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 2025
Institutional positions in Tandem Diabetes Care Inc as of Sep 30, 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
- 255
- −15 vs. Q2 2025
- Shares held
- 75.1M
- −5.90M (−7.3%) vs. Q2 2025
- Total value
- $911.3M
- −$595.7M (−39.5%) vs. Q2 2025
- New holders
- 42
- 76 more added
- Sold out
- 57
- 97 more reduced
1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Tandem Diabetes Care Inc; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Wells Fargo & Company | 52,174 | $633.4K | 0.00% | +1,893+3.8% | Added |
| Thrivent Financial for Lutherans | 48,746 | $592.0K | 0.00% | −231−0.5% | Reduced |
| CAPROCK Group, Inc. | 44,359 | $554.9K | 0.01% | +44,359 | New |
| Brinker Capital Investments, LLC | 43,982 | $533.9K | 0.00% | −629−1.4% | Reduced |
| Counterpoint Mutual Funds LLC | 42,265 | $513.1K | 0.04% | +42,265 | New |
| Bryce Point Capital, LLC | 42,258 | $513.0K | 0.63% | +42,258 | New |
| Oppenheimer Asset Management Inc. | 41,495 | $503.7K | 0.01% | −12,546−23.2% | Reduced |
| Franklin Resources Inc | 40,772 | $495.0K | 0.00% | +13,822+51.3% | Added |
| First Trust Advisors LP | 40,730 | $494.5K | 0.00% | +40,730 | New |
| Citadel Advisors LLC | 39,801 | $483.2K | 0.00% | −313,158−88.7% | Reduced |
| MetLife Investment Management | 39,091 | $474.6K | 0.00% | 00.0% | Unchanged |
| Stifel Financial Corp | 39,014 | $473.6K | 0.00% | +3,485+9.8% | Added |
| LPL Financial LLC | 38,874 | $471.9K | 0.00% | +1,414+3.8% | Added |
| CWM Advisors, LLC | 38,419 | $466.4K | 0.05% | +17,576+84.3% | Added |
| State of Alaska, Department of Revenue | 38,153 | $462.0K | 0.00% | −1,507−3.8% | Reduced |
| Virginia Retirement Systems Et Al | 37,000 | $449.2K | 0.00% | +100+0.3% | Added |
| Bank of Montreal | 34,793 | $422.4K | 0.00% | −175,539−83.5% | Reduced |
| Quantbot Technologies LP | 33,536 | $407.1K | 0.01% | +91+0.3% | Added |
| American Century Companies Inc | 32,749 | $397.6K | 0.00% | +32,749 | New |
| State of Tennessee, Treasury Department | 32,298 | $392.1K | 0.00% | −3,891−10.8% | Reduced |
| Manufacturers Life Insurance Company, The | 31,610 | $383.7K | 0.00% | −1,591−4.8% | Reduced |
| Louisiana State Employees Retirement System | 31,100 | $377.6K | 0.01% | 00.0% | Unchanged |
| Janus Henderson Group PLC | 29,811 | $362.1K | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 28,823 | $349.9K | 0.00% | −58,302−66.9% | Reduced |
| Quadrature Capital Ltd | 26,756 | $325.1K | 0.00% | +26,756 | New |
| Versor Investments LP | 26,200 | $318.1K | 0.06% | +26,200 | New |
| Comerica Bank | 25,549 | $310.2K | 0.00% | −4,005−13.6% | Reduced |
| Mariner, LLC | 24,803 | $301.1K | 0.00% | +7,062+39.8% | Added |
| Advisors Asset Management, Inc. | 24,312 | $295.1K | 0.01% | −689−2.8% | Reduced |
