Overview

Amkor is one of the world's leading providers of outsourced semiconductor
packaging and test services. Our financial goals are sales growth and improved
profitability. To achieve these goals, we are focused on generating increased
value from our investments in advanced technologies, improving utilization of
existing assets, executing our balanced growth strategy and selectively growing
our scale and scope through strategic investments.
We are an industry leader in developing and commercializing advanced packaging
and test technologies. We believe these advanced technology solutions provide
substantial value to our customers, particularly in the mobile communications
market, where growth generally outpaces the overall semiconductor industry.
Advanced packages are now the preferred choice in both the high-end and the
mid-range segments of the smartphone market, which together account for a high
portion of mobile phone semiconductor value. The demand for advanced packages is
also being driven by second-wave mobile device customers, who are transitioning
out of wirebond into wafer-level and flip-chip packages. Interest in advanced
packages for automotive applications is growing as well, largely due to new,
data-intensive applications, which require increased pin count and performance.
We believe that our technology leadership and this technology transition create
significant growth opportunities for us.
We typically look for opportunities in the advanced packaging and test area
where we can generate reasonably quick returns on investments made for customers
seeking leading edge technologies. We also focus on developing a second wave of
customers to fill the capacity that becomes available when leading edge
customers transition to newer packaging and test equipment and platforms. In
addition, we are seeking to add new customers and to deepen our engagement with
existing customers. This includes an expanded emphasis on the automotive end
market where semiconductor content continues to grow and in the analog area for
our mainstream wirebond technologies.
From time to time, we identify attractive opportunities to grow our customer
base and expand the markets we serve through joint ventures, acquisitions and
other strategic investments. We believe that taking advantage of these
opportunities helps to diversify our revenue streams, improve our profits,
broaden our portfolio of services and maintain our technological leadership.
As a supplier in the semiconductor industry, our business is cyclical and
impacted by broad economic factors. Historical trends indicate there has been a
strong correlation between worldwide gross domestic product levels, consumer
spending and semiconductor industry cycles. The semiconductor industry has
experienced significant and sometimes prolonged cyclical upturns and downturns
in the past. We cannot predict the timing, strength or duration of any
correction, economic slowdown or subsequent economic recovery.
The full potential effect of the ongoing Covid-19 pandemic is unknown, and there
remains uncertainty related to the ultimate impact that the Covid-19 pandemic
will have on the global economy and our business, results of operations and
financial condition. See Part II, Item 1A, including, "The Covid-19 Outbreak Has
Impacted and May Continue to Impact the Supply Chain and Consumer Demand for Our
Customers' Products and Services, Which May Adversely Affect Our Business,
Results of Operations, and Financial Condition" and "Dependence on the Highly
Cyclical Semiconductor Industry - Our Packaging and Test Services Are Used in
Volatile Industries and Industry Downturns, and Declines in Global Economic and
Financial Conditions Could Harm Our Performance."
We operate in a capital-intensive industry. Servicing our current and future
customers requires that we incur significant operating expenses and continue to
make significant capital expenditures, which are generally made in advance of
the related revenues and without firm customer commitments. We fund our
operations, including capital expenditures and debt service requirements, with
cash flows from operations, existing cash and cash equivalents, short-term
investments, borrowings under available credit facilities and proceeds from any
additional financing. Maintaining an appropriate level of liquidity is important
to our business and depends on, among other considerations, the performance of
our business, our capital expenditure levels, our ability to repay debt out of
our operating cash flows or proceeds from debt or equity financings and our
investment strategy. As of March 31, 2021, we had cash and cash equivalents and
short-term investments of $650.3 million and $163.7 million, respectively.
Our net sales, gross profit, operating income, cash flows, liquidity and capital
resources have historically fluctuated significantly from quarter to quarter as
a result of many factors, including the seasonality of our business, the
cyclical

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nature of the semiconductor industry and other factors discussed in Part II,
Item 1A of this Quarterly Report on Form 10-Q.
Financial Summary
Our net sales increased $173.5 million or 15.1% to $1,326.2 million for the
three months ended March 31, 2021 from $1,152.6 million for the three months
ended March 31, 2020. The increase was generally attributable to higher sales in
the communications, computing and automotive and industrial end markets.
Gross margin for the three months ended March 31, 2021 increased to 20.0% from
16.4% for the three months ended March 31, 2020. The increase in gross margin
was primarily due to the increase in net sales and improved factory utilization
as well as a change in the mix of products sold toward products with a lower
material content, partially offset by unfavorable changes in foreign currency
exchange rates.
Our capital expenditures totaled $110.4 million for the three months ended March
31, 2021, compared to $55.9 million for the three months ended March 31, 2020.
Our spending was primarily focused on investments in advanced packaging and test
equipment.
Net cash provided by operating activities was $176.8 million for the three
months ended March 31, 2021, compared to $96.6 million for the three months
ended March 31, 2020. This increase was primarily due to higher net sales,
higher operating profit, and changes in working capital.

