**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, 2018or**

**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**

**(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**

**Rialto Mortgage Finance, LLC**

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

** **

**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 Number)** |
|------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------|

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

**as Certificate Administrator**

**9062 Old Annapolis Road**

**Columbia, MD**

**(Address of principalexecutive offices 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 theAct:  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 Form 10-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 accelerated filer       o                                                                                         Accelerated filer                               o

Non-acceleratedfiler        ⌧ (Do not check if a smaller 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 ExchangeAct.                               o

Indicate by check mark whether the registrant is a shellcompany (as defined in Rule 12b-2 of the Act).  o Yes ⌧ 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.

 

 

The District Mortgage Loan, the Medirian Sunrise VillageMortgage Loan, the Bank of America Office Campus Building 600 Mortgage Loan andthe DoubleTree Berkeley Marina Mortgage Loan, which constituted approximately4.9%, 3.1%, 2.4% and 1.7%, respectively, of the asset pool of the issuingentity as of its cut-off date, are each an asset of the issuing entity and areeach part of a loan combination that includes (a) with respect to The DistrictMortgage Loan which is an asset of the issuing entity and three other *paripassu* loans, which are not assets of the issuing entity, (b) with respectto the Medirian Sunrise Village Mortgage Loan which is an asset of the issuingentity and 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 which is an asset of the issuing entity and one other *paripassu* loan, which is not an asset of the issuing entity and (d) withrespect to the DoubleTree Berkeley Marina Mortgage Loan which is an asset ofthe issuing entity and three other *pari passu* loans, which are notassets of the issuing entity. These loan combinations, including The DistrictMortgage Loan, the Medirian Sunrise Village Mortgage Loan, the Bank of AmericaOffice Campus Building 600 Mortgage Loan and the DoubleTree Berkeley MarinaMortgage Loan, are being serviced and administered pursuant to the Pooling andServicing Agreement, which is incorporated by reference as Exhibit 4.1 to thisAnnual Report on Form 10-K. Wells Fargo Bank, National Association is themaster servicer under the Pooling and Servicing Agreement.  Theresponsibilities of Wells Fargo Bank, National Association, as primary servicerof each of these loan combinations with respect to the issuing entity, aresubsumed within its responsibilities as master servicer under the Pooling andServicing Agreement.  Thus, the servicer compliance statement provided byWells Fargo Bank, National Association, as master servicer under the Poolingand Servicing Agreement, encompasses its roles as both master servicer andprimary servicer with respect to these loan combinations.

The Exhibit Index describesexhibits provided by certain parties (in their capacities indicated on theExhibit Index) with respect to the 245 Park Avenue Mortgage Loan, whichconstituted approximately 3.8% of the asset pool of the issuing entity as ofits cut-off date.  The 245 Park Avenue Mortgage Loan is an asset of the issuingentity and is part of a loan combination that includes the 245 Park AvenueMortgage Loan and 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.  Wells Fargo Bank,National Association is the master servicer under the trust and servicingagreement for the 245 Park Avenue Trust 2017-245P Transaction.  Theresponsibilities of Wells Fargo Bank, National Association, as primary servicerof this loan combination with respect to the issuing entity, are subsumedwithin its responsibilities as master servicer under the trust and servicingagreement for the 245 Park Avenue Trust 2017-245P Transaction.  Thus, theservicer compliance statement provided by Wells Fargo Bank, NationalAssociation, as master servicer under such trust and servicing agreement, encompassesits roles as both master servicer and primary servicer with respect to thisloan combination.

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 and thirty-two other *pari passu* loans andtwelve subordinate companion loans, which are not assets of the issuing entity.A *pari passu* portion of the loan combination was securitized in the DelAmo 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.  KeyBankNational Association is the master servicer under the trust and servicingagreement for the DAFC 2017-AMO Transaction.  The responsibilities ofKeyBank National Association, as primary servicer of this loan combination withrespect to the issuing entity, are subsumed within its responsibilities asmaster servicer under the trust and servicing agreement for the DAFC 2017-AMOTransaction.

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 and 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 and 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.  Midland Loan Services, a Divisionof PNC Bank, National Association is the master servicer under the pooling andservicing agreement for the UBS 2017-C2 Transaction.  The responsibilitiesof Midland Loan Services, a Division of PNC Bank, National Association, asprimary servicer of these loan combinations with respect to the issuing entity,are subsumed within its responsibilities as master servicer under the poolingand servicing agreement for the UBS 2017-C2 Transaction.  Thus, theservicer compliance statement provided by Midland Loan Services, a Division ofPNC Bank, National Association, as master servicer under such pooling andservicing agreement, encompasses its roles as both master servicer and primaryservicer with respect to these loan combinations.

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 and fourteen other *pari passu* loans and twosubordinate 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.  Wells Fargo Bank, NationalAssociation is the master servicer under the trust and servicing agreement forthe MSSG Trust 2017-237P Transaction.  The responsibilities of Wells FargoBank, National Association, as primary servicer of this loan combination withrespect to the issuing entity, are subsumed within its responsibilities asmaster servicer under the trust and servicing agreement for the MSSG Trust2017-237P Transaction.  Thus, the servicer compliance statement providedby Wells Fargo Bank, National Association, as master servicer under such trustand servicing agreement, encompasses its roles as both master servicer andprimary servicer with respect to this loan combination.

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 of theissuing entity and is part of a loan combination that includes the JW MarriottChicago Mortgage Loan and two other *pari passu* loans and threesubordinate companion loans, which are not assets of the issuing entity. A *paripassu* portion of the loan combination was securitized in the CSAIL 2017-CX9Commercial Mortgage Trust transaction, Commission File Number 333-207361-06(the “CSAIL 2017-CX9 Transaction”). This loan combination, including theJW Marriott Chicago Mortgage Loan, is being serviced and administered pursuantto the pooling and servicing agreement for the CSAIL 2017-CX9 Transaction,which is incorporated by reference as Exhibit 4.6 to this Annual Report on Form10-K.  KeyBank National Association is the master servicer under thepooling and servicing agreement for the CSAIL 2017-CX9 Transaction.  Theresponsibilities of KeyBank National Association, as primary servicer of thisloan combination with respect to the issuing entity, are subsumed within itsresponsibilities as master servicer under the pooling and servicing agreementfor the CSAIL 2017-CX9 Transaction.

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.  Midland Loan Services, aDivision of PNC Bank, National Association is the master servicer under thepooling and servicing agreement for the UBS 2017-C5 Transaction.  Theresponsibilities of Midland Loan Services, a Division of PNC Bank, NationalAssociation, as primary servicer of this loan combination with respect to theissuing entity, are subsumed within its responsibilities as master servicerunder the pooling and servicing agreement for the UBS 2017-C5Transaction.  Thus, the servicer compliance statement provided by MidlandLoan Services, a Division of PNC Bank, National Association, as master servicerunder such pooling and servicing agreement, encompasses its roles as bothmaster servicer and primary servicer with respect to this loan combination.

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.  WellsFargo Bank, National Association is the master servicer under the pooling andservicing agreement for the WFCM 2017-C41 Transaction.  Theresponsibilities of Wells Fargo Bank, National Association, as primary servicerof this loan combination with respect to the issuing entity, are subsumedwithin its responsibilities as master servicer under the pooling and servicingagreement for the WFCM 2017-C41 Transaction.  Thus, the servicer compliancestatement provided by Wells Fargo Bank, National Association, as masterservicer under such pooling and servicing agreement, encompasses its roles asboth master servicer and primary servicer with respect to this loancombination.

