**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: 333-199921-03**

**Central Index Key Number of the issuing entity:0001647980**

**CSAIL 2015-C3 Commercial MortgageTrust**

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

** **

**Central Index Key Number of the depositor: 0000802106**

**Credit Suisse First Boston MortgageSecurities Corp.**

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

** **

**Central Index Key Number of the sponsor: 0001628601**

**Column Financial, Inc.**

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

** **

**Central Index Key Number of the sponsor: 0001541886**

**UBS Real Estate Securities Inc.**

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

** **

**Central Index Key Number of the sponsor: 0001497973**

**The Bank of New York Mellon**

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

** **

**Central Index Key Number of the sponsor: 0001632269**

**Benefit Street Partners CRE FinanceLLC**

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

** **

**Central Index Key Number of the sponsor: 0001505494**

**The Bancorp Bank**

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

** **

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

**the issuing entity)** | **38-3976110**

**38-3976111**

**38-7143593**

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

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

**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) 272-6858**

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 toSection 12(g) of the Act:  None.

Indicate by check mark if theregistrant is a well-known seasoned issuer, as defined in Rule 405 of theSecurities 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 ifa 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 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 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 Charles River Plaza North Mortgage Loan,The Mall of New Hampshire Mortgage Loan, the Arizona Grand Resort & SpaMortgage Loan and the Cape May Hotels Mortgage Loan, which constitutedapproximately 9.2%, 7.0%, 3.5% and 1.1%, 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 theCharles River Plaza North Mortgage Loan, three other *pari passu* loansand one subordinate companion loan, each of which are not assets of the issuingentity, (b) with respect to The Mall of New Hampshire Mortgage Loan, one other *paripassu* loan, which is not an asset of the issuing entity, (c) with respectto the Arizona Grand Resort & Spa Mortgage Loan, one other *pari passu*loan, which is not an asset of the issuing entity and (d) with respect to theCape May Hotels Mortgage Loan, one other *pari passu* loan, which is notan asset of the issuing entity. These loan combinations, including the CharlesRiver Plaza North Mortgage Loan, The Mall of New Hampshire Mortgage Loan, theArizona Grand Resort & Spa Mortgage Loan and the Cape May Hotels MortgageLoan, 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 Starwood Capital Extended Stay Portfolio MortgageLoan, previously an asset of the issuing entity being serviced under thePooling and Servicing Agreement, was not an asset of the issuing entity duringthe reporting period and is omitted from this Annual Report on Form 10-K andwill be omitted from subsequent Annual Reports on Form 10-K.

The Exhibit Index describesexhibits provided by certain parties (in their capacities indicated on theExhibit Index) with respect to the Soho-Tribeca Grand Hotel Portfolio MortgageLoan and the Westfield Trumbull Mortgage Loan, which constituted approximately3.5% and 2.9%, respectively, of the asset pool of the issuing entity as of itscut-off date.  The Soho-Tribeca Grand Hotel Portfolio Mortgage Loan andthe Westfield Trumbull Mortgage Loan are each an asset of the issuing entityand are each part of a loan combination that includes (a) with respect to theSoho-Tribeca Grand Hotel Portfolio Mortgage Loan, two other *pari passu*loans and one subordinate companion loan, which are not assets of the issuingentity or (b) with respect to the Westfield Trumbull Mortgage Loan, two other *paripassu* loans, which are not assets of the issuing entity. A *pari passu*portion of each loan combination was securitized in the CSAIL 2015-C1Commercial Mortgage Trust transaction, Commission File Number 333-199921-01(the “CSAIL 2015-C1 Transaction”). These loan combinations, includingthe Soho-Tribeca Grand Hotel Portfolio Mortgage Loan and the Westfield TrumbullMortgage Loan, are being serviced and administered pursuant to the pooling andservicing agreement for the CSAIL 2015-C1 Transaction, which is incorporated byreference as 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 Westfield Wheaton Mortgage Loan and theSterling & Milagro Apartments Mortgage Loan, which constitutedapproximately 6.8% and 1.2%, respectively, of the asset pool of the issuingentity as of its cut-off date.  The Westfield Wheaton Mortgage Loan andthe Sterling & Milagro Apartments Mortgage Loan are each an asset of theissuing entity and are each part of a loan combination that includes (a) withrespect to the Westfield Wheaton Mortgage Loan, two other *pari passu*loans, which are not assets of the issuing entity or (b) with respect to theSterling & Milagro Apartments Mortgage Loan, one other *pari passu*loan, which is not an asset of the issuing entity. A *pari passu* portionof each loan combination was securitized in the CSAIL 2015-C2 CommercialMortgage Trust transaction, Commission File Number 333-199921-02 (the “CSAIL2015-C2 Transaction”). These loan combinations, including the WestfieldWheaton Mortgage Loan and the Sterling & Milagro Apartments Mortgage Loan,are being serviced and administered pursuant to the pooling and servicingagreement for the CSAIL 2015-C2 Transaction, which is incorporated by referenceas 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 WPC Department Store Portfolio MortgageLoan, which constituted approximately 1.2% of the asset pool of the issuing entityas of its cut-off date.  The WPC Department Store Portfolio Mortgage Loanis an asset of the issuing entity and is part of a loan combination thatincludes the WPC Department Store Portfolio Mortgage Loan and two other *paripassu* loans, which are not assets of the issuing entity.  This loancombination, including the WPC Department Store Portfolio Mortgage Loan, wasserviced under the Pooling and Servicing Agreement for the issuing entity priorto the closing of the securitization of a *pari passu* portion of the WPCDepartment Store Portfolio loan combination in the Bank of America MerrillLynch Commercial Mortgage Trust 2015-UBS7 transaction, Commission File Number333-201743-01 (the “BAMLCM 2015-UBS7 Transaction”).  After theclosing of the BAMLCM 2015-UBS7 Transaction on September 24, 2015, this loancombination, including the WPC Department Store Portfolio Mortgage Loan was,and will continue to be, serviced and administered pursuant to the pooling andservicing agreement with respect to the BAMLCM 2015-UBS7 Transaction, which isincorporated by reference as Exhibit 4.4 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.

Midland Loan Services, a Divisionof PNC Bank, National Association is the master servicer of the mortgage loansserviced under the Pooling and Servicing Agreement and the primary servicer ofthe WPC Department Store Portfolio Mortgage Loan. As a result, Midland LoanServices, a Division of PNC Bank, National Association is a “servicer” asdefined in Item 1108(a)(2)(iii) of Regulation AB, in the capacities describedabove, because it is servicing mortgage loans that constituted 10% or more ofthe assets 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 Midland Loan Services, aDivision of PNC Bank, National Association in the capacities described aboveare listed in the Exhibit Index.

