**UNITED STATESSECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 10-K**

(Mark One)

**x****  ANNUAL REPORT PURSUANT TO SECTION13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934**

**For the fiscal year ended December 31, 2021or**

**o**** ****TRANSITIONREPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934**

**For the transition period from _____ to _____Commission file number of the issuing entity: 333-207340-04**

**Central Index Key Number of the issuing entity:0001716263**

**UBS Commercial Mortgage Trust2017-C4**

**(exact name of the issuing entity as specified in itscharter)**

** **

**Central Index Key Number of the depositor: 0001532799**

**UBS Commercial MortgageSecuritization Corp.**

**(exact name of the depositor as specified in itscharter)**

** **

**Central Index Key Number of the sponsor: 0001685185**

**UBS AG, acting through its branchlocated at 1285 Avenue of the Americas, New York, New York**

**(exact name of the sponsor as specified in its charter)**

** **

**Central Index Key Number of the sponsor: 0001238163**

**Société Générale, New York Branch**

**(exact name of the sponsor as specified in its charter)**

** **

**Central Index Key Number of the sponsor: 0001541468**

**Ladder Capital Finance LLC**

**(exact name of the sponsor as specified in its charter)**

** **

**Central Index Key Number of the sponsor: 0001592182**

**LMF Commercial, LLC**

**(exact name of the sponsor as specified in its charter)**

**(formerly known as RialtoMortgage Finance, LLC)**

** **

**Central Index Key Number of the sponsor: 0001548567**

**CIBC Inc.**

**(exact name of the sponsor as specified in its charter)**

** **

**Central Index Key Number of the sponsor: 0001542256**

**Natixis Real Estate Capital LLC**

**(exact name of the sponsor as specified in its charter)**

** **

| **New York****(State or other jurisdiction of  incorporation or organization of**

**the issuing entity)** | **38-4046694**

**38-4046695**

**38-7187327**

**(I.R.S. Employer**

**Identification Numbers)** |
|------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------|

**c/o Wells Fargo Bank, National Association**

**as Certificate Administrator**

**9062 Old Annapolis Road**

**Columbia, MD**

**(Address of principal executiveoffices of the issuing entity)**

**21045**

**(Zip Code)**

**Registrant’s telephone number,including area code:**

**(212) 713-2000**

Securities registered pursuant to Section 12(b) of the Act:

| Title of each class | Trading Symbol(s) | Name of each  exchange on which registered |
|---------------------|-------------------|--------------------------------------------|
| None                |              |                                       |

 

Securities registered pursuant to Section 12(g) of theAct:  None.

Indicate by check mark if the registrant is a well-knownseasoned issuer, as defined in Rule 405 of the Securities Act.  o Yes ⌧No

Indicate by check mark if the registrant is not required tofile reports pursuant to Section 13 or Section 15(d) of the Act.  o Yes ⌧No

Indicate by check mark whether the registrant (1) has filedall reports required to be filed by Section 13 or 15(d) of the SecuritiesExchange Act of 1934 during the preceding 12 months (or for such shorter periodthat the registrant was required to file such reports), and (2) has beensubject to such filing requirements for the past 90 days.  ⌧ Yes oNo

Indicate by check mark whether the registrant has submittedelectronically and posted on its corporate Web site, if any, every InteractiveData File required to be submitted and posted pursuant to Rule 405 ofRegulation S-T (Section 232.405 of this chapter) during the preceding 12 months(or for such shorter period that the registrant was required to submit and postsuch files).

Not applicable.

Indicate by check mark if disclosure of delinquent filerspursuant to Item 405 of Regulation S-K (Section 229.405 of this chapter) is notcontained herein, and will not be contained, to the best of registrant’sknowledge, in definitive proxy or information statements incorporated byreference in Part III of this Form 10-K or any amendment to this Form10-K.   

Not applicable.

Indicate by check mark whether the registrant is a largeaccelerated filer, an accelerated filer, a non-accelerated filer, a smallerreporting company, or an emerging growth company. See the definitions of “largeaccelerated filer,” “accelerated filer,” “smaller reporting company,” and“emerging growth company” in Rule 12b-2 of the Exchange Act.

Large acceleratedfiler        o                                                                                                       Acceleratedfiler                                     o

Non-acceleratedfiler          ⌧  (Do not check if asmaller reporting company)                          Smaller reporting company                    o

                                                                                                                                                       Emerging growthcompany                    o

If an emerging growth company, indicate by check mark if theregistrant has elected not to use the extended transition period for complyingwith any new or revised financial accounting standards provided pursuant toSection 13(a) of the Exchange Act.  o

Indicate by check mark whether the registrant has filed areport on and attestation to its management’s assessment of the effectivenessof its internal control over financial reporting under Section 404(b) of theSarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firmthat prepared or issued its audit report. o

Indicate by check mark whether the registrant is a shell company(as defined in Rule 12b-2 of the Act).  oYes ⌧ No

State the aggregate market value of the voting and non-votingcommon equity held by non-affiliates computed by reference to the price atwhich the common equity was last sold, or the average bid and asked price ofsuch common equity, as of the last business day of the registrant’s mostrecently completed second fiscal quarter.

Not applicable.

Indicate by check mark whether the registrant has filed alldocuments and reports required to be filed by Section 12, 13 or 15(d) of theSecurities Exchange Act of 1934 subsequent to the distribution of securitiesunder a plan confirmed by a court.  oYes oNo

Not applicable.

Indicate the number of shares outstanding of each of theregistrant’s classes of common stock, as of the latest practicable date.

Not applicable.

**DOCUMENTS INCORPORATED BY REFERENCE**

** **

List hereunder the following documents if incorporated byreference and the Part of the Form 10-K (e.g., Part I, Part II, etc.) intowhich the document is incorporated: (1) Any annual report to security holders;(2) Any proxy or information statement; and (3) Any prospectus filed pursuantto Rule 424(b) or (c) under the Securities Act of 1933. The listed documentsshould be clearly described for identification purposes (e.g., annual report tosecurity holders for fiscal year ended December 24, 1980).

Not applicable.

 

** **

**EXPLANATORY NOTES**

The District Mortgage Loan, the MeridianSunrise Village Mortgage Loan, the Bank of America Office Campus Building 600 MortgageLoan and the DoubleTree Berkeley Marina Mortgage Loan, which constitutedapproximately 4.9%, 3.1%, 2.4% and 1.7%, respectively, of the asset pool of theissuing entity as of its cut-off date, are each an asset of the issuing entityand are each part of a loan combination that includes (a) with respect to TheDistrict Mortgage Loan, three other *pari passu* loans, which are notassets of the issuing entity, (b) with respect to the Meridian Sunrise VillageMortgage Loan, two other *pari passu* loans, which are not assets of theissuing entity, (c) with respect to the Bank of America Office Campus Building600 Mortgage Loan, one other *pari passu* loan, which is not an asset ofthe issuing entity and (d) with respect to the DoubleTree Berkeley MarinaMortgage Loan, three other *pari passu* loans, which are not assets of theissuing entity. These loan combinations, including The District Mortgage Loan,the Meridian Sunrise Village Mortgage Loan, the Bank of America Office CampusBuilding 600 Mortgage Loan and the DoubleTree Berkeley Marina Mortgage Loan,are being serviced and administered pursuant to the Pooling and ServicingAgreement, which is incorporated by reference as Exhibit 4.1 to this AnnualReport on Form 10-K. 

The Exhibit Index describes exhibitsprovided by certain parties (in their capacities indicated on the ExhibitIndex) with respect to the 245 Park Avenue Mortgage Loan, which constitutedapproximately 3.8% of the asset pool of the issuing entity as of its cut-offdate.  The 245 Park Avenue Mortgage Loan is an asset of the issuing entityand is part of a loan combination that includes the 245 Park Avenue MortgageLoan,  twenty-one other *pari passu* loans and five subordinatecompanion loans, which are not assets of the issuing entity. A *pari passu*portion of the loan combination was securitized in the 245 Park Avenue Trust2017-245P transaction (the “245 Park Avenue Trust 2017-245P Transaction”).This loan combination, including the 245 Park Avenue Mortgage Loan, is beingserviced and administered pursuant to the trust and servicing agreement for the245 Park Avenue Trust 2017-245P Transaction, which is incorporated by referenceas Exhibit 4.2 to this Annual Report on Form 10-K.

The Exhibit Index describesexhibits provided by certain parties (in their capacities indicated on theExhibit Index) with respect to the Del Amo Fashion Center Mortgage Loan, whichconstituted approximately 0.6% of the asset pool of the issuing entity as ofits cut-off date.  The Del Amo Fashion Center Mortgage Loan is an asset ofthe issuing entity and is part of a loan combination that includes the Del AmoFashion Center Mortgage Loan,  thirty-two other *pari passu* loansand twelve subordinate companion loans, which are not assets of the issuingentity. A *pari passu* portion of the loan combination was securitized inthe Del Amo Fashion Center Trust 2017-AMO transaction (the “DAFC 2017-AMOTransaction”). This loan combination, including the Del Amo Fashion CenterMortgage Loan, is being serviced and administered pursuant to the trust andservicing agreement for the DAFC 2017-AMO Transaction, which is incorporated byreference as Exhibit 4.3 to this Annual Report on Form 10-K.

The Exhibit Index describesexhibits provided by certain parties (in their capacities indicated on theExhibit Index) with respect to the Park West Village Mortgage Loan and the TZAMultifamily Portfolio I Mortgage Loan, which constituted approximately 4.9% and1.0%, respectively, of the asset pool of the issuing entity as of its cut-offdate.  The Park West Village Mortgage Loan and the TZA MultifamilyPortfolio I Mortgage Loan are each an asset of the issuing entity and are eachpart of a loan combination that includes (a) with respect to the Park WestVillage Mortgage Loan, three other *pari passu* loans and threesubordinate companion loans, which are not assets of the issuing entity or (b)with respect to the TZA Multifamily Portfolio I Mortgage Loan, three other *paripassu* loans, which are not assets of the issuing entity. A *pari passu*portion of each loan combination was securitized in the UBS Commercial MortgageTrust 2017-C2 transaction, Commission File Number 333-207340-02 (the “UBS2017-C2 Transaction”). These loan combinations, including the Park WestVillage Mortgage Loan and the TZA Multifamily Portfolio I Mortgage Loan, arebeing serviced and administered pursuant to the pooling and servicing agreementfor the UBS 2017-C2 Transaction, which is incorporated by reference as Exhibit4.4 to this Annual Report on Form 10-K.