Wells Fargo Bank, NationalAssociation is the master servicer and certificate administrator of themortgage loans serviced under the Pooling and Servicing Agreement, the primaryservicer, special servicer and certificate administrator of the 237 Park AvenueMortgage Loan, the certificate administrator of the Park West Village MortgageLoan, the 50 Varick Street Mortgage Loan, the JW Marriott Chicago MortgageLoan, the TZA Multifamily Portfolio I Mortgage Loan and the Del Amo FashionCenter Mortgage Loan and the primary servicer and certificate administrator ofthe 245 Park Avenue Mortgage Loan and the Macedonia Commons Mortgage Loan. As aresult, Wells Fargo Bank, National Association is a “servicer” as defined inItem 1108(a)(2)(iii) of Regulation AB, in the capacities described above,because it is servicing mortgage loans that constituted 10% or more of theassets of the issuing entity as of its cut-off date. The assessments ofcompliance with applicable servicing criteria, accountants’ attestation reportsand servicer compliance statements delivered by Wells Fargo Bank, NationalAssociation in the capacities described above are listed 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 245 Park Avenue Mortgage Loan, the MacedoniaCommons Mortgage Loan and the Del Amo Fashion Center Mortgage Loan and thetrustee and custodian of the Park West Village Mortgage Loan, the 50 VarickStreet Mortgage Loan, the JW Marriott Chicago Mortgage Loan and the TZAMultifamily Portfolio I Mortgage Loan.  As a result, Wells Fargo Bank,National Association is a servicing function participant in the capacitiesdescribed above, because it is servicing mortgage loans that constituted 5% ormore of the assets of the issuing entity as of its cut-off date. Theassessments of compliance with applicable servicing criteria and accountants’attestation reports delivered by Wells Fargo Bank, National Association in thecapacities 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 servicingmortgage loans that constituted 10% or more of the assets of the issuing entityas of its 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, isthe special servicer of the Fairmount at Brewerytown Mortgage Loan and the 245Park Avenue Mortgage Loan.  These mortgage loans constitute more than 5%,but less than 10%, of the pool assets of the issuing entity.  Therefore,the Depositor included in this Annual Report on Form 10-K an assessment ofcompliance with applicable servicing criteria for AEGON USA Realty Advisors,LLC and an accountants’ attestation report pursuant to Item 1122 of RegulationAB because AEGON USA Realty Advisors, LLC is servicing more than 5% of the poolassets.  However, the Depositor is not required to include in this AnnualReport on Form 10-K a servicer compliance statement pursuant to Item 1123 ofRegulation AB of AEGON USA Realty Advisors, LLC because AEGON USA RealtyAdvisors, LLC is an unaffiliated servicer servicing less than 10% of poolassets.

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.

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 Park West Village Mortgage Loan, the 50 Varick Street Mortgage Loan andthe TZA Multifamily Portfolio I Mortgage Loan.  These mortgage loansconstitute more than 5%, but less than 10%, of the pool assets of the issuingentity.  Therefore, the Depositor included in this Annual Report on Form10-K an assessment of compliance with applicable servicing criteria for MidlandLoan Services, a Division of PNC Bank, National Association and an accountants’attestation report pursuant to Item 1122 of Regulation AB because Midland LoanServices, a Division of PNC Bank, National Association is servicing more than5% of the pool assets.  However, the Depositor is not required to includein this Annual Report on Form 10-K a servicer compliance statement pursuant toItem 1123 of Regulation AB of Midland Loan Services, a Division of PNC Bank,National Association because Midland Loan Services, a Division of PNC Bank,National Association is an unaffiliated servicer servicing less than 10% ofpool assets.

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.

Wilmington Trust, NationalAssociation acts as trustee of the mortgage loans serviced under the Poolingand Servicing Agreement, the 237 Park Avenue Mortgage Loan, the 245 Park AvenueMortgage Loan, the Macedonia Commons Mortgage Loan and the Del Amo FashionCenter Mortgage Loan.  Pursuant to the Pooling and Servicing Agreement,the trust and servicing agreement for the MSSG Trust 2017-237P Transaction, thetrust and servicing agreement for the 245 Park Avenue Trust 2017-245PTransaction, the pooling and servicing agreement for the WFCM 2017-C41Transaction and the trust and servicing agreement for the DAFC 2017-AMOTransaction, the trustee is required to provide an assessment of compliance withapplicable servicing criteria solely with respect to Item 1122(d)(2)(iii) ofRegulation AB (regarding advances of funds or guarantees regarding collections,cash flows or distributions, and any interest or other fees charged for suchadvances, are made, reviewed and approved as specified in the transactionagreements). However, during the reporting period, the trustee did not performany servicing function with respect to the servicing criteria specified in Item1122(d)(2)(iii) of Regulation AB.  The master servicer or the specialservicer, to the extent required, performed the servicing function identifiedwith respect to Item 1122(d)(2)(iii) of Regulation AB, and each such partyincluded Item 1122(d)(2)(iii) of Regulation AB in the assessment of compliancewith applicable servicing criteria and accountant’s attestation report for thesubject transaction.  As a result, this Annual Report on Form 10-K doesnot include an assessment of compliance with applicable servicing criteria ofthe trustee. One or more other servicers of the mortgage loans serviced underthe Pooling and Servicing Agreement, the 237 Park Avenue Mortgage Loan, the 245Park Avenue Mortgage Loan, the Macedonia Commons Mortgage Loan and the Del AmoFashion Center Mortgage Loan have delivered one or more assessments ofcompliance with respect to Item 1122(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 Commercial Real EstateServices, Inc. and National Tax Search, LLC.  These entities were engagedby the master servicer under the Pooling and Servicing Agreement and theprimary servicer of the 237 Park Avenue Mortgage Loan, the 245 Park AvenueMortgage Loan and the Macedonia Commons Mortgage Loan to remit tax paymentsreceived from the escrow accounts of borrowers to local taxing authorities, toreport tax amounts due, to verify tax parcel information, and to verifynon-escrow tax payments. These servicing functions are included within theservicing criteria set forth in Items 1122(d)(4)(xi) and 1122(d)(4)(xii) ofRegulation AB.  Therefore, under the principles-based definition of“servicer” set forth in Item 1101(j) of Regulation AB that looks to the functionsthat an entity performs, these vendors are “servicers” for the purposes of Item1122 of Regulation AB.  *See* Compliance and DisclosureInterpretations, Section 301.01 (Item 1101(j)).

With respect to the *pari passu*loan combinations that includes the Park West Village Mortgage Loan, the 245Park Avenue Mortgage Loan, the 50 Varick Street Mortgage Loan, the MacedoniaCommons Mortgage Loan, the JW Marriott Chicago Mortgage Loan, the TZAMultifamily Portfolio I Mortgage Loan and the Del Amo Fashion Center MortgageLoan, (i) the reports on assessment of compliance with servicing criteria andattestation reports on assessment of compliance with servicing criteria of LNRPartners, LLC as special servicer of the Macedonia Commons Mortgage Loan,KeyBank National Association as master servicer of the JW Marriott ChicagoMortgage Loan and the Del Amo Fashion Center Mortgage Loan, and CohenFinancial, a Division of SunTrust Bank as special servicer of the Del AmoFashion Center Mortgage Loan, listed on the Exhibit Index are omitted from thisAnnual Report on Form 10-K as they are not required to be included on thisAnnual 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 (ii) theservicer compliance statements of Midland Loan Services, a Division of PNCBank, National Association as master servicer of the 50 Varick Street MortgageLoan, the TZA Multifamily Portfolio I Mortgage Loan and the Park West VillageMortgage Loan, AEGON USA Realty Advisors, LLC as special servicer of theFairmount at Brewerytown Mortgage Loan and the 245 Park Avenue Mortgage Loan,LNR Partners, LLC as special servicer of the Macedonia Commons Mortgage Loan,KeyBank National Association as master servicer of the JW Marriott ChicagoMortgage Loan and the Del Amo Fashion Center Mortgage Loan, and CohenFinancial, a Division of SunTrust Bank as special servicer of the Del AmoFashion Center Mortgage Loan, listed on the Exhibit Index are omitted from thisAnnual Report on Form 10-K as they are not required by Item 1123 of RegulationAB to be included on this Annual Report on Form 10-K because they are each anunaffiliated party that is not a “servicer” that meets the criteria in Item1108(a)(2)(i) through (iii) of Regulation 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 externalcreditenhancement 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:

