10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 FORM 10-Q

 QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended

March 31, 2019

or

 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 000-30205

CABOT MICROELECTRONICS CORPORATION

(Exact name of registrant as specified in its charter)

DELAWARE	36-4324765
(State of Incorporation)	(I.R.S. Employer Identification No.)

870 NORTH COMMONS DRIVE	60504
AURORA, ILLINOIS	(Zip Code)
(Address of principal executive offices)

Registrant's telephone number, including area code: (630) 375-6631

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 X NO

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (Section 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

YES X NO

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company.  See definitions of “large accelerated filer,” “accelerated filer,” smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer  Accelerated filer  Non-accelerated filer    Smaller reporting company    Emerging growth company 

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act          ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

YES NO X

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.001 per share	CCMP	NASDAQ

As of April 30, 2019, the Company had 29,061,830 shares of Common Stock, par value $0.001 per share, outstanding.

CABOT MICROELECTRONICS CORPORATION

INDEX

Part I. Financial Information		Page
Item 1.	Unaudited Financial Statements
	Consolidated Statements of Income	3
	Consolidated Statements of Comprehensive Income	4
	Consolidated Balance Sheets	5
	Consolidated Statements of Cash Flows	6
	Consolidated Statements of Changes in Stockholders’ Equity	7
	Notes to the Consolidated Financial Statements	9
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	30
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	55
Item 4.	Controls and Procedures	56
Part II. Other Information
Item 1.	Legal Proceedings	57
Item 1A.	Risk Factors	57
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	66
Item 3.	Defaults Upon Senior Securities	66
Item 4.	Mine Safety Disclosures	66
Item 6.	Exhibits	67
	Signatures	68

2

PART I. FINANCIAL INFORMATION

ITEM 1.

CABOT MICROELECTRONICS CORPORATION

CONSOLIDATED STATEMENTS OF INCOME

(Unaudited and in thousands, except per share amounts)

	Three Months Ended March 31,						Six Months Ended March 31,
	2019			2018			2019			2018
Revenue	$	265,391		$	142,978		$	487,169		$	282,957
Cost of sales		150,571			67,933			273,016			133,898
Gross profit		114,820			75,045			214,153			149,059
Operating expenses:
Research, development and technical		12,778			13,368			26,818			25,519
Selling, general and administrative		50,328			24,589			111,456			49,340
Total operating expenses		63,106			37,957			138,274			74,859
Operating income		51,714			37,088			75,879			74,200
Interest expense		13,331			1,158			20,221			2,290
Interest income		568			1,156			1,587			2,107
Other income (expense), net		(1,014	)		(94	)		(2,425	)		(373	)
Income before income taxes		37,937			36,992			54,820			73,644
Provision for income taxes		10,800			7,255			14,240			46,990
Net income	$	27,137		$	29,737		$	40,580		$	26,654
Basic earnings per share (in dollars per share)	$	0.94		$	1.16		$	1.45		$	1.05
Weighted average basic shares outstanding		28,998			25,593			28,066			25,474
Diluted earnings per share (in dollars per share)	$	0.92		$	1.14		$	1.42		$	1.02
Weighted average diluted shares outstanding		29,479			26,161			28,607			26,076

The accompanying notes are an integral part of these Consolidated Financial Statements.

3

CABOT MICROELECTRONICS CORPORATION

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited and in thousands)

	Three Months Ended March 31,						Six Months Ended March 31,
	2019			2018			2019			2018
Net income	$	27,137		$	29,737		$	40,580		$	26,654
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments		(992	)		3,961			1,433			11,105
Net unrealized gain on available-for-sale securities		-			46			-			-
Minimum pension liability adjustment		251			-			-			-
Net unrealized gain (loss) on cash flow hedges		(6,474	)		(52	)		(6,474	)		147
Other comprehensive income (loss), net of tax		(7,215	)		3,955			(5,041	)		11,252
Comprehensive income	$	19,922		$	33,692		$	35,539		$	37,906

The accompanying notes are an integral part of these Consolidated Financial Statements.

4

CABOT MICROELECTRONICS CORPORATION

CONSOLIDATED BALANCE SHEETS

(Unaudited and in thousands, except share amounts)

	March 31, 2019			September 30, 2018
ASSETS
Current assets:
Cash and cash equivalents	$	192,260		$	352,921
Accounts receivable, less allowance for doubtful accounts of $1,704 at March 31, 2019, and $1,900 at September 30, 2018		131,880			75,886
Inventories		147,324			71,926
Prepaid expenses and other current assets		30,551			22,048
Total current assets		502,015			522,781
Property, plant and equipment, net		263,556			111,403
Goodwill		705,426			101,083
Other intangible assets, net		854,378			35,202
Deferred income taxes		5,498			5,840
Other long-term assets		6,215			4,664
Total assets	$	2,337,088		$	780,973
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	47,330		$	18,171
Current portion of long-term debt		13,313			-
Accrued expenses, income taxes payable and other current liabilities		86,913			82,983
Total current liabilities		147,556			101,154
Long-term debt, net of current portion, less prepaid debt issuance cost of $19,411 at March 31, 2019		987,276			-
Deferred income taxes		150,575			81
Other long-term liabilities		25,814			13,046
Total liabilities		1,311,221			114,281
Commitments and contingencies (Note 12)
Stockholders’ equity:
Common Stock: Authorized: 200,000,000 shares, $0.001 par value; Issued: 39,446,709 shares at March 31, 2019, and 35,862,465 shares at September 30, 2018		39			36
Capital in excess of par value of common stock		975,612			622,498
Retained earnings		487,467			471,673
Accumulated other comprehensive income		(502	)		4,539
Treasury stock at cost, 10,401,574 shares at March 31, 2019, and 10,356,147 shares at September 30, 2018		(436,749	)		(432,054	)
Total stockholders’ equity		1,025,867			666,692
Total liabilities and stockholders’ equity	$	2,337,088		$	780,973

The accompanying notes are an integral part of these Consolidated Financial Statements.

5

CABOT MICROELECTRONICS CORPORATION

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited and amounts in thousands)

	Six Months Ended March 31,
	2019			2018
Cash flows from operating activities:
Net income	$	40,580		$	26,654
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		43,889			13,138
Provision for doubtful accounts		(314	)		5
Share-based compensation expense		11,708			10,082
Deemed repatriation transition tax		-			24,641
Deferred income tax (expense) benefit		(13,811	)		15,291
Non-cash foreign exchange (gain) loss		354			(11	)
Loss (Gain) on disposal of property, plant and equipment		(58	)		18
Realized loss on the sale of available-for-sale securities		-			118
Non-cash charge on inventory step up of acquired inventory sold		14,827			-
Amortization of debt issuance costs		1,286			63
(Gain) on sale of assets		-			(956	)
Other		2,337			2,125
Changes in operating assets and liabilities:
Accounts receivable		9,445			(4,370	)
Inventories		(21,100	)		(3,771	)
Prepaid expenses and other assets		5,415			(5,503	)
Accounts payable		(429	)		(407	)
Accrued expenses, income taxes payable and other liabilities		(40,601	)		(9,983	)
Net cash provided by operating activities		53,528			67,134
Cash flows from investing activities:
Additions to property, plant and equipment		(19,472	)		(8,804	)
Acquisition of a business, net of cash acquired		(1,182,186	)		-
Cash settlement of life insurance policy		3,959			-
Proceeds from the sale of assets		1,210			2,999
Purchases of available-for-sale securities		-			(50,673	)
Proceeds from the sale and maturities of available-for-sale securities		-			50,548
Net cash used in investing activities		(1,196,489	)		(5,930	)
Cash flows from financing activities:
Repayment of long-term debt		(45,000	)		(6,563	)
Repurchases of common stock		(4,695	)		(9,937	)
Proceeds from issuance of long-term debt		1,062,337			-
Debt issuance costs		(18,745	)		-
Proceeds from issuance of stock		10,361			18,089
Dividends paid		(21,934	)		(10,228	)
Net cash provided by (used in) financing activities		982,324			(8,639	)
Effect of exchange rate changes on cash		(24	)		10,979
Decrease in cash and cash equivalents		(160,661	)		63,544
Cash and cash equivalents at beginning of period		352,921			397,890
Cash and cash equivalents at end of period	$	192,260		$	461,434
Supplemental disclosure of non-cash investing and financing activities:
Purchases of property, plant and equipment in accrued liabilities and accounts payable at the end of the period	$	2,425		$	2,068
Equity consideration related to the acquisition of KMG Chemicals, Inc		331,048			-

The accompanying notes are an integral part of these Consolidated Financial Statements.

6

CABOT MICROELECTRONICS CORPORATION

CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS’ EQUITY

(Unaudited and amounts in thousands)

	Common Stock		Capital In Excess Of Par		Retained Earnings			Accumulated Other Comprehensive Income			Treasury Stock			Total
Balance at September 30, 2018	$	36	$	622,498	$	471,673		$	4,539		$	(432,054	)	$	666,692
Share-based compensation expense				8,170											8,170
Repurchases of common stock - other, at cost												(4,001	)		(4,001	)
Exercise of stock options				3,097											3,097
Issuance of common stock in connection with acquisition of KMG Chemicals, Inc.		3		331,045											331,048
Issuance of Cabot Microelectronics restricted stock under Deposit Share Program				75											75
Net income						13,443									13,443
Dividends ($0.40 per share in dollars)						(11,598	)								(11,598	)
Effect of the adoption of the revenue recognition accounting standards						(933	)								(933	)
Foreign currency translation adjustment									2,425						2,425
Minimum pension liability adjustment									(251	)					(251	)
Balance at December 31, 2018		39		964,885		472,585			6,713			(436,055	)		1,008,167
Share-based compensation expense				3,538											3,538
Repurchases of common stock - other, at cost												(694	)		(694	)
Exercise of stock options				5,080											5,080
Issuance of Cabot Microelectronics stock under Employee Stock Purchase Plan				2,109											2,109
Net income						27,137									27,137
Dividends ($0.42 per share in dollars)						(12,255	)								(12,255	)
Foreign currency translation adjustment									(992	)					(992	)
Interest rate swap									(6,474	)					(6,474	)
Minimum pension liability adjustment									251						251
Balance at March 31, 2019	$	39	$	975,612	$	487,467		$	(502	)	$	(436,749	)	$	1,025,867

The accompanying notes are an integral part of these Consolidated Financial Statements.

7

CABOT MICROELECTRONICS CORPORATION

CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS’ EQUITY

(Unaudited and amounts in thousands)

	Common Stock		Capital In Excess Of Par		Retained Earnings			Accumulated Other Comprehensive Income			Treasury Stock			Total
Balance at September 30, 2017	$	35	$	580,938	$	397,881		$	3,949		$	(387,766	)	$	595,037
Share-based compensation expense				5,881											5,881
Repurchases of common stock under share repurchase plans, at cost												(1,591	)		(1,591	)
Repurchases of common stock - other, at cost												(3,160	)		(3,160	)
Exercise of stock options				6,139											6,139
Issuance of Cabot Microelectronics restricted stock under Deposit Share Program				300											300
Net loss						(3,083	)								(3,083	)
Dividends ($0.20 per share in dollars)						(5,153	)								(5,153	)
Foreign currency translation adjustment									7,144						7,144
Interest rate swaps									199						199
Unrealized loss in short term available-for-sale securities									(46	)					(46	)
Balance at December 31, 2017		35		593,258		389,645			11,246			(392,517	)		601,667
Share-based compensation expense				4,223											4,223
Repurchases of common stock under share repurchase plans, at cost												(5,005	)		(5,005	)
Repurchases of common stock - other, at cost												(300	)		(300	)
Exercise of stock options		1		9,611											9,612
Issuance of Cabot Microelectronics stock under Employee Stock Purchase Plan				2,012											2,012
Net income						29,737									29,737
Dividends ($0.40 per share in dollars)						(10,390	)								(10,390	)
Foreign currency translation adjustment									3,961						3,961
Interest rate swaps									(52	)					(52	)
Sale of short term available-for-sale securities									46						46
Balance at March 31, 2018	$	36	$	609,104	$	408,992		$	15,201		$	(397,822	)	$	635,511

The accompanying notes are an integral part of these Consolidated Financial Statements.

8

CABOT MICROELECTRONICS CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited and in thousands, except share and per share amounts)

1. BACKGROUND AND BASIS OF PRESENTATION

Cabot Microelectronics Corporation (“Cabot Microelectronics”, “the Company”, “us”, “we”, or “our”') is a leading global supplier of consumable materials to semiconductor manufacturers and pipeline operators.  On November 15, 2018 (“Acquisition Date”), we completed our acquisition of KMG Chemicals, Inc. (“KMG”), which produces and distributes specialty chemicals and performance materials for the semiconductor, industrial wood preservation, pipeline and energy industries (“Acquisition”).  The Acquisition has extended and strengthened our position as one of the leading suppliers of consumable materials to the semiconductor industry and expands our portfolio with the addition of KMG’s businesses, which we believe will enable us to be a leading global provider of performance products and services to the pipeline operations and energy industries. The Consolidated Financial Statements included in this Report on Form 10-Q include the financial results of KMG from the Acquisition Date. Subsequent to the Acquisition, we have operated our business within two reportable segments: Electronic Materials and Performance Materials. The Electronic Materials segment consists of our heritage CMP slurries and polishing pads businesses, as well as the KMG electronic chemicals business.  The Performance Materials segment includes KMG’s heritage pipeline performance and wood treatment businesses, and Cabot Microelectronics’ heritage QED business. For additional information, refer to Part 1, Item 1, “Business”, in our and KMG’s Annual Reports on Form 10-K for the fiscal year ended September 30, 2018 and July 31, 2018, respectively.

The unaudited Consolidated Financial Statements have been prepared by Cabot Microelectronics pursuant to the rules of the Securities and Exchange Commission (SEC) and accounting principles generally accepted in the United States of America (U.S. GAAP).  In the opinion of management, these unaudited Consolidated Financial Statements include all adjustments, consisting of normal recurring adjustments, necessary for the fair statement of Cabot Microelectronics’ financial position as of March 31, 2019, cash flows for the six months ended March 31, 2019 and March 31, 2018, and results of operations for the three and six months ended March 31, 2019 and March 31, 2018.  The Consolidated Balance Sheets as of September 30, 2018 were derived from audited financial statements. The results of operations for the three and six months ended March 31, 2019 may not be indicative of results to be expected for future periods, including the fiscal year ending September 30, 2019.  Certain prior period amounts have been reclassified to conform to the current period presentation.  This Report on Form 10-Q does not contain all of the footnote disclosures from the annual financial statements and should be read in conjunction with the Consolidated Financial Statements and related notes thereto included in Cabot Microelectronics’ Annual Report on Form 10-K for the fiscal year ended September 30, 2018.

The Consolidated Financial Statements include the accounts of Cabot Microelectronics and its subsidiaries. All intercompany transactions and balances between the companies have been eliminated as of March 31, 2019.

USE OF ESTIMATES

The preparation of financial statements and related disclosures in conformity with U.S. GAAP requires management to make judgments, assumptions and estimates that affect the amounts reported in the Consolidated Financial Statements and accompanying notes. The accounting estimates that require management's most difficult and subjective judgments include, but are not limited to, those estimates related to bad debt expense, inventory valuation, impairment of long-lived assets and investments, business combinations, goodwill, other intangible assets, share-based compensation, income taxes and contingencies. We base our estimates on historical experience, current conditions and on various other assumptions that we believe are reasonable under the circumstances. However, future events are subject to change and estimates and judgments routinely require adjustment. Actual results may differ from these estimates under different assumptions or conditions.

9

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS

Significant Accounting Policies and Estimates

Except for the discussion on revenue recognition below, no material changes have been made to the Company’s significant accounting policies disclosed in Note 2 of the Notes to the Consolidated Financial Statements in our Annual Report on Form 10-K for the fiscal year ended September 30, 2018.

REVENUE RECOGNITION

As of October 1, 2018, the Company began applying the provisions of Accounting Standards Codification 606-10, “Revenue from Contracts with Customers” (“ASC 606”), and all related appropriate guidance using the modified retrospective method applied to those contracts which were not completed as of October 1, 2018.  The Company recognizes revenue under the core principle of depicting the transfer of control to the Company’s customers in an amount reflecting the consideration to which the Company expects to be entitled. In order to achieve that core principle, the Company applies the following five step approach: (1) identify the contract with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when a performance obligation is satisfied.

Upon adoption of ASC 606 we recognized a $933 decrease to the opening balance of retained earnings, net of tax, due to the cumulative impact of adopting the new revenue standards. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods.  The Company changed its accounting policy for revenue recognition for customer incentives that provide free products and tiered pricing.  For free products, the new revenue standards require that a portion of the transaction price be allocated to the free product and deferred until the product has been delivered.  We previously accrued for undelivered free product as a charge to cost of sales.  In prior fiscal years, in accordance with ASC 605, we did not consider prospective tiered pricing to represent a material right.

The cumulative effect of the changes made to our Consolidated Balance Sheet as of October 1, 2018 for the adoption of the new revenue standardswas as follows:

	Balance at September 30, 2018		Adjustments Due to ASC 606			Balance at October 1, 2018
Deferred income tax assets	$	5,840	$	261		$	6,101
Accrued expenses, income taxes payable and other current liabilities		82,983		(47	)		82,936
Other long-term liabilities		13,046		1,241			14,287
Retained earnings	$	471,673	$	(933	)	$	470,740

We have determined that the effect of applying the new revenue standards during the three and six months ended March 31, 2019 was immaterial to our financial statements compared to revenue guidance in effect before the adoption of the new revenue standards.  As a result, for the three and six months ended March 31, 2019, we are not disclosing the quantitative amount by which each financial statement line item is affected by the application of the new revenue standards.

As part of the adoption of ASU 606, the Company elected to use certain allowed practical expedients. For the Company’s contracts that have an original duration of one year or less as of the adoption date, the Company uses the practical expedient applicable to such contracts and does not consider the time value of money. Further, because of the short duration of these contracts, the Company has not disclosed the transaction price for the future performance obligations as of the end of each reporting period for contracts having an expected duration of one year or less.  See Note 3 of this Report on Form 10-Q for disaggregated revenue, the reconciliation of contract balances and transaction price allocation to remaining performance obligations for contracts expected to remain effective beyond one year.

10

Performance Obligations and Material Rights

At contract inception, the Company assesses the goods and services promised in its contracts with customers and identifies a performance obligation for each material promise to the customer.  A performance obligation is a promise in a contract to transfer a distinct good or service, or a bundle of goods or services, to the customer, and is the unit of accounting under ASC 606. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. A majority of the Company’s contracts have a single performance obligation which represents, in most cases, the products, equipment or services being sold to the customer. Some contracts include multiple performance obligations including prospective tiered price discounts or delivery of free product that we have concluded represents a material right. Contracts with prospective tiered price discounts require judgment in determining if that discount represents a material right.

Contracts vary in length and payment terms vary by the type and location of the Company’s customers and the products or services offered. However, the period of time between invoicing and when payment is due is typically not significant and has no significant financing components.  Customers pay in accordance with negotiated terms upon receipt of goods or completion of services.  For these contracts, the transaction price is determined upon establishment of the contract that contains the final terms of the sale, including the description, quantity, and price of goods or services purchased.  In certain instances, we receive consideration from a customer prior to transferring goods or services to the customer under the terms of a sales contract.  In such cases, we record deferred revenue until the performance obligation is satisfied, which represents a contract liability, and is included in the contract liabilities discussed in Note 3 of this Form 10-Q.

The Company recognizes revenue related to product sales at a point in time following the transfer of control of such products to the customer, which generally occurs upon shipment, or delivery depending on the terms of the underlying contracts. The Company considers control to have transferred upon shipment or delivery because the Company has a present right to payment at that time, the customer has legal title to the asset, the Company has transferred physical possession of the asset, and the customer has significant risks and rewards of ownership of the asset.  Revenue is recognized on consignment sales when control transfers to the customer, generally at the point of customer usage of the product. The Company also records revenue for services provided to the pipeline and oilfield energy industries.  These services include preventive maintenance, repair and specialized isolation sealing on pipelines and training. Revenue is recorded at a point in time when the services are completed as this is when right to payment and customer acceptance occurs.

For sales contracts that contain multiple performance obligations, the Company allocates the transaction price to each performance obligation identified in the contract based on relative standalone selling prices or estimates of such prices.  Standalone selling price, once established, is then used to allocate total consideration proportionally to the various performance obligations within a contract. Most contracts where we have determined there to be multiple performance obligations relate to where we have identified a material right to exist such that we provide prospective tiered pricing discounts or free product. When we invoice for products shipped under these contracts, we defer the revenue associated with these rights on the balance sheet as a contract liability. Revenue is recognized when the customer exercises the option to purchase goods at a discount in the case of the prospective tiered pricing discounts or when we ship the free product.

Variable Consideration

The primary type of variable consideration present in the Company’s contracts are rebates and early payment discounts, both of which are immaterial. Early payment discounts are offered on a limited basis and are not significant.  The Company also offers rebates based upon cumulative volume of purchases within a quarter and accrues for the rebate obligation within the quarter that the rebate is earned.  ASC 606 did not change the accounting for rebates under ASC 605.

Costs to Obtain and Fulfill a Contract

For certain contracts within the Performance Materials segment, commissions are paid to sales agents based upon a percentage of end-customer invoice value. Agents are paid the commissions after funds are received by the Company from its customers.  Under ASC 340, sales commissions are required to be capitalized and expensed over the associated contract period.  However, as a practical expedient, the Company does not capitalize commissions as the associated contracts are generally one year or less in duration. For shipping and handling activities performed after a customer obtains control of the goods, the Company has elected to account for these costs as activities to fulfill the promise to transfer the goods and included in cost of sales.

11

EFFECTS OF RECENT ACCOUNTING PRONOUNCEMENTS

In February 2016, the FASB issued ASU No. 2016-02, "Leases" (Topic 842).  The provisions of ASU 2016-02 require a dual approach for lessee accounting under which a lessee would recognize a right-of-use asset and a corresponding lease liability.  Leases will be classified as either finance or operating leases.  For finance leases, a lessee will recognize interest expense and amortization of the right-of-use asset, and for operating leases, the lessee will recognize a straight-line total lease expense.  The guidance also requires qualitative and specific quantitative disclosures to supplement the amounts recorded in the financial statements, to afford better understanding of an entity's leasing activities, including any significant judgments and estimates.   The guidance was amended through various ASU's subsequent to ASU 2016-02, all of which will be effective for us beginning October 1, 2019, but early adoption is permitted.  We are currently evaluating the impact of implementation of this standard on our financial statements.

In June 2016, the FASB issued ASU No. 2016-13, "Measurement of Credit Losses on Financial Instruments" (Topic 326). The provisions of this standard require financial assets measured at amortized cost to be presented at the net amount expected to be collected. An allowance account would be established to present the net carrying value at the amount expected to be collected. ASU 2016-13 also provides that credit losses relating to available-for-sale debt securities should be recorded through an allowance for credit losses. ASU 2016-13 will be effective for us beginning October 1, 2020, but early adoption is permitted as of October 1, 2019. We are currently evaluating the impact of implementation of this standard on our financial statements.

In March 2017, the FASB issued ASU No. 2017-07 "Improving the Presentation of Net Period Pension Cost and Net Period Postretirement Benefit Cost" (Topic 715). The provisions of ASU 2017-07 provided specific guidance on the presentation of the components of net benefit cost.  We adopted this standard ASU 2017-07 effective October 1, 2018 and applied it retrospectively. Pursuant to the adoption, net service costs are recorded as fringe benefit expense under cost of sales and operating expenses, and all other costs are recorded in the Other income (expense), net in our Consolidated Statements of Income. The impact of the retrospective adoption in fiscal 2018 is not material.

In May 2017, the FASB issued ASU No. 2017-09 "Scope of Modification Accounting" (Topic 718). The provisions of ASU 2017-09 provide specific guidance about which changes to the term or conditions of a share-based payment require an entity to apply modification accounting.  We adopted ASU 2017-09 effective October 1, 2018 and will apply this new standard to the share-based compensation awards, to the extent modified.

In August 2017, the FASB issued ASU No. 2017-12 "Derivatives and Hedging" (Topic 815). The provisions of this standard amend the hedge accounting model in ASC 815 to expand an entity's ability to hedge nonfinancial and financial risk components, reduce complexity in fair value hedges of interest rate risk, eliminate the requirement to separately measure and report hedge ineffectiveness, and generally require the entire change in the fair value of a hedging instrument to be presented in the same income statement line as the hedged item. The guidance also eases certain documentation and assessment requirements and modifies the accounting for components excluded from the assessment of hedge effectiveness.  We early adopted this guidance effective January 1, 2019, and we did not have any hedges that existed as of the initial application date.  We applied the new guidance to the interest rate swap that we entered into during our second quarter of fiscal 2019. Pursuant to the guidance, we performed initial quantitative hedge effectiveness testing upon the hedge inception, and determined the hedge to be highly effective.  Therefore, unrealized changes in fair value are recorded in other comprehensive income.  In addition, we reclassify the realized gains and losses out of other comprehensive income, and into interest expense in our Consolidated Statements of Income, which is the same financial statement line as the hedged item.  We will perform subsequent assessments of hedge effectiveness qualitatively on a quarterly basis.

In February 2018, the FASB issued ASU No. 2018-02 "Income Statement – Reporting Comprehensive Income (Topic 220)".  The amendments in this standard allow a company to reclassify the stranded tax effects resulting from the Tax Cuts and Jobs Act (the "Tax Act") from accumulated other comprehensive income to retained earnings. ASU 2018-02 will be effective for us beginning October 1, 2019, but early adoption is permitted. We are currently evaluating the impact of implementation of this standard on our financial statements.

In June 2018, the FASB issued ASU No. 2018-07 " Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting".  The ASU simplified the accounting for share-based payments granted to nonemployees for goods and services, therefore guidance on such payments to nonemployees would be mostly aligned with the requirements for share-based payments granted to employees. ASU 2018-07 will be effective for us beginning October 1, 2019, but early adoption is permitted (but no earlier than the adoption date of Topic 606). We are currently evaluating the impact of implementation of this standard on our financial statements.

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In August 2018, the FASB issued ASU No. 2018-13 " Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement".  The ASU provides specific guidance on various disclosure requirements in Topic 820, including removal, modification and addition to current disclosure requirements. ASU 2018-13 will be effective for us beginning October 1, 2020, but early adoption is permitted. We are currently evaluating the impact of implementation of this standard on our disclosures.

In August 2018, the FASB issued ASU No. 2018-15 " Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force)".  The ASU Requires an entity (customer) in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which implementation costs to capitalize as an asset related to the service contract and which costs to expense. ASU 2018-15 will be effective for us beginning October 1, 2020, but early adoption is permitted. We are currently evaluating the impact of implementation of this standard on our financial statements.

3.  REVENUE FROM CONTRACTS WITH CUSTOMERS

Disaggregation of Revenue

The Company disaggregates revenue by product area and segment as it best depicts the nature and amount of the Company’s revenue.

The following table shows revenue generated by product area during the three and six months ended March 31, 2019 and 2018:

	Three Months Ended March 31,				Six Months Ended March 31,
	2019		2018		2019		2018
Revenue:
Electronic Materials:
CMP Slurries	$	110,299	$	115,086	$	236,627	$	229,522
Electronic Chemicals		78,549		-		118,371		-
CMP Pads		23,998		21,017		48,464		39,895
Total Electronic Materials		212,846		136,103		403,462		269,417
Performance Materials		52,545		6,875		83,707		13,540
Total revenue	$	265,391	$	142,978	$	487,169	$	282,957

Reconciliation of Contract Liability Balances

The following table provides information about contract liability balances:

	March 31, 2019		October 1, 2018
Contract liabilities (current)	$	3,611	$	5,310
Contract liabilities (noncurrent)		1,414		1,239

The contract liability balances as of October 1, 2018 in the table above include the amounts recorded upon the adoption of ASC 606.  At March 31, 2019, the current portion of contract liabilities of $3,611 is included in accrued liabilities, taxes payable and other current liabilities and the noncurrent portion of $1,414 is included in other long-term liabilities in the Consolidated Balance Sheets.  The amount of revenue recognized during the three and six months ended March 31, 2019 that was included in the opening current contract liability balances in our Performance Materials segment were  $2,317 and $4,160, respectively.  The amount of revenue recognized during the three and six months ended March 31, 2019 that was included in our opening contract liability balances in our Electronic Materials segment was not material.

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Transaction Price Allocated to Remaining Performance Obligations

The table below discloses (1) the aggregate amount of the transaction price allocated to performance obligations that are unsatisfied (or partially unsatisfied) as of the end of the reporting period for contracts with an original duration of greater than one year and (2) when the Company expects to recognize this revenue.

	Less Than 1 Year			1-3 Years			3-5 Years			Total
Revenue expected to be recognized on contract liability amounts as of March 31, 2019		$	87		$	1,085		$	329		$	1,501

4. BUSINESS COMBINATION

On the Acquisition Date, the Company completed its acquisition of 100% of the outstanding stock of KMG, which was a publicly held company headquartered in Fort Worth, Texas. KMG specializes in producing and distributing electronic chemicals for the semiconductor industry and performance materials for the pipeline, energy, and industrial wood preservation industries. We acquired KMG to extend and strengthen our position as one of the leading suppliers of consumable materials to the semiconductor industry and to expand our portfolio with the addition of KMG’s performance materials business, which we believe will enable us to be a leading global provider of performance products and services to the pipeline operations and energy industries. The purchase consideration was $1,513,235, including consideration transferred of $1,536,452, less cash acquired of $23,217. The consideration was comprised of cash consideration to KMG common shareholders and equity award holders, stock consideration to KMG common shareholders and equity award holders, and cash consideration in the form of the retirement of KMG’s preexisting debt obligations.  Under the terms of the definitive agreement to acquire KMG, each share of KMG common stock was converted into the right to receive $55.65 in cash and 0.2000 of a share of Cabot Microelectronics common stock. As a result, we issued 3,237,005 shares of our common stock to KMG’s common stockholders, with a stock price of $102.27 on the Acquisition Date. In connection with the Acquisition, we entered into a credit agreement (the “Credit Agreement”), which provided us with a seven-year, $1,065,000 term loan facility (the “Term Loan Facility”), which we drew on the Acquisition Date to fund the Acquisition along with cash on hand, and a five-year, $200,000 revolving credit facility (the “Revolving Credit Facility”), which has not been drawn. In connection with the borrowing, we incurred $21,408 in debt issuance costs and original issue discount fees, $859 of which relates to the Revolving Credit Facility and is recorded as a prepaid asset, and the remaining $20,549 in debt issuance costs relates to the Term Loan Facility and is presented as a reduction of long-term debt. These debt issuance costs are amortized and recorded in Interest expense in the Consolidated Statements of Income over the life of the Revolving Credit Facility and Term Loan Facility, respectively. See below for a summary of the different components that comprise the total consideration.

	Amount
Total cash consideration paid for KMG outstanding common stock and equity awards	$	900,756
Cash provided to payoff KMG debt		304,648
Total cash consideration paid		1,205,404
Fair value of Cabot Microelectronics common stock issued for KMG outstanding common stock and equity awards		331,048
Total consideration transferred	$	1,536,452

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The following table summarizes the preliminary allocation of fair values of assets acquired and liabilities assumed as of Acquisition Date:

Cash	$	23,217
Accounts receivable		64,711
Inventories		68,963
Prepaid expenses and other current assets		14,798
Property, plant and equipment		149,504
Intangible assets		844,800
Other long-term assets		6,208
Accounts payable		(28,894	)
Accrued expenses and other current liabilities		(43,451	)
Deferred income taxes liabilities		(164,469	)
Other long-term liabilities		(3,754	)
Total identifiable net assets acquired		931,633
Goodwill		604,819
Total consideration transferred	$	1,536,452

The acquisition was accounted for using the acquisition method of accounting. Tangible and identifiable intangible assets acquired and liabilities assumed are recorded at fair value as of the Acquisition Date. These valuations are preliminary based on the information currently available, and the expectations and assumptions that have been deemed reasonable by the Company’s management.  The Company has not finalized the fair value determinations of the assets acquired and liabilities assumed and expects to finalize as soon as practicable, but not later than one-year from the Acquisition Date.  As a result, certain adjustments have been made and will continue to be made to the Company’s Consolidated Balance Sheet and Statements of Income.

The fair values of identifiable assets and liabilities acquired were developed with the assistance of a third-party valuation firm. The fair value of acquired property, plant and equipment is primarily valued at its “value-in-use.” The fair value of acquired identifiable intangible assets was determined using the “income approach” on an individual asset basis. The key assumptions used in the calculation of the discounted cash flows include projected revenue, gross margin, operating expenses, discount rate and customer attrition.  The valuations and the underlying assumptions have been deemed reasonable by the Company’s management. There are inherent uncertainties and management judgment required in these determinations.

The following table sets forth the components of identifiable intangible assets acquired and their estimated useful lives as of the Acquisition Date:

	Fair Value		Estimated Useful Life (years)
Customer relationships	$	704,000		15-20
Technology and know-how		85,500		9-11
Trade name - Flowchem		46,000	Indefinite
Trade name - all other		7,000		1-15
EPA product registration rights		2,300		15
Total intangible assets	$	844,800

Customer relationships represent the estimated fair value of the underlying relationships and agreements with KMG’s customers and are being amortized on an accelerated basis in order for the expense to most accurately match the periods of highest cash flows attributable to the identified relationships. Technology and know-how represent the estimated fair value of KMG’s technology, processes and knowledge regarding its product offerings, and are being amortized on a straight-line basis. Trade names represents the estimated fair value of the brand and name recognition associated with the marketing of KMG’s product offerings and are being amortized on a straight-line basis, except for the Flowchem trade name, which we believe has an indefinite life. These intangible assets are capitalized and accounted for as indefinite-lived intangible assets and will be subject to impairment testing. The intangible assets subject to amortization have a weighted average useful life of 17.9 years.

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The excess of consideration transferred over the fair value of net assets acquired was recorded as goodwill, and is not deductible for income tax purposes. The goodwill is primarily attributable to anticipated revenue growth from the combined company product portfolio, expected synergies of the combined company, and the assembled workforce of KMG. The preliminary allocation of goodwill to each of the Electronic Materials and Performance Materials segments as a result of this Acquisition was $262,746 and $342,073, respectively.

For the three and six month ended March 31, 2019, we recorded $2,904 and $30,198 in acquisition and integration-related expenses, including transaction costs, stock compensation expense, severance and retention costs. These items are included within Selling, general and administrative in the Consolidated Statements of Income. In the same three and six month ended March 31, 2019, we also recorded a charge of $4,566 and $14,827 related to the fair value write-up of acquired inventory sold, respectively, which is included in Cost of sales in the Consolidated Statements of Income.

KMG’s results of operations have been included in our unaudited Consolidated Statements of Income and Consolidated Statements of Comprehensive Income from the Acquisition Date. Net sales of the acquired KMG business since the Acquisition Date through March 31, 2019 were $185,127. KMG’s net loss since the Acquisition Date was $5,561, which includes $19,996 of acquisition related costs and a $14,827 charge for fair value write-up of inventory sold. Further, additional amortization and depreciation expense associated with recording KMG’s net assets at fair value decreased KMG’s net income post-Acquisition.

The following unaudited supplemental pro forma information summarizes the combined results of operations for Cabot Microelectronics and KMG as if the Acquisition had occurred on October 1, 2017.

	Three Months Ended March 31,				Six Months Ended March 31,
	2019		2018		2019		2018
Revenues	$	265,391	$	259,372	$	549,147	$	512,105
Net income (loss)		28,056		24,902		66,873		(38,262	)
Earnings per share - basic	$	0.97	$	0.86	$	2.32	$	(1.33	)
Earnings per share - diluted	$	0.95	$	0.85	$	2.27	$	(1.33	)

The following costs are included in the three and six months ended March 31, 2018:

● Non-recurring transaction costs of $580 and $30,610, respectively.

● Non-recurring transaction-related employee costs, such as accelerated stock compensation expense, retention and severance    expense of $460 and $35,601, respectively.

● Non-recurring charge for fair value write-up of inventory sold of $1,045 and $14,859, respectively.

The historical financial information has been adjusted byapplying the Company’s accounting policies and giving effect to the pro forma adjustments, which consist of (i) amortization expense associated with identified intangible assets; (ii) depreciation of fixed asset step-up; (iii) accretion of inventory step-up value; (iv) the elimination of interest expense on pre-acquisition KMG debt and replacement of interest expense related to the acquisition-related financing; (v) transaction-related costs; (vi) accelerated share-based compensation expense; (vii) retention and severance expense incurred as a direct result of the acquisition; and (viii) an adjustment to tax-effect the aforementioned unaudited pro forma adjustments using an estimated weighted-average effective income tax rate of each entity and the jurisdictions to which the above adjustments relate. The pro forma consolidated results are not necessarily indicative of what the consolidated results actually would have been had the Acquisition been completed on October 1, 2017. The pro forma consolidated results do not purport to project future results of combined operations, nor do they reflect the expected realization of any revenue or cost synergies associated with the Acquisition.

