UNITED STATES
SECURITIES AND EXCHANGE COMMISSION



Washington, D.C. 20549



FORM 10-K



(Mark One)



|☒ | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934
|- | ------------------------------------------------------------------------------------



For the fiscal year ended December 31,
2018
or



|☐ | TRANSITION REPORT 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: 333-177354-04

Central Index Key Number of the issuing
entity: 0001559450

UBS-Barclays Commercial Mortgage Trust
2012-C4

(exact name of the issuing entity as specified
in its charter)



Central Index Key Number of the depositor:
0001532799

UBS Commercial Mortgage Securitization
Corp.

(exact name of the depositor 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:
0000312070

Barclays Bank PLC

(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)



Central Index Key Number of the sponsor:
0000040554

General Electric Capital Corporation

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



Central Index Key Number of the sponsor:
0001175134

RAIT Partnership, L.P.

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



Central Index Key Number of the sponsor:
0001567746

Redwood Commercial Mortgage Corporation

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



|New York(State or other jurisdiction ofincorporation or organization ofthe issuing entity) | 46-166172046-1677972(I.R.S. EmployerIdentification Numbers)
|------------------------------------------------------------------------------------------ | -----------------------------------------------------------



c/o U.S. Bank National Association

as Certificate Administrator

190 S. LaSalle Street

Chicago, IL

(Address of principal executive offices
of the issuing entity)



60603

(Zip Code)



Registrant’s telephone number, including
area code:

(212) 713-2000



Securities registered pursuant to Section 12(b) of the Act: None.



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



Indicate by check mark if the registrant is a well-known seasoned
issuer, as defined in Rule 405 of the Securities Act.  ☐  Yes  ☒  No



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



Indicate by check mark whether the registrant (1) has filed all
reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or
for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements
for the past 90 days.  ☒  Yes  ☐  No



Indicate by check mark whether the registrant has submitted electronically
and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule
405 of Regulation 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 post such files).



Not applicable.



Indicate by check mark if disclosure of delinquent filers pursuant
to Item 405 of Regulation S-K (Section 229.405 of this chapter) is not contained herein, and will not be contained, to the best
of registrant’s knowledge, in definitive proxy or information statements incorporated by reference 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 large accelerated
filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions
of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging
growth company” in Rule 12b-2 of the Exchange Act.



|Large
    accelerated filer | ☐                                                    | Accelerated
    filer         | ☐
|--------------------------- | ---------------------------------------------------- | ----------------------------- | -
|                            |                                                      |                               |  
|Non-accelerated
    filer   | ☒  (Do
    not check if a smaller reporting company) | Smaller reporting
    company | ☐
|                            |                                                      |                               |  
|                            |                                                      | Emerging
    growth company   | ☐



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



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



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



Not applicable.



Indicate by check mark whether the registrant has filed all documents
and reports required to be filed by Section 12, 13 or 15(d) of the Securities Exchange Act of 1934 subsequent to the distribution
of securities under a plan confirmed by a court.  ☐  Yes  ☐  No



Not applicable.



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



Not applicable.



DOCUMENTS INCORPORATED BY REFERENCE



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



Not applicable.








EXPLANATORY NOTES



The Exhibit Index describes exhibits provided by certain parties
(in their capacities indicated on the Exhibit Index) with respect to the 1000 Harbor Boulevard Mortgage Loan, which constituted
approximately 0.5% of the asset pool of the issuing entity as of its cut-off date. The 1000 Harbor Boulevard Mortgage Loan is an
asset of the issuing entity and is part of a loan combination that includes the 1000 Harbor Boulevard Mortgage Loan and one other
pari passu loan, which is not an asset of the issuing entity. The other pari passu portion of the loan combination
was securitized in the UBS-Barclays Commercial Mortgage Trust 2012-C3 transaction, Commission File Number 333-177354-03 (the “UBS-Barclays
2012-C3 Transaction”). This loan combination, including the 1000 Harbor Boulevard Mortgage Loan, is being serviced and
administered pursuant to the pooling and servicing agreement for the UBS-Barclays 2012-C3 Transaction, which is incorporated by
reference as Exhibit 4.2 to this Annual Report on Form 10-K. Midland Loan Services, a Division of PNC Bank, National Association
is the master servicer under the pooling and servicing agreement for the UBS-Barclays 2012-C3 Transaction. The responsibilities
of Midland Loan Services, a Division of PNC Bank, National Association, as primary servicer of this loan combination with respect
to the issuing entity, are subsumed within its responsibilities as master servicer under the pooling and servicing agreement for
the UBS-Barclays 2012-C3 Transaction.



