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, Q2 2026
Institutional positions in Tandem Diabetes Care Inc as of Jun 30, 2026. 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
- 274
- +3 vs. Q1 2026
- Shares held
- 78.7M
- +94.9K (+0.1%) vs. Q1 2026
- Total value
- $1.19B
- −$319.1M (−21.2%) vs. Q1 2026
- New holders
- 48
- 95 more added
- Sold out
- 45
- 91 more reduced
3 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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, Q2 2026
Shares, value and share of portfolio for each institution holding Tandem Diabetes Care Inc; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Cresset Asset Management, LLC | 11,112 | $167.7K | 0.00% | −1,506−11.9% | Reduced |
| Amundi | 11,652 | $175.8K | 0.00% | −963−7.6% | Reduced |
| Proficio Capital Partners LLC | 11,897 | $179.5K | 0.01% | +11,897 | New |
| Guggenheim Capital LLC | 12,221 | $184.4K | 0.00% | −168−1.4% | Reduced |
| Advisors Asset Management, Inc. | 12,637 | $190.7K | 0.00% | −10,704−45.9% | Reduced |
| New Age Alpha Advisors, LLC | 12,853 | $194.0K | 0.01% | +12,853 | New |
| Neuberger Berman Group LLC | 13,382 | $201.9K | 0.00% | −2,687−16.7% | Reduced |
| Keebeck Alpha, LP | 13,534 | $204.2K | 0.43% | +13,534 | New |
| Redhawk Wealth Advisors, Inc. | 13,731 | $207.2K | 0.02% | +13,731 | New |
| KLP Kapitalforvaltning AS | 14,500 | $218.8K | 0.00% | 00.0% | Unchanged |
| Oregon Public Employees Retirement Fund | 15,605 | $235.5K | 0.00% | +100+0.6% | Added |
| SEI Investments Co | 15,814 | $238.6K | 0.00% | −79,492−83.4% | Reduced |
| Creative Planning | 16,216 | $244.7K | 0.00% | +16,216 | New |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 16,251 | $245.2K | 0.00% | −516−3.1% | Reduced |
| Commerce Bank | 16,278 | $245.6K | 0.00% | −64−0.4% | Reduced |
| Mercer Global Advisors Inc | 16,412 | $247.7K | 0.00% | −3,800−18.8% | Reduced |
| CI Private Wealth, LLC | 16,589 | $250.3K | 0.00% | −17,152−50.8% | Reduced |
| Teachers Retirement System of the State of Kentucky | 16,851 | $254.0K | 0.00% | 00.0% | Unchanged |
| Vanguard Investments Australia, Ltd. | 16,889 | $254.9K | 0.00% | 00.0% | Unchanged |
| Captrust Financial Advisors | 16,918 | $255.3K | 0.00% | +1,877+12.5% | Added |
| Dark Forest Capital Management LP | 17,430 | $263.0K | 0.02% | +17,430 | New |
| PDT Partners, LLC | 17,844 | $269.3K | 0.01% | −75,961−81.0% | Reduced |
| Amalgamated Bank | 18,398 | $278.0K | 0.00% | −1,120−5.7% | Reduced |
| Yousif Capital Management, LLC | 18,505 | $279.2K | 0.00% | +55+0.3% | Added |
| Arizona State Retirement System | 18,902 | $285.2K | 0.00% | +279+1.5% | Added |
| Prelude Capital Management, LLC | 19,002 | $286.7K | 0.02% | +19,002 | New |
| Caitong International Asset Management Co., Ltd | 19,968 | $301.3K | 0.04% | +5,723+40.2% | Added |
| Rhenman & Partners Asset Management AB | 20,000 | $301.8K | 0.03% | +20,000 | New |
| Leonteq Securities AG | 20,528 | $309.8K | 0.02% | +11,027+116.1% | Added |
