10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

ý	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended October 2, 2016
OR
o	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 1-10582

ORBITAL ATK, INC.

(Exact name of Registrant as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization)	41-1672694 (I.R.S. Employer Identification No.)
45101 Warp Drive
Dulles, Virginia	20166
(Address of principal executive offices)	(Zip Code)

Registrant's telephone number, including area code:(703) 406-5000

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 o    No ý

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). Yes o    No ý

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 the definitions of "large accelerated filer," "accelerated filer," and "smaller reporting company" in Rule 12b-2 of the Exchange Act.

Large Accelerated Filer ý Accelerated Filer o Non-Accelerated Filer o (Do not check if a smaller reporting company) Smaller reporting company o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o    No ý

As of April 5, 2017, there were 57,653,024 shares of the registrant's common stock outstanding.

TABLE OF CONTENTS

		Page
PART I - Financial Information
Item 1.	Financial Statements	2
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	27
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	38
Item 4.	Controls and Procedures	38
PART II- Other Information
Item 1.	Legal Proceedings	42
Item 1A.	Risk Factors	43
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	43
Item 3.	Defaults Upon Senior Securities	43
Item 4.	Mine Safety Disclosures	43
Item 5.	Other Information	43
Item 6.	Exhibits	44
SIGNATURES		45

PART I— FINANCIAL INFORMATION

ITEM 1.    FINANCIAL STATEMENTS

ORBITAL ATK, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(unaudited)

	Quarters Ended						Nine Months Ended
(Amounts in thousands except per share data)	October 2, 2016			October 4, 2015			October 2, 2016			October 4, 2015
				(As Restated) (1)
Sales	$	1,043,702		$	1,143,246		$	3,183,442		$	3,217,974
Cost of sales	833,403			934,429			2,466,496			2,563,023
Gross profit	210,299			208,817			716,946			654,951
Operating expenses:
Research and development	24,887			28,666			80,418			78,698
Selling	28,099			28,137			82,140			81,549
General and administrative	66,337			65,204			195,388			268,442
Goodwill impairment	—			—			—			34,300
Gain on settlement	—			50,000			—			50,000
Income from continuing operations, before interest, income taxes and noncontrolling interest	90,976			136,810			359,000			241,962
Net interest expense	(17,614		)	(24,636		)	(51,193		)	(61,171		)
Loss on extinguishment of debt	—			—			—			(26,626		)
Income from continuing operations, before income taxes and noncontrolling interest	73,362			112,174			307,807			154,165
Income taxes	13,181			37,980			79,765			61,563
Income from continuing operations, before noncontrolling interest	60,181			74,194			228,042			92,602
Less net (loss) income attributable to noncontrolling interest	(135		)	147			(311		)	72
Income from continuing operations of Orbital ATK, Inc.	60,316			74,047			228,353			92,530
Discontinued operations:
Income from discontinued operations, before income taxes	—			—			—			17,504
Income taxes	—			—			—			667
Income from discontinued operations	—			—			—			16,837
Net income attributable to Orbital ATK, Inc.	$	60,316		$	74,047		$	228,353		$	109,367
Basic earnings per common share from:
Continuing operations	$	1.04		$	1.26		$	3.92		$	1.69
Discontinued operations	—			—			—			0.31
Net income attributable to Orbital ATK, Inc.	$	1.04		$	1.26		$	3.92		$	2.00
Weighted-average number of common shares outstanding	57,927			58,746			58,213			54,807
Diluted earnings per common share from:
Continuing operations	$	1.04		$	1.25		$	3.89		$	1.68
Discontinued operations	—			—			—			0.30
Net income attributable to Orbital ATK, Inc.	$	1.04		$	1.25		$	3.89		$	1.98
Weighted-average number of diluted common shares outstanding	58,257			59,304			58,642			55,228
Cash dividends per common share	$	0.30		$	0.26		$	0.90		$	0.84
Comprehensive income (loss):
Net income attributable to Orbital ATK, Inc. and noncontrolling interest	$	60,181		$	74,194		$	228,042		$	109,439
Comprehensive income (Loss):
Pension and other postretirement benefit liabilities:
Reclassification of prior service credits for pension and postretirement benefit plans recorded to net income, net of tax (expense) benefit of $(12,500) and $2,691, $(7,547) and $8,258, respectively	20,215			(4,335		)	12,284			(13,291		)
Reclassification of net actuarial loss for pension and postretirement benefit plans recorded to net income, net of tax (expense) of $(11,146), $(14,196), $(35,578) and $(2,245), respectively	17,861			22,870			56,968			4,328
Valuation adjustment for pension and postretirement benefit plans, net of tax (expense) benefit of $0, $0, $(648) and $139,583, respectively	—			—			1,025			(224,389		)
Change in fair value of derivatives, net of tax (expense) benefit of $(563), $1,896, $(2,097) and $1,276 respectively	890			(2,996		)	3,315			(2,032		)
Other, net of tax (expense) benefit of $(190), $55, $(292) and $93, respectively	472			(88		)	1,076			(153		)
Change in cumulative translation adjustment, net of tax (expense) of $(9,650)	—			—			—			(21,381		)
Total other comprehensive income (loss)	39,438			15,451			74,668			(256,918		)
Comprehensive income (loss)	99,619			89,645			302,710			(147,479		)
Less comprehensive (loss) income attributable to noncontrolling interest	(135		)	147			(311		)	72
Comprehensive income (loss) attributable to Orbital ATK, Inc.	$	99,754		$	89,498		$	303,021		$	(147,551	)

⁽¹⁾See Note 3 - Restatement

See Notes to the Condensed Consolidated Financial Statements.

2

ORBITAL ATK, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(unaudited)

(Amounts in thousands except share data)	October 2, 2016			December 31, 2015
ASSETS
Current assets:
Cash and cash equivalents	$	63,011		$	104,032
Net receivables	1,864,826			1,670,821
Net inventories	230,087			213,212
Income taxes receivable	335			50,769
Other current assets	86,081			89,645
Total current assets	2,244,340			2,128,479
Net property, plant and equipment	769,450			761,694
Goodwill and net intangibles	1,940,635			1,975,522
Other noncurrent assets	411,667			458,000
Total assets	$	5,366,092		$	5,323,695
LIABILITIES AND EQUITY
Current liabilities:
Current portion of long-term debt	$	40,000		$	40,000
Accounts payable	170,756			130,812
Accrued compensation	117,790			127,928
Contract loss reserve	200,569			235,841
Other current liabilities	623,465			719,854
Total current liabilities	1,152,580			1,254,435
Long-term debt	1,542,642			1,435,836
Pension and other postretirement benefits	699,162			820,834
Other noncurrent liabilities	119,974			127,152
Total liabilities	3,514,358			3,638,257
Commitments and contingencies (Notes 13 and 16)
Common stock—$.01 par value: authorized—180,000,000 shares; issued and outstanding— 57,892,300 shares at October 2, 2016 and 58,729,995 shares at December 31, 2015	579			587
Additional paid-in-capital	2,173,099			2,187,940
Retained earnings	1,218,814			1,043,043
Accumulated other comprehensive loss	(711,209		)	(785,908		)
Common stock in treasury, at cost—11,042,724 shares held at October 2, 2016 and 10,205,029 shares held at December 31, 2015	(840,042		)	(771,029		)
Total Orbital ATK, Inc. stockholders' equity	1,841,241			1,674,633
Noncontrolling interest	10,493			10,805
Total equity	1,851,734			1,685,438
Total liabilities and equity	$	5,366,092		$	5,323,695

See Notes to the Condensed Consolidated Financial Statements.

3

ORBITAL ATK, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited)

	Nine Months Ended
(Amounts in thousands)	October 2, 2016			October 4, 2015
Operating Activities
Net income	$	228,042		$	109,439
Net loss from discontinued operations	—			(16,837		)
Income from continuing operations	228,042			92,602
Adjustments to reconcile income from continuing operations to cash provided by operating activities of continuing operations:
Depreciation and amortization	120,251			120,816
Amortization and write-off of deferred financing costs	1,806			12,481
Fixed asset impairment	4,809			14,833
Deferred income taxes	(12,110		)	(25,254		)
Goodwill impairment	—			34,300
Loss on the extinguishment of debt	—			26,626
Stock-based plans expense	17,516			28,369
Other	8,641			(2,884		)
Change in assets and liabilities:
Net receivables	(203,151		)	19,407
Net inventories	(22,575		)	36,644
Income taxes receivable	50,434			37,388
Accounts payable	39,373			32,834
Contact loss reserve	(23,754		)	(37,368		)
Accrued compensation	(6,902		)	3,924
Pension and other postretirement benefits	(7,622		)	1,693
Other assets and liabilities	(88,146		)	(120,030		)
Cash flows provided by operating activities of continuing operations	106,612			276,381
Cash flows provided by operating activities of discontinued operations	—			10,741
Cash flows provided by operating activities	106,612			287,122
Investing Activities
Capital expenditures	(105,535		)	(104,767		)
Cash acquired in Merger with Orbital	—			253,734
Cash dividend received from Vista Outdoor, net of cash transferred to Vista Outdoor in conjunction with the Distribution of Sporting Group	—			188,878
Other	—			145
Cash flows (used in) provided by investing activities of continuing operations	(105,535		)	337,990
Cash flows provided by investing activities of discontinued operations	—			49
Cash flows (used in) provided by investing activities	(105,535		)	338,039
Financing Activities
Borrowings on revolving credit facilities	800,000			723,000
Payments on revolving credit facilities	(665,000		)	(773,000		)
Payment of long-term debt	(30,000		)	(44,998		)
Payments made to extinguish debt	—			(1,746,260		)
Proceeds from issuance of debt	—			1,287,000
Payments made for debt issuance costs	—			(9,078		)
Purchase of treasury shares	(94,992		)	(71,585		)
Dividends paid	(52,586		)	(41,214		)
Other	480			4,481
Cash flows used in financing activities	(42,098		)	(671,654		)
Effect of foreign exchange rate fluctuations on cash	—			(1,340		)
Decrease in cash and cash equivalents	(41,021		)	(47,833		)
Cash and cash equivalents at beginning of period	104,032			112,920
Cash and cash equivalents at end of period	$	63,011		$	65,087
Supplemental Cash Flow Disclosures
Noncash investing and operating activity:
Capital expenditures included in accounts payable	$	3,727		$	5,296
Noncash financing and operating activity:
Debt issuance costs included in accounts payable	$	—		$	819
Treasury shares purchased included in accounts payable	$	2,859		$	2,159

See Notes to the Condensed Consolidated Financial Statements.

4

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

1. Basis of Presentation and Responsibility for Interim Financial Statements

The unaudited condensed consolidated financial statements of Orbital ATK, Inc. ("the Company" or "Orbital ATK") as set forth in this quarterly report have been prepared in accordance with the requirements of the U.S. Securities and Exchange Commission ("SEC") for interim reporting. As permitted under those rules, certain footnotes and other financial information that are normally required by accounting principles generally accepted in the United States can be condensed or omitted. The Company's accounting policies are described in the notes to the consolidated financial statements in its Amended Transition Report on Form 10-K/A ("Form 10-K/A") for the nine-month transition period ended December 31, 2015 filed on February 24, 2017 with the SEC. Management is responsible for the unaudited condensed consolidated financial statements included in this document. The unaudited condensed consolidated financial statements included in this document, in the opinion of management, include all adjustments necessary for a fair statement of the Company’s financial position as of October 2, 2016, its results of operations for the quarter and nine months ended October 2, 2016 and October 4, 2015 and cash flows for the nine months ended October 2, 2016 and October 4, 2015. The condensed consolidated balance sheet as of December 31, 2015 was derived from the audited financial statements included in the Form 10-K/A but does not include all of the information and footnotes required by Generally Accepted Accounting Principles ("U.S. GAAP") for complete financial statements.

On February 9, 2015, the Company completed a tax-free spin-off of and distribution of its former Sporting Group to its stockholders (the "Distribution") as a new public company called Vista Outdoor Inc. ("Vista Outdoor"). Immediately following the Distribution, the Company combined with Orbital Sciences Corporation ("Orbital") through the merger of a Company subsidiary with Orbital (the "Merger"). These transactions are discussed in greater detail in Note 5. Following the Distribution and Merger, the Company changed its name from Alliant Techsystems Inc. to Orbital ATK, Inc.

As a result of the Distribution, Sporting Group is no longer reported within the Company's results from continuing operations but is reported as a discontinued operation for all prior periods presented. The Company used the acquisition method to account for the Merger; accordingly, the results of Orbital have been included in the Company's condensed consolidated financial statements since the date of the Merger.

Following the Distribution and Merger, the Company reorganized its business groups and realigned its reporting segments. The Company's remaining businesses, combined with the businesses of Orbital, are now reported in three segments: Flight Systems Group, Defense Systems Group and Space Systems Group, as discussed in Note 20. The business comprising Sporting Group is presented as a discontinued operation - see Note 5.

Sales, expenses, cash flows, assets and liabilities can and do vary during the year. Therefore, the results and trends in these interim financial statements may not be the same as those for the full year. Certain reclassifications have been made to prior year amounts to conform to current year presentation.

This Form 10-Q should be read in conjunction with the Company's consolidated financial statements and notes included in its Form 10-K/A.

Fiscal Year Change and the presentation of the Nine Months Ended October 4, 2015. On March 10, 2015, the Company's Board of Directors approved a change in the Company's fiscal year end from March 31 to a calendar year ending on December 31 of each year. The Company's interim quarterly periods are based on 13-week periods and ending on the Sunday closest to the last calendar day of each of March, June and September. The Company filed a Transition Report on Form 10-K for the nine-month transition period ended December 31, 2015 on March 15, 2016, which was subsequently amended on February 24, 2017. Information in this document referring to the nine months ended October 4, 2015, includes the Company's restated results for the quarters ended March 31, 2015, July 5, 2015 and the quarter ended October 4, 2015 as disclosed in the Company's Form 10-K/A. Additionally, the restated results for the quarter ended March 31, 2015 were also reported in the Amended Quarterly Report on Form 10-Q for the quarter ended April 3, 2016 (filed with the SEC on April 3, 2017).

Restatement of Previously Issued Unaudited Condensed Consolidated Financial Statements. In this Form 10-Q, the Company has restated its unaudited condensed consolidated statement of comprehensive income for the quarter ended October 4, 2015 as disclosed in the Company’s Form 10-K/A.

2. New Accounting Pronouncements

Accounting Standards Updates Adopted

In March 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2016-09, Compensation-Stock Compensation (Topic 718) Improvements to Employee Share-Based Payment Accounting,

5

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

which requires the recognition of the income tax effects of awards in the income statement when the awards vest or are settled, thus eliminating additional paid in capital pools. The guidance also allows for the employer to repurchase a greater number of an employee's shares for tax withholding purposes without triggering liability accounting. In addition, the guidance allows for a policy election to account for forfeitures as they occur rather than on an estimated basis. The guidance is effective for annual reporting periods beginning after December 15, 2016 with early adoption permitted. The Company elected to early adopt this ASU in the quarter ended April 3, 2016. The adoption of this new standard did not have a material impact on the Company's consolidated financial statements.

In May 2015, the FASB issued ASU 2015-07, Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent), which removes the requirement to categorize within the fair value hierarchy all investments for which fair value is measured using the net asset value per share practical expedient. Such investments should be disclosed separate from the fair value hierarchy. This ASU became effective retrospectively for the Company beginning in the quarter ended April 3, 2016. The adoption of this new standard did not have an impact on the Company's consolidated financial statements but impacted certain disclosures reflected in the notes to the accompanying condensed consolidated financial statements.

In April 2015, the FASB issued ASU No. 2015-03, Simplifying the Presentation of Debt Issuance Costs, and in August 2015, the FASB issued ASU No. 2015-15, Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements. These ASUs more closely align the treatment of debt issuance costs with debt discounts and premiums and requires debt issuance costs to be presented as a direct deduction from the carrying amount of the related debt. The amendments in these ASUs became effective for the Company in the quarter ended April 3, 2016. The adoption of these new standards impacted the presentation of the current and prior period debt issuance costs included in Note 12.

In February 2015, the FASB issued ASU 2015-02, Amendments to the Consolidation Analysis, which simplifies the consolidation evaluation process by placing more emphasis on risk of loss when determining a controlling financial interest. This new standard is effective for interim and annual periods beginning after December 15, 2015. The adoption of this new standard did not have a material impact on the Company's consolidated financial statements.

Accounting Standards Updates Issued But Not Yet Adopted

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which requires recognition of lease assets and lease liabilities for those leases classified as operating leases under previous generally accepted accounting principles in the United States ("U.S. GAAP"). The new standard is effective for annual reporting periods beginning after December 15, 2018 with early adoption permitted. The Company currently is evaluating the potential changes from this ASU to its future financial reporting and disclosures.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), which will replace numerous requirements in U.S. GAAP, including industry-specific requirements, and provide companies with a single revenue recognition model for recognizing revenue from contracts with customers. The core principle of the new standard is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. Under the new standard, the Company expects to continue using the cost-to-cost percentage-of-completion method to recognize revenue for most of its long-term contracts. The two permitted transition methods under the new standard are the full retrospective method, in which case the standard would be applied to each prior reporting period presented, or the modified retrospective method, in which case the cumulative effect of applying the standard would be recognized at the date of initial application. The Company has not yet selected a transition method. The Company currently is evaluating the potential changes from this ASU to its future financial reporting and disclosures. In July 2015, the FASB approved the deferral of the new standard's effective date by one year. The new standard will now be effective for annual reporting periods beginning after December 15, 2017. The FASB will permit companies to adopt the new standard early, but not before the original effective date of annual reporting periods beginning after December 15, 2016.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230), Classification of Certain Cash Receipts and Cash Payments. The guidance clarifies how entities should classify certain cash receipts and cash payments on the statement of cash flows. It addresses eight specific cash flows where there currently exists diversity in the way these cash flows are reported. They are (1) Debt Prepayment or Debt Extinguishment Costs; (2) Settlement of Zero-Coupon Debt Instruments; (3) Contingent Consideration Payments Made after a Business Combination; (4) Proceeds from the Settlement of Insurance Claims; (5) Proceeds from the Settlement of Corporate-Owned Life Insurance (COLI) Policies including Bank-Owned Life Insurance Policies; (6) Distributions Received from Equity Method Investees; (7) Beneficial Interests in Securitization Transactions; and (8) Separately Identifiable Cash Flows and Application of the Predominance Principle. In the absence of

6

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

specific guidance, an entity should classify each separately identifiable cash source and use on the basis of the nature of the underlying cash flows. The guidance also clarifies how the predominance principle should be applied when cash receipts and cash payments have aspects of more than one class of cash flows.

As an example, for item (1) the cash flows will be classified as financing activities; for item (3) contingent payments made soon after the acquisition will be classified as investing activities and financing activities if made thereafter and for item (5) cash payments made to settle COLI policies will be classified as investing activities and premium payments may be classified as cash outflows for investing, operating or a combination of both.

The standard is effective for financial statements issued for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, provided that all of the amendments are adopted in the same period. The guidance requires retrospective application but if it is impracticable to do so for an issue, the amendments related to that issue would be applied prospectively.The Company is still evaluating the provisions of ASU 2016-15 and its impact on the condensed consolidated statement of cash flows.

Other new pronouncements issued but not effective for the Company until after October 2, 2016 are not expected to have a material impact on the Company's continuing financial position, results of operations or liquidity.

3. Restatement

In February 2017, the Company filed the Form 10-K/A to restate its consolidated financial statements for the nine-month transition period ended December 31, 2015 ("2015 transition period"), fiscal year ended March 31, 2015 ("fiscal 2015"), fiscal year ended March 31, 2014 ("fiscal 2014"), the quarters in the 2015 transition period and fiscal 2015 (the "Restatement") to correct errors primarily related to (i) the estimation of contract costs at completion on the long-term contract (the “Lake City Contract”) with the U.S. Army to manufacture and supply small caliber ammunition at the Lake City Army Ammunition Plant ("LCAAP") causing a forward loss provision to not be identified timely and recorded in prior periods; and (ii) correcting the Company’s accounting policy for measurement of forward loss provisions. In this Form 10-Q, the Company restated its unaudited condensed consolidated financial statement of comprehensive income for the quarter ended October 4, 2015 for the consequential impact of these errors.

The Audit Committee of the Board of Directors, in consultation with senior management, determined that the Company should conduct an internal investigation, under its supervision, of the circumstances surrounding the misstatements in the accounting for the Lake City Contract and related matters. The investigation was undertaken by outside counsel, along with independent counsel for the Audit Committee. Counsel received assistance from outside forensic accountants. As disclosed in the Form 10-K/A, the investigation was previously completed.

Based on the internal investigation, the Audit Committee and senior management concluded as follows: Certain personnel at the Small Caliber Systems Division and, in some cases, Defense Systems Group, acted inappropriately and failed to adhere to the high standards established in the Company’s policies and expected by senior management and the Board of Directors. Specifically, with respect to the Lake City Contract: (a) there likely was a bias toward maintaining a targeted profit rate; (b) in some cases, there appears to have been inappropriate use of management reserves to maintain the targeted profit rate; (c) some members of the Small Caliber Systems Division finance staff failed to follow up and inquire further into indicators that cost overruns were occurring, and if such inquiries had been made, it could have led to further contemporaneous discussion and an earlier conclusion that the Lake City Contract was in a forward loss position; and (d) negative information was suppressed, and concerns at the Small Caliber Systems Division about cost overruns were not escalated appropriately to higher-level Company management or finance staff, nor were they communicated to the Audit Committee, the Board of Directors or the independent registered public accounting firms.

The Lake City Contract is within the Small Caliber Systems Division, a business unit within the Company’s Defense Systems Group, and is a fixed price contract accounted for under the percentage-of-completion revenue recognition method. The Lake City Contract was entered into in September 2012. It has an initial term of seven years plus the possibility of an award term extension of an additional three years if by July 17, 2017 the Company does not provide written notice of rejection to the U.S. Army. It is probable that the Company will provide written notice of rejection to the U.S. Army. As a result, the Restatement presents the total estimated forward loss provision for the initial seven-year term.

Management identified that the underlying contract costs estimated at completion for the Lake City Contract in prior periods contained misstatements which, when corrected, resulted in the Lake City Contract’s estimated costs at completion exceeding the contracted revenues. This necessitated a forward loss charge for the seven-year term of the Lake City Contract to be recorded for the entire anticipated forward loss on the contract in the period in which the loss became evident. The Company determined that $31,500 of the loss was evident at contract signing (second quarter of fiscal 2013) and $342,000 became

7

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

evident at the time of initial production (second quarter of fiscal 2014) and restated those periods and the consequential impact in subsequent periods.

Due to the contract loss identified at the Lake City facility, the Company recognized an impairment charge for the long lived assets capitalized for the Lake City Ammunition Plant asset group in fiscal 2014. Subsequent to the impairments, costs incurred for the purchase or construction of additional long-lived assets related to this contract were expensed in the periods incurred, as such costs will not be recovered, and the depreciation expense recorded in subsequent periods was revised. The impairment charge recognized on long lived assets was $8,962, $3,576 and $2,295 in the quarters ended March 31, 2015, July 5, 2015 and October 4, 2015, respectively.

The Company corrected its accounting policy from measurement of a forward loss provision based on gross profit to measurement based on gross profit along with general and administrative costs and adjusted the previously recorded forward loss provisions. The Company's prior accounting policy for measurement of a forward loss excluded general and administrative costs from the forward loss determination resulting in an incorrect measurement of a forward loss as these costs should be included in the measurement. The aggregate impact of this correction to the contract loss reserve liability, excluding the adjustment for the Lake City Contract, was an increase of $3,061 at October 4, 2015. As part of the correction in accounting policy, the Company also reclassified certain forward loss provisions recorded in net receivables to the contract loss reserve liability.

In addition to the matters in (i) and (ii) described above, the Company also corrected for (iii) certain immaterial misstatements identified during an account review and analysis exercise.

A summary of the impact of these matters on income before income taxes and noncontrolling interest is presented below:

	Increase / (Decrease) Restatement Impact
	Quarter ended  October 4, 2015
Lake City Contract Loss and Related Adjustments:
Sales	$	(8,121	)
Cost of sales	$	(8,809	)
Gross profit	$	688
Income before interest expense, income taxes and noncontrolling interest	$	688
Income before income taxes and noncontrolling interest	$	688
Contract Loss Reserve Adjustment:
Sales	$	—
Cost of sales	$	(646	)
Gross profit	$	646
Income before interest expense, income taxes and noncontrolling interest	$	646
Income before income taxes and noncontrolling interest	$	646
Account Review and Analysis and Other:
Sales	$	(2,250	)
Cost of sales	$	742
Gross profit	$	(2,992	)
Income before interest expense, income taxes and noncontrolling interest	$	(2,992	)
Income before income taxes and noncontrolling interest	$	(2,992	)

The restatement adjustments were tax effected and any tax adjustments reflected in the condensed consolidated financial statements relate entirely to the tax effect on the restatement adjustments.

8

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

The account balances labeled “As Reported” in the following table represents the amounts previously reported in the Company's Quarterly Report on Form 10-Q for the quarter ended October 4, 2015 filed on November 5, 2015 with the SEC. The columns labeled First Restatement Adjustments and Second Restatement Adjustments represent the restatement adjustments disclosed in the Transition Report on Form 10-K for the 2015 transition period previously filed with the SEC on March 15, 2016 and the restatement adjustments disclosed in the Form 10-K/A filed with the SEC in February 2017, respectively. The effects of these prior period errors on the unaudited condensed consolidated statement of comprehensive income for the quarter ended October 4, 2015 were as follows:

	Quarter Ended October 4, 2015
Consolidated Statements of Comprehensive Income (Unaudited)	As Reported			First Restatement Adjustments			Second Restatement Adjustments			As Restated
Sales	$	1,134,886		$	18,731		$	(10,371	)	$	1,143,246
Cost of sales	884,734			58,408			(8,713		)	934,429
Gross profit	250,152			(39,677		)	(1,658		)	208,817
Operating expenses:
Research and development	28,666			—			—			28,666
Selling	28,137			—			—			28,137
General and administrative	69,384			(4,180		)	—			65,204
Gain on settlement	—			50,000			—			50,000
Income before interest, income taxes and noncontrolling interest	123,965			14,503			(1,658		)	136,810
Interest expense, net	(24,293		)	(343		)	—			(24,636		)
Income before income taxes and noncontrolling interest	99,672			14,160			(1,658		)	112,174
Income taxes	33,123			5,487			(630		)	37,980
Net income before noncontrolling interest	66,549			8,673			(1,028		)	74,194
Less net income attributable to noncontrolling interest	147			—			—			147
Net income attributable to Orbital ATK, Inc.	$	66,402		$	8,673		$	(1,028	)	$	74,047
Basic earnings per common share from:
Net income attributable to Orbital ATK, Inc.	$	1.13								$	1.26
Weighted-average number of common shares outstanding	58,746									58,746
Diluted earnings per common share from:
Net income attributable to Orbital ATK, Inc.	$	1.12								$	1.25
Weighted-average number of diluted common shares outstanding	59,304									59,304
Comprehensive income attributable to Orbital ATK, Inc.	$	81,853		$	8,673		$	(1,028	)	$	89,498

4. Fair Value of Financial Instruments

The current authoritative guidance on fair value clarifies the definition of fair value, prescribes a framework for measuring fair value, establishes a fair value hierarchy based on the inputs used to measure fair value, and expands disclosures about the use of fair value measurements. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date.

The valuation techniques required by the current authoritative literature are based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect internal market assumptions. These two types of inputs create the following fair value hierarchy:

Level 1—Quoted prices for identical instruments in active markets.

Level 2—Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable.

Level 3—Significant inputs to the valuation model are unobservable.

9

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

The following section describes the valuation methodologies used by the Company to measure its financial instruments at fair value.

Derivative financial instruments and hedging activities—In order to manage its exposure to commodity pricing, foreign currency risk and interest rate risk on debt, the Company periodically utilizes commodity, foreign currency and interest rate derivatives, which are considered Level 2 instruments. As discussed further in Note 8, the Company has outstanding commodity forward contracts that were entered into to hedge forecasted purchases of copper and zinc, as well as outstanding foreign currency forward contracts that were entered into to hedge forecasted transactions denominated in a foreign currency. Commodity derivatives are valued based on prices of futures exchanges and recently reported transactions in the marketplace. The Company currently holds four interest rate swaps with a total notional value of $300,000. These swaps are valued based on future LIBOR rates and the established fixed rate is based primarily on quotes from banks. Foreign currency derivatives are valued based on observable market transactions of spot currency rates and forward currency prices.

The carrying amounts of the Company’s financial instruments, other than derivatives, which include net receivables, inventory, accounts payable, accrued liabilities and other current assets and liabilities, are reasonable estimates of their related fair values. The fair value of the variable-rate long-term debt is calculated based on current market rates for debt of the same risk and maturities. The fair value of the fixed-rate debt is based on market quotes for each issuance. The Company considers these to be Level 2 instruments.

The Company’s non-financial instruments measured at fair value on a non-recurring basis include goodwill, indefinite-lived intangible assets and long-lived tangible assets. The valuation methods used to determine fair value require a significant degree of management judgment to determine the key assumptions. As such, the Company generally classifies non-financial instruments as either Level 2 or Level 3 fair value measurements.

The following tables set forth, by level within the fair value hierarchy, the Company's financial assets and liabilities that are measured at fair value on a recurring basis:

	October 2, 2016
	Fair Value Measurements Using Inputs Considered as
	Level 1		Level 2		Level 3
Assets
Derivatives	$	—	$	3,188	$	—
Liabilities
Derivatives	$	—	$	2,700	$	—

	December 31, 2015
	Fair Value Measurements Using Inputs Considered as
	Level 1		Level 2		Level 3
Assets
Derivatives	$	—	$	3,979	$	—
Liabilities
Derivatives	$	—	$	8,353	$	—

Recorded carrying amount and fair value of debt was as follows:

	October 2, 2016				December 31, 2015
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Fixed-rate debt	$	700,000	$	732,750	$	700,000	$	712,500
Variable-rate debt	$	895,000	$	889,531	$	790,000	$	787,697

Investments in marketable securities—The Company has investments in marketable securities held in a common collective trust ("CCT") that are primarily fixed income securities used to pay benefits under a nonqualified supplemental executive retirement plan for certain executives and highly compensated employees. Investments in a collective investment vehicle are valued by multiplying the investee company's net asset value per share with the number of units or shares owned at the valuation date as determined by the investee company. Net asset value per share is determined by the investee company's custodian or fund administrator by deducting from the value of the assets of the investee company all of its

10

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

liabilities and dividing the resulting number by the outstanding number of shares or units. Investments held by the CCT, including collateral invested for securities on loan, are valued on the basis of valuations furnished by a pricing service approved by the CCT's investment manager, which determines valuations using methods based on market transactions for comparable securities and various relationships between securities which are generally recognized by institutional traders, or at fair value as determined in good faith by the CCT's investment manager. The fair value of these securities, not subject to leveling, is included within other noncurrent assets on the Company's consolidated balance sheet. The fair value of these securities is measured on a recurring basis and was $12,383 and $12,065 as of October 2, 2016 and December 31, 2015, respectively.

5. Mergers, Acquisitions and Divestitures

On February 9, 2015, the Company completed the spin-off and Distribution of its former Sporting Group to its stockholders and merged with Orbital pursuant to a transaction agreement, dated April 28, 2014 (the "Transaction Agreement"). The Company completed the Merger with Orbital in order to create a global aerospace and defense company with greater technical and industrial capabilities and increased financial resources. Both the Distribution and Merger were structured to be tax-free to U.S. stockholders for U.S. federal income tax purposes. Under the Transaction Agreement, a subsidiary of the Company merged with and into Orbital, with Orbital continuing as a wholly-owned subsidiary of the Company.

Pursuant to the Distribution, Company stockholders received two shares of Vista Outdoor for each share of Company common stock held. The Company distributed a total of approximately 63.9 million shares of Vista Outdoor common stock to its stockholders of record as of the close of business on February 2, 2015 the record date for the Distribution. As a result of the Distribution, Sporting Group is no longer reported within the Company’s results from continuing operations but is reported as a discontinued operation for all prior periods presented in accordance with ASC Topic 205, "Presentation of Financial Statements." Sales reported as discontinued operations were $186,000 for the nine months ended October 4, 2015.

In connection with the Merger, each outstanding share of Orbital common stock was converted into the right to receive 0.449 shares of Company common stock. The Company issued approximately 27.4 million shares of common stock to Orbital stockholders. Immediately following the Merger, Orbital stockholders owned 46.2% of the common stock of the Company and existing stockholders owned 53.8%. Based on the closing price of the Company's common stock following the Distribution on February 9, 2015 as reported on the New York Stock Exchange, the aggregate value of the consideration paid or payable to former holders of Orbital common stock was approximately $1,800,000. The Company used the acquisition method to account for the Merger; accordingly, the results of Orbital have been included in the Company's consolidated financial statements since the date of the Merger.

11

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

Valuation of Net Assets Acquired

The following amounts represent the final determination (as of the Merger date) of the fair value of identifiable assets acquired and liabilities assumed in the Merger, including adjustments made to date during the one year measurement period from the date of the Merger:

Purchase Price:
Value of common shares issued to Orbital shareholders (1)	$	1,749,323
Value of replacement equity-based awards to holders of Orbital equity-based awards (2)	8,654
Total purchase price	$	1,757,977
Value of assets acquired and liabilities assumed:
Cash	$	253,734
Net receivables	558,639
Net inventories	75,294
Intangibles	173,000
Property, plant and equipment	277,438
Deferred tax assets, net	64,821
Other assets	36,878
Goodwill	826,548
Accounts payable	(52,028		)
Contract fair value liabilities	(130,888		)
Other liabilities	(325,459		)
Total purchase price	$	1,757,977

_________________________________________

⁽¹⁾  Equals 27.4 million Orbital ATK shares issued to Orbital shareholders multiplied by $63.94, the closing share price of the Company's common stock on the closing date of the Merger.

⁽²⁾  The fair value of replacement equity-based awards attributable to pre-Merger service was recorded as part of the consideration transferred in the Merger.

The consideration paid for Orbital's assets and liabilities was determined using the fair market value of the Company stock issued on the closing date of the Merger along with restricted stock awards granted to certain employees of Orbital.

Goodwill recognized from the Merger primarily relates to the expanded market opportunities, expected synergies and benefits of increased scale and scope of combined human, physical and financial resources attributable to merging the operations of the two companies. As stated above, the Merger was a tax-free transaction and as such, goodwill is not amortized for tax purposes.

In determining the fair values of identifiable assets acquired and liabilities assumed, a review was conducted for any significant contingent assets or liabilities existing as of the Merger date. There were no significant contingencies identified related to any legal or government action.

The accompanying condensed consolidated statements of comprehensive income (loss) for the nine months ended October 2, 2016 included a measurement period adjustment of $6,000 pertaining to the fair value of intangibles. All elements in the determination of the fair value of identifiable assets acquired and liabilities assumed in the Merger were completed during the quarter ended April 3, 2016.

12

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

Supplemental Pro Forma Data

The following unaudited supplemental pro forma data for the nine months ended October 4, 2015 presents condensed consolidated information as if the Merger had been completed on April 1, 2013. The pro forma results were calculated by combining the results from continuing operations of the Company with the stand-alone results of Orbital for the pre-Merger period, which were adjusted to eliminate historical sales between the companies and to account for certain costs which would have been incurred during this pre-Merger period:

	Nine Months Ended October 4, 2015
Sales	$	3,335,115
Income from continuing operations	$	103,418
Basic per common share from continuing operations	$	1.74
Diluted per common share from continuing operations	$	1.73

The unaudited supplemental pro forma data above includes the following significant adjustments made to account for certain costs which would have been incurred if the Merger had been completed on April 1, 2013, as adjusted for the applicable income tax impact:

	Nine Months Ended October 4, 2015
Amortization of acquired Orbital intangible assets (1)	$	3,877
Interest expense adjustment (2)	$	(6,069	)
Transaction fees for advisory, legal and accounting services (3)	$	(19,134	)

_________________________________________

⁽¹⁾ Added the amortization of acquired Orbital intangible assets recognized at fair value in purchase accounting and eliminated historical Orbital intangible asset amortization expense.

⁽²⁾ Reduced interest expense for the net reduction in debt of the Company and Orbital.

⁽³⁾ Excluded transaction fees for advisory, legal and accounting services incurred in the nine months ended October 4, 2015.

The unaudited supplemental pro forma data above does not reflect the potential realization of cost savings related to the integration of the two companies. Further, the pro forma data should not be considered indicative of the results that would have occurred if the Merger had been completed on April 1, 2013, nor are they indicative of future results.

Ongoing Business with Vista Outdoor

In conjunction with the Distribution, the Company entered into two supply agreements and a Transition Services Agreement ("TSA") with Vista Outdoor. The supply agreements call for Vista Outdoor to purchase certain minimum quantities of ammunition and gun powder from the Company through March 2017 or 2018, as applicable. The supply agreements, which are priced at arms-length, expire in 2017 (powder) and 2018 (ammunition) and may be extended in one-to-three year increments. Under the terms of the TSA, the Company provided Vista Outdoor with administrative services for 12 months following the Distribution and provided tax-related services through August 31, 2016. At the option of Vista Outdoor, the Company is currently providing tax-audit related services to Vista Outdoor. Under the terms of the TSA, Vista Outdoor has this option through August 31, 2017. Fees for services under the TSA are charged to Vista Outdoor.

Sales to Vista Outdoor under the supply agreements were $58,677 and $167,788 for the quarter and nine months ended October 2, 2016, respectively; and $43,589 (as restated) and $119,956 for the quarter and for the period from the date of Distribution to October 4, 2015, respectively. Prior to the Merger, sales to Sporting Group previously reported as intercompany sales and eliminated in consolidation $13,595 for the nine months ended October 4, 2015.

