The accompanying unaudited statements have been prepared in accordance with U.S. generally accepted accounting principles for interim financial information. Accordingly, they do not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments, consisting of normal recurring accruals, considered necessary for a fair presentation have been included.

The results of operations for any interim period are not necessarily indicative of results for the full year. In addition, the COVID-19 pandemic could increasehas increased the volatility we experience in our financial results in recent periods and this could continue in future interim and annual periods. Operating results for the three months ended March 28, 2020April 3, 2021 are not necessarily indicative of the results that may be expected for the year ending December 31, 2020.2021.

The balance sheet at December 31, 20192020 has been derived from the audited financial statements at that date, but does not include all of the information and footnotes required by U.S. generally accepted accounting principles (“GAAP”) for complete financial statements.

For further information, refer to the financial statements and footnotes thereto included in Astronics Corporation’s 20192020 annual report on Form 10-K.

Astronics Corporation (“Astronics” or the “Company”) is a leading provider of advanced technologies to the global aerospace, defense and electronics industries. Our products and services include advanced, high-performance electrical power generation, distribution and motion systems, lighting and safety systems, avionics products, systems and certification, aircraft structures and automated test systems.

We have principal operations in the United States (“U.S.”), Canada, France and England, as well as engineering offices in the Ukraine and India.

On February 13, 2019, the Company completed a divestiture of its semiconductor test business within the Test Systems segment. The business wastransaction included 2 elements of contingent earnouts. The First Earnout is calculated based on a multiple of all future sales of existing and certain future derivative products to existing and future customers in each annual period from 2019 through 2022. The First Earnout may not coreexceed $35.0 million in total. The Second Earnout is calculated based on a multiple of future sales related to an existing product and program with an existing customer exceeding an annual threshold for each annual period from 2019 through 2022. The Second Earnout is not capped. For the Second Earnout, if the applicable sales in an annual period do not exceed the annual threshold, 0 amounts will be paid relative to such annual period; the sales in such annual period do not carry over to the next annual period. Due to the degree of uncertainty associated with estimating the future sales levels of the Test Systems segment. The totaldivested business and its underlying programs, and the lack of reliable predictive market information, the Company will recognize such earnout proceeds, ofif received, as additional gain on sale when such proceeds are realized or realizable.

In February 2021, the divestiture amountedCompany was notified by the buyer that they have calculated $10.7 million as being payable to $103.8the Company under the contingent earnouts related to the year ended December 31, 2020. In April 2021, the buyer provided a revised calculation, indicating, rather, that $7.1 million plus certain contingent purchase consideration (“earn-out”) as described in Note 18.is payable to the Company for the 2020 earnout. The Company recorded a pre-taxand the buyer are currently reviewing the calculations and underlying data and are engaged in negotiations. The Company expects to record the additional gain for whatever amount is realized on the sale when that review is complete and agreement is reached. The timing and amount of $80.1 million inany amount realized is uncertain and subject to risks and uncertainties as we continue the first quarter of 2019. The Company recorded income tax expense relating to the gain of $19.7 million.

In December 2019, a novel strain of coronavirus (“COVID-19”) surfaced in Wuhan, China, and has since spread to other countries, including the United States. On March 11, 2020, the World Health Organization classified the COVID-19 outbreak as a pandemic. The COVID-19 pandemic has had a sudden and significant impact on the global economy, and particularly in the

aerospace industry, resulting in the grounding of the majority of the global commercial transportation fleet and significant cost cutting and cash preservation actions by the global airlines. This in turn has resulted in a significant reduction in airlines spending for both new aircraft and on upgrading their existing fleet with the Company’s products. We expect thisThis low level of investment by the airlines will continue at least through 2020, however,has continued into 2021, and while the industry is seeing some improvement on rising vaccination rates and easing travel restrictions, the ultimate impact of COVID-19 on our business results of operations, financial condition and cash flows is dependent on future developments, including the duration of the pandemic, vaccination rates and efficacy and the related length of its impact on the global economy and the aerospace industry, which are uncertain and cannot be predicted at this time.

The Company's exposure to credit losses may increase if its customers are adversely affected by global economic recessions, disruption associated with the current COVID-19 pandemic, industry conditions, or other customer-specific factors. Although the Company has historically not experienced significant credit losses, it is possible that there could be a material adverse impact from potential adjustments of the carrying amount of trade receivables and contract assets as airlines and other aerospace company’s cash flows are impacted by the COVID-19 pandemic.