Rialto Capital Advisors, LLC is thespecial servicer of the mortgage loans serviced under the Pooling and ServicingAgreement, the Westfield Wheaton Mortgage Loan and the Sterling & MilagroApartments Mortgage Loan. As a result, Rialto Capital Advisors, LLC 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 Rialto Capital Advisors, LLC in the capacities described above are listed inthe Exhibit Index.

Wells Fargo Bank, NationalAssociation is the certificate administrator of the mortgage loans servicedunder the Pooling and Servicing Agreement and the primary servicer of theWestfield Wheaton Mortgage Loan and the Sterling & Milagro ApartmentsMortgage Loan. As a result, Wells Fargo Bank, National Association is a “servicer”as defined in Item 1108(a)(2)(iii) of Regulation AB, in the capacitiesdescribed above, because it is servicing mortgage loans that constituted 10% ormore of the assets of the issuing entity as of its cut-off date. Theassessments of compliance with applicable servicing criteria, accountants’attestation reports and servicer compliance statements delivered by Wells FargoBank, National Association in the capacities described above are listed in theExhibit Index.

Wells Fargo Bank, National Association is the custodian ofthe mortgage loans serviced under the Pooling and Servicing Agreement, theWestfield Wheaton Mortgage Loan, the Soho-Tribeca Grand Hotel PortfolioMortgage Loan, the Westfield Trumbull Mortgage Loan and the Sterling &Milagro Apartments Mortgage Loan.  As a result, Wells Fargo Bank, NationalAssociation 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 Wells Fargo Bank, National Association in the capacitiesdescribed above are listed in the Exhibit Index.

Pentalpha Surveillance LLC is the operating advisor of themortgage loans serviced under the Pooling and Servicing Agreement and the trustadvisor of the WPC Department Store Portfolio Mortgage Loan.  As a result,Pentalpha Surveillance LLC is a servicing function participant in thecapacities described above, because it is servicing mortgage loans thatconstituted 5% or more of the assets of the issuing entity as of its cut-offdate. The assessments of compliance with applicable servicing criteria andaccountants’ attestation reports delivered by Pentalpha Surveillance LLC in thecapacities described above are listed in the Exhibit Index.

Park Bridge Lender Services LLC is the operating advisor ofthe Westfield Wheaton Mortgage Loan, the Soho-Tribeca Grand Hotel PortfolioMortgage Loan, the Westfield Trumbull Mortgage Loan and the Sterling &Milagro Apartments 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 capacities describedabove are listed in the Exhibit Index.

KeyBankNational Association is the primary servicer of the Westfield Trumbull MortgageLoan and the Soho-Tribeca Grand Hotel Portfolio Mortgage Loan.  Thesemortgage loans constitute more than 5%, but less than 10%, of the pool assetsof the issuing entity.  Therefore, the Depositor included in this AnnualReport on Form 10-K an assessment of compliance with applicable servicingcriteria for KeyBank National Association and an accountants’ attestation reportpursuant to Item 1122 of Regulation AB because KeyBank 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 KeyBank NationalAssociation because KeyBank National Association is an unaffiliated servicerservicing less than 10% of pool assets.

GreystoneServicing Company LLC is the special servicer of the Soho-Tribeca Grand HotelPortfolio Mortgage Loan and Greystone Servicing Company LLC (as successor toC-III Asset Management LLC) is the special servicer of the Westfield TrumbullMortgage Loan, which constituted approximately 3.5% and 2.9%,respectively, of the asset pool of the issuing entity as of its cut-off date.In accordance with the Compliance and Disclosure Interpretations, Section200.03 (Rules 13a-18 and 15d-18, Servicer’s Assessment of Compliance), thispercentage must be reduced *pro rata*because it was only acting asspecial servicer of the Soho-Tribeca Grand Hotel Portfolio Mortgage Loan fromAugust 6, 2021 to December 31, 2021. As a result, it falls below the *deminimis*requirements in Item 1122 of Regulation AB and no such assessmentor attestation is required.

Situs Holdings, LLC is the specialservicer of the Charles River Plaza North Mortgage Loan and the Soho-Tribeca Grand Hotel Portfolio Mortgage Loan,which constituted approximately 9.2% and 3.5%, respectively, of the asset poolof the issuing entity as of its cut-off date. In accordance with the Complianceand Disclosure Interpretations, Section 200.03 (Rules 13a-18 and 15d-18,Servicer’s Assessment of Compliance), this percentage must be reduced *prorata*because it was only acting as special servicer of the Charles RiverPlaza North Mortgage Loan from August 6, 2021 to December 31, 2021 and the Soho-Tribeca Grand Hotel Portfolio Mortgage Loanfrom January 1, 2021 to August 5, 2021. As a result, Situs Holdings, LLC is anunaffiliated party that, as a result of such *pro rata* reduction of suchpercentage, is not a “servicer” that meets the criteria in Item 1108(a)(2)(i)through (iii) of Regulation AB and so no servicer compliance statement isrequired.

Wells Fargo Bank, NationalAssociation acts as trustee of the Charles River Plaza North Mortgage Loan, TheMall of New Hampshire Mortgage Loan, the Arizona Grand Resort & SpaMortgage Loan, the Cape May Hotels Mortgage Loan, the Soho-Tribeca Grand HotelPortfolio Mortgage Loan and the Westfield Trumbull Mortgage Loan. Pursuant to the Pooling and Servicing Agreement and the pooling and servicingagreement for the CSAIL 2015-C1 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 Item1122(d)(2)(iii) of Regulation AB, and each such party included Item1122(d)(2)(iii) of Regulation AB in the assessment of compliance withapplicable 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 Charles River Plaza NorthMortgage Loan, The Mall of New Hampshire Mortgage Loan, the Arizona GrandResort & Spa Mortgage Loan, the Cape May Hotels Mortgage Loan, theSoho-Tribeca Grand Hotel Portfolio Mortgage Loan and the Westfield TrumbullMortgage 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 Westfield Wheaton Mortgage Loan and theSterling & Milagro Apartments Mortgage Loan.  Pursuant to the poolingand servicing agreement for the CSAIL 2015-C2 Transaction, the trustee isrequired to provide an assessment of compliance with applicable servicingcriteria solely with respect to Item 1122(d)(2)(iii) of Regulation AB(regarding advances of funds or guarantees regarding collections, cash flows ordistributions, and any interest or other fees charged for such advances, aremade, reviewed and approved as specified in the transaction agreements).However, during the reporting period, the trustee did not perform any servicingfunction 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 Westfield Wheaton Mortgage Loanand the Sterling & Milagro Apartments Mortgage Loan have delivered one ormore assessments of compliance with respect to Item 1122(d)(2)(iii) ofRegulation AB.