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5. FAIR VALUE OF FINANCIAL INSTRUMENTS

Fair value is defined as the price that would be received from the sale of 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 Financial Accounting Standards Board (“FASB”) established a three-level hierarchy for disclosure based on the extent and level of judgment used to estimate fair value.  Level 1 inputs consist of valuations based on quoted market prices in active markets for identical assets or liabilities.  Level 2 inputs consist of valuations based on quoted prices for similar assets or liabilities, quoted prices for identical assets or liabilities in an inactive market, or other observable inputs.  Level 3 inputs consist of valuations based on unobservable inputs that are supported by little or no market activity.

The following table presents financial instruments, other than long-term debt, that we measured at fair value on a recurring basis at March 31, 2019 and September 30, 2018.  See Note 10 for a detailed discussion of our long-term debt.  We have classified the following assets and liabilities in accordance with the fair value hierarchy set forth in the applicable standards.  In instances where the inputs used to measure the fair value of an asset fall into more than one level of the hierarchy, we have classified them based on the lowest-level input that is significant to the determination of the fair value. 

March 31, 2019	Level 1		Level 2		Level 3		Total Fair Value
Assets:
Cash and cash equivalents	$	192,260	$	-	$	-	$	192,260
Other long-term investments		1,371		-		-		1,371
Total assets	$	193,631	$	-	$	-	$	193,631
Liabilities:
Derivative financial instruments		-		8,401		-		8,401
Total liabilities	$	-	$	8,401	$	-	$	8,401

September 30, 2018	Level 1		Level 2		Level 3		Total Fair Value
Assets:
Cash and cash equivalents	$	352,921	$	-	$	-	$	352,921
Other long-term investments		1,137		-		-		1,137
Total assets	$	354,058	$	-	$	-	$	354,058
Liabilities:
Derivative financial instruments		-		339		-		339
Total liabilities	$	-	$	339	$	-	$	339

Our cash and cash equivalents consist of various bank accounts used to support our operations and investments in institutional money-market funds that are traded in active markets.  We invest only in AAA-rated, prime institutional money market funds, comprised of high quality, short-term fixed income securities. Our other long-term investments represent the fair value of investments under the Cabot Microelectronics Supplemental Employee Retirement Plan (SERP), which is a nonqualified supplemental savings plan.  The fair value of the investments is determined through quoted market prices within actively traded markets. Although the investments are allocated to individual participants and investment decisions are made solely by those participants, the SERP is a nonqualified plan.   Consequently, the Company owns the assets and the related offsetting liability for disbursement until a participant makes a qualifying withdrawal.  The long-term investment was adjusted to $1,371 in the second quarter of fiscal 2019 to reflect its fair value as of March 31, 2019.

Our derivative financial instruments include foreign exchange contracts and interest rate swap.  During the quarter, we entered into a floating-to-fixed interest rate swap agreement to hedge the variability in LIBOR-based interest payments on a portion of our outstanding variable rate debt.  The fair value of our derivative instruments is estimated using standard valuation models and market-based observable inputs over the contractual term, including one-month LIBOR-based yield curves for interest rate swap, and forward rates and/or the Overnight Index Swap (OIS) curve for forward foreign exchange contracts, among others.  We consider the risk of nonperformance, including counterparty credit risk, in the calculation of the fair value of derivative financial instruments.  See Note 11 of this Report on Form 10-Q for more information on our use of derivative financial instruments.

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6. INVENTORIES

Inventories consisted of the following:

	March 31, 2019		September 30, 2018
Raw materials	$	58,496	$	35,150
Work in process		12,569		8,117
Finished goods		76,259		28,659
Total	$	147,324	$	71,926

7. GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill was $705,426 as of March 31, 2019, and $101,083 as of September 30, 2018.  The increase in goodwill was due to $604,510 in goodwill related to the acquisition of KMG offset by $167 in foreign exchange fluctuations.  The amount of goodwill assigned to each of the Electronic Materials and Performance Materials segments was $358,141 and $347,285, respectively.

The components of other intangible assets are as follows:

	March 31, 2019				September 30, 2018
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Other intangible assets subject to amortization:
Product technology, trade secrets and know-how	$	134,340	$	31,131	$	48,825	$	25,305
Acquired patents and licenses		10,570		8,315		8,270		8,252
Customer relationships, trade names, and distribution rights		739,560		37,816		28,068		17,574
Total other intangible assets subject to amortization		884,470		77,262		85,163		51,131
Other intangible assets not subject to amortization:
Other indefinite-lived intangibles*		47,170				1,170
Total other intangible assets not subject to amortization		47,170				1,170
Total other intangible assets	$	931,640	$	77,262	$	86,333	$	51,131

*Other indefinite-lived intangible assets not subject to amortization consist primarily of trade names.

As discussed in Note 4, we recorded $844,800 of intangible assets related to our acquisition of KMG.  The allocation of the amount into the various categories of intangible assets, as well as useful lives we have established, are discussed in Note 4.

Amortization expense on our intangible assets was $16,960 and $26,318 for the three and six months ended March 31, 2019, respectively, and was $1,963 and $3,936 for the three and six months ended March 31, 2018, respectively. Estimated future amortization expense for the five succeeding fiscal years is as follows:

Fiscal Year	Estimated Amortization Expense
Remainder of 2019	$	33,881
2020		87,936
2021		87,233
2022		79,822
2023		67,663

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Goodwill and indefinite-lived intangible assets are tested for impairment annually in the fourth quarter of our fiscal year or more frequently if indicators of potential impairment exist, using a fair-value-based approach. The recoverability of goodwill is measured at the reporting unit level, which is defined as either an operating segment or one level below an operating segment. An entity has the option to assess the fair value of a reporting unit either using a qualitative analysis ("step zero") or a quantitative analysis ("step one"). Similarly, an entity has the option to use a step zero or a step one approach to determine the recoverability of indefinite-lived intangible assets. In 2018, we chose to use a step one analysis for both goodwill impairment and for indefinite-lived intangible asset impairment, with the exception of our CMP slurries reporting unit, for which we chose to use a step zero analysis for fiscal 2018.

We completed our annual impairment test during our fourth quarter of fiscal 2018 and concluded that no impairment existed.  There were no indicators of potential impairment during the quarter ended March 31, 2019, so it was not necessary to perform an impairment review for goodwill and indefinite-lived intangible assets during the quarter.  There have been no impairment charges recorded on the goodwill for any of our reporting units.

8. OTHER LONG-TERM ASSETS

Other long-term assets consisted of the following:

	March 31, 2019		September 30, 2018
Long-term contract assets		1,024		1,548
Long-term SERP Investment		1,371		1,137
Prepaid unamortized debt issuance cost		795		-
Other long-term assets		3,025		1,979
Total	$	6,215	$	4,664

9. ACCRUED EXPENSES, INCOME TAXES PAYABLE AND OTHER CURRENT LIABILITIES

Accrued expenses, income taxes payable and other current liabilities consisted of the following:

	March 31, 2019		September 30, 2018
Accrued compensation	$	26,148	$	35,367
Income taxes payable		18,889		18,045
Dividends payable		12,742		10,822
Taxes, other than income taxes		6,530		1,976
Accrued interest		4,197		-
Contract liabilities		3,611		4,894
Goods and services received, not yet invoiced		4,260		1,954
Other accrued expenses		10,536		9,925
Total	$	86,913	$	82,983

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10. DEBT

On the Acquisition Date, we entered into the Credit Agreement by and among the Company, the lenders party thereto and JPMorgan Chase Bank, N.A., as administrative agent, which provides for senior secured financing of up to $1,265.0 million, consisting of the Term Loan Facility in an aggregate principal amount of $1,065.0 million and the Revolving Credit Facility in an aggregate principal amount of up to $200.0 million, including a letter of credit sub-facility of up to $50.0 million.  The Term Loan Facility and the Revolving Credit Facility are referred to as the “Credit Facilities.”

Proceeds of the loans borrowed under the Term Loan Facility on the Acquisition Date were used to fund, in part, the Acquisition and certain of KMG’s existing indebtedness, and to pay related fees and expenses. The Revolving Credit Facility remains undrawn.

The Credit Facilities are guaranteed by each of the Company’s wholly owned domestic subsidiaries, including KMG and its subsidiaries, and are secured by substantially all assets of the Company and of each subsidiary guarantor, in each case subject to certain exceptions.

Borrowings under the Credit Facilities bear interest at a rate per annum equal to, at the Company’s option, either (a) a LIBOR, subject to a 0.00% floor, or (b) a base rate, in each case plus an applicable margin of, in the case of borrowings under the Term Loan Facility, 2.25% for LIBOR loans and 1.25% for base rate loans and, in the case of borrowings under the Revolving Credit Facility, initially, 1.50% for LIBOR loans and 0.50% for base rate loans. The applicable margin for borrowings under the Revolving Credit Facility varies depending on the Company’s first lien secured net leverage ratio. The Company is also required to pay a commitment fee currently equal to 0.25% per annum to the lenders under the Revolving Credit Facility in respect of the unutilized commitments thereunder. The commitment fee under the Revolving Credit Facility varies depending on the Company’s first lien secured net leverage ratio.

The Term Loan Facility matures on November 15, 2025, the seven-year anniversary of the Acquisition Date, and amortizes in equal quarterly installments of 0.25% of the initial principal amount, starting with the first full fiscal quarter after the Acquisition Date. The Revolving Facility matures on November 15, 2023, the five-year anniversary of the Acquisition Date. In addition, the Company is required to prepay outstanding loans under the Term Loan Facility, subject to certain exceptions, with up to 50% of the Company’s annual excess cash flow, as defined under the Credit Agreement, and 100% of the net cash proceeds of certain recovery events and non-ordinary course asset sales.

The Company may generally prepay outstanding loans under the Credit Facilities at any time, without prepayment premium or penalty, subject to customary “breakage” costs with respect to LIBOR rate loans. Prepayments of the Term Loan Facility in connection with certain “repricing events” resulting in a lower yield occurring at any time during the first six months after the Acquisition Date must be accompanied by a 1.00% prepayment premium.  During this quarter we made a prepayment of $45.0million.  Subsequent to the end of the quarter ended March 31, 2019, we made an additional prepayment of $55.0million.

The Revolving Credit Facility requires that the Company maintain a maximum first lien secured net leverage ratio, as defined in the Credit Agreement, of 4.00 to 1.00 as of the last day of each fiscal quarter if any revolving loans are outstanding, commencing with the first full fiscal quarter after the Acquisition Date.

The Credit Agreement contains certain affirmative and negative covenants that limit the ability of the Company, among other things and subject to certain significant exceptions, to incur debt or liens, make investments, enter into certain mergers, consolidations, asset sales and acquisitions, pay dividends and make other restricted payments and enter into transactions with affiliates. We believe we are in compliance with these covenants.

The Credit Agreement contains certain events of default, including relating to a change of control. If an event of default occurs, the lenders under the Credit Facilities will be entitled to take various actions, including the acceleration of amounts due under the Credit Facilities.

At March 31, 2019, the fair value of the Term Loan Facility, using level 2 inputs, approximated its carrying value of $1,020,000 as the loan bears a floating market rate of interest. As of March 31, 2019, $13,313 of the debt outstanding was classified as short-term, and $19,411 of debt issuance costs related to our Term Loan were presented as a reduction of long-term debt.

In the second quarter of fiscal 2019, we entered into a floating-to-fixed interest rate swap agreement to hedge the variability in our LIBOR-based interest payments on approximately 70% of our Term Loan Facility balance.  See Note 11 on the Report on Form 10-Q for additional information.

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Principal repayments of the Term Loan Facility are generally made on the last calendar day of each quarter if that day is considered to be a business day.  As of March 31, 2019, scheduled principal repayments of the Term Loan were as follows:

Fiscal Year	Principal Repayments
Remainder of 2019	$	7,988
2020		10,650
2021		10,650
2022		10,650
2023		10,650
Greater than 5 years		969,412
Total	$	1,020,000

11. DERIVATIVE FINANCIAL INSTRUMENTS

We are exposed to various market risks, including risks associated with interest rates and foreign currency exchange rates.  We enter into certain derivative transactions to mitigate the volatility associated with these exposures.  We have policies in place that define acceptable instrument types we may enter into and we have established controls to limit our market risk exposure.  We do not use derivative financial instruments for trading or speculative purposes.  In addition, all derivatives, whether designated in hedging relationships or not, are required to be recorded on the Consolidated Balance Sheets at fair value on a gross basis.

Cash Flow Hedges - Interest Rate Swap Agreements

During the quarter, we entered into a floating-to-fixed interest rate swap agreement to hedge the variability in LIBOR-based interest payments on a portion of our outstanding variable rate debt.  As of March 31, 2019, the notional value of the swap was $746,000 and this value is scheduled to decrease bi-annually, and expire on January 31, 2024.

We have designated this swap agreement as a cash flow hedge pursuant to ASC 815, "Derivatives and Hedging".  Based on certain quantitative and qualitative assessments, we have determined that the hedge is highly effective and qualifies for hedge accounting.  Accordingly, unrealized gains and losses on the hedge are recorded in other comprehensive income.  Realized gains and losses are recorded on the same financial statement line as the hedged item, which is interest expense.

Foreign Currency Contracts Not Designated as Hedges

On a regular basis, we enter into forward foreign exchange contracts in an effort to mitigate the risks associated with currency fluctuations on certain foreign currency balance sheet exposures.  These foreign exchange contracts do not qualify for hedge accounting; therefore, the gains and losses resulting from the impact of currency exchange rate movements on our forward foreign exchange contracts are recognized as other income or expense in the accompanying consolidated income statements in the period in which the exchange rates change.  As of March 31, 2019 and September 30, 2018, the notional amounts of the forward contracts we held to purchase U.S. dollars in exchange for foreign currencies were $4,102 and $7,652, respectively, and the notional amounts of forward contracts we held to sell U.S. dollars in exchange for foreign currencies were $23,815 and $24,860, respectively.

Net Investment Hedge - Foreign Exchange Contracts

In September 2017, we entered into forward contracts to sell 100 billion Korean won and buy U.S. dollars, which we subsequently terminated in the third quarter of fiscal 2018. We had designated these forward contracts as effective net investment hedges. During the second quarter of fiscal 2018, the change in the fair value of these forward contracts in the net investment hedge relationship was $2,966, which was recorded in foreign currency translation adjustments within other comprehensive income.

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The fair value of our derivative instruments included in the Consolidated Balance Sheets, which was determined using Level 2 inputs, was as follows:

		Asset Derivatives				Liability Derivatives
	Consolidated Balance Sheet Locatio	March 31, 2019		September 30, 2018		March 31, 2019		September 30, 2018
Derivatives designated as hedging instruments
Interest rate swap contract	Accrued expenses, income taxes payable and other current liabilities	$	-	$	-	$	781	$	-
	Other long-term liabilities		-		-	$	7,572	$	-
Derivatives not designated as hedging instruments
Foreign exchange contracts	Prepaid expenses and other current assets	$	-	$	-	$	-	$	-
	Accrued expenses, income taxes payable and other current liabilities	$	-	$	-	$	48	$	339

The following table summarizes the effect of our derivative instruments on our Consolidated Statements of Income for the three and six months ended March 31, 2019 and 2018:

		Gain (Loss) Recognized in Statement of Income
		Three Months Ended							Six Months Ended
	Statement of Income Location	March 31, 2019				March 31, 2018			March 31, 2019				March 31, 2018
Derivatives not designated as hedging instruments
Foreign exchange contracts	Other income (expense), net		$	(348	)		$	887		$	(38	)		$	78

The interest rate swap agreement has been deemed to be effective, and realized gains and losses were immaterial to our Consolidated Statement of Income.  We recorded an unrealized loss of $6,473, net of tax, in accumulated comprehensive income during the three and six months ended March 31, 2019 for this interest rate swap.  As of March 31, 2019, during the next 12 months, we expect approximately $781 to be reclassed from accumulated other comprehensive income into interest expense related to our interest rate swap based on projected rates of the LIBOR forward curve as of March 31, 2019.

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12. COMMITMENTS AND CONTINGENCIES

LEGAL PROCEEDINGS

We periodically become a party to legal proceedings, arbitrations and regulatory proceedings (“contingencies”) arising in the ordinary course of our business operations. The ultimate resolution of these contingencies is subject to significant uncertainty, and should we fail to prevail in any of them or should several of them be resolved against us in the same reporting period, these matters could, individually or in the aggregate, be material to the consolidated financial statements. One of these contingencies, which we assumed in connection with our acquisition of KMG, is discussed below. The ultimate outcome of these matters, however, cannot be determined at this time, nor can the amount of any potential loss be reasonably estimated, and as a result except where indicated no amounts have been recorded in our consolidated financial statements.  The Company records legal costs associated with loss contingencies as expenses in the period in which they are incurred.

The United States Environmental Protection Agency (“EPA”) has notified KMG’s subsidiary, KMG-Bernuth, that the EPA considered it to be a potentially responsible party under the Comprehensive Environmental Response, Compensation and Liability Act of 1980, as amended (“CERCLA”) by virtue of its relationship with certain alleged predecessor companies, including Idacon, Inc. (f/k/a Sonford Chemical Company in connection with the Star Lake Canal Superfund Site near Beaumont, Texas. The EPA has estimated that the remediation will cost approximately $22.0 million. KMG and approximately seven other parties entered into an agreement with the EPA in September 2016 to complete a remedial design phase of the remediation of the site. The remediation work will be performed under a separate future agreement. Although KMG has not conceded liability, KMG established a reserve in connection with the remedial design, and as of March 31, 2019, the reserve remaining was $1,008.  We also may face other governmental or third-party claims, or otherwise incur costs, relating to cleanup of, or for injuries resulting from, contamination at sites associated with this or other past and present operations. We accrue for environmental liabilities when a determination can be made that they are probable and reasonably estimable.

Other than as described above, we are not involved in any legal proceedings that we believe could have a material impact on our consolidated financial position, results of operations or cash flows.

In addition, our Company is subject to extensive federal, state and local laws, regulations and ordinances in the U.S. and in other countries. These regulatory requirements relate to the use, generation, storage, handling, emission, transportation and discharge of certain hazardous materials, substances and waste into the environment.  The Company, including its KMG entities, manage Environmental, Health and Safety (“EHS”) matters related to protection of the environment and human health, the cleanup of contaminated sites, the treatment, storage and disposal of wastes, and the emission of substances into the air or waterways, among other EHS concerns.  Governmental authorities have the power to enforce compliance with their regulations, and violators may be subject to fines, injunctions or both. The Company devotes significant financial resources to compliance, including costs for ongoing compliance.

Certain licenses, permits and product registrations are required for the Company’s products and operations in the U.S., Mexico and other countries in which it does business. The licenses, permits and product registrations are subject to revocation, modification and renewal by governmental authorities.  In the U.S.  in particular, producers and distributors of pentachlorophenol (“penta”), which is a product manufactured and sold by a KMG subsidiary as part of the wood treatment business, are subject to registration and notification requirements under the Federal Insecticide, Fungicide and Rodenticide Act (“FIFRA”) and comparable state law in order to sell this product in the U.S. Compliance with these requirements may have a significant effect on our business, financial condition and results of operations.

We are subject to contingencies, including litigation relating to EHS laws and regulations, commercial disputes and other matters. Certain of these contingencies are discussed below. The ultimate resolution of these contingencies is subject to significant uncertainty, and should we fail to prevail in any of them or should several of them be resolved against us in the same reporting period, these matters could, individually or in the aggregate, be material to the consolidated financial statements. The ultimate outcome of these matters, however, cannot be determined at this time, nor can the amount of any potential loss be reasonably estimated, and as a result except where indicated no amounts have been recorded in our consolidated financial statements.  The Company records legal costs associated with loss contingencies as expenses in the period in which they are incurred.

Refer to Note 17 of “Notes to the Consolidated Financial Statements” in Item 8 of Part II of our Annual Report on Form 10-K for the fiscal year ended September 30, 2018, for additional information regarding commitments and contingencies.

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POSTRETIREMENT OBLIGATIONS IN FOREIGN JURISDICTIONS

We have defined benefit plans covering employees in certain foreign jurisdictions as required by local law, which are unfunded. We adopted ASU 2017-07 during the first quarter of the fiscal year and pursuant to the adoption, net service costs are recorded as fringe benefit expense under cost of sales and operating expenses, and all other costs are recorded in the Other income (expense), net in our Consolidated Statements of Income.  The projected benefit obligations and accumulated benefit obligations under all such unfunded plans are updated annually during the fourth quarter of the fiscal year. Benefit payments under all such unfunded plans to be paid over the next ten years are expected to be approximately $7,906.  For more information regarding these plans, refer to Note 17 of “Notes to the Consolidated Financial Statements” included in Item 8 of Part II of our Annual Report on Form 10-K for the fiscal year ended September 30, 2018.

PURCHASE OBLIGATIONS

Purchase obligations include take-or-pay arrangements with suppliers, and purchase orders and other obligations entered into in the normal course of business regarding the purchase of goods and services.  We have been operating under a fumed silica supply agreement with Cabot Corporation, our former parent company which is not a related party, the current term of which runs through December 2019.  As of March 31, 2019, purchase obligations include $11,073 of contractual commitments related to our Cabot Corporation supply agreement for fumed silica.

13. ACCUMULATED OTHER COMPREHENSIVE INCOME

The table below summarizes the components of accumulated other comprehensive income (AOCI), net of tax provision/(benefit), as of March 31, 2019 and 2018: 

	Foreign Currency Translation		Cash Flow Hedges			Pension and Other Postretirement Liabilities			Total
Balance at September 30, 2018	$	5,918	$	(17	)	$	(1,362	)	$	4,539
Foreign currency translation adjustment, net of tax of $(21)		1,433		-			-			1,433
Unrealized gain (loss) on cash flow hedges:
Change in fair value, net of tax of $(1,879)		-		(6,473	)		-			(6,473	)
Reclassification adjustment into earnings, net of tax of $0		-		(1	)		-			(1	)
Balance at March 31, 2019	$	7,351	$	(6,491	)	$	(1,362	)	$	(502	)

	Foreign Currency Translation		Cash Flow Hedges			Pension and Other Postretirement Liabilities			Total
Balance at September 30, 2017	$	5,239	$	46		$	(1,336	)	$	3,949
Foreign currency translation adjustment, net of tax of $(1,384)		11,105		-			-			11,105
Unrealized gain (loss) on cash flow hedges:
Change in fair value, net of tax of $57		-		165			-			165
Reclassification adjustment into earnings, net of tax of $(6)		-		(18	)		-			(18	)
Balance at March 31, 2018	$	16,344	$	193		$	(1,336	)	$	15,201

The before tax amount reclassified from AOCI to net income during the three and six months ended March 31, 2019 and 2018, related to cash flow hedges, were recorded as interest expense on our Consolidated Statement of Income.

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14. SHARE-BASED COMPENSATION PLANS

We issue share-based awards under the following programs: our Cabot Microelectronics Corporation 2012 Omnibus Incentive Plan, as amended effective March 7, 2017 (OIP); our Cabot Microelectronics Corporation 2007 Employee Stock Purchase Plan, as Amended and Restated January 1, 2010 (ESPP); and, pursuant to the OIP, our Directors' Deferred Compensation Plan, as amended September 23, 2008 (DDCP), and our 2001 Executive Officer Deposit Share Program (DSP).  In March 2017, our stockholders reapproved the material terms of performance-based awards under the OIP for purposes of complying with Section 162(m) of the Internal Revenue Code of 1986, as amended.  For additional information regarding these programs, refer to Note 12 of "Notes to the Consolidated Financial Statements" included in Item 8 of Part II of our Annual Report on Form 10-K for the fiscal year ended September 30, 2018. 

We record share-based compensation expense for all share-based awards, including stock option grants, and restricted stock, restricted stock unit and performance share unit ("PSU") awards, and employee stock purchase plan purchases.  We calculate share-based compensation expense using the straight-line approach based on awards ultimately expected to vest, which requires the use of an estimated forfeiture rate.  Our estimated forfeiture rate is primarily based on historical experience, but may be revised in future periods if actual forfeitures differ from the estimate.  We use the Black-Scholes option-pricing model to estimate the grant date fair value of our stock options and employee stock purchase plan purchases.  This model requires the input of highly subjective assumptions, including the price volatility of the underlying stock, the expected term of our stock options, expected dividend yield and the risk-free interest rate.  We estimate the expected volatility of our stock options based on a combination of our stock's historical volatility and the implied volatilities from actively-traded options on our stock.  We calculate the expected term of our stock options using historical stock option exercise data, and for stock option grants made prior to December 2017, we have added a slight premium to this expected term for employees who meet the definition of retirement-eligible pursuant to their stock option grants during the contractual term of the grant.  As of December 2017, the provisions of stock option grants and restricted stock unit awards stated that, except in certain circumstances including termination for cause, once an employee meets the retirement eligibility requirements, any remaining unvested share-based awards will continue to vest regardless of termination of service. Consequently, the requisite service period for the award is satisfied upon retirement eligibility. Therefore, we record the total share-based compensation expense upon award for those employees who have met the retirement eligibility at the grant date. The expected dividend yield represents our annualized dividend in dollars divided by the stock price on the date of grant.  The risk-free interest rate is derived from the U.S. Treasury yield curve in effect at the time of grant.

The PSUs that have been awarded may be subject to downward or upward adjustment depending on the total shareholder return achieved by the Company during the particular performance period related to the PSUs, relative to the total shareholder return of an established market index.  We use a third-party service provider to estimate the fair value of the PSUs at grant date by using a Monte Carlo simulation model. This model simulates the stock price movements of the Company and Index constituents using certain assumptions, including the stock price of the Company and index constituents, the risk-free interest rate and stock price volatility.  Subsequent to the KMG acquisition, the performance metrics of the PSUs awarded in December 2017 were modified to reflect the performance results expected due to the Acquisition. We have applied modification accounting to account for the change in the related compensation cost and recorded a cumulative effect reduction in compensation cost of $778 during the three months ended March 31, 2019.

KMG awards granted subsequent to the entry into the definitive agreement, but prior to the Acquisition Date, were converted to our restricted stock units (“Replacement Award”), with vesting in three equal installments on the first three anniversaries of the original award date. If the recipient is terminated without cause or resigns with good reason during the 18 months following the Acquisition Date, the Replacement Award will vest as of such termination date in a number of shares equal to 150% of the Replacement Award. The share-based compensation expense related to the Replacement Awards, including accelerated vesting, was $3,253 in the first quarter of fiscal 2019 and not material in the second quarter of fiscal 2019. The expense was included in the table below.

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Share-based compensation expense for the three and six months ended March 31, 2019 and 2018, was as follows:

	Three Months Ended March 31,						Six Months Ended March 31,
	2019			2018			2019			2018
Cost of sales	$	574		$	567		$	1,629		$	1,354
Research, development and technical		442			516			1,343			1,046
Selling, general and administrative		2,522			3,201			8,736			7,704
Total share-based compensation expense		3,538			4,284			11,708			10,104
Tax benefit		(761	)		(1,022	)		(2,452	)		(2,249	)
Total share-based compensation expense, net of tax	$	2,777		$	3,262		$	9,256		$	7,855

For additional information regarding the estimation of fair value, refer to Note 12 of "Notes to the Consolidated Financial Statements" included in Item 8 of Part II of our Annual Report on Form 10-K for the fiscal year ended September 30, 2018.

15. INCOME TAXES

The Company’s effective tax rate was 28.5% and 26.0% for the three and six months ended March 31, 2019, respectively, compared to a 19.6% and 63.8% effective income tax rate for the three and six months ended March 31, 2018.  The decrease in our effective tax rate for the six months ended March 31, 2019 compared to the prior year is primarily attributable to the changes introduced by the Tax Act enacted in December 2017.  Other factors that impacted the Company’s effective tax rate for the three and six months ended March 31, 2019 were primarily related to unfavorable tax treatment of certain KMG acquisition-related costs, such as compensation deduction limitations, as well as non-deductibility of certain professional fees.  Additionally, we recorded incremental tax expense for the Global Intangible Low Taxed Income (“GILTI”) provision of the Tax Act, which was effective for the first time during our fiscal 2019. Partially offsetting these adverse items, the Tax Act reduced the corporate income tax rate to 21.0%  effective January 1, 2018, resulting in a change in our blended tax rate of 24.5% in fiscal 2018 to 21.0% beginning with our fiscal 2019.  In the quarter ended December 31, 2018, the Company completed its provisional estimates with regard to the Tax Act and the Transition Tax and Withholding Tax obligations are now determined to be complete.

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16. EARNINGS PER SHARE

Basic earnings per share (EPS) is calculated by dividing net income available to common stockholders by the weighted-average number of common shares outstanding during the period, excluding the effects of unvested restricted stock awards that have a right to receive non-forfeitable dividends, which are considered participating securities as prescribed by the two-class method under ASC 260 “Earnings per Share”.  Beginning in the first quarter of fiscal 2019, the amount of participating securities was no longer material and therefore, we have excluded such securities from our calculation of EPS in fiscal 2019.  Diluted EPS is calculated in a similar manner, but the weighted-average number of common shares outstanding during the period is increased to include the weighted-average dilutive effect of “in-the-money” stock options and unvested restricted stock shares using the treasury stock method.

The standards of accounting for earnings per share require companies to provide a reconciliation of the numerator and denominator of the basic and diluted earnings per share computations.  Basic and diluted earnings per share were calculated as follows:

	Three Months Ended March 31,					Six Months Ended March 31,
	2019		2018			2019		2018
Numerator:
Net Income	$	27,137	$	29,737		$	40,580		26,654
Less: income attributable to participating securities		-		(30	)		-		(34	)
Earnings available to common shares	$	27,137	$	29,707		$	40,580		26,620
Denominator:
Weighted average common shares		28,997,632		25,592,508			28,065,759		25,473,757
(Denominator for basic calculation)
Weighted average effect of dilutive securities:
Share-based compensation		481,482		568,678			541,274		601,925
Diluted weighted average common shares		29,479,114		26,161,186			28,607,033		26,075,682
(Denominator for diluted calculation)
Earnings per share:
Basic	$	0.94	$	1.16		$	1.45		1.05
Diluted	$	0.92	$	1.14		$	1.42		1.02

Approximately 0.2 million shares for both the three and six months ended March 31, 2019 and 0.1 million shares for both the three and six months ended March 31, 2018, attributable to outstanding stock options were excluded from the calculation of diluted earnings per share.

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17. SEGMENT REPORTING

We identify our segments based on our management structure and the financial information used by our chief executive officer, who is our chief operating decision maker, to assess segment performance and allocate resources among our operating units.  We historically have operated predominantly in one industry segment – the development, manufacture and sale of Chemical Mechanical Planarization (CMP) consumables products.  With our acquisition of KMG, we reassessed our operating and reportable segments, and determined that we now have the following two reportable segments:

Electronic Materials

Electronic Materials includes products and solutions for the semiconductor industry.  We manufacture and sell CMP consumables, including CMP slurries and polishing pad products, and high-purity process chemicals used to etch and clean silicon wafers in the production of semiconductors, photovoltaics (solar cells) and flat panel displays.

Performance Materials

Performance Materials includes pipeline performance products and services for oilfield energy industries, wood treatment products, and products and equipment used in the precision optics industry.

Beginning in fiscal 2019 and with the acquisition of KMG, our chief operating decision maker evaluates segment performance based upon revenue and segment adjusted EBITDA.  Segment adjusted EBITDA is defined as earnings before interest, income taxes, depreciation and amortization, adjusted for certain items that affect comparability from period to period.  These adjustments include items related to our acquisition of KMG, such as expenses incurred to complete the acquisition, integration-related expenses and impact of fair value adjustments to inventory acquired from KMG. We exclude these items from earnings when presenting our adjusted EBITDA measure because we believe they will be incurred infrequently and/or are otherwise not indicative of a segment's regular, ongoing operating performance. Adjusted EBITDA is also the basis of a performance metric for our fiscal 2019 Short-Term Incentive Program (STIP).  In addition, our chief operating decision maker does not use assets by segment to evaluate performance or allocate resources. Therefore, we do not disclose assets by segment.

Revenue from external customers and segment adjusted EBITDA were (in thousands):

	Three Months Ended March 31,						Six Months Ended March 31,
	2019			2018			2019			2018
Segment Revenue
Electronic Materials		$	212,846		$	136,103		$	403,462		$	269,417
Performance Materials			52,545			6,875			83,707			13,540
Total		$	265,391		$	142,978		$	487,169		$	282,957

	Three Months Ended March 31,						Six Months Ended March 31,
	2019			2018			2019			2018
Segment adjusted EBITDA:
Electronic Materials	$	74,910		$	52,285		$	149,735		$	105,181
Performance Materials		22,660			1,231			35,727			2,519
Unallocated corporate expenses		(12,052	)		(9,884	)		(23,094	)		(20,735	)
Interest income		568			1,156			1,587			2,107
Interest expense		(13,331	)		(1,158	)		(20,221	)		(2,290	)
Depreciation and amortization		(27,348	)		(6,638	)		(43,889	)		(13,138	)
Charge for fair value write-up of acquired inventory sold		(4,566	)		-			(14,827	)		-
Acquisition and integration related expenses		(2,904	)		-			(30,198	)		-
Income before income taxes	$	37,937		$	36,992		$	54,820		$	73,644

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We began to manage and report our results under the new organizational structure in conjunction with the KMG acquisition in fiscal 2019 and have reflected this change for all historical periods presented. Since the two segments operate independently and serve different markets and customers, there are no sales between segments.  Revenue from external customers and segment adjusted EBITDA shown for Performance Materials for the quarter ended March 31, 2018 includes Cabot Microelectronics’ heritage QED business and an immaterial business that was sold in March 2018.  The adjustments to segment EBITDA for the three and six months ended March 31, 2019 represent addbacks of KMG acquisition and integration related expenses, and a charge for the write-up of inventory acquired from KMG to fair value, for inventory sold in the period.  There were no adjustments to segment EBITDA for the three months ended March 31, 2018.  Unallocated corporate expenses include expenses associated with executive leadership and public company costs, and the unallocated portions of corporate functions including finance, legal, human resources, information technology, and corporate development not directly attributable to a reportable segment.

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

The following "Management's Discussion and Analysis of Financial Condition and Results of Operations", as well as disclosures included elsewhere in this Report on Form 10-Q, include "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995.  This Act provides a safe harbor for forward-looking statements to encourage companies to provide prospective information about themselves so long as they identify these statements as forward-looking and provide meaningful cautionary statements identifying important factors that could cause actual results to differ from the projected results.  All statements other than statements of historical fact we make in this Report on Form 10-Q are forward-looking, which address a variety of subjects including, for example, future sales and operating results; growth or contraction, and trends in the industry and markets in which the Company participates; the acquisition of, investment in, or collaboration with other entities, including the Company’s acquisition of KMG Chemicals, Inc. (“KMG”), and the expected benefits and synergies of such acquisition; new product introductions; development of new products, technologies and markets; product performance; the financial conditions of the Company's customers; competitive landscape; the Company's supply chain; natural disasters; various economic or political factors and international or national events, including related to the enactment of trade sanctions, tariffs, or other similar matters; the generation, protection and acquisition of intellectual property, and litigation related to such intellectual property or third party intellectual property; environmental laws and regulations; the operation of facilities by Cabot Microelectronics; the Company's management; foreign exchange fluctuation; the Company's current or future tax rate, including the effects of the Tax Cuts and Jobs Act in the United States (“tax act”); cybersecurity threats; and financing facilities and related debt, pay off or payment of principal and interest, and compliance with covenants and other terms; and, uses and investment of the Company's cash balance, including dividends and share repurchases, which may be suspended, terminated or modified at any time for any reason by the Company, based on a variety of factors. Statements that are not historical facts, including statements about Cabot Microelectronics’ beliefs, plans and expectations, are forward-looking statements. Such statements are based on current expectations of Cabot Microelectronics’ management and are subject to a number of factors and uncertainties, which could cause actual results to differ materially from those described in the forward-looking statements. For information about factors that could cause actual results to differ materially from those described in the forward-looking statements, please refer to Cabot Microelectronics’ filings with the Securities and Exchange Commission (“SEC”), including the risk factors contained in Cabot Microelectronics’ Annual Report on Form 10-K and in this Report on Form 10-Q. Except as required by law, Cabot Microelectronics undertakes no obligation to update forward-looking statements made by it to reflect new information, subsequent events or circumstances. The section entitled "Risk Factors" describes some, but not all, of the factors that could cause these differences.