| Walleye Trading LLC | 20,849 | $314.6K | 0.00% | +20,849 | New |
| Police & Firemen's Retirement System of New Jersey | 21,488 | $324.3K | 0.00% | +2,983+16.1% | Added |
| Summit Global Investments | 21,736 | $328.0K | 0.02% | +21,736 | New |
| State of Tennessee, Treasury Department | 22,070 | $333.0K | 0.00% | +7,423+50.7% | Added |
| Fifth Third Bancorp | 22,126 | $333.9K | 0.00% | −479−2.1% | Reduced |
| Greenwood Capital Associates LLC | 23,078 | $348.2K | 0.03% | +9,137+65.5% | Added |
| The PNC Financial Services Group, Inc. | 23,750 | $358.4K | 0.00% | +2,933+14.1% | Added |
| 180 Wealth Advisors, LLC | 24,934 | $376.3K | 0.04% | +9,171+58.2% | Added |
| Allstate Corp | 25,812 | $389.5K | 0.00% | +25,812 | New |
| Nomura Holdings Inc | 25,889 | $390.7K | 0.00% | +25,889 | New |
| Virginia Retirement Systems Et Al | 26,200 | $395.4K | 0.00% | +3,400+14.9% | Added |
| New York State Common Retirement Fund | 26,348 | $397.6K | 0.00% | +6,400+32.1% | Added |
| Assenagon Asset Management S.A. | 26,430 | $398.8K | 0.00% | −152,210−85.2% | Reduced |
| State of Alaska, Department of Revenue | 26,721 | $402.0K | 0.00% | −10,848−28.9% | Reduced |
| Vanguard Global Advisers, LLC | 26,897 | $405.9K | 0.00% | −62−0.2% | Reduced |
| Wealth Enhancement Advisory Services, LLC | 26,438 | $407.4K | 0.00% | +4,318+19.5% | Added |
| Manufacturers Life Insurance Company, The | 28,484 | $429.8K | 0.00% | −238−0.8% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 28,997 | $437.6K | 0.00% | −65,343−69.3% | Reduced |
| Jupiter Topco LLC | 29,811 | $449.7K | 0.00% | +29,811 | New |
| Louisiana State Employees Retirement System | 30,000 | $452.7K | 0.01% | −100−0.3% | Reduced |
| Truist Financial Corp | 30,319 | $457.5K | 0.00% | −300−1.0% | Reduced |
| HighMark Wealth Management LLC | 34,120 | $514.9K | 0.17% | 00.0% | Unchanged |
| State Board of Administration of Florida Retirement System | 34,628 | $522.5K | 0.00% | +16,076+86.7% | Added |
| Mariner, LLC | 36,750 | $554.6K | 0.00% | +3,742+11.3% | Added |
| Citigroup Inc | 40,230 | $607.1K | 0.00% | −28,116−41.1% | Reduced |
| Fox Run Management, L.L.C. | 40,462 | $610.6K | 0.10% | +40,462 | New |
| Oppenheimer Asset Management Inc. | 41,009 | $618.8K | 0.01% | +218+0.5% | Added |
| Brevan Howard Capital Management LP | 41,021 | $619.0K | 0.01% | +2,685+7.0% | Added |
| MetLife Investment Management | 41,045 | $619.4K | 0.00% | +2,237+5.8% | Added |
| State of Wisconsin Investment Board | 41,473 | $625.8K | 0.00% | −1,105−2.6% | Reduced |
| LPL Financial LLC | 42,802 | $645.9K | 0.00% | +13,319+45.2% | Added |
| Brinker Capital Investments, LLC | 43,713 | $659.6K | 0.01% | +1,843+4.4% | Added |
| CWM Advisors, LLC | 44,097 | $665.4K | 0.03% | +17,087+63.3% | Added |
| Thrivent Financial for Lutherans | 45,001 | $679.0K | 0.00% | −255−0.6% | Reduced |
| Franklin Resources Inc | 49,459 | $746.3K | 0.00% | +31,590+176.8% | Added |