U.S. Bank National Associationacts as trustee of the WPC Department Store Portfolio Mortgage Loan. Pursuant to the pooling and servicing agreement for the BAMLCM 2015-UBS7Transaction, 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 criteria specifiedin Item 1122(d)(2)(iii) of Regulation AB.  The master servicer or thespecial servicer, to the extent required, performed the servicing functionidentified with respect to Item 1122(d)(2)(iii) of Regulation AB, and each suchparty included Item 1122(d)(2)(iii) of Regulation AB in the assessment ofcompliance with applicable servicing criteria and accountant’s attestationreport for the subject transaction.  As a result, this Annual Report onForm 10-K does not include an assessment of compliance with applicableservicing criteria of the trustee. One or more other servicers of the WPCDepartment Store Portfolio Mortgage Loan have delivered one or more assessmentsof compliance 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 Solutions, LLC.  Thisentity was engaged by the primary servicer of the Westfield Wheaton MortgageLoan and the Sterling & Milagro Apartments Mortgage Loan to remit taxpayments 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 party isa “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 Soho-Tribeca Grand Hotel Portfolio Mortgage Loan, theWestfield Trumbull Mortgage Loan, the Westfield Wheaton Mortgage Loan, theSterling & Milagro Apartments Mortgage Loan and the WPC Department Store PortfolioMortgage 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.

Withrespect to the *pari passu* loan combinations that include theCharles River Plaza North Mortgage Loan, the Soho-Tribeca Grand Hotel PortfolioMortgage Loan, the Westfield Trumbull Mortgage Loan and the WPC DepartmentStore Portfolio Mortgage Loan, (i) the reports on assessment ofcompliance with servicing criteria and attestation reports on assessment ofcompliance with servicing criteria of LNR Partners, LLC as special servicer ofthe WPC Department Store Portfolio Mortgage Loan and U.S. Bank NationalAssociation as custodian of the WPC Department Store Portfolio Mortgage Loan,listed on the Exhibit Index are omitted from this Annual Report on Form 10-K asthey are not required to be included on this Annual Report on Form 10-K perInstruction 3 to Item 1122 of Regulation AB because they are parties performingactivities that address servicing criteria relating to 5% or less of the assetsof the issuing entity, and the report on assessment of compliance withservicing criteria and attestation report on assessment of compliance withservicing criteria of Greystone Servicing Company LLCas special servicer of the Soho-Tribeca Grand Hotel Portfolio Mortgage Loan onand after August 6, 2021 and Greystone Servicing Company LLC (as successor toC-III Asset Management LLC) as special servicer of the Westfield TrumbullMortgage Loan listed on the Exhibit Index are omitted from this AnnualReport on Form 10-K for the reasons set forth in the Explanatory Notes above;and (ii) the servicer compliance statements of KeyBank National Association asprimary servicer of the Soho-Tribeca Grand Hotel Portfolio Mortgage Loan andthe Westfield Trumbull Mortgage Loan, AEGON USARealty Advisors, as special servicer of the Charles River Plaza North MortgageLoan prior to August 6, 2021, GreystoneServicing Company LLC as special servicer of the Soho-Tribeca Grand HotelPortfolio Mortgage Loan on and after August 6, 2021 and Greystone ServicingCompany LLC (as successor to C-III Asset Management LLC) as special servicer ofthe Westfield Trumbull Mortgage Loan and LNR Partners, LLC as specialservicer of the WPC Department Store Portfolio Mortgage Loan, listed on theExhibit Index are omitted from this Annual Report on Form 10-K as they are notrequired by Item 1123 of Regulation AB to be included on this Annual Report onForm 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) of Regulation AB,and the servicer compliance statement of Situs Holdings, LLC as specialservicer of the Charles River Plaza North Mortgage Loan on and after August 6,2021 and the Soho-Tribeca Grand Hotel Portfolio Mortgage Loan prior to August6, 2021 listed on the Exhibit Index is omitted from this Annual Report on From10-K for the reasons set forth in the Explanatory Notes above.

**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, RelatedStockholder 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, and U.S. Bank NationalAssociation as trustee, as certificate administrator and as custodian.

In December 2014, Phoenix Light SF Limited and certainrelated entities and the National Credit Union Administration (NCUA) filedcomplaints in the United States District Court for the Southern District of NewYork against Wells Fargo Bank, alleging claims against Wells Fargo Bank in itscapacity as trustee for a number of residential mortgage-backed securitiestrusts. Complaints raising similar allegations have been filed by CommerzbankAG in the Southern District of New York and by IKB International and IKBDeutsche Industriebank in New York state court. In each case, the plaintiffs allegethat Wells Fargo Bank, as trustee, caused losses to investors, and plaintiffsassert causes of action based upon, among other things, the trustee’s allegedfailure to notify and enforce repurchase obligations of mortgage loan sellersfor purported breaches of representations and warranties, notify investors ofalleged events of default, and abide by appropriate standards of care followingalleged events of default. Wells Fargo Bank previously settled two class actionlawsuits with similar allegations that were filed in November 2014 and December2016 by institutional investors in the Southern District of New York and NewYork state court, respectively. In addition, Park Royal I LLC and Park Royal IILLC have filed complaints in New York state court alleging Wells Fargo Bank,N.A., as trustee, failed to take appropriate actions upon learning of defectivemortgage loan documentation. In March 2021, the Company entered into anagreement to resolve the case filed by the NCUA.

In addition to the foregoing cases, in August 2014 and August2015 Nomura Credit & Capital Inc. (“Nomura”) and Natixis Real EstateHoldings, LLC (“Natixis”) filed a total of seven third-party complaintsagainst Wells Fargo Bank in New York state court. In the underlying first-partyactions, Nomura and Natixis have been sued for alleged breaches ofrepresentations 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, andfailed to adhere to accepted servicing practices. Natixis additionally allegesthat Wells Fargo Bank failed to perform default oversight duties. Wells FargoBank has asserted counterclaims alleging that Nomura and Natixis failed toprovide Wells 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.

 

U.S. Bank National Association (“U.S. Bank”) and other largefinancial institutions have been sued in their capacity as trustee or successortrustee for certain residential mortgage backed securities ("RMBS")trusts.  The complaints, primarily filed by investors or investor groupsagainst U.S. Bank and similar institutions, allege the trustees caused lossesto investors as a result of alleged failures by the sponsors, mortgage loansellers and servicers to comply with the governing agreements for these RMBStrusts.  Plaintiffs generally assert causes of action based upon thetrustees’ purported failures to enforce repurchase obligations of mortgage loansellers for alleged breaches of representations and warranties, notifysecurityholders of purported events of default allegedly caused by breaches ofservicing standards by mortgage loan servicers and abide by a heightenedstandard of care following alleged events of default.  