This section, "Management's Discussion and Analysis of Financial Condition and Results of Operations” (MD&A), should be read in conjunction with our Annual Report on Form 10-K for the fiscal year ended September 30, 2018, including the Consolidated Financial Statements and related notes thereto.

 SECOND QUARTER OF FISCAL 2019 OVERVIEW

Cabot Microelectronics Corporation ("Cabot Microelectronics'', "the Company'', "us'', "we'', or "our'') is a leading global supplier of consumable materials to semiconductor manufacturers and pipeline operators.  As previously reported, on November 15, 2018 (“Acquisition Date”), we completed our acquisition of KMG Chemicals, Inc. (“KMG”), which produces and distributes specialty chemicals and performance materials for the semiconductor, industrial wood preservation, pipeline and energy industries (“Acquisition”). The Acquisition has extended and strengthened our position as one of the leading suppliers of consumable materials to the semiconductor industry and has expanded our portfolio with the addition of KMG’s performance materials business, which enables us to be a leading global provider of performance products and services to the pipeline operations industry. The Consolidated Financial Statements included in this Report on Form 10-Q include the financial results of KMG from the Acquisition Date. Subsequent to the Acquisition, we now operate our business within two reportable segments: Electronic Materials and Performance Materials. The Electronic Materials segment consists of our heritage CMP slurries and polishing pads businesses, as well as the recently-acquired KMG electronic chemicals business.  The Performance Materials segment includes KMG’s heritage pipeline performance and wood treatment businesses, and our heritage QED business. For additional information, refer to Part 1, Item 1, “Business”, in our Annual Report on Form 10-K for the fiscal year ended  September 30, 2018.

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In the Electronic Materials segment, our CMP slurries revenue declined this quarter due primarily to softer market conditions, particularly in the memory, but also in the foundry, sectors. Our CMP slurries play a critical role in enabling DRAM and NAND production and this quarter our business was adversely impacted as our customers reduced utilization rates to address higher chip inventories and falling memory prices. In CMP pads, we delivered another quarter of strong results.  In electronic chemicals, we saw stable demand this quarter.  Looking ahead, recent reports from customers and industry analysts suggest there is still some level of uncertainty in overall semiconductor industry demand given the weakness in certain end markets, but most believe there will be some level of recovery in the second half of calendar 2019. We remain confident about growth in our business from increased future demand for global semiconductor materials, and believe we will continue to benefit from increased device complexity and growing computing power and storage requirements, which translates to additional demand for consumable materials.

In our Performance Materials segment, we recorded strong revenue, driven by results in our pipeline performance business. With continued growth expected in U.S. oil production, primarily in the Permian basin as well as expansion internationally, we continue to experience strong demand for our drag-reducing agents, which enable pipeline operators to optimize the efficiency and throughput of oil transport.

However, there are many factors that make it difficult for us to predict future revenue trends for our Company, including those discussed in Part II, Item 1A entitled “Risk Factors” of this Report on Form 10-Q.

Revenue for our second quarter of fiscal 2019 was $265.4 million, which benefited from the acquisition of KMG and represented an increase of 85.6% from the same quarter of fiscal 2018.

Net income was $27.1 million in the second quarter of fiscal 2019, which represented a decrease of 8.7% from the same quarter of fiscal 2018. Results benefited from the acquisition of KMG, but were more than offset by acquisition-related expenses, a charge for the fair value write-up of acquired inventory sold, increased amortization and depreciation associated with re-valuing KMG assets to fair value, and higher interest expenses resulting from the debt borrowing to finance the Acquisition.  For the same reasons, diluted earnings per share decreased from $1.14 in the second quarter of fiscal 2018 to $0.92 in the current quarter.  

Adjusted EBITDA was $85.5 million in the second quarter of fiscal 2019.  This represents an increase of $41.9 million, or a 96.0% increase from the same quarter of fiscal 2018.  Adjusted EBITDA benefited from the addition of the KMG businesses and improved profitability in the Company’s heritage businesses.  Refer to the “Use of certain GAAP and Non-GAAP Financial Information” section below for the calculation of adjusted EBITDA. Adjusted EBITDA margin, which represents adjusted EBITDA as a percentage of revenue, was 32.2% for the second quarter of fiscal 2019, compared to 30.5% for the same quarter of fiscal 2018.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES AND EFFECTS OF RECENT ACCOUNTING PRONOUNCEMENTS

We discuss our critical accounting estimates and effects of recent accounting pronouncements in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included in Item 7 of Part II of our Annual Report on Form 10-K for the fiscal year ended September 30, 2018.   Except for the discussion on revenue recognition in Note 2 of the Notes to the Consolidated Financial Statements of this Report on Form 10-Q, no material changes have been made to the Company’s significant accounting policies during the first six months of fiscal 2019. See Note 2 of the Notes to the Consolidated Financial Statements of this Report on Form 10-Q for a discussion of new accounting pronouncements.

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RESULTS OF OPERATIONS

THREE MONTHS ENDED MARCH 31, 2019, VERSUS THREE MONTHS ENDED MARCH 31, 2018

REVENUE

Revenue was $265.4 million for the three months ended March 31, 2019, which represented an 85.6%, or $122.4 million, increase from the three months ended March 31, 2018, primarily due to the Acquisition. Revenue from Cabot Microelectronics’ heritage businesses decreased slightly by $0.7 million, or 0.5%, primarily due to lower sales volume, partially offset by a higher value product mix and price changes.

COST OF SALES

Total cost of sales was $150.6 million for the three months ended March 31, 2019, which represented an increase of 121.6%, or $82.6 million, from the three months ended March 31, 2018, primarily due to the Acquisition. The cost of sales from Cabot Microelectronics’ heritage businesses decreased by $3.2 million, primarily driven by lower sales volume.

GROSS MARGIN

Our gross margin was 43.3% for the three months ended March 31, 2019, compared to 52.5% for the three months ended March 31, 2018.The decrease in gross margin was primarily due to the inclusion of the KMG businesses, which reduced gross margin by 11.3 percentage points, of which 1.7 percentage points was due to the impact of the fair value write-up of acquired inventory sold. Within Cabot Microelectronics’ heritage businesses, gross margin increased by 2.1 percentage points, which was primarily due to lower production cost and a higher value product mix, partially offset by lower sales volume.

RESEARCH, DEVELOPMENT AND TECHNICAL

Total research, development and technical expenses were $12.8 million for the three months ended March 31, 2019, which represented a decrease of 4.4%, or $0.6 million, from the three months ended March 31, 2018.  The decrease was primarily due to lower staffing-related costs of $0.9 million, including incentive compensation costs.

Our research, development and technical efforts are focused on these areas:

● Research related to fundamental CMP technology;

● Development of new and enhanced CMP consumable products, including collaboration on joint development projects with technology-leading customers and suppliers;

● Process development to support rapid and effective commercialization of new products;

● Technical support of CMP products in our customers’ research, development and manufacturing facilities; and,

● Development of polishing and metrology applications outside of the semiconductor industry.

SELLING, GENERAL AND ADMINISTRATIVE

Selling, general and administrative expenses were $50.3 million for the three months ended March 31, 2019, which represented an increase of 104.7%, or $25.7 million, from the three months ended March 31, 2018.  The increase was primarily due to $13.0 million of amortization expense related to the Acquisition, $10.8 million in KMG-related costs, and $2.9 million of acquisition and integration related costs. These items were partially offset by $1.5 million lower staffing-related costs, including incentive compensation costs.

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INTEREST EXPENSE

Interest expense was $13.3 million for the three months ended March 31, 2019, which represented an increase of $12.2 million from the three months ended March 31, 2018.  The increase resulted from the debt borrowing to finance the Acquisition.

INTEREST INCOME

Interest income was $0.6 million for the three months ended March 31, 2019, which represented a decrease of 50.9%, or $0.6 million from the three months ended March 31, 2018 due to lower cash balances compared to the same period last year.

OTHER INCOME (EXPENSE), NET

Other expense was $1.0 million for the three months ended March 31, 2019, which represented an increase of $0.9 million, from the three months ended March 31, 2018. The change was primarily due to the absence of the gain on sale of assets that had occurred in the second quarter of fiscal 2018.

PROVISION FOR INCOME TAXES

The Company’s effective tax rate for the second quarter of fiscal 2019 was 28.5%, compared to 19.6% in the same quarter last year.  The increase is primarily driven by unfavorable tax treatment of certain KMG acquisition-related costs, such as compensation deduction limitations, as well as non-deductibility of certain professional fees.

NET INCOME

Net income was $27.1 million for the three months ended March 31, 2019, which represented a decrease of 8.7%, or $2.6 million, from the three months ended March 31, 2018.  Net income benefited from the addition of the KMG businesses, and was partially offset by acquisition and integration-related expenses, a charge for fair value write-up of acquired inventory sold, increased amortization and depreciation associated with re-valuing KMG assets to fair value, and higher interest expenses resulting from the debt borrowing to finance the Acquisition.  

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SIX MONTHS ENDED MARCH 31, 2019, VERSUS SIX MONTHS ENDED MARCH 31, 2018

REVENUE

Revenue was $487.2 million for the six months ended March 31, 2019, which represented a 72.2%, or $204.2 million increase from the six months ended March 31, 2018.  The increase in revenue was primarily due to the Acquisition. Revenue from Cabot Microelectronics’ heritage businesses increased by $19.1 million, or 6.7%. This increase was primarily driven by a higher value product mix, selected price increases and higher sales volume.

COST OF SALES

Total cost of sales was $273.0 million for the six months ended March 31, 2019, which represented an increase of 103.9%, or $139.1 million, from the six months ended March 31, 2018.  The increase in cost of sales was primarily due to the Acquisition. Cost of sales of Cabot Microelectronics’ heritage businesses was relatively flat compared to the same period last year, as the higher costs associated with higher sales volume was offset by lower per unit costs.

GROSS MARGIN

Our gross margin was 44.0% for the six months ended March 31, 2019, compared to 52.7% for the six months ended March 31, 2018.The gross margin was adversely impacted by the inclusion of the KMG businesses, which reduced gross margin by 11.4 percentage points, of which 3.0 percentage points was due to the impact of the fair value write-up of acquired inventory sold. Excluding the KMG businesses, gross margin increased by 2.7 percentage points, which was primarily due to a higher value product mix.

RESEARCH, DEVELOPMENT AND TECHNICAL

Total research, development and technical expenses were $26.8 million for the six months ended March 31, 2019, which represented an increase of 5.1%, or $1.3 million, from the six months ended March 31, 2018.  The increase was primarily due to higher supplies and equipment costs used in research and development of $1.1 million.

SELLING, GENERAL AND ADMINISTRATIVE

Selling, general and administrative expenses were $111.5 million for the six months ended March 31, 2019, which represented an increase of 125.9%, or $62.1 million, from the six months ended March 31, 2018.  The increase was primarily due to $30.2 million of acquisition and integration related costs, $19.5 million of amortization expense related to the Acquisition, and $15.9 million in incremental KMG-related costs associated with the post Acquisition period during the six months period.  These items were partially offset by the absence of executive officer transition costs of $2.8 million that occurred in the first quarter of fiscal 2018.

INTEREST EXPENSE

Interest expense was $20.2 million for the six months ended March 31, 2019, which represented an increase of 783.0%, or $17.9 million for the six months ended March 31, 2018.  The increase resulted from the debt borrowing to finance the Acquisition.

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INTEREST INCOME

Interest income was $1.6 million for the six months ended March 31, 2019, which represented a decrease of 24.7%, or $0.5 million for the six months ended March 31, 2018 due to lower cash balances.

OTHER INCOME (EXPENSE), NET

Other expense was $2.4 million for the six months ended March 31, 2019, which represented an increase of 550.1%, or $2.1 million, from the six months ended March 31, 2018. The change was primarily due to the absence of the gain on sale of assets that occurred in the second quarter of fiscal 2018.

PROVISION FOR INCOME TAXES

The Company’s effective tax rate was 26.0% for the six months ended March 31, 2019, compared to 63.8% for the six months ended March 31, 2018.  The decrease in our effective tax rate for the six months ended March 31, 2019 compared to the prior year is primarily attributable to the changes introduced by the Tax Act enacted in December 2017.  Other factors that impacted the Company’s effective tax rate for the six months ended March 31, 2019 were primarily related to unfavorable tax treatment of certain Acquisition-related costs, such as compensation deduction limitations, as well as non-deductibility of certain professional fees.  Additionally, we recorded incremental tax expense for the GILTI provision of the Tax Act, which was effective for the first time during our fiscal 2019. Partially offsetting these adverse items, the Tax Act reduced the corporate income tax rate to 21.0% effective January 1, 2018, resulting in a change in our blended tax rate of 24.5% in fiscal 2018 to 21.0% beginning with our fiscal 2019.  See Note 15 of the Notes to the Consolidated Financial Statements of this Report on Form 10-Q for more information on our income taxes.

NET INCOME

Net income was $40.6 million for the six months ended March 31, 2019, which represented an increase of 52.2%, or $13.9 million, from the six months ended March 31, 2018.  The increase was primarily due to the absence of the adverse impact of the Tax Act in the first quarter of fiscal 2018, the addition of the KMG businesses post-Acquisition, and higher revenue and profitability within our heritage businesses.  These items were partially offset by acquisition and integration-related expenses, a charge for fair value write-up of acquired inventory sold, increased amortization and depreciation associated with re-valuing KMG assets to fair value, and higher interest expenses resulting from the debt borrowing to finance the Acquisition.

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SEGMENT ANALYSIS

 Segment data is presented for our two reportable segments for the three and six months ended March 31, 2019 and 2018. The segment data should be read in conjunction with our consolidated financial statements and related notes included elsewhere in thisReport on Form 10-Q.

Revenue, adjusted EBITDA and adjusted EBITDA margin by segment were (in thousands except for percentages):

	Three Months Ended March 31,						Six Months Ended March 31,
	2019			2018			2019			2018
Segment Revenue
Electronic Materials		$	212,846		$	136,103		$	403,462		$	269,417
Performance Materials			52,545			6,875			83,707			13,540
Total		$	265,391		$	142,978		$	487,169		$	282,957

	Three Months Ended March 31,								Six Months Ended March 31,
	2019				2018				2019				2018
Segment Adjusted EBITDA
Electronic Materials		$	74,910			$	52,285			$	149,735			$	105,181
Performance Materials			22,660				1,231				35,727				2,519
Unallocated Corporate Expenses			(12,052	)			(9,884	)			(23,094	)			(20,735	)
Total		$	85,518			$	43,632			$	162,368			$	86,965

	Three Months Ended March 31,		Six Months Ended March 31,
	2019	2018	2019	2018
Adjusted EBITDA margin
Electronic Materials	35.2%	38.4%	37.1%	39.0%
Performance Materials	43.1%	17.9%	42.7%	18.6%

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THREE MONTHS ENDED MARCH 31, 2019, VERSUS THREE MONTHS ENDED MARCH 31, 2018

ELECTRONIC MATERIALS

The $76.7 million increase in Electronic Materials revenue was driven by the addition of KMG’s electronic chemicals business in the quarter.  Electronic Materials revenue from Cabot Microelectronics’ heritage businesses decreased slightly primarily due to softer industry conditions that resulted in lower demand for the Company’s products. This decrease was partially offset by higher value product mix and price changes.  Electronic Materials adjusted EBITDA increased from the prior year driven by the addition of KMG’s electronic chemicals results. The slightly lower adjusted EBITDA margin was primarily due to change in mix of products, as a result of the Acquisition.

PERFORMANCE MATERIALS

The $45.7 million increase in Performance Materials revenue was primarily driven by the addition of KMG’s performance materials business in the quarter.  Performance Materials’ adjusted EBITDA and adjusted EBITDA margin expanded from the prior year due to the addition of KMG’s heritage performance materials business.

SIX MONTHS ENDED MARCH 31, 2019, VERSUS SIX MONTHS ENDED MARCH 31, 2018

ELECTRONIC MATERIALS

The $134.0 million increase in Electronic Materials revenue was driven by the addition of KMG’s electronic chemicals business since the Acquisition.  The remaining increase was driven by strong organic demand for the Company’s heritage CMP slurries and polishing pads product lines, which increased 3% and 22%, respectively, primarily on higher sales volume. Electronic Materials adjusted EBITDA increased from the prior year driven by the addition of KMG’s electronic chemicals results, as well as stronger organic profitability, driven by the leverage achieved on higher sales volume.  The slightly lower adjusted EBITDA margin was primarily due to change in mix of products, as a result of the Acquisition.

PERFORMANCE MATERIALS

The $70.2 million increase in Performance Materials revenue was primarily driven by the addition of KMG’s performance materials business post-Acquisition.  Performance Materials’ adjusted EBITDA and adjusted EBITDA margin expanded from the prior year due to the addition of KMG’s heritage performance materials business.

USE OF CERTAIN GAAP AND NON-GAAP FINANCIAL INFORMATION

We provide certain non-GAAP financial information, such as adjusted EBITDA and adjusted EBITDA margin, to complement reported GAAP results since we believe that analysis of our financial performance is enhanced by an understanding of these non-GAAP financial measures.  We exclude certain items from earnings when presenting our adjusted EBITDA measure because we believe they will be incurred infrequently and/or are otherwise not indicative of a segment's regular, ongoing operating performance.  Accordingly, we believe that they aid in evaluating the underlying operational performance of our business, and facilitate comparisons between periods. In addition, adjusted EBITDA is used as a basis of the performance metric for our fiscal 2019 Short-Term Incentive Program (STIP).  A similar EBITDA calculation is also used by our lenders for a key debt compliance ratio.

Adjusted EBITDA margin is defined as adjusted EBITDA as a percentage of revenue. Adjusted EBITDA is defined as earnings before interest, income taxes, depreciation and amortization, adjusted for certain items that affect comparability from period to period.  These adjustments include items related to our acquisition of KMG, such as expenses incurred to complete the acquisition, integration related expenses, and impact of fair value adjustments to inventory acquired from KMG.

The non-GAAP financial information provided is a supplement to, and not a substitute for, the Company’s financial results presented in accordance with U.S. GAAP. Management strongly encourages investors to review the Company’s consolidated financial statements in their entirety and to not rely on any single financial measure. These non-GAAP financial measures are provided to enhance the investor's understanding about the Company's ongoing operations. Specifically, the Company believes the impact of KMG acquisition-related expenses and acquisition-related amortization expenses are not indicative of its core operating results, and thus presents these certain metrics excluding these effects. The presentation of non-GAAP financial information is not meant to be considered in isolation or as a substitute for results prepared and presented in accordance with U.S. GAAP. A reconciliation table of GAAP to non-GAAP financial measures is contained below.

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Adjusted EBITDA for the Electronic Materials and Performance Materials segments is presented in conformity with Accounting Standards Codification Topic 280, Segment Reporting. This measure is reported to the chief operating decision maker for purposes of making decisions about allocating resources to the segments and assessing their performance. For these reasons, this measure is excluded from the definition of non-GAAP financial measures under the SEC Regulation G and Item 10(e) of Regulation S-K.

RECONCILIATION OF NET INCOME TO ADJUSTED EBITDA

The table below presents the reconciliation of net income to adjusted EBITDA. Adjusted EBITDA is not a measurement of our financial performance under GAAP and should not be considered as an alternative to net income. Adjusted EBITDA may have limitations as an analytical tool and should not be considered in isolation or as a substitute for analysis of our results as reported under GAAP.

	Three Months Ended March 31,								Six Months Ended March 31,
	2019				2018				2019				2018
Segment adjusted EBITDA
Electronic Materials		$	74,910			$	52,285			$	149,735			$	105,181
Performance Materials			22,660				1,231				35,727				2,519
Unallocated corporate expenses			(12,052	)			(9,884	)			(23,094	)			(20,735	)
Total		$	85,518			$	43,632			$	162,368			$	86,965

	Three Months Ended March 31,						Six Months Ended March 31,
	2019			2018			2019			2018
Net income	$	27,137		$	29,737		$	40,580		$	26,654
Interest expense		13,331			1,158			20,221			2,290
Interest income		(568	)		(1,156	)		(1,587	)		(2,107	)
Income taxes		10,800			7,255			14,240			46,990
Depreciation and amortization		27,348			6,638			43,889			13,138
EBITDA		78,048			43,632			117,343			86,965
Acquisition and integration related expenses		2,904			-			30,198			-
Charge for fair value write-up of acquired inventory sold		4,566			-			14,827			-
Adjusted EBITDA	$	85,518		$	43,632		$	162,368		$	86,965

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LIQUIDITY AND CAPITAL RESOURCES

We generated $53.5 million in cash flows from operating activities in the first six months of fiscal 2019, compared to $67.1 million in cash from operating activities in the first six months of fiscal 2018.  The decrease in operating cash flows was primarily due to $26.9 million spent on acquisition and integration related costs, net of tax, and an increase in working capital associated with operating a larger business.

In the first six months of fiscal 2019, cash flows used in investing activities were $1,197 million, compared to $5.9 million in cash used in investing activities in the first six months of fiscal 2018.  The increase was driven by the use of $1,182 million for the Acquisition.The remainder of the purchase price was satisfied with the issuance of common stock.  Capital expenditures in the first six months were $19.5 million, compared to $8.8 million in the prior year.

In the first six months of fiscal 2019, cash flows used in financing activities were $982.3 million, compared to $8.6 million used in financing activities in the six months ended March 31, 2018.  During the first quarter of fiscal 2019, we received $1,044 million in debt proceeds, net of $21.4 million in debt issuance costs and original issue discount fees, which was used for the Acquisition. In March 2019, we made a $45 million repayment on this debt, an increase of $38 million in debt repayment compared to prior year. In addition, our dividend payments increased by $12 million versus the prior year, driven by the doubling of our quarterly dividend, as announced in March 2018, and the new shares issued in connection with the KMG acquisition.

On the Acquisition Date, we entered into a credit agreement by and among the Company, the lenders party thereto and JPMorgan Chase Bank, N.A., as administrative agent (the “Credit Agreement”), which provides for senior secured financing of up to $1,265.0 million, consisting of a term loan facility in an aggregate principal amount of $1,065.0 million (the “Term Loan Facility”) and a revolving credit facility in an aggregate principal amount of up to $200.0 million, including a letter of credit sub-facility of up to $50.0 million (the “Revolving Credit Facility”).  The Term Loan Facility and the Revolving Credit Facility are referred to as the “Credit Facilities.” The Company may generally prepay outstanding loans under the Credit Facilities at any time, without prepayment premium or penalty, subject to customary “breakage” costs with respect to LIBOR rate loans. Prepayments of the Term Loan Facility in connection with certain “repricing events” resulting in a lower yield occurring at any time during the first six months after the Acquisition Date must be accompanied by a 1.00% prepayment premium. The Revolving Credit Facility requires that the Company maintain a maximum first lien secured net leverage ratio, as defined in the Credit Agreement, of 4.00 to 1.00 as of the last day of each fiscal quarter if any revolving loans are outstanding, commencing with the first full fiscal quarter after the Acquisition Date. Additionally, the Credit Agreement contains certain affirmative and negative covenants that limit the ability of the Company, among other things and subject to certain significant exceptions, to incur debt or liens, make investments, enter into certain mergers, consolidations, asset sales and acquisitions, pay dividends and make other restricted payments and enter into transactions with affiliates. The Credit Agreement also contains customary affirmative covenants and events of default. We believe we are in compliance with these covenants. In the second quarter of fiscal 2019, we entered into a floating-to-fixed interest rate swap agreement to hedge the variability in our LIBOR-based interest payments on approximately 70% of our Team Loan balance. During this quarter we made a prepayment of $45.0 million, and subsequent to the end of the quarter we made an additional $55.0 million prepayment.  See Note 10 of the Notes to the Consolidated Financial Statements of this Report on Form 10-Q for additional information regarding the Credit Agreement.

In January 2016, our Board of Directors authorized an increase in the amount available under our share repurchase program from the previously remaining $75.0 million to $150.0 million. As of March 31, 2019, $81.3 million remained available under our share repurchase program. Share repurchases are made from time to time, depending on market and other conditions. The timing, manner, price and amounts of repurchases are determined at the Company's discretion, and the share repurchase program may be suspended, terminated or modified at any time for any reason. The repurchase program does not obligate the Company to acquire any specific number of shares. Repurchases are subject to SEC regulations as well as certain conditions specified in the plan.

Our Board of Directors authorized the initiation of our regular quarterly cash dividend program in January 2016, and since that time has increased the dividend, to its current quarterly level of $0.42 per share. The declaration and payment of future dividends is subject to the discretion and determination of the Board of Directors and management, based on a variety of factors, and the program may be suspended, terminated or modified at any time for any reason.

As of March 31, 2019, we had $192.3 million of cash and cash equivalents, $132.3 million of which was held in foreign subsidiaries.  See Part II, Item 1A entitled “Risk Factors” of this Report on Form 10-Q for additional discussion of our foreign operations.

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We believe that our current balance of cash, cash generated by our operations, cash repatriation to the United States, and available borrowing capacity under our Credit Facilities will be sufficient to fund our operations, expected capital expenditures, dividend payments, and share repurchases for at least the next twelve months. However, in pursuit of corporate development or other initiatives, we may need to raise additional funds in the future through equity or debt financing, or other arrangements.  Depending on future conditions in the capital and credit markets, we could encounter difficulty securing additional financing in the type or amount necessary to pursue these objectives.

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OFF-BALANCE SHEET ARRANGEMENTS

At March 31, 2019 and September 30, 2018, we did not have any unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or special purpose entities, which might have been established for the purpose of facilitating off-balance sheet arrangements.

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TABULAR DISCLOSURE OF CONTRACTUAL OBLIGATIONS

The following summarizes our contractual obligations at March 31, 2019, and the effect such obligations are expected to have on our liquidity and cash flows in future periods.

CONTRACTUAL OBLIGATIONS			Less Than		1-3		3-5		After 5
(In millions)	Total		1 Year		Years		Years		Years
Purchase obligations	$	60.2	$	56.8	$	3.4	$	-	$	-
Operating leases		35.4		7.1		8.8		7.0		12.5
Severance agreements		3.1		3.1		-		-		-
Debt		1,020.0		13.3		21.3		21.3		964.1
Interest expense and fees		242.8		52.2		72.5		64.1		54.0
Other long-term liabilities *		17.6		0.4		1.5		0.7		15.0
Total contractual obligations	$	$ 1,379.1	$	$ 132.9	$	$ 107.5	$	$ 93.1	$	$ 1,045.6

* We have excluded $150 million in deferred tax liabilities from the other long-term liability amounts presented, as the amount and timing of payments to be settled in cash are not known.   We have also excluded $7.6 million related to the fair value of our interest rate swap, and $1.0 million in deferred rent as the rent payments are included in the table above under the caption “Operating leases.”

We have been operating under a multi-year supply agreement with Cabot Corporation, which is not a related party and has not been one since 2002, for the purchase of fumed silica, the current term of which runs through December 31, 2019.  Purchase obligations include an aggregate amount of $11.1 million of contractual commitments related to our Cabot Corporation supply agreement for fumed silica.

Interest payments on long-term debt reflect interest rates in effect at December 31, 2018. The interest payments reflect variable LIBOR-based rates currently in effect on $274 million of our outstanding debt, and fixed rates on $746 million of outstanding debt for which we have implemented an interest rate swap. Commitment fees are based on our estimated consolidated leverage ratio in future periods. See Note 10 of the Notes to the Consolidated Financial Statements of this Report on Form 10-Q for additional information regarding our long-term debt.

Refer to Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of Part II of our Annual Report on Form 10-K for the fiscal year ended September 30, 2018, for additional information regarding our contractual obligations.

SUPPLEMENTAL UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION

The following Unaudited Pro Forma Condensed Combined Financial Information is presented to illustrate the estimated effects of the company’s acquisition of KMG (the “Acquisition”), which was consummated on November 15, 2018 (the “Acquisition Date”), based on the historical results of operations of Cabot Microelectronics and KMG. See Note 1, Background and Basis of Presentation, and Note 4, Business Combination, to the consolidated financial statements for additional information on the Acquisition. The following Unaudited Pro Forma Condensed Combined Statements of Income for the three and six months ended March 31, 2019 and March 31, 2018 are based on the historical financial statements of Cabot Microelectronics and KMG after giving effect to the Acquisition, and the assumptions and adjustments described in the accompanying notes to these Unaudited Pro Forma Condensed Combined Statements of Income.

The historical Cabot Microelectronics Consolidated Statements of Income for the three and six months ended March 31, 2019 and March 31, 2018 were derived from the consolidated financial statements included elsewhere in this Form 10-Q. The historical KMG Consolidated Statements of Income for the six months ended March 31, 2019, as well as the historical KMG Consolidated Statements of Income for the three and six months ended March 31, 2018 includes information derived from KMG’s books and records. Prior to the Acquisition, KMG was on a July 31st fiscal year end reporting cycle. These pro forma financials include actual KMG’s pre-acquisition results with the months aligned to Cabot Microelectronics’ fiscal periods, and therefore, they do not align with consolidated financial statements included in KMG’s Quarterly Reports on Form 10-Q.

The Unaudited Pro Forma Condensed Combined Statements of Income are presented as if the Acquisition had been consummated on October 1, 2017, the first business day of our 2018 fiscal year, and combine the historical results of Cabot Microelectronics and KMG, which is consistent with internal management reporting, after primarily giving effect to the following assumptions and adjustments:

• Application of the acquisition method of accounting;

• Elimination of transaction costs incurred in connection with the Acquisition;

• Adjustments to reflect the new financing arrangements entered into and legacy financing arrangements retired in connection with the Acquisition;

• The exchange of 0.2000 share(s) of Cabot Microelectronics common stock for each share of KMG common stock; and

• Conformance of accounting policies.

The Unaudited Pro Forma Condensed Combined Financial Information was prepared using the acquisition method of accounting, which requires, among other things, that assets acquired and liabilities assumed in a business combination be recognized at their fair values as of the completion of the acquisition. We utilized estimated fair values at the Acquisition Date to allocate the total consideration exchanged to the net tangible and intangible assets acquired and liabilities assumed. This allocation was initially completed as of November 15, 2018.  The allocation may be adjusted for up to one-year post closing.

The Unaudited Pro Forma Condensed Combined financial information has been prepared on the basis of SEC Regulation S-X Article 11 and is not necessarily indicative of the results of operations that would have been realized had the transactions been completed as of the dates indicated, nor are they meant to be indicative of our anticipated combined future results. In addition, the accompanying Unaudited Pro Forma Condensed Combined Statements of Income do not reflect any additional anticipated synergies, operating efficiencies, cost savings, or any integration costs that may result from the Acquisition.

The historical consolidated financial information has been adjusted in the accompanying Unaudited Pro Forma Condensed Combined Statements of Income to give effect to unaudited pro forma events that are (1) directly attributable to the transaction, (2) factually supportable and (3) are expected to have a continuing impact on the results of operations of the combined company. As a result, under SEC Regulation S-X Article 11, certain non-recurring expenses such as deal costs and compensation expenses related to severance or accelerated stock compensation and certain recurring historical KMG expenses related to depreciation, amortization, financing costs and costs of sales have been adjusted as if the Acquisition had occurred on October 1, 2017. Certain non-cash costs related to the fair value step-up of inventory are eliminated from pro forma results in the periods presented. In contrast, under the ASC 805 presentation in Note 4, Business Combination, to the consolidated financial statements, these expenses are required to be included in prior year pro forma results.

The Unaudited Pro Forma Condensed Combined Financial Information, including the related notes included herein, should be read in conjunction with Cabot Microelectronics’ Current Report on Form 8-K/A filed on January 30, 2019, as well as our consolidated financial statements included in this Form 10-Q and the historical consolidated financial statements and related notes of Cabot Microelectronics and KMG, which are available to the public at the SEC’s website at www.sec.gov.

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CABOT MICROELECTRONICS CORPORATION

Unaudited Pro Forma Condensed Combined Statement of Income

For the Three and Six Months Ended March 31, 2019 and March 31, 2018

(in thousands, except per share data)

	Three Months Ended March 31,						Six Months Ended March 31,
	2019			2018			2019			2018
Revenue	$	265,391		$	259,372		$	549,147		$	512,105
Cost of sales		145,995			147,727			301,223			290,645
Gross profit		119,396			111,645			247,924			221,460
Operating expenses:
Research, development and technical		12,778			13,368			26,818			25,519
Selling, general and administrative expenses		53,653			50,584			110,116			100,969
Total operating expenses		66,431			63,952			136,934			126,488
Operating income		52,965			47,693			110,990			94,972
Interest expense		13,409			14,651			26,852			29,293
Interest income		568			1,157			1,638			2,110
Other income (expense), net		(1,014	)		(688	)		(2,683	)		(1,286	)
Income before income taxes		39,110			33,511			83,093			66,503
Provision for income taxes		11,054			5,562			15,406			31,522
Net income	$	28,056		$	27,949		$	67,687		$	34,981
Basic earnings per share	$	0.97		$	0.97		$	2.34		$	1.22
Weighted average basic shares outstanding		28,998			28,830			28,884			28,711
Diluted earnings per share	$	0.95		$	0.95		$	2.30		$	1.19
Weighted average diluted shares outstanding		29,479			29,398			29,425			29,313

44

CABOT MICROELECTRONICS CORPORATION

Unaudited Pro Forma Condensed Combined Statement of Income

For the Three Months Ended March 31, 2019

(in thousands, except per share data)

	Cabot Microelectronics
	Three Months Ended March 31, 2019			Pro FormaAdjustments (1)			Pro FormaCombined
Revenue	$	265,391		$	-		$	265,391
Cost of sales		150,571			(4,576	)		145,995
Gross profit		114,820			4,576			119,396
Operating expenses:
Research, development and technical		12,778			-			12,778
Selling, general and administrative expenses		50,328			3,325			53,653
Total operating expenses		63,106			3,325			66,431
Operating income		51,714			1,251			52,965
Interest expense		13,331			78			13,409
Interest income		568			-			568
Other income (expense), net		(1,014	)		-			(1,014	)
Income before income taxes		37,937			1,173			39,110
Provision for income taxes		10,800			254			11,054
Net income	$	27,137			919		$	28,056
Basic earnings per share	$	0.94					$	0.97
Weighted average basic shares outstanding		28,998						28,998
Diluted earnings per share	$	0.92					$	0.95
Weighted average diluted shares outstanding		29,479						29,479

¹ Pro forma adjustments are related to non-recurring items directly attributable to the transaction as well as recurring differences related to depreciation, amortization or financing costs that were included as if the companies were combined as of October 1, 2017.

45

CABOT MICROELECTRONICS CORPORATION

Unaudited Pro Forma Condensed Combined Statement of Income

For the Six Months Ended March 31, 2019

(in thousands, except per share data)

	Cabot Microelectronics (1)			KMG Chemicals (2)
	Six Months Ended March 31, 2019			October 1, 2018 to November 14, 2018			Presentation Reclassification (3)			Pro FormaAdjustments (4)			Pro FormaCombined
Revenue	$	487,169		$	61,978		$	-		$	-		$	549,147
Cost of sales		273,016			36,534			4,741			(13,068	)		301,223
Gross profit		214,153			25,444			(4,741	)		13,068			247,924
Operating expenses:
Distribution expenses		-			4,741			(4,741	)		-			-
Research, development and technical		26,818			-			-			-			26,818
Selling, general and administrative expenses		111,456			40,504			-			(41,844	)		110,116
Amortization of intangibles		-			1,943			-			(1,943	)		-
Total operating expenses		138,274			47,188			(4,741	)		(43,787	)		136,934
Operating income		75,879			(21,744	)		-			56,855			110,990
Interest expense		20,221			8,537			-			(1,906	)		26,852
Interest income		1,587			51			-			-			1,638
Derivative fair value gain		-			567			-			(567	)		-
Other income (expense), net		(2,425	)		(258	)		-			-			(2,683	)
Income before income taxes		54,820			(29,921	)		-			58,194			83,093
Provision for income taxes (benefit)		14,240			(5,522	)		-			6,688			15,406
Net income	$	40,580		$	(24,399	)	$	-		$	51,506		$	67,687
Basic earnings per share	$	1.45											$	2.34
Weighted average basic shares outstanding		28,066												28,884
Diluted earnings per share	$	1.42											$	2.30
Weighted average diluted shares outstanding		28,607												29,425

¹ Includes heritage Cabot Microelectronics from October 1, 2018 to March 31, 2019 and heritage KMG from November 15, 2018 to March 31, 2019. On November 15, 2018 the Acquisition was completed and actual combined company results are included.

