UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K/A

Amendment No. 1

(Mark One)

For the fiscal year ended December 31, 2012

- OR -

For the transition period from                      to                     

Commission file number 333-182948

TRANSUNION HOLDING COMPANY, INC.

(Exact name of registrant as specified in its charter)

312-985-2000

(Registrant’s telephone number, including area code)

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 Exchange Act (“Act”).    ¨  YES    x  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    x  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 at least the past 90 days. (Note: From the effectiveness of the registrant’s Registration Statement on Form S-4 (File No. 333-182948) on September 6, 2012 until December 31, 2012, the registrant was subject to the filing requirements of Section 13 or 15(d) of the Exchange Act. On January 1, 2013, the registrant’s reporting obligations were automatically suspended pursuant to Section 15(d). As a voluntary filer the registrant filed all reports required to be filed by Section 13 or 15(d) of the Exchange Act during the preceding 12 months (or for such shorter period that the registrant would have been required to file such reports) as if it were subject to such filing requirements).    x  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 (§ 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).    x  YES    ¨  NO

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§ 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.    x

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See definition of “large accelerated filer”, “accelerated filer” and “smaller reporting company” in Rule 12b-2 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    x  NO

As of June 30, 2012, there was no established public market for TransUnion Holding Company, Inc. common stock, par value $0.01 per share.

As of January 31, 2013, there were 109,807,128 shares of TransUnion Holding Company, Inc. common stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

None

TransUnion Holding Company, Inc.

Form 10-K/A

Explanatory Note

This Amendment No. 1 to the annual report of TransUnion Holding Company, Inc. (the “Company”) on Form 10-K/A amends our annual report on Form 10-K for the year ended December 31, 2012 (the “Original 10-K”), which was originally filed on February 25, 2013. We previously filed our annual report on a combined basis with TransUnion Corp. because we operate the Company and TransUnion Corp. as one business with identical management teams. However, this amendment only relates to the Company because the obligation under Rule 3-09 of Regulation S-X to file the separate financial statements referenced below only arises with respect to the Company, and not TransUnion Corp.

We are filing this amendment to amend Item 15 of the original 10-K to provide the separate audited financial statements in accordance with Rule 3-09 of Regulation S-X for Trans Union De Mexico, S.A. for the year ended December 31, 2012 (Exhibit 99.1), and for Credit Information Bureau (India) Limited for the year ended March 31, 2012 (Exhibit 99.2). These financial statements, which were not available prior to the original filing date, have been prepared and provided by management of each respective company. Management of each respective company is solely responsible for the form and content of their financial statements.

This Form 10-K/A also includes the currently dated signature page and certifications from the Company’s principal executive officer and principal financial officer. This Amendment No. 1 does not reflect subsequent events occurring after the original filing date of the Original 10-K or modify or update in any way disclosures made in the Original 10-K except as noted above. This Amendment No. 1 should be read in conjunction with the Original 10-K and with other Company filings with the Securities and Exchange Commission subsequent to the filing of the Original 10-K.

PART IV

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, on April 8, 2013.

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities indicated on April 8, 2013

2012 Form 10-K

EXHIBIT INDEXⁱ

TransUnion Holding Company, Inc.