---
schema_version: "secwatch.filing_event.v1"
accession: "0001888524-25-017775"
form_type: "8-K"
ticker: null
cik: "0001631406"
company_name: "Morgan Stanley Bank of America Merrill Lynch Trust 2015-C21"
filed_at: "2025-10-09T23:59:59+00:00"
generated_at: "2026-05-17T04:11:40.032277+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# MSC 2015-C21 trust revises distributions for June-Sept 2025 due to servicer error on 555 11th St loan

## Summary
- Class AS had $135K underpayment in June, $777K overpayment in July, $382K underpayment in Aug, $260K underpayment in Sept.
- Class B had $564K overpayment in July, $168K overpayment in Aug, $98K overpayment in Sept.
- Class 555A had $28K underpayment in June, $94K underpayment in July, $42K underpayment in Aug, $32K underpayment in Sept.
- Class 555B had $43K underpayment in June, $147K underpayment in July, $65K underpayment in Aug, $49K underpayment in Sept.
- Revisions result from recalculation of amounts payable related to the 555 11th Street NW mortgage loan.

## SEC filing metadata
- accession: 0001888524-25-017775
- form_type: 8-K
- cik: 0001631406
- company_name: Morgan Stanley Bank of America Merrill Lynch Trust 2015-C21
- filed_at: 2025-10-09T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 6.04
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1631406/000188852425017775/0001888524-25-017775-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1631406/000188852425017775/msc15c21_8k-10082025.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001888524-25-017775
- JSON: https://secwatch.observer/filing/0001888524-25-017775.json
- Plain text: https://secwatch.observer/filing/0001888524-25-017775.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.