Atlas Venture Life Science Advisors, LLC
Net seller this quarter
$881M
7
-$131M
100.0%
Holdings
| Company | Value | % of portfolio | % of company | POSITION CHANGE qoq % | First reported |
|---|---|---|---|---|---|
| Q2 2026 | |||||
 KYMR | $327M | 37.05% | 3.44% | -37.8% | Q4 2021 |
 DYN | $151M | 17.14% | 4.10% | -25.5% | Q4 2021 |
 SION | $132M | 14.95% | 6.63% | Not reported | Q1 2025 |
 KLRA | $114M | 12.93% | 3.99% | New | Q2 2026 |
 IRON | $111M | 12.56% | 3.95% | Not reported | Q4 2022 |
 QTTB | $34.6M | 3.93% | 11.45% | +29.9% | Q1 2024 |
 KRRO | $12.7M | 1.44% | 6.55% | -15.3% | Q4 2023 |
| Q1 2026 | |||||
| KYMR | $381M | 48.26% | 5.57% | -1.8% | Q4 2021 |
| DYN | $166M | 20.95% | 5.53% | Not reported | Q4 2021 |
| SION | $120M | 15.20% | 6.65% | Not reported | Q1 2025 |
| IRON | $96.8M | 12.25% | 3.96% | Not reported | Q4 2022 |
| QTTB | $13.4M | 1.70% | 14.30% | Not reported | Q1 2024 |
| KRRO | $12.9M | 1.63% | 7.88% | Not reported | Q4 2023 |
| Q4 2025 | |||||
| KYMR | $363M | 41.91% | 5.73% | -4.8% | Q4 2021 |
| DYN | $179M | 20.64% | 5.54% | Not reported | Q4 2021 |
| SION | $123M | 14.24% | 6.70% | -17.2% | Q1 2025 |
| IRON | $120M | 13.90% | 4.00% | -29.3% | Q4 2022 |
| DAWN | $59.8M | 6.91% | 6.23% | -0.3% | Q4 2021 |
| KRRO | $9.11M | 1.05% | 12.08% | Not reported | Q4 2023 |
| QTTB | $6.95M | 0.80% | 16.27% | Not reported | Q1 2024 |
| GBIO | $4.7M | 0.54% | 12.29% | Not reported | Q4 2021 |
| Q3 2025 | |||||
| KYMR | $277M | 36.82% | 6.83% | Not reported | Q4 2021 |
| IRON | $142M | 18.81% | 6.12% | -10.1% | Q4 2022 |
| DYN | $116M | 15.35% | 6.40% | Not reported | Q4 2021 |
| SION | $106M | 14.13% | 8.13% | -2.1% | Q1 2025 |
| KRRO | $54.5M | 7.24% | 12.10% | Not reported | Q4 2023 |
| DAWN | $45.3M | 6.02% | 6.26% | Not reported | Q4 2021 |
| GBIO | $5.07M | 0.67% | 12.29% | -90.0% | Q4 2021 |
| QTTB | $4.14M | 0.55% | 17.00% | Not reported | Q1 2024 |
 IMA | $3.08M | 0.41% | 9.39% | New | Q3 2025 |