10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2024

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 1-12031

 

UNIVERSAL DISPLAY CORPORATION

(Exact name of registrant as specified in its charter)

Pennsylvania	23-2372688
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
250 Phillips Boulevard, Ewing, New Jersey	08618
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (609) 671-0980

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, $0.01 par value	OLED	The Nasdaq Stock Market LLC

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 ☒ 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 (§ 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 ☒ No ☐

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

Large accelerated filer	☒	Accelerated filer	☐	Emerging growth company	☐
Non-accelerated filer	☐	Smaller reporting 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 account 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 ☒

As of April 29, 2024, the registrant had outstanding 47,439,488 shares of common stock.

TABLE OF CONTENTS

PART I – FINANCIAL INFORMATION
Item 1. Financial Statements (unaudited)
Consolidated Balance Sheets – March 31, 2024 and December 31, 2023	1
Consolidated Statements of Income – Three months ended March 31, 2024 and 2023	2
Consolidated Statements of Comprehensive Income – Three months ended March 31, 2024 and 2023	3
Consolidated Statements of Shareholders’ Equity – Three months ended March 31, 2024 and 2023	4
Consolidated Statements of Cash Flows – Three Months Ended March 31, 2024 and 2023	5
Notes to Consolidated Financial Statements	6
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	26
Item 3. Quantitative and Qualitative Disclosures About Market Risk	31
Item 4. Controls and Procedures	31
PART II – OTHER INFORMATION
Item 1. Legal Proceedings	32
Item 1A. Risk Factors	32
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	32
Item 3. Defaults Upon Senior Securities	32
Item 4. Mine Safety Disclosures	32
Item 5. Other Information	32
Item 6. Exhibits	33

PART I – FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

UNIVERSAL DISPLAY CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(UNAUDITED)

(in thousands, except share and per share data)

	March 31, 2024			December 31, 2023
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	74,012		$	91,985
Short-term investments		465,293			422,137
Accounts receivable		119,584			139,850
Inventory		172,905			175,795
Other current assets		89,478			87,365
Total current assets		921,272			917,132
PROPERTY AND EQUIPMENT, net of accumulated depreciation of $149,062 and $143,908		175,896			175,150
ACQUIRED TECHNOLOGY, net of accumulated amortization of $191,043 and $186,850		86,132			90,325
OTHER INTANGIBLE ASSETS, net of accumulated amortization of $10,769 and $10,414		6,519			6,874
GOODWILL		15,535			15,535
INVESTMENTS		312,939			299,548
DEFERRED INCOME TAXES		63,040			59,108
OTHER ASSETS		102,382			105,289
TOTAL ASSETS	$	1,683,715		$	1,668,961
LIABILITIES AND SHAREHOLDERS’ EQUITY
CURRENT LIABILITIES:
Accounts payable	$	12,841		$	10,933
Accrued expenses		42,099			52,080
Deferred revenue		19,157			47,713
Other current liabilities		20,882			8,096
Total current liabilities		94,979			118,822
DEFERRED REVENUE		13,292			12,006
RETIREMENT PLAN BENEFIT LIABILITY		52,568			52,249
OTHER LIABILITIES		37,976			38,658
Total liabilities		198,815			221,735
COMMITMENTS AND CONTINGENCIES (Note 18)
SHAREHOLDERS’ EQUITY:
Preferred Stock, par value $0.01 per share, 5,000,000 shares authorized, 200,000     shares of Series A Nonconvertible Preferred Stock issued and outstanding    (liquidation value of $7.50 per share or $1,500)		2			2
Common Stock, par value $0.01 per share, 200,000,000 shares authorized, 48,804,964    and 48,731,026 shares issued, and 47,439,316 and 47,365,378 shares outstanding, at    March 31, 2024 and December 31, 2023, respectively		488			487
Additional paid-in capital		702,609			699,554
Retained earnings		826,879			789,553
Accumulated other comprehensive loss		(3,794	)		(1,086	)
Treasury stock, at cost (1,365,648 shares at March 31, 2024 and December 31, 2023)		(41,284	)		(41,284	)
Total shareholders’ equity		1,484,900			1,447,226
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$	1,683,715		$	1,668,961

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

1

UNIVERSAL DISPLAY CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME

(UNAUDITED)

(in thousands, except share and per share data)

	Three Months Ended March 31,
	2024			2023
REVENUE:
Material sales	$	93,284		$	70,190
Royalty and license fees		68,268			55,210
Contract research services		3,707			5,067
Total revenue		165,259			130,467
COST OF SALES		36,969			32,970
Gross margin		128,290			97,497
OPERATING EXPENSES:
Research and development		37,985			31,423
Selling, general and administrative		19,252			15,396
Amortization of acquired technology and other intangible assets		4,548			2,891
Patent costs		1,982			2,255
Royalty and license expense		1,651			164
Total operating expenses		65,418			52,129
OPERATING INCOME		62,872			45,368
Interest income, net		9,568			6,967
Other loss, net		(1,943	)		(703	)
Interest and other loss, net		7,625			6,264
INCOME BEFORE INCOME TAXES		70,497			51,632
INCOME TAX EXPENSE		(13,644	)		(11,793	)
NET INCOME	$	56,853		$	39,839
NET INCOME PER COMMON SHARE:
BASIC	$	1.19		$	0.83
DILUTED	$	1.19		$	0.83
WEIGHTED AVERAGE SHARES USED IN COMPUTING NET    INCOME PER COMMON SHARE:
BASIC		47,557,959			47,523,593
DILUTED		47,628,492			47,567,007
CASH DIVIDENDS DECLARED PER COMMON SHARE	$	0.40		$	0.35

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

2

UNIVERSAL DISPLAY CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(UNAUDITED)

(in thousands)

	Three Months Ended March 31,
	2024			2023
NET INCOME	$	56,853		$	39,839
OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX:
Unrealized (loss) gain on available-for-sale securities,    net of tax of none and ($733), respectively		(2,666	)		2,627
Amortization of prior service cost and actuarial loss for    retirement plan included in net periodic pension costs,    net of tax of ($3) and ($71), respectively		8			253
Change in cumulative foreign currency translation    adjustment		(50	)		95
TOTAL OTHER COMPREHENSIVE (LOSS) INCOME		(2,708	)		2,975
COMPREHENSIVE INCOME	$	54,145		$	42,814

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

3

UNIVERSAL DISPLAY CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

(UNAUDITED)

(in thousands, except for share data)

	Three Months Ended March 31, 2024
	Series A Nonconvertible									Additional						Accumulated Other								Total
	Preferred Stock				Common Stock					Paid-in			Retained			Comprehensive			Treasury Stock					Shareholders’
	Shares		Amount		Shares			Amount		Capital			Earnings			Loss			Shares		Amount			Equity
BALANCE, DECEMBER 31, 2023		200,000	$	2		48,731,026		$	487	$	699,554		$	789,553		$	(1,086	)		1,365,648	$	(41,284	)	$	1,447,226
Net income		—		—		—			—		—			56,853			—			—		—			56,853
Other comprehensive loss		—		—		—			—		—			—			(2,708	)		—		—			(2,708	)
Cash dividend		—		—		—			—		—			(19,527	)		—			—		—			(19,527	)
Issuance of common stock to employees		—		—		103,752			1		8,552			—			—			—		—			8,553
Shares withheld for employee taxes		—		—		(39,829	)		—		(7,058	)		—			—			—		—			(7,058	)
Issuance of common stock to Board of Directors and Scientific Advisory Board		—		—		5,552			—		758			—			—			—		—			758
Issuance of common stock to employees under an ESPP		—		—		4,463					803			—			—			—		—			803
BALANCE, MARCH 31, 2024		200,000	$	2		48,804,964		$	488	$	702,609		$	826,879		$	(3,794	)		1,365,648	$	(41,284	)	$	1,484,900

	Three Months Ended March 31, 2023
	Series A Nonconvertible										Additional						Accumulated Other								Total
	Preferred Stock				Common Stock						Paid-in			Retained			Comprehensive			Treasury Stock					Shareholders’
	Shares		Amount		Shares			Amount			Capital			Earnings			Loss			Shares		Amount			Equity
BALANCE, DECEMBER 31, 2022		200,000	$	2		49,136,030		$	491		$	681,335		$	653,277		$	(18,452	)		1,365,648	$	(41,284	)	$	1,275,369
Net income		—		—		—			—			—			39,839			—			—		—			39,839
Other comprehensive income		—		—		—			—			—			—			2,975			—		—			2,975
Cash dividend		—		—		—			—			—			(16,769	)		—			—		—			(16,769	)
Issuance of common stock to employees		—		—		126,846			1			3,853			—			—			—		—			3,854
Shares withheld for employee taxes		—		—		(51,703	)		—			(7,181	)		—			—			—		—			(7,181	)
Cancellation of restricted stock awards		—		—		(526,241	)		(5	)		5			—			—			—		—			—
Issuance of common stock to Board of Directors and Scientific Advisory Board		—		—		6,896			—			723			—			—			—		—			723
Issuance of common stock to employees under an ESPP		—		—		5,639			—			655			—			—			—		—			655
BALANCE, MARCH 31, 2023		200,000	$	2		48,697,467		$	487		$	679,390		$	676,347		$	(15,477	)		1,365,648	$	(41,284	)	$	1,299,465

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

4

UNIVERSAL DISPLAY CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(UNAUDITED)

(in thousands)

	Three Months Ended March 31,
	2024			2023
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	56,853		$	39,839
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation		6,616			6,496
Amortization of intangibles		4,548			2,891
Amortization of premium and discount on investments, net		(2,236	)		(3,597	)
Stock-based compensation		9,174			4,415
Deferred income tax benefit		(3,936	)		(5,936	)
Retirement plan expense, net of benefit payments		330			782
Decrease (increase) in assets:
Accounts receivable		20,266			(13	)
Inventory		2,890			8,975
Other current assets		(2,113	)		8,598
Other assets		2,907			5,515
Increase (decrease) in liabilities:
Accounts payable and accrued expenses		(7,977	)		(24,116	)
Other current liabilities		12,786			12,874
Deferred revenue		(27,270	)		(8,616	)
Other liabilities		(682	)		(486	)
Net cash provided by operating activities		72,156			47,621
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment		(7,206	)		(9,098	)
Purchases of intangibles		—			(51	)
Purchases of investments		(99,947	)		(65,207	)
Proceeds from sale and maturity of investments		42,970			115,031
Net cash (used in) provided by investing activities		(64,183	)		40,675
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock		639			518
Payment of withholding taxes related to stock-based compensation to employees		(7,058	)		(7,181	)
Cash dividends paid		(19,527	)		(16,769	)
Net cash used in financing activities		(25,946	)		(23,432	)
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS		(17,973	)		64,864
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD		91,985			93,430
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	74,012		$	158,294
SUPPLEMENTAL DISCLOSURES:
Unrealized (loss) gain on available-for-sale securities	$	(2,666	)	$	3,202
Common stock issued to Board of Directors and Scientific Advisory Board that was    earned and accrued for in a previous period		300			300
Net change in accounts payable and accrued expenses related to purchases of property    and equipment		(156	)		766
Cash paid for income taxes, net of refunds		5,085			4,961

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

5

UNIVERSAL DISPLAY CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

1. BUSINESS:

Universal Display Corporation and its subsidiaries (the Company) is a leader in the research, development and commercialization of organic light emitting diode (OLED) technologies and materials for use in display and solid-state lighting applications. OLEDs are thin, lightweight and power-efficient solid-state devices that emit light and can be manufactured on both flexible and rigid substrates, making them highly suitable for use in full-color displays and as lighting products. OLED displays are capturing a growing share of the display market, especially in the mobile phone, television, monitor, wearable, tablet, notebook and personal computer, augmented reality (AR), virtual reality (VR) and automotive markets. The Company believes this is because OLEDs offer potential advantages over competing display technologies with respect to power efficiency, contrast ratio, viewing angle, video response time, form factor and manufacturing cost. The Company also believes that OLED lighting products have the potential to replace many existing light sources in the future because of their high-power efficiency, excellent color rendering index, low operating temperature and novel form factor. The Company’s technology leadership, intellectual property position, and more than 20 years of experience working closely with leading OLED display manufacturers are some of the competitive advantages that should enable the Company to continue to share in the revenues from OLED displays and lighting products as they gain wider acceptance.

The Company’s primary business strategy is to (1) develop new OLED materials and sell existing and new materials to product manufacturers of products for display applications, such as mobile phones, televisions, monitors, wearables, tablets, portable media devices, notebook computers, personal computers and automotive applications, and specialty and general lighting products; and (2) further develop and either license or otherwise commercialize the Company’s proprietary OLED material, device design and manufacturing technologies to those manufacturers. The Company has established a significant portfolio of proprietary OLED technologies and materials, primarily through internal research and development efforts and acquisitions of patents and patent applications, as well as maintaining long-standing, and establishing new relationships with world-class universities, research institutions and strategic manufacturing partnerships. The Company currently owns, exclusively licenses or has the sole right to sublicense more than 6,000 patents issued and pending worldwide.

The Company manufactures and sells its proprietary OLED materials to customers for evaluation and use in commercial OLED products. The Company also enters into agreements with manufacturers of OLED display and lighting products under which it grants them licenses to practice under the Company’s patents and to use the Company's proprietary know-how. At the same time, the Company works with these and other companies that are evaluating the Company's OLED material, device design and manufacturing technologies for possible use in commercial OLED display and lighting products.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:

Interim Financial Information

In the opinion of management, the accompanying unaudited Consolidated Financial Statements have been prepared in accordance with the requirements of the Securities and Exchange Commission for interim financial reporting and contain all adjustments (consisting of only normal recurring adjustments) necessary to present fairly the Company’s financial position as of March 31, 2024 and results of operations for the three months ended March 31, 2024 and 2023, and cash flows for the three months ended March 31, 2024 and 2023. While management believes that the disclosures presented are adequate to make the information not misleading, these unaudited Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the notes thereto in the Company’s latest year-end Consolidated Financial Statements, which are included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023. The results of the Company’s operations for any interim period are not necessarily indicative of the results of operations for any other interim period or for the full year.

Principles of Consolidation

The Consolidated Financial Statements include the accounts of Universal Display Corporation and its wholly owned subsidiaries, UDC, Inc., UDC Ireland Limited (UDC Ireland), Universal Display Corporation Hong Kong, Limited, Universal Display Corporation Korea, Y.H. (UDC Korea), Universal Display Corporation Japan GK, Universal Display Corporation China, Ltd., Adesis, Inc. (Adesis), UDC Ventures LLC, OVJP Corporation (OVJP Corp) and OLED Material Manufacturing Limited (OMM). All intercompany transactions and accounts have been eliminated.

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Reclassification of Prior Year Presentation

Certain prior year adjustments to reconcile net income to net cash provided by operating activities have been reclassified on the Consolidated Statements of Cash Flows to conform to the current year presentation. Stock-based compensation activity has been consolidated and includes stock-based compensation to employees, Board of Directors, and Scientific Advisory Board.

Management’s Use of Estimates

The preparation of financial statements in conformity with U.S. generally accepted accounting principles (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The estimates made are principally in the areas of revenue recognition including estimates of material unit sales and royalties, the useful life of acquired intangibles, lease liabilities, right-of-use assets, the use and recoverability of inventories, intangibles, investments and income taxes including realization of deferred tax assets, stock-based compensation and retirement benefit plan liabilities. Actual results could differ from those estimates.

Inventories

Inventories consist of raw materials, work-in-process and finished goods, and are stated at the lower of cost, determined on a first-in, first-out basis, or net realizable value. Inventory valuation and firm committed purchase order assessments are performed on a quarterly basis and those items that are identified to be obsolete or in excess of forecasted usage are written down to their estimated realizable value. Estimates of realizable value are based upon management’s analyses and assumptions, including, but not limited to, forecasted sales levels by product, expected product lifecycle, product development plans and future demand requirements. A 12-month rolling forecast based on factors, including, but not limited to, production cycles, anticipated product orders, marketing forecasts, backlog, and shipment activities is used in the inventory analysis. If market conditions are less favorable than forecasts or actual demand from customers is lower than estimates, additional inventory write-downs may be required. If demand is higher than expected, inventories that had previously been written down may be sold.

Fair Value of Financial Instruments

The carrying values of accounts receivable, other current assets, accounts payable and other current liabilities approximate fair value in the accompanying Consolidated Financial Statements due to the short-term nature of those instruments. The Company’s other financial instruments, which include cash equivalents and investments (excluding minority equity investments) are carried at fair value.

Minority Equity Investments

The Company accounts for minority equity investments in companies that are not accounted for under the equity method as equity securities without readily determinable fair values. The value of these securities is based on original cost less impairments, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or similar investment in the same issuer. Under this method, the share of income or loss of such companies is not included in the Consolidated Statements of Income. The carrying value of these investments is included in investments on the Consolidated Balance Sheets.

The Company’s policy is to recognize an impairment in the value of its minority equity investments when evidence of an impairment exists. Factors considered in the assessment include a significant adverse change in the regulatory, economic, or technological environment, the completion of new equity financing that may indicate a decrease in value, the failure to complete new equity financing arrangements after seeking to raise additional funds, or the commencement of proceedings under which the assets of the business may be placed in receivership or liquidated to satisfy the claims of debt and equity stakeholders. The impairment in the value of minority equity investments is included in the other loss, net line item on the Consolidated Statements of Income.

Leases

The Company is a lessee in operating leases primarily incurred to facilitate manufacturing, research and development, and selling, general and administrative activities. At contract inception, the Company determines if an arrangement is or contains a lease, and if so recognizes a right-of-use asset and lease liability at the lease commencement date. For operating leases, the lease liability is measured at the present value of the unpaid lease payments at the lease commencement date, whereas for finance leases, the lease liability is initially measured at the present value of the unpaid lease payments and subsequently measured at amortized cost using the interest method. Operating lease right-of-use assets are included in other assets on the Consolidated Balance Sheets. The short-term portion of operating lease liabilities is included in other current liabilities on the Consolidated Balance Sheets and the long-term portion is included

7

in other liabilities on the Consolidated Balance Sheets. As of March 31, 2024, the Company had no leases that qualified as financing arrangements.

Key estimates and judgments include how the Company determines the discount rate used to discount the unpaid lease payments to present value and the lease term. The Company monitors for events or changes in circumstances that could potentially require recognizing an impairment loss.