6. Goodwill and Net Intangibles

The changes in the carrying amount of goodwill by segment were as follows:

	Flight Systems Group		Defense Systems Group		Space Systems Group			Total
Balance, December 31, 2015	$	922,991	$	363,247	$	542,128		$	1,828,366
Measurement period adjustments	5,467		—		(1,822		)	3,645
Balance, October 2, 2016	$	928,458	$	363,247	$	540,306		$	1,832,011

Goodwill recorded within Defense Systems Group is presented net of accumulated impairment losses totaling $3,700 at October 2, 2016. Goodwill recorded within Space Systems Group is presented net of accumulated impairment losses totaling $142,800 at October 2, 2016.

Net Intangibles consisted of the following:

	October 2, 2016							December 31, 2015
Amortizing intangibles:	Gross Carrying Amount		Accumulated Amortization			Net Intangibles		Gross Carrying Amount		Accumulated Amortization			Net Intangibles
Contract Backlog	$	173,000	$	(68,324	)	$	104,676	$	179,000	$	(36,696	)	$	142,304
Patented technology	11,018		(7,070		)	3,948		11,018		(6,206		)	4,812
Customer relationships and other	1,905		(1,905		)	—		24,294		(24,254		)	40
Net Intangibles	$	185,923	$	(77,299	)	$	108,624	$	214,312	$	(67,156	)	$	147,156

The contract backlog asset in the table above is being amortized as the underlying costs are recognized under the contracts. The other assets in the table above are being amortized using a straight-line method. Amortization expense related to net intangible assets was $10,821 and $32,535 for the quarter and nine months ended October 2, 2016, respectively, and $13,218 and $33,183 for the quarter and nine months ended October 4, 2015, respectively. The Company expects amortization expense related to these assets to be as follows:

	Contract Backlog		Patents		Total
Remainder of 2016	$	10,543	$	311	$	10,854
2017	35,882		1,180		37,062
2018	25,609		1,120		26,729
2019	21,760		1,072		22,832
2020	10,882		265		11,147
Thereafter	—		—		—
Total	$	104,676	$	3,948	$	108,624

7. Earnings Per Share Data

Basic earnings per share ("EPS") is computed based upon the weighted-average number of common shares outstanding for each period. Diluted EPS is computed based on the weighted-average number of common shares outstanding and increased to include the dilutive effect of outstanding stock-based equity awards for each period.

13

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

In computing basic and diluted EPS for both the quarter and nine months ended October 2, 2016 and October 4, 2015, the reported earnings for each respective period were divided by the weighted-average shares outstanding, determined as follows (in thousands):

	Quarter Ended		Nine Months Ended
	October 2, 2016	October 4, 2015	October 2, 2016	October 4, 2015
Basic weighted-average number of shares outstanding	57,927	58,746	58,213	54,807
Dilutive common share equivalents - share-based equity awards	330	558	429	421
Diluted weighted-average number of shares outstanding	58,257	59,304	58,642	55,228
Anti-dilutive stock options excluded from the calculation of diluted shares	147	89	147	102

8. Derivative Financial Instruments

The Company is exposed to market risks arising from adverse changes in commodity prices affecting the cost of raw materials and energy, interest rates and foreign exchange risks. In the normal course of business, these risks are managed through a variety of strategies, including the use of derivative instruments. Commodity forward contracts are periodically used to hedge forecasted purchases of certain commodities, foreign currency exchange contracts are used to hedge forecasted transactions denominated in a foreign currency, and the Company periodically uses interest rate swaps to hedge forecasted interest payments and the risk associated with variable interest rates on long-term debt.

The Company entered into forward contracts for copper and zinc in 2016. The contracts establish a fixed price for the underlying commodity and are designated and qualify as effective cash flow hedges of purchases of the commodity. Ineffectiveness is calculated as the amount by which the change in the fair value of the derivatives exceeds the change in the fair value of the anticipated commodity purchases.

The Company entered into interest rate swaps in fiscal 2014 in order to manage interest costs and the risk associated with variable rates, whereby the Company pays a fixed rate on a total notional amount of $300,000 and receives one-month LIBOR. The fair value of interest rate swap agreements approximates the amount at which they could be settled, based on future LIBOR, and the established fixed rate is based primarily on quotes from banks. The Company performs assessments of the effectiveness of hedge instruments on a quarterly basis and determined the hedges to be highly effective. The counterparties to the interest rate swap agreements expose the Company to credit risk in the event of nonperformance. At October 2, 2016, the outstanding swap agreements were in a net liability position which would require the Company to make the net settlement payments to the counterparties if the agreements were settled as of that date. The Company does not anticipate nonperformance by the Company's counterparties. The Company does not hold or issue derivative financial instruments for trading purposes.

The Company entered into foreign currency forward contracts in 2016 to hedge forecasted cash payments to a customer. This transaction was designated and qualified as an effective cash flow hedge. Ineffectiveness with respect to forecasted inventory purchases or customer cash receipts is calculated based on changes in the forward rate until the anticipated purchase or cash receipt occurs; ineffectiveness of the hedge of the accounts payable is evaluated based on the change in fair value of its anticipated settlement.

The fair values of the commodity and foreign currency forward contracts are recorded in other assets or liabilities, as appropriate, and the effective portion is reflected in accumulated other comprehensive income (loss) in the financial statements. The gains or losses on the commodity forward contracts are recorded in inventory as the commodities are purchased and in cost of sales when the related inventory is sold. The gains or losses on the foreign currency forward contracts are recorded in earnings when the related inventory is sold or customer cash receipts are received.

Outstanding commodity forward contracts that hedge forecasted commodity purchases were as follows:

	Number of Pounds
Copper	11,375
Zinc	3,830

Interest rate swap agreements in order to manage interest costs and risk associated with variable interest rates were as follows:

	Notional		Fair Value			Pay Fixed		Receive Floating		Maturity Date
Non-amortizing swap	$	100,000	$	(574	)	1.29	%	0.52	%	August 2017
Non-amortizing swap	$	100,000	$	(1,781	)	1.69	%	0.52	%	August 2018
Non-amortizing swap	$	50,000	$	(9	)	0.65	%	0.52	%	November 2016
Non-amortizing swap	$	50,000	$	(254	)	1.10	%	0.52	%	November 2017

The amount to be paid or received under these swaps is recorded as an adjustment to interest expense.

Outstanding foreign currency forward contracts were as follows:

14

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

	Quantity Hedged
Euros sold	49,820
Euros purchased	3,207

Fair values in the condensed consolidated balance sheets related to derivative instruments designated as hedging instruments were as follows:

		Asset Derivatives Fair Value				Liability Derivatives Fair Value
	Location	October 2, 2016		December 31, 2015		October 2, 2016		December 31, 2015
Commodity forward contracts	Other current assets / other current liabilities	$	1,557	$	—	$	—	$	4,445
Commodity forward contracts	Other noncurrent assets / other noncurrent liabilities	486		—		—		—
Foreign currency forward contracts	Other current assets / other current liabilities	1,126		2,875		81		1,442
Foreign currency forward contracts	Other noncurrent assets / other noncurrent liabilities	19		1,095		—		18
Interest rate contracts	Other current assets / other current liabilities	—		9		583		—
Interest rate contracts	Other noncurrent assets / other noncurrent liabilities	—		—		2,036		2,448
Total		$	3,188	$	3,979	$	2,700	$	8,353

Due to the customer contract requirements, the benefits associated with the commodity contracts may be passed on to the customer and not realized by the Company.

Gains and losses reclassified from AOCI in the condensed consolidated statements of comprehensive income related to derivative instruments were as follows:

	Gain (Loss) Reclassified from AOCI
	Location	Amount
Quarter ended October 2, 2016
Commodity forward contracts	Cost of sales	$	137
Interest rate contracts	Interest expense	$	(673	)
Foreign currency forward contracts	Cost of sales	$	(110	)
Quarter ended October 4, 2015
Commodity forward contracts	Cost of sales	$	(919	)
Interest rate contracts	Interest expense	$	(1,011	)
Foreign currency forward contracts	Cost of sales	$	(834	)
Nine months ended October 2, 2016
Commodity forward contracts	Cost of sales	$	(3,595	)
Interest rate contracts	Interest expense	$	(2,179	)
Foreign currency forward contracts	Cost of sales	$	(74	)
Nine months ended October 4, 2015
Commodity forward contracts	Cost of sales	$	(3,727	)
Interest rate contracts	Interest expense	$	(3,041	)
Foreign currency forward contracts	Cost of sales	$	(10,527	)

15

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

The ineffective portion of derivative instruments was not material and no derivatives were excluded from effectiveness testing during the quarter and nine months ended October 2, 2016 and October 4, 2015; accordingly, the Company did not recognize any related gains or losses in the income statement.

All derivatives used by the Company during the periods presented were designated as hedging instruments for accounting purposes.

The Company expects the remaining unrealized losses will be realized and reported in cost of sales or interest expense depending on the type of contract consistent with realized gains and losses noted in the table above. Estimated and actual gains or losses will change as market prices change.

9. Accumulated Other Comprehensive Loss ("AOCI")

The following table summarizes the components of AOCI, net of income taxes:

	October 2, 2016			December 31, 2015
Derivatives	$	256		$	(3,059	)
Pension and other postretirement benefits	(713,986		)	(784,294		)
Available-for-sale securities	2,521			1,445
Total AOCI	$	(711,209	)	$	(785,908	)

16

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

10. Net Receivables

Net receivables, including amounts due under long-term contracts, consisted of the following:

	October 2, 2016			December 31, 2015
Billed receivables	$	378,641		$	217,522
Unbilled receivables	1,486,721			1,454,327
Less allowance for doubtful accounts	(536		)	(1,028		)
Net receivables	$	1,864,826		$	1,670,821

Receivable balances are shown net of customer progress payments received of $609,255 as of October 2, 2016 and $584,325 as of December 31, 2015.

Unbilled receivables represent the balance of recoverable costs and accrued profit, comprised principally of revenue recognized on contracts for which billings have not been presented to the customer because the amounts were earned but not contractually billable as of the balance sheet date. As of October 2, 2016 and December 31, 2015, the net receivable balance includes contract-related unbilled receivables which the Company does not expect to collect within the next 12 months of $293,200 and $311,600, respectively.

11. Net Inventories

Net inventories consisted of the following:

	October 2, 2016		December 31, 2015
Raw materials	$	80,767	$	88,365
Contracts in process	148,987		124,315
Finished goods	333		532
Net inventories	$	230,087	$	213,212

12. Long-term Debt

Long-term debt consisted of the following:

	October 2, 2016		December 31, 2015
Senior Credit Facility:
Term Loan A due 2020	$	760,000	$	790,000
Revolving Credit Facility due 2020	135,000		—
5.25% Senior Notes due 2021	300,000		300,000
5.50% Senior Notes due 2023	400,000		400,000
Principal amount of long-term debt	1,595,000		1,490,000
Unamortized debt issuance costs:
Senior Credit Facility	5,318		6,302
5.25% Senior Notes due 2021	1,668		1,915
5.50% Senior Notes due 2023	5,372		5,947
Unamortized debt issuance costs	12,358		14,164
Long-term debt less unamortized debt issuance costs	1,582,642		1,475,836
Less: Current portion of long-term debt	40,000		40,000
Long-term debt	$	1,542,642	$	1,435,836

Senior Credit Facility

In September 2015, the Company refinanced its former senior credit facility with a new senior credit facility (the "Senior Credit Facility"), which is comprised of a term loan of $800,000 (the "Term Loan A") and a revolving credit facility of

17

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

$1,000,000 (the "Revolving Credit Facility"), which mature in September 2020. The Term Loan A is subject to quarterly principal payments of $10,000, with the remaining balance due at maturity. Substantially all tangible and intangible assets of the Company and certain domestic subsidiaries, excluding real property, are pledged as collateral under the Senior Credit Facility. Borrowings under the Senior Credit Facility bear interest at a per annum rate equal to either the sum of a base rate plus a margin or the sum of a LIBOR rate plus a margin. Each margin is based on the Company's total leverage ratio. In compliance with the terms of the Senior Credit Facility, the current base rate margin is 0.5% and the current LIBOR margin is 1.5%. The weighted-average interest rate for the Term Loan A, after taking into account the interest rate swaps discussed below, was 2.33% at October 2, 2016. The Company pays a quarterly commitment fee on the unused portion of the Revolving Credit Facility based on its total leverage ratio. Based on the Company's current total leverage ratio, this fee is currently 0.25%. As of October 2, 2016, the Company had borrowings of $135,000 under the Revolving Credit Facility and had outstanding letters of credit of $128,121, which reduced amounts available on the Revolving Credit Facility to $736,879. There are unamortized debt issuance costs of $6,667 associated with the former senior credit facility in addition to debt issuance costs incurred related to the new Senior Credit Facility that are being amortized to interest expense over five years, the term of the Senior Credit Facility.

5.50% Senior Notes

In September 2015, the Company issued $400,000 aggregate principal amount of 5.50% Senior Notes (the "5.50% Notes") that mature on October 1, 2023. These notes are general unsecured obligations. Interest on these notes is payable on April 1 and October 1 of each year. The Company has the right to redeem some or all of these notes from time to time on or after October 1, 2018, at specified redemption prices. Prior to October 1, 2018, the Company may redeem some or all of these notes at a price equal to 100% of their principal amount plus accrued and unpaid interest to the date of redemption and a specified make-whole premium. In addition, prior to October 1, 2018, the Company may redeem up to 35% of the aggregate principal amount of these notes with the net cash proceeds of certain equity offerings, at a price equal to 105.5% of their principal amount plus accrued and unpaid interest to the date of redemption. Debt issuance costs of $6,136 related to these notes are being amortized to interest expense over eight years, the term of the notes.

5.25% Senior Notes

In fiscal 2014, the Company issued $300,000 aggregate principal amount of 5.25% Senior Notes (the "5.25% Notes") that mature on October 1, 2021. These notes are general unsecured obligations. Interest on these notes is payable on April 1 and October 1 of each year. The Company has the right to redeem some or all of these notes from time to time on or after October 1, 2016, at specified redemption prices. Debt issuance costs of $2,625 related to these notes are being amortized to interest expense over eight years, the term of the notes.

Interest Rate Swaps

As of October 2, 2016, the Company had interest rate swap agreements in order to manage interest costs and the risk associated with variable interest rates - see Note 8.

Rank and Guarantees

The 5.50% Notes and the 5.25% Notes are the Company's general unsecured and unsubordinated obligations and rank equally in right of payment with all of the Company’s existing and future unsecured and unsubordinated indebtedness, rank senior in right of payment to all of the Company's existing and future subordinated indebtedness and are effectively subordinated to all existing and future senior secured indebtedness, including the Senior Credit Facility, to the extent of the collateral. The 5.50% Notes and the 5.25% Notes are guaranteed on an unsecured basis, jointly and severally and fully and unconditionally, by substantially all of the Company's domestic subsidiaries. The Senior Credit Facility obligations are guaranteed on a secured basis, jointly and severally and fully and unconditionally, by substantially all of the Company's domestic subsidiaries. All of these guarantor subsidiaries are 100% owned by the Company. The Company, exclusive of these guarantor subsidiaries, has no independent operations or material assets. The guarantee by any Subsidiary Guarantor of the Company's obligations in respect of the 5.50% Notes and the 5.25% Notes will be released in each of the following circumstances:

• if, as a result of the sale of its capital stock, such Subsidiary Guarantor ceases to be a Restricted Subsidiary;

• if such Subsidiary Guarantor is designated as an "Unrestricted Subsidiary" with respect to the 5.25% Notes and the 5.50% Notes;

• upon defeasance or satisfaction and discharge of the 5.25% Notes and the 5.50% Notes, as applicable; and

18

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

• if such Subsidiary Guarantor has been released from its guarantees of indebtedness under the credit agreement governing the Senior Credit Facility (the "Credit Agreement") and all capital markets debt securities.

Scheduled Minimum Loan Payments

The scheduled minimum loan payments on outstanding long-term debt are as follows:

Remainder of 2016	$	10,000
Calendar 2017	40,000
Calendar 2018	40,000
Calendar 2019	40,000
Calendar 2020	765,000
Thereafter	700,000
Total	$	1,595,000

Covenants and Default Provisions

The Company's Senior Credit Facility and the indentures governing the 5.50% Notes and the 5.25% Notes impose restrictions on the Company, including limitations on its ability to incur additional debt, enter into capital leases, grant liens, pay dividends and make certain other payments, sell assets, or merge or consolidate with or into another entity. In addition, the Senior Credit Facility limits the Company's ability to enter into sale-and-leaseback transactions. The 5.50% Notes and 5.25% Notes limit the aggregate sum of dividends, share repurchases and other designated restricted payments to an amount based on the Company's net income, stock issuance proceeds and certain other items since April 1, 2001, less restricted payments made since that date. The Senior Credit Facility allows the Company to make unlimited "restricted payments" (as defined in the Credit Agreement), which, among other items, would allow payments for future stock repurchases, as long as the Company maintains a certain amount of liquidity and maintains certain senior secured debt limits, with a limit, when those senior secured debt limits are not met, of $250,000 plus proceeds of any equity issuances plus 50% of net income since October 7, 2010. The Senior Credit Facility also requires the Company to meet and maintain specified financial ratios, including a minimum interest coverage ratio and a maximum consolidated total leverage ratio. The Company's debt agreements contain cross-default provisions so that noncompliance with the covenants within one debt agreement could cause a default under other debt agreements as well. The Company's ability to comply with these covenants and to meet and maintain the financial ratios may be affected by events beyond its control. Borrowings under the Senior Credit Facility are subject to compliance with these covenants. As of October 2, 2016, the Company was in compliance with the financial covenants.

13. Employee Benefit Plans

The components of net periodic benefit cost for pension benefits were as follows:

	Pension Benefits
	Quarter Ended						Nine Months Ended
	October 2, 2016			October 4, 2015			October 2, 2016			October 4, 2015
Service cost	$	4,556		$	4,815		$	13,645		$	14,445
Interest cost	25,360			30,348			76,186			90,866
Expected return on plan assets	(40,578		)	(40,117		)	(121,733		)	(119,867		)
Amortization of unrecognized net loss	31,355			37,690			94,167			112,989
Amortization of unrecognized prior service cost	(5,151		)	(5,213		)	(15,453		)	(15,638		)
Net periodic benefit cost	15,542			27,523			46,812			82,795
Special termination benefit cost / curtailment	—			—			1,673			—
Net periodic benefit cost	$	15,542		$	27,523		$	48,485		$	82,795

19

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

During the nine months ended October 2, 2016, the Company recorded a settlement expense of $1,673 to recognize the impact of lump sum benefit payments made in the nonqualified supplemental executive retirement plan.

The components of net periodic benefit income for other postretirement benefits were as follows:

	Other Postretirement Benefits
	Quarter Ended						Nine Months Ended
	October 2, 2016			October 4, 2015			October 2, 2016			October 4, 2015
Service cost	$	—		$	1		$	1		$	1
Interest cost	841			1,126			2,523			3,446
Expected return on plan assets	(780		)	(922		)	(2,405		)	(2,732		)
Amortization of unrecognized net loss	364			495			1,091			1,393
Amortization of unrecognized prior service cost	(1,291		)	(1,813		)	(3,871		)	(5,706		)
Net periodic benefit income	$	(866	)	$	(1,113	)	$	(2,661	)	$	(3,598	)

Effective January 1, 2016, the Company changed the approach used to measure service and interest costs for pension and other postretirement benefits. Prior to January 1, 2016, the Company measured service and interest costs utilizing a single weighted-average discount rate derived from the yield curve used to measure the plan obligations. Beginning January 1, 2016, the Company has elected to measure service and interest costs by applying the specific spot rates along that yield curve to the plans' liability cash flows. The Company believes the new approach provides a more precise measurement of service and interest costs by aligning the timing of the plans’ forecasted cash flows to the corresponding spot rates on the yield curve. This change does not affect the measurement of plan obligations. The Company accounted for this change on a prospective basis as a change in accounting estimate, resulting in lower pension expense compared to the method used prior to January 1, 2016.

Employer Contributions. During the nine months ended October 2, 2016, the Company contributed $39,500 to the pension trust. The Company also paid $4,776 to retirees in connection with its nonqualified supplemental executive retirement plan and $4,814 to retirees in connection with its other postretirement benefit plans.

During the remainder of 2016, the Company is not required to make any additional pension benefit contributions in order to meet the minimum required contributions for 2016. In addition, the Company anticipates making additional payments of approximately $692 to retirees under the nonqualified plan and $2,674 to retirees in connection with its other postretirement benefit plans during the remainder of 2016.

During the quarter ended October 2, 2016, the Company amended its retiree health care plan to provide coverage through a private exchange effective January 1, 2017. The exchange offers the retiree a broad choice of health care plans from which to choose. The Company will contribute fixed payments to a Health Retirement Account (HRA), when applicable, for those retirees who previously had subsidized health care coverage through the Company. The contributions to the HRA account are retirees' funds to be spent on qualified health care premiums and eligible out-of pocket expenses. The plan amendment caused a remeasurement that increased the Company's funded status as of October 2, 2016 by $36,444 and will reduce expenses recorded in future periods.

14. Income Taxes

The Company's income taxes include federal, foreign and state income taxes. Income taxes for interim periods are based on estimated effective annual income tax rates.

The effective income tax rates for the quarters ended October 2, 2016 and October 4, 2015 were 18.0% and 33.9% (as restated), respectively. The decrease in the rate from the quarter ended October 4, 2015 is primarily due to increased benefits from the Research and Development tax credit, the true up of prior-year taxes and settlement of the examination by the Internal Revenue Service ("IRS") of the fiscal 2013 and 2014 tax returns in the quarter ended October 2, 2016.

The effective income tax rates for the nine months ended October 2, 2016 and October 4, 2015 were 25.9% and 39.9%, respectively. The decrease in the rate from the nine months ended October 4, 2015 is primarily due to the impact of goodwill impairment and nondeductible transaction costs in the nine months ended October 4, 2015, as well as increased benefits from the Domestic Manufacturing Deduction, increased Research and Development tax credits, the true up of prior-year taxes and settlement of the examination by the IRS of the fiscal 2013 and 2014 tax returns partially offset by an increase in state tax expense in the nine months ended October 2, 2016.

20

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

The Company or one of its subsidiaries files income tax returns in the U.S. federal, various U.S. state and foreign jurisdictions. With few exceptions, the Company is no longer subject to U.S. federal, state and local, or foreign income tax examinations by tax authorities for years prior to 2010. The IRS has completed the audits of the Company through fiscal 2014. The Company believes appropriate provisions for all outstanding issues have been made for all remaining open years in all jurisdictions.

Although the timing and outcome of audit settlements are uncertain, it is reasonably possible that a $11,176 reduction of the uncertain tax benefits will occur in the next 12 months. The settlement of these unrecognized tax benefits could result in an increase in net income from $0 to $10,074.

15. Stock-based Compensation

The Company has 5,000,000 shares of $1.00 par value preferred stock authorized, none of which has been issued.

The Company sponsors five stock-based incentive plans: the Orbital ATK, Inc. 2015 Stock Incentive Plan (the "2015 Stock Incentive Plan"); three legacy ATK plans (the Alliant Techsystems Inc. 2005 Stock Incentive Plan, the Non-Employee Director Restricted Stock Plan and the 1990 Equity Incentive Plan); and one legacy Orbital plan, under which the Company assumed the obligation to issue Company common stock pursuant to the terms of the Transaction Agreement relating to the Merger (the Orbital Sciences Corporation 2005 Amended and Restated Stock Incentive Plan). At October 2, 2016, the Company had authorized up to 3,750,000 common shares under the 2015 Stock Incentive Plan, of which 2,812,847 common shares were available to be granted. No new grants will be made out of the other four plans.

During the quarter ended October 2, 2016, the Company adopted an Employee Stock Purchase Plan ("ESPP") whereby eligible employees may purchase shares of the Company's common stock at the lesser of 85% of the fair market value of a share of common stock at the beginning or at the end of the quarterly offering period. The ESPP is compensatory and the fair value of the shares purchased is determined using the Black-Scholes option pricing model.

There are five types of awards outstanding under the Company's stock incentive plans: performance awards, total stockholder return performance awards ("TSR awards"), restricted stock units, restricted stock and stock options. The Company issues treasury shares upon (i) the payment of performance awards, TSR awards and restricted stock units, (ii) the grant of restricted stock and (iii) the exercise of stock options.

Restricted Stock Units. Pursuant to the terms of the Transaction Agreement and under the terms of the ATK 2005 Stock Incentive Plan, all of the performance awards and TSR awards outstanding as of February 9, 2015 were converted into time-vesting restricted stock units with vesting periods corresponding to the respective performance periods. During the nine months ended October 2, 2016, 42,935 shares were issued upon the vesting of restricted stock units for the performance period ending in 2016. As of October 2, 2016, there were 53,449 restricted stock units outstanding for the performance period ending in 2017.

Performance Awards. Performance shares are valued at the fair value of the Company's stock as of the grant date and expense is recognized based on the number of shares expected to vest under the terms of the award under which they are granted.

As of October 2, 2016, there were 81,689 shares reserved for executive officers and key employees for the performance period beginning April 1, 2015 and ending December 31, 2017. Of these shares, up to 50% will become payable only upon achievement of a financial performance goal relating to absolute earnings per share growth; and up to 50% will become payable only upon achievement of a performance goal relating to absolute sales growth.

As of October 2, 2016, there were 73,802 shares reserved for executive officers and key employees for the performance period beginning January 1, 2016 and ending December 31, 2018. Of these shares, up to 50% will become payable only upon achievement of a financial performance goal relating to return on investment of capital; and up to 50% will become payable only upon achievement of a performance goal relating to absolute sales growth.

TSR Awards. As of October 2, 2016, there were 73,802 shares and 81,689 shares reserved for TSR awards for key employees for the fiscal year 2016-2018 and 2015-2017 performance periods, respectively. The Company used an integrated Monte Carlo simulation model to determine the fair value of the TSR awards. The Monte Carlo model calculates the probability of satisfying the market conditions stipulated in the award. This probability is an input into the trinomial lattice model used to determine the fair value of the awards as well as the assumptions of other variables, including the risk-free interest rate and expected volatility of the Company's stock price in future periods. The risk-free rate is based on the U.S. dollar-denominated U.S. Treasury strip rate with a remaining term that approximates the life assumed at the date of grant. There were 73,802 TSR

21

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

awards granted with a fair value of $87.85 per share and 3,208 TSR awards granted with a fair value of $94.93 per share during the nine months ended October 2, 2016.

Restricted Stock Awards. Restricted stock granted to non-employee directors and certain key employees totaled 160,242 shares during the nine months ended October 2, 2016. Restricted shares vest over periods generally ranging from one to three years from the date of award and are valued at the fair value of the Company's common stock as of the grant date.

Stock Options. Stock options are granted periodically, with an exercise price equal to the fair market value of the Company's common stock on the date of grant, and generally vest from one to three years from the date of grant. Options are generally granted with seven-year or ten-year terms. The weighted-average fair value of each option grant is estimated on the date of grant using the Black-Scholes option pricing model and represents the difference between fair market value on the date of grant and the estimated market value on the expected exercise date. The option pricing model requires the Company to make assumptions. The risk-free rate is based on U.S. Treasury zero-coupon issues with a remaining term that approximates the expected life assumed at the date of grant. Expected volatility is based on the historical volatility of the Company's stock over the past seven years. The expected option life is based on the contractual term of the stock option and expected employee exercise and post-vesting employment termination trends. There were 72,328 stock options granted during the nine months ended October 2, 2016 with a weighted-average fair value of $20.53 per stock option. There were 74,543 stock options granted during the nine months ended October 4, 2015 with a weighted-average fair value of $39.44 per stock option.

Stock-based compensation expense totaled $6,317 and $17,515 in the quarter and nine months ended October 2, 2016; and $6,046 and $28,369 in the quarter and nine months ended October 4, 2015. The income tax benefit recognized for stock-based compensation was $2,182 and $6,445 during the quarter and nine months ended October 2, 2016; and $2,194 and $9,815 during the quarter and nine months ended October 4, 2015.

16. Contingencies

Litigation.   From time to time, the Company is subject to various legal proceedings, including lawsuits, which arise out of, and are incidental to, the conduct of the Company's business. The Company does not consider any of such proceedings that are currently pending, individually or in the aggregate, notwithstanding that the unfavorable resolution of any matter may have a material effect on net earnings in any particular quarter, to be material to its business or likely to result in a material adverse effect on its operating results, financial condition or cash flows.

Securities Class Action.   On August 12, 2016, a putative class action complaint, naming the Company, our Chief Executive Officer and our Chief Financial Officer as defendants, was filed in the United States District Court for the Eastern District of Virginia (Steven Knurr v. Orbital ATK, Inc., et al., No. 16-cv-01031 (TSE-MSN)). The class action complaint asserts claims on behalf of purchasers of Orbital ATK securities for violations of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 and Rule 10b-5 thereunder, arising out of allegedly false and misleading statements and the failure to disclose that: (i) the Company lacked effective control over financial reporting; and (ii) as a result, the Company failed to record an anticipated loss on its long-term contract with the U.S. Army to manufacture and supply small caliber ammunition at the U.S. Army’s Lake City Army Ammunition Plant. The complaint seeks a determination that this matter is a proper class action and certifying the plaintiff as the class representative, an award of damages, an award of reasonable costs and expenses of trial, including counsel and expert fees, and an award of such other relief as deemed appropriate by the Court. The Company intends to defend this action vigorously.

SEC Investigation.   The SEC is conducting a non-public investigation relating to our historical accounting practices as a result of the prior restatement of the Company’s unaudited condensed consolidated financial statements for the quarterly periods ended July 5, 2015 and October 4, 2015 as described in the Company's Amendment to the Transition Report on Form 10-K for the nine-month transition period ending December 31, 2015 filed on March 15, 2016. The Company has also voluntarily self-reported to the SEC regarding matters pertaining to the Restatement described in the Company's Amendment to the Form 10-K for the nine-month transition period ending December 31, 2015 filed on February 24, 2017. The Company is cooperating fully with the SEC in connection with these matters.

U.S. Government Investigations.   The Company is also subject to U.S. Government investigations from which civil, criminal or administrative proceedings could result. Such proceedings could involve claims by the U.S. Government for fines, penalties, compensatory and treble damages, restitution and/or forfeitures. Under government regulations, a company, or one or more of its operating divisions or subdivisions, can also be suspended or debarred from government contracts, or lose its export privileges, based on the results of investigations. The Company believes, based upon all available information, that the outcome of any such pending government investigations will not have a material adverse effect on its operating results, financial condition or cash flows.

Claim Recovery.   Profits expected to be realized on contracts are based on management's estimates of total contract sales value and costs at completion. Estimated amounts for contract changes and claims are included in contract sales only when realization is estimated to be probable. Unbilled receivables included $13,175 and $25,042 as of October 2, 2016 and December 31, 2015, respectively, for contract claims.

Environmental Liabilities.   The Company's operations and ownership or use of real property are subject to a number of federal, state, and local environmental laws and regulations, including those for discharge of hazardous materials, remediation of contaminated sites and restoration of damage to the environment. At certain sites that the Company owns or operates or formerly owned or operated, there is known or potential contamination that the Company is required to investigate or remediate. The Company could incur substantial costs, including remediation costs, resource restoration costs, fines, and

22

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

penalties, or third party property damage or personal injury claims, as a result of liabilities associated with past practices or violations of environmental laws or noncompliance with environmental permits.

The Company has been identified as a potentially responsible party (“PRP”), along with other parties, in several regulatory agency actions associated with hazardous waste sites. As a PRP, the Company may be required to pay a share of the costs of the investigation and clean-up of these sites. While uncertainties exist with respect to the amounts and timing of the ultimate environmental liabilities, based on currently available information, the Company has concluded that these matters, individually or in the aggregate, will not have a material adverse effect on operating results, financial condition, or cash flows.

The Company could incur substantial costs, including cleanup costs, resource restoration, fines and penalties or third party property damage or personal injury claims, as a result of violations or liabilities under environmental laws or noncompliance with environmental permits. While environmental laws and regulations have not had a material adverse effect on the Company's operating results, financial condition, or cash flows in the past and the Company has environmental management programs in place to mitigate these risks, it is difficult to predict whether they will have a material impact in the future.

The liability for environmental remediation represents management's best estimate of the present value of the probable and reasonably estimable costs related to known remediation obligations. The receivable represents the present value of the amount that the Company expects to recover, as discussed below. Both the liability and receivable have been discounted to reflect the present value of the expected future cash flows, using a discount rate of 0.2% and 0.7% as of October 2, 2016 and December 31, 2015, respectively. The Company's discount rate is calculated using the 20-year Treasury constant maturities rate, net of an estimated inflationary factor of 1.9%, rounded to the nearest quarter percent.

The following is a summary of the amounts recorded for environmental remediation:

	October 2, 2016						December 31, 2015
	Liability			Receivable			Liability			Receivable
Amounts (payable) receivable	$	(43,939	)	$	19,762		$	(41,824	)	$	18,236
Unamortized discount	524			(179		)	1,718			(568		)
Present value amounts (payable) receivable	$	(43,415	)	$	19,583		$	(40,106	)	$	17,668

Amounts expected to be paid or received in periods more than one year from the balance sheet date are classified as noncurrent. Of the $43,415 discounted liability as of October 2, 2016, $5,706 was recorded in other current liabilities. Of the $19,583 discounted receivable, the Company recorded $3,318 in other current assets. As of October 2, 2016, the estimated discounted range of reasonably possible costs of environmental remediation was $43,415 to $68,340.

The Company expects that a portion of its environmental compliance and remediation costs will be recoverable under U.S. Government contracts. Some of the remediation costs that are not recoverable from the U.S. Government that are associated with facilities purchased in a business acquisition are covered by various indemnification agreements, as described in Note 14 to the audited consolidated financial statements included in the Company’s Form 10-K/A.

17. Share Repurchases

On March 11, 2015, the Company's Board of Directors authorized the Company to repurchase up to the lesser of $75,000 or 1.0 million shares of its common stock through December 31, 2015. On August 4, 2015, the Board of Directors increased the amount authorized for repurchase to the lesser of $100,000 or 1.4 million shares of the Company's common stock. On October 29, 2015, the Board of Directors further increased the amount authorized for repurchase to the lesser of $250,000 or 3.25 million shares through December 31, 2016. On November 1, 2016, the Board of Directors further increased the amount authorized for repurchase to the lesser of $300,000 or 4.0 million shares and extended the repurchase period through March 31, 2017. On February 27, 2017, the Board of Directors further increased the amount authorized for repurchase to $450,000 and extended the repurchase period through March 31, 2018.

Shares of the Company's common stock may be purchased in the open market, subject to compliance with applicable laws and regulations and the Company’s debt covenants, depending upon market conditions and other factors. The Company purchased 576,407 shares for $43,750 and 1,104,511 shares for $87,991 during the quarter and nine months ended October 2, 2016, respectively. The Company purchased 497,145 shares for $36,275 and 825,986 shares for $60,777 during the quarter and nine months ended October 4, 2015.

23

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

In accordance with the Transaction Agreement entered into on April 28, 2014, we did not repurchase any outstanding shares prior to the closing of the Distribution and Merger during the quarter ended March 31, 2015.

18. Changes in Estimates

The majority of our sales are accounted for as long-term contracts, which are accounted for using the percentage-of-completion method. Accounting for contracts under the percentage-of-completion method requires judgment relative to assessing risks and estimating contract revenues and costs. Profits expected to be realized on contracts are based on management’s estimates of total contract sales value and costs at completion. Estimated amounts for contract changes, including scope and claims, are included in contract sales only when realization is probable. Assumptions used for recording sales and earnings are modified in the period of change to reflect revisions in contract value and estimated costs. In the period in which it is determined that a loss will be incurred on a contract, the entire amount of the estimated loss, based on gross profit along with general and administrative costs, is charged to cost of sales. Changes in estimates of contract value, costs or profits are recognized using the cumulative catch-up method of accounting. The cumulative effect of a change in estimate is recognized in the period a change in estimate occurs.

Changes in contract estimates occur for a variety of reasons including changes in contract scope, unforeseen changes in contract cost estimates due to unanticipated cost growth or risks affecting contract costs and/or the resolution of contract risks at lower costs than anticipated, as well as changes in contract overhead costs over the performance period. Changes in estimates could have a material effect on the Company's consolidated financial position or annual results of operations.

Aggregate net changes in contract estimates recognized using the cumulative catch-up method of accounting increased operating income by approximately $6,000 and $27,000 for the quarters ended October 2, 2016 and October 4, 2015, respectively. The changes in estimates for the quarter ended October 2, 2016 were primarily attributable to changes in scope on the Company's contracts in all segments, primarily in Flight Systems Group. The changes in estimates for the quarter ended October 4, 2015 were attributable to profit margin improvements in all segments, primarily in Flight Systems Group and Space Systems Group.

Aggregate net changes in contract estimates recognized using the cumulative catch-up method of accounting increased operating income by approximately $92,000 and $81,000 for the nine months ended October 2, 2016 and October 4, 2015, respectively. The changes in estimates for the nine months ended October 2, 2016 were attributable to profit margin improvements in all segments, primarily in Defense Systems Group and Flight Systems Group. The changes in estimates for the nine months ended October 4, 2015 were attributable to profit margin improvements in all segments, primarily Defense Systems Group and Flight Systems Group. Estimated costs to complete on loss contracts at October 2, 2016 and December 31, 2015 were $1,248,549 and $1,392,218, respectively.

19. Restructuring Costs

The Company had restructuring liabilities for termination benefits of $400 and $3,589 and facility-related liabilities of $19,570 and $26,154, at October 2, 2016 and December 31, 2015, respectively. The decrease in restructuring liabilities for the nine months ended October 2, 2016, was primarily attributed to cash expenditures for termination benefits and facilities.

20. Operating Segment Information

The Company operates its business structure within three operating segments. These operating segments ("groups") are defined based on the reporting and review process used by the Company's chief executive officer and other management.  The operating structure aligns the Company's capabilities and resources with its customers and markets and positions the Company for long-term growth and improved profitability.

• Flight Systems Group develops rockets that are used as small- and medium-class space launch vehicles to place satellites into Earth orbit and escape trajectories, interceptor and target vehicles for missile defense systems and suborbital launch vehicles that place payloads into a variety of high-altitude trajectories. The group also develops and produces medium- and large-class rocket propulsion systems for human and cargo launch vehicles, strategic missiles, mi

24

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

ssile defense interceptors and target vehicles. Additionally, the group operates in the military and commercial aircraft and launch structures markets. Other products include illuminating flares and aircraft countermeasures.

• Defense Systems Group develops and produces small-, medium-, and large-caliber ammunition, precision weapons and munitions, high performance gun systems, and propellant and energetic materials. It operates the Lake City Army Ammunition Plant in Independence, Missouri ("LCAAP") and a Naval Sea Systems Command ("NAVSEA") facility in Rocket Center, West Virginia. Defense Systems Group is also a leader in tactical solid rocket motor development and production for a variety of air-, sea- and land-based missile systems. The group serves a variety of domestic and international customers in the defense and security markets in a prime contractor, partner or supplier role. Defense Systems Group also provides propulsion control systems that support Missile Defense Agency and NASA programs, airborne missile warning systems, advanced fuzes and defense electronics. The group produces the U.S. Navy's Advanced Anti-Radiation Guided Missile ("AARGM") and has developed advanced air-breathing propulsion systems and special-mission aircraft for defense applications.

• Space Systems Group develops and produces small- and medium-class satellites that are used to enable global and regional communications and broadcasting, conduct space-related scientific research and perform other activities related to national security. In addition, Space Systems Group develops and produces human-rated space systems for Earth-orbit and deep-space exploration, including delivering cargo to the International Space Station. This Group is also a provider of spacecraft components and subsystems and specialized engineering and operations services to U.S. Government agencies.

The following summarizes the Company's results by segment:

	Quarters Ended						Nine Months Ended
	October 2, 2016			October 4, 2015			October 2, 2016			October 4, 2015
				(As Restated)
Sales to external customers:
Flight Systems Group	$	360,531		$	356,131		$	1,081,513		$	1,040,076
Defense Systems Group	451,286			440,749			1,326,076			1,355,703
Space Systems Group	231,885			346,366			775,853			822,195
Total external sales	1,043,702			1,143,246			3,183,442			3,217,974
Intercompany sales:
Flight Systems Group	2,463			7,173			9,542			42,041
Defense Systems Group	4,668			1,488			14,396			18,892
Space Systems Group	16,661			5,021			37,497			14,532
Corporate	(23,792		)	(13,682		)	(61,435		)	(75,465		)
Total intercompany sales	—			—			—			—
Total sales	$	1,043,702		$	1,143,246		$	3,183,442		$	3,217,974
Income from continuing operations, before interest, income taxes and noncontrolling interest:
Flight Systems Group	$	43,886		$	94,015		$	151,454		$	186,247
Defense Systems Group	33,066			34,299			126,437			130,778
Space Systems Group	19,347			20,986			95,766			30,293
Corporate	(5,323		)	(12,490		)	(14,657		)	(105,356		)
Total income from continuing operations, before interest, income taxes and noncontrolling interest	$	90,976		$	136,810		$	359,000		$	241,962

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NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(Amounts in thousands except share and per share data, unless otherwise indicated)

	October 2, 2016		December 31, 2015
Total assets:
Flight Systems Group	$	2,307,885	$	2,223,787
Defense Systems Group	1,287,290		1,184,071
Space Systems Group	1,242,167		1,272,425
Corporate	528,750		643,412
Total assets	$	5,366,092	$	5,323,695

Certain administrative functions are primarily managed by the Company at the corporate headquarters ("Corporate"). Some examples of such functions are human resources, pension and postretirement benefits, corporate accounting, legal, tax and treasury. Significant assets and liabilities managed at Corporate include those associated with debt, restructuring, pension and postretirement benefits, environmental liabilities, litigation liabilities, strategic growth costs and income taxes.

Costs related to the administrative functions managed by Corporate are either recorded at Corporate or allocated to the segments based on the nature of the expense. The difference between pension and postretirement benefit expense calculated under U.S. GAAP and the expense calculated under U.S. Cost Accounting Standards is recorded at the corporate level which provides for greater clarity on the operating results of the business segments. Administrative expenses such as corporate accounting, legal and treasury costs are allocated out to the business segments. Environmental expenses are allocated to each segment based on the origin of the underlying environmental cost. Transactions between segments are recorded at the segment level, consistent with the Company's financial accounting policies. Intercompany balances and transactions involving different segments are eliminated at the Company's consolidated financial statements level and are shown above in Corporate. The amortization expense related to purchase accounting attributed to the acquisition of Orbital is also recorded in Corporate.

21. Subsequent Events

As a result of the Restatement, the Company was unable to timely file its Quarterly Reports on Form 10-Q with the SEC for the fiscal quarters ended July 3, 2016 and October 2, 2016 ("the 2016 Quarterly Reports"), as well as its Annual Report on Form 10-K for 2016. The Company has entered into an extension agreement with its Senior Credit Facility lender group to extend, until April 14, 2017, the deadline under its credit agreement for filing with the SEC the 2016 Quarterly Reports, as well as an Amended Form 10-Q for the fiscal quarter ended April 3, 2016 and the Company's Annual Report on Form 10-K for 2016. As a result of the extension, the Company is in compliance with the financial covenants as of the date of the filing of this Form 10-Q based on the Company's restated financial results.

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ITEM 2.    MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

(Amounts in thousands except share and per share data and unless otherwise indicated)

Restatement of Previously Issued Consolidated Financial Statements

In this Form 10-Q, we have restated our unaudited condensed consolidated statement of comprehensive income for the quarter ended October 4, 2015 as disclosed in the Company’s Amended Transition Report on Form 10-K/A ("Form 10-K/A") for the nine-month transition period ended December 31, 2015 filed on February 24, 2017 with the SEC. This Form 10-Q is reflective of the Restatement and should be read in conjunction with the Company’s consolidated financial statements and notes included in the Form 10-K/A for the nine-month transition period ended December 31, 2015. See Note 3 - Restatement in the Notes to the Condensed Consolidated Financial Statements in Part I, Item I - Financial Statements for additional information regarding the errors identified and the restatement adjustments made to the condensed consolidated financial statements.

Forward-looking Information is Subject to Risk and Uncertainty

Some of the statements made and information contained in this report, excluding historical information, are "forward-looking statements" as defined in the Private Securities Litigation Reform Act of 1995. Forward-looking statements give the Company's current expectations or forecasts of future events. Words such as "may," "will," "expected," "intend," "estimate," "anticipate," "believe," "project," or "continue," and similar expressions are used to identify forward-looking statements. From time to time, the Company also may provide oral or written forward-looking statements in other materials released to the public. Any or all forward-looking statements in this report and in any public statements the Company makes could be materially different. They can be affected by assumptions used or by known or unknown risks or uncertainties. Consequently, no forward-looking statements can be guaranteed. Actual results may vary materially. You are cautioned not to place undue reliance on any forward-looking statements. You should also understand that it is not possible to predict or identify all such factors and you should not consider the following list to be a complete statement of all potential risks and uncertainties. Any change in the following factors may impact the achievement of results:

• the effect of the Restatement of our previously issued financial results, and any actual or unasserted claims, investigations or proceedings as a result of the Restatement,

• our ability to remediate the material weaknesses in our internal controls over financial reporting described in Part I, Item 4, Controls and Procedures, of this Form 10-Q,

• reductions or changes in NASA or U.S. Government military spending, timing of payments and budgetary policies, including impacts of sequestration under the Budget Control Act of 2011 and sourcing strategies,

• intense competition for U.S. Government contracts and programs,

• increases in costs, which the Company may not be able to react to due to the nature of its U.S. Government contracts,

• changes in cost and revenue estimates and/or timing of programs,

• potential termination of U.S. Government contracts and the potential inability to recover termination costs,

• other risks associated with U.S. Government contracts that might expose the Company to adverse consequences,

• government laws and other rules and regulations applicable to the Company, including procurement and import-export control,

• reduction or change in demand and manufacturing costs for military and commercial ammunition,

• the manufacture and sale of products that create exposure to potential product liability, warranty liability or personal injury claims and litigation,

• risks associated with expansion into new and adjacent commercial markets,

• results of the Merger or other acquisitions or transactions, including our ability to successfully integrate acquired businesses and realize anticipated synergies, cost savings and other benefits, and costs incurred for pursuits and proposed acquisitions,

• greater risk associated with international business, including foreign currency exchange rates and fluctuations in those rates,

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• federal and state regulation of defense products and ammunition,

• costs of servicing the Company's debt, including cash requirements and interest rate fluctuations,

• actual pension and other postretirement plan asset returns and assumptions regarding future returns, discount rates, service costs, mortality rates and health care cost trend rates,

• security threats, including cyber-security and other industrial and physical security threats, and other disruptions,

• supply, availability and costs of raw materials and components, including commodity price fluctuations,

• performance of the Company's subcontractors,

• development of key technologies and retention of a qualified workforce,

• performance of our products,

• fires or explosions at any of the Company's facilities,

• government investigations and audits,

• environmental laws that govern current and past practices and rules and regulations, noncompliance with which may expose the Company to adverse consequences,

• impacts of financial market disruptions or volatility to the Company's customers and vendors,

• unanticipated changes in income taxes or exposure to additional tax liabilities, and

• costs and ultimate outcome of litigation matters, government investigations and other legal proceedings.

This list of factors is not exhaustive, and new factors may emerge or changes to the foregoing factors may occur that would impact our business. We undertake no obligation to update any forward-looking statements, except as required by law. A more detailed description of risk factors can be found in Part 1, Item 1A, Risk Factors, of the Company's Form 10-K/A. Additional information regarding these factors may be contained in the Company's subsequent filings with the Securities and Exchange Commission, including Forms 10-Q and 8-K. All such risk factors are difficult to predict, contain material uncertainties that may affect actual results, and may be beyond our control.

Executive Summary

We are an aerospace and defense systems company and supplier of products to the U.S. Government, allied nations, prime contractors and other customers. Our main systems and products include launch vehicles and related propulsion systems, satellites and associated components and services, composite aerospace structures, tactical missiles, subsystems and defense electronics and precision weapons, armament systems and ammunition. We are headquartered in Dulles, Virginia and have operating locations throughout the United States.

On February 9, 2015, we completed a tax-free spin-off and distribution of our former Sporting Group to our stockholders (the "Distribution") as a new public company called Vista Outdoor Inc. ("Vista Outdoor"). Immediately following the Distribution, we combined with Orbital Sciences Corporation ("Orbital") through the merger of a Company subsidiary with Orbital (the "Merger"). Following the Distribution and Merger, we changed our name from Alliant Techsystems Inc. to Orbital ATK, Inc.

We conduct business in three segments:

• Flight Systems Group develops rockets that are used as small- and medium-class space launch vehicles to place satellites into Earth orbit and escape trajectories, interceptor and target vehicles for missile defense systems and suborbital launch vehicles that place payloads into a variety of high-altitude trajectories. The group also develops and produces medium- and large-class rocket propulsion systems for human and cargo launch vehicles, strategic missiles, missile defense interceptors and target vehicles. In addition, the division produces advanced flares and decoys that provide illumination for search and rescue missions and countermeasures against missile attacks.

• Defense Systems Group develops and produces small-, medium-, and large-caliber military ammunition, propulsion systems for tactical missiles and missile defense applications, strike weapons, precision weapons and munitions, high-performance gun systems, aircraft survivability systems, fuzes and warheads, energetic materials and special mission aircraft.

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• Space Systems Group develops and produces small- and medium-class satellites that are used to enable global and regional communications and broadcasting, conduct space-related scientific research and perform other activities related to national security. In addition, Space Systems Group develops and produces human-rated space systems for Earth-orbit and deep-space exploration, including cargo delivery to the International Space Station. This group is also a provider of spacecraft components and subsystems and specialized engineering and operations services to U.S. government agencies.

Financial Highlights for the Quarter Ended October 2, 2016

• Quarterly sales of $1.04 billion.

• Diluted earnings per share of $1.04.

• New firm and option contract bookings of $1.7 billion and option exercises of $0.3 billion under existing contracts.

• Total backlog of $14.7 billion, at October 2, 2016.

• Income from continuing operations, before interest, income taxes and noncontrolling interest as a percentage of sales of 8.7%.

• Effective income tax rate of 18.0%.

• Paid quarterly dividend of $0.30 on September 22, 2016 to stockholders of record on September 7, 2016.

• Repurchased 576,407 shares for $43,800.

Critical Accounting Policies

The Company's significant accounting policies are described in Note 1 to the consolidated financial statements included in the Company’s Form 10-K/A and the same accounting policies are used in preparing the Company's interim condensed consolidated financial statements.

In preparing the consolidated financial statements, the Company follows accounting principles generally accepted in the United States. The preparation of these financial statements requires the Company to make estimates and judgments that affect the reported amounts of assets, liabilities, sales, expenses and related disclosure of contingent assets and liabilities. The Company re-evaluates its estimates on an on-going basis. The Company’s estimates are based on historical experience and on various other assumptions that are believed to be reasonable under the circumstances. Actual results may differ from these estimates under different assumptions or conditions.

More information on these policies can be found in Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations, of the Company's Form 10-K/A.

Results of Operations

The following information should be read in conjunction with our consolidated financial statements. The key performance indicators that management uses in managing the business are sales, income before interest and income taxes, and cash flows.

Sales, Cost of Sales, and Income (Loss) from Continuing Operations before Interest, Income Taxes and Noncontrolling Interest include intergroup sales and profit. Corporate and Eliminations include intergroup sales and profit eliminations and corporate expenses.

As a general note, results for the nine months ended October 2, 2016 include Orbital for the full nine months, whereas results for the nine months ended October 4, 2015 include Orbital after the Merger date of February 9, 2015.

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Sales

	Quarters Ended											Nine Months Ended
	October 2, 2016			October 4, 2015			Change			Percent Change		October 2, 2016			October 4, 2015			Change			Percent Change
				(As Restated)
Flight Systems Group	$	362,994		$	363,304		$	(310	)	(0.1	)	$	1,091,055		$	1,082,117		$	8,938		0.8	%
Defense Systems Group	455,954			442,237			13,717			3.1	%	1,340,472			1,374,595			(34,123		)	(2.5	)%
Space Systems Group	248,546			351,387			(102,841		)	(29.3	)%	813,350			836,727			(23,377		)	(2.8	)%
Corporate/Eliminations	(23,792		)	(13,682		)	(10,110		)	(73.9	)%	(61,435		)	(75,465		)	14,030			18.6	%
Total sales	$	1,043,702		$	1,143,246		$	(99,544	)	(8.7	)%	$	3,183,442		$	3,217,974		$	(34,532	)	(1.1	)%

Quarter:

Fluctuations in sales were driven by program-related changes within the operating segments as described below.

Flight Systems Group.    Sales were flat as higher sales of $14,400 in Aerospace Structure primarily due to increased production on composite aircraft components and increased activity in Launch Vehicles on the Commercial Resupply Services ("CRS") contract were partially offset by decreased activity in Launch Vehicles of $9,800 due to decreased activity on target vehicles and missile defense interceptors.

Defense Systems Group.    The increase was due to higher sales of $25,700 in Small Caliber Systems driven by higher volume of ammunition production and an increase of $4,500 in Missile Products primarily due to higher volume of fuze and warheads production partly offset by lower sales of $10,500 in Armament Systems due to decreased foreign sales and $7,400 in Defense Electronic due to termination of a contract.

Space Systems Group.    The decrease was due to lower sales of $21,700 in Commercial Satellites primarily due to lower contract activity, a decrease of $63,900 in Government Satellites due to decreased activity on CRS I partly offset by activity from a newly awarded CRS II contract and a decrease of $12,800 in Space Components mainly due to completion of a contract in late 2015.

Corporate.    The change in eliminations was driven primarily by higher intergroup sales.

Nine Months:

Fluctuations in sales were driven by program-related changes within the operating segments and the impact of the Merger as described below.

Flight Systems Group.    The increase was driven by higher sales volume of $30,700 in Aerospace Structure due to increased production on composite aircraft and launch vehicles components. The increase was also driven by the inclusion of Orbital's former Launch Vehicles segment, now referred to as Launch Vehicles Division, for the full nine months ended October 2, 2016; whereas, sales for the nine months ended October 4, 2015 include the results of Launch Vehicles Division beginning with the Merger. Launch Vehicles Division sales were $398,200 for the nine months ended October 2, 2016, compared to $355,500 for the nine months ended October 4, 2015. This increase was offset by decreased sales of $50,000 in Propulsion Systems primarily due to the termination of a commercial contract in 2015, as well as lower commercial rocket motor and booster production.

Defense Systems Group.   The decrease in sales was primarily due to a decrease of $76,200 in Armament Systems primarily due to lower international sales, partially offset by an increase of $35,500 in Small Caliber Systems due to higher volume of ammunition production.

Space Systems Group.    The decrease was primarily due to lower sales of $76,900 in commercial satellites due to lower contract activity and completion of a contract in early 2016 and $16,100 in space components mainly due to completion of a contract in late 2015. This decrease is partly offset by higher sales of $49,500 in government satellites due to increased activity on the newly awarded CRS II contract. The decrease is also partly offset by the inclusion of Orbital's former Advanced Space Programs and Satellite and Space Systems for the full nine months ended October 2, 2016; whereas, sales for the nine months ended October 4, 2015 include the results of former Advanced Space Programs and Satellite and Space Systems beginning with the Merger.

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Corporate.    The change in eliminations was driven primarily by lower intergroup sales from Defense Systems Group, due to the spin-off of Vista Outdoor as a result of the Distribution.

Cost of Sales

	Quarters Ended											Nine Months Ended
	October 2, 2016			October 4, 2015			Change			Percent Change		October 2, 2016			October 4, 2015			Change			Percent Change
				(As Restated)
Flight Systems Group	$	278,045		$	279,005		$	(960	)	(0.3	)%	$	812,889		$	824,336		$	(11,447	)	(1.4	)%
Defense Systems Group	379,696			366,130			13,566			3.7	%	1,087,106			1,111,785			(24,679		)	(2.2	)%
Space Systems Group	207,751			299,664			(91,913		)	(30.7	)%	647,838			693,498			(45,660		)	(6.6	)%
Corporate/Eliminations	(32,089		)	(10,370		)	(21,719		)	(209.4	)%	(81,337		)	(66,596		)	(14,741		)	(22.1	)%
Total cost of sales	$	833,403		$	934,429		$	(101,026	)	(10.8	)%	$	2,466,496		$	2,563,023		$	(96,527	)	(3.8	)%

Quarter:

The fluctuation in cost of sales was driven by program-related changes within the operating segments as described below.

Flight Systems Group.    The decrease in cost of sales was primarily due to lower cost of sales of $8,300 in Launch Vehicles Division primarily due to decreased activity on target vehicles and missile defense interceptors and a slight decrease in Propulsion Systems, partly offset by higher cost of sales of $12,500 in Aerospace Structure due to higher production on composite aircraft components.

Defense Systems Group.    The increase in cost of sales was primarily due to higher cost of sales of $27,400 in Small-Caliber Systems due to higher volume of ammunition production, partly offset by lower cost of sales of $8,300 in Defense Electronics mainly due to termination of a contract and $7,900 in Armament Systems that reflected decreased foreign sales.

Space Systems Group.    The decrease in cost of sales was due to lower cost of sales of $43,500 in Government Satellites due to decreased activity on the CRS I contract, a decrease of $33,800 in Commercial Satellites due to completion of a contract in early 2016 and decreased activity in other contracts and $8,200 in Space Systems Components due to completion of a contract in late 2015.

Corporate.    Cost of sales includes amortization of intangible assets recorded in connection with the Merger and the elimination of intercompany sales.

Nine Months:

The fluctuation in cost of sales was driven by program-related changes within the operating segments and the impact of the Merger as described below.

Flight Systems Group.    The decrease was primarily due to lower cost of sales of $38,900 in Propulsion Systems due to the termination of a commercial contract in 2015. The decrease was partly offset by higher cost of sales in Aerospace Structure of $17,800 due to increased production on composite aircraft and launch vehicles components. The decrease was also partly offset by the inclusion of Orbital's former Launch Vehicles segment, now referred to as Launch Vehicles Division, for the full nine months ended October 2, 2016; whereas, sales for the nine months ended October 4, 2015 include the results of Launch Vehicles Division beginning with the Merger. Launch Vehicles Division cost of sales were $293,700 for the nine months ended October 2, 2016, compared to $278,100 for the nine months ended October 4, 2015.

Defense Systems Group.    The decrease was primarily due to lower cost of sales of $72,700 in Armament Systems due to decreased international sales, partially offset by higher cost of sales of $40,000 in Small Caliber Systems due to higher volume of ammunition production.

Space Systems Group.    The decrease in cost of sales was primarily due lower cost of sales of $49,200 on Commercial Satellites due to decreased contract activity and completion of a contract in early 2016 and a decrease of $18,200 in Space Components due to completion of a contract in late 2015. This decrease was partly offset by higher cost of sales of $40,500 in government satellites due to increased activity on the newly awarded CRS II contract and the inclusion of Orbital's former Advanced Space Programs and Satellite and Space Systems segments for the full nine months ended October 2, 2016; whereas, cost of sales for the nine months ended October 4, 2015 include the results of those former Orbital segments beginning with the Merger.

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Corporate.    The change in corporate/eliminations was driven primarily by lower intergroup sales from Defense Systems Group, due to the spin-off of Vista Outdoor in the Distribution and higher amortization expense resulting from the Merger.

Operating Expenses

	Quarters Ended											Nine Months Ended
	October 2, 2016		Percent of Sales		October 4, 2015		Percent of Sales		Change			October 2, 2016		Percent of Sales		October 4, 2015		Percent of Sales		Change
					(As Restated)
Research and development	$	24,887	2.4	%	$	28,666	2.5	%	$	(3,779	)	$	80,418	2.5	%	$	78,698	2.4	%	$	1,720
Selling	28,099		2.7	%	28,137		2.5	%	(38		)	82,140		2.6	%	81,549		2.5	%	591
General and administrative	66,337		6.4	%	65,204		5.7	%	1,133			195,388		6.1	%	268,442		8.3	%	(73,054		)
Goodwill impairment	—		—	%	—		—		—			—		—	%	34,300		1.1	%	(34,300		)
Total operating expenses	$	119,323	11.5	%	$	122,007	10.7	%	$	(2,684	)	$	357,946	11.2	%	$	462,989	14.3	%	$	(105,043	)

Quarter:

Operating expenses decreased$2,684 in the quarter ended October 2, 2016 compared to the quarter ended October 4, 2015 primarily due to decreased research and development expenses in Space Systems related to commercial satellites and a decrease in Flight Systems related to Antares rocket partly offset by increased research and development expenses in new rocket motors.

Nine Months:

Operating expenses decreased$105,043 in the nine months ended October 2, 2016 compared to the nine months ended October 4, 2015 primarily due to $18,000 of transaction costs pertaining to the Merger and Distribution, $17,000 of restructuring charges, a $25,000 charge related to a lawsuit settlement and a goodwill impairment charge of $34,300 in the nine months ended October 4, 2015. These decreases were partially offset by an increase in research and development.

Income from Continuing Operations, Before Interest, Income Taxes and Noncontrolling Interest

	Quarters Ended									Nine Months Ended
	October 2, 2016			October 4, 2015			Change			October 2, 2016			October 4, 2015			Change
				(As Restated)
Flight Systems Group	$	43,886		$	94,015		$	(50,129	)	$	151,454		$	186,247		$	(34,793	)
Defense Systems Group	33,066			34,299			(1,233		)	126,437			130,778			(4,341		)
Space Systems Group	19,347			20,986			(1,639		)	95,766			30,293			65,473
Corporate/Eliminations	(5,323		)	(12,490		)	7,167			(14,657		)	(105,356		)	90,699
Total	$	90,976		$	136,810		$	(45,834	)	$	359,000		$	241,962		$	117,038

Quarter:

The fluctuations in income from continuing operations, before interest, income taxes and noncontrolling interest are described as follows:

Flight Systems Group.    The decrease in income was primarily due to a gain in 2015 from a $50,000 settlement of a dispute with a supplier pertaining to the Antares rocket used in the CRS I contract in 2015.

Defense Systems Group.    The decrease was due a change in product mix in Small Caliber Systems and Missile Products and lower sales in Armament Systems and increased research and development costs related to advanced ammunition projects.

Space Systems Group.    The decrease in income was primarily due to lower sales in Commercial Satellites and Space Components.

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Corporate.    Results reflect unallocated expenses incurred for administrative functions that are performed centrally at the corporate headquarters, amortization of intangible assets recorded in connection with the Merger and the elimination of intercompany profits.

Nine Months:

The fluctuations in income (loss) from continuing operations, before interest, income taxes and noncontrolling interest are described as follows:

Flight Systems Group.    The decrease in income was primarily due to a gain in 2015 from a $50,000 settlement of a dispute with a supplier pertaining to the Antares rocket used in the CRS I contract in 2015 and termination of a commercial contract in 2015. The decrease was partially offset by the impact of a favorable change in estimated profit adjustment on contracts and the inclusion of Orbital's former Launch Vehicles segment, now referred to as the Launch Vehicles Division, for the full nine months ended October 2, 2016; whereas, income for the nine months ended October 4, 2015 included the results of the Launch Vehicles Division only after the Merger Date.

Defense Systems Group.    The decrease in income was primarily due to lower sales in Armament Systems and Defense Electronic, partly offset by higher sales in Small Caliber Systems and Missile Products and the impact of a favorable change in estimated profit adjustment on contracts for the nine months ended October 2, 2016 compared to the nine months ended October 4, 2015.

Space Systems Group.    The increase in income was primarily due to the inclusion of Orbital's former Advanced Space Programs and Satellite and Space Systems segments for the full nine months ended October 2, 2016; whereas, income for the nine months ended October 4, 2015 included the results of those former Orbital segments only after the Merger. The increase was also due to the impact of favorable changes in estimated contract profit in the nine months ended October 2, 2016, compared to unfavorable changes in estimated contract profit in the nine months ended October 4, 2015. In addition, income increased due to a goodwill impairment charge of $34,300 for the nine months ended October 4, 2015.

Corporate.    The decrease in corporate expenses for the nine months ended October 2, 2016 compared to the nine months ended October 4, 2015 was largely driven by $18,000 of transaction costs pertaining to the Merger and Distribution, $17,000 of restructuring charges and a $25,000 charge related to a lawsuit settlement in the nine months ended October 4, 2015, reduced eliminations during the nine months ended October 2, 2016 driven primarily by lower intergroup sales from Defense Systems Group due to the spin-off of Vista Outdoor in the Distribution, partially offset by higher amortization expense in the nine months ended October 2, 2016 resulting from the Merger.

Changes in Estimates. The majority of the Company's sales are accounted for as long-term contracts, which are accounted for using the percentage-of-completion method. Accounting for contracts under percentage-of-completion requires judgment relative to assessing risks and estimating contract revenues and costs. Profits expected to be realized on contracts are based on management’s estimates of total contract sales value and costs at completion. Estimated amounts for contract changes, including scope and claims, are included in contract sales only when realization is probable. Assumptions used for recording sales and earnings are modified in the period of change to reflect revisions in contract value and estimated costs. In the period in which it is determined that a loss will be incurred on a contract, the entire amount of the estimated loss, based on gross profit along with general and administrative costs, is charged to cost of sales. Changes in estimates of contract value, costs or profits are recognized using the cumulative catch-up method of accounting. This method recognizes in the current period the cumulative effect of the changes on current or prior periods. The effect of the changes on future periods of contract performance is recognized as if the revised estimate had been used since contract inception.

Changes in contract estimates occur for a variety of reasons including changes in contract scope, unforeseen changes in contract cost estimates due to unanticipated cost growth or risks affecting contract costs and/or the resolution of contract risks at lower costs than anticipated, as well as changes in contract overhead costs over the performance period. Changes in estimates could have a material effect on the Company's consolidated financial position or annual results of operations. Aggregate net changes in contract estimates recognized using the cumulative catch-up method of accounting increased operating income by approximately $6,000 and $27,000 for the quarters ended October 2, 2016 and October 4, 2015, respectively. The changes in estimates for the quarter ended October 2, 2016 were primarily attributable to changes in scope on our contracts in all segments, primarily in Flight Systems Group. As disclosed in our Form 10-Q for the quarter ended July 3, 2016, $19,000 of net changes in contract estimates occurring during the quarter ended October 2, 2016 were recorded in the quarter ended July 3, 2016 due to the timing of issuance of those financial statements. The changes in estimates for the quarter ended October 4, 2015 were attributable to profit margin improvements in all segments, primarily in Flight Systems Group and Space Systems Group.

Aggregate net changes in contract estimates recognized using the cumulative catch-up method of accounting increased operating income by approximately $92,000 and $81,000 for the nine months ended October 2, 2016 and October 4, 2015,

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respectively. The changes in estimates for the nine months ended October 2, 2016 were attributable to profit margin improvements in all segments, primarily in Defense Systems Group and Flight Systems Group. The changes in estimates for the nine months ended October 4, 2015 were attributable to profit margin improvements in all segments, primarily Defense Systems Group and Flight Systems Group.

Net Interest Expense

Net interest expense for the quarter ended October 2, 2016 was $17,614, a decrease of $7,022 compared to $24,636 in the quarter ended October 4, 2015. Net interest expense for the nine months ended October 2, 2016 was $51,193, a decrease of $9,978 compared to $61,171 in the nine months ended October 4, 2015. The decrease in the quarter and nine months ended October 2, 2016 compared to October 4, 2015 was primarily due to accelerated amortization of deferred debt issuance costs related to refinancing our debt during the quarter ended October 4, 2015.

Income Taxes (from Continuing Operations)

	Quarters Ended											Nine Months Ended
	October 2, 2016		Effective Rate		October 4, 2015		Effective Rate		Change			October 2, 2016		Effective Rate		October 4, 2015		Effective Rate		Change
					(As Restated)
Income taxes	$	13,181	18.0	%	$	37,980	33.9	%	$	(24,799	)	$	79,765	25.9	%	$	61,563	39.9	%	$	18,202

Quarter:

The effective income tax rates for the quarters ended October 2, 2016 and October 4, 2015, were 18.0% and 33.9%, respectively. The decrease in the rate from the quarter ended October 4, 2015 is primarily due to increased benefits from the Research and Development tax credit, the true up of prior-year taxes, and settlement of the examination by the Internal Revenue Service ("IRS") of the fiscal 2013 and 2014 tax returns in the quarter ended October 2, 2016.

Nine Months:

The effective income tax rates for the nine months ended October 2, 2016 and October 4, 2015 were 25.9% and 39.9%, respectively. The decrease in the rate from the nine months ended October 4, 2015 is primarily due to the impact of goodwill impairment and nondeductible transaction costs in the nine months ended October 4, 2015, as well as increased benefits from the Domestic Manufacturing Deduction, increased Research and Development tax credits, the true up of prior-year taxes and settlement of the examination by the IRS of the fiscal 2013 and 2014 tax returns partially offset by an increase in state tax expense in the nine months ended October 2, 2016.

Income From Continuing Operations, Before Noncontrolling Interest

Net income from continuing operations before noncontrolling interest for the quarter ended October 2, 2016 was $60,181, a decrease of $14,013 compared to $74,194 in the quarter ended October 4, 2015. The decrease was due to a $50,000 gain on settlement with a supplier pertaining to the Antares rocket used in the CRS I contract in 2015.

Net income from continuing operations before noncontrolling interest for the nine months ended October 2, 2016 was $228,042, an increase of $135,440 compared to $92,602 in the nine months ended October 4, 2015. Net income (loss) from continuing operations before noncontrolling interest was lower in the nine months ended October 4, 2015 due to lower gross profit, higher general and administrative expenses, a goodwill impairment of $34,300, loss on extinguishment of debt of $26,600, and higher interest expense, partly offset by a gain on settlement of $50,000 with a supplier pertaining to the Antares rocket used in the CRS I contract in 2015.

Liquidity and Capital Resources

We manage our business to maximize operating cash flows as the primary source of liquidity. In addition to cash on hand and cash generated by operations, sources of liquidity include a credit facility, long-term borrowings, and access to the public debt and equity markets. We use our cash to fund investments in our existing core businesses and for debt repayment, cash dividends, share repurchases, acquisitions and other activities.

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Cash Flow Summary

Our cash flows from continuing operations for operating, investing and financing activities, as reflected in the condensed consolidated statements of cash flows are summarized as follows:

	Nine Months Ended
	October 2, 2016			October 4, 2015
Cash provided by operating activities of continuing operations	$	106,612		$	276,381
Cash (used in) provided by investing activities of continuing operations	(105,535		)	337,990
Cash used in financing activities of continuing operations	(42,098		)	(671,654		)
Net cash flows from continuing operations	$	(41,021	)	$	(57,283	)

Operating Activities

Cash provided by operating activities of continuing operations during the nine months ended October 2, 2016 was $106,612, compared to cash provided by operating activities of $276,381 during the nine months ended October 4, 2015. The decrease in operating cash flows resulted primarily from the net effect of changes in working capital and other assets and liabilities partially offset by $135,440 improvement in the income from continuing operations. During the nine months ended October 2, 2016, changes in working capital and other assets and liabilities used$262,343 of cash, comprised primarily of a $203,151 increase in net receivables, a $22,575 increase in net inventories, a $23,754 decrease in contract loss reserve, a $6,902 decrease in accrued compensation, a $7,622 decrease in pension and other postretirement benefits and a $88,146 change in other assets and liabilities, offset by a $50,434 decrease in income taxes receivable and a $39,373 increase in accounts payable.

During the nine months ended October 4, 2015, changes in working capital and other assets and liabilities used$25,508 of cash, comprised primarily of a $37,368 decrease in contract loss reserve and an $120,030 change in other assets and liabilities, offset by $37,388 decrease in income taxes receivable, a $36,644 decrease in net inventories, a $32,834 increase in accounts payable, a $19,407 decrease in net receivables, a $3,924 increase in accrued compensation and a $1,693 increase in pension and other postretirement benefits.

Investing Activities

Cash used in investing activities of continuing operations during the nine months ended October 2, 2016 was $105,535, compared to cash provided by investing activities during the nine months ended October 4, 2015 of $337,990. Capital expenditures during the nine months ended October 2, 2016 were $105,535, compared to $104,767 during the nine months ended October 4, 2015. Cash provided by investing activities during the nine months ended October 4, 2015 included $253,734 of cash acquired in the Merger with Orbital and a cash dividend of $188,878 received from Vista Outdoor in conjunction with the distribution of Sporting Group.

Financing Activities

Cash used in financing activities during the nine months ended October 2, 2016 was $42,098, compared to cash used in financing activities during the nine months ended October 4, 2015 of $671,654. Cash used in financing activities during the nine months ended October 2, 2016 consisted primarily of share repurchases of $94,992 and cash dividends of $52,586, partially offset by net borrowings on our Senior Credit Facility of $105,000.

Cash used in financing activities during the nine months ended October 4, 2015 consisted primarily of debt extinguishment payments of $1,746,260 and net payments on our Senior Credit Facility of $94,998 along with share purchases of $71,585 and cash dividends of $41,214, partially offset by cash provided of $1,287,000 from issuance of debt.

Liquidity

In addition to our normal operating cash requirements, our principal future cash requirements will be to fund capital expenditures, repay debt, satisfy employee benefit obligations, repurchase shares, pay dividends and complete any strategic acquisitions. Our short-term cash requirements for operations are expected to consist mainly of capital expenditures to maintain and expand production facilities and working capital requirements. Our debt service requirements over the next two years consist of principal payments due under the Senior Credit Facility, as discussed further below. Our other debt service requirements consist of interest expense on our debt.

During the nine months ended October 2, 2016, we paid dividends totaling $52,586. On November 1, 2016, our Board of Directors declared a dividend of $0.30 per share payable on December 1, 2016 to holders of record on November 16, 2016. The

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payment and amount of any future dividends are at the discretion of our Board of Directors and will be based on a number of factors, including our earnings, liquidity position, financial condition, capital requirements, credit ratings and the availability and cost of obtaining new debt. We cannot be certain that we will continue to declare dividends in the future and, as such, the amount and timing of any future dividends are not determinable.

Based on our current financial condition, we believe our cash position, combined with anticipated generation of cash flows, as well as the availability of funding, if needed, through our Senior Credit Facility, access to debt and equity markets, and potential future sources of funding such as additional bank financing and debt markets, will be adequate to fund future growth as well as service our anticipated long-term debt and pension obligations, make capital expenditures and pay dividends over the next 12 months.

We do not expect our access to liquidity sources will be materially impacted in the near future. There can be no assurance, however, that the cost or availability of future borrowings, if any, will not be materially impacted by capital market conditions.

Long-term Debt and Credit Facilities

As of October 2, 2016, we had outstanding total indebtedness of $1,595,000 and the potential of additional borrowings of up to $736,879 on our $1,000,000 Revolving Credit Facility, reduced for outstanding borrowings of $135,000 and letters of credit of $128,121.