Cost of products sold includes the costs to manufacture products such as direct materials and labor and manufacturing overhead as well as all engineering and development costs. The Company is engaged in a variety of engineering and design activities as well as basic research and development activities directed to the substantial improvement or new application of the Company’s existing technologies. These costs are expensed when incurred and included in cost of products sold. Research and development, design and related engineering amounted to $26.2$21.6 million and $26.7$26.2 million for the three months ended April 3, 2021 and March 28, 2020, and March 30, 2019, respectively. Selling, general and administrative expenses include costs primarily related to our sales and marketing departments and administrative departments. Interest expense is shown net of interest income. Interest income was insignificant for the three months ended April 3, 2021 and March 28, 2020 and March 30, 2019.2020.

The Company tests goodwill at the reporting unit level on an annual basis or more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount.

As a result of the qualitative factors related to the COVID-19 pandemic, as discussed above, we performed interim quantitative assessments for the reporting units which had goodwill as of March 28, 2020. Based on our quantitative assessment, the Company recorded goodwill impairment charges associated with 4 Aerospace reporting units, totaling approximately $73.7 million within the Impairment Loss line in the Consolidated Condensed Statement of Operations in the three months ended March 28, 2020.

For additional information regarding the quantitative test and the related goodwill impairment see Note 6.

Long-lived assets are evaluated for recoverability whenever adverse effects or changes in circumstances indicate that the carrying value may not be recoverable. The recoverability test consists of comparing the undiscounted projected cash flows with the carrying amount. Should the carrying amount exceed undiscounted projected cash flows, an impairment loss would be recognized to the extent the carrying amount exceeds fair value. In conjunction with the deteriorating economic conditions associated with the COVID-19 pandemic, we recorded an impairment charge to right-of-use (“ROU”) assets of approximately $0.7 million incurred in one reporting unit in the Aerospace segment within the Impairment Loss line in the Consolidated Condensed Statement of Operations in the three months ended March 28, 2020. No otherAs of April 3, 2021, the Company concluded that no indicators of additional impairment relating to long-lived asset impairments were warranted based on the quantitative analysis performed.

The aggregate foreign currency transaction gain or loss included in operations was insignificant for the three months ended April 3, 2021 and March 28, 2020 and March 30, 2019.2020.

We consider the applicability and impact of all ASUs. ASUs not listed above were assessed and determined to be either not applicable, or had or are expected to have minimal impact on our financial statements and related disclosures.

Revenue is recognized when, or as, the Company transfers control of promised products or services to a customer in an amount that reflects the consideration the Company expects to be entitled in exchange for transferring those products or services. Sales shown on the Company's Consolidated Condensed Statements of Operations are from contracts with customers.

Payment terms and conditions vary by contract, although terms generally include a requirement of payment within a range from 30 to 90 days after the performance obligation has been satisfied; or in certain cases, up-front deposits. In circumstances where the timing of revenue recognition differs from the timing of invoicing, the Company has determined that the Company's contracts generally do not include a significant financing component. Taxes collected from customers, which are subsequently remitted to governmental authorities, are excluded from sales.

The Company recognizes an asset for the incremental, material costs of obtaining a contract with a customer if the Company expects the benefit of those costs to be longer than one year and the costs are expected to be recovered. These incremental costs include, but are not limited to, sales commissions incurred to obtain a contract with a customer. As of March 28, 2020,April 3, 2021, the Company does not have material incremental costs on any open contracts with an original expected duration of greater than one year.

The Company recognizes an asset for certain, material costs to fulfill a contract if it is determined that the costs relate directly to a contract or an anticipated contract that can be specifically identified, generate or enhance resources that will be used in satisfying performance obligations in the future, and are expected to be recovered. Such costs are amortized on a systematic basis that is consistent with the transfer to the customer of the goods to which the asset relates. Start-up costs are expensed as incurred. Capitalized fulfillment costs are included in Inventories in the accompanying Consolidated Condensed Balance Sheets. Should future orders not materialize or it is determined the costs are no longer probable of recovery, the capitalized costs are written off. As of March 28, 2020,April 3, 2021, the Company does not have material capitalized fulfillment costs.

A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the unit of account. The majority of our contracts have a single performance obligation as the promise to transfer the individual goods or services is not separately identifiable from other promises in the contracts which are, therefore, not distinct. Thus, the contract's transaction price is the revenue recognized when or as that performance obligation is satisfied. Promised goods or services that are immaterial in the context of the contract are not separately assessed as performance obligations.

Some of our contracts have multiple performance obligations, most commonly due to the contract covering multiple phases of the product lifecycle (development, production, maintenance and support). For contracts with multiple performance obligations, the contract’s transaction price is allocated to each performance obligation using our best estimate of the standalone selling price of each distinct good or service in the contract. The primary method used to estimate standalone selling price is the expected cost plus margin approach, under which expected costs are forecast to satisfy a performance obligation and then an

appropriate margin is added for that distinct good or service. Shipping and handling activities that occur after the customer has obtained control of the good are considered fulfillment activities, not performance obligations.