Since June 18, 2014, a group of institutional investors havefiled civil complaints in the Supreme Court of the State of New York, New YorkCounty, and later the U.S. District Court for the Southern District of New Yorkagainst Wells Fargo Bank, N.A., (“Wells Fargo Bank”) in its capacity as trusteefor certain residential mortgage backed securities (“RMBS”) trusts.  Thecomplaints against Wells Fargo Bank alleged that the trustee caused losses toinvestors and asserted causes of action based upon, among other things, thetrustee's alleged failure to: (i) notify and enforce repurchase obligations ofmortgage loan sellers for purported breaches of representations and warranties,(ii) notify investors of alleged events of default, and (iii) abide byappropriate standards of care following alleged events of default. Reliefsought included money damages in an unspecified amount, reimbursement ofexpenses, and equitable relief. Wells Fargo Bank has reached an agreement, inwhich it denies any wrongdoing, to resolve these claims on a classwide basisfor the 271 RMBS trusts currently at issue.  The settlement agreement issubject to court approval.  Separate lawsuits against Wells Fargo Bankmaking similar allegations filed by certain other institutional investorsconcerning 57 RMBS trusts in New York federal and state court are not coveredby the agreement.  With respect to the foregoing litigations, Wells FargoBank believes plaintiffs' claims are without merit and intends to contest theclaims 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 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 servicing agreementfor the 245 Park Avenue Trust 2017-245P 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 245 Park Avenue Trust 2017-245P Transactionincorporated by reference as Exhibit 4.2 to this Annual Report on Form 10-K isa chart identifying the entities participating in a servicing function for the245 Park Avenue Trust 2017-245P Transaction responsible for each applicableservicing 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 Mortgage Loan,which is being serviced and administered pursuant to the trust and servicingagreement for the DAFC 2017-AMO Transaction, are attached hereto under Item 15to this Annual Report on Form 10-K. Attached as Exhibit L to the trust andservicing agreement for the DAFC 2017-AMO Transaction incorporated by referenceas Exhibit 4.3 to this Annual Report on Form 10-K is a chart identifying theentities participating in a servicing function for the DAFC 2017-AMOTransaction 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 Park West Village Mortgage Loan andthe 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 chartidentifying the entities participating in a servicing function for the CSAIL2017-CX9 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 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 with applicableservicing criteria furnished pursuant to Item 1122 of Regulation AB by MidlandLoan Services, a Division of PNC Bank National Association discloses that amaterial instance of noncompliance occurred, as described below:

Material Instance of Noncompliance

In certain instances, the ScheduleAL Files (Item 1125 of Regulation AB) were not reported in accordance with theterms specified in the transaction agreements, in conflict with Item1122(d)(3)(i): “Reports to investors, including those to be filed with theCommission, are maintained in accordance with the transaction agreements andapplicable Commission requirements. Specifically, such reports: (A) Areprepared in accordance with timeframes and other terms set forth in thetransaction agreements”.  The noncompliance consisted of omitted orinaccurately reported numbers due to the following: (1) the initial setup filescontained information at the asset level, and Midland was required to manuallycompile the information to present it at the loan level as required by ScheduleAL; and (2) certain reporting requirements required manual processing byMidland, including the use of various data computation formulas, qualitycontrol checks and analysis.

The identified instances did notinvolve the servicing of assets included in this securitization.

Steps Taken to Remedy the Material Instance of Noncompliance

Midland is currently remediating theSchedule AL reporting for the CMBS transactions found to be incorrect, and willbe making improvements to its systems, processes and procedures to support itsSchedule AL reporting obligations.

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

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

**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          Poolingand Servicing Agreement, dated as of October 1, 2017, by and among UBS CommercialMortgage Securitization Corp., as Depositor, Wells Fargo Bank, NationalAssociation, as Master Servicer, Rialto Capital Advisors, LLC, as SpecialServicer, AEGON USA Realty Advisors, LLC, as Fairmount at Brewerytown SpecialServicer, Wells Fargo Bank, National Association, as Certificate Administrator,Wilmington Trust, National Association, as Trustee, and Pentalpha SurveillanceLLC, as Operating Advisor and as Asset Representations Reviewer (filed asExhibit 4.1 to the registrant’s Current Report on Form 8-K/A filed on November22, 2017 under Commission File No. 333-207340-04 and incorporated by referenceherein).

4.2          Trustand Servicing Agreement, dated as of May 30, 2017, by and among J.P. MorganChase Commercial Mortgage Securities Corp., as Depositor, Wells Fargo Bank,National Association, as Servicer, AEGON USA Realty Advisors, LLC, as SpecialServicer, Wells Fargo Bank, National Association, as Certificate Administrator,Wilmington Trust, National Association, as Trustee, and Trimont Real EstateAdvisors, LLC, as Operating Advisor (filed as Exhibit 4.4 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).

4.3          Trustand Servicing Agreement, dated as of June 20, 2017, by and among Banc ofAmerica Merrill Lynch Large Loan, Inc., as Depositor, KeyBank NationalAssociation, as Servicer, Cohen Financial, a Division of SunTrust Bank, asSpecial Servicer, Wells Fargo Bank, National Association, as CertificateAdministrator, Wilmington Trust, National Association, as Trustee, and ParkBridge Lender Services LLC, as Operating Advisor (filed as Exhibit 4.6 to theregistrant’s Current Report on Form 8-K filed on October 18, 2017 underCommission File No. 333-207340-04 and incorporated by reference herein).

4.4          Poolingand Servicing Agreement, dated as of August 1, 2017, by and among UBSCommercial Mortgage Securitization Corp., as Depositor, Midland Loan Services,a Division of PNC Bank, National Association, as Master Servicer and as SpecialServicer, Wells Fargo Bank, National Association, as Certificate Administratorand as Trustee, and Park Bridge Lender Services LLC, as Operating Advisor andas Asset Representations Reviewer (filed as Exhibit 4.3 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).

4.5          Trustand Servicing Agreement, dated as of August 9, 2017, by and among MorganStanley Capital I Inc., as Depositor, Wells Fargo Bank, National Association,as Servicer, Wells Fargo Bank, National Association, as Special Servicer,Wilmington Trust, National Association, as Trustee, Wells Fargo Bank, NationalAssociation, as Certificate Administrator and Custodian, and Park Bridge LenderServices LLC, as Operating Advisor (filed as Exhibit 4.2 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).

4.6          Poolingand Servicing Agreement, dated as of September 1, 2017, by and among CreditSuisse Commercial Mortgage Securities Corp., as Depositor, KeyBank NationalAssociation, as Master Servicer, Rialto Capital Advisors, LLC, as SpecialServicer, Wells Fargo Bank, National Association, as Certificate Administratorand as Trustee, and Pentalpha Surveillance LLC, as Operating Advisor and asAsset Representations Reviewer (filed as Exhibit 4.5 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).

4.7          Poolingand Servicing Agreement, dated as of November 1, 2017, by and among UBSCommercial Mortgage Securitization Corp., as Depositor, Midland Loan Services,a Division of PNC Bank, National Association, as Master Servicer and as SpecialServicer, Wells Fargo Bank, National Association, as Certificate Administrator,as Cayman Agent and as Trustee, and Park Bridge Lender Services LLC, asOperating Advisor and as Asset Representations Reviewer (filed as Exhibit 4.1to the registrant’s Current Report on Form 8-K/A filed on December 5, 2017under Commission File No. 333-207340-04 and incorporated by reference herein).

