| 4 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
| 4.3M |
| $64.9M |
| +7.7% |
| 6.274% |
| 0.00% |
| 5 | First Light Asset Management, LLC | 3.4M | $51.1M | +157.4% | 4.937% | 3.10% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 3.1M | $46.7M | +1.9% | 4.519% | 0.00% |
| 7 | STATE STREET CORP | 2.9M | $43.0M | +7.1% | 4.161% | 0.00% |
| 8 | JENNISON ASSOCIATES LLC | 2.3M | $35.2M | +40.6% | 3.402% | 0.02% |
| 9 | Paradice Investment Management LLC | 2.0M | $30.5M | -0.9% | 2.954% | 4.87% |
| 10 | JACOBS LEVY EQUITY MANAGEMENT, INC | 2.0M | $30.3M | +31.7% | 2.928% | 0.11% |
| 11 | Freestone Grove Partners LP | 1.9M | $28.2M | +40.2% | 2.723% | 0.18% |
| 12 | CITADEL ADVISORS LLC | 1.9M | $28.0M | -18.6% | 2.706% | 0.00% |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 1.8M | $27.2M | +7.2% | 2.628% | 0.00% |
| 14 | DRIEHAUS CAPITAL MANAGEMENT LLC | 1.8M | $27.0M | -22.4% | 2.608% | 0.16% |
| 15 | MILLENNIUM MANAGEMENT LLC | 1.3M | $19.8M | +72.2% | 1.914% | 0.01% |
| 16 | Woodline Partners LP | 1.3M | $19.7M | — | 1.908% | 0.06% |
| 17 | ArrowMark Colorado Holdings LLC | 1.3M | $19.6M | -58.1% | 1.896% | 0.82% |
| 18 | FMR LLC | 976K | $14.7M | +36.8% | 1.425% | 0.00% |
| 19 | Point72 Asset Management, L.P. | 911K | $13.7M | +78.4% | 1.329% | 0.02% |
| 20 | ROYCE & ASSOCIATES LP | 901K | $13.6M | +29.3% | 1.314% | 0.11% |
| 21 | WELLINGTON MANAGEMENT GROUP LLP | 872K | $13.2M | -16.4% | 1.272% | 0.00% |
| 22 | GOLDMAN SACHS GROUP INC | 862K | $13.0M | -61.1% | 1.258% | 0.00% |
| 23 | NORTHERN TRUST CORP | 754K | $11.4M | +6.7% | 1.100% | 0.00% |
| 24 | Verition Fund Management LLC | 700K | $10.6M | +553.5% | 1.022% | 0.03% |
| 25 | ExodusPoint Capital Management, LP | 692K | $10.4M | +9.3% | 1.010% | 0.07% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in TNDM — a direct measure of their conviction.
| 115.58% |
| +6.02 pp |
| $1.36B |
| 53% |
| Q4 2024 | 312 | 3.4% | 109.56% | 1.14 pp | $2.90B | 0.0% |
| Q3 2024 | 323 | — | 110.70% | — | $2.90B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
45 institutions opened new positions in TNDM during Q2 2026, while 44 fully exited. 52 added to existing positions and 173 trimmed.
TNDM institutional ownership fell by 1.08 percentage points quarter-over-quarter, with a net change of +1 holders.
The top 10 institutions account for 52.6% of all reported 13F value in TNDM, and the top 25 account for 74.4%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Tandem Diabetes Care, Inc. (TNDM) Institutional Ownership