 

U.S. Bank denies liability and believes that it hasperformed its obligations under the RMBS trusts in good faith, that its actionswere not the cause of losses to investors, that it has meritorious defenses,and it has contested and intends to continue contesting the plaintiffs’ claimsvigorously.  However, U.S. Bank cannot assure you as to the outcome of anyof the litigation, or the possible impact of these litigations on the trusteeor the RMBS trusts.  

 

On March 9, 2018, a law firm purporting to represent fifteenDelaware statutory trusts (the “DSTs”) that issued securities backed by studentloans (the “Student Loans”) filed a lawsuit in the Delaware Court of Chanceryagainst U.S. Bank National Association (“U.S. Bank”) in its capacities asindenture trustee and successor special servicer, and three other institutionsin their respective transaction capacities, with respect to the DSTs and theStudent Loans.  This lawsuit is captioned *The National CollegiateStudent Loan Master Trust I, et al. v. U.S. Bank National Association, et al.*,C.A. No. 2018-0167-JRS (Del. Ch.) (the “NCMSLT Action”).  The complaint,as amended on June 15, 2018, alleged that the DSTs have been harmed as a resultof purported misconduct or omissions by the defendants concerningadministration of the trusts and special servicing of the Student Loans. Since the filing of the NCMSLT Action, certain Student Loan borrowers have madeassertions against U.S. Bank concerning special servicing that appear to bebased on certain allegations made on behalf of the DSTs in the NCMSLT Action.

 

U.S. Bank has filed a motion seeking dismissal of theoperative complaint in its entirety with prejudice pursuant to Chancery CourtRules 12(b)(1) and 12(b)(6) or, in the alternative, a stay of the case whileother prior filed disputes involving the DSTs and the Student Loans arelitigated.  On November 7, 2018, the Court ruled that the case should bestayed in its entirety pending resolution of the first-filed cases.  OnJanuary 21, 2020, the Court entered an order consolidating for pretrial purposesthe NCMSLT Action and three other lawsuits pending in the Delaware Court ofChancery concerning the DSTs and the Student Loans, which remainspending.  

 

U.S. Bank denies liability in the NCMSLT Action and believesit has performed its obligations as indenture trustee and special servicer ingood faith and in compliance in all material respects with the terms of theagreements governing the DSTs and that it has meritorious defenses.  Ithas contested and intends to continue contesting the plaintiffs’ claimsvigorously.

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

The information regarding this Item has been previouslyprovided in a prospectus supplement of the Registrant relating to the issuingentity filed on August 18, 2015 pursuant to Rule 424(b)(5).

**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 Oto 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 Soho-Tribeca Grand HotelPortfolio Mortgage Loan and the Westfield Trumbull Mortgage Loan, which arebeing serviced and administered pursuant to the pooling and servicing agreementfor the CSAIL 2015-C1 Transaction, are attached hereto under Item 15 to thisAnnual Report on Form 10-K. Attached as Exhibit O to the pooling and servicingagreement for the CSAIL 2015-C1 Transaction incorporated by reference asExhibit 4.2 to this Annual Report on Form 10-K is a chart identifying theentities participating in a servicing function for the CSAIL 2015-C1Transaction 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 Westfield Wheaton Mortgage Loanand the Sterling & Milagro Apartments Mortgage Loan, which are beingserviced and administered pursuant to the pooling and servicing agreement forthe CSAIL 2015-C2 Transaction, are attached hereto under Item 15 to this AnnualReport on Form 10-K. Attached as Exhibit O to the pooling and servicing agreementfor the CSAIL 2015-C2 Transaction incorporated by reference as Exhibit 4.3 tothis Annual Report on Form 10-K is a chart identifying the entitiesparticipating in a servicing function for the CSAIL 2015-C2 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 WPC Department Store Portfolio MortgageLoan, which is being serviced and administered pursuant to the pooling andservicing agreement for the BAMLCM 2015-UBS7 Transaction, are attached heretounder Item 15 to this Annual Report on Form 10-K. Attached as Schedule VIII tothe pooling and servicing agreement for the BAMLCM 2015-UBS7 Transactionincorporated by reference as Exhibit 4.4 to this Annual Report on Form 10-K isa chart identifying the entities participating in a servicing function for theBAMLCM 2015-UBS7 Transaction responsible for each applicable servicing criteriaset forth in Item 1122(d).

The report on assessment of compliance for the twelve monthsended December 31, 2021, furnished pursuant to Item 1122 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.

**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 the businessline.

 

**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 August 1,2015, by and among Credit Suisse First Boston Mortgage Securities Corp., as Depositor,Midland Loan Services, a Division of PNC Bank, National Association, as MasterServicer, Rialto Capital Advisors, LLC, as Special Servicer, PentalphaSurveillance LLC, as Operating Advisor, Wells Fargo Bank, National Association,as Certificate Administrator and Wells Fargo Bank, National Association, asTrustee (filed as Exhibit 4.1 to the registrant’s Current Report on Form 8-K/Afiled on September 28, 2015 under Commission File No. 333-199921-03 andincorporated by reference herein).

4.2           Pooling and Servicing Agreement, dated as of March 1,2015, by and among Credit Suisse First Boston Mortgage Securities Corp., asDepositor, KeyBank National Association, as Master Servicer, C-III AssetManagement LLC, as Special Servicer, Park Bridge Lender Services LLC, asOperating Advisor, Wells Fargo Bank, National Association, as CertificateAdministrator and Wells Fargo Bank, National Association, as Trustee (filed asExhibit 4.2 to the registrant’s Current Report on Form 8-K filed on August 18,2015 under Commission File No. 333-199921-03 and incorporated by referenceherein).

4.3           Pooling and Servicing Agreement, dated as of May 1, 2015,by and among Credit Suisse First Boston Mortgage Securities Corp., asDepositor, Wells Fargo Bank, National Association, as Master Servicer, RialtoCapital Advisors, LLC, as Special Servicer, Park Bridge Lender Services LLC, asOperating Advisor, Wells Fargo Bank, National Association, as CertificateAdministrator and Wilmington Trust, National Association, as Trustee (filed asExhibit 4.3 to the registrant’s Current Report on Form 8-K filed on August 18,2015 under Commission File No. 333-199921-03 and incorporated by referenceherein).

