UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

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

For the fiscal year ended December 31, 2025

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from _____________ to _____________

333-189017-04

(Commission File Number of Issuing entity)

0001605257

(Central Index Key Number of issuing entity)

Citigroup Commercial Mortgage Trust 2014-GC21

(Exact name of issuing entity as specified in its charter)

333-189017

(Commission File Number of depositor)

0001258361

(Central Index Key Number of depositor)

Citigroup Commercial Mortgage Securities Inc.

(Exact name of depositor as specified in its charter)

Citigroup Global Markets Realty Corp.

(Central Index Key Number: 0001541001)

Goldman Sachs Mortgage Company

(Central Index Key Number: 0001541502)

Cantor Commercial Real Estate Lending, L.P.

(Central Index Key Number: 0001558761)

MC-Five Mile Commercial Mortgage Finance LLC

(Central Index Key Number: 0001576832)

RAIT Funding, LLC

(Central Index Key Number: 0001587045)

Redwood Commercial Mortgage Corporation

(Central Index Key Number: 0001567746)

(Exact name of sponsor(s) as specified in its charter)

New York

(State or other jurisdiction of incorporation or organization of the issuing entity)

47-1127194

47-1138900

47-6309337

(I.R.S. Employer Identification No.)

c/o U.S. Bank National Association

190 S. LaSalle Street 7th Floor Chicago, Illinois 60603

(Address of principal executive offices of issuing entity)

(312) 332-7464

Registrant’s telephone number, including area code

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

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

Securities registered pursuant to Section 12(g) of 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 every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

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 has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☐

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.

Not Applicable

Indicate the number of shares outstanding of each of the registrant’s classes of common stock, as of the last 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

1. Effective as of March 1, 2025, Trimont LLC succeeded to Wells Fargo Bank, National Association in its capacity as master servicer under the CGCMT 2014-GC21 PSA, as disclosed in the Current Report on Form 8-K filed on March 3, 2025 under Commission File No. 333-189017-04.

2. The Greene Town Center mortgage loan, which represented approximately 4.5% of the initial pool balance of the issuing entity, is part of a loan combination comprised of the subject mortgage loan included in the issuing entity and a pari passu companion loan that is held outside the issuing entity. The Greene Town Center mortgage loan and the related companion loan are serviced pursuant to the GS 2014-GC20 PSA.

3. Pursuant to Instruction 3 to Item 1122 of Regulation AB, the reports on assessment of compliance with servicing criteria and attestation reports on assessment of compliance with servicing criteria of (i) KeyBank National Association, as master servicer under the GS 2014-GC20 PSA pursuant to which the Greene Towne Center mortgage loan is serviced and (ii) Trimont Real Estate Advisors, Inc., as operating advisor for the Greene Towne Center mortgage loan under the GS 2014-GC20 PSA, are not included in this report on Form 10-K because each of KeyBank National Association and Trimont Real Estate Advisors, Inc. performed activities that address the servicing criteria specified in Item 1122(d) of Regulation AB with respect to 5% or less of the pool assets of the issuing entity. This annual report on Form 10-K does not include the report on assessment of compliance with servicing criteria and attestation report on assessment of compliance with servicing criteria of Wells Fargo Bank, National Association as certificate administrator under the GS 2014-GC20 PSA, because the certificate administrator under such pooling and servicing agreement does not perform any activities that address the servicing criteria specified in Item 1122(d) of Regulation AB with respect to the issuing entity.

4. This report on Form 10-K does not include the servicer compliance statement of KeyBank National Association, as master servicer under the GS 2014-GC20 PSA pursuant to which the Greene Towne Center mortgage loan is serviced, because KeyBank National Association is an unaffiliated party that services less than 10% of the pool assets of the issuing entity, and therefore is not a “servicer” that meets the criteria in Item 1108(a)(2)(i) through (iii) of Regulation AB. This annual report on Form 10-K does not include the servicer compliance statement of Wells Fargo Bank, National Association, as certificate administrator under the GS 2014-GC20 PSA, because the certificate administrator under the GS 2014-GC20 PSA is not a “servicer” that meets the criteria in Item 1108(a)(2)(i) through (iii) of Regulation AB with respect to the issuing entity.

PART I

Item 1. Business.

Omitted.

Item 1A. Risk Factors.

Omitted.

Item 1B. Unresolved Staff Comments.

None.

