Alta Partners Management Company, L.P. Institutional Portfolio (13F)

CIK: 0002054419

Concentrated strategyQuality / disciplined sizing

Total reported value

$151.0M

Reporting period: 2026-03-31 · Number of holdings: 2

Alta Partners Management Company, L.P. disclosed 2 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $151.0M and a quarterly turnover rate of 37.3%.

Browse other institutions with $100M to $1B AUM Browse other institutions starting with "A"

Personality snowflake

Concentration: 100
Portfolio Stability: 37.25
Momentum/Contrarian: 50
Sector conviction: 0
Diversification: 4
Sizing Uniformity: 86.71

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.

Recent moves

Trim TYRA
0.0%　$45.9M
Add VIR
0.0%　$1.5M

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	96.97%	-0.06%	—
2	VIR	Vir Biotechnology INC	Stock-Other	3.03%	+0.06%	—

Portfolio Performance

Performance for Q3 2026

-7.5%

Performance Last 4 Quarters

+188.1%

Stdev: +49.1%
Beta: -0.52
Alpha: +89.9%
Max Drawdown: -15.7%
Annualized Perf: +97%
Batting Avg vs S&P: +64.7%
Sortino: +3.66
Stutzer: +0.49
Treynor: -1.54
Sterling: +3.78
Calmar: +6.19
Information Ratio: +1.18
Tracking Error: +52.9%
Stdev Down: +22%
Winning Months %: +70.6%
Losing Months %: +29.4%
Best 12 Months: +290.2%
Worst 12 Months: +170.3%
Efficiency Ratio: +0.76
Sharpe: +1.64
Stdev Sectors: —
Skewness: +0.22
Kurtosis: +0.57
Upside Potential: +5.25

Reported value over time

Sector allocation

Not enough sector-mapped data yet

Sector allocation over time

Quarterly history

Period	Holdings	Total value	Stability	Top holdings
2026-03-31	2	$151.0M	37	1TYRA 2VIR Top holdings2026-03-31 1.TYRA 2.VIR
2025-12-31	2	$103.6M	53	1TYRA 2VIR Top holdings2025-12-31 1.TYRA 2.VIR
2025-09-30	2	$60.0M	39	1TYRA 2VIR Top holdings2025-09-30 1.TYRA 2.VIR
2025-06-30	2	$41.6M	0	1TYRA 2VIR Top holdings2025-06-30 1.TYRA 2.VIR
2025-03-31	3	$41.8M	0	1TYRA 2VIR 3ALLKGUSD Top holdings2025-03-31 1.TYRA 2.VIR 3.ALLKGUSD
2024-12-31	3	$63.4M	0	1TYRA 2VIR 3ALLKGUSD Top holdings2024-12-31 1.TYRA 2.VIR 3.ALLKGUSD

Holding changes this quarter

Position changes disclosed by Alta Partners Management Company, L.P. for the quarter ending 2026-03-31, including ticker, issuer, weight change, shares change, and action
#	Ticker	Issuer	Weight Change	Shares Change	Action
1	VIR	Vir Biotechnology INC	+0.1%	—	Unchanged
2	TYRA	Tyra Biosciences INC	-0.1%	—	Unchanged

Filing History

Period	Filed	Type	EDGAR
2026-03-31	2026-04-21	13F-HR	View on EDGAR
2025-12-31	2026-01-13	13F-HR	View on EDGAR
2025-09-30	2025-11-07	13F-HR	View on EDGAR
2025-06-30	2025-08-14	13F-HR	View on EDGAR
2025-03-31	2025-05-12	13F-HR	View on EDGAR
2024-12-31	2025-02-05	13F-HR	View on EDGAR

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 (2026-03-31), the firm manages a tracked equity portfolio valued at approximately $151.0M, 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) — $146.4M (97.0%) 2. Vir Biotechnology INC (VIR) — $4.6M (3.0%)

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.