Rialto Capital Advisors, LLC is the special servicer of the mortgage
loans serviced under the Pooling and Servicing Agreement and the 1000 Harbor Boulevard Mortgage Loan. As a result, Rialto Capital
Advisors, LLC is a “servicer” as defined in Item 1108(a)(2)(iii) of Regulation AB, in the capacities described above,
because it is servicing mortgage loans that constituted 10% or more of the assets of the issuing entity as of its cut-off date.
The assessments of compliance with applicable servicing criteria, accountants’ attestation reports and servicer compliance
statements delivered by Rialto Capital Advisors, LLC in the capacities described above are listed in the Exhibit Index.



This Annual Report on Form 10-K includes assessments of compliance
with applicable servicing criteria and accountants’ attestation reports from CoreLogic Commercial Real Estate Services, Inc.
and National Tax Search, LLC. These entities were engaged by the master servicer under the Pooling and Servicing Agreement to remit
tax payments received from the escrow accounts of borrowers to local taxing authorities, to report tax amounts due, to verify tax
parcel information, and to verify non-escrow tax payments. These servicing functions are included within the servicing criteria
set forth in Items 1122(d)(4)(xi) and 1122(d)(4)(xii) of Regulation AB. Therefore, under the principles-based definition of “servicer”
set forth in Item 1101(j) of Regulation AB that looks to the functions that an entity performs, these vendors are “servicers”
for the purposes of Item 1122 of Regulation AB. See Compliance and Disclosure Interpretations, Section 301.01 (Item 1101(j)).



With respect to the pari passu loan combination that includes
the 1000 Harbor Boulevard Mortgage Loan, (i) the report on assessment of compliance with servicing criteria and attestation report
on assessment of compliance with servicing criteria of Midland Loan Services, a Division of PNC Bank, National Association, as
master servicer of the 1000 Harbor Boulevard Mortgage Loan, Deutsche Bank Trust Company Americas, as trustee, certificate administrator
and custodian of the 1000 Harbor Boulevard Mortgage Loan and Park Bridge Lender Services LLC, as operating advisor of the 1000
Harbor Boulevard Mortgage Loan, listed on the Exhibit Index are omitted from this Annual Report on Form 10-K as they are not required
to be included on this Annual Report on Form 10-K per Instruction 3 to Item 1122 of Regulation AB because they are parties performing
activities that address servicing criteria relating to 5% or less of the assets of the issuing entity; and (ii) the servicer compliance
statements of Midland Loan Services, a Division of PNC Bank, National Association, as master servicer of the 1000 Harbor Boulevard
Mortgage Loan and Deutsche Bank Trust Company Americas, as certificate administrator of the 1000 Harbor Boulevard Mortgage Loan,
listed on the Exhibit Index are omitted from this Annual Report on Form 10-K as they are not required by Item 1123 of Regulation
AB to be included on this Annual Report on Form 10-K because they are each an unaffiliated party that is not a “servicer”
that meets the criteria in Item 1108(a)(2)(i) through (iii) 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 of Financial
Condition and Results of Operations.



Omitted.



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



Omitted.



Item 8. Financial Statements and Supplementary Data.



Omitted.



Item 9. Changes in and Disagreements With Accountants 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 Corporate Governance.



Omitted.



Item 11. Executive Compensation.



Omitted.



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



Omitted.



Item 13. Certain Relationships and Related Transactions, 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 Obligor Financial
Information.



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



Item 1114(b)(2) of Regulation AB, Significant Enhancement Provider
Financial Information.



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



Item 1115(b) of Regulation AB, Certain Derivatives Instruments
(Financial Information).



No entity or group of affiliated entities provides any derivative
instruments or other support for the certificates within this transaction as described under Item 1115 of Regulation AB.



Item 1117 of Regulation AB, Legal Proceedings.



