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, Q4 2025
Institutional positions in Tandem Diabetes Care Inc as of Dec 31, 2025. 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
- 269
- +21 vs. Q3 2025
- Shares held
- 74.9M
- +524.4K (+0.7%) vs. Q3 2025
- Total value
- $1.65B
- +$743.2M (+82.4%) vs. Q3 2025
- New holders
- 53
- 85 more added
- Sold out
- 32
- 99 more reduced
7 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: 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, Q4 2025
Shares, value and share of portfolio for each institution holding Tandem Diabetes Care Inc; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| LPL Financial LLC | 39,590 | $870.2K | 0.00% | +716+1.8% | Added |
| MetLife Investment Management | 39,091 | $859.2K | 0.00% | 00.0% | Unchanged |
| State of Alaska, Department of Revenue | 38,676 | $849.0K | 0.01% | +523+1.4% | Added |
| Capital Fund Management S.A. | 38,400 | $844.0K | 0.01% | −132,709−77.6% | Reduced |
| Oppenheimer Asset Management Inc. | 37,940 | $833.9K | 0.01% | −3,555−8.6% | Reduced |
| HSBC Holdings PLC | 36,553 | $810.3K | 0.00% | −56,373−60.7% | Reduced |
| Quest Partners LLC | 35,634 | $783.2K | 0.04% | +12,724+55.5% | Added |
| Mariner, LLC | 35,529 | $781.0K | 0.00% | +10,726+43.2% | Added |
| HighMark Wealth Management LLC | 35,120 | $771.9K | 0.31% | +11,550+49.0% | Added |
| Summit Trail Advisors, LLC | 34,529 | $758.9K | 0.01% | −66,781−65.9% | Reduced |
| Brevan Howard Capital Management LP | 34,091 | $749.3K | 0.01% | −92,797−73.1% | Reduced |
| Quantbot Technologies LP | 32,956 | $724.4K | 0.02% | −580−1.7% | Reduced |
| American Century Companies Inc | 32,760 | $720.1K | 0.00% | +110.0% | Added |
| State of Wyoming | 31,798 | $698.9K | 0.08% | +16,755+111.4% | Added |
| Gsa Capital Partners LLP | 31,184 | $685.0K | 0.06% | −67,757−68.5% | Reduced |
| Louisiana State Employees Retirement System | 31,100 | $683.6K | 0.01% | 00.0% | Unchanged |
| Janus Henderson Group PLC | 29,811 | $655.4K | 0.00% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 29,720 | $653.2K | 0.00% | −1,890−6.0% | Reduced |
| Amundi | 29,445 | $647.2K | 0.00% | +18,423+167.1% | Added |
| Truist Financial Corp | 28,171 | $619.2K | 0.00% | −87,405−75.6% | Reduced |
| Franklin Resources Inc | 27,897 | $613.2K | 0.00% | −12,875−31.6% | Reduced |
| Stifel Financial Corp | 27,485 | $604.1K | 0.00% | −11,529−29.6% | Reduced |
| Bayforest Capital Ltd | 27,409 | $602.5K | 0.45% | +8,114+42.1% | Added |
| Intech Investment Management LLC | 27,371 | $601.6K | 0.01% | −46,122−62.8% | Reduced |
| Ieq Capital, LLC | 27,178 | $597.4K | 0.00% | +27,178 | New |
| Deerfield Management Company, L.P. (Series C) | 26,090 | $573.5K | 0.01% | +13,895+113.9% | Added |
| Virginia Retirement Systems Et Al | 24,700 | $542.9K | 0.00% | −12,300−33.2% | Reduced |
| CWM, LLC | 24,449 | $537.0K | 0.00% | +2,466+11.2% | Added |