Item 1C. Cybersecurity.

Omitted.

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 Operation.

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.

Item 9C. Disclosure regarding Foreign Jurisdictions that Prevent Inspections.

Not applicable.

PART III

Item 10. Directors and 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 REQUIRED BY GENERAL INSTRUCTION J(2)

Item 1112(b) of Regulation AB.

The mortgaged property securing the Maine Mall mortgage loan constitutes a significant obligor within the meaning of Item 1101(k)(2) of Regulation AB and as disclosed in the Prospectus Supplement for Citigroup Commercial Mortgage Trust 2014-GC21 filed on May 22, 2014. With respect to the mortgaged property securing the Maine Mall mortgage loan, the unaudited net operating income was $17,905,152.98 for the period January 1, 2025 through December 31, 2025.

Item 1114(b)(2) and Item 1115(b) of Regulation AB.

No entity or group of affiliated entities provides any external credit enhancement, uses any derivative instruments or other support for the certificates within this transaction.

Item 1117 of Regulation AB.

Disclosure from U.S. Bank National Association, as Trustee and Certificate Administrator:

U.S. Bank National Association (“U.S. Bank”) and other large financial institutions have been sued in their capacity as trustee or successor trustee for certain residential mortgage backed securities (“RMBS”) trusts. The complaints, primarily filed by investors or investor groups against U.S. Bank and similar institutions, allege the trustees caused losses to investors as a result of alleged failures by the sponsors, mortgage loan sellers and servicers to comply with the governing agreements for these RMBS trusts. Plaintiffs generally assert causes of action based upon the trustees’ purported failures to enforce repurchase obligations of mortgage loan sellers for alleged breaches of representations and warranties, notify securityholders of purported events of default allegedly caused by breaches of servicing standards by mortgage loan servicers and abide by a heightened standard of care following alleged events of default.

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, that it has meritorious defenses, and it has contested and intends to continue contesting the plaintiffs’ claims vigorously. However, 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.

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

U.S. Bank has filed a motion seeking dismissal of the operative complaint in its entirety with prejudice pursuant to Chancery Court Rules 12(b)(1) and 12(b)(6) or, in the alternative, a stay of the case while other prior filed disputes involving the DSTs and the Student Loans are litigated. On November 7, 2018, the Court ruled that the case should be stayed in its entirety pending resolution of the first-filed cases. On January 21, 2020, the Court entered an order consolidating for pretrial purposes the NCMSLT Action and three other lawsuits pending in the Delaware Court of Chancery concerning the DSTs and the Student Loans, which remains pending.

U.S. Bank denies liability in the NCMSLT Action and believes it has performed its obligations as indenture trustee and special servicer in good faith and in compliance in all material respects with the terms of the agreements governing the DSTs and that it has meritorious defenses. It has contested and intends to continue contesting the plaintiffs’ claims vigorously.

Item 1119 of Regulation AB.

Provided previously in the prospectus supplement of the Registrant relating to the issuing entity and filed on May 22, 2014 pursuant to Rule 424(b)(5) of the Securities Act of 1933, as amended.

Item 1122 of Regulation AB.

The reports on assessment of compliance with servicing criteria for asset-backed securities and related attestation reports are attached hereto under Item 15.

Item 1123 of Regulation AB.

The servicer compliance statements are attached hereto under Item 15.

PART IV

Item 15. Exhibits, Financial Statement Schedules.

(a) List the following documents filed as a part of the report:

(1) Not applicable

(2) Not applicable

(3) Exhibits listed below are either included or incorporated by reference as indicated below:

Exhibit
Number

Description.

4.1

Pooling and Servicing Agreement, dated as of May 1, 2014 (the “CGCMT 2014-GC21 PSA”), between Citigroup Commercial Mortgage Securities Inc., as depositor, Trimont LLC (as successor to Wells Fargo Bank, National Association), as master servicer, LNR Partners, LLC, as special servicer, U.S. Bank National Association, as certificate administrator and trustee, and Park Bridge Lender Services LLC, as operating advisor (filed as Exhibit 4.1 to the registrant’s Current Report on Form 8-K dated May 22, 2014, and filed by the registrant on May 22, 2014 under Commission File No. 333-189017-04, and is incorporated by reference herein). (see Explanatory Note #1)