² Heritage KMG results that occurred prior to the Acquisition on  November 15, 2018

³ Represents the reclassification of KMG distribution expenses from operating expenses to cost of sales, in order to conform with Cabot Microelectronics’ accounting policies.

⁴ Certain pro forma adjustments related to depreciation, amortization, financing costs and costs of sales have been made for the October 1, 2018 to March 31, 2019 period assuming that the Acquisition occurred on October 1, 2017. Additionally, nonrecurring pro forma adjustments have been made for deal costs, compensation expenses related to severance or accelerated stock compensation, and the fair value step-up of inventory directly attributable throughout the six month period.

46

CABOT MICROELECTRONICS CORPORATION

Unaudited Pro Forma Condensed Combined Statement of Income

For the Three Months Ended March 31, 2018

(in thousands, except per share data)

	Cabot Microelectronics			KMG Chemicals
	Three Months Ended March 31, 2018			Three Months Ended March 31, 2018			Presentation Reclassification (1)			Pro FormaAdjustments (2)			Pro FormaCombined
Revenue	$	142,978		$	116,394		$	-		$	-		$	259,372
Cost of sales		67,933			67,496			8,932			3,366			147,727
Gross profit		75,045			48,898			(8,932	)		(2,950	)		111,645
Operating expenses:
Distribution expenses		-			8,932			(8,932	)		-			-
Research, development and technical		13,368			-			-			-			13,368
Selling, general and administrative expenses		24,589			14,660			-			11,375			50,584
Amortization of intangibles		-			3,870			-			(3,870	)		-
Total operating expenses		37,957			27,422			(8,932	)		7,505			63,952
Operating income		37,088			21,476			-			(10,871	)		47,693
Interest expense		1,158			4,236			-			9,257			14,651
Interest income		1,156			1			-			-			1,157
Loss on the extinguishment of debt		-			1,984			-			(1,984	)		-
Derivative fair value gain		-			3,024			-			(3024	)		-
Other income (expense), net		(94	)		(594	)		-			-			(688	)
Income before income taxes		36,992			17,687			-			(21,168	)		33,511
Provision for income taxes (benefit)		7,255			3,264			-			(4,957	)		(5,562	)
Net income	$	29,737		$	14,423		$	-		$	(16,211	)	$	27,949
Basic earnings per share	$	1.16		$	0.93								$	0.97
Weighted average basic shares outstanding		25,593			15,495									28,830
Diluted earnings per share	$	1.14		$	0.91								$	0.95
Weighted average diluted shares outstanding		26,161			15,903									29,398

¹ Represents the reclassification of KMG distribution expenses from operating expenses to cost of sales, in order to conform with Cabot Microelectronics’ accounting policies.

² Pro forma adjustments are related to non-recurring items directly attributable to the transaction as well as recurring differences related to depreciation, amortization or financing costs that were included as if the companies were combined as of October 1, 2017.

47

CABOT MICROELECTRONICS CORPORATION

Unaudited Pro Forma Condensed Combined Statement of Operations

For the Six Months Ended March 31, 2018

(in thousands, except per share data)

	Cabot Microelectronics			KMG Chemicals
	Six Months Ended March 31, 2018			Six Months Ended March 31, 2018			Presentation Reclassification (1)			Pro Forma Adjustments (2)			Pro FormaCombined
Revenue	$	282,957		$	229,148		$	-		$	-		$	512,105
Cost of sales		133,898			132,218			17,675			6,854			290,645
Gross profit		149,059			96,930			(17,675	)		(6,854	)		221,460
Operating expenses:
Distribution expenses		-			17,675			(17,675	)		-			-
Research, development and technical		25,519			-			-			-			25,519
Selling, general and administrative expenses		49,340			28,780			-			22,849			100,969
Amortization of intangibles		-			6,972			-			(6,972	)		-
Total operating expenses		74,859			53,427			(17,675	)		15,877			126,488
Operating income		74,200			43,503			-			(22,731	)		94,972
Interest expense		2,290			10,537			-			16,466			29,293
Interest income		2,107			3			-			-			2,110
Loss on the extinguishment of debt		-			6,309			-			(6,309	)		-
Derivative fair value gain		-			3,882			-			(3,882	)		-
Other income (expense), net		(373	)		(913	)		-			-			(1,286	)
Income before income taxes		73,644			29,629			-			(36,770	)		66,503
Provision for income taxes (benefit)		46,990			(6,858	)		-			(8,610	)		31,522
Net income	$	26,654		$	36,487		$	-		$	(28,160	)	$	34,981
Basic earnings per share	$	1.05		$	2.62								$	1.22
Weighted average basic shares outstanding		25,474			13,923									28,711
Diluted earnings per share	$	1.02		$	2.55								$	1.19
Weighted average diluted shares outstanding		26,076			14,285									29,313

¹ Represents the reclassification of KMG distribution expenses from operating expenses to cost of sales, in order to conform with Cabot Microelectronics’ accounting policies.

²  Pro forma adjustments are related to non-recurring items directly attributable to the transaction as well as recurring differences related to depreciation, amortization or financing costs that were included as if the companies were combined as of October 1, 2017.

48

CABOT MICROELECTRONICS CORPORATION

Summary of Pro Forma Adjustments

(in thousands, except per share data)

	Three Months Ended March 31, 2019			Three Months Ended March 31, 2018			Six Months Ended March 31, 2019			Six Months Ended March 31, 2018
Impact to cost of sales:
Depreciation and amortization, net(a)	$	(10	)	$	3,366		$	1,759		$	6,854
Inventory step-up(b)		(4,566	)		-			(14,827	)		-
Impact to cost of sales	$	(4,576	)	$	3,366		$	(13,068	)	$	6,854
Impact to operating expense:
Depreciation and amortization step up(a)		5,469			13,268			17,582			26,564
Compensation expense(c)		(935	)		(1,893	)		(36,640	)		(3,715	)
Deal costs(d)		(1,209	)		-			(22,786	)		-
Historical KMG amortization in other operating expenses removal(a)		-			(3,870	)		(1,943	)		(6,972	)
Impact to operating expense	$	3,325		$	7,505		$	(43,787	)	$	15,877
Impact to other expense:
Loss on the extinguishment of debt(e)		-			1,984			-			(6,309	)
Derivative fair value gain(e)		-			(3,024	)		(567	)		3,882
Impact to other expense	$	-		$	(1,040	)	$	(567	)	$	(2,427	)
Impact to interest, net:
Interest expense(f)		78			9,257			(1,906	)		16,466
Interest income(f)		-			-			-			-
Impact to interest	$	78		$	9,257		$	(1,906	)	$	16,466

Adjustments included in the accompanying Unaudited Pro Forma Condensed Combined Statements of Income are as follows:

(a) Depreciation and amortization expense are adjusted by removing depreciation and amortization associated with legacy KMG assets and assigning a pro forma expense based on the fair value of the assets on the date of the Acquisition. Depreciation costs are allocated to costs of sales and selling, general and administrative expenses based on historical KMG allocations. Amortization costs are allocated to costs of sales or selling, general and administrative expense based on the use of the asset, where applicable.

(b) Cost of sales is impacted by increased inventory balance caused by the non-cash impact of the step up to fair value of the inventory. The incremental costs of sales driven by the inventory step-up during the period have been removed.

(c) Directly attributable and non-recurring compensation expense related to the fair value remeasurement of certain equity awards, non-recurring retention expenses and stock award vesting directly attributable to the Acquisition are removed for pro forma purposes. All historical KMG stock-based compensation is removed and the proper vesting schedule for on-going service added as a pro forma adjustment.

(d) The elimination of non-recurring deal costs incurred in connection with the Acquisition.

(e) As a result of the Acquisition, there were non-recurring costs incurred by KMG as a result of retiring old debt. The costs associated with retiring the old debt facility and other financial instruments are removed for pro forma purposes. These instruments were retired as a result of the Acquisition and are not included in the pro forma results, which are presented as if the Acquisition had occurred on October 1, 2017.

(f) Changes in interest expense as a result of financing associated with the Acquisition. The adjustments remove legacy KMG interest costs, including unused revolver fees and adds the costs associated with the new financing facilities as if the Acquisition occurred on October 1, 2017.

We calculated the income tax effect of the pro forma adjustments using a 21.6% and 23.4% tax rate, which represent the weighted average statutory tax rate for six-month period ended March 31, 2019 and year-ended September 30, 2018, respectively.

Additionally, for the 2018 periods presented, we calculated the unaudited pro forma weighted average number of basic shares outstanding by adding the Cabot Microelectronics weighted average number of basic shares outstanding from the share amounts disclosed in the historical Quarterly Report on Form 10-Q to the amount of shares issued in connection with the Acquisition, as if the shares were held for the entire period.

We calculated the unaudited pro forma weighted average number of diluted shares outstanding by adding the number of shares issued in the Acquisition to the amount disclosed in the historical Cabot Microelectronics Quarterly Report on Form 10-Q.

The basic and diluted EPS calculation takes pro forma net income divided by the applicable number of shares outstanding.

49

Cabot Microelectronics Corporation

Reconciliation of Pro Forma and Non-GAAP Adjusted Pro Forma Information

The company reports its financial results in accordance with U.S. GAAP.  However, management believes that certain non-GAAP financial measures that reflect the way that management evaluates the business may provide investors with additional information regarding the company’s results, trends and ongoing performance on a comparable basis.  We refer to these measures “Adjusted Pro Forma”, which begin with Pro Forma results that are prepared in accordance with SEC Regulation S-X Article 11 and are included above.  These results are then adjusted for the following additional items:

• Removal of amortization of acquisition related intangibles, since management believes that these costs are not indicative of the company’s core operating performance.

• Removes the difference between reported GAAP interest expense and Article 11 pro forma interest expense, which is prepared as if the acquisition occurred on October 1, 2017.  This adjustment is made for periods when Cabot Microelectronics owned KMG for the full reporting period.

• Removal of integration expenses, as they are non-recurring in nature.

• Adjustment for U.S. Tax Reform, which represents a significant non-recurring item affecting comparability among periods.

Reconciliations for these items are provided in the tables below.

50

CABOT MICROELECTRONICS CORPORATION

Unaudited Reconciliation of Pro Forma Condensed Combined

Statement of Income to Non-GAAP Adjust Pro Forma Condensed

Combined Statement of Income

For the Three Months Ended March 31, 2019

(in thousands, except per share data)

				Non-GAAP Adjustments
	Pro Forma			Amortization of Acquisition Related Intangibles			Interest Expenses Adjustment			Integration Expenses			Adjusted Pro forma
Revenue	$	265,391		$	-		$	-		$	-		$	265,391
Cost of Sales		145,995			(3,470	)		-			-			142,526
Gross Profit		119,396			3,470			-			-			122,866
Gross Profit, % of Revenue		45.0	%		1.3	%		0.0	%		0.0	%		46.3	%
Operating Expenses
Research, development and technical		12,778			-			-			-			12,778
Selling, general and administrative		53,653			(18,947	)		-			(760	)		33,947
Total Operating Expenses		66,431			(18,947	)		-			(760	)		46,725
Operating Income		52,965			22,416			-			760			76,141
Interest Expense		13,409			-			(78	)		-			13,331
Interest Income		568			-			-			-			568
Other Income (Expense), net		(1,014	)		-			-			-			(1,014	)
Income before income taxes		39,110			22,416			78			760			62,364
Provision for income taxes		11,054			5,337			19			182			16,591
Net Income	$	28,056		$	17,079		$	59		$	578		$	45,773
Diluted Earnings per share	$	0.95		$	0.58		$	-		$	0.02		$	1.55
Weighted Average Diluted Shares Outstanding		29,479			29,479			29,479			29,479			29,479
Depreciation & amortization	$	32,807		$	(22,416	)	$	-		$	-		$	10,391
EBITDA	$	84,758		$	-		$	-		$	760		$	85,518
EBITDA Margin		31.9	%											32.2	%

51

CABOT MICROELECTRONICS CORPORATION

Unaudited Reconciliation of Pro Forma Condensed Combined

Statement of Income to Non-GAAP Adjust Pro Forma Condensed

Combined Statement of Income

For the Six Months Ended March 31, 2019

(in thousands, except per share data)

				Non-GAAP Adjustments
	Pro Forma			Amortization of Acquisition Related Intangibles			Interest Expenses Adjustment			Integration Expenses			Adjusted Pro forma
Revenue	$	549,147		$	-		$	-		$	-		$	549,147
Cost of Sales		301,223			(6,940	)		-			-			294,283
Gross Profit		247,924			6,940			-			-			254,864
Gross Profit, % of Revenue		45.1	%		1.3	%		0.0	%		0.0	%		46.4	%
Operating Expenses
Research, development and technical		26,818			-			-			-			26,818
Selling, general and administrative		110,116			(37,894	)		(2,091	)		-			70,131
Total Operating Expenses		136,934			(37,894	)		(2,091	)		-			96,949
Operating Income		110,990			44,834			2,091			-			157,915
Interest Expense		26,852			-			-			-			26,852
Interest Income		1,638			-			-			-			1,638
Other Income (Expense), net		(2,683	)		-			-			-			(2,683	)
Income before income taxes		83,093			44,834			2,091			-			130,018
Provision for income taxes		15,406			10,673			502			259			26,840
Net Income	$	67,687		$	34,161		$	1,589		$	(259	)	$	103,178
Diluted Earnings per share	$	2.30		$	1.16		$	0.05		$	(0.01	)	$	3.51
Weighted Average Diluted Shares Outstanding		29,425			29,425			29,425			29,425			29,425
Depreciation & amortization	$	65,035		$	(44,834	)	$	-		$	-		$	20,201
EBITDA	$	173,342		$	-		$	2,091		$	-		$	175,433
EBITDA Margin		31.6	%		-			-			-			31.9	%

52

CABOT MICROELECTRONICS CORPORATION

Unaudited Reconciliation of Pro Forma Condensed Combined

Statement of Income to Non-GAAP Adjust Pro Forma Condensed

Combined Statement of Income

For the Three Months Ended March 31, 2018

(in thousands, except per share data)

				Non-GAAP Adjustments
	Pro Forma			Amortization of Acquisition Related Intangibles			U.S. Tax Reform			Adjusted Pro forma
Revenue	$	259,372		$	-		$	-		$	259,372
Cost of Sales		147,727			(3,469	)		-			144,258
Gross Profit		111,645			3,469			-			115,114
Gross Profit, % of Revenue		43.0	%		1.3	%		0.0	%		44.4	%
Operating Expenses
Research, development and technical		13,368			-			-			13,368
Selling, general and administrative		50,584			(13,453	)		-			37,131
Total Operating Expenses		63,952			(13,453	)		-			50,499
Operating Income		47,693			16,922			-			64,615
Interest Expense		14,651			-			-			14,651
Interest Income		1,157			-			-			1,157
Other Income (Expense), net		(688	)		-			-			(688	)
Income before income taxes		33,511			16,922			-			50,433
Provision for income taxes		5,562			4,029			212			9,803
Net Income	$	27,949		$	12,893		$	(212	)	$	40,630
Diluted Earnings per share	$	0.95		$	0.44		$	(0.01	)	$	1.38
Weighted Average Diluted Shares Outstanding		29,398			29,398			29,398			29,398
Depreciation & amortization	$	27,032		$	(16,922	)	$	-		$	10,110
EBITDA	$	$ 74,037		$	-		$	-		$	$ 74,037
EBITDA Margin		28.5	%		-			-			28.5	%

53

CABOT MICROELECTRONICS CORPORATION

Unaudited Reconciliation of Pro Forma Condensed Combined

Statement of Income to Non-GAAP Adjust Pro Forma Condensed

Combined Statement of Income

For the Six Months Ended March 31, 2018

(in thousands, except per share data)

				Non-GAAP Adjustments
	Pro Forma			Amortization of Acquisition Related Intangibles			U.S. Tax Reform			Adjusted Pro forma
Revenue	$	512,105		$	-		$	-		$	512,105
Cost of Sales		290,645			(6,866	)		-			283,779
Gross Profit		221,460			6,866			-			228,326
Gross Profit, % of Revenue		43.2	%		1.3	%		0.0	%		44.6	%
Operating Expenses
Research, development and technical		25,519			-			-			25,519
Selling, general and administrative		100,969			(26,905	)		-			74,064
Total Operating Expenses		126,488			(26,905	)		-			99,583
Operating Income		94,972			33,771			-			128,743
Interest Expense		29,293			-			-			29,293
Interest Income		2,110			-			-			2,110
Other Income (Expense), net		(1,286	)		-			-			(1,286	)
Income before income taxes		66,503			33,771			-			100,274
Provision for income taxes		31,522			8,040			(20,766	)		18,796
Net Income	$	34,981		$	25,731		$	20,766		$	81,479
Diluted Earnings per share	$	1.19		$	0.88		$	0.71		$	2.78
Weighted Average Diluted Shares Outstanding		29,313			29,313			29,313			29,313
Depreciation & amortization	$	53,925		$	(33,771	)	$	-		$	20,154
EBITDA	$	147,611		$	-		$	-		$	147,611
EBITDA Margin		28.8	%		-			-			28.8	%

54

ITEM 3.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

EFFECT OF FOREIGN CURRENCY EXCHANGE RATES AND EXCHANGE RATE RISK MANAGEMENT

We conduct business operations outside of the United States through our foreign operations.  Some of our foreign operations maintain their accounting records in their local currencies.  Consequently, period to period comparability of results of operations is affected by fluctuations in exchange rates.  The primary currencies to which we have exposure are the Korean won, Japanese yen, Euro, Singapore dollar and the New Taiwan dollar.  Approximately 31% of our revenue is transacted in currencies other than the U.S. dollar.  However, we also incur expenses in foreign countries that are transacted in currencies other than the U.S. dollar, which provides a natural hedge and mitigates the exposure on the Consolidated Statements of Income.  We periodically enter into forward contracts in an effort to manage foreign currency exchange exposure on our Consolidated Balance Sheets.  However, we are unlikely to be able to hedge these exposures completely.  We do not enter into forward contracts or other derivative instruments for speculative or trading purposes.

Fluctuations in foreign currencies have not had a material impact on our Consolidated Statements of Income for the six months ended March 31, 2019 and 2018. During the six months ended March 31, 2019, we recorded $1.4 million in foreign currency translation gains, net of tax, that are included in other comprehensive income.  These gains and losses primarily relate to changes in the U.S. dollar value of assets and liabilities denominated in local currencies when these asset and liability amounts are translated at month-end exchange rates.

MARKET RISK AND SENSITIVITY ANALYSIS RELATED TO FOREIGN EXCHANGE RATE RISK

We have performed a sensitivity analysis assuming a hypothetical 10% additional adverse movement in foreign exchange rates.  As of March 31, 2019, the analysis demonstrated that such market movements would not have a material adverse effect on our consolidated financial position, results of operations or cash flows over a one-year period.  Actual gains and losses in the future may differ materially from this analysis based on changes in the timing and amount of foreign currency rate movements and our actual exposures.

55

ITEM 4. CONTROLS AND PROCEDURES

EVALUATION OF DISCLOSURE CONTROLS AND PROCEDURES

Our management, with the participation of our Chief Executive Officer (CEO) and Chief Financial Officer (CFO), has conducted an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended) as of March 31, 2019.  Based on that evaluation, our CEO and CFO have concluded that our disclosure controls and procedures were effective to ensure that information required to be disclosed in our Exchange Act reports is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and to ensure that such information is accumulated and communicated to management, including the CEO and CFO, as appropriate to allow timely decisions regarding required disclosure.

CHANGES IN INTERNAL CONTROL OVER FINANCIAL REPORTING

The Company is in the process of integrating KMG into the Company’s internal control over financial reporting. As a result of these integration activities, certain controls will be evaluated and may be changed. Excluding the Acquisition, there were no changes in the Company’s internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

INHERENT LIMITATIONS ON EFFECTIVENESS OF CONTROLS

Because of inherent limitations, our disclosure controls or our internal control over financial reporting may not prevent all errors and all fraud.  A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met.  Further, the design of a control system must take into account the benefits of controls relative to their costs.  Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company have been detected.  These inherent limitations include possible faulty judgment in decision-making and breakdowns due to a simple error or mistake.  Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the controls.  The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions.  Over time, controls may become inadequate because of changes in conditions, or the degree of compliance with policies or procedures may deteriorate.  Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

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PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

The information set forth in Note 12 “Commitments and Contingencies,” to the consolidated financial statements included in Item 1 of Part I of this Report on Form 10-Q is incorporated herein by reference.

ITEM 1A. RISK FACTORS

RISKS RELATING TO OUR BUSINESS

DEMAND FOR OUR PRODUCTS FLUCTUATES AND OUR BUSINESS MAY BE ADVERSELY AFFECTED BY WORLDWIDE ECONOMIC AND INDUSTRY CONDITIONS

Our business is affected by economic and industry conditions and the majority of our revenue derives from our Electronic Materials segment, which is primarily dependent upon semiconductor demand. With respect to our Electronic Materials segment, historically, semiconductor demand has fluctuated due to economic and industry cycles and seasonal shifts in demand, which can affect our business, causing demand for our electronic materials products to fluctuate. For example, we experienced relatively soft demand conditions in the semiconductor industry during this quarter. Previously, the strengthening of demand conditions in the semiconductor industry we experienced during the second half of fiscal 2016 continued through fiscal 2018, following relatively soft demand conditions during the first half of fiscal 2016. Furthermore, competitive dynamics within the semiconductor industry may impact our business. Our limited visibility to future customer orders makes it difficult for us to predict industry trends. If the global economy or the semiconductor industry weakens, whether in general or as a result of specific factors, such as macroeconomic factors, or unpredictable events such as natural disasters or geopolitical events, we could experience material adverse impacts on our results of operations and financial condition. Some additional factors that may affect demand for our electronic materials products include: demand trends for different types of electronic devices, such as logic versus memory IC devices, or digital versus analog IC devices; the various technology nodes at which those products are manufactured; customers' efficiencies in the use of CMP consumables and/or high-purity process chemicals (“electronic chemicals”); customers' device architectures and specific manufacturing processes; the short order to delivery time for our products; quarter-to-quarter changes in customer order patterns; market share and competitive gains and losses; and pricing changes by us and our competitors.

As to our Performance Materials segment, which is an area of potential continued growth for us, our business may be increasingly impacted by changes in the utilities and/or oil and gas industries.  Volatility in oil and natural gas prices may impact our customers’ activity levels, including production, and spending on our performance materials products and services. Expectations about future prices and price volatility are important in determining future spending levels for customers of our pipeline performance products and services. Historically, worldwide oil and natural gas prices and markets have been volatile, and may continue to be volatile in the future. Prices for oil and natural gas are subject to wide fluctuations in response to relatively minor changes in the supply of and demand for oil and natural gas, market uncertainty and a variety of additional factors that are beyond our control. These factors include, but are not limited to, increases in supplies from U.S. shale production, international political conditions, including uprisings and political unrest, sovereign debt crises, the domestic and foreign supply of oil and natural gas, the level of consumer demand due to economic growth in China, weather conditions, domestic and foreign governmental regulations and taxes, the price and availability of alternative fuels, the health of international economic and credit markets, the ability of the members of the Organization of Petroleum Exporting Countries and other state-controlled oil companies to agree upon and maintain oil price and production controls, and general economic conditions.

Further, adverse global economic and industry conditions could have other negative effects on our Company. For instance, we could experience negative impacts on cash flows due to the inability of our customers to pay their obligations to us, or our production process could be harmed if our suppliers cannot fulfill their obligations to us. We also might have to reduce the carrying value of goodwill and other intangible assets, which could harm our financial position and results of operations.

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WE MAY PURSUE ACQUISITIONS OF, INVESTMENTS IN, AND MERGERS OR STRATEGIC ALLIANCES WITH OTHER ENTITIES, WHICH COULD DISRUPT OUR OPERATIONS AND HARM OUR OPERATING RESULTS IF THEY ARE UNSUCCESSFUL, OR WE MAY ENCOUNTER UNANTICIPATED ISSUES IN IMPLEMENTING THEM

We expect to continue to make investments in technologies, assets and companies, either through acquisitions, mergers, investments or alliances, in order to supplement our organic growth and development efforts. Acquisitions, mergers, and investments, including our acquisitions of KMG, which we completed in November 2018, and NexPlanar, which we completed in October 2015, involve numerous risks, including the following: difficulties and risks in integrating the operations, technologies, products and personnel of acquired companies; difficulties and risks from unanticipated issues arising subsequent to a transaction related to the other entity; potential disruption of relationships with third parties; diversion of management's attention from normal daily operations of the business; increased risk associated with foreign operations; potential difficulties and risks in entering markets in which we have limited or no direct prior experience and where competitors have stronger positions; potential difficulties in operating new businesses with different business models; potential difficulties with regulatory or contract compliance in areas in which we have limited experience; initial dependence on unfamiliar supply chains or relatively small supply partners; insufficient revenues to offset increased expenses associated with acquisitions; potential loss of key employees of the acquired companies; or inability to effectively cooperate and collaborate with our alliance partners.

Further, we may never realize the perceived or anticipated benefits of a business combination or merger with, or asset or other acquisition of, or investments in, other entities. Transactions such as these could have negative effects on our results of operations, in areas such as contingent liabilities, gross margins, amortization charges related to intangible assets and other effects of accounting for the purchases of other business entities. Investments in and acquisitions of technology-related companies or assets are inherently risky because these businesses or assets may never develop, and we may incur losses related to these investments. For example, in fiscal 2016, we recorded $1.0 million of impairment expense related to certain in-process technology, related to the NexPlanar acquisition. In addition, we may be required to impair the carrying value of these acquisitions or investments to reflect other than temporary declines in their value, which could harm our business and results of operations.

The integration of the recently acquired KMG business into our operations is a complex and time-consuming process that may not be successful. Our Company has a limited history of integrating a significant acquisition into its business and the process of integration may produce unforeseen operating difficulties and expenditures. The primary areas of focus for successfully combining the business of KMG with our operations may include, among others: retaining and integrating key employees; realizing synergies; aligning customer and supplier interface across the combined business; integrating enterprise resource planning and other information technology systems; and managing the growth of the combined company. Even if we successfully integrate the business of KMG into our operations, there can be no assurance that we will realize the anticipated benefits of the Acquisition.

WE HAVE A CONCENTRATED PRODUCT RANGE WITHIN EACH OF OUR SEGMENTS AND OUR PRODUCTS MAY BECOME OBSOLETE, OR TECHNOLOGICAL CHANGES MAY REDUCE OR LIMIT INCREASES IN THE CONSUMPTION OF OUR PRODUCTS

Although our product offerings have expanded with the acquisition of KMG, our business remains substantially dependent on products in our Electronic Materials segment, such as CMP slurries, pads and electronic chemicals, which account for the majority of our revenue.  We have identified our Performance Materials segment as another area of potential continued growth and the product offerings in our Performance Materials segment are similarly concentrated.  As such, our business would suffer if these products became obsolete or if consumption of these products decreased. Our success depends on our ability to keep pace with technological changes and advances in the industries in which we operate, particularly the semiconductor industry, and to adapt, improve and customize our products in response to evolving customer needs and industry trends. Since its inception, the semiconductor industry, which is the largest industry in which we operate, has experienced technological changes and advances in the design, manufacture, performance and application of IC devices.  Our customers continually pursue lower cost of ownership and higher quality and performance of materials consumed in their manufacturing processes, including CMP slurries and pads and electronic chemicals, as a means to reduce costs, increase the yield in their manufacturing facilities, and achieve desired performance of the IC devices they produce. We expect these technological changes, and this drive toward lower costs, higher quality and performance and higher yields, will continue in the future. Potential technology developments in the semiconductor industry, as well as our customers' efforts to reduce consumption of CMP consumables, including through use of smaller quantities, could render our products less important to the IC device manufacturing process.

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A SIGNIFICANT AMOUNT OF OUR BUSINESS COMES FROM A LIMITED NUMBER OF LARGE CUSTOMERS AND OUR REVENUE AND PROFITS COULD DECREASE SIGNIFICANTLY IF WE LOST ONE OR MORE OF THESE CUSTOMERS OR BUSINESS FROM THEM

Our customer base is concentrated among a limited number of large customers in each of our segments.  Currently, our principal business is to supply electronic materials primarily to the semiconductor industry. The semiconductor industry has been consolidating as the larger semiconductor manufacturers have generally grown faster than the smaller ones, through business gains, mergers and acquisitions, and strategic alliances. Industry analysts predict that this trend will continue, which means the semiconductor industry will be comprised of fewer and larger participants in the future if their prediction is correct. In addition, our customer base in our pipeline-related businesses is also somewhat concentrated, with large entities predominant, and outside of the United States, these entities frequently are state-owned or sponsored and limited in number per country, as described more above. One or more of these principal customers could stop buying products from us or could substantially reduce the quantity of products purchased from us. Our principal customers also hold considerable purchasing power, which can impact the pricing and terms of sale of our products. Any deferral or significant reduction in the quantity or price of products sold to these principal customers could seriously harm our business, financial condition and results of operations.

In fiscal 2018, our five largest customers accounted for approximately an aggregate 57% of our revenue, with Samsung, Taiwan Semiconductor Manufacturing Company and SK Hynix Inc. accounting for approximately 18%, 12%, and 10%, respectively, of our revenue. 

ANY PROBLEM OR DISRUPTION IN OUR SUPPLY CHAIN, INCLUDING SUPPLY OF OUR MOST IMPORTANT RAW MATERIALS, OR IN OUR ABILITY TO MANUFACTURE OR DELIVER OUR PRODUCTS TO OUR CUSTOMERS, COULD ADVERSELY AFFECT OUR RESULTS OF OPERATIONS

We depend on our supply chain to enable us to meet the demands of our customers. Our supply chain includes the raw materials we use to manufacture our products, our production operations and the means by which we deliver our products to our customers. Our business could be adversely affected by any problem or interruption in the supply of the key raw materials we use in our products, including raw materials that do not meet the stringent quality and consistency requirements of our customers, any problem or interruption that may occur during production or delivery of our products, such as weather-related problems, natural disasters, or geopolitical, trade or labor-related issues, or any difficulty in producing sufficient quantities of our products to meet growing demand from our customers. In particular, severe weather conditions have the potential to adversely affect our operations, damage facilities and increase our costs, and those conditions may also have an indirect effect on our operations by disrupting services provided by service companies or suppliers with whom we have a business relationship.  Additionally, some of our full-time employees are represented by labor unions, workers councils or comparable organizations, particularly in Mexico and Europe. As our current agreements expire, we cannot assure you that new agreements will be reached at the end of each period without union action, or that a new agreement will be reached on terms satisfactory to us. An extended work stoppage, slowdown or other action by our employees could significantly disrupt our business. Future labor contracts may be on terms that result in higher labor costs to us, which also could adversely affect our results of operations. Our supply chain may also be negatively impacted by unanticipated price increases due to supply restrictions beyond the control of our Company or our raw materials suppliers.

We believe it would be difficult to promptly secure alternative sources of key raw materials in the event one of our suppliers becomes unable to supply us with sufficient quantities of raw materials that meet the quality and technical specifications required by us and our customers. In addition, new contract terms, forced production or manufacturing changes, contractual amendments to existing agreements with, or non-performance by, our suppliers, including any significant financial distress our suppliers may suffer, could adversely affect us. Also, if we change the supplier or type of key raw materials we use to make our products, in particular our electronic materials products, or are required to purchase them from a different manufacturer or manufacturing facility or otherwise modify our products, in certain circumstances our customers might have to requalify our products for their manufacturing processes and products. The requalification process could take a significant amount of time and expense to complete and could occupy technical resources of our customers that might otherwise be used to evaluate our new products, thus delaying potential revenue growth, or motivate our customers to consider purchasing products from our competitors, possibly interrupting or reducing our sales of products to these customers, especially sales of our electronic materials products to our semiconductor industry customers.

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OUR BUSINESS COULD BE SERIOUSLY HARMED IF OUR COMPETITORS DEVELOP COMPETITIVE PRODUCTS, OFFER BETTER PRICING, SERVICE OR OTHER TERMS, OR OBTAIN OR ASSERT CERTAIN INTELLECTUAL PROPERTY RIGHTS

Competition from other electronic materials or performance materials manufacturers or any new entrants could seriously harm our business and results of operations, and this competition could continue to increase. Competition has and will likely continue to impact the prices we are able to charge for our products, as well as our overall business. In addition, our competitors could have, obtain or assert intellectual property rights that could affect or restrict our ability to market our existing products and/or to innovate and develop new products, thus increasing our costs of doing business, could attempt to introduce products similar to ours following the expiration of our patents, or could attempt to introduce products that do not fall within the scope of our intellectual property rights.

WE ARE SUBJECT TO RISKS ASSOCIATED WITH OUR FOREIGN OPERATIONS

We currently have operations and a large customer base outside of the United States.  Approximately 87% of our revenue was generated by sales to customers outside of the United States for the full fiscal year ended September 30, 2018. We may encounter risks in doing business in certain foreign countries, including, but not limited to, adverse changes in economic and political conditions, both in foreign locations and in the United States with respect to non-U.S. operations of U.S. businesses like ours, geopolitical and/or trade tensions, fluctuation in exchange rates, changes in international trade requirements and sanctions and/or tariffs that affect our business and that of our customers and suppliers, compliance with a variety of foreign laws and regulations and related audits and investigations, as well as difficulty in enforcing business and customer contracts and agreements, including protection of intellectual property rights. We also may encounter risks that we may not be able to repatriate additional earnings from our foreign operations, derive anticipated tax benefits of our foreign operations or recover the investments made in our foreign operations, whether due to regulatory or policy changes in the U.S. or in the countries outside of the U.S. in which we do business, or other factors.

In particular, China is a fast-developing market for the semiconductor industry, and is an area of potential continued growth for us. As business volume between China and the rest of the world continues to grow, there is risk that geopolitical, regulatory, trade and political matters could adversely affect business for companies like ours based on the complex relationships among China, the United States, and other countries in the Asia Pacific region, which could have a material adverse impact on our business.  In addition, there are risks that the Chinese government may, among other things, require the use of local suppliers, compel companies that do business in China to partner with local companies to conduct business, and, provide incentives to government-backed local customers to buy from local suppliers rather than companies like ours, all of which could adversely impact our business, including our results of operations.

In addition, we have operations and customers located in the United Kingdom. In June 2016, the United Kingdom held a referendum in which voters approved an exit from the European Union (“Brexit”).  In March 2017, the United Kingdom formally notified the European Union of its intention to withdraw, and withdrawal negotiations began in June 2017. The United Kingdom will cease to be a member state when a withdrawal agreement is entered into (such agreement will also require parliamentary approval) or, failing that, two years following the notification of an intention to leave the European Union, unless the European Union (together with the United Kingdom) unanimously decides to extend this period. In March 2018, the European Union announced an agreement in principle to transitional provisions under which most European Union law would remain in force in the United Kingdom until the end of December 2020, however, this transitional period remains subject to the successful conclusion of a final withdrawal agreement between the parties. In the absence of such an agreement, there would be no transitional provisions and a “hard” Brexit would occur. In April 2019, the United Kingdom and European Union agreed that the transitional provisions are extended until October 21, 2019. Although it is unknown what the terms of such an agreement will be, it is possible that there will be greater restrictions on imports and exports between the United Kingdom and European Union countries, a fluctuation in currency exchange rates and increased regulatory complexities. These changes may adversely affect our operations and financial results. While such changes in laws, regulations and conditions have not had a material adverse effect on our business or financial condition to date, we cannot assure you as to the future effect of any such changes.

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BECAUSE WE RELY HEAVILY ON OUR INTELLECTUAL PROPERTY, OUR FAILURE TO ADEQUATELY OBTAIN OR PROTECT IT COULD SERIOUSLY HARM OUR BUSINESS

Protection of intellectual property is particularly important in our industry because we develop complex technical formulas and processes for products that are proprietary in nature and differentiate our products from those of our competitors. Our intellectual property is important to our success and ability to compete. We attempt to protect our intellectual property rights through a combination of patent, trademark, copyright and trade secret laws, as well as employee and third-party nondisclosure and assignment agreements. In addition, we protect our product differentiation through various other means, such as proprietary supply arrangements for certain raw materials, and use of certain manufacturing technologies. Due to our international operations, we pursue protection in different jurisdictions, which may provide varying degrees of protection, and we cannot provide assurance that we can obtain adequate protection in each such jurisdiction.  Our failure to obtain or maintain adequate protection of our intellectual property rights for any reason, including through the patent prosecution process or in the event of litigation related to such intellectual property, could seriously harm our business.  In addition, certain types of intellectual property, such   as patents, expire after a certain period of time, and products protected by our patents then lose such protection, so we refresh our intellectual property portfolio on an ongoing basis through continued innovation, and failure to do so could adversely affect our business. Also, the costs of obtaining or protecting our intellectual property could negatively affect our operating results.

