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 |
|---|---|---|---|---|---|
| Cetera Investment Advisers | 10,937 | $240.4K | 0.00% | −2,992−21.5% | Reduced |
| Apollon Wealth Management, LLC | 10,958 | $240.9K | 0.00% | −299−2.7% | Reduced |
| Lighthouse Investment Partners, LLC | 11,000 | $241.8K | 0.01% | +11,000 | New |
| Guggenheim Capital LLC | 11,154 | $245.2K | 0.00% | +462+4.3% | Added |
| Mercer Global Advisors Inc | 11,294 | $248.2K | 0.00% | +11,294 | New |
| Fox Run Management, L.L.C. | 11,398 | $250.5K | 0.04% | +11,398 | New |
| Man Group plc | 12,782 | $280.9K | 0.00% | +12,782 | New |
| Tower Research Capital LLC (TRC) | 13,058 | $287.0K | 0.01% | +11,048+549.7% | Added |
| Captrust Financial Advisors | 13,111 | $288.2K | 0.00% | +860+7.0% | Added |
| ProShare Advisors LLC | 13,185 | $289.8K | 0.00% | +579+4.6% | Added |
| 180 Wealth Advisors, LLC | 13,443 | $295.5K | 0.03% | +3,047+29.3% | Added |
| MN Wealth Advisors, LLC | 13,770 | $302.7K | 0.15% | −3,660−21.0% | Reduced |
| KLP Kapitalforvaltning AS | 14,500 | $318.7K | 0.00% | +1,000+7.4% | Added |
| Schonfeld Strategic Advisors LLC | 14,590 | $320.7K | 0.00% | −128,265−89.8% | Reduced |
| CAPROCK Group, Inc. | 14,831 | $326.0K | 0.01% | −29,528−66.6% | Reduced |
| Greenwood Capital Associates LLC | 15,350 | $337.4K | 0.04% | +15,350 | New |
| Oregon Public Employees Retirement Fund | 15,505 | $340.8K | 0.00% | +234+1.5% | Added |
| Neuberger Berman Group LLC | 15,978 | $351.2K | 0.00% | +877+5.8% | Added |
| Holocene Advisors, LP | 16,418 | $360.9K | 0.00% | +16,418 | New |
| Commerce Bank | 16,632 | $365.6K | 0.00% | −125−0.7% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 16,786 | $369.0K | 0.00% | −422−2.5% | Reduced |
| Teachers Retirement System of the State of Kentucky | 16,851 | $371.0K | 0.00% | −2,152−11.3% | Reduced |
| OP Asset Management Ltd | 17,114 | $376.2K | 0.00% | 00.0% | Unchanged |
| Yousif Capital Management, LLC | 18,781 | $384.8K | 0.00% | −2,546−11.9% | Reduced |
| Citigroup Inc | 18,368 | $403.7K | 0.00% | −10,455−36.3% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 18,505 | $406.7K | 0.00% | 00.0% | Unchanged |
| Bank of Montreal | 18,522 | $407.1K | 0.00% | −16,271−46.8% | Reduced |
| State Board of Administration of Florida Retirement System | 18,552 | $407.8K | 0.00% | 00.0% | Unchanged |
| Arizona State Retirement System | 18,897 | $415.4K | 0.00% | −796−4.0% | Reduced |
| State of Tennessee, Treasury Department | 21,514 | $427.9K | 0.00% | −10,784−33.4% | Reduced |
| CI Private Wealth, LLC | 19,535 | $429.4K | 0.00% | +19,535 | New |
| PharVision Advisers, LLC | 19,554 | $429.8K | 0.22% | −2,714−12.2% | Reduced |
| Diversified Trust Co | 19,558 | $429.9K | 0.01% | +1,219+6.6% | Added |
| Amalgamated Bank | 19,640 | $432.0K | 0.00% | +23+0.1% | Added |
| New York State Common Retirement Fund | 19,948 | $438.5K | 0.00% | 00.0% | Unchanged |
| Wealth Enhancement Advisory Services, LLC | 18,693 | $440.0K | 0.00% | +3,611+23.9% | Added |
| CWM Advisors, LLC | 21,066 | $463.0K | 0.04% | −17,353−45.2% | Reduced |
| Comerica Bank | 21,445 | $471.4K | 0.00% | −4,104−16.1% | Reduced |
| The PNC Financial Services Group, Inc. | 22,347 | $491.2K | 0.00% | +1,192+5.6% | Added |
| Counterpoint Mutual Funds LLC | 22,858 | $502.4K | 0.04% | −19,407−45.9% | Reduced |
| Advisors Asset Management, Inc. | 23,776 | $522.6K | 0.01% | −536−2.2% | Reduced |
| CWM, LLC | 24,449 | $537.0K | 0.00% | +2,466+11.2% | Added |
| Virginia Retirement Systems Et Al | 24,700 | $542.9K | 0.00% | −12,300−33.2% | Reduced |
| Deerfield Management Company, L.P. (Series C) | 26,090 | $573.5K | 0.01% | +13,895+113.9% | Added |
| Ieq Capital, LLC | 27,178 | $597.4K | 0.00% | +27,178 | New |
| Intech Investment Management LLC | 27,371 | $601.6K | 0.01% | −46,122−62.8% | Reduced |
| Bayforest Capital Ltd | 27,409 | $602.5K | 0.45% | +8,114+42.1% | Added |
| Stifel Financial Corp | 27,485 | $604.1K | 0.00% | −11,529−29.6% | Reduced |
| Franklin Resources Inc | 27,897 | $613.2K | 0.00% | −12,875−31.6% | Reduced |
| Truist Financial Corp | 28,171 | $619.2K | 0.00% | −87,405−75.6% | Reduced |
