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 2025
Institutional positions in Tandem Diabetes Care Inc as of Jun 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
- 271
- −2 vs. Q1 2025
- Shares held
- 81.0M
- +7.96M (+10.9%) vs. Q1 2025
- Total value
- $1.51B
- +$107.8M (+7.7%) vs. Q1 2025
- New holders
- 40
- 117 more added
- Sold out
- 42
- 71 more reduced
2 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 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, Q2 2025
Shares, value and share of portfolio for each institution holding Tandem Diabetes Care Inc; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Jefferies Financial Group Inc. | 16,483 | $307.2K | 0.01% | +4,815+41.3% | Added |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 17,101 | $318.8K | 0.00% | +1,384+8.8% | Added |
| OP Asset Management Ltd | 17,114 | $319.0K | 0.00% | −5,886−25.6% | Reduced |
| Neuberger Berman Group LLC | 17,233 | $321.2K | 0.00% | −61−0.4% | Reduced |
| Quest Partners LLC | 17,371 | $323.8K | 0.03% | +8,810+102.9% | Added |
| Mariner, LLC | 17,741 | $330.7K | 0.00% | −4,404−19.9% | Reduced |
| Bridgefront Capital, LLC | 18,278 | $340.7K | 0.09% | +514+2.9% | Added |
| State Board of Administration of Florida Retirement System | 18,552 | $345.8K | 0.00% | 00.0% | Unchanged |
| XTX Topco Ltd | 18,793 | $350.3K | 0.01% | +18,793 | New |
| Amalgamated Bank | 18,960 | $353.0K | 0.00% | +184+1.0% | Added |
| Arizona State Retirement System | 19,408 | $361.8K | 0.00% | +595+3.2% | Added |
| Maryland State Retirement & Pension System | 19,575 | $364.9K | 0.01% | +438+2.3% | Added |
| CWM Advisors, LLC | 20,843 | $388.5K | 0.04% | +2,950+16.5% | Added |
| The PNC Financial Services Group, Inc. | 20,954 | $390.6K | 0.00% | +1,719+8.9% | Added |
| Teachers Retirement System of the State of Kentucky | 21,290 | $397.0K | 0.00% | 00.0% | Unchanged |
| State of Wyoming | 21,436 | $399.6K | 0.05% | +16,969+379.9% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 21,449 | $399.8K | 0.00% | 00.0% | Unchanged |
| Handelsbanken Fonder AB | 22,000 | $410.0K | 0.00% | 00.0% | Unchanged |
| Petrus Trust Company, LTA | 22,669 | $422.6K | 0.04% | +22,669 | New |
| Shell Asset Management Co | 22,852 | $426.0K | 0.01% | −2,429−9.6% | Reduced |
| HighMark Wealth Management LLC | 23,670 | $441.2K | 0.22% | −1,500−6.0% | Reduced |
| Captrust Financial Advisors | 24,766 | $461.6K | 0.00% | +3,249+15.1% | Added |
| Summit Trail Advisors, LLC | 24,880 | $463.8K | 0.01% | +24,880 | New |
| Ensign Peak Advisors, Inc | 24,982 | $465.7K | 0.00% | −550−2.2% | Reduced |
| Advisors Asset Management, Inc. | 25,001 | $466.0K | 0.01% | +2,541+11.3% | Added |
| Bessemer Group Inc | 25,046 | $467.0K | 0.00% | +2,537+11.3% | Added |
| Yousif Capital Management, LLC | 25,145 | $468.7K | 0.01% | +144+0.6% | Added |
| Dynamic Technology Lab Private Ltd | 26,143 | $488.0K | 0.07% | +14,377+122.2% | Added |
