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 |
|---|---|---|---|---|---|
| Keebeck Alpha, LP | 16,623 | $201.8K | 0.28% | +16,623 | New |
| Commerce Bank | 16,757 | $203.4K | 0.00% | −28,345−62.8% | Reduced |
| OP Asset Management Ltd | 17,114 | $207.8K | 0.00% | 00.0% | Unchanged |
| Ensign Peak Advisors, Inc | 17,182 | $208.6K | 0.00% | −7,800−31.2% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 17,208 | $208.9K | 0.00% | +107+0.6% | Added |
| MN Wealth Advisors, LLC | 17,430 | $211.6K | 0.11% | +17,430 | New |
| Wealth Enhancement Advisory Services, LLC | 15,082 | $219.0K | 0.00% | +15,082 | New |
| Diversified Trust Co | 18,339 | $222.6K | 0.00% | +1,991+12.2% | Added |
| Police & Firemen's Retirement System of New Jersey | 18,505 | $224.7K | 0.00% | +3,206+21.0% | Added |
| State Board of Administration of Florida Retirement System | 18,552 | $225.2K | 0.00% | 00.0% | Unchanged |
| Prelude Capital Management, LLC | 18,754 | $227.7K | 0.02% | +18,754 | New |
| Teachers Retirement System of the State of Kentucky | 19,003 | $231.0K | 0.00% | −2,287−10.7% | Reduced |
| Bayforest Capital Ltd | 19,295 | $234.2K | 0.11% | +10,024+108.1% | Added |
| Amalgamated Bank | 19,617 | $238.0K | 0.00% | +657+3.5% | Added |
| Arizona State Retirement System | 19,693 | $239.1K | 0.00% | +285+1.5% | Added |
| New York State Common Retirement Fund | 19,948 | $242.2K | 0.00% | −177,827−89.9% | Reduced |
| The PNC Financial Services Group, Inc. | 21,155 | $256.8K | 0.00% | +201+1.0% | Added |
| Yousif Capital Management, LLC | 21,327 | $258.9K | 0.00% | −3,818−15.2% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 21,449 | $260.4K | 0.00% | 00.0% | Unchanged |
| 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 |
| PharVision Advisers, LLC | 22,268 | $270.3K | 0.15% | +22,268 | New |
| Quest Partners LLC | 22,910 | $278.1K | 0.02% | +5,539+31.9% | Added |
| Verition Fund Management LLC | 23,066 | $280.0K | 0.00% | −195,520−89.4% | Reduced |
| HighMark Wealth Management LLC | 23,570 | $286.1K | 0.13% | −100−0.4% | Reduced |
| Advisors Asset Management, Inc. | 24,312 | $295.1K | 0.01% | −689−2.8% | Reduced |
| Mariner, LLC | 24,803 | $301.1K | 0.00% | +7,062+39.8% | Added |
| Comerica Bank | 25,549 | $310.2K | 0.00% | −4,005−13.6% | Reduced |
| Versor Investments LP | 26,200 | $318.1K | 0.06% | +26,200 | New |
| Quadrature Capital Ltd | 26,756 | $325.1K | 0.00% | +26,756 | New |
| Citigroup Inc | 28,823 | $349.9K | 0.00% | −58,302−66.9% | Reduced |
| Janus Henderson Group PLC | 29,811 | $362.1K | 0.00% | 00.0% | Unchanged |
| Louisiana State Employees Retirement System | 31,100 | $377.6K | 0.01% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 31,610 | $383.7K | 0.00% | −1,591−4.8% | Reduced |
| State of Tennessee, Treasury Department | 32,298 | $392.1K | 0.00% | −3,891−10.8% | Reduced |
| American Century Companies Inc | 32,749 | $397.6K | 0.00% | +32,749 | New |
| Quantbot Technologies LP | 33,536 | $407.1K | 0.01% | +91+0.3% | Added |
| Bank of Montreal | 34,793 | $422.4K | 0.00% | −175,539−83.5% | Reduced |
| Virginia Retirement Systems Et Al | 37,000 | $449.2K | 0.00% | +100+0.3% | Added |
| State of Alaska, Department of Revenue | 38,153 | $462.0K | 0.00% | −1,507−3.8% | Reduced |
| CWM Advisors, LLC | 38,419 | $466.4K | 0.05% | +17,576+84.3% | Added |
| LPL Financial LLC | 38,874 | $471.9K | 0.00% | +1,414+3.8% | Added |
| Stifel Financial Corp | 39,014 | $473.6K | 0.00% | +3,485+9.8% | Added |
| MetLife Investment Management | 39,091 | $474.6K | 0.00% | 00.0% | Unchanged |
| Citadel Advisors LLC | 39,801 | $483.2K | 0.00% | −313,158−88.7% | Reduced |
| First Trust Advisors LP | 40,730 | $494.5K | 0.00% | +40,730 | New |
| Franklin Resources Inc | 40,772 | $495.0K | 0.00% | +13,822+51.3% | Added |
| Oppenheimer Asset Management Inc. | 41,495 | $503.7K | 0.01% | −12,546−23.2% | Reduced |
| Bryce Point Capital, LLC | 42,258 | $513.0K | 0.63% | +42,258 | New |
| Counterpoint Mutual Funds LLC | 42,265 | $513.1K | 0.04% | +42,265 | New |