The Exhibit Index describesexhibits provided by certain parties (in their capacities indicated on theExhibit Index) with respect to the 237 Park Avenue Mortgage Loan, whichconstituted approximately 6.1% of the asset pool of the issuing entity as ofits cut-off date.  The 237 Park Avenue Mortgage Loan is an asset of theissuing entity and is part of a loan combination that includes the 237 ParkAvenue Mortgage Loan,  twelve other *pari passu* loans and foursubordinate companion loans, which are not assets of the issuing entity. A *paripassu* portion of the loan combination was securitized in the MSSG Trust2017-237P transaction (the “MSSG Trust 2017-237P Transaction”). Thisloan combination, including the 237 Park Avenue Mortgage Loan, is beingserviced and administered pursuant to the trust and servicing agreement for theMSSG Trust 2017-237P Transaction, which is incorporated by reference as Exhibit4.5 to this Annual Report on Form 10-K.

The Exhibit Index describesexhibits provided by certain parties (in their capacities indicated on theExhibit Index) with respect to the JW Marriott Chicago Mortgage Loan, whichconstituted approximately 1.3% of the asset pool of the issuing entity as ofits cut-off date.  The JW Marriott Chicago Mortgage Loan is an asset ofthe issuing entity and is part of a loan combination that includes the JWMarriott Chicago Mortgage Loan,  two other *pari passu* loans andthree subordinate companion loans, which are not assets of the issuing entity.A *pari passu* portion of the loan combination was securitized in theCSAIL 2017-CX9 Commercial Mortgage Trust transaction, Commission File Number333-207361-06 (the “CSAIL 2017-CX9 Transaction”). This loan combination,including the JW Marriott Chicago Mortgage Loan, is being serviced andadministered pursuant to the pooling and servicing agreement for the CSAIL2017-CX9 Transaction, which is incorporated by reference as Exhibit 4.6 to thisAnnual Report on Form 10-K.

The Exhibit Index describesexhibits provided by certain parties (in their capacities indicated on theExhibit Index) with respect to the 50 Varick Street Mortgage Loan, whichconstituted approximately 3.1% of the asset pool of the issuing entity as ofits cut-off date.  The 50 Varick Street Mortgage Loan is an asset of theissuing entity and is part of a loan combination that includes the 50 VarickStreet Mortgage Loan and two other *pari passu* loans, which are notassets of the issuing entity.  This loan combination, including the 50Varick Street Mortgage Loan, was serviced under the Pooling and ServicingAgreement for the issuing entity prior to the closing of the securitization ofa *pari passu* portion of the 50 Varick Street loan combination in the UBSCommercial Mortgage Trust 2017-C5 transaction, Commission File Number333-207340-05 (the “UBS 2017-C5 Transaction”).  After the closingof the UBS 2017-C5 Transaction on November 16, 2017, this loan combination,including the 50 Varick Street Mortgage Loan was, and will continue to be,serviced and administered pursuant to the pooling and servicing agreement withrespect to the UBS 2017-C5 Transaction, which is incorporated by reference asExhibit 4.7 to this Annual Report on Form 10-K.

The Exhibit Index describesexhibits provided by certain parties (in their capacities indicated on theExhibit Index) with respect to the Macedonia Commons Mortgage Loan, whichconstituted approximately 2.0% of the asset pool of the issuing entity as ofits cut-off date.  The Macedonia Commons Mortgage Loan is an asset of theissuing entity and is part of a loan combination that includes the MacedoniaCommons Mortgage Loan and one other *pari passu* loan, which is not anasset of the issuing entity.  This loan combination, including theMacedonia Commons Mortgage Loan, was serviced under the Pooling and ServicingAgreement for the issuing entity prior to the closing of the securitization ofthe other *pari passu* portion of the Macedonia Commons loan combinationin the Wells Fargo Commercial Mortgage Trust 2017-C41 transaction, CommissionFile Number 333-206677-20 (the “WFCM 2017-C41 Transaction”).  Afterthe closing of the WFCM 2017-C41 Transaction on November 30, 2017, this loancombination, including the Macedonia Commons Mortgage Loan was, and willcontinue to be, serviced and administered pursuant to the pooling and servicingagreement with respect to the WFCM 2017-C41 Transaction, which is incorporatedby reference as Exhibit 4.8 to this Annual Report on Form 10-K.

The master servicer of a poolingand servicing agreement or trust and servicing agreement also functions as theprimary servicer of the related mortgage loans serviced and administeredpursuant to such agreement unless a separate primary servicer is identifiedherein.  If this report does not identify a separate primary servicer, theservicer compliance statement provided by the master servicer under any suchagreement also encompasses its responsibilities as primary servicer of therelated mortgage loan or mortgage loans.

Wells Fargo Bank, NationalAssociation is the master servicer and certificate administrator of themortgage loans serviced under the Pooling and Servicing Agreement, the primaryservicer of the 245 Park Avenue Mortgage Loan and the Macedonia CommonsMortgage Loan and the primary servicer and special servicer of the 237 ParkAvenue Mortgage Loan. As a result, Wells Fargo Bank, National Association is a“servicer” as defined in Item 1108(a)(2)(iii) of Regulation AB, in thecapacities described above, because it is servicing mortgage loans thatconstituted 10% or more of the assets of the issuing entity as of its cut-offdate. The assessments of compliance with applicable servicing criteria,accountants’ attestation reports and servicer compliance statements deliveredby Wells Fargo Bank, National Association in the capacities described above arelisted in the Exhibit Index.

Wells Fargo Bank, National Association is the custodian ofthe mortgage loans serviced under the Pooling and Servicing Agreement, the 237Park Avenue Mortgage Loan, the Park West Village Mortgage Loan, the 245 ParkAvenue Mortgage Loan, the 50 Varick Street Mortgage Loan, the Macedonia CommonsMortgage Loan, the JW Marriott Chicago Mortgage Loan, the TZA MultifamilyPortfolio I Mortgage Loan and the Del Amo Fashion Center Mortgage Loan. As a result, Wells Fargo Bank, National Association is a servicing functionparticipant in the capacities described above, because it is servicing mortgageloans that constituted 5% or more of the assets of the issuing entity as of itscut-off date. The assessments of compliance with applicable servicing criteriaand accountants’ attestation reports delivered by Wells Fargo Bank, NationalAssociation in the capacities described above are listed in the Exhibit Index.

Rialto Capital Advisors, LLC isthe special servicer of the mortgage loans serviced under the Pooling andServicing Agreement and the JW Marriott Chicago Mortgage Loan. As a result,Rialto Capital Advisors, LLC is a “servicer” as defined in Item 1108(a)(2)(iii)of Regulation AB, in the capacities described above, because it is servicing mortgageloans that constituted 10% or more of the assets of the issuing entity as ofits cut-off date. The assessments of compliance with applicable servicingcriteria, accountants’ attestation reports and servicer compliance statementsdelivered by Rialto Capital Advisors, LLC in the capacities described above arelisted in the Exhibit Index.

AEGON USA Realty Advisors, LLC, is the special servicer ofthe Fairmount at Brewerytown Mortgage Loan and the 245 Park Avenue MortgageLoan, which constituted approximately 3.4% and 3.8%, respectively, of the assetpool of the issuing entity as of its cut-off date. In accordance with theCompliance and Disclosure Interpretations, Section 200.03 (Rules 13a-18 and15d-18, Servicer’s Assessment of Compliance), this percentage must be reduced *prorata*because it was only acting as special servicer of the Fairmount atBrewerytown Mortgage Loan from January 1, 2021 to January 20, 2021 and the 245Park Avenue Mortgage Loan from January 1, 2021 to April 12, 2021. As a result,it falls below the *de minimis*requirements in Item 1122 of Regulation ABand no such assessment or attestation is required. 

Situs Holdings, LLC, is the special servicer of the Fairmountat Brewerytown Mortgage Loan on and after January 21, 2021 and the 245 ParkAvenue Mortgage Loan and Situs Holdings, LLC, successor to Cohen Financial, aDivision of Truist Bank, successor by merger to SunTrust Bank is the specialservicer of the Del Amo Fashion Center Mortgage Loan.  These mortgageloans constitute more than 5%, but less than 10%, of the pool assets of theissuing entity.  Therefore, the Depositor included in this Annual Reporton Form 10-K an assessment of compliance with applicable servicing criteria forSitus Holdings, LLC and an accountants’ attestation report pursuant to Item1122 of Regulation AB because Situs Holdings, LLC is servicing more than 5% ofthe pool assets.  However, the Depositor is not required to include inthis Annual Report on Form 10-K a servicer compliance statement pursuant toItem 1123 of Regulation AB of Situs Holdings, LLC because Situs Holdings, LLCis an unaffiliated servicer servicing less than 10% of pool assets.

Pentalpha Surveillance LLC is the operating advisor of themortgage loans serviced under the Pooling and Servicing Agreement and the JWMarriott Chicago Mortgage Loan.  As a result, Pentalpha Surveillance LLCis a servicing function participant in the capacities described above, becauseit is servicing mortgage loans that constituted 5% or more of the assets of theissuing entity as of its cut-off date. The assessments of compliance withapplicable servicing criteria and accountants’ attestation reports delivered byPentalpha Surveillance LLC in the capacities described above are listed in theExhibit Index.

Trimont Real Estate Advisors, LLC is the operating advisor ofthe 245 Park Avenue Mortgage Loan and the Macedonia Commons MortgageLoan.  As a result, Trimont Real Estate Advisors, LLC is a servicingfunction participant in the capacities described above, because it is servicingmortgage loans that constituted 5% or more of the assets of the issuing entityas of its cut-off date. The assessments of compliance with applicable servicingcriteria and accountants’ attestation reports delivered by Trimont Real EstateAdvisors, LLC in the capacities described above are listed in the ExhibitIndex.

Park Bridge Lender Services LLC is the operating advisor ofthe 237 Park Avenue Mortgage Loan, the Park West Village Mortgage Loan, the 50Varick Street Mortgage Loan, the TZA Multifamily Portfolio I Mortgage Loan andthe Del Amo Fashion Center Mortgage Loan.  As a result, Park Bridge LenderServices LLC is a servicing function participant in the capacities describedabove, because it is servicing mortgage loans that constituted 5% or more ofthe assets of the issuing entity as of its cut-off date. The assessments ofcompliance with applicable servicing criteria and accountants’ attestationreports delivered by Park Bridge Lender Services LLC in the capacitiesdescribed above are listed in the Exhibit Index.

Midland Loan Services, a Divisionof PNC Bank, National Association is the primary servicer and special servicerof the TZA Multifamily Portfolio I Mortgage Loan, the Park West VillageMortgage Loan and the 50 Varick Street Mortgage Loan.  These mortgageloans constitute more than 5%, but less than 10%, of the pool assets of theissuing entity.  Therefore, the Depositor included in this Annual Reporton Form 10-K an assessment of compliance with applicable servicing criteria forMidland Loan Services, a Division of PNC Bank, National Association and anaccountants’ attestation report pursuant to Item 1122 of Regulation AB becauseMidland Loan Services, a Division of PNC Bank, National Association isservicing more than 5% of the pool assets.  However, the Depositor is notrequired to include in this Annual Report on Form 10-K a servicer compliancestatement pursuant to Item 1123 of Regulation AB of Midland Loan Services, aDivision of PNC Bank, National Association because Midland Loan Services, aDivision of PNC Bank, National Association is an unaffiliated servicerservicing less than 10% of pool assets. 