| Franklin Resources Inc | 26,950 | $502.3K | 0.00% | −721−2.6% | Reduced |
| SG Americas Securities, LLC | 27,760 | $517.0K | 0.00% | +11,407+69.8% | Added |
| Bayesian Capital Management, LP | 28,400 | $529.4K | 0.08% | +28,400 | New |
| Comerica Bank | 29,554 | $550.9K | 0.00% | −138−0.5% | Reduced |
| HSBC Holdings PLC | 29,742 | $554.5K | 0.00% | +15,598+110.3% | Added |
| Janus Henderson Group PLC | 29,811 | $555.8K | 0.00% | 00.0% | Unchanged |
| Campbell & CO Investment Adviser LLC | 30,108 | $561.2K | 0.04% | +30,108 | New |
| Louisiana State Employees Retirement System | 31,100 | $579.7K | 0.01% | +200+0.6% | Added |
| Assenagon Asset Management S.A. | 31,403 | $585.4K | 0.00% | +31,403 | New |
| Fox Run Management, L.L.C. | 31,516 | $587.5K | 0.10% | +31,516 | New |
| Teacher Retirement System of Texas | 31,576 | $588.6K | 0.00% | −889−2.7% | Reduced |
| Manufacturers Life Insurance Company, The | 33,201 | $618.9K | 0.00% | +408+1.2% | Added |
| Quantbot Technologies LP | 33,445 | $623.4K | 0.02% | +33,445 | New |
| US Bancorp | 35,360 | $659.1K | 0.00% | −7,328−17.2% | Reduced |
| Stifel Financial Corp | 35,529 | $662.3K | 0.00% | +234+0.7% | Added |
| Mirae Asset Global Investments Co., Ltd. | 36,060 | $672.2K | 0.00% | 00.0% | Unchanged |
| State of Tennessee, Treasury Department | 36,189 | $674.6K | 0.00% | +6,353+21.3% | Added |
| Virginia Retirement Systems Et Al | 36,900 | $687.8K | 0.00% | +8,500+29.9% | Added |
| LPL Financial LLC | 37,460 | $698.3K | 0.00% | −15,812−29.7% | Reduced |
| MetLife Investment Management | 39,091 | $728.7K | 0.00% | 00.0% | Unchanged |
| State of Alaska, Department of Revenue | 39,660 | $739.0K | 0.01% | +3,269+9.0% | Added |
| AQR Capital Management LLC | 41,004 | $764.3K | 0.00% | +28,935+239.7% | Added |
| Natixis Advisors, L.P. | 42,412 | $791.0K | 0.00% | −23,161−35.3% | Reduced |
| Brinker Capital Investments, LLC | 44,611 | $831.5K | 0.01% | −2,477−5.3% | Reduced |
| Commerce Bank | 45,102 | $840.7K | 0.00% | +13,335+42.0% | Added |
| Intech Investment Management LLC | 47,343 | $882.5K | 0.01% | −3,136−6.2% | Reduced |
| Legato Capital Management LLC | 48,185 | $898.2K | 0.11% | +48,185 | New |
| Deutsche Bank AG | 48,373 | $901.7K | 0.00% | −5,791−10.7% | Reduced |
| Thrivent Financial for Lutherans | 48,977 | $913.0K | 0.00% | +736+1.5% | Added |
| Wells Fargo & Company | 50,281 | $937.2K | 0.00% | −16,629−24.9% | Reduced |
| Beaconlight Capital, LLC | 53,455 | $996.4K | 0.58% | −166,302−75.7% | Reduced |
| Oppenheimer Asset Management Inc. | 54,041 | $1.01M | 0.01% | −18,711−25.7% | Reduced |
| Group One Trading, L.P. | 55,940 | $1.04M | 0.03% | +4,480+8.7% | Added |
| Great West Life Assurance Co | 56,332 | $1.05M | 0.00% | +3,054+5.7% | Added |
| Price T Rowe Associates Inc | 59,203 | $1.10M | 0.00% | +6,360+12.0% | Added |
| Moore Capital Management, LP | 59,726 | $1.11M | 0.02% | −44,725−42.8% | Reduced |