4.2

Pooling and Servicing Agreement, dated as of April 1, 2014 (the “GS 2014-GC20 PSA”), between GS Mortgage Securities Corporation II, as depositor, KeyBank National Association, as master servicer, LNR Partners, LLC, as special servicer, Wells Fargo Bank, National Association, as trustee and certificate administrator, and Trimont Real Estate Advisors, Inc., as operating advisor (filed as Exhibit 4.3 to the registrant’s Current Report on Form 8-K dated May 22, 2014, and filed by the registrant on May 22, 2014 under Commission File No. 333-189017-04, and is incorporated by reference herein). (see Explanatory Note #2)

10.1

Mortgage Loan Purchase Agreement, dated as of May 1, 2014, between Citigroup Global Markets Realty Corp. and Citigroup Commercial Mortgage Securities Inc., pursuant to which Citigroup Global Markets Realty Corp. sold certain mortgage loans to Citigroup Commercial Mortgage Securities Inc. (filed as Exhibit 10.1 to the registrant’s Current Report on Form 8-K dated May 22, 2014, and filed by the registrant on May 22, 2014 under Commission File No. 333-189017-04, and is incorporated by reference herein).

10.2

Mortgage Loan Purchase Agreement, dated as of May 1, 2014, between Goldman Sachs Mortgage Company and Citigroup Commercial Mortgage Securities Inc., pursuant to which Goldman Sachs Mortgage Company sold certain mortgage loans to Citigroup Commercial Mortgage Securities Inc. (filed as Exhibit 10.2 to the registrant’s Current Report on Form 8-K dated May 22, 2014, and filed by the registrant on May 22, 2014 under Commission File No. 333-189017-04, and is incorporated by reference herein).

10.3

Mortgage Loan Purchase Agreement, dated as of May 1, 2014, between Cantor Commercial Real Estate Lending, L.P. and Citigroup Commercial Mortgage Securities Inc., pursuant to which Cantor Commercial Real Estate Lending, L.P. sold certain mortgage loans to Citigroup Commercial Mortgage Securities Inc. (filed as Exhibit 10.3 to the registrant’s Current Report on Form 8-K dated May 22, 2014, and filed by the registrant on May 22, 2014 under Commission File No. 333-189017-04, and is incorporated by reference herein).

10.4

Mortgage Loan Purchase Agreement, dated as of May 1, 2014, between MC-Five Mile Commercial Mortgage Finance LLC and Citigroup Commercial Mortgage Securities Inc., pursuant to which MC-Five Mile Commercial Mortgage Finance LLC sold certain mortgage loans to Citigroup Commercial Mortgage Securities Inc. (filed as Exhibit 10.4 to the registrant’s Current Report on Form 8-K dated May 22, 2014, and filed by the registrant on May 22, 2014 under Commission File No. 333-189017-04, and is incorporated by reference herein).

10.5

Mortgage Loan Purchase Agreement, dated as of May 1, 2014, between RAIT Funding, LLC and Citigroup Commercial Mortgage Securities Inc., pursuant to which RAIT Funding, LLC sold certain mortgage loans to Citigroup Commercial Mortgage Securities Inc. (filed as Exhibit 10.5 to the registrant’s Current Report on Form 8-K dated May 22, 2014, and filed by the registrant on May 22, 2014 under Commission File No. 333-189017-04, and is incorporated by reference herein).

10.6

Mortgage Loan Purchase Agreement, dated as of May 1, 2014, between Redwood Commercial Mortgage Corporation and Citigroup Commercial Mortgage Securities Inc., pursuant to which Redwood Commercial Mortgage Corporation sold certain mortgage loans to Citigroup Commercial Mortgage Securities Inc. (filed as Exhibit 10.6 to the registrant’s Current Report on Form 8-K dated May 22, 2014, and filed by the registrant on May 22, 2014 under Commission File No. 333-189017-04, and is 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. (see Explanatory Note #3)

33.1

Report on assessment of compliance with servicing criteria for asset-backed securities, Wells Fargo Bank, National Association, as master servicer prior to March 1, 2025

33.2

Trimont LLC, as master servicer on and after March 1, 2025

33.3	Report on assessment of compliance with servicing criteria for asset-backed securities, LNR Partners, LLC, as special servicer

33.4	Report on assessment of compliance with servicing criteria for asset-backed securities, Park Bridge Lender Services LLC, as operating advisor

33.5	Report on assessment of compliance with servicing criteria for asset-backed securities, U.S. Bank National Association, as certificate administrator and trustee