| Brinker Capital Investments, LLC | 43,982 | $533.9K | 0.00% | −629−1.4% | Reduced |
| CAPROCK Group, Inc. | 44,359 | $554.9K | 0.01% | +44,359 | New |
| Thrivent Financial for Lutherans | 48,746 | $592.0K | 0.00% | −231−0.5% | Reduced |
| Wells Fargo & Company | 52,174 | $633.4K | 0.00% | +1,893+3.8% | Added |
| Great West Life Assurance Co | 56,332 | $664.0K | 0.00% | 00.0% | Unchanged |
| Deutsche Bank AG | 54,766 | $664.9K | 0.00% | +6,393+13.2% | Added |
| Natixis Advisors, L.P. | 56,404 | $685.0K | 0.00% | +13,992+33.0% | Added |
| Y-Intercept (Hong Kong) Ltd | 56,925 | $691.1K | 0.02% | +56,925 | New |
| California State Teachers Retirement System | 60,601 | $735.7K | 0.00% | +30.0% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 62,698 | $761.2K | 0.00% | −940−1.5% | Reduced |
| SG Americas Securities, LLC | 63,051 | $765.0K | 0.00% | +35,291+127.1% | Added |
| State of Wisconsin Investment Board | 64,681 | $785.2K | 0.00% | −95,938−59.7% | Reduced |
| Price T Rowe Associates Inc | 65,803 | $799.0K | 0.00% | +6,600+11.1% | Added |
| New York State Teachers Retirement System | 68,300 | $829.0K | 0.00% | 00.0% | Unchanged |
| Prudential Financial Inc | 69,434 | $842.9K | 0.00% | −313,370−81.9% | Reduced |
| Intech Investment Management LLC | 73,493 | $892.2K | 0.01% | +26,150+55.2% | Added |
| XTX Topco Ltd | 73,545 | $892.8K | 0.05% | +54,752+291.3% | Added |
| Banque Pictet & Cie SA | 74,982 | $910.3K | 0.01% | −9,046−10.8% | Reduced |
| Dark Forest Capital Management LP | 75,535 | $917.0K | 0.03% | +14,533+23.8% | Added |
| Cerity Partners LLC | 76,299 | $926.3K | 0.00% | −5,963−7.2% | Reduced |
| Group One Trading, L.P. | 84,771 | $1.03M | 0.03% | +28,831+51.5% | Added |
| HRT Financial LP | 88,761 | $1.08M | 0.00% | +88,761 | New |
| HSBC Holdings PLC | 92,926 | $1.08M | 0.00% | +63,184+212.4% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 98,310 | $1.19M | 0.00% | −3,036−3.0% | Reduced |
| Gsa Capital Partners LLP | 98,941 | $1.20M | 0.10% | +98,941 | New |
| Summit Trail Advisors, LLC | 101,310 | $1.23M | 0.02% | +76,430+307.2% | Added |
| Rice Hall James & Associates, LLC | 102,569 | $1.25M | 0.07% | −1,385−1.3% | Reduced |
| Truist Financial Corp | 115,576 | $1.40M | 0.00% | −7,955−6.4% | Reduced |
| Mizuho Markets Americas LLC | 117,362 | $1.42M | 0.03% | −21,380−15.4% | Reduced |
| Jump Financial, LLC | 118,444 | $1.44M | 0.02% | −44,506−27.3% | Reduced |
| Formula Growth Ltd | 122,096 | $1.48M | 0.53% | 00.0% | Unchanged |
| Brevan Howard Capital Management LP | 126,888 | $1.54M | 0.02% | +32,154+33.9% | Added |
| Swiss National Bank | 129,100 | $1.57M | 0.00% | +1,800+1.4% | Added |
| Raymond James Financial Inc | 136,926 | $1.66M | 0.00% | −6,348−4.4% | Reduced |
| Russell Investments Group, Ltd. | 137,672 | $1.67M | 0.00% | −61,041−30.7% | Reduced |
| Schonfeld Strategic Advisors LLC | 142,855 | $1.73M | 0.01% | −56,901−28.5% | Reduced |
| Renaissance Technologies LLC | 161,500 | $1.96M | 0.00% | −180,827−52.8% | Reduced |
| Ameriprise Financial Inc | 168,730 | $2.05M | 0.00% | −250,307−59.7% | Reduced |
| PDT Partners, LLC | 170,420 | $2.07M | 0.13% | 00.0% | Unchanged |
| Capital Fund Management S.A. | 171,109 | $2.08M | 0.02% | −91,322−34.8% | Reduced |
| Voya Investment Management LLC | 174,146 | $2.11M | 0.00% | +36,397+26.4% | Added |
| Divisadero Street Capital Management, LP | 174,692 | $2.12M | 0.10% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 175,096 | $2.13M | 0.00% | −82,363−32.0% | Reduced |
| Canada Pension Plan Investment Board | 177,600 | $2.16M | 0.00% | +177,600 | New |
| Legal & General Group Plc | 182,432 | $2.21M | 0.00% | −2,421−1.3% | Reduced |
| UBS Asset Management Americas Inc | 184,895 | $2.24M | 0.00% | −84,008−31.2% | Reduced |
| Rhumbline Advisers | 190,184 | $2.31M | 0.00% | −3,035−1.6% | Reduced |
| KBC Group NV | 191,837 | $2.33M | 0.01% | 00.0% | Unchanged |
| Panagora Asset Management Inc | 195,225 | $2.37M | 0.01% | +195,225 | New |
| Quantinno Capital Management LP | 200,793 | $2.44M | 0.01% | −118,866−37.2% | Reduced |