Wells Fargo Bank, NationalAssociation acts as trustee of the Park West Village Mortgage Loan, the TZAMultifamily Portfolio I Mortgage Loan, the JW Marriott Chicago Mortgage Loanand the 50 Varick Street Mortgage Loan.  Pursuant to the pooling andservicing agreement for the UBS 2017-C2 Transaction, the pooling and servicingagreement for the CSAIL 2017-CX9 Transaction and the pooling and servicingagreement for the UBS 2017-C5 Transaction, the trustee is required to providean assessment of compliance with applicable servicing criteria solely withrespect to Item 1122(d)(2)(iii) of Regulation AB (regarding advances of fundsor guarantees regarding collections, cash flows or distributions, and anyinterest or other fees charged for such advances, are made, reviewed andapproved as specified in the transaction agreements). However, during thereporting period, the trustee did not perform any servicing function withrespect to the servicing criteria specified in Item 1122(d)(2)(iii) ofRegulation AB.  The master servicer or the special servicer, to the extentrequired, performed the servicing function identified with respect to Item 1122(d)(2)(iii)of Regulation AB, and each such party included Item 1122(d)(2)(iii) ofRegulation AB in the assessment of compliance with applicable servicingcriteria and accountant’s attestation report for the subject transaction. As a result, this Annual Report on Form 10-K does not include an assessment ofcompliance with applicable servicing criteria of the trustee. One or more otherservicers of the Park West Village Mortgage Loan, the TZA Multifamily PortfolioI Mortgage Loan, the JW Marriott Chicago Mortgage Loan and the 50 Varick StreetMortgage Loan have delivered one or more assessments of compliance with respectto Item 1122(d)(2)(iii) of Regulation AB.

Wilmington Trust, NationalAssociation acts as trustee of  the mortgage loans serviced under the Poolingand Servicing Agreement, the 245 Park Avenue Mortgage Loan, the Del Amo FashionCenter Mortgage Loan, the 237 Park Avenue Mortgage Loan and the MacedoniaCommons Mortgage Loan.  Pursuant to the Pooling and Servicing Agreement,the trust and servicing agreement for the 245 Park Avenue Trust 2017-245PTransaction, the trust and servicing agreement for the DAFC 2017-AMOTransaction, the trust and servicing agreement for the MSSG Trust 2017-237PTransaction and the pooling and servicing agreement for the WFCM 2017-C41Transaction, the trustee is required to provide an assessment of compliancewith applicable servicing criteria solely with respect to Item 1122(d)(2)(iii)of Regulation AB (regarding advances of funds or guarantees regardingcollections, cash flows or distributions, and any interest or other feescharged for such advances, are made, reviewed and approved as specified in thetransaction agreements). However, during the reporting period, the trustee didnot perform any servicing function with respect to the servicing criteriaspecified in Item 1122(d)(2)(iii) of Regulation AB.  The master serviceror the special servicer, to the extent required, performed the servicingfunction identified with respect to Item 1122(d)(2)(iii) of Regulation AB, andeach such party included Item 1122(d)(2)(iii) of Regulation AB in theassessment of compliance with applicable servicing criteria and accountant’sattestation report for the subject transaction.  As a result, this AnnualReport on Form 10-K does not include an assessment of compliance withapplicable servicing criteria of the trustee. One or more other servicersof  the mortgage loans serviced under the Pooling and Servicing Agreement,the 245 Park Avenue Mortgage Loan, the Del Amo Fashion Center Mortgage Loan,the 237 Park Avenue Mortgage Loan and the Macedonia Commons Mortgage Loan havedelivered one or more assessments of compliance with respect to Item1122(d)(2)(iii) of Regulation AB.

This Annual Report on Form 10-Kincludes assessments of compliance with applicable servicing criteria andaccountants’ attestation reports from CoreLogic Solutions, LLC.  Thisentity was engaged by the master servicer under the Pooling and ServicingAgreement and the primary servicer of the 245 Park Avenue Mortgage Loan, the237 Park Avenue Mortgage Loan and the Macedonia Commons Mortgage Loan to remittax payments received from the escrow accounts of borrowers to local taxingauthorities, to report tax amounts due, to verify tax parcel information, andto verify non-escrow tax payments. These servicing functions are includedwithin the servicing criteria set forth in Items 1122(d)(4)(xi) and1122(d)(4)(xii) of Regulation AB.  Therefore, under the principles-baseddefinition of “servicer” set forth in Item 1101(j) of Regulation AB that looksto the functions that an entity performs, this vendor is a “servicer” for thepurposes of Item 1122 of Regulation AB.  *See* Compliance andDisclosure Interpretations, Section 301.01 (Item 1101(j)).

This Annual Report on Form 10-Kincludes an assessment of compliance with applicable servicing criteria,accountants’ attestation report and servicer compliance statement fromComputershare Trust Company, National Association (“CTCNA”).  CTCNAwas engaged by Wells Fargo Bank, National Association (“Wells Fargo”),in its capacity as certificate administrator and custodian, to perform certainspecified servicing functions identified in the assessment of compliance withapplicable servicing criteria and accountants’ attestation reports.  WellsFargo engaged CTCNA in connection with the sale of Wells Fargo’s corporatetrust services business to CTCNA and its affiliates.  Further, under theprinciples-based definition of “servicer” set forth in Item 1101(j) ofRegulation AB that looks to the functions that an entity performs, this partyis a “servicer” for the purposes of Item 1123 of Regulation AB.  SeeCompliance and Disclosure Interpretations, Section 301.01 (Item 1101(j)).

Theassessments of compliance with applicable servicing criteria, accountants’attestation reports and servicer compliance statements of the certificateadministrator of the 245 Park Avenue Mortgage Loan, the Del Amo Fashion CenterMortgage Loan, the Park West Village Mortgage Loan, the TZA MultifamilyPortfolio I Mortgage Loan, the 237 Park Avenue Mortgage Loan, the JW MarriottChicago Mortgage Loan, the 50 Varick Street Mortgage Loan and the MacedoniaCommons Mortgage Loan are omitted from this Annual Report on Form 10-K as thecertificate administrator pursuant to the related pooling and servicingagreement or trust and servicing agreement does not perform any activities thataddress servicing criteria with respect to the issuing entity and because theyare each not a “servicer” that meets the criteria in Item 1108(a)(2)(i) through(iii) of Regulation AB.

With respect to the *pari passu*loan combinations that include the Park West Village Mortgage Loan, theFairmount at Brewerytown Mortgage Loan, the 245 Park Avenue Mortgage Loan, the50 Varick Street Mortgage Loan, the Macedonia Commons Mortgage Loan, the JWMarriott Chicago Mortgage Loan, the TZA Multifamily Portfolio I Mortgage Loanand the Del Amo Fashion Center Mortgage Loan, (i) the reports on assessment ofcompliance with servicing criteria and attestation reports on assessment ofcompliance with servicing criteria of KeyBank National Association as primaryservicer of the Del Amo Fashion Center Mortgage Loan and the JW MarriottChicago Mortgage Loan and Argentic Services Company LP as special servicer ofthe Macedonia Commons Mortgage Loan, listed on the Exhibit Index are omittedfrom this Annual Report on Form 10-K as they are not required to be included onthis Annual Report on Form 10-K per Instruction 3 to Item 1122 of Regulation ABbecause they are parties performing activities that address servicing criteriarelating to 5% or less of the assets of the issuing entity, and the report onassessment of compliance with servicing criteria and attestation report onassessment of compliance with servicing criteria of AEGON USA Realty Advisors,LLC, as special servicer of the Fairmount at Brewerytown Mortgage Loan prior toJanuary 21, 2021 and the 245 Park Avenue Mortgage Loan prior to April 13, 2021listed on the Exhibit Index are omitted from this Annual Report on Form 10-Kfor the reasons set forth in the Explanatory Notes above; and (ii) the servicercompliance statements of AEGON USA Realty Advisors, LLC, as special servicer ofthe Fairmount at Brewerytown Mortgage Loan prior to January 21, 2021 and the245 Park Avenue Mortgage Loan prior to April 13, 2021, Situs Holdings, LLC asspecial servicer of the Fairmount at Brewerytown Mortgage Loan on and afterJanuary 21, 2021 and the 245 Park Avenue Mortgage Loan and Situs Holdings, LLC,successor to Cohen Financial, a Division of Truist Bank, successor by merger toSunTrust Bank as special servicer of the Del Amo Fashion Center Mortgage Loan,KeyBank National Association as primary servicer of the Del Amo Fashion CenterMortgage Loan and the JW Marriott Chicago Mortgage Loan, Midland Loan Services,a Division of PNC Bank, National Association as primary servicer and specialservicer of the Park West Village Mortgage Loan, the TZA Multifamily PortfolioI Mortgage Loan and the 50 Varick Street Mortgage Loan and Argentic ServicesCompany LP as special servicer of the Macedonia Commons Mortgage Loan, listedon the Exhibit Index are omitted from this Annual Report on Form 10-K as theyare not required by Item 1123 of Regulation AB to be included on this AnnualReport on Form 10-K because they are each an unaffiliated party that is not a“servicer” that meets the criteria in Item 1108(a)(2)(i) through (iii) ofRegulation AB.

**PART I**

**Item 1.  Business.**

Omitted.

**Item 1A.  Risk Factors.**

Omitted.

**Item 1B.  Unresolved Staff Comments.**

None.

**Item 2.  Properties.**

Omitted.

**Item 3.  Legal Proceedings.**

Omitted.

**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.

**Item 6.  Selected Financial Data.**

Omitted.

**Item 7.  Management’s Discussion and Analysis ofFinancial Condition and Results of Operations.**

Omitted.

**Item 7A.  Quantitative and Qualitative DisclosuresAbout Market Risk.**

Omitted.

**Item 8.  Financial Statements and Supplementary Data.**

Omitted.

**Item 9.  Changes in and Disagreements WithAccountants on Accounting and Financial Disclosure.**

Omitted.

**Item 9A.  Controls and Procedures.**

Omitted.

**Item 9B.  Other Information.**

None.

**PART III**

**Item 10.  Directors, Executive Officers and CorporateGovernance.**

Omitted.

**Item 11.  Executive Compensation.**

Omitted.

**Item 12.  Security Ownership of Certain BeneficialOwners and Management and Related Stockholder Matters.**

Omitted.

**Item 13.  Certain Relationships and RelatedTransactions, and Director Independence.**

Omitted.

