Servicer Shifts, Trustee Lawsuits Cloud BENCHMARK 2018-B6 Mortgage Trust

TL;DR

**BENCHMARK 2018-B6 is a hot potato of servicing changes and trustee lawsuits; steer clear until the dust settles on these operational risks.**

AI Summary

BENCHMARK 2018-B6 MORTGAGE TRUST, a securitization entity, filed its 10-K for the fiscal year ended December 31, 2025, primarily detailing changes in servicing arrangements and ongoing legal proceedings affecting its trustees and servicers. The trust itself does not report revenue or net income in the traditional sense, as it's a pass-through entity for mortgage-backed securities. Key business changes include the termination of Midland Loan Services as special servicer on May 10, 2023, and the appointment of K-Star Asset Management LLC. Additionally, Trimont LLC succeeded Wells Fargo Bank, National Association as servicer for the Aventura Mall mortgage loan (9.6% of initial pool balance) and as master servicer for the 636 11th Avenue (4.4%) and JAGR Hotel Portfolio (1.7%) mortgage loans, effective March 1, 2025. Risks are primarily associated with ongoing litigation against Wilmington Trust, National Association and U.S. Bank National Association, concerning alleged breaches of contract and fiduciary duties in other securitization transactions, which could impact their ability to perform duties for BENCHMARK 2018-B6. The strategic outlook focuses on the continued administration of its mortgage loan pool, with no significant obligors representing more than 5% of the pool assets, and no external credit enhancement or derivative instruments used for the certificates.

Why It Matters

This 10-K reveals significant changes in the servicing landscape for BENCHMARK 2018-B6 Mortgage Trust, with multiple servicers being replaced. For investors, these changes introduce potential operational risks and uncertainties regarding loan performance and recovery, especially given the ongoing legal challenges faced by key trustees like Wilmington Trust and U.S. Bank in other securitization deals. The competitive context shows a dynamic environment for mortgage servicing, with firms like Trimont LLC gaining market share. Employees of the involved servicing firms may experience integration challenges, while customers (borrowers) could see changes in their loan administration contacts. The broader market watches these shifts for signs of stress or efficiency in the commercial mortgage-backed securities (CMBS) sector.

Risk Assessment

Risk Level: high — The risk level is high due to extensive legal proceedings against key fiduciaries. Wilmington Trust, National Association, the trustee, is facing a civil complaint filed February 3, 2026, for unspecified damages related to alleged breaches of contract and duties in Tricolor Holdings, LLC securitizations. U.S. Bank National Association, a servicing function participant, is also embroiled in multiple lawsuits, including the NCMSLT Action filed March 9, 2018, concerning alleged misconduct in student loan-backed securities, and numerous RMBS trust litigations, creating significant counterparty risk for the trust.

Analyst Insight

Investors should closely monitor the legal proceedings against Wilmington Trust, National Association and U.S. Bank National Association, as adverse outcomes could impact their ability to fulfill their roles within BENCHMARK 2018-B6. Consider the potential for increased servicing costs or disruptions if these entities face significant penalties or operational constraints. Evaluate the credit quality of the underlying mortgage loans, especially those with new servicers like Trimont LLC, for any signs of deteriorating performance.

Key Numbers

• 9.6% — Aventura Mall mortgage loan (percentage of initial pool balance)
• 4.4% — 636 11th Avenue mortgage loan (percentage of initial pool balance)
• 1.7% — JAGR Hotel Portfolio mortgage loan (percentage of initial pool balance)
• 2.6% — TriBeCa House mortgage loan (percentage of initial pool balance)
• May 10, 2023 — Midland Loan Services termination (date of special servicer change)
• March 1, 2025 — Trimont LLC succession (date of servicer change for multiple loans)
• February 3, 2026 — Wilmington Trust lawsuit filing (date civil complaint served)
• March 9, 2018 — NCMSLT Action filing (date lawsuit filed against U.S. Bank)