4.8          Poolingand Servicing Agreement, dated as of November 1, 2017, by and among Wells FargoCommercial Mortgage Securities, Inc., as Depositor, Wells Fargo Bank, NationalAssociation, as Master Servicer, LNR Partners, LLC, as Special Servicer, WellsFargo Bank, National Association, as Certificate Administrator, WilmingtonTrust, National Association, as Trustee, and Trimont Real Estate Advisors, LLC,as Operating Advisor and as Asset Representations Reviewer (filed as Exhibit4.1 to the registrant’s Current Report on Form 8-K filed on December 5, 2017under Commission File No. 333-207340-04 and incorporated by reference herein).

4.9          AgreementBetween Note Holders, dated as of August 23, 2017, by and between MorganStanley Bank, N.A., as Initial Note A-1 Holder and Initial Note B-1 Holder, andSociété Générale, as Initial Note A-2 Holder and Initial Note B-2 Holder (filedas Exhibit 4.7 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).

4.10        AgreementAmong Noteholders, dated as of July 19, 2017, by and among UBS AG, by andthrough its branch office at 1285 Avenue of the Americas, New York, New York,as Initial Note A-1 Holder, Initial Note A-2 Holder, Initial Note A-3 Holder,Initial Note A-4 Holder, Initial Note A-5 Holder, and Initial Note A-6 Holder,and Athene Annuity and Life Company, an Iowa company doing business in New Yorkunder fictitious name MLS, Athene Iowa, as Initial Note B-1 Holder and InitialNote B-2 Holder, and Athene Annuity & Life Assurance Company, a Delawarecompany doing business in New York under fictitious name MLS, Athene Delaware,as Initial Note B-3 Holder (filed as Exhibit 4.8 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).

4.11        AgreementBetween Note Holders, dated as of August 31, 2017, by and between UBS AG, byand through its branch office at 1285 Avenue of the Americas, New York, NewYork, as Initial Note A-1 Holder, UBS AG, by and through its branch office at1285 Avenue of the Americas, New York, New York, as Initial Note A-2 Holder,UBS AG, by and through its branch office at 1285 Avenue of the Americas, NewYork, New York, as Initial Note A-3 Holder, UBS AG, by and through its branchoffice at 1285 Avenue of the Americas, New York, New York, as Initial Note A-4Holder, and UBS AG, by and through its branch office at 1285 Avenue of theAmericas, New York, New York, as Initial Note A-5 Holder (filed as Exhibit 4.9to 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).

4.12        Co-LenderAgreement, dated as of May 30, 2017, by and among JPMorgan Chase Bank, NationalAssociation, Natixis Real Estate Capital LLC, Société Générale, Deutsche Bank,AG, New York Branch, and Barclays Bank PLC (filed as Exhibit 4.10 to theregistrant’s Current Report on Form 8-K filed on October 18, 2017 underCommission File No. 333-207340-04 and incorporated by reference herein).

4.13        Amendedand Restated Agreement Among Noteholders, dated as of August 17, 2017, by andamong UBS AG, by and through its branch office at 1285 Avenue of the Americas,New York, New York, as Initial Note A-1 Holder and Initial Note A-2 Holder, andTownsend Real Estate Fund, L.P., as Junior Noteholder (filed as Exhibit 4.11 tothe registrant’s Current Report on Form 8-K filed on October 18, 2017 underCommission File No. 333-207340-04 and incorporated by reference herein).

4.14        Co-LenderAgreement, dated as of October 18, 2017, between Ladder Capital Finance LLC, asNote A-1 Holder, and Ladder Capital Finance LLC, as Note A-2 Holder, and LadderCapital Finance LLC, as Note A-3 Holder (filed as Exhibit 4.12 to theregistrant’s Current Report on Form 8-K filed on October 18, 2017 underCommission File No. 333-207340-04 and incorporated by reference herein).

4.15        AgreementBetween Note Holders, dated as of October 18, 2017, by and between UBS AG, byand through its branch office at 1285 Avenue of the Americas, New York, NewYork, as Initial Note A-1 Holder, UBS AG, by and through its branch office at1285 Avenue of the Americas, New York, New York, as Initial Note A-2 Holder,and UBS AG, by and through its branch office at 1285 Avenue of the Americas,New York, New York, as Initial Note A-3 Holder (filed as Exhibit 4.13 to theregistrant’s Current Report on Form 8-K filed on October 18, 2017 underCommission File No. 333-207340-04 and incorporated by reference herein).

4.16        Co-LenderAgreement, dated as of October 18, 2017, between Ladder Capital Finance LLC, asNote A-1 Holder, and Ladder Capital Finance LLC, as Note A-2 Holder (filed asExhibit 4.14 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).

4.17        Co-LenderAgreement, dated as of October 18, 2017, between Ladder Capital Finance LLC, asNote A-1 Holder, and Ladder Capital Finance LLC, as Note A-2 Holder (filed asExhibit 4.15 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).

4.18        AgreementBetween Note Holders, dated as of October 18, 2017, by and between UBS AG, byand through its branch office at 1285 Avenue of the Americas, New York, NewYork, as Initial Note A-1-1 Holder, Initial Note A-1-2 Holder and Initial NoteA-1-3 Holder, and Argentic Real Estate Finance LLC, as Initial Note A-2 Holder(filed as Exhibit 4.16 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).

4.19        Co-LenderAgreement, dated as of July 28, 2017, by and between Natixis Real EstateCapital LLC, as Initial Note A-1 Holder, Natixis Real Estate Capital LLC, asInitial Note A-2 Holder, Natixis Real Estate Capital LLC, as Initial Note A-3Holder, Natixis Real Estate Capital LLC, as Initial Note B-1-A Holder, NatixisReal Estate Capital LLC, as Initial Note B-1-B Holder, and Natixis Real EstateCapital LLC, as Initial Note B-2 Holder (filed as Exhibit 4.17 to theregistrant’s Current Report on Form 8-K filed on October 18, 2017 underCommission File No. 333-207340-04 and incorporated by reference herein).

4.20        AgreementBetween Note Holders, dated as of August 17, 2017, by and between SociétéGénérale, as Initial Note A-1 Holder, and Société Générale, as Initial Note A-2Holder, and Société Générale, as Initial Note A-3 Holder, and Société Générale,as Initial Note A-4 Holder (filed as Exhibit 4.18 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).

4.21        Co-LenderAgreement, dated as of May 12, 2017, by and among Bank of America, N.A., asInitial Note 1 Holder, and Barclays Bank PLC, as Initial Note 2 Holder, andSociété Générale, as Initial Note 3 Holder, and Wells Fargo Bank, NationalAssociation, as Initial Note 4 Holder (filed as Exhibit 4.19 to theregistrant’s Current Report on Form 8-K filed on October 18, 2017 underCommission File No. 333-207340-04 and incorporated by reference herein).

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

33          Reports on assessment of compliance with servicing criteria forasset-backed securities.

33.1        Wells Fargo Bank,National Association, as Master Servicer

33.2        Rialto Capital Advisors,LLC, as Special Servicer

33.3        AEGON USA RealtyAdvisors, LLC, as Special Servicer of the Fairmount at Brewerytown MortgageLoan

33.4        Wilmington Trust, National Association, as Trustee(Omitted. See Explanatory Notes.)

33.5        Wells Fargo Bank,National Association, as Certificate Administrator

33.6        Wells Fargo Bank,National Association, as Custodian

33.7        Pentalpha SurveillanceLLC, as Operating Advisor

33.8        CoreLogic CommercialReal Estate Services, Inc., as Servicing Function Participant

33.9        National Tax Search,LLC, as Servicing Function Participant

33.10       Wells Fargo Bank, NationalAssociation, as Primary Servicer of The District Mortgage Loan (see Exhibit33.1) 

33.11       Rialto Capital Advisors, LLC,as Special Servicer of The District Mortgage Loan (see Exhibit 33.2) 

33.12       Wilmington Trust, National Association, as Trustee of TheDistrict Mortgage Loan (Omitted. See Explanatory Notes.)

