BMO 2023-C4 Mortgage Trust Names New Special Servicer

What Happened

• BMO 2023-C4 Mortgage Trust filed an 8-K (Item 8.01) reporting that, effective September 1, 2026, C‑IV Asset Management LLC succeeded Greystone Servicing Company LLC as special servicer under the trust’s Pooling and Servicing Agreement (the “BMO 2023-C4 PSA” dated February 1, 2023).
• The assignment covers special servicing duties related to assets of the Issuing Entity that are serviced pursuant to the FIVE 2023‑V1 Mortgage Trust PSA, specifically the 575 Broadway mortgage loan and the Gilardian NYC Portfolio mortgage loan. An Assignment and Assumption Agreement (Special Servicing) dated September 1, 2026 is attached as Exhibit 20.1.

Key Details

• Effective date: September 1, 2026.
• Successor special servicer: C‑IV Asset Management LLC; predecessor: Greystone Servicing Company LLC.
• Affected assets named in the filing: the 575 Broadway mortgage loan and the Gilardian NYC Portfolio mortgage loan.
• Related document: Assignment and Assumption Agreement (Special Servicing) dated September 1, 2026 (Exhibit 20.1).

Why It Matters

• A change in the special servicer means a different firm will handle the trust’s special-servicing obligations for the named loans (e.g., workouts or enforcement actions under the PSA).
• The filing does not disclose any changes to payment terms, investor distributions, or other material financial effects; it only documents the servicer succession and the related assignment agreement. Investors should monitor future disclosures for any operational or cash‑flow impacts.