Tandem Diabetes CareTNDM
13F holders, Q4 2025 (December 31)269holders +14
46new positions
32sold out
5famous investors
$21.98avg. 13F price*
At the end of Q4 2025, 269 institutions reported holding Tandem Diabetes Care Inc. (TNDM) in their 13F filings, up 14 from Q3 2025. 46 opened new positions and 32 sold out. The largest holders were BlackRock, Inc. ($245.1M), Vanguard Group Inc. ($161.4M) and Sessa Capital IM, L.P. ($109.9M). 5 famous investors held it, including Ken Griffin (0.0% of Citadel Advisors's portfolio), David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio) and Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio).
- Company
- Tandem Diabetes Care Inc.
- CUSIP
- 875372203
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 46 | $138.5M |
| Exits | 32 | $59.6M |
All 13F filers, Q3 2025 → Q4 2025: 13,154,385 shares bought and 12,695,510 shares sold, net +458,875 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 269 holders
| BlackRock, Inc. | 0.00% | Reduce -7.9% | 11,149,181 | $245.1M |
| Vanguard Group Inc. | 0.00% | Add +3.9% | 7,341,356 | $161.4M |
| Sessa Capital IM, L.P. | 2.18% | No change | 5,000,000 | $109.9M |
| ArrowMark Colorado Holdings LLC | 1.40% | Reduce -21.7% | 2,889,691 | $63.5M |
| GW&K Investment Management, LLC | 0.51% | Reduce -1.7% | 2,675,157 | $58.8M |
| State Street Corp. | 0.00% | Reduce -1.0% | 2,641,724 | $58.1M |
| Citadel Advisors | 0.03% | Add +5147.6% | 2,088,603 | $45.9M |
| Morgan Stanley | 0.00% | Add +182.1% | 2,080,497 | $45.7M |
| Paradice Investment Management LLC | 8.89% | Reduce -5.4% | 2,077,745 | $45.7M |
| Jennison Associates LLC | 0.03% | Add +42.3% | 2,021,376 | $44.4M |
| Goldman Sachs Group Inc. | 0.01% | Add +17.6% | 1,683,400 | $37.0M |
| Jacobs Levy Equity Management, Inc. | 0.14% | Add +11.6% | 1,653,708 | $36.3M |
| Geode Capital Management, LLC | 0.00% | Add +3.2% | 1,649,383 | $36.3M |
| Driehaus Capital Management LLC | 0.24% | New | 1,610,342 | $35.4M |
| Freestone Grove Partners LP | 0.23% | Reduce -22.9% | 1,442,836 | $31.7M |
| BNP Paribas Financial Markets | 0.02% | Add +468.5% | 1,248,481 | $27.4M |
| Assenagon Asset Management S.A. | 0.04% | New | 1,227,856 | $27.0M |
| Two Sigma Investments, LP | 0.04% | Add +7.5% | 1,201,527 | $26.4M |
| Baillie Gifford & Co. | 0.02% | Add +2.2% | 1,145,516 | $25.2M |
| First Light Asset Management, LLC | 1.83% | New | 1,089,493 | $23.9M |
| Two Sigma Advisers, LP | 0.04% | Reduce -3.4% | 937,983 | $20.6M |
| Barclays PLC | 0.01% | Reduce -22.9% | 917,927 | $20.2M |
| Marshall Wace, LLP | 0.02% | New | 875,531 | $19.2M |
| D. E. Shaw & Co. | 0.02% | Reduce -2.6% | 854,266 | $18.8M |
| Bank of America Corp. | 0.00% | Add +6.7% | 702,503 | $15.4M |
| Northern Trust Corp. | 0.00% | Add +0.1% | 691,693 | $15.2M |
| FMR LLC | 0.00% | Reduce -22.7% | 672,647 | $14.8M |
| Royce & Associates LP | 0.14% | Add +27.5% | 650,250 | $14.3M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +15.7% | 646,310 | $14.2M |
| Millennium Management | 0.01% | Reduce -17.3% | 583,573 | $12.8M |
| Nuveen, LLC | 0.00% | Add +12.1% | 563,274 | $12.4M |
| Aberdeen Group plc | 0.02% | Reduce -8.5% | 547,035 | $12.0M |
| UBS Group AG | 0.00% | Reduce -72.2% | 417,833 | $9.2M |
| Frontier Capital Management Co. LLC | 0.10% | Reduce -0.7% | 412,269 | $9.1M |
| Acadian Asset Management LLC | 0.01% | Reduce -57.3% | 392,763 | $8.6M |
| DAFNA Capital Management LLC | 1.84% | No change | 355,208 | $7.8M |
| Bank of New York Mellon Corp | 0.00% | Reduce -8.9% | 349,753 | $7.7M |
| JPMorgan Chase & Co. | 0.00% | Reduce -4.9% | 341,631 | $7.5M |
| AQR Capital Management | 0.00% | Reduce -18.2% | 339,579 | $7.5M |
| Principal Financial Group Inc. | 0.00% | Reduce -0.8% | 324,262 | $7.1M |
| Voya Investment Management LLC | 0.01% | Add +83.5% | 319,528 | $7.0M |
| Quantinno Capital Management LP | 0.01% | Add +45.7% | 292,509 | $6.4M |
| Invesco Ltd. | 0.00% | Reduce -8.1% | 277,722 | $6.1M |
| Sector Gamma As | 1.34% | Reduce -0.9% | 267,091 | $5.9M |
| Lisanti Capital Growth, LLC | 1.37% | New | 262,885 | $5.8M |