| Advisors Asset Management, Inc. | 23,776 | $522.6K | 0.01% | −536−2.2% | Reduced |
| Counterpoint Mutual Funds LLC | 22,858 | $502.4K | 0.04% | −19,407−45.9% | Reduced |
| The PNC Financial Services Group, Inc. | 22,347 | $491.2K | 0.00% | +1,192+5.6% | Added |
| Comerica Bank | 21,445 | $471.4K | 0.00% | −4,104−16.1% | Reduced |
| CWM Advisors, LLC | 21,066 | $463.0K | 0.04% | −17,353−45.2% | Reduced |
| Wealth Enhancement Advisory Services, LLC | 18,693 | $440.0K | 0.00% | +3,611+23.9% | Added |
| New York State Common Retirement Fund | 19,948 | $438.5K | 0.00% | 00.0% | Unchanged |
| Amalgamated Bank | 19,640 | $432.0K | 0.00% | +23+0.1% | Added |
| Diversified Trust Co | 19,558 | $429.9K | 0.01% | +1,219+6.6% | Added |
| PharVision Advisers, LLC | 19,554 | $429.8K | 0.22% | −2,714−12.2% | Reduced |
| CI Private Wealth, LLC | 19,535 | $429.4K | 0.00% | +19,535 | New |
| State of Tennessee, Treasury Department | 21,514 | $427.9K | 0.00% | −10,784−33.4% | Reduced |
| Arizona State Retirement System | 18,897 | $415.4K | 0.00% | −796−4.0% | Reduced |
| State Board of Administration of Florida Retirement System | 18,552 | $407.8K | 0.00% | 00.0% | Unchanged |
| Bank of Montreal | 18,522 | $407.1K | 0.00% | −16,271−46.8% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 18,505 | $406.7K | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 18,368 | $403.7K | 0.00% | −10,455−36.3% | Reduced |
| Yousif Capital Management, LLC | 18,781 | $384.8K | 0.00% | −2,546−11.9% | Reduced |
| OP Asset Management Ltd | 17,114 | $376.2K | 0.00% | 00.0% | Unchanged |
| Teachers Retirement System of the State of Kentucky | 16,851 | $371.0K | 0.00% | −2,152−11.3% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 16,786 | $369.0K | 0.00% | −422−2.5% | Reduced |
| Commerce Bank | 16,632 | $365.6K | 0.00% | −125−0.7% | Reduced |
| Holocene Advisors, LP | 16,418 | $360.9K | 0.00% | +16,418 | New |
| Neuberger Berman Group LLC | 15,978 | $351.2K | 0.00% | +877+5.8% | Added |
| Oregon Public Employees Retirement Fund | 15,505 | $340.8K | 0.00% | +234+1.5% | Added |
| Greenwood Capital Associates LLC | 15,350 | $337.4K | 0.04% | +15,350 | New |
| CAPROCK Group, Inc. | 14,831 | $326.0K | 0.01% | −29,528−66.6% | Reduced |
| Schonfeld Strategic Advisors LLC | 14,590 | $320.7K | 0.00% | −128,265−89.8% | Reduced |
| KLP Kapitalforvaltning AS | 14,500 | $318.7K | 0.00% | +1,000+7.4% | Added |
| MN Wealth Advisors, LLC | 13,770 | $302.7K | 0.15% | −3,660−21.0% | Reduced |
| 180 Wealth Advisors, LLC | 13,443 | $295.5K | 0.03% | +3,047+29.3% | Added |
| ProShare Advisors LLC | 13,185 | $289.8K | 0.00% | +579+4.6% | Added |
| Captrust Financial Advisors | 13,111 | $288.2K | 0.00% | +860+7.0% | Added |
| Tower Research Capital LLC (TRC) | 13,058 | $287.0K | 0.01% | +11,048+549.7% | Added |
| Man Group plc | 12,782 | $280.9K | 0.00% | +12,782 | New |