WE ARE SUBJECT TO EXTENSIVE ENVIRONMENTAL LAWS AND REGULATIONS AND MAY INCUR COSTS THAT HAVE AN ADVERSE EFFECT ON OUR FINANCIAL CONDITION AS A RESULT OF VIOLATIONS OF OR LIABILITIES UNDER THEM

Like other companies involved in environmentally sensitive businesses, our operations and properties are subject to extensive and stringent federal, state, local and foreign environmental, health and safety (EHS) laws and regulations, including those concerning, among other things:

•the marketing, sale, use and registration of our chemical products, such as pentachlorophenol (“penta”), which is part of

      wood treatment business in our Performance Materials segment;

•the treatment, storage and disposal of wastes;

•the investigation and remediation of contaminated media including but not limited to soil and groundwater;

•the discharge of effluents into waterways;

•the emission of substances into the air; and

•other matters relating to environmental protection and various health and safety matters.

The United States Environmental Protection Agency (“EPA”) and other federal and state agencies in the United States, as well as comparable agencies in other countries where we have facilities or sell our products, have the authority to promulgate regulations that could have a material adverse impact on our operations. These EHS laws and regulations may require permits for certain types of operations, require the installation of expensive pollution control equipment, place restrictions upon operations or impose substantial liability for pollution and other EHS concerns resulting from our operations. Compliance with EHS laws and regulations has resulted in ongoing costs for us and could restrict our ability to modify or expand our facilities, continue production, require us to install costly pollution control equipment, or incur significant other expenses, including remediation costs. We are currently involved in investigation and remediation activities at certain sites. We have incurred, and expect to continue to incur, significant costs to comply with EHS laws or to address liabilities for contamination resulting from past or present operations. Federal, state and foreign governmental authorities may seek fines and penalties, as well as injunctive relief, for violation of EHS laws and regulations, and could, among other things, impose liability on us to cleanup or mitigate environmental, natural resources or other damages resulting from a release of pesticides, hazardous materials or other chemicals into the environment. We maintain insurance coverage for sudden and accidental environmental damages. We do not believe that insurance coverage for environmental damage that occurs over time is available at a reasonable cost. Also, we do not believe that insurance coverage for the full potential liability that could be caused by sudden and accidental incidences is available at a reasonable cost. Accordingly, we may be subject to an uninsured or under-insured loss in such cases.

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1. The distribution, sale and use of our products is subject to prior governmental approvals and thereafter ongoing governmental regulation: Our products are subject to laws administered by federal, state and foreign governments, including regulations requiring registration, approval and labeling. The labeling requirements restrict the use and type of application for our products. More stringent restrictions could make our products less desirable which would adversely affect our sales and profitability. All venues where our penta products are used also require registration prior to marketing or use.

Governmental regulatory authorities have required, and may require in the future, that certain scientific testing and data production be provided on our products. Under the Federal Insecticide, Fungicide and Rodenticide Act (“FIFRA”), EPA requires registrants to submit a wide range of scientific data to support U.S. registrations. This requirement significantly increases our operating expenses, and we expect those expenses will continue in the future. Because scientific analyses are constantly improving, we cannot determine with certainty whether or not new or additional tests may be required by regulatory authorities. While good laboratory practice standards specify the minimum practices and procedures that must be followed in order to ensure the quality and integrity of data related to these tests submitted to the EPA, there can be no assurance that the EPA will not request certain tests or studies be repeated. In addition, more stringent legislation or requirements may be imposed in the future.  Recent changes to the Toxic Substances Control Act (“TSCA”) could result in increased regulation and required testing of chemicals we manufacture and could increase the costs of compliance for our operations. We can provide no assurance that the cost of such compliance will not adversely affect our profitability. Our products could also be subject to other future regulatory action that may result in restricting or completely banning their use which could have an adverse effect on our performance and results of operations.

2. The Registration, Evaluation and Authorization of Chemicals (“REACH”) legislation may affect our ability to manufacture and sell certain products in the European Union: REACH requires chemical manufacturers and importers in the European Union to prove the safety of their products. We were required to pre-register certain products and file comprehensive reports, including testing data, on each chemical substance, and perform chemical safety assessments. Additionally, substances of high concern are subject to an authorization process. Authorization may result in restrictions on certain uses of products or even prohibitions on the manufacture or importation of products. The full registration requirements of REACH are phased in over several years. We will incur additional expense to cause the registration of our products under these regulations. REACH may also affect our ability to import, manufacture and sell certain products in the European Union.  In addition, other countries and regions of the world already have or may adopt legislation similar to REACH that affect our business, affect our ability to import, manufacture or sell certain products in these jurisdictions, and have required or will require us to incur increased costs.

3. The classification of pentachlorophenol as a Persistent Organic Pollutant (“POP”) under the Stockholm Convention may adversely affect our ability to manufacture or sell our penta products: The Conference of the Parties (“COP”) accepted the recommendation of the United Nations Persistent Organic Pollutant Review Committee that the use of penta should be banned except that its use for the treatment of utility poles and crossarms could continue for an extended period of five to ten years. We supply penta to industrial customers who use it primarily to treat utility poles and crossarms. The U.S. is not bound by the determination of the COP because it did not ratify the Stockholm Convention treaty. Canada and Mexico are governed by the treaty. Our sole penta manufacturing facility is located in Matamoros, Mexico. As a result of the classification of penta as a POP, the Mexican government has requested that we relocate our penta manufacturing facility. We are in the process of identifying a potential site in the U.S. for such relocation. No assurance can be given that we will not incur significant expenditures in connection with such relocation, that we will find an adequate location within the required timeframe, or that the ultimate action of the COP will not adversely impact on our financial condition and results of operation.

4. If our products are not re-registered by the EPA or are re-registered subject to new restrictions, our ability to sell our products may be curtailed or significantly limited: Our penta product registrations are under continuous review by the EPA under FIFRA. We have submitted and will submit a wide range of scientific data to support our U.S. registrations. To satisfy the registration review, we are required to demonstrate, among other things, that our products will not cause unreasonable adverse effects on human health or the environment when used according to approved label directions. In September 2008, the EPA announced that it had determined that penta was eligible for re-registration, but the EPA proposed new restrictions on the use of penta that have required our customers to incur substantial additional costs and to revise certain operating procedures. In December 2014, the EPA issued a registration review work plan that required penta registrants to provide additional research and testing data respecting certain potential risks to human health or the environment as a further condition to continued registration. We have been conducting required testing. but we cannot tell you when or if the EPA will issue a final decision concluding that the conditions of re-registration for our penta products and all additional testing requirements have been satisfied. We cannot assure you that our products will not be subject to use or labeling restrictions that may have an adverse effect on our financial position and results of operations. The failure of our current or future-acquired products to be re-registered, to satisfy the registration review by the EPA, or the imposition of new use, labeling or other restrictions in connection with re-registration could have an adverse effect on our financial condition and results of operations.

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5. Our use of hazardous materials exposes us to potential liabilities: Our manufacturing and distribution of chemical products, such as our electronic chemicals, involves the controlled use of hazardous materials. Our operations, therefore, are subject to various associated risks, including chemical spills, discharges or releases of toxic or hazardous substances or gases, fires, mechanical failure, storage facility leaks and similar events. Our suppliers are subject to similar risks that may adversely impact the availability of raw materials. While we adapt our manufacturing and distribution processes to the environmental control standards of regulatory authorities, we cannot completely eliminate the risk of accidental contamination or injury from hazardous or regulated materials, including injury of our employees, individuals who handle our products or goods treated with our products, or others who claim to have been exposed to our products, nor can we completely eliminate the unanticipated interruption or suspension of operations at our facilities due to such events. We may be held liable for significant damages or fines in the event of contamination or injury, and such assessed damages or fines could have an adverse effect on our financial performance and results of operations.

FUTURE CLIMATE CHANGE REGULATION COULD RESULT IN INCREASED OPERATING COSTS AND REDUCED DEMAND FOR OUR PRODUCTS

Although the U.S. has not ratified the Kyoto Protocol, a number of federal laws related to “greenhouse gas” or “GHG” emissions have been considered by Congress. Because of the lack of any comprehensive legislation program addressing GHGs, the EPA is using its existing regulatory authority to promulgate regulations requiring reduction in GHG emissions from various categories of sources, such as when a permit is required due to emissions of other pollutants. In addition, various state, local and regional regulations and initiatives have been enacted or are being considered related to GHGs.

Member States of the European Union each have an overall cap on emissions, which are approved by the European Commission, and implement the EU Emissions Trading Directive as a commitment to the Kyoto Protocol. Under this Directive, organizations apply to the Member State for an allowance of GHG emissions. These allowances are tradable so as to enable companies that manage to reduce their GHG emissions to sell their excess allowances to companies that are not reaching their emissions objectives. Failure to purchase sufficient allowances will require the purchase of allowances at a current market price.

Any laws or regulations that may be adopted to restrict or reduce emissions of GHGs could cause an increase to our raw material costs, require us to incur increased operating costs, and have an adverse effect on demand for our products and our financial performance and results for our business.

OUR PRODUCTS MAY BE RENDERED OBSOLETE OR LESS ATTRACTIVE BY CHANGES IN INDUSTRY REQUIREMENTS OR BY SUPPLY-CHAIN DRIVEN PRESSURES TO SHIFT TO ENVIRONMENTALLY PREFERABLE ALTERNATIVES

Changes in regulatory, legislative and industry requirements, or changes driven by supply-chain pressures, may shift current customers away from products using penta or certain of our other products and toward alternative products that are believed to have fewer environmental effects. The EPA, foreign and state regulators, local governments, private environmental advocacy organizations and a number of large industrial companies have proposed or adopted policies designed to decrease the use of a variety of chemicals, including penta and others included in certain of our products. Our ability to anticipate changes in regulatory, legislative, and industry requirements, or changes driven by supply-chain pressures, affects our ability to remain competitive. Further, we may not be able to comply with changed or new regulatory or industrial standards that may be necessary for us to remain competitive.

We cannot assure you that the EPA, foreign and state regulators or local governments will not restrict the uses of penta or certain of our other products or ban the use of one or more of these products.  Similarly, companies who use our products may decide to reduce significantly or cease the use of our products voluntarily. As a result, our products may become obsolete or less attractive to our customers.

OUR INABILITY TO ATTRACT AND RETAIN KEY PERSONNEL COULD CAUSE OUR BUSINESS TO SUFFER

We utilize and rely upon a global workforce. If we fail to attract and retain the necessary managerial, technical and customer support personnel, our business and our ability to maintain existing and obtain new customers, develop new products and provide acceptable levels of customer service could suffer. We compete worldwide with other industry participants for qualified personnel, particularly those with significant experience in the semiconductor industry. The loss of services of key employees, or our inability to obtain or maintain visas or other travel or residency documents on their behalf with respect to our business needs, could harm our business and results of operations. Periodically, we engage in succession planning for our key employees, and our Board of Directors reviews succession planning for our executive officers, including our chief executive officer, on an annual basis.

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BECAUSE WE HAVE LIMITED EXPERIENCE IN BUSINESS AREAS OUTSIDE OF ELECTRONIC MATERIALS AND PERFORMANCE MATERIALS, EXPANSION OF OUR BUSINESS INTO OTHER PRODUCTS AND APPLICATIONS MAY NOT BE SUCCESSFUL

An element of our strategy has been to leverage our customer relationships, technological expertise and other capabilities and competencies to expand our business.  For example, we have made acquisitions to expand beyond CMP consumables into other electronic materials product areas. In addition, in our Engineered Surface Finishes business, we have been pursuing other surface modification applications. Expanding our business into new product areas could involve technologies, production processes and business models in which we have limited experience, and we may not be able to develop and produce products or provide services that satisfy customers' needs, or we may be unable to keep pace with technological or other developments. Or, we may decide that we no longer wish to pursue these new business initiatives. Also, our competitors may have or obtain intellectual property rights that could restrict our ability to market our existing products and/or to innovate and develop new products.

TAX INCREASES OR CHANGES IN TAX RULES MAY ADVERSELY AFFECT OUR FINANCIAL RESULTS

As a company conducting business on a global basis, we are exposed, both directly and indirectly, to effects of changes in United States, state, local and foreign tax rules. In December 2017, comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the "Tax Act") was enacted in the United States. Known and certain estimated effects based upon current interpretation of the Tax Act have been incorporated into our financial results. As additional clarification and implementation guidance is issued on the Tax Act, it may be necessary to adjust our income tax estimates.  Adjustments to income tax amounts could be material to our results of operations and cash flows. In addition, there is a risk that state or foreign jurisdictions may amend their tax laws in response to the Tax Act, which could have a material impact on our future results of operations and cash flows.

CERTAIN CRITICAL INFORMATION SYSTEMS COULD BE SUSCEPTIBLE TO CYBERSECURITY AND OTHER THREATS

We maintain and rely upon certain critical information systems for the effective operation of our business. These information systems include, but are not limited to, telecommunications, the Internet, our corporate intranet, various computer hardware and software applications, network communications, and email. These information systems may be owned and maintained by us, our outsourced providers, or third parties such as vendors, contractors, and Cloud providers. All of these information systems are subject to disruption, breach or failure from various sources including, but not limited to, attacks, degradation, and failures resulting from potential sources, including viruses, malware, denial of service, destructive or inadequate code, power failures, and physical damage. Confidential and/or sensitive information stored on these information systems, or transmitted to or from Cloud storage, could be intentionally or unintentionally compromised, lost, and/or stolen. While we have implemented security procedures and virus protection software, intrusion prevention systems, access control, and emergency recovery processes to mitigate risks like these with respect to information systems that are under our control, they are not fail-safe and may be subject to breaches. Further, we cannot assure that third parties upon whom we rely for various IT services will maintain sufficient vigilance and controls over their systems. Our inability to use or access these information systems at critical points in time, or unauthorized releases of personal or confidential information, could unfavorably impact the timely and efficient operation of our business, including our results of operations, and our reputation, as well as our relationships with our employees or other individuals whose information may have been affected by such cybersecurity incidents.

In addition, regulatory authorities have increased their focus on how companies collect, process, use, store, share and transmit personal data. New privacy security laws and regulations, including the United Kingdom's Data Protection Act 2018 and the European Union General Data Protection Regulation 2016 that became effective May 2018, among others, pose increasingly complex compliance challenges, which may increase compliance costs, and any failure to comply with data privacy laws and regulations could result in significant penalties.

64

OUR ABILITY TO RAISE CAPITAL IN THE FUTURE MAY BE LIMITED, WHICH COULD PREVENT US FROM GROWING, AND OUR EXISTING CREDIT AGREEMENT COULD RESTRICT OUR BUSINESS ACTIVITIES

We may in the future be required to raise capital through public or private financing or other arrangements.Such financing may not be available on acceptable terms, or at all, and our failure to raise capital when needed couldharm our business. Our Credit Agreement contains financial and other covenants that may restrict our business activities or our ability to execute our strategic objectives, and our failure to comply with these covenants could result in a default under our Credit Agreement. Furthermore, additional equity financing may dilute the interests of our common stockholders, and debt financing, if available, may involve restrictive covenants that could further restrict our business activities or our ability to execute our strategic objectives and could reduce our profitability. If we raise or borrow funds on acceptable terms, we may not be able to grow our business or respond to competitive pressures.

In addition, borrowings under our Credit Facilities generally bear interest based on (a) a London Inter-bank Offered Rate (“LIBOR”), subject to a 0.00% floor, or (b) a base rate, in each case plus an applicable margin of, in the case of borrowings under the Term Loan Facility, 2.25% for LIBOR loans and 1.25% for base rate loans and, in the case of borrowings under the Revolving Credit Facility, initially, 1.50% for LIBOR loans and 0.50% for base rate loans. On July 27, 2017, the Financial Conduct Authority (the authority that regulates LIBOR) announced that it intends to stop compelling banks to submit rates for the calculation of LIBOR after 2021, and it is unclear whether new methods of calculating LIBOR will be established. If LIBOR ceases to exist after 2021, any calculation of interest based upon the Alternate Base Rate (or any comparable or replacement formulation), may result in higher interest rates. To the extent that these interest rates increase, our interest expense will increase, which could adversely affect our financial condition, operating results and cash flows.

RISKS RELATING TO THE MARKET FOR OUR COMMON STOCK

THE MARKET PRICE MAY FLUCTUATE SIGNIFICANTLY AND RAPIDLY

The market price of our common stock has fluctuated and could continue to fluctuate significantly as a result of factors such as: economic, geopolitical, political and stock market conditions generally and specifically as they may impact participants in the semiconductor and related industries; changes in financial estimates and recommendations by securities analysts who follow our stock; earnings and other announcements, and changes in market evaluations, by securities analysts, investors, market participants or others, of or related to, us or participants in the semiconductor and related industries; changes in business, trade or regulatory conditions affecting us or participants in the semiconductor and related industries; announcements or implementation by us, our competitors, or our customers of technological innovations, new products or different business strategies; changes in our capital deployment strategy, issuances of shares of our capital stock or entering into a business combination or other strategic transaction; and trading volume of our common stock.

ANTI-TAKEOVER PROVISIONS UNDER OUR CERTIFICATE OF INCORPORATION AND BYLAWS MAY DISCOURAGE THIRD PARTIES FROM MAKING AN UNSOLICITED BID FOR OUR COMPANY

Our certificate of incorporation and bylaws, and various provisions of the Delaware General Corporation Law may make it more difficult or expensive to effect a change in control of our Company. For instance, our amended and restated certificate of incorporation provides for the division of our Board of Directors into three classes as nearly equal in size as possible with staggered three-year terms.

We have adopted change in control arrangements covering our executive officers and other key employees. These arrangements provide for a cash severance payment, continued medical benefits and other ancillary payments and benefits upon termination of service of a covered employee's employment following a change in control, which may make it more expensive to acquire our Company.

65

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

ISSUER PURCHASES OF EQUITY SECURITIES

In January 2016, our Board of Directors authorized an increase in the amount available under our share repurchase program to $150.0 million.  As of March 31, 2019, $81.3 million remained outstanding under our share repurchase program.  We did not repurchase any shares under this program during the first two quarters of fiscal 2019.  The manner in which the Company repurchases its shares is discussed in Part I, Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations, under the heading “Liquidity and Capital Resources”, of this Report on Form 10-Q.  To date, we have funded share purchases under our share repurchase program from our available cash balance, and anticipate we will continue to do so.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

Not applicable.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

66

ITEM 6. EXHIBITS

The exhibit numbers in the following list correspond to the number assigned to such exhibits in the Exhibit Table of Item 601 of Regulation S-K:

Exhibit Number	Description
31.1	Certification of Chief Executive Officer pursuant to Rule 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of Chief Financial Officer pursuant to Rule 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certification 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
101.CAL	XBRL Taxonomy Extension Calculation Linkbase
101.DEF	XBRL Taxonomy Extension Definition Linkbase
101.LAB	XBRL Taxonomy Extension Label Linkbase
101.PRE	XBRL Taxonomy Extension Presentation Linkbase

67

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.

		CABOT MICROELECTRONICS CORPORATION
		[Registrant]
Date: May 10, 2019	By:	/s/ SCOTT D. BEAMER
		Scott D. Beamer
		Vice President and Chief Financial Officer
		[Principal Financial Officer]
Date: May 10, 2019	By:	/s/ THOMAS S. ROMAN
		Thomas S. Roman
		Corporate Controller
		[Principal Accounting Officer]

68

EX-31.1

Exhibit 31.1

CERTIFICATION

I, David H. Li, Chief Executive Officer of Cabot Microelectronics Corporation, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Cabot Microelectronics Corporation;

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 (the registrant's fourth fiscal quarter in the case of an annual report) 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 registrant's board of directors:

(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

Date: May 10, 2019	/s/ DAVID H. LI
	David H. Li
	Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Scott D. Beamer, Chief Financial Officer of Cabot Microelectronics Corporation, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Cabot Microelectronics Corporation;

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 (the registrant's fourth fiscal quarter in the case of an annual report) 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 registrant's board of directors:

(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.

Date: May 10, 2019	/s/ SCOTT D. BEAMER
	Scott D. Beamer
	Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Cabot Microelectronics Corporation (the "Company") on Form 10-Q for the fiscal quarter ended March 31, 2019, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), each of the undersigned officers of the Company certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

 

Date: May 10, 2019	/s/ DAVID H. LI
	David H. Li
	Chief Executive Officer
Date: May 10, 2019	/s/ SCOTT D. BEAMER
	Scott D. Beamer
	Chief Financial Officer

XML

Document and Entity Information - shares	6 Months Ended
	Mar. 31, 2019	Apr. 30, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	CABOT MICROELECTRONICS CORP
Entity Central Index Key	0001102934
Current Fiscal Year End Date	--09-30
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Ex Transition Period	false
Entity Common Stock, Shares Outstanding		29,061,830
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2

XML

CONSOLIDATED STATEMENTS OF INCOME (LOSS) (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
CONSOLIDATED STATEMENTS OF INCOME (LOSS) (UNAUDITED) [Abstract]
Revenue	$ 265,391	$ 142,978	$ 487,169	$ 282,957
Cost of sales	150,571	67,933	273,016	133,898
Gross profit	114,820	75,045	214,153	149,059
Operating expenses:
Research, development and technical	12,778	13,368	26,818	25,519
Selling, general and administrative	50,328	24,589	111,456	49,340
Total operating expenses	63,106	37,957	138,274	74,859
Operating income	51,714	37,088	75,879	74,200
Interest expense	13,331	1,158	20,221	2,290
Interest income	568	1,156	1,587	2,107
Other income (expense), net	(1,014)	(94)	(2,425)	(373)
Income before income taxes	37,937	36,992	54,820	73,644
Provision for income taxes	10,800	7,255	14,240	46,990
Net income	$ 27,137	$ 29,737	$ 40,580	$ 26,654
Basic earnings (loss) per share (in dollars per share)	$ 0.94	$ 1.16	$ 1.45	$ 1.05
Weighted average basic shares outstanding (in shares)	28,997,632	25,592,508	28,065,759	25,473,757
Diluted earnings (loss) per share (in dollars per share)	$ 0.92	$ 1.14	$ 1.42	$ 1.02
Weighted average diluted shares outstanding (in shares)	29,479,114	26,161,186	28,607,033	26,075,682

XML

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) [Abstract]
Net income	$ 27,137	$ 29,737	$ 40,580	$ 26,654
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(992)	3,961	1,433	11,105
Net unrealized gain on available-for-sale securities	0	46	0	0
Minimum pension liability adjustment	251	0	0	0
Net unrealized gain (loss) on cash flow hedges	(6,474)	(52)	(6,474)	147
Other comprehensive income (loss), net of tax	(7,215)	3,955	(5,041)	11,252
Comprehensive income	$ 19,922	$ 33,692	$ 35,539	$ 37,906

XML

CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Current assets:
Cash and cash equivalents	$ 192,260	$ 352,921
Accounts receivable, less allowance for doubtful accounts of $1,704 at March 31, 2019, and $1,900 at September 30, 2018	131,880	75,886
Inventories	147,324	71,926
Prepaid expenses and other current assets	30,551	22,048
Total current assets	502,015	522,781
Property, plant and equipment, net	263,556	111,403
Goodwill	705,426	101,083
Other intangible assets, net	854,378	35,202
Deferred income taxes	5,498	5,840
Other long-term assets	6,215	4,664
Total assets	2,337,088	780,973
Current liabilities:
Accounts payable	47,330	18,171
Current portion of long-term debt	13,313	0
Accrued expenses, income taxes payable and other current liabilities	86,913	82,983
Total current liabilities	147,556	101,154
Long-term debt, net of current portion, less prepaid debt issuance cost of $20,170 at December 31, 2018	987,276	0
Deferred income taxes	150,575	81
Other long-term liabilities	25,814	13,046
Total liabilities	1,311,221	114,281
Commitments and contingencies (Note 10)
Stockholders' equity:
Common Stock: Authorized: 200,000,000 shares, $0.001 par value; Issued: 39,446,709 shares at March 31, 2019, and 35,862,465 shares at September 30, 2018	39	36
Capital in excess of par value of common stock	975,612	622,498
Retained earnings	487,467	471,673
Accumulated other comprehensive income	(502)	4,539
Treasury stock at cost, 10,401,574 shares at March 31, 2019, and 10,356,147 shares at September 30, 2018	(436,749)	(432,054)
Total stockholders' equity	1,025,867	666,692
Total liabilities and stockholders' equity	$ 2,337,088	$ 780,973

XML

CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Current assets:
Allowance for doubtful accounts	$ 1,704	$ 1,900
LIABILITIES AND STOCKHOLDERS' EQUITY
Long-term debt, prepaid debt issuance cost	$ 19,411
Stockholders' equity
Common stock: authorized (in shares)	200,000,000	200,000,000
Common stock: par value (in dollars per share)	$ 0.001	$ 0.001
Common stock: issued (in shares)	39,446,709	35,862,465
Treasury stock at cost, shares (in shares)	10,401,574	10,356,147

XML

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 40,580	$ 26,654
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	43,889	13,138
Provision for doubtful accounts	(314)	5
Share-based compensation expense	11,708	10,082
Deemed repatriation transition tax	0	24,641
Deferred income tax (expense) benefit	(13,811)	15,291
Non-cash foreign exchange (gain) loss	354	(11)
Loss (Gain) on disposal of property, plant and equipment	(58)	18
Non-cash charge on inventory step up of acquired inventory sold	14,827	0
Realized loss on the sale of available-for-sale securities	0	118
Amortization of debt issuance costs	1,286	63
(Gain) on sale of assets	0	(956)
Other	2,337	2,125
Changes in operating assets and liabilities:
Accounts receivable	9,445	(4,370)
Inventories	(21,100)	(3,771)
Prepaid expenses and other assets	5,415	(5,503)
Accounts payable	(429)	(407)
Accrued expenses, income taxes payable and other liabilities	(40,601)	(9,983)
Net cash provided by operating activities	53,528	67,134
Cash flows from investing activities:
Additions to property, plant and equipment	(19,472)	(8,804)
Acquisition of a business, net of cash acquired	(1,182,186)	0
Proceeds from the sale of assets		2,999
Purchases of available-for-sale securities	0	(50,673)
Proceeds from the sale and maturities of available-for-sale securities	0	50,548
Cash settlement of life insurance policy	3,959	0
Proceeds from the disposition of property	1,210
Net cash used in investing activities	(1,196,489)	(5,930)
Cash flows from financing activities:
Repayment of long-term debt	(45,000)	(6,563)
Repurchases of common stock	(4,695)	(9,937)
Proceeds from issuance of long-term debt	1,062,337	0
Debt issuance costs	(18,745)	0
Proceeds from issuance of stock	10,361	18,089
Dividends paid	(21,934)	(10,228)
Net cash provided by (used in) financing activities	982,324	(8,639)
Effect of exchange rate changes on cash	(24)	10,979
Decrease in cash and cash equivalents	(160,661)	63,544
Cash and cash equivalents at beginning of period	352,921	397,890
Cash and cash equivalents at end of period	192,260	461,434
Supplemental disclosure of non-cash investing and financing activities:
Purchases of property, plant and equipment in accrued liabilities and accounts payable at the end of the period	2,425	2,068
Equity consideration related to the acquisition of KMG Chemicals, Inc	$ 331,048	$ 0

XML

CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Common Stock [Member]	Capital In Excess Of Par [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]	Total
Balance at beginning of period at Sep. 30, 2017	$ 35	$ 580,938	$ 397,881	$ 3,949	$ (387,766)	$ 595,037
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		5,881				5,881
Repurchases of common stock under share repurchase plans, at cost					(1,591)	(1,591)
Repurchases of common stock - other, at cost					(3,160)	(3,160)
Exercise of stock options		6,139				6,139
Issuance of Cabot Microelectronics restricted stock under Deposit Share Program		300				300
Net income			(3,083)			(3,083)
Dividends			(5,153)			(5,153)
Foreign currency translation adjustment				7,144		7,144
Interest rate swaps				199		199
Unrealized loss in short term available-for-sale securities				(46)		(46)
Balance at end of period at Dec. 31, 2017	35	593,258	389,645	11,246	(392,517)	601,667
Balance at beginning of period at Sep. 30, 2017	35	580,938	397,881	3,949	(387,766)	595,037
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income						26,654
Foreign currency translation adjustment						11,105
Unrealized loss in short term available-for-sale securities						0
Minimum pension liability adjustment						0
Balance at end of period at Mar. 31, 2018	36	609,104	408,992	15,201	(397,822)	635,511
Balance at beginning of period at Dec. 31, 2017	35	593,258	389,645	11,246	(392,517)	601,667
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		4,223				4,223
Repurchases of common stock under share repurchase plans, at cost					(5,005)	(5,005)
Repurchases of common stock - other, at cost					(300)	(300)
Exercise of stock options	1	9,611				9,612
Issuance of Cabot Microelectronics stock under Employee Stock Purchase Plan		2,012				2,012
Net income			29,737			29,737
Dividends			(10,390)			(10,390)
Foreign currency translation adjustment				3,961		3,961
Interest rate swaps				(52)		(52)
Unrealized loss in short term available-for-sale securities				46		46
Minimum pension liability adjustment						0
Balance at end of period at Mar. 31, 2018	36	609,104	408,992	15,201	(397,822)	635,511
Balance at beginning of period at Sep. 30, 2018	36	622,498	471,673	4,539	(432,054)	666,692
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		8,170				8,170
Repurchases of common stock - other, at cost					(4,001)	(4,001)
Exercise of stock options		3,097				3,097
Issuance of common stock in connection with acquisition of KMG Chemicals, Inc.	3	331,045				331,048
Issuance of Cabot Microelectronics restricted stock under Deposit Share Program		75				75
Net income			13,443			13,443
Dividends			(11,598)			(11,598)
Foreign currency translation adjustment				2,425		2,425
Minimum pension liability adjustment				(251)		(251)
Balance at end of period at Dec. 31, 2018	39	964,885	472,585	6,713	(436,055)	1,008,167
Balance at beginning of period at Sep. 30, 2018	36	622,498	471,673	4,539	(432,054)	666,692
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income						40,580
Foreign currency translation adjustment						1,433
Unrealized loss in short term available-for-sale securities						0
Minimum pension liability adjustment						0
Balance at end of period at Mar. 31, 2019	39	975,612	487,467	(502)	(436,749)	1,025,867
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of the adoption of the revenue recognition accounting standards			(933)			(933)
Balance at beginning of period at Dec. 31, 2018	39	964,885	472,585	6,713	(436,055)	1,008,167
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		3,538				3,538
Repurchases of common stock - other, at cost					(694)	(694)
Exercise of stock options		5,080				5,080
Issuance of Cabot Microelectronics stock under Employee Stock Purchase Plan		2,109				2,109
Net income			27,137			27,137
Dividends			(12,255)			(12,255)
Foreign currency translation adjustment				(992)		(992)
Interest rate swaps				(6,474)		(6,474)
Unrealized loss in short term available-for-sale securities						0
Minimum pension liability adjustment				251		251
Balance at end of period at Mar. 31, 2019	$ 39	$ 975,612	$ 487,467	$ (502)	$ (436,749)	$ 1,025,867

XML

BACKGROUND AND BASIS OF PRESENTATION

6 Months Ended

Mar. 31, 2019

BACKGROUND AND BASIS OF PRESENTATION [Abstract]

BACKGROUND AND BASIS OF PRESENTATION

1. BACKGROUND AND BASIS OF PRESENTATION

Cabot Microelectronics Corporation (“Cabot Microelectronics”, “the Company”, “us”, “we”, or “our”') is a leading global supplier of consumable materials to semiconductor manufacturers and pipeline operators.  On November 15, 2018 (“Acquisition Date”), we completed our acquisition of KMG Chemicals, Inc. (“KMG”), which produces and distributes specialty chemicals and performance materials for the semiconductor, industrial wood preservation, pipeline and energy industries (“Acquisition”).  The Acquisition has extended and strengthened our position as one of the leading suppliers of consumable materials to the semiconductor industry and expands our portfolio with the addition of KMG’s businesses, which we believe will enable us to be a leading global provider of performance products and services to the pipeline operations and energy industries. The Consolidated Financial Statements included in this Report on Form 10-Q include the financial results of KMG from the Acquisition Date. Subsequent to the Acquisition, we have operated our business within two reportable segments: Electronic Materials and Performance Materials. The Electronic Materials segment consists of our heritage CMP slurries and polishing pads businesses, as well as the KMG electronic chemicals business.  The Performance Materials segment includes KMG’s heritage pipeline performance and wood treatment businesses, and Cabot Microelectronics’ heritage QED business. For additional information, refer to Part 1, Item 1, “Business”, in our and KMG’s Annual Reports on Form 10-K for the fiscal year ended September 30, 2018 and July 31, 2018, respectively.

The unaudited Consolidated Financial Statements have been prepared by Cabot Microelectronics pursuant to the rules of the Securities and Exchange Commission (SEC) and accounting principles generally accepted in the United States of America (U.S. GAAP).  In the opinion of management, these unaudited Consolidated Financial Statements include all adjustments, consisting of normal recurring adjustments, necessary for the fair statement of Cabot Microelectronics’ financial position as of March 31, 2019, cash flows for the six months ended March 31, 2019 and March 31, 2018, and results of operations for the three and six months ended March 31, 2019 and March 31, 2018.  The Consolidated Balance Sheets as of September 30, 2018 were derived from audited financial statements. The results of operations for the three and six months ended March 31, 2019 may not be indicative of results to be expected for future periods, including the fiscal year ending September 30, 2019.  Certain prior period amounts have been reclassified to conform to the current period presentation.  This Report on Form 10-Q does not contain all of the footnote disclosures from the annual financial statements and should be read in conjunction with the Consolidated Financial Statements and related notes thereto included in Cabot Microelectronics’ Annual Report on Form 10-K for the fiscal year ended September 30, 2018.

The Consolidated Financial Statements include the accounts of Cabot Microelectronics and its subsidiaries. All intercompany transactions and balances between the companies have been eliminated as of March 31, 2019.

USE OF ESTIMATES

The preparation of financial statements and related disclosures in conformity with U.S. GAAP requires management to make judgments, assumptions and estimates that affect the amounts reported in the Consolidated Financial Statements and accompanying notes. The accounting estimates that require management's most difficult and subjective judgments include, but are not limited to, those estimates related to bad debt expense, inventory valuation, impairment of long-lived assets and investments, business combinations, goodwill, other intangible assets, share-based compensation, income taxes and contingencies. We base our estimates on historical experience, current conditions and on various other assumptions that we believe are reasonable under the circumstances. However, future events are subject to change and estimates and judgments routinely require adjustment. Actual results may differ from these estimates under different assumptions or conditions.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS

6 Months Ended

Mar. 31, 2019

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS [Abstract]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS

Significant Accounting Policies and Estimates

Except for the discussion on revenue recognition below, no material changes have been made to the Company’s significant accounting policies disclosed in Note 2 of the Notes to the Consolidated Financial Statements in our Annual Report on Form 10-K for the fiscal year ended September 30, 2018.

REVENUE RECOGNITION

As of October 1, 2018, the Company began applying the provisions of Accounting Standards Codification 606-10, “Revenue from Contracts with Customers” (“ASC 606”), and all related appropriate guidance using the modified retrospective method applied to those contracts which were not completed as of October 1, 2018.  The Company recognizes revenue under the core principle of depicting the transfer of control to the Company’s customers in an amount reflecting the consideration to which the Company expects to be entitled. In order to achieve that core principle, the Company applies the following five step approach: (1) identify the contract with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when a performance obligation is satisfied.

Upon adoption of ASC 606 we recognized a $933 decrease to the opening balance of retained earnings, net of tax, due to the cumulative impact of adopting the new revenue standards. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods.  The Company changed its accounting policy for revenue recognition for customer incentives that provide free products and tiered pricing.  For free products, the new revenue standards require that a portion of the transaction price be allocated to the free product and deferred until the product has been delivered.  We previously accrued for undelivered free product as a charge to cost of sales.  In prior fiscal years, in accordance with ASC 605, we did not consider prospective tiered pricing to represent a material right.

The cumulative effect of the changes made to our Consolidated Balance Sheet as of October 1, 2018 for the adoption of the new revenue standardswas as follows:

	Balance at September 30, 2018		Adjustments Due to ASC 606			Balance at October 1, 2018
Deferred income tax assets	$	5,840	$	261		$	6,101
Accrued expenses, income taxes payable and other current liabilities		82,983		(47	)		82,936
Other long-term liabilities		13,046		1,241			14,287
Retained earnings	$	471,673	$	(933	)	$	470,740

We have determined that the effect of applying the new revenue standards during the three and six months ended March 31, 2019 was immaterial to our financial statements compared to revenue guidance in effect before the adoption of the new revenue standards.  As a result, for the three and six months ended March 31, 2019, we are not disclosing the quantitative amount by which each financial statement line item is affected by the application of the new revenue standards.

