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, Q1 2025
Institutional positions in Tandem Diabetes Care Inc as of Mar 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
- 275
- −38 vs. Q4 2024
- Shares held
- 73.1M
- +1.50M (+2.1%) vs. Q4 2024
- Total value
- $1.40B
- −$1.18B (−45.7%) vs. Q4 2024
- New holders
- 40
- 107 more added
- Sold out
- 78
- 85 more reduced
3 institutions that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2024: 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, Q1 2025
Shares, value and share of portfolio for each institution holding Tandem Diabetes Care Inc; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 11,028,712 | $211.3M | 0.00% | −669,112−5.7% | Reduced |
| Vanguard Group Inc | 7,292,169 | $139.7M | 0.00% | −147,836−2.0% | Reduced |
| Sessa Capital IM, L.P. | 4,466,307 | $85.6M | 3.53% | +4,466,307 | New |
| GW&K Investment Management, LLC | 2,863,987 | $54.9M | 0.51% | +740,499+34.9% | Added |
| ArrowMark Colorado Holdings LLC | 2,716,332 | $52.0M | 0.84% | −7,383−0.3% | Reduced |
| State Street Corp | 2,687,739 | $51.5M | 0.00% | −77,398−2.8% | Reduced |
| Hood River Capital Management LLC | 2,312,044 | $44.3M | 0.76% | +1,033,997+80.9% | Added |
| Stephens Investment Management Group LLC | 1,706,915 | $32.7M | 0.47% | +151,106+9.7% | Added |
| Paradice Investment Management LLC | 1,649,907 | $31.6M | 7.06% | +693,500+72.5% | Added |
| Geode Capital Management, LLC | 1,557,210 | $29.8M | 0.00% | +23,382+1.5% | Added |
| Jennison Associates LLC | 1,477,108 | $28.3M | 0.02% | +10,753+0.7% | Added |
| Jacobs Levy Equity Management, Inc | 1,471,569 | $28.2M | 0.11% | −189,444−11.4% | Reduced |
| Fred Alger Management, LLC | 1,454,239 | $27.9M | 0.16% | −489,117−25.2% | Reduced |
| FMR LLC | 1,437,076 | $27.5M | 0.00% | +350,234+32.2% | Added |
| Champlain Investment Partners, LLC | 1,368,888 | $26.2M | 0.19% | −10,975−0.8% | Reduced |
| Park West Asset Management LLC | 1,123,052 | $21.5M | 1.76% | −476,948−29.8% | Reduced |
| Morgan Stanley | 930,969 | $17.8M | 0.00% | +83,860+9.9% | Added |
| Brown Advisory Inc | 925,310 | $17.7M | 0.03% | +12,223+1.3% | Added |
| UBS Group AG | 835,692 | $16.0M | 0.00% | +209,342+33.4% | Added |
| Balyasny Asset Management LLC | 769,743 | $14.7M | 0.04% | +769,743 | New |
| Capital World Investors | 767,000 | $14.7M | 0.00% | 00.0% | Unchanged |
| Baillie Gifford & Co | 732,574 | $14.0M | 0.01% | −13,535−1.8% | Reduced |
| Goldman Sachs Group Inc | 712,559 | $13.7M | 0.00% | +34,069+5.0% | Added |
| Northern Trust Corp | 689,534 | $13.2M | 0.00% | −7,922−1.1% | Reduced |
| Two Sigma Advisers, LP | 679,583 | $13.0M | 0.03% | −202,200−22.9% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 644,988 | $12.4M | 0.05% | +129,926+25.2% | Added |
| Two Sigma Investments, LP | 641,442 | $12.3M | 0.03% | −219,746−25.5% | Reduced |
| Brown Capital Management LLC | 591,014 | $11.3M | 0.34% | −51,006−7.9% | Reduced |
