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 |
|---|---|---|---|---|---|
| Cerity Partners LLC | 82,262 | $1.53M | 0.00% | +6,257+8.2% | Added |
| Man Group plc | 74,886 | $1.40M | 0.00% | +47,565+174.1% | Added |
| New York State Teachers Retirement System | 68,300 | $1.27M | 0.00% | +100+0.1% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 63,638 | $1.19M | 0.00% | −10,775−14.5% | Reduced |
| Dark Forest Capital Management LP | 61,002 | $1.14M | 0.05% | −9,126−13.0% | Reduced |
| Centiva Capital, LP | 61,001 | $1.14M | 0.08% | +61,001 | New |
| California State Teachers Retirement System | 60,598 | $1.13M | 0.00% | −639−1.0% | Reduced |
| Moore Capital Management, LP | 59,726 | $1.11M | 0.02% | −44,725−42.8% | Reduced |
| Price T Rowe Associates Inc | 59,203 | $1.10M | 0.00% | +6,360+12.0% | Added |
| Great West Life Assurance Co | 56,332 | $1.05M | 0.00% | +3,054+5.7% | Added |
| Group One Trading, L.P. | 55,940 | $1.04M | 0.03% | +4,480+8.7% | Added |
| Oppenheimer Asset Management Inc. | 54,041 | $1.01M | 0.01% | −18,711−25.7% | Reduced |
| Beaconlight Capital, LLC | 53,455 | $996.4K | 0.58% | −166,302−75.7% | Reduced |
| Wells Fargo & Company | 50,281 | $937.2K | 0.00% | −16,629−24.9% | Reduced |
| Thrivent Financial for Lutherans | 48,977 | $913.0K | 0.00% | +736+1.5% | Added |
| Deutsche Bank AG | 48,373 | $901.7K | 0.00% | −5,791−10.7% | Reduced |
| Legato Capital Management LLC | 48,185 | $898.2K | 0.11% | +48,185 | New |
| Intech Investment Management LLC | 47,343 | $882.5K | 0.01% | −3,136−6.2% | Reduced |
| Commerce Bank | 45,102 | $840.7K | 0.00% | +13,335+42.0% | Added |
| Brinker Capital Investments, LLC | 44,611 | $831.5K | 0.01% | −2,477−5.3% | Reduced |
| Natixis Advisors, L.P. | 42,412 | $791.0K | 0.00% | −23,161−35.3% | Reduced |
| AQR Capital Management LLC | 41,004 | $764.3K | 0.00% | +28,935+239.7% | Added |
| State of Alaska, Department of Revenue | 39,660 | $739.0K | 0.01% | +3,269+9.0% | Added |
| MetLife Investment Management | 39,091 | $728.7K | 0.00% | 00.0% | Unchanged |
| LPL Financial LLC | 37,460 | $698.3K | 0.00% | −15,812−29.7% | Reduced |
| Virginia Retirement Systems Et Al | 36,900 | $687.8K | 0.00% | +8,500+29.9% | Added |
| State of Tennessee, Treasury Department | 36,189 | $674.6K | 0.00% | +6,353+21.3% | Added |
| Mirae Asset Global Investments Co., Ltd. | 36,060 | $672.2K | 0.00% | 00.0% | Unchanged |
| Stifel Financial Corp | 35,529 | $662.3K | 0.00% | +234+0.7% | Added |
| US Bancorp | 35,360 | $659.1K | 0.00% | −7,328−17.2% | Reduced |
| Quantbot Technologies LP | 33,445 | $623.4K | 0.02% | +33,445 | New |
| Manufacturers Life Insurance Company, The | 33,201 | $618.9K | 0.00% | +408+1.2% | Added |
| Teacher Retirement System of Texas | 31,576 | $588.6K | 0.00% | −889−2.7% | Reduced |
| Fox Run Management, L.L.C. | 31,516 | $587.5K | 0.10% | +31,516 | New |
| Assenagon Asset Management S.A. | 31,403 | $585.4K | 0.00% | +31,403 | New |
| Louisiana State Employees Retirement System | 31,100 | $579.7K | 0.01% | +200+0.6% | Added |
| Campbell & CO Investment Adviser LLC | 30,108 | $561.2K | 0.04% | +30,108 | New |
| Janus Henderson Group PLC | 29,811 | $555.8K | 0.00% | 00.0% | Unchanged |
| HSBC Holdings PLC | 29,742 | $554.5K | 0.00% | +15,598+110.3% | Added |
| Comerica Bank | 29,554 | $550.9K | 0.00% | −138−0.5% | Reduced |
| Bayesian Capital Management, LP | 28,400 | $529.4K | 0.08% | +28,400 | New |
| SG Americas Securities, LLC | 27,760 | $517.0K | 0.00% | +11,407+69.8% | Added |
| Franklin Resources Inc | 26,950 | $502.3K | 0.00% | −721−2.6% | Reduced |
| Dynamic Technology Lab Private Ltd | 26,143 | $488.0K | 0.07% | +14,377+122.2% | Added |
| Yousif Capital Management, LLC | 25,145 | $468.7K | 0.01% | +144+0.6% | Added |
| Bessemer Group Inc | 25,046 | $467.0K | 0.00% | +2,537+11.3% | Added |
| Advisors Asset Management, Inc. | 25,001 | $466.0K | 0.01% | +2,541+11.3% | Added |
| Ensign Peak Advisors, Inc | 24,982 | $465.7K | 0.00% | −550−2.2% | Reduced |
| Summit Trail Advisors, LLC | 24,880 | $463.8K | 0.01% | +24,880 | New |
