AP
Alta Partners Management Company, L.P. Investment Portfolio (Q2 2026) — 13F Stock Holdings
Alta Partners Management Company, L.P.CIK: 0002054419
Concentrated strategyQuality / disciplined sizingLong-term holder
Total reported value
$127.3M
Reporting period: 2026-06-30 · Number of holdings: 2
Alta Partners Management Company, L.P. disclosed 2 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $127.3M and a quarterly turnover rate of 17.9%.
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Personality snowflake
- Concentration
- 100
- Portfolio Stability
- 17.92
- Momentum
- 50
- Sector conviction
- 0
- Diversification
- 4
- Sizing Uniformity
- 87.01
Sector classification currently covers about 0% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govTrim TYRA
0.0% -$24.3M
Add VIR
0.0% $627.2K
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | TYRA | Tyra Biosciences Inc | Stock-Other | 95.92% | -1.05% | — | |
| 2 | VIR | Vir Biotechnology Inc | Stock-Other | 4.08% | +1.05% | — |
Portfolio Performance
Performance for Q3 2026
-23.9%
Performance Last 4 Quarters
+98.1%
- Stdev
- +52.5%
- Beta
- -0.63
- Alpha
- +74%
- Max Drawdown
- -33.2%
- Annualized Perf
- +62.2%
- Batting Avg vs S&P
- +55.6%
- Sortino
- +2.3
- Stutzer
- +0.35
- Treynor
- -0.98
- Sterling
- +1.44
- Calmar
- +1.87
- Information Ratio
- +0.76
- Tracking Error
- +56.2%
- Stdev Down
- +26.9%
- Winning Months %
- +61.1%
- Losing Months %
- +38.9%
- Best 12 Months
- +290.2%
- Worst 12 Months
- +98.1%
- Efficiency Ratio
- +0.46
- Sharpe
- +1.18
- Stdev Sectors
- —
- Skewness
- +0.15
- Kurtosis
- +0.17
- Upside Potential
- +4.04
Reported value over time
Sector allocation
Not enough sector-mapped data yet
Sector allocation over time
Quarterly history
* This report is exclusively curated by the AlphaSMO team. AlphaSMO is the web's most authoritative 13F / Inside Trader database, delivering precise insider trading and institutional holdings insights.
Holding changes this quarter
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | VIR | Vir Biotechnology Inc | +1.1% | — | Unchanged |
| 2 | TYRA | Tyra Biosciences Inc | -1.1% | — | Unchanged |
Filing History
FAQ
What is Alta Partners Management Company, L.P. and what type of investor is it?
Alta Partners Management Company, L.P. is an investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $127.3M, spread across 2 disclosed positions.
What are Alta Partners Management Company, L.P.'s largest equity positions?
Based on the latest 13F filing, Alta Partners Management Company, L.P.'s top holdings by market value are:
1. Tyra Biosciences Inc (TYRA) — $122.1M (95.9%)
2. Vir Biotechnology Inc (VIR) — $5.2M (4.1%)
What changes did Alta Partners Management Company, L.P. make in its most recent portfolio filing?
No notable portfolio changes were recorded for Alta Partners Management Company, L.P. in the most recent quarter. Holdings appear to have remained relatively stable.
What sectors does Alta Partners Management Company, L.P. focus on?
Sector breakdown data is not yet available for Alta Partners Management Company, L.P.. Check back after the next 13F processing cycle.
Investment Profile
Alta Partners Management Company, L.P. returned an annualized 62.2% over the trailing 18 months — outperforming the S&P 500 by 74.0 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of -0.63 (less volatile than the market) and a 56% quarterly batting average against the index.
Its portfolio is concentrated and long-term-holding.
Its turnover score has risen from 0 to 18 over the past 4 quarters — a shift toward more active trading.
It has added to its VIR position for two straight quarters, increasing it by $2.1M to reach $5.2M.
Peer Institutions
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Sector conviction93.3
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MW
M Wealth Management, LLC
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Total reported value
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PI
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CIK 0001802531
Total reported value
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Concentration10.2
Portfolio Stability0.0
Sector conviction47.9
AUM within 0.0% of this institution
View detail
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Developer Access
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