Revenue Recognition and Deferred Revenue

Material sales relate to the Company’s sale of its OLED materials for incorporation into its customers’ commercial OLED products or for their OLED development and evaluation activities. Revenue associated with material sales is generally recognized at the time title passes, which is typically at the time of shipment or at the time of delivery, depending upon the contractual agreement between the parties. Revenue may be recognized after control of the material passes in the event the transaction price includes variable consideration. For example, a customer may be provided an extended opportunity to stock materials prior to use in mass production and given a general right of return not conditioned on breaches of warranties associated with the specific product. In such circumstances, revenue will be recognized at the earlier of the expiration of the customer’s general right of return or once it becomes unlikely that the customer will exercise its right of return.

The vast majority of revenue attributed to material sales is determined through technology license agreements and material supply agreements the terms of which are jointly agreed upon with the Company’s customers. The remaining revenue recognized is in the form of contract research services revenue earned by the Company’s subsidiary, Adesis, Inc., and the Company’s occasional material sales to smaller customers. None of the revenue recognized during the three months ended March 31, 2024 or 2023 resulted solely from royalty or license fee arrangements as to which there were not associated material sales.

The rights and benefits to the Company’s OLED technologies are conveyed to the customer through technology license agreements and material supply agreements. The Company believes that the licenses and materials sold under these combined agreements are not distinct from each other for financial reporting purposes and as such, they are accounted for as a single performance obligation. Accordingly, total contract consideration is estimated and recognized over the contract term based on material units sold at the estimated per unit fee over the life of the contract. Total contract consideration is allocated to material sales and royalty and licensing fees on the Consolidated Statements of Income based on contract pricing.

Various estimates are relied upon to recognize revenue. The Company estimates total material units to be purchased by its customers over the contract term based on historical trends, industry estimates and its forecast process. Management uses the expected value method to estimate the material per unit fee. Additionally, management estimates the sales-based portion of royalty revenue based on the estimated net sales revenue of its customers over the contract term.

Contract research services revenue is revenue earned by Adesis by providing chemical materials synthesis research, development and commercialization for non-OLED applications on a contractual basis. These services range from intermediates for structure-activity relationship studies, reference agents and building blocks for combinatorial synthesis, re-synthesis of key intermediates, specialty organic chemistry needs, and selective toll manufacturing. These services are provided to third-party pharmaceutical and life sciences firms and other technology firms at fixed costs or predetermined rates on a contract basis. Revenue is recognized as services are performed with billing schedules and payment terms negotiated on a contract-by-contract basis. Payments received in excess of revenue recognized are recorded as deferred revenue. In other cases, services may be provided and revenue is recognized before the customer is invoiced. In these cases, revenue recognized will exceed amounts billed and the difference, representing amounts which are currently unbillable to the customer pursuant to contractual terms, is recorded as an unbilled receivable.

Technology development and support revenue is revenue earned from development and technology evaluation agreements and commercialization assistance fees. Technology development and support revenue is included in contract research services on the Consolidated Statements of Income.

On December 2, 2022, the Company entered into a commercial patent license agreement with Samsung Display Co., Ltd. (SDC), replacing a previous license agreement that had been in place since 2018. This agreement, which covers the manufacture and sale of specified OLED display materials, was effective as of January 1, 2023 and lasts through the end of 2027 with an additional two-year extension option for SDC. Under this agreement, the Company is being paid a license fee, which includes quarterly and annual payments over the agreement term of five years. The agreement conveys to SDC the non-exclusive right to use certain of the Company's intellectual property assets for a limited period of time that is less than the estimated life of the assets.

At the same time the Company entered into the current commercial license agreement with SDC, the Company also entered into a new supplemental material purchase agreement with SDC, which lasts for the same term as the license agreement and is subject to the

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same extension option. This new material purchase agreement replaced a previous purchase agreement that had been in place since 2018. Under the supplemental material purchase agreement, SDC agrees to purchase red and green phosphorescent emitter materials from the Company for use in the manufacture of licensed products. This amount purchased is subject to SDC’s requirements for phosphorescent emitter materials and the Company’s ability to meet these requirements over the term of the supplemental agreement.

In 2015, the Company entered into an OLED patent license agreement and an OLED commercial supply agreement with LG Display Co., Ltd. (LG Display), which were effective as of January 1, 2015. The terms of these agreements were extended by a January 1, 2021 amendment through the end of 2025. The patent license agreement provides LG Display a non-exclusive, royalty bearing portfolio license to make and sell OLED displays under the Company's patent portfolio. The patent license calls for license fees, prepaid royalties and running royalties on licensed products. The OLED commercial supply agreement provides for the sale of materials for use by LG Display, which may include phosphorescent emitters and host materials. The agreements provide for certain other minimum obligations relating to the volume of material sales anticipated over the lives of the agreements as well as minimum royalty revenue.

In 2023, the Company entered into new long-term, multi-year agreements with BOE Technology Group Co., Ltd. (BOE). Under these agreements, the Company has granted BOE non-exclusive license rights under various patents owned or controlled by the Company to manufacture and sell OLED display products. The Company supplies phosphorescent OLED materials to BOE for use in its licensed products.

In 2019, the Company entered into an evaluation and commercial supply relationship with Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. (CSOT). In 2020, the Company entered into long-term, multi-year agreements with CSOT. Under these agreements, the Company has granted CSOT non-exclusive license rights under various patents owned or controlled by the Company to manufacture and sell OLED display products. The Company also supplies phosphorescent OLED materials to CSOT for use in its licensed products.

In 2018, the Company entered into long-term, multi-year OLED patent license and material purchase agreements with Visionox Technology, Inc. (Visionox). Under the license agreement, the Company granted certain of Visionox’s affiliates non-exclusive license rights under various patents owned or controlled by the Company to manufacture and sell OLED display products. The license agreement calls for license fees and running royalties on licensed products. Additionally, the Company supplies phosphorescent OLED materials to Visionox for use in its licensed products. In 2021, the Company announced that it had extended the Visionox agreement by entering into new five-year OLED material supply and license agreements with a new affiliate of Visionox, Visionox Hefei Technology Co. Ltd.

In 2016, the Company entered into long-term, multi-year OLED patent license and material purchase agreements with Tianma Micro-electronics Co., Ltd. (Tianma). Under the license agreement, the Company has granted Tianma non-exclusive license rights under various patents owned or controlled by the Company to manufacture and sell OLED display products. The license agreement calls for license fees and running royalties on licensed products. Additionally, the Company supplies phosphorescent OLED materials to Tianma for use in its licensed products. In 2021, the parties extended the terms of both the patent license and material purchase agreements for an additional multi-year-term.

All material sales transactions that are not variable consideration transactions are billed and due within 90 days and substantially all are transacted in U.S. dollars.

Cost of Sales

Cost of sales consists of labor and material costs associated with the production of materials processed at the facilities of the Company's manufacturing partner, PPG Industries, Inc. (PPG) and at the Company's internal facilities. The Company’s portion of cost of sales also includes depreciation of manufacturing equipment, as well as manufacturing overhead costs and inventory adjustments for excess and obsolete inventory.

Research and Development

Expenditures for research and development are charged to expense as incurred.

Patent Costs

Costs associated with patent applications, patent prosecution, patent defense and the maintenance of patents are charged to expense as incurred. Costs to successfully defend a challenge to a patent are capitalized to the extent of an evident increase in the value of the patent. Costs that relate to an unsuccessful outcome are charged to expense.

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Amortization of Acquired Technology

Amortization costs primarily relate to technology acquired from Merck KGaA, Darmstadt, Germany (Merck KGaA) and BASF SE (BASF). The Merck KGaA acquisition was completed on April 28, 2023 and the BASF acquisition was completed during the year ended December 31, 2016. Acquisition costs are being amortized over a period of 10 years for the Merck KGaA and BASF patents.

Amortization of Other Intangible Assets

Other intangible assets from the Adesis acquisition are being amortized over a period of 10 to 15 years. See Note 7 for further discussion.

Translation of Foreign Currency Financial Statements and Foreign Currency Transactions

The Company’s reporting currency is the U.S. dollar. The functional currency for the UDC Ireland and UDC Korea subsidiaries are also the U.S. dollar and the functional currency for the OMM subsidiary and each of the Company's other Asia-Pacific foreign subsidiaries is its respective local currency. The Company translates the amounts included in the Consolidated Statements of Income from OMM and its Asia-Pacific foreign subsidiaries into U.S. dollars at weighted-average exchange rates, which the Company believes are representative of the actual exchange rates on the dates of the transactions. The Company's OMM subsidiary and each of the Company's other Asia-Pacific foreign subsidiaries' assets and liabilities are translated into U.S. dollars from the local currency at the actual exchange rates as of the end of each reporting date, and the Company records the resulting foreign exchange translation adjustments in the Consolidated Balance Sheets as a component of accumulated other comprehensive loss. The overall effect of the translation of foreign currency and foreign currency transactions to date has been insignificant.

Income Taxes

Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The Company recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount of which the likelihood of realization is greater than 50%. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The Company records interest and penalties, if any, related to unrecognized tax benefits as a component of tax expense.

Share-Based Payment Awards

The Company recognizes in the Consolidated Statements of Income the grant-date fair value of equity-based awards such as shares issued under employee stock purchase plans, restricted stock awards, restricted stock units and performance unit awards issued to employees and directors.

The grant-date fair value of stock awards is based on the closing price of the stock on the date of grant. The fair value of share-based awards is recognized as compensation expense on a straight-line basis over the requisite service period, net of forfeitures. The Company issues new shares upon the respective grant, exercise or vesting of the share-based payment awards, as applicable.

Performance unit awards are subject to either a performance-based or market-based vesting requirement. For performance-based vesting, the grant-date fair value of the award, based on fair value of the Company's common stock, is recognized over the service period based on an assessment of the likelihood that the applicable performance goals will be achieved, and compensation expense is periodically adjusted based on actual and expected performance. Compensation expense for performance unit awards with market-based vesting is calculated based on the estimated fair value as of the grant date utilizing a Monte Carlo simulation model and is recognized over the service period on a straight-line basis.

Recent Accounting Pronouncements

Adoption of New Accounting Standards

In June 2022, the FASB issued ASU No. 2022-03, Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions. Under this standard, a contractual restriction on the sale of an equity security is not considered in measuring the security's fair value. The standard also requires certain disclosures for equity securities that are subject to

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contractual restrictions. The adoption of ASU 2022-03, beginning on January 1, 2024, did not have an impact on the Consolidated Financial Statements and related disclosures.

Accounting Standards Issued But Not Yet Adopted

In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The standard improves the reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. ASU 2023-07 becomes effective during the annual period ending December 31, 2024. The Company is evaluating the potential impact of this standard on its Consolidated Financial Statements and related disclosures.

In December 2023, the FASB issued ASU No. 2023-09, Improvements to Income Tax Disclosures (Topic 740). The standard enhances to the annual income tax disclosures to address investor requests for more information about the tax risks and opportunities present in an entity's worldwide operations. ASU 2023-09 becomes effective January 1, 2025, and the Company is evaluating the potential impact of this standard on its income tax disclosures.

In March 2024, the FASB issued ASU No. 2024-01, Compensation - Stock Compensation (Topic 718). The standard provides guidance to reduce complexity and diversity in practice in determining whether a profits interest award is accounted for as a share-based payment. Early adoption is permitted. This guidance can be applied either retrospectively to all prior periods presented in the financial statements or prospectively to profits interest or similar awards granted or modified on or after the effective date for our application of this guidance. ASU 2024-01 becomes effective January 1, 2025, and the Company is evaluating the potential impact of this standard on its Consolidated Financial Statements and related disclosures.

3. CASH, CASH EQUIVALENTS AND INVESTMENTS:

The Company’s portfolio of marketable fixed income securities consists of U.S. Government bonds and corporate bonds. The Company considers all highly liquid debt instruments purchased with an original maturity (maturity at the purchase date) of three months or less to be cash equivalents. The Company classifies its remaining debt security investments as available-for-sale. These debt securities are carried at fair market value, with unrealized gains and losses reported in shareholders’ equity. Gains or losses on securities sold are based on the specific identification method.

Cash and Cash Equivalents

The following table provides details regarding the Company’s portfolio of cash and cash equivalents (in thousands):

	Amortized		Unrealized				Aggregate Fair
Cash and Cash Equivalents Classification	Cost		Gains		(Losses)		Market Value
March 31, 2024
Cash accounts in banking institutions	$	70,765	$	—	$	—	$	70,765
Money market accounts		3,247		—		—		3,247
	$	74,012	$	—	$	—	$	74,012
December 31, 2023
Cash accounts in banking institutions	$	91,717	$	—	$	—	$	91,717
Money market accounts		268		—		—		268
	$	91,985	$	—	$	—	$	91,985

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Short-term Investments

The following table provides details regarding the Company’s portfolio of short-term investments (in thousands):

	Amortized		Unrealized					Aggregate Fair
Short-term Investments Classification	Cost		Gains		(Losses)			Market Value
March 31, 2024
Corporate bonds	$	796	$	1	$	(1	)	$	796
U.S. Government bonds		465,377		10		(979	)		464,408
Marketable securities		89		—		—			89
	$	466,262	$	11	$	(980	)	$	465,293
December 31, 2023
Corporate bonds	$	1,763	$	1	$	(5	)	$	1,759
U.S. Government bonds		420,769		303		(694	)		420,378
	$	422,532	$	304	$	(699	)	$	422,137

Long-term U.S. Government Bond Investments

The following table provides details regarding the Company’s portfolio of long-term investments (in thousands):

	Amortized		Unrealized					Aggregate Fair
Long-term Investments Classification	Cost		Gains		(Losses)			Market Value
March 31, 2024
U.S. Government bonds	$	299,537	$	68	$	(712	)	$	298,893
	$	299,537	$	68	$	(712	)	$	298,893
December 31, 2023
U.S. Government bonds	$	284,053	$	1,457	$	(8	)	$	285,502
	$	284,053	$	1,457	$	(8	)	$	285,502

Minority Equity Investments

The Company’s portfolio of minority equity investments consists of investments in privately held early-stage companies primarily motivated for the Company to gain early access to new technology and are passive in nature in that the Company typically does not seek to obtain representation on the boards of directors of the companies in which it invests. Minority equity investments are included in investments on the Consolidated Balance Sheets. As of March 31, 2024 and December 31, 2023, the Company had minority equity investments in five entities with a total carrying value of $14.0 million accounted for as equity securities without readily determinable fair values.

4. FAIR VALUE MEASUREMENTS:

The following table provides the assets and liabilities carried at fair value measured on a recurring basis as of March 31, 2024 (in thousands):

			Fair Value Measurements, Using
	Total Carrying Value as of March 31, 2024		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Short-term U.S. Government bonds	$	464,408	$	464,408	$	—	$	—
Long-term U.S. Government bonds		298,893		298,893		—		—
Cash equivalents		3,247		3,247		—		—
Short-term Corporate bonds		796		796		—		—
Short-term Marketable securities		89		89		—		—

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The following table provides the assets and liabilities carried at fair value measured on a recurring basis as of December 31, 2023 (in thousands):

			Fair Value Measurements, Using
	Total Carrying Value as of December 31, 2023		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Short-term U.S. Government bonds	$	420,378	$	420,378	$	—	$	—
Long-term U.S. Government bonds		285,502		285,502		—		—
Short-term Corporate bonds		1,759		1,759		—		—
Cash equivalents		268		268		—		—

Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level 3 inputs are unobservable inputs based on management’s own assumptions used to measure assets and liabilities at fair value. A financial asset’s or liability’s classification is determined based on the lowest level input that is significant to the fair value measurement.

Changes in fair value of the debt investments are recorded as unrealized gains and losses in accumulated other comprehensive loss on the Consolidated Balance Sheets and any credit losses on debt investments are recorded as an allowance for credit losses with an offset recognized in other loss, net on the Consolidated Statements of Income. There were no credit losses on debt investments as of March 31, 2024 or December 31, 2023.

5. INVENTORY:

Inventory consisted of the following (in thousands):

	March 31, 2024		December 31, 2023
Raw materials	$	108,681	$	113,400
Work-in-process		13,605		9,433
Finished goods		50,619		52,962
Inventory	$	172,905	$	175,795

The Company recorded an increase in its inventory reserves of none and $3.3 million for the three months ended March 31, 2024 and 2023, respectively, due to excess inventory levels in certain products.

6. PROPERTY AND EQUIPMENT:

Property and equipment, net consist of the following (in thousands):

	March 31, 2024			December 31, 2023
Land	$	12,230		$	12,230
Building and improvements		117,505			116,903
Office and lab equipment		150,079			148,465
Furniture, fixtures and computer related assets		18,759			18,970
Construction-in-progress		26,385			22,490
		324,958			319,058
Less: Accumulated depreciation		(149,062	)		(143,908	)
Property and equipment, net	$	175,896		$	175,150

Depreciation expense was $6.6 million and $6.5 million for the three months ended March 31, 2024 and 2023, respectively.

7. GOODWILL AND INTANGIBLE ASSETS:

The Company monitors the recoverability of goodwill annually or whenever events or changes in circumstances indicate the carrying value may not be recoverable. Purchased intangible assets subject to amortization consist of acquired technology and other intangible assets that include trade names, customer relationships and developed intellectual property (IP) processes.

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Acquired Technology

Acquired technology primarily consists of acquired license rights for patents and know-how obtained from Merck KGaA, BASF and Fujifilm. These intangible assets consist of the following (in thousands):

	March 31, 2024			December 31, 2023
Merck KGaA	$	66,012		$	66,012
BASF		95,989			95,989
Fujifilm		109,462			109,462
Other		5,712			5,712
		277,175			277,175
Less: Accumulated amortization		(191,043	)		(186,850	)
Acquired technology, net	$	86,132		$	90,325

Amortization expense related to acquired technology was $4.2 million and $2.5 million for the three months ended March 31, 2024 and 2023, respectively. Amortization expense is included in the amortization of acquired technology and other intangible assets expense line item on the Consolidated Statements of Income and is expected to be $12.6 million for the nine months ending December 31, 2024, $16.8 million for the year ending December 31, 2025, $12.0 million in the year ending December 31, 2026, $7.2 million in each of the years ending December 31, 2027 and 2028, and $30.3 million thereafter.

Merck KGaA Patent Acquisition

In April 2023, UDC Ireland entered into a Patent Sale and License Agreement with Merck KGaA. Under this agreement, Merck KGaA sold to UDC Ireland all of its rights, title and interest to over 550 of its owned and licensed OLED-related patents and patent applications in exchange for a cash payment of $66.0 million. The Patent Sale and License Agreement contains customary representations, warranties and covenants of the parties. UDC Ireland recorded the payment of $66.0 million as acquired technology, which is being amortized over a period of 10 years.

