Which closed-end funds own Upstream Bio Inc?
3 active closed-end funds report this security in their latest N-PORT filing, with a combined reported value of $602K. Security type: common equity. Country: United States. CUSIP 91678A107 · ISIN US91678A1079 · ticker UPB.
Holdings are historical filings (report dates Jun 30, 2026; N-PORT becomes public ~60 days after quarter end), not live positions. Weights are percent of each fund’s net assets. Different instruments of one issuer (shares, bonds, preferreds) are separate securities — see related securities below.
Funds holding this security
| Fund | Category | Weight | Value (USD) | Balance | Fund net assets | Prem/disc | Report date |
|---|---|---|---|---|---|---|---|
| BME BlackRock Health Sciences Trust | Healthcare | 0.04% | $208K | 30,052 sh | $573M | 3.9% discount | Jun 30, 2026 |
| BMEZ BlackRock Health Sciences Term Trust | Healthcare | 0.04% | $391K | 56,530 sh | $1.1B | NAV unavailable | Jun 30, 2026 |
| GRX Gabelli Healthcare & WellnessRx Trust | Healthcare | 0.00% | $2.8K | 400 sh | $228M | NAV unavailable | Jun 30, 2026 |
3 positions. Source: SEC Form N-PORT via market-data vendor re-serve. Funds without an N-PORT on file cannot appear here.
Also listed in filings as: UPSTREAM BIO INC.
Issuer-level search for “UPB” → · Compare two funds’ portfolios →