You should read the following discussion of our financial condition and results
of operations together with our unaudited condensed consolidated financial
statements and the related notes and other financial information included
elsewhere in this Quarterly Report on Form 10-Q and our Annual Report on Form
10-K filed with the SEC on February 18, 2020. The following discussion contains
forward-looking statements that reflect our plans, estimates and beliefs. Our
actual results could differ materially from those discussed in the
forward-looking statements. Factors that could cause or contribute to these
differences include those discussed below and elsewhere in this Quarterly Report
on Form 10-Q, particularly in the section titled "Risk Factors" under Part II,
Item 1A below.
Company Overview
Our mission is to deliver high-speed coherent optical interconnect products that
transform communications networks, relied upon by cloud infrastructure operators
and content and communication service providers, through improvements in
performance and capacity and reductions in associated costs. By implementing
optical interconnect technology in a silicon-based platform, a process we refer
to as the siliconization of optical interconnect, we believe we are leading a
disruption that is analogous to the computing industry's integration of multiple
functions into a microprocessor. Our products fall into three product groups:
embedded modules, pluggable modules and semiconductors. Our embedded module and
pluggable module product groups consist of optical interconnect modules with
transmission speeds ranging from 100 to 1,200 gigabits per second, or Gbps, for
use in long-haul, metro and inter-data center markets. Our semiconductor product
group consists of our low-power coherent digital signal processor
application-specific integrated circuits, or DSP ASICs, and our silicon photonic
integrated circuits, or silicon PICs, which are either integrated into our
embedded and pluggable modules or sold to customers on a standalone basis for
integration into internally developed or other merchant modules. We are also
developing a 400ZR module that will expand our pluggable module product group,
and enable inter-data center transmission capacity of 400 Gbps in the same
compact pluggable form factors used for 400G client optics, including QSFP-DD
and OSFP. Our 400 Gbps pluggable product family will also include a new CFP2-DCO
module that supports transmission rates up to 400 Gbps and the OpenROADM
specification. Our modules perform a majority of the digital signal processing
and optical functions in optical interconnects and offer low power consumption,
high density and high speeds at attractive price points. Through the use of
standard interfaces, our modules can be easily integrated with customers'
network equipment. The advanced software in our modules enables increased
configurability and automation, provides insight into network and connection
point characteristics and helps identify network performance problems, all of
which increase flexibility and reduce operating costs.
Revenue from our five largest customers, the mix of which customers varied
across each period, was 76% and 77% during the three months ended March 31, 2020
and 2019, respectively.
Proposed Merger with Cisco Systems
On July 8, 2019, we, Cisco Systems, Inc., a California corporation, or the
Parent, and Amarone Acquisition Corp., a Delaware corporation and a wholly owned
subsidiary of the Parent, or the Merger Sub, entered into an Agreement and Plan
of Merger, or the Merger Agreement, pursuant to which, among other things, the
Merger Sub will be merged with and into Acacia, which we refer to herein as the
Merger, with Acacia surviving the Merger as a wholly owned subsidiary of the
Parent. The Merger Agreement was adopted by our stockholders at a special
meeting held on September 6, 2019. Completion of the Merger is subject to
customary closing conditions, including (i) obtaining certain foreign antitrust
approvals, including in China, (ii) the absence of governmental injunctions or
other legal restraints prohibiting the Merger or imposing certain antitrust
restraints and (iii) the absence of a "Material Adverse Effect," as defined in
the Merger Agreement. We and the Parent have already received antitrust
clearance for the Merger in the United States, Germany and Austria. If the
Merger is completed, each share of our common stock issued and outstanding
immediately prior to the effective time of the Merger, subject to certain
exceptions, will be converted into the right to receive $70.00 in cash. Subject
to the satisfaction of these conditions, the parties expect the Merger to close
in the second half of the Parent's 2020 fiscal year which ends on July 25, 2020.
For additional information related to the Merger Agreement, we refer you to our
Current Report on Form 8-K filed with the Securities and Exchange Commission on
July 9, 2019, which includes the full text of the Merger Agreement as Exhibit
2.1.
During the three months ended March 31, 2020, we recorded acquisition-related
costs of $0.9 million in sales, general and administrative expense within our
condensed consolidated statements of operations.

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Impact of COVID-19
Our global operations expose us to risks associated with public health crises,
epidemics and pandemics, such as the novel coronavirus SARS-CoV-2, and the
coronavirus disease, COVID-19. We cannot at this time predict the impact that
the COVID-19 pandemic will have on our financial condition and operations,
although we are continuing to monitor our supply chain and customer demand
for COVID-19 related changes. In this time of uncertainty, we are staying in
close communication with our customers and other business partners and have
taken steps to mitigate the impact of this dynamic and evolving situation. In
addition, in response to the COVID-19 pandemic, we have modified our business
practices to include company-wide travel and visitor restrictions,
work-from-home policies, social distancing and various other recommended
preventive measures, and may implement further measures that we determine are in
the best interests of our employees, customers, partners, vendors, and
suppliers, or that are required or recommended by federal, state or local
authorities.
While the COVID-19 pandemic did not have a material impact on the Company's
financial results for the three month period ended March 31, 2020, the extent to
which the COVID-19 pandemic could impact the Company's results of operations
going forward depends on future developments that are highly uncertain and
cannot be predicted, including new information that may emerge concerning the
severity of the virus and required or voluntary actions to contain its impact.
Due to the inherent uncertainty of this unprecedented and rapidly evolving
situation, we are unable to predict with any confidence the likely impact of
COVID-19 on our future business, results of operations and financial condition.
Additional information regarding COVID-19 related risks and uncertainties may be
found in the section titled "Risk Factors" under Part II, Item 1A in this
Quarterly Report on Form 10-Q.
Results of Operations
The following tables set forth the components of our condensed consolidated
statements of operations for each of the periods presented and as a percentage
of revenue for those periods. The period-to-period comparison of operating
results is not necessarily indicative of results for future periods.
                                              Three Months Ended March 31,
                                                2020                 2019
                                                     (in thousands)
Consolidated Statement of Operation Data:
Revenue                                   $      125,626       $      105,216
Cost of revenue                                   66,344               55,374
Gross profit                                      59,282               49,842
Operating expenses:
Research and development                          32,095               30,953
Sales, general and administrative                 14,371               15,787
Total operating expenses                          46,466               46,740
Income from operations                            12,816                3,102
Total other income, net                            2,250                2,394
Income before benefit for income taxes            15,066                5,496
Benefit for income taxes                            (578 )             (1,481 )
Net income                                $       15,644       $        6,977





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                                          Three Months Ended March 31,
                                            2020                2019
Revenue                                     100  %              100  %
Cost of revenue                              53  %               53  %
Gross profit                                 47  %               47  %
Operating expenses:
Research and development                     26  %               29  %
Sales, general and administrative            11  %               15  %
Total operating expenses                     37  %               44  %
Income from operations                       10  %                3  %
Total other income, net                       2  %                2  %
Income before benefit for income taxes       12  %                5  %
Benefit for income taxes                      -  %               (1 )%
Net income                                   12  %                7  %



Percentages in the table above are based on actual values. Totals may not sum
due to rounding.
Three Months Ended March 31, 2020 Compared to the Three Months Ended March 31,
2019
Revenue
Revenue by product group and the related changes during the three months ended
March 31, 2020 and 2019 were as follows:
                    Three Months Ended        As a % of        Three Months Ended        As a % of           Change in
                      March 31, 2020        Total Revenue        March 31, 2019        Total Revenue        $           %
                                                            (dollars in thousands)
Embedded modules  $             21,769             17 %      $             17,426             16 %      $  4,343        25 %
Pluggable modules               58,658             47 %                    55,517             53 %         3,141         6 %
Semiconductors                  45,199             36 %                    32,273             31 %        12,926        40 %
Total revenue     $            125,626            100 %      $            105,216            100 %      $ 20,410        19 %



Revenue increased by $20.4 million, or 19%, to $125.6 million in the three
months ended March 31, 2020 from $105.2 million in the three months ended
March 31, 2019. The increase was primarily due to a $12.9 million increase in
sales of our semiconductors, a $4.3 million increase in sales of our embedded
modules and a $3.1 million increase in sales of our pluggable modules. In the
three months ended March 31, 2020 and 2019, we derived 23% and 41%,
respectively, of our revenue from sales to customers with ship-to locations in
China.
Cost of Revenue and Gross Profit

                           Three Months Ended March 31,          Change in
                              2020               2019             $        %
                                        (dollars in thousands)
Cost of revenue         $      66,344       $      55,374     $ 10,970    20 %
Gross profit percentage          47.2 %              47.4 %



Cost of revenue increased $11.0 million, or 20%, to $66.3 million in the three
months ended March 31, 2020 from $55.4 million in the three months
ended March 31, 2019. The increase is primarily attributable to increased sales
volumes.
Our gross profit percentage was generally consistent at 47.2% in the three
months ended March 31, 2020 compared to 47.4% in the three months ended
March 31, 2019.