Key Players & Entities

• BENCHMARK 2018-B6 MORTGAGE TRUST (company) — issuing entity
• Midland Loan Services (company) — terminated special servicer
• K-Star Asset Management LLC (company) — successor special servicer
• Trimont LLC (company) — successor servicer/master servicer
• Wells Fargo Bank, National Association (company) — replaced servicer/master servicer
• Wilmington Trust, National Association (company) — trustee facing civil complaint
• U.S. Bank National Association (company) — servicing function participant facing multiple lawsuits
• CWCapital Asset Management LLC (company) — special servicer facing litigation
• Aventura Mall mortgage loan (dollar_amount) — 9.6% of initial pool balance
• 636 11th Avenue mortgage loan (dollar_amount) — 4.4% of initial pool balance

FAQ

Risk Factors

• Litigation Against Trustees and Servicers [high — legal]: BENCHMARK 2018-B6 faces potential operational disruptions due to ongoing litigation against its trustees and servicers, Wilmington Trust, National Association and U.S. Bank National Association. These legal actions, including a civil complaint served on February 3, 2026, and the NCMSLT Action filed on March 9, 2018, allege breaches of contract and fiduciary duties in other securitization transactions. Such proceedings could impair the ability of these entities to fulfill their obligations to BENCHMARK 2018-B6.
• Servicer Changes and Potential Disruption [medium — operational]: The trust has experienced significant changes in its servicing arrangements, including the termination of Midland Loan Services as special servicer on May 10, 2023, and the appointment of K-Star Asset Management LLC. Furthermore, Trimont LLC succeeded Wells Fargo Bank, National Association as servicer for key loans, including the Aventura Mall mortgage loan (9.6% of initial pool balance), effective March 1, 2025. These transitions introduce operational risks and potential for service interruptions.

Industry Context

The commercial mortgage-backed securities (CMBS) market operates through complex securitization structures where loans are pooled and financed by issuing securities. The industry is heavily reliant on the performance of underlying real estate assets and the effective administration by servicers and trustees. Recent trends include increased scrutiny on servicer performance and potential legal challenges related to fiduciary duties, impacting investor confidence and operational stability.

Regulatory Implications

While BENCHMARK 2018-B6 MORTGAGE TRUST is a securitization vehicle and not directly regulated in the same way as a bank, its operations are indirectly affected by financial regulations governing the securitization market. Litigation against its key service providers, such as trustees and servicers, can lead to increased compliance costs and operational disruptions, potentially triggering closer regulatory oversight of the entities involved.

What Investors Should Do

1. Monitor litigation against Wilmington Trust and U.S. Bank
2. Assess the impact of servicer transitions
3. Review the underlying mortgage loan performance

Key Dates

• 2023-05-10: Midland Loan Services terminated as special servicer — Indicates a change in the management of distressed assets, potentially impacting recovery rates or resolution strategies.
• 2025-03-01: Trimont LLC succeeded Wells Fargo Bank, National Association as servicer for multiple loans — Significant servicer transition for substantial portions of the pool, including the Aventura Mall loan (9.6%), introducing potential operational adjustments.
• 2026-02-03: Civil complaint served against Wilmington Trust, National Association — Highlights ongoing legal risks associated with the trustee's performance in other transactions, which could indirectly affect the trust.
• 2018-03-09: NCMSLT Action filed against U.S. Bank National Association — Indicates a long-standing legal challenge against a key party involved in securitization, raising concerns about fiduciary duties and potential liabilities.
• 2018-10-09: Pooling and Servicing Agreement (Benchmark 2018-B6 PSA) filed — Establishes the foundational legal framework and parties involved in the trust's operations.

Glossary

Securitization Entity

A legal entity created to pool assets, such as mortgages, and issue securities backed by the cash flows from those assets. (BENCHMARK 2018-B6 MORTGAGE TRUST is a securitization entity, meaning it holds mortgage loans and issues securities to investors, acting as a pass-through vehicle.)

