Wells Fargo Commercial Mortgage Trust 2017-RB1 filed a Form 8-K on September 1, 2026, announcing a change in the entity responsible for special servicing the trust’s assets. The filing indicates that C-IV Asset Management LLC (C-IV AM) will replace Greystone Servicing Company LLC as the special servicer under the pooling and servicing agreement.

The transition is the result of a sale transaction in which Greystone sold and conveyed substantially all assets of its special servicing division to C-IV AM on September 1, 2026. C-IV AM, a wholly-owned subsidiary of C-IV Capital Partners LLC, assumed all duties, responsibilities, and liabilities associated with the special servicing role.

C-IV AM has indicated that the key employees previously performing duties for Greystone have been transferred to C-IV AM or its affiliate and will continue in similar roles. The company’s principal office is located in Irving, Texas. C-IV AM holds special servicer ratings of “MOR CS2” from Morningstar DBRS and “CSS2” from Fitch, and is listed as a U.S. Commercial Mortgage Special Servicer by S&P.

The filing details the portfolio that is being transferred. As of June 30, 2026, Greystone was the named special servicer for approximately 60 transactions, representing about 1,928 first-lien mortgage loans with an aggregate stated principal balance of approximately $20.7 billion. Of these, 33 are Commercial Mortgage-Backed Securities (CMBS) transactions with a balance of approximately $14.2 billion. The remaining assets are a mix of Freddie Mac securitizations, single-asset single-borrower securitizations, and other income-producing property types.

As of the same date, approximately 108 assets with a principal balance of about $2.1 billion were in active special servicing. C-IV AM noted that since its inception in 2002, it has resolved or participated in the resolution of 6,017 assets with an aggregate principal balance of approximately $60.7 billion.

The filing also provides historical data on the portfolio's size. As of December 31, 2025, the named specially serviced portfolio had an aggregate unpaid principal balance of approximately $26.9 billion, with actively specially serviced assets totaling about $2.0 billion.

C-IV AM stated that it has not been the subject of a servicer event of default or termination event in any securitization transaction for which it acted as special servicer. The company also noted that it is an affiliate of C-III High Yield Real Estate Debt Fund IV TIER Holdings Inc., which has purchased bonds in this transaction and serves as the directing certificateholder.