OA Orbital Atk, Inc. (delisted)

If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates:

PART I — REGISTRANT INFORMATION

PART II — RULES 12b-25(b) AND (c)

If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed. (Check box if appropriate)

PART III — NARRATIVE

State below in reasonable detail why Forms 10-K, 20-F, 11-K, 10-Q, 10-D, N-SAR, N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period.

Orbital ATK, Inc. (the “Company”) is unable to file its Quarterly Report on Form 10-Q for the period ended July 3, 2016 within the prescribed time period without unreasonable effort or expense because of the circumstances described below.

As reported in the Company’s Item 4.02(a) Current Report on Form 8-K filed on August 10 2016, the Audit Committee of the Board of Directors (the “Audit Committee”) of the Company, after considering the recommendation of management, concluded on August 8, 2016 that the Company’s previously issued financial statements for the fiscal year ended March 31, 2015 (“fiscal 2015”), the nine-month transition period ended December 31, 2015 (“2015 transition period”), the quarters in fiscal 2015 and the 2015 transition period, and the quarter ended April 3, 2016 (the “Restated Periods”), should no longer be relied upon.  The Company is still evaluating whether financial statements from annual and quarterly periods prior to fiscal 2015 can continue to be relied upon.  The Company expects to restate (the “Restatement”) the financial statements for the Restated Periods. An explanation of the underlying cause of the Restatement is included in the above referenced Current Report on Form 8-K.

The Company intends to amend its Transition Report on Form 10-K for the 2015 transition period and its Quarterly Report on Form 10-Q for the quarter ended April 3, 2016, as soon as reasonably practicable.  The Company may determine to amend the Forms 10-Q for the quarterly periods ended June 29, 2014, September 28, 2014, December 28, 2014, July 5, 2015 and October 4, 2015 or to include the restated financial statements for those interim periods in its amended Form 10-K for the 2015 transition period.  The Company believes that the misstatements that caused the Restatement indicate the existence of one or more material weaknesses in its internal control over financial reporting and disclosure controls and procedures during the Restated Periods.  The Company will report those material weaknesses in its amended reports and in its Quarterly Report on Form 10-Q for the quarter ended July 3, 2016.

The Company is continuing to review and assess the matters described in the above referenced Current Report on Form 8-K with the assistance of outside professionals.  In view of the ongoing work in this regard, the Company will not file its quarterly report for the quarter ended July 3, 2016 by August 17, 2016, which is the deadline for the extended filing period pursuant to Rule 12b-25.

Forward Looking Statements

Certain matters discussed in this filing constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements are based on management’s current beliefs, assumptions and expectations regarding future events, which in turn are based on information currently available to management. Such forward-looking statements include statements regarding materiality or significance, the quantitative effects of the restated and other financial statements, and the timing of the filing of the Company’s second quarter 2016 Form 10-Q and the amended Form 10-K  and any other reports that will include the Restatement. The Company cautions you not to place undue reliance on any such forward-looking statements. Several factors could cause actual results, as well as the Company’s expectations regarding materiality or significance, the Restatement’s quantitative effects, and the effectiveness of the Company’s internal control over financial reporting and disclosure controls and procedures, to differ materially from those expressed in or contemplated by the forward-looking statements. Such factors include, but are not limited to, the fact that the Company is continuing to review the misstatements and other matters described above and the Company’s analysis is still preliminary, the risk that additional information may arise or different conclusions are reached prior to the expected filing with the Securities and Exchange Commission (“SEC”) of the contemplated filings, the preparation of the Company’s restated financial statements or other subsequent events that would require us to make additional adjustments, as well as inherent limitations in internal controls over financial reporting.  Other risk factors affecting the Company are discussed in detail in the Company’s filings with the SEC, including its Annual Reports on Form 10-K. The Company undertakes no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events or otherwise, except as may be required by law.