As part of the adoption of ASU 606, the Company elected to use certain allowed practical expedients. For the Company’s contracts that have an original duration of one year or less as of the adoption date, the Company uses the practical expedient applicable to such contracts and does not consider the time value of money. Further, because of the short duration of these contracts, the Company has not disclosed the transaction price for the future performance obligations as of the end of each reporting period for contracts having an expected duration of one year or less.  See Note 3 of this Report on Form 10-Q for disaggregated revenue, the reconciliation of contract balances and transaction price allocation to remaining performance obligations for contracts expected to remain effective beyond one year.

Performance Obligations and Material Rights

At contract inception, the Company assesses the goods and services promised in its contracts with customers and identifies a performance obligation for each material promise to the customer.  A performance obligation is a promise in a contract to transfer a distinct good or service, or a bundle of goods or services, to the customer, and is the unit of accounting under ASC 606. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. A majority of the Company’s contracts have a single performance obligation which represents, in most cases, the products, equipment or services being sold to the customer. Some contracts include multiple performance obligations including prospective tiered price discounts or delivery of free product that we have concluded represents a material right. Contracts with prospective tiered price discounts require judgment in determining if that discount represents a material right.

Contracts vary in length and payment terms vary by the type and location of the Company’s customers and the products or services offered. However, the period of time between invoicing and when payment is due is typically not significant and has no significant financing components.  Customers pay in accordance with negotiated terms upon receipt of goods or completion of services.  For these contracts, the transaction price is determined upon establishment of the contract that contains the final terms of the sale, including the description, quantity, and price of goods or services purchased.  In certain instances, we receive consideration from a customer prior to transferring goods or services to the customer under the terms of a sales contract.  In such cases, we record deferred revenue until the performance obligation is satisfied, which represents a contract liability, and is included in the contract liabilities discussed in Note 3 of this Form 10-Q.

The Company recognizes revenue related to product sales at a point in time following the transfer of control of such products to the customer, which generally occurs upon shipment, or delivery depending on the terms of the underlying contracts. The Company considers control to have transferred upon shipment or delivery because the Company has a present right to payment at that time, the customer has legal title to the asset, the Company has transferred physical possession of the asset, and the customer has significant risks and rewards of ownership of the asset.  Revenue is recognized on consignment sales when control transfers to the customer, generally at the point of customer usage of the product. The Company also records revenue for services provided to the pipeline and oilfield energy industries.  These services include preventive maintenance, repair and specialized isolation sealing on pipelines and training. Revenue is recorded at a point in time when the services are completed as this is when right to payment and customer acceptance occurs.

For sales contracts that contain multiple performance obligations, the Company allocates the transaction price to each performance obligation identified in the contract based on relative standalone selling prices or estimates of such prices.  Standalone selling price, once established, is then used to allocate total consideration proportionally to the various performance obligations within a contract. Most contracts where we have determined there to be multiple performance obligations relate to where we have identified a material right to exist such that we provide prospective tiered pricing discounts or free product. When we invoice for products shipped under these contracts, we defer the revenue associated with these rights on the balance sheet as a contract liability. Revenue is recognized when the customer exercises the option to purchase goods at a discount in the case of the prospective tiered pricing discounts or when we ship the free product.

Variable Consideration

The primary type of variable consideration present in the Company’s contracts are rebates and early payment discounts, both of which are immaterial. Early payment discounts are offered on a limited basis and are not significant.  The Company also offers rebates based upon cumulative volume of purchases within a quarter and accrues for the rebate obligation within the quarter that the rebate is earned.  ASC 606 did not change the accounting for rebates under ASC 605.

Costs to Obtain and Fulfill a Contract

For certain contracts within the Performance Materials segment, commissions are paid to sales agents based upon a percentage of end-customer invoice value. Agents are paid the commissions after funds are received by the Company from its customers.  Under ASC 340, sales commissions are required to be capitalized and expensed over the associated contract period.  However, as a practical expedient, the Company does not capitalize commissions as the associated contracts are generally one year or less in duration. For shipping and handling activities performed after a customer obtains control of the goods, the Company has elected to account for these costs as activities to fulfill the promise to transfer the goods and included in cost of sales.

EFFECTS OF RECENT ACCOUNTING PRONOUNCEMENTS

In February 2016, the FASB issued ASU No. 2016-02, "Leases" (Topic 842).  The provisions of ASU 2016-02 require a dual approach for lessee accounting under which a lessee would recognize a right-of-use asset and a corresponding lease liability.  Leases will be classified as either finance or operating leases.  For finance leases, a lessee will recognize interest expense and amortization of the right-of-use asset, and for operating leases, the lessee will recognize a straight-line total lease expense.  The guidance also requires qualitative and specific quantitative disclosures to supplement the amounts recorded in the financial statements, to afford better understanding of an entity's leasing activities, including any significant judgments and estimates.   The guidance was amended through various ASU's subsequent to ASU 2016-02, all of which will be effective for us beginning October 1, 2019, but early adoption is permitted.  We are currently evaluating the impact of implementation of this standard on our financial statements.

In June 2016, the FASB issued ASU No. 2016-13, "Measurement of Credit Losses on Financial Instruments" (Topic 326). The provisions of this standard require financial assets measured at amortized cost to be presented at the net amount expected to be collected. An allowance account would be established to present the net carrying value at the amount expected to be collected. ASU 2016-13 also provides that credit losses relating to available-for-sale debt securities should be recorded through an allowance for credit losses. ASU 2016-13 will be effective for us beginning October 1, 2020, but early adoption is permitted as of October 1, 2019. We are currently evaluating the impact of implementation of this standard on our financial statements.

In March 2017, the FASB issued ASU No. 2017-07 "Improving the Presentation of Net Period Pension Cost and Net Period Postretirement Benefit Cost" (Topic 715). The provisions of ASU 2017-07 provided specific guidance on the presentation of the components of net benefit cost.  We adopted this standard ASU 2017-07 effective October 1, 2018 and applied it retrospectively. Pursuant to the adoption, net service costs are recorded as fringe benefit expense under cost of sales and operating expenses, and all other costs are recorded in the Other income (expense), net in our Consolidated Statements of Income. The impact of the retrospective adoption in fiscal 2018 is not material.

In May 2017, the FASB issued ASU No. 2017-09 "Scope of Modification Accounting" (Topic 718). The provisions of ASU 2017-09 provide specific guidance about which changes to the term or conditions of a share-based payment require an entity to apply modification accounting.  We adopted ASU 2017-09 effective October 1, 2018 and will apply this new standard to the share-based compensation awards, to the extent modified.

In August 2017, the FASB issued ASU No. 2017-12 "Derivatives and Hedging" (Topic 815). The provisions of this standard amend the hedge accounting model in ASC 815 to expand an entity's ability to hedge nonfinancial and financial risk components, reduce complexity in fair value hedges of interest rate risk, eliminate the requirement to separately measure and report hedge ineffectiveness, and generally require the entire change in the fair value of a hedging instrument to be presented in the same income statement line as the hedged item. The guidance also eases certain documentation and assessment requirements and modifies the accounting for components excluded from the assessment of hedge effectiveness.  We early adopted this guidance effective January 1, 2019, and we did not have any hedges that existed as of the initial application date.  We applied the new guidance to the interest rate swap that we entered into during our second quarter of fiscal 2019. Pursuant to the guidance, we performed initial quantitative hedge effectiveness testing upon the hedge inception, and determined the hedge to be highly effective.  Therefore, unrealized changes in fair value are recorded in other comprehensive income.  In addition, we reclassify the realized gains and losses out of other comprehensive income, and into interest expense in our Consolidated Statements of Income, which is the same financial statement line as the hedged item.  We will perform subsequent assessments of hedge effectiveness qualitatively on a quarterly basis.

In February 2018, the FASB issued ASU No. 2018-02 "Income Statement – Reporting Comprehensive Income (Topic 220)".  The amendments in this standard allow a company to reclassify the stranded tax effects resulting from the Tax Cuts and Jobs Act (the "Tax Act") from accumulated other comprehensive income to retained earnings. ASU 2018-02 will be effective for us beginning October 1, 2019, but early adoption is permitted. We are currently evaluating the impact of implementation of this standard on our financial statements.

In June 2018, the FASB issued ASU No. 2018-07 " Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting".  The ASU simplified the accounting for share-based payments granted to nonemployees for goods and services, therefore guidance on such payments to nonemployees would be mostly aligned with the requirements for share-based payments granted to employees. ASU 2018-07 will be effective for us beginning October 1, 2019, but early adoption is permitted (but no earlier than the adoption date of Topic 606). We are currently evaluating the impact of implementation of this standard on our financial statements.

In August 2018, the FASB issued ASU No. 2018-13 " Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement".  The ASU provides specific guidance on various disclosure requirements in Topic 820, including removal, modification and addition to current disclosure requirements. ASU 2018-13 will be effective for us beginning October 1, 2020, but early adoption is permitted. We are currently evaluating the impact of implementation of this standard on our disclosures.

In August 2018, the FASB issued ASU No. 2018-15 " Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force)".  The ASU Requires an entity (customer) in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which implementation costs to capitalize as an asset related to the service contract and which costs to expense. ASU 2018-15 will be effective for us beginning October 1, 2020, but early adoption is permitted. We are currently evaluating the impact of implementation of this standard on our financial statements.

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REVENUE FROM CONTRACTS WITH CUSTOMERS

6 Months Ended

Mar. 31, 2019

REVENUE FROM CONTRACTS WITH CUSTOMERS [Abstract]

REVENUE FROM CONTRACTS WITH CUSTOMERS

3.  REVENUE FROM CONTRACTS WITH CUSTOMERS

Disaggregation of Revenue

The Company disaggregates revenue by product area and segment as it best depicts the nature and amount of the Company’s revenue.

The following table shows revenue generated by product area during the three and six months ended March 31, 2019 and 2018:

	Three Months Ended March 31,				Six Months Ended March 31,
	2019		2018		2019		2018
Revenue:
Electronic Materials:
CMP Slurries	$	110,299	$	115,086	$	236,627	$	229,522
Electronic Chemicals		78,549		-		118,371		-
CMP Pads		23,998		21,017		48,464		39,895
Total Electronic Materials		212,846		136,103		403,462		269,417
Performance Materials		52,545		6,875		83,707		13,540
Total revenue	$	265,391	$	142,978	$	487,169	$	282,957

Reconciliation of Contract Liability Balances

The following table provides information about contract liability balances:

	March 31, 2019		October 1, 2018
Contract liabilities (current)	$	3,611	$	5,310
Contract liabilities (noncurrent)		1,414		1,239

The contract liability balances as of October 1, 2018 in the table above include the amounts recorded upon the adoption of ASC 606.  At March 31, 2019, the current portion of contract liabilities of $3,611 is included in accrued liabilities, taxes payable and other current liabilities and the noncurrent portion of $1,414 is included in other long-term liabilities in the Consolidated Balance Sheets.  The amount of revenue recognized during the three and six months ended March 31, 2019 that was included in the opening current contract liability balances in our Performance Materials segment were  $2,317 and $4,160, respectively.  The amount of revenue recognized during the three and six months ended March 31, 2019 that was included in our opening contract liability balances in our Electronic Materials segment was not material.

Transaction Price Allocated to Remaining Performance Obligations

The table below discloses (1) the aggregate amount of the transaction price allocated to performance obligations that are unsatisfied (or partially unsatisfied) as of the end of the reporting period for contracts with an original duration of greater than one year and (2) when the Company expects to recognize this revenue.

	Less Than 1 Year			1-3 Years			3-5 Years			Total
Revenue expected to be recognized on contract liability amounts as of March 31, 2019		$	87		$	1,085		$	329		$	1,501

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BUSINESS COMBINATION

6 Months Ended

Mar. 31, 2019

BUSINESS COMBINATION [Abstract]

BUSINESS COMBINATION

4. BUSINESS COMBINATION

On the Acquisition Date, the Company completed its acquisition of 100% of the outstanding stock of KMG, which was a publicly held company headquartered in Fort Worth, Texas. KMG specializes in producing and distributing electronic chemicals for the semiconductor industry and performance materials for the pipeline, energy, and industrial wood preservation industries. We acquired KMG to extend and strengthen our position as one of the leading suppliers of consumable materials to the semiconductor industry and to expand our portfolio with the addition of KMG’s performance materials business, which we believe will enable us to be a leading global provider of performance products and services to the pipeline operations and energy industries. The purchase consideration was $1,513,235, including consideration transferred of $1,536,452, less cash acquired of $23,217. The consideration was comprised of cash consideration to KMG common shareholders and equity award holders, stock consideration to KMG common shareholders and equity award holders, and cash consideration in the form of the retirement of KMG’s preexisting debt obligations.  Under the terms of the definitive agreement to acquire KMG, each share of KMG common stock was converted into the right to receive $55.65 in cash and 0.2000 of a share of Cabot Microelectronics common stock. As a result, we issued 3,237,005 shares of our common stock to KMG’s common stockholders, with a stock price of $102.27 on the Acquisition Date. In connection with the Acquisition, we entered into a credit agreement (the “Credit Agreement”), which provided us with a seven-year, $1,065,000 term loan facility (the “Term Loan Facility”), which we drew on the Acquisition Date to fund the Acquisition along with cash on hand, and a five-year, $200,000 revolving credit facility (the “Revolving Credit Facility”), which has not been drawn. In connection with the borrowing, we incurred $21,408 in debt issuance costs and original issue discount fees, $859 of which relates to the Revolving Credit Facility and is recorded as a prepaid asset, and the remaining $20,549 in debt issuance costs relates to the Term Loan Facility and is presented as a reduction of long-term debt. These debt issuance costs are amortized and recorded in Interest expense in the Consolidated Statements of Income over the life of the Revolving Credit Facility and Term Loan Facility, respectively. See below for a summary of the different components that comprise the total consideration.

	Amount
Total cash consideration paid for KMG outstanding common stock and equity awards	$	900,756
Cash provided to payoff KMG debt		304,648
Total cash consideration paid		1,205,404
Fair value of Cabot Microelectronics common stock issued for KMG outstanding common stock and equity awards		331,048
Total consideration transferred	$	1,536,452

The following table summarizes the preliminary allocation of fair values of assets acquired and liabilities assumed as of Acquisition Date:

Cash	$	23,217
Accounts receivable		64,711
Inventories		68,963
Prepaid expenses and other current assets		14,798
Property, plant and equipment		149,504
Intangible assets		844,800
Other long-term assets		6,208
Accounts payable		(28,894	)
Accrued expenses and other current liabilities		(43,451	)
Deferred income taxes liabilities		(164,469	)
Other long-term liabilities		(3,754	)
Total identifiable net assets acquired		931,633
Goodwill		604,819
Total consideration transferred	$	1,536,452

The acquisition was accounted for using the acquisition method of accounting. Tangible and identifiable intangible assets acquired and liabilities assumed are recorded at fair value as of the Acquisition Date. These valuations are preliminary based on the information currently available, and the expectations and assumptions that have been deemed reasonable by the Company’s management.  The Company has not finalized the fair value determinations of the assets acquired and liabilities assumed and expects to finalize as soon as practicable, but not later than one-year from the Acquisition Date.  As a result, certain adjustments have been made and will continue to be made to the Company’s Consolidated Balance Sheet and Statements of Income.

The fair values of identifiable assets and liabilities acquired were developed with the assistance of a third-party valuation firm. The fair value of acquired property, plant and equipment is primarily valued at its “value-in-use.” The fair value of acquired identifiable intangible assets was determined using the “income approach” on an individual asset basis. The key assumptions used in the calculation of the discounted cash flows include projected revenue, gross margin, operating expenses, discount rate and customer attrition.  The valuations and the underlying assumptions have been deemed reasonable by the Company’s management. There are inherent uncertainties and management judgment required in these determinations.

The following table sets forth the components of identifiable intangible assets acquired and their estimated useful lives as of the Acquisition Date:

	Fair Value		Estimated Useful Life (years)
Customer relationships	$	704,000		15-20
Technology and know-how		85,500		9-11
Trade name - Flowchem		46,000	Indefinite
Trade name - all other		7,000		1-15
EPA product registration rights		2,300		15
Total intangible assets	$	844,800

Customer relationships represent the estimated fair value of the underlying relationships and agreements with KMG’s customers and are being amortized on an accelerated basis in order for the expense to most accurately match the periods of highest cash flows attributable to the identified relationships. Technology and know-how represent the estimated fair value of KMG’s technology, processes and knowledge regarding its product offerings, and are being amortized on a straight-line basis. Trade names represents the estimated fair value of the brand and name recognition associated with the marketing of KMG’s product offerings and are being amortized on a straight-line basis, except for the Flowchem trade name, which we believe has an indefinite life. These intangible assets are capitalized and accounted for as indefinite-lived intangible assets and will be subject to impairment testing. The intangible assets subject to amortization have a weighted average useful life of 17.9 years.

The excess of consideration transferred over the fair value of net assets acquired was recorded as goodwill, and is not deductible for income tax purposes. The goodwill is primarily attributable to anticipated revenue growth from the combined company product portfolio, expected synergies of the combined company, and the assembled workforce of KMG. The preliminary allocation of goodwill to each of the Electronic Materials and Performance Materials segments as a result of this Acquisition was $262,746 and $342,073, respectively.

For the three and six month ended March 31, 2019, we recorded $2,904 and $30,198 in acquisition and integration-related expenses, including transaction costs, stock compensation expense, severance and retention costs. These items are included within Selling, general and administrative in the Consolidated Statements of Income. In the same three and six month ended March 31, 2019, we also recorded a charge of $4,566 and $14,827 related to the fair value write-up of acquired inventory sold, respectively, which is included in Cost of sales in the Consolidated Statements of Income.

KMG’s results of operations have been included in our unaudited Consolidated Statements of Income and Consolidated Statements of Comprehensive Income from the Acquisition Date. Net sales of the acquired KMG business since the Acquisition Date through March 31, 2019 were $185,127. KMG’s net loss since the Acquisition Date was $5,561, which includes $19,996 of acquisition related costs and a $14,827 charge for fair value write-up of inventory sold. Further, additional amortization and depreciation expense associated with recording KMG’s net assets at fair value decreased KMG’s net income post-Acquisition.

The following unaudited supplemental pro forma information summarizes the combined results of operations for Cabot Microelectronics and KMG as if the Acquisition had occurred on October 1, 2017.

	Three Months Ended March 31,				Six Months Ended March 31,
	2019		2018		2019		2018
Revenues	$	265,391	$	259,372	$	549,147	$	512,105
Net income (loss)		28,056		24,902		66,873		(38,262	)
Earnings per share - basic	$	0.97	$	0.86	$	2.32	$	(1.33	)
Earnings per share - diluted	$	0.95	$	0.85	$	2.27	$	(1.33	)

The following costs are included in the three and six months ended March 31, 2018:

● Non-recurring transaction costs of $580 and $30,610, respectively.

● Non-recurring transaction-related employee costs, such as accelerated stock compensation expense, retention and severance    expense of $460 and $35,601, respectively.

● Non-recurring charge for fair value write-up of inventory sold of $1,045 and $14,859, respectively.

The historical financial information has been adjusted byapplying the Company’s accounting policies and giving effect to the pro forma adjustments, which consist of (i) amortization expense associated with identified intangible assets; (ii) depreciation of fixed asset step-up; (iii) accretion of inventory step-up value; (iv) the elimination of interest expense on pre-acquisition KMG debt and replacement of interest expense related to the acquisition-related financing; (v) transaction-related costs; (vi) accelerated share-based compensation expense; (vii) retention and severance expense incurred as a direct result of the acquisition; and (viii) an adjustment to tax-effect the aforementioned unaudited pro forma adjustments using an estimated weighted-average effective income tax rate of each entity and the jurisdictions to which the above adjustments relate. The pro forma consolidated results are not necessarily indicative of what the consolidated results actually would have been had the Acquisition been completed on October 1, 2017. The pro forma consolidated results do not purport to project future results of combined operations, nor do they reflect the expected realization of any revenue or cost synergies associated with the Acquisition.

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FAIR VALUE OF FINANCIAL INSTRUMENTS

6 Months Ended

Mar. 31, 2019

FAIR VALUE OF FINANCIAL INSTRUMENTS [Abstract]

FAIR VALUE OF FINANCIAL INSTRUMENTS

5. FAIR VALUE OF FINANCIAL INSTRUMENTS

Fair value is defined as the price that would be received from the sale of 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 Financial Accounting Standards Board (“FASB”) established a three-level hierarchy for disclosure based on the extent and level of judgment used to estimate fair value.  Level 1 inputs consist of valuations based on quoted market prices in active markets for identical assets or liabilities.  Level 2 inputs consist of valuations based on quoted prices for similar assets or liabilities, quoted prices for identical assets or liabilities in an inactive market, or other observable inputs.  Level 3 inputs consist of valuations based on unobservable inputs that are supported by little or no market activity.

The following table presents financial instruments, other than long-term debt, that we measured at fair value on a recurring basis at March 31, 2019 and September 30, 2018.  See Note 10 for a detailed discussion of our long-term debt.  We have classified the following assets and liabilities in accordance with the fair value hierarchy set forth in the applicable standards.  In instances where the inputs used to measure the fair value of an asset fall into more than one level of the hierarchy, we have classified them based on the lowest-level input that is significant to the determination of the fair value. 

March 31, 2019	Level 1		Level 2		Level 3		Total Fair Value
Assets:
Cash and cash equivalents	$	192,260	$	-	$	-	$	192,260
Other long-term investments		1,371		-		-		1,371
Total assets	$	193,631	$	-	$	-	$	193,631
Liabilities:
Derivative financial instruments		-		8,401		-		8,401
Total liabilities	$	-	$	8,401	$	-	$	8,401

September 30, 2018	Level 1		Level 2		Level 3		Total Fair Value
Assets:
Cash and cash equivalents	$	352,921	$	-	$	-	$	352,921
Other long-term investments		1,137		-		-		1,137
Total assets	$	354,058	$	-	$	-	$	354,058
Liabilities:
Derivative financial instruments		-		339		-		339
Total liabilities	$	-	$	339	$	-	$	339

Our cash and cash equivalents consist of various bank accounts used to support our operations and investments in institutional money-market funds that are traded in active markets.  We invest only in AAA-rated, prime institutional money market funds, comprised of high quality, short-term fixed income securities. Our other long-term investments represent the fair value of investments under the Cabot Microelectronics Supplemental Employee Retirement Plan (SERP), which is a nonqualified supplemental savings plan.  The fair value of the investments is determined through quoted market prices within actively traded markets. Although the investments are allocated to individual participants and investment decisions are made solely by those participants, the SERP is a nonqualified plan.   Consequently, the Company owns the assets and the related offsetting liability for disbursement until a participant makes a qualifying withdrawal.  The long-term investment was adjusted to $1,371 in the second quarter of fiscal 2019 to reflect its fair value as of March 31, 2019.

Our derivative financial instruments include foreign exchange contracts and interest rate swap.  During the quarter, we entered into a floating-to-fixed interest rate swap agreement to hedge the variability in LIBOR-based interest payments on a portion of our outstanding variable rate debt.  The fair value of our derivative instruments is estimated using standard valuation models and market-based observable inputs over the contractual term, including one-month LIBOR-based yield curves for interest rate swap, and forward rates and/or the Overnight Index Swap (OIS) curve for forward foreign exchange contracts, among others.  We consider the risk of nonperformance, including counterparty credit risk, in the calculation of the fair value of derivative financial instruments.  See Note 11 of this Report on Form 10-Q for more information on our use of derivative financial instruments.

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INVENTORIES

6 Months Ended

Mar. 31, 2019

INVENTORIES [Abstract]

INVENTORIES

6. INVENTORIES

Inventories consisted of the following:

	March 31, 2019		September 30, 2018
Raw materials	$	58,496	$	35,150
Work in process		12,569		8,117
Finished goods		76,259		28,659
Total	$	147,324	$	71,926

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GOODWILL AND OTHER INTANGIBLE ASSETS

6 Months Ended

Mar. 31, 2019

GOODWILL AND OTHER INTANGIBLE ASSETS [Abstract]

GOODWILL AND OTHER INTANGIBLE ASSETS

7. GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill was $705,426 as of March 31, 2019, and $101,083 as of September 30, 2018.  The increase in goodwill was due to $604,510 in goodwill related to the acquisition of KMG offset by $167 in foreign exchange fluctuations.  The amount of goodwill assigned to each of the Electronic Materials and Performance Materials segments was $358,141 and $347,285, respectively.

The components of other intangible assets are as follows:

	March 31, 2019				September 30, 2018
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Other intangible assets subject to amortization:
Product technology, trade secrets and know-how	$	134,340	$	31,131	$	48,825	$	25,305
Acquired patents and licenses		10,570		8,315		8,270		8,252
Customer relationships, trade names, and distribution rights		739,560		37,816		28,068		17,574
Total other intangible assets subject to amortization		884,470		77,262		85,163		51,131
Other intangible assets not subject to amortization:
Other indefinite-lived intangibles*		47,170				1,170
Total other intangible assets not subject to amortization		47,170				1,170
Total other intangible assets	$	931,640	$	77,262	$	86,333	$	51,131

*Other indefinite-lived intangible assets not subject to amortization consist primarily of trade names.

As discussed in Note 4, we recorded $844,800 of intangible assets related to our acquisition of KMG.  The allocation of the amount into the various categories of intangible assets, as well as useful lives we have established, are discussed in Note 4.

Amortization expense on our intangible assets was $16,960 and $26,318 for the three and six months ended March 31, 2019, respectively, and was $1,963 and $3,936 for the three and six months ended March 31, 2018, respectively. Estimated future amortization expense for the five succeeding fiscal years is as follows:

Fiscal Year	Estimated Amortization Expense
Remainder of 2019	$	33,881
2020		87,936
2021		87,233
2022		79,822
2023		67,663

Goodwill and indefinite-lived intangible assets are tested for impairment annually in the fourth quarter of our fiscal year or more frequently if indicators of potential impairment exist, using a fair-value-based approach. The recoverability of goodwill is measured at the reporting unit level, which is defined as either an operating segment or one level below an operating segment. An entity has the option to assess the fair value of a reporting unit either using a qualitative analysis ("step zero") or a quantitative analysis ("step one"). Similarly, an entity has the option to use a step zero or a step one approach to determine the recoverability of indefinite-lived intangible assets. In 2018, we chose to use a step one analysis for both goodwill impairment and for indefinite-lived intangible asset impairment, with the exception of our CMP slurries reporting unit, for which we chose to use a step zero analysis for fiscal 2018.

We completed our annual impairment test during our fourth quarter of fiscal 2018 and concluded that no impairment existed.  There were no indicators of potential impairment during the quarter ended March 31, 2019, so it was not necessary to perform an impairment review for goodwill and indefinite-lived intangible assets during the quarter.  There have been no impairment charges recorded on the goodwill for any of our reporting units.

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OTHER LONG-TERM ASSETS

6 Months Ended

Mar. 31, 2019

OTHER LONG-TERM ASSETS [Abstract]

OTHER LONG-TERM ASSETS

8. OTHER LONG-TERM ASSETS

Other long-term assets consisted of the following:

	March 31, 2019		September 30, 2018
Long-term contract assets		1,024		1,548
Long-term SERP Investment		1,371		1,137
Prepaid unamortized debt issuance cost		795		-
Other long-term assets		3,025		1,979
Total	$	6,215	$	4,664

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ACCRUED EXPENSES, INCOME TAXES PAYABLE AND OTHER CURRENT LIABILITIES

6 Months Ended

Mar. 31, 2019

ACCRUED EXPENSES, INCOME TAXES PAYABLE AND OTHER CURRENT LIABILITIES [Abstract]

ACCRUED EXPENSES, INCOME TAXES PAYABLE AND OTHER CURRENT LIABILITIES

9. ACCRUED EXPENSES, INCOME TAXES PAYABLE AND OTHER CURRENT LIABILITIES

Accrued expenses, income taxes payable and other current liabilities consisted of the following:

	March 31, 2019		September 30, 2018
Accrued compensation	$	26,148	$	35,367
Income taxes payable		18,889		18,045
Dividends payable		12,742		10,822
Taxes, other than income taxes		6,530		1,976
Accrued interest		4,197		-
Contract liabilities		3,611		4,894
Goods and services received, not yet invoiced		4,260		1,954
Other accrued expenses		10,536		9,925
Total	$	86,913	$	82,983

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DEBT

6 Months Ended

Mar. 31, 2019

DEBT [Abstract]

DEBT

10. DEBT

On the Acquisition Date, we entered into the Credit Agreement by and among the Company, the lenders party thereto and JPMorgan Chase Bank, N.A., as administrative agent, which provides for senior secured financing of up to $1,265.0 million, consisting of the Term Loan Facility in an aggregate principal amount of $1,065.0 million and the Revolving Credit Facility in an aggregate principal amount of up to $200.0 million, including a letter of credit sub-facility of up to $50.0 million.  The Term Loan Facility and the Revolving Credit Facility are referred to as the “Credit Facilities.”

Proceeds of the loans borrowed under the Term Loan Facility on the Acquisition Date were used to fund, in part, the Acquisition and certain of KMG’s existing indebtedness, and to pay related fees and expenses. The Revolving Credit Facility remains undrawn.

The Credit Facilities are guaranteed by each of the Company’s wholly owned domestic subsidiaries, including KMG and its subsidiaries, and are secured by substantially all assets of the Company and of each subsidiary guarantor, in each case subject to certain exceptions.

Borrowings under the Credit Facilities bear interest at a rate per annum equal to, at the Company’s option, either (a) a LIBOR, subject to a 0.00% floor, or (b) a base rate, in each case plus an applicable margin of, in the case of borrowings under the Term Loan Facility, 2.25% for LIBOR loans and 1.25% for base rate loans and, in the case of borrowings under the Revolving Credit Facility, initially, 1.50% for LIBOR loans and 0.50% for base rate loans. The applicable margin for borrowings under the Revolving Credit Facility varies depending on the Company’s first lien secured net leverage ratio. The Company is also required to pay a commitment fee currently equal to 0.25% per annum to the lenders under the Revolving Credit Facility in respect of the unutilized commitments thereunder. The commitment fee under the Revolving Credit Facility varies depending on the Company’s first lien secured net leverage ratio.

The Term Loan Facility matures on November 15, 2025, the seven-year anniversary of the Acquisition Date, and amortizes in equal quarterly installments of 0.25% of the initial principal amount, starting with the first full fiscal quarter after the Acquisition Date. The Revolving Facility matures on November 15, 2023, the five-year anniversary of the Acquisition Date. In addition, the Company is required to prepay outstanding loans under the Term Loan Facility, subject to certain exceptions, with up to 50% of the Company’s annual excess cash flow, as defined under the Credit Agreement, and 100% of the net cash proceeds of certain recovery events and non-ordinary course asset sales.

The Company may generally prepay outstanding loans under the Credit Facilities at any time, without prepayment premium or penalty, subject to customary “breakage” costs with respect to LIBOR rate loans. Prepayments of the Term Loan Facility in connection with certain “repricing events” resulting in a lower yield occurring at any time during the first six months after the Acquisition Date must be accompanied by a 1.00% prepayment premium.  During this quarter we made a prepayment of $45.0million.  Subsequent to the end of the quarter ended March 31, 2019, we made an additional prepayment of $55.0million.

The Revolving Credit Facility requires that the Company maintain a maximum first lien secured net leverage ratio, as defined in the Credit Agreement, of 4.00 to 1.00 as of the last day of each fiscal quarter if any revolving loans are outstanding, commencing with the first full fiscal quarter after the Acquisition Date.

The Credit Agreement contains certain affirmative and negative covenants that limit the ability of the Company, among other things and subject to certain significant exceptions, to incur debt or liens, make investments, enter into certain mergers, consolidations, asset sales and acquisitions, pay dividends and make other restricted payments and enter into transactions with affiliates. We believe we are in compliance with these covenants.

The Credit Agreement contains certain events of default, including relating to a change of control. If an event of default occurs, the lenders under the Credit Facilities will be entitled to take various actions, including the acceleration of amounts due under the Credit Facilities.

At March 31, 2019, the fair value of the Term Loan Facility, using level 2 inputs, approximated its carrying value of $1,020,000 as the loan bears a floating market rate of interest. As of March 31, 2019, $13,313 of the debt outstanding was classified as short-term, and $19,411 of debt issuance costs related to our Term Loan were presented as a reduction of long-term debt.

In the second quarter of fiscal 2019, we entered into a floating-to-fixed interest rate swap agreement to hedge the variability in our LIBOR-based interest payments on approximately 70% of our Term Loan Facility balance.  See Note 11 on the Report on Form 10-Q for additional information.

Principal repayments of the Term Loan Facility are generally made on the last calendar day of each quarter if that day is considered to be a business day.  As of March 31, 2019, scheduled principal repayments of the Term Loan were as follows:

Fiscal Year	Principal Repayments
Remainder of 2019	$	7,988
2020		10,650
2021		10,650
2022		10,650
2023		10,650
Greater than 5 years		969,412
Total	$	1,020,000

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DERIVATIVE FINANCIAL INSTRUMENTS

6 Months Ended

Mar. 31, 2019

DERIVATIVE FINANCIAL INSTRUMENTS [Abstract]

DERIVATIVE FINANCIAL INSTRUMENTS

11. DERIVATIVE FINANCIAL INSTRUMENTS

We are exposed to various market risks, including risks associated with interest rates and foreign currency exchange rates.  We enter into certain derivative transactions to mitigate the volatility associated with these exposures.  We have policies in place that define acceptable instrument types we may enter into and we have established controls to limit our market risk exposure.  We do not use derivative financial instruments for trading or speculative purposes.  In addition, all derivatives, whether designated in hedging relationships or not, are required to be recorded on the Consolidated Balance Sheets at fair value on a gross basis.

Cash Flow Hedges - Interest Rate Swap Agreements

During the quarter, we entered into a floating-to-fixed interest rate swap agreement to hedge the variability in LIBOR-based interest payments on a portion of our outstanding variable rate debt.  As of March 31, 2019, the notional value of the swap was $746,000 and this value is scheduled to decrease bi-annually, and expire on January 31, 2024.

We have designated this swap agreement as a cash flow hedge pursuant to ASC 815, "Derivatives and Hedging".  Based on certain quantitative and qualitative assessments, we have determined that the hedge is highly effective and qualifies for hedge accounting.  Accordingly, unrealized gains and losses on the hedge are recorded in other comprehensive income.  Realized gains and losses are recorded on the same financial statement line as the hedged item, which is interest expense.

Foreign Currency Contracts Not Designated as Hedges

On a regular basis, we enter into forward foreign exchange contracts in an effort to mitigate the risks associated with currency fluctuations on certain foreign currency balance sheet exposures.  These foreign exchange contracts do not qualify for hedge accounting; therefore, the gains and losses resulting from the impact of currency exchange rate movements on our forward foreign exchange contracts are recognized as other income or expense in the accompanying consolidated income statements in the period in which the exchange rates change.  As of March 31, 2019 and September 30, 2018, the notional amounts of the forward contracts we held to purchase U.S. dollars in exchange for foreign currencies were $4,102 and $7,652, respectively, and the notional amounts of forward contracts we held to sell U.S. dollars in exchange for foreign currencies were $23,815 and $24,860, respectively.

Net Investment Hedge - Foreign Exchange Contracts

In September 2017, we entered into forward contracts to sell 100 billion Korean won and buy U.S. dollars, which we subsequently terminated in the third quarter of fiscal 2018. We had designated these forward contracts as effective net investment hedges. During the second quarter of fiscal 2018, the change in the fair value of these forward contracts in the net investment hedge relationship was $2,966, which was recorded in foreign currency translation adjustments within other comprehensive income.

The fair value of our derivative instruments included in the Consolidated Balance Sheets, which was determined using Level 2 inputs, was as follows:

		Asset Derivatives				Liability Derivatives
	Consolidated Balance Sheet Locatio	March 31, 2019		September 30, 2018		March 31, 2019		September 30, 2018
Derivatives designated as hedging instruments
Interest rate swap contract	Accrued expenses, income taxes payable and other current liabilities	$	-	$	-	$	781	$	-
	Other long-term liabilities		-		-	$	7,572	$	-
Derivatives not designated as hedging instruments
Foreign exchange contracts	Prepaid expenses and other current assets	$	-	$	-	$	-	$	-
	Accrued expenses, income taxes payable and other current liabilities	$	-	$	-	$	48	$	339

The following table summarizes the effect of our derivative instruments on our Consolidated Statements of Income for the three and six months ended March 31, 2019 and 2018:

		Gain (Loss) Recognized in Statement of Income
		Three Months Ended							Six Months Ended
	Statement of Income Location	March 31, 2019				March 31, 2018			March 31, 2019				March 31, 2018
Derivatives not designated as hedging instruments
Foreign exchange contracts	Other income (expense), net		$	(348	)		$	887		$	(38	)		$	78

The interest rate swap agreement has been deemed to be effective, and realized gains and losses were immaterial to our Consolidated Statement of Income.  We recorded an unrealized loss of $6,473, net of tax, in accumulated comprehensive income during the three and six months ended March 31, 2019 for this interest rate swap.  As of March 31, 2019, during the next 12 months, we expect approximately $781 to be reclassed from accumulated other comprehensive income into interest expense related to our interest rate swap based on projected rates of the LIBOR forward curve as of March 31, 2019.

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COMMITMENTS AND CONTINGENCIES

6 Months Ended

Mar. 31, 2019

COMMITMENTS AND CONTINGENCIES [Abstract]

COMMITMENTS AND CONTINGENCIES

12. COMMITMENTS AND CONTINGENCIES

LEGAL PROCEEDINGS

We periodically become a party to legal proceedings, arbitrations and regulatory proceedings (“contingencies”) arising in the ordinary course of our business operations. The ultimate resolution of these contingencies is subject to significant uncertainty, and should we fail to prevail in any of them or should several of them be resolved against us in the same reporting period, these matters could, individually or in the aggregate, be material to the consolidated financial statements. One of these contingencies, which we assumed in connection with our acquisition of KMG, is discussed below. The ultimate outcome of these matters, however, cannot be determined at this time, nor can the amount of any potential loss be reasonably estimated, and as a result except where indicated no amounts have been recorded in our consolidated financial statements.  The Company records legal costs associated with loss contingencies as expenses in the period in which they are incurred.

The United States Environmental Protection Agency (“EPA”) has notified KMG’s subsidiary, KMG-Bernuth, that the EPA considered it to be a potentially responsible party under the Comprehensive Environmental Response, Compensation and Liability Act of 1980, as amended (“CERCLA”) by virtue of its relationship with certain alleged predecessor companies, including Idacon, Inc. (f/k/a Sonford Chemical Company in connection with the Star Lake Canal Superfund Site near Beaumont, Texas. The EPA has estimated that the remediation will cost approximately $22.0 million. KMG and approximately seven other parties entered into an agreement with the EPA in September 2016 to complete a remedial design phase of the remediation of the site. The remediation work will be performed under a separate future agreement. Although KMG has not conceded liability, KMG established a reserve in connection with the remedial design, and as of March 31, 2019, the reserve remaining was $1,008.  We also may face other governmental or third-party claims, or otherwise incur costs, relating to cleanup of, or for injuries resulting from, contamination at sites associated with this or other past and present operations. We accrue for environmental liabilities when a determination can be made that they are probable and reasonably estimable.

Other than as described above, we are not involved in any legal proceedings that we believe could have a material impact on our consolidated financial position, results of operations or cash flows.

In addition, our Company is subject to extensive federal, state and local laws, regulations and ordinances in the U.S. and in other countries. These regulatory requirements relate to the use, generation, storage, handling, emission, transportation and discharge of certain hazardous materials, substances and waste into the environment.  The Company, including its KMG entities, manage Environmental, Health and Safety (“EHS”) matters related to protection of the environment and human health, the cleanup of contaminated sites, the treatment, storage and disposal of wastes, and the emission of substances into the air or waterways, among other EHS concerns.  Governmental authorities have the power to enforce compliance with their regulations, and violators may be subject to fines, injunctions or both. The Company devotes significant financial resources to compliance, including costs for ongoing compliance.

Certain licenses, permits and product registrations are required for the Company’s products and operations in the U.S., Mexico and other countries in which it does business. The licenses, permits and product registrations are subject to revocation, modification and renewal by governmental authorities.  In the U.S.  in particular, producers and distributors of pentachlorophenol (“penta”), which is a product manufactured and sold by a KMG subsidiary as part of the wood treatment business, are subject to registration and notification requirements under the Federal Insecticide, Fungicide and Rodenticide Act (“FIFRA”) and comparable state law in order to sell this product in the U.S. Compliance with these requirements may have a significant effect on our business, financial condition and results of operations.

We are subject to contingencies, including litigation relating to EHS laws and regulations, commercial disputes and other matters. Certain of these contingencies are discussed below. The ultimate resolution of these contingencies is subject to significant uncertainty, and should we fail to prevail in any of them or should several of them be resolved against us in the same reporting period, these matters could, individually or in the aggregate, be material to the consolidated financial statements. The ultimate outcome of these matters, however, cannot be determined at this time, nor can the amount of any potential loss be reasonably estimated, and as a result except where indicated no amounts have been recorded in our consolidated financial statements.  The Company records legal costs associated with loss contingencies as expenses in the period in which they are incurred.

Refer to Note 17 of “Notes to the Consolidated Financial Statements” in Item 8 of Part II of our Annual Report on Form 10-K for the fiscal year ended September 30, 2018, for additional information regarding commitments and contingencies.

POSTRETIREMENT OBLIGATIONS IN FOREIGN JURISDICTIONS

We have defined benefit plans covering employees in certain foreign jurisdictions as required by local law, which are unfunded. We adopted ASU 2017-07 during the first quarter of the fiscal year and pursuant to the adoption, net service costs are recorded as fringe benefit expense under cost of sales and operating expenses, and all other costs are recorded in the Other income (expense), net in our Consolidated Statements of Income.  The projected benefit obligations and accumulated benefit obligations under all such unfunded plans are updated annually during the fourth quarter of the fiscal year. Benefit payments under all such unfunded plans to be paid over the next ten years are expected to be approximately $7,906.  For more information regarding these plans, refer to Note 17 of “Notes to the Consolidated Financial Statements” included in Item 8 of Part II of our Annual Report on Form 10-K for the fiscal year ended September 30, 2018.

PURCHASE OBLIGATIONS

Purchase obligations include take-or-pay arrangements with suppliers, and purchase orders and other obligations entered into in the normal course of business regarding the purchase of goods and services.  We have been operating under a fumed silica supply agreement with Cabot Corporation, our former parent company which is not a related party, the current term of which runs through December 2019.  As of March 31, 2019, purchase obligations include $11,073 of contractual commitments related to our Cabot Corporation supply agreement for fumed silica.

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ACCUMULATED OTHER COMPREHENSIVE INCOME

6 Months Ended

Mar. 31, 2019

ACCUMULATED OTHER COMPREHENSIVE INCOME [Abstract]

ACCUMULATED OTHER COMPREHENSIVE INCOME

13. ACCUMULATED OTHER COMPREHENSIVE INCOME

The table below summarizes the components of accumulated other comprehensive income (AOCI), net of tax provision/(benefit), as of March 31, 2019 and 2018: 

	Foreign Currency Translation		Cash Flow Hedges			Pension and Other Postretirement Liabilities			Total
Balance at September 30, 2018	$	5,918	$	(17	)	$	(1,362	)	$	4,539
Foreign currency translation adjustment, net of tax of $(21)		1,433		-			-			1,433
Unrealized gain (loss) on cash flow hedges:
Change in fair value, net of tax of $(1,879)		-		(6,473	)		-			(6,473	)
Reclassification adjustment into earnings, net of tax of $0		-		(1	)		-			(1	)
Balance at March 31, 2019	$	7,351	$	(6,491	)	$	(1,362	)	$	(502	)

	Foreign Currency Translation		Cash Flow Hedges			Pension and Other Postretirement Liabilities			Total
Balance at September 30, 2017	$	5,239	$	46		$	(1,336	)	$	3,949
Foreign currency translation adjustment, net of tax of $(1,384)		11,105		-			-			11,105
Unrealized gain (loss) on cash flow hedges:
Change in fair value, net of tax of $57		-		165			-			165
Reclassification adjustment into earnings, net of tax of $(6)		-		(18	)		-			(18	)
Balance at March 31, 2018	$	16,344	$	193		$	(1,336	)	$	15,201

The before tax amount reclassified from AOCI to net income during the three and six months ended March 31, 2019 and 2018, related to cash flow hedges, were recorded as interest expense on our Consolidated Statement of Income.

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SHARE-BASED COMPENSATION PLANS

6 Months Ended

Mar. 31, 2019

SHARE-BASED COMPENSATION PLANS [Abstract]

SHARE-BASED COMPENSATION PLANS

14. SHARE-BASED COMPENSATION PLANS

We issue share-based awards under the following programs: our Cabot Microelectronics Corporation 2012 Omnibus Incentive Plan, as amended effective March 7, 2017 (OIP); our Cabot Microelectronics Corporation 2007 Employee Stock Purchase Plan, as Amended and Restated January 1, 2010 (ESPP); and, pursuant to the OIP, our Directors' Deferred Compensation Plan, as amended September 23, 2008 (DDCP), and our 2001 Executive Officer Deposit Share Program (DSP).  In March 2017, our stockholders reapproved the material terms of performance-based awards under the OIP for purposes of complying with Section 162(m) of the Internal Revenue Code of 1986, as amended.  For additional information regarding these programs, refer to Note 12 of "Notes to the Consolidated Financial Statements" included in Item 8 of Part II of our Annual Report on Form 10-K for the fiscal year ended September 30, 2018. 

We record share-based compensation expense for all share-based awards, including stock option grants, and restricted stock, restricted stock unit and performance share unit ("PSU") awards, and employee stock purchase plan purchases.  We calculate share-based compensation expense using the straight-line approach based on awards ultimately expected to vest, which requires the use of an estimated forfeiture rate.  Our estimated forfeiture rate is primarily based on historical experience, but may be revised in future periods if actual forfeitures differ from the estimate.  We use the Black-Scholes option-pricing model to estimate the grant date fair value of our stock options and employee stock purchase plan purchases.  This model requires the input of highly subjective assumptions, including the price volatility of the underlying stock, the expected term of our stock options, expected dividend yield and the risk-free interest rate.  We estimate the expected volatility of our stock options based on a combination of our stock's historical volatility and the implied volatilities from actively-traded options on our stock.  We calculate the expected term of our stock options using historical stock option exercise data, and for stock option grants made prior to December 2017, we have added a slight premium to this expected term for employees who meet the definition of retirement-eligible pursuant to their stock option grants during the contractual term of the grant.  As of December 2017, the provisions of stock option grants and restricted stock unit awards stated that, except in certain circumstances including termination for cause, once an employee meets the retirement eligibility requirements, any remaining unvested share-based awards will continue to vest regardless of termination of service. Consequently, the requisite service period for the award is satisfied upon retirement eligibility. Therefore, we record the total share-based compensation expense upon award for those employees who have met the retirement eligibility at the grant date. The expected dividend yield represents our annualized dividend in dollars divided by the stock price on the date of grant.  The risk-free interest rate is derived from the U.S. Treasury yield curve in effect at the time of grant.

The PSUs that have been awarded may be subject to downward or upward adjustment depending on the total shareholder return achieved by the Company during the particular performance period related to the PSUs, relative to the total shareholder return of an established market index.  We use a third-party service provider to estimate the fair value of the PSUs at grant date by using a Monte Carlo simulation model. This model simulates the stock price movements of the Company and Index constituents using certain assumptions, including the stock price of the Company and index constituents, the risk-free interest rate and stock price volatility.  Subsequent to the KMG acquisition, the performance metrics of the PSUs awarded in December 2017 were modified to reflect the performance results expected due to the Acquisition. We have applied modification accounting to account for the change in the related compensation cost and recorded a cumulative effect reduction in compensation cost of $778 during the three months ended March 31, 2019.

KMG awards granted subsequent to the entry into the definitive agreement, but prior to the Acquisition Date, were converted to our restricted stock units (“Replacement Award”), with vesting in three equal installments on the first three anniversaries of the original award date. If the recipient is terminated without cause or resigns with good reason during the 18 months following the Acquisition Date, the Replacement Award will vest as of such termination date in a number of shares equal to 150% of the Replacement Award. The share-based compensation expense related to the Replacement Awards, including accelerated vesting, was $3,253 in the first quarter of fiscal 2019 and not material in the second quarter of fiscal 2019. The expense was included in the table below.

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INCOME TAXES

6 Months Ended

Mar. 31, 2019

INCOME TAXES [Abstract]

INCOME TAXES

15. INCOME TAXES

The Company’s effective tax rate was 28.5% and 26.0% for the three and six months ended March 31, 2019, respectively, compared to a 19.6% and 63.8% effective income tax rate for the three and six months ended March 31, 2018.  The decrease in our effective tax rate for the six months ended March 31, 2019 compared to the prior year is primarily attributable to the changes introduced by the Tax Act enacted in December 2017.  Other factors that impacted the Company’s effective tax rate for the three and six months ended March 31, 2019 were primarily related to unfavorable tax treatment of certain KMG acquisition-related costs, such as compensation deduction limitations, as well as non-deductibility of certain professional fees.  Additionally, we recorded incremental tax expense for the Global Intangible Low Taxed Income (“GILTI”) provision of the Tax Act, which was effective for the first time during our fiscal 2019. Partially offsetting these adverse items, the Tax Act reduced the corporate income tax rate to 21.0%  effective January 1, 2018, resulting in a change in our blended tax rate of 24.5% in fiscal 2018 to 21.0% beginning with our fiscal 2019.  In the quarter ended December 31, 2018, the Company completed its provisional estimates with regard to the Tax Act and the Transition Tax and Withholding Tax obligations are now determined to be complete.

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EARNINGS PER SHARE

6 Months Ended

Mar. 31, 2019

EARNINGS PER SHARE [Abstract]

EARNINGS PER SHARE

16. EARNINGS PER SHARE

Basic earnings per share (EPS) is calculated by dividing net income available to common stockholders by the weighted-average number of common shares outstanding during the period, excluding the effects of unvested restricted stock awards that have a right to receive non-forfeitable dividends, which are considered participating securities as prescribed by the two-class method under ASC 260 “Earnings per Share”.  Beginning in the first quarter of fiscal 2019, the amount of participating securities was no longer material and therefore, we have excluded such securities from our calculation of EPS in fiscal 2019.  Diluted EPS is calculated in a similar manner, but the weighted-average number of common shares outstanding during the period is increased to include the weighted-average dilutive effect of “in-the-money” stock options and unvested restricted stock shares using the treasury stock method.

The standards of accounting for earnings per share require companies to provide a reconciliation of the numerator and denominator of the basic and diluted earnings per share computations.  Basic and diluted earnings per share were calculated as follows:

	Three Months Ended March 31,					Six Months Ended March 31,
	2019		2018			2019		2018
Numerator:
Net Income	$	27,137	$	29,737		$	40,580		26,654
Less: income attributable to participating securities		-		(30	)		-		(34	)
Earnings available to common shares	$	27,137	$	29,707		$	40,580		26,620
Denominator:
Weighted average common shares		28,997,632		25,592,508			28,065,759		25,473,757
(Denominator for basic calculation)
Weighted average effect of dilutive securities:
Share-based compensation		481,482		568,678			541,274		601,925
Diluted weighted average common shares		29,479,114		26,161,186			28,607,033		26,075,682
(Denominator for diluted calculation)
Earnings per share:
Basic	$	0.94	$	1.16		$	1.45		1.05
Diluted	$	0.92	$	1.14		$	1.42		1.02

Approximately 0.2 million shares for both the three and six months ended March 31, 2019 and 0.1 million shares for both the three and six months ended March 31, 2018, attributable to outstanding stock options were excluded from the calculation of diluted earnings per share.

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SEGMENT REPORTING

6 Months Ended

Mar. 31, 2019

SEGMENT REPORTING [Abstract]

SEGMENT REPORTING

17. SEGMENT REPORTING

We identify our segments based on our management structure and the financial information used by our chief executive officer, who is our chief operating decision maker, to assess segment performance and allocate resources among our operating units.  We historically have operated predominantly in one industry segment – the development, manufacture and sale of Chemical Mechanical Planarization (CMP) consumables products.  With our acquisition of KMG, we reassessed our operating and reportable segments, and determined that we now have the following two reportable segments:

Electronic Materials

Electronic Materials includes products and solutions for the semiconductor industry.  We manufacture and sell CMP consumables, including CMP slurries and polishing pad products, and high-purity process chemicals used to etch and clean silicon wafers in the production of semiconductors, photovoltaics (solar cells) and flat panel displays.

Performance Materials

Performance Materials includes pipeline performance products and services for oilfield energy industries, wood treatment products, and products and equipment used in the precision optics industry.

Beginning in fiscal 2019 and with the acquisition of KMG, our chief operating decision maker evaluates segment performance based upon revenue and segment adjusted EBITDA.  Segment adjusted EBITDA is defined as earnings before interest, income taxes, depreciation and amortization, adjusted for certain items that affect comparability from period to period.  These adjustments include items related to our acquisition of KMG, such as expenses incurred to complete the acquisition, integration-related expenses and impact of fair value adjustments to inventory acquired from KMG. We exclude these items from earnings when presenting our adjusted EBITDA measure because we believe they will be incurred infrequently and/or are otherwise not indicative of a segment's regular, ongoing operating performance. Adjusted EBITDA is also the basis of a performance metric for our fiscal 2019 Short-Term Incentive Program (STIP).  In addition, our chief operating decision maker does not use assets by segment to evaluate performance or allocate resources. Therefore, we do not disclose assets by segment.

Revenue from external customers and segment adjusted EBITDA were (in thousands):

	Three Months Ended March 31,						Six Months Ended March 31,
	2019			2018			2019			2018
Segment Revenue
Electronic Materials		$	212,846		$	136,103		$	403,462		$	269,417
Performance Materials			52,545			6,875			83,707			13,540
Total		$	265,391		$	142,978		$	487,169		$	282,957

	Three Months Ended March 31,						Six Months Ended March 31,
	2019			2018			2019			2018
Segment adjusted EBITDA:
Electronic Materials	$	74,910		$	52,285		$	149,735		$	105,181
Performance Materials		22,660			1,231			35,727			2,519
Unallocated corporate expenses		(12,052	)		(9,884	)		(23,094	)		(20,735	)
Interest income		568			1,156			1,587			2,107
Interest expense		(13,331	)		(1,158	)		(20,221	)		(2,290	)
Depreciation and amortization		(27,348	)		(6,638	)		(43,889	)		(13,138	)
Charge for fair value write-up of acquired inventory sold		(4,566	)		-			(14,827	)		-
Acquisition and integration related expenses		(2,904	)		-			(30,198	)		-
Income before income taxes	$	37,937		$	36,992		$	54,820		$	73,644

We began to manage and report our results under the new organizational structure in conjunction with the KMG acquisition in fiscal 2019 and have reflected this change for all historical periods presented. Since the two segments operate independently and serve different markets and customers, there are no sales between segments.  Revenue from external customers and segment adjusted EBITDA shown for Performance Materials for the quarter ended March 31, 2018 includes Cabot Microelectronics’ heritage QED business and an immaterial business that was sold in March 2018.  The adjustments to segment EBITDA for the three and six months ended March 31, 2019 represent addbacks of KMG acquisition and integration related expenses, and a charge for the write-up of inventory acquired from KMG to fair value, for inventory sold in the period.  There were no adjustments to segment EBITDA for the three months ended March 31, 2018.  Unallocated corporate expenses include expenses associated with executive leadership and public company costs, and the unallocated portions of corporate functions including finance, legal, human resources, information technology, and corporate development not directly attributable to a reportable segment.

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BACKGROUND AND BASIS OF PRESENTATION (Policies)

6 Months Ended

Mar. 31, 2019

BACKGROUND AND BASIS OF PRESENTATION [Abstract]

USE OF ESTIMATES

USE OF ESTIMATES

The preparation of financial statements and related disclosures in conformity with U.S. GAAP requires management to make judgments, assumptions and estimates that affect the amounts reported in the Consolidated Financial Statements and accompanying notes. The accounting estimates that require management's most difficult and subjective judgments include, but are not limited to, those estimates related to bad debt expense, inventory valuation, impairment of long-lived assets and investments, business combinations, goodwill, other intangible assets, share-based compensation, income taxes and contingencies. We base our estimates on historical experience, current conditions and on various other assumptions that we believe are reasonable under the circumstances. However, future events are subject to change and estimates and judgments routinely require adjustment. Actual results may differ from these estimates under different assumptions or conditions.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS (Policies)

6 Months Ended

Mar. 31, 2019

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS [Abstract]

REVENUE RECOGNITION

REVENUE RECOGNITION

As of October 1, 2018, the Company began applying the provisions of Accounting Standards Codification 606-10, “Revenue from Contracts with Customers” (“ASC 606”), and all related appropriate guidance using the modified retrospective method applied to those contracts which were not completed as of October 1, 2018.  The Company recognizes revenue under the core principle of depicting the transfer of control to the Company’s customers in an amount reflecting the consideration to which the Company expects to be entitled. In order to achieve that core principle, the Company applies the following five step approach: (1) identify the contract with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when a performance obligation is satisfied.

Upon adoption of ASC 606 we recognized a $933 decrease to the opening balance of retained earnings, net of tax, due to the cumulative impact of adopting the new revenue standards. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods.  The Company changed its accounting policy for revenue recognition for customer incentives that provide free products and tiered pricing.  For free products, the new revenue standards require that a portion of the transaction price be allocated to the free product and deferred until the product has been delivered.  We previously accrued for undelivered free product as a charge to cost of sales.  In prior fiscal years, in accordance with ASC 605, we did not consider prospective tiered pricing to represent a material right.

The cumulative effect of the changes made to our Consolidated Balance Sheet as of October 1, 2018 for the adoption of the new revenue standardswas as follows:

	Balance at September 30, 2018		Adjustments Due to ASC 606			Balance at October 1, 2018
Deferred income tax assets	$	5,840	$	261		$	6,101
Accrued expenses, income taxes payable and other current liabilities		82,983		(47	)		82,936
Other long-term liabilities		13,046		1,241			14,287
Retained earnings	$	471,673	$	(933	)	$	470,740

We have determined that the effect of applying the new revenue standards during the three and six months ended March 31, 2019 was immaterial to our financial statements compared to revenue guidance in effect before the adoption of the new revenue standards.  As a result, for the three and six months ended March 31, 2019, we are not disclosing the quantitative amount by which each financial statement line item is affected by the application of the new revenue standards.

As part of the adoption of ASU 606, the Company elected to use certain allowed practical expedients. For the Company’s contracts that have an original duration of one year or less as of the adoption date, the Company uses the practical expedient applicable to such contracts and does not consider the time value of money. Further, because of the short duration of these contracts, the Company has not disclosed the transaction price for the future performance obligations as of the end of each reporting period for contracts having an expected duration of one year or less.  See Note 3 of this Report on Form 10-Q for disaggregated revenue, the reconciliation of contract balances and transaction price allocation to remaining performance obligations for contracts expected to remain effective beyond one year.

Performance Obligations and Material Rights

At contract inception, the Company assesses the goods and services promised in its contracts with customers and identifies a performance obligation for each material promise to the customer.  A performance obligation is a promise in a contract to transfer a distinct good or service, or a bundle of goods or services, to the customer, and is the unit of accounting under ASC 606. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. A majority of the Company’s contracts have a single performance obligation which represents, in most cases, the products, equipment or services being sold to the customer. Some contracts include multiple performance obligations including prospective tiered price discounts or delivery of free product that we have concluded represents a material right. Contracts with prospective tiered price discounts require judgment in determining if that discount represents a material right.

Contracts vary in length and payment terms vary by the type and location of the Company’s customers and the products or services offered. However, the period of time between invoicing and when payment is due is typically not significant and has no significant financing components.  Customers pay in accordance with negotiated terms upon receipt of goods or completion of services.  For these contracts, the transaction price is determined upon establishment of the contract that contains the final terms of the sale, including the description, quantity, and price of goods or services purchased.  In certain instances, we receive consideration from a customer prior to transferring goods or services to the customer under the terms of a sales contract.  In such cases, we record deferred revenue until the performance obligation is satisfied, which represents a contract liability, and is included in the contract liabilities discussed in Note 3 of this Form 10-Q.

The Company recognizes revenue related to product sales at a point in time following the transfer of control of such products to the customer, which generally occurs upon shipment, or delivery depending on the terms of the underlying contracts. The Company considers control to have transferred upon shipment or delivery because the Company has a present right to payment at that time, the customer has legal title to the asset, the Company has transferred physical possession of the asset, and the customer has significant risks and rewards of ownership of the asset.  Revenue is recognized on consignment sales when control transfers to the customer, generally at the point of customer usage of the product. The Company also records revenue for services provided to the pipeline and oilfield energy industries.  These services include preventive maintenance, repair and specialized isolation sealing on pipelines and training. Revenue is recorded at a point in time when the services are completed as this is when right to payment and customer acceptance occurs.

For sales contracts that contain multiple performance obligations, the Company allocates the transaction price to each performance obligation identified in the contract based on relative standalone selling prices or estimates of such prices.  Standalone selling price, once established, is then used to allocate total consideration proportionally to the various performance obligations within a contract. Most contracts where we have determined there to be multiple performance obligations relate to where we have identified a material right to exist such that we provide prospective tiered pricing discounts or free product. When we invoice for products shipped under these contracts, we defer the revenue associated with these rights on the balance sheet as a contract liability. Revenue is recognized when the customer exercises the option to purchase goods at a discount in the case of the prospective tiered pricing discounts or when we ship the free product.

Variable Consideration

The primary type of variable consideration present in the Company’s contracts are rebates and early payment discounts, both of which are immaterial. Early payment discounts are offered on a limited basis and are not significant.  The Company also offers rebates based upon cumulative volume of purchases within a quarter and accrues for the rebate obligation within the quarter that the rebate is earned.  ASC 606 did not change the accounting for rebates under ASC 605.

Costs to Obtain and Fulfill a Contract

For certain contracts within the Performance Materials segment, commissions are paid to sales agents based upon a percentage of end-customer invoice value. Agents are paid the commissions after funds are received by the Company from its customers.  Under ASC 340, sales commissions are required to be capitalized and expensed over the associated contract period.  However, as a practical expedient, the Company does not capitalize commissions as the associated contracts are generally one year or less in duration. For shipping and handling activities performed after a customer obtains control of the goods, the Company has elected to account for these costs as activities to fulfill the promise to transfer the goods and included in cost of sales.

EFFECTS OF RECENT ACCOUNTING PRONOUNCEMENTS

EFFECTS OF RECENT ACCOUNTING PRONOUNCEMENTS

In February 2016, the FASB issued ASU No. 2016-02, "Leases" (Topic 842).  The provisions of ASU 2016-02 require a dual approach for lessee accounting under which a lessee would recognize a right-of-use asset and a corresponding lease liability.  Leases will be classified as either finance or operating leases.  For finance leases, a lessee will recognize interest expense and amortization of the right-of-use asset, and for operating leases, the lessee will recognize a straight-line total lease expense.  The guidance also requires qualitative and specific quantitative disclosures to supplement the amounts recorded in the financial statements, to afford better understanding of an entity's leasing activities, including any significant judgments and estimates.   The guidance was amended through various ASU's subsequent to ASU 2016-02, all of which will be effective for us beginning October 1, 2019, but early adoption is permitted.  We are currently evaluating the impact of implementation of this standard on our financial statements.

In June 2016, the FASB issued ASU No. 2016-13, "Measurement of Credit Losses on Financial Instruments" (Topic 326). The provisions of this standard require financial assets measured at amortized cost to be presented at the net amount expected to be collected. An allowance account would be established to present the net carrying value at the amount expected to be collected. ASU 2016-13 also provides that credit losses relating to available-for-sale debt securities should be recorded through an allowance for credit losses. ASU 2016-13 will be effective for us beginning October 1, 2020, but early adoption is permitted as of October 1, 2019. We are currently evaluating the impact of implementation of this standard on our financial statements.

In March 2017, the FASB issued ASU No. 2017-07 "Improving the Presentation of Net Period Pension Cost and Net Period Postretirement Benefit Cost" (Topic 715). The provisions of ASU 2017-07 provided specific guidance on the presentation of the components of net benefit cost.  We adopted this standard ASU 2017-07 effective October 1, 2018 and applied it retrospectively. Pursuant to the adoption, net service costs are recorded as fringe benefit expense under cost of sales and operating expenses, and all other costs are recorded in the Other income (expense), net in our Consolidated Statements of Income. The impact of the retrospective adoption in fiscal 2018 is not material.

In May 2017, the FASB issued ASU No. 2017-09 "Scope of Modification Accounting" (Topic 718). The provisions of ASU 2017-09 provide specific guidance about which changes to the term or conditions of a share-based payment require an entity to apply modification accounting.  We adopted ASU 2017-09 effective October 1, 2018 and will apply this new standard to the share-based compensation awards, to the extent modified.

In August 2017, the FASB issued ASU No. 2017-12 "Derivatives and Hedging" (Topic 815). The provisions of this standard amend the hedge accounting model in ASC 815 to expand an entity's ability to hedge nonfinancial and financial risk components, reduce complexity in fair value hedges of interest rate risk, eliminate the requirement to separately measure and report hedge ineffectiveness, and generally require the entire change in the fair value of a hedging instrument to be presented in the same income statement line as the hedged item. The guidance also eases certain documentation and assessment requirements and modifies the accounting for components excluded from the assessment of hedge effectiveness.  We early adopted this guidance effective January 1, 2019, and we did not have any hedges that existed as of the initial application date.  We applied the new guidance to the interest rate swap that we entered into during our second quarter of fiscal 2019. Pursuant to the guidance, we performed initial quantitative hedge effectiveness testing upon the hedge inception, and determined the hedge to be highly effective.  Therefore, unrealized changes in fair value are recorded in other comprehensive income.  In addition, we reclassify the realized gains and losses out of other comprehensive income, and into interest expense in our Consolidated Statements of Income, which is the same financial statement line as the hedged item.  We will perform subsequent assessments of hedge effectiveness qualitatively on a quarterly basis.

In February 2018, the FASB issued ASU No. 2018-02 "Income Statement – Reporting Comprehensive Income (Topic 220)".  The amendments in this standard allow a company to reclassify the stranded tax effects resulting from the Tax Cuts and Jobs Act (the "Tax Act") from accumulated other comprehensive income to retained earnings. ASU 2018-02 will be effective for us beginning October 1, 2019, but early adoption is permitted. We are currently evaluating the impact of implementation of this standard on our financial statements.

In June 2018, the FASB issued ASU No. 2018-07 " Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting".  The ASU simplified the accounting for share-based payments granted to nonemployees for goods and services, therefore guidance on such payments to nonemployees would be mostly aligned with the requirements for share-based payments granted to employees. ASU 2018-07 will be effective for us beginning October 1, 2019, but early adoption is permitted (but no earlier than the adoption date of Topic 606). We are currently evaluating the impact of implementation of this standard on our financial statements.

In August 2018, the FASB issued ASU No. 2018-13 " Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement".  The ASU provides specific guidance on various disclosure requirements in Topic 820, including removal, modification and addition to current disclosure requirements. ASU 2018-13 will be effective for us beginning October 1, 2020, but early adoption is permitted. We are currently evaluating the impact of implementation of this standard on our disclosures.

In August 2018, the FASB issued ASU No. 2018-15 " Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force)".  The ASU Requires an entity (customer) in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which implementation costs to capitalize as an asset related to the service contract and which costs to expense. ASU 2018-15 will be effective for us beginning October 1, 2020, but early adoption is permitted. We are currently evaluating the impact of implementation of this standard on our financial statements.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS (Tables)

6 Months Ended

Mar. 31, 2019

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS [Abstract]

Cumulative Effect Adoption of ASC 606 on Balance Sheet

The cumulative effect of the changes made to our Consolidated Balance Sheet as of October 1, 2018 for the adoption of the new revenue standardswas as follows:

	Balance at September 30, 2018		Adjustments Due to ASC 606			Balance at October 1, 2018
Deferred income tax assets	$	5,840	$	261		$	6,101
Accrued expenses, income taxes payable and other current liabilities		82,983		(47	)		82,936
Other long-term liabilities		13,046		1,241			14,287
Retained earnings	$	471,673	$	(933	)	$	470,740

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REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables)

6 Months Ended

Mar. 31, 2019

REVENUE FROM CONTRACTS WITH CUSTOMERS [Abstract]

Disaggregation of Revenue

The following table shows revenue generated by product area during the three and six months ended March 31, 2019 and 2018:

	Three Months Ended March 31,				Six Months Ended March 31,
	2019		2018		2019		2018
Revenue:
Electronic Materials:
CMP Slurries	$	110,299	$	115,086	$	236,627	$	229,522
Electronic Chemicals		78,549		-		118,371		-
CMP Pads		23,998		21,017		48,464		39,895
Total Electronic Materials		212,846		136,103		403,462		269,417
Performance Materials		52,545		6,875		83,707		13,540
Total revenue	$	265,391	$	142,978	$	487,169	$	282,957

Reconciliation of Contract Balances

Reconciliation of Contract Liability Balances

The following table provides information about contract liability balances:

	March 31, 2019		October 1, 2018
Contract liabilities (current)	$	3,611	$	5,310
Contract liabilities (noncurrent)		1,414		1,239

Transaction Price Allocated to Remaining Performance Obligations

Transaction Price Allocated to Remaining Performance Obligations

The table below discloses (1) the aggregate amount of the transaction price allocated to performance obligations that are unsatisfied (or partially unsatisfied) as of the end of the reporting period for contracts with an original duration of greater than one year and (2) when the Company expects to recognize this revenue.

	Less Than 1 Year			1-3 Years			3-5 Years			Total
Revenue expected to be recognized on contract liability amounts as of March 31, 2019		$	87		$	1,085		$	329		$	1,501

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BUSINESS COMBINATION (Tables)

6 Months Ended

Mar. 31, 2019

BUSINESS COMBINATION [Abstract]

Total Consideration Compromises

	Amount
Total cash consideration paid for KMG outstanding common stock and equity awards	$	900,756
Cash provided to payoff KMG debt		304,648
Total cash consideration paid		1,205,404
Fair value of Cabot Microelectronics common stock issued for KMG outstanding common stock and equity awards		331,048
Total consideration transferred	$	1,536,452

Assets Acquired and Liabilities Assumed

The following table summarizes the preliminary allocation of fair values of assets acquired and liabilities assumed as of Acquisition Date:

Cash	$	23,217
Accounts receivable		64,711
Inventories		68,963
Prepaid expenses and other current assets		14,798
Property, plant and equipment		149,504
Intangible assets		844,800
Other long-term assets		6,208
Accounts payable		(28,894	)
Accrued expenses and other current liabilities		(43,451	)
Deferred income taxes liabilities		(164,469	)
Other long-term liabilities		(3,754	)
Total identifiable net assets acquired		931,633
Goodwill		604,819
Total consideration transferred	$	1,536,452

Identifiable Intangible Assets

The following table sets forth the components of identifiable intangible assets acquired and their estimated useful lives as of the Acquisition Date:

	Fair Value		Estimated Useful Life (years)
Customer relationships	$	704,000		15-20
Technology and know-how		85,500		9-11
Trade name - Flowchem		46,000	Indefinite
Trade name - all other		7,000		1-15
EPA product registration rights		2,300		15
Total intangible assets	$	844,800

Pro Forma Combined Results of Operations

The following unaudited supplemental pro forma information summarizes the combined results of operations for Cabot Microelectronics and KMG as if the Acquisition had occurred on October 1, 2017.

	Three Months Ended March 31,				Six Months Ended March 31,
	2019		2018		2019		2018
Revenues	$	265,391	$	259,372	$	549,147	$	512,105
Net income (loss)		28,056		24,902		66,873		(38,262	)
Earnings per share - basic	$	0.97	$	0.86	$	2.32	$	(1.33	)
Earnings per share - diluted	$	0.95	$	0.85	$	2.27	$	(1.33	)

The following costs are included in the three and six months ended March 31, 2018:

● Non-recurring transaction costs of $580 and $30,610, respectively.

● Non-recurring transaction-related employee costs, such as accelerated stock compensation expense, retention and severance    expense of $460 and $35,601, respectively.

● Non-recurring charge for fair value write-up of inventory sold of $1,045 and $14,859, respectively.

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FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

6 Months Ended

Mar. 31, 2019

FAIR VALUE OF FINANCIAL INSTRUMENTS [Abstract]

Fair Value of Financial Instruments

The following table presents financial instruments, other than long-term debt, that we measured at fair value on a recurring basis at March 31, 2019 and September 30, 2018.  See Note 10 for a detailed discussion of our long-term debt.  We have classified the following assets and liabilities in accordance with the fair value hierarchy set forth in the applicable standards.  In instances where the inputs used to measure the fair value of an asset fall into more than one level of the hierarchy, we have classified them based on the lowest-level input that is significant to the determination of the fair value. 