Our outstanding indebtedness consisted of the following:

	October 2, 2016		December 31, 2015
Senior Credit Facility:
Term Loan A due 2020	$	760,000	$	790,000
Revolving Credit Facility due 2020	135,000		—
5.25% Senior Notes due 2021	300,000		300,000
5.50% Senior Notes due 2023	400,000		400,000
Principal amount of long-term debt	1,595,000		1,490,000
Unamortized debt issuance costs:
Senior Credit Facility	5,318		6,302
5.25% Senior Notes due 2021	1,668		1,915
5.50% Senior Notes due 2023	5,372		5,947
Unamortized debt issuance costs	12,358		14,164
Long-term debt less unamortized debt issuance costs	1,582,642		1,475,836
Less: Current portion of long-term debt	40,000		40,000
Long-term debt	$	1,542,642	$	1,435,836

See Note 12 "Long-term Debt" to the condensed consolidated financial statements in Part I, Item 1, Financial Statements, for a detailed discussion of these borrowings.

Covenants

As of October 2, 2016, our specified financial ratios that our Credit Agreement requires us to meet are as follows:

	Total Leverage Ratio (1)	Interest Coverage Ratio (2)
Requirement	4.00	3.00
Actual at October 2, 2016	2.46	15.08

____________________________________________________________

⁽¹⁾ Not to exceed the required financial ratio.

⁽²⁾ Not to be below the required financial ratio.

Total Leverage Ratio is the sum of our total debt plus financial letters of credit, net of up to $100,000 of cash, divided by Covenant EBITDA (which includes adjustments for items such as nonrecurring or extraordinary noncash items, noncash

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charges related to stock-based compensation and intangible asset impairment charges, as well as inclusion of EBITDA of acquired companies on a pro forma basis) for the past four fiscal quarters.

See Note 12 "Long-term Debt" to the condensed consolidated financial statements in Part I, Item 1, Financial Statements, for further discussion of the covenants in our debt agreements.

Our debt agreements contain cross-default provisions so that noncompliance with the covenants within one debt agreement could cause a default under other debt agreements as well. Our ability to comply with these covenants in the future and to meet and maintain the requisite financial ratios may be affected by events beyond our control.

Impact of the Restatement on Covenants

As a result of the Restatement, we were unable to timely file our Quarterly Reports on Form 10-Q with the SEC for the fiscal quarters ended July 3, 2016 and October 2, 2016 ("the 2016 Quarterly Reports"), as well as our Annual Report on Form 10-K for 2016. We have entered into an extension agreement with our Senior Credit Facility lender group to extend, until April 14, 2017, the deadline under our credit agreement for filing with the SEC the 2016 Quarterly Reports, as well as an Amended Form 10-Q for the fiscal quarter ended April 3, 2016 and our Annual Report on Form 10-K for 2016. As a result of the extension, we are in compliance with the financial covenants as of the date of the filing of this Form 10-Q based on the Company's restated financial results.

Share Repurchases

On March 11, 2015, our Board of Directors authorized us to repurchase up to the lesser of $75 million or 1.0 million shares of our common stock through December 31, 2015. On August 4, 2015, the Board of Directors increased the amount authorized for repurchase to the lesser of $100 million or 1.4 million shares. On October 29, 2015, the Board of Directors further increased the amount authorized for repurchase to the lesser of $250 million or 3.25 million shares through December 31, 2016. On November 1, 2016, the Board of Directors further increased the amount authorized for repurchase to the lesser of $300,000 or 4.0 million shares and extended the repurchase period through March 31, 2017. On February 27, 2017, the Board of Directors further increased the amount authorized for repurchase to $450,000 and extended the repurchase period through March 31, 2018. Under the authorized repurchase program, shares of our common stock may be purchased from time to time in the open market, subject to compliance with applicable laws and regulations and our debt covenants, depending upon market conditions and other factors. We purchased 576,407 shares for $43,750 and 1,104,511 shares for $87,991 during the quarter and nine months ended October 2, 2016, respectively, and 497,145 shares for $36,275 and 825,986 shares for $60,777 during the quarter and nine months ended October 4, 2015.

In accordance with the Transaction Agreement entered into on April 28, 2014, we did not repurchase any outstanding shares prior to the closing of the Distribution and Merger during the quarter ended March 31, 2015.

Authorized repurchases of our shares are subject to market conditions, our compliance with our debt covenants and the limitations imposed by the tax treatment of the Distribution and the related Tax Matters Agreement between us and Vista Outdoor. Our 5.25% Notes and 5.50% Notes limit the aggregate sum of dividends, share repurchases and other designated restricted payments to an amount based on our net income, stock issuance proceeds and certain other items since April 1, 2001, less restricted payments made since that date. As of October 2, 2016, the Senior Credit Facility allows us to make unlimited "restricted payments" (as defined in the Credit Agreement), which, among other items, allows payments for future share repurchases, as long as we maintain a certain amount of liquidity and maintain certain senior secured debt limits. When those requirements are not met, the limit is equal to $250,000 plus proceeds of any equity issuances plus 50% of net income since October 7, 2010. The Credit Agreement also prohibits dividend payments if loan defaults exist or the financial covenants contained in the agreement are not met.

Contractual Obligations and Commercial Commitments

There have been no material changes with respect to the contractual obligations and commitments or off-balance sheet arrangements described in our Form 10-K/A.

Contingencies

Environmental Liabilities.  Our operations and ownership or use of real property are subject to a number of federal, state, and local environmental laws and regulations, as well as applicable foreign laws and regulations, including those for discharge of hazardous materials, remediation of contaminated sites and restoration of damage to the environment. At certain sites that we own or operate or formerly owned or operated, there is known or potential contamination that we are required to investigate or remediate. We could incur substantial costs, including remediation costs, resource restoration costs, fines and penalties, or third party property damage or personal injury claims, as a result of liabilities associated with past practices or violations of environmental laws or noncompliance with environmental permits.

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The liability for environmental remediation represents management's best estimate of the present value of the probable and reasonably estimable costs related to known remediation obligations. The receivable represents the present value of the amount that we expect to recover, as discussed below. Both the liability and receivable have been discounted to reflect the present value of the expected future cash flows, using a discount rate of 0.2% and 0.7% as of October 2, 2016 and December 31, 2015, respectively. Our discount rate is calculated using the 20-year Treasury constant maturities rate, net of an estimated inflationary factor of 1.9%, rounded to the nearest quarter percent. The following is a summary of the amounts recorded for environmental remediation:

	October 2, 2016						December 31, 2015
	Liability			Receivable			Liability			Receivable
Amounts (payable) receivable	$	(43,939	)	$	19,762		$	(41,824	)	$	18,236
Unamortized discount	524			(179		)	1,718			(568		)
Present value amounts (payable) receivable	$	(43,415	)	$	19,583		$	(40,106	)	$	17,668

As of October 2, 2016, the estimated discounted range of reasonably possible costs of environmental remediation was $43,415 to $68,340.

We expect that a portion of our environmental compliance and remediation costs will be recoverable under U.S. Government contracts. Some of the remediation costs that are not recoverable from the U.S. Government that are associated with facilities purchased in a business acquisition are covered by various indemnification agreements, as described in Note 14 to the audited consolidated financial statements included in our Form 10-K/A for the nine month transition period ended December 31, 2015.

We have been identified as a potentially responsible party ("PRP"), along with other parties, in several regulatory agency actions associated with hazardous waste sites. As a PRP, we may be required to pay a share of the costs of the investigation and clean-up of these sites. While uncertainties exist with respect to the amounts and timing of the ultimate environmental liabilities, based on currently available information, we have concluded that these matters, individually or in the aggregate, will not have a material adverse effect on our operating results, financial condition or cash flows.

Other Contingencies. We are also subject to a number of other potential risks and contingencies. These risks and contingencies are described in Item 1A, Risk Factors, of Part I of our Form 10-K/A.

New Accounting Pronouncements

See Note 2 to the unaudited condensed consolidated financial statements in Item 1 of Part I, Financial Statements, of this report.

Inflation

In management's opinion, inflation has not had a significant impact upon the results of our operations. The selling prices under contracts, the majority of which are long-term, generally include estimated costs to be incurred in future periods. These cost projections can generally be negotiated into fixed-price government and commercial contracts, while actual cost increases are recoverable on cost-type contracts.

ITEM 3.    QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

There were no material changes in our market risk during the quarter ended October 2, 2016. For additional information, refer to Item 7A of Part II of our Form 10-K/A for the nine-month transition period ended December 31, 2015.

ITEM 4.   CONTROLS AND PROCEDURES

Internal Investigation

The Audit Committee of the Board of Directors, in consultation with senior management, determined that the Company should conduct an internal investigation, under its supervision, of the circumstances surrounding the misstatements in the accounting for the Lake City Contract and related matters. The investigation was undertaken by outside counsel, along with independent counsel for the Audit Committee. Counsel received assistance from outside forensic accountants. As disclosed in the Form 10-K/A, the investigation was previously completed.

Based on the internal investigation, the Audit Committee and senior management concluded as follows: Certain personnel at the Small Caliber Systems Division and, in some cases, Defense Systems Group, acted inappropriately and failed to adhere to the high standards established in the Company’s policies and expected by senior management and the Board of Directors.

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Specifically, with respect to the Lake City Contract: (a) there likely was a bias toward maintaining a targeted profit rate; (b) in some cases, there appears to have been inappropriate use of management reserves to maintain the targeted profit rate; (c) some members of the Small Caliber Systems Division finance staff failed to follow up and inquire further into indicators that cost overruns were occurring, and if such inquiries had been made, it could have led to further contemporaneous discussion and an earlier conclusion that the Lake City Contract was in a forward loss position; and (d) negative information was suppressed, and concerns at the Small Caliber Systems Division about cost overruns were not escalated appropriately to higher-level Company management or finance staff, nor were they communicated to the Audit Committee, the Board of Directors or the independent registered public accounting firms. The Lake City Contract is in a forward loss position, which means that it will result in a net loss over its total contract life. In addition to the investigation findings above, the Company’s identification of the forward loss was also delayed by a number of other factors which obscured the actual performance of the Lake City Contract, including migration to a new plant-wide software system at LCAAP, the unionization of employees at the LCAAP, and other factors. In response to the findings of the internal investigation, the Company has taken and will continue to take significant and comprehensive remedial actions which are described below under “Remediation Efforts to Address Material Weaknesses.”

As described in Note 3, “Restatement,” of the notes to consolidated financial statements contained in Part I, Item 1, Financial Statements, in this Form 10-Q, we have restated our consolidated financial statements for the quarterly period ended October 4, 2015.

In view of the Restatement, management conducted a comprehensive and intensive review of all relevant material contracts throughout the Company. No material adjustment to the accounting for any of these contracts was required as a result of this review, nor were any circumstances similar to those at the Small Caliber Systems Division discovered.

Disclosure Controls and Procedures

As of October 2, 2016, management of the Company, with the participation of its CEO and CFO, evaluated the effectiveness of the Company’s disclosure controls and procedures. We previously identified and disclosed material weaknesses in internal control over financial reporting. Management identified material weaknesses in our control environment related to (i) establishing and maintaining accounting policies and procedures related to complex transactions; and (ii) maintaining a sufficient complement of personnel with appropriate levels of accounting and controls knowledge, experience and training commensurate with the nature and complexity of our business and contract activity.

These material weaknesses in our control environment contributed to material weaknesses at the control activity level where we (iii) did not design appropriate controls to ensure completeness and accuracy of purchase accounting, specifically we did not maintain controls over measurement period adjustments and controls over the calculation of acquired contracts’ percentage-of-completion used to recognize revenue. In addition we (iv) did not maintain controls over the integration of accounting operations of the two merged companies and over the preparation, analysis and review of accounts of the combined business.

Also, (v) the Company did not maintain an effective control environment at our Defense Systems Group and its Small Caliber Systems Division. Specifically, the Small Caliber Systems Division did not maintain a control environment where procedures to escalate accounting issues to Defense Systems Group or Corporate management were followed, which led to the suppression of information by Small Caliber Systems Division management related to cost overruns and the override of certain controls due to pressure to achieve cost savings and maintain a targeted profit rate. This material weakness contributed to (vi) a material weakness at the Small Caliber Systems Division where the Small Caliber Systems Division did not design and maintain controls related to the preparation, review and approval of costs incurred and contract estimates used to determine revenue.

As a result of these material weaknesses in our internal control over financial reporting, which were not remediated as of October 2, 2016, our CEO and CFO concluded that our disclosure controls and procedures were not effective as of October 2, 2016.

Remediation Efforts to Address Material Weaknesses

The Board of Directors and management are fully committed to maintaining a strong internal control environment. The Company has taken and will continue to take significant and comprehensive remedial actions in response to the conduct and other factors that led to the Restatement, including actions to begin to remediate the material weaknesses in internal control over financial reporting.

We are performing an enterprise-wide controls improvement program for evaluation of controls across all significant locations utilizing a risk-based approach. We combined the two legacy companies’ controls frameworks and validated that where a risk of a material misstatement existed, key controls were identified to address the risk. In addition, we have taken meaningful steps to implement a number of key controls and processes to increase the oversight of the Company’s multiple businesses. We have taken the following specific remediation initiatives in response to the material weaknesses:

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Control Environment

• We evaluated our accounting organization and augmented our team with additional professionals with the appropriate levels of accounting and controls knowledge, experience and training. Our evaluation included benchmarking key accounting functions and resulted in the identification of a number of areas where the team needed to be augmented. As a result of this evaluation in the second and third quarters of fiscal 2016, we hired 11 additional accounting and controls professionals in key areas of technical accounting, general accounting oversight, business unit accounting, external reporting and controls. Each of these 11 new professionals is a CPA and 9 of the 11 have experience with a “Big 4” accounting firm. We will continue to evaluate our accounting organization and augment the team as appropriate.

• We revised our accounting policy for loss contracts to include general and administrative costs in the measurement of loss contracts.

• We designed an enterprise-wide process to timely identify, track and appropriately resolve and conclude on complex transactions and disclosures during the quarter ended October 2, 2016.

• Certain Small Caliber Systems Division personnel responsible for the inappropriate behaviors described under “Internal Investigation” above are no longer employed by the Company. In addition, certain members of the Defense Systems Group leadership will receive appropriate training, adverse compensation action and additional supervision.

• Additional accounting, controls and financial reporting personnel have been added to the Small Caliber Systems Division to take responsibility for its financial data forming part of the basis for preparation of these consolidated financial statements.

• We are increasing communication and training to employees regarding internal control over financial reporting, disclosure controls and procedures, and emphasizing the importance of adherence to our policies and procedures.

Control Activity- Level

• We redesigned, developed and implemented processes and controls over the execution of purchase accounting.

• We revised our account reconciliation policy and controls, including the timing of reconciliations, thresholds for review and the process for resolving reconciling items during the quarter ended October 2, 2016. We continue to monitor the reconciliation control execution and will make further changes as necessary. In addition, we implemented an enhanced company-wide balance sheet review process during the quarter ended October 2, 2016 to perform a more detailed analysis of accounts, including balance composition, fluctuation and trend analysis, which is performed at a segment level.

• We completed a detailed review of the Lake City Contract and the underlying estimates for its percentage-of-completion revenue recognition accounting model and developed extensive analysis and procedures to develop our management estimates going forward.

• We are designing and implementing enhancements to the internal controls related to the reconciliation and analysis of unbilled accounts receivable.

We believe the remediation steps outlined above have improved and will continue to improve the effectiveness of our internal control over financial reporting. While we have made meaningful progress on strengthening our internal controls relative to material weaknesses (i), (ii), and (iv), we have not fully tested all our remediation actions to verify the effectiveness of their design or operation. While we have taken measures to strengthen our internal controls related to material weaknesses (v) and (vi), which were identified beginning in February 2017, we have not fully completed our assessment of these additional controls.

Regarding material weakness (iii), which was identified as a material weakness in our internal control over financial reporting as of December 31, 2015, we have subsequently concluded that the Company completed the design and implementation of new purchase accounting controls, which have subsequently remediated material weakness (iii) during the quarter ended December 31, 2016.

The Board of Directors and management believe that the Company’s remediation actions will provide an appropriate control environment going forward once the material weaknesses disclosed herein are remediated and other actions described herein have been taken.

As our management continues to evaluate and work to improve our disclosure controls and procedures and internal control over financial reporting, we may determine to take additional measures to address these deficiencies or determine to modify certain of the remediation measures described above.

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Changes in Internal Control over Financial Reporting

The remediation efforts implemented during the quarter ended October 2, 2016, described in the Remediation Efforts to Address Material Weaknesses section above, were changes in the Company’s internal control over financial reporting (as defined in Rule 13a-15(f) under the Securities Exchange Act of 1934) that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting during the quarter ended October 2, 2016.

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PART II—OTHER INFORMATION

ITEM 1.    LEGAL PROCEEDINGS

From time to time, we are subject to various legal proceedings, including lawsuits, which arise out of, and are incidental to, the conduct of our business. We do not consider any of such proceedings that are currently pending, individually or in the aggregate, notwithstanding that the unfavorable resolution of any matter may have a material effect on our net earnings in any particular quarter, to be material to our business or likely to result in a material adverse effect on our future operating results, financial condition or cash flows.

Securities Class Action.    On August 12, 2016, a putative class action complaint, naming the Company, our Chief Executive Officer and our Chief Financial Officer as defendants, was filed in the United States District Court for the Eastern District of Virginia (Steven Knurr v. Orbital ATK, Inc., et al., No. 16-cv-01031 (TSE-MSN)). The class action complaint asserts claims on behalf of purchasers of Orbital ATK securities for violations of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 and Rule 10b-5 thereunder, arising out of allegedly false and misleading statements and the failure to disclose that: (i) the Company lacked effective control over financial reporting; and (ii) as a result, the Company failed to record an anticipated loss on its long-term contract with the U.S. Army to manufacture and supply small caliber ammunition at the U.S. Army’s Lake City Army Ammunition Plant. The complaint seeks a determination that this matter is a proper class action and certifying the plaintiff as the class representative, an award of damages, an award of reasonable costs and expenses of trial, including counsel and expert fees, and an award of such other relief as deemed appropriate by the Court. The Company intends to defend this action vigorously.

SEC Investigation.   The SEC is conducting a non-public investigation relating to our historical accounting practices as a result of the prior restatement of the Company’s unaudited condensed consolidated financial statements for the quarterly periods ended July 5, 2015 and October 4, 2015 as described in the Company's Amendment to the Transition Report on Form 10-K for the nine-month transition period ending December 31, 2015 filed on March 15, 2016. The Company has also voluntarily self-reported to the SEC regarding matters pertaining to the Restatement described in the Company's Amendment to the Form 10-K for the nine-month transition period ending December 31, 2015 filed on February 24, 2017. The Company is cooperating fully with the SEC in connection with these matters.

U.S. Government Investigations.    We are also subject to U.S. Government investigations from which civil, criminal or administrative proceedings could result. Such proceedings could involve claims by the U.S. Government for fines, penalties, compensatory and treble damages, restitution and/or forfeitures. Under government regulations, a company, or one or more of its operating divisions or subdivisions, can also be suspended or debarred from government contracts, or lose its export privileges, based on the results of investigations. We believe, based upon all available information, that the outcome of any such pending government investigations will not have a material adverse effect on our operating results, financial condition or cash flows.

Environmental Liabilities.    Our operations and ownership or use of real property are subject to a number of federal, state, and local laws and regulations, including those for discharge of hazardous materials, remediation of contaminated sites, and restoration of damage to the environment. Due in part to their complexity and pervasiveness, such laws and regulations have resulted in our company being involved with a number of related legal proceedings, claims and remediation obligations. We routinely assess, based on in-depth studies, expert analyses and legal reviews, our contingencies, obligations, and commitments for remediation of contaminated sites and past practices, including assessments of ranges and probabilities of recoveries from other responsible parties. Our policy is to accrue and charge to expense in the current period any identified exposures related to environmental liabilities based on estimates of investigation, cleanup, monitoring and resource restoration costs to be incurred.

We have been identified as a potentially responsible party ("PRP"), along with other parties, in several regulatory agency actions associated with hazardous waste sites. As a PRP, we may be required to pay a share of the costs of the investigation and clean-up of these sites. While uncertainties exist with respect to the amounts and timing of the ultimate environmental liabilities, based on currently available information, we have concluded that these matters, individually or in the aggregate, will not have a material adverse effect on our operating results, financial condition or cash flows.

We could incur substantial costs, including cleanup costs, resource restoration, fines, and penalties or third-party property damage or personal injury claims, as a result of violations or liabilities under environmental laws or noncompliance with environmental permits. While environmental laws and regulations have not had a material adverse effect on our operating results, financial condition or cash flows in the past, and we have environmental management programs in place to mitigate these risks, it is difficult to predict whether they will have a material impact in the future.

The description of certain environmental matters contained in Part I, Item 2, "Management’s Discussion and Analysis of Financial Condition and Results of Operations" under the heading "Contingencies," is incorporated herein by reference.

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ITEM 1A.    RISK FACTORS

While our attempts to identify, manage and mitigate risks and uncertainties associated with our business to the extent practical under the circumstances, some level of risk and uncertainty will always be present. Item 1A, Risk Factors, of Part I of our Amended Transition Report on Form 10-K/A for the nine-month transition period ended December 31, 2015, describes all known material risks and uncertainties associated with our business. These risks and uncertainties have the potential to materially affect our business, financial condition, results of operations, cash flows, projected results and future prospects.

ITEM 2.   UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

ISSUER PURCHASES OF EQUITY SECURITIES

Period	Total Number of Shares Purchased (1)	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Program (2)	Maximum Number of Shares that May Yet Be Purchased Under the Program (3)
July 4 - July 31	99,188	$	86.05	54,584
August 1 - August 28	198,775	74.31		198,569
August 29 - October 2	323,782	75.29		323,254
Quarter ended October 2, 2016	621,745	76.69		576,407	1,130,966

____________________________________________________________

⁽¹⁾  The 621,745 shares purchased include shares purchased during the quarter and shares withheld to pay taxes upon vesting of shares of restricted stock and restricted stock units or payment of performance shares that were granted under our incentive compensation plans.

⁽²⁾  During 2015, the Board approved a stock repurchase program that authorized the repurchase of up to the lesser of $250 million or 3.25 million shares through December 31, 2016. We repurchased 576,407 shares for $43,750 during the quarter ended October 2, 2016.

⁽³⁾  The maximum number of shares that may yet be purchased under the program was calculated using the Orbital ATK closing stock price of $76.23 on September 30, 2016.

The discussion of limitations upon the payment of dividends as a result of the indentures governing our debt instruments as discussed in Part I, Item 2, "Management's Discussion and Analysis of Financial Condition and Results of Operations" under the heading "Long-term Debt and Credit Facilities," is incorporated herein by reference.

ITEM 3.     DEFAULTS UPON SENIOR SECURITIES

Not applicable.

ITEM 4.   MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5.       OTHER INFORMATION

None.

43

ITEM 6.   EXHIBITS

Exhibit Number	Description of Exhibit (and document from which incorporated by reference, if applicable)
3(i).1	Restated Certificate of Incorporation of the Registrant, effective August 3, 2016.
3(i).2	Certificate of Elimination of Series A Junior Participating Preferred Stock of the Registrant dated August 3, 2016 (Exhibit 3.1 to Form 8-K dated August 3, 2016).
31.1	Certification of Chief Executive Officer.
31.2	Certification of Chief Financial Officer.
32	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	XBRL Instance Document.
101.SCH	XBRL Taxonomy Extension Schema Document.
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document.
101.LAB	XBRL Taxonomy Extension Labels Linkbase Document.
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document.
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document.

44

SIGNATURES

Pursuant to the requirements 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.

	ORBITAL ATK, INC.
April 7, 2017	By:	/s/ David W. Thompson
	Name:	David W. Thompson
	Title:	President and Chief Executive Officer
		(duly authorized and principal executive officer)

April 7, 2017	By:	/s/ Garrett E. Pierce
	Name:	Garrett E. Pierce
	Title:	Chief Financial Officer
		(principal financial officer)

45

EX-3.1

Exhibit 3(i).1

RESTATED CERTIFICATE OF INCORPORATION

OF

ORBITAL ATK, INC.

Pursuant to Section 245 of the

General Corporation Law of the State of Delaware

Orbital ATK, Inc., a corporation organized and existing under and by virtue of the General Corporation Law of the State of Delaware (the “Corporation”), hereby certifies that:

First: The name of the Corporation is Orbital ATK, Inc.; the Corporation originally incorporated on May 2, 1990 under the name “Metif Technology Inc.” The name of the Corporation was changed to “Honeywell Technology Inc.” by amendment to the Corporation’s Certificate of Incorporation on May 3, 1990, was changed to “Alliant Techsystems Inc.” by amendment to the Corporation’s Certificate of Incorporation on July 20, 1990 and was changed to “Orbital ATK, Inc.” by amendment to the Corporation’s Certificate of Incorporation on February 9, 2015.

Second: This Restated Certificate of Incorporation was duly adopted in accordance with Section 245 of the General Corporation Law of the State of Delaware and only restates and integrates and does not further amend the provisions of the Corporation’s Restated Certificate of Incorporation as heretofore restated, amended and supplemented. There is no discrepancy between those provisions and the provisions of this Restated Certificate of Incorporation.

Third: The text of the Restated Certificate of Incorporation of the Corporation, as amended, is hereby restated to read in full, as follows:

FIRST:     The name of the Corporation is Orbital ATK, Inc.

SECOND: The address of the registered office of the Corporation in the State of Delaware is 1209 Orange Street, in the City of Wilmington, County of New Castle 19801. The name of its registered agent at that address is The Corporation Trust Company.

THIRD: The purpose of the Corporation is to engage in, any lawful act or activity for which a corporation may be organized under the General Corporation Law of the State of Delaware as set forth in Title 8 of the Delaware Code (the “GCL”).

FOURTH: The total number of shares of all classes of stock which the Corporation shall have authority to issue is 185,000,000, of which 5,000,000 shares shall be Preferred Stock, par value $1.00 per share, and 180,000,000 shares shall be Common Stock, par value $.01 per share. Each share of Common Stock shall be entitled to one vote per share at annual and special meetings of the stockholders.

The Board of Directors is expressly authorized to provide for the issuance of all or any shares of the Preferred Stock in one or more classes or series, to increase or decrease the number of shares of Preferred Stock designated for any class or series, and to fix for each such class or series such voting powers, full or limited, or no voting powers, and such distinctive designations, preferences and relative, participating, optional or other special rights and such qualifications, limitations or restrictions thereof, as shall be stated and expressed in the resolution or resolutions adopted by the Board of Directors providing for the issuance of such class or series and as may be permitted by the GCL, including, without limitation, the authority to provide that any such class or series may be (i) subject to redemption at such time or times and at such price or prices (ii) entitled to receive dividends (which may be cumulative or non-cumulative and may be payable in cash, stock or other property) at such rates, on such conditions, and at such times, and payable in preference to, or in such relation to, the dividends payable on any other class or classes or any other series; (iii) entitled to such rights upon the dissolution of, or upon any distribution of the assets of, the Corporation; or (iv) convertible into, or exchangeable for, shares of any other class or classes of stock, or any other series of the same or any other class or classes of stock, or indebtedness or other property, of the Corporation at such price or prices or at such rates of exchange and with such adjustments; all as may be stated in such resolution or resolutions.

FIFTH: The business and affairs of the Corporation shall be managed by or under the direction of a Board of Directors consisting of such number of directors as is determined from time to time by resolution adopted by affirmative vote of a majority of the entire Board of Directors; provided, however, that in no event shall the number of directors be less than three. A director shall hold office until the next annual meeting following the election of the director and until his or her successor shall be elected and qualified, subject, however, to prior death, resignation, retirement, disqualification or removal from office. One-third of the total number of directors at the time of any regular or special meeting of the Board of Directors shall constitute a quorum for the transaction of business.

Whenever the holders of any one or more classes or series of stock issued by the Corporation shall have the right, voting separately by class or series, to elect directors at an annual or special meeting of stockholders, the election, term of office, filling of vacancies and other features of such directorships shall be governed by the terms of this Certificate of Incorporation applicable thereto.

SIXTH: The following provisions are inserted for the management of the business and the conduct of the affairs of the Corporation, and for further definition, limitation and regulation of the powers of the Corporation and of its directors and stockholders:

(1) The directors shall have concurrent power with the stockholders to make,     alter, amend, change, add to or repeal the By-Laws.

(2) Election of directors need not be by written ballot unless the By-Laws so     provide.

(3) In addition to the powers and authority hereinbefore or by statute expressly     conferred upon them, the directors are hereby empowered to exercise all such powers and     

do all such acts and things as may be exercised or done by the Corporation, subject, nevertheless, to the provisions of the GCL, this Certificate of Incorporation, and any By-Laws adopted by the stockholders; provided, however, that no By-Laws hereafter adopted by the stockholders shall invalidate any prior act of the directors which would have been valid if such By-Laws had not been adopted.

SEVENTH: Meetings of stockholders may be held within or without the State of Delaware, as the By-Laws may provide. The books of the Corporation may be kept (subject to any provision contained in the GCL) outside the State of Delaware at such place or places as may be designated from time to time by the Board of Directors or in the By-Laws.

EIGHTH: The Corporation reserves the right to amend, alter, change or repeal any provision contained in this Certificate of Incorporation, in the manner now or hereafter prescribed by statute, and all rights conferred upon stockholders herein are granted subject to this reservation.

NINTH: No director shall be personally liable to the Corporation or its stockholders for monetary damages for any breach of fiduciary duty by such director as a director. Notwithstanding the foregoing sentence, this provision shall not eliminate or limit the liability of a director to the extent provided by applicable law (i) for any breach of the director’s duty of loyalty to the Corporation or its stockholders, (ii) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (iii) under Section 174 of the GCL, or (iv) for any transaction from which the director derived an improper personal benefit. No amendment to or repeal of these provisions shall apply to or have any effect on the liability or alleged liability of any director of the Corporation for or with respect to any acts or omissions of such director occurring prior to such amendment or repeal.

Any contract, transaction or act of the Corporation or of the directors or of any committee which shall be ratified by a majority of a quorum of the stockholders having voting powers at any annual meeting, or at any special meeting called for such purpose, shall, so far as permitted by law and by this Certificate of Incorporation, be as valid and as binding as though ratified by every stockholder of the Corporation.

TENTH: The vote of stockholders and the approval of the Board of Directors required for any Business Combination (as hereinafter defined) shall be as set forth in this Article TENTH.

A. In addition to any affirmative vote required by law or this Certificate of Incorporation or the By-Laws of the Corporation, and except as otherwise expressly provided in, Section B of this Article TENTH, a Business Combination shall require the affirmative vote of not less than a majority of the votes entitled to be cast by the holders of all the then outstanding shares of Voting Stock (as hereinafter defined), voting together as a single class, excluding Voting Stock beneficially owned by any Interested Stockholder (as hereinafter defined). Such affirmative vote shall he required notwithstanding the fact that no vote may be required, or that a lesser percentage or separate class vote may be specified, by law or in any agreement with any national securities exchange or otherwise.

B. The provisions of Section A of this Article TENTH shall not be applicable to     any particular Business Combination, and such Business Combination shall require only such affirmative vote, if any, as is required by law or by any other provision of this Certificate of Incorporation or the By-Laws of the Corporation, or any agreement with any national securities exchange, if all of the conditions specified in either of the following Paragraphs 1 or 2 are met or, in the case of a Business Combination not involving the payment of consideration to the holders of the Corporation’s outstanding Capital Stock (as hereinafter defined), if the condition    specified in the following Paragraph 1 is met:

1.    The Business Combination shall have been approved by a majority         (whether such approval is made prior to or subsequent to the acquisition of         beneficial ownership of the Voting Stock that caused the Interested Stockholder to         become an Interested Stockholder) of the Continuing Directors (as hereinafter         defined).

2.    All of the following conditions shall have been met:

(a) The aggregate amount of cash and the Fair Market Value (as hereinafter defined), as of the date of the consummation of the Business Combination, of consideration other than cash to be received per share by holders of Common Stock in such Business Combination shall be at least equal to the highest amount determined under clauses (i) and (ii) below:

(i) (if applicable) the highest per share price (including any brokerage commissions, transfer taxes and soliciting dealers’ fees) paid by or on behalf of the Interested Stockholder for any share of Common Stock in connection with the acquisition by the Interested Stockholder of beneficial ownership of shares of Common Stock (x) within the two-year period immediately prior to the first public announcement of the proposed Business Combination (the “Announcement Date”) or (y) in the transaction in which it became an Interested Stockholder, whichever is higher, in either case as adjusted for any subsequent stock split, stock dividend, subdivision or reclassification with respect to Common Stock; and

(ii) the Fair Market Value per share of Common Stock on the Announcement Date or on the date on which the Interested Stockholder became an Interested Stockholder (the “Determination Date”), whichever is higher, as adjusted for any subsequent stock split, stock dividend, subdivision or reclassification with respect to Common Stock.

(b) The aggregate amount of cash and the Fair Market Value, as of the date of the consummation of the Business Combination, of consideration other than cash to be received per share by holders of shares of any class or series of outstanding Capital Stock, other than Common Stock, shall be at least equal to the highest amount determined under clauses (i), (ii) and (iii) below:

(i) (if applicable) the highest per share price (including any brokerage commissions, transfer taxes and soliciting dealers’ fees) paid by or on behalf of the Interested Stockholder for any share of such class or             series of Capital Stock in connection with the acquisition by the Interested    Stockholder of beneficial ownership of shares of such class or series of        Capital Stock (x) within the two-year period immediately prior to the        Announcement Date or (y) in the transaction in which it became an            Interested Stockholder, whichever is higher, in either case as adjusted lot        any subsequent stock split, stock dividend, subdivision or reclassification        with respect to such class or series of Capital Stock;

(ii) the Fair Market Value per share of such class or series of Capital Stock on the Announcement Date or on the Determination Date,whichever is higher, as adjusted for any subsequent stock split, stock dividend, subdivision or reclassification with respect to such class or series of Capital Stock and

(iii) (if applicable) the highest preferential amount per share to which the holders of shares of such class or series of Capital Stock would be entitled in the event of any voluntary or involuntary liquidation, dissolution or winding up of the affairs of the Corporation regardless of whether the Business Combination to be consummated constitutes such an event.

The provisions of this Paragraph 2(b) shall be required to be met with         respect to every class or series of outstanding Capital Stock, whether or not the         Interested Stockholder has previously acquired beneficial ownership of any shares         of a particular class or series of Capital Stock.

    (c) The consideration to be received by holders of a particular class or     series of outstanding Capital Stock shall be in cash or in the same form as         previously has been paid by or on behalf of the Interested Stockholder in connection with its direct or indirect acquisition of beneficial ownership of shares     of such class or series of Capital Stock. If the consideration so paid for shares of     any class or series of Capital Stock varied as to form, the form of consideration    for such class or series of Capital Stock shall be either cash or the form used to     acquire beneficial ownership of the largest number of shares of such class or     series of Capital stock previously acquired by the Interested Stockholder.

(d) After the Determination Date and prior to the consummation of such     Business Combination: (i) except as approved by a majority of the Continuing     Directors, there shall have been no failure to declare and pay at the regular date     therefor any full quarterly dividends (whether or not cumulative) payable in     accordance with the terms of     any outstanding Capital Stock; (ii) there shall have     been no reduction in the annual rate of dividends paid on the Common Stock     (except as necessary to reflect any stock split, stock     dividend or subdivision of the Common Stock), except as approved by a majority of the Continuing Directors;     (iii) there shall have been an increase in the annual rate of dividends paid on the     

Common Stock as necessary to reflect any reclassification (including any reverse stock split), recapitalization, reorganization or any similar transaction that has the     effect of reducing the number of outstanding shares of Common Stock, unless the     failure so to increase such annual rate is approved by a majority of the Continuing Directors; and (iv) such Interested Stockholder shall not have become the    Beneficial owner of any additional shares of capital Stock except as part of the     transaction that results in such Interested Stockholder becoming an Interested     Stockholder and except in a transaction that, after giving effect thereto, would not     result in any increase in the Interested stockholder’s percentage beneficial         ownership of any class or series of Capital Stock.

(e) After the Determination Date, such Interested Stockholder shall not     have received the benefit, directly or indirectly (except proportionately as a     stockholder of the Corporation), of any loans, advances, guarantees, pledges or     other financial assistance or any tax credits or other tax advantages provided by     the Corporation, whether in anticipation of or in connection with such Business     Combination or otherwise.

(f) A proxy or information statement describing the proposed Business     Combination and complying with the requirements of the Securities Exchange     Act of     1934 and the rules and regulations thereunder (the “Act”) (or any         subsequent provisions replacing such Act, rules or regulations) shall be mailed to     all stockholders of the Corporation at least 30 days prior to the consummation of     such Business Combination (whether or not such proxy or information statement     is required to be mailed pursuant to such Act or subsequent provisions). The     proxy or information statement shall contain on the first page thereof, in a     prominent place, any statement as to the advisability (or inadvisability) of the     Business Combination that the Continuing Directors, or any of them, may choose     to make and, if deemed advisable by a majority of the Continuing Directors, the     opinion of an investment banking firm selected by a majority of the Continuing     Directors as to the fairness (or not) of the terms of the Business Combination from a financial point of view to the holders of the outstanding shares of Capital Stock     other than the Interested Stockholder and its Affiliates or Associates (as     hereinafter defined), such investment firm to be paid a reasonable fee for its     services by the Corporation.

(g) Such Interested Stockholder shall not have made any major change in         the Corporation’s business or equity capital structure without the approval of a         majority of the Continuing Directors.

C. The following definitions shall apply with respect to this Article TENTH:

1. The term “Business Combination” shall mean:

(a) any merger or consolidation of the Corporation or any             Subsidiary (as hereinafter defined) with (i) any Interested Stockholder or         (ii) any other company (whether or not itself an Interested Stockholder)         

which is or after such merger or consolidation would be an Affiliate or         Associate of an Interested Stockholder; or

(b) any sale, lease, exchange, mortgage, pledge, transfer or other disposition or security arrangement, investment, loan, advance,             guarantee, agreement to purchase, agreement to pay, extension of credit,         joint venture participation or other arrangement (in one transaction or a         series of transactions) with or for the benefit of any Interested Stockholder     or any Affiliate or Associate of any Interested Stockholder involving any         assets, securities or commitments of the Corporation, any Subsidiary or         any Interested Stockholder or any Affiliate or Associate of any Interested         Stockholder having an aggregate Fair Market Value and/or involving         aggregate commitments of $10,000,000 or more; or

(c) the adoption of any plan or proposal for the liquidation or         dissolution of the Corporation which is voted for or consented to by any         Interested Stockholders, or

(d) any reclassification of securities (including any reverse stock split), or recapitalization of the Corporation, or any merger or consolidation of the Corporation with any of its Subsidiaries or any other transaction (whether or not with or otherwise involving an Interested Stockholder) that has the effect, directly or indirectly, of increasing the proportionate share of any class or series of Capital Stock, or any securities convertible into Capital Stock or into equity securities of any Subsidiary, that is beneficially owned by any Interested Stockholder or     any Affiliate or Associate of any Interested Stockholder; or

(e) any agreement, contract or other arrangement providing for         any one or more of the actions specified in the foregoing clauses (a) to (d).

2.     The term “Capital Stock” shall mean all capital stock of the     Corporation authorized to be issued from time to time under Article FOURTH     of this Certificate of Incorporation, and the term “Voting Stock” shall mean all     Capital Stock which by its terms may be voted on all matters submitted to         stockholders of the Corporation generally.

3.    The term “Person” shall mean any individual, firm, company or         other entity and shall include any group comprised of any person and any other         person with whom such person or any Affiliate or Associate of such person         has any agreement, arrangement or understanding, directly or indirectly, for         the purpose of acquiring, holding, voting or disposing of Capital Stock.

4.     The term “Interested Stockholder” shall mean any person (other     than the Corporation or any Subsidiary and other than any profit-sharing,         employee stock ownership or other employee benefit plan of the Corporation or     any Subsidiary or any     trustee of or fiduciary with respect to any such plan when     acting in such capacity) who (a) is the beneficial owner of Voting Stock

representing ten percent (10%) or more of the votes’ entitled to be cast by the holders of all then outstanding shares of Voting Stock; or (b) is an Affiliate or Associate of the Corporation and at any time within the two-year period         immediately prior to the date in question was the beneficial owner of Voting     Stock representing ten percent (10%) or more of the votes entitled to be cast by     the holders of     all then outstanding shares of Voting Stock.

5.      A person, shall be a “beneficial owner” of any Capital Stock (a)     which such person or any of its Affiliates or Associates beneficially owns,         directly or indirectly; (b) which such person or any of its Affiliates or Associates     has, directly or indirectly, (i) the right to acquire (whether such right is         exercisable immediately or subject only to the passage of time), pursuant to any     agreement, arrangement or understanding or upon the exercise of conversion     rights, exchange rights, warrants or options, or otherwise, or (ii) the right to vote     pursuant to any agreement, arrangement or understanding; or (c) which is         beneficially owned, directly or indirectly, by any other person with which such     person or any of its Affiliates or Associates has any agreement, arrangement or     understanding for the purpose of acquiring, holding, voting or disposing of any     shares of Capital Stock. For the purposes of determining whether a person is an     interested Stockholder pursuant to Paragraph 4 of this Section C, the number of     shares of Capital Stock deemed to be outstanding shall include shares deemed     beneficially owned by such person through application of this Paragraph 5 of     Section C, but shall not include any other shares of Capital Stock that may be     issuable pursuant to any agreement, arrangement or understanding, or upon     exercise of conversion rights, warrants or options, or otherwise.

6.     The terms “Affiliate” and “Associate” shall have the respective         meanings ascribed to such terms in Rule 12b-2 under the Act as in effect on June         18, 1985 (the term “registrant” in said Rule 12b-2 meaning in this case the         Corporation).

7.      The term “Subsidiary” means any company of which a majority of any class of equity security is beneficially owned by the Corporation provided,     however, that for the purposes of the definition of Interested Stockholder set forth     in Paragraph 4 of this     Section C, the term “Subsidiary” shall mean only a     company of which a majority of each class of equity security is beneficially     owned by the Corporation.

8.     The term “Continuing Director” means any member of the Board     of Directors of the Corporation (the “Board of Directors”), while such person is a     member of the Board of Directors, who is not an Affiliate or Associate or         representative of the Interested Stockholder and was a member of the Board of     Directors prior to the time that the Interested Stockholder became an Interested     Stockholder, and any successor of a Continuing Director while such successor is     a member of the Board of Directors, who is not an Affiliate or Associate or     

representative of the Interested Stockholder and is recommended or elected to     succeed the Continuing Director by a majority of Continuing Directors.

9.     The term “Fair Market Value” means (a) in the case of cash, the     amount of such cash; (b) in the case of stock, the highest closing sale price during     the 30-day period immediately preceding the date in question of a share of such     stock on the Composite Tape for New York Stock Exchange-Listed Stocks, or, if     such stock is not quoted on the Composite Tape, on the New York Stock         Exchange, or, if such stock is not listed on such Exchange, on the principal United States securities exchange registered under the Act On which such stock is     listed, or, if such stock is not listed on any such exchange, the highest closing     bid quotation with respect to a share of such stock during the 30-day period     preceding the date in question on the National Association of Securities Dealers,     Inc. Automated Quotations System or any similar system then in use, or if no     such quotations are available, the fair market value on the date in question of a     share of such stock as     determined by a majority of the Continuing Directors in     good faith; and (c) in the case of property other than cash or stock, the fair market     value of such property on the date in     question as determined in good faith by a     majority of the Continuing Directors.

10.     In the event of any Business Combination in which the         Corporation survives,     the phrase “consideration other than cash to be received” as used in Paragraph 2(a) and 2(b) of Section B of this Article TENTH shall         include the shares of Common Stock     and/or the shares of any other class or series     of Capital Stock retained by the holders of such shares.

D. A majority of the Continuing Directors shall have the power and duty to     determine for the purposes of this Article TENTH on the basis of information known to them after reasonable inquiry, (a) whether a person is an Interested Stockholder, (b) the     number of shares of Capital Stock or other securities beneficially owned by any person, (e) whether a person is an Affiliate or Associate of another, and (d) whether the assets that are the subject of any Business Combination have, or the consideration to be     received for the issuance or transfer of securities by the Corporation or any Subsidiary in any Business Combination has, an aggregate Fair Market Value of $10,000,000 or more. Any such determination made in good faith shall be binding and conclusive on all parties.

E. Nothing contained in this Article TENTH shall be construed to relieve any     Interested Stockholder from any fiduciary obligation imposed by law.

F. The fact that any Business Combination complies with the provisions of     Section B of this Article TENTH shall not be construed to impose any fiduciary duty,     obligation or responsibility on the Board of Directors, or any member thereof, to approve     such Business Combination or recommend its adoption or approval to the stockholders of the Corporation, nor shall such compliance limit, prohibit or otherwise restrict in any manner the Board of Directors, or any member thereof, with respect to evaluation of or actions end responses taken with respect to such Business Combination.

G. Notwithstanding any other provisions of this Certificate of Incorporation or     the By-Laws of the Corporation (and notwithstanding the fact that a lesser percentage or     separate class vote may be specified by law, this Certificate of Incorporation or the By-Laws of the Corporation), the affirmative vote of the holders of not less than a majority of the votes entitled to be cast by the holders of all the then outstanding shares of Voting Stock, voting together as a single class, excluding Voting Stock beneficially owned by any Interested Stockholder, shall be required to amend or repeal, or adopt any provisions inconsistent with, this Article TENTH; provided, however, that this Section G shall not apply to, and such majority vote shall not be required for, any amendment, repeal or adoption unanimously recommended by the Board of Directors if all of such directors are persons who would be eligible to serve as Continuing Directors within the meaning of Section C, Paragraph 8 of this Article TENTH.

IN WITNESS WHEREOF, the undersigned, being duly authorized on behalf of the Corporation, has executed this Restated Certificate of Incorporation as of August 3, 2016.

ORBITAL ATK, INC.

By:    /s/ Thomas E. McCabe

Thomas E. McCabe

Senior Vice President,

General Counsel and Secretary

EX-31.1

Exhibit 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

I, David W. Thompson, certify that:
1.	I have reviewed this quarterly report on Form 10-Q of Orbital ATK, Inc.;
2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.	The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
	a)	Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
	b)	Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
	c)	Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
	d)	Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.	The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
	a)	All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
	b)	Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

April 7, 2017	By:	/s/ David W. Thompson
	Name:	David W. Thompson
	Title:	President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, Garrett E. Pierce, certify that:
1.	I have reviewed this quarterly report on Form 10-Q of Orbital ATK, Inc.;
2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.	The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
	a)	Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
	b)	Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
	c)	Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
	d)	Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.	The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
	a)	All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
	b)	Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

April 7, 2017	By:	/s/ Garrett E. Pierce
	Name:	Garrett E. Pierce
	Title:	Chief Financial Officer

EX-32

Exhibit 32

Certification by Chief Executive Officer and Chief Financial Officer

Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

We, David W. Thompson, President and Chief Executive Officer, and Garrett E. Pierce, Chief Financial Officer, of Orbital ATK, Inc. (the “Company”), certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to our knowledge:

(1) the Quarterly Report on Form 10-Q for the period ended October 2, 2016 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods expressed in the Report.

April 7, 2017	By:	/s/ David W. Thompson
	Name:	David W. Thompson
	Title:	President and Chief Executive Officer
	By:	/s/ Garrett E. Pierce
	Name:	Garrett E. Pierce
	Title:	Chief Financial Officer

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Document and Entity Information - shares	9 Months Ended
	Oct. 02, 2016	Apr. 05, 2017
Document and Entity Information
Entity Registrant Name	ORBITAL ATK, INC.
Entity Central Index Key	0000866121
Document Type	10-Q
Document Period End Date	Oct. 02, 2016
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		57,653,024
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q3

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Oct. 04, 2015	Oct. 02, 2016	Oct. 04, 2015
Income Statement [Abstract]
Sales	$ 1,043,702	$ 1,143,246	$ 3,183,442	$ 3,217,974
Cost of sales	833,403	934,429	2,466,496	2,563,023
Gross profit	210,299	208,817	716,946	654,951
Operating expenses:
Research and development	24,887	28,666	80,418	78,698
Selling	28,099	28,137	82,140	81,549
General and administrative	66,337	65,204	195,388	268,442
Goodwill impairment	0	0	0	34,300
Gain on settlement	0	50,000	0	50,000
Income from continuing operations, before interest, income taxes and noncontrolling interest	90,976	136,810	359,000	241,962
Net interest expense	(17,614)	(24,636)	(51,193)	(61,171)
Loss on extinguishment of debt	0	0	0	(26,626)
Income from continuing operations, before income taxes and noncontrolling interest	73,362	112,174	307,807	154,165
Income taxes	13,181	37,980	79,765	61,563
Income from continuing operations, before noncontrolling interest	60,181	74,194	228,042	92,602
Less net (loss) income attributable to noncontrolling interest	(135)	147	(311)	72
Income from continuing operations of Orbital ATK, Inc.	60,316	74,047	228,353	92,530
Discontinued operations:
Income from discontinued operations, before income taxes	0	0	0	17,504
Income taxes	0	0	0	667
Income from discontinued operations	0	0	0	16,837
Net income attributable to Orbital ATK, Inc.	$ 60,316	$ 74,047	$ 228,353	$ 109,367
Basic earnings per common share from:
Continuing operations, basic (in dollars per share)	$ 1.04	$ 1.26	$ 3.92	$ 1.69
Discontinued operations, basic (in dollars per share)	0.00	0.00	0.00	0.31
Net income attributable to Orbital ATK, Inc., basic (in dollars per share)	$ 1.04	$ 1.26	$ 3.92	$ 2.00
Weighted-average number of common shares outstanding (in shares)	57,927	58,746	58,213	54,807
Diluted earnings per common share from:
Continuing operations, diluted (in dollars per share)	$ 1.04	$ 1.25	$ 3.89	$ 1.68
Discontinued operations, diluted (in dollars per share)	0.00	0.00	0.00	0.30
Net income attributable to Orbital ATK, Inc., diluted (in dollars per share)	$ 1.04	$ 1.25	$ 3.89	$ 1.98
Weighted-average number of diluted common shares outstanding (in shares)	58,257	59,304	58,642	55,228
Cash dividends per common share (in dollars per share)	$ 0.30	$ 0.26	$ 0.90	$ 0.84
Comprehensive income (loss):
Net income attributable to Orbital ATK, Inc. and noncontrolling interest	$ 60,181	$ 74,194	$ 228,042	$ 109,439
Pension and other postretirement benefit liabilities:
Reclassification of prior service credits for pension and postretirement benefit plans recorded to net income, net of tax (expense) benefit of $(12,500) and $2,691, $(7,547) and $8,258, respectively	20,215	(4,335)	12,284	(13,291)
Reclassification of net actuarial loss for pension and postretirement benefit plans recorded to net income, net of tax (expense) of $(11,146), $(14,196), $(35,578) and $(2,245), respectively	17,861	22,870	56,968	4,328
Valuation adjustment for pension and postretirement benefit plans, net of tax (expense) benefit of $0, $0, $(648) and $139,583, respectively	0	0	1,025	(224,389)
Change in fair value of derivatives, net of tax (expense) benefit of $(563), $1,896, $(2,097) and $1,276 respectively	890	(2,996)	3,315	(2,032)
Other, net of tax (expense) benefit of $(190), $55, $(292) and $93, respectively	472	(88)	1,076	(153)
Change in cumulative translation adjustment, net of tax (expense) of $(9,650)	0	0	0	(21,381)
Total other comprehensive income (loss)	39,438	15,451	74,668	(256,918)
Comprehensive income (loss)	99,619	89,645	302,710	(147,479)
Less comprehensive (loss) income attributable to noncontrolling interest	(135)	147	(311)	72
Comprehensive income (loss) attributable to Orbital ATK, Inc.	$ 99,754	$ 89,498	$ 303,021	$ (147,551)

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Oct. 04, 2015	Oct. 02, 2016	Oct. 04, 2015
Pension and other postretirement benefit liabilities:
Reclassification of prior service credits for pension and postretirement benefit plans recorded to net income, tax benefit (expense)	$ (12,500)	$ 2,691	$ (7,547)	$ 8,258
Reclassification of net actuarial loss for pension and postretirement benefit plans recorded to net income, tax benefit (expense)	(11,146)	(14,196)	(35,578)	(2,245)
Valuation adjustment for pension and postretirement benefit plans, tax benefit (expense)	0	0	(648)	139,583
Change in fair value of derivatives, tax benefit (expense)	(563)	1,896	(2,097)	1,276
Other Comprehensive Income, other, tax benefit (expense)	(190)	55	(292)	93
Change in cumulative translation adjustment, tax benefit (expense)	$ 0	$ 0	$ 0	$ (9,650)

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CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands	Oct. 02, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 63,011	$ 104,032
Net receivables	1,864,826	1,670,821
Net inventories	230,087	213,212
Income taxes receivable	335	50,769
Other current assets	86,081	89,645
Total current assets	2,244,340	2,128,479
Net property, plant and equipment	769,450	761,694
Goodwill and net intangibles	1,940,635	1,975,522
Other noncurrent assets	411,667	458,000
Total assets	5,366,092	5,323,695
Current liabilities:
Current portion of long-term debt	40,000	40,000
Accounts payable	170,756	130,812
Accrued compensation	117,790	127,928
Contract loss reserve	200,569	235,841
Other current liabilities	623,465	719,854
Total current liabilities	1,152,580	1,254,435
Long-term debt	1,542,642	1,435,836
Pension and other postretirement benefits	699,162	820,834
Other noncurrent liabilities	119,974	127,152
Total liabilities	3,514,358	3,638,257
Commitments and contingencies (Notes 13 and 16)
Common stock—$.01 par value: authorized—180,000,000 shares; issued and outstanding— 57,892,300 shares at October 2, 2016 and 58,729,995 shares at December 31, 2015	579	587
Additional paid-in-capital	2,173,099	2,187,940
Retained earnings	1,218,814	1,043,043
Accumulated other comprehensive loss	(711,209)	(785,908)
Common stock in treasury, at cost—11,042,724 shares held at October 2, 2016 and 10,205,029 shares held at December 31, 2015	(840,042)	(771,029)
Total Orbital ATK, Inc. stockholders' equity	1,841,241	1,674,633
Noncontrolling interest	10,493	10,805
Total equity	1,851,734	1,685,438
Total liabilities and equity	$ 5,366,092	$ 5,323,695

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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Oct. 02, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares	180,000,000	180,000,000
Common stock, issued shares	57,892,300	58,729,995
Common stock, outstanding shares	57,892,300	58,729,995
Common stock in treasury, shares	11,042,724	10,205,029

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 02, 2016	Oct. 04, 2015
Operating Activities
Net income	$ 228,042	$ 109,439
Net loss from discontinued operations	0	(16,837)
Income from continuing operations, before noncontrolling interest	228,042	92,602
Adjustments to reconcile income from continuing operations to cash provided by operating activities of continuing operations:
Depreciation and amortization	120,251	120,816
Amortization and write-off of deferred financing costs	1,806	12,481
Fixed asset impairment	4,809	14,833
Deferred income taxes	(12,110)	(25,254)
Goodwill impairment	0	34,300
Loss on the extinguishment of debt	0	26,626
Stock-based plans expense	17,516	28,369
Other	8,641	(2,884)
Change in assets and liabilities:
Net receivables	(203,151)	19,407
Net inventories	(22,575)	36,644
Income taxes receivable	50,434	37,388
Accounts payable	39,373	32,834
Contact loss reserve	(23,754)	(37,368)
Accrued compensation	(6,902)	3,924
Pension and other postretirement benefits	(7,622)	1,693
Other assets and liabilities	(88,146)	(120,030)
Cash flows provided by operating activities of continuing operations	106,612	276,381
Cash flows provided by operating activities of discontinued operations	0	10,741
Cash flows provided by operating activities	106,612	287,122
Investing Activities
Capital expenditures	(105,535)	(104,767)
Cash acquired in Merger with Orbital	0	253,734
Cash dividend received from Vista Outdoor, net of cash transferred to Vista Outdoor in conjunction with the Distribution of Sporting Group	0	188,878
Other	0	145
Cash flows (used in) provided by investing activities of continuing operations	(105,535)	337,990
Cash flows provided by investing activities of discontinued operations	0	49
Cash flows (used in) provided by investing activities	(105,535)	338,039
Financing Activities
Borrowings on revolving credit facilities	800,000	723,000
Payments on revolving credit facilities	(665,000)	(773,000)
Payment of long-term debt	(30,000)	(44,998)
Payments made to extinguish debt	0	(1,746,260)
Proceeds from issuance of debt	0	1,287,000
Payments made for debt issuance costs	0	(9,078)
Purchase of treasury shares	(94,992)	(71,585)
Dividends paid	(52,586)	(41,214)
Other	480	4,481
Cash flows used in financing activities	(42,098)	(671,654)
Effect of foreign exchange rate fluctuations on cash	0	(1,340)
Decrease in cash and cash equivalents	(41,021)	(47,833)
Cash and cash equivalents at beginning of period	104,032	112,920
Cash and cash equivalents at end of period	63,011	65,087
Noncash investing and operating activity:
Capital expenditures included in accounts payable	3,727	5,296
Noncash financing and operating activity:
Debt issuance costs included in accounts payable	0	819
Treasury shares purchased included in accounts payable	$ 2,859	$ 2,159

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Basis of Presentation and Responsibility for Interim Financial Statements

9 Months Ended

Oct. 02, 2016

Accounting Policies [Abstract]

Basis of Presentation and Responsibility for Interim Financial Statements

Basis of Presentation and Responsibility for Interim Financial Statements

The unaudited condensed consolidated financial statements of Orbital ATK, Inc. ("the Company" or "Orbital ATK") as set forth in this quarterly report have been prepared in accordance with the requirements of the U.S. Securities and Exchange Commission ("SEC") for interim reporting. As permitted under those rules, certain footnotes and other financial information that are normally required by accounting principles generally accepted in the United States can be condensed or omitted. The Company's accounting policies are described in the notes to the consolidated financial statements in its Amended Transition Report on Form 10-K/A ("Form 10-K/A") for the nine-month transition period ended December 31, 2015 filed on February 24, 2017 with the SEC. Management is responsible for the unaudited condensed consolidated financial statements included in this document. The unaudited condensed consolidated financial statements included in this document, in the opinion of management, include all adjustments necessary for a fair statement of the Company’s financial position as of October 2, 2016, its results of operations for the quarter and nine months ended October 2, 2016 and October 4, 2015 and cash flows for the nine months ended October 2, 2016 and October 4, 2015. The condensed consolidated balance sheet as of December 31, 2015 was derived from the audited financial statements included in the Form 10-K/A but does not include all of the information and footnotes required by Generally Accepted Accounting Principles ("U.S. GAAP") for complete financial statements.

On February 9, 2015, the Company completed a tax-free spin-off of and distribution of its former Sporting Group to its stockholders (the "Distribution") as a new public company called Vista Outdoor Inc. ("Vista Outdoor"). Immediately following the Distribution, the Company combined with Orbital Sciences Corporation ("Orbital") through the merger of a Company subsidiary with Orbital (the "Merger"). These transactions are discussed in greater detail in Note 5. Following the Distribution and Merger, the Company changed its name from Alliant Techsystems Inc. to Orbital ATK, Inc.

As a result of the Distribution, Sporting Group is no longer reported within the Company's results from continuing operations but is reported as a discontinued operation for all prior periods presented. The Company used the acquisition method to account for the Merger; accordingly, the results of Orbital have been included in the Company's condensed consolidated financial statements since the date of the Merger.

Following the Distribution and Merger, the Company reorganized its business groups and realigned its reporting segments. The Company's remaining businesses, combined with the businesses of Orbital, are now reported in three segments: Flight Systems Group, Defense Systems Group and Space Systems Group, as discussed in Note 20. The business comprising Sporting Group is presented as a discontinued operation - see Note 5.

Sales, expenses, cash flows, assets and liabilities can and do vary during the year. Therefore, the results and trends in these interim financial statements may not be the same as those for the full year. Certain reclassifications have been made to prior year amounts to conform to current year presentation.

This Form 10-Q should be read in conjunction with the Company's consolidated financial statements and notes included in its Form 10-K/A.

Fiscal Year Change and the presentation of the Nine Months Ended October 4, 2015. On March 10, 2015, the Company's Board of Directors approved a change in the Company's fiscal year end from March 31 to a calendar year ending on December 31 of each year. The Company's interim quarterly periods are based on 13-week periods and ending on the Sunday closest to the last calendar day of each of March, June and September. The Company filed a Transition Report on Form 10-K for the nine-month transition period ended December 31, 2015 on March 15, 2016, which was subsequently amended on February 24, 2017. Information in this document referring to the nine months ended October 4, 2015, includes the Company's restated results for the quarters ended March 31, 2015, July 5, 2015 and the quarter ended October 4, 2015 as disclosed in the Company's Form 10-K/A. Additionally, the restated results for the quarter ended March 31, 2015 were also reported in the Amended Quarterly Report on Form 10-Q for the quarter ended April 3, 2016 (filed with the SEC on April 3, 2017).

Restatement of Previously Issued Unaudited Condensed Consolidated Financial Statements. In this Form 10-Q, the Company has restated its unaudited condensed consolidated statement of comprehensive income for the quarter ended October 4, 2015 as disclosed in the Company’s Form 10-K/A.

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New Accounting Pronouncements

9 Months Ended

Oct. 02, 2016

Accounting Policies [Abstract]

New Accounting Pronouncements

New Accounting Pronouncements

Accounting Standards Updates Adopted

In March 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2016-09, Compensation-Stock Compensation (Topic 718) Improvements to Employee Share-Based Payment Accounting, which requires the recognition of the income tax effects of awards in the income statement when the awards vest or are settled, thus eliminating additional paid in capital pools. The guidance also allows for the employer to repurchase a greater number of an employee's shares for tax withholding purposes without triggering liability accounting. In addition, the guidance allows for a policy election to account for forfeitures as they occur rather than on an estimated basis. The guidance is effective for annual reporting periods beginning after December 15, 2016 with early adoption permitted. The Company elected to early adopt this ASU in the quarter ended April 3, 2016. The adoption of this new standard did not have a material impact on the Company's consolidated financial statements.

In May 2015, the FASB issued ASU 2015-07, Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent), which removes the requirement to categorize within the fair value hierarchy all investments for which fair value is measured using the net asset value per share practical expedient. Such investments should be disclosed separate from the fair value hierarchy. This ASU became effective retrospectively for the Company beginning in the quarter ended April 3, 2016. The adoption of this new standard did not have an impact on the Company's consolidated financial statements but impacted certain disclosures reflected in the notes to the accompanying condensed consolidated financial statements.

In April 2015, the FASB issued ASU No. 2015-03, Simplifying the Presentation of Debt Issuance Costs, and in August 2015, the FASB issued ASU No. 2015-15, Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements. These ASUs more closely align the treatment of debt issuance costs with debt discounts and premiums and requires debt issuance costs to be presented as a direct deduction from the carrying amount of the related debt. The amendments in these ASUs became effective for the Company in the quarter ended April 3, 2016. The adoption of these new standards impacted the presentation of the current and prior period debt issuance costs included in Note 12.

In February 2015, the FASB issued ASU 2015-02, Amendments to the Consolidation Analysis, which simplifies the consolidation evaluation process by placing more emphasis on risk of loss when determining a controlling financial interest. This new standard is effective for interim and annual periods beginning after December 15, 2015. The adoption of this new standard did not have a material impact on the Company's consolidated financial statements.

Accounting Standards Updates Issued But Not Yet Adopted

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which requires recognition of lease assets and lease liabilities for those leases classified as operating leases under previous generally accepted accounting principles in the United States ("U.S. GAAP"). The new standard is effective for annual reporting periods beginning after December 15, 2018 with early adoption permitted. The Company currently is evaluating the potential changes from this ASU to its future financial reporting and disclosures.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), which will replace numerous requirements in U.S. GAAP, including industry-specific requirements, and provide companies with a single revenue recognition model for recognizing revenue from contracts with customers. The core principle of the new standard is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. Under the new standard, the Company expects to continue using the cost-to-cost percentage-of-completion method to recognize revenue for most of its long-term contracts. The two permitted transition methods under the new standard are the full retrospective method, in which case the standard would be applied to each prior reporting period presented, or the modified retrospective method, in which case the cumulative effect of applying the standard would be recognized at the date of initial application. The Company has not yet selected a transition method. The Company currently is evaluating the potential changes from this ASU to its future financial reporting and disclosures. In July 2015, the FASB approved the deferral of the new standard's effective date by one year. The new standard will now be effective for annual reporting periods beginning after December 15, 2017. The FASB will permit companies to adopt the new standard early, but not before the original effective date of annual reporting periods beginning after December 15, 2016.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230), Classification of Certain Cash Receipts and Cash Payments. The guidance clarifies how entities should classify certain cash receipts and cash payments on the statement of cash flows. It addresses eight specific cash flows where there currently exists diversity in the way these cash flows are reported. They are (1) Debt Prepayment or Debt Extinguishment Costs; (2) Settlement of Zero-Coupon Debt Instruments; (3) Contingent Consideration Payments Made after a Business Combination; (4) Proceeds from the Settlement of Insurance Claims; (5) Proceeds from the Settlement of Corporate-Owned Life Insurance (COLI) Policies including Bank-Owned Life Insurance Policies; (6) Distributions Received from Equity Method Investees; (7) Beneficial Interests in Securitization Transactions; and (8) Separately Identifiable Cash Flows and Application of the Predominance Principle. In the absence of specific guidance, an entity should classify each separately identifiable cash source and use on the basis of the nature of the underlying cash flows. The guidance also clarifies how the predominance principle should be applied when cash receipts and cash payments have aspects of more than one class of cash flows.

As an example, for item (1) the cash flows will be classified as financing activities; for item (3) contingent payments made soon after the acquisition will be classified as investing activities and financing activities if made thereafter and for item (5) cash payments made to settle COLI policies will be classified as investing activities and premium payments may be classified as cash outflows for investing, operating or a combination of both.

The standard is effective for financial statements issued for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, provided that all of the amendments are adopted in the same period. The guidance requires retrospective application but if it is impracticable to do so for an issue, the amendments related to that issue would be applied prospectively.The Company is still evaluating the provisions of ASU 2016-15 and its impact on the condensed consolidated statement of cash flows.

Other new pronouncements issued but not effective for the Company until after October 2, 2016 are not expected to have a material impact on the Company's continuing financial position, results of operations or liquidity.

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Restatement

9 Months Ended

Oct. 02, 2016

Accounting Changes and Error Corrections [Abstract]

Restatement

Restatement

In February 2017, the Company filed the Form 10-K/A to restate its consolidated financial statements for the nine-month transition period ended December 31, 2015 ("2015 transition period"), fiscal year ended March 31, 2015 ("fiscal 2015"), fiscal year ended March 31, 2014 ("fiscal 2014"), the quarters in the 2015 transition period and fiscal 2015 (the "Restatement") to correct errors primarily related to (i) the estimation of contract costs at completion on the long-term contract (the “Lake City Contract”) with the U.S. Army to manufacture and supply small caliber ammunition at the Lake City Army Ammunition Plant ("LCAAP") causing a forward loss provision to not be identified timely and recorded in prior periods; and (ii) correcting the Company’s accounting policy for measurement of forward loss provisions. In this Form 10-Q, the Company restated its unaudited condensed consolidated financial statement of comprehensive income for the quarter ended October 4, 2015 for the consequential impact of these errors.

The Audit Committee of the Board of Directors, in consultation with senior management, determined that the Company should conduct an internal investigation, under its supervision, of the circumstances surrounding the misstatements in the accounting for the Lake City Contract and related matters. The investigation was undertaken by outside counsel, along with independent counsel for the Audit Committee. Counsel received assistance from outside forensic accountants. As disclosed in the Form 10-K/A, the investigation was previously completed.

Based on the internal investigation, the Audit Committee and senior management concluded as follows: Certain personnel at the Small Caliber Systems Division and, in some cases, Defense Systems Group, acted inappropriately and failed to adhere to the high standards established in the Company’s policies and expected by senior management and the Board of Directors. Specifically, with respect to the Lake City Contract: (a) there likely was a bias toward maintaining a targeted profit rate; (b) in some cases, there appears to have been inappropriate use of management reserves to maintain the targeted profit rate; (c) some members of the Small Caliber Systems Division finance staff failed to follow up and inquire further into indicators that cost overruns were occurring, and if such inquiries had been made, it could have led to further contemporaneous discussion and an earlier conclusion that the Lake City Contract was in a forward loss position; and (d) negative information was suppressed, and concerns at the Small Caliber Systems Division about cost overruns were not escalated appropriately to higher-level Company management or finance staff, nor were they communicated to the Audit Committee, the Board of Directors or the independent registered public accounting firms.

The Lake City Contract is within the Small Caliber Systems Division, a business unit within the Company’s Defense Systems Group, and is a fixed price contract accounted for under the percentage-of-completion revenue recognition method. The Lake City Contract was entered into in September 2012. It has an initial term of seven years plus the possibility of an award term extension of an additional three years if by July 17, 2017 the Company does not provide written notice of rejection to the U.S. Army. It is probable that the Company will provide written notice of rejection to the U.S. Army. As a result, the Restatement presents the total estimated forward loss provision for the initial seven-year term.

Management identified that the underlying contract costs estimated at completion for the Lake City Contract in prior periods contained misstatements which, when corrected, resulted in the Lake City Contract’s estimated costs at completion exceeding the contracted revenues. This necessitated a forward loss charge for the seven-year term of the Lake City Contract to be recorded for the entire anticipated forward loss on the contract in the period in which the loss became evident. The Company determined that $31,500 of the loss was evident at contract signing (second quarter of fiscal 2013) and $342,000 became evident at the time of initial production (second quarter of fiscal 2014) and restated those periods and the consequential impact in subsequent periods.

Due to the contract loss identified at the Lake City facility, the Company recognized an impairment charge for the long lived assets capitalized for the Lake City Ammunition Plant asset group in fiscal 2014. Subsequent to the impairments, costs incurred for the purchase or construction of additional long-lived assets related to this contract were expensed in the periods incurred, as such costs will not be recovered, and the depreciation expense recorded in subsequent periods was revised. The impairment charge recognized on long lived assets was $8,962, $3,576 and $2,295 in the quarters ended March 31, 2015, July 5, 2015 and October 4, 2015, respectively.

The Company corrected its accounting policy from measurement of a forward loss provision based on gross profit to measurement based on gross profit along with general and administrative costs and adjusted the previously recorded forward loss provisions. The Company's prior accounting policy for measurement of a forward loss excluded general and administrative costs from the forward loss determination resulting in an incorrect measurement of a forward loss as these costs should be included in the measurement. The aggregate impact of this correction to the contract loss reserve liability, excluding the adjustment for the Lake City Contract, was an increase of $3,061 at October 4, 2015. As part of the correction in accounting policy, the Company also reclassified certain forward loss provisions recorded in net receivables to the contract loss reserve liability.

In addition to the matters in (i) and (ii) described above, the Company also corrected for (iii) certain immaterial misstatements identified during an account review and analysis exercise.

A summary of the impact of these matters on income before income taxes and noncontrolling interest is presented below:

	Increase / (Decrease) Restatement Impact
	Quarter ended  October 4, 2015
Lake City Contract Loss and Related Adjustments:
Sales	$	(8,121	)
Cost of sales	$	(8,809	)
Gross profit	$	688
Income before interest expense, income taxes and noncontrolling interest	$	688
Income before income taxes and noncontrolling interest	$	688
Contract Loss Reserve Adjustment:
Sales	$	—
Cost of sales	$	(646	)
Gross profit	$	646
Income before interest expense, income taxes and noncontrolling interest	$	646
Income before income taxes and noncontrolling interest	$	646
Account Review and Analysis and Other:
Sales	$	(2,250	)
Cost of sales	$	742
Gross profit	$	(2,992	)
Income before interest expense, income taxes and noncontrolling interest	$	(2,992	)
Income before income taxes and noncontrolling interest	$	(2,992	)

The restatement adjustments were tax effected and any tax adjustments reflected in the condensed consolidated financial statements relate entirely to the tax effect on the restatement adjustments.

The account balances labeled “As Reported” in the following table represents the amounts previously reported in the Company's Quarterly Report on Form 10-Q for the quarter ended October 4, 2015 filed on November 5, 2015 with the SEC. The columns labeled First Restatement Adjustments and Second Restatement Adjustments represent the restatement adjustments disclosed in the Transition Report on Form 10-K for the 2015 transition period previously filed with the SEC on March 15, 2016 and the restatement adjustments disclosed in the Form 10-K/A filed with the SEC in February 2017, respectively. The effects of these prior period errors on the unaudited condensed consolidated statement of comprehensive income for the quarter ended October 4, 2015 were as follows:

	Quarter Ended October 4, 2015
Consolidated Statements of Comprehensive Income (Unaudited)	As Reported			First Restatement Adjustments			Second Restatement Adjustments			As Restated
Sales	$	1,134,886		$	18,731		$	(10,371	)	$	1,143,246
Cost of sales	884,734			58,408			(8,713		)	934,429
Gross profit	250,152			(39,677		)	(1,658		)	208,817
Operating expenses:
Research and development	28,666			—			—			28,666
Selling	28,137			—			—			28,137
General and administrative	69,384			(4,180		)	—			65,204
Gain on settlement	—			50,000			—			50,000
Income before interest, income taxes and noncontrolling interest	123,965			14,503			(1,658		)	136,810
Interest expense, net	(24,293		)	(343		)	—			(24,636		)
Income before income taxes and noncontrolling interest	99,672			14,160			(1,658		)	112,174
Income taxes	33,123			5,487			(630		)	37,980
Net income before noncontrolling interest	66,549			8,673			(1,028		)	74,194
Less net income attributable to noncontrolling interest	147			—			—			147
Net income attributable to Orbital ATK, Inc.	$	66,402		$	8,673		$	(1,028	)	$	74,047
Basic earnings per common share from:
Net income attributable to Orbital ATK, Inc.	$	1.13								$	1.26
Weighted-average number of common shares outstanding	58,746									58,746
Diluted earnings per common share from:
Net income attributable to Orbital ATK, Inc.	$	1.12								$	1.25
Weighted-average number of diluted common shares outstanding	59,304									59,304
Comprehensive income attributable to Orbital ATK, Inc.	$	81,853		$	8,673		$	(1,028	)	$	89,498

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Fair Value of Financial Instruments

9 Months Ended

Oct. 02, 2016

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

air Value of Financial Instruments

The current authoritative guidance on fair value clarifies the definition of fair value, prescribes a framework for measuring fair value, establishes a fair value hierarchy based on the inputs used to measure fair value, and expands disclosures about the use of fair value measurements. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date.

The valuation techniques required by the current authoritative literature are based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect internal market assumptions. These two types of inputs create the following fair value hierarchy:

Level 1—Quoted prices for identical instruments in active markets.

Level 2—Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable.

Level 3—Significant inputs to the valuation model are unobservable.

The following section describes the valuation methodologies used by the Company to measure its financial instruments at fair value.