The registrant knows of no material pending legal proceeding
involving the trust or any party related to the trust, other than routine litigation incidental to the duties of those respective
parties, and the following, with respect to RAIT Partnership, L.P., as loan seller, U.S. Bank, National Association, as trustee,
as certificate administrator and as custodian, and Deutsche Bank Trust Company Americas, as trustee, as certificate administrator
and as custodian:

On September 20, 2017, RAIT Preferred Funding II, Ltd., or
RAIT II, filed an amended complaint against CWCapital Asset Management, LLC, or CWCapital, Wells Fargo Bank N.A., or Wells Fargo,
and U.S. Bank N.A., or U.S. Bank. This action concerns a loan, or the mortgage loan, to a non-party borrower, or the borrower,
in 2007. RAIT II purchased $18,500,000 of the mortgage loan for which it held a promissory note, or note B. U.S. Bank is the trustee
for a securitization trust that purchased the remaining $190,000,000 of the mortgage loan and for which it held a promissory note,
or note A. CWCapital is the special servicer and Wells Fargo is the master servicer for the mortgage loan (including note A and
note B). The parties’ rights and obligations are governed by, among other things, a pooling and servicing agreement and a
co-lender agreement. The mortgage loan was repaid in May of 2017, and the defendants have alleged that RAIT II was not entitled
to receive any payoff of principal under note B pursuant to the subordination and other provisions of the co-lender agreement.
In the amended complaint, RAIT II alleges, among other things, that the defendants breached certain of its obligations under the
operative documents and RAIT II should have received, among other things, all of its $18.5 million principal under note B. The
court denied defendants’ motion to dismiss RAIT II’s amended complaint, and the parties are now in the midst of the
discovery phase of the litigation. RAIT Partnership, L.P. served as the collateral manager and servicer for RAIT II.

Since 2014 various plaintiffs or groups of plaintiffs, primarily
investors, have filed claims against U.S. Bank National Association (“U.S. Bank”), in its capacity as trustee or successor
trustee (as the case may be) under certain residential mortgage backed securities (“RMBS”) trusts. The plaintiffs or
plaintiff groups have filed substantially similar complaints against other RMBS trustees, including Deutsche Bank, Citibank, HSBC,
Bank of New York Mellon and Wells Fargo. The complaints against U.S. Bank allege the trustee caused losses to investors as a result
of alleged failures by the sponsors, mortgage loan sellers and servicers for these RMBS trusts and assert causes of action based
upon the trustee’s purported failure to enforce repurchase obligations of mortgage loan sellers for alleged breaches of representations
and warranties concerning loan quality. The complaints also assert that the trustee failed to notify securityholders of purported
events of default allegedly caused by breaches of servicing standards by mortgage loan servicers and that the trustee purportedly
failed to abide by a heightened standard of care following alleged events of default.

Currently U.S. Bank is a defendant in multiple actions alleging
individual or class action claims against the trustee with respect to multiple trusts as described above. Previously, U.S. Bank
disclosed that the most substantial case was: BlackRock Balanced Capital Portfolio et al v. U.S. Bank National Association, No.
605204/2015 (N.Y. Sup. Ct.) (class action alleging claims with respect to approximately 770 trusts) and its companion case BlackRock
Core Bond Portfolio et al v. U.S Bank National Association, No. 14-cv-9401 (S.D.N.Y.) (collectively, the “BlackRock cases”).
U.S. Bank has entered into a settlement agreement that will resolve the BlackRock cases following approval of the dismissals by
the applicable court. Some of the trusts implicated in the aforementioned Blackrock cases, as well as other trusts, are involved
in actions brought by separate groups of plaintiffs related to no more than 100 trusts per case.

U.S. Bank cannot assure you as to the outcome of any of the
litigation, or the possible impact of these litigations on the trustee or the RMBS trusts. However, U.S. Bank denies liability
and believes that it has performed its obligations under the RMBS trusts in. good faith, that its actions were not the cause of
losses to investors and that it has meritorious defenses, and it intends to contest the plaintiffs’ claims vigorously.

Deutsche Bank Trust Company Americas (“DBTCA”)
and Deutsche Bank National Trust Company (“DBNTC”) have been sued by investors in civil litigation concerning their
role as trustees of certain RMBS trusts.