4.4           Pooling and Servicing Agreement, dated as of September 1,2015, by and among Banc of America Merrill Lynch Commercial Mortgage Inc., asDepositor, Midland Loan Services, a Division of PNC Bank, National Association,as Master Servicer, LNR Partners, LLC, as Special Servicer, and PentalphaSurveillance LLC, as Trust Advisor and U.S. Bank National Association, asTrustee, Certificate Administrator, Certificate Registrar, Authenticating Agentand Custodian (filed as Exhibit 4.1 to the registrant’s Current Report on Form8-K/A filed on October 20, 2015 under Commission File No. 333-199921 -03 andincorporated by reference herein).

4.5           Amended and Restated Agreement Between Noteholders, datedas of September 15, 2015, by and between Wells Fargo Bank, NationalAssociation, not in its individual capacity but solely as Trustee, for thebenefit of the Holders of CSAIL 2015 C-3 Mortgage Trust Commercial MortgagePass-Through Certificates, as the Note A-1 Holder and Note A-2 Holder, UBS RealEstate Securities Inc., as the Note A-3-1 Holder and Note A-3-2 Holder, andPrima Mortgage Investment Trust, LLC as the Junior Noteholder (filed as Exhibit4.3 to the registrant’s Current Report on Form 8-K/A filed on September 28,2015 under Commission File No. 333-199921-03 and incorporated by referenceherein)

4.6           Co-Lender Agreement, dated as of August 18, 2015, by andbetween UBS Real Estate Securities Inc., as the Initial Note A-1 Holder andInitial Note A-2 Holder (filed as Exhibit 4.5 to the registrant’s CurrentReport on Form 8-K/A filed on September 28, 2015 under Commission File No.333-199921-03 and incorporated by reference herein)

4.7           Amended and Restated Co-Lender Agreement, dated as of May20, 2015, by and among Column Financial, Inc., as Initial Note Group 1-1Holder, Initial Note Group 1-2 Holder and Initial Note Group 2 Holder, andWells Fargo Bank, National Association, as Trustee for the Registered Holdersof CSAIL 2015-C1 Commercial Mortgage Trust, Commercial Mortgage Pass-ThroughCertificates, Series 2015-C1, as Note Group 3 Holder (filed as Exhibit 4.6 tothe registrant’s Current Report on Form 8-K/A filed on September 28, 2015 underCommission File No. 333-199921-03 and incorporated by reference herein)

4.8           Co-Lender Agreement, dated as of August 18, 2015, by andamong Column Financial, Inc., as Initial Note A-1 Holder and Initial Note A-2Holder (filed as Exhibit 4.7 to the registrant’s Current Report on Form 8-K/Afiled on September 28, 2015 under Commission File No. 333-199921-03 andincorporated by reference herein)

4.9         Agreement Between Noteholders, dated as of March 3, 2015,by and among Column Financial, Inc., as Initial Note A-1 Holder, Initial NoteA-2 Holder, Initial Note A-3 Holder and Initial Note B Holder (filed as Exhibit4.8 to the registrant’s Current Report on Form 8-K/A filed on September 28,2015 under Commission File No. 333-199921-03 and incorporated by referenceherein)

4.10         Co-Lender Agreement, dated as of March 20, 2015, by andamong Column Financial, Inc., as Initial Note Group 1 Holder, Initial NoteGroup 2 Holder and Initial Note Group 3 Holder (filed as Exhibit 4.9 to theregistrant’s Current Report on Form 8-K/A filed on September 28, 2015 underCommission File No. 333-199921-03 and incorporated by reference herein)

4.11         Co-Lender Agreement, dated as of August 18, 2015, by and betweenUBS Real Estate Securities Inc., as the Initial Note A-1 Holder, UBS RealEstate Securities Inc., as the Initial Note A-2 Holder, and UBS Real EstateSecurities Inc., as the Initial Note A-3 Holder (filed as Exhibit 4.10 to theregistrant’s Current Report on Form 8-K/A filed on September 28, 2015 underCommission File No. 333-199921-03 and incorporated by reference herein)

4.12         Co-Lender Agreement, dated as of May 20, 2015, by andamong Column Financial, Inc., as the Initial Note A-1 Holder and Initial NoteA-2 Holder (filed as Exhibit 4.11 to the registrant’s Current Report on Form8-K/A filed on September 28, 2015 under Commission File No. 333-199921-03 andincorporated by reference herein)

4.13         Co-Lender Agreement, dated as of August 18, 2015, by andbetween UBS Real Estate Securities Inc., as Initial Note A-1 Holder and InitialNote A-2 Holder (filed as Exhibit 4.12 to the registrant’s Current Report onForm 8-K/A filed on September 28, 2015 under Commission File No. 333-199921-03and incorporated by reference herein)

4.14         Co-Lender Agreement, dated as of August 18, 2015, by andamong Column Financial, Inc., as Initial Note A-1 Holder and Initial Note A-2Holder (filed as Exhibit 4.2 to the registrant’s Current Report on Form 8-K/Afiled on November 25, 2015 under Commission File No. 333-199921-03 andincorporated by reference herein)

 

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

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

33.1        Midland Loan Services, a Division of PNC Bank,National Association, as Master Servicer

33.2        Rialto Capital Advisors, LLC, as Special Servicer

33.3        Wells Fargo Bank, National Association, as Trusteeand Certificate Administrator

33.4        Wells Fargo Bank, National Association, asCustodian

33.5        Pentalpha Surveillance LLC, as Operating Advisor

33.6        Computershare Trust Company, National Association,as Servicing Function Participant for the Trustee and Certificate Administratoron and after November 1, 2021

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

33.8        Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of the Charles River Plaza NorthMortgage Loan (see Exhibit 33.1)

33.9        AEGON USA Realty Advisors, LLC, as Special Servicerof the Charles River Plaza North Mortgage Loan prior to August 6, 2021

33.10      Situs Holdings, LLC, as Special Servicer of theCharles River Plaza North Mortgage Loan on and after August 6, 2021

33.11      Wells Fargo Bank, National Association, as Trustee of the Charles River PlazaNorth Mortgage Loan (Omitted. See Explanatory Notes.)

33.12      Wells Fargo Bank, National Association, asCustodian of the Charles River Plaza North Mortgage Loan (see Exhibit 33.4)

33.13      Pentalpha Surveillance LLC, as Operating Advisor ofthe Charles River Plaza North Mortgage Loan (see Exhibit 33.5)

33.14      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.7)

33.15      Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of The Mall of New Hampshire MortgageLoan (see Exhibit 33.1)

33.16      Rialto Capital Advisors, LLC, as Special Servicerof The Mall of New Hampshire Mortgage Loan (see Exhibit 33.2)

33.17      Wells Fargo Bank, National Association, as Trustee of The Mall of New HampshireMortgage Loan (Omitted. See Explanatory Notes.)