BASF Patent Acquisition

On June 28, 2016, UDC Ireland entered into and consummated an IP Transfer Agreement with BASF. Under the IP Transfer Agreement, BASF sold to UDC Ireland all of its rights, title and interest to certain of its owned and co-owned intellectual property rights relating to the composition, development, manufacture and use of OLED materials, including OLED lighting and display stack technology, as well as certain tangible assets. The intellectual property includes knowhow and more than 500 issued and pending patents in the area of phosphorescent materials and technologies. These assets were acquired in exchange for a cash payment of €86.8 million ($95.8 million). In addition, UDC Ireland also took on certain rights and obligations under three joint research and development agreements to which BASF was a party. The IP Transfer Agreement also contains customary representations, warranties and covenants of the parties. UDC Ireland recorded the payment of €86.8 million ($95.8 million) and acquisition costs incurred of $217,000 as acquired technology, which is being amortized over a period of 10 years.

Fujifilm Patent Acquisition

On July 23, 2012, the Company entered into a Patent Sale Agreement with Fujifilm. Under the agreement, Fujifilm sold more than 1,200 OLED-related patents and patent applications in exchange for a cash payment of $105.0 million, plus $4.5 million in costs incurred in connection with the purchase. The agreement contains customary representations and warranties and covenants, including respective covenants not to sue by both parties thereto. The agreement permitted the Company to assign all of its rights and obligations under the agreement to its affiliates, and the Company assigned, prior to the consummation of the transactions contemplated by the agreement, its rights and obligations to UDC Ireland. The transactions contemplated by the agreement were consummated on July 26, 2012. The Company recorded the $105.0 million plus $4.5 million of purchase costs as acquired technology, which was amortized over a period of 10 years that ended in July 2022.

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Other Intangible Assets

As a result of the Adesis acquisition in June 2016, the Company recorded $16.8 million of other intangible assets, including $10.5 million assigned to customer relationships with a weighted average life of 11.5 years, $4.8 million to internally developed IP, processes and recipes with a weighted average life of 15 years, and $1.5 million to trade name and trademarks with a weighted average life of 10 years.

At March 31, 2024, these other intangible assets consist of the following (in thousands):

	March 31, 2024
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer relationships	$	10,520	$	(7,029	)	$	3,491
Developed IP, processes and recipes		4,820		(2,468	)		2,352
Trade name/Trademarks		1,500		(1,155	)		345
Other		448		(117	)		331
Total identifiable other intangible assets	$	17,288	$	(10,769	)	$	6,519

Amortization expense related to other intangible assets was $356,000 and $352,000 for the three months ended March 31, 2024 and 2023, respectively. Amortization expense is included in the amortization of acquired technology and other intangible assets expense line item on the Consolidated Statements of Income and is expected to be $1.0 million for the nine months ending December 31, 2024, $1.4 million in each of the years ending December 31, 2025 and 2026, $1.3 million for the year ending December 31, 2027, $422,000 for the year ending December 31, 2028, and $1.0 million in total thereafter.

8. OTHER ASSETS:

Other assets consist of the following (in thousands):

	March 31, 2024		December 31, 2023
Long-term taxes receivable	$	57,808	$	60,146
Right-of-use assets		23,998		24,910
Long-term unbilled receivables		10,278		9,074
Long-term contract assets		8,688		9,278
Other long-term assets		1,610		1,881
Other assets	$	102,382	$	105,289

See Notes 9 and 20 for further explanation on right-of-use assets and non-current taxes receivable, respectively.

9. LEASES:

The Company has entered into operating leases to facilitate the expansion of its manufacturing, research and development, and selling, general and administrative activities. For purposes of calculating operating lease liabilities, lease terms may be deemed to include options to extend or terminate the lease when those events are reasonably certain to occur. The interest rate implicit in lease contracts is typically not readily determinable and as such the Company uses the appropriate incremental borrowing rate based on information available at the lease commencement date in determining the present value of the lease payments. Current lease agreements do not contain any residual value guarantees or material restrictive covenants. As of March 31, 2024, the Company did not have any finance leases and no additional operating leases that have not yet commenced.

The following table presents the Company’s operating lease cost and supplemental cash flow information related to the Company’s operating leases (in thousands):

	Three Months Ended March 31,
	2024		2023
Operating lease cost	$	1,103	$	1,221
Non-cash activity:
Right-of-use assets obtained in exchange for lease obligations	$	—	$	—

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The following table presents the Company’s operating lease right-of-use assets and liabilities (in thousands):

	March 31, 2024		December 31, 2023
Right-of-use assets	$	23,998	$	24,910
Short-term lease liabilities		3,582		3,533
Long-term lease liabilities		21,945		22,855

The following table presents weighted average assumptions used to compute the Company’s right-of-use assets and lease liabilities:

	March 31, 2024
Weighted average remaining lease term (in years)		6.5
Weighted average discount rate		3.7	%

As of March 31, 2024, current operating leases had remaining terms between three and eight years with options to extend the lease terms.

Undiscounted future minimum lease payments as of March 31, 2024, by year and in the aggregate, having non-cancelable lease terms in excess of one year were as follows (in thousands):

	Maturities of Operating Lease Liabilities
2024 (1)	$	3,210
2025		4,315
2026		4,395
2027		4,317
2028		4,026
Thereafter		8,052
Total lease payments		28,315
Less: Imputed interest		(2,788	)
Present value of lease payments	$	25,527

(1)Scheduled maturities of lease liabilities represent the period from April 1, 2024 to December 31, 2024.

10. ACCRUED EXPENSES:

Accrued expenses consist of the following (in thousands):

	March 31, 2024		December 31, 2023
PPG Industries, Inc. agreement	$	14,620	$	11,962
Compensation		14,174		29,456
Royalties		2,225		647
Consulting		2,116		2,121
Professional fees		1,258		1,124
Research and development agreements		687		822
Other		7,019		5,948
Accrued expenses	$	42,099	$	52,080

11. RESEARCH AND LICENSE AGREEMENTS WITH ACADEMIC PARTNERS:

The Company has long-standing relationships with a number of academic institutions that undertake funded research projects, including Princeton University (Princeton) and the University of Southern California (USC).

Under the current license agreement among the Company, Princeton and USC, the universities have granted the Company worldwide, exclusive license rights, with rights to sublicense, to make, have made, use, lease and/or sell products and to practice processes based on patent applications and issued patents arising out of research performed by the universities for the Company. The Company recorded royalty expense in connection with this agreement of $1.6 million and $159,000 for the three months ended March 31, 2024 and 2023, respectively.

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The Company also makes payments under the current research agreement with USC on a quarterly basis as actual expenses are incurred. As of March 31, 2024, the Company was obligated to pay USC up to $1.7 million for work to be performed during the remaining term. The Company recorded research and development expense in connection with work performed under the agreement of $267,000 and $282,000 for the three months ended March 31, 2024 and 2023, respectively.

12. OTHER LIABILITIES:

Other liabilities consist of the following (in thousands):

	March 31, 2024		December 31, 2023
Long-term lease liabilities	$	21,945	$	22,855
Long-term taxes payable		15,749		15,749
Other long-term liabilities		282		54
Other liabilities	$	37,976	$	38,658

See Notes 9 and 20 for further explanation on long-term lease liabilities and long-term taxes payable, respectively.

13. EQUITY AND CASH COMPENSATION UNDER THE PPG AGREEMENT:

On September 22, 2011, the Company entered into an Amended and Restated OLED Materials Supply and Service Agreement with PPG (the New OLED Materials Agreement), which, effective as of October 1, 2011, replaced the original OLED Materials Agreement with PPG. The term of the New OLED Materials Agreement, by amendment in February 2021, runs through December 31, 2024, and thereafter is automatically renewed for additional one-year terms, unless terminated by the Company by providing prior notice of one year or terminated by PPG by providing prior notice of two years. The New OLED Materials Agreement contains provisions that are substantially similar to those of the original OLED Materials Agreement. Under the New OLED Materials Agreement, PPG continues to assist the Company in developing its proprietary OLED materials and supplying the Company with those materials for evaluation purposes and for resale to its customers.

Under the New OLED Materials Agreement, the Company compensates PPG on a cost-plus basis for the services provided during each calendar quarter. The Company is required to pay for some of these services in all cash. Up to 50% of the remaining services are payable, at the Company’s sole discretion, in cash or shares of the Company’s common stock, with the balance payable in cash. The actual number of shares of common stock issuable to PPG is determined based on the average closing price for the Company’s common stock during a specified number of days prior to the end of each calendar half-year period ending on March 31 and September 30. If, however, this average closing price is less than $20.00, the Company is required to compensate PPG in cash. No shares have been issued for services rendered by PPG since the inception of the contract.

The Company is also required to reimburse PPG for raw materials used for research and development. The Company records the purchases of these raw materials as a current asset until such materials are used for research and development efforts.

In February 2021, the Company entered into an amendment to the New OLED Materials Agreement extending the term of the agreement and specifying operation and maintenance services to be provided by PPG affiliate, PPG SCM Ireland Limited (PPG SCM), to UDC Ireland, at the Company’s manufacturing site in Shannon, Ireland that UDC Ireland’s wholly-owned subsidiary, OLED Material Manufacturing Limited (OMM), began leasing at such time for the production of OLED materials. OMM purchased the site in September 2023 and the Company amended and restated the February 2021 amendment to reflect OMM’s ownership and PPG SCM’s updated operation and maintenance services after such purchase. Facility improvements have been completed and operations commenced in June 2022. As with the initial New OLED Materials Agreement, the Company compensates PPG on a cost-plus basis for the services provided at the Shannon manufacturing facility.

The Company recorded research and development expense of $4.5 million and $2.0 million for the three months ended March 31, 2024 and 2023, respectively, in relation to the cash portion of the reimbursement of expenses and work performed by PPG, excluding amounts paid for commercial chemicals.

14. SHAREHOLDERS’ EQUITY:

Preferred Stock

The Company’s Amended and Restated Articles of Incorporation authorize it to issue up to 5,000,000 shares of $0.01 par value preferred stock with designations, rights and preferences determined from time-to-time by the Company’s Board of Directors.

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Accordingly, the Company’s Board of Directors is empowered, without shareholder approval, to issue preferred stock with dividend, liquidation, conversion, voting or other rights superior to those of shareholders of the Company’s common stock.

In 1995, the Company issued 200,000 shares of Series A Nonconvertible Preferred Stock (Series A) to American Biomimetics Corporation (ABC) pursuant to a certain Technology Transfer Agreement between the Company and ABC. The Series A shares have a liquidation value of $7.50 per share. Series A shareholders, as a single class, have the right to elect two members of the Company’s Board of Directors. This right has never been exercised. Holders of the Series A shares are entitled to one vote per share on matters which shareholders are generally entitled to vote. The Series A shareholders are not entitled to any dividends.

As of March 31, 2024, the Company had issued 200,000 shares of preferred stock, all of which were outstanding.

Common Stock

The Company’s Amended and Restated Articles of Incorporation authorize it to issue up to 200,000,000 shares of $0.01 par value common stock. Each share of the Company’s common stock entitles the holder to one vote on all matters to be voted upon by the shareholders.

As of March 31, 2024, the Company had issued 48,804,964 shares of common stock, of which 47,439,316 were outstanding. During the three months ended March 31, 2024 and 2023, the Company repurchased no shares of common stock.

Dividends

During the three months ended March 31, 2024, the Company declared and paid cash dividends of $0.40 per common share, or $19.5 million, on the Company’s outstanding common stock.

On April 30, 2024, the Company’s Board of Directors declared a second quarter dividend of $0.40 per share to be paid on June 28, 2024 to all shareholders of record of the Company’s common stock as of the close of business on June 14, 2024. All future dividends will be subject to the approval of the Company’s Board of Directors.

15. ACCUMULATED OTHER COMPREHENSIVE LOSS:

Amounts related to the changes in accumulated other comprehensive loss were as follows (in thousands):

	Unrealized Gain (Loss) on Available-for-Sale Securities			Net Unrealized Gain (Loss) on Retirement Plan (2)			Change in Cumulative Foreign Currency Translation Adjustment			Total			Affected Line Items in the Consolidated Statements of Income
Balance December 31, 2023, net of tax	$	858		$	(1,808	)	$	(136	)	$	(1,086	)
Other comprehensive (loss) gain    before reclassification		(2,666	)		—			(50	)		(2,716	)
Reclassification to net income (1)		—			8			—			8		Selling, general and administrative, research and development and cost of sales
Change during period		(2,666	)		8			(50	)		(2,708	)
Balance March 31, 2024, net of tax	$	(1,808	)	$	(1,800	)	$	(186	)	$	(3,794	)

	Unrealized Gain (Loss) on Available-for-Sale Securities			Net Unrealized Gain (Loss) on Retirement Plan (2)			Change in Cumulative Foreign Currency Translation Adjustment			Total			Affected Line Items in the Consolidated Statements of Income
Balance December 31, 2022, net of tax	$	(7,887	)	$	(10,011	)	$	(554	)	$	(18,452	)
Other comprehensive gain    before reclassification		2,627			—			95			2,722
Reclassification to net income (1)		—			253			—			253		Selling, general and administrative, research and development and cost of sales
Change during period		2,627			253			95			2,975
Balance March 31, 2023, net of tax	$	(5,260	)	$	(9,758	)	$	(459	)	$	(15,477	)

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(1)The Company reclassified amortization of prior service cost and actuarial loss for its retirement plan from accumulated other comprehensive loss to net income of $8,000 and $253,000 for the three months ended March 31, 2024 and 2023, respectively.

(2)Refer to Note 17: Retirement Plan Benefit Liability.

16. STOCK-BASED COMPENSATION:

Equity Compensation Plan

On June 15, 2023, the shareholders of the Company voted to approve the Universal Display Corporation 2023 Equity Compensation Plan (the “Equity Compensation Plan”), which replaced the Universal Display Corporation 2014 Equity Compensation Plan. The Equity Compensation Plan provides for the granting of incentive and nonqualified stock options, shares of common stock, stock appreciation rights and performance units to employees, directors and consultants of the Company. Stock options are exercisable over periods determined by the Company’s Human Capital Committee, but for no longer than 10 years from the grant date. The total number of shares that may be subject to awards under the Equity Compensation Plan is equal to the shares that were available for issuance and not subject to an award under the 2014 Equity Compensation Plan at the time it was replaced by the Equity Compensation Plan, subject to adjustment with respect to shares underlying any outstanding award granted under the Equity Compensation Plan or the 2014 Equity Compensation Plan that may expire, or be terminated, surrendered or forfeited for any reason, without issuance of such shares. As of March 31, 2024, there were 1,347,660 shares that remained available to be granted under the Equity Compensation Plan. The Equity Compensation Plan will terminate on June 15, 2033.

Restricted Stock Awards and Units

The Company has issued restricted stock awards and units to employees and non-employees with vesting terms of one to five years. The fair value is equal to the market price of the Company’s common stock on the date of grant for awards granted to employees. Consistent with the accounting for equity-classified awards issued to employees, our equity-classified nonemployee share-based awards are measured at the grant date fair value. Expense for restricted stock awards and units is amortized ratably over the vesting period for the awards issued to employees and using a graded vesting method for the awards issued to non-employees.

During the three months ended March 31, 2024, the Company granted 84,089 shares of restricted stock awards and restricted stock units to employees and non-employees, which had a total fair value of $13.8 million on the respective dates of grant, and will vest over three to five years from the date of grant, provided that the grantee is still an employee of the Company or is still providing services to the Company on the applicable vesting date.

For the three months ended March 31, 2024 and 2023, the Company recorded, as compensation charges related to all restricted stock awards and units granted to employees and non-employees, selling, general and administrative expense of $2.2 million and $3.1 million, respectively, research and development expense of $1.4 million and $1.5 million, respectively, and cost of sales of $436,000 and $531,000, respectively.

In connection with the vesting of restricted stock awards and units during the three months ended March 31, 2024 and 2023, 31,669 and 46,353 shares, respectively, with aggregate fair values of $5.6 million and $6.4 million, respectively, were withheld in satisfaction of tax withholding obligations and are reflected as a financing activity within the Consolidated Statements of Cash Flows.

For the three months ended March 31, 2024 and 2023, the Company recorded as compensation charges related to all restricted stock units granted to non-employee members of the Scientific Advisory Board, whose unvested shares are marked to market each reporting period, research and development expense of $62,000 and $68,000, respectively.

The Company has granted restricted stock units to non-employee members of the Board of Directors with quarterly vesting over a period of approximately one year. The fair value is equal to the market price of the Company's common stock on the date of grant. The restricted stock units are issued and expense is recognized ratably over the vesting period. For the three months ended March 31, 2024 and 2023, the Company recorded compensation charges for services performed, related to all restricted stock units granted to non-employee members of the Board of Directors, selling, general and administrative expense of $395,000 and $355,000, respectively. In connection with the vesting of the restricted stock, the Company issued to non-employee members of the Board of Directors 2,392 and 3,104 shares, respectively, during the three months ended March 31, 2024 and 2023.

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Performance Unit Awards

Each performance unit award is subject to both a performance-vesting requirement (either performance-based or market-based) and a service-vesting requirement. The performance-based vesting requirement is tied to EBITDA and cash flow achievement, as measured over a specific performance period. The market-based vesting requirement is tied to the Company's total shareholder return (TSR) relative to the TSR of companies comprising the Nasdaq Electronics Components Index, as measured over a three-year performance period. The maximum number of performance units that may vest based on performance is three times the shares granted. Further, if the Company's performance falls below certain thresholds, the performance units will not vest at all.

During the three months ended March 31, 2024, the Company granted 69,600 performance units, of which 34,798 units are subject to performance-based vesting requirements based on three-year cumulative adjusted EBITDA, 17,401 units are subject to performance-based vesting requirements based on three-year cumulative gross margin and 17,401 units are subject to market-based, TSR vesting requirements. The grant date fair value of the performance unit awards granted was $11.4 million for the three months ended March 31, 2024, as determined by the Company’s common stock on date of grant for the units with performance-based vesting and a Monte Carlo simulation model used for the units with market-based vesting.

For the three months ended March 31, 2024 and 2023, the Company recorded selling, general and administrative expense of $2.5 million and reduction in expense of $890,000, respectively, research and development expense of $1.2 million and reduction in expense of $231,000, respectively, and cost of sales expense of $748,000 and reduction in expense of $143,000, respectively, related to the performance units. The reduction of expense was primarily due to current expectations of future vesting as they relate to Company performance.