33.13       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of The District Mortgage Loan (seeExhibit 33.5) 

33.14       Wells Fargo Bank, NationalAssociation, as Custodian of The District Mortgage Loan (see Exhibit 33.6) 

33.15       Pentalpha Surveillance LLC,as Operating Advisor of The District Mortgage Loan (see Exhibit 33.7) 

33.16       CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of The DistrictMortgage Loan (see Exhibit 33.8) 

33.17       National Tax Search, LLC, asServicing Function Participant of The District Mortgage Loan (see Exhibit 33.9)

33.18       Wells Fargo Bank, NationalAssociation, as Primary Servicer of the Medirian Sunrise Village Mortgage Loan(see Exhibit 33.1) 

33.19       Rialto Capital Advisors, LLC,as Special Servicer of the Medirian Sunrise Village Mortgage Loan (see Exhibit33.2) 

33.20       Wilmington Trust, National Association, as Trustee of theMedirian Sunrise Village Mortgage Loan (Omitted. See Explanatory Notes.)

33.21       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the Medirian Sunrise VillageMortgage Loan (see Exhibit 33.5) 

33.22       Wells Fargo Bank, NationalAssociation, as Custodian of the Medirian Sunrise Village Mortgage Loan (seeExhibit 33.6) 

33.23       Pentalpha Surveillance LLC,as Operating Advisor of the Medirian Sunrise Village Mortgage Loan (see Exhibit33.7) 

33.24       CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of the MedirianSunrise Village Mortgage Loan (see Exhibit 33.8) 

33.25       National Tax Search, LLC, asServicing Function Participant of the Medirian Sunrise Village Mortgage Loan(see Exhibit 33.9) 

33.26       Wells Fargo Bank, NationalAssociation, as Primary Servicer of the Bank of America Office Campus Building600 Mortgage Loan (see Exhibit 33.1) 

33.27       Rialto Capital Advisors, LLC,as Special Servicer of the Bank of America Office Campus Building 600 MortgageLoan (see Exhibit 33.2) 

33.28       Wilmington Trust, National Association, as Trustee of the Bankof America Office Campus Building 600 Mortgage Loan (Omitted. See ExplanatoryNotes.)

33.29       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the Bank of America Office CampusBuilding 600 Mortgage Loan (see Exhibit 33.5) 

33.30       Wells Fargo Bank, NationalAssociation, as Custodian of the Bank of America Office Campus Building 600Mortgage Loan (see Exhibit 33.6) 

33.31       Pentalpha Surveillance LLC,as Operating Advisor of the Bank of America Office Campus Building 600 MortgageLoan (see Exhibit 33.7) 

33.32       CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of the Bank of AmericaOffice Campus Building 600 Mortgage Loan (see Exhibit 33.8) 

33.33       National Tax Search, LLC, asServicing Function Participant of the Bank of America Office Campus Building600 Mortgage Loan (see Exhibit 33.9) 

33.34       Wells Fargo Bank, NationalAssociation, as Primary Servicer of the DoubleTree Berkeley Marina MortgageLoan (see Exhibit 33.1) 

33.35       Rialto Capital Advisors, LLC,as Special Servicer of the DoubleTree Berkeley Marina Mortgage Loan (seeExhibit 33.2) 

33.36       Wilmington Trust, National Association, as Trustee of theDoubleTree Berkeley Marina Mortgage Loan (Omitted. See Explanatory Notes.)

33.37       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the DoubleTree Berkeley MarinaMortgage Loan (see Exhibit 33.5) 

33.38       Wells Fargo Bank, NationalAssociation, as Custodian of the DoubleTree Berkeley Marina Mortgage Loan (seeExhibit 33.6) 

33.39       Pentalpha Surveillance LLC,as Operating Advisor of the DoubleTree Berkeley Marina Mortgage Loan (seeExhibit 33.7) 

33.40       CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of the DoubleTree BerkeleyMarina Mortgage Loan (see Exhibit 33.8) 

33.41       National Tax Search, LLC, asServicing Function Participant of the DoubleTree Berkeley Marina Mortgage Loan(see Exhibit 33.9) 

33.42       Wells Fargo Bank, NationalAssociation, as Primary Servicer of the 245 Park Avenue Mortgage Loan (seeExhibit 33.1) 

33.43       AEGON USA Realty Advisors,LLC, as Special Servicer of the 245 Park Avenue Mortgage Loan (see Exhibit33.3) 

33.44       Wilmington Trust, National Association, as Trustee of the 245Park Avenue Mortgage Loan (Omitted. See Explanatory Notes.)

33.45       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the 245 Park Avenue Mortgage Loan(see Exhibit 33.5) 

33.46       Wells Fargo Bank, NationalAssociation, as Custodian of the 245 Park Avenue Mortgage Loan (see Exhibit 33.6)

33.47       Trimont Real EstateAdvisors, LLC, as Operating Advisor of the 245 Park Avenue Mortgage Loan

33.48       CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of the 245 Park AvenueMortgage Loan (see Exhibit 33.8) 

33.49       National Tax Search, LLC, asServicing Function Participant of the 245 Park Avenue Mortgage Loan (seeExhibit 33.9) 

33.50       KeyBank National Association, as Primary Servicer of the DelAmo Fashion Center Mortgage Loan (Omitted. See Explanatory Notes.)

33.51       Cohen Financial, a Division of SunTrust Bank, as SpecialServicer of the Del Amo Fashion Center Mortgage Loan (Omitted. See ExplanatoryNotes.)

33.52       Wilmington Trust, National Association, as Trustee of the DelAmo Fashion Center Mortgage Loan (Omitted. See Explanatory Notes.)

33.53       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the Del Amo Fashion CenterMortgage Loan (see Exhibit 33.5) 

33.54       Wells Fargo Bank, NationalAssociation, as Custodian of the Del Amo Fashion Center Mortgage Loan (seeExhibit 33.6) 

33.55       Park Bridge Lender ServicesLLC, as Operating Advisor of the Del Amo Fashion Center Mortgage Loan

33.56       Midland Loan Services, aDivision of PNC Bank, National Association, as Primary Servicer of the ParkWest Village Mortgage Loan

33.57       Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the ParkWest Village Mortgage Loan (see Exhibit 33.56) 

33.58       Wells Fargo Bank, NationalAssociation, as Trustee and Certificate Administrator of the Park West VillageMortgage Loan (see Exhibit 33.5) 

33.59       Wells Fargo Bank, NationalAssociation, as Custodian of the Park West Village Mortgage Loan (see Exhibit33.6) 

33.60       Park Bridge Lender ServicesLLC, as Operating Advisor of the Park West Village Mortgage Loan (see Exhibit33.55) 

33.61       Midland Loan Services, aDivision of PNC Bank, National Association, as Primary Servicer of the TZAMultifamily Portfolio I Mortgage Loan (see Exhibit 33.56) 

33.62       Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the TZAMultifamily Portfolio I Mortgage Loan (see Exhibit 33.56) 

33.63       Wells Fargo Bank, NationalAssociation, as Trustee and Certificate Administrator of the TZA MultifamilyPortfolio I Mortgage Loan (see Exhibit 33.5) 

33.64       Wells Fargo Bank, NationalAssociation, as Custodian of the TZA Multifamily Portfolio I Mortgage Loan (seeExhibit 33.6) 

33.65       Park Bridge Lender ServicesLLC, as Operating Advisor of the TZA Multifamily Portfolio I Mortgage Loan (seeExhibit 33.55) 

33.66       Wells Fargo Bank, NationalAssociation, as Primary Servicer of the 237 Park Avenue Mortgage Loan (seeExhibit 33.1) 

33.67       Wells Fargo Bank, NationalAssociation, as Special Servicer of the 237 Park Avenue Mortgage Loan (seeExhibit 33.1) 

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

33.69       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the 237 Park Avenue Mortgage Loan(see Exhibit 33.5) 

33.70       Wells Fargo Bank, NationalAssociation, as Custodian of the 237 Park Avenue Mortgage Loan (see Exhibit33.6) 

33.71       Park Bridge Lender ServicesLLC, as Operating Advisor of the 237 Park Avenue Mortgage Loan (see Exhibit33.55) 

33.72       CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of the 237 Park AvenueMortgage Loan (see Exhibit 33.8) 

33.73       National Tax Search, LLC, asServicing Function Participant of the 237 Park Avenue Mortgage Loan (seeExhibit 33.9) 

33.74       KeyBank National Association, as Primary Servicer of the JWMarriott Chicago Mortgage Loan (Omitted. See Explanatory Notes.)