33.6	Report on assessment of compliance with servicing criteria for asset-backed securities, CoreLogic Solutions, LLC, as servicing function participant

33.7	Report on assessment of compliance with servicing criteria for asset-backed securities, LNR Partners, LLC, as special servicer for the Greene Town Center mortgage loan under the GS 2014-GC20 PSA (see Exhibit 33.3)

33.8	Report on assessment of compliance with servicing criteria for asset-backed securities, Wells Fargo Bank, National Association, as trustee under the GS 2014-GC20 PSA pursuant to which the Greene Town Center mortgage loan is serviced

33.9	Report on assessment of compliance with servicing criteria for asset-backed securities, Computershare Trust Company, National Association, as agent for Wells Fargo Bank, National Association, as trustee under the GS 2014-GC20 PSA pursuant to which the Greene Town Center mortgage loan is serviced

33.10	Report on assessment of compliance with servicing criteria for asset-backed securities, Wells Fargo Bank, National Association, as custodian for the Greene Town Center mortgage loan under the GS 2014-GC20 PSA

33.11	Report on assessment of compliance with servicing criteria for asset-backed securities, Computershare Trust Company, National Association, as agent for Wells Fargo Bank, National Association, as custodian for the Greene Town Center mortgage loan under the GS 2014-GC20 PSA

34	Attestation reports on assessment of compliance with servicing criteria for asset-backed securities. (see Explanatory Note #3)

34.1

Attestation report on assessment of compliance with servicing criteria for asset-backed securities, Wells Fargo Bank, National Association, as master servicer prior to March 1, 2025

34.2

Attestation report on assessment of compliance with servicing criteria for asset-backed securities, Trimont LLC, as master servicer on and after March 1, 2025

34.3	Attestation report on assessment of compliance with servicing criteria for asset-backed securities, LNR Partners, LLC, as special servicer

34.4	Attestation report on assessment of compliance with servicing criteria for asset-backed securities, Park Bridge Lender Services LLC, as operating advisor

34.5	Attestation report on assessment of compliance with servicing criteria for asset-backed securities, U.S. Bank National Association, as certificate administrator and trustee

34.6	Attestation report on assessment of compliance with servicing criteria for asset-backed securities, CoreLogic Solutions, LLC, as servicing function participant

34.7	Attestation report on assessment of compliance with servicing criteria for asset-backed securities, LNR Partners, LLC, as special servicer for the Greene Town Center mortgage loan under the GS 2014-GC20 PSA (see Exhibit 34.3)

34.8	Attestation report on assessment of compliance with servicing criteria for asset-backed securities, Wells Fargo Bank, National Association, as trustee under the GS 2014-GC20 PSA pursuant to which the Greene Town Center mortgage loan is serviced

34.9	Attestation report on assessment of compliance with servicing criteria for asset-backed securities, Computershare Trust Company, National Association, as agent for Wells Fargo Bank, National Association, as trustee under the GS 2014-GC20 PSA pursuant to which the Greene Town Center mortgage loan is serviced

34.10	Attestation report on assessment of compliance with servicing criteria for asset-backed securities, Wells Fargo Bank, National Association, as custodian for the Greene Town Center mortgage loan under the GS 2014-GC20 PSA

34.11	Attestation report on assessment of compliance with servicing criteria for asset-backed securities, Computershare Trust Company, National Association, as agent for Wells Fargo Bank, National Association, as custodian for the Greene Town Center mortgage loan under the GS 2014-GC20 PSA

35	Servicer compliance statements. (see Explanatory Note #4)

35.1

Servicer compliance statement, Wells Fargo Bank, National Association, as master servicer prior to March 1, 2025

35.2

Servicer compliance statement, Trimont LLC, as master servicer on and after March 1, 2025

35.3	Servicer compliance statement, LNR Partners, LLC, as special servicer

35.4	Servicer compliance statement, U.S. Bank National Association, as certificate administrator

35.5	Servicer compliance statement, LNR Partners, LLC, as special servicer for the Greene Town Center mortgage loan under the GS 2014-GC20 PSA

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

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.

Date: March 27, 2026

Citigroup Commercial Mortgage Securities Inc.

(Depositor)

/s/ Richard Simpson

Name: Richard Simpson

Title: President

Citigroup Commercial Mortgage Trust 2014-GC21 10-K