In connection with the vesting of performance units during the three months ended March 31, 2024 and 2023, 8,160 and 5,350 shares, respectively, with an aggregate fair value of $1.4 million and $750,000, respectively, were withheld in satisfaction of tax withholding obligations and are reflected as a financing activity within the Consolidated Statements of Cash Flows.

Employee Stock Purchase Plan

On April 7, 2009, the Board of Directors of the Company adopted an Employee Stock Purchase Plan (ESPP). The ESPP was approved by the Company’s shareholders and became effective on June 25, 2009. The Company has reserved 1,000,000 shares of common stock for issuance under the ESPP. Unless terminated by the Board of Directors, the ESPP will expire when all reserved shares have been issued.

Eligible employees may elect to contribute to the ESPP through payroll deductions during consecutive three-month purchase periods, the first of which began on July 1, 2009. Each employee who elects to participate will be deemed to have been granted an option to purchase shares of the Company’s common stock on the first day of the purchase period. Unless the employee opts out during the purchase period, the option will automatically be exercised on the last day of the period, which is the purchase date, based on the employee’s accumulated contributions to the ESPP. The purchase price will equal 85% of the lesser of the closing price per share of common stock on the first business day of the period or the last business day of the period.

Employees may allocate up to 10% of their base compensation to purchase shares of common stock under the ESPP; however, each employee may purchase no more than 12,500 shares on a given purchase date, and no employee may purchase more than $25,000 of common stock under the ESPP during a given calendar year.

During the three months ended March 31, 2024 and 2023, the Company issued 4,463 and 5,639 shares, respectively, of its common stock under the ESPP, resulting in proceeds of $639,000 and $518,000, respectively.

For the three months ended March 31, 2024 and 2023, the Company recorded charges of $37,000 and $40,000, respectively, to selling, general and administrative expense, $76,000 and $71,000, respectively, to research and development expense, and $51,000 and $41,000, respectively, to cost of sales related to the ESPP equal to the amount of the discount and the value of the look-back feature.

Scientific Advisory Board Awards

During the three months ended March 31, 2024 and 2023, the Company granted a total of 1,616 and 2,366 shares, respectively, of fully vested common stock to non-employee members of the Scientific Advisory Board for services performed in 2023 and 2022, respectively. The fair value of shares issued to members of the Scientific Advisory Board was $300,000 for both three-month periods.

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17. RETIREMENT PLAN BENEFIT LIABILITY:

On March 18, 2010, the Human Capital Committee and the Board of Directors of the Company approved and adopted the Universal Display Corporation Supplemental Executive Retirement Plan (SERP). The SERP is currently unfunded and includes salary and bonus as part of the plan. The purpose of the SERP is to provide certain of the Company’s key employees with supplemental pension benefits following a cessation of their employment and to encourage their continued employment with the Company. As of March 31, 2024, there were eight participants in the SERP. In December 2022, one of the participants retired and monthly SERP benefit payments commenced in January 2023. The total SERP benefit payments for the three months ended March 31, 2024 were $504,000.

The Company records amounts relating to the SERP based on calculations that incorporate various actuarial and other assumptions, including discount rates, rate of compensation increases, retirement dates and life expectancies. The net periodic costs are recognized as employees render the services necessary to earn the SERP benefits.

The components of net periodic pension cost were as follows (in thousands):

	Three Months Ended March 31,
	2024		2023
Service cost	$	212	$	238
Interest cost		610		724
Amortization of prior service cost		11		204
Amortization of loss		—		120
Total net periodic benefit cost	$	833	$	1,286

18. COMMITMENTS AND CONTINGENCIES:

Commitments

Under the current research agreement with USC, the Company is obligated to make certain payments to USC based on work performed by it under that agreement, and by the University of Michigan (Michigan) under a subcontractor agreement that Michigan has with USC.

Under the terms of the current license agreement among the Company, Princeton and USC, the Company makes royalty payments to Princeton. See Note 11 for further explanation.

The Company has agreements with five executive officers and 11 senior level employees which provide for certain cash and other benefits upon termination of employment of the officer or employee in connection with a change in control of the Company. If a covered person’s employment is terminated in connection with the change in control, the person is entitled to a lump-sum cash payment equal to two times (in the case of the executive officers) or either one or two times (in the case of the senior level employees) the sum of the average annual base salary and bonus of the person and immediate vesting of all stock options and other equity awards that may be outstanding at the date of the change in control, among other items.

In order to manage manufacturing lead times and help ensure adequate material supply, the Company entered into the New OLED Materials Agreement (see Note 13) that allows PPG to procure and produce inventory based upon criteria as defined by the Company. These purchase commitments consist of firm, noncancelable and unconditional commitments. In certain instances, this agreement allows the Company the option to reschedule and adjust the Company’s requirements based on its business needs prior to firm orders being placed. As of March 31, 2024 and December 31, 2023, the Company had purchase commitments for inventory of $29.7 million and $29.8 million, respectively.

Patent Related Challenges and Oppositions

Each major jurisdiction in the world that issues patents provides both third parties and applicants an opportunity to seek a further review of an issued patent. The process for requesting and considering such reviews is specific to the jurisdiction that issued the patent in question, and generally does not provide for claims of monetary damages or a review of specific claims of infringement. The conclusions made by the reviewing administrative bodies tend to be appealable and generally are limited in scope and applicability to the specific claims and jurisdiction in question.

The Company believes that opposition proceedings are frequently commenced in the ordinary course of business by third parties who may believe that one or more claims in a patent do not comply with the technical or legal requirements of the specific jurisdiction in which the patent was issued. The Company views these proceedings as reflective of its goal of obtaining the broadest legally permissible patent coverage permitted in each jurisdiction. Once a proceeding is initiated, as a general matter, the issued patent continues

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to be presumed valid until the jurisdiction’s applicable administrative body issues a final non-appealable decision. Depending on the jurisdiction, the outcome of these proceedings could include affirmation, denial or modification of some or all of the originally issued claims. The Company believes that as OLED technology becomes more established and its patent portfolio increases in size, so will the number of these proceedings.

19. CONCENTRATION OF RISK:

Revenues and accounts receivable from the Company's largest customers were as follows (in thousands):

	% of Total Revenue for the  Three Months Ended March 31,		Accounts Receivable as of
Customer	2024	2023	March 31, 2024
A	41%	30%	$	40,021
B	25%	26%	$	40,165
C	16%	21%	$	15,289

Revenues from outside of North America represented approximately 98% and 97% of consolidated revenue for the three months ended March 31, 2024 and 2023, respectively. Revenues by geographic area are as follows (in thousands):

	Three Months Ended March 31,
Country	2024		2023
South Korea	$	102,398	$	66,060
China		57,470		57,427
Japan		1,254		1,647
Other non-U.S. locations		1,665		1,337
Total non-U.S. locations		162,787		126,471
United States		2,472		3,996
Total revenue	$	165,259	$	130,467

The Company attributes revenue to different geographic areas on the basis of the location of the customer.

Property and equipment, net by geographic area are as follows (in thousands):

	March 31, 2024		December 31, 2023
United States	$	117,389	$	118,250
Ireland		43,703		42,203
Other		14,804		14,697
Total property and equipment, net	$	175,896	$	175,150

Substantially all chemical materials were purchased from one supplier. See Note 13 for further explanation.

20. INCOME TAXES:

The Company is subject to income taxes in both the United States and foreign jurisdictions. The effective income tax rate was 19.4% and 22.8% for the three months ended March 31, 2024 and 2023, respectively. The Company recorded an income tax expense of $13.6 million and $11.8 million for the three months ended March 31, 2024 and 2023, respectively. The discrepancy between the statutory tax rate and the effective tax rate is primarily due to nondeductible employee compensation and U.S. international tax (GILTI and Subpart F) partially offset by the benefit of income taxed in foreign jurisdictions. The effective income tax rate decreased due to a change in U.S. tax regulations associated with the ability to credit Chinese withholding taxes, as well as a change in the capitalization rules for research and development expenses.

In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent on the Company's ability to generate future taxable income to obtain benefit from the reversal of temporary differences, net operating loss carryforwards and tax credits. As part of its assessment, management considers the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies. At this time there is not sufficient evidence to release the valuation allowance that has been recorded for the New Jersey research and development credits and unrealized loss on investments. There are no indicators against the realizability of the remaining net deferred tax asset.

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On December 27, 2018, the Korean Supreme Court, citing prior cases, held that only royalties paid with respect to Korean registered patents are considered Korean source income and subject to Korean withholding tax under the applicable law and interpretation of the Korea-U.S. Tax Treaty. The Company has incurred Korean withholding tax of $14.9 million for each of the years ended December 31, 2018, through December 31, 2022. Based on the Korean Supreme Court decision, a tax refund request on behalf of the Company was filed with the Korean National Tax Service (KNTS) for the entire period from January 1, 2018, to December 31, 2022. The Company received a formal rejection from the KNTS; and in May 2022 filed an appeal with the Korean Tax Tribunal. On December 18th, 2023, the Company received a formal rejection from the Tax Tribunal. Anticipating the rejection of the appeal, in September 2023 the Company filed a petition to the District Court and is awaiting its decision. The Company has been advised by a prominent Korean law firm that there is a more-likely-than-not chance of success. As a result, the Company has recorded a long-term asset of $57.8 million and $60.1 million as of March 31, 2024, and December 31, 2023, respectively for the receipt of the Korean withholding tax. The Company also recorded foreign exchange loss of $2.3 million and $1.0 million for the three months ended March 31, 2024 and 2023 due to the fluctuation of the Korean Won to the U.S. Dollar and resulting remeasurement of this Won-denominated receivable. The Company will amend U.S. federal tax returns for the 2018 to 2022 years when the anticipated refund from KNTS is received to offset the additional tax liability. The Company has recorded a long-term liability of $15.7 million as of March 31, 2024, and December 31, 2023, for the estimated amounts due to the U.S. federal government based on the amendment of the Company's U.S. tax returns, indicating that lower withholding amounts were required.

The Company is not subject to examinations by the federal tax authority for the years prior to 2020. The Company's state and foreign tax returns are open for a period of generally three to four years. The Company is under California tax audit for 2019 and 2020 years, which is in the information-collecting stage.

The above estimates may change in the future and upon settlement.

21. REVENUE RECOGNITION:

The Company recognizes revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers (Topic 606). The standard establishes the principles that an entity shall apply to report useful information to users of financial statements about the nature, amount, timing, and uncertainty of revenue and cash flows from a contract with a customer.

For the three months ended March 31, 2024 and 2023, the Company recorded 98% and 96%, respectively, of its revenue from OLED related sales and 2% and 4%, respectively, from the providing of services through Adesis.

Contract Balances

The following table provides information about assets and liabilities associated with our contracts from customers (in thousands):

	As of March 31, 2024
Accounts receivable	$	119,584
Short-term unbilled receivables		22,440
Long-term unbilled receivables		10,278
Short-term contract assets		2,747
Long-term contract assets		8,688
Short-term deferred revenue		19,157
Long-term deferred revenue		13,292

Short-term and long-term unbilled receivables and contract assets are classified as other current assets and other assets, respectively, on the Consolidated Balance Sheets. Contract assets represent consideration related to the renewal of customer contracts which is recognized over the contract term based on material units sold. The deferred revenue balance as of March 31, 2024 will be recognized as materials are shipped to customers over the remaining contract periods. As of March 31, 2024, the Company had $35.9 million of backlog associated with committed purchase orders from its customers for phosphorescent emitter material. These orders are anticipated to be fulfilled within the next 90 days.

Significant changes in the assets and liabilities balances associated with the Company's contracts from customers for the three months ended March 31, 2024 and 2023 are as follows (in thousands):

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	Three Months Ended March 31, 2024
	Assets			Liabilities
Balance at December 31, 2023	$	42,134		$	(59,719	)
Revenue recognized that was previously included in deferred revenue, net		—			61,095
Increases due to cash received		—			(33,323	)
Cumulative catch-up adjustment arising from changes in estimates of    transaction price, net		—			(502	)
Unbilled receivables recorded, net		2,560			—
Contract assets recorded, net		(541	)		—
Net change		2,019			27,270
Balance at March 31, 2024	$	44,153		$	(32,449	)

	Three Months Ended March 31, 2023
	Assets			Liabilities
Balance at December 31, 2022	$	38,457		$	(63,878	)
Revenue recognized that was previously included in deferred revenue, net		—			41,086
Increases due to cash received		—			(38,153	)
Cumulative catch-up adjustment arising from changes in estimates of    transaction price, net		—			5,683
Unbilled receivables recorded, net		11,878			—
Contract assets recorded, net		(520	)		—
Transferred to receivables from unbilled receivables		(19,983	)		—
Net change		(8,625	)		8,616
Balance at March 31, 2023	$	29,832		$	(55,262	)

The cumulative catch-up adjustment recorded to revenue arising from changes in estimates of transaction price, net was a reduction of $502,000 for three months ended March 31, 2024 as compared to an increase of $5.7 million for the three months ended March 31, 2023. For the three months ended March 31, 2023, the adjustment resulted from an increase in the average price per gram that was primarily due to the decrease in anticipated demand by several of the Company's customers over the remaining lives of their contracts, resulting from changes in global macroeconomic factors.

22. NET INCOME PER COMMON SHARE:

The Company computes earnings per share in accordance with ASC Topic 260, Earnings per Share, which requires earnings per share (EPS) for each class of stock to be calculated using the two-class method. The two-class method is an allocation of income between the holders of common stock and the Company's participating security holders. Under the two-class method, income for the reporting period is allocated between common shareholders and other security holders based on their respective participation rights in undistributed income. Unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents are participating securities and, therefore, are included in computing earnings per share pursuant to the two-class method.

Basic net income per common share is computed by dividing net income allocated to common shareholders by the weighted-average number of shares of common stock outstanding for the period excluding unvested restricted stock units and performance units. Net income allocated to the holders of the Company's unvested restricted stock awards is calculated based on the shareholders proportionate share of weighted average shares of common stock outstanding on an if-converted basis.

For purposes of determining diluted net income per common share, basic net income per share is further adjusted to include the effect of potential dilutive common shares outstanding, including restricted stock units, performance units and the impact of shares to be issued under the Company's Employee Stock Purchase Plan.

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The following table is a reconciliation of net income and the shares used in calculating basic and diluted net income per common share for the three months ended March 31, 2024 and 2023 (in thousands, except share and per share data):

	Three Months Ended March 31,
	2024			2023
Numerator:
Net income	$	56,853		$	39,839
Adjustment for Basic EPS:
Earnings allocated to unvested shareholders		(201	)		(213	)
Adjusted net income	$	56,652		$	39,626
Denominator:
Weighted average common shares outstanding – Basic		47,557,959			47,523,593
Effect of dilutive shares:
Common stock equivalents arising from stock options and ESPP		462			940
Restricted stock awards and units and performance units		70,071			42,474
Weighted average common shares outstanding – Diluted		47,628,492			47,567,007
Net income per common share:
Basic	$	1.19		$	0.83
Diluted	$	1.19		$	0.83

For the three months ended March 31, 2024 and 2023, the combined effects of unvested restricted stock awards, restricted stock units, performance unit awards and stock options of 27,453 and 41,505, respectively, were excluded from the calculation of diluted EPS as their impact would have been antidilutive.

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

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with the unaudited Consolidated Financial Statements and related notes above.

CAUTIONARY STATEMENT

CONCERNING FORWARD-LOOKING STATEMENTS

This discussion and analysis contains some “forward-looking statements.” Forward-looking statements concern possible or assumed future results of operations, including descriptions of our business strategies and customer relationships. These statements often include words such as “believe,” “expect,” “anticipate,” “intend,” “plan,” “estimate,” “seek,” “will,” “may” or similar expressions. These statements are based on assumptions that we have made in light of our experience in the industry, as well as our perceptions of historical trends, current conditions, expected future developments and other factors that we believe are appropriate in these circumstances.

As you read and consider this discussion and analysis, you should not place undue reliance on any forward-looking statements. You should understand that these statements involve substantial risk and uncertainty and are not guarantees of future performance or results. They depend on many factors that are discussed further in the sections entitled (Risk Factors) in our Annual Report on Form 10-K for the year ended December 31, 2023, as supplemented by disclosures in Item 1A of Part II below. Changes or developments in any of these areas could affect our financial results or results of operations and could cause actual results to differ materially from those contemplated in the forward-looking statements.

All forward-looking statements speak only as of the date of this report or the documents incorporated by reference, as the case may be. We do not undertake any duty to update any of these forward-looking statements to reflect events or circumstances after the date of this report or to reflect the occurrence of unanticipated events.

OVERVIEW

We are a leader in the research, development and commercialization of organic light emitting diode (OLED) technologies and materials for use in display applications, such as mobile phones, televisions, monitors, wearables, tablets, portable media devices, notebook computers, personal computers and automotive applications, as well as specialty and general lighting products. Since 1994, we have been engaged and expect to continue to be primarily engaged, in funding and performing research and development activities relating to OLED technologies and materials, and commercializing these technologies and materials. We derive our revenue primarily from the following:

•sales of OLED materials for evaluation, development and commercial manufacturing;

•intellectual property and technology licensing;

•technology development and support, including third-party collaboration efforts and providing support to third parties for commercialization of their OLED products; and

•contract research services in the areas of chemical materials synthesis research, development and commercialization for non-OLED applications.

Material sales relate to our sale of OLED materials for incorporation into our customers’ commercial OLED products or for their OLED development and evaluation activities. Material sales are generally recognized at the time title passes, which is typically at the time of shipment or at the time of delivery, depending upon the contractual agreement between the parties.

We receive license and royalty payments under certain commercial, development and technology evaluation agreements, some of which are non-refundable advances. These payments may include royalty and license fees made pursuant to license agreements and also license fees included as part of certain commercial supply agreements. These payments are included in the estimate of total contract consideration by customer and recognized as revenue over the contract term based on material units sold at the estimated per unit fee over the life of the contract.

On December 2, 2022, we entered into a commercial patent license agreement with Samsung Display Co., Ltd. (SDC), replacing a previous license agreement that had been in place since 2018. This agreement, which covers the manufacture and sale of specified OLED display materials, was effective as of January 1, 2023 and lasts through the end of 2027 with an additional two-year extension option for SDC. Under this agreement, we are being paid a license fee, which includes quarterly and annual payments over the agreement

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term of five years. The agreement conveys to SDC the non-exclusive right to use certain of our intellectual property assets for a limited period of time that is less than the estimated life of the assets.