| Captrust Financial Advisors | 24,766 | $461.6K | 0.00% | +3,249+15.1% | Added |
| HighMark Wealth Management LLC | 23,670 | $441.2K | 0.22% | −1,500−6.0% | Reduced |
| Shell Asset Management Co | 22,852 | $426.0K | 0.01% | −2,429−9.6% | Reduced |
| Petrus Trust Company, LTA | 22,669 | $422.6K | 0.04% | +22,669 | New |
| Handelsbanken Fonder AB | 22,000 | $410.0K | 0.00% | 00.0% | Unchanged |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 21,449 | $399.8K | 0.00% | 00.0% | Unchanged |
| State of Wyoming | 21,436 | $399.6K | 0.05% | +16,969+379.9% | Added |
| Teachers Retirement System of the State of Kentucky | 21,290 | $397.0K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 20,954 | $390.6K | 0.00% | +1,719+8.9% | Added |
| CWM Advisors, LLC | 20,843 | $388.5K | 0.04% | +2,950+16.5% | Added |
| Maryland State Retirement & Pension System | 19,575 | $364.9K | 0.01% | +438+2.3% | Added |
| Arizona State Retirement System | 19,408 | $361.8K | 0.00% | +595+3.2% | Added |
| Amalgamated Bank | 18,960 | $353.0K | 0.00% | +184+1.0% | Added |
| XTX Topco Ltd | 18,793 | $350.3K | 0.01% | +18,793 | New |
| State Board of Administration of Florida Retirement System | 18,552 | $345.8K | 0.00% | 00.0% | Unchanged |
| Bridgefront Capital, LLC | 18,278 | $340.7K | 0.09% | +514+2.9% | Added |
| Mariner, LLC | 17,741 | $330.7K | 0.00% | −4,404−19.9% | Reduced |
| Quest Partners LLC | 17,371 | $323.8K | 0.03% | +8,810+102.9% | Added |
| Neuberger Berman Group LLC | 17,233 | $321.2K | 0.00% | −61−0.4% | Reduced |
| OP Asset Management Ltd | 17,114 | $319.0K | 0.00% | −5,886−25.6% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 17,101 | $318.8K | 0.00% | +1,384+8.8% | Added |
| Jefferies Financial Group Inc. | 16,483 | $307.2K | 0.01% | +4,815+41.3% | Added |
| Diversified Trust Co | 16,348 | $304.7K | 0.01% | +1,725+11.8% | Added |
| Police & Firemen's Retirement System of New Jersey | 15,299 | $285.2K | 0.00% | +1,399+10.1% | Added |
| Oregon Public Employees Retirement Fund | 15,271 | $284.7K | 0.01% | +300+2.0% | Added |
| ProShare Advisors LLC | 14,919 | $278.1K | 0.00% | −545−3.5% | Reduced |
| Cetera Investment Advisers | 14,723 | $274.4K | 0.00% | −3,977−21.3% | Reduced |
| KLP Kapitalforvaltning AS | 13,500 | $251.6K | 0.00% | 00.0% | Unchanged |
| Corton Capital Inc. | 13,038 | $243.0K | 0.28% | +13,038 | New |
| Arrowstreet Capital, Limited Partnership | 12,411 | $231.3K | 0.00% | +12,411 | New |
| Natixis | 12,200 | $227.4K | 0.00% | +12,200 | New |
| Victory Capital Management Inc | 12,160 | $226.7K | 0.00% | −85−0.7% | Reduced |
| Davy Global Fund Management Ltd | 11,851 | $220.9K | 0.02% | 00.0% | Unchanged |
| CI Private Wealth, LLC | 11,800 | $220.0K | 0.00% | +531+4.7% | Added |
| Apollon Wealth Management, LLC | 11,366 | $211.9K | 0.00% | +292+2.6% | Added |
| Park Avenue Securities LLC | 10,938 | $204.0K | 0.00% | −770−6.6% | Reduced |
| Simplex Trading, LLC | 10,434 | $194.0K | 0.01% | +8,931+594.2% | Added |
| Virtu Financial LLC | 10,138 | $189.0K | 0.01% | +10,138 | New |
| Amundi | 11,022 | $188.3K | 0.00% | −14,162−56.2% | Reduced |
| Advisory Services Network, LLC | 11,461 | $178.6K | 0.00% | +11,461 | New |
| Advisor Group Holdings, Inc. | 9,279 | $172.9K | 0.00% | +145+1.6% | Added |
| Bayforest Capital Ltd | 9,271 | $172.8K | 0.08% | −17,017−64.7% | Reduced |
| Tower Research Capital LLC (TRC) | 9,168 | $170.9K | 0.00% | +6,290+218.6% | Added |
| Public Employees Retirement Association of Colorado | 7,650 | $143.0K | 0.00% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 6,870 | $128.1K | 0.00% | 00.0% | Unchanged |
| Van Eck Associates Corp | 6,541 | $122.0K | 0.00% | −857−11.6% | Reduced |
| Clear Street Markets LLC | 6,160 | $114.8K | 0.04% | +6,160 | New |
| Walleye Trading LLC | 6,143 | $114.5K | 0.00% | +6,143 | New |
| Leonteq Securities AG | 5,891 | $109.8K | 0.01% | −957−14.0% | Reduced |
| Skopos Labs, Inc. | 4,733 | $88.2K | 0.01% | +1,336+39.3% | Added |
| Nisa Investment Advisors, LLC | 4,171 | $77.7K | 0.00% | +2,717+186.9% | Added |