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Portfolio Stability100.0

Sector conviction85.4

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View detail

MFA Wealth Services

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Sector conviction54.9

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View detail

Merkkuri Wealth Advisors LLC

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Total reported value

$151.1M

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Portfolio Stability18.4

Sector conviction56.4

AUM within 0.0% of this institution

View detail

Similar Holdings Style

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Sector conviction100.0

1 of the top 5 holdings overlap, including Vir Biotechnology INC

View detail

ARCH Venture Management, LLC

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Total reported value

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1 of the top 5 holdings overlap, including Vir Biotechnology INC

View detail

Zebra Capital Management LLC

CIK 0001316915

Total reported value

$20.0M

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Stale — no recent filing

Concentration8.3

Portfolio Stability0.0

Sector conviction0.0

1 of the top 5 holdings overlap, including Vir Biotechnology INC

View detail

Alta Partners Management Company, L.P. Institutional Portfolio (13F)

CIK: 0002054419

Concentrated strategyQuality / disciplined sizing

Total reported value

$151.0M

Reporting period: 2026-03-31 · Number of holdings: 2

Alta Partners Management Company, L.P. disclosed 2 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $151.0M and a quarterly turnover rate of 37.3%.

Browse other institutions with $100M to $1B AUM Browse other institutions starting with "A"

Personality snowflake

Concentration: 100
Portfolio Stability: 37.25
Momentum/Contrarian: 50
Sector conviction: 0
Diversification: 4
Sizing Uniformity: 86.71

Recent moves

Trim TYRA
0.0%　$45.9M
Add VIR
0.0%　$1.5M

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	96.97%	-0.06%	—
2	VIR	Vir Biotechnology INC	Stock-Other	3.03%	+0.06%	—

Portfolio Performance

Performance for Q3 2026

-7.5%

Performance Last 4 Quarters

+188.1%

Stdev: +49.1%
Beta: -0.52
Alpha: +89.9%
Max Drawdown: -15.7%
Annualized Perf: +97%
Batting Avg vs S&P: +64.7%
Sortino: +3.66
Stutzer: +0.49
Treynor: -1.54
Sterling: +3.78
Calmar: +6.19
Information Ratio: +1.18
Tracking Error: +52.9%
Stdev Down: +22%
Winning Months %: +70.6%
Losing Months %: +29.4%
Best 12 Months: +290.2%
Worst 12 Months: +170.3%
Efficiency Ratio: +0.76
Sharpe: +1.64
Stdev Sectors: —
Skewness: +0.22
Kurtosis: +0.57
Upside Potential: +5.25

Reported value over time

Sector allocation

Not enough sector-mapped data yet

Sector allocation over time

Quarterly history

Period	Holdings	Total value	Stability	Top holdings
2026-03-31	2	$151.0M	37	1TYRA 2VIR Top holdings2026-03-31 1.TYRA 2.VIR
2025-12-31	2	$103.6M	53	1TYRA 2VIR Top holdings2025-12-31 1.TYRA 2.VIR
2025-09-30	2	$60.0M	39	1TYRA 2VIR Top holdings2025-09-30 1.TYRA 2.VIR
2025-06-30	2	$41.6M	0	1TYRA 2VIR Top holdings2025-06-30 1.TYRA 2.VIR
2025-03-31	3	$41.8M	0	1TYRA 2VIR 3ALLKGUSD Top holdings2025-03-31 1.TYRA 2.VIR 3.ALLKGUSD
2024-12-31	3	$63.4M	0	1TYRA 2VIR 3ALLKGUSD Top holdings2024-12-31 1.TYRA 2.VIR 3.ALLKGUSD

Holding changes this quarter

Position changes disclosed by Alta Partners Management Company, L.P. for the quarter ending 2026-03-31, including ticker, issuer, weight change, shares change, and action
#	Ticker	Issuer	Weight Change	Shares Change	Action
1	VIR	Vir Biotechnology INC	+0.1%	—	Unchanged
2	TYRA	Tyra Biosciences INC	-0.1%	—	Unchanged

Filing History

Period	Filed	Type	EDGAR
2026-03-31	2026-04-21	13F-HR	View on EDGAR
2025-12-31	2026-01-13	13F-HR	View on EDGAR
2025-09-30	2025-11-07	13F-HR	View on EDGAR
2025-06-30	2025-08-14	13F-HR	View on EDGAR
2025-03-31	2025-05-12	13F-HR	View on EDGAR
2024-12-31	2025-02-05	13F-HR	View on EDGAR

FAQ

What is Alta Partners Management Company, L.P. and what type of investor is it?

What are Alta Partners Management Company, L.P.'s largest equity positions?

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.