**Item 14.  Principal Accounting Fees and Services.**

Omitted.

**ADDITIONAL DISCLOSURE ITEMS FOR REGULATION AB**

**Item 1112(b) of Regulation AB, Significant ObligorFinancial Information.**

No single obligor represents 10% or more of the pool assetsheld by the issuing entity. 

**Item 1114(b)(2) of Regulation AB, Significant EnhancementProvider Financial Information.**

No entity or group of affiliated entities provides any external creditenhancement or other support for the certificates within this transaction asdescribed under Item 1114(a) of Regulation AB.

**Item 1115(b) of Regulation AB, Certain DerivativesInstruments (Financial Information).**

No entity or group of affiliated entities provides anyderivative instruments or other support for the certificates within thistransaction as described under Item 1115 of Regulation AB.

**Item 1117 of Regulation AB, Legal Proceedings.**

The registrant knows of no material pending legal proceedinginvolving the trust or any party related to the trust, other than routinelitigation incidental to the duties of those respective parties, and thefollowing, with respect to Wells Fargo Bank, National Association, as trustee,as certificate administrator and as custodian.

 

In December 2014, Phoenix LightSF Limited and certain related entities and the National Credit UnionAdministration (NCUA) filed complaints in the United States District Court forthe Southern District of New York against Wells Fargo Bank, alleging claimsagainst Wells Fargo Bank in its capacity as trustee for a number of residentialmortgage-backed securities trusts. Complaints raising similar allegations havebeen filed by Commerzbank AG in the Southern District of New York and by IKBInternational and IKB Deutsche Industriebank in New York state court. In eachcase, the plaintiffs allege that Wells Fargo Bank, as trustee, caused losses toinvestors, and plaintiffs assert causes of action based upon, among otherthings, the trustee’s alleged failure to notify and enforce repurchaseobligations of mortgage loan sellers for purported breaches of representationsand warranties, notify investors of alleged events of default, and abide byappropriate standards of care following alleged events of default. Wells Fargo Bankpreviously settled two class action lawsuits with similar allegations that werefiled in November 2014 and December 2016 by institutional investors in theSouthern District of New York and New York state court, respectively. Inaddition, Park Royal I LLC and Park Royal II LLC have filed complaints in NewYork state court alleging Wells Fargo Bank, N.A., as trustee, failed to takeappropriate actions upon learning of defective mortgage loan documentation. InMarch 2021, the Company entered into an agreement to resolve the case filed bythe NCUA.

 

In addition to the foregoingcases, in August 2014 and August 2015 Nomura Credit & Capital Inc. (“Nomura”)and Natixis Real Estate Holdings, LLC (“Natixis”) filed a total of seventhird-party complaints against Wells Fargo Bank in New York state court. In theunderlying first-party actions, Nomura and Natixis have been sued for allegedbreaches of representations and warranties made in connection with residentialmortgage-backed securities sponsored by them. In the third-party actions,Nomura and Natixis allege that Wells Fargo Bank, as master servicer, primaryservicer or securities administrator, failed to notify Nomura and Natixis oftheir own breaches, failed to properly oversee the primary servicers, and failedto adhere to accepted servicing practices. Natixis additionally alleges thatWells Fargo Bank failed to perform default oversight duties. Wells Fargo Bankhas asserted counterclaims alleging that Nomura and Natixis failed to provideWells Fargo Bank notice of their representation and warranty breaches.

 

With respect to each of the foregoing litigations, WellsFargo Bank believes plaintiffs' claims are without merit and intends to contestthe claims vigorously, but there can be no assurances as to the outcome of thelitigations or the possible impact of the litigations on Wells Fargo Bank orthe related RMBS trusts.

**Item 1119 of Regulation AB, Affiliations and CertainRelationships and Related Transactions.**

The information regarding this Item has been previouslyprovided in the prospectus of the Registrant relating to the issuing entityfiled on October 18, 2017 pursuant to Rule 424(b)(2).

**Item 1122 of Regulation AB, Compliance with ApplicableServicing Criteria.**

The reports on assessments of compliance with the servicingcriteria for asset-backed securities and related attestation reports on suchassessments of compliance with respect to the mortgage loans are attachedhereto under Item 15 to this Annual Report on Form 10-K. Attached as Exhibit Zto the Pooling and Servicing Agreement incorporated by reference as Exhibit 4.1to this Annual Report on Form 10-K is a chart identifying the entitiesparticipating in a servicing function for the transaction responsible for eachapplicable servicing criteria set forth in Item 1122(d).

The reports on assessments of compliance with the servicingcriteria for asset-backed securities and related attestation reports on suchassessments of compliance with respect to the 245 Park Avenue Mortgage Loan,which is being serviced and administered pursuant to the trust and servicingagreement for the 245 Park Avenue Trust 2017-245P Transaction, are attachedhereto under Item 15 to this Annual Report on Form 10-K. Attached as Exhibit Lto the trust and servicing agreement for the 245 Park Avenue Trust 2017-245PTransaction incorporated by reference as Exhibit 4.2 to this Annual Report onForm 10-K is a chart identifying the entities participating in a servicingfunction for the 245 Park Avenue Trust 2017-245P Transaction responsible foreach applicable servicing criteria set forth in Item 1122(d).

The reports on assessments of compliance with the servicingcriteria for asset-backed securities and related attestation reports on suchassessments of compliance with respect to the Del Amo Fashion Center MortgageLoan, which is being serviced and administered pursuant to the trust andservicing agreement for the DAFC 2017-AMO Transaction, are attached heretounder Item 15 to this Annual Report on Form 10-K. Attached as Exhibit L to thetrust and servicing agreement for the DAFC 2017-AMO Transaction incorporated byreference as Exhibit 4.3 to this Annual Report on Form 10-K is a chartidentifying the entities participating in a servicing function for the DAFC2017-AMO Transaction responsible for each applicable servicing criteria setforth in Item 1122(d).

The reports on assessments of compliance with the servicingcriteria for asset-backed securities and related attestation reports on suchassessments of compliance with respect to the Park West Village Mortgage Loanand the TZA Multifamily Portfolio I Mortgage Loan, which are being serviced andadministered pursuant to the pooling and servicing agreement for the UBS2017-C2 Transaction, are attached hereto under Item 15 to this Annual Report onForm 10-K. Attached as Exhibit Z to the pooling and servicing agreement for theUBS 2017-C2 Transaction incorporated by reference as Exhibit 4.4 to this AnnualReport on Form 10-K is a chart identifying the entities participating in aservicing function for the UBS 2017-C2 Transaction responsible for eachapplicable servicing criteria set forth in Item 1122(d).

The reports on assessments of compliance with the servicingcriteria for asset-backed securities and related attestation reports on suchassessments of compliance with respect to the 237 Park Avenue Mortgage Loan,which is being serviced and administered pursuant to the trust and servicingagreement for the MSSG Trust 2017-237P Transaction, are attached hereto underItem 15 to this Annual Report on Form 10-K. Attached as Exhibit L to the trustand servicing agreement for the MSSG Trust 2017-237P Transaction incorporatedby reference as Exhibit 4.5 to this Annual Report on Form 10-K is a chartidentifying the entities participating in a servicing function for the MSSGTrust 2017-237P Transaction responsible for each applicable servicing criteriaset forth in Item 1122(d).

The reports on assessments of compliance with the servicingcriteria for asset-backed securities and related attestation reports on suchassessments of compliance with respect to the JW Marriott Chicago MortgageLoan, which is being serviced and administered pursuant to the pooling andservicing agreement for the CSAIL 2017-CX9 Transaction, are attached heretounder Item 15 to this Annual Report on Form 10-K. Attached as Exhibit AA to thepooling and servicing agreement for the CSAIL 2017-CX9 Transaction incorporatedby reference as Exhibit 4.6 to this Annual Report on Form 10-K is a chart identifyingthe entities participating in a servicing function for the CSAIL 2017-CX9Transaction responsible for each applicable servicing criteria set forth inItem 1122(d).

The reports on assessments of compliance with the servicingcriteria for asset-backed securities and related attestation reports on suchassessments of compliance with respect to the 50 Varick Street Mortgage Loan,which is being serviced and administered pursuant to the pooling and servicingagreement for the UBS 2017-C5 Transaction, are attached hereto under Item 15 tothis Annual Report on Form 10-K. Attached as Exhibit Z to the pooling andservicing agreement for the UBS 2017-C5 Transaction incorporated by referenceas Exhibit 4.7 to this Annual Report on Form 10-K is a chart identifying theentities participating in a servicing function for the UBS 2017-C5 Transactionresponsible for each applicable servicing criteria set forth in Item 1122(d).

The reports on assessments of compliance with the servicingcriteria for asset-backed securities and related attestation reports on suchassessments of compliance with respect to the Macedonia Commons Mortgage Loan,which is being serviced and administered pursuant to the pooling and servicingagreement for the WFCM 2017-C41 Transaction, are attached hereto under Item 15to this Annual Report on Form 10-K. Attached as Exhibit AA to the pooling andservicing agreement for the WFCM 2017-C41 Transaction incorporated by referenceas Exhibit 4.8 to this Annual Report on Form 10-K is a chart identifying theentities participating in a servicing function for the WFCM 2017-C41Transaction responsible for each applicable servicing criteria set forth inItem 1122(d).

The report on assessment of compliance for the twelve monthsended December 31, 2021, furnished pursuant to Item 1122 of Regulation AB byAegon USA Realty Advisors, LLC (“Aegon” or the “Company”), as special servicer,discloses that the following material instance of noncompliance occurred withrespect to its platform:

The examination performed by PWC identified an instance ofmaterial noncompliance with the servicing criteria set forth in Item1122(d)(3)(i)(A) of Regulation AB applicable to the Company during year endedDecember 31, 2021. More specifically, for the only active special serviced dealsubject to Item 1122(d)(3)(i)(A), the report to the investors was not preparedin accordance with the timeframes and other terms set forth in the transactionagreements for the period of January 1, 2021 to January 21, 2021. UBSCM 2017-C4is the specific deal related to the aforementioned finding. No other dealswithin Aegon’s CMBS special servicing portfolio were related to or impacted bythis instance of non-compliance.

Management acknowledges the timeframe for reporting for thisactive special serviced deal was missed by two days. Despite the timingdiscrepancy, there was no impact on any investor reporting, issuing, orservicing. No additional testing was available for this particular criteria dueto the downsizing of the CMBS portfolio given Aegon’s pending exit from thebusiness line.

**Item 1123 of Regulation AB, Servicer Compliance Statement.**

The servicer compliance statements are attached as Exhibitsto this Annual Report on Form 10-K.