Some of our contracts offer price discounts or free units after a specified volume has been purchased. The Company evaluates these options to determine whether they provide a material right to the customer, representing a separate performance obligation. If the option provides a material right to the customer, revenue is allocated to these rights and recognized when those future goods or services are transferred, or when the option expires.

Contract modifications are routine in the performance of our contracts. Contracts are often modified to account for changes in contract specifications or requirements. In most instances, contract modifications are for goods or services that are distinct, and, therefore, are accounted for as new contracts. The effect of modifications has been reflected when identifying the satisfied and unsatisfied performance obligations, determining the transaction price and allocating the transaction price.

The majority of the Company’s revenue from contracts with customers is recognized at a point in time, when the customer obtains control of the promised product, which is generally upon delivery and acceptance by the customer. These contracts may provide credits or incentives, which may be accounted for as variable consideration. Variable consideration is estimated at the most likely amount to predict the consideration to which the Company will be entitled, and only to the extent it is probable that a subsequent change in estimate will not result in a significant revenue reversal when estimating the amount of revenue to recognize. Variable consideration is treated as a change to the sales transaction price and based on an assessment of all information (i.e., historical, current and forecasted) that is reasonably available to the Company, and estimated at contract inception and updated at the end of each reporting period as additional information becomes available. Most of our contracts do not contain rights to return product; where this right does exist, it is evaluated as possible variable consideration.

For contracts that are subject to the requirement to accrue anticipated losses, the companyCompany recognizes the entire anticipated loss in the period that the loss becomes probable.

For contracts with customers in which the Company promises to provide a product to the customer that has no alternative use to the Company and the Company has enforceable rights to payment for progress completed to date inclusive of profit, the Company satisfies the performance obligation and recognizes revenue over time, using costs incurred to date relative to total estimated costs at completion to measure progress toward satisfying our performance obligations. Incurred cost represents work performed, which corresponds with, and thereby best depicts, the transfer of control to the customer. Contract costs include labor, material and overhead.

The Company also recognizes revenue from service contracts (including service-type warranties) over time. The Company recognizes revenue over time during the term of the agreement as the customer is simultaneously receiving and consuming the benefits provided throughout the Company’s performance. The Company typically recognizes revenue on a straight-line basis throughout the contract period.

On March 28, 2020,April 3, 2021, we had $369.4$297.5 million of remaining performance obligations, which we refer to as total backlog. We expect to recognize approximately $268.1$217.2 million of our remaining performance obligations as revenue in 2020. As a result of the COVID-19 pandemic, the Company received order cancellations from customers subsequent to the period ending March 28,

Costs in excess of billings includes unbilled amounts resulting from revenues under contracts with customers that are satisfied over time and when the cost-to-cost measurement method of revenue recognition is utilized and revenue recognized exceeds the amount billed to the customer, and right to payment is not just subject to the passage of time. Amounts may not exceed their net realizable value. Costs in excess of billings are classified as current assets, within Accounts Receivable, Net of Allowance for Doubtful AccountsEstimated Credit Losses on our Consolidated Condensed Balance Sheet.Sheets.

Billings in excess of cost includes billings in excess of revenue recognized as well as other elements of deferred revenue, which includes advanced payments, up-front payments, and progress billing payments. Billings in excess of cost are reported in our Consolidated Condensed Balance SheetSheets, classified as current liabilities, within Customer Advance Payments and Deferred Revenue, and non-current liabilities, within Other Liabilities. To determine the revenue recognized in the period from the beginning balance of billings in excess of cost, the contract liability as of the beginning of the period is recognized as revenue on a contract-by-contract basis when the Company satisfies the performance obligation related to the individual contract. Once the beginning contract liability balance for an individual contract has been fully recognized as revenue, any additional payments received in the period are recognized as revenue once the related costs have been incurred.

We recognized $8.3 million and $8.7 million and $8.2 million duringfor the three months ended April 3, 2021 and March 28, 2020, and March 30, 2019, respectively, in revenues that were included in the contract liability balance at the beginning of the period.

The Company's contract assets and contract liabilities consist primarily of costs and profits in excess of billings and billings in excess of cost and profits, respectively. The following table presents the beginning and ending balances of contract assets and contract liabilities during the three months ended March 28, 2020:April 3, 2021:

The following table presents our revenue disaggregated by Market Segments as follows:

The following table presents our revenue disaggregated by Product Lines as follows:

Inventories consisted of the following:

Property, Plant and Equipment consisted of the following:

Amortization expense for acquired intangible assets expected for 20202021 and for each of the next five years is summarized as follows:

The following table summarizes the changes in the carrying amount of goodwill for the three months ended March 28, 2020:April 3, 2021:

The Company tests goodwill at the reporting unit level on an annual basis or more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount.