Results of Operations
The following table sets forth certain operating data as a percentage of net
sales for the periods indicated:
                                           For the Three Months Ended March 31,
                                                    2021                       2020
Net sales                                                        100.0  %     100.0  %
Materials                                                         43.2  %      45.3  %
Labor                                                             13.8  %      14.2  %
Other manufacturing costs                                         23.0  %      24.1  %
Gross margin                                                      20.0  %      16.4  %
Operating income                                                  10.9  %       7.3  %
Net income attributable to Amkor                                   9.0  %       5.5  %



Net Sales
                          For the Three Months Ended March 31,
                    2021                2020                  Change
                           (In thousands, except percentages)
Net sales   $    1,326,150          $ 1,152,616      $ 173,534        15.1  %


The increase in net sales for the three months ended March 31, 2021 compared to
the three months ended March 31, 2020 was due to higher sales in the
communications, computing and automotive and industrial end markets. The
increase in the communications end market was driven primarily by the further
adoption of 5G smartphones. The automotive and industrial market recovered
during the latest quarter from the weakened demand relating to the Covid-19
pandemic in the prior year.

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Gross Margin
                              For the Three Months Ended March 31,
                               2021                        2020          Change
                               (In thousands, except percentages)
Gross profit                               $265,534         $188,908      $76,626
Gross margin                                20.0  %          16.4  %       3.6  %


Our cost of sales consists principally of materials, labor, depreciation and
manufacturing overhead. Since a substantial portion of the costs at our
factories is fixed, there tends to be a strong relationship between our revenue
levels and gross margin. Accordingly, relatively modest increases or decreases
in revenue can have a significant effect on margin and on labor and other
manufacturing costs as a percentage of revenue, depending upon product mix,
utilization and seasonality.
Gross margin increased for the three months ended March 31, 2021 compared to the
three months ended March 31, 2020, primarily due to the increase in net sales
and improved factory utilization as well as a change in the mix of products sold
toward products with a lower material content, partially offset by unfavorable
changes in foreign currency exchange rates.
Selling, General and Administrative
                                                                       For 

the Three Months Ended March 31,


                                                             2021                2020                     Change
                                                                        (In thousands, except percentages)
Selling, general and administrative                    $      76,768          $ 72,582          $ 4,186              5.8  %


Selling, general and administrative expenses for the three months ended March
31, 2021 increased compared to the three months ended March 31, 2020, primarily
due to increased employee compensation costs and professional fees.
Research and Development
                                          For the Three Months Ended March 31,
                                      2021                  2020               Change
                                           (In thousands, except percentages)
Research and development   $      44,318                 $ 32,253      $ 12,065        37.4  %


Research and development activities are focused on developing new packaging and
test services and improving the efficiency and capabilities of our existing
production processes. The costs related to our technology and product
development projects are included in research and development expense until the
project moves into production. Once production begins, the costs related to
production become part of the cost of sales, including ongoing depreciation for
the equipment previously held for research and development activities. Research
and development expenses for the three months ended March 31, 2021 increased
compared to the three months ended March 31, 2020 due to new development
projects in advanced technologies, primarily advanced System-in-Package modules.
Other Income and Expense
                                                                     For 

the Three Months Ended March 31,


                                                          2021                2020                       Change
                                                                      (In thousands, except percentages)
Interest expense                                    $      12,673          $ 17,045          $ (4,372)             (25.6) %
Interest income                                              (279)           (2,258)            1,979              (87.6) %
Foreign currency (gain) loss, net                             619              (229)              848               >(100)%
Loss on debt retirement                                         -               428              (428)            (100.0) %
Other (income) expense, net                                  (251)             (256)                5               (2.0) %
Total other expense, net                            $      12,762          $ 14,730          $ (1,968)             (13.4) %



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Interest expense decreased for the three months ended March 31, 2021 compared to
the three months ended March 31, 2020, primarily due to the overall decrease in
our outstanding debt.
Interest income decreased for the three months ended March 31, 2021 compared to
the three months ended March 31, 2020, primarily due to lower interest rates in
the overall market.
Income Tax Expense
                               For the Three Months Ended March 31,
                                  2021                   2020        Change
                                          (In thousands)
Income tax expense   $       11,667                    $ 4,846      $ 6,821


Income tax expense, which includes foreign withholding taxes and minimum taxes,
reflects the applicable tax rates in effect in the various countries where our
income is earned and is subject to volatility depending on the relative mix of
earnings in each location. Income tax expense increased for the three months
ended March 31, 2021 compared to the three months ended March 31, 2020,
primarily due to the increase in income before tax.
During the three months ended March 31, 2021 and 2020, our subsidiaries in
Korea, the Philippines and Singapore operated under various tax holidays. As
these tax holidays expire, income earned in these jurisdictions will be subject
to higher statutory income tax rates, which may cause our effective tax rate to
increase.