33.75       Rialto Capital Advisors, LLC,as Special Servicer of the JW Marriott Chicago Mortgage Loan (see Exhibit 33.2)

33.76       Wells Fargo Bank, National Association, as Trustee of the JWMarriott Chicago Mortgage Loan (Omitted. See Explanatory Notes.)

33.77       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the JW Marriott Chicago MortgageLoan (see Exhibit 33.5) 

33.78       Wells Fargo Bank, NationalAssociation, as Custodian of the JW Marriott Chicago Mortgage Loan (see Exhibit33.6) 

33.79       Pentalpha Surveillance LLC,as Operating Advisor of the JW Marriott Chicago Mortgage Loan (see Exhibit33.7) 

33.80       Midland Loan Services, a Divisionof PNC Bank, National Association, as Primary Servicer of the 50 Varick StreetMortgage Loan (see Exhibit 33.56) 

33.81       Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the 50Varick Street Mortgage Loan (see Exhibit 33.56) 

33.82       Wells Fargo Bank, NationalAssociation, as Trustee and Certificate Administrator of the 50 Varick StreetMortgage Loan (see Exhibit 33.5) 

33.83       Wells Fargo Bank, NationalAssociation, as Custodian of the 50 Varick Street Mortgage Loan (see Exhibit33.6) 

33.84       Park Bridge Lender ServicesLLC, as Operating Advisor of the 50 Varick Street Mortgage Loan (see Exhibit33.55) 

33.85       Wells Fargo Bank, NationalAssociation, as Primary Servicer of the Macedonia Commons Mortgage Loan (seeExhibit 33.1) 

33.86       LNR Partners, LLC, as Special Servicer of the Macedonia CommonsMortgage Loan (Omitted. See Explanatory Notes.)

33.87       Wilmington Trust, National Association, as Trustee of theMacedonia Commons Mortgage Loan (Omitted. See Explanatory Notes.)

33.88       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the Macedonia Commons MortgageLoan (see Exhibit 33.5) 

33.89       Wells Fargo Bank, NationalAssociation, as Custodian of the Macedonia Commons Mortgage Loan (see Exhibit33.6) 

33.90       Trimont Real EstateAdvisors, LLC, as Operating Advisor of the Macedonia Commons Mortgage Loan (seeExhibit 33.47) 

33.91       CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of the MacedoniaCommons Mortgage Loan (see Exhibit 33.8) 

33.92       National Tax Search, LLC, as ServicingFunction Participant of the Macedonia Commons Mortgage Loan (see Exhibit 33.9) 

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

34.1        Wells Fargo Bank,National Association, as Master Servicer

34.2        Rialto CapitalAdvisors, LLC, as Special Servicer

34.3        AEGON USA RealtyAdvisors, LLC, as Special Servicer of the Fairmount at Brewerytown MortgageLoan

34.4        Wilmington Trust, National Association, as Trustee(Omitted. See Explanatory Notes.)

34.5        Wells Fargo Bank, NationalAssociation, as Certificate Administrator

34.6        Wells Fargo Bank,National Association, as Custodian

34.7        Pentalpha SurveillanceLLC, as Operating Advisor

34.8        CoreLogic CommercialReal Estate Services, Inc., as Servicing Function Participant

34.9        National Tax Search,LLC, as Servicing Function Participant

34.10       Wells Fargo Bank, NationalAssociation, as Primary Servicer of The District Mortgage Loan (see Exhibit34.1) 

34.11       Rialto Capital Advisors, LLC,as Special Servicer of The District Mortgage Loan (see Exhibit 34.2) 

34.12       Wilmington Trust, National Association, as Trustee of TheDistrict Mortgage Loan (Omitted. See Explanatory Notes.)

34.13       Wells Fargo Bank, National Association,as Certificate Administrator of The District Mortgage Loan (see Exhibit 34.5) 

34.14       Wells Fargo Bank, NationalAssociation, as Custodian of The District Mortgage Loan (see Exhibit 34.6) 

34.15       Pentalpha Surveillance LLC,as Operating Advisor of The District Mortgage Loan (see Exhibit 34.7) 

34.16       CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of The DistrictMortgage Loan (see Exhibit 34.8) 

34.17       National Tax Search, LLC, asServicing Function Participant of The District Mortgage Loan (see Exhibit 34.9)

34.18       Wells Fargo Bank, NationalAssociation, as Primary Servicer of the Medirian Sunrise Village Mortgage Loan(see Exhibit 34.1) 

34.19       Rialto Capital Advisors, LLC,as Special Servicer of the Medirian Sunrise Village Mortgage Loan (see Exhibit34.2) 

34.20       Wilmington Trust, National Association, as Trustee of theMedirian Sunrise Village Mortgage Loan (Omitted. See Explanatory Notes.)

34.21       Wells Fargo Bank, National Association,as Certificate Administrator of the Medirian Sunrise Village Mortgage Loan (seeExhibit 34.5) 

34.22       Wells Fargo Bank, NationalAssociation, as Custodian of the Medirian Sunrise Village Mortgage Loan (seeExhibit 34.6) 

34.23       Pentalpha Surveillance LLC,as Operating Advisor of the Medirian Sunrise Village Mortgage Loan (see Exhibit34.7) 

34.24       CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of the MedirianSunrise Village Mortgage Loan (see Exhibit 34.8) 

34.25       National Tax Search, LLC, as ServicingFunction Participant of the Medirian Sunrise Village Mortgage Loan (see Exhibit34.9) 

34.26       Wells Fargo Bank, NationalAssociation, as Primary Servicer of the Bank of America Office Campus Building600 Mortgage Loan (see Exhibit 34.1) 

34.27       Rialto Capital Advisors, LLC,as Special Servicer of the Bank of America Office Campus Building 600 MortgageLoan (see Exhibit 34.2) 

34.28       Wilmington Trust, National Association, as Trustee of the Bankof America Office Campus Building 600 Mortgage Loan (Omitted. See ExplanatoryNotes.)

34.29       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the Bank of America Office CampusBuilding 600 Mortgage Loan (see Exhibit 34.5) 

34.30       Wells Fargo Bank, NationalAssociation, as Custodian of the Bank of America Office Campus Building 600Mortgage Loan (see Exhibit 34.6) 

34.31       Pentalpha Surveillance LLC,as Operating Advisor of the Bank of America Office Campus Building 600 MortgageLoan (see Exhibit 34.7) 

34.32       CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of the Bank of AmericaOffice Campus Building 600 Mortgage Loan (see Exhibit 34.8) 

34.33       National Tax Search, LLC, asServicing Function Participant of the Bank of America Office Campus Building600 Mortgage Loan (see Exhibit 34.9) 

34.34       Wells Fargo Bank, NationalAssociation, as Primary Servicer of the DoubleTree Berkeley Marina MortgageLoan (see Exhibit 34.1) 

34.35       Rialto Capital Advisors, LLC,as Special Servicer of the DoubleTree Berkeley Marina Mortgage Loan (seeExhibit 34.2) 

34.36       Wilmington Trust, National Association, as Trustee of theDoubleTree Berkeley Marina Mortgage Loan (Omitted. See Explanatory Notes.)