The servicer compliance statement for the twelve months endedDecember 31, 2021, furnished pursuant to Item 1123 of Regulation AB by AegonUSA Realty Advisors, LLC (“Aegon” or the “Company”), as special servicer,discloses that the following material instance of noncompliance occurred withrespect to its platform:

The examination performed by PWC identified an instance ofmaterial noncompliance with the servicing criteria set forth in Item1122(d)(3)(i)(A) of Regulation AB applicable to the Company during year endedDecember 31, 2021. More specifically, for the only active special serviced dealsubject to Item 1122(d)(3)(i)(A), the report to the investors was not preparedin accordance with the timeframes and other terms set forth in the transactionagreements for the period of January 1, 2021 to January 21, 2021. UBSCM 2017-C4is the specific deal related to the aforementioned finding. No other dealswithin Aegon’s CMBS special servicing portfolio were related to or impacted bythis instance of non-compliance.

Management acknowledges the timeframe for reporting for thisactive special serviced deal was missed by two days. Despite the timingdiscrepancy, there was no impact on any investor reporting, issuing, orservicing. No additional testing was available for this particular criteria dueto the downsizing of the CMBS portfolio given Aegon’s pending exit from thebusiness line.

 

**PART IV**

**Item 15. Exhibits, Financial Statement Schedules**

(a) The following is a list of documents filed as part ofthis Annual Report on Form 10-K:

(1) Not applicable

(2) Not applicable

(3) See below

4.1          Pooling and Servicing Agreement, dated as of October 1,2017, by and among UBS Commercial Mortgage Securitization Corp., as Depositor,Wells Fargo Bank, National Association, as Master Servicer, Rialto CapitalAdvisors, LLC, as Special Servicer, AEGON USA Realty Advisors, LLC, asFairmount at Brewerytown Special Servicer, Wells Fargo Bank, NationalAssociation, as Certificate Administrator, Wilmington Trust, NationalAssociation, as Trustee, and Pentalpha Surveillance LLC, as Operating Advisorand as Asset Representations Reviewer (filed as Exhibit 4.1 to the registrant’sCurrent Report on Form 8-K/A filed on November 22, 2017 under Commission FileNo. 333-207340-04 and incorporated by reference herein).

4.2          Trust and Servicing Agreement, dated as of May 30, 2017, byand among J.P. Morgan Chase Commercial Mortgage Securities Corp., as Depositor,Wells Fargo Bank, National Association, as Servicer, AEGON USA Realty Advisors,LLC, as Special Servicer, Wells Fargo Bank, National Association, asCertificate Administrator, Wilmington Trust, National Association, as Trustee,and Trimont Real Estate Advisors, LLC, as Operating Advisor (filed as Exhibit4.4 to the registrant’s Current Report on Form 8-K filed on October 18, 2017under Commission File No. 333-207340-04 and incorporated by reference herein).

4.3          Trust and Servicing Agreement, dated as of June 20, 2017,by and among Banc of America Merrill Lynch Large Loan, Inc., as Depositor,KeyBank National Association, as Servicer, Cohen Financial, a Division ofTruist Bank (f/k/a Cohen Financial, a Division of SunTrust Bank), as SpecialServicer, Wells Fargo Bank, National Association, as Certificate Administrator,Wilmington Trust, National Association, as Trustee, and Park Bridge LenderServices LLC, as Operating Advisor (filed as Exhibit 4.6 to the registrant’sCurrent Report on Form 8-K filed on October 18, 2017 under Commission File No.333-207340-04 and incorporated by reference herein).

4.4          Pooling and Servicing Agreement, dated as of August 1, 2017,by and among UBS Commercial Mortgage Securitization Corp., as Depositor,Midland Loan Services, a Division of PNC Bank, National Association, as MasterServicer and as Special Servicer, Wells Fargo Bank, National Association, asCertificate Administrator and as Trustee, and Park Bridge Lender Services LLC,as Operating Advisor and as Asset Representations Reviewer (filed as Exhibit4.3 to the registrant’s Current Report on Form 8-K filed on October 18, 2017under Commission File No. 333-207340-04 and incorporated by reference herein).

4.5          Trust and Servicing Agreement, dated as of August 9,2017, by and among Morgan Stanley Capital I Inc., as Depositor, Wells FargoBank, National Association, as Servicer, Wells Fargo Bank, NationalAssociation, as Special Servicer, Wilmington Trust, National Association, asTrustee, Wells Fargo Bank, National Association, as Certificate Administratorand Custodian, and Park Bridge Lender Services LLC, as Operating Advisor (filedas Exhibit 4.2 to the registrant’s Current Report on Form 8-K filed on October18, 2017 under Commission File No. 333-207340-04 and incorporated by referenceherein).

4.6          Pooling and Servicing Agreement, dated as of September 1,2017, by and among Credit Suisse Commercial Mortgage Securities Corp., asDepositor, KeyBank National Association, as Master Servicer, Rialto CapitalAdvisors, LLC, as Special Servicer, Wells Fargo Bank, National Association, asCertificate Administrator and as Trustee, and Pentalpha Surveillance LLC, asOperating Advisor and as Asset Representations Reviewer (filed as Exhibit 4.5to the registrant’s Current Report on Form 8-K filed on October 18, 2017 underCommission File No. 333-207340-04 and incorporated by reference herein).

4.7          Pooling and Servicing Agreement, dated as of November 1,2017, by and among UBS Commercial Mortgage Securitization Corp., as Depositor,Midland Loan Services, a Division of PNC Bank, National Association, as MasterServicer and as Special Servicer, Wells Fargo Bank, National Association, asCertificate Administrator, as Cayman Agent and as Trustee, and Park BridgeLender Services LLC, as Operating Advisor and as Asset Representations Reviewer(filed as Exhibit 4.1 to the registrant’s Current Report on Form 8-K/A filed onDecember 5, 2017 under Commission File No. 333-207340-04 and incorporated byreference herein).

4.8          Pooling and Servicing Agreement, dated as of November 1,2017, by and among Wells Fargo Commercial Mortgage Securities, Inc., asDepositor, Wells Fargo Bank, National Association, as Master Servicer, LNRPartners, LLC, as Special Servicer, Wells Fargo Bank, National Association, asCertificate Administrator, Wilmington Trust, National Association, as Trustee,and Trimont Real Estate Advisors, LLC, as Operating Advisor and as AssetRepresentations Reviewer (filed as Exhibit 4.1 to the registrant’s CurrentReport on Form 8-K filed on December 5, 2017 under Commission File No.333-207340-04 and incorporated by reference herein).

4.9          Agreement Between Note Holders, dated as of August 23,2017, by and between Morgan Stanley Bank, N.A., as Initial Note A-1 Holder andInitial Note B-1 Holder, and Société Générale, as Initial Note A-2 Holder andInitial Note B-2 Holder (filed as Exhibit 4.7 to the registrant’s CurrentReport on Form 8-K filed on October 18, 2017 under Commission File No.333-207340-04 and incorporated by reference herein).

4.10         Agreement Among Noteholders, dated as of July 19, 2017,by and among UBS AG, by and through its branch office at 1285 Avenue of theAmericas, New York, New York, as Initial Note A-1 Holder, Initial Note A-2Holder, Initial Note A-3 Holder, Initial Note A-4 Holder, Initial Note A-5Holder, and Initial Note A-6 Holder, and Athene Annuity and Life Company, anIowa company doing business in New York under fictitious name MLS, Athene Iowa,as Initial Note B-1 Holder and Initial Note B-2 Holder, and Athene Annuity& Life Assurance Company, a Delaware company doing business in New Yorkunder fictitious name MLS, Athene Delaware, as Initial Note B-3 Holder (filedas Exhibit 4.8 to the registrant’s Current Report on Form 8-K filed on October18, 2017 under Commission File No. 333-207340-04 and incorporated by referenceherein).

4.11         Agreement Between Note Holders, dated as of August 31, 2017,by and between UBS AG, by and through its branch office at 1285 Avenue of theAmericas, New York, New York, as Initial Note A-1 Holder, UBS AG, by andthrough its branch office at 1285 Avenue of the Americas, New York, New York,as Initial Note A-2 Holder, UBS AG, by and through its branch office at 1285Avenue of the Americas, New York, New York, as Initial Note A-3 Holder, UBS AG,by and through its branch office at 1285 Avenue of the Americas, New York, NewYork, as Initial Note A-4 Holder, and UBS AG, by and through its branch officeat 1285 Avenue of the Americas, New York, New York, as Initial Note A-5 Holder(filed as Exhibit 4.9 to the registrant’s Current Report on Form 8-K filed onOctober 18, 2017 under Commission File No. 333-207340-04 and incorporated byreference herein).

4.12         Co-Lender Agreement, dated as of May 30, 2017, by andamong JPMorgan Chase Bank, National Association, Natixis Real Estate CapitalLLC, Société Générale, Deutsche Bank, AG, New York Branch, and Barclays BankPLC (filed as Exhibit 4.10 to the registrant’s Current Report on Form 8-K filedon October 18, 2017 under Commission File No. 333-207340-04 and incorporated byreference herein).

4.13         Amended and Restated Agreement Among Noteholders, datedas of August 17, 2017, by and among UBS AG, by and through its branch office at1285 Avenue of the Americas, New York, New York, as Initial Note A-1 Holder andInitial Note A-2 Holder, and Townsend Real Estate Fund, L.P., as JuniorNoteholder (filed as Exhibit 4.11 to the registrant’s Current Report on Form8-K filed on October 18, 2017 under Commission File No. 333-207340-04 andincorporated by reference herein).

4.14         Co-Lender Agreement, dated as of October 18, 2017,between Ladder Capital Finance LLC, as Note A-1 Holder, and Ladder CapitalFinance LLC, as Note A-2 Holder, and Ladder Capital Finance LLC, as Note A-3Holder (filed as Exhibit 4.12 to the registrant’s Current Report on Form 8-K filedon October 18, 2017 under Commission File No. 333-207340-04 and incorporated byreference herein).

4.15         Agreement Between Note Holders, dated as of October 18,2017, by and between UBS AG, by and through its branch office at 1285 Avenue ofthe Americas, New York, New York, as Initial Note A-1 Holder, UBS AG, by andthrough its branch office at 1285 Avenue of the Americas, New York, New York,as Initial Note A-2 Holder, and UBS AG, by and through its branch office at1285 Avenue of the Americas, New York, New York, as Initial Note A-3 Holder(filed as Exhibit 4.13 to the registrant’s Current Report on Form 8-K filed onOctober 18, 2017 under Commission File No. 333-207340-04 and incorporated byreference herein).

4.16         Co-Lender Agreement, dated as of October 18, 2017, betweenLadder Capital Finance LLC, as Note A-1 Holder, and Ladder Capital Finance LLC,as Note A-2 Holder (filed as Exhibit 4.14 to the registrant’s Current Report onForm 8-K filed on October 18, 2017 under Commission File No. 333-207340-04 andincorporated by reference herein).