We recognized full impairmentsAs of the goodwill of our Astronics Connectivity Systems and Certification (“ACSC”), PGA and Custom Control Concepts (“CCC”) reporting units, and a partial impairment of the goodwill of our PECO reporting unit. The goodwill remaining in our PECO reporting unit after the write off is $32.8 million. For the PECO reporting unit with a partial goodwill write-off,April 3, 2021, the Company concluded that no indicators of additional impairment relating to intangible assets or goodwill existed and an interim test was not performed sensitivity analyses, utilizing reasonably possible changes in the assumption for the discount rate and revenue growth rates to demonstrate the potential impacts to the estimated fair value. In isolation, a 100 basis point increase to the discount rate or a 100 basis point decrease to the normalized revenue growth rate, would result in incremental impairment charges of $9.3 million or $4.4 million, respectively.

The Company's Fifth Amended and Restated Credit Agreement (the “Agreement”) provided for a $500 million revolving credit line with the option to increase the line by up to $150 million. The maturity date of the loans under the Agreement is February 16, 2023. At March 28, 2020, there was $333.0 million outstanding on the revolving credit facility and there remained $165.5 million available, net of outstanding letters of credit and bank guarantees. The credit facility allocates up to $20 million of the $500 million revolving credit line for the issuance of letters of credit, including certain existing letters of credit. At March 28, 2020, outstanding letters of credit and bank guarantees totaled $1.5 million.

At April 3, 2021, there was $173.0 million outstanding on the suspension period,revolving credit facility and there remained $200.9 million available subject to the amendedminimum liquidity covenant discussed below, net of outstanding letters of credit. The credit facility allocates up to $20 million of the $375 million revolving credit line for the issuance of letters of credit, including certain existing letters of credit. At April 3, 2021, outstanding letters of credit totaled $1.1 million.

Through the third quarter of 2021, the Amended Facility requires the Company to maintain minimum liquidity, defined as unrestricted cash plus the unused revolving credit commitments, of $180 million at all times, andtimes. Through the second quarter of 2021, the Company is required to maintain a minimum interest coverage ratio of 1.75x on a quarterly basis, except for the first quarter of 2021, which iswas set at 1.50x. The Company was in compliance with its financial covenants at April 3, 2021. During the suspension period, the Company will pay interest on the unpaid principal amount of the amended facilityAmended Facility at a rate equal to one-, three- or six-month LIBOR (which shall be at least 1.00%) plus 2.25%. The Company will also pay a commitment fee to the lenders in an amount equal to 0.35% on the undrawn portion of the credit facility.Amended Facility. After the suspension period, the Company will pay interest on the unpaid principal amount of the amended facilityAmended Facility at a rate equal to one-, three- or six-month LIBOR (which shall be at least 1.00%) plus between 1.00% to 2.25% based upon the Company’s leverage ratio. The Company will also pay a commitment fee to the lenders in an amount equal to 0.10% to 0.35% on the undrawn portion of the credit facility,Amended Facility, based upon the Company’s leverage ratio. The amended facility providesAmended Facility provided for the payment of a consent fee of 15 basis points of the commitment for each consenting lender.

The Company’s obligations under the Credit Agreement as amendedAmended Facility are jointly and severally guaranteed by each domestic subsidiary of the Company other than non-material subsidiaries. The obligations are secured by a first priority lien on substantially all of the Company’s and the guarantors’ assets.

In the event of voluntary or involuntary bankruptcy of the Company or any subsidiary, all unpaid principal and other amounts owing under the Credit AgreementAmended Facility automatically become due and payable. Other events of default, such as failure to make payments as they become due and breach of financial and other covenants, change of control, judgments over a certain amount, and cross default under other agreements give the agent the option to declare all such amounts immediately due and payable.

The Company has operating and finance leases for leased office and manufacturing facilities and equipment leases. We have concluded that when an agreement grants us the right to substantially all of the economic benefits associated with an identified asset, and we are able to direct the use of that asset throughout the term of the agreement, we havethe agreement contains a lease. We lease certain facilities and office equipment under finance leases, and we lease certain production facilities, office equipment and vehicles under operating leases. Some of our leases include options to extend or terminate the leases and these options have been included in the relevant lease term to the extent that they are reasonably certain to be exercised.

The following is a summary of the Company's ROU assets and liabilities:

The following is a summary of the Company's total lease costs: