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, 2017
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) | 46-1661720
46-1677972
(I.R.S. Employer
Identification 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, 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.





2







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.












3







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.





4







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.





5







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 U.S. Bank, National Association, as trustee, certificate administrator and custodian, and Deutsche
Bank Trust Company Americas, as trustee, certificate administrator and custodian:



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 with the most substantial
case being: 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.). 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 a derivative action against DBNTC and DBTCA in New York State
Supreme Court purportedly on behalf of and for the benefit of 544 private-label RMBS trusts asserting claims for alleged violations
of the U.S. Trust Indenture Act of 1939 (“TIA”), breach of contract, breach of fiduciary duty and negligence based
on DBNTC and DBTCA’s alleged failure to perform their duties as trustees for the trusts. Plaintiffs subsequently dismissed
their state court complaint and filed a derivative and class action complaint in the U.S. District Court for the Southern District
of New York on behalf of and for the benefit of 564 private-label RMBS trusts, which substantially overlapped with the trusts
at issue in the state court action. The complaint alleges that the trusts at issue have suffered total realized collateral losses
of U.S. $89.4 billion, but the complaint does not include a demand for money damages in a sum certain. DBNTC and DBTCA filed a
motion to dismiss, and on January 19, 2016, the court partially granted the motion on procedural grounds: as to the 500 trusts
that are governed by pooling and servicing agreements, the court declined to exercise jurisdiction. The court did not rule on
substantive defenses asserted in the motion to dismiss. On March 22, 2016, plaintiffs filed an amended complaint in federal court.
In the amended complaint, in connection with 62 trusts governed by indenture agreements, plaintiffs assert claims for breach of
contract, violation of the TIA, breach of fiduciary duty, and breach of duty to avoid conflicts of interest. The amended complaint
alleges that the trusts at issue have suffered total realized collateral losses of U.S. $9.8 billion, but the complaint does not
include a demand for money damages in a sum certain. On July 15, 2016, DBNTC and DBTCA filed a motion to dismiss the amended complaint.
On January 23, 2017, the court granted in part and denied in part DBNTC and DBTCA’s motion to dismiss. The court granted
the motion to dismiss with respect to plaintiffs’ conflict-of-interest claim, thereby dismissing it, and denied the motion
to dismiss with respect to plaintiffs’ breach of contract claim (except as noted below) and claim for violation of the TIA,
thereby allowing those claims to proceed. On January 26, 2017, the parties filed a joint stipulation and proposed order dismissing
plaintiffs’ claim for breach of fiduciary duty. On January 27, 2017, the court entered the parties’ joint stipulation
and ordered that plaintiffs’ claim for breach of fiduciary duty be dismissed. On February 3, 2017, following a hearing concerning
DBNTC and DBTCA’s motion to dismiss on February 2, 2017, the court issued a short form order dismissing (i) plaintiffs’
representation and warranty claims as to 21 trusts whose originators and/or sponsors had entered bankruptcy and the deadline for
asserting claims against such originators and/or sponsors had passed as of 2009 and (ii) plaintiffs’ claims to





6







the extent they were premised
upon any alleged pre-event of default duty to terminate servicers. On March 27, 2017, DBNTC and DBTCA filed an answer to the amended
complaint. On January 26, 2018, Plaintiffs filed a motion for class certification. The parties are currently briefing the motion.
Discovery is ongoing.



On March 25, 2016, the BlackRock plaintiffs filed a state
court action against DBTCA in the Superior Court of California, Orange County with respect to 513 trusts. On May 18, 2016, plaintiffs
filed an amended complaint with respect to 465 trusts, and included DBNTC as an additional defendant. The amended complaint asserts
three causes of action: breach of contract; breach of fiduciary duty; and breach of the duty to avoid conflicts of interest. Plaintiffs
purport to bring the action on behalf of themselves and all other current owners of certificates in the 465 trusts. The amended
complaint alleges that the trusts at issue have suffered total realized collateral losses of U.S. $75.7 billion, but does not include
a demand for money damages in a sum certain. On August 22, 2016, DBNTC and DBTCA filed a demurrer as to Plaintiffs’ breach
of fiduciary duty cause of action and breach of the duty to avoid conflicts of interest cause of action and motion to strike as
to Plaintiffs’ breach of contract cause of action. On October 18, 2016, the court granted DBNTC and DBTCA’s demurrer,
providing Plaintiffs with thirty days’ leave to amend, and denied DBNTC and DBTCA’s motion to strike. Plaintiffs did
not further amend their complaint and, on December 19, 2016, DBNTC and DBTCA filed an answer to the amended complaint. On January
17, 2018, Plaintiffs filed a motion for class certification. The parties are currently briefing the motion. Discovery is ongoing.



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 TIA; breach of contract; breach of fiduciary duty; negligence and gross negligence;
violation of the 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. Discovery
is ongoing.



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. Discovery is ongoing.



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 New York’s Streit Act, violation of the Trust Indenture Act, 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, IKB filed a notice of discontinuance, voluntarily dismissing with prejudice all claims as to three trusts.
As of January 17, 2017, DBNTC and DBTCA’s motion to dismiss has been briefed and is awaiting decision by the court. On June
20, 2017, the parties filed a stipulation, voluntarily dismissing with prejudice all claims as to four additional trusts. Certain
limited discovery is permitted to go forward while the motion to dismiss is pending.



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
as trustee, certificate administrator and custodian under the UBS-Barclays 2012-C3 pooling and servicing agreement relating to
this CMBS 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





7







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).



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
| | ---- | -----------------------------------------------------------------------------------





8







| | 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.





9







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/ Nicolas Galeone                                                                      | 
|Nicolas Galeone, President
(senior officer in
charge of securitization of the depositor) | 
|                                                                                         | 
|Date: March 22, 2018                                                                     | 
|                                                                                         | 
|/s/ David Schell                                                                         | 
|David Schell, Managing Director                                                          | 
|                                                                                         | 
|Date: March 22, 2018                                                                     | 



10