Upgrade Master Pass-Thru Trust Upgrade Master Pass-Thru Trust Series 2025-ST8 is a security (CUSIP 91535UAD8) tracked across SEC portfolio filings. 2 registered fund positions totaling $272K via N-PORT as of 2026-03-31.
| Fund | Registrant | Value | % of fund |
|---|---|---|---|
| BlackRock Multi-Sector Income Trust | BlackRock Multi-Sector Income Trust | $149K | 1.95% |
| BlackRock Core Bond Trust | BlackRock Core Bond Trust | $123K | 1.76% |