Liquidity


We assess our liquidity based on our current expectations regarding sales and
operating expenses, capital spending, dividend payments, stock repurchases, debt
service requirements and other funding needs. Based on this assessment, we
believe that our cash flow from operating activities, together with existing
cash and cash equivalents, short-term investments and availability under our
credit facilities, will be sufficient to fund our working capital, capital
expenditures, dividend payments, debt service and other financial requirements
for at least the next twelve months.
Our liquidity is affected by, among other factors, volatility in the global
economy and credit markets, the performance of our business, our capital
expenditure levels, other uses of our cash including any dividends and purchases
of stock under any stock repurchase program, any acquisitions or investments in
joint ventures and our ability to either repay debt out of operating cash flow
or refinance it at or prior to maturity with the proceeds of debt or equity
offerings. There can be no assurance that we will generate the necessary net
income or operating cash flows, or be able to borrow sufficient funds, to meet
the funding needs of our business beyond the next twelve months due to a variety
of factors, including the cyclical nature of the semiconductor industry and
other factors discussed in Part II, Item 1A of this Quarterly Report on Form
10-Q.
Our primary source of cash and the source of funds for our operations are cash
flows from operations, current cash and cash equivalents, short-term
investments, borrowings under available credit facilities and proceeds from any
additional debt or equity financings. We refer you to Note 7 and Note 11 to our
Consolidated Financial Statements in Part 1, Item 1 of this Quarterly Report on
Form 10-Q for additional information on our investments and borrowings,
respectively.
As of March 31, 2021, we had cash and cash equivalents and short-term
investments of $814.0 million. Included in our cash and short-term investments
balances as of March 31, 2021, is $664.8 million held offshore by our foreign
subsidiaries. We have the ability to access cash held offshore by our foreign
subsidiaries primarily through the repayment of intercompany debt obligations.
Due to the changes in the U.S. tax law under the Tax Cuts and Jobs Act ("Tax
Act"), distributions of cash to the U.S. as dividends generally will not be
subject to U.S. federal income tax. If we were to distribute this offshore cash
to the U.S. as dividends from our foreign subsidiaries, we may be subject to
foreign withholding and state income taxes.
For certain accounts receivable, we use non-recourse factoring arrangements with
third-party financial institutions to manage our working capital and cash flows.
Under this program, we sell receivables to a financial institution for cash at a
discount to the face amount. Available capacity under these programs is
dependent on the level of our trade accounts receivable eligible to be sold, the
financial institutions' willingness to purchase such receivables and the limits
provided by the financial institutions. These factoring arrangements can be
reduced or eliminated at any time due to market