Derivative financial instruments and hedging activities—In order to manage its exposure to commodity pricing, foreign currency risk and interest rate risk on debt, the Company periodically utilizes commodity, foreign currency and interest rate derivatives, which are considered Level 2 instruments. As discussed further in Note 8, the Company has outstanding commodity forward contracts that were entered into to hedge forecasted purchases of copper and zinc, as well as outstanding foreign currency forward contracts that were entered into to hedge forecasted transactions denominated in a foreign currency. Commodity derivatives are valued based on prices of futures exchanges and recently reported transactions in the marketplace. The Company currently holds four interest rate swaps with a total notional value of $300,000. These swaps are valued based on future LIBOR rates and the established fixed rate is based primarily on quotes from banks. Foreign currency derivatives are valued based on observable market transactions of spot currency rates and forward currency prices.

The carrying amounts of the Company’s financial instruments, other than derivatives, which include net receivables, inventory, accounts payable, accrued liabilities and other current assets and liabilities, are reasonable estimates of their related fair values. The fair value of the variable-rate long-term debt is calculated based on current market rates for debt of the same risk and maturities. The fair value of the fixed-rate debt is based on market quotes for each issuance. The Company considers these to be Level 2 instruments.

The Company’s non-financial instruments measured at fair value on a non-recurring basis include goodwill, indefinite-lived intangible assets and long-lived tangible assets. The valuation methods used to determine fair value require a significant degree of management judgment to determine the key assumptions. As such, the Company generally classifies non-financial instruments as either Level 2 or Level 3 fair value measurements.

The following tables set forth, by level within the fair value hierarchy, the Company's financial assets and liabilities that are measured at fair value on a recurring basis:

	October 2, 2016
	Fair Value Measurements Using Inputs Considered as
	Level 1		Level 2		Level 3
Assets
Derivatives	$	—	$	3,188	$	—
Liabilities
Derivatives	$	—	$	2,700	$	—

	December 31, 2015
	Fair Value Measurements Using Inputs Considered as
	Level 1		Level 2		Level 3
Assets
Derivatives	$	—	$	3,979	$	—
Liabilities
Derivatives	$	—	$	8,353	$	—

Recorded carrying amount and fair value of debt was as follows:

	October 2, 2016				December 31, 2015
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Fixed-rate debt	$	700,000	$	732,750	$	700,000	$	712,500
Variable-rate debt	$	895,000	$	889,531	$	790,000	$	787,697

Investments in marketable securities—The Company has investments in marketable securities held in a common collective trust ("CCT") that are primarily fixed income securities used to pay benefits under a nonqualified supplemental executive retirement plan for certain executives and highly compensated employees. Investments in a collective investment vehicle are valued by multiplying the investee company's net asset value per share with the number of units or shares owned at the valuation date as determined by the investee company. Net asset value per share is determined by the investee company's custodian or fund administrator by deducting from the value of the assets of the investee company all of its liabilities and dividing the resulting number by the outstanding number of shares or units. Investments held by the CCT, including collateral invested for securities on loan, are valued on the basis of valuations furnished by a pricing service approved by the CCT's investment manager, which determines valuations using methods based on market transactions for comparable securities and various relationships between securities which are generally recognized by institutional traders, or at fair value as determined in good faith by the CCT's investment manager. The fair value of these securities, not subject to leveling, is included within other noncurrent assets on the Company's consolidated balance sheet. The fair value of these securities is measured on a recurring basis and was $12,383 and $12,065 as of October 2, 2016 and December 31, 2015, respectively.

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Mergers, Acquisitions and Divestitures

9 Months Ended

Oct. 02, 2016

Business Combinations [Abstract]

Mergers, Acquisitions and Divestitures

Mergers, Acquisitions and Divestitures

On February 9, 2015, the Company completed the spin-off and Distribution of its former Sporting Group to its stockholders and merged with Orbital pursuant to a transaction agreement, dated April 28, 2014 (the "Transaction Agreement"). The Company completed the Merger with Orbital in order to create a global aerospace and defense company with greater technical and industrial capabilities and increased financial resources. Both the Distribution and Merger were structured to be tax-free to U.S. stockholders for U.S. federal income tax purposes. Under the Transaction Agreement, a subsidiary of the Company merged with and into Orbital, with Orbital continuing as a wholly-owned subsidiary of the Company.

Pursuant to the Distribution, Company stockholders received two shares of Vista Outdoor for each share of Company common stock held. The Company distributed a total of approximately 63.9 million shares of Vista Outdoor common stock to its stockholders of record as of the close of business on February 2, 2015 the record date for the Distribution. As a result of the Distribution, Sporting Group is no longer reported within the Company’s results from continuing operations but is reported as a discontinued operation for all prior periods presented in accordance with ASC Topic 205, "Presentation of Financial Statements." Sales reported as discontinued operations were $186,000 for the nine months ended October 4, 2015.

In connection with the Merger, each outstanding share of Orbital common stock was converted into the right to receive 0.449 shares of Company common stock. The Company issued approximately 27.4 million shares of common stock to Orbital stockholders. Immediately following the Merger, Orbital stockholders owned 46.2% of the common stock of the Company and existing stockholders owned 53.8%. Based on the closing price of the Company's common stock following the Distribution on February 9, 2015 as reported on the New York Stock Exchange, the aggregate value of the consideration paid or payable to former holders of Orbital common stock was approximately $1,800,000. The Company used the acquisition method to account for the Merger; accordingly, the results of Orbital have been included in the Company's consolidated financial statements since the date of the Merger.

Valuation of Net Assets Acquired

The following amounts represent the final determination (as of the Merger date) of the fair value of identifiable assets acquired and liabilities assumed in the Merger, including adjustments made to date during the one year measurement period from the date of the Merger:

Purchase Price:
Value of common shares issued to Orbital shareholders (1)	$	1,749,323
Value of replacement equity-based awards to holders of Orbital equity-based awards (2)	8,654
Total purchase price	$	1,757,977
Value of assets acquired and liabilities assumed:
Cash	$	253,734
Net receivables	558,639
Net inventories	75,294
Intangibles	173,000
Property, plant and equipment	277,438
Deferred tax assets, net	64,821
Other assets	36,878
Goodwill	826,548
Accounts payable	(52,028		)
Contract fair value liabilities	(130,888		)
Other liabilities	(325,459		)
Total purchase price	$	1,757,977

_________________________________________

⁽¹⁾  Equals 27.4 million Orbital ATK shares issued to Orbital shareholders multiplied by $63.94, the closing share price of the Company's common stock on the closing date of the Merger.

⁽²⁾  The fair value of replacement equity-based awards attributable to pre-Merger service was recorded as part of the consideration transferred in the Merger.

The consideration paid for Orbital's assets and liabilities was determined using the fair market value of the Company stock issued on the closing date of the Merger along with restricted stock awards granted to certain employees of Orbital.

Goodwill recognized from the Merger primarily relates to the expanded market opportunities, expected synergies and benefits of increased scale and scope of combined human, physical and financial resources attributable to merging the operations of the two companies. As stated above, the Merger was a tax-free transaction and as such, goodwill is not amortized for tax purposes.

In determining the fair values of identifiable assets acquired and liabilities assumed, a review was conducted for any significant contingent assets or liabilities existing as of the Merger date. There were no significant contingencies identified related to any legal or government action.

The accompanying condensed consolidated statements of comprehensive income (loss) for the nine months ended October 2, 2016 included a measurement period adjustment of $6,000 pertaining to the fair value of intangibles. All elements in the determination of the fair value of identifiable assets acquired and liabilities assumed in the Merger were completed during the quarter ended April 3, 2016.

Supplemental Pro Forma Data

The following unaudited supplemental pro forma data for the nine months ended October 4, 2015 presents condensed consolidated information as if the Merger had been completed on April 1, 2013. The pro forma results were calculated by combining the results from continuing operations of the Company with the stand-alone results of Orbital for the pre-Merger period, which were adjusted to eliminate historical sales between the companies and to account for certain costs which would have been incurred during this pre-Merger period:

	Nine Months Ended October 4, 2015
Sales	$	3,335,115
Income from continuing operations	$	103,418
Basic per common share from continuing operations	$	1.74
Diluted per common share from continuing operations	$	1.73

The unaudited supplemental pro forma data above includes the following significant adjustments made to account for certain costs which would have been incurred if the Merger had been completed on April 1, 2013, as adjusted for the applicable income tax impact:

	Nine Months Ended October 4, 2015
Amortization of acquired Orbital intangible assets (1)	$	3,877
Interest expense adjustment (2)	$	(6,069	)
Transaction fees for advisory, legal and accounting services (3)	$	(19,134	)

_________________________________________

⁽¹⁾ Added the amortization of acquired Orbital intangible assets recognized at fair value in purchase accounting and eliminated historical Orbital intangible asset amortization expense.

⁽²⁾ Reduced interest expense for the net reduction in debt of the Company and Orbital.

⁽³⁾ Excluded transaction fees for advisory, legal and accounting services incurred in the nine months ended October 4, 2015.

The unaudited supplemental pro forma data above does not reflect the potential realization of cost savings related to the integration of the two companies. Further, the pro forma data should not be considered indicative of the results that would have occurred if the Merger had been completed on April 1, 2013, nor are they indicative of future results.

Ongoing Business with Vista Outdoor

In conjunction with the Distribution, the Company entered into two supply agreements and a Transition Services Agreement ("TSA") with Vista Outdoor. The supply agreements call for Vista Outdoor to purchase certain minimum quantities of ammunition and gun powder from the Company through March 2017 or 2018, as applicable. The supply agreements, which are priced at arms-length, expire in 2017 (powder) and 2018 (ammunition) and may be extended in one-to-three year increments. Under the terms of the TSA, the Company provided Vista Outdoor with administrative services for 12 months following the Distribution and provided tax-related services through August 31, 2016. At the option of Vista Outdoor, the Company is currently providing tax-audit related services to Vista Outdoor. Under the terms of the TSA, Vista Outdoor has this option through August 31, 2017. Fees for services under the TSA are charged to Vista Outdoor.

Sales to Vista Outdoor under the supply agreements were $58,677 and $167,788 for the quarter and nine months ended October 2, 2016, respectively; and $43,589 (as restated) and $119,956 for the quarter and for the period from the date of Distribution to October 4, 2015, respectively. Prior to the Merger, sales to Sporting Group previously reported as intercompany sales and eliminated in consolidation $13,595 for the nine months ended October 4, 2015.

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Goodwill and Net Intangibles

9 Months Ended

Oct. 02, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Net Intangibles

Goodwill and Net Intangibles

The changes in the carrying amount of goodwill by segment were as follows:

	Flight Systems Group		Defense Systems Group		Space Systems Group			Total
Balance, December 31, 2015	$	922,991	$	363,247	$	542,128		$	1,828,366
Measurement period adjustments	5,467		—		(1,822		)	3,645
Balance, October 2, 2016	$	928,458	$	363,247	$	540,306		$	1,832,011

Goodwill recorded within Defense Systems Group is presented net of accumulated impairment losses totaling $3,700 at October 2, 2016. Goodwill recorded within Space Systems Group is presented net of accumulated impairment losses totaling $142,800 at October 2, 2016.

Net Intangibles consisted of the following:

	October 2, 2016							December 31, 2015
Amortizing intangibles:	Gross Carrying Amount		Accumulated Amortization			Net Intangibles		Gross Carrying Amount		Accumulated Amortization			Net Intangibles
Contract Backlog	$	173,000	$	(68,324	)	$	104,676	$	179,000	$	(36,696	)	$	142,304
Patented technology	11,018		(7,070		)	3,948		11,018		(6,206		)	4,812
Customer relationships and other	1,905		(1,905		)	—		24,294		(24,254		)	40
Net Intangibles	$	185,923	$	(77,299	)	$	108,624	$	214,312	$	(67,156	)	$	147,156

The contract backlog asset in the table above is being amortized as the underlying costs are recognized under the contracts. The other assets in the table above are being amortized using a straight-line method. Amortization expense related to net intangible assets was $10,821 and $32,535 for the quarter and nine months ended October 2, 2016, respectively, and $13,218 and $33,183 for the quarter and nine months ended October 4, 2015, respectively. The Company expects amortization expense related to these assets to be as follows:

	Contract Backlog		Patents		Total
Remainder of 2016	$	10,543	$	311	$	10,854
2017	35,882		1,180		37,062
2018	25,609		1,120		26,729
2019	21,760		1,072		22,832
2020	10,882		265		11,147
Thereafter	—		—		—
Total	$	104,676	$	3,948	$	108,624

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Earnings Per Share Data

9 Months Ended

Oct. 02, 2016

Earnings Per Share [Abstract]

Earnings Per Share Data

Earnings Per Share Data

Basic earnings per share ("EPS") is computed based upon the weighted-average number of common shares outstanding for each period. Diluted EPS is computed based on the weighted-average number of common shares outstanding and increased to include the dilutive effect of outstanding stock-based equity awards for each period.

In computing basic and diluted EPS for both the quarter and nine months ended October 2, 2016 and October 4, 2015, the reported earnings for each respective period were divided by the weighted-average shares outstanding, determined as follows (in thousands):

	Quarter Ended		Nine Months Ended
	October 2, 2016	October 4, 2015	October 2, 2016	October 4, 2015
Basic weighted-average number of shares outstanding	57,927	58,746	58,213	54,807
Dilutive common share equivalents - share-based equity awards	330	558	429	421
Diluted weighted-average number of shares outstanding	58,257	59,304	58,642	55,228
Anti-dilutive stock options excluded from the calculation of diluted shares	147	89	147	102

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Derivative Financial Instruments

9 Months Ended

Oct. 02, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

erivative Financial Instruments

The Company is exposed to market risks arising from adverse changes in commodity prices affecting the cost of raw materials and energy, interest rates and foreign exchange risks. In the normal course of business, these risks are managed through a variety of strategies, including the use of derivative instruments. Commodity forward contracts are periodically used to hedge forecasted purchases of certain commodities, foreign currency exchange contracts are used to hedge forecasted transactions denominated in a foreign currency, and the Company periodically uses interest rate swaps to hedge forecasted interest payments and the risk associated with variable interest rates on long-term debt.

The Company entered into forward contracts for copper and zinc in 2016. The contracts establish a fixed price for the underlying commodity and are designated and qualify as effective cash flow hedges of purchases of the commodity. Ineffectiveness is calculated as the amount by which the change in the fair value of the derivatives exceeds the change in the fair value of the anticipated commodity purchases.

The Company entered into interest rate swaps in fiscal 2014 in order to manage interest costs and the risk associated with variable rates, whereby the Company pays a fixed rate on a total notional amount of $300,000 and receives one-month LIBOR. The fair value of interest rate swap agreements approximates the amount at which they could be settled, based on future LIBOR, and the established fixed rate is based primarily on quotes from banks. The Company performs assessments of the effectiveness of hedge instruments on a quarterly basis and determined the hedges to be highly effective. The counterparties to the interest rate swap agreements expose the Company to credit risk in the event of nonperformance. At October 2, 2016, the outstanding swap agreements were in a net liability position which would require the Company to make the net settlement payments to the counterparties if the agreements were settled as of that date. The Company does not anticipate nonperformance by the Company's counterparties. The Company does not hold or issue derivative financial instruments for trading purposes.

The Company entered into foreign currency forward contracts in 2016 to hedge forecasted cash payments to a customer. This transaction was designated and qualified as an effective cash flow hedge. Ineffectiveness with respect to forecasted inventory purchases or customer cash receipts is calculated based on changes in the forward rate until the anticipated purchase or cash receipt occurs; ineffectiveness of the hedge of the accounts payable is evaluated based on the change in fair value of its anticipated settlement.

The fair values of the commodity and foreign currency forward contracts are recorded in other assets or liabilities, as appropriate, and the effective portion is reflected in accumulated other comprehensive income (loss) in the financial statements. The gains or losses on the commodity forward contracts are recorded in inventory as the commodities are purchased and in cost of sales when the related inventory is sold. The gains or losses on the foreign currency forward contracts are recorded in earnings when the related inventory is sold or customer cash receipts are received.

Outstanding commodity forward contracts that hedge forecasted commodity purchases were as follows:

	Number of Pounds
Copper	11,375
Zinc	3,830

Interest rate swap agreements in order to manage interest costs and risk associated with variable interest rates were as follows:

	Notional		Fair Value			Pay Fixed		Receive Floating		Maturity Date
Non-amortizing swap	$	100,000	$	(574	)	1.29	%	0.52	%	August 2017
Non-amortizing swap	$	100,000	$	(1,781	)	1.69	%	0.52	%	August 2018
Non-amortizing swap	$	50,000	$	(9	)	0.65	%	0.52	%	November 2016
Non-amortizing swap	$	50,000	$	(254	)	1.10	%	0.52	%	November 2017

The amount to be paid or received under these swaps is recorded as an adjustment to interest expense.

Outstanding foreign currency forward contracts were as follows:

	Quantity Hedged
Euros sold	49,820
Euros purchased	3,207

Fair values in the condensed consolidated balance sheets related to derivative instruments designated as hedging instruments were as follows:

		Asset Derivatives Fair Value				Liability Derivatives Fair Value
	Location	October 2, 2016		December 31, 2015		October 2, 2016		December 31, 2015
Commodity forward contracts	Other current assets / other current liabilities	$	1,557	$	—	$	—	$	4,445
Commodity forward contracts	Other noncurrent assets / other noncurrent liabilities	486		—		—		—
Foreign currency forward contracts	Other current assets / other current liabilities	1,126		2,875		81		1,442
Foreign currency forward contracts	Other noncurrent assets / other noncurrent liabilities	19		1,095		—		18
Interest rate contracts	Other current assets / other current liabilities	—		9		583		—
Interest rate contracts	Other noncurrent assets / other noncurrent liabilities	—		—		2,036		2,448
Total		$	3,188	$	3,979	$	2,700	$	8,353

Due to the customer contract requirements, the benefits associated with the commodity contracts may be passed on to the customer and not realized by the Company.

Gains and losses reclassified from AOCI in the condensed consolidated statements of comprehensive income related to derivative instruments were as follows:

	Gain (Loss) Reclassified from AOCI
	Location	Amount
Quarter ended October 2, 2016
Commodity forward contracts	Cost of sales	$	137
Interest rate contracts	Interest expense	$	(673	)
Foreign currency forward contracts	Cost of sales	$	(110	)
Quarter ended October 4, 2015
Commodity forward contracts	Cost of sales	$	(919	)
Interest rate contracts	Interest expense	$	(1,011	)
Foreign currency forward contracts	Cost of sales	$	(834	)
Nine months ended October 2, 2016
Commodity forward contracts	Cost of sales	$	(3,595	)
Interest rate contracts	Interest expense	$	(2,179	)
Foreign currency forward contracts	Cost of sales	$	(74	)
Nine months ended October 4, 2015
Commodity forward contracts	Cost of sales	$	(3,727	)
Interest rate contracts	Interest expense	$	(3,041	)
Foreign currency forward contracts	Cost of sales	$	(10,527	)

The ineffective portion of derivative instruments was not material and no derivatives were excluded from effectiveness testing during the quarter and nine months ended October 2, 2016 and October 4, 2015; accordingly, the Company did not recognize any related gains or losses in the income statement.

All derivatives used by the Company during the periods presented were designated as hedging instruments for accounting purposes.

The Company expects the remaining unrealized losses will be realized and reported in cost of sales or interest expense depending on the type of contract consistent with realized gains and losses noted in the table above. Estimated and actual gains or losses will change as market prices change.

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Accumulated Other Comprehensive Loss

9 Months Ended

Oct. 02, 2016

Equity [Abstract]

Accumulated Other Comprehensive Loss

Accumulated Other Comprehensive Loss ("AOCI")

The following table summarizes the components of AOCI, net of income taxes:

	October 2, 2016			December 31, 2015
Derivatives	$	256		$	(3,059	)
Pension and other postretirement benefits	(713,986		)	(784,294		)
Available-for-sale securities	2,521			1,445
Total AOCI	$	(711,209	)	$	(785,908	)

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Net Receivables

9 Months Ended

Oct. 02, 2016

Receivables [Abstract]

Net Receivables

Net Receivables

Net receivables, including amounts due under long-term contracts, consisted of the following:

	October 2, 2016			December 31, 2015
Billed receivables	$	378,641		$	217,522
Unbilled receivables	1,486,721			1,454,327
Less allowance for doubtful accounts	(536		)	(1,028		)
Net receivables	$	1,864,826		$	1,670,821

Receivable balances are shown net of customer progress payments received of $609,255 as of October 2, 2016 and $584,325 as of December 31, 2015.

Unbilled receivables represent the balance of recoverable costs and accrued profit, comprised principally of revenue recognized on contracts for which billings have not been presented to the customer because the amounts were earned but not contractually billable as of the balance sheet date. As of October 2, 2016 and December 31, 2015, the net receivable balance includes contract-related unbilled receivables which the Company does not expect to collect within the next 12 months of $293,200 and $311,600, respectively.

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Net Inventories

9 Months Ended

Oct. 02, 2016

Inventory Disclosure [Abstract]

Net Inventories

Net Inventories

Net inventories consisted of the following:

	October 2, 2016		December 31, 2015
Raw materials	$	80,767	$	88,365
Contracts in process	148,987		124,315
Finished goods	333		532
Net inventories	$	230,087	$	213,212

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Long-term Debt

9 Months Ended

Oct. 02, 2016

Debt Disclosure [Abstract]

Long-term Debt

Long-term Debt

Long-term debt consisted of the following:

	October 2, 2016		December 31, 2015
Senior Credit Facility:
Term Loan A due 2020	$	760,000	$	790,000
Revolving Credit Facility due 2020	135,000		—
5.25% Senior Notes due 2021	300,000		300,000
5.50% Senior Notes due 2023	400,000		400,000
Principal amount of long-term debt	1,595,000		1,490,000
Unamortized debt issuance costs:
Senior Credit Facility	5,318		6,302
5.25% Senior Notes due 2021	1,668		1,915
5.50% Senior Notes due 2023	5,372		5,947
Unamortized debt issuance costs	12,358		14,164
Long-term debt less unamortized debt issuance costs	1,582,642		1,475,836
Less: Current portion of long-term debt	40,000		40,000
Long-term debt	$	1,542,642	$	1,435,836

Senior Credit Facility

In September 2015, the Company refinanced its former senior credit facility with a new senior credit facility (the "Senior Credit Facility"), which is comprised of a term loan of $800,000 (the "Term Loan A") and a revolving credit facility of $1,000,000 (the "Revolving Credit Facility"), which mature in September 2020. The Term Loan A is subject to quarterly principal payments of $10,000, with the remaining balance due at maturity. Substantially all tangible and intangible assets of the Company and certain domestic subsidiaries, excluding real property, are pledged as collateral under the Senior Credit Facility. Borrowings under the Senior Credit Facility bear interest at a per annum rate equal to either the sum of a base rate plus a margin or the sum of a LIBOR rate plus a margin. Each margin is based on the Company's total leverage ratio. In compliance with the terms of the Senior Credit Facility, the current base rate margin is 0.5% and the current LIBOR margin is 1.5%. The weighted-average interest rate for the Term Loan A, after taking into account the interest rate swaps discussed below, was 2.33% at October 2, 2016. The Company pays a quarterly commitment fee on the unused portion of the Revolving Credit Facility based on its total leverage ratio. Based on the Company's current total leverage ratio, this fee is currently 0.25%. As of October 2, 2016, the Company had borrowings of $135,000 under the Revolving Credit Facility and had outstanding letters of credit of $128,121, which reduced amounts available on the Revolving Credit Facility to $736,879. There are unamortized debt issuance costs of $6,667 associated with the former senior credit facility in addition to debt issuance costs incurred related to the new Senior Credit Facility that are being amortized to interest expense over five years, the term of the Senior Credit Facility.

5.50% Senior Notes

In September 2015, the Company issued $400,000 aggregate principal amount of 5.50% Senior Notes (the "5.50% Notes") that mature on October 1, 2023. These notes are general unsecured obligations. Interest on these notes is payable on April 1 and October 1 of each year. The Company has the right to redeem some or all of these notes from time to time on or after October 1, 2018, at specified redemption prices. Prior to October 1, 2018, the Company may redeem some or all of these notes at a price equal to 100% of their principal amount plus accrued and unpaid interest to the date of redemption and a specified make-whole premium. In addition, prior to October 1, 2018, the Company may redeem up to 35% of the aggregate principal amount of these notes with the net cash proceeds of certain equity offerings, at a price equal to 105.5% of their principal amount plus accrued and unpaid interest to the date of redemption. Debt issuance costs of $6,136 related to these notes are being amortized to interest expense over eight years, the term of the notes.

5.25% Senior Notes

In fiscal 2014, the Company issued $300,000 aggregate principal amount of 5.25% Senior Notes (the "5.25% Notes") that mature on October 1, 2021. These notes are general unsecured obligations. Interest on these notes is payable on April 1 and October 1 of each year. The Company has the right to redeem some or all of these notes from time to time on or after October 1, 2016, at specified redemption prices. Debt issuance costs of $2,625 related to these notes are being amortized to interest expense over eight years, the term of the notes.

Interest Rate Swaps

As of October 2, 2016, the Company had interest rate swap agreements in order to manage interest costs and the risk associated with variable interest rates - see Note 8.

Rank and Guarantees

The 5.50% Notes and the 5.25% Notes are the Company's general unsecured and unsubordinated obligations and rank equally in right of payment with all of the Company’s existing and future unsecured and unsubordinated indebtedness, rank senior in right of payment to all of the Company's existing and future subordinated indebtedness and are effectively subordinated to all existing and future senior secured indebtedness, including the Senior Credit Facility, to the extent of the collateral. The 5.50% Notes and the 5.25% Notes are guaranteed on an unsecured basis, jointly and severally and fully and unconditionally, by substantially all of the Company's domestic subsidiaries. The Senior Credit Facility obligations are guaranteed on a secured basis, jointly and severally and fully and unconditionally, by substantially all of the Company's domestic subsidiaries. All of these guarantor subsidiaries are 100% owned by the Company. The Company, exclusive of these guarantor subsidiaries, has no independent operations or material assets. The guarantee by any Subsidiary Guarantor of the Company's obligations in respect of the 5.50% Notes and the 5.25% Notes will be released in each of the following circumstances:

• if, as a result of the sale of its capital stock, such Subsidiary Guarantor ceases to be a Restricted Subsidiary;

• if such Subsidiary Guarantor is designated as an "Unrestricted Subsidiary" with respect to the 5.25% Notes and the 5.50% Notes;

• upon defeasance or satisfaction and discharge of the 5.25% Notes and the 5.50% Notes, as applicable; and

• if such Subsidiary Guarantor has been released from its guarantees of indebtedness under the credit agreement governing the Senior Credit Facility (the "Credit Agreement") and all capital markets debt securities.

Scheduled Minimum Loan Payments

The scheduled minimum loan payments on outstanding long-term debt are as follows:

Remainder of 2016	$	10,000
Calendar 2017	40,000
Calendar 2018	40,000
Calendar 2019	40,000
Calendar 2020	765,000
Thereafter	700,000
Total	$	1,595,000

Covenants and Default Provisions

The Company's Senior Credit Facility and the indentures governing the 5.50% Notes and the 5.25% Notes impose restrictions on the Company, including limitations on its ability to incur additional debt, enter into capital leases, grant liens, pay dividends and make certain other payments, sell assets, or merge or consolidate with or into another entity. In addition, the Senior Credit Facility limits the Company's ability to enter into sale-and-leaseback transactions. The 5.50% Notes and 5.25% Notes limit the aggregate sum of dividends, share repurchases and other designated restricted payments to an amount based on the Company's net income, stock issuance proceeds and certain other items since April 1, 2001, less restricted payments made since that date. The Senior Credit Facility allows the Company to make unlimited "restricted payments" (as defined in the Credit Agreement), which, among other items, would allow payments for future stock repurchases, as long as the Company maintains a certain amount of liquidity and maintains certain senior secured debt limits, with a limit, when those senior secured debt limits are not met, of $250,000 plus proceeds of any equity issuances plus 50% of net income since October 7, 2010. The Senior Credit Facility also requires the Company to meet and maintain specified financial ratios, including a minimum interest coverage ratio and a maximum consolidated total leverage ratio. The Company's debt agreements contain cross-default provisions so that noncompliance with the covenants within one debt agreement could cause a default under other debt agreements as well. The Company's ability to comply with these covenants and to meet and maintain the financial ratios may be affected by events beyond its control. Borrowings under the Senior Credit Facility are subject to compliance with these covenants. As of October 2, 2016, the Company was in compliance with the financial covenants.

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Employee Benefit Plans

9 Months Ended

Oct. 02, 2016

Compensation and Retirement Disclosure [Abstract]

Employee Benefit Plans

Employee Benefit Plans

The components of net periodic benefit cost for pension benefits were as follows:

	Pension Benefits
	Quarter Ended						Nine Months Ended
	October 2, 2016			October 4, 2015			October 2, 2016			October 4, 2015
Service cost	$	4,556		$	4,815		$	13,645		$	14,445
Interest cost	25,360			30,348			76,186			90,866
Expected return on plan assets	(40,578		)	(40,117		)	(121,733		)	(119,867		)
Amortization of unrecognized net loss	31,355			37,690			94,167			112,989
Amortization of unrecognized prior service cost	(5,151		)	(5,213		)	(15,453		)	(15,638		)
Net periodic benefit cost	15,542			27,523			46,812			82,795
Special termination benefit cost / curtailment	—			—			1,673			—
Net periodic benefit cost	$	15,542		$	27,523		$	48,485		$	82,795

During the nine months ended October 2, 2016, the Company recorded a settlement expense of $1,673 to recognize the impact of lump sum benefit payments made in the nonqualified supplemental executive retirement plan.

The components of net periodic benefit income for other postretirement benefits were as follows:

	Other Postretirement Benefits
	Quarter Ended						Nine Months Ended
	October 2, 2016			October 4, 2015			October 2, 2016			October 4, 2015
Service cost	$	—		$	1		$	1		$	1
Interest cost	841			1,126			2,523			3,446
Expected return on plan assets	(780		)	(922		)	(2,405		)	(2,732		)
Amortization of unrecognized net loss	364			495			1,091			1,393
Amortization of unrecognized prior service cost	(1,291		)	(1,813		)	(3,871		)	(5,706		)
Net periodic benefit income	$	(866	)	$	(1,113	)	$	(2,661	)	$	(3,598	)

Effective January 1, 2016, the Company changed the approach used to measure service and interest costs for pension and other postretirement benefits. Prior to January 1, 2016, the Company measured service and interest costs utilizing a single weighted-average discount rate derived from the yield curve used to measure the plan obligations. Beginning January 1, 2016, the Company has elected to measure service and interest costs by applying the specific spot rates along that yield curve to the plans' liability cash flows. The Company believes the new approach provides a more precise measurement of service and interest costs by aligning the timing of the plans’ forecasted cash flows to the corresponding spot rates on the yield curve. This change does not affect the measurement of plan obligations. The Company accounted for this change on a prospective basis as a change in accounting estimate, resulting in lower pension expense compared to the method used prior to January 1, 2016.

Employer Contributions. During the nine months ended October 2, 2016, the Company contributed $39,500 to the pension trust. The Company also paid $4,776 to retirees in connection with its nonqualified supplemental executive retirement plan and $4,814 to retirees in connection with its other postretirement benefit plans.

During the remainder of 2016, the Company is not required to make any additional pension benefit contributions in order to meet the minimum required contributions for 2016. In addition, the Company anticipates making additional payments of approximately $692 to retirees under the nonqualified plan and $2,674 to retirees in connection with its other postretirement benefit plans during the remainder of 2016.

During the quarter ended October 2, 2016, the Company amended its retiree health care plan to provide coverage through a private exchange effective January 1, 2017. The exchange offers the retiree a broad choice of health care plans from which to choose. The Company will contribute fixed payments to a Health Retirement Account (HRA), when applicable, for those retirees who previously had subsidized health care coverage through the Company. The contributions to the HRA account are retirees' funds to be spent on qualified health care premiums and eligible out-of pocket expenses. The plan amendment caused a remeasurement that increased the Company's funded status as of October 2, 2016 by $36,444 and will reduce expenses recorded in future periods.

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Income Taxes

9 Months Ended

Oct. 02, 2016

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The Company's income taxes include federal, foreign and state income taxes. Income taxes for interim periods are based on estimated effective annual income tax rates.

The effective income tax rates for the quarters ended October 2, 2016 and October 4, 2015 were 18.0% and 33.9% (as restated), respectively. The decrease in the rate from the quarter ended October 4, 2015 is primarily due to increased benefits from the Research and Development tax credit, the true up of prior-year taxes and settlement of the examination by the Internal Revenue Service ("IRS") of the fiscal 2013 and 2014 tax returns in the quarter ended October 2, 2016.

The effective income tax rates for the nine months ended October 2, 2016 and October 4, 2015 were 25.9% and 39.9%, respectively. The decrease in the rate from the nine months ended October 4, 2015 is primarily due to the impact of goodwill impairment and nondeductible transaction costs in the nine months ended October 4, 2015, as well as increased benefits from the Domestic Manufacturing Deduction, increased Research and Development tax credits, the true up of prior-year taxes and settlement of the examination by the IRS of the fiscal 2013 and 2014 tax returns partially offset by an increase in state tax expense in the nine months ended October 2, 2016.

The Company or one of its subsidiaries files income tax returns in the U.S. federal, various U.S. state and foreign jurisdictions. With few exceptions, the Company is no longer subject to U.S. federal, state and local, or foreign income tax examinations by tax authorities for years prior to 2010. The IRS has completed the audits of the Company through fiscal 2014. The Company believes appropriate provisions for all outstanding issues have been made for all remaining open years in all jurisdictions.

Although the timing and outcome of audit settlements are uncertain, it is reasonably possible that a $11,176 reduction of the uncertain tax benefits will occur in the next 12 months. The settlement of these unrecognized tax benefits could result in an increase in net income from $0 to $10,074.

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Stock-based Compensation

9 Months Ended

Oct. 02, 2016

Equity [Abstract]

Stock-based Compensation

Stock-based Compensation

The Company has 5,000,000 shares of $1.00 par value preferred stock authorized, none of which has been issued.

The Company sponsors five stock-based incentive plans: the Orbital ATK, Inc. 2015 Stock Incentive Plan (the "2015 Stock Incentive Plan"); three legacy ATK plans (the Alliant Techsystems Inc. 2005 Stock Incentive Plan, the Non-Employee Director Restricted Stock Plan and the 1990 Equity Incentive Plan); and one legacy Orbital plan, under which the Company assumed the obligation to issue Company common stock pursuant to the terms of the Transaction Agreement relating to the Merger (the Orbital Sciences Corporation 2005 Amended and Restated Stock Incentive Plan). At October 2, 2016, the Company had authorized up to 3,750,000 common shares under the 2015 Stock Incentive Plan, of which 2,812,847 common shares were available to be granted. No new grants will be made out of the other four plans.

During the quarter ended October 2, 2016, the Company adopted an Employee Stock Purchase Plan ("ESPP") whereby eligible employees may purchase shares of the Company's common stock at the lesser of 85% of the fair market value of a share of common stock at the beginning or at the end of the quarterly offering period. The ESPP is compensatory and the fair value of the shares purchased is determined using the Black-Scholes option pricing model.

There are five types of awards outstanding under the Company's stock incentive plans: performance awards, total stockholder return performance awards ("TSR awards"), restricted stock units, restricted stock and stock options. The Company issues treasury shares upon (i) the payment of performance awards, TSR awards and restricted stock units, (ii) the grant of restricted stock and (iii) the exercise of stock options.

Restricted Stock Units. Pursuant to the terms of the Transaction Agreement and under the terms of the ATK 2005 Stock Incentive Plan, all of the performance awards and TSR awards outstanding as of February 9, 2015 were converted into time-vesting restricted stock units with vesting periods corresponding to the respective performance periods. During the nine months ended October 2, 2016, 42,935 shares were issued upon the vesting of restricted stock units for the performance period ending in 2016. As of October 2, 2016, there were 53,449 restricted stock units outstanding for the performance period ending in 2017.

Performance Awards. Performance shares are valued at the fair value of the Company's stock as of the grant date and expense is recognized based on the number of shares expected to vest under the terms of the award under which they are granted.

As of October 2, 2016, there were 81,689 shares reserved for executive officers and key employees for the performance period beginning April 1, 2015 and ending December 31, 2017. Of these shares, up to 50% will become payable only upon achievement of a financial performance goal relating to absolute earnings per share growth; and up to 50% will become payable only upon achievement of a performance goal relating to absolute sales growth.

As of October 2, 2016, there were 73,802 shares reserved for executive officers and key employees for the performance period beginning January 1, 2016 and ending December 31, 2018. Of these shares, up to 50% will become payable only upon achievement of a financial performance goal relating to return on investment of capital; and up to 50% will become payable only upon achievement of a performance goal relating to absolute sales growth.

TSR Awards. As of October 2, 2016, there were 73,802 shares and 81,689 shares reserved for TSR awards for key employees for the fiscal year 2016-2018 and 2015-2017 performance periods, respectively. The Company used an integrated Monte Carlo simulation model to determine the fair value of the TSR awards. The Monte Carlo model calculates the probability of satisfying the market conditions stipulated in the award. This probability is an input into the trinomial lattice model used to determine the fair value of the awards as well as the assumptions of other variables, including the risk-free interest rate and expected volatility of the Company's stock price in future periods. The risk-free rate is based on the U.S. dollar-denominated U.S. Treasury strip rate with a remaining term that approximates the life assumed at the date of grant. There were 73,802 TSR awards granted with a fair value of $87.85 per share and 3,208 TSR awards granted with a fair value of $94.93 per share during the nine months ended October 2, 2016.