4.17         Co-Lender Agreement, dated as of October 18, 2017,between Ladder Capital Finance LLC, as Note A-1 Holder, and Ladder CapitalFinance LLC, as Note A-2 Holder (filed as Exhibit 4.15 to the registrant’sCurrent Report on Form 8-K filed on October 18, 2017 under Commission File No.333-207340-04 and incorporated by reference herein).

4.18         Agreement Between Note Holders, dated as of October 18,2017, by and between UBS AG, by and through its branch office at 1285 Avenue ofthe Americas, New York, New York, as Initial Note A-1-1 Holder, Initial NoteA-1-2 Holder and Initial Note A-1-3 Holder, and Argentic Real Estate FinanceLLC, as Initial Note A-2 Holder (filed as Exhibit 4.16 to the registrant’sCurrent Report on Form 8-K filed on October 18, 2017 under Commission File No.333-207340-04 and incorporated by reference herein).

4.19         Co-Lender Agreement, dated as of July 28, 2017, by andbetween Natixis Real Estate Capital LLC, as Initial Note A-1 Holder, NatixisReal Estate Capital LLC, as Initial Note A-2 Holder, Natixis Real EstateCapital LLC, as Initial Note A-3 Holder, Natixis Real Estate Capital LLC, asInitial Note B-1-A Holder, Natixis Real Estate Capital LLC, as Initial NoteB-1-B Holder, and Natixis Real Estate Capital LLC, as Initial Note B-2 Holder(filed as Exhibit 4.17 to the registrant’s Current Report on Form 8-K filed onOctober 18, 2017 under Commission File No. 333-207340-04 and incorporated byreference herein).

4.20         Agreement Between Note Holders, dated as of August 17,2017, by and between Société Générale, as Initial Note A-1 Holder, and SociétéGénérale, as Initial Note A-2 Holder, and Société Générale, as Initial Note A-3Holder, and Société Générale, as Initial Note A-4 Holder (filed as Exhibit 4.18to the registrant’s Current Report on Form 8-K filed on October 18, 2017 underCommission File No. 333-207340-04 and incorporated by reference herein).

4.21         Co-Lender Agreement, dated as of May 12, 2017, by and amongBank of America, N.A., as Initial Note 1 Holder, and Barclays Bank PLC, asInitial Note 2 Holder, and Société Générale, as Initial Note 3 Holder, andWells Fargo Bank, National Association, as Initial Note 4 Holder (filed asExhibit 4.19 to the registrant’s Current Report on Form 8-K filed on October18, 2017 under Commission File No. 333-207340-04 and incorporated by referenceherein).

31           Rule 13a-14(d)/15d-14(d) Certifications.

33           Reports on assessment of compliance with servicing criteria for asset-backedsecurities.

33.1        Wells Fargo Bank, National Association, as MasterServicer

33.2        Rialto Capital Advisors, LLC, as Special Servicer

33.3        AEGON USA Realty Advisors, LLC, as Special Servicer of the Fairmount atBrewerytown Mortgage Loan prior to January 21, 2021 (Omitted. See ExplanatoryNotes.)

33.4        Situs Holdings, LLC, as Special Servicer of theFairmount at Brewerytown Mortgage Loan on and after January 21, 2021

33.5        Wilmington Trust, National Association, as Trustee (Omitted. See ExplanatoryNotes.)

33.6        Wells Fargo Bank, National Association, asCertificate Administrator

33.7        Wells Fargo Bank, National Association, asCustodian

33.8        Pentalpha Surveillance LLC, as Operating Advisor

33.9        CoreLogic Solutions, LLC, as Servicing FunctionParticipant

33.10      Computershare Trust Company, National Association,as Servicing Function Participant for the Certificate Administrator on andafter November 1, 2021

33.11      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021

33.12      Wells Fargo Bank, National Association, as PrimaryServicer of The District Mortgage Loan (see Exhibit 33.1)

33.13      Rialto Capital Advisors, LLC, as Special Servicerof The District Mortgage Loan (see Exhibit 33.2)

33.14      Wilmington Trust, National Association, as Trustee of The District MortgageLoan (Omitted. See Explanatory Notes.)

33.15      Wells Fargo Bank, National Association, asCustodian of The District Mortgage Loan (see Exhibit 33.7)

33.16      Pentalpha Surveillance LLC, as Operating Advisor ofThe District Mortgage Loan (see Exhibit 33.8)

33.17      CoreLogic Solutions, LLC, as Servicing FunctionParticipant of The District Mortgage Loan (see Exhibit 33.9)

33.18      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.11)

33.19      Wells Fargo Bank, National Association, as PrimaryServicer of the Meridian Sunrise Village Mortgage Loan (see Exhibit 33.1)

33.20      Rialto Capital Advisors, LLC, as Special Servicerof the Meridian Sunrise Village Mortgage Loan (see Exhibit 33.2)

33.21      Wilmington Trust, National Association, as Trustee of the Meridian SunriseVillage Mortgage Loan (Omitted. See Explanatory Notes.)

33.22      Wells Fargo Bank, National Association, asCustodian of the Meridian Sunrise Village Mortgage Loan (see Exhibit 33.7)

33.23      Pentalpha Surveillance LLC, as Operating Advisor ofthe Meridian Sunrise Village Mortgage Loan (see Exhibit 33.8)

33.24      CoreLogic Solutions, LLC, as Servicing FunctionParticipant of the Meridian Sunrise Village Mortgage Loan (see Exhibit 33.9)

33.25      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.11)

33.26      Wells Fargo Bank, National Association, as PrimaryServicer of the Bank of America Office Campus Building 600 Mortgage Loan (seeExhibit 33.1)

33.27      Rialto Capital Advisors, LLC, as Special Servicerof the Bank of America Office Campus Building 600 Mortgage Loan (see Exhibit33.2)

33.28      Wilmington Trust, National Association, as Trustee of the Bank of AmericaOffice Campus Building 600 Mortgage Loan (Omitted. See Explanatory Notes.)

33.29      Wells Fargo Bank, National Association, asCustodian of the Bank of America Office Campus Building 600 Mortgage Loan (seeExhibit 33.7)

33.30      Pentalpha Surveillance LLC, as Operating Advisor ofthe Bank of America Office Campus Building 600 Mortgage Loan (see Exhibit 33.8)

33.31      CoreLogic Solutions, LLC, as Servicing FunctionParticipant of the Bank of America Office Campus Building 600 Mortgage Loan(see Exhibit 33.9)

33.32      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.11)

33.33      Wells Fargo Bank, National Association, as PrimaryServicer of the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 33.1)

33.34      Rialto Capital Advisors, LLC, as Special Servicerof the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 33.2)

33.35      Wilmington Trust, National Association, as Trustee of the DoubleTree BerkeleyMarina Mortgage Loan (Omitted. See Explanatory Notes.)

33.36      Wells Fargo Bank, National Association, as Custodianof the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 33.7)

33.37      Pentalpha Surveillance LLC, as Operating Advisor ofthe DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 33.8)

33.38      CoreLogic Solutions, LLC, as Servicing FunctionParticipant of the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 33.9)

33.39      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.11)

33.40      Wells Fargo Bank, National Association, as PrimaryServicer of the 245 Park Avenue Mortgage Loan (see Exhibit 33.1)

33.41      AEGON USA Realty Advisors, LLC, as Special Servicer of the 245 Park AvenueMortgage Loan prior to April 13, 2021 (Omitted. See Explanatory Notes.)

33.42      Situs Holdings, LLC, as Special Servicer of the 245Park Avenue Mortgage Loan on and after April 13, 2021 (see Exhibit 33.4)

33.43      Wilmington Trust, National Association, as Trustee of the 245 Park AvenueMortgage Loan (Omitted. See Explanatory Notes.)

33.44      Wells Fargo Bank, National Association, asCustodian of the 245 Park Avenue Mortgage Loan (see Exhibit 33.7)

33.45      Trimont Real Estate Advisors, LLC, as OperatingAdvisor of the 245 Park Avenue Mortgage Loan

33.46      CoreLogic Solutions, LLC, as Servicing FunctionParticipant of the 245 Park Avenue Mortgage Loan (see Exhibit 33.9)

33.47      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.11)

33.48      KeyBank National Association, as Primary Servicer of the Del Amo Fashion CenterMortgage Loan (Omitted. See Explanatory Notes.)

33.49      Situs Holdings, LLC, successor to Cohen Financial,a Division of Truist Bank, successor by merger to SunTrust Bank, as SpecialServicer of the Del Amo Fashion Center Mortgage Loan (see Exhibit 33.4)

33.50      Wilmington Trust, National Association, as Trustee of the Del Amo FashionCenter Mortgage Loan (Omitted. See Explanatory Notes.)

33.51      Wells Fargo Bank, National Association, asCustodian of the Del Amo Fashion Center Mortgage Loan (see Exhibit 33.7)

33.52      Park Bridge Lender Services LLC, as OperatingAdvisor of the Del Amo Fashion Center Mortgage Loan

33.53      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.11)

33.54      Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of the Park West Village MortgageLoan

33.55      Midland Loan Services, a Division of PNC Bank,National Association, as Special Servicer of the Park West Village MortgageLoan (see Exhibit 33.54)

33.56      Wells Fargo Bank, National Association, as Trustee of the Park West VillageMortgage Loan (Omitted. See Explanatory Notes.)

33.57      Wells Fargo Bank, National Association, asCustodian of the Park West Village Mortgage Loan (see Exhibit 33.7)

33.58      Park Bridge Lender Services LLC, as OperatingAdvisor of the Park West Village Mortgage Loan (see Exhibit 33.52)

33.59      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.11)

33.60      Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of the TZA Multifamily Portfolio IMortgage Loan (see Exhibit 33.54)

33.61      Midland Loan Services, a Division of PNC Bank,National Association, as Special Servicer of the TZA Multifamily Portfolio IMortgage Loan (see Exhibit 33.54)

33.62      Wells Fargo Bank, National Association, as Trustee of the TZA MultifamilyPortfolio I Mortgage Loan (Omitted. See Explanatory Notes.)

33.63      Wells Fargo Bank, National Association, asCustodian of the TZA Multifamily Portfolio I Mortgage Loan (see Exhibit 33.7)

33.64      Park Bridge Lender Services LLC, as OperatingAdvisor of the TZA Multifamily Portfolio I Mortgage Loan (see Exhibit 33.52)

33.65      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.11)

33.66      Wells Fargo Bank, National Association, as PrimaryServicer of the 237 Park Avenue Mortgage Loan (see Exhibit 33.1)

33.67      Wells Fargo Bank, National Association, as SpecialServicer of the 237 Park Avenue Mortgage Loan (see Exhibit 33.1)

33.68      Wilmington Trust, National Association, as Trustee of the 237 Park AvenueMortgage Loan (Omitted. See Explanatory Notes.)