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conditions and changes in the credit worthiness of customers. For the three
months ended March 31, 2021 and 2020, we sold accounts receivable totaling
$106.3 million and $170.5 million, net of discounts and fees of $0.2 million and
$1.0 million, respectively.
We operate in a capital-intensive industry. Servicing our current and future
customers may require that we incur significant operating expenses and make
significant investments in equipment and facilities, which are generally made in
advance of the related revenues and without firm customer commitments.
The borrowing base under our $250.0 million first lien senior secured revolving
credit facility entered into by our subsidiary, Amkor Technology Singapore
Holding Pte, Ltd. (the "Singapore Revolver"), is limited to the amount of
eligible accounts receivable. As of March 31, 2021, we had availability of
$250.0 million and no outstanding standby letters of credit. As of March 31,
2021, our foreign subsidiaries had $316.0 million available to be drawn under
revolving credit facilities, including the Singapore Revolver, and $62.0 million
available to be borrowed under term loan credit facilities for working capital
purposes and capital expenditures.
As of March 31, 2021, we had $1.1 billion of debt. Our scheduled principal
repayments on debt include $103.2 million due over the remainder of 2021, $131.2
million due in 2022, $163.0 million due in 2023, $120.3 million due in 2024,
$26.0 million due in 2025, and $553.3 million due thereafter. We were in
compliance with all debt covenants at March 31, 2021, and we expect to remain in
compliance with these covenants for at least the next twelve months.
Certain of our debt agreements have restrictions on dividend payments and the
repurchase of stock and subordinated securities. These restrictions are
determined in part by our covenant compliance and on calculations based upon
cumulative net income or, in the case of our Singapore Revolver, borrowing
availability and do not currently have a material impact on our ability to make
dividend payments or stock repurchases.
The debt of Amkor Technology, Inc. is structurally subordinated in right of
payment to all existing and future debt and other liabilities of our
subsidiaries. From time to time, Amkor Technology, Inc. and Amkor Technology
Singapore Holding Pte, Ltd. also guarantee certain debt of our subsidiaries.
In order to reduce our debt and future cash interest payments, we may from time
to time repurchase or redeem our outstanding notes for cash or exchange shares
of our common stock for our outstanding notes. Any such transaction may be made
in the open market, through privately negotiated transactions or otherwise and
would be subject to the terms of our indentures and other debt agreements,
market conditions and other factors.
Our subsidiary in Korea maintains an unfunded severance plan that covers certain
employees that were employed prior to August 1, 2015. As of March 31, 2021, the
severance liability was $95.1 million. Accrued severance benefits are estimated
assuming all eligible employees were to terminate their employment at the
balance sheet date. For service periods subsequent to August 1, 2015, employees
participate in either a defined benefit pension plan or a defined contribution
pension plan. From time to time, we may offer employees the option to convert
from the severance plan to the defined contribution plan, which would require
the company to fund the converted portion of the liability.
In October 2020, our Board of Directors approved the initiation of a regular
quarterly cash dividend on our common stock. We paid a quarterly dividend of
$0.04 per share representing a dividend payment of $9.7 million in the
aggregate, on March 15, 2021 to stockholders of record as of February 23, 2021.
We currently anticipate that we will continue to pay quarterly cash dividends in
the future. However, the payment, amount and timing of future dividends remain
within the discretion of our Board of Directors and will depend upon our results
of operations, financial condition, cash requirements, debt restrictions and
other factors.
Our Board of Directors previously authorized the repurchase of up to $300.0
million of our common stock, exclusive of any fees, commissions or other
expenses. At March 31, 2021, approximately $91.6 million was available to
repurchase common stock pursuant to the stock repurchase program. The purchase
of stock may be made in the open market or through privately negotiated
transactions. The timing, manner, price and amount of any repurchases will be
determined by us at our discretion and will depend upon a variety of factors
including economic and market conditions, the cash needs and investment
opportunities for the business, the current market price of our stock,
applicable legal requirements and other factors. We have not purchased any stock
under the program since 2012.


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Capital Resources
We make significant capital expenditures in order to service the demand of our
customers, which are primarily focused on investments in advanced packaging and
test equipment. We expect 2021 capital expenditures to be approximately $700
million. During the three months ended March 31, 2021, our capital expenditures
totaled $110.4 million. Ultimately, the amount of our 2021 capital expenditures
will depend on several factors including, among others, the timing and
implementation of any capital projects under review, the performance of our
business, economic and market conditions, the cash needs and investment
opportunities for the business, the need for additional capacity to service
anticipated customer demand, equipment lead times and the availability of cash
flows from operations or financing.
In addition, we are subject to risks associated with our capital expenditures,
including those discussed in Part II, Item 1A of this Quarterly Report on Form
10-Q under the caption "Capital Expenditures - We Make Substantial Investments
in Equipment and Facilities to Support the Demand of Our Customers, Which May
Adversely Affect Our Business if the Demand of Our Customers Does Not Develop as
We Expect or Is Adversely Affected."

Cash Flows
Net cash provided by (used in) operating, investing and financing activities for
the three months ended March 31, 2021 and 2020, was as follows:
                                 For the Three Months Ended March 31,
                                         2021                          2020
                                            (In thousands)
Operating activities   $            176,788                         $  96,589
Investing activities               (164,372)                         (104,592)
Financing activities                (49,444)                           55,095


