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Super Investors Alta Partners Management Company, L.P.
AP

Alta Partners Management Company, L.P.

Quarterly 13F snapshot: US-listed longs only, no performance figures — 13F data cannot support them.

Portfolio value
$127M
Positions
2
Quarter ended
June 30, 2026
Filed
July 22, 2026

Reported portfolio value by quarter (7 quarters reported)

$151M $41.6M
Q4 24 Q2 25 Q4 25 Q2 26

$63.4M in Q4 2024 → $127M now. Hover for any quarter.

Holdings

As reported for the quarter ended June 30, 2026. Activity is the change in share count since the prior quarter's filing.

Holding % of portfolio Activity Shares Value
Tyra Biosciences Inc 95.9% Unchanged 3,823,425 $122M
Vir Biotechnology Inc 4.1% Unchanged 509,917 $5.2M

Timeline of changes

What changed each quarter, from the filings' own share counts. Largest moves first; most recent 6 quarters.

Q2 2026

quarter ended June 30, 2026 · filed July 22, 2026

No position changes this quarter.

Q1 2026

quarter ended March 31, 2026 · filed April 21, 2026

No position changes this quarter.

Q4 2025

quarter ended December 31, 2025 · filed January 13, 2026

Company Action Shares changed Value of change % of portfolio
Tyra Biosciences Inc Trimmed −256,871 −$6.75M 97.0%

Q3 2025

quarter ended September 30, 2025 · filed November 07, 2025

No position changes this quarter.

Q2 2025

quarter ended June 30, 2025 · filed August 14, 2025

Company Action Shares changed Value of change % of portfolio
Allakos Inc Exited −2,546,147 −$580K —
Vir Biotechnology Inc Added +8,000 +$40.3K 6.2%

Q1 2025

quarter ended March 31, 2025 · filed May 12, 2025

Company Action Shares changed Value of change % of portfolio
Vir Biotechnology Inc Added +12,432 +$80.6K 7.8%

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