CMBS Trust Sees Major Servicer Shake-Up, Trustee Litigation Looms

Citigroup Commercial Mortgage Trust 2018-C6 10-K Filing Summary
FieldDetail
CompanyCitigroup Commercial Mortgage Trust 2018-C6
Form Type10-K
Filed DateMar 31, 2026
Risk Levelmedium
Pages15
Reading Time18 min
Sentimentmixed

Sentiment: mixed

Topics: CMBS, Commercial Real Estate, Servicer Changes, Trustee Litigation, Mortgage-Backed Securities, Securitization, Risk Management

TL;DR

**Servicer changes and trustee lawsuits signal potential instability in this CMBS trust; proceed with caution.**

AI Summary

Citigroup Commercial Mortgage Trust 2018-C6's 10-K filing for the fiscal year ended December 31, 2025, primarily details significant changes in servicing entities for its commercial mortgage-backed securities (CMBS) portfolio. Trimont LLC succeeded Wells Fargo Bank, National Association as master servicer for the CGCMT 2018-C6 PSA and DBGS 2018-C1 PSA, effective March 1, 2025. K-Star Asset Management LLC replaced Midland Loan Services as special servicer under the CGCMT 2018-C6 PSA on May 5, 2023. The DUMBO Heights Portfolio mortgage loan, representing approximately 9.5% of the initial pool balance, saw two special servicer changes: Green Loan Services LLC replaced LNR Partners, LLC on November 9, 2023, and then Torchlight Loan Services, LLC replaced Green Loan Services LLC on December 9, 2025. The filing also discloses ongoing legal proceedings against Wilmington Trust, National Association and U.S. Bank National Association in their capacities as trustees for unrelated asset-backed securitization transactions, including RMBS and student loan trusts, which could indicate broader industry risks for trustees.

Why It Matters

This filing highlights significant operational shifts within the Citigroup Commercial Mortgage Trust 2018-C6, with multiple changes in master and special servicers. For investors, these changes can impact loan performance and recovery rates, especially for loans like the DUMBO Heights Portfolio (9.5% of initial pool balance) which experienced two special servicer changes in two years. The disclosed litigation against key entities like Wilmington Trust and U.S. Bank, while not directly related to this specific trust's performance, signals potential systemic risks and increased scrutiny on trustee responsibilities across the broader securitization market, potentially affecting investor confidence in similar CMBS structures.

Risk Assessment

Risk Level: medium — The risk level is medium due to the frequent changes in special servicers for significant mortgage loans, such as the DUMBO Heights Portfolio (9.5% of initial pool balance), which could indicate underlying performance issues or increased complexity in managing distressed assets. Additionally, the disclosed legal proceedings against Wilmington Trust, National Association and U.S. Bank National Association, while not directly against this trust, highlight potential systemic risks for trustees in the broader securitization market, which could indirectly impact the trust's operational stability or investor sentiment.

Analyst Insight

Investors should closely monitor the performance of the DUMBO Heights Portfolio and other large loans within the trust, given the recent special servicer changes. Furthermore, investors should assess the implications of the ongoing litigation against Wilmington Trust and U.S. Bank on their broader CMBS holdings, as these cases could set precedents for trustee liability.

Financial Highlights

debt To Equity
N/A
revenue
N/A
operating Margin
N/A
total Assets
N/A
total Debt
N/A
net Income
N/A
eps
N/A
gross Margin
N/A
cash Position
N/A
revenue Growth
N/A

Key Numbers

  • 9.5% — DUMBO Heights Portfolio mortgage loan (percentage of initial pool balance)
  • 7.2% — Liberty Portfolio mortgage loan (percentage of initial pool balance)
  • 1.9% — 192 Lexington Avenue mortgage loan (percentage of initial pool balance)
  • 4.1% — Shelbourne Global Portfolio I mortgage loan (percentage of initial pool balance)
  • 3.4% — Moffett Towers—Buildings E, F, G mortgage loan (percentage of initial pool balance)
  • 3.4% — Riverwalk II mortgage loan (percentage of initial pool balance)
  • 2.1% — Danbury Commerce Portfolio mortgage loan (percentage of initial pool balance)
  • 2025-12-09 — Torchlight Loan Services, LLC appointment (date of special servicer change for DUMBO Heights)
  • 2025-03-01 — Trimont LLC appointment (date of master servicer change for CGCMT 2018-C6 PSA)
  • 2026-02-03 — Wilmington Trust lawsuit filing (date of civil complaint against WTNA)

