Deutsche Alt-B Securities Mortgage Loan Trust Deutsche Alt-B Securities Mortgage Loan Trust, Series 2006-AB4, Class A4B is a security (CUSIP 251513AZ0) tracked across SEC portfolio filings. 1 registered fund positions totaling $1.5M via N-PORT as of 2026-03-31.
| Fund | Registrant | Value | % of fund |
|---|---|---|---|
| Putnam Mortgage Securities Fund | Putnam Mortgage Securities Fund | $1.5M | 37.98% |