At the same time that we entered into the current commercial license agreement with SDC, we also entered into a material purchase agreement with SDC, which lasts for the same term as the license agreement and is subject to the same extension option. This new material purchase agreement replaced a previous purchase agreement that had been in place since 2018. Under the material purchase agreement, SDC agrees to purchase from us a minimum amount of red and green phosphorescent emitter materials for use in the manufacture of licensed products. This minimum commitment is subject to SDC’s requirements for phosphorescent emitter materials and our ability to meet these requirements over the term of the supplemental agreement.

In 2015, we entered into an OLED patent license agreement and an OLED commercial supply agreement with LG Display Co., Ltd. (LG Display), which were effective as of January 1, 2015. The terms of these agreements were extended by a January 1, 2021 amendment through the end of 2025. The patent license agreement provides LG Display a non-exclusive, royalty bearing portfolio license to make and sell OLED displays under our patent portfolio. The patent license calls for license fees, prepaid royalties and running royalties on licensed products. The OLED commercial supply agreement provides for the sales of materials for use by LG Display, which may include phosphorescent emitters and host materials. The agreements provide for certain other minimum obligations relating to the volume of material sales anticipated over the life of the agreements as well as minimum royalty revenue.

In 2023, we entered into new long-term, multi-year agreements with BOE Technology Group Co., Ltd. (BOE). Under these agreements, we have granted BOE non-exclusive license rights under various patents owned or controlled by us to manufacture and sell OLED display products. We also supply phosphorescent OLED materials to BOE for use in its licensed products.

In 2019, we entered into an evaluation and commercial supply relationship with Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. (CSOT). In 2020, we entered into long-term, multi-year agreements with CSOT. Under these agreements, we have granted CSOT non-exclusive license rights under various patents owned or controlled by us to manufacture and sell OLED display products. We also supply phosphorescent OLED materials to CSOT for use in its licensed products.

In 2018, we entered into long-term, multi-year OLED patent license and material purchase agreements with Visionox Technology, Inc. (Visionox). Under the license agreement, we have granted certain of Visionox’s affiliates non-exclusive license rights under various patents owned or controlled by us to manufacture and sell OLED display products. The license agreement calls for license fees and running royalties on licensed products. Additionally, we supply phosphorescent OLED materials to Visionox for use in its licensed products. In 2021, we announced an extension of the Visionox agreement by entering into new five-year OLED material supply and license agreements with a new affiliate of Visionox, Visionox Hefei Technology Co. Ltd.

In 2016, we entered into long-term, multi-year OLED patent license and material purchase agreements with Tianma Micro-electronics Co., Ltd. (Tianma). Under the license agreement, we have granted Tianma non-exclusive license rights under various patents owned or controlled by us to manufacture and sell OLED display products. The license agreement calls for license fees and running royalties on Tianma’s sales of licensed products. Additionally, we supply phosphorescent OLED materials to Tianma for use in its licensed products. In 2021, we mutually agreed to extend the terms of both the patent license and material purchase agreements for an additional multi-year term.

In 2016, we acquired Adesis, Inc. (Adesis) which has operations in New Castle and Wilmington, Delaware. Adesis is a contract development and manufacturing organization (CDMO) that provides support services on a contractual basis to third-party customers in the OLED, pharma, biotech, catalysis and other industries. As of March 31, 2024, Adesis employed a team of 142 research scientists, chemists, engineers and laboratory technicians. Prior to our acquisition of Adesis, we utilized more than 50% of Adesis’ technology service and production output. We continue to utilize a significant portion of its technology research capacity for the benefit of our OLED technology development, and Adesis uses the remaining capacity to operate as a CDMO by providing contract research services for non-OLED applications to third-party customers in the above-mentioned industries. Contract research services revenue is earned by providing chemical materials synthesis research, development and commercialization for non-OLED applications on a contractual basis for those third-party customers.

In June 2020, a wholly-owned subsidiary, OVJP Corporation (OVJP Corp), was formed as a Delaware corporation. Based in California, OVJP Corp was founded to advance the commercialization of our proprietary Organic Vapor Jet Printing (OVJP) technology. As of March 31, 2024, 2024, OVJP Corp employed a team of 27 research, mechanical, electrical and software engineers and laboratory technicians. As a direct printing technique, OVJP technology has the potential to offer high deposition rates for large-area OLEDs. In addition, OVJP technology reduces OLED material waste associated with use of a shadow mask (i.e., the waste of material that deposits on the shadow mask itself when fabricating an OLED). By comparison to inkjet printing, an OVJP process does not use liquid solvents and therefore the OLED materials utilized are not limited by their viscosity or solvent solubility. OVJP also avoids generation of solvent wastes and eliminates the additional step of removing residual solvent from the OLED device. We believe the successful implementation

27

of the OVJP technology has the potential to increase the addressable market for large-size OLED panels while also serving another potential growth market for our proprietary PHOLED materials and technologies.

In February 2021, we announced the establishment of a new manufacturing site in Shannon, Ireland and an agreement between UDC Ireland Limited and PPG for the production of our OLED materials. We purchased the site during September 2023. When fully operational, the new facility is expected to double our production capacity and allow for the diversification of our manufacturing base for phosphorescent emitters. The first phase of facility improvements has been completed and operations commenced in June 2022.

We also generate technology development and support revenue earned from development and technology evaluation agreements and commercialization assistance fees.

We anticipate fluctuations in our annual and quarterly results of operations due to uncertainty regarding, among other factors:

•the timing, cost and volume of sales of our OLED materials;

•the timing of our receipt of license fees and royalties, as well as fees for future technology development and evaluation;

•the timing and magnitude of expenditures we may incur in connection with our ongoing research and development and patent-related activities; and

•the timing and financial consequences of our formation of new business relationships and alliances.

RESULTS OF OPERATIONS

Comparison of the Three Months Ended March 31, 2024 and 2023

	Three Months Ended March 31,
	2024			2023			Increase (Decrease)
REVENUE:
Material sales	$	93,284		$	70,190		$	23,094
Royalty and license fees		68,268			55,210			13,058
Contract research services		3,707			5,067			(1,360	)
Total revenue		165,259			130,467			34,792
COST OF SALES		36,969			32,970			3,999
Gross margin		128,290			97,497			30,793
OPERATING EXPENSES:
Research and development		37,985			31,423			6,562
Selling, general and administrative		19,252			15,396			3,856
Amortization of acquired technology and other intangible assets		4,548			2,891			1,657
Patent costs		1,982			2,255			(273	)
Royalty and license expense		1,651			164			1,487
Total operating expenses		65,418			52,129			13,289
OPERATING INCOME		62,872			45,368			17,504
Interest income, net		9,568			6,967			2,601
Other loss, net		(1,943	)		(703	)		(1,240	)
Interest and other loss, net		7,625			6,264			1,361
INCOME BEFORE INCOME TAXES		70,497			51,632			18,865
INCOME TAX EXPENSE		(13,644	)		(11,793	)		(1,851	)
NET INCOME	$	56,853		$	39,839		$	17,014

Revenue

Our total material sales were $93.3 million for the three months ended March 31, 2024, as compared to $70.2 million for the three months ended March 31, 2023, an increase of 33% with a commensurate increase in unit material volume of 37%. The increase in material sales was primarily due to strengthened demand for our emitter materials.

•Green emitter sales for the three months ended March 31, 2024, which include our yellow-green emitters, were $70.8 million as compared to $53.7 million for the three months ended March 31, 2023, with unit material volumes increasing by 33%.

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•Red emitter sales for the three months ended March 31, 2024 were $20.6 million as compared to $16.1 million for the three months ended March 31, 2023, with unit material volumes increasing by 48%.

Revenue from royalty and license fees was $68.3 million for the three months ended March 31, 2024 as compared to $55.2 million for the three months ended March 31, 2023, an increase of 24%. The increase in royalty and license fees was primarily the result of higher unit material volume, partially offset by the change in the cumulative catch-up adjustment between periods as described below.

The cumulative catch-up adjustment recorded to revenue arising from changes in estimates of transaction price, net was a reduction of $502,000 for three months ended March 31, 2024 as compared to an increase of $5.7 million for the three months ended March 31, 2023. For the three months ended March 31, 2023, the adjustment resulted from an increase in the average price per gram that was primarily due to the decrease in anticipated demand by several of our customers over the remaining lives of their contracts, resulting from changes in global macroeconomic factors.

Contract research services revenue was $3.7 million for the three months ended March 31, 2024 as compared to $5.1 million for the three months ended March 31, 2023, a decrease of 27%. The decrease in contract research services revenue was primarily due to reduced demand from several customers of our subsidiary, Adesis, during the three months ended March 31, 2024. Revenue from contract research services consists of revenue earned by Adesis, which provides support services on a contractual basis to third-party customers in the pharma, biotech, catalysis and other industries.

Cost of sales

Cost of sales for the three months ended March 31, 2024 increased by $4.0 million as compared to the three months ended March 31, 2023, primarily due to an increase in the level of materials sales, partially offset by a $3.3 million decrease in inventory reserve expense. As a result of the increase in revenue from material sales and royalty and licenses fees, gross margin for the three months ended March 31, 2024 increased by $30.8 million as compared to the three months ended March 31, 2023, with gross margin as a percentage of revenue increasing to 78% from 75%.

Research and development

Research and development expenses increased to $38.0 million for the three months ended March 31, 2024, as compared to $31.4 million for the three months ended March 31, 2023. The increase in research and development expenses was primarily due to higher operating costs, including increased employee-related expenses, PPG development activity and contract research costs.

Selling, general and administrative

Selling, general and administrative expenses increased to $19.3 million for the three months ended March 31, 2024, as compared to $15.4 million for the three months ended March 31, 2023. The increase in selling, general and administrative expenses was primarily due to an increase in employee-related expenses, including higher stock-based compensation and salaries expenses.

Amortization of acquired technology and other intangible assets

Amortization of acquired technology and other intangible assets was $4.6 million for the three months ended March 31, 2024, as compared to $2.9 million for the three months ended March 31, 2023. The increase was due to the commencement of amortization expense associated with the Merck KGaA patent acquisition that was completed on April 28, 2023.

Patent costs

Patent costs decreased to $2.0 million for the three months ended March 31, 2024, as compared to $2.3 million for the three months ended March 31, 2023. The results in the current year reflected lower internal prosecution related costs.

Royalty and license expense

Royalty and license expense increased to $1.7 million for the three months ended March 31, 2024, as compared to $164,000 for the three months ended March 31, 2023. The increase was due to a one-time expense of $1.5 million in connection with an amendment to our existing amended license agreement, effective as of October 9, 1997, with Princeton University and the University of Southern California.

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Interest and other loss, net

Interest income, net was $9.6 million for the three months ended March 31, 2024, as compared to $7.0 million for the three months ended March 31, 2023. The increase in interest income, net was primarily due to an increase in bond yields on available-for-sale investments held during the three months ended March 31, 2024 as compared to the three months ended March 31, 2023 as well as higher available-for-sale investment balances. Other loss, net primarily consisted of net exchange gains and losses on foreign currency transactions, net investment gains and losses, and rental income. We recorded other loss, net of $1.9 million for the three months ended March 31, 2024 as compared to $703,000 for the three months ended March 31, 2023.

Income tax expense

We are subject to income taxes in the United States and foreign jurisdictions. The effective income tax rate was 19.4% and 22.8% for the three months ended March 31, 2024 and 2023, respectively, and we recorded income tax expense of $13.6 million and $11.8 million, respectively, for those periods. The effective income tax rate decreased due to a change in U.S. tax regulations associated with the ability to credit Chinese withholding taxes, as well as a change in the capitalization rules for research and development expenses.

Liquidity and Capital Resources

Our principal sources of liquidity are our cash and cash equivalents and short-term investments. As of March 31, 2024, we had cash and cash equivalents of $74.0 million, short-term investments of $465.3 million, and long-term U.S. Government bonds investments of $298.9 million for a total of $838.2 million. This compares to cash and cash equivalents of $92.0 million, short-term investments of $422.1 million, and long-term U.S. Government bond investments of $285.5 million for a total of $799.6 million as of December 31, 2023.

Cash provided by operating activities for the three months ended March 31, 2024 was $72.2 million resulting from $56.9 million of net income, $14.5 million from non-cash items including stock-based compensation, depreciation and amortization of intangibles, and $807,000 due to changes in our operating assets and liabilities. Changes in our operating assets and liabilities related to a a decrease in accounts receivable of $20.3 million, an increase in other liabilities of $12.1 million, a decrease in inventory of $2.9 million, and a decrease of other assets of $794,000, partially offset by a decrease in deferred revenue of $27.3 million and a decrease in accounts payable and accrued expenses of $8.0 million.

Cash provided by operating activities for the three months ended March 31, 2023 was $47.6 million resulting from $39.8 million of net income, $5.1 million from non-cash items including depreciation, stock-based compensation and deferred income taxes and $2.7 million due to changes in our operating assets and liabilities. Changes in our operating assets and liabilities related to a decrease in other assets of $14.1 million, an increase in other liabilities of $12.3 million and a decrease in inventory of $9.0 million, partially offset by a decrease in accounts payable and accrued expenses of $24.1 million, a decrease in deferred revenue of $8.6 million, and an increase in accounts receivable of $13,000.

Cash used in investing activities was $64.2 million for the three months ended March 31, 2024, as compared to cash provided by investing activities of $40.7 million for the three months ended March 31, 2023. The increase was due to timing of maturities and purchases of investments resulting in net purchases of $57.0 million for the three months ended March 31, 2024, as compared to net sales and maturities of $49.8 million for the three months ended March 31, 2023, partially offset by a decrease in purchases of property and equipment and intangibles of $1.9 million.

Cash used in financing activities was $25.9 million for the three months ended March 31, 2024, as compared to $23.4 million for the three months ended March 31, 2023. The increase was due to an increase in the cash payment of dividends in the current year of $2.8 million, partially offset by a decrease in the payment of withholding taxes related to stock-based compensation to employees of $123,000 and an increase in the proceeds from issuance of common stock of $121,000.

Working capital was $826.3 million as of March 31, 2024, as compared to $798.3 million as of December 31, 2023. The increase was primarily due to an increase in short-term investments and a decrease in deferred revenue, partially offset by a decrease in accounts receivable.

We anticipate, based on our internal forecasts and assumptions relating to our operations (including, among others, assumptions regarding our working capital requirements, the progress of our research and development efforts, the availability of sources of funding for our research and development work, and the timing and costs associated with the preparation, filing, prosecution, maintenance, defense and enforcement of our patents and patent applications), that we have sufficient cash, cash equivalents and short-term investments to meet our obligations for at least the next twelve months.

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We believe that potential additional financing sources for us include long-term and short-term borrowings and public and private sales of our equity and debt securities. It should be noted, however, that additional funding may be required in the future for research, development and commercialization of our OLED technologies and materials, to obtain, maintain and enforce patents respecting these technologies and materials, and for working capital and other purposes, the timing and amount of which are difficult to ascertain. There can be no assurance that additional funds will be available to us when needed, on commercially reasonable terms or at all, particularly in the current economic environment.

Critical Accounting Policies and Estimates

The discussion and analysis of our financial condition and results of operations is based on our Consolidated Financial Statements, which have been prepared in accordance with U.S. generally accepted accounting principles. The preparation of these Consolidated Financial Statements requires us to make estimates and judgments that affect our reported assets and liabilities, revenues and expenses, and other financial information. Actual results may differ significantly from our estimates under other assumptions and conditions.

We believe that our accounting policies related to revenue recognition and deferred revenue, inventories, and income taxes are our “critical accounting policies” as contemplated by the SEC.

Refer to our Annual Report on Form 10-K for the year ended December 31, 2023, for additional discussion of our critical accounting policies.

Contractual Obligations

Refer to our Annual Report on Form 10-K for the year ended December 31, 2023 for a discussion of our contractual obligations.

Off-Balance Sheet Arrangements

As of March 31, 2024, we had no off-balance sheet arrangements in the nature of guarantee contracts, retained or contingent interests in assets transferred to unconsolidated entities (or similar arrangements serving as credit, liquidity or market risk support to unconsolidated entities for any such assets), or obligations (including contingent obligations) arising out of variable interests in unconsolidated entities providing financing, liquidity, market risk or credit risk support to us, or that engage in leasing, hedging or research and development services with us.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We do not utilize financial instruments for trading purposes and hold no derivative financial instruments, other financial instruments or derivative commodity instruments that could expose us to significant market risk other than our investments disclosed in “Fair Value Measurements” in Note 4 to the Consolidated Financial Statements. We generally invest in investment grade financial instruments to reduce our exposure related to investments. Our primary market risk exposure with regard to such financial instruments is to changes in interest rates, which would impact interest income earned on investments. However, based upon the conservative nature of our investment portfolio and current experience, we do not believe a decrease in investment yields would have a material negative effect on our interest income.

Substantially all our revenue is derived from outside of North America. All revenue is primarily denominated in U.S. dollars and therefore we bear no significant foreign exchange risk.

ITEM 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of March 31, 2024. Based on that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures, as of the end of the period covered by this report, are effective to provide reasonable assurance that the information required to be disclosed by us in reports filed or submitted under the Securities Exchange Act of 1934, as amended, is (i) recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and (ii) accumulated and communicated to our management, including the Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding disclosure. However, a controls system, no matter how well designed and operated, cannot provide absolute assurance that the objectives of the controls system are met, and no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within a company have been detected.

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Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting during the quarter ended March 31, 2024 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II – OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

Patent Related Challenges and Oppositions

Each major jurisdiction in the world that issues patents provides both third parties and applicants an opportunity to seek a further review of an issued patent. The process for requesting and considering such reviews is specific to the jurisdiction that issued the patent in question, and generally does not provide for claims of monetary damages or a review of specific claims of infringement. The conclusions made by the reviewing administrative bodies tend to be appealable and generally are limited in scope and applicability to the specific claims and jurisdiction in question.

We believe that opposition proceedings are frequently commenced in the ordinary course of business by third parties who may believe that one or more claims in a patent do not comply with the technical or legal requirements of the specific jurisdiction in which the patent was issued. We view these proceedings as reflective of its goal of obtaining the broadest legally permissible patent coverage permitted in each jurisdiction. Once a proceeding is initiated, as a general matter, the issued patent continues to be presumed valid until the jurisdiction’s applicable administrative body issues a final non-appealable decision. Depending on the jurisdiction, the outcome of these proceedings could include affirmation, denial or modification of some or all of the originally issued claims. We believe that as OLED technology becomes more established and its patent portfolio increases in size, so will the number of these proceedings.