On June 18, 2014, a group of investors, including funds managed
by Blackrock Advisors, LLC, PIMCO-Advisors, L.P., and others, filed an action against DBNTC and DBTCA in New York State Supreme
Court alleging that DBNTC and DBTCA failed to perform purported duties, as trustees for 544 private-label RMBS trusts, to enforce
breaches of representations and warranties as to mortgage loans held by the trusts and to enforce breaches by servicers of their
mortgage loan servicing obligations for the trusts. During the course of the litigation, plaintiffs dismissed the case from New
York State Supreme Court and refiled two separate cases, one in the U.S. District Court for the Southern District of New York (the
“BlackRock SDNY Case”) and the other in the Superior Court of California, Orange County (the “BlackRock California
Case”). Pursuant to a settlement among the parties, the BlackRock SDNY Case was dismissed on December 6, 2018 and the BlackRock
California Case was dismissed on January 11, 2019.

On September 27, 2017, DBTCA was added as a defendant to a
case brought by certain special purpose entities including Phoenix Light SF Limited in the U.S. District Court for the Southern
District of New York, in which the plaintiffs previously alleged incorrectly that DBNTC served as trustee for all 43 of the trusts
at issue. On September 27, 2017, plaintiffs filed a third amended complaint that names DBTCA as a defendant in addition to DBNTC.
DBTCA serves as trustee for one of the 43 trusts at issue. DBNTC serves as trustee for the other 42 trusts at issue. Plaintiffs’
third amended complaint brings claims for violation of the U.S. Trust Indenture Act of 1939 (“TIA”); breach of contract;
breach of fiduciary duty; negligence and gross negligence; violation of New York’s Streit Act; and breach of the covenant
of good faith. However, in the third amended complaint, plaintiffs acknowledge that, before DBTCA was added to the case, the court
dismissed plaintiffs’ TIA Act claims, negligence and gross negligence claims, Streit Act claims, claims for breach of the
covenant of good faith, and certain theories of plaintiffs’ breach of contract claims, and plaintiffs only include these
claims to preserve any rights on appeal. Plaintiffs allege damages of “hundreds of millions of dollars.” On November
13, 2017, DBNTC and DBTCA filed an answer to the third amended complaint. On December 7, 2018, DBNTC and DBTCA filed a motion for
summary judgment. Also on December 7, 2018, plaintiffs, jointly with Commerzbank AG (see description of Commerzbank case below),
filed a motion for partial summary judgment.

On November 30, 2017, DBTCA was added as a defendant to a
case brought by Commerzbank AG (“Commerzbank”) in the U.S. District Court for the Southern District of New York, in
which Commerzbank previously alleged incorrectly that DBNTC served as trustee for all 50 of the trusts at issue. On November 30,
2017, Commerzbank filed a second amended complaint that names DBTCA as a defendant in addition to DBNTC. DBTCA serves as trustee
for 1 of the 50 trusts at issue. DBNTC serves as trustee for the other 49 trusts at issue. Commerzbank’s second amended complaint
brings claims for violation of the TIA; breach of contract; breach of fiduciary duty; negligence; violation of the Streit Act;
and breach of the covenant of good faith. However, in the second amended complaint, Commerzbank acknowledges that, before DBTCA
was added to the case, the court dismissed Commerzbank’s TIA claims for the trusts governed by pooling and servicing agreements,
as well as its Streit Act claims and claims for breach of the covenant of good faith, and Commerzbank only includes these claims
to preserve any rights on appeal. The second amended complaint alleges that DBNTC and DBTCA caused Commerzbank to suffer “hundreds
of millions of dollars in losses,” but the complaint does not include a demand for money damages in a sum certain. On January
29, 2018, DBNTC and DBTCA filed an answer to the second amended complaint. On December 7, 2018, DBNTC and DBTCA filed a motion
for summary judgment. Also on December 7, 2018, Commerzbank, jointly with the Phoenix Light plaintiffs, filed a motion for partial
summary judgment.

On December 30, 2015, IKB International, S.A. in Liquidation
and IKB Deutsche Industriebank A.G. (collectively, “IKB”), as an investor in 37 RMBS trusts, filed a summons with notice
in the Supreme Court of the State of New York, New York County, against DBNTC and DBTCA as trustees of the trusts. On May 27, 2016,
IKB served its complaint asserting claims for breach of contract, breach of fiduciary duty, breach of duty to avoid conflicts of
interest, violation of the Streit Act, violation of the TIA, violation of Regulation AB, and violation of Section 9 of the Uniform
Commercial Code. IKB alleges that DBNTC and DBTCA are liable for over U.S. $268 million in damages. On October 5, 2016, DBNTC and
DBTCA, together with several other trustees defending lawsuits by IKB, filed a joint motion to dismiss. On January 6, 2017 and
June 20, 2017, IKB voluntarily dismissed with prejudice all claims as to seven trusts. As of March 1, 2019, DBNTC and DBTCA’s
motion to dismiss has been briefed and is awaiting decision by the court.

