Alta Partners Management Company, L.P.

CIK 2054419 · View on SEC EDGAR ↗

Portfolio value
$127.3M
#7,876 of 9,443 by 13F value · top 83.4%
Positions
2
As of
June 30, 2026

Portfolio value QoQ: -15.7% 13F does not disclose cash

Top 10 holdings weight
100.00%
Top 25 holdings weight
100.00%
Positions above 1%
2
Effective number of positions
1.1

Based on 13F long-equity holdings only (cash, bonds, shorts not disclosed)

Turnover Q2 2026: 0.0% Est. buys $0 · sells $0

Median holding: 7.0 quarters Tracked Q4 2024–Q2 2026 · 66.7% still held

New positions
0
Increased
0
Decreased
0
Closed
1
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Performance vs S&P 500

Tracked Q4 2024–Q2 2026
+124.2%
S&P 500 total return (same window)
+28.1%
Excess return
+96.1%

Annualized: +71.6% · S&P 500: +18.0%

Approximates a buy-and-hold portfolio built from quarterly SEC 13F snapshots. Excludes cash, short positions, options/derivatives, and non-13(f) securities — reflects the disclosed long-equity book only, not total fund AUM. SEC filing lag is up to 45 days; this is not a real-time-copyable timing.

Priceable coverage: 99.2% · Options excluded: 0.0%

Sector breakdown

Healthcare
100.0%

Full portfolio 2 positions

Type Streak 8Q trend
TYRA Tyra Biosciences, Inc. - Common Stock $122,120,195 95.92% 3,823,425 $-24,316,983
VIR Vir Biotechnology, Inc. - Common Stock $5,196,054 4.08% 509,917 $627,198

Top movers (QoQ)

Security Action Shares Δ Value Δ
TYRA Price move only +0 -$24.3M
VIR Price move only +0 +$627K

Exited positions

Includes corporate events (mergers, delistings) — not all exits are sells

Closed positions reflect 13F reporting changes; for index managers these are often mechanical (delisting, M&A, index rebalancing), not active decisions.

SecurityQuarter Shares before Value before Price since exit
ALLK June 30, 2025 2,546,147 $579,503 No longer tracked