Restricted Stock Awards. Restricted stock granted to non-employee directors and certain key employees totaled 160,242 shares during the nine months ended October 2, 2016. Restricted shares vest over periods generally ranging from one to three years from the date of award and are valued at the fair value of the Company's common stock as of the grant date.

Stock Options. Stock options are granted periodically, with an exercise price equal to the fair market value of the Company's common stock on the date of grant, and generally vest from one to three years from the date of grant. Options are generally granted with seven-year or ten-year terms. The weighted-average fair value of each option grant is estimated on the date of grant using the Black-Scholes option pricing model and represents the difference between fair market value on the date of grant and the estimated market value on the expected exercise date. The option pricing model requires the Company to make assumptions. The risk-free rate is based on U.S. Treasury zero-coupon issues with a remaining term that approximates the expected life assumed at the date of grant. Expected volatility is based on the historical volatility of the Company's stock over the past seven years. The expected option life is based on the contractual term of the stock option and expected employee exercise and post-vesting employment termination trends. There were 72,328 stock options granted during the nine months ended October 2, 2016 with a weighted-average fair value of $20.53 per stock option. There were 74,543 stock options granted during the nine months ended October 4, 2015 with a weighted-average fair value of $39.44 per stock option.

Stock-based compensation expense totaled $6,317 and $17,515 in the quarter and nine months ended October 2, 2016; and $6,046 and $28,369 in the quarter and nine months ended October 4, 2015. The income tax benefit recognized for stock-based compensation was $2,182 and $6,445 during the quarter and nine months ended October 2, 2016; and $2,194 and $9,815 during the quarter and nine months ended October 4, 2015.

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Contingencies

9 Months Ended

Oct. 02, 2016

Commitments and Contingencies Disclosure [Abstract]

Contingencies

Contingencies

Litigation.   From time to time, the Company is subject to various legal proceedings, including lawsuits, which arise out of, and are incidental to, the conduct of the Company's business. The Company does not consider any of such proceedings that are currently pending, individually or in the aggregate, notwithstanding that the unfavorable resolution of any matter may have a material effect on net earnings in any particular quarter, to be material to its business or likely to result in a material adverse effect on its operating results, financial condition or cash flows.

Securities Class Action.   On August 12, 2016, a putative class action complaint, naming the Company, our Chief Executive Officer and our Chief Financial Officer as defendants, was filed in the United States District Court for the Eastern District of Virginia (Steven Knurr v. Orbital ATK, Inc., et al., No. 16-cv-01031 (TSE-MSN)). The class action complaint asserts claims on behalf of purchasers of Orbital ATK securities for violations of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 and Rule 10b-5 thereunder, arising out of allegedly false and misleading statements and the failure to disclose that: (i) the Company lacked effective control over financial reporting; and (ii) as a result, the Company failed to record an anticipated loss on its long-term contract with the U.S. Army to manufacture and supply small caliber ammunition at the U.S. Army’s Lake City Army Ammunition Plant. The complaint seeks a determination that this matter is a proper class action and certifying the plaintiff as the class representative, an award of damages, an award of reasonable costs and expenses of trial, including counsel and expert fees, and an award of such other relief as deemed appropriate by the Court. The Company intends to defend this action vigorously.

SEC Investigation.   The SEC is conducting a non-public investigation relating to our historical accounting practices as a result of the prior restatement of the Company’s unaudited condensed consolidated financial statements for the quarterly periods ended July 5, 2015 and October 4, 2015 as described in the Company's Amendment to the Transition Report on Form 10-K for the nine-month transition period ending December 31, 2015 filed on March 15, 2016. The Company has also voluntarily self-reported to the SEC regarding matters pertaining to the Restatement described in the Company's Amendment to the Form 10-K for the nine-month transition period ending December 31, 2015 filed on February 24, 2017. The Company is cooperating fully with the SEC in connection with these matters.

U.S. Government Investigations.   The Company is also subject to U.S. Government investigations from which civil, criminal or administrative proceedings could result. Such proceedings could involve claims by the U.S. Government for fines, penalties, compensatory and treble damages, restitution and/or forfeitures. Under government regulations, a company, or one or more of its operating divisions or subdivisions, can also be suspended or debarred from government contracts, or lose its export privileges, based on the results of investigations. The Company believes, based upon all available information, that the outcome of any such pending government investigations will not have a material adverse effect on its operating results, financial condition or cash flows.

Claim Recovery.   Profits expected to be realized on contracts are based on management's estimates of total contract sales value and costs at completion. Estimated amounts for contract changes and claims are included in contract sales only when realization is estimated to be probable. Unbilled receivables included $13,175 and $25,042 as of October 2, 2016 and December 31, 2015, respectively, for contract claims.

Environmental Liabilities.   The Company's operations and ownership or use of real property are subject to a number of federal, state, and local environmental laws and regulations, including those for discharge of hazardous materials, remediation of contaminated sites and restoration of damage to the environment. At certain sites that the Company owns or operates or formerly owned or operated, there is known or potential contamination that the Company is required to investigate or remediate. The Company could incur substantial costs, including remediation costs, resource restoration costs, fines, and penalties, or third party property damage or personal injury claims, as a result of liabilities associated with past practices or violations of environmental laws or noncompliance with environmental permits.

The Company has been identified as a potentially responsible party (“PRP”), along with other parties, in several regulatory agency actions associated with hazardous waste sites. As a PRP, the Company may be required to pay a share of the costs of the investigation and clean-up of these sites. While uncertainties exist with respect to the amounts and timing of the ultimate environmental liabilities, based on currently available information, the Company has concluded that these matters, individually or in the aggregate, will not have a material adverse effect on operating results, financial condition, or cash flows.

The Company could incur substantial costs, including cleanup costs, resource restoration, fines and penalties or third party property damage or personal injury claims, as a result of violations or liabilities under environmental laws or noncompliance with environmental permits. While environmental laws and regulations have not had a material adverse effect on the Company's operating results, financial condition, or cash flows in the past and the Company has environmental management programs in place to mitigate these risks, it is difficult to predict whether they will have a material impact in the future.

The liability for environmental remediation represents management's best estimate of the present value of the probable and reasonably estimable costs related to known remediation obligations. The receivable represents the present value of the amount that the Company expects to recover, as discussed below. Both the liability and receivable have been discounted to reflect the present value of the expected future cash flows, using a discount rate of 0.2% and 0.7% as of October 2, 2016 and December 31, 2015, respectively. The Company's discount rate is calculated using the 20-year Treasury constant maturities rate, net of an estimated inflationary factor of 1.9%, rounded to the nearest quarter percent.

The following is a summary of the amounts recorded for environmental remediation:

	October 2, 2016						December 31, 2015
	Liability			Receivable			Liability			Receivable
Amounts (payable) receivable	$	(43,939	)	$	19,762		$	(41,824	)	$	18,236
Unamortized discount	524			(179		)	1,718			(568		)
Present value amounts (payable) receivable	$	(43,415	)	$	19,583		$	(40,106	)	$	17,668

Amounts expected to be paid or received in periods more than one year from the balance sheet date are classified as noncurrent. Of the $43,415 discounted liability as of October 2, 2016, $5,706 was recorded in other current liabilities. Of the $19,583 discounted receivable, the Company recorded $3,318 in other current assets. As of October 2, 2016, the estimated discounted range of reasonably possible costs of environmental remediation was $43,415 to $68,340.

The Company expects that a portion of its environmental compliance and remediation costs will be recoverable under U.S. Government contracts. Some of the remediation costs that are not recoverable from the U.S. Government that are associated with facilities purchased in a business acquisition are covered by various indemnification agreements, as described in Note 14 to the audited consolidated financial statements included in the Company’s Form 10-K/A.

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Share Repurchases

9 Months Ended

Oct. 02, 2016

Equity [Abstract]

Share Repurchases

Share Repurchases

On March 11, 2015, the Company's Board of Directors authorized the Company to repurchase up to the lesser of $75,000 or 1.0 million shares of its common stock through December 31, 2015. On August 4, 2015, the Board of Directors increased the amount authorized for repurchase to the lesser of $100,000 or 1.4 million shares of the Company's common stock. On October 29, 2015, the Board of Directors further increased the amount authorized for repurchase to the lesser of $250,000 or 3.25 million shares through December 31, 2016. On November 1, 2016, the Board of Directors further increased the amount authorized for repurchase to the lesser of $300,000 or 4.0 million shares and extended the repurchase period through March 31, 2017. On February 27, 2017, the Board of Directors further increased the amount authorized for repurchase to $450,000 and extended the repurchase period through March 31, 2018.

Shares of the Company's common stock may be purchased in the open market, subject to compliance with applicable laws and regulations and the Company’s debt covenants, depending upon market conditions and other factors. The Company purchased 576,407 shares for $43,750 and 1,104,511 shares for $87,991 during the quarter and nine months ended October 2, 2016, respectively. The Company purchased 497,145 shares for $36,275 and 825,986 shares for $60,777 during the quarter and nine months ended October 4, 2015.

In accordance with the Transaction Agreement entered into on April 28, 2014, we did not repurchase any outstanding shares prior to the closing of the Distribution and Merger during the quarter ended March 31, 2015.

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Changes in Estimates

9 Months Ended

Oct. 02, 2016

Changes in Estimates [Abstract]

Changes in Estimates

Changes in Estimates

The majority of our sales are accounted for as long-term contracts, which are accounted for using the percentage-of-completion method. Accounting for contracts under the percentage-of-completion method requires judgment relative to assessing risks and estimating contract revenues and costs. Profits expected to be realized on contracts are based on management’s estimates of total contract sales value and costs at completion. Estimated amounts for contract changes, including scope and claims, are included in contract sales only when realization is probable. Assumptions used for recording sales and earnings are modified in the period of change to reflect revisions in contract value and estimated costs. In the period in which it is determined that a loss will be incurred on a contract, the entire amount of the estimated loss, based on gross profit along with general and administrative costs, is charged to cost of sales. Changes in estimates of contract value, costs or profits are recognized using the cumulative catch-up method of accounting. The cumulative effect of a change in estimate is recognized in the period a change in estimate occurs.

Changes in contract estimates occur for a variety of reasons including changes in contract scope, unforeseen changes in contract cost estimates due to unanticipated cost growth or risks affecting contract costs and/or the resolution of contract risks at lower costs than anticipated, as well as changes in contract overhead costs over the performance period. Changes in estimates could have a material effect on the Company's consolidated financial position or annual results of operations.

Aggregate net changes in contract estimates recognized using the cumulative catch-up method of accounting increased operating income by approximately $6,000 and $27,000 for the quarters ended October 2, 2016 and October 4, 2015, respectively. The changes in estimates for the quarter ended October 2, 2016 were primarily attributable to changes in scope on the Company's contracts in all segments, primarily in Flight Systems Group. The changes in estimates for the quarter ended October 4, 2015 were attributable to profit margin improvements in all segments, primarily in Flight Systems Group and Space Systems Group.

Aggregate net changes in contract estimates recognized using the cumulative catch-up method of accounting increased operating income by approximately $92,000 and $81,000 for the nine months ended October 2, 2016 and October 4, 2015, respectively. The changes in estimates for the nine months ended October 2, 2016 were attributable to profit margin improvements in all segments, primarily in Defense Systems Group and Flight Systems Group. The changes in estimates for the nine months ended October 4, 2015 were attributable to profit margin improvements in all segments, primarily Defense Systems Group and Flight Systems Group. Estimated costs to complete on loss contracts at October 2, 2016 and December 31, 2015 were $1,248,549 and $1,392,218, respectively.

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Restructuring Costs

9 Months Ended

Oct. 02, 2016

Restructuring and Related Activities [Abstract]

Restructuring Costs

Restructuring Costs

The Company had restructuring liabilities for termination benefits of $400 and $3,589 and facility-related liabilities of $19,570 and $26,154, at October 2, 2016 and December 31, 2015, respectively. The decrease in restructuring liabilities for the nine months ended October 2, 2016, was primarily attributed to cash expenditures for termination benefits and facilities.

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Operating Segment Information

9 Months Ended

Oct. 02, 2016

Segment Reporting [Abstract]

Operating Segment Information

Operating Segment Information

The Company operates its business structure within three operating segments. These operating segments ("groups") are defined based on the reporting and review process used by the Company's chief executive officer and other management.  The operating structure aligns the Company's capabilities and resources with its customers and markets and positions the Company for long-term growth and improved profitability.

• Flight Systems Group develops rockets that are used as small- and medium-class space launch vehicles to place satellites into Earth orbit and escape trajectories, interceptor and target vehicles for missile defense systems and suborbital launch vehicles that place payloads into a variety of high-altitude trajectories. The group also develops and produces medium- and large-class rocket propulsion systems for human and cargo launch vehicles, strategic missiles, missile defense interceptors and target vehicles. Additionally, the group operates in the military and commercial aircraft and launch structures markets. Other products include illuminating flares and aircraft countermeasures.

• Defense Systems Group develops and produces small-, medium-, and large-caliber ammunition, precision weapons and munitions, high performance gun systems, and propellant and energetic materials. It operates the Lake City Army Ammunition Plant in Independence, Missouri ("LCAAP") and a Naval Sea Systems Command ("NAVSEA") facility in Rocket Center, West Virginia. Defense Systems Group is also a leader in tactical solid rocket motor development and production for a variety of air-, sea- and land-based missile systems. The group serves a variety of domestic and international customers in the defense and security markets in a prime contractor, partner or supplier role. Defense Systems Group also provides propulsion control systems that support Missile Defense Agency and NASA programs, airborne missile warning systems, advanced fuzes and defense electronics. The group produces the U.S. Navy's Advanced Anti-Radiation Guided Missile ("AARGM") and has developed advanced air-breathing propulsion systems and special-mission aircraft for defense applications.

• Space Systems Group develops and produces small- and medium-class satellites that are used to enable global and regional communications and broadcasting, conduct space-related scientific research and perform other activities related to national security. In addition, Space Systems Group develops and produces human-rated space systems for Earth-orbit and deep-space exploration, including delivering cargo to the International Space Station. This Group is also a provider of spacecraft components and subsystems and specialized engineering and operations services to U.S. Government agencies.

The following summarizes the Company's results by segment:

	Quarters Ended						Nine Months Ended
	October 2, 2016			October 4, 2015			October 2, 2016			October 4, 2015
				(As Restated)
Sales to external customers:
Flight Systems Group	$	360,531		$	356,131		$	1,081,513		$	1,040,076
Defense Systems Group	451,286			440,749			1,326,076			1,355,703
Space Systems Group	231,885			346,366			775,853			822,195
Total external sales	1,043,702			1,143,246			3,183,442			3,217,974
Intercompany sales:
Flight Systems Group	2,463			7,173			9,542			42,041
Defense Systems Group	4,668			1,488			14,396			18,892
Space Systems Group	16,661			5,021			37,497			14,532
Corporate	(23,792		)	(13,682		)	(61,435		)	(75,465		)
Total intercompany sales	—			—			—			—
Total sales	$	1,043,702		$	1,143,246		$	3,183,442		$	3,217,974
Income from continuing operations, before interest, income taxes and noncontrolling interest:
Flight Systems Group	$	43,886		$	94,015		$	151,454		$	186,247
Defense Systems Group	33,066			34,299			126,437			130,778
Space Systems Group	19,347			20,986			95,766			30,293
Corporate	(5,323		)	(12,490		)	(14,657		)	(105,356		)
Total income from continuing operations, before interest, income taxes and noncontrolling interest	$	90,976		$	136,810		$	359,000		$	241,962

	October 2, 2016		December 31, 2015
Total assets:
Flight Systems Group	$	2,307,885	$	2,223,787
Defense Systems Group	1,287,290		1,184,071
Space Systems Group	1,242,167		1,272,425
Corporate	528,750		643,412
Total assets	$	5,366,092	$	5,323,695

Certain administrative functions are primarily managed by the Company at the corporate headquarters ("Corporate"). Some examples of such functions are human resources, pension and postretirement benefits, corporate accounting, legal, tax and treasury. Significant assets and liabilities managed at Corporate include those associated with debt, restructuring, pension and postretirement benefits, environmental liabilities, litigation liabilities, strategic growth costs and income taxes.

Costs related to the administrative functions managed by Corporate are either recorded at Corporate or allocated to the segments based on the nature of the expense. The difference between pension and postretirement benefit expense calculated under U.S. GAAP and the expense calculated under U.S. Cost Accounting Standards is recorded at the corporate level which provides for greater clarity on the operating results of the business segments. Administrative expenses such as corporate accounting, legal and treasury costs are allocated out to the business segments. Environmental expenses are allocated to each segment based on the origin of the underlying environmental cost. Transactions between segments are recorded at the segment level, consistent with the Company's financial accounting policies. Intercompany balances and transactions involving different segments are eliminated at the Company's consolidated financial statements level and are shown above in Corporate. The amortization expense related to purchase accounting attributed to the acquisition of Orbital is also recorded in Corporate.

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Subsequent Events

9 Months Ended

Oct. 02, 2016

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

As a result of the Restatement, the Company was unable to timely file its Quarterly Reports on Form 10-Q with the SEC for the fiscal quarters ended July 3, 2016 and October 2, 2016 ("the 2016 Quarterly Reports"), as well as its Annual Report on Form 10-K for 2016. The Company has entered into an extension agreement with its Senior Credit Facility lender group to extend, until April 14, 2017, the deadline under its credit agreement for filing with the SEC the 2016 Quarterly Reports, as well as an Amended Form 10-Q for the fiscal quarter ended April 3, 2016 and the Company's Annual Report on Form 10-K for 2016. As a result of the extension, the Company is in compliance with the financial covenants as of the date of the filing of this Form 10-Q based on the Company's restated financial results.

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Basis of Presentation and Responsibility for Interim Financial Statements (Policies)

9 Months Ended

Oct. 02, 2016

Accounting Policies [Abstract]

Basis of Presentation

The unaudited condensed consolidated financial statements of Orbital ATK, Inc. ("the Company" or "Orbital ATK") as set forth in this quarterly report have been prepared in accordance with the requirements of the U.S. Securities and Exchange Commission ("SEC") for interim reporting. As permitted under those rules, certain footnotes and other financial information that are normally required by accounting principles generally accepted in the United States can be condensed or omitted.

Fair Value of Financial Instruments

The current authoritative guidance on fair value clarifies the definition of fair value, prescribes a framework for measuring fair value, establishes a fair value hierarchy based on the inputs used to measure fair value, and expands disclosures about the use of fair value measurements. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date.

The valuation techniques required by the current authoritative literature are based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect internal market assumptions. These two types of inputs create the following fair value hierarchy:

Level 1—Quoted prices for identical instruments in active markets.

Level 2—Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable.

Level 3—Significant inputs to the valuation model are unobservable.

The following section describes the valuation methodologies used by the Company to measure its financial instruments at fair value.

Derivative financial instruments and hedging activities—In order to manage its exposure to commodity pricing, foreign currency risk and interest rate risk on debt, the Company periodically utilizes commodity, foreign currency and interest rate derivatives, which are considered Level 2 instruments. As discussed further in Note 8, the Company has outstanding commodity forward contracts that were entered into to hedge forecasted purchases of copper and zinc, as well as outstanding foreign currency forward contracts that were entered into to hedge forecasted transactions denominated in a foreign currency. Commodity derivatives are valued based on prices of futures exchanges and recently reported transactions in the marketplace. The Company currently holds four interest rate swaps with a total notional value of $300,000. These swaps are valued based on future LIBOR rates and the established fixed rate is based primarily on quotes from banks. Foreign currency derivatives are valued based on observable market transactions of spot currency rates and forward currency prices.

The carrying amounts of the Company’s financial instruments, other than derivatives, which include net receivables, inventory, accounts payable, accrued liabilities and other current assets and liabilities, are reasonable estimates of their related fair values. The fair value of the variable-rate long-term debt is calculated based on current market rates for debt of the same risk and maturities. The fair value of the fixed-rate debt is based on market quotes for each issuance. The Company considers these to be Level 2 instruments.

The Company’s non-financial instruments measured at fair value on a non-recurring basis include goodwill, indefinite-lived intangible assets and long-lived tangible assets. The valuation methods used to determine fair value require a significant degree of management judgment to determine the key assumptions. As such, the Company generally classifies non-financial instruments as either Level 2 or Level 3 fair value measurements.

The following tables set forth, by level within the fair value hierarchy, the Company's financial assets and liabilities that are measured at fair value on a recurring basis:

	October 2, 2016
	Fair Value Measurements Using Inputs Considered as
	Level 1		Level 2		Level 3
Assets
Derivatives	$	—	$	3,188	$	—
Liabilities
Derivatives	$	—	$	2,700	$	—

	December 31, 2015
	Fair Value Measurements Using Inputs Considered as
	Level 1		Level 2		Level 3
Assets
Derivatives	$	—	$	3,979	$	—
Liabilities
Derivatives	$	—	$	8,353	$	—

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Restatement (Tables)

9 Months Ended

Oct. 02, 2016

Accounting Changes and Error Corrections [Abstract]

Schedule of Error Corrections and Prior Period Adjustments

A summary of the impact of these matters on income before income taxes and noncontrolling interest is presented below:

	Increase / (Decrease) Restatement Impact
	Quarter ended  October 4, 2015
Lake City Contract Loss and Related Adjustments:
Sales	$	(8,121	)
Cost of sales	$	(8,809	)
Gross profit	$	688
Income before interest expense, income taxes and noncontrolling interest	$	688
Income before income taxes and noncontrolling interest	$	688
Contract Loss Reserve Adjustment:
Sales	$	—
Cost of sales	$	(646	)
Gross profit	$	646
Income before interest expense, income taxes and noncontrolling interest	$	646
Income before income taxes and noncontrolling interest	$	646
Account Review and Analysis and Other:
Sales	$	(2,250	)
Cost of sales	$	742
Gross profit	$	(2,992	)
Income before interest expense, income taxes and noncontrolling interest	$	(2,992	)
Income before income taxes and noncontrolling interest	$	(2,992	)

The restatement adjustments were tax effected and any tax adjustments reflected in the condensed consolidated financial statements relate entirely to the tax effect on the restatement adjustments.

The account balances labeled “As Reported” in the following table represents the amounts previously reported in the Company's Quarterly Report on Form 10-Q for the quarter ended October 4, 2015 filed on November 5, 2015 with the SEC. The columns labeled First Restatement Adjustments and Second Restatement Adjustments represent the restatement adjustments disclosed in the Transition Report on Form 10-K for the 2015 transition period previously filed with the SEC on March 15, 2016 and the restatement adjustments disclosed in the Form 10-K/A filed with the SEC in February 2017, respectively. The effects of these prior period errors on the unaudited condensed consolidated statement of comprehensive income for the quarter ended October 4, 2015 were as follows:

	Quarter Ended October 4, 2015
Consolidated Statements of Comprehensive Income (Unaudited)	As Reported			First Restatement Adjustments			Second Restatement Adjustments			As Restated
Sales	$	1,134,886		$	18,731		$	(10,371	)	$	1,143,246
Cost of sales	884,734			58,408			(8,713		)	934,429
Gross profit	250,152			(39,677		)	(1,658		)	208,817
Operating expenses:
Research and development	28,666			—			—			28,666
Selling	28,137			—			—			28,137
General and administrative	69,384			(4,180		)	—			65,204
Gain on settlement	—			50,000			—			50,000
Income before interest, income taxes and noncontrolling interest	123,965			14,503			(1,658		)	136,810
Interest expense, net	(24,293		)	(343		)	—			(24,636		)
Income before income taxes and noncontrolling interest	99,672			14,160			(1,658		)	112,174
Income taxes	33,123			5,487			(630		)	37,980
Net income before noncontrolling interest	66,549			8,673			(1,028		)	74,194
Less net income attributable to noncontrolling interest	147			—			—			147
Net income attributable to Orbital ATK, Inc.	$	66,402		$	8,673		$	(1,028	)	$	74,047
Basic earnings per common share from:
Net income attributable to Orbital ATK, Inc.	$	1.13								$	1.26
Weighted-average number of common shares outstanding	58,746									58,746
Diluted earnings per common share from:
Net income attributable to Orbital ATK, Inc.	$	1.12								$	1.25
Weighted-average number of diluted common shares outstanding	59,304									59,304
Comprehensive income attributable to Orbital ATK, Inc.	$	81,853		$	8,673		$	(1,028	)	$	89,498

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Fair Value of Financial Instruments (Tables)

9 Months Ended

Oct. 02, 2016

Fair Value Disclosures [Abstract]

Schedule of carrying values and estimated fair values of assets and liabilities that are not measured on a recurring basis

:

	October 2, 2016				December 31, 2015
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Fixed-rate debt	$	700,000	$	732,750	$	700,000	$	712,500
Variable-rate debt	$	895,000	$	889,531	$	790,000	$	787,697

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Mergers, Acquisitions and Divestitures (Tables)

9 Months Ended

Oct. 02, 2016

Business Combinations [Abstract]

Summary of preliminary fair value of assets acquired and liabilities assumed

The following amounts represent the final determination (as of the Merger date) of the fair value of identifiable assets acquired and liabilities assumed in the Merger, including adjustments made to date during the one year measurement period from the date of the Merger:

Purchase Price:
Value of common shares issued to Orbital shareholders (1)	$	1,749,323
Value of replacement equity-based awards to holders of Orbital equity-based awards (2)	8,654
Total purchase price	$	1,757,977
Value of assets acquired and liabilities assumed:
Cash	$	253,734
Net receivables	558,639
Net inventories	75,294
Intangibles	173,000
Property, plant and equipment	277,438
Deferred tax assets, net	64,821
Other assets	36,878
Goodwill	826,548
Accounts payable	(52,028		)
Contract fair value liabilities	(130,888		)
Other liabilities	(325,459		)
Total purchase price	$	1,757,977

_________________________________________

⁽¹⁾  Equals 27.4 million Orbital ATK shares issued to Orbital shareholders multiplied by $63.94, the closing share price of the Company's common stock on the closing date of the Merger.

⁽²⁾  The fair value of replacement equity-based awards attributable to pre-Merger service was recorded as part of the consideration transferred in the Merger.

Business Acquisition, Pro Forma Information

The following unaudited supplemental pro forma data for the nine months ended October 4, 2015 presents condensed consolidated information as if the Merger had been completed on April 1, 2013. The pro forma results were calculated by combining the results from continuing operations of the Company with the stand-alone results of Orbital for the pre-Merger period, which were adjusted to eliminate historical sales between the companies and to account for certain costs which would have been incurred during this pre-Merger period:

	Nine Months Ended October 4, 2015
Sales	$	3,335,115
Income from continuing operations	$	103,418
Basic per common share from continuing operations	$	1.74
Diluted per common share from continuing operations	$	1.73

Business Acquisition, Pro Forma Information, Nonrecurring Adjustments

The unaudited supplemental pro forma data above includes the following significant adjustments made to account for certain costs which would have been incurred if the Merger had been completed on April 1, 2013, as adjusted for the applicable income tax impact:

	Nine Months Ended October 4, 2015
Amortization of acquired Orbital intangible assets (1)	$	3,877
Interest expense adjustment (2)	$	(6,069	)
Transaction fees for advisory, legal and accounting services (3)	$	(19,134	)

_________________________________________

⁽¹⁾ Added the amortization of acquired Orbital intangible assets recognized at fair value in purchase accounting and eliminated historical Orbital intangible asset amortization expense.

⁽²⁾ Reduced interest expense for the net reduction in debt of the Company and Orbital.

⁽³⁾ Excluded transaction fees for advisory, legal and accounting services incurred in the nine months ended October 4, 2015.

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Goodwill and Net Intangibles (Tables)

9 Months Ended

Oct. 02, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of carrying amount of goodwill by operating segment

The changes in the carrying amount of goodwill by segment were as follows:

	Flight Systems Group		Defense Systems Group		Space Systems Group			Total
Balance, December 31, 2015	$	922,991	$	363,247	$	542,128		$	1,828,366
Measurement period adjustments	5,467		—		(1,822		)	3,645
Balance, October 2, 2016	$	928,458	$	363,247	$	540,306		$	1,832,011

Schedule of Finite-Lived Intangible Assets

Net Intangibles consisted of the following:

	October 2, 2016							December 31, 2015
Amortizing intangibles:	Gross Carrying Amount		Accumulated Amortization			Net Intangibles		Gross Carrying Amount		Accumulated Amortization			Net Intangibles
Contract Backlog	$	173,000	$	(68,324	)	$	104,676	$	179,000	$	(36,696	)	$	142,304
Patented technology	11,018		(7,070		)	3,948		11,018		(6,206		)	4,812
Customer relationships and other	1,905		(1,905		)	—		24,294		(24,254		)	40
Net Intangibles	$	185,923	$	(77,299	)	$	108,624	$	214,312	$	(67,156	)	$	147,156

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The Company expects amortization expense related to these assets to be as follows:

	Contract Backlog		Patents		Total
Remainder of 2016	$	10,543	$	311	$	10,854
2017	35,882		1,180		37,062
2018	25,609		1,120		26,729
2019	21,760		1,072		22,832
2020	10,882		265		11,147
Thereafter	—		—		—
Total	$	104,676	$	3,948	$	108,624

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Earnings Per Share Data (Tables)

9 Months Ended

Oct. 02, 2016

Earnings Per Share [Abstract]

Schedule of weighted average number of shares

In computing basic and diluted EPS for both the quarter and nine months ended October 2, 2016 and October 4, 2015, the reported earnings for each respective period were divided by the weighted-average shares outstanding, determined as follows (in thousands):

	Quarter Ended		Nine Months Ended
	October 2, 2016	October 4, 2015	October 2, 2016	October 4, 2015
Basic weighted-average number of shares outstanding	57,927	58,746	58,213	54,807
Dilutive common share equivalents - share-based equity awards	330	558	429	421
Diluted weighted-average number of shares outstanding	58,257	59,304	58,642	55,228
Anti-dilutive stock options excluded from the calculation of diluted shares	147	89	147	102

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Derivative Financial Instruments (Tables)

9 Months Ended

Oct. 02, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of outstanding commodity forward contracts

Outstanding commodity forward contracts that hedge forecasted commodity purchases were as follows:

	Number of Pounds
Copper	11,375
Zinc	3,830

Interest rate swap agreements in order to manage interest costs and risk associated with variable interest rates were as follows:

	Notional		Fair Value			Pay Fixed		Receive Floating		Maturity Date
Non-amortizing swap	$	100,000	$	(574	)	1.29	%	0.52	%	August 2017
Non-amortizing swap	$	100,000	$	(1,781	)	1.69	%	0.52	%	August 2018
Non-amortizing swap	$	50,000	$	(9	)	0.65	%	0.52	%	November 2016
Non-amortizing swap	$	50,000	$	(254	)	1.10	%	0.52	%	November 2017

The amount to be paid or received under these swaps is recorded as an adjustment to interest expense.

Outstanding foreign currency forward contracts were as follows:

	Quantity Hedged
Euros sold	49,820
Euros purchased	3,207

Schedule of fair value and location of derivative instruments designated as hedging instruments in the consolidated balance sheet

Fair values in the condensed consolidated balance sheets related to derivative instruments designated as hedging instruments were as follows:

		Asset Derivatives Fair Value				Liability Derivatives Fair Value
	Location	October 2, 2016		December 31, 2015		October 2, 2016		December 31, 2015
Commodity forward contracts	Other current assets / other current liabilities	$	1,557	$	—	$	—	$	4,445
Commodity forward contracts	Other noncurrent assets / other noncurrent liabilities	486		—		—		—
Foreign currency forward contracts	Other current assets / other current liabilities	1,126		2,875		81		1,442
Foreign currency forward contracts	Other noncurrent assets / other noncurrent liabilities	19		1,095		—		18
Interest rate contracts	Other current assets / other current liabilities	—		9		583		—
Interest rate contracts	Other noncurrent assets / other noncurrent liabilities	—		—		2,036		2,448
Total		$	3,188	$	3,979	$	2,700	$	8,353

Schedule of derivative gains and losses in the consolidated income statements related to commodity forward contracts and foreign currency forward contracts

Gains and losses reclassified from AOCI in the condensed consolidated statements of comprehensive income related to derivative instruments were as follows:

	Gain (Loss) Reclassified from AOCI
	Location	Amount
Quarter ended October 2, 2016
Commodity forward contracts	Cost of sales	$	137
Interest rate contracts	Interest expense	$	(673	)
Foreign currency forward contracts	Cost of sales	$	(110	)
Quarter ended October 4, 2015
Commodity forward contracts	Cost of sales	$	(919	)
Interest rate contracts	Interest expense	$	(1,011	)
Foreign currency forward contracts	Cost of sales	$	(834	)
Nine months ended October 2, 2016
Commodity forward contracts	Cost of sales	$	(3,595	)
Interest rate contracts	Interest expense	$	(2,179	)
Foreign currency forward contracts	Cost of sales	$	(74	)
Nine months ended October 4, 2015
Commodity forward contracts	Cost of sales	$	(3,727	)
Interest rate contracts	Interest expense	$	(3,041	)
Foreign currency forward contracts	Cost of sales	$	(10,527	)

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Accumulated Other Comprehensive Loss (Tables)

9 Months Ended

Oct. 02, 2016

Equity [Abstract]

Schedule of components of accumulated OCI, net of income taxes

he following table summarizes the components of AOCI, net of income taxes:

	October 2, 2016			December 31, 2015
Derivatives	$	256		$	(3,059	)
Pension and other postretirement benefits	(713,986		)	(784,294		)
Available-for-sale securities	2,521			1,445
Total AOCI	$	(711,209	)	$	(785,908	)

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Net Receivables (Tables)

9 Months Ended

Oct. 02, 2016

Receivables [Abstract]

Schedule of receivables, including amounts due under long-term contracts (contract receivables)

Net receivables, including amounts due under long-term contracts, consisted of the following:

	October 2, 2016			December 31, 2015
Billed receivables	$	378,641		$	217,522
Unbilled receivables	1,486,721			1,454,327
Less allowance for doubtful accounts	(536		)	(1,028		)
Net receivables	$	1,864,826		$	1,670,821

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Net Inventories (Tables)

9 Months Ended

Oct. 02, 2016

Inventory Disclosure [Abstract]

Schedule of net inventories

Net inventories consisted of the following:

	October 2, 2016		December 31, 2015
Raw materials	$	80,767	$	88,365
Contracts in process	148,987		124,315
Finished goods	333		532
Net inventories	$	230,087	$	213,212

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Long-term Debt (Tables)

9 Months Ended

Oct. 02, 2016

Debt Disclosure [Abstract]

Schedule of long-term debt, including the current portion

Long-term debt consisted of the following:

	October 2, 2016		December 31, 2015
Senior Credit Facility:
Term Loan A due 2020	$	760,000	$	790,000
Revolving Credit Facility due 2020	135,000		—
5.25% Senior Notes due 2021	300,000		300,000
5.50% Senior Notes due 2023	400,000		400,000
Principal amount of long-term debt	1,595,000		1,490,000
Unamortized debt issuance costs:
Senior Credit Facility	5,318		6,302
5.25% Senior Notes due 2021	1,668		1,915
5.50% Senior Notes due 2023	5,372		5,947
Unamortized debt issuance costs	12,358		14,164
Long-term debt less unamortized debt issuance costs	1,582,642		1,475,836
Less: Current portion of long-term debt	40,000		40,000
Long-term debt	$	1,542,642	$	1,435,836

Schedule of minimum payments on outstanding long-term debt

The scheduled minimum loan payments on outstanding long-term debt are as follows:

Remainder of 2016	$	10,000
Calendar 2017	40,000
Calendar 2018	40,000
Calendar 2019	40,000
Calendar 2020	765,000
Thereafter	700,000
Total	$	1,595,000

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Employee Benefit Plans (Tables)

9 Months Ended

Oct. 02, 2016

Compensation and Retirement Disclosure [Abstract]

Schedule of components of net periodic benefit cost

The components of net periodic benefit cost for pension benefits were as follows:

	Pension Benefits
	Quarter Ended						Nine Months Ended
	October 2, 2016			October 4, 2015			October 2, 2016			October 4, 2015
Service cost	$	4,556		$	4,815		$	13,645		$	14,445
Interest cost	25,360			30,348			76,186			90,866
Expected return on plan assets	(40,578		)	(40,117		)	(121,733		)	(119,867		)
Amortization of unrecognized net loss	31,355			37,690			94,167			112,989
Amortization of unrecognized prior service cost	(5,151		)	(5,213		)	(15,453		)	(15,638		)
Net periodic benefit cost	15,542			27,523			46,812			82,795
Special termination benefit cost / curtailment	—			—			1,673			—
Net periodic benefit cost	$	15,542		$	27,523		$	48,485		$	82,795

During the nine months ended October 2, 2016, the Company recorded a settlement expense of $1,673 to recognize the impact of lump sum benefit payments made in the nonqualified supplemental executive retirement plan.