Operating activities:  Our cash flow provided by operating activities for the
three months ended March 31, 2021 increased by $80.2 million compared to the
three months ended March 31, 2020, primarily due to higher net sales, higher
operating profit, and changes in working capital.
Investing activities:  Our cash flow used in investing activities for the three
months ended March 31, 2021 increased by $59.8 million compared to the three
months ended March 31, 2020, primarily due to increases in purchases of
property, plant, and equipment, purchases of investments and net payments on
foreign exchange forward contracts, partially offset by proceeds from sales and
maturities of investments. Payments for property, plant and equipment can
fluctuate based on timing of purchase, receipt and acceptance of equipment.
Financing activities:  The net cash used in financing activities for the three
months ended March 31, 2021 was primarily due to net debt repayments in Japan
and the payment of our quarterly dividends. The net cash provided by financing
activities for the three months ended March 31, 2020 was primarily due to the
draw downs of our Singapore and Taiwan revolvers, partially offset by net
repayment of debt in Korea.
We provide the following supplemental data to assist our investors and analysts
in understanding our liquidity and capital resources. We define free cash flow
as net cash provided by operating activities less payments for property, plant
and equipment, plus proceeds from the sale of and insurance recovery for
property, plant and equipment, if applicable. Free cash flow is not defined by
U.S. GAAP. We believe free cash flow to be relevant and useful information to
our investors because it provides them with additional information in assessing
our liquidity, capital resources and financial operating results. Our management
uses free cash flow in evaluating our liquidity, our ability to service debt,
our ability to fund capital expenditures and our ability to pay dividends and
the amount of dividends to be paid. However, free cash flow has certain
limitations, including that it does not represent the residual cash flow
available for discretionary expenditures since other, non-discretionary
expenditures, such as mandatory debt service, are not deducted from the measure.
The amount of mandatory versus discretionary expenditures can vary significantly
between periods. This measure should be considered in addition to, and not as a
substitute for, or superior to, other measures of liquidity or financial
performance prepared in accordance with U.S. GAAP, such as net cash provided by
operating activities. Furthermore, our definition of free cash flow may not be
comparable to similarly titled measures reported by other companies.

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                                                                  For the Three Months Ended March 31,
                                                                        2021                  2020
                                                                             (In thousands)
Net cash provided by operating activities                         $     176,788          $    96,589
Payments for property, plant and equipment                             (110,351)             (55,888)
Proceeds from sale of and insurance recovery for property, plant
and equipment                                                               547                1,887
Free cash flow                                                    $      66,984          $    42,588



Contractual Obligations
The following table summarizes our contractual obligations at March 31, 2021 and
the effect such obligations are expected to have on our liquidity and cash flows
in future periods.
                                                                                        Payments Due for Year Ending December 31,
                                                          2021 -
                                      Total              Remaining             2022               2023               2024              2025            Thereafter
                                                                                           (In thousands)
Total debt                        $ 1,096,897          $  103,162          $ 131,151          $ 163,011          $ 120,313          $ 25,975          $  553,285
Scheduled interest payment
obligations (1)                       250,552              24,034             42,098             39,464             37,241            36,231              71,484
Purchase obligations (2)              476,447             440,593             13,202             13,025              4,678             1,907               3,042
Operating lease obligations (3)       139,700              43,423             41,553             20,284              9,790             7,639            

17,011


Finance lease obligations (3)          24,107               9,922              6,396              3,787              1,038               969               1,995
Severance obligations (4)              95,124               8,128              9,453              8,403              7,469             6,652              55,019

Total contractual obligations $ 2,082,827 $ 629,262 $ 243,853 $ 247,974 $ 180,529 $ 79,373 $ 701,836




(1)Represents interest payment obligations calculated using stated coupon rates
for fixed rate debt and interest rates applicable at March 31, 2021, for
variable rate debt.
(2)Represents off-balance sheet purchase obligations for capital expenditures,
long-term supply contracts and other contractual commitments outstanding at
March 31, 2021.
(3)Represents future minimum lease payments including interest payments.
(4)Represents estimated benefit payments for our Korean subsidiary severance
plan.
In addition to the obligations identified in the table above, other non-current
liabilities recorded in our Consolidated Balance Sheet at March 31, 2021
include:
•$61.5 million of foreign pension plan obligations, for which the timing and
actual amount of impact on our future cash flow is uncertain.
•$30.0 million net liability associated with unrecognized tax benefits. Due to
the uncertainty regarding the amount and the timing of any future cash outflows
associated with our unrecognized tax benefits, we are unable to reasonably
estimate the amount and period of ultimate settlement, if any, with the various
taxing authorities.
Off-Balance Sheet Arrangements
As of March 31, 2021, we had no off-balance sheet guarantees or other
off-balance sheet arrangements as defined in Item 303(a)(4)(ii) of SEC
Regulation S-K.
Contingencies, Indemnifications and Guarantees
We refer you to Note 15 to our Consolidated Financial Statements in Part I, Item
1 of this Quarterly Report on Form 10-Q for a discussion of our contingencies
related to litigation and other legal matters.

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Critical Accounting Policies
Our critical accounting policies are disclosed in our Annual Report on Form 10-K
for the year ended December 31, 2020. During the three months ended March 31,
2021, there were no significant changes in our critical accounting policies as
reported in our 2020 Annual Report on Form 10-K.

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