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:		Commission File Number:
December 31, 2025		001-32075

	STRUCTURED PRODUCTS CORP.,
	on behalf of

	TIERS Principal-Protected Certificates Trust Series FFH 2001-12

	(Exact name of registrant as specified in its charter)

Delaware		13-3692801
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification No.)

	388 Greenwich Street
	New York, New York 10013
	(Address of principal executive offices) (zip code)


Registrant's telephone number including area code:		212-723-4070


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


Title of Each Class	Trading Symbol(s)	Name of Each Exchange on Which Registered

TIERS Principal-Protected Trust Certificates, Series FFH 2001-12	TIERS37A	New York Stock Exchange

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 have filed 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).
	Yes ☒ No ☐
	[Rule 405 of Regulation S-T is 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 ☒
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.☐ If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐ Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant's executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐
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.

As of the date of this report, all of the common stock of the Registrant is held by Citigroup Global Markets Holdings Inc.

Documents Incorporated by Reference

The distribution reports to security holders filed on Form 8-K during the fiscal year in lieu of reports on Form 10‑Q, which includes the reports filed on Form 8-K listed in Item 15(b) hereto.

Introductory Note

Structured Products Corp. (the “Depositor”) is the depositor under the Base Trust Agreement, dated as of May 21, 1999, as supplemented by the TIERS Supplement 2001-12, dated as of May 25, 2001, by and between the Depositor and U.S. Bank Trust National Association, as Trustee (the “Trustee”), providing for the issuance of the TIERS Principal-Protected Trust Certificates, Series FFH 2001-12 (the “Certificates”) and is the depositor for the Certificates (the “Registrant”). The Certificates do not represent obligations of or interests in the Depositor or the Trustee.

The issuer(s) of the underlying securities, or guarantor thereof, or successor thereto, as applicable, is subject to the information reporting requirements of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). For information on the issuer(s) of the underlying securities, or guarantor thereof, or successor thereto, as applicable, please see its periodic and current reports filed with the Securities and Exchange Commission (the “Commission”). Such reports and other information required to be filed pursuant to the Exchange Act, by the issuer(s) of the underlying securities, or guarantor thereof, or successor thereto, as applicable, may be inspected and copied at the public reference facilities maintained by the Commission at 450 Fifth Street, N.W., Washington, D.C. 20549. The Commission also maintains a site on the World Wide Web at “http://www.sec.gov” at which users can view and download copies of reports, proxy and information statements and other information filed electronically through the Electronic Data Gathering, Analysis and Retrieval system, or “EDGAR.” Neither the Depositor nor the Trustee has participated in the preparation of such reporting documents, or made any due diligence investigation with respect to the information provided therein. Neither the Depositor nor the Trustee has verified the accuracy or completeness of such documents or reports. There can be no assurance that events affecting the issuer(s) of the underlying securities, or guarantor thereof, or successor thereto, as applicable, or the underlying securities have not occurred or have not yet been publicly disclosed that would affect the accuracy or completeness of the publicly available documents described above. The chart below lists each trust, the issuer(s) or guarantor, or successor thereto, of the related underlying security, and its respective Exchange Act file numbers, if applicable.

	Underlying Securities Issuer(s) or Guarantor, or successor thereto	Exchange Act File Number
	Fairfax Financial Holdings Limited United States Treasury Obligations	001-31556 Not Applicable

PART I

Item 1.	Business

	None.

Item 1A.	Risk Factors

	None.

Item 1B.	Unresolved Staff Comments

	None.

Item 1C.	Cybersecurity

	Not Applicable.

Item 2.	Properties

	None.

Item 3.	Legal Proceedings

	None.

Item 4.	Mine Safety Disclosures

	None.

PART II

Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

	The Certificates representing investors’ interest in the Trust are represented by one or more physical Certificates registered in the name of Cede & Co., the nominee of The Depository Trust Company.

	The Certificates are listed on the New York Stock Exchange.

Item 6.	[Reserved]

Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations

	Not Applicable.

Item 7A.	Quantitative and Qualitative Disclosures About Market Risk

	None.

Item 8.	Financial Statements and Supplementary Data

	None.

Item 9.	Changes In and Disagreements With Accountants on Accounting and Financial Disclosure

	None.

Item 9A.	Controls and Procedures

	Not applicable.

Item 9B.	Other Information

	None.

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

	Not Applicable

PART III

Item 10.	Directors, Executive Officers and Corporate Governance

	None.

Item 11.	Executive Compensation

	Not Applicable.

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

	Information required by Item 201(d) of Regulation S-X: Not applicable.
	Information required by Item 403 of Regulation S-X: None.

Item 13.	Certain Relationships and Related Transactions, and Director Independence

	None.

Item 14.	Principal Accounting Fees and Services

	Not Applicable.

PART IV

Item 15.		Exhibits, Financial Schedules and Reports on Form 8-K

(a)	The following documents are also filed as part of this Report:

	3.	Exhibits:

		31.1	Certification by President of the Registrant pursuant to 15 U.S.C. Section 7241, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

		97.1	Structured Products Corp. Dodd-Frank Clawback Provisions.

		99.1	Annual Compliance Report by Trustee.

(b)	The following reports on Form 8-K were filed during the period covered by this report and are hereby incorporated by reference:

	1.	Trustee’s Distribution Statement for the January 15, 2025 Distribution Date filed on Form 8‑K on January 28, 2025.
	2.	Trustee’s Distribution Statement for the July 15, 2025 Distribution Date filed on Form 8‑K on July 29, 2025.

(c)	See item 15(a)(3) above.

Item 16.	Form 10-K Summary

	None.

EXHIBIT INDEX

Exhibit		Page
31.1	Certification by President of the Registrant pursuant to 15 U.S.C. Section 7241, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

97.1	Structured Products Corp. Dodd-Frank Clawback Provisions.

99.1	Annual Compliance Report by Trustee pursuant to 15 U.S.C. Section 7241.

STRUCTURED PRODUCTS CORP TIERS PRI PRO CER TR SE FFH 2001-12 10-K