DOSSIER · 13F-HR · Q2 2026

Alta Partners Management Company, L.P.

$127M in tracked AUM across 2 positions as of Q2 2026.

AP
CIK 0002054419 · last filed Jun 30, 2026
Total AUM
$127M
as of Q2 2026
Holdings
2
positions
Whale Score
71
71
strong
Activity
no data
changes this Q
AI Analysis · Q2 2026

Portfolio Overview

Alta Partners Management Company, L.P. presents a highly concentrated and specialized investment portfolio as of the reporting period ending December 31, 2025. The firm manages a total portfolio value of approximately $103.59 million, spread across only two holdings. This represents a significant growth in assets under management (AUM) of 72.7% compared to the prior quarter's value of $59.99 million. The portfolio structure is characterized by extreme conviction, with the...

Key Holdings

The portfolio is dominated by a single position, Tyra Biosciences Inc., which is valued at $100.52 million and consists of 3.82 million shares. This holding represents nearly the entirety of the fund's capital (97.03%), indicating an exceptionally strong bullish stance on the company. The secondary holding, Vir Biotechnology Inc. (VIR), is valued at $3.07 million comprising 510,000 shares. While this is a negligible weight in the current portfolio (2.97%), it serves as the only other diversifying asset. The massive disparity in allocation between these two positions suggests that Alta Partners views Tyra Biosciences as a primary driver of alpha, while Vir Biotechnology plays a minor, perhaps experimental or residual, role in the strategy.

Quarter at a glance — Q2 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q2 2026.

#HoldingValueSharesWeight
01
TYRA
TYRA BIOSCIENCES INC
$122M3.8M95.9%
02
VIR
VIR BIOTECHNOLOGY INC
$5M510K4.1%

Filing history

2026Q2Jun 30
$127M 15.7%
2 positionsView →
2026Q1Mar 31
$151M 45.8%
2 positionsView →
2025Q4Dec 31
$104M 72.7%
2 positionsView →
2025Q3Sep 30
$60M 44.2%
2 positionsView →
2025Q2Jun 30
$42M 0.4%
2 positionsLocked
2025Q1Mar 31
$42M 34.1%
3 positionsLocked
2024Q4Dec 31
$63M
3 positionsLocked