Alta Partners Management Company, L.P.

In its 13F for Q1 2025 (holdings as of March 31, 2025, filed May 12, 2025), Alta Partners Management Company, L.P. reported 3 stock positions worth $41.8 million. Its top holding was Tyra Biosciences (TYRA) at 90.8% of the portfolio, followed by Vir Biotechnology (VIR, 7.8%) and Allakos (ALLK, 1.4%). Compared with Q4 2024, it added to 1. The biggest buy was Vir Biotechnology (VIR, shares +3%).

Most Recent 13F
Q2 2026
Location
JACKSON, WY
CIK
0002054419
Portfolio Value
$41.8M (Q1 2025)
SEC Filing
0001415889-25-012667 ↗ filed May 12, 2025

Holdings Value

0$50.0M$100.0M$150.0M$200.0M Q4 2024: $63.4M Q4 2024 Q1 2025: $41.8M $41.8M Q1 2025 Q2 2025: $41.6M Q2 2025 Q3 2025: $60.0M Q3 2025 Q4 2025: $103.6M Q4 2025 Q1 2026: $151.0M Q1 2026 Q2 2026: $127.3M Q2 2026

Holdings 3 stocks · $41.8M
TYRA Tyra Biosciences Inc. 90.83% 4,080,296 $37.9M No change
VIR Vir Biotechnology Inc. 7.78% 501,917 $3.3M Add +2.5%
ALLK Allakos LLC 1.39% 2,546,147 $580K No change

Portfolio Sells Q4 2024 → Q1 2025
None this quarter.

Portfolio Buys Q4 2024 → Q1 2025
VIR Vir Biotechnology Inc. Add +2.5% 7.78% +2.12

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 2$127.3MTYRA, VIR
Q1 2026 2$151.0MTYRA, VIR
Q4 2025 2$103.6MTYRA, VIR
Q3 2025 2$60.0MTYRA, VIR
Q2 2025 2$41.6MTYRA, VIR
Q1 2025 3$41.8MTYRA, VIR, ALLK
Q4 2024 3$63.4MTYRA, VIR, ALLK