It is DBTCA’s belief that it has no pending legal proceedings
(including, based on DBTCA’s present evaluation, the litigation disclosed in the foregoing paragraphs) that would materially
affect its ability to perform its duties under the related servicing agreement for this transaction.



Item 1119 of Regulation AB, Affiliations and Certain Relationships
and Related Transactions.



The information regarding this Item has been previously provided
in a prospectus supplement of the Registrant relating to the issuing entity filed on December 19, 2012 pursuant to Rule 424(b)(5).



Item 1122 of Regulation AB, Compliance with Applicable Servicing
Criteria.



The reports on assessments of compliance with the servicing criteria
for asset-backed securities and related attestation reports on such assessments of compliance with respect to the mortgage loans
are attached hereto under Item 15 to this Annual Report on Form 10-K. Attached as Schedule II to the Pooling and Servicing Agreement
incorporated by reference as Exhibit 4.1 to this Annual Report on Form 10-K is a chart identifying the entities participating in
a servicing function for the transaction responsible for each applicable servicing criteria set forth in Item 1122(d).



The reports on assessments of compliance with the servicing criteria
for asset-backed securities and related attestation reports on such assessments of compliance with respect to the 1000 Harbor Boulevard
Mortgage Loan, which is being serviced and administered pursuant to the pooling and servicing agreement for the UBS-Barclays 2012-C3
Transaction, are attached hereto under Item 15 to this Annual Report on Form 10-K. Attached as Schedule II to the pooling and servicing
agreement for the UBS-Barclays 2012-C3 Transaction incorporated by reference as Exhibit 4.2 to this Annual Report on Form 10-K
is a chart identifying the entities participating in a servicing function for the UBS-Barclays 2012-C3 Transaction responsible
for each applicable servicing criteria set forth in Item 1122(d).



The report on assessment of compliance with applicable servicing
criteria furnished pursuant to Item 1122 of Regulation AB by Midland Loan Services, a Division of PNC Bank National Association
discloses that a material instance of noncompliance occurred, as described below:

Material Instance of Noncompliance

In certain instances, the Schedule AL Files (Item 1125
of Regulation AB) were not reported in accordance with the terms specified in the transaction agreements, in conflict with Item
1122(d)(3)(i): “Reports to investors, including those to be filed with the Commission, are maintained in accordance with
the transaction agreements and applicable Commission requirements. Specifically, such reports: (A) Are prepared in accordance with
timeframes and other terms set forth in the transaction agreements”. The noncompliance consisted of omitted or inaccurately
reported numbers due to the following: (1) the initial setup files contained information at the asset level, and Midland was required
to manually compile the information to present it at the loan level as required by Schedule AL; and (2) certain reporting requirements
required manual processing by Midland, including the use of various data computation formulas, quality control checks and analysis.

The identified instances did not involve the servicing
of assets included in this securitization.

Steps Taken to Remedy the Material Instance of Noncompliance

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

Report on Assessment of Compliance with Applicable Servicing
Criteria Not Included

For the reasons discussed in the Explanatory Notes above,
Midland is not a party performing activities that address servicing criteria relating to 5% or more of the assets of the issuing
entity. Therefore, the report of assessment of compliance with applicable servicing criteria for Midland has not been included
as an exhibit to this Annual Report on Form 10-K.



Item 1123 of Regulation AB, Servicer Compliance Statement.