| HighMark Wealth Management LLC | 23,570 | $286.1K | 0.13% | −100−0.4% | Reduced |
| Verition Fund Management LLC | 23,066 | $280.0K | 0.00% | −195,520−89.4% | Reduced |
| Quest Partners LLC | 22,910 | $278.1K | 0.02% | +5,539+31.9% | Added |
| PharVision Advisers, LLC | 22,268 | $270.3K | 0.15% | +22,268 | New |
| Handelsbanken Fonder AB | 22,000 | $267.0K | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 21,983 | $267.0K | 0.00% | +19,187+686.2% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 21,449 | $260.4K | 0.00% | 00.0% | Unchanged |
| Yousif Capital Management, LLC | 21,327 | $258.9K | 0.00% | −3,818−15.2% | Reduced |
| The PNC Financial Services Group, Inc. | 21,155 | $256.8K | 0.00% | +201+1.0% | Added |
| New York State Common Retirement Fund | 19,948 | $242.2K | 0.00% | −177,827−89.9% | Reduced |
| Arizona State Retirement System | 19,693 | $239.1K | 0.00% | +285+1.5% | Added |
| Amalgamated Bank | 19,617 | $238.0K | 0.00% | +657+3.5% | Added |
| Bayforest Capital Ltd | 19,295 | $234.2K | 0.11% | +10,024+108.1% | Added |
| Teachers Retirement System of the State of Kentucky | 19,003 | $231.0K | 0.00% | −2,287−10.7% | Reduced |
| Prelude Capital Management, LLC | 18,754 | $227.7K | 0.02% | +18,754 | New |
| State Board of Administration of Florida Retirement System | 18,552 | $225.2K | 0.00% | 00.0% | Unchanged |
| Police & Firemen's Retirement System of New Jersey | 18,505 | $224.7K | 0.00% | +3,206+21.0% | Added |
| Diversified Trust Co | 18,339 | $222.6K | 0.00% | +1,991+12.2% | Added |
| Wealth Enhancement Advisory Services, LLC | 15,082 | $219.0K | 0.00% | +15,082 | New |
| MN Wealth Advisors, LLC | 17,430 | $211.6K | 0.11% | +17,430 | New |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 17,208 | $208.9K | 0.00% | +107+0.6% | Added |
| Ensign Peak Advisors, Inc | 17,182 | $208.6K | 0.00% | −7,800−31.2% | Reduced |
| OP Asset Management Ltd | 17,114 | $207.8K | 0.00% | 00.0% | Unchanged |
| Commerce Bank | 16,757 | $203.4K | 0.00% | −28,345−62.8% | Reduced |
| Keebeck Alpha, LP | 16,623 | $201.8K | 0.28% | +16,623 | New |
| Oregon Public Employees Retirement Fund | 15,271 | $185.4K | 0.00% | 00.0% | Unchanged |
| Neuberger Berman Group LLC | 15,101 | $183.3K | 0.00% | −2,132−12.4% | Reduced |
| State of Wyoming | 15,043 | $182.6K | 0.02% | −6,393−29.8% | Reduced |
| Cetera Investment Advisers | 13,929 | $169.1K | 0.00% | −794−5.4% | Reduced |
| Amundi | 11,022 | $165.4K | 0.00% | 00.0% | Unchanged |
| Atom Investors LP | 13,521 | $164.1K | 0.01% | +13,521 | New |
| KLP Kapitalforvaltning AS | 13,500 | $163.9K | 0.00% | 00.0% | Unchanged |
| ProShare Advisors LLC | 12,606 | $153.0K | 0.00% | −2,313−15.5% | Reduced |
| Everence Capital Management Inc | 12,376 | $150.0K | 0.01% | +12,376 | New |
| Captrust Financial Advisors | 12,251 | $148.7K | 0.00% | −12,515−50.5% | Reduced |
