Atlas Venture Life Science Advisors, LLC
•CIK: 1917529•Filing: Q4 2025
**Atlas Venture Life Science Advisors, LLC** manages $865M across a concentrated portfolio of 8 positions. The fund exhibits a significant conviction in key life science names, with KYMR representing the largest holding at $362.6M. Further substantial allocations include DYN at $178.6M and SION at $123.2M, indicating a deep focus on high-growth, specialized biopharma opportunities. This concentrated structure suggests a highly selective, deep-dive approach within the life sciences sector.
Total AUM
$865.2M
QoQ Performance
+14.9%
Positions
8
Top 10 Concentration
100.0%
Latest Filing
Q4 2025
Top Holdings Allocation
KYMR
DYN
SION
IRON
DAWN
KYMR41.9%
DYN20.6%
SION14.2%
IRON13.9%
DAWN6.9%
KRRO1.1%
QTTB0.8%
Generation0.5%
📈 Biggest Buys
—
Generation Bio, Co.
NEW
0.5% of portfolio
📉 Biggest Sells
Sector Breakdown
Other100.0%
Changes from Q3 2025
NEW1 new position
↓4 decreased
Historical Filings
Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023