Stocks/Funds/CIK 2054419

Alta Partners Management Company, L.P.

long-term holderconcentrated
Quarterly 13F filings · Latest period 2026-03-31 · CIK 2054419
Assets
$151M
+261.4% YoY
Holdings
2
Lifetime alpha vs market
+98.91% annual
Average hold time
1.5 yr
median 1.5 yr

Quarterly history

Cum return +166% vs S&P +13% · α +153% lifetimeAUM $151M · peak $151MFlow $-0M (-0%)2024-122025-032025-062025-092025-122026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
+0.86%
adds when stocks drop
when a holding falls −10%+
Middle response
+0.00%
baseline attrition
Rally response
-2.10%
trims into rallies
when a holding rises +10%+

Top positions · 2

Ticker$ value% portYoYHold time
TYRATyra Biosciences, Inc.$146M97.0%+311.8%1.5 yr
VIRVir Biotechnology, Inc.$5M3.0%+38.3%1.5 yr

Portfolio composition (YoY)

Industry mix
Biotechnology100.0%+0.0pp$151M
Country
US100.0%+0.0pp
Top 5: 100.0% · Top 10: 100.0% · Top 25: 100.0%

Winners

TickerPrev $PnLYoY %
TYRA$38M+0.12B311.8%
VIR$3M+0.00B38.3%

Losers

TickerPrev $PnLYoY %

Top buys this quarter · 0

No buys this quarter

Top sells this quarter · 0

No sells this quarter

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$151M2+290.04%+17.59%+272.45%-0.00B
2025-12-31$104M2+82.43%+17.72%+64.71%-0.01B
2025-09-30$60M2+44.15%+8.12%+36.03%-0.00B
2025-06-30$42M2+0.92%+10.78%-9.86%-0.00B
2025-03-31$42M3-31.82%-4.27%-27.55%-0.00B
2024-12-31$63M3