Key Players & Entities

  • Citigroup Commercial Mortgage Trust 2018-C6 (company) — issuing entity
  • Trimont LLC (company) — successor master servicer
  • Wells Fargo Bank, National Association (company) — former master servicer and certificate administrator
  • K-Star Asset Management LLC (company) — successor special servicer
  • Midland Loan Services (company) — former special servicer
  • DUMBO Heights Portfolio mortgage loan (dollar_amount) — approximately 9.5% of initial pool balance
  • Green Loan Services LLC (company) — former special servicer for DUMBO Heights Portfolio
  • Torchlight Loan Services, LLC (company) — successor special servicer for DUMBO Heights Portfolio
  • Wilmington Trust, National Association (company) — trustee facing civil complaint
  • U.S. Bank National Association (company) — servicing function participant facing lawsuits

FAQ

What were the key servicing changes for Citigroup Commercial Mortgage Trust 2018-C6 in 2025?

In 2025, Trimont LLC succeeded Wells Fargo Bank, National Association as master servicer for the CGCMT 2018-C6 PSA and DBGS 2018-C1 PSA, effective March 1, 2025. Additionally, Torchlight Loan Services, LLC was appointed as successor special servicer for the DUMBO Heights Portfolio mortgage loan on December 9, 2025, replacing Green Loan Services LLC.

Which mortgage loans in Citigroup Commercial Mortgage Trust 2018-C6 experienced special servicer changes?

The DUMBO Heights Portfolio mortgage loan, representing approximately 9.5% of the initial pool balance, experienced two special servicer changes. Green Loan Services LLC replaced LNR Partners, LLC on November 9, 2023, and then Torchlight Loan Services, LLC replaced Green Loan Services LLC on December 9, 2025.

What is the significance of the DUMBO Heights Portfolio mortgage loan to Citigroup Commercial Mortgage Trust 2018-C6?

The DUMBO Heights Portfolio mortgage loan is significant as it represented approximately 9.5% of the initial pool balance of the issuing entity. Its multiple special servicer changes could indicate heightened management attention or potential performance issues for a substantial asset within the trust.

Are there any legal proceedings affecting the trustees of Citigroup Commercial Mortgage Trust 2018-C6?

Yes, Wilmington Trust, National Association, as trustee for this trust, is facing a civil complaint filed on February 3, 2026, related to alleged breaches of contract and duties in unrelated Tricolor Holdings, LLC asset-backed securitization transactions. U.S. Bank National Association, a servicing function participant, is also involved in lawsuits concerning RMBS and student loan trusts.

What are the potential implications of the legal actions against Wilmington Trust and U.S. Bank for investors in Citigroup Commercial Mortgage Trust 2018-C6?

While the lawsuits against Wilmington Trust and U.S. Bank are not directly related to the performance of Citigroup Commercial Mortgage Trust 2018-C6, they highlight potential systemic risks for trustees in the broader securitization market. These cases could lead to increased scrutiny of trustee responsibilities, potentially impacting operational stability or investor confidence in similar CMBS structures.

What percentage of the initial pool balance did the Liberty Portfolio mortgage loan represent?

The Liberty Portfolio mortgage loan represented approximately 7.2% of the initial pool balance of the issuing entity. It is part of a loan combination with companion loans held outside the issuing entity and serviced under the Benchmark 2018-B7 PSA.

Who are the sponsors of Citigroup Commercial Mortgage Trust 2018-C6?

The sponsors of Citigroup Commercial Mortgage Trust 2018-C6 include Citi Real Estate Funding Inc., Rialto Mortgage Finance, LLC, Ladder Capital Finance LLC, and Cantor Commercial Real Estate Lending, L.P.

Does Citigroup Commercial Mortgage Trust 2018-C6 use external credit enhancement or derivative instruments?

