Tandem Diabetes Care Inc (NASDAQ:TNDM) has 259 institutional investors with active 13F positions as of December 2025.
| Owner Name | Date | Shares Held | Change (QoQ) | Change (%) | Value (USD) |
|---|---|---|---|---|---|
| BlackRock, Inc. | 31 Dec, 2025 | 11,149,181 | -952,290 | -7.87% | $245,058,999.00 |
| BlackRock, Inc. | 31 Dec, 2025 | 10,690,844 | -458,337 | -4.11% | $204,943,480.00 |
| VANGUARD GROUP INC | 31 Dec, 2025 | 7,341,356 | 278,042 | 3.94% | $161,363,004.00 |
| Sessa Capital IM, L.P. | 31 Dec, 2025 | 5,000,000 | 0 | 0.00% | $109,900,000.00 |
| Sessa Capital IM, L.P. | 31 Dec, 2025 | 4,730,757 | -269,243 | -5.38% | $90,688,612.00 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 31 Dec, 2025 | 3,993,333 | 3,993,333 | 0.00% | $76,552,194.00 |
| Goldman Sachs Group Inc | 31 Dec, 2025 | 3,366,800 | 1,935,428 | 135.21% | $74,002,266.00 |
| ArrowMark Colorado Holdings LLC | 31 Dec, 2025 | 3,103,609 | 213,918 | 7.40% | $59,496,185.00 |
| VANGUARD CAPITAL MANAGEMENT LLC | 31 Dec, 2025 | 3,038,919 | 3,038,919 | 0.00% | $58,256,077.00 |
| ArrowMark Colorado Holdings LLC | 31 Dec, 2025 | 2,889,691 | -801,507 | -21.71% | $63,515,408.00 |
| GW&K Investment Management, LLC | 31 Dec, 2025 | 2,689,106 | 13,949 | 0.52% | $51,550.00 |
| GW&K Investment Management, LLC | 31 Dec, 2025 | 2,675,157 | -46,492 | -1.71% | $58,800.00 |
| State Street Corp | 31 Dec, 2025 | 2,662,260 | 20,536 | 0.78% | $51,035,524.00 |
| State Street Corp | 31 Dec, 2025 | 2,641,724 | -26,464 | -0.99% | $58,065,094.00 |
| DRIEHAUS CAPITAL MANAGEMENT LLC | 31 Dec, 2025 | 2,304,414 | 694,072 | 43.10% | $44,175,616.00 |
| Goldman Sachs Group Inc | 31 Dec, 2025 | 2,218,922 | -1,147,878 | -34.09% | $42,536,734.00 |
| CITADEL ADVISORS LLC | 31 Dec, 2025 | 2,192,667 | 104,064 | 4.98% | $42,033,426.00 |
| CITADEL ADVISORS LLC | 31 Dec, 2025 | 2,088,603 | 2,048,802 | 5,147.61% | $45,907,494.00 |
| Morgan Stanley | 31 Dec, 2025 | 2,080,497 | 1,342,950 | 182.08% | $45,729,350.00 |
| Paradice Investment Management LLC | 31 Dec, 2025 | 2,077,745 | -118,723 | -5.41% | $45,668,835.00 |