLC | 1,122,915 | $23.3M | 0.02% | +804,488+252.6% | Added |
| First Light Asset Management, LLC | 1,440,966 | $29.9M | 2.84% | +840,199+139.9% | Added |
| Paradice Investment Management LLC | 1,520,065 | $31.6M | 2.71% | +293,250+23.9% | Added |
| Brown Capital Management LLC | 1,564,542 | $32.5M | 0.50% | −27,187−1.7% | Reduced |
| Champlain Investment Partners, LLC | 1,615,879 | $33.6M | 0.22% | −2,841−0.2% | Reduced |
| ArrowMark Colorado Holdings LLC | 1,631,544 | $33.9M | 0.41% | +1,631,544 | New |
| Capital International Investors | 1,794,187 | $37.3M | 0.01% | +558,943+45.2% | Added |
| Bellevue Group AG | 2,142,769 | $44.5M | 0.72% | +49,835+2.4% | Added |
| State Street Corp | 2,169,844 | $45.1M | 0.00% | −87,584−3.9% | Reduced |
| Janus Henderson Group PLC | 2,671,231 | $55.5M | 0.04% | +586,832+28.2% | Added |
| FMR LLC | 2,992,067 | $62.1M | 0.01% | −1,568,238−34.4% | Reduced |
| Eminence Capital, LP | 5,490,017 | $114.0M | 2.26% | +2,372,458+76.1% | Added |
| Capital World Investors | 6,545,338 | $135.9M | 0.03% | +59,311+0.9% | Added |
| Vanguard Group Inc | 7,003,335 | $145.5M | 0.00% | −9,568−0.1% | Reduced |
| BlackRock Inc. | 8,856,487 | $183.9M | 0.01% | −113,740−1.3% | Reduced |
| Octagon Capital Advisors LP | 0 | $0 | 0.00% | −474,929−100.0% | Sold out |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0 | $0 | 0.00% | −427,025−100.0% | Sold out |
| Eagle Health Investments LP | 0 | $0 | 0.00% | −320,325−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −215,299−100.0% | Sold out |
| Man Group plc | 0 | $0 | 0.00% | −191,923−100.0% | Sold out |
| Essex Investment Management Co LLC | 0 | $0 | 0.00% | −175,688−100.0% | Sold out |
| Kennedy Capital Management, Inc. | 0 | $0 | 0.00% | −140,704−100.0% | Sold out |
| 1492 Capital Management LLC | 0 | $0 | 0.00% | −95,074−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −84,677−100.0% | Sold out |
| Amundi | 0 | $0 | 0.00% | −73,446−100.0% | Sold out |
| Seven Eight Capital, LP | 0 | $0 | 0.00% | −51,861−100.0% | Sold out |
| Twinbeech Capital LP | 0 | $0 | 0.00% | −48,469−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −42,514−100.0% | Sold out |
| Candriam Luxembourg S.C.A. | 0 | $0 | 0.00% | −36,587−100.0% | Sold out |
| Voss Capital, LLC | 0 | $0 | 0.00% | −35,000−100.0% | Sold out |
| Oak Thistle LLC | 0 | $0 | 0.00% | −24,643−100.0% | Sold out |
| Divisadero Street Capital Management, LP | 0 | $0 | 0.00% | −20,000−100.0% | Sold out |
| Legato Capital Management LLC | 0 | $0 | 0.00% | −14,676−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −14,265−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −14,034−100.0% | Sold out |
| Bridge City Capital, LLC | 0 | $0 | 0.00% | −13,469−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −12,640−100.0% | Sold out |
| Assenagon Asset Management S.A. | 0 | $0 | 0.00% | −12,053−100.0% | Sold out |
| NinePointTwo Capital | 0 | $0 | 0.00% | −11,023−100.0% | Sold out |
| Gabelli Funds LLC | 0 | $0 | 0.00% | −11,000−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −10,963−100.0% | Sold out |
| Duality Advisers, LP | 0 | $0 | 0.00% | −10,950−100.0% | Sold out |
| Lattice Capital Management, LLC | 0 | $0 | 0.00% | −9,200−100.0% | Sold out |
| Guggenheim Capital LLC | 0 | $0 | 0.00% | −9,190−100.0% | Sold out |
| Baird Financial Group, Inc. | 0 | $0 | 0.00% | −9,169−100.0% | Sold out |
| Aigen Investment Management, LP | 0 | $0 | 0.00% | −8,632−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −8,504−100.0% | Sold out |
| Allianz Asset Management GmbH | 0 | $0 | 0.00% | −8,400−100.0% | Sold out |
| Crossmark Global Holdings, Inc. | 0 | $0 | 0.00% | −5,754−100.0% | Sold out |
| Leonteq Securities AG | 0 | $0 | 0.00% | −6,512−100.0% | Sold out |
| Aquatic Capital Management LLC | 0 | $0 | 0.00% | −3,900−100.0% | Sold out |
| Gilder Gagnon Howe & Co LLC | 0 | $0 | 0.00% | −2,710−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −719−100.0% | Sold out |
| Acadian Asset Management LLC | 0 | $0 | 0.00% | −669−100.0% | Sold out |
| Headlands Technologies LLC | 0 | $0 | 0.00% | −549−100.0% | Sold out |
| Loomis Sayles & Co L P | 0 | $0 | 0.00% | −79−100.0% | Sold out |
| NewSquare Capital LLC | 0 | $0 | 0.00% | −65−100.0% | Sold out |
| Fiduciary Alliance LLC | 0 | $0 | 0.00% | −42−100.0% | Sold out |
| Baker Avenue Asset Management, LP | 0 | $0 | 0.00% | −26−100.0% | Sold out |
| Prestige Wealth Management Group LLC | 0 | $0 | 0.00% | −24−100.0% | Sold out |
| Kistler-Tiffany Companies, LLC | – | – | – | – | Not filed |
| Coastal Capital Group, Inc. | – | – | – | – | Not filed |