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 2024
Institutional positions in Tandem Diabetes Care Inc as of Mar 31, 2024. 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
- 291
- +25 vs. Q4 2023
- Shares held
- 74.1M
- +3.31M (+4.7%) vs. Q4 2023
- Total value
- $2.63B
- +$531.0M (+25.3%) vs. Q4 2023
- New holders
- 54
- 123 more added
- Sold out
- 29
- 78 more reduced
2 institutions that held it in Q4 2023 haven't filed for Q1 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2023: 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 2024
Shares, value and share of portfolio for each institution holding Tandem Diabetes Care Inc; share changes are against Q4 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock Inc. | 9,232,481 | $326.9M | 0.01% | −13,172−0.1% | Reduced |
| Vanguard Group Inc | 7,052,570 | $249.7M | 0.00% | +30,664+0.4% | Added |
| Capital World Investors | 3,665,300 | $129.8M | 0.02% | −2,718,811−42.6% | Reduced |
| Marshall Wace, LLP | 3,120,374 | $110.5M | 0.18% | +2,768,459+786.7% | Added |
| ArrowMark Colorado Holdings LLC | 2,934,179 | $103.9M | 1.18% | −8240.0% | Reduced |
| Jennison Associates LLC | 2,556,124 | $90.5M | 0.06% | +1,265,534+98.1% | Added |
| State Street Corp | 2,240,978 | $79.4M | 0.00% | −33,588−1.5% | Reduced |
| Janus Henderson Group PLC | 2,200,797 | $77.9M | 0.04% | −376,945−14.6% | Reduced |
| Bellevue Group AG | 2,031,888 | $71.9M | 1.10% | +39,571+2.0% | Added |
| Champlain Investment Partners, LLC | 1,513,557 | $53.6M | 0.31% | −16,275−1.1% | Reduced |
| Fred Alger Management, LLC | 1,497,071 | $53.0M | 0.26% | +1,194,292+394.4% | Added |
| Morgan Stanley | 1,398,145 | $49.5M | 0.00% | +525,980+60.3% | Added |
| Park West Asset Management LLC | 1,397,280 | $49.5M | 3.71% | +1,397,280 | New |
| Driehaus Capital Management LLC | 1,317,437 | $46.7M | 0.46% | +1,317,437 | New |
| GW&K Investment Management, LLC | 1,305,909 | $46.2M | 0.41% | +79,151+6.5% | Added |
| Jacobs Levy Equity Management, Inc | 1,219,194 | $43.2M | 0.19% | −71,773−5.6% | Reduced |
| Two Sigma Advisers, LP | 1,076,883 | $38.1M | 0.09% | +75,300+7.5% | Added |
| Geode Capital Management, LLC | 1,076,097 | $38.1M | 0.00% | +36,410+3.5% | Added |
| FMR LLC | 1,050,345 | $37.2M | 0.00% | −1,926,929−64.7% | Reduced |
| Millennium Management LLC | 1,024,954 | $36.3M | 0.03% | +394,111+62.5% | Added |
| Two Sigma Investments, LP | 1,021,993 | $36.2M | 0.09% | +320,639+45.7% | Added |
| Capital International Investors | 1,017,195 | $36.0M | 0.01% | −66,366−6.1% | Reduced |
| Stephens Investment Management Group LLC | 962,559 | $34.1M | 0.45% | +2870.0% | Added |
| Brown Capital Management LLC | 954,567 | $33.8M | 0.60% | +219,940+29.9% | Added |
| Gilder Gagnon Howe & Co LLC | 897,388 | $31.8M | 0.40% | +879,312+4,864.5% | Added |
| Next Century Growth Investors LLC | 852,879 | $30.2M | 2.62% | +391,384+84.8% | Added |
| Paradice Investment Management LLC | 821,993 | $29.1M | 5.05% | −259,893−24.0% | Reduced |