March 31, 2019	Level 1		Level 2		Level 3		Total Fair Value
Assets:
Cash and cash equivalents	$	192,260	$	-	$	-	$	192,260
Other long-term investments		1,371		-		-		1,371
Total assets	$	193,631	$	-	$	-	$	193,631
Liabilities:
Derivative financial instruments		-		8,401		-		8,401
Total liabilities	$	-	$	8,401	$	-	$	8,401

September 30, 2018	Level 1		Level 2		Level 3		Total Fair Value
Assets:
Cash and cash equivalents	$	352,921	$	-	$	-	$	352,921
Other long-term investments		1,137		-		-		1,137
Total assets	$	354,058	$	-	$	-	$	354,058
Liabilities:
Derivative financial instruments		-		339		-		339
Total liabilities	$	-	$	339	$	-	$	339

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INVENTORIES (Tables)

6 Months Ended

Mar. 31, 2019

INVENTORIES [Abstract]

Inventories

Inventories consisted of the following:

	March 31, 2019		September 30, 2018
Raw materials	$	58,496	$	35,150
Work in process		12,569		8,117
Finished goods		76,259		28,659
Total	$	147,324	$	71,926

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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

6 Months Ended

Mar. 31, 2019

GOODWILL AND OTHER INTANGIBLE ASSETS [Abstract]

Other Intangible Assets

The components of other intangible assets are as follows:

	March 31, 2019				September 30, 2018
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Other intangible assets subject to amortization:
Product technology, trade secrets and know-how	$	134,340	$	31,131	$	48,825	$	25,305
Acquired patents and licenses		10,570		8,315		8,270		8,252
Customer relationships, trade names, and distribution rights		739,560		37,816		28,068		17,574
Total other intangible assets subject to amortization		884,470		77,262		85,163		51,131
Other intangible assets not subject to amortization:
Other indefinite-lived intangibles*		47,170				1,170
Total other intangible assets not subject to amortization		47,170				1,170
Total other intangible assets	$	931,640	$	77,262	$	86,333	$	51,131

Estimated Future Amortization Expense for the Succeeding Five Fiscal Years

Amortization expense on our intangible assets was $16,960 and $26,318 for the three and six months ended March 31, 2019, respectively, and was $1,963 and $3,936 for the three and six months ended March 31, 2018, respectively. Estimated future amortization expense for the five succeeding fiscal years is as follows:

Fiscal Year	Estimated Amortization Expense
Remainder of 2019	$	33,881
2020		87,936
2021		87,233
2022		79,822
2023		67,663

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OTHER LONG-TERM ASSETS (Tables)

6 Months Ended

Mar. 31, 2019

OTHER LONG-TERM ASSETS [Abstract]

Other Long Term Assets

Other long-term assets consisted of the following:

	March 31, 2019		September 30, 2018
Long-term contract assets		1,024		1,548
Long-term SERP Investment		1,371		1,137
Prepaid unamortized debt issuance cost		795		-
Other long-term assets		3,025		1,979
Total	$	6,215	$	4,664

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ACCRUED EXPENSES, INCOME TAXES PAYABLE AND OTHER CURRENT LIABILITIES (Tables)

6 Months Ended

Mar. 31, 2019

ACCRUED EXPENSES, INCOME TAXES PAYABLE AND OTHER CURRENT LIABILITIES [Abstract]

Accrued Expenses, Income Taxes Payable and Other Current Liabilities

Accrued expenses, income taxes payable and other current liabilities consisted of the following:

	March 31, 2019		September 30, 2018
Accrued compensation	$	26,148	$	35,367
Income taxes payable		18,889		18,045
Dividends payable		12,742		10,822
Taxes, other than income taxes		6,530		1,976
Accrued interest		4,197		-
Contract liabilities		3,611		4,894
Goods and services received, not yet invoiced		4,260		1,954
Other accrued expenses		10,536		9,925
Total	$	86,913	$	82,983

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DEBT (Tables)

6 Months Ended

Mar. 31, 2019

DEBT [Abstract]

Schedule of Principal Repayments of Term Loan

Principal repayments of the Term Loan Facility are generally made on the last calendar day of each quarter if that day is considered to be a business day.  As of March 31, 2019, scheduled principal repayments of the Term Loan were as follows:

Fiscal Year	Principal Repayments
Remainder of 2019	$	7,988
2020		10,650
2021		10,650
2022		10,650
2023		10,650
Greater than 5 years		969,412
Total	$	1,020,000

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DERIVATIVE FINANCIAL INSTRUMENTS (Tables)

6 Months Ended

Mar. 31, 2019

DERIVATIVE FINANCIAL INSTRUMENTS [Abstract]

Fair Value of Derivative Instruments in the Consolidated Balance Sheet

The fair value of our derivative instruments included in the Consolidated Balance Sheets, which was determined using Level 2 inputs, was as follows:

		Asset Derivatives				Liability Derivatives
	Consolidated Balance Sheet Locatio	March 31, 2019		September 30, 2018		March 31, 2019		September 30, 2018
Derivatives designated as hedging instruments
Interest rate swap contract	Accrued expenses, income taxes payable and other current liabilities	$	-	$	-	$	781	$	-
	Other long-term liabilities		-		-	$	7,572	$	-
Derivatives not designated as hedging instruments
Foreign exchange contracts	Prepaid expenses and other current assets	$	-	$	-	$	-	$	-
	Accrued expenses, income taxes payable and other current liabilities	$	-	$	-	$	48	$	339

Effect of Derivative Instruments on the Consolidated Statement of Income

The following table summarizes the effect of our derivative instruments on our Consolidated Statements of Income for the three and six months ended March 31, 2019 and 2018:

		Gain (Loss) Recognized in Statement of Income
		Three Months Ended							Six Months Ended
	Statement of Income Location	March 31, 2019				March 31, 2018			March 31, 2019				March 31, 2018
Derivatives not designated as hedging instruments
Foreign exchange contracts	Other income (expense), net		$	(348	)		$	887		$	(38	)		$	78

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ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)

6 Months Ended

Mar. 31, 2019

ACCUMULATED OTHER COMPREHENSIVE INCOME [Abstract]

Accumulated Other Comprehensive Income

The table below summarizes the components of accumulated other comprehensive income (AOCI), net of tax provision/(benefit), as of March 31, 2019 and 2018: 

	Foreign Currency Translation		Cash Flow Hedges			Pension and Other Postretirement Liabilities			Total
Balance at September 30, 2018	$	5,918	$	(17	)	$	(1,362	)	$	4,539
Foreign currency translation adjustment, net of tax of $(21)		1,433		-			-			1,433
Unrealized gain (loss) on cash flow hedges:
Change in fair value, net of tax of $(1,879)		-		(6,473	)		-			(6,473	)
Reclassification adjustment into earnings, net of tax of $0		-		(1	)		-			(1	)
Balance at March 31, 2019	$	7,351	$	(6,491	)	$	(1,362	)	$	(502	)

	Foreign Currency Translation		Cash Flow Hedges			Pension and Other Postretirement Liabilities			Total
Balance at September 30, 2017	$	5,239	$	46		$	(1,336	)	$	3,949
Foreign currency translation adjustment, net of tax of $(1,384)		11,105		-			-			11,105
Unrealized gain (loss) on cash flow hedges:
Change in fair value, net of tax of $57		-		165			-			165
Reclassification adjustment into earnings, net of tax of $(6)		-		(18	)		-			(18	)
Balance at March 31, 2018	$	16,344	$	193		$	(1,336	)	$	15,201

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SHARE-BASED COMPENSATION PLANS (Tables)

6 Months Ended

Mar. 31, 2019

SHARE-BASED COMPENSATION PLANS [Abstract]

Share Based Compensation Expense

Share-based compensation expense for the three and six months ended March 31, 2019 and 2018, was as follows:

	Three Months Ended March 31,						Six Months Ended March 31,
	2019			2018			2019			2018
Cost of sales	$	574		$	567		$	1,629		$	1,354
Research, development and technical		442			516			1,343			1,046
Selling, general and administrative		2,522			3,201			8,736			7,704
Total share-based compensation expense		3,538			4,284			11,708			10,104
Tax benefit		(761	)		(1,022	)		(2,452	)		(2,249	)
Total share-based compensation expense, net of tax	$	2,777		$	3,262		$	9,256		$	7,855

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EARNINGS PER SHARE (Tables)

6 Months Ended

Mar. 31, 2019

EARNINGS PER SHARE [Abstract]

Basic and Diluted Earnings per Share

The standards of accounting for earnings per share require companies to provide a reconciliation of the numerator and denominator of the basic and diluted earnings per share computations.  Basic and diluted earnings per share were calculated as follows:

	Three Months Ended March 31,					Six Months Ended March 31,
	2019		2018			2019		2018
Numerator:
Net Income	$	27,137	$	29,737		$	40,580		26,654
Less: income attributable to participating securities		-		(30	)		-		(34	)
Earnings available to common shares	$	27,137	$	29,707		$	40,580		26,620
Denominator:
Weighted average common shares		28,997,632		25,592,508			28,065,759		25,473,757
(Denominator for basic calculation)
Weighted average effect of dilutive securities:
Share-based compensation		481,482		568,678			541,274		601,925
Diluted weighted average common shares		29,479,114		26,161,186			28,607,033		26,075,682
(Denominator for diluted calculation)
Earnings per share:
Basic	$	0.94	$	1.16		$	1.45		1.05
Diluted	$	0.92	$	1.14		$	1.42		1.02

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SEGMENT REPORTING (Tables)

6 Months Ended

Mar. 31, 2019

SEGMENT REPORTING [Abstract]

Segment Revenue

Revenue from external customers and segment adjusted EBITDA were (in thousands):

	Three Months Ended March 31,						Six Months Ended March 31,
	2019			2018			2019			2018
Segment Revenue
Electronic Materials		$	212,846		$	136,103		$	403,462		$	269,417
Performance Materials			52,545			6,875			83,707			13,540
Total		$	265,391		$	142,978		$	487,169		$	282,957

Segment Adjusted EBITDA

	Three Months Ended March 31,						Six Months Ended March 31,
	2019			2018			2019			2018
Segment adjusted EBITDA:
Electronic Materials	$	74,910		$	52,285		$	149,735		$	105,181
Performance Materials		22,660			1,231			35,727			2,519
Unallocated corporate expenses		(12,052	)		(9,884	)		(23,094	)		(20,735	)
Interest income		568			1,156			1,587			2,107
Interest expense		(13,331	)		(1,158	)		(20,221	)		(2,290	)
Depreciation and amortization		(27,348	)		(6,638	)		(43,889	)		(13,138	)
Charge for fair value write-up of acquired inventory sold		(4,566	)		-			(14,827	)		-
Acquisition and integration related expenses		(2,904	)		-			(30,198	)		-
Income before income taxes	$	37,937		$	36,992		$	54,820		$	73,644

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BACKGROUND AND BASIS OF PRESENTATION (Details) - Segment	3 Months Ended	6 Months Ended
	Mar. 31, 2019	Mar. 31, 2019
BACKGROUND AND BASIS OF PRESENTATION [Abstract]
Number of reportable segments	2	2

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Deferred income tax assets	$ 5,498	$ 5,840
Accrued expenses, income taxes payable and other current liabilities	86,913	82,983
Other long-term liabilities	25,814	13,046
Retained earnings	$ 487,467	471,673
ASU 2014-09 [Member] | Adjustments Due to ASU 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Deferred income tax assets		261
Accrued expenses, income taxes payable and other current liabilities		(47)
Other long-term liabilities		1,241
Retained earnings		(933)
ASU 2014-09 [Member] | Effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Deferred income tax assets		6,101
Accrued expenses, income taxes payable and other current liabilities		82,936
Other long-term liabilities		14,287
Retained earnings		$ 470,740

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REVENUE FROM CONTRACTS WITH CUSTOMERS, Disaggregation of Revenue (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019 USD ($) Segment	Mar. 31, 2018 USD ($)	Mar. 31, 2019 USD ($) Segment	Mar. 31, 2018 USD ($)
REVENUE FROM CONTRACTS WITH CUSTOMERS [Abstract]
Number of reportable segments | Segment	2		2
Disaggregation of Revenue [Abstract]
Total revenue	$ 265,391	$ 142,978	$ 487,169	$ 282,957
Electronic Materials [Member]
Disaggregation of Revenue [Abstract]
Total revenue	212,846	136,103	403,462	269,417
Electronic Materials [Member] | CMP Slurries [Member]
Disaggregation of Revenue [Abstract]
Total revenue	110,299	115,086	236,627	229,522
Electronic Materials [Member] | Electronic Chemicals [Member]
Disaggregation of Revenue [Abstract]
Total revenue	78,549	0	118,371	0
Electronic Materials [Member] | CMP Pads [Member]
Disaggregation of Revenue [Abstract]
Total revenue	23,998	21,017	48,464	39,895
Performance Materials [Member]
Disaggregation of Revenue [Abstract]
Total revenue	$ 52,545	$ 6,875	$ 83,707	$ 13,540

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REVENUE FROM CONTRACTS WITH CUSTOMERS, Transaction Price Allocated to Remaining Performance Obligations (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Revenue, Performance Obligation [Abstract]
Revenue expected to be recognized on contract liability amounts as of end of period	$ 1,501
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Performance Obligation [Abstract]
Revenue expected to be recognized on contract liability amounts as of end of period	$ 87
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01 | Maximum [Member]
Revenue, Performance Obligation [Abstract]
Revenue expected to be recognized on contract liability, satisfaction period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Performance Obligation [Abstract]
Revenue expected to be recognized on contract liability amounts as of end of period	$ 1,085
Revenue expected to be recognized on contract liability, satisfaction period	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Performance Obligation [Abstract]
Revenue expected to be recognized on contract liability amounts as of end of period	$ 329
Revenue expected to be recognized on contract liability, satisfaction period	3 years

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REVENUE FROM CONTRACTS WITH CUSTOMERS, Reconciliation of Contract Balances (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2019	Mar. 31, 2019	Sep. 30, 2018
Contract with Customer, Liability [Abstract]
Contract liabilities (current)	$ 3,611	$ 3,611	$ 5,310
Contract liabilities (noncurrent)	1,414	1,414	$ 1,239
Change in Contract with Customer, Liability [Abstract]
Revenue recognized in contract liability	$ 2,317	$ 4,160

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BUSINESS COMBINATION (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended				6 Months Ended
	Nov. 15, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2018
Business combination disclosure [Abstract]
Acquisition of business, net of cash acquired						$ 1,182,186	$ 0
Face amount of debt	$ 1,265,000
Total consideration [Abstract]
Fair value of Cabot Microelectronics common stock issued for KMG outstanding common stock and equity awards						331,048	0
Fair values of assets acquired and liabilities assumed [Abstract]
Goodwill		$ 705,426				705,426		$ 101,083
Net income		27,137	$ 13,443	$ 29,737	$ (3,083)	40,580	26,654
Non-recurring costs [Abstract]
Share-based compensation expense						11,708	10,082
Fair value write-up of inventory sold		4,566		0		14,827	0
Acquisition-related Costs [Member]
Fair values of assets acquired and liabilities assumed [Abstract]
Transaction and acquisition-related expenses		580				30,610
Non-recurring costs [Abstract]
Transaction costs		580				30,610
Share-based compensation expense				460			35,601
Fair Value Write-up of Inventory Sold [Member]
Non-recurring costs [Abstract]
Fair value write-up of inventory sold				1,045			14,859
Revolving Credit Facility [Member]
Business combination disclosure [Abstract]
Face amount of debt	200,000
Line of credit facility, borrowing capacity	200,000
Term Loan [Member]
Business combination disclosure [Abstract]
Face amount of debt	$ 1,065,000
Selling, general, and administrative [Member]
Fair values of assets acquired and liabilities assumed [Abstract]
Transaction and acquisition-related expenses		2,904				30,198
Non-recurring costs [Abstract]
Transaction costs		2,904				30,198
Cost of Sales [Member]
Fair values of assets acquired and liabilities assumed [Abstract]
Transaction and acquisition-related expenses		4,566				14,827
Non-recurring costs [Abstract]
Transaction costs		4,566				14,827
Electronic Materials [Member]
Fair values of assets acquired and liabilities assumed [Abstract]
Goodwill		358,141				358,141
Performance Materials [Member]
Fair values of assets acquired and liabilities assumed [Abstract]
Goodwill		347,285				347,285
KMG [Member]
Business combination disclosure [Abstract]
Business acquisition, percentage of voting interests acquired	100.00%
Acquisition of business, net of cash acquired	$ 1,513,235
Cash acquired from acquisition	$ 23,217
Amount received for each share of KMG common stock (in dollars per share)	$ 55.65
Business Acquisition Share Percentage	0.2000
Shares issued to acquire entity	3,237,005
Business Acquisition, Share Price	$ 102.27
Face amount of debt	$ 1,065,000
Line of credit facility, borrowing capacity	200,000
Debt Issuance Costs, Net	21,408
Total consideration [Abstract]
Cash provided to payoff KMG debt	304,648
Total cash consideration paid	1,205,404
Total consideration transferred	1,536,452
Fair values of assets acquired and liabilities assumed [Abstract]
Cash	23,217
Accounts receivable	64,711
Inventories	68,963
Prepaid expenses and other current assets	14,798
Property, plant and equipment	149,504
Intangible assets	844,800
Other long-term assets	6,208
Accounts payable	(28,894)
Accrued expenses and other current liabilities	(43,451)
Deferred tax liabilities	(164,469)
Other long-term liabilities	(3,754)
Total identifiable net assets acquired	931,633
Goodwill	604,819
Total	1,536,452
Net sales						185,127
Net income		5,561
Transaction and acquisition-related expenses	19,996
Non-recurring costs [Abstract]
Transaction costs	19,996
Business acquisition, pro forma information [Abstract]
Revenue		265,391		259,372		549,147	512,105
Net income		$ 28,056		$ 24,902		$ 66,873	$ (38,262)
Earnings per share - basic (in dollars per share)		$ 0.97		$ 0.86		$ 2.32	$ (1.33)
Earnings per share - diluted (in dollars per share)		$ 0.95		$ 0.85		$ 2.27	$ (1.33)
Intangible assets acquired [Abstract]
Fair value	$ 844,800
Weighted average useful life	17 years 10 months 24 days
KMG [Member] | Revolving Credit Facility [Member]
Business combination disclosure [Abstract]
Debt Issuance Costs, Net	$ 859
KMG [Member] | Term Loan [Member]
Business combination disclosure [Abstract]
Debt Issuance Costs, Net	20,549
KMG [Member] | Electronic Materials [Member]
Fair values of assets acquired and liabilities assumed [Abstract]
Goodwill	262,746
KMG [Member] | Performance Materials [Member]
Fair values of assets acquired and liabilities assumed [Abstract]
Goodwill	342,073
KMG [Member] | Customer Relationships [Member]
Intangible assets acquired [Abstract]
Fair value	704,000
KMG [Member] | Customer Relationships [Member] | Minimum [Member]
Intangible assets acquired [Abstract]
Estimated useful lives						15 years
KMG [Member] | Customer Relationships [Member] | Maximum [Member]
Intangible assets acquired [Abstract]
Estimated useful lives						20 years
KMG [Member] | Technology and Know-how [Member]
Intangible assets acquired [Abstract]
Fair value	85,500
KMG [Member] | Technology and Know-how [Member] | Minimum [Member]
Intangible assets acquired [Abstract]
Estimated useful lives						9 years
KMG [Member] | Technology and Know-how [Member] | Maximum [Member]
Intangible assets acquired [Abstract]
Estimated useful lives						11 years
KMG [Member] | Trade Name - Flowchem [Member]
Intangible assets acquired [Abstract]
Fair value	46,000
KMG [Member] | Trade Name - All Other [Member]
Intangible assets acquired [Abstract]
Fair value	7,000
KMG [Member] | Trade Name - All Other [Member] | Minimum [Member]
Intangible assets acquired [Abstract]
Estimated useful lives						1 year
KMG [Member] | Trade Name - All Other [Member] | Maximum [Member]
Intangible assets acquired [Abstract]
Estimated useful lives						15 years
KMG [Member] | EPA Product Registration Rights [Member]
Intangible assets acquired [Abstract]
Fair value	2,300
Estimated useful lives						15 years
KMG [Member] | Common Stock and Equity Awards [Member]
Total consideration [Abstract]
Total cash consideration paid	900,756
Fair value of Cabot Microelectronics common stock issued for KMG outstanding common stock and equity awards	$ 331,048

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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - Recurring [Member] - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Assets [Abstract]
Cash and cash equivalents	$ 192,260	$ 352,921
Other long-term investments	1,371	1,137
Total assets	193,631	354,058
Liabilities [Abstract]
Derivative financial instruments	8,401	339
Total liabilities	8,401	339
Level 1 [Member]
Assets [Abstract]
Cash and cash equivalents	192,260	352,921
Other long-term investments	1,371	1,137
Total assets	193,631	354,058
Liabilities [Abstract]
Derivative financial instruments	0	0
Total liabilities	0	0
Level 2 [Member]
Assets [Abstract]
Cash and cash equivalents	0	0
Other long-term investments	0	0
Total assets	0	0
Liabilities [Abstract]
Derivative financial instruments	8,401	339
Total liabilities	8,401	339
Level 3 [Member]
Assets [Abstract]
Cash and cash equivalents	0	0
Other long-term investments	0	0
Total assets	0	0
Liabilities [Abstract]
Derivative financial instruments	0	0
Total liabilities	$ 0	$ 0

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INVENTORIES (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
INVENTORIES [Abstract]
Raw materials	$ 58,496	$ 35,150
Work in process	12,569	8,117
Finished goods	76,259	28,659
Total	$ 147,324	$ 71,926

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GOODWILL AND OTHER INTANGIBLE ASSETS, Goodwill (Details) $ in Thousands	6 Months Ended
	Mar. 31, 2019 USD ($)
Goodwill	$ 705,426
Goodwill [Roll Forward]
Balance, beginning of period	101,083
Foreign exchange fluctuations	(167)
Goodwill recorded in connection with acquisition	604,510
Balance, end of period	705,426
Electronic Materials [Member]
Goodwill	358,141
Goodwill [Roll Forward]
Balance, end of period	358,141
Performance Materials [Member]
Goodwill	347,285
Goodwill [Roll Forward]
Balance, end of period	$ 347,285

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GOODWILL AND OTHER INTANGIBLE ASSETS, Intangible Assets (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2018
Finite-Lived Intangible Assets, Net [Abstract]
Total other intangible assets subject to amortization		$ 884,470		$ 884,470		$ 85,163
Accumulated amortization		77,262		77,262		51,131
Indefinite-lived Intangible Assets [Abstract]
Total other intangible assets not subject to amortization		47,170		47,170		1,170
Total other intangible assets,		931,640		931,640		86,333
Other intangible assets [Abstract]
Intangible assets acquired during the period				844,800
Amortization expense		16,960	$ 1,963	26,318	$ 3,936
Estimated future amortization expense [Abstract]
Remainder of 2019		33,881		33,881
2020		87,936		87,936
2021		87,233		87,233
2022		79,822		79,822
2023		67,663		67,663
Other Indefinite-lived Intangibles [Member]
Indefinite-lived Intangible Assets [Abstract]
Total other intangible assets not subject to amortization	[1]	47,170		47,170		1,170
Product Technology, Trade Secrets and Know-How [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Total other intangible assets subject to amortization		134,340		134,340		48,825
Accumulated amortization		31,131		31,131		25,305
Acquired Patents and Licenses [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Total other intangible assets subject to amortization		10,570		10,570		8,270
Accumulated amortization		8,315		8,315		8,252
Customer Relationships, Distribution Rights and Other
Finite-Lived Intangible Assets, Net [Abstract]
Total other intangible assets subject to amortization		739,560		739,560		28,068
Accumulated amortization		$ 37,816		$ 37,816		$ 17,574

[1] Other indefinite-lived intangible assets not subject to amortization consist primarily of trade names.

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OTHER LONG-TERM ASSETS (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Other long-term assets [Abstract]
Long-term contract assets	$ 1,024	$ 1,548
Long-term SERP Investment	1,371	1,137
Prepaid umamortized debt issuance cost	795	0
Other long-term assets	3,025	1,979
Total	6,215	$ 4,664
Long-term liability, SERP investments	$ 1,242

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ACCRUED EXPENSES, INCOME TAXES PAYABLE AND OTHER CURRENT LIABILITIES (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
ACCRUED EXPENSES, INCOME TAXES PAYABLE AND OTHER CURRENT LIABILITIES [Abstract]
Accrued compensation	$ 26,148	$ 35,367
Income taxes payable	18,889	18,045
Dividends payable	12,742	10,822
Taxes, other than income taxes	6,530	1,976
Interest Payable	4,197	0
Contract liabilities	3,611	4,894
Goods and services received, not yet invoiced	4,260	1,954
Environmental accrual	1,008
Other accrued expenses	10,536	9,925
Total	$ 86,913	$ 82,983

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DEBT (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Apr. 30, 2019	Mar. 31, 2019	Mar. 31, 2019	Mar. 31, 2018	Nov. 15, 2018	Sep. 30, 2018
Long-term Debt [Abstract]
Face amount of debt					$ 1,265,000
Percentage of initial principal payment amount					0.25%
Repayments of Long-term Debt			$ 45,000	$ 6,563
Current portion of long-term debt		$ 13,313	$ 13,313			$ 0
Percentage of debt hedged by interest rate swaps		70.00%	70.00%
Long-term Debt, by Maturity [Abstract]
Remainder of 2019		$ 7,988	$ 7,988
2020		10,650	10,650
2021		10,650	10,650
2022		10,650	10,650
2023		10,650	10,650
Greater than 5 years		969,412	969,412
Total		$ 1,020,000	$ 1,020,000
Revolving Credit Facility [Member]
Long-term Debt [Abstract]
Debt instrument term			5 years
Face amount of debt					$ 200,000
Line of credit facility, borrowing capacity					200,000
Maturity date of credit facility			Nov. 15, 2023
Commitment fee percentage			0.25%
Revolving Credit Facility [Member] | LIBOR [Member]
Long-term Debt [Abstract]
Current applicable rate		1.50%	1.50%
Revolving Credit Facility [Member] | ABR borrowings [Member]
Long-term Debt [Abstract]
Current applicable rate		0.50%	0.50%
Term Loan [Member]
Long-term Debt [Abstract]
Debt instrument term			7 years
Face amount of debt					$ 1,065,000
Maturity date of credit facility			Nov. 15, 2025
Contingent payment of principal		In addition, the Company is required to prepay outstanding loans under the Term Loan Facility, subject to certain exceptions, with up to 50% of the Company’s annual excess cash flow, as defined under the Credit Agreement, and 100% of the net cash proceeds of certain recovery events and non-ordinary course asset sales.
Prepayment Premium					1.00%
Repayments of Long-term Debt	$ 55,000	$ 45,000
Fair value of debt		1,020,000	$ 1,020,000
Current portion of long-term debt		13,313	13,313
Debt issuance costs, long-term debt		$ 19,411	$ 19,411
Term Loan [Member] | LIBOR [Member]
Long-term Debt [Abstract]
Current applicable rate		2.25%	2.25%
Term Loan [Member] | ABR borrowings [Member]
Long-term Debt [Abstract]
Current applicable rate		1.25%	1.25%
Letter of Credit [Member]
Long-term Debt [Abstract]
Line of credit facility, borrowing capacity					$ 50,000
Credit Agreement [Member] | Maximum [Member]
Long-term Debt [Abstract]
Secured net leverage ratio			4.00

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DERIVATIVE FINANCIAL INSTRUMENTS, Cash Flow Hedges, Foreign Currency Contracts and Net Investment Contracts (Details) ₩ in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 KRW (₩)
Derivative Instruments [Abstract]
Reclassification period	12 months
Interest Rate Swap [Member]
Derivative Instruments [Abstract]
Derivative notional amount	$ 746,000		$ 746,000
Derivatives expiration date			Jan. 31, 2024
Unrealized loss	(6,473)		$ (6,473)
Reclassified from accumulated other comprehensive income into interest expense	781
Foreign Exchange Contracts [Member] | Buy [Member]
Derivative Instruments [Abstract]
Derivative notional amount	4,102		4,102	$ 7,652
Foreign Exchange Contracts [Member] | Sell [Member]
Derivative Instruments [Abstract]
Derivative notional amount	$ 23,815		$ 23,815	$ 24,860
Net Investment Hedging [Member]
Derivative Instruments [Abstract]
Derivative notional amount | ₩					₩ 100,000,000
Amount recogized in Other comprehensive income		$ 2,966

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DERIVATIVE FINANCIAL INSTRUMENTS, Fair Value of Derivative Instruments in the Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Accrued Expenses, Income Taxes and Other Current Liabilities [Member]
Asset Derivatives [Abstract]
Asset derivatives	$ 0	$ 0
Liability Derivatives [Abstract]
Liability derivatives	781	0
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Other Long-term Liabilities [Member]
Asset Derivatives [Abstract]
Asset derivatives	0	0
Liability Derivatives [Abstract]
Liability derivatives	7,572	0
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member] | Prepaid Expenses and Other Current Assets [Member]
Asset Derivatives [Abstract]
Asset derivatives	0	0
Liability Derivatives [Abstract]
Liability derivatives	0	0
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member] | Accrued Expenses, Income Taxes and Other Current Liabilities [Member]
Asset Derivatives [Abstract]
Asset derivatives	0	0
Liability Derivatives [Abstract]
Liability derivatives	$ 48	$ 339

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DERIVATIVE FINANCIAL INSTRUMENTS, Effect of Derivative Instruments on the Consolidated Statement of Income (Details) - Not Designated as Hedging Instrument [Member] - Foreign Exchange Contracts [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Other Income, Net [Member]
Derivative Instruments, Gain (Loss) [Abstract]
Other income (loss), net			$ (38)	$ 78
Other Income (Expense), Net [Member]
Derivative Instruments, Gain (Loss) [Abstract]
Other income (loss), net	$ (348)	$ 887

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COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands		6 Months Ended
	Nov. 15, 2018	Mar. 31, 2019
COMMITMENTS AND CONTINGENCIES [Abstract]
Environmental Exit Costs, Anticipated Cost	$ 22,000
Environmental Accrual		$ 1,008
Postretirement Obligations in Foreign Jurisdictions [Abstract]
Expected term for benefit payments of all unfunded plans		10 years
Expected future benefit payments		$ 7,906
Purchase obligations [Abstract]
Contractual obligation		$ 11,073

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ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2019	Mar. 31, 2018
Components of Accumulated Comprehensive Income [Roll Forward]
Balance at beginning of period	$ 1,008,167	$ 666,692	$ 601,667	$ 595,037	$ 666,692	$ 595,037
Foreign currency translation adjustment, net of tax	(992)	2,425	3,961	7,144	1,433	11,105
Available-for-sale securities adjustments, net of tax	0		46	(46)	0	0
Change in fair value, net of tax					(6,473)	165
Reclassification adjustment into earnings, net of tax					(1)	(18)
Minimum pension liability adjustment	251	(251)	0		0	0
Balance at end of period	1,025,867	1,008,167	635,511	601,667	1,025,867	635,511
Other Comprehensive Income, Tax [Abstract]
Foreign currency translation adjustment, tax					21	(1,384)
Change in fair value, tax					1,879	57
Reclassification adjustment into earnings, tax						(6)
Accumulated Other Comprehensive Income [Member]
Components of Accumulated Comprehensive Income [Roll Forward]
Balance at beginning of period	6,713	4,539	11,246	3,949	4,539	3,949
Foreign currency translation adjustment, net of tax	(992)	2,425	3,961	7,144
Available-for-sale securities adjustments, net of tax			46	(46)
Minimum pension liability adjustment	251	(251)
Balance at end of period	(502)	6,713	15,201	11,246	(502)	15,201
Foreign Currency Translation [Member]
Components of Accumulated Comprehensive Income [Roll Forward]
Balance at beginning of period		5,918		5,239	5,918	5,239
Foreign currency translation adjustment, net of tax					1,433	11,105
Balance at end of period	7,351		16,344		7,351	16,344
Cash Flow Hedges [Member]
Components of Accumulated Comprehensive Income [Roll Forward]
Balance at beginning of period		(17)		46	(17)	46
Change in fair value, net of tax					(6,473)	165
Reclassification adjustment into earnings, net of tax					(1)	(18)
Balance at end of period	(6,491)		193		(6,491)	193
Pension and Other Postretirement Liabilities [Member]
Components of Accumulated Comprehensive Income [Roll Forward]
Balance at beginning of period		$ (1,362)		$ (1,336)	(1,362)	(1,336)
Balance at end of period	$ (1,362)		$ (1,336)		$ (1,362)	$ (1,336)

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SHARE-BASED COMPENSATION PLANS (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2019 USD ($) Installment	Mar. 31, 2018 USD ($)
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]
Total share-based compensation expense	$ 3,538	$ 4,284	$ 11,708	$ 10,104
Tax benefit	(761)	(1,022)	(2,452)	(2,249)
Total share-based compensation expense, net of tax	2,777	3,262	9,256	7,855
Share-based Compensation			11,708	10,082
Cost of Goods Sold [Member]
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]
Total share-based compensation expense	574	567	1,629	1,354
Research, Development and Technical [Member]
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]
Total share-based compensation expense	442	516	1,343	1,046
Selling, general, and administrative [Member]
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]
Total share-based compensation expense	$ 2,522	$ 3,201	8,736	$ 7,704
Performance Stock Awards [Member]
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]
Share-based Compensation			(778)
Stock Option and Restricted Stock [Member]
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]
Share-based Compensation			$ 3,253
Replacement Award [Member]
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]
Number of equal installments | Installment			3
Period of termination to accelerate vest awards to shares			18 months
Percentage of accelerate vest awards to number of shares			150.00%

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INCOME TAXES (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax [Abstract]
Effective income tax rate	28.50%	19.60%	26.00%	63.80%
Corporate statutory rate	21.00%					24.50%
Forecast [Member]
Income Tax [Abstract]
Corporate statutory rate					21.00%

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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2019	Mar. 31, 2018
Numerator [Abstract]
Net income	$ 27,137	$ 13,443	$ 29,737	$ (3,083)	$ 40,580	$ 26,654
Less: income attributable to participating securities	0		(30)		0	(34)
Earnings available to common shares	$ 27,137		$ 29,707		$ 40,580	$ 26,620
Denominator [Abstract]
Weighted-average common shares (Denominator for basic calculation) (in shares)	28,997,632		25,592,508		28,065,759	25,473,757
Weighted average effect of dilutive securities [Abstract]
Share-based compensation (in shares)	481,482		568,678		541,274	601,925
Diluted weighted average common shares (Denominator for diluted calculation) (in shares)	29,479,114		26,161,186		28,607,033	26,075,682
Earnings per share [Abstract]
Basic (in dollars per share)	$ 0.94		$ 1.16		$ 1.45	$ 1.05
Diluted (in dollars per share)	$ 0.92		$ 1.14		$ 1.42	$ 1.02
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract]
Outstanding stock options excluded from diluted earnings (in shares)	200,000		100,000		200,000	100,000

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SEGMENT REPORTING (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019 USD ($) Segment	Mar. 31, 2018 USD ($)	Mar. 31, 2019 USD ($) Segment	Mar. 31, 2018 USD ($)
SEGMENT REPORTING [Abstract]
Number of operating segments | Segment			1
Number of reportable segments | Segment	2		2
Revenue from External Customers by Products and Services [Abstract]
Revenue	$ 265,391	$ 142,978	$ 487,169	$ 282,957
Segment Reporting Information, Income (Loss) before Income Taxes [Abstract]
Adjusted EBITDA - Electronic Materials	74,910	52,285	149,735	105,181
Adjusted EBITDA - Performance Materials	22,660	1,231	35,727	2,519
Adjusted EBITDA - Unallocated corporate expenses	(12,052)	(9,884)	(23,094)	(20,735)
Interest income	568	1,156	1,587	2,107
Interest expense	(13,331)	(1,158)	(20,221)	(2,290)
Depreciation and amortization	(27,348)	(6,638)	(43,889)	(13,138)
Charge for fair value write-up of acquired inventory sold	(4,566)	0	(14,827)	0
Acquisition and integration related	(2,904)	0	(30,198)	0
Income before income taxes	37,937	36,992	54,820	73,644
Electronic Materials [Member]
Revenue from External Customers by Products and Services [Abstract]
Revenue	212,846	136,103	403,462	269,417
Performance Materials [Member]
Revenue from External Customers by Products and Services [Abstract]
Revenue	$ 52,545	$ 6,875	$ 83,707	$ 13,540