34.37       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the DoubleTree Berkeley MarinaMortgage Loan (see Exhibit 34.5) 

34.38       Wells Fargo Bank, NationalAssociation, as Custodian of the DoubleTree Berkeley Marina Mortgage Loan (seeExhibit 34.6) 

34.39       Pentalpha Surveillance LLC,as Operating Advisor of the DoubleTree Berkeley Marina Mortgage Loan (seeExhibit 34.7) 

34.40       CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of the DoubleTreeBerkeley Marina Mortgage Loan (see Exhibit 34.8) 

34.41       National Tax Search, LLC, asServicing Function Participant of the DoubleTree Berkeley Marina Mortgage Loan(see Exhibit 34.9) 

34.42       Wells Fargo Bank, National Association,as Primary Servicer of the 245 Park Avenue Mortgage Loan (see Exhibit 34.1) 

34.43       AEGON USA Realty Advisors,LLC, as Special Servicer of the 245 Park Avenue Mortgage Loan (see Exhibit34.3) 

34.44       Wilmington Trust, National Association, as Trustee of the 245Park Avenue Mortgage Loan (Omitted. See Explanatory Notes.)

34.45       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the 245 Park Avenue Mortgage Loan(see Exhibit 34.5) 

34.46       Wells Fargo Bank, NationalAssociation, as Custodian of the 245 Park Avenue Mortgage Loan (see Exhibit34.6) 

34.47       Trimont Real EstateAdvisors, LLC, as Operating Advisor of the 245 Park Avenue Mortgage Loan

34.48       CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of the 245 Park AvenueMortgage Loan (see Exhibit 34.8) 

34.49       National Tax Search, LLC, asServicing Function Participant of the 245 Park Avenue Mortgage Loan (seeExhibit 34.9) 

34.50       KeyBank National Association, as Primary Servicer of the DelAmo Fashion Center Mortgage Loan (Omitted. See Explanatory Notes.)

34.51       Cohen Financial, a Division of SunTrust Bank, as SpecialServicer of the Del Amo Fashion Center Mortgage Loan (Omitted. See ExplanatoryNotes.)

34.52       Wilmington Trust, National Association, as Trustee of the DelAmo Fashion Center Mortgage Loan (Omitted. See Explanatory Notes.)

34.53       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the Del Amo Fashion CenterMortgage Loan (see Exhibit 34.5) 

34.54       Wells Fargo Bank, NationalAssociation, as Custodian of the Del Amo Fashion Center Mortgage Loan (seeExhibit 34.6) 

34.55       Park Bridge Lender ServicesLLC, as Operating Advisor of the Del Amo Fashion Center Mortgage Loan

34.56       Midland Loan Services, aDivision of PNC Bank, National Association, as Primary Servicer of the Park WestVillage Mortgage Loan

34.57       Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the ParkWest Village Mortgage Loan (see Exhibit 34.56) 

34.58       Wells Fargo Bank, NationalAssociation, as Trustee and Certificate Administrator of the Park West VillageMortgage Loan (see Exhibit 34.5) 

34.59       Wells Fargo Bank, NationalAssociation, as Custodian of the Park West Village Mortgage Loan (see Exhibit34.6) 

34.60       Park Bridge Lender ServicesLLC, as Operating Advisor of the Park West Village Mortgage Loan (see Exhibit34.55) 

34.61       Midland Loan Services, aDivision of PNC Bank, National Association, as Primary Servicer of the TZAMultifamily Portfolio I Mortgage Loan (see Exhibit 34.56) 

34.62       Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the TZAMultifamily Portfolio I Mortgage Loan (see Exhibit 34.56) 

34.63       Wells Fargo Bank, National Association,as Trustee and Certificate Administrator of the TZA Multifamily Portfolio IMortgage Loan (see Exhibit 34.5) 

34.64       Wells Fargo Bank, National Association,as Custodian of the TZA Multifamily Portfolio I Mortgage Loan (see Exhibit34.6) 

34.65       Park Bridge Lender ServicesLLC, as Operating Advisor of the TZA Multifamily Portfolio I Mortgage Loan (seeExhibit 34.55) 

34.66       Wells Fargo Bank, NationalAssociation, as Primary Servicer of the 237 Park Avenue Mortgage Loan (seeExhibit 34.1) 

34.67       Wells Fargo Bank, NationalAssociation, as Special Servicer of the 237 Park Avenue Mortgage Loan (seeExhibit 34.1) 

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

34.69       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the 237 Park Avenue Mortgage Loan(see Exhibit 34.5) 

34.70       Wells Fargo Bank, NationalAssociation, as Custodian of the 237 Park Avenue Mortgage Loan (see Exhibit34.6) 

34.71       Park Bridge Lender ServicesLLC, as Operating Advisor of the 237 Park Avenue Mortgage Loan (see Exhibit34.55) 

34.72       CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of the 237 Park AvenueMortgage Loan (see Exhibit 34.8) 

34.73       National Tax Search, LLC, asServicing Function Participant of the 237 Park Avenue Mortgage Loan (seeExhibit 34.9) 

34.74       KeyBank National Association, as Primary Servicer of the JWMarriott Chicago Mortgage Loan (Omitted. See Explanatory Notes.)

34.75       Rialto Capital Advisors, LLC,as Special Servicer of the JW Marriott Chicago Mortgage Loan (see Exhibit 34.2)

34.76       Wells Fargo Bank, National Association, as Trustee of the JWMarriott Chicago Mortgage Loan (Omitted. See Explanatory Notes.)

34.77       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the JW Marriott Chicago MortgageLoan (see Exhibit 34.5) 

34.78       Wells Fargo Bank, NationalAssociation, as Custodian of the JW Marriott Chicago Mortgage Loan (see Exhibit34.6) 

34.79       Pentalpha Surveillance LLC,as Operating Advisor of the JW Marriott Chicago Mortgage Loan (see Exhibit34.7) 

34.80       Midland Loan Services, aDivision of PNC Bank, National Association, as Primary Servicer of the 50Varick Street Mortgage Loan (see Exhibit 34.56) 

34.81       Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the 50Varick Street Mortgage Loan (see Exhibit 34.56) 

34.82       Wells Fargo Bank, NationalAssociation, as Trustee and Certificate Administrator of the 50 Varick StreetMortgage Loan (see Exhibit 34.5) 

34.83       Wells Fargo Bank, NationalAssociation, as Custodian of the 50 Varick Street Mortgage Loan (see Exhibit34.6) 

34.84       Park Bridge Lender ServicesLLC, as Operating Advisor of the 50 Varick Street Mortgage Loan (see Exhibit34.55) 

34.85       Wells Fargo Bank, NationalAssociation, as Primary Servicer of the Macedonia Commons Mortgage Loan (seeExhibit 34.1) 

34.86       LNR Partners, LLC, as Special Servicer of the Macedonia CommonsMortgage Loan (Omitted. See Explanatory Notes.)

34.87       Wilmington Trust, National Association, as Trustee of theMacedonia Commons Mortgage Loan (Omitted. See Explanatory Notes.)

34.88       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the Macedonia Commons MortgageLoan (see Exhibit 34.5) 

34.89       Wells Fargo Bank, NationalAssociation, as Custodian of the Macedonia Commons Mortgage Loan (see Exhibit34.6) 

34.90       Trimont Real EstateAdvisors, LLC, as Operating Advisor of the Macedonia Commons Mortgage Loan (seeExhibit 34.47) 

34.91       CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of the MacedoniaCommons Mortgage Loan (see Exhibit 34.8) 

34.92       National Tax Search, LLC, as ServicingFunction Participant of the Macedonia Commons Mortgage Loan (see Exhibit 34.9) 

35          Servicer compliance statements.

35.1        Wells Fargo Bank,National Association, as Master Servicer

35.2        Rialto CapitalAdvisors, LLC, as Special Servicer

35.3        AEGON USA Realty Advisors, LLC, as Special Servicer ofthe Fairmount at Brewerytown Mortgage Loan (Omitted. See Explanatory Notes.)