| Ameriprise Financial Inc | 792,028 | $28.1M | 0.01% | +478,474+152.6% | Added |
| Chicago Capital, LLC | 671,305 | $23.8M | 0.72% | +194,368+40.8% | Added |
| Renaissance Technologies LLC | 594,327 | $21.0M | 0.03% | +576,100+3,160.7% | Added |
| Citadel Advisors LLC | 567,068 | $20.1M | 0.02% | +206,355+57.2% | Added |
| Bank of America Corp | 536,171 | $19.0M | 0.00% | +453,299+547.0% | Added |
| Voloridge Investment Management, LLC | 521,632 | $18.5M | 0.07% | −430,930−45.2% | Reduced |
| Kingdon Capital Management, L.L.C. | 493,080 | $17.5M | 2.31% | +298,880+153.9% | Added |
| First Light Asset Management, LLC | 475,077 | $16.8M | 1.29% | +114,834+31.9% | Added |
| Bank of New York Mellon Corp | 420,916 | $14.9M | 0.00% | −24,642−5.5% | Reduced |
| Charles Schwab Investment Management Inc | 417,543 | $14.8M | 0.00% | +20,802+5.2% | Added |
| Squarepoint Ops LLC | 413,959 | $14.7M | 0.06% | −42,561−9.3% | Reduced |
| Principal Financial Group Inc | 356,393 | $12.6M | 0.01% | +12,044+3.5% | Added |
| First Trust Advisors LP | 342,870 | $12.1M | 0.01% | +342,870 | New |
| Northern Trust Corp | 342,525 | $12.1M | 0.00% | −8,299−2.4% | Reduced |
| Cubist Systematic Strategies, LLC | 339,918 | $12.0M | 0.14% | +339,918 | New |
| Tri Locum Partners LP | 326,506 | $11.6M | 4.01% | +326,506 | New |
| New York State Common Retirement Fund | 309,902 | $11.0M | 0.01% | −5,600−1.8% | Reduced |
| Jane Street Group, LLC | 308,099 | $10.9M | 0.01% | +117,408+61.6% | Added |
| Silvercrest Asset Management Group LLC | 266,158 | $9.42M | 0.06% | +10,907+4.3% | Added |
| Baillie Gifford & Co | 259,697 | $9.20M | 0.01% | −2,946−1.1% | Reduced |
| DAFNA Capital Management LLC | 258,208 | $9.14M | 2.08% | +37,500+17.0% | Added |
| Invesco Ltd. | 252,932 | $8.96M | 0.00% | +7,245+2.9% | Added |
| Beaconlight Capital, LLC | 247,186 | $8.75M | 3.93% | +180,859+272.7% | Added |
| Russell Investments Group, Ltd. | 243,663 | $8.63M | 0.01% | −3,662−1.5% | Reduced |
| KBC Group NV | 239,944 | $8.50M | 0.03% | 00.0% | Unchanged |
| Balyasny Asset Management LLC | 234,520 | $8.30M | 0.02% | +128,111+120.4% | Added |
| Trexquant Investment LP | 233,083 | $8.25M | 0.16% | +71,129+43.9% | Added |
| Envestnet Asset Management Inc | 232,010 | $8.22M | 0.00% | +46,870+25.3% | Added |
| Assenagon Asset Management S.A. | 226,427 | $8.02M | 0.02% | +226,427 | New |
| Integral Health Asset Management, LLC | 225,000 | $7.97M | 0.78% | +225,000 | New |
| Banque Pictet & Cie SA | 208,867 | $7.40M | 0.08% | +10,541+5.3% | Added |
| Frontier Capital Management Co LLC | 184,338 | $6.53M | 0.06% | +38,429+26.3% | Added |
| Legal & General Group Plc | 180,581 | $6.39M | 0.00% | −786−0.4% | Reduced |
| Lisanti Capital Growth, LLC | 174,830 | $6.19M | 1.51% | +68,935+65.1% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 171,367 | $6.07M | 0.03% | −12,955−7.0% | Reduced |
| Rhumbline Advisers | 161,397 | $5.72M | 0.01% | −10,684−6.2% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 139,485 | $5.42M | 0.01% | +8,627+6.6% | Added |