33.18      Wells Fargo Bank, National Association, asCustodian of The Mall of New Hampshire Mortgage Loan (see Exhibit 33.4)

33.19      Pentalpha Surveillance LLC, as Operating Advisor ofThe Mall of New Hampshire Mortgage Loan (see Exhibit 33.5)

33.20      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.7)

33.21      Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of the Arizona Grand Resort & SpaMortgage Loan (see Exhibit 33.1)

33.22      Rialto Capital Advisors, LLC, as Special Servicerof the Arizona Grand Resort & Spa Mortgage Loan (see Exhibit 33.2)

33.23      Wells Fargo Bank, National Association, as Trustee of the Arizona Grand Resort& Spa Mortgage Loan (Omitted. See Explanatory Notes.)

33.24      Wells Fargo Bank, National Association, asCustodian of the Arizona Grand Resort & Spa Mortgage Loan (see Exhibit33.4)

33.25      Pentalpha Surveillance LLC, as Operating Advisor ofthe Arizona Grand Resort & Spa Mortgage Loan (see Exhibit 33.5)

33.26      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.7)

33.27      Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of the Cape May Hotels Mortgage Loan(see Exhibit 33.1)

33.28      Rialto Capital Advisors, LLC, as Special Servicerof the Cape May Hotels Mortgage Loan (see Exhibit 33.2)

33.29      Wells Fargo Bank, National Association, as Trustee of the Cape May HotelsMortgage Loan (Omitted. See Explanatory Notes.)

33.30      Wells Fargo Bank, National Association, asCustodian of the Cape May Hotels Mortgage Loan (see Exhibit 33.4)

33.31      Pentalpha Surveillance LLC, as Operating Advisor ofthe Cape May Hotels Mortgage Loan (see Exhibit 33.5)

33.32      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.7)

33.33      KeyBank National Association, as Primary Servicerof the Soho-Tribeca Grand Hotel Portfolio Mortgage Loan

33.34      Situs Holdings, LLC, as Special Servicer of theSoho-Tribeca Grand Hotel Portfolio Mortgage Loan prior to August 6, 2021 (SeeExhibit 33.10)

33.35      Greystone Servicing Company LLC, as Special Servicer of the Soho-Tribeca GrandHotel Portfolio Mortgage Loan on and after August 6, 2021 (Omitted. SeeExplanatory Notes.)

33.36      Wells Fargo Bank, National Association, as Trustee of the Soho-Tribeca GrandHotel Portfolio Mortgage Loan (Omitted. See Explanatory Notes.)

33.37      Wells Fargo Bank, National Association, asCustodian of the Soho-Tribeca Grand Hotel Portfolio Mortgage Loan (see Exhibit 33.4)

33.38      Park Bridge Lender Services LLC, as OperatingAdvisor of the Soho-Tribeca Grand Hotel Portfolio Mortgage Loan

33.39      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.7)

33.40      KeyBank National Association, as Primary Servicerof the Westfield Trumbull Mortgage Loan (see Exhibit 33.33)

33.41      Greystone Servicing Company LLC (as successor to C-III Asset Management LLC),as Special Servicer of the Westfield Trumbull Mortgage Loan (Omitted. SeeExplanatory Notes.)

33.42      Wells Fargo Bank, National Association, as Trustee of the Westfield TrumbullMortgage Loan (Omitted. See Explanatory Notes.)

33.43      Wells Fargo Bank, National Association, asCustodian of the Westfield Trumbull Mortgage Loan (see Exhibit 33.4)

33.44      Park Bridge Lender Services LLC, as OperatingAdvisor of the Westfield Trumbull Mortgage Loan (see Exhibit 33.38)

33.45      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.7)

33.46      Wells Fargo Bank, National Association, as PrimaryServicer of the Westfield Wheaton Mortgage Loan

33.47      Rialto Capital Advisors, LLC, as Special Servicerof the Westfield Wheaton Mortgage Loan (see Exhibit 33.2)

33.48      Wilmington Trust, National Association, as Trustee of the Westfield WheatonMortgage Loan (Omitted. See Explanatory Notes.)

33.49      Wells Fargo Bank, National Association, asCustodian of the Westfield Wheaton Mortgage Loan (see Exhibit 33.4)

33.50      Park Bridge Lender Services LLC, as OperatingAdvisor of the Westfield Wheaton Mortgage Loan (see Exhibit 33.38)

33.51      CoreLogic Solutions, LLC, as Servicing FunctionParticipant of the Westfield Wheaton Mortgage Loan

33.52      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.7)

33.53      Wells Fargo Bank, National Association, as PrimaryServicer of the Sterling & Milagro Apartments Mortgage Loan (see Exhibit33.46)

33.54      Rialto Capital Advisors, LLC, as Special Servicerof the Sterling & Milagro Apartments Mortgage Loan (see Exhibit 33.2)

33.55      Wilmington Trust, National Association, as Trustee of the Sterling &Milagro Apartments Mortgage Loan (Omitted. See Explanatory Notes.)

33.56      Wells Fargo Bank, National Association, asCustodian of the Sterling & Milagro Apartments Mortgage Loan (see Exhibit33.4)

33.57      Park Bridge Lender Services LLC, as OperatingAdvisor of the Sterling & Milagro Apartments Mortgage Loan (see Exhibit33.38)

33.58      CoreLogic Solutions, LLC, as Servicing FunctionParticipant of the Sterling & Milagro Apartments Mortgage Loan (see Exhibit33.51)

33.59      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 33.7)

33.60      Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of the WPC Department Store PortfolioMortgage Loan (see Exhibit 33.1)

33.61      LNR Partners, LLC, as Special Servicer of the WPC Department Store PortfolioMortgage Loan (Omitted. See Explanatory Notes.)

33.62      U.S. Bank National Association, as Trustee and Custodian of the WPC DepartmentStore Portfolio Mortgage Loan (Omitted. See Explanatory Notes.)