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Research and Development

                               Three Months Ended March 31,            Change in
                                     2020                  2019         $        %
                                           (dollars in thousands)
Research and development $        32,095                 $ 30,953    $ 1,142    4 %



Research and development expense increased $1.1 million, or 4%, to $32.1 million
in the three months ended March 31, 2020 from $31.0 million in the three months
ended March 31, 2019, primarily due to a $4.3 million increase in
personnel-related and other costs as we continued investing in our product and
technology roadmap and a $1.7 million increase in prototype development costs,
which were partially offset by a $4.9 million decrease in research and
development expenses related to the timing of milestone payments associated with
our development programs.
Sales, General and Administrative

                                       Three Months Ended March 31,              Change in
                                           2020              2019            $              %
                                                         (dollars in thousands)

Sales, general and administrative $ 14,371 $ 15,787 $ (1,416 ) (9 )%





Sales, general and administrative expenses decreased $1.4 million, or 9%, to
$14.4 million in the three months ended March 31, 2020 from $15.8 million in the
three months ended March 31, 2019. This decrease was primarily due to a $2.3
million decrease in professional services expense, which was primarily
attributable to a decrease in estimated legal and settlement costs related to
litigation matters recorded in the three months ended March 31, 2020, partially
offset by a $0.9 million increase in personnel-related and other costs as we
increased sales and customer support staffing and related support resources.
Other Income, Net

                               Three Months Ended March 31,             Change in
                                     2020                   2019        $         %
                                           (dollars in thousands)
Total other income, net $         2,250                   $ 2,394    $ (144 )   (6 )%



Total other income, net, was generally consistent at $2.3 million during the
three months ended March 31, 2020, as compared to $2.4 million during the three
months ended March 31, 2019, and is mainly comprised of interest income from
marketable securities.
Benefit from Income Taxes

                             Three Months Ended March 31,          Change in
                               2020                2019           $        %
                                         (dollars in thousands)
Benefit from income taxes $     (578 )       $      (1,481 )    $ 903    (61 )%
Effective tax rate                (4 )%                (27 )%             23  %



Income tax benefit for the three months ended March 31, 2020 was $0.6 million
compared $1.5 million for the three months ended March 31, 2019. The benefit
from income taxes recorded in the three months ended March 31, 2020 and 2019 was
primarily a result of the recognition of excess tax benefits from the taxable
compensation on share-based awards recognized in the respective periods, as well
as federal and state research and development credits.

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Liquidity and Capital Resources


                                                           Three Months Ended March 31,
                                                               2020             2019
                                                                  (in thousands)
Cash and cash equivalents                                $       86,010     $    73,532
Marketable securities                                           404,231         355,710
Working capital                                                 403,404         367,805
Net cash provided by operating activities                        22,055     

29,328


Net cash provided by (used in) investing activities              27,015         (17,640 )
Net cash provided by financing activities                           323     

1,400





We fund our operations primarily through cash generated from operations. As of
March 31, 2020, we had cash and cash equivalents totaling $86.0 million,
marketable securities of $404.2 million and accounts receivable of $96.8
million.
We believe our existing cash balances and anticipated cash flow from future
operations will be sufficient to meet our working capital and capital
expenditure needs for at least the next 12 months and the foreseeable future.
Our future capital requirements may vary materially from those currently planned
and will depend on many factors, including our rate of revenue growth, the
timing and extent of spending on research and development efforts and other
business initiatives, purchases of capital equipment to support our growth, the
expansion of sales and marketing activities, any expansion of our business
through acquisitions of or investments in complementary products, technologies
or businesses, the use of working capital to purchase additional inventory, the
timing of new product introductions, market acceptance of our products and
overall economic conditions. To the extent that current and anticipated future
sources of liquidity are insufficient to fund our future business activities and
requirements, we may be required to seek additional equity or debt financing. In
the event additional financing is required from outside sources, we may not be
able to raise it on terms acceptable to us or at all.
Operating Activities
Net cash provided by operating activities consists primarily of net income
adjusted for certain non-cash items, including depreciation expense, stock-based
compensation expense, deferred income taxes, non-cash lease expense and other
non-cash benefits, net, as well as the effect of changes in working capital.
Net cash provided by operating activities was $22.1 million in the three months
ended March 31, 2020 as compared to $29.3 million in the three months ended
March 31, 2019. The decrease of $7.3 million was primarily due to an $18.3
million decrease in cash related to changes in operating assets and liabilities,
partially offset by an $8.7 million increase in net income and a $2.4 million
increase in non-cash expense items primarily consisting of stock-based
compensation and deferred income taxes. Changes in cash flows related to
operating assets and liabilities primarily consisted of a $13.0 million decrease
in cash due to the timing of our accounts payable and accrued liability
payments, a $6.3 million decrease in cash due to the timing of our accounts
receivable collections in the three months ended March 31, 2020, a $2.7 million
decrease in cash due to changes in deferred revenue balances and a $2.0 million
decrease in cash due to changes in prepaid and other asset balances, partially
offset by a $5.7 million increase in cash due to a decreased inventory balance.
The ultimate resolution of ongoing litigation matters may have a material
adverse effect on our results of operations and cash flows, potentially in the
near term. In addition, the timing of the final resolution of these proceedings
is uncertain. As of March 31, 2020, we have accrued a total of $20.0 million in
litigation and settlement-related accruals.
Investing Activities
Our investing activities have consisted primarily of purchases, sales and
maturities of marketable securities and purchases of lab, engineering and
computer equipment to support the development of new products and increase our
manufacturing capacity to meet customer demand for existing products. In
addition, our investing activities include expansion of, and certain
improvements to, our leased facilities. We expect that we will continue to
invest in these areas in line with growth in product demand.
Net cash provided by investing activities in the three months ended March 31,
2020 was $27.0 million as compared to net cash used in investing activities of
$17.6 million in the three months ended March 31, 2019. This change was
primarily attributable to a $44.7 million increase in net sales of marketable
securities during the three months ended March 31, 2020.

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Financing Activities
Our financing activities have consisted primarily of proceeds from the issuance
of common stock under our stock-based compensation plans and payments to acquire
treasury stock.
Net cash provided by financing activities during the three months ended
March 31, 2020 was $0.3 million as compared to $1.4 million during the three
months ended March 31, 2019, primarily attributable to a decrease in the number
of stock options exercised.
Contractual Obligations and Commitments
Our principal commitments consist of operating lease payments, purchase
obligations, taxes payable as a result of the U.S. Tax Cuts and Jobs Act, or the
Tax Act, and other tax liabilities arising from the ordinary course of business.
The following table summarizes these contractual obligations at March 31, 2020.
Future events could cause actual payments to differ from these estimates.
                                                             Payments due by period
                                             Less than 1
                                 Total           Year          1-3 Years       3-5 Years       More Than 5 Years
                                                                 (in thousands)
Operating lease liabilities,
including imputed interest    $  27,432     $      3,248     $     8,636     $     8,850     $             6,698
(1)
Purchase obligations (2)         69,465           69,465               -               -                       -
Income taxes payable (3)          7,744              627           2,407           4,710                       -
Unrecognized tax benefits (4)     3,703                -               -               -                       -
Total                         $ 108,344     $     73,340     $    11,043     $    13,560     $             6,698




(1) We lease facilities and equipment under non-cancelable operating lease

agreements. Refer to Note 8, Leases, of the "Notes to Consolidated

Financial Statements" contained in Part I, Item 1 of this Quarterly Report

on Form 10-Q for more information about our leases.

(2) Our purchase obligations primarily consist of outstanding purchase orders

with our contract manufacturers for inventory and other third parties for

the manufacturing of our wafers and semiconductors. Our relationships with

these vendors typically allow for the cancellation of outstanding purchase

orders, but require payments of all expenses incurred through the date of

cancellation. Other obligations include future non-inventory purchases and

commitments related to future fixed asset purchases.

