Tandem Diabetes CareTNDM
13F holders, Q1 2025 (March 31)275holders −40
35new positions
76sold out
6famous investors
$19.16avg. 13F price*
At the end of Q1 2025, 275 institutions reported holding Tandem Diabetes Care Inc. (TNDM) in their 13F filings, down 40 from Q4 2024. 35 opened new positions and 76 sold out. The largest holders were BlackRock, Inc. ($211.3M), Vanguard Group Inc. ($139.7M) and Sessa Capital IM, L.P. ($85.6M). 6 famous investors held it, including Paul Tudor Jones (0.1% of Tudor Investment Corporation's portfolio), Joel Greenblatt (0.0% of Gotham Asset Management's portfolio) and Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- Tandem Diabetes Care Inc.
- CUSIP
- 875372203
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2024 → Q1 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 35 | $139.8M |
| Exits | 76 | $187.4M |
All 13F filers, Q4 2024 → Q1 2025: 13,479,246 shares bought and 12,335,621 shares sold, net +1,143,625 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 275 holders
| BlackRock, Inc. | 0.00% | Reduce -5.7% | 11,028,712 | $211.3M |
| Vanguard Group Inc. | 0.00% | Reduce -2.0% | 7,292,169 | $139.7M |
| Sessa Capital IM, L.P. | 3.54% | New | 4,466,307 | $85.6M |
| GW&K Investment Management, LLC | 0.51% | Add +34.9% | 2,863,987 | $54.9M |
| ArrowMark Colorado Holdings LLC | 0.84% | Reduce -0.3% | 2,716,332 | $52.0M |
| State Street Corp. | 0.00% | Reduce -2.8% | 2,687,739 | $51.5M |
| Hood River Capital Management LLC | 0.76% | Add +80.9% | 2,312,044 | $44.3M |
| Stephens Investment Management Group LLC | 0.47% | Add +9.7% | 1,706,915 | $32.7M |
| Paradice Investment Management LLC | 7.06% | Add +72.5% | 1,649,907 | $31.6M |
| Geode Capital Management, LLC | 0.00% | Add +1.5% | 1,557,210 | $29.8M |
| Jennison Associates LLC | 0.02% | Add +0.7% | 1,477,108 | $28.3M |
| Jacobs Levy Equity Management, Inc. | 0.11% | Reduce -11.4% | 1,471,569 | $28.2M |
| Fred Alger Management, LLC | 0.16% | Reduce -25.2% | 1,454,239 | $27.9M |
| FMR LLC | 0.00% | Add +32.2% | 1,437,076 | $27.5M |
| Champlain Investment Partners, LLC | 0.19% | Reduce -0.8% | 1,368,888 | $26.2M |
| Park West Asset Management LLC | 1.76% | Reduce -29.8% | 1,123,052 | $21.5M |
| Morgan Stanley | 0.00% | Add +9.9% | 930,969 | $17.8M |
| Brown Advisory Inc. | 0.03% | Add +1.3% | 925,310 | $17.7M |
| UBS Group AG | 0.00% | Add +33.4% | 835,692 | $16.0M |
| Balyasny Asset Management L.P. | 0.04% | New | 769,743 | $14.7M |
| Capital World Investors | 0.00% | No change | 767,000 | $14.7M |
| Baillie Gifford & Co. | 0.01% | Reduce -1.8% | 732,574 | $14.0M |
| Goldman Sachs Group Inc. | 0.00% | Add +5.0% | 712,559 | $13.7M |
| Northern Trust Corp. | 0.00% | Reduce -1.1% | 689,534 | $13.2M |
| Two Sigma Advisers, LP | 0.03% | Reduce -22.9% | 679,583 | $13.0M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.05% | Add +25.2% | 644,988 | $12.4M |
| Two Sigma Investments, LP | 0.03% | Reduce -25.5% | 641,442 | $12.3M |
| Brown Capital Management LLC | 0.34% | Reduce -7.9% | 591,014 | $11.3M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -5.3% | 570,150 | $10.9M |
| Barclays PLC | 0.00% | Add +7.8% | 514,006 | $9.8M |
| Soleus Capital Management, L.P. | 0.75% | New | 496,039 | $9.5M |
| Kingdon Capital Management, L.L.C. | 1.97% | Reduce -37.4% | 495,229 | $9.5M |
| Bank of America Corp. | 0.00% | Add +46.9% | 466,730 | $8.9M |
| BNP Paribas Financial Markets | 0.01% | Add +1752.6% | 459,798 | $8.8M |
| Bank of New York Mellon Corp | 0.00% | Reduce -6.7% | 407,482 | $7.8M |
| Tudor Investment Corporation | 0.07% | Add +139.8% | 405,292 | $7.8M |
| Principal Financial Group Inc. | 0.00% | Add +2.9% | 399,450 | $7.7M |
| Ameriprise Financial Inc. | 0.00% | Add +12.2% | 387,887 | $7.2M |
| Frontier Capital Management Co. LLC | 0.08% | Add +34.2% | 365,176 | $7.0M |
| Aberdeen Group plc | 0.01% | Add +43.1% | 356,218 | $6.8M |
| Silvercrest Asset Management Group LLC | 0.05% | Reduce -0.1% | 346,095 | $6.6M |
| Envestnet Asset Management Inc. | 0.00% | Add +25.4% | 318,530 | $6.1M |
| Nuveen, LLC | 0.00% | — | 308,315 | $5.9M |