The servicer compliance statements are attached as Exhibits to 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 of this Annual
Report on Form 10-K:



(1) Not applicable



(2) Not applicable



(3) See below





| | 4.1 | Pooling and Servicing Agreement, dated as of December 1, 2012,
by and among UBS Commercial Mortgage Securitization Corp., as Depositor, Wells Fargo Bank, National Association, as Master Servicer, Rialto Capital Advisors, LLC, as Special Servicer, TriMont Real Estate
Advisors, Inc., as Operating Advisor, and U.S. Bank National Association, as Trustee, Certificate Administrator, Paying Agent and Custodian (filed as Exhibit 4 to the registrant’s Current Report on Form 8-K filed on December 20, 2012 under Commission File No. 333-177354-04 and incorporated by reference herein).
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 4.2 | Pooling and Servicing Agreement, dated as of September 1, 2012, by and among UBS Commercial Mortgage Securitization Corp., as Depositor, Midland Loan Services, a Division of PNC Bank, National Association, as Master Servicer, Rialto Capital Advisors, LLC, as Special Servicer, Park Bridge Lender Services LLC, as Operating Advisor, and Deutsche Bank Trust Company Americas, as Trustee, Certificate Administrator, Paying Agent and Custodian (filed as Exhibit 4 to the registrant’s Current Report on Form 8-K filed on September 27, 2012 under Commission File No. 333-177354-03 and incorporated by reference herein).
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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



| | 33 | Reports on assessment of compliance with servicing criteria for asset-backed securities.
| | -- | ----------------------------------------------------------------------------------------



| | 33.1 | Wells Fargo Bank, National Association, as Master Servicer
| | ---- | ----------------------------------------------------------



| | 33.2 | Rialto Capital Advisors, LLC, as Special Servicer
| | ---- | -------------------------------------------------



| | 33.3 | U.S. Bank National Association, as Trustee, Certificate Administrator and Custodian
| | ---- | -----------------------------------------------------------------------------------



| | 33.4 | TriMont Real Estate Advisors, Inc., as Operating Advisor
| | ---- | --------------------------------------------------------



| | 33.5 | CoreLogic Commercial Real Estate Services, Inc., as Servicing Function Participant
| | ---- | ----------------------------------------------------------------------------------



| | 33.6 | National Tax Search, LLC, as Servicing Function Participant
| | ---- | -----------------------------------------------------------



| | 33.7 | Midland Loan Services, a Division of PNC Bank, National Association, as Primary Servicer of the 1000 Harbor Boulevard Mortgage
Loan (Omitted. See Explanatory Notes.)
| | ---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 33.8 | Rialto Capital Advisors, LLC, as Special Servicer of the 1000 Harbor Boulevard Mortgage Loan (see Exhibit 33.2)
| | ---- | ---------------------------------------------------------------------------------------------------------------



| | 33.9 | Deutsche Bank Trust Company Americas, as Trustee, Certificate Administrator and Custodian of the 1000 Harbor Boulevard Mortgage
Loan (Omitted. See Explanatory Notes.)
| | ---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 33.10 | Park Bridge Lender Services LLC, as Operating Advisor of the 1000 Harbor Boulevard Mortgage Loan (Omitted. See Explanatory
Notes.)
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------



| | 34 | Attestation reports on assessment of compliance with servicing criteria for asset-backed securities.
| | -- | ----------------------------------------------------------------------------------------------------



| | 34.1 | Wells Fargo Bank, National Association, as Master Servicer
| | ---- | ----------------------------------------------------------



| | 34.2 | Rialto Capital Advisors, LLC, as Special Servicer
| | ---- | -------------------------------------------------



| | 34.3 | U.S. Bank National Association, as Trustee, Certificate Administrator and Custodian
| | ---- | -----------------------------------------------------------------------------------



| | 34.4 | TriMont Real Estate Advisors, Inc., as Operating Advisor
| | ---- | --------------------------------------------------------



| | 34.5 | CoreLogic Commercial Real Estate Services, Inc., as Servicing Function Participant
| | ---- | ----------------------------------------------------------------------------------



| | 34.6 | National Tax Search, LLC, as Servicing Function Participant
| | ---- | -----------------------------------------------------------



| | 34.7 | Midland Loan Services, a Division of PNC Bank, National Association, as Primary Servicer of the 1000 Harbor Boulevard Mortgage
Loan (Omitted. See Explanatory Notes.)
| | ---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 34.8 | Rialto Capital Advisors, LLC, as Special Servicer of the 1000 Harbor Boulevard Mortgage Loan (see Exhibit 34.2)
| | ---- | ---------------------------------------------------------------------------------------------------------------



| | 34.9 | Deutsche Bank Trust Company Americas, as Trustee, Certificate Administrator and Custodian of the 1000 Harbor Boulevard Mortgage
Loan (Omitted. See Explanatory Notes.)
| | ---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 34.10 | Park Bridge Lender Services LLC, as Operating Advisor of the 1000 Harbor Boulevard Mortgage Loan (Omitted. See Explanatory
Notes.)
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------



