Alta Partners Management Company, L.P.

In its 13F for Q2 2025 (holdings as of June 30, 2025, filed August 14, 2025), Alta Partners Management Company, L.P. reported 2 stock positions worth $41.6 million. Its top holding was Tyra Biosciences (TYRA) at 93.8% of the portfolio, followed by Vir Biotechnology (VIR, 6.2%). Compared with Q1 2025, it sold out of 1 and added to 1. The biggest buy was Vir Biotechnology (VIR, shares +2%) and the biggest sale an exit from Allakos (ALLK).

Most Recent 13F
Q2 2026
Location
JACKSON, WY
CIK
0002054419
Portfolio Value
$41.6M (Q2 2025)
SEC Filing
0001415889-25-021829 ↗ filed Aug 14, 2025

Holdings Value

0$50.0M$100.0M$150.0M$200.0M Q4 2024: $63.4M Q4 2024 Q1 2025: $41.8M Q1 2025 Q2 2025: $41.6M $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 2 stocks · $41.6M
TYRA Tyra Biosciences Inc. 93.82% 4,080,296 $39.0M No change
VIR Vir Biotechnology Inc. 6.18% 509,917 $2.6M Add +1.6%

Portfolio Sells Q1 2025 → Q2 2025
ALLK Allakos LLC Sold out 0.00% −1.39

Portfolio Buys Q1 2025 → Q2 2025
VIR Vir Biotechnology Inc. Add +1.6% 6.18% −1.61

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