35.4        Wells Fargo Bank,National Association, as Certificate Administrator

35.5        Wells Fargo Bank,National Association, as Primary Servicer of The District Mortgage Loan (seeExhibit 35.1) 

35.6        Rialto CapitalAdvisors, LLC, as Special Servicer of The District Mortgage Loan (see Exhibit35.2) 

35.7        Wells Fargo Bank,National Association, as Certificate Administrator of The District MortgageLoan (see Exhibit 35.4) 

35.8        Wells Fargo Bank,National Association, as Primary Servicer of the Medirian Sunrise VillageMortgage Loan (see Exhibit 35.1) 

35.9        Rialto CapitalAdvisors, LLC, as Special Servicer of the Medirian Sunrise Village MortgageLoan (see Exhibit 35.2) 

35.10       Wells Fargo Bank, National Association,as Certificate Administrator of the Medirian Sunrise Village Mortgage Loan (seeExhibit 35.4) 

35.11       Wells Fargo Bank, NationalAssociation, as Primary Servicer of the Bank of America Office Campus Building600 Mortgage Loan (see Exhibit 35.1) 

35.12       Rialto Capital Advisors, LLC,as Special Servicer of the Bank of America Office Campus Building 600 MortgageLoan (see Exhibit 35.2) 

35.13       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the Bank of America Office CampusBuilding 600 Mortgage Loan (see Exhibit 35.4) 

35.14       Wells Fargo Bank, NationalAssociation, as Primary Servicer of the DoubleTree Berkeley Marina MortgageLoan (see Exhibit 35.1) 

35.15       Rialto Capital Advisors, LLC,as Special Servicer of the DoubleTree Berkeley Marina Mortgage Loan (seeExhibit 35.2) 

35.16       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the DoubleTree Berkeley MarinaMortgage Loan (see Exhibit 35.4) 

35.17       Wells Fargo Bank, National Association,as Primary Servicer of the 245 Park Avenue Mortgage Loan

35.18       AEGON USA Realty Advisors, LLC, as Special Servicer of the 245Park Avenue Mortgage Loan (Omitted. See Explanatory Notes.)

35.19       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the 245 Park Avenue Mortgage Loan(see Exhibit 35.4) 

35.20       KeyBank National Association, as Primary Servicer of the DelAmo Fashion Center Mortgage Loan (Omitted. See Explanatory Notes.)

35.21       Cohen Financial, a Division of SunTrust Bank, as SpecialServicer of the Del Amo Fashion Center Mortgage Loan (Omitted. See ExplanatoryNotes.)

35.22       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the Del Amo Fashion CenterMortgage Loan (see Exhibit 35.4) 

35.23       Midland Loan Services, a Division of PNC Bank, NationalAssociation, as Primary Servicer of the Park West Village Mortgage Loan(Omitted. See Explanatory Notes.)

35.24       Midland Loan Services, a Division of PNC Bank, NationalAssociation, as Special Servicer of the Park West Village Mortgage Loan(Omitted. See Explanatory Notes.)

35.25       Wells Fargo Bank, National Association,as Certificate Administrator of the Park West Village Mortgage Loan (seeExhibit 35.4) 

35.26       Midland Loan Services, a Division of PNC Bank, NationalAssociation, as Primary Servicer of the TZA Multifamily Portfolio I MortgageLoan (Omitted. See Explanatory Notes.)

35.27       Midland Loan Services, a Division of PNC Bank, NationalAssociation, as Special Servicer of the TZA Multifamily Portfolio I MortgageLoan (Omitted. See Explanatory Notes.)

35.28       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the TZA Multifamily Portfolio IMortgage Loan (see Exhibit 35.4) 

35.29       Wells Fargo Bank, NationalAssociation, as Primary Servicer of the 237 Park Avenue Mortgage Loan

35.30       Wells Fargo Bank, NationalAssociation, as Special Servicer of the 237 Park Avenue Mortgage Loan

35.31       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the 237 Park Avenue Mortgage Loan(see Exhibit 35.4) 

35.32       KeyBank National Association, as Primary Servicer of the JWMarriott Chicago Mortgage Loan (Omitted. See Explanatory Notes.)

35.33       Rialto Capital Advisors,LLC, as Special Servicer of the JW Marriott Chicago Mortgage Loan

35.34       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the JW Marriott Chicago MortgageLoan (see Exhibit 35.4)

35.35       Midland Loan Services, a Division of PNC Bank, NationalAssociation, as Primary Servicer of the 50 Varick Street Mortgage Loan(Omitted. See Explanatory Notes.)

35.36       Midland Loan Services, a Division of PNC Bank, NationalAssociation, as Special Servicer of the 50 Varick Street Mortgage Loan(Omitted. See Explanatory Notes.)

35.37       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the 50 Varick Street Mortgage Loan(see Exhibit 35.4) 

35.38       Wells Fargo Bank, NationalAssociation, as Primary Servicer of the Macedonia Commons Mortgage Loan

35.39       LNR Partners, LLC, as Special Servicer of the Macedonia CommonsMortgage Loan (Omitted. See Explanatory Notes.)

35.40       Wells Fargo Bank, NationalAssociation, as Certificate Administrator of the Macedonia Commons Mortgage Loan(see Exhibit 35.4) 

99.1        MortgageLoan Purchase Agreement, dated as of September 29, 2017, between UBS AG, by andthrough its branch office at 1285 Avenue of the Americas, New York, New Yorkand UBS Commercial Mortgage Securitization Corp. (filed as Exhibit 99.1 to theregistrant’s Current Report on Form 8-K filed on October 18, 2017 underCommission File No. 333-207340-04 and incorporated by reference herein)

99.2        MortgageLoan Purchase Agreement, dated as of September 29, 2017, between SociétéGénérale and UBS Commercial Mortgage Securitization Corp. (filed as Exhibit99.2 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)

99.3        MortgageLoan Purchase Agreement, dated as of September 29, 2017, between Ladder CapitalFinance LLC, Ladder Capital Finance Holdings LLLP, Series REIT of LadderCapital Finance Holdings LLLP, Series TRS of Ladder Capital Finance HoldingsLLLP and UBS Commercial Mortgage Securitization Corp. (filed as Exhibit 99.3 tothe registrant’s Current Report on Form 8-K filed on October 18, 2017 underCommission File No. 333-207340-04 and incorporated by reference herein)

99.4        MortgageLoan Purchase Agreement, dated as of September 29, 2017, between RialtoMortgage Finance, LLC and UBS Commercial Mortgage Securitization Corp. (filedas Exhibit 99.4 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)

99.5        MortgageLoan Purchase Agreement, dated as of September 29, 2017, between CIBC Inc. andUBS Commercial Mortgage Securitization Corp. (filed as Exhibit 99.5 to theregistrant’s Current Report on Form 8-K filed on October 18, 2017 underCommission File No. 333-207340-04 and incorporated by reference herein)

99.6        MortgageLoan Purchase Agreement, dated as of September 29, 2017, between Natixis RealEstate Capital LLC and UBS Commercial Mortgage Securitization Corp. (filed asExhibit 99.6 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)

(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 theSecurities Exchange Act of 1934, the registrant has duly caused this report tobe signed on its behalf by the undersigned, thereunto duly authorized.

UBS Commercial MortgageSecuritization Corp.(Depositor)

/s/Nicholas Galeone

NicholasGaleone, President

(senior officer in charge of securitizationof the depositor)

Date: March 22, 2019

/s/ DavidSchell

DavidSchell, Managing Director

Date: March 22, 2019