| Balyasny Asset Management L.P. | 0.01% | New | 262,788 | $5.8M |
| Edmond DE Rothschild Holding S.A. | 0.08% | Reduce -22.5% | 258,200 | $5.7M |
| Public Sector Pension Investment Board | 0.02% | Reduce -11.0% | 234,673 | $5.2M |
| Alliancebernstein L.P. | 0.00% | Add +4.7% | 234,293 | $5.1M |
| Envestnet Asset Management Inc. | 0.00% | Reduce -6.2% | 221,654 | $4.9M |
| Jane Street Group, LLC | 0.01% | Reduce -3.4% | 209,975 | $4.6M |
| Royal Bank of Canada | 0.00% | Reduce -69.4% | 208,528 | $4.6M |
| Rhumbline Advisers | 0.00% | Reduce -3.1% | 184,219 | $4.0M |
| Adage Capital Partners Gp, L.L.C. | 0.01% | New | 182,995 | $4.0M |
| Canada Pension Plan Investment Board | 0.00% | No change | 177,600 | $3.9M |
| Legal & General Group Plc | 0.00% | Reduce -5.8% | 171,861 | $3.8M |
| HRT Financial LP | 0.01% | Add +92.1% | 170,480 | $3.7M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -10.8% | 164,902 | $3.6M |
| Panagora Asset Management Inc. | 0.01% | Reduce -25.1% | 146,234 | $3.2M |
| Mizuho Markets Americas LLC | 0.07% | Add +23.2% | 144,617 | $3.2M |
| Arrowstreet Capital, Limited Partnership | 0.00% | New | 135,753 | $3.0M |
| Swiss National Bank | 0.00% | Add +3.3% | 133,300 | $2.9M |
| Susquehanna International Group, LLP | 0.00% | Reduce -25.6% | 130,321 | $2.9M |
| Ameriprise Financial Inc. | 0.00% | Reduce -23.7% | 128,720 | $2.8M |
| Russell Investments Group, Ltd. | 0.00% | Reduce -6.5% | 128,660 | $2.8M |
| Raymond James Financial Inc. | 0.00% | Reduce -12.2% | 120,169 | $2.6M |
| PDT Partners, LLC | 0.16% | Reduce -35.2% | 110,385 | $2.4M |
| Algert Global LLC | 0.04% | Reduce -52.0% | 108,939 | $2.4M |
| Tudor Investment Corporation | 0.01% | New | 108,063 | $2.4M |
| Sei Investments Co. | 0.00% | Reduce -50.6% | 106,598 | $2.3M |
| Trexquant Investment LP | 0.02% | Reduce -79.4% | 102,719 | $2.3M |
| Wellington Management Group LLP | 0.00% | New | 98,309 | $2.2M |
| Banque Pictet & Cie SA | 0.02% | Add +29.6% | 97,187 | $2.1M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | Reduce -9.4% | 89,094 | $2.0M |
| Engineers Gate Manager LP | 0.02% | New | 88,547 | $1.9M |
| Wells Fargo & Company | 0.00% | Add +61.8% | 84,411 | $1.9M |
| Y-Intercept (Hong Kong) Ltd | 0.04% | Add +47.5% | 83,986 | $1.8M |
| Cerity Partners LLC | 0.00% | Add +0.6% | 76,771 | $1.7M |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.00% | Add +245.1% | 74,015 | $1.6M |
| Legato Capital Management LLC | 0.14% | New | 72,580 | $1.6M |
| Formula Growth Ltd. | 0.60% | Reduce -41.9% | 70,919 | $1.6M |
| New York State Teachers Retirement System | 0.00% | No change | 68,300 | $1.5M |
| Susquehanna Portfolio Strategies, LLC | 0.02% | Reduce -67.8% | 66,452 | $1.5M |
| Prudential Financial Inc. | 0.00% | Reduce -6.4% | 65,014 | $1.4M |
| California State Teachers Retirement System | 0.00% | Add +6.3% | 64,411 | $1.4M |
| Rice Hall James & Associates, LLC | 0.08% | Reduce -39.1% | 62,415 | $1.4M |
| SG Americas Securities, LLC | 0.00% | Reduce -1.7% | 61,958 | $1.4M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -2.0% | 61,443 | $1.4M |
| Group One Trading LLC | 0.04% | Reduce -28.4% | 60,736 | $1.3M |
| Natixis Advisors, LLC | 0.00% | Add +1.1% | 57,021 | $1.3M |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -13.7% | 56,809 | $1.2M |
| CANADA LIFE ASSURANCE Co | 0.00% | No change | 56,332 | $1.2M |
| Norges Bank | 0.00% | — | 54,306 | $1.2M |
| Deutsche Bank AG | 0.00% | Reduce -1.0% | 54,230 | $1.2M |
| Thrivent Financial for Lutherans | 0.00% | Reduce -4.4% | 46,589 | $1.0M |
| Nierenberg Investment Management Company, LLC | 0.49% | New | 44,555 | $979K |
| WINTON GROUP Ltd | 0.03% | New | 44,244 | $972K |
| State of Wisconsin Investment Board | 0.00% | Reduce -33.4% | 43,090 | $947K |
| Jump Financial, LLC | 0.01% | Reduce -65.0% | 41,416 | $910K |
| Orion Porfolio Solutions, LLC | 0.01% | Reduce -7.7% | 40,579 | $892K |
"% of holder's portfolio" is TNDM's weight in each manager's 13F, not the share of Tandem Diabetes Care Inc. the manager owns.