Alta Partners Management Company, L.P.
Portfolio value QoQ: -15.7% 13F does not disclose cash
Based on 13F long-equity holdings only (cash, bonds, shorts not disclosed)
Turnover Q2 2026: 0.0% Est. buys $0 · sells $0
Median holding: 6.0 quarters Tracked Q1 2025–Q2 2026 · 66.7% still held
Performance vs S&P 500
Annualized: +159.3% · S&P 500: +28.7%
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.
Sector breakdown
Full portfolio 2 positions
| Type | Streak | 8Q trend | |||||
|---|---|---|---|---|---|---|---|
| TYRA | $122,120,195 | 95.92% | 3,823,425 | $-24,316,983 | |||
| VIR | $5,196,054 | 4.08% | 509,917 | $627,198 | |||
| No matches | |||||||
Top movers (QoQ)
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.
| Security | Quarter | Shares before | Value before | Price since exit |
|---|---|---|---|---|
| ALLK | June 30, 2025 | 2,546,147 | $579,503 | No longer tracked |