Alta Partners Management Company, L.P.

In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 7, 2025), Alta Partners Management Company, L.P. reported 2 stock positions worth $60.0 million. Its top holding was Tyra Biosciences (TYRA) at 95.1% of the portfolio, followed by Vir Biotechnology (VIR, 4.9%). Its holdings were unchanged from Q2 2025.

Most Recent 13F
Q2 2026
Location
JACKSON, WY
CIK
0002054419
Portfolio Value
$60.0M (Q3 2025)
SEC Filing
0002054419-25-000004 ↗ filed Nov 7, 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 Q2 2025 Q3 2025: $60.0M $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 · $60.0M
TYRA Tyra Biosciences Inc. 95.15% 4,080,296 $57.1M No change
VIR Vir Biotechnology Inc. 4.85% 509,917 $2.9M No change

Portfolio Sells Q2 2025 → Q3 2025
None this quarter.

Portfolio Buys Q2 2025 → Q3 2025
None this quarter.

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