| | 35 | Servicer compliance statements.
| | -- | -------------------------------



| | 35.1 | Wells Fargo Bank, National Association, as Master Servicer
| | ---- | ----------------------------------------------------------



| | 35.2 | Rialto Capital Advisors, LLC, as Special Servicer
| | ---- | -------------------------------------------------



| | 35.3 | U.S. Bank National Association, as Certificate Administrator
| | ---- | ------------------------------------------------------------



| | 35.4 | Midland Loan Services, a Division of PNC Bank, National Association, as Primary Servicer of the 1000 Harbor Boulevard Mortgage
Loan (Omitted. See Explanatory Notes.)
| | ---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 35.5 | Rialto Capital Advisors, LLC, as Special Servicer of the 1000 Harbor Boulevard Mortgage Loan
| | ---- | --------------------------------------------------------------------------------------------



| | 35.6 | Deutsche Bank Trust Company Americas, as Certificate Administrator of the 1000 Harbor Boulevard Mortgage Loan (Omitted. See
Explanatory Notes.)
| | ---- | -----------------------------------------------------------------------------------------------------------------------------------------------



| | 99.1 | Mortgage Loan Purchase Agreement, dated as of December 20, 2012, between UBS Real Estate Securities Inc. and UBS Commercial Mortgage Securitization Corp. (filed as Exhibit 99.1 to the registrant’s Current Report on Form 8-K filed on December 20, 2012 under Commission File No. 333-177354-04 and incorporated by reference herein)
| | ---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 99.2 | Mortgage Loan Purchase Agreement, dated as of December 20, 2012, between Barclays Bank PLC and UBS Commercial Mortgage Securitization Corp. (filed as Exhibit 99.2 to the registrant’s Current Report on Form 8-K filed on December 20, 2012 under Commission File No. 333-177354-04 and incorporated by reference herein)
| | ---- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 99.3 | Mortgage Loan Purchase Agreement, dated as of December 20, 2012, between Natixis Real Estate Capital LLC and UBS Commercial Mortgage Securitization Corp. (filed as Exhibit 99.3 to the registrant’s Current Report on Form 8-K filed on December 20, 2012 under Commission File No. 333-177354-04 and incorporated by reference herein)
| | ---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 99.4 | Mortgage Loan Purchase Agreement, dated as of December 20, 2012, between General Electric Capital Corporation and UBS Commercial Mortgage Securitization Corp. (filed as Exhibit 99.4 to the registrant’s Current Report on Form 8-K filed on December 20, 2012 under Commission File No. 333-177354-04 and incorporated by reference herein)
| | ---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 99.5 | Mortgage Loan Purchase Agreement, dated as of December 20, 2012, between RAIT Partnership, L.P. and UBS Commercial Mortgage Securitization Corp. (filed as Exhibit 99.5 to the registrant’s Current Report on Form 8-K filed on December 20, 2012 under Commission File No. 333-177354-04 and incorporated by reference herein)
| | ---- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 99.6 | Mortgage Loan Purchase Agreement, dated as of December 20, 2012, between Redwood Commercial Mortgage Corporation and UBS Commercial Mortgage Securitization Corp. (filed as Exhibit 99.6 to the registrant’s Current Report on Form 8-K filed on December 20, 2012 under Commission File No. 333-177354-04 and incorporated by reference herein)
| | ---- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



(b)       The exhibits required
to be filed by the Registrant pursuant to Item 601 of Regulation S-K are listed above and in the Exhibit Index that immediately
follows the signature page hereof.



(c)       Not Applicable.





SIGNATURES



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



|UBS Commercial Mortgage Securitization Corp.
    (Depositor)                                  | 
|--------------------------------------------------------------------------------------------- | 
|                                                                                              | 
|/s/ Nicholas Galeone                                                                          | 
|Nicholas Galeone, President
    (senior officer in charge of securitization of the depositor) | 
|                                                                                              | 
|Date: March 27, 2019                                                                          | 
|                                                                                              | 
|/s/ David Schell                                                                              | 
|David Schell, Managing Director                                                               | 
|                                                                                              | 
|Date: March 27, 2019                                                                          |