| Man Group plc | 50,977 | $769.2K | 0.00% | +50,977 | New |
| Cambridge Investment Research Advisors, Inc. | 52,295 | $789.0K | 0.00% | +52,295 | New |
| Great West Life Assurance Co | 53,286 | $804.0K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global ETFs Holdings Ltd. | 56,396 | $851.0K | 0.00% | +1,209+2.2% | Added |
| Vanguard Asset Management, Ltd | 58,288 | $879.6K | 0.00% | 00.0% | Unchanged |
| Summit Trail Advisors, LLC | 59,862 | $903.3K | 0.01% | +22,119+58.6% | Added |
| Natixis Advisors, L.P. | 60,956 | $919.0K | 0.00% | −128−0.2% | Reduced |
| BNP Paribas Arbitrage, SA | 63,211 | $953.9K | 0.00% | −145,502−69.7% | Reduced |
| Engineers Gate Manager LP | 64,662 | $975.8K | 0.01% | +64,662 | New |
| Gsa Capital Partners LLP | 67,901 | $1.02M | 0.06% | +45,365+201.3% | Added |
| Stifel Financial Corp | 68,185 | $1.03M | 0.00% | +41,241+153.1% | Added |
| New York State Teachers Retirement System | 68,300 | $1.03M | 0.00% | +2,204+3.3% | Added |
| Susquehanna Portfolio Strategies, LLC | 68,897 | $1.04M | 0.02% | −137,296−66.6% | Reduced |
| Formula Growth Ltd | 70,304 | $1.06M | 0.37% | −524−0.7% | Reduced |
| Prudential Financial Inc | 70,474 | $1.06M | 0.00% | +1,070+1.5% | Added |
| Jones Financial Companies LLLP | 66,267 | $1.08M | 0.00% | +7,879+13.5% | Added |
| Wells Fargo & Company | 72,181 | $1.09M | 0.00% | +40,651+128.9% | Added |
| Deutsche Bank AG | 75,155 | $1.13M | 0.00% | +14,526+24.0% | Added |
| Cerity Partners LLC | 76,122 | $1.15M | 0.00% | −106−0.1% | Reduced |
| California State Teachers Retirement System | 77,227 | $1.17M | 0.00% | −7,028−8.3% | Reduced |
| Intech Investment Management LLC | 81,071 | $1.22M | 0.01% | −30,350−27.2% | Reduced |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 84,862 | $1.28M | 0.04% | +84,862 | New |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 84,904 | $1.28M | 0.00% | −2,453−2.8% | Reduced |
| Cinctive Capital Management LP | 86,906 | $1.31M | 0.05% | +23,094+36.2% | Added |
| Price T Rowe Associates Inc | 88,316 | $1.33M | 0.00% | +19,655+28.6% | Added |
| Alliancebernstein L.P. | 70,049 | $1.34M | 0.00% | −3,100−4.2% | Reduced |
| Trexquant Investment LP | 90,058 | $1.36M | 0.01% | −159,240−63.9% | Reduced |
| Gabelli Funds LLC | 103,000 | $1.55M | 0.01% | +78,000+312.0% | Added |
| Banque Pictet & Cie SA | 112,335 | $1.70M | 0.02% | −11,600−9.4% | Reduced |
| Ameriprise Financial Inc | 113,522 | $1.71M | 0.00% | −7,628−6.3% | Reduced |
| Susquehanna International Group, LLP | 117,958 | $1.78M | 0.00% | +37,209+46.1% | Added |
| Raymond James Financial Inc | 122,021 | $1.84M | 0.00% | −3,324−2.7% | Reduced |
| Federated Hermes, Inc. | 123,819 | $1.87M | 0.00% | 00.0% | Unchanged |
| Schonfeld Strategic Advisors LLC | 129,567 | $1.96M | 0.01% | +129,567 | New |
| Acadian Asset Management LLC | 137,237 | $2.06M | 0.00% | −140,879−50.7% | Reduced |
| Swiss National Bank | 137,500 | $2.07M | 0.00% | +4,200+3.2% | Added |