| Susquehanna International Group, LLP | 152,240 | $5.39M | 0.01% | +38,464+33.8% | Added |
| SG Americas Securities, LLC | 147,612 | $5.23M | 0.03% | +147,612 | New |
| BNP Paribas Arbitrage, SA | 145,812 | $5.16M | 0.01% | +136,592+1,481.5% | Added |
| Nuveen Asset Management, LLC | 143,928 | $5.10M | 0.00% | −1,173−0.8% | Reduced |
| Prudential Financial Inc | 142,583 | $5.05M | 0.01% | +33,620+30.9% | Added |
| Public Sector Pension Investment Board | 133,660 | $4.73M | 0.03% | −1,390−1.0% | Reduced |
| Swiss National Bank | 128,200 | $4.54M | 0.00% | 00.0% | Unchanged |
| Formula Growth Ltd | 123,746 | $4.38M | 1.40% | +83,000+203.7% | Added |
| Gotham Asset Management, LLC | 123,252 | $4.36M | 0.07% | +47,979+63.7% | Added |
| Goldman Sachs Group Inc | 118,837 | $4.21M | 0.00% | −106,888−47.4% | Reduced |
| Adage Capital Partners GP, L.L.C. | 118,709 | $4.20M | 0.01% | +118,709 | New |
| Skandinaviska Enskilda Banken AB (publ) | 118,221 | $4.19M | 0.02% | 00.0% | Unchanged |
| Truist Financial Corp | 113,527 | $4.02M | 0.01% | +26,043+29.8% | Added |
| Holocene Advisors, LP | 104,080 | $3.69M | 0.01% | +104,080 | New |
| UBS Asset Management Americas Inc | 103,779 | $3.67M | 0.00% | +11,309+12.2% | Added |
| State of Wisconsin Investment Board | 103,257 | $3.66M | 0.01% | −12,751−11.0% | Reduced |
| Raymond James & Associates | 96,848 | $3.43M | 0.00% | +4,863+5.3% | Added |
| HRT Financial LP | 96,300 | $3.41M | 0.02% | +28,981+43.1% | Added |
| Rice Hall James & Associates, LLC | 94,140 | $3.33M | 0.19% | −10,290−9.9% | Reduced |
| JPMorgan Chase & Co | 93,662 | $3.32M | 0.00% | +7,237+8.4% | Added |
| Credit Suisse AG | 90,763 | $3.21M | 0.00% | +1,623+1.8% | Added |
| Alliancebernstein L.P. | 87,939 | $3.11M | 0.00% | −55,779−38.8% | Reduced |
| Engineers Gate Manager LP | 84,947 | $3.01M | 0.08% | +84,947 | New |
| Royal Bank of Canada | 83,322 | $2.95M | 0.00% | +14,915+21.8% | Added |
| Jump Financial, LLC | 80,067 | $2.84M | 0.08% | +40,967+104.8% | Added |
| Great West Life Assurance Co | 79,642 | $2.82M | 0.01% | −1,238−1.5% | Reduced |
| State Board of Administration of Florida Retirement System | 68,179 | $2.77M | 0.01% | +2,654+4.1% | Added |
| Tudor Investment Corp Et Al | 77,335 | $2.74M | 0.03% | −154,403−66.6% | Reduced |
| Citigroup Inc | 76,843 | $2.72M | 0.00% | +33,865+78.8% | Added |
| Prelude Capital Management, LLC | 76,030 | $2.69M | 0.18% | +68,105+859.4% | Added |
| D. E. Shaw & Co., Inc. | 71,432 | $2.53M | 0.00% | −21,708−23.3% | Reduced |
| New York State Teachers Retirement System | 70,000 | $2.48M | 0.01% | 00.0% | Unchanged |
| Schonfeld Strategic Advisors LLC | 66,680 | $2.36M | 0.02% | +11,962+21.9% | Added |
| California State Teachers Retirement System | 65,189 | $2.31M | 0.00% | −3,472−5.1% | Reduced |
| Capital Fund Management S.A. | 61,870 | $2.19M | 0.03% | +61,870 | New |
| Amundi | 68,348 | $2.11M | 0.00% | +68,348 | New |