# BENCHMARK Mortgage Trust Benchmark 2021-B28 Mortgage Trust

BENCHMARK Mortgage Trust Benchmark 2021-B28 Mortgage Trust is a security (CUSIP 08163GAZ3) tracked across SEC portfolio filings. 4 registered fund positions totaling $6.5M via N-PORT as of 2026-05-31.

## Summary

- Issuer: BENCHMARK Mortgage Trust
- Class: Benchmark 2021-B28 Mortgage Trust
- CUSIP: 08163GAZ3
- Asset category: ABS-MBS
- 13F holders: 0
- N-PORT fund positions: 4
- N-PORT value: $6.5M
- N-PORT report: 2026-05-31

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [DoubleLine Core Fixed Income Fund](https://search.stillhousedata.com/fund/S000028164) | DoubleLine Funds Trust | $4.0M | 5.87% |
| [MFS Limited Maturity Fund](https://search.stillhousedata.com/fund/S000002495) | MFS Series Trust IX | $2.3M | 7.00% |
| MFS CHARTER INCOME TRUST | MFS CHARTER INCOME TRUST | $100K | 3.68% |
| MFS GOVERNMENT MARKETS INCOME TRUST | MFS GOVERNMENT MARKETS INCOME TRUST | $94K | 9.46% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/08163GAZ3.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.