ITEM 1A. RISK FACTORS

There have been no material changes to the risk factors previously discussed in Part I, Item 1A “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2023.

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

None.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

None.

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ITEM 6. EXHIBITS

The following is a list of the exhibits filed as part of this report. Where so indicated by footnote, exhibits that were previously filed are incorporated by reference. For exhibits incorporated by reference, the location of the exhibit in the previous filing is indicated parenthetically, together with a reference to the filing indicated by footnote.

Exhibit Number	Description
31.1*	Certifications of Steven V. Abramson, Chief Executive Officer, as required by Rule 13a-14(a) or Rule 15d-14(a)
31.2*	Certifications of Brian Millard, Chief Financial Officer, as required by Rule 13a-14(a) or Rule 15d-14(a)
32.1**	Certifications of Steven V. Abramson, Chief Executive Officer, as required by Rule 13a-14(b) or Rule 15d-14(b), and by 18 U.S.C. Section 1350. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.)
32.2**	Certifications of Brian Millard, Chief Financial Officer, as required by Rule 13a-14(b) or Rule 15d-14(b), and by 18 U.S.C. Section 1350. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.)
101.INS*	Inline XBRL Instance Document – the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH*	Inline XBRL Taxonomy Extension Schema with Embedded Linkbase Documents.
104	The cover page of this Quarterly Report on Form 10-Q for the quarter ended March 31, 2024 formatted in Inline XBRL (included in Item 101.INS)

Explanation of footnotes to listing of exhibits:

*	Filed herewith.
**	Furnished herewith.

33

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.

	UNIVERSAL DISPLAY CORPORATION
Date: May 2, 2024	By: /s/ Brian Millard
	Brian Millard
	Vice President, Chief Financial Officer and Treasurer

34

EX-31.1

Exhibit 31.1

CERTIFICATIONS REQUIRED BY

RULE 13a-14(a)/15d-14(a)

I, Steven V. Abramson, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Universal Display Corporation (the “registrant”) for the quarter ended March 31, 2024;

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(s) 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(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	May 2, 2024	By:	/s/ Steven V. Abramson
			Steven V. Abramson
			President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATIONS REQUIRED BY

RULE 13a-14(a)/15d-14(a)

I, Brian Millard, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Universal Display Corporation (the “registrant”) for the quarter ended March 31, 2024;

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(s) 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(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	May 2, 2024	By:	/s/ Brian Millard
			Brian Millard
			Vice President, Chief Financial Officer and Treasurer

EX-32.1

Exhibit 32.1

CERTIFICATIONS REQUIRED BY

RULE 13a-14(b)/15d-14(b) AND 18 U.S.C. SECTION 1350

In connection with the quarterly report of Universal Display Corporation (the “Company”) on Form 10-Q for the quarter ended March 31, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Steven V. Abramson, President and Chief Executive Officer of the Company, hereby certify, based on my knowledge, that:

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

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

Date:	May 2, 2024	By:	/s/ Steven V. Abramson
			Steven V. Abramson
			President and Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATIONS REQUIRED BY

RULE 13a-14(b)/15d-14(b) AND 18 U.S.C. SECTION 1350

In connection with the quarterly report of Universal Display Corporation (the “Company”) on Form 10-Q for the quarter ended March 31, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Brian Millard, Vice President and Chief Financial Officer of the Company, hereby certify, based on my knowledge, that:

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

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

Date:	May 2, 2024	By:	/s/ Brian Millard
			Brian Millard
			Vice President, Chief Financial Officer and Treasurer

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	Mar. 31, 2024	Apr. 25, 2024
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Entity Registrant Name	UNIVERSAL DISPLAY CORPORATION
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Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		47,439,488

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CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
CURRENT ASSETS:
Cash and cash equivalents	$ 74,012	$ 91,985
Short-term investments	465,293	422,137
Accounts receivable	119,584	139,850
Inventory	172,905	175,795
Other current assets	89,478	87,365
Total current assets	921,272	917,132
PROPERTY AND EQUIPMENT, net of accumulated depreciation of $149,062 and $143,908	175,896	175,150
ACQUIRED TECHNOLOGY, net of accumulated amortization of $191,043 and $186,850	86,132	90,325
OTHER INTANGIBLE ASSETS, net of accumulated amortization of $10,769 and $10,414	6,519	6,874
GOODWILL	15,535	15,535
INVESTMENTS	312,939	299,548
DEFERRED INCOME TAXES	63,040	59,108
OTHER ASSETS	102,382	105,289
TOTAL ASSETS	1,683,715	1,668,961
CURRENT LIABILITIES:
Accounts payable	12,841	10,933
Accrued expenses	42,099	52,080
Deferred revenue	19,157	47,713
Other current liabilities	20,882	8,096
Total current liabilities	94,979	118,822
DEFERRED REVENUE	13,292	12,006
RETIREMENT PLAN BENEFIT LIABILITY	52,568	52,249
OTHER LIABILITIES	37,976	38,658
Total liabilities	198,815	221,735
COMMITMENTS AND CONTINGENCIES (Note 18)
SHAREHOLDERS' EQUITY:
Preferred Stock, par value $0.01 per share, 5,000,000 shares authorized, 200,000 shares of Series A Nonconvertible Preferred Stock issued and outstanding (liquidation value of $7.50 per share or $1,500)	2	2
Common Stock, par value $0.01 per share, 200,000,000 shares authorized, 48,804,964 and 48,731,026 shares issued, and 47,439,316 and 47,365,378 shares outstanding, at March 31, 2024 and December 31, 2023, respectively	488	487
Additional paid-in capital	702,609	699,554
Retained earnings	826,879	789,553
Accumulated other comprehensive loss	(3,794)	(1,086)
Treasury stock, at cost (1,365,648 shares at March 31, 2024 and December 31, 2023)	(41,284)	(41,284)
Total shareholders’ equity	1,484,900	1,447,226
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 1,683,715	$ 1,668,961

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CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 149,062	$ 143,908
Finite-Lived Intangible Assets, Accumulated Amortization	191,043	186,850
Other Finite-Lived Intangible Assets, Accumulated Amortization	$ 10,769	$ 10,414
SHAREHOLDERS' EQUITY:
Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, shares authorized ( in shares)	5,000,000	5,000,000
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, shares authorized (in shares)	200,000,000	200,000,000
Common Stock, shares issued (in shares)	48,804,964	48,731,026
Common Stock, shares outstanding (in shares)	47,439,316	47,365,378
Treasury Stock, Number of Shares and Restriction Disclosures [Abstract]
Treasury Stock, Preferred, Shares	1,365,648	1,365,648
Series A Nonconvertible Preferred Stock
Shareholders' Equity A Nonconvertible Preferred Stock
Preferred Stock, shares issued (in shares)	200,000	200,000
Preferred Stock, shares outstanding (in shares)	200,000	200,000
Preferred Stock, liquidation value per share (in dollars per share)	$ 7.5	$ 7.5
Preferred Stock, liquidation value	$ 1,500	$ 1,500

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CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
REVENUE:
Total revenue	$ 165,259	$ 130,467
COST OF SALES	36,969	32,970
Gross margin	128,290	97,497
OPERATING EXPENSES:
Research and development	37,985	31,423
Selling, general and administrative	19,252	15,396
Amortization of acquired technology and other intangible assets	4,548	2,891
Patent costs	1,982	2,255
Royalty and license expense	1,651	164
Total operating expenses	65,418	52,129
OPERATING INCOME	62,872	45,368
Interest income, net	9,568	6,967
Other loss, net	(1,943)	(703)
Interest and other loss, net	7,625	6,264
INCOME BEFORE INCOME TAXES	70,497	51,632
INCOME TAX EXPENSE	(13,644)	(11,793)
NET INCOME	$ 56,853	$ 39,839
NET INCOME PER COMMON SHARE:
BASIC	$ 1.19	$ 0.83
DILUTED	$ 1.19	$ 0.83
WEIGHTED AVERAGE SHARES USED IN COMPUTING NET INCOME PER OMMON SHARE:
BASIC	47,557,959	47,523,593
DILUTED	47,628,492	47,567,007
CASH DIVIDENDS DECLARED PER COMMON SHARE	$ 0.4	$ 0.35
Material Sales
REVENUE:
Total revenue	$ 93,284	$ 70,190
Royalty And License Fees
REVENUE:
Total revenue	68,268	55,210
Contract Research Services
REVENUE:
Total revenue	$ 3,707	$ 5,067

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 56,853	$ 39,839
OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX:
Unrealized (loss) gain on available-for-sale securities, net of tax of none and ($733), respectively	(2,666)	2,627
Amortization of prior service cost and actuarial loss for retirement plan included in net periodic pension costs, net of tax of ($3) and ($71), respectively	8	253
Change in cumulative foreign currency translation adjustment	(50)	95
TOTAL OTHER COMPREHENSIVE (LOSS) INCOME	(2,708)	2,975
COMPREHENSIVE INCOME	$ 54,145	$ 42,814

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Unrealized (loss) gain on available-for-sale securities, tax	$ 0	$ (733)
Amortization of prior service cost and actuarial loss for retirement plan included in net periodic pension costs, tax	$ (3)	$ (71)

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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Preferred Stock Series A Nonconvertible Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
BALANCE at Dec. 31, 2022	$ 1,275,369	$ 2	$ 491	$ 681,335	$ 653,277	$ (18,452)	$ (41,284)
BALANCE (in shares) at Dec. 31, 2022		200,000	49,136,030				1,365,648
Net income	39,839				39,839
Other comprehensive income	2,975					2,975
Cash dividend	(16,769)				(16,769)
Issuance of common stock to employees	3,854		$ 1	3,853
Issuance of common stock to employees (in shares)			126,846
Shares withheld for employee taxes	(7,181)			(7,181)
Shares withheld for employee taxes (in shares)			(51,703)
Cancellation of restricted stock awards			$ (5)	5
Cancellation of restricted stock awards (in shares)			(526,241)
Issuance of common stock to Board of Directors and Scientific Advisory Board	723			723
Issuance of common stock to Board of Directors and Scientific Advisory Board (in shares)			6,896
Issuance of common stock to employees under an ESPP	655			655
Issuance of common stock to employees under an ESPP (in shares)			5,639
BALANCE at Mar. 31, 2023	1,299,465	$ 2	$ 487	679,390	676,347	(15,477)	$ (41,284)
BALANCE (in shares) at Mar. 31, 2023		200,000	48,697,467				1,365,648
BALANCE at Dec. 31, 2023	1,447,226	$ 2	$ 487	699,554	789,553	(1,086)	$ (41,284)
BALANCE (in shares) at Dec. 31, 2023		200,000	48,731,026				1,365,648
Net income	56,853				56,853
Other comprehensive income	(2,708)					(2,708)
Cash dividend	(19,527)				(19,527)
Issuance of common stock to employees	8,553		$ 1	8,552
Issuance of common stock to employees (in shares)			103,752
Shares withheld for employee taxes	(7,058)			(7,058)
Shares withheld for employee taxes (in shares)			(39,829)
Issuance of common stock to Board of Directors and Scientific Advisory Board	758			758
Issuance of common stock to Board of Directors and Scientific Advisory Board (in shares)			5,552
Issuance of common stock to employees under an ESPP	803			803
Issuance of common stock to employees under an ESPP (in shares)			4,463
BALANCE at Mar. 31, 2024	$ 1,484,900	$ 2	$ 488	$ 702,609	$ 826,879	$ (3,794)	$ (41,284)
BALANCE (in shares) at Mar. 31, 2024		200,000	48,804,964				1,365,648

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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 56,853	$ 39,839
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	6,616	6,496
Amortization of intangibles	4,548	2,891
Amortization of premium and discount on investments, net	(2,236)	(3,597)
Stock-based compensation to employees	9,174	4,415
Deferred income tax benefit	(3,936)	(5,936)
Retirement plan expense, net of benefit payments	330	782
Decrease (increase) in assets:
Accounts receivable	20,266	(13)
Inventory	2,890	8,975
Other current assets	(2,113)	8,598
Other assets	2,907	5,515
Increase (decrease) in liabilities:
Accounts payable and accrued expenses	(7,977)	(24,116)
Other current liabilities	12,786	12,874
Deferred revenue	(27,270)	(8,616)
Other liabilities	(682)	(486)
Net cash provided by operating activities	72,156	47,621
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(7,206)	(9,098)
Purchases of intangibles	0	(51)
Purchases of investments	(99,947)	(65,207)
Proceeds from sale and maturity of investments	42,970	115,031
Net cash (used in) provided by investing activities	(64,183)	40,675
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock	639	518
Payment of withholding taxes related to stock-based compensation to employees	(7,058)	(7,181)
Cash dividends paid	(19,527)	(16,769)
Net cash used in financing activities	(25,946)	(23,432)
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(17,973)	64,864
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	91,985	93,430
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 74,012	$ 158,294

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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) Non-Cash Activities - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Other Significant Noncash Transactions [Line Items]
Unrealized gain (loss) on available-for-sale securities	$ (2,666)	$ 3,202
Net change in accounts payable and accrued expenses related to purchases of property and equipment	(156)	766
Cash paid for income taxes, net of refunds	5,085	4,961
Common Stock Issued to Board of Directors and Scientific Advisory Board that was Earned and Accrued for in Previous Period [Member]
Other Significant Noncash Transactions [Line Items]
Other significant noncash transaction, value of consideration received	$ 300	$ 300

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BUSINESS

3 Months Ended

Mar. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

BUSINESS

1. BUSINESS:

Universal Display Corporation and its subsidiaries (the Company) is a leader in the research, development and commercialization of organic light emitting diode (OLED) technologies and materials for use in display and solid-state lighting applications. OLEDs are thin, lightweight and power-efficient solid-state devices that emit light and can be manufactured on both flexible and rigid substrates, making them highly suitable for use in full-color displays and as lighting products. OLED displays are capturing a growing share of the display market, especially in the mobile phone, television, monitor, wearable, tablet, notebook and personal computer, augmented reality (AR), virtual reality (VR) and automotive markets. The Company believes this is because OLEDs offer potential advantages over competing display technologies with respect to power efficiency, contrast ratio, viewing angle, video response time, form factor and manufacturing cost. The Company also believes that OLED lighting products have the potential to replace many existing light sources in the future because of their high-power efficiency, excellent color rendering index, low operating temperature and novel form factor. The Company’s technology leadership, intellectual property position, and more than 20 years of experience working closely with leading OLED display manufacturers are some of the competitive advantages that should enable the Company to continue to share in the revenues from OLED displays and lighting products as they gain wider acceptance.

The Company’s primary business strategy is to (1) develop new OLED materials and sell existing and new materials to product manufacturers of products for display applications, such as mobile phones, televisions, monitors, wearables, tablets, portable media devices, notebook computers, personal computers and automotive applications, and specialty and general lighting products; and (2) further develop and either license or otherwise commercialize the Company’s proprietary OLED material, device design and manufacturing technologies to those manufacturers. The Company has established a significant portfolio of proprietary OLED technologies and materials, primarily through internal research and development efforts and acquisitions of patents and patent applications, as well as maintaining long-standing, and establishing new relationships with world-class universities, research institutions and strategic manufacturing partnerships. The Company currently owns, exclusively licenses or has the sole right to sublicense more than 6,000 patents issued and pending worldwide.

The Company manufactures and sells its proprietary OLED materials to customers for evaluation and use in commercial OLED products. The Company also enters into agreements with manufacturers of OLED display and lighting products under which it grants them licenses to practice under the Company’s patents and to use the Company's proprietary know-how. At the same time, the Company works with these and other companies that are evaluating the Company's OLED material, device design and manufacturing technologies for possible use in commercial OLED display and lighting products.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

3 Months Ended

Mar. 31, 2024

Accounting Policies [Abstract]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:

Interim Financial Information

In the opinion of management, the accompanying unaudited Consolidated Financial Statements have been prepared in accordance with the requirements of the Securities and Exchange Commission for interim financial reporting and contain all adjustments (consisting of only normal recurring adjustments) necessary to present fairly the Company’s financial position as of March 31, 2024 and results of operations for the three months ended March 31, 2024 and 2023, and cash flows for the three months ended March 31, 2024 and 2023. While management believes that the disclosures presented are adequate to make the information not misleading, these unaudited Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the notes thereto in the Company’s latest year-end Consolidated Financial Statements, which are included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023. The results of the Company’s operations for any interim period are not necessarily indicative of the results of operations for any other interim period or for the full year.

Principles of Consolidation

The Consolidated Financial Statements include the accounts of Universal Display Corporation and its wholly owned subsidiaries, UDC, Inc., UDC Ireland Limited (UDC Ireland), Universal Display Corporation Hong Kong, Limited, Universal Display Corporation Korea, Y.H. (UDC Korea), Universal Display Corporation Japan GK, Universal Display Corporation China, Ltd., Adesis, Inc. (Adesis), UDC Ventures LLC, OVJP Corporation (OVJP Corp) and OLED Material Manufacturing Limited (OMM). All intercompany transactions and accounts have been eliminated.

Reclassification of Prior Year Presentation

Certain prior year adjustments to reconcile net income to net cash provided by operating activities have been reclassified on the Consolidated Statements of Cash Flows to conform to the current year presentation. Stock-based compensation activity has been consolidated and includes stock-based compensation to employees, Board of Directors, and Scientific Advisory Board.

Management’s Use of Estimates

The preparation of financial statements in conformity with U.S. generally accepted accounting principles (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The estimates made are principally in the areas of revenue recognition including estimates of material unit sales and royalties, the useful life of acquired intangibles, lease liabilities, right-of-use assets, the use and recoverability of inventories, intangibles, investments and income taxes including realization of deferred tax assets, stock-based compensation and retirement benefit plan liabilities. Actual results could differ from those estimates.

Inventories

Inventories consist of raw materials, work-in-process and finished goods, and are stated at the lower of cost, determined on a first-in, first-out basis, or net realizable value. Inventory valuation and firm committed purchase order assessments are performed on a quarterly basis and those items that are identified to be obsolete or in excess of forecasted usage are written down to their estimated realizable value. Estimates of realizable value are based upon management’s analyses and assumptions, including, but not limited to, forecasted sales levels by product, expected product lifecycle, product development plans and future demand requirements. A 12-month rolling forecast based on factors, including, but not limited to, production cycles, anticipated product orders, marketing forecasts, backlog, and shipment activities is used in the inventory analysis. If market conditions are less favorable than forecasts or actual demand from customers is lower than estimates, additional inventory write-downs may be required. If demand is higher than expected, inventories that had previously been written down may be sold.