33.69      Wells Fargo Bank, National Association, asCustodian of the 237 Park Avenue Mortgage Loan (see Exhibit 33.7)

33.70      Park Bridge Lender Services LLC, as OperatingAdvisor of the 237 Park Avenue Mortgage Loan (see Exhibit 33.52)

33.71      CoreLogic Solutions, LLC, as Servicing FunctionParticipant of the 237 Park Avenue Mortgage Loan (see Exhibit 33.9)

33.72      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.11)

33.73      KeyBank National Association, as Primary Servicer of the JW Marriott ChicagoMortgage Loan (Omitted. See Explanatory Notes.)

33.74      Rialto Capital Advisors, LLC, as Special Servicerof the JW Marriott Chicago Mortgage Loan (see Exhibit 33.2)

33.75      Wells Fargo Bank, National Association, as Trustee of the JW Marriott ChicagoMortgage Loan (Omitted. See Explanatory Notes.)

33.76      Wells Fargo Bank, National Association, asCustodian of the JW Marriott Chicago Mortgage Loan (see Exhibit 33.7)

33.77      Pentalpha Surveillance LLC, as Operating Advisor ofthe JW Marriott Chicago Mortgage Loan (see Exhibit 33.8)

33.78      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.11)

33.79      Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of the 50 Varick Street Mortgage Loan(see Exhibit 33.54)

33.80      Midland Loan Services, a Division of PNC Bank,National Association, as Special Servicer of the 50 Varick Street Mortgage Loan(see Exhibit 33.54)

33.81      Wells Fargo Bank, National Association, as Trustee of the 50 Varick StreetMortgage Loan (Omitted. See Explanatory Notes.)

33.82      Wells Fargo Bank, National Association, asCustodian of the 50 Varick Street Mortgage Loan (see Exhibit 33.7)

33.83      Park Bridge Lender Services LLC, as OperatingAdvisor of the 50 Varick Street Mortgage Loan (see Exhibit 33.52)

33.84      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1, 2021(see Exhibit 33.11)

33.85      Wells Fargo Bank, National Association, as PrimaryServicer of the Macedonia Commons Mortgage Loan (see Exhibit 33.1)

33.86      Argentic Services Company LP, as Special Servicer of the Macedonia CommonsMortgage Loan (Omitted. See Explanatory Notes.)

33.87      Wilmington Trust, National Association, as Trustee of the Macedonia CommonsMortgage Loan (Omitted. See Explanatory Notes.)

33.88      Wells Fargo Bank, National Association, asCustodian of the Macedonia Commons Mortgage Loan (see Exhibit 33.7)

33.89      Trimont Real Estate Advisors, LLC, as OperatingAdvisor of the Macedonia Commons Mortgage Loan (see Exhibit 33.45)

33.90      CoreLogic Solutions, LLC, as Servicing FunctionParticipant of the Macedonia Commons Mortgage Loan (see Exhibit 33.9)

33.91      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.11)

34           Attestationreports on assessment of compliance with servicing criteria for asset-backedsecurities.

34.1        Wells Fargo Bank, National Association, as MasterServicer

34.2        Rialto Capital Advisors, LLC, as Special Servicer

34.3        AEGON USA Realty Advisors, LLC, as Special Servicer of the Fairmount atBrewerytown Mortgage Loan prior to January 21, 2021 (Omitted. See ExplanatoryNotes.)

34.4        Situs Holdings, LLC, as Special Servicer of theFairmount at Brewerytown Mortgage Loan on and after January 21, 2021

34.5        Wilmington Trust, National Association, as Trustee (Omitted. See ExplanatoryNotes.)

34.6        Wells Fargo Bank, National Association, asCertificate Administrator

34.7        Wells Fargo Bank, National Association, asCustodian

34.8        Pentalpha Surveillance LLC, as Operating Advisor

34.9        CoreLogic Solutions, LLC, as Servicing FunctionParticipant

34.10      Computershare Trust Company, National Association,as Servicing Function Participant for the Certificate Administrator on andafter November 1, 2021

34.11      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021

34.12      Wells Fargo Bank, National Association, as PrimaryServicer of The District Mortgage Loan (see Exhibit 34.1)

34.13      Rialto Capital Advisors, LLC, as Special Servicerof The District Mortgage Loan (see Exhibit 34.2)

34.14      Wilmington Trust, National Association, as Trustee of The District MortgageLoan (Omitted. See Explanatory Notes.)

34.15      Wells Fargo Bank, National Association, asCustodian of The District Mortgage Loan (see Exhibit 34.7)

34.16      Pentalpha Surveillance LLC, as Operating Advisor ofThe District Mortgage Loan (see Exhibit 34.8)

34.17      CoreLogic Solutions, LLC, as Servicing FunctionParticipant of The District Mortgage Loan (see Exhibit 34.9)

34.18      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.11)

34.19      Wells Fargo Bank, National Association, as PrimaryServicer of the Meridian Sunrise Village Mortgage Loan (see Exhibit 34.1)

34.20      Rialto Capital Advisors, LLC, as Special Servicerof the Meridian Sunrise Village Mortgage Loan (see Exhibit 34.2)

34.21      Wilmington Trust, National Association, as Trustee of the Meridian SunriseVillage Mortgage Loan (Omitted. See Explanatory Notes.)

34.22      Wells Fargo Bank, National Association, asCustodian of the Meridian Sunrise Village Mortgage Loan (see Exhibit 34.7)

34.23      Pentalpha Surveillance LLC, as Operating Advisor ofthe Meridian Sunrise Village Mortgage Loan (see Exhibit 34.8)

34.24      CoreLogic Solutions, LLC, as Servicing Function Participantof the Meridian Sunrise Village Mortgage Loan (see Exhibit 34.9)

34.25      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.11)

34.26      Wells Fargo Bank, National Association, as PrimaryServicer of the Bank of America Office Campus Building 600 Mortgage Loan (seeExhibit 34.1)

34.27      Rialto Capital Advisors, LLC, as Special Servicerof the Bank of America Office Campus Building 600 Mortgage Loan (see Exhibit34.2)

34.28      Wilmington Trust, National Association, as Trustee of the Bank of AmericaOffice Campus Building 600 Mortgage Loan (Omitted. See Explanatory Notes.)

34.29      Wells Fargo Bank, National Association, asCustodian of the Bank of America Office Campus Building 600 Mortgage Loan (seeExhibit 34.7)

34.30      Pentalpha Surveillance LLC, as Operating Advisor ofthe Bank of America Office Campus Building 600 Mortgage Loan (see Exhibit 34.8)

34.31      CoreLogic Solutions, LLC, as Servicing FunctionParticipant of the Bank of America Office Campus Building 600 Mortgage Loan(see Exhibit 34.9)

34.32      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.11)

34.33      Wells Fargo Bank, National Association, as PrimaryServicer of the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 34.1)

34.34      Rialto Capital Advisors, LLC, as Special Servicerof the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 34.2)

34.35      Wilmington Trust, National Association, as Trustee of the DoubleTree BerkeleyMarina Mortgage Loan (Omitted. See Explanatory Notes.)

34.36      Wells Fargo Bank, National Association, asCustodian of the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 34.7)

34.37      Pentalpha Surveillance LLC, as Operating Advisor ofthe DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 34.8)

34.38      CoreLogic Solutions, LLC, as Servicing FunctionParticipant of the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 34.9)

34.39      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.11)

34.40      Wells Fargo Bank, National Association, as PrimaryServicer of the 245 Park Avenue Mortgage Loan (see Exhibit 34.1)

34.41      AEGON USA Realty Advisors, LLC, as Special Servicer of the 245 Park AvenueMortgage Loan prior to April 13, 2021 (Omitted. See Explanatory Notes.)

34.42      Situs Holdings, LLC, as Special Servicer of the 245Park Avenue Mortgage Loan on and after April 13, 2021 (see Exhibit 34.4)

34.43      Wilmington Trust, National Association, as Trustee of the 245 Park Avenue MortgageLoan (Omitted. See Explanatory Notes.)

34.44      Wells Fargo Bank, National Association, asCustodian of the 245 Park Avenue Mortgage Loan (see Exhibit 34.7)

34.45      Trimont Real Estate Advisors, LLC, as OperatingAdvisor of the 245 Park Avenue Mortgage Loan

34.46      CoreLogic Solutions, LLC, as Servicing FunctionParticipant of the 245 Park Avenue Mortgage Loan (see Exhibit 34.9)

34.47      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.11)

34.48      KeyBank National Association, as Primary Servicer of the Del Amo Fashion CenterMortgage Loan (Omitted. See Explanatory Notes.)

34.49      Situs Holdings, LLC, successor to Cohen Financial,a Division of Truist Bank, successor by merger to SunTrust Bank, as SpecialServicer of the Del Amo Fashion Center Mortgage Loan (see Exhibit 34.4)

34.50      Wilmington Trust, National Association, as Trustee of the Del Amo FashionCenter Mortgage Loan (Omitted. See Explanatory Notes.)

34.51      Wells Fargo Bank, National Association, asCustodian of the Del Amo Fashion Center Mortgage Loan (see Exhibit 34.7)

34.52      Park Bridge Lender Services LLC, as OperatingAdvisor of the Del Amo Fashion Center Mortgage Loan

34.53      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.11)

34.54      Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of the Park West Village MortgageLoan

34.55      Midland Loan Services, a Division of PNC Bank,National Association, as Special Servicer of the Park West Village MortgageLoan (see Exhibit 34.54)

34.56      Wells Fargo Bank, National Association, as Trustee of the Park West VillageMortgage Loan (Omitted. See Explanatory Notes.)

34.57      Wells Fargo Bank, National Association, asCustodian of the Park West Village Mortgage Loan (see Exhibit 34.7)

34.58      Park Bridge Lender Services LLC, as OperatingAdvisor of the Park West Village Mortgage Loan (see Exhibit 34.52)

34.59      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.11)

34.60      Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of the TZA Multifamily Portfolio IMortgage Loan (see Exhibit 34.54)

34.61      Midland Loan Services, a Division of PNC Bank,National Association, as Special Servicer of the TZA Multifamily Portfolio IMortgage Loan (see Exhibit 34.54)

34.62      Wells Fargo Bank, National Association, as Trustee of the TZA MultifamilyPortfolio I Mortgage Loan (Omitted. See Explanatory Notes.)

34.63      Wells Fargo Bank, National Association, asCustodian of the TZA Multifamily Portfolio I Mortgage Loan (see Exhibit 34.7)

34.64      Park Bridge Lender Services LLC, as Operating Advisorof the TZA Multifamily Portfolio I Mortgage Loan (see Exhibit 34.52)

34.65      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.11)

34.66      Wells Fargo Bank, National Association, as PrimaryServicer of the 237 Park Avenue Mortgage Loan (see Exhibit 34.1)

34.67      Wells Fargo Bank, National Association, as SpecialServicer of the 237 Park Avenue Mortgage Loan (see Exhibit 34.1)

34.68      Wilmington Trust, National Association, as Trustee of the 237 Park AvenueMortgage Loan (Omitted. See Explanatory Notes.)

