Institutional Manager · CIK 0002054419
Alta Partners Management Company, L.P.
JACKSON, WY · File #028-24773
Latest AUM
$103.6M
Positions
2
Top-10 Concentration
100.0%
Filings
5
Portfolio Value Over Time
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| REDUCE | TYRA BIOSCIENCES INC | TYRA | -256,871 | -$6.8M | +$50.2M |
| REDUCE | VIR BIOTECHNOLOGY INC | VIR | 0 | $0 | +$163,174 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 20252 pos · $103.6M
- 13F HOLDINGS REPORTQ/E Sep 20252 pos · $60.0M
- 13F HOLDINGS REPORTQ/E Jun 20252 pos · $41.6M
- 13F HOLDINGS REPORTQ/E Mar 20253 pos · $41.8M
- 13F HOLDINGS REPORTQ/E Dec 20243 pos · $63.4M
Top 2 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | TYRA BIOSCIENCES INC | TYRA | 3,823,425 | $100.5M | 97.03% |
| 2 | VIR BIOTECHNOLOGY INC | VIR | 509,917 | $3.1M | 2.97% |