Fair Value of Financial Instruments

The carrying values of accounts receivable, other current assets, accounts payable and other current liabilities approximate fair value in the accompanying Consolidated Financial Statements due to the short-term nature of those instruments. The Company’s other financial instruments, which include cash equivalents and investments (excluding minority equity investments) are carried at fair value.

Minority Equity Investments

The Company accounts for minority equity investments in companies that are not accounted for under the equity method as equity securities without readily determinable fair values. The value of these securities is based on original cost less impairments, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or similar investment in the same issuer. Under this method, the share of income or loss of such companies is not included in the Consolidated Statements of Income. The carrying value of these investments is included in investments on the Consolidated Balance Sheets.

The Company’s policy is to recognize an impairment in the value of its minority equity investments when evidence of an impairment exists. Factors considered in the assessment include a significant adverse change in the regulatory, economic, or technological environment, the completion of new equity financing that may indicate a decrease in value, the failure to complete new equity financing arrangements after seeking to raise additional funds, or the commencement of proceedings under which the assets of the business may be placed in receivership or liquidated to satisfy the claims of debt and equity stakeholders. The impairment in the value of minority equity investments is included in the other loss, net line item on the Consolidated Statements of Income.

Leases

The Company is a lessee in operating leases primarily incurred to facilitate manufacturing, research and development, and selling, general and administrative activities. At contract inception, the Company determines if an arrangement is or contains a lease, and if so recognizes a right-of-use asset and lease liability at the lease commencement date. For operating leases, the lease liability is measured at the present value of the unpaid lease payments at the lease commencement date, whereas for finance leases, the lease liability is initially measured at the present value of the unpaid lease payments and subsequently measured at amortized cost using the interest method. Operating lease right-of-use assets are included in other assets on the Consolidated Balance Sheets. The short-term portion of operating lease liabilities is included in other current liabilities on the Consolidated Balance Sheets and the long-term portion is included

in other liabilities on the Consolidated Balance Sheets. As of March 31, 2024, the Company had no leases that qualified as financing arrangements.

Key estimates and judgments include how the Company determines the discount rate used to discount the unpaid lease payments to present value and the lease term. The Company monitors for events or changes in circumstances that could potentially require recognizing an impairment loss.

Revenue Recognition and Deferred Revenue

Material sales relate to the Company’s sale of its OLED materials for incorporation into its customers’ commercial OLED products or for their OLED development and evaluation activities. Revenue associated with material sales is generally recognized at the time title passes, which is typically at the time of shipment or at the time of delivery, depending upon the contractual agreement between the parties. Revenue may be recognized after control of the material passes in the event the transaction price includes variable consideration. For example, a customer may be provided an extended opportunity to stock materials prior to use in mass production and given a general right of return not conditioned on breaches of warranties associated with the specific product. In such circumstances, revenue will be recognized at the earlier of the expiration of the customer’s general right of return or once it becomes unlikely that the customer will exercise its right of return.

The vast majority of revenue attributed to material sales is determined through technology license agreements and material supply agreements the terms of which are jointly agreed upon with the Company’s customers. The remaining revenue recognized is in the form of contract research services revenue earned by the Company’s subsidiary, Adesis, Inc., and the Company’s occasional material sales to smaller customers. None of the revenue recognized during the three months ended March 31, 2024 or 2023 resulted solely from royalty or license fee arrangements as to which there were not associated material sales.

The rights and benefits to the Company’s OLED technologies are conveyed to the customer through technology license agreements and material supply agreements. The Company believes that the licenses and materials sold under these combined agreements are not distinct from each other for financial reporting purposes and as such, they are accounted for as a single performance obligation. Accordingly, total contract consideration is estimated and recognized over the contract term based on material units sold at the estimated per unit fee over the life of the contract. Total contract consideration is allocated to material sales and royalty and licensing fees on the Consolidated Statements of Income based on contract pricing.

Various estimates are relied upon to recognize revenue. The Company estimates total material units to be purchased by its customers over the contract term based on historical trends, industry estimates and its forecast process. Management uses the expected value method to estimate the material per unit fee. Additionally, management estimates the sales-based portion of royalty revenue based on the estimated net sales revenue of its customers over the contract term.

Contract research services revenue is revenue earned by Adesis by providing chemical materials synthesis research, development and commercialization for non-OLED applications on a contractual basis. These services range from intermediates for structure-activity relationship studies, reference agents and building blocks for combinatorial synthesis, re-synthesis of key intermediates, specialty organic chemistry needs, and selective toll manufacturing. These services are provided to third-party pharmaceutical and life sciences firms and other technology firms at fixed costs or predetermined rates on a contract basis. Revenue is recognized as services are performed with billing schedules and payment terms negotiated on a contract-by-contract basis. Payments received in excess of revenue recognized are recorded as deferred revenue. In other cases, services may be provided and revenue is recognized before the customer is invoiced. In these cases, revenue recognized will exceed amounts billed and the difference, representing amounts which are currently unbillable to the customer pursuant to contractual terms, is recorded as an unbilled receivable.

Technology development and support revenue is revenue earned from development and technology evaluation agreements and commercialization assistance fees. Technology development and support revenue is included in contract research services on the Consolidated Statements of Income.

On December 2, 2022, the Company entered into a commercial patent license agreement with Samsung Display Co., Ltd. (SDC), replacing a previous license agreement that had been in place since 2018. This agreement, which covers the manufacture and sale of specified OLED display materials, was effective as of January 1, 2023 and lasts through the end of 2027 with an additional two-year extension option for SDC. Under this agreement, the Company is being paid a license fee, which includes quarterly and annual payments over the agreement term of five years. The agreement conveys to SDC the non-exclusive right to use certain of the Company's intellectual property assets for a limited period of time that is less than the estimated life of the assets.

At the same time the Company entered into the current commercial license agreement with SDC, the Company also entered into a new supplemental material purchase agreement with SDC, which lasts for the same term as the license agreement and is subject to the

same extension option. This new material purchase agreement replaced a previous purchase agreement that had been in place since 2018. Under the supplemental material purchase agreement, SDC agrees to purchase red and green phosphorescent emitter materials from the Company for use in the manufacture of licensed products. This amount purchased is subject to SDC’s requirements for phosphorescent emitter materials and the Company’s ability to meet these requirements over the term of the supplemental agreement.

In 2015, the Company entered into an OLED patent license agreement and an OLED commercial supply agreement with LG Display Co., Ltd. (LG Display), which were effective as of January 1, 2015. The terms of these agreements were extended by a January 1, 2021 amendment through the end of 2025. The patent license agreement provides LG Display a non-exclusive, royalty bearing portfolio license to make and sell OLED displays under the Company's patent portfolio. The patent license calls for license fees, prepaid royalties and running royalties on licensed products. The OLED commercial supply agreement provides for the sale of materials for use by LG Display, which may include phosphorescent emitters and host materials. The agreements provide for certain other minimum obligations relating to the volume of material sales anticipated over the lives of the agreements as well as minimum royalty revenue.

In 2023, the Company entered into new long-term, multi-year agreements with BOE Technology Group Co., Ltd. (BOE). Under these agreements, the Company has granted BOE non-exclusive license rights under various patents owned or controlled by the Company to manufacture and sell OLED display products. The Company supplies phosphorescent OLED materials to BOE for use in its licensed products.

In 2019, the Company entered into an evaluation and commercial supply relationship with Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. (CSOT). In 2020, the Company entered into long-term, multi-year agreements with CSOT. Under these agreements, the Company has granted CSOT non-exclusive license rights under various patents owned or controlled by the Company to manufacture and sell OLED display products. The Company also supplies phosphorescent OLED materials to CSOT for use in its licensed products.

In 2018, the Company entered into long-term, multi-year OLED patent license and material purchase agreements with Visionox Technology, Inc. (Visionox). Under the license agreement, the Company granted certain of Visionox’s affiliates non-exclusive license rights under various patents owned or controlled by the Company to manufacture and sell OLED display products. The license agreement calls for license fees and running royalties on licensed products. Additionally, the Company supplies phosphorescent OLED materials to Visionox for use in its licensed products. In 2021, the Company announced that it had extended the Visionox agreement by entering into new five-year OLED material supply and license agreements with a new affiliate of Visionox, Visionox Hefei Technology Co. Ltd.

In 2016, the Company entered into long-term, multi-year OLED patent license and material purchase agreements with Tianma Micro-electronics Co., Ltd. (Tianma). Under the license agreement, the Company has granted Tianma non-exclusive license rights under various patents owned or controlled by the Company to manufacture and sell OLED display products. The license agreement calls for license fees and running royalties on licensed products. Additionally, the Company supplies phosphorescent OLED materials to Tianma for use in its licensed products. In 2021, the parties extended the terms of both the patent license and material purchase agreements for an additional multi-year-term.

All material sales transactions that are not variable consideration transactions are billed and due within 90 days and substantially all are transacted in U.S. dollars.

Cost of Sales

Cost of sales consists of labor and material costs associated with the production of materials processed at the facilities of the Company's manufacturing partner, PPG Industries, Inc. (PPG) and at the Company's internal facilities. The Company’s portion of cost of sales also includes depreciation of manufacturing equipment, as well as manufacturing overhead costs and inventory adjustments for excess and obsolete inventory.

Research and Development

Expenditures for research and development are charged to expense as incurred.

Patent Costs

Costs associated with patent applications, patent prosecution, patent defense and the maintenance of patents are charged to expense as incurred. Costs to successfully defend a challenge to a patent are capitalized to the extent of an evident increase in the value of the patent. Costs that relate to an unsuccessful outcome are charged to expense.

Amortization of Acquired Technology

Amortization costs primarily relate to technology acquired from Merck KGaA, Darmstadt, Germany (Merck KGaA) and BASF SE (BASF). The Merck KGaA acquisition was completed on April 28, 2023 and the BASF acquisition was completed during the year ended December 31, 2016. Acquisition costs are being amortized over a period of 10 years for the Merck KGaA and BASF patents.

Amortization of Other Intangible Assets

Other intangible assets from the Adesis acquisition are being amortized over a period of 10 to 15 years. See Note 7 for further discussion.

Translation of Foreign Currency Financial Statements and Foreign Currency Transactions

The Company’s reporting currency is the U.S. dollar. The functional currency for the UDC Ireland and UDC Korea subsidiaries are also the U.S. dollar and the functional currency for the OMM subsidiary and each of the Company's other Asia-Pacific foreign subsidiaries is its respective local currency. The Company translates the amounts included in the Consolidated Statements of Income from OMM and its Asia-Pacific foreign subsidiaries into U.S. dollars at weighted-average exchange rates, which the Company believes are representative of the actual exchange rates on the dates of the transactions. The Company's OMM subsidiary and each of the Company's other Asia-Pacific foreign subsidiaries' assets and liabilities are translated into U.S. dollars from the local currency at the actual exchange rates as of the end of each reporting date, and the Company records the resulting foreign exchange translation adjustments in the Consolidated Balance Sheets as a component of accumulated other comprehensive loss. The overall effect of the translation of foreign currency and foreign currency transactions to date has been insignificant.

Income Taxes

Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The Company recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount of which the likelihood of realization is greater than 50%. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The Company records interest and penalties, if any, related to unrecognized tax benefits as a component of tax expense.

Share-Based Payment Awards

The Company recognizes in the Consolidated Statements of Income the grant-date fair value of equity-based awards such as shares issued under employee stock purchase plans, restricted stock awards, restricted stock units and performance unit awards issued to employees and directors.

The grant-date fair value of stock awards is based on the closing price of the stock on the date of grant. The fair value of share-based awards is recognized as compensation expense on a straight-line basis over the requisite service period, net of forfeitures. The Company issues new shares upon the respective grant, exercise or vesting of the share-based payment awards, as applicable.

Performance unit awards are subject to either a performance-based or market-based vesting requirement. For performance-based vesting, the grant-date fair value of the award, based on fair value of the Company's common stock, is recognized over the service period based on an assessment of the likelihood that the applicable performance goals will be achieved, and compensation expense is periodically adjusted based on actual and expected performance. Compensation expense for performance unit awards with market-based vesting is calculated based on the estimated fair value as of the grant date utilizing a Monte Carlo simulation model and is recognized over the service period on a straight-line basis.

Recent Accounting Pronouncements

Adoption of New Accounting Standards

In June 2022, the FASB issued ASU No. 2022-03, Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions. Under this standard, a contractual restriction on the sale of an equity security is not considered in measuring the security's fair value. The standard also requires certain disclosures for equity securities that are subject to

contractual restrictions. The adoption of ASU 2022-03, beginning on January 1, 2024, did not have an impact on the Consolidated Financial Statements and related disclosures.

Accounting Standards Issued But Not Yet Adopted

In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The standard improves the reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. ASU 2023-07 becomes effective during the annual period ending December 31, 2024. The Company is evaluating the potential impact of this standard on its Consolidated Financial Statements and related disclosures.

In December 2023, the FASB issued ASU No. 2023-09, Improvements to Income Tax Disclosures (Topic 740). The standard enhances to the annual income tax disclosures to address investor requests for more information about the tax risks and opportunities present in an entity's worldwide operations. ASU 2023-09 becomes effective January 1, 2025, and the Company is evaluating the potential impact of this standard on its income tax disclosures.

In March 2024, the FASB issued ASU No. 2024-01, Compensation - Stock Compensation (Topic 718). The standard provides guidance to reduce complexity and diversity in practice in determining whether a profits interest award is accounted for as a share-based payment. Early adoption is permitted. This guidance can be applied either retrospectively to all prior periods presented in the financial statements or prospectively to profits interest or similar awards granted or modified on or after the effective date for our application of this guidance. ASU 2024-01 becomes effective January 1, 2025, and the Company is evaluating the potential impact of this standard on its Consolidated Financial Statements and related disclosures.

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CASH, CASH EQUIVALENTS AND INVESTMENTS

3 Months Ended

Mar. 31, 2024

Cash and Cash Equivalents [Abstract]

CASH, CASH EQUIVALENTS AND INVESTMENTS

3. CASH, CASH EQUIVALENTS AND INVESTMENTS:

The Company’s portfolio of marketable fixed income securities consists of U.S. Government bonds and corporate bonds. The Company considers all highly liquid debt instruments purchased with an original maturity (maturity at the purchase date) of three months or less to be cash equivalents. The Company classifies its remaining debt security investments as available-for-sale. These debt securities are carried at fair market value, with unrealized gains and losses reported in shareholders’ equity. Gains or losses on securities sold are based on the specific identification method.

Cash and Cash Equivalents

The following table provides details regarding the Company’s portfolio of cash and cash equivalents (in thousands):

	Amortized		Unrealized				Aggregate Fair
Cash and Cash Equivalents Classification	Cost		Gains		(Losses)		Market Value
March 31, 2024
Cash accounts in banking institutions	$	70,765	$	—	$	—	$	70,765
Money market accounts		3,247		—		—		3,247
	$	74,012	$	—	$	—	$	74,012
December 31, 2023
Cash accounts in banking institutions	$	91,717	$	—	$	—	$	91,717
Money market accounts		268		—		—		268
	$	91,985	$	—	$	—	$	91,985

Short-term Investments

The following table provides details regarding the Company’s portfolio of short-term investments (in thousands):

	Amortized		Unrealized					Aggregate Fair
Short-term Investments Classification	Cost		Gains		(Losses)			Market Value
March 31, 2024
Corporate bonds	$	796	$	1	$	(1	)	$	796
U.S. Government bonds		465,377		10		(979	)		464,408
Marketable securities		89		—		—			89
	$	466,262	$	11	$	(980	)	$	465,293
December 31, 2023
Corporate bonds	$	1,763	$	1	$	(5	)	$	1,759
U.S. Government bonds		420,769		303		(694	)		420,378
	$	422,532	$	304	$	(699	)	$	422,137

Long-term U.S. Government Bond Investments

The following table provides details regarding the Company’s portfolio of long-term investments (in thousands):

	Amortized		Unrealized					Aggregate Fair
Long-term Investments Classification	Cost		Gains		(Losses)			Market Value
March 31, 2024
U.S. Government bonds	$	299,537	$	68	$	(712	)	$	298,893
	$	299,537	$	68	$	(712	)	$	298,893
December 31, 2023
U.S. Government bonds	$	284,053	$	1,457	$	(8	)	$	285,502
	$	284,053	$	1,457	$	(8	)	$	285,502

Minority Equity Investments

The Company’s portfolio of minority equity investments consists of investments in privately held early-stage companies primarily motivated for the Company to gain early access to new technology and are passive in nature in that the Company typically does not seek to obtain representation on the boards of directors of the companies in which it invests. Minority equity investments are included in investments on the Consolidated Balance Sheets. As of March 31, 2024 and December 31, 2023, the Company had minority equity investments in five entities with a total carrying value of $14.0 million accounted for as equity securities without readily determinable fair values.

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FAIR VALUE MEASUREMENTS

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

4. FAIR VALUE MEASUREMENTS:

The following table provides the assets and liabilities carried at fair value measured on a recurring basis as of March 31, 2024 (in thousands):

			Fair Value Measurements, Using
	Total Carrying Value as of March 31, 2024		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Short-term U.S. Government bonds	$	464,408	$	464,408	$	—	$	—
Long-term U.S. Government bonds		298,893		298,893		—		—
Cash equivalents		3,247		3,247		—		—
Short-term Corporate bonds		796		796		—		—
Short-term Marketable securities		89		89		—		—

The following table provides the assets and liabilities carried at fair value measured on a recurring basis as of December 31, 2023 (in thousands):

			Fair Value Measurements, Using
	Total Carrying Value as of December 31, 2023		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Short-term U.S. Government bonds	$	420,378	$	420,378	$	—	$	—
Long-term U.S. Government bonds		285,502		285,502		—		—
Short-term Corporate bonds		1,759		1,759		—		—
Cash equivalents		268		268		—		—

Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level 3 inputs are unobservable inputs based on management’s own assumptions used to measure assets and liabilities at fair value. A financial asset’s or liability’s classification is determined based on the lowest level input that is significant to the fair value measurement.

Changes in fair value of the debt investments are recorded as unrealized gains and losses in accumulated other comprehensive loss on the Consolidated Balance Sheets and any credit losses on debt investments are recorded as an allowance for credit losses with an offset recognized in other loss, net on the Consolidated Statements of Income. There were no credit losses on debt investments as of March 31, 2024 or December 31, 2023.