| Amundi | 29,445 | $647.2K | 0.00% | +18,423+167.1% | Added |
| Manufacturers Life Insurance Company, The | 29,720 | $653.2K | 0.00% | −1,890−6.0% | Reduced |
| Janus Henderson Group PLC | 29,811 | $655.4K | 0.00% | 00.0% | Unchanged |
| Louisiana State Employees Retirement System | 31,100 | $683.6K | 0.01% | 00.0% | Unchanged |
| Gsa Capital Partners LLP | 31,184 | $685.0K | 0.06% | −67,757−68.5% | Reduced |
| State of Wyoming | 31,798 | $698.9K | 0.08% | +16,755+111.4% | Added |
| American Century Companies Inc | 32,760 | $720.1K | 0.00% | +110.0% | Added |
| Quantbot Technologies LP | 32,956 | $724.4K | 0.02% | −580−1.7% | Reduced |
| Brevan Howard Capital Management LP | 34,091 | $749.3K | 0.01% | −92,797−73.1% | Reduced |
| Summit Trail Advisors, LLC | 34,529 | $758.9K | 0.01% | −66,781−65.9% | Reduced |
| HighMark Wealth Management LLC | 35,120 | $771.9K | 0.31% | +11,550+49.0% | Added |
| Mariner, LLC | 35,529 | $781.0K | 0.00% | +10,726+43.2% | Added |
| Quest Partners LLC | 35,634 | $783.2K | 0.04% | +12,724+55.5% | Added |
| HSBC Holdings PLC | 36,553 | $810.3K | 0.00% | −56,373−60.7% | Reduced |
| Oppenheimer Asset Management Inc. | 37,940 | $833.9K | 0.01% | −3,555−8.6% | Reduced |
| Capital Fund Management S.A. | 38,400 | $844.0K | 0.01% | −132,709−77.6% | Reduced |
| State of Alaska, Department of Revenue | 38,676 | $849.0K | 0.01% | +523+1.4% | Added |
| MetLife Investment Management | 39,091 | $859.2K | 0.00% | 00.0% | Unchanged |
| LPL Financial LLC | 39,590 | $870.2K | 0.00% | +716+1.8% | Added |
| Brinker Capital Investments, LLC | 40,579 | $891.9K | 0.01% | −3,403−7.7% | Reduced |
| Jump Financial, LLC | 41,416 | $910.3K | 0.01% | −77,028−65.0% | Reduced |
| State of Wisconsin Investment Board | 43,090 | $947.1K | 0.00% | −21,591−33.4% | Reduced |
| Winton Group Ltd | 44,244 | $972.5K | 0.03% | +44,244 | New |
| Nierenberg Investment Management Company, Inc. | 44,555 | $979.3K | 0.49% | +44,555 | New |
| Thrivent Financial for Lutherans | 46,589 | $1.02M | 0.00% | −2,157−4.4% | Reduced |
| Deutsche Bank AG | 54,230 | $1.19M | 0.00% | −536−1.0% | Reduced |
| Norges Bank | 54,306 | $1.19M | 0.00% | +54,306 | New |
| Great West Life Assurance Co | 56,332 | $1.24M | 0.00% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 56,809 | $1.25M | 0.00% | −8,994−13.7% | Reduced |
| Natixis Advisors, L.P. | 57,021 | $1.25M | 0.00% | +617+1.1% | Added |
| Group One Trading, L.P. | 60,736 | $1.33M | 0.04% | −24,035−28.4% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 61,443 | $1.35M | 0.00% | −1,255−2.0% | Reduced |
| SG Americas Securities, LLC | 61,958 | $1.36M | 0.00% | −1,093−1.7% | Reduced |
| Rice Hall James & Associates, LLC | 62,415 | $1.37M | 0.08% | −40,154−39.1% | Reduced |
| California State Teachers Retirement System | 64,411 | $1.42M | 0.00% | +3,810+6.3% | Added |
| Prudential Financial Inc | 65,014 | $1.43M | 0.00% | −4,420−6.4% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 66,452 | $1.46M | 0.02% | −139,602−67.8% | Reduced |
| New York State Teachers Retirement System | 68,300 | $1.50M | 0.00% | 00.0% | Unchanged |
| Formula Growth Ltd | 70,919 | $1.56M | 0.60% | −51,177−41.9% | Reduced |
| Legato Capital Management LLC | 72,580 | $1.60M | 0.14% | +72,580 | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 74,015 | $1.63M | 0.00% | +52,566+245.1% | Added |
| Cerity Partners LLC | 76,771 | $1.69M | 0.00% | +472+0.6% | Added |
| Y-Intercept (Hong Kong) Ltd | 83,986 | $1.85M | 0.04% | +27,061+47.5% | Added |
| Wells Fargo & Company | 84,411 | $1.86M | 0.00% | +32,237+61.8% | Added |
| Engineers Gate Manager LP | 88,547 | $1.95M | 0.02% | +88,547 | New |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 89,094 | $1.96M | 0.00% | −9,216−9.4% | Reduced |
| Banque Pictet & Cie SA | 97,187 | $2.14M | 0.02% | +22,205+29.6% | Added |
| Wellington Management Group LLP | 98,309 | $2.16M | 0.00% | +98,309 | New |
| Trexquant Investment LP | 102,719 | $2.26M | 0.02% | −395,001−79.4% | Reduced |
| SEI Investments Co | 106,598 | $2.34M | 0.00% | −109,386−50.6% | Reduced |