| Charles Schwab Investment Management Inc | 570,150 | $10.9M | 0.00% | −32,171−5.3% | Reduced |
| Barclays PLC | 514,006 | $9.85M | 0.00% | +37,032+7.8% | Added |
| Soleus Capital Management, L.P. | 496,039 | $9.50M | 0.75% | +496,039 | New |
| Kingdon Capital Management, L.L.C. | 495,229 | $9.49M | 1.97% | −295,318−37.4% | Reduced |
| Bank of America Corp | 466,730 | $8.94M | 0.00% | +149,024+46.9% | Added |
| BNP Paribas Arbitrage, SA | 459,798 | $8.81M | 0.01% | +434,979+1,752.6% | Added |
| Bank of New York Mellon Corp | 407,482 | $7.81M | 0.00% | −29,210−6.7% | Reduced |
| Tudor Investment Corp Et Al | 405,292 | $7.77M | 0.07% | +236,249+139.8% | Added |
| Principal Financial Group Inc | 399,450 | $7.65M | 0.00% | +11,103+2.9% | Added |
| Ameriprise Financial Inc | 387,887 | $7.22M | 0.00% | +42,206+12.2% | Added |
| Frontier Capital Management Co LLC | 365,176 | $7.00M | 0.08% | +93,088+34.2% | Added |
| Standard Life Aberdeen plc | 356,218 | $6.83M | 0.01% | +107,354+43.1% | Added |
| Silvercrest Asset Management Group LLC | 346,095 | $6.63M | 0.05% | −470−0.1% | Reduced |
| Envestnet Asset Management Inc | 318,530 | $6.10M | 0.00% | +64,467+25.4% | Added |
| Nuveen, LLC | 308,315 | $5.91M | 0.00% | +308,315 | New |
| DAFNA Capital Management LLC | 294,208 | $5.64M | 1.60% | +71,000+31.8% | Added |
| Renaissance Technologies LLC | 286,127 | $5.48M | 0.01% | −29,600−9.4% | Reduced |
| Edmond de Rothschild Holding S.A. | 252,600 | $4.84M | 0.09% | +252,600 | New |
| First Light Asset Management, LLC | 245,257 | $4.70M | 0.54% | −46,860−16.0% | Reduced |
| Quantinno Capital Management LP | 241,831 | $4.63M | 0.03% | +190,219+368.6% | Added |
| Invesco Ltd. | 237,122 | $4.54M | 0.00% | +32,232+15.7% | Added |
| JPMorgan Chase & Co | 233,765 | $4.48M | 0.00% | −158,821−40.5% | Reduced |
| Acadian Asset Management LLC | 232,872 | $4.46M | 0.01% | +232,872 | New |
| Millennium Management LLC | 227,585 | $4.36M | 0.00% | +76,245+50.4% | Added |
| Beaconlight Capital, LLC | 219,757 | $4.21M | 2.88% | −111,452−33.7% | Reduced |
| Royal Bank of Canada | 211,666 | $4.05M | 0.00% | +49,408+30.5% | Added |
| Algert Global LLC | 209,320 | $4.01M | 0.10% | +119,784+133.8% | Added |
| Public Sector Pension Investment Board | 208,231 | $3.99M | 0.02% | +44,209+27.0% | Added |
| Prudential Financial Inc | 172,064 | $3.82M | 0.01% | −2,820−1.6% | Reduced |
| New York State Common Retirement Fund | 197,775 | $3.79M | 0.01% | −14,391−6.8% | Reduced |
| UBS Asset Management Americas Inc | 193,993 | $3.72M | 0.00% | +16,254+9.1% | Added |
| KBC Group NV | 193,808 | $3.71M | 0.01% | +1,329+0.7% | Added |
| FIL Ltd | 192,494 | $3.69M | 0.00% | −8,882−4.4% | Reduced |
| Engineers Gate Manager LP | 190,905 | $3.66M | 0.06% | −31,900−14.3% | Reduced |
| Kennedy Capital Management, Inc. | 187,143 | $3.59M | 0.09% | −80,212−30.0% | Reduced |