| California State Teachers Retirement System | 60,598 | $1.13M | 0.00% | −639−1.0% | Reduced |
| Centiva Capital, LP | 61,001 | $1.14M | 0.08% | +61,001 | New |
| Dark Forest Capital Management LP | 61,002 | $1.14M | 0.05% | −9,126−13.0% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 63,638 | $1.19M | 0.00% | −10,775−14.5% | Reduced |
| New York State Teachers Retirement System | 68,300 | $1.27M | 0.00% | +100+0.1% | Added |
| Man Group plc | 74,886 | $1.40M | 0.00% | +47,565+174.1% | Added |
| Cerity Partners LLC | 82,262 | $1.53M | 0.00% | +6,257+8.2% | Added |
| Gotham Asset Management, LLC | 82,432 | $1.54M | 0.01% | +13,803+20.1% | Added |
| Banque Pictet & Cie SA | 84,028 | $1.57M | 0.02% | +84,028 | New |
| Citigroup Inc | 87,125 | $1.62M | 0.00% | −14,064−13.9% | Reduced |
| Jane Street Group, LLC | 90,108 | $1.68M | 0.00% | +90,108 | New |
| Brevan Howard Capital Management LP | 94,734 | $1.77M | 0.02% | +83,955+778.9% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 101,346 | $1.89M | 0.00% | +13,523+15.4% | Added |
| Rice Hall James & Associates, LLC | 103,954 | $1.94M | 0.10% | −1,002−1.0% | Reduced |
| Kennedy Capital Management, Inc. | 117,702 | $2.19M | 0.05% | −69,441−37.1% | Reduced |
| HighTower Advisors, LLC | 121,460 | $2.26M | 0.00% | +54,292+80.8% | Added |
| Formula Growth Ltd | 122,096 | $2.28M | 0.86% | −1,849−1.5% | Reduced |
| Truist Financial Corp | 123,531 | $2.30M | 0.00% | −15,016−10.8% | Reduced |
| Swiss National Bank | 127,300 | $2.37M | 0.00% | 00.0% | Unchanged |
| Voya Investment Management LLC | 137,749 | $2.57M | 0.00% | +1,051+0.8% | Added |
| Mizuho Markets Americas LLC | 138,742 | $2.59M | 0.09% | +22,970+19.8% | Added |
| Raymond James Financial Inc | 143,274 | $2.67M | 0.00% | −43,354−23.2% | Reduced |
| State of Wisconsin Investment Board | 160,619 | $2.99M | 0.01% | +4,407+2.8% | Added |
| Aquatic Capital Management LLC | 162,030 | $3.02M | 0.06% | +139,382+615.4% | Added |
| Jump Financial, LLC | 162,950 | $3.04M | 0.04% | +162,950 | New |
| PDT Partners, LLC | 170,420 | $3.18M | 0.18% | +170,420 | New |
| Engineers Gate Manager LP | 170,488 | $3.18M | 0.04% | −20,417−10.7% | Reduced |
| Divisadero Street Capital Management, LP | 174,692 | $3.26M | 0.22% | 00.0% | Unchanged |
| Squarepoint Ops LLC | 180,660 | $3.37M | 0.01% | +56,777+45.8% | Added |
| Legal & General Group Plc | 184,853 | $3.45M | 0.00% | +7,866+4.4% | Added |
| SEI Investments Co | 186,731 | $3.48M | 0.00% | +62,375+50.2% | Added |
| 1492 Capital Management LLC | 188,754 | $3.52M | 1.62% | +166,308+740.9% | Added |
| FIL Ltd | 191,417 | $3.57M | 0.00% | −1,077−0.6% | Reduced |
| KBC Group NV | 191,837 | $3.58M | 0.01% | −1,971−1.0% | Reduced |
| Rhumbline Advisers | 193,219 | $3.60M | 0.00% | +14,945+8.4% | Added |
| New York State Common Retirement Fund | 197,775 | $3.69M | 0.00% | 00.0% | Unchanged |