34.69      Wells Fargo Bank, National Association, asCustodian of the 237 Park Avenue Mortgage Loan (see Exhibit 34.7)

34.70      Park Bridge Lender Services LLC, as OperatingAdvisor of the 237 Park Avenue Mortgage Loan (see Exhibit 34.52)

34.71      CoreLogic Solutions, LLC, as Servicing FunctionParticipant of the 237 Park Avenue Mortgage Loan (see Exhibit 34.9)

34.72      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.11)

34.73      KeyBank National Association, as Primary Servicer of the JW Marriott ChicagoMortgage Loan (Omitted. See Explanatory Notes.)

34.74      Rialto Capital Advisors, LLC, as Special Servicerof the JW Marriott Chicago Mortgage Loan (see Exhibit 34.2)

34.75      Wells Fargo Bank, National Association, as Trustee of the JW Marriott ChicagoMortgage Loan (Omitted. See Explanatory Notes.)

34.76      Wells Fargo Bank, National Association, asCustodian of the JW Marriott Chicago Mortgage Loan (see Exhibit 34.7)

34.77      Pentalpha Surveillance LLC, as Operating Advisor ofthe JW Marriott Chicago Mortgage Loan (see Exhibit 34.8)

34.78      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.11)

34.79      Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of the 50 Varick Street Mortgage Loan(see Exhibit 34.54)

34.80      Midland Loan Services, a Division of PNC Bank,National Association, as Special Servicer of the 50 Varick Street Mortgage Loan(see Exhibit 34.54)

34.81      Wells Fargo Bank, National Association, as Trustee of the 50 Varick StreetMortgage Loan (Omitted. See Explanatory Notes.)

34.82      Wells Fargo Bank, National Association, asCustodian of the 50 Varick Street Mortgage Loan (see Exhibit 34.7)

34.83      Park Bridge Lender Services LLC, as OperatingAdvisor of the 50 Varick Street Mortgage Loan (see Exhibit 34.52)

34.84      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.11)

34.85      Wells Fargo Bank, National Association, as PrimaryServicer of the Macedonia Commons Mortgage Loan (see Exhibit 34.1)

34.86      Argentic Services Company LP, as Special Servicer of the Macedonia CommonsMortgage Loan (Omitted. See Explanatory Notes.)

34.87      Wilmington Trust, National Association, as Trustee of the Macedonia CommonsMortgage Loan (Omitted. See Explanatory Notes.)

34.88      Wells Fargo Bank, National Association, asCustodian of the Macedonia Commons Mortgage Loan (see Exhibit 34.7)

34.89      Trimont Real Estate Advisors, LLC, as OperatingAdvisor of the Macedonia Commons Mortgage Loan (see Exhibit 34.45)

34.90      CoreLogic Solutions, LLC, as Servicing FunctionParticipant of the Macedonia Commons Mortgage Loan (see Exhibit 34.9)

34.91      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.11)

35           Servicer compliance statements.

35.1        Wells Fargo Bank, National Association, as MasterServicer

35.2        Rialto Capital Advisors, LLC, as Special Servicer

35.3        AEGON USA Realty Advisors, LLC, as Special Servicer of the Fairmount atBrewerytown Mortgage Loan prior to January 21, 2021 (Omitted. See ExplanatoryNotes.)

35.4        Situs Holdings, LLC, as Special Servicer of the Fairmount at BrewerytownMortgage Loan on and after January 21, 2021 (Omitted. See Explanatory Notes.)

35.5        Wells Fargo Bank, National Association, asCertificate Administrator

35.6        Computershare Trust Company, National Association,as Servicing Function Participant for the Certificate Administrator on andafter November 1, 2021

35.7        Wells Fargo Bank, National Association, as PrimaryServicer of The District Mortgage Loan (see Exhibit 35.1)

35.8        Rialto Capital Advisors, LLC, as Special Servicerof The District Mortgage Loan (see Exhibit 35.2)

35.9        Wells Fargo Bank, National Association, as PrimaryServicer of the Meridian Sunrise Village Mortgage Loan (see Exhibit 35.1)

35.10      Rialto Capital Advisors, LLC, as Special Servicerof the Meridian Sunrise Village Mortgage Loan (see Exhibit 35.2)

35.11      Wells Fargo Bank, National Association, as PrimaryServicer of the Bank of America Office Campus Building 600 Mortgage Loan (seeExhibit 35.1)

35.12      Rialto Capital Advisors, LLC, as Special Servicerof the Bank of America Office Campus Building 600 Mortgage Loan (see Exhibit35.2)

35.13      Wells Fargo Bank, National Association, as Primary Servicerof the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 35.1)

35.14      Rialto Capital Advisors, LLC, as Special Servicerof the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 35.2)

35.15      Wells Fargo Bank, National Association, as PrimaryServicer of the 245 Park Avenue Mortgage Loan

35.16      AEGON USA Realty Advisors, LLC, as Special Servicer of the 245 Park AvenueMortgage Loan prior to April 13, 2021 (Omitted. See Explanatory Notes.)

35.17      Situs Holdings, LLC, as Special Servicer of the 245 Park Avenue Mortgage Loanon and after April 13, 2021 (Omitted. See Explanatory Notes.)

35.18      KeyBank National Association, as Primary Servicer of the Del Amo Fashion CenterMortgage Loan (Omitted. See Explanatory Notes.)

35.19      Situs Holdings, LLC, successor to Cohen Financial, a Division of Truist Bank,successor by merger to SunTrust Bank, as Special Servicer of the Del AmoFashion Center Mortgage Loan (Omitted. See Explanatory Notes.)

35.20      Midland Loan Services, a Division of PNC Bank, National Association, as PrimaryServicer of the Park West Village Mortgage Loan (Omitted. See ExplanatoryNotes.)

35.21      Midland Loan Services, a Division of PNC Bank, National Association, as SpecialServicer of the Park West Village Mortgage Loan (Omitted. See ExplanatoryNotes.)

35.22      Midland Loan Services, a Division of PNC Bank, National Association, as PrimaryServicer of the TZA Multifamily Portfolio I Mortgage Loan (Omitted. SeeExplanatory Notes.)

35.23      Midland Loan Services, a Division of PNC Bank, National Association, as SpecialServicer of the TZA Multifamily Portfolio I Mortgage Loan (Omitted. SeeExplanatory Notes.)

35.24      Wells Fargo Bank, National Association, as PrimaryServicer of the 237 Park Avenue Mortgage Loan (see Exhibit 35.1)

35.25      Wells Fargo Bank, National Association, as SpecialServicer of the 237 Park Avenue Mortgage Loan

35.26      KeyBank National Association, as Primary Servicer of the JW Marriott ChicagoMortgage Loan (Omitted. See Explanatory Notes.)

35.27      Rialto Capital Advisors, LLC, as Special Servicerof the JW Marriott Chicago Mortgage Loan (see Exhibit 35.2)

35.28      Midland Loan Services, a Division of PNC Bank, National Association, as PrimaryServicer of the 50 Varick Street Mortgage Loan (Omitted. See ExplanatoryNotes.)

35.29      Midland Loan Services, a Division of PNC Bank, National Association, as SpecialServicer of the 50 Varick Street Mortgage Loan (Omitted. See ExplanatoryNotes.)

35.30      Wells Fargo Bank, National Association, as PrimaryServicer of the Macedonia Commons Mortgage Loan (see Exhibit 35.1)

35.31      Argentic Services Company LP, as Special Servicer of the Macedonia CommonsMortgage Loan (Omitted. See Explanatory Notes.)

99.1         Mortgage Loan Purchase Agreement, dated as of September29, 2017, between UBS AG, by and through its branch office at 1285 Avenue ofthe Americas, New York, New York and UBS Commercial Mortgage SecuritizationCorp. (filed as Exhibit 99.1 to the registrant’s Current Report on Form 8-Kfiled on October 18, 2017 under Commission File No. 333-207340-04 andincorporated by reference herein)

99.2         Mortgage Loan Purchase Agreement, dated as of September29, 2017, between Société Générale and UBS Commercial Mortgage SecuritizationCorp. (filed as Exhibit 99.2 to the registrant’s Current Report on Form 8-Kfiled on October 18, 2017 under Commission File No. 333-207340-04 andincorporated by reference herein)

99.3         Mortgage Loan Purchase Agreement, dated as of September29, 2017, between Ladder Capital Finance LLC, Ladder Capital Finance HoldingsLLLP, Series REIT of Ladder Capital Finance Holdings LLLP, Series TRS of LadderCapital Finance Holdings LLLP and UBS Commercial Mortgage Securitization Corp.(filed as Exhibit 99.3 to the registrant’s Current Report on Form 8-K filed onOctober 18, 2017 under Commission File No. 333-207340-04 and incorporated byreference herein)

99.4         Mortgage Loan Purchase Agreement, dated as of September29, 2017, between Rialto Mortgage Finance, LLC and UBS Commercial MortgageSecuritization Corp. (filed as Exhibit 99.4 to the registrant’s Current Reporton Form 8-K filed on October 18, 2017 under Commission File No. 333-207340-04and incorporated by reference herein)

99.5         Mortgage Loan Purchase Agreement, dated as of September29, 2017, between CIBC Inc. and UBS Commercial Mortgage Securitization Corp.(filed as Exhibit 99.5 to the registrant’s Current Report on Form 8-K filed onOctober 18, 2017 under Commission File No. 333-207340-04 and incorporated byreference herein)

99.6         Mortgage Loan Purchase Agreement, dated as of September29, 2017, between Natixis Real Estate Capital LLC and UBS Commercial MortgageSecuritization Corp. (filed as Exhibit 99.6 to the registrant’s Current Reporton Form 8-K filed on October 18, 2017 under Commission File No. 333-207340-04and incorporated by reference herein)

(b)   The exhibits required to be filed by theRegistrant pursuant to Item 601 of Regulation S-K are listed above.

(c)    Not Applicable.

 

**SIGNATURES**

Pursuant to the requirements of Section 13 or 15(d) of the SecuritiesExchange Act of 1934, the registrant has duly caused this report to be signedon its behalf by the undersigned, thereunto duly authorized.

UBS Commercial MortgageSecuritization Corp.(Depositor)

/s/Nicholas Galeone

NicholasGaleone, President

(senior officer in charge ofsecuritization of the depositor)

Date: March 10, 2022

/s/ AndrewLisa

Andrew Lisa, Associate Director

Date: March 10, 2022