| Raymond James Financial Inc | 186,628 | $3.58M | 0.00% | +23,014+14.1% | Added |
| Susquehanna International Group, LLP | 182,251 | $3.49M | 0.01% | +152,181+506.1% | Added |
| Alliancebernstein L.P. | 180,708 | $3.46M | 0.00% | +86,901+92.6% | Added |
| Sector Gamma AS | 180,523 | $3.46M | 1.11% | +180,523 | New |
| Rhumbline Advisers | 178,274 | $3.42M | 0.00% | −432−0.2% | Reduced |
| Legal & General Group Plc | 176,987 | $3.39M | 0.00% | −5,668−3.1% | Reduced |
| Divisadero Street Capital Management, LP | 174,692 | $3.35M | 0.38% | −185,540−51.5% | Reduced |
| iA Global Asset Management Inc. | 165,380 | $3.17M | 0.05% | +165,380 | New |
| State of Wisconsin Investment Board | 156,212 | $2.99M | 0.01% | +13,750+9.7% | Added |
| Polar Capital Holdings Plc | 140,536 | $2.69M | 0.02% | −2,364−1.7% | Reduced |
| Russell Investments Group, Ltd. | 139,094 | $2.67M | 0.00% | −151,134−52.1% | Reduced |
| Truist Financial Corp | 138,547 | $2.65M | 0.00% | +18,986+15.9% | Added |
| Voya Investment Management LLC | 136,698 | $2.62M | 0.00% | +38,519+39.2% | Added |
| Gsa Capital Partners LLP | 130,595 | $2.50M | 0.23% | +130,595 | New |
| Swiss National Bank | 127,300 | $2.44M | 0.00% | −1,400−1.1% | Reduced |
| SEI Investments Co | 124,356 | $2.38M | 0.00% | +549+0.4% | Added |
| Formula Growth Ltd | 123,945 | $2.37M | 0.96% | −2,020−1.6% | Reduced |
| Squarepoint Ops LLC | 123,883 | $2.37M | 0.01% | +60,564+95.6% | Added |
| Mizuho Markets Americas LLC | 115,772 | $2.22M | 0.05% | +30,680+36.1% | Added |
| Citadel Advisors LLC | 114,034 | $2.18M | 0.00% | −17,792−13.5% | Reduced |
| Rice Hall James & Associates, LLC | 104,956 | $2.01M | 0.12% | −526−0.5% | Reduced |
| Moore Capital Management, LP | 104,451 | $2.00M | 0.07% | +83,453+397.4% | Added |
| Citigroup Inc | 101,189 | $1.94M | 0.00% | +5,976+6.3% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 87,823 | $1.68M | 0.00% | +87,823 | New |
| Jupiter Asset Management Ltd | 87,815 | $1.68M | 0.02% | +87,815 | New |
| Mangrove Partners | 82,428 | $1.58M | 0.18% | +33,687+69.1% | Added |
| Cerity Partners LLC | 76,005 | $1.46M | 0.00% | +18,529+32.2% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 74,413 | $1.43M | 0.00% | +2,096+2.9% | Added |
| Oppenheimer Asset Management Inc. | 72,752 | $1.39M | 0.02% | +11,048+17.9% | Added |
| Marshall Wace, LLP | 70,399 | $1.35M | 0.00% | −880,549−92.6% | Reduced |
| Dark Forest Capital Management LP | 70,128 | $1.34M | 0.06% | +70,128 | New |
| Gotham Asset Management, LLC | 68,629 | $1.31M | 0.01% | −47,247−40.8% | Reduced |
| New York State Teachers Retirement System | 68,200 | $1.31M | 0.00% | 00.0% | Unchanged |
| HighTower Advisors, LLC | 67,168 | $1.29M | 0.00% | +57,635+604.6% | Added |
| Wells Fargo & Company | 66,910 | $1.28M | 0.00% | +5,655+9.2% | Added |
| Natixis Advisors, L.P. | 65,573 | $1.26M | 0.00% | −105−0.2% | Reduced |
| Hussman Strategic Advisors, Inc. | 63,000 | $1.21M | 0.29% | +63,000 | New |