No, the filing explicitly states that no entity or group of affiliated entities provides any external credit enhancement, uses any derivative instruments, or other support for the certificates within this transaction, as per Item 1114(b)(2) and Item 1115(b) of Regulation AB.

Why are some servicer compliance statements not included in this 10-K for Citigroup Commercial Mortgage Trust 2018-C6?

Servicer compliance statements from entities like LNR Partners, LLC, Green Loan Services LLC, Midland Loan Services, Argentic Services Company LP, and Torchlight Loan Services, LLC are not included because each is an unaffiliated party that services less than 10% of the pool assets, and therefore does not meet the criteria of a 'servicer' under Item 1108(a)(2)(i) through (iii) of Regulation AB.

What is the primary business of Citigroup Commercial Mortgage Trust 2018-C6?

Citigroup Commercial Mortgage Trust 2018-C6 is an issuing entity for commercial mortgage-backed securities (CMBS). Its primary business involves the securitization and management of a pool of commercial mortgage loans, as evidenced by the various pooling and servicing agreements and the roles of master and special servicers.

Risk Factors

  • Servicing Entity Changes [medium — operational]: The trust experienced multiple changes in key servicing roles. Trimont LLC replaced Wells Fargo Bank, National Association as master servicer for the CGCMT 2018-C6 PSA effective March 1, 2025. K-Star Asset Management LLC replaced Midland Loan Services as special servicer for the CGCMT 2018-C6 PSA on May 5, 2023. The DUMBO Heights Portfolio loan saw two special servicer changes in late 2023 and late 2025, with Torchlight Loan Services, LLC ultimately replacing Green Loan Services LLC on December 9, 2025.
  • Trustee Legal Proceedings [medium — legal]: The filing discloses ongoing legal proceedings against Wilmington Trust, National Association and U.S. Bank National Association in their capacities as trustees for unrelated asset-backed securitization transactions. These include RMBS and student loan trusts, indicating potential systemic risks associated with trustee roles in the broader securitization market.

Industry Context

The commercial mortgage-backed securities (CMBS) market is characterized by complex legal structures and a reliance on specialized servicing entities. Changes in master and special servicers, as seen with Citigroup Commercial Mortgage Trust 2018-C6, are common as portfolios age or encounter performance issues. The industry also faces scrutiny regarding the legal responsibilities and potential liabilities of trustees, as evidenced by ongoing litigation against major financial institutions.

Regulatory Implications

The disclosed legal proceedings against trustees highlight potential regulatory risks and the importance of robust governance and oversight within the securitization industry. Investors should monitor these cases for any precedent-setting rulings that could impact the operational framework or legal standing of trust entities.

What Investors Should Do

  1. Monitor Servicer Performance
  2. Assess Trustee Risk
  3. Review Loan-Level Performance

Key Dates

  • 2025-03-01: Trimont LLC appointed Master Servicer — Replaced Wells Fargo Bank, National Association for CGCMT 2018-C6 PSA, indicating a shift in primary servicing operations.
  • 2023-05-05: K-Star Asset Management LLC appointed Special Servicer — Replaced Midland Loan Services for CGCMT 2018-C6 PSA, signaling a change in distressed loan management.
  • 2025-12-09: Torchlight Loan Services, LLC appointed Special Servicer for DUMBO Heights Portfolio — This is the second special servicer change for this specific loan within a short period, highlighting potential complexities or issues with its management.
  • 2023-11-09: Green Loan Services LLC appointed Special Servicer for DUMBO Heights Portfolio — Initial change in special servicer for the DUMBO Heights loan, preceding the subsequent change to Torchlight Loan Services, LLC.
  • 2026-02-03: Wilmington Trust lawsuit filing — Indicates ongoing legal challenges involving trustees, which could have broader implications for the stability and operational integrity of securitization structures.