33.63      Pentalpha Surveillance LLC, as Trust Advisor of theWPC Department Store Portfolio Mortgage Loan (see Exhibit 33.5)

34           Attestation reports on assessment of compliance with servicing criteria forasset-backed securities.

34.1        Midland Loan Services, a Division of PNC Bank,National Association, as Master Servicer

34.2        Rialto Capital Advisors, LLC, as Special Servicer

34.3        Wells Fargo Bank, National Association, as Trusteeand Certificate Administrator

34.4        Wells Fargo Bank, National Association, asCustodian

34.5        Pentalpha Surveillance LLC, as Operating Advisor

34.6        Computershare Trust Company, National Association,as Servicing Function Participant for the Trustee and Certificate Administratoron and after November 1, 2021

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

34.8        Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of the Charles River Plaza NorthMortgage Loan (see Exhibit 34.1)

34.9        AEGON USA Realty Advisors, LLC, as Special Servicerof the Charles River Plaza North Mortgage Loan prior to August 6, 2021

34.10      Situs Holdings, LLC, as Special Servicer of theCharles River Plaza North Mortgage Loan on and after August 6, 2021

34.11      Wells Fargo Bank, National Association, as Trustee of the Charles River PlazaNorth Mortgage Loan (Omitted. See Explanatory Notes.)

34.12      Wells Fargo Bank, National Association, asCustodian of the Charles River Plaza North Mortgage Loan (see Exhibit 34.4)

34.13      Pentalpha Surveillance LLC, as Operating Advisor ofthe Charles River Plaza North Mortgage Loan (see Exhibit 34.5)

34.14      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.7)

34.15      Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of The Mall of New Hampshire MortgageLoan (see Exhibit 34.1)

34.16      Rialto Capital Advisors, LLC, as Special Servicerof The Mall of New Hampshire Mortgage Loan (see Exhibit 34.2)

34.17      Wells Fargo Bank, National Association, as Trustee of The Mall of New HampshireMortgage Loan (Omitted. See Explanatory Notes.)

34.18      Wells Fargo Bank, National Association, asCustodian of The Mall of New Hampshire Mortgage Loan (see Exhibit 34.4)

34.19      Pentalpha Surveillance LLC, as Operating Advisor ofThe Mall of New Hampshire Mortgage Loan (see Exhibit 34.5)

34.20      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.7)

34.21      Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of the Arizona Grand Resort & SpaMortgage Loan (see Exhibit 34.1)

34.22      Rialto Capital Advisors, LLC, as Special Servicerof the Arizona Grand Resort & Spa Mortgage Loan (see Exhibit 34.2)

34.23      Wells Fargo Bank, National Association, as Trustee of the Arizona Grand Resort& Spa Mortgage Loan (Omitted. See Explanatory Notes.)

34.24      Wells Fargo Bank, National Association, asCustodian of the Arizona Grand Resort & Spa Mortgage Loan (see Exhibit34.4)

34.25      Pentalpha Surveillance LLC, as Operating Advisor ofthe Arizona Grand Resort & Spa Mortgage Loan (see Exhibit 34.5)

34.26      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.7)

34.27      Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of the Cape May Hotels Mortgage Loan(see Exhibit 34.1)

34.28      Rialto Capital Advisors, LLC, as Special Servicerof the Cape May Hotels Mortgage Loan (see Exhibit 34.2)

34.29      Wells Fargo Bank, National Association, as Trustee of the Cape May HotelsMortgage Loan (Omitted. See Explanatory Notes.)

34.30      Wells Fargo Bank, National Association, asCustodian of the Cape May Hotels Mortgage Loan (see Exhibit 34.4)

34.31      Pentalpha Surveillance LLC, as Operating Advisor ofthe Cape May Hotels Mortgage Loan (see Exhibit 34.5)

34.32      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.7)

34.33      KeyBank National Association, as Primary Servicerof the Soho-Tribeca Grand Hotel Portfolio Mortgage Loan

34.34      Situs Holdings, LLC, as Special Servicer of theSoho-Tribeca Grand Hotel Portfolio Mortgage Loan prior to August 6, 2021 (SeeExhibit 34.10)

34.35      Greystone Servicing Company LLC, as Special Servicer of the Soho-Tribeca GrandHotel Portfolio Mortgage Loan on and after August 6, 2021 (Omitted. SeeExplanatory Notes.)

34.36      Wells Fargo Bank, National Association, as Trustee of the Soho-Tribeca GrandHotel Portfolio Mortgage Loan (Omitted. See Explanatory Notes.)

34.37      Wells Fargo Bank, National Association, as Custodianof the Soho-Tribeca Grand Hotel Portfolio Mortgage Loan (see Exhibit 34.4)

34.38      Park Bridge Lender Services LLC, as OperatingAdvisor of the Soho-Tribeca Grand Hotel Portfolio Mortgage Loan

34.39      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.7)

34.40      KeyBank National Association, as Primary Servicerof the Westfield Trumbull Mortgage Loan (see Exhibit 34.33)

34.41      Greystone Servicing Company LLC (as successor to C-III Asset Management LLC),as Special Servicer of the Westfield Trumbull Mortgage Loan (Omitted. SeeExplanatory Notes.)

34.42      Wells Fargo Bank, National Association, as Trustee of the Westfield TrumbullMortgage Loan (Omitted. See Explanatory Notes.)

34.43      Wells Fargo Bank, National Association, asCustodian of the Westfield Trumbull Mortgage Loan (see Exhibit 34.4)

34.44      Park Bridge Lender Services LLC, as OperatingAdvisor of the Westfield Trumbull Mortgage Loan (see Exhibit 34.38)

34.45      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.7)

34.46      Wells Fargo Bank, National Association, as PrimaryServicer of the Westfield Wheaton Mortgage Loan

34.47      Rialto Capital Advisors, LLC, as Special Servicerof the Westfield Wheaton Mortgage Loan (see Exhibit 34.2)

34.48      Wilmington Trust, National Association, as Trustee of the Westfield WheatonMortgage Loan (Omitted. See Explanatory Notes.)

34.49      Wells Fargo Bank, National Association, asCustodian of the Westfield Wheaton Mortgage Loan (see Exhibit 34.4)

34.50      Park Bridge Lender Services LLC, as OperatingAdvisor of the Westfield Wheaton Mortgage Loan (see Exhibit 34.38)

34.51      CoreLogic Solutions, LLC, as Servicing FunctionParticipant of the Westfield Wheaton Mortgage Loan

34.52      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.7)

34.53      Wells Fargo Bank, National Association, as PrimaryServicer of the Sterling & Milagro Apartments Mortgage Loan (see Exhibit34.46)

34.54      Rialto Capital Advisors, LLC, as Special Servicerof the Sterling & Milagro Apartments Mortgage Loan (see Exhibit 34.2)

34.55      Wilmington Trust, National Association, as Trustee of the Sterling &Milagro Apartments Mortgage Loan (Omitted. See Explanatory Notes.)