Pass-through Entity

An entity that does not pay income tax itself but passes income, losses, deductions, and credits through to its investors. (Explains why the trust does not report traditional revenue or net income, as its financial performance is tied directly to the underlying mortgage pool.)

Special Servicer

A party responsible for managing and resolving defaulted or specially serviced mortgage loans, often involving workouts, foreclosures, or modifications. (The change in special servicer from Midland Loan Services to K-Star Asset Management LLC is a key operational event for the trust.)

Master Servicer

The primary servicer responsible for the day-to-day administration of a pool of mortgage loans, including collecting payments and managing escrows. (The succession of Trimont LLC as master servicer for several significant loans highlights changes in the operational management of the trust's assets.)

Pooling and Servicing Agreement (PSA)

The primary legal document governing the terms and conditions of a mortgage-backed securities transaction, outlining the rights and responsibilities of all parties involved. (The PSA for Benchmark 2018-B6 is a critical exhibit that defines the trust's structure and operational rules.)

Trustee

A fiduciary responsible for holding the trust assets for the benefit of the certificateholders and ensuring the terms of the pooling and servicing agreement are met. (Wilmington Trust, National Association's role as trustee is central, and ongoing litigation against it poses a significant risk.)

Year-Over-Year Comparison

This 10-K filing for BENCHMARK 2018-B6 MORTGAGE TRUST primarily details changes in servicing arrangements and ongoing legal proceedings, rather than financial performance metrics, as it is a pass-through entity. Key events include the termination of Midland Loan Services as special servicer on May 10, 2023, and Trimont LLC succeeding Wells Fargo as servicer for significant loans effective March 1, 2025. The previous filing likely focused on the initial structure and operational setup, whereas this report emphasizes the evolving risk landscape due to servicer changes and litigation against key fiduciaries.

Filing Documents

• 2018-b6_-_10-k_-2025.htm (10-K) — 271KB
• ck0001751874-ex31.htm (EX-31) — 7KB
• ck0001751874-ex33_1.htm (EX-33.1) — 2021KB
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• 0001193125-26-133186.txt ( ) — 19490KB

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 Benchmark 2018-B6 Mortgage Trust 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) as trustee for the Aventura Mall mortgage loan under the Aventura Mall 2018-AVM TSA, (iii) as trustee for the 636 11th Avenue mortgage loan and the JAGR Hotel Portfolio mortgage loan under the Benchmark 2018-B4 PSA, and (iv) as trustee for the TriBeCa House mortgage loan under the COMM 2018-HOME 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 a

of Regulation AB

Item 1119 of Regulation AB Provided previously in the prospectus of the Registrant relating to the issuing entity and filed on October 9, 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 October 1, 2018 (the “Benchmark 2018-B6 PSA”), by and among Citigroup Commercial Mortgage Securities Inc., as depositor, KeyBank 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 October 9, 2018, and filed by the registrant on October 9, 2018 under Commission File No. 333-207132-19, and is incorporated by reference herein). (see Explanatory Note #1) 4.2 Trust and Servicing Agreement, dated as of June 29, 2018 (the “Aventura Mall 2018-AVM TSA”), by and among J.P. Morgan Chase Commercial Mortgage Securities Corp., as depositor, Trimont LLC (as successor to Wells Fargo Bank, National Association), as servicer, CWCapital Asset Management LLC, as special servicer, Park Bridge Lender Services LLC, as operating advisor, Wells Fargo Bank, National Association, as certificate administrator, and Wilmington Trust, National Association, as trustee (filed as Exhibit 4.2 to the registrant’s Current Report on Form 8-K dated October 9, 2018, and filed by the registrant on October 9, 2018 under Commission File No. 333-207132-19, and is incorporated by reference herein). (see Explanatory Note #2) 4.3 Pooling and Servicing Agreement, dated as of July 1, 2018 (the “Benchmark 2018-B4 PSA”), by and amon

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