Glossary

PSA
Pooling and Servicing Agreement. This is the primary contract that governs the terms and conditions of a securitization, outlining the rights and responsibilities of the depositor, servicers, trustee, and other parties involved. (The filing details changes in servicers under specific PSAs (CGCMT 2018-C6 PSA, Benchmark 2018-B7 PSA), which are central to the operational structure of the trust.)
Master Servicer
The entity responsible for the day-to-day administration of the mortgage loans in a securitized pool, including collecting payments, managing escrow accounts, and reporting to the trustee and certificate holders. (The change from Wells Fargo to Trimont LLC for the CGCMT 2018-C6 PSA is a key operational event disclosed in the filing.)
Special Servicer
The entity responsible for managing defaulted or specially serviced mortgage loans, often involving loan modifications, foreclosure, or other workout strategies. (Multiple changes in special servicers, particularly for the DUMBO Heights Portfolio loan, highlight potential distress or complexity in managing certain assets within the pool.)
Trustee
A financial institution appointed to hold the trust assets for the benefit of the certificate holders and to oversee the administration of the securitization according to the PSA. (The mention of legal proceedings against trustees like Wilmington Trust and U.S. Bank suggests potential risks related to the oversight and legal standing of these critical parties.)
CMBS
Commercial Mortgage-Backed Securities. These are securities backed by pools of commercial real estate loans. (This filing pertains to a specific CMBS trust (CITIGROUP COMMERCIAL MORTGAGE TRUST 2018-C6), and the disclosed events are directly relevant to its performance and operational stability.)
DUMBO Heights Portfolio Mortgage Loan
A specific, significant mortgage loan within the CGCMT 2018-C6 trust, representing approximately 9.5% of the initial pool balance. (This loan has experienced multiple special servicer changes, drawing attention to its performance and the effectiveness of its management.)

Year-Over-Year Comparison

This 10-K filing for CITIGROUP COMMERCIAL MORTGAGE TRUST 2018-C6 primarily focuses on changes in servicing entities and ongoing legal proceedings, rather than a direct comparison of financial metrics to a prior year. Key operational shifts include the appointment of Trimont LLC as master servicer and K-Star Asset Management LLC as special servicer. The disclosure of legal actions against trustees suggests a potential increase in legal and operational risks compared to previous periods where such significant litigation was not highlighted.

Filing Stats: 4,450 words · 18 min read · ~15 pages · Grade level 12.1 · Accepted 2026-03-31 06:38:54

Filing Documents

Business

Item 1. Business. Omitted.

Risk Factors

Item 1A. Risk Factors. Omitted.

Unresolved Staff Comments

Item 1B. Unresolved Staff Comments. None.

Cybersecurity

Item 1C. Cybersecurity. Omitted.

Properties

Item 2. Properties . Omitted.

Legal Proceedings

Item 3. Legal Proceedings. Omitted.

Mine Safety Disclosures

Item 4. Mine Safety Disclosures. Not applicable. PART II Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities. Omitted.

[Reserved]

Item 6. [Reserved] Omitted.

Management’s Discussion and Analysis of Financial Condition and Results of Operations

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations. Omitted.

Quantitative and Qualitative Disclosures About Market Risk

Item 7A. Quantitative and Qualitative Disclosures About Market Risk. Omitted.

Financial Statements and Supplementary Data

Item 8. Financial Statements and Supplementary Data. Omitted.

Changes in and Disagreements With Accountants on Accounting and Financial Disclosure

Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure. Omitted.

Controls and Procedures

Item 9A. Controls and Procedures. Omitted.

Other Information

Item 9B. Other Information. None.

Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections. Not applicable. PART III

Directors, Executive Officers and Corporate Governance

Item 10. Directors, Executive Officers and Corporate Governance. Omitted.

Executive Compensation

Item 11. Executive Compensation. Omitted.

Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters. Omitted.

Certain Relationships and Related Transactions, and Director Independence

Item 13. Certain Relationships and Related Transactions, and Director Independence. Omitted.

Principal Accountant Fees and Services

Item 14. Principal Accountant Fees and Services. Omitted. ADDITIONAL DISCLOSURE ITEMS REQUIRED BY GENERAL INSTRUCTION J(2)

(b) of Regulation AB

Item 1112(b) of Regulation AB No mortgage loan in the pool assets for Citigroup Commercial Mortgage Trust 2018-C6 constitutes a significant obligor within the meaning of Item 1101(k)(2) of Regulation AB.