The components of net periodic benefit income for other postretirement benefits were as follows:

	Other Postretirement Benefits
	Quarter Ended						Nine Months Ended
	October 2, 2016			October 4, 2015			October 2, 2016			October 4, 2015
Service cost	$	—		$	1		$	1		$	1
Interest cost	841			1,126			2,523			3,446
Expected return on plan assets	(780		)	(922		)	(2,405		)	(2,732		)
Amortization of unrecognized net loss	364			495			1,091			1,393
Amortization of unrecognized prior service cost	(1,291		)	(1,813		)	(3,871		)	(5,706		)
Net periodic benefit income	$	(866	)	$	(1,113	)	$	(2,661	)	$	(3,598	)

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Contingencies (Tables)

9 Months Ended

Oct. 02, 2016

Commitments and Contingencies Disclosure [Abstract]

Summary of the amounts recorded for environmental remediation

The following is a summary of the amounts recorded for environmental remediation:

	October 2, 2016						December 31, 2015
	Liability			Receivable			Liability			Receivable
Amounts (payable) receivable	$	(43,939	)	$	19,762		$	(41,824	)	$	18,236
Unamortized discount	524			(179		)	1,718			(568		)
Present value amounts (payable) receivable	$	(43,415	)	$	19,583		$	(40,106	)	$	17,668

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Operating Segment Information (Tables)

9 Months Ended

Oct. 02, 2016

Segment Reporting [Abstract]

Schedule of segment reporting information, by segment

The following summarizes the Company's results by segment:

	Quarters Ended						Nine Months Ended
	October 2, 2016			October 4, 2015			October 2, 2016			October 4, 2015
				(As Restated)
Sales to external customers:
Flight Systems Group	$	360,531		$	356,131		$	1,081,513		$	1,040,076
Defense Systems Group	451,286			440,749			1,326,076			1,355,703
Space Systems Group	231,885			346,366			775,853			822,195
Total external sales	1,043,702			1,143,246			3,183,442			3,217,974
Intercompany sales:
Flight Systems Group	2,463			7,173			9,542			42,041
Defense Systems Group	4,668			1,488			14,396			18,892
Space Systems Group	16,661			5,021			37,497			14,532
Corporate	(23,792		)	(13,682		)	(61,435		)	(75,465		)
Total intercompany sales	—			—			—			—
Total sales	$	1,043,702		$	1,143,246		$	3,183,442		$	3,217,974
Income from continuing operations, before interest, income taxes and noncontrolling interest:
Flight Systems Group	$	43,886		$	94,015		$	151,454		$	186,247
Defense Systems Group	33,066			34,299			126,437			130,778
Space Systems Group	19,347			20,986			95,766			30,293
Corporate	(5,323		)	(12,490		)	(14,657		)	(105,356		)
Total income from continuing operations, before interest, income taxes and noncontrolling interest	$	90,976		$	136,810		$	359,000		$	241,962

	October 2, 2016		December 31, 2015
Total assets:
Flight Systems Group	$	2,307,885	$	2,223,787
Defense Systems Group	1,287,290		1,184,071
Space Systems Group	1,242,167		1,272,425
Corporate	528,750		643,412
Total assets	$	5,366,092	$	5,323,695

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Basis of Presentation and Responsibility for Interim Financial Statements (Details)	9 Months Ended
	Oct. 02, 2016 segment
Accounting Policies [Abstract]
Number of operating segments	3

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Restatement (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Oct. 02, 2016	Oct. 04, 2015	Jul. 05, 2015	Mar. 31, 2015	Sep. 29, 2013	Sep. 30, 2012	Oct. 02, 2016	Dec. 31, 2015	Oct. 04, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales	$ 1,043,702	$ 1,143,246					$ 3,183,442		$ 3,217,974
Cost of sales	833,403	934,429					2,466,496		2,563,023
Gross profit	210,299	208,817					716,946		654,951
General and administrative	66,337	65,204					195,388		268,442
Income from continuing operations, before interest, income taxes and noncontrolling interest	90,976	136,810					359,000		241,962
Income before income taxes and noncontrolling interest	$ 73,362	112,174					$ 307,807		154,165
Lake City Contract Loss | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales		(8,121)
Cost of sales		(8,809)
Gross profit		688
Income from continuing operations, before interest, income taxes and noncontrolling interest		688
Income before income taxes and noncontrolling interest		688
Contract Loss Reserve Adjustment | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales		0
Cost of sales		(646)
Gross profit		646
Income from continuing operations, before interest, income taxes and noncontrolling interest		646
Income before income taxes and noncontrolling interest		646
Account Review And Analysis Adjustments | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales		(2,250)
Cost of sales		742
Gross profit		(2,992)
Income from continuing operations, before interest, income taxes and noncontrolling interest		(2,992)
Income before income taxes and noncontrolling interest		(2,992)
U.S. Army | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Term of contract, additional term								3 years
Loss related to contracts					$ 342,000	$ 31,500
Impairment of long-lived assets held-for-use		$ 2,295	$ 3,576	$ 8,962
Increase (decrease) in contract loss reserve Liability									$ 3,061
Term of contract, initial term								7 years

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Restatement - Income Statement (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Oct. 04, 2015	Oct. 02, 2016	Oct. 04, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales	$ 1,043,702	$ 1,143,246	$ 3,183,442	$ 3,217,974
Cost of Goods and Services Sold	833,403	934,429	2,466,496	2,563,023
Gross profit	210,299	208,817	716,946	654,951
Operating expenses:
Research and development	24,887	28,666	80,418	78,698
Selling	28,099	28,137	82,140	81,549
General and administrative	66,337	65,204	195,388	268,442
Gain on settlement	0	50,000	0	50,000
Income from continuing operations, before interest, income taxes and noncontrolling interest	90,976	136,810	359,000	241,962
Net interest expense	(17,614)	(24,636)	(51,193)	(61,171)
Income from continuing operations, before income taxes and noncontrolling interest	73,362	112,174	307,807	154,165
Income taxes	13,181	37,980	79,765	61,563
Income from continuing operations, before noncontrolling interest	60,181	74,194	228,042	92,602
Less net (loss) income attributable to noncontrolling interest	(135)	147	(311)	72
Net income attributable to Orbital ATK, Inc.	$ 60,316	$ 74,047	$ 228,353	$ 109,367
Basic earnings per common share from:
Net income attributable to Orbital ATK, Inc., basic (in dollars per share)	$ 1.04	$ 1.26	$ 3.92	$ 2.00
Weighted-average number of common shares outstanding (in shares)	57,927	58,746	58,213	54,807
Diluted earnings per common share from:
Net income attributable to Orbital ATK, Inc., diluted (in dollars per share)	$ 1.04	$ 1.25	$ 3.89	$ 1.98
Weighted-average number of diluted common shares outstanding (in shares)	58,257	59,304	58,642	55,228
Comprehensive income (loss) attributable to Orbital ATK, Inc.	$ 99,754	$ 89,498	$ 303,021	$ (147,551)
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales		1,134,886
Cost of Goods and Services Sold		884,734
Gross profit		250,152
Operating expenses:
Research and development		28,666
Selling		28,137
General and administrative		69,384
Gain on settlement		0
Income from continuing operations, before interest, income taxes and noncontrolling interest		123,965
Net interest expense		(24,293)
Income from continuing operations, before income taxes and noncontrolling interest		99,672
Income taxes		33,123
Income from continuing operations, before noncontrolling interest		66,549
Less net (loss) income attributable to noncontrolling interest		147
Net income attributable to Orbital ATK, Inc.		$ 66,402
Basic earnings per common share from:
Net income attributable to Orbital ATK, Inc., basic (in dollars per share)		$ 1.13
Weighted-average number of common shares outstanding (in shares)		58,746
Diluted earnings per common share from:
Net income attributable to Orbital ATK, Inc., diluted (in dollars per share)		$ 1.12
Weighted-average number of diluted common shares outstanding (in shares)		59,304
Comprehensive income (loss) attributable to Orbital ATK, Inc.		$ 81,853
First Restatement Adjustments | Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales		18,731
Cost of Goods and Services Sold		58,408
Gross profit		(39,677)
Operating expenses:
Research and development		0
Selling		0
General and administrative		(4,180)
Gain on settlement		50,000
Income from continuing operations, before interest, income taxes and noncontrolling interest		14,503
Net interest expense		(343)
Income from continuing operations, before income taxes and noncontrolling interest		14,160
Income taxes		5,487
Income from continuing operations, before noncontrolling interest		8,673
Less net (loss) income attributable to noncontrolling interest		0
Net income attributable to Orbital ATK, Inc.		8,673
Diluted earnings per common share from:
Comprehensive income (loss) attributable to Orbital ATK, Inc.		8,673
Second Restatement Adjustments | Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales		(10,371)
Cost of Goods and Services Sold		(8,713)
Gross profit		(1,658)
Operating expenses:
Research and development		0
Selling		0
General and administrative		0
Gain on settlement		0
Income from continuing operations, before interest, income taxes and noncontrolling interest		(1,658)
Net interest expense		0
Income from continuing operations, before income taxes and noncontrolling interest		(1,658)
Income taxes		(630)
Income from continuing operations, before noncontrolling interest		(1,028)
Less net (loss) income attributable to noncontrolling interest		0
Net income attributable to Orbital ATK, Inc.		(1,028)
Diluted earnings per common share from:
Comprehensive income (loss) attributable to Orbital ATK, Inc.		$ (1,028)

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Fair Value of Financial Instruments - Fair value of assets and liabilities measured on a recurring basis (Details)	Oct. 02, 2016 USD ($) derivative	Aug. 31, 2016 derivative	Dec. 31, 2015 USD ($)
Fair value of assets and liabilities measured on a recurring basis
Number of interest rate derivatives held | derivative	4
Fair value of assets and liabilities that are measured on a recurring basis
Fair value of assets and liabilities measured on a recurring basis
Marketable securities	$ 12,383,000		$ 12,065,000
Fair value of assets and liabilities that are measured on a recurring basis | Level 2
Fair value of assets and liabilities measured on a recurring basis
Derivative assets	3,188,000		3,979,000
Derivative liabilities	2,700,000		$ 8,353,000
Interest Rate Swap
Fair value of assets and liabilities measured on a recurring basis
Notional amount	$ 300,000,000
Notional amount to mature August 2016 | Interest Rate Swap
Fair value of assets and liabilities measured on a recurring basis
Number of interest rate derivatives matured | derivative		1

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Fair Value of Financial Instruments - Carrying values and estimated fair values of assets and liabilities not measured on a recurring basis (Details) - USD ($) $ in Thousands	Oct. 02, 2016	Dec. 31, 2015
Carrying Amount
Assets and liabilities that are not measured on a recurring basis
Fixed-rate debt	$ 700,000	$ 700,000
Variable-rate debt	895,000	790,000
Fair Value
Assets and liabilities that are not measured on a recurring basis
Fixed-rate debt	732,750	712,500
Variable-rate debt	$ 889,531	$ 787,697

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Mergers, Acquisitions and Divestitures - Narrative (Details) $ in Thousands, shares in Millions			3 Months Ended		9 Months Ended
	Feb. 09, 2015 USD ($) agreement shares	Feb. 02, 2015 shares	Oct. 02, 2016 USD ($)	Oct. 04, 2015 USD ($)	Oct. 02, 2016 USD ($)	Oct. 04, 2015 USD ($)
Business Acquisition [Line Items]
Sales from discontinued operations					$ 186,000
Provisional information, initial accounting incomplete, adjustment, consideration transferred	$ 1,800,000
Provisional information, initial accounting incomplete, adjustment, intangibles					6,000
Common Stock
Business Acquisition [Line Items]
Shares, conversion ratio	2
New isues | shares		63.9
Common Stock | Orbital Sciences
Business Acquisition [Line Items]
Shares, conversion ratio	0.449
Stock issued, acquisitions (shares) | shares	27.4
Sporting Group
Business Acquisition [Line Items]
Revenue from related parties						$ 13,595
Vista Outdoor
Business Acquisition [Line Items]
Number of supply agreements | agreement	2
Administrative services agreement, term	12 months
Revenue from related parties			$ 58,677	$ 43,589	$ 167,788	$ 119,956
Vista Outdoor | Minimum
Business Acquisition [Line Items]
Supply agreement, term	1 year
Vista Outdoor | Maximum
Business Acquisition [Line Items]
Supply agreement, term	3 years
Orbital Stockholders | Orbital Sciences
Business Acquisition [Line Items]
Percentage of voting interests acquired	46.20%
Existing Stockholders | Orbital Sciences
Business Acquisition [Line Items]
Percentage of voting interests acquired	53.80%

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Mergers, Acquisitions and Divestitures - Valuation of Net Assets Acquired (Details) $ / shares in Units, $ in Thousands, shares in Millions	Feb. 09, 2015 USD ($) $ / shares shares	Oct. 02, 2016 USD ($) entity	Dec. 31, 2015 USD ($)
Value of assets acquired and liabilities assumed:
Goodwill and net intangibles		$ 1,832,011	$ 1,828,366
Number of companies that were integrated | entity		2
Orbital Sciences
Value of assets acquired and liabilities assumed:
Cash	$ 253,734
Net receivables	558,639
Net inventories	75,294
Intangibles	173,000
Property, plant and equipment	277,438
Deferred tax assets, net	64,821
Other assets	36,878
Goodwill and net intangibles	826,548
Accounts payable	(52,028)
Contract fair value liabilities	(130,888)
Other liabilities	(325,459)
Total purchase price	$ 1,757,977
Share Price | $ / shares	$ 63.94
Orbital Sciences | Common Stock
Value of assets acquired and liabilities assumed:
Total purchase price	$ 1,749,323
Orbital Sciences | Equity-based Awards
Value of assets acquired and liabilities assumed:
Total purchase price	$ 8,654
Common Stock | Orbital Sciences
Value of assets acquired and liabilities assumed:
Shares issued | shares	27.4

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Mergers, Acquisitions and Divestitures - Supplemental Pro Forma Data (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2016 USD ($) entity	Oct. 04, 2015 USD ($)	Oct. 02, 2016 USD ($) entity	Oct. 04, 2015 USD ($) $ / shares
Business Acquisition [Line Items]
Number of companies that were integrated | entity	2		2
Sales				$ 3,335,115
Income from continuing operations				$ 103,418
Basic earnings per common share from continuing operations (in dollars per share) | $ / shares				$ 1.74
Diluted earnings per common share from continuing operations (in dollars per share) | $ / shares				$ 1.73
Amortization of intangible assets	$ 10,821	$ 13,218	$ 32,535	$ 33,183
Acquisition-related Costs
Business Acquisition [Line Items]
Amortization of intangible assets				3,877
Interest expense adjustment				(6,069)
Transaction fees for advisory, legal and accounting services				$ (19,134)

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Goodwill and Net Intangibles - Goodwill and Deferred Charges (Details) $ in Thousands	9 Months Ended
	Oct. 02, 2016 USD ($)
Changes in the carrying amount of goodwill
Balance at the beginning of the period	$ 1,828,366
Measurement period adjustments	3,645
Balance at the end of the period	1,832,011
Flight Systems Group
Changes in the carrying amount of goodwill
Balance at the beginning of the period	922,991
Measurement period adjustments	5,467
Balance at the end of the period	928,458
Defense Systems Group
Goodwill
Goodwill, Impaired, Accumulated Impairment Loss	3,700
Changes in the carrying amount of goodwill
Balance at the beginning of the period	363,247
Measurement period adjustments	0
Balance at the end of the period	363,247
Space Systems Group
Goodwill
Goodwill, Impaired, Accumulated Impairment Loss	142,800
Changes in the carrying amount of goodwill
Balance at the beginning of the period	542,128
Measurement period adjustments	(1,822)
Balance at the end of the period	$ 540,306

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Goodwill and Net Intangibles - Intangibles Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Oct. 04, 2015	Oct. 02, 2016	Oct. 04, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 10,821	$ 13,218	$ 32,535	$ 33,183

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Goodwill and Net Intangibles - Intangible Assets (Details) - USD ($) $ in Thousands	Oct. 02, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 185,923	$ 214,312
Accumulated Amortization	(77,299)	(67,156)
Net Intangibles	108,624	147,156
Contract Backlog
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	173,000	179,000
Accumulated Amortization	(68,324)	(36,696)
Net Intangibles	104,676	142,304
Patented technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,018	11,018
Accumulated Amortization	(7,070)	(6,206)
Net Intangibles	3,948	4,812
Customer relationships and other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,905	24,294
Accumulated Amortization	(1,905)	(24,254)
Net Intangibles	$ 0	$ 40

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Goodwill and Net Intangibles - Amortization (Details) - USD ($) $ in Thousands	Oct. 02, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Remainder of 2016	$ 10,854
2017	37,062
2018	26,729
2019	22,832
2020	11,147
Thereafter	0
Net Intangibles	108,624	$ 147,156
Contract Backlog
Finite-Lived Intangible Assets [Line Items]
Remainder of 2016	10,543
2017	35,882
2018	25,609
2019	21,760
2020	10,882
Thereafter	0
Net Intangibles	104,676	$ 142,304
Patents
Finite-Lived Intangible Assets [Line Items]
Remainder of 2016	311
2017	1,180
2018	1,120
2019	1,072
2020	265
Thereafter	0
Net Intangibles	$ 3,948

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Earnings Per Share Data (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Oct. 04, 2015	Oct. 02, 2016	Oct. 04, 2015
Earnings Per Share [Abstract]
Basic (in shares)	57,927	58,746	58,213	54,807
Dilutive effect of stock-based awards (in shares)	330	558	429	421
Diluted (in shares)	58,257	59,304	58,642	55,228
Anti-dilutive stock options excluded from the calculation of diluted shares (in shares)	147	89	147	102

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Derivative Financial Instruments (Details) € in Thousands, lb in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2016 USD ($)	Oct. 04, 2015 USD ($)	Oct. 02, 2016 USD ($) lb	Oct. 04, 2015 USD ($)	Oct. 02, 2016 EUR (€)	Dec. 31, 2015 USD ($)
Designated as Hedging Instrument
Derivative Asset [Abstract]
Fair value of derivative assets	$ 3,188,000		$ 3,188,000			$ 3,979,000
Derivative Liability [Abstract]
Fair value of derivative liabilities	2,700,000		2,700,000			8,353,000
Interest Rate Swap
Derivative [Line Items]
Notional amount	300,000,000		$ 300,000,000
Copper
Derivative [Line Items]
Notional amount, mass | lb			11,375
Zinc
Derivative [Line Items]
Notional amount, mass | lb			3,830
Commodity forward contracts | Cost of sales
Pretax amount of gain (loss) reclassified from Accumulated Other Comprehensive Income (Loss)
Commodity forward contracts, gain/(loss) reclassified from accumulated other comprehensive income (loss)	137,000	$ (919,000)	$ (3,595,000)	$ (3,727,000)
Commodity forward contracts | Designated as Hedging Instrument | Other Current Assets
Derivative Asset [Abstract]
Commodity forward contracts, fair value of assets	1,557,000		1,557,000			0
Commodity forward contracts | Designated as Hedging Instrument | Other Current Liabilities
Derivative Liability [Abstract]
Commodity forward contracts, fair value of liabilities	0		0			4,445,000
Commodity forward contracts | Designated as Hedging Instrument | Other Noncurrent Assets
Derivative Asset [Abstract]
Commodity forward contracts, fair value of assets	486,000		486,000			0
Commodity forward contracts | Designated as Hedging Instrument | Other Noncurrent Liabilities
Derivative Liability [Abstract]
Commodity forward contracts, fair value of liabilities	0		0			0
Foreign currency forward contracts | Cost of sales
Pretax amount of gain (loss) reclassified from Accumulated Other Comprehensive Income (Loss)
Forward foreign currency contracts, gain/(loss) reclassified from accumulated other comprehensive income (loss)	(110,000)	(834,000)	(74,000)	(10,527,000)
Foreign currency forward contracts | Designated as Hedging Instrument | Other Current Assets
Derivative Asset [Abstract]
Foreign currency forward contracts, fair value of assets	1,126,000		1,126,000			2,875,000
Foreign currency forward contracts | Designated as Hedging Instrument | Other Current Liabilities
Derivative Liability [Abstract]
Foreign currency forward contracts, fair value of liabilities	81,000		81,000			1,442,000
Foreign currency forward contracts | Designated as Hedging Instrument | Other Noncurrent Assets
Derivative Asset [Abstract]
Foreign currency forward contracts, fair value of assets	19,000		19,000			1,095,000
Foreign currency forward contracts | Designated as Hedging Instrument | Other Noncurrent Liabilities
Derivative Liability [Abstract]
Foreign currency forward contracts, fair value of liabilities	0		0			18,000
Interest rate contracts | Interest expense
Pretax amount of gain (loss) reclassified from Accumulated Other Comprehensive Income (Loss)
Interest rate contracts, gain/(loss) reclassified from accumulated other comprehensive income (loss)	(673,000)	$ (1,011,000)	(2,179,000)	$ (3,041,000)
Interest rate contracts | Designated as Hedging Instrument | Other Current Assets
Derivative Asset [Abstract]
Interest rate contracts, fair value of assets	0		0			9,000
Interest rate contracts | Designated as Hedging Instrument | Other Current Liabilities
Derivative Liability [Abstract]
Interest rate contracts, fair value of liabilities	583,000		583,000			0
Interest rate contracts | Designated as Hedging Instrument | Other Noncurrent Assets
Derivative Asset [Abstract]
Interest rate contracts, fair value of assets	0		0			0
Interest rate contracts | Designated as Hedging Instrument | Other Noncurrent Liabilities
Derivative Liability [Abstract]
Interest rate contracts, fair value of liabilities	$ 2,036,000		$ 2,036,000			$ 2,448,000
Euros sold | Foreign currency forward contracts
Derivative [Line Items]
Notional amount | €					€ 49,820
Euros purchased | Foreign currency forward contracts
Derivative [Line Items]
Notional amount | €					€ 3,207

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Derivative Financial Instruments - Floating to fixed rate (Details) - Interest Rate Swap	Oct. 02, 2016 USD ($)
Derivative [Line Items]
Notional	$ 300,000,000
Notional amount to mature August 2017
Derivative [Line Items]
Notional	100,000,000
Fair Value	$ (574,000)
Pay Fixed	1.29%
Receive Floating	0.52%
Notional amount to mature August 2018
Derivative [Line Items]
Notional	$ 100,000,000
Fair Value	$ (1,781,000)
Pay Fixed	1.69%
Receive Floating	0.52%
Notional amount to mature November 2016
Derivative [Line Items]
Notional	$ 50,000,000
Fair Value	$ (9,000)
Pay Fixed	0.65%
Receive Floating	0.52%
Notional amount to mature November 2017
Derivative [Line Items]
Notional	$ 50,000,000
Fair Value	$ (254,000)
Pay Fixed	1.10%
Receive Floating	0.52%

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Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Oct. 02, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss)	$ (711,209)	$ (785,908)
Derivatives
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss)	256	(3,059)
Pension and Other Postretirement Benefits
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss)	(713,986)	(784,294)
Available-for-sale Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss)	$ 2,521	$ 1,445

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Net Receivables (Details) - USD ($) $ in Thousands	Oct. 02, 2016	Dec. 31, 2015
Receivables [Abstract]
Billed receivables	$ 378,641	$ 217,522
Unbilled receivables	1,486,721	1,454,327
Less allowance for doubtful accounts	(536)	(1,028)
Net receivables	1,864,826	1,670,821
Customer progress payments received	609,255	584,325
Unbilled receivables
Long-term unbilled receivables, relating to commercial aerospace programs	$ 293,200	$ 311,600

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Net Inventories (Details) - USD ($) $ in Thousands	Oct. 02, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Raw materials	$ 80,767	$ 88,365
Contracts in process	148,987	124,315
Finished goods	333	532
Net inventories	$ 230,087	$ 213,212

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Long-term Debt - Summary Of Debt (Details) - USD ($) $ in Thousands	Oct. 02, 2016	Dec. 31, 2015	Sep. 30, 2015	Oct. 31, 2013
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,595,000	$ 1,490,000
Unamortized debt issuance costs	12,358	14,164
Long-term debt less unamortized debt issuance costs	1,582,642	1,475,836
Current portion of long-term debt	40,000	40,000
Long-term debt	1,542,642	1,435,836
Senior Notes | 5.25% Senior Notes due 2021
Debt Instrument [Line Items]
Long-term debt, gross	300,000	300,000
Unamortized debt issuance costs	$ 1,668	1,915
Interest rate	5.25%			5.25%
Senior Notes | 5.50% Senior Notes due 2023
Debt Instrument [Line Items]
Long-term debt, gross	$ 400,000	400,000
Unamortized debt issuance costs	$ 5,372	5,947
Interest rate	5.50%		5.50%
Senior Credit Facility
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ 5,318	6,302
Senior Credit Facility | Term Loan | Term Loan A due 2020
Debt Instrument [Line Items]
Long-term debt, gross	760,000	790,000
Senior Credit Facility | Line of Credit | Revolving Credit Facility due 2020
Debt Instrument [Line Items]
Long-term debt, gross	$ 135,000	$ 0

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Long-term Debt - Senior Credit Facility (Details) - USD ($)	9 Months Ended
	Oct. 02, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Long-term debt	$ 1,595,000,000	$ 1,490,000,000
Senior Credit Facility | Line of Credit
Debt Instrument [Line Items]
Outstanding letters of credit	$ 128,121,000
Debt instrument, term (in years)	5 years
Senior Credit Facility | Line of Credit | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Senior Credit Facility | Line of Credit | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
Senior Credit Facility | Line of Credit | Term Loan A due 2020
Debt Instrument [Line Items]
Debt instrument, face amount	$ 800,000,000
Periodic principal payments	$ 10,000,000
Weighted average interest rate	2.33%
Senior Credit Facility | Line of Credit | Revolving Credit Facility due 2020
Debt Instrument [Line Items]
Revolving credit facility, maximum borrowing capacity	$ 1,000,000,000
Annual commitment fee on the unused portion (as a percent)	0.25%
Long-term debt	$ 135,000,000	$ 0
Line of credit facility, remaining borrowing capacity	736,879,000
Former Senior Credit Facility and New Senior Credit Facility | Line of Credit
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ 6,667,000

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Long-term Debt - Senior Notes (Details) - Senior Notes - USD ($)	9 Months Ended
	Oct. 02, 2016	Sep. 30, 2015	Oct. 31, 2013
5.50% Senior Notes due 2023
Debt Instrument [Line Items]
Debt instrument, face amount		$ 400,000,000
Interest rate	5.50%	5.50%
Percentage of principal amount at which the entity may redeem some or all of the notes prior to specified date	100.00%
Maximum redemption with net proceeds from equity offerings as percentage of original principal	35.00%
Redemption price with net proceeds from equity offerings as percentage of original principal	105.50%
Debt issuance costs	$ 6,136,000
Debt instrument, term (in years)	8 years
5.25% Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument, face amount			$ 300,000,000
Interest rate	5.25%		5.25%
Deferred finance costs	$ 2,625,000
Debt instrument, term (in years)	8 years

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Long-term Debt - Minimum loan payments (Details) - USD ($) $ in Thousands	Oct. 02, 2016	Dec. 31, 2015
Minimum payments on outstanding long-term debt
Remainder of 2016	$ 10,000
Calendar 2017	40,000
Calendar 2018	40,000
Calendar 2019	40,000
Calendar 2020	765,000
Thereafter	700,000
Total	$ 1,595,000	$ 1,490,000

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Long-term Debt - Covenants and Default Provisions (Details)	9 Months Ended
	Oct. 02, 2016 USD ($)
Debt Instrument [Line Items]
Subsidiary guarantors percentage owned	100.00%
Senior Credit Facility
Debt Instrument [Line Items]
Restricted debt limit	$ 250,000,000
Restricted debt limit percent of net income	50.00%

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Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Oct. 04, 2015	Oct. 02, 2016	Oct. 04, 2015
Pension Benefits
Change in benefit obligation
Service cost	$ 4,556	$ 4,815	$ 13,645	$ 14,445
Interest cost	25,360	30,348	76,186	90,866
Expected return on plan assets	(40,578)	(40,117)	(121,733)	(119,867)
Amortization of unrecognized net loss	31,355	37,690	94,167	112,989
Amortization of unrecognized prior service cost	(5,151)	(5,213)	(15,453)	(15,638)
Net periodic benefit cost	15,542	27,523	46,812	82,795
Special termination benefit cost / curtailment	0	0	1,673	0
Net periodic benefit cost (income)	15,542	27,523	48,485	82,795
Other Postretirement Benefits
Change in benefit obligation
Service cost	0	1	1	1
Interest cost	841	1,126	2,523	3,446
Expected return on plan assets	(780)	(922)	(2,405)	(2,732)
Amortization of unrecognized net loss	364	495	1,091	1,393
Amortization of unrecognized prior service cost	(1,291)	(1,813)	(3,871)	(5,706)
Net periodic benefit cost (income)	$ (866)	$ (1,113)	$ (2,661)	$ (3,598)

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Employee Benefit Plans - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Oct. 02, 2016	Oct. 02, 2016
Defined Benefit Plans
Increase in funded status	$ 36,444
Supplemental (nonqualified) executive retirement plan
Defined Benefit Plans
Employer's contribution to retirees during the period		$ 4,776
Estimated future employer contributions in current fiscal year		692
Other Postretirement Benefits
Defined Benefit Plans
Employer contributions directly to the pension trust for the period		4,814
Estimated future employer contributions in current fiscal year		2,674
Pension Benefits
Defined Benefit Plans
Contributions by employer		$ 39,500

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Income Taxes (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Oct. 04, 2015	Oct. 02, 2016	Oct. 04, 2015
Income Tax Disclosure [Abstract]
Effective income tax rate (as a percent)	18.00%	33.90%	25.90%	39.90%
Potential reduction of uncertain tax benefits over the next 12 months from audit settlements	$ 11,176,000		$ 11,176,000
Minimum increase in earnings from settlement of unrecognized tax benefits based on current estimates			0
Maximum increase in earnings from settlement of unrecognized tax benefits based on current estimates			$ 10,074,000

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Stock-based Compensation (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2016 USD ($) award plan $ / shares shares	Oct. 04, 2015 USD ($)	Oct. 02, 2016 USD ($) award plan $ / shares shares	Oct. 04, 2015 USD ($) $ / shares shares
Stock-Based Compensation
Number of authorized shares of preferred stock	5,000,000		5,000,000
Par value of preferred stock (in dollars per share) | $ / shares	$ 1.00		$ 1.00
Number of stock-based incentive plans | plan	5		5
Number of plans under which no new grants are being made | plan	4		4
Number of types of awards outstanding under the entity's stock incentive plans | award	5		5
Total pre-tax stock-based compensation expense | $	$ 6,317	$ 6,046	$ 17,515	$ 28,369
Total income tax benefit recognized in the income statement for share-based compensation | $	$ 2,182	$ 2,194	$ 6,445	$ 9,815
Restricted stock | Minimum
Stock-Based Compensation
Vesting period			1 year
Restricted stock | Maximum
Stock-Based Compensation
Vesting period			3 years
Stock options
Stock-Based Compensation
Minimum terms of options			7 years
Maximum terms of options			10 years
Number of years upon which expected volatility is based			7 years
Stock options granted			72,328	74,543
Weighted average fair value (in dollars per share) | $ / shares			$ 20.53	$ 39.44
Stock options | Minimum
Stock-Based Compensation
Vesting period			1 year
Stock options | Maximum
Stock-Based Compensation
Vesting period			3 years
Legacy ATK Plans
Stock-Based Compensation
Number of stock-based incentive plans | plan	3		3
Legacy Orbital Plans
Stock-Based Compensation
Number of stock-based incentive plans | plan	1		1
2005 Stock Incentive Plan
Stock-Based Compensation
Number of authorized common shares	3,750,000		3,750,000
Number of available shares to be granted	2,812,847		2,812,847
Fiscal 2015 through Fiscal 2017 period | Restricted stock
Stock-Based Compensation
Number of shares payable only upon the achievement of certain financial performance goals	53,449		53,449
Fiscal 2014 through fiscal 2016 period | Restricted stock
Stock-Based Compensation
Number of shares payable only upon the achievement of certain financial performance goals	42,935		42,935
Executive Officers and Key Employees | Fiscal 2016 through Fiscal 2018 period | Performance Shares
Stock-Based Compensation
Number of shares payable only upon the achievement of certain financial performance goals	73,802		73,802
Maximum percentage payable upon achieving performance goal related to earnings	50.00%		50.00%
Maximum percentage payable upon achieving performance goal related to sales growth	50.00%		50.00%
Executive Officers and Key Employees | Fiscal 2016 through Fiscal 2018 period | TSR Awards
Stock-Based Compensation
Number of shares payable only upon the achievement of certain financial performance goals	73,802		73,802
Executive Officers and Key Employees | Fiscal 2015 through Fiscal 2017 period | Performance Shares
Stock-Based Compensation
Number of shares payable only upon the achievement of certain financial performance goals	81,689		81,689
Maximum percentage payable upon achieving performance goal related to earnings	50.00%		50.00%
Maximum percentage payable upon achieving performance goal related to sales growth	50.00%		50.00%
Executive Officers and Key Employees | Fiscal 2015 through Fiscal 2017 period | TSR Awards
Stock-Based Compensation
Number of shares payable only upon the achievement of certain financial performance goals	81,689		81,689
Executive Officers and Key Employees | Tranche One | TSR Awards
Stock-Based Compensation
Restricted stock granted to non-employee directors and certain key employees (in shares)			73,802
Weighted average grant date fair value (in dollars per share) | $ / shares			$ 87.85
Executive Officers and Key Employees | Tranche Two | TSR Awards
Stock-Based Compensation
Restricted stock granted to non-employee directors and certain key employees (in shares)			3,208
Weighted average grant date fair value (in dollars per share) | $ / shares			$ 94.93
Non-employee Directors and Certain Key Employees | Restricted stock
Stock-Based Compensation
Restricted stock granted to non-employee directors and certain key employees (in shares)			160,242

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Contingencies (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Oct. 02, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Unbilled receivables for contract claims	$ 13,175	$ 25,042
Discount rate	0.20%	0.70%
Treasury constant maturities rate used to estimate discount rate (in years)	20 years
Estimated inflationary factor (as a percent)	1.90%
Environmental remediation
Amounts (payable)	$ (43,939)	$ (41,824)
Unamortized discount on liability	524	1,718
Present value amounts (payable)	(43,415)	(40,106)
Amounts receivable	19,762	18,236
Unamortized discount on receivable	(179)	(568)
Present value amounts receivable	19,583	$ 17,668
Discounted liability recorded in other current liabilities	5,706
Discounted receivable recorded in other current assets	$ 3,318
Minimum
Environmental remediation
Period beyond balance sheet date for classifying the environmental remediation as non-current (in years)	1 year
Estimated discounted reasonably possible costs of environmental remediation	$ 43,415
Maximum
Environmental remediation
Estimated discounted reasonably possible costs of environmental remediation	$ 68,340

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Share Repurchases (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Oct. 04, 2015	Oct. 02, 2016	Oct. 04, 2015	Feb. 27, 2017	Nov. 01, 2016	Oct. 29, 2015	Aug. 04, 2015	Mar. 11, 2015
Class of Stock [Line Items]
Stock repurchase program, authorized amount							$ 250,000,000	$ 100,000,000	$ 75,000,000
Stock repurchase program, number of shares authorized to be repurchased							3,250,000.00	1,400,000.0	1,000,000
Treasury stock purchased (in shares)	576,407	497,145	1,104,511	825,986
Treasury stock purchased	$ 43,750,000	$ 36,275,000	$ 87,991,000	$ 60,777,000
Subsequent Event
Class of Stock [Line Items]
Stock repurchase program, authorized amount					$ 450,000,000	$ 300,000,000
Stock repurchase program, number of shares authorized to be repurchased						4,000,000.0

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Changes in Estimates (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Oct. 04, 2015	Oct. 02, 2016	Oct. 04, 2015	Dec. 31, 2015
Changes in Estimates [Abstract]
Operating income adjustments under percentage of completion method	$ 6,000	$ 27,000	$ 92,000	$ 81,000
Estimated costs to complete on loss contracts	$ 1,248,549		$ 1,248,549		$ 1,392,218

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Restructuring Costs (Details) - USD ($) $ in Thousands	Oct. 02, 2016	Dec. 31, 2015
Termination Benefits
Realignment liability activity
Restructuring liabilities	$ 400	$ 3,589
Remaining Lease Rentals
Realignment liability activity
Restructuring liabilities	$ 19,570	$ 26,154

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Operating Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2016 USD ($)	Oct. 04, 2015 USD ($)	Oct. 02, 2016 USD ($) segment	Oct. 04, 2015 USD ($)	Dec. 31, 2015 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment			3
Results by operating segment
Sales	$ 1,043,702	$ 1,143,246	$ 3,183,442	$ 3,217,974
Income from continuing operations, before interest, income taxes and noncontrolling interest	90,976	136,810	359,000	241,962
Total assets	5,366,092		5,366,092		$ 5,323,695
Operating segments
Results by operating segment
Sales	1,043,702	1,143,246	3,183,442	3,217,974
Operating segments | Flight Systems Group
Results by operating segment
Sales	360,531	356,131	1,081,513	1,040,076
Income from continuing operations, before interest, income taxes and noncontrolling interest	43,886	94,015	151,454	186,247
Total assets	2,307,885		2,307,885		2,223,787
Operating segments | Defense Systems Group
Results by operating segment
Sales	451,286	440,749	1,326,076	1,355,703
Income from continuing operations, before interest, income taxes and noncontrolling interest	33,066	34,299	126,437	130,778
Total assets	1,287,290		1,287,290		1,184,071
Operating segments | Space Systems Group
Results by operating segment
Sales	231,885	346,366	775,853	822,195
Income from continuing operations, before interest, income taxes and noncontrolling interest	19,347	20,986	95,766	30,293
Total assets	1,242,167		1,242,167		1,272,425
Intercompany Sales
Results by operating segment
Revenues	0	0	0	0
Intercompany Sales | Flight Systems Group
Results by operating segment
Sales	2,463	7,173	9,542	42,041
Intercompany Sales | Defense Systems Group
Results by operating segment
Sales	4,668	1,488	14,396	18,892
Intercompany Sales | Space Systems Group
Results by operating segment
Sales	16,661	5,021	37,497	14,532
Corporate
Results by operating segment
Sales	(23,792)	(13,682)	(61,435)	(75,465)
Income from continuing operations, before interest, income taxes and noncontrolling interest	(5,323)	$ (12,490)	(14,657)	$ (105,356)
Total assets	$ 528,750		$ 528,750		$ 643,412