| Fox Run Management, L.L.C. | 11,398 | $250.5K | 0.04% | +11,398 | New |
| Mercer Global Advisors Inc | 11,294 | $248.2K | 0.00% | +11,294 | New |
| Guggenheim Capital LLC | 11,154 | $245.2K | 0.00% | +462+4.3% | Added |
| Lighthouse Investment Partners, LLC | 11,000 | $241.8K | 0.01% | +11,000 | New |
| Apollon Wealth Management, LLC | 10,958 | $240.9K | 0.00% | −299−2.7% | Reduced |
| Cetera Investment Advisers | 10,937 | $240.4K | 0.00% | −2,992−21.5% | Reduced |
| Verition Fund Management LLC | 10,587 | $232.7K | 0.00% | −12,479−54.1% | Reduced |
| Prosperitas Financial LLC | 10,000 | $219.8K | 0.09% | +10,000 | New |
| EP Wealth Advisors, LLC | 9,977 | $219.3K | 0.00% | +9,977 | New |
| Maryland State Retirement & Pension System | 9,855 | $216.6K | 0.00% | +9,855 | New |
| Victory Capital Management Inc | 9,771 | $214.8K | 0.00% | +9,771 | New |
| Colony Group, LLC | 9,546 | $209.8K | 0.00% | +9,546 | New |
| Creative Planning | 9,478 | $208.3K | 0.00% | −812−7.9% | Reduced |
| EntryPoint Capital, LLC | 9,477 | $208.3K | 0.08% | +9,477 | New |
| Fiduciary Trust Co | 9,447 | $207.6K | 0.00% | +9,447 | New |
| Park Avenue Securities LLC | 9,403 | $207.0K | 0.00% | +9,403 | New |
| Walleye Trading LLC | 9,358 | $205.7K | 0.00% | +2,240+31.5% | Added |
| China Universal Asset Management Co., Ltd. | 8,000 | $175.8K | 0.01% | 00.0% | Unchanged |
| Leonteq Securities AG | 7,806 | $171.6K | 0.01% | −3,236−29.3% | Reduced |
| Public Employees Retirement Association of Colorado | 7,650 | $168.0K | 0.00% | 00.0% | Unchanged |
| CoreCap Advisors, LLC | 5,909 | $129.9K | 0.00% | +1,158+24.4% | Added |
| Ameritas Investment Partners, Inc. | 5,586 | $122.8K | 0.00% | 00.0% | Unchanged |
| Ensign Peak Advisors, Inc | 5,032 | $110.6K | 0.00% | −12,150−70.7% | Reduced |
| GAMMA Investing LLC | 4,542 | $99.8K | 0.01% | +3,429+308.1% | Added |
| Farther Finance Advisors, LLC | 3,600 | $79.1K | 0.00% | +965+36.6% | Added |
| Creative Financial Designs Inc | 3,431 | $75.4K | 0.00% | +909+36.0% | Added |
| Van Eck Associates Corp | 3,430 | $75.0K | 0.00% | +1,381+67.4% | Added |
| Pinnacle Wealth Planning Services, Inc. | 3,007 | $66.1K | 0.01% | +3,007 | New |
| Essential Partners LLC | 2,887 | $63.5K | 0.02% | +25+0.9% | Added |
| Advisor Group Holdings, Inc. | 2,616 | $57.5K | 0.00% | −5,871−69.2% | Reduced |
| Stonehage Fleming Financial Services Holdings Ltd | 2,551 | $56.1K | 0.00% | 00.0% | Unchanged |
| US Bancorp | 2,019 | $44.4K | 0.00% | −336−14.3% | Reduced |
| KBC Group NV | 2,011 | $44.0K | 0.00% | −189,826−99.0% | Reduced |
| Assetmark, Inc | 1,750 | $38.5K | 0.00% | 00.0% | Unchanged |
| AdvisorNet Financial, Inc | 1,680 | $36.9K | 0.00% | 00.0% | Unchanged |
| First Horizon Corp | 1,624 | $35.7K | 0.00% | +430+36.0% | Added |
| McIlrath & Eck, LLC | 1,605 | $35.3K | 0.00% | 00.0% | Unchanged |