---
schema_version: "secwatch.filing_event.v1"
accession: "0001888524-26-016559"
form_type: "8-K"
ticker: null
cik: "0001985684"
company_name: "BBCMS Mortgage Trust 2023-C21"
filed_at: "2026-09-02T14:26:13+00:00"
generated_at: "2026-09-02T14:27:30.897454+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Greystone special servicing division sold to C-IV AM; assumes servicer role for BBCMS 2023-C21

## Summary
- Greystone sold its special servicing division to C-IV Asset Management LLC effective Sept 1, 2026; C-IV AM assumed all special servicer duties for the 11 West 42nd Street Mortgage Loan.
- C-IV AM is a wholly-owned subsidiary of C-IV Capital Partners LLC; key Greystone special servicing employees transferred to C-IV AM.
- As of June 30, 2026, transferred portfolio: ~60 transactions, ~1,928 first-lien loans, ~$20.7B aggregate principal; ~$2.1B in active special servicing.
- C-IV AM holds ratings MOR CS2 (Morningstar DBRS) and CSS2 (Fitch); on S&P Select Servicer list ranked 'Average; Ranking Watch Positive'.
- C-IV AM has no servicer event of default or termination event; no material legal proceedings pending.

## SEC filing metadata
- accession: 0001888524-26-016559
- form_type: 8-K
- cik: 0001985684
- company_name: BBCMS Mortgage Trust 2023-C21
- filed_at: 2026-09-02T14:26:13+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 6.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1985684/000188852426016559/0001888524-26-016559-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1985684/000188852426016559/bcr23c21_8k-09012026.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001888524-26-016559
- JSON: https://secwatch.observer/filing/0001888524-26-016559.json
- Plain text: https://secwatch.observer/filing/0001888524-26-016559.txt

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