(b)(2) and Item 1115(b) of Regulation AB

Item 1114(b)(2) and Item 1115(b) of Regulation AB No entity or group of affiliated entities provides any external credit enhancement, uses any derivative instruments or other support for the certificates within this transaction.

of Regulation AB

Item 1117 of Regulation AB Disclosure from Wilmington Trust, National Association (“WTNA”) (i) as trustee, (ii) s trustee for the Moffett Towers—Buildings E, F, G mortgage loan under the DBGS 2018-C1 PSA and (iii) as trustee for the Danbury Commerce Portfolio mortgage loan under the WFCM 2018-C48 PSA: On February 3, 2026, certain investors served WTNA with a civil complaint, filed in the Supreme Court of the State of New York, County of New York, for an unspecified amount of damages arising from alleged breaches of contract and duties related to WTNA’s roles as custodian and indenture trustee for certain Tricolor Holdings, LLC asset-backed securitization transactions. The plaintiffs generally assert causes of action related to WTNA’s purported failure to comply with certain provisions related to waterfall payments, servicing transition costs and post-event of default duties and related to WTNA’s purported failure to perform certain actions as custodian with respect to the related receivables. WTNA intends to vigorously defend itself against this legal action. Disclosure from U.S. Bank National Association (“U.S. Bank”), as servicing function participant: U.S. Bank and other large financial institutions have been sued in their capacity as trustee or successor trustee for certain residential mortgage backed securities (“RMBS”) trusts. The complaints, primarily filed by investors or investor groups against U.S. Bank and similar institutions, allege the trustees caused losses to investors as a result of alleged failures by the sponsors, mortgage loan sellers and servicers to comply with the governing agreements for these RMBS trusts. Plaintiffs generally assert causes of action based upon the trustees’ purported failures to enforce repurchase obligations of mortgage loan sellers for alleged breaches of representations and warranties, notify securityholders of purported events of default

of Regulation AB

Item 1119 of Regulation AB Provided previously in the prospectus of the Registrant relating to the issuing entity and filed on December 11, 2018 pursuant to Rule 424(b)(2) of the Securities Act of 1933, as amended.

of Regulation AB

Item 1122 of Regulation AB The reports on assessment of compliance with servicing criteria for asset-backed securities and related attestation reports are attached hereto under Item 15.

of Regulation AB

Item 1123 of Regulation AB The servicer compliance statements are attached hereto under Item 15. PART IV

Exhibits and Financial Statement Schedules

Item 15. Exhibits and Financial Statement Schedules. (a) List the following documents filed as a part of the report: (1) Not Applicable (2) Not Applicable (3) Exhibits listed below are either included or incorporated by reference as indicated below: Exhibit Number Description 4.1 Pooling and Servicing Agreement, dated as of December 1, 2018 (the “CGCMT 2018-C6 PSA”), by and among Citigroup Commercial Mortgage Securities Inc., as depositor, Trimont LLC (as successor to Wells Fargo Bank, National Association), as master servicer, K-Star Asset Management LLC (as successor to Midland Loan Services, a Division of PNC Bank, National Association), as special servicer, Park Bridge Lender Services LLC, as operating advisor and asset representations reviewer, Citibank, N.A., as certificate administrator, and Wilmington Trust, National Association, as trustee (filed as Exhibit 4.1 to the registrant’s Current Report on Form 8-K dated December 11, 2018, and filed by the registrant on December 11, 2018 under Commission File No. 333-207132-20, and is incorporated by reference herein). (see Explanatory Note #1) 4.2 Pooling and Servicing Agreement, dated as of November 1, 2018 (the “Benchmark 2018-B7 PSA”), by and among Deutsche Mortgage & Asset Receiving Corporation, as depositor, KeyBank National Association, as master servicer, LNR Partners, LLC, as special servicer except with respect to the DUMBO Heights Portfolio Mortgage Loan, Torchlight Loan Services, LLC (as successor to Green Loan Services LLC as successor to LNR Partners, LLC), as special servicer with respect to the DUMBO Heights Portfolio Mortgage Loan, Park Bridge Lender Services LLC, as operating advisor and asset representations reviewer, Wells Fargo Bank, National Association, as certificate administrator, paying agent and custodian, and Wells Fargo Bank, National Association, as trustee (filed as Exhibit 4.2 to the registrant’s Current Report on Form 8-K

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