34.56      Wells Fargo Bank, National Association, asCustodian of the Sterling & Milagro Apartments Mortgage Loan (see Exhibit34.4)

34.57      Park Bridge Lender Services LLC, as OperatingAdvisor of the Sterling & Milagro Apartments Mortgage Loan (see Exhibit34.38)

34.58      CoreLogic Solutions, LLC, as Servicing FunctionParticipant of the Sterling & Milagro Apartments Mortgage Loan (see Exhibit34.51)

34.59      Computershare Trust Company, National Association,as Servicing Function Participant for the Custodian on and after November 1,2021 (see Exhibit 34.7)

34.60      Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of the WPC Department Store PortfolioMortgage Loan (see Exhibit 34.1)

34.61      LNR Partners, LLC, as Special Servicer of the WPC Department Store PortfolioMortgage Loan (Omitted. See Explanatory Notes.)

34.62      U.S. Bank National Association, as Trustee and Custodian of the WPC DepartmentStore Portfolio Mortgage Loan (Omitted. See Explanatory Notes.)

34.63      Pentalpha Surveillance LLC, as Trust Advisor of theWPC Department Store Portfolio Mortgage Loan (see Exhibit 34.5)

35           Servicer compliance statements.

35.1        Midland Loan Services, a Division of PNC Bank,National Association, as Master Servicer

35.2        Rialto Capital Advisors, LLC, as Special Servicer

35.3        Wells Fargo Bank, National Association, asCertificate Administrator

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

35.5        Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of the Charles River Plaza NorthMortgage Loan (see Exhibit 35.1)

35.6        AEGON USA Realty Advisors, LLC, as Special Servicer of the Charles River PlazaNorth Mortgage Loan prior to August 6, 2021 (Omitted. See Explanatory Notes.)

35.7        Situs Holdings, LLC, as Special Servicer of the Charles River Plaza NorthMortgage Loan on and after August 6, 2021 (Omitted. See Explanatory Notes.)

35.8        Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of The Mall of New Hampshire MortgageLoan (see Exhibit 35.1)

35.9        Rialto Capital Advisors, LLC, as Special Servicerof The Mall of New Hampshire Mortgage Loan (see Exhibit 35.2)

35.10      Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of the Arizona Grand Resort & SpaMortgage Loan (see Exhibit 35.1)

35.11      Rialto Capital Advisors, LLC, as Special Servicerof the Arizona Grand Resort & Spa Mortgage Loan (see Exhibit 35.2)

35.12      Midland Loan Services, a Division of PNC Bank, NationalAssociation, as Primary Servicer of the Cape May Hotels Mortgage Loan (seeExhibit 35.1)

35.13      Rialto Capital Advisors, LLC, as Special Servicerof the Cape May Hotels Mortgage Loan (see Exhibit 35.2)

35.14      KeyBank National Association, as Primary Servicer of the Soho-Tribeca GrandHotel Portfolio Mortgage Loan (Omitted. See Explanatory Notes.)

35.15      Situs Holdings, LLC, as Special Servicer of the Soho-Tribeca Grand HotelPortfolio Mortgage Loan prior to August 6, 2021 (Omitted. See ExplanatoryNotes.)

35.16      Greystone Servicing Company LLC, as SpecialServicer of the Soho-Tribeca Grand Hotel Portfolio Mortgage Loan on and afterAugust 6, 2021 (Omitted. See Explanatory Notes.)

35.17      KeyBank National Association, as Primary Servicer of the Westfield TrumbullMortgage Loan (Omitted. See Explanatory Notes.)

35.18      Greystone Servicing Company LLC (as successor to C-III Asset Management LLC),as Special Servicer of the Westfield Trumbull Mortgage Loan (Omitted. SeeExplanatory Notes.)

35.19      Wells Fargo Bank, National Association, as PrimaryServicer of the Westfield Wheaton Mortgage Loan

35.20      Rialto Capital Advisors, LLC, as Special Servicerof the Westfield Wheaton Mortgage Loan (see Exhibit 35.2)

35.21      Wells Fargo Bank, National Association, as PrimaryServicer of the Sterling & Milagro Apartments Mortgage Loan (see Exhibit35.19)

35.22      Rialto Capital Advisors, LLC, as Special Servicerof the Sterling & Milagro Apartments Mortgage Loan (see Exhibit 35.2)

35.23      Midland Loan Services, a Division of PNC Bank,National Association, as Primary Servicer of the WPC Department Store PortfolioMortgage Loan (see Exhibit 35.1)

35.24      LNR Partners, LLC, as Special Servicer of the WPC Department Store PortfolioMortgage Loan (Omitted. See Explanatory Notes.)

99.1         Mortgage Loan Purchase Agreement, dated as of August 1,2015, between Credit Suisse First Boston Mortgage Securities Corp. and ColumnFinancial, Inc. (filed as Exhibit 99.1 to the registrant’s Current Report onForm 8-K filed on August 18, 2015 under Commission File No. 333-199921-03 andincorporated by reference herein)

99.2         Mortgage Loan Purchase Agreement, dated as of August 1,2015, between Credit Suisse First Boston Mortgage Securities Corp. and UBS RealEstate Securities Inc. (filed as Exhibit 99.2 to the registrant’s CurrentReport on Form 8-K filed on August 18, 2015 under Commission File No.333-199921-03 and incorporated by reference herein)

99.3         Mortgage Loan Purchase Agreement, dated as of August 1,2015, between Credit Suisse First Boston Mortgage Securities Corp. and The Bankof New York Mellon (filed as Exhibit 99.3 to the registrant’s Current Report onForm 8-K filed on August 18, 2015 under Commission File No. 333-199921-03 andincorporated by reference herein)

99.4         Mortgage Loan Purchase Agreement, dated as of August 1,2015, between Credit Suisse First Boston Mortgage Securities Corp. and BenefitStreet Partners CRE Finance LLC (filed as Exhibit 99.4 to the registrant’sCurrent Report on Form 8-K filed on August 18, 2015 under Commission File No.333-199921-03 and incorporated by reference herein)

99.5         Mortgage Loan Purchase Agreement, dated as of August 1,2015, between Credit Suisse First Boston Mortgage Securities Corp. and The BancorpBank (filed as Exhibit 99.5 to the registrant’s Current Report on Form 8-Kfiled on August 18, 2015 under Commission File No. 333-199921-03 andincorporated 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 theSecurities Exchange Act of 1934, the registrant has duly caused this report tobe signed on its behalf by the undersigned, thereunto duly authorized.

Credit Suisse First Boston MortgageSecurities Corp.(Depositor)

/s/ Oliver Nisenson

Oliver Nisenson, Director

(senior officer in charge ofsecuritization of the depositor)

Date: March 16, 2022