| DAFNA Capital Management LLC | 1.62% | Add +31.8% | 294,208 | $5.6M |
| Renaissance Technologies | 0.01% | Reduce -9.4% | 286,127 | $5.5M |
| Edmond DE Rothschild Holding S.A. | 0.09% | New | 252,600 | $4.8M |
| First Light Asset Management, LLC | 0.54% | Reduce -16.0% | 245,257 | $4.7M |
| Quantinno Capital Management LP | 0.03% | Add +368.6% | 241,831 | $4.6M |
| Invesco Ltd. | 0.00% | Add +15.7% | 237,122 | $4.5M |
| JPMorgan Chase & Co. | 0.00% | Reduce -40.5% | 233,765 | $4.5M |
| Acadian Asset Management LLC | 0.01% | New | 232,872 | $4.5M |
| Millennium Management | 0.00% | Add +50.4% | 227,585 | $4.4M |
| Beaconlight Capital, LLC | 2.88% | Reduce -33.6% | 219,757 | $4.2M |
| Royal Bank of Canada | 0.00% | Add +30.4% | 211,666 | $4.1M |
| Algert Global LLC | 0.10% | Add +133.8% | 209,320 | $4.0M |
| Public Sector Pension Investment Board | 0.02% | Add +26.9% | 208,231 | $4.0M |
| Prudential Financial Inc. | 0.01% | Reduce -1.6% | 172,064 | $3.8M |
| New York State Common Retirement Fund | 0.01% | Reduce -6.8% | 197,775 | $3.8M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +9.1% | 193,993 | $3.7M |
| KBC Group NV | 0.01% | Add +0.7% | 193,808 | $3.7M |
| FIL Ltd | 0.00% | Reduce -4.4% | 192,494 | $3.7M |
| Engineers Gate Manager LP | 0.06% | Reduce -14.3% | 190,905 | $3.7M |
| Kennedy Capital Management LLC | 0.09% | Reduce -30.0% | 187,143 | $3.6M |
| Raymond James Financial Inc. | 0.00% | Add +14.1% | 186,628 | $3.6M |
| Susquehanna International Group, LLP | 0.01% | Add +506.1% | 182,251 | $3.5M |
| Alliancebernstein L.P. | 0.00% | Add +92.6% | 180,708 | $3.5M |
| Sector Gamma As | 1.11% | New | 180,523 | $3.5M |
| Rhumbline Advisers | 0.00% | Reduce -0.2% | 178,274 | $3.4M |
| Legal & General Group Plc | 0.00% | Reduce -3.1% | 176,987 | $3.4M |
| Divisadero Street Capital Management, LP | 0.38% | Reduce -51.5% | 174,692 | $3.3M |
| iA Global Asset Management Inc. | 0.05% | New | 165,380 | $3.2M |
| State of Wisconsin Investment Board | 0.01% | Add +9.7% | 156,212 | $3.0M |
| Polar Capital Holdings Plc | 0.02% | Reduce -1.6% | 140,536 | $2.7M |
| Russell Investments Group, Ltd. | 0.00% | Reduce -52.1% | 139,094 | $2.7M |
| Truist Financial Corp. | 0.00% | Add +15.9% | 138,547 | $2.7M |
| Voya Investment Management LLC | 0.00% | Add +39.2% | 136,698 | $2.6M |
| Gsa Capital Partners LLP | 0.23% | New | 130,595 | $2.5M |
| Swiss National Bank | 0.00% | Reduce -1.1% | 127,300 | $2.4M |
| Sei Investments Co. | 0.00% | Add +0.4% | 124,356 | $2.4M |
| Formula Growth Ltd. | 0.96% | Reduce -1.6% | 123,945 | $2.4M |
| Squarepoint Ops LLC | 0.01% | Add +95.7% | 123,883 | $2.4M |
| Mizuho Markets Americas LLC | 0.05% | Add +36.1% | 115,772 | $2.2M |
| Citadel Advisors | 0.00% | Reduce -13.5% | 114,034 | $2.2M |
| Rice Hall James & Associates, LLC | 0.12% | Reduce -0.5% | 104,956 | $2.0M |
| Moore Capital Management, LP | 0.08% | Add +397.4% | 104,451 | $2.0M |
| Citigroup Inc. | 0.00% | Add +6.3% | 101,189 | $1.9M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | New | 87,823 | $1.7M |
| Jupiter Asset Management Ltd. | 0.02% | New | 87,815 | $1.7M |
| Mangrove Partners Im, LLC | 0.18% | Add +69.1% | 82,428 | $1.6M |
| Cerity Partners LLC | 0.00% | Add +32.2% | 76,005 | $1.5M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +2.9% | 74,413 | $1.4M |
| Oppenheimer Asset Management Inc. | 0.02% | Add +17.9% | 72,752 | $1.4M |
| Marshall Wace, LLP | 0.00% | Reduce -92.6% | 70,399 | $1.3M |
| Dark Forest Capital Management LP | 0.06% | New | 70,128 | $1.3M |
| Gotham Asset Management | 0.01% | Reduce -40.8% | 68,629 | $1.3M |
| New York State Teachers Retirement System | 0.00% | No change | 68,200 | $1.3M |
| HighTower Advisors, LLC | 0.00% | Add +604.6% | 67,168 | $1.3M |
| Wells Fargo & Company | 0.00% | Add +9.2% | 66,910 | $1.3M |
| Natixis Advisors, LLC | 0.00% | Reduce -0.2% | 65,573 | $1.3M |
| Hussman Strategic Advisors, Inc. | 0.29% | New | 63,000 | $1.2M |
"% of holder's portfolio" is TNDM's weight in each manager's 13F, not the share of Tandem Diabetes Care Inc. the manager owns.