| Deerfield Management Company, L.P. (Series C) | 12,195 | $148.0K | 0.00% | +12,195 | New |
| Davy Global Fund Management Ltd | 11,851 | $143.9K | 0.01% | 00.0% | Unchanged |
| Apollon Wealth Management, LLC | 11,257 | $136.7K | 0.00% | −109−1.0% | Reduced |
| Leonteq Securities AG | 11,042 | $134.1K | 0.01% | +5,151+87.4% | Added |
| Guggenheim Capital LLC | 10,692 | $129.8K | 0.00% | +10,692 | New |
| 180 Wealth Advisors, LLC | 10,396 | $126.2K | 0.02% | +10,396 | New |
| Creative Planning | 10,290 | $124.9K | 0.00% | +10,290 | New |
| Advisor Group Holdings, Inc. | 8,487 | $105.8K | 0.00% | −792−8.5% | Reduced |
| Advisory Services Network, LLC | 8,274 | $100.4K | 0.00% | −3,187−27.8% | Reduced |
| China Universal Asset Management Co., Ltd. | 8,000 | $97.1K | 0.01% | +8,000 | New |
| Public Employees Retirement Association of Colorado | 7,650 | $93.0K | 0.00% | 00.0% | Unchanged |
| SRS Capital Advisors, Inc. | 7,151 | $86.8K | 0.00% | +6,675+1,402.3% | Added |
| Walleye Trading LLC | 7,118 | $86.4K | 0.00% | +975+15.9% | Added |
| Ameritas Investment Partners, Inc. | 5,586 | $67.8K | 0.00% | −1,284−18.7% | Reduced |
| Aster Capital Management (DIFC) Ltd | 5,149 | $62.5K | 0.03% | +4,269+485.1% | Added |
| CoreCap Advisors, LLC | 4,751 | $57.7K | 0.00% | +3,468+270.3% | Added |
| Shell Asset Management Co | 3,878 | $47.0K | 0.00% | −18,974−83.0% | Reduced |
| Quarry LP | 3,695 | $44.9K | 0.01% | +3,558+2,597.1% | Added |
| Simplex Trading, LLC | 3,558 | $43.0K | 0.00% | −6,876−65.9% | Reduced |
| Essential Partners LLC | 2,862 | $34.7K | 0.01% | +2,862 | New |
| Farther Finance Advisors, LLC | 2,635 | $32.0K | 0.00% | −2−0.1% | Reduced |
| Stonehage Fleming Financial Services Holdings Ltd | 2,551 | $31.0K | 0.00% | 00.0% | Unchanged |
| Creative Financial Designs Inc | 2,522 | $30.6K | 0.00% | 00.0% | Unchanged |
| US Bancorp | 2,355 | $28.6K | 0.00% | −33,005−93.3% | Reduced |
| Caitong International Asset Management Co., Ltd | 2,205 | $26.8K | 0.02% | +1,470+200.0% | Added |
| Van Eck Associates Corp | 2,049 | $25.0K | 0.00% | −4,492−68.7% | Reduced |
| Tower Research Capital LLC (TRC) | 2,010 | $24.4K | 0.00% | −7,158−78.1% | Reduced |
| Assetmark, Inc | 1,750 | $21.2K | 0.00% | 00.0% | Unchanged |
| AdvisorNet Financial, Inc | 1,680 | $20.4K | 0.00% | −39−2.3% | Reduced |
| McIlrath & Eck, LLC | 1,605 | $19.5K | 0.00% | 00.0% | Unchanged |
| Point72 Europe (London) LLP | 1,573 | $19.1K | 0.00% | +1,573 | New |
| Jones Financial Companies LLLP | 1,311 | $15.7K | 0.00% | −100−7.1% | Reduced |
| First Horizon Corp | 1,194 | $14.5K | 0.00% | +1,194 | New |
| Quadrant Capital Group LLC | 1,132 | $13.7K | 0.00% | +1,132 | New |
| GAMMA Investing LLC | 1,113 | $13.5K | 0.00% | −508−31.3% | Reduced |
| Salem Investment Counselors Inc | 1,000 | $12.1K | 0.00% | 00.0% | Unchanged |