(3) Income taxes payable relates to taxes owed as a result of the one-time

transition tax on earnings of certain foreign subsidiaries that were

previously tax-deferred until the enactment of the Tax Act in December

2017. The Tax Act allows the tax liability to be paid on an installment

basis over eight years. The amount due in less than one year in the table

above represents the transition tax amount owed in the short-term which is


       included in accrued liabilities on our consolidated balance sheet.


(4)    We had $7.2 million of uncertain tax positions as of March 31,

2020. Included in the balance of unrecognized tax benefits as of March 31,

2020 were $3.7 million of tax benefits that, if recognized, would impact

the effective tax rate, which have been accrued for as a long-term

liability on our condensed consolidated balance sheet. We are not able to


       provide reasonably reliable estimates of future payments relating to these
       obligations.


Off-Balance Sheet Arrangements
As of March 31, 2020, we did not have any off-balance sheet arrangements, as
defined in Item 303(a)(4)(ii) of Regulation S-K, such as the use of
unconsolidated subsidiaries, structured finance, special purpose entities or
variable interest entities.
Recently Issued Accounting Pronouncements
Refer to the "Basis of Presentation and Summary of Significant Accounting
Policies" footnote within our condensed consolidated financial statements for
analysis of recent accounting pronouncements that are applicable to our
business.
Critical Accounting Policies and Estimates

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We prepare our condensed consolidated financial statements in accordance with
generally accepted accounting principles in the United States. The preparation
of condensed consolidated financial statements also requires us to make
estimates and assumptions that affect the reported amounts of assets,
liabilities, revenues, costs and expenses and related disclosures. We base our
estimates on historical experience and on various other assumptions that we
believe to be reasonable under the circumstances. Actual results could differ
significantly from the estimates made by our management.
There have been no material changes to our critical accounting policies and
estimates from those disclosed in our Annual Report on Form 10-K for the year
ended December 31, 2019.
ITEM 3. Quantitative and Qualitative Disclosures About Market Risk.
Our exposure to changes in interest rates relates primarily to interest earned
on and the market value of our cash, cash equivalents and marketable
securities. Our cash, cash equivalents and marketable securities consist of bank
deposit accounts, money market funds, U.S. government agency debt securities,
commercial paper, certificates of deposit, asset-backed securities and corporate
debt securities. Our securities with fixed interest rates may have their market
value adversely impacted by a rise in interest rates. As a result, we may suffer
losses in principal if we are forced to sell securities that decline in market
value due to changes in interest rates. However, because we classify our
investments in debt securities as available­for­sale, no gains or losses are
recognized in the condensed consolidated statements of operation unless the
securities' decline in market value is due to credit losses. An immediate 100
basis point change in interest rates would have a $2.1 million effect on the
fair market value of our portfolio as of March 31, 2020. Our investment policy
specifies credit quality standards for our investments and limits the amount of
credit exposure from any single issue, issuer or type of investment.
Our exposure to market risk from changes in foreign currency exchange rates and
inflation has not changed materially from our exposure as of December 31, 2019.
Additional information regarding COVID-19 related risks and uncertainties may be
found in the sections titled "Management's Discussion and Analysis of Financial
Condition and Results of Operations" under Part I, Item 2 and "Risk Factors"
under Part II, Item 1A in this Quarterly Report on Form 10-Q.
ITEM 4. Controls and Procedures.
Evaluation of Disclosure Controls and Procedures. Our management, with the
participation of our principal executive officer and principal financial
officer, has evaluated the effectiveness of our disclosure controls and
procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities
Exchange Act of 1934, as amended (the "Exchange Act")), as of the end of the
period covered by this Quarterly Report on Form 10-Q. Based on such evaluation,
our principal executive officer and principal financial officer have concluded
that as of such date, our disclosure controls and procedures were effective.
Changes in Internal Control Over Financial Reporting. There were no changes in
our internal control over financial reporting (as defined in Rules 13a-15(f) and
15d-15(f) under the Exchange Act) that occurred during the period covered by
this Quarterly Report on Form 10-Q that have materially affected, or are
reasonably likely to materially affect, our internal control over financial
reporting.
COVID-19
In response to COVID-19, we have undertaken measures to protect our employees,
partners and customers, including encouraging employees to work remotely. These
changes have compelled us to modify some of our control procedures, however,
those changes have so far not been material.


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