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INVENTORY

3 Months Ended

Mar. 31, 2024

Inventory Disclosure [Abstract]

INVENTORY

5. INVENTORY:

Inventory consisted of the following (in thousands):

	March 31, 2024		December 31, 2023
Raw materials	$	108,681	$	113,400
Work-in-process		13,605		9,433
Finished goods		50,619		52,962
Inventory	$	172,905	$	175,795

The Company recorded an increase in its inventory reserves of none and $3.3 million for the three months ended March 31, 2024 and 2023, respectively, due to excess inventory levels in certain products.

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PROPERTY AND EQUIPMENT

3 Months Ended

Mar. 31, 2024

Property, Plant and Equipment [Abstract]

PROPERTY AND EQUIPMENT

6. PROPERTY AND EQUIPMENT:

Property and equipment, net consist of the following (in thousands):

	March 31, 2024			December 31, 2023
Land	$	12,230		$	12,230
Building and improvements		117,505			116,903
Office and lab equipment		150,079			148,465
Furniture, fixtures and computer related assets		18,759			18,970
Construction-in-progress		26,385			22,490
		324,958			319,058
Less: Accumulated depreciation		(149,062	)		(143,908	)
Property and equipment, net	$	175,896		$	175,150

Depreciation expense was $6.6 million and $6.5 million for the three months ended March 31, 2024 and 2023, respectively.

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GOODWILL AND INTANGIBLE ASSETS

3 Months Ended

Mar. 31, 2024

Finite-Lived Intangible Assets, Net [Abstract]

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS:

The Company monitors the recoverability of goodwill annually or whenever events or changes in circumstances indicate the carrying value may not be recoverable. Purchased intangible assets subject to amortization consist of acquired technology and other intangible assets that include trade names, customer relationships and developed intellectual property (IP) processes.

Acquired Technology

Acquired technology primarily consists of acquired license rights for patents and know-how obtained from Merck KGaA, BASF and Fujifilm. These intangible assets consist of the following (in thousands):

	March 31, 2024			December 31, 2023
Merck KGaA	$	66,012		$	66,012
BASF		95,989			95,989
Fujifilm		109,462			109,462
Other		5,712			5,712
		277,175			277,175
Less: Accumulated amortization		(191,043	)		(186,850	)
Acquired technology, net	$	86,132		$	90,325

Amortization expense related to acquired technology was $4.2 million and $2.5 million for the three months ended March 31, 2024 and 2023, respectively. Amortization expense is included in the amortization of acquired technology and other intangible assets expense line item on the Consolidated Statements of Income and is expected to be $12.6 million for the nine months ending December 31, 2024, $16.8 million for the year ending December 31, 2025, $12.0 million in the year ending December 31, 2026, $7.2 million in each of the years ending December 31, 2027 and 2028, and $30.3 million thereafter.

Merck KGaA Patent Acquisition

In April 2023, UDC Ireland entered into a Patent Sale and License Agreement with Merck KGaA. Under this agreement, Merck KGaA sold to UDC Ireland all of its rights, title and interest to over 550 of its owned and licensed OLED-related patents and patent applications in exchange for a cash payment of $66.0 million. The Patent Sale and License Agreement contains customary representations, warranties and covenants of the parties. UDC Ireland recorded the payment of $66.0 million as acquired technology, which is being amortized over a period of 10 years.

BASF Patent Acquisition

On June 28, 2016, UDC Ireland entered into and consummated an IP Transfer Agreement with BASF. Under the IP Transfer Agreement, BASF sold to UDC Ireland all of its rights, title and interest to certain of its owned and co-owned intellectual property rights relating to the composition, development, manufacture and use of OLED materials, including OLED lighting and display stack technology, as well as certain tangible assets. The intellectual property includes knowhow and more than 500 issued and pending patents in the area of phosphorescent materials and technologies. These assets were acquired in exchange for a cash payment of €86.8 million ($95.8 million). In addition, UDC Ireland also took on certain rights and obligations under three joint research and development agreements to which BASF was a party. The IP Transfer Agreement also contains customary representations, warranties and covenants of the parties. UDC Ireland recorded the payment of €86.8 million ($95.8 million) and acquisition costs incurred of $217,000 as acquired technology, which is being amortized over a period of 10 years.

Fujifilm Patent Acquisition

On July 23, 2012, the Company entered into a Patent Sale Agreement with Fujifilm. Under the agreement, Fujifilm sold more than 1,200 OLED-related patents and patent applications in exchange for a cash payment of $105.0 million, plus $4.5 million in costs incurred in connection with the purchase. The agreement contains customary representations and warranties and covenants, including respective covenants not to sue by both parties thereto. The agreement permitted the Company to assign all of its rights and obligations under the agreement to its affiliates, and the Company assigned, prior to the consummation of the transactions contemplated by the agreement, its rights and obligations to UDC Ireland. The transactions contemplated by the agreement were consummated on July 26, 2012. The Company recorded the $105.0 million plus $4.5 million of purchase costs as acquired technology, which was amortized over a period of 10 years that ended in July 2022.

Other Intangible Assets

As a result of the Adesis acquisition in June 2016, the Company recorded $16.8 million of other intangible assets, including $10.5 million assigned to customer relationships with a weighted average life of 11.5 years, $4.8 million to internally developed IP, processes and recipes with a weighted average life of 15 years, and $1.5 million to trade name and trademarks with a weighted average life of 10 years.

At March 31, 2024, these other intangible assets consist of the following (in thousands):

	March 31, 2024
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer relationships	$	10,520	$	(7,029	)	$	3,491
Developed IP, processes and recipes		4,820		(2,468	)		2,352
Trade name/Trademarks		1,500		(1,155	)		345
Other		448		(117	)		331
Total identifiable other intangible assets	$	17,288	$	(10,769	)	$	6,519

Amortization expense related to other intangible assets was $356,000 and $352,000 for the three months ended March 31, 2024 and 2023, respectively. Amortization expense is included in the amortization of acquired technology and other intangible assets expense line item on the Consolidated Statements of Income and is expected to be $1.0 million for the nine months ending December 31, 2024, $1.4 million in each of the years ending December 31, 2025 and 2026, $1.3 million for the year ending December 31, 2027, $422,000 for the year ending December 31, 2028, and $1.0 million in total thereafter.

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OTHER ASSETS

3 Months Ended

Mar. 31, 2024

Prepaid Expense and Other Assets [Abstract]

OTHER ASSETS

8. OTHER ASSETS:

Other assets consist of the following (in thousands):

	March 31, 2024		December 31, 2023
Long-term taxes receivable	$	57,808	$	60,146
Right-of-use assets		23,998		24,910
Long-term unbilled receivables		10,278		9,074
Long-term contract assets		8,688		9,278
Other long-term assets		1,610		1,881
Other assets	$	102,382	$	105,289

See Notes 9 and 20 for further explanation on right-of-use assets and non-current taxes receivable, respectively.

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LEASES

3 Months Ended

Mar. 31, 2024

Leases [Abstract]

LEASES

9. LEASES:

The Company has entered into operating leases to facilitate the expansion of its manufacturing, research and development, and selling, general and administrative activities. For purposes of calculating operating lease liabilities, lease terms may be deemed to include options to extend or terminate the lease when those events are reasonably certain to occur. The interest rate implicit in lease contracts is typically not readily determinable and as such the Company uses the appropriate incremental borrowing rate based on information available at the lease commencement date in determining the present value of the lease payments. Current lease agreements do not contain any residual value guarantees or material restrictive covenants. As of March 31, 2024, the Company did not have any finance leases and no additional operating leases that have not yet commenced.

The following table presents the Company’s operating lease cost and supplemental cash flow information related to the Company’s operating leases (in thousands):

	Three Months Ended March 31,
	2024		2023
Operating lease cost	$	1,103	$	1,221
Non-cash activity:
Right-of-use assets obtained in exchange for lease obligations	$	—	$	—

The following table presents the Company’s operating lease right-of-use assets and liabilities (in thousands):

	March 31, 2024		December 31, 2023
Right-of-use assets	$	23,998	$	24,910
Short-term lease liabilities		3,582		3,533
Long-term lease liabilities		21,945		22,855

The following table presents weighted average assumptions used to compute the Company’s right-of-use assets and lease liabilities:

	March 31, 2024
Weighted average remaining lease term (in years)		6.5
Weighted average discount rate		3.7	%

As of March 31, 2024, current operating leases had remaining terms between three and eight years with options to extend the lease terms.

Undiscounted future minimum lease payments as of March 31, 2024, by year and in the aggregate, having non-cancelable lease terms in excess of one year were as follows (in thousands):

	Maturities of Operating Lease Liabilities
2024 (1)	$	3,210
2025		4,315
2026		4,395
2027		4,317
2028		4,026
Thereafter		8,052
Total lease payments		28,315
Less: Imputed interest		(2,788	)
Present value of lease payments	$	25,527

(1)Scheduled maturities of lease liabilities represent the period from April 1, 2024 to December 31, 2024.

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ACCRUED EXPENSES

3 Months Ended

Mar. 31, 2024

Payables and Accruals [Abstract]

Schedule Of Accrued expenses

ACCRUED EXPENSES:

Accrued expenses consist of the following (in thousands):

	March 31, 2024		December 31, 2023
PPG Industries, Inc. agreement	$	14,620	$	11,962
Compensation		14,174		29,456
Royalties		2,225		647
Consulting		2,116		2,121
Professional fees		1,258		1,124
Research and development agreements		687		822
Other		7,019		5,948
Accrued expenses	$	42,099	$	52,080

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RESEARCH AND LICENSE AGREEMENTS WITH ACADEMIC PARTNERS

3 Months Ended

Mar. 31, 2024

Research and Development [Abstract]

RESEARCH AND LICENSE AGREEMENTS WITH ACADEMIC PARTNERS

11. RESEARCH AND LICENSE AGREEMENTS WITH ACADEMIC PARTNERS:

The Company has long-standing relationships with a number of academic institutions that undertake funded research projects, including Princeton University (Princeton) and the University of Southern California (USC).

Under the current license agreement among the Company, Princeton and USC, the universities have granted the Company worldwide, exclusive license rights, with rights to sublicense, to make, have made, use, lease and/or sell products and to practice processes based on patent applications and issued patents arising out of research performed by the universities for the Company. The Company recorded royalty expense in connection with this agreement of $1.6 million and $159,000 for the three months ended March 31, 2024 and 2023, respectively.

The Company also makes payments under the current research agreement with USC on a quarterly basis as actual expenses are incurred. As of March 31, 2024, the Company was obligated to pay USC up to $1.7 million for work to be performed during the remaining term. The Company recorded research and development expense in connection with work performed under the agreement of $267,000 and $282,000 for the three months ended March 31, 2024 and 2023, respectively.

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OTHER LIABILITIES

3 Months Ended

Mar. 31, 2024

Other Liabilities [Abstract]

OTHER LIABILITIES

12. OTHER LIABILITIES:

Other liabilities consist of the following (in thousands):

	March 31, 2024		December 31, 2023
Long-term lease liabilities	$	21,945	$	22,855
Long-term taxes payable		15,749		15,749
Other long-term liabilities		282		54
Other liabilities	$	37,976	$	38,658

See Notes 9 and 20 for further explanation on long-term lease liabilities and long-term taxes payable, respectively.

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EQUITY AND CASH COMPENSATION UNDER THE PPG AGREEMENTS

3 Months Ended

Mar. 31, 2023

Long-Term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]

EQUITY AND CASH COMPENSATION UNDER THE PPG AGREEMENTS

13. EQUITY AND CASH COMPENSATION UNDER THE PPG AGREEMENT:

On September 22, 2011, the Company entered into an Amended and Restated OLED Materials Supply and Service Agreement with PPG (the New OLED Materials Agreement), which, effective as of October 1, 2011, replaced the original OLED Materials Agreement with PPG. The term of the New OLED Materials Agreement, by amendment in February 2021, runs through December 31, 2024, and thereafter is automatically renewed for additional one-year terms, unless terminated by the Company by providing prior notice of one year or terminated by PPG by providing prior notice of two years. The New OLED Materials Agreement contains provisions that are substantially similar to those of the original OLED Materials Agreement. Under the New OLED Materials Agreement, PPG continues to assist the Company in developing its proprietary OLED materials and supplying the Company with those materials for evaluation purposes and for resale to its customers.

Under the New OLED Materials Agreement, the Company compensates PPG on a cost-plus basis for the services provided during each calendar quarter. The Company is required to pay for some of these services in all cash. Up to 50% of the remaining services are payable, at the Company’s sole discretion, in cash or shares of the Company’s common stock, with the balance payable in cash. The actual number of shares of common stock issuable to PPG is determined based on the average closing price for the Company’s common stock during a specified number of days prior to the end of each calendar half-year period ending on March 31 and September 30. If, however, this average closing price is less than $20.00, the Company is required to compensate PPG in cash. No shares have been issued for services rendered by PPG since the inception of the contract.

The Company is also required to reimburse PPG for raw materials used for research and development. The Company records the purchases of these raw materials as a current asset until such materials are used for research and development efforts.

In February 2021, the Company entered into an amendment to the New OLED Materials Agreement extending the term of the agreement and specifying operation and maintenance services to be provided by PPG affiliate, PPG SCM Ireland Limited (PPG SCM), to UDC Ireland, at the Company’s manufacturing site in Shannon, Ireland that UDC Ireland’s wholly-owned subsidiary, OLED Material Manufacturing Limited (OMM), began leasing at such time for the production of OLED materials. OMM purchased the site in September 2023 and the Company amended and restated the February 2021 amendment to reflect OMM’s ownership and PPG SCM’s updated operation and maintenance services after such purchase. Facility improvements have been completed and operations commenced in June 2022. As with the initial New OLED Materials Agreement, the Company compensates PPG on a cost-plus basis for the services provided at the Shannon manufacturing facility.

The Company recorded research and development expense of $4.5 million and $2.0 million for the three months ended March 31, 2024 and 2023, respectively, in relation to the cash portion of the reimbursement of expenses and work performed by PPG, excluding amounts paid for commercial chemicals.

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SHAREHOLDERS' EQUITY

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

SHAREHOLDERS' EQUITY

14. SHAREHOLDERS’ EQUITY:

Preferred Stock

The Company’s Amended and Restated Articles of Incorporation authorize it to issue up to 5,000,000 shares of $0.01 par value preferred stock with designations, rights and preferences determined from time-to-time by the Company’s Board of Directors.

Accordingly, the Company’s Board of Directors is empowered, without shareholder approval, to issue preferred stock with dividend, liquidation, conversion, voting or other rights superior to those of shareholders of the Company’s common stock.

In 1995, the Company issued 200,000 shares of Series A Nonconvertible Preferred Stock (Series A) to American Biomimetics Corporation (ABC) pursuant to a certain Technology Transfer Agreement between the Company and ABC. The Series A shares have a liquidation value of $7.50 per share. Series A shareholders, as a single class, have the right to elect two members of the Company’s Board of Directors. This right has never been exercised. Holders of the Series A shares are entitled to one vote per share on matters which shareholders are generally entitled to vote. The Series A shareholders are not entitled to any dividends.

As of March 31, 2024, the Company had issued 200,000 shares of preferred stock, all of which were outstanding.

Common Stock

The Company’s Amended and Restated Articles of Incorporation authorize it to issue up to 200,000,000 shares of $0.01 par value common stock. Each share of the Company’s common stock entitles the holder to one vote on all matters to be voted upon by the shareholders.

As of March 31, 2024, the Company had issued 48,804,964 shares of common stock, of which 47,439,316 were outstanding. During the three months ended March 31, 2024 and 2023, the Company repurchased no shares of common stock.

Dividends

During the three months ended March 31, 2024, the Company declared and paid cash dividends of $0.40 per common share, or $19.5 million, on the Company’s outstanding common stock.

On April 30, 2024, the Company’s Board of Directors declared a second quarter dividend of $0.40 per share to be paid on June 28, 2024 to all shareholders of record of the Company’s common stock as of the close of business on June 14, 2024. All future dividends will be subject to the approval of the Company’s Board of Directors.

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ACCUMULATED OTHER COMPREHENSIVE LOSS

3 Months Ended

Mar. 31, 2024

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

ACCUMULATED OTHER COMPREHENSIVE LOSS

ACCUMULATED OTHER COMPREHENSIVE LOSS:

Amounts related to the changes in accumulated other comprehensive loss were as follows (in thousands):

	Unrealized Gain (Loss) on Available-for-Sale Securities			Net Unrealized Gain (Loss) on Retirement Plan (2)			Change in Cumulative Foreign Currency Translation Adjustment			Total			Affected Line Items in the Consolidated Statements of Income
Balance December 31, 2023, net of tax	$	858		$	(1,808	)	$	(136	)	$	(1,086	)
Other comprehensive (loss) gain    before reclassification		(2,666	)		—			(50	)		(2,716	)
Reclassification to net income (1)		—			8			—			8		Selling, general and administrative, research and development and cost of sales
Change during period		(2,666	)		8			(50	)		(2,708	)
Balance March 31, 2024, net of tax	$	(1,808	)	$	(1,800	)	$	(186	)	$	(3,794	)

	Unrealized Gain (Loss) on Available-for-Sale Securities			Net Unrealized Gain (Loss) on Retirement Plan (2)			Change in Cumulative Foreign Currency Translation Adjustment			Total			Affected Line Items in the Consolidated Statements of Income
Balance December 31, 2022, net of tax	$	(7,887	)	$	(10,011	)	$	(554	)	$	(18,452	)
Other comprehensive gain    before reclassification		2,627			—			95			2,722
Reclassification to net income (1)		—			253			—			253		Selling, general and administrative, research and development and cost of sales
Change during period		2,627			253			95			2,975
Balance March 31, 2023, net of tax	$	(5,260	)	$	(9,758	)	$	(459	)	$	(15,477	)

(1)The Company reclassified amortization of prior service cost and actuarial loss for its retirement plan from accumulated other comprehensive loss to net income of $8,000 and $253,000 for the three months ended March 31, 2024 and 2023, respectively.

(2)Refer to Note 17: Retirement Plan Benefit Liability.

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STOCK-BASED COMPENSATION

3 Months Ended

Mar. 31, 2024

Share-Based Payment Arrangement [Abstract]

STOCK-BASED COMPENSATION

16. STOCK-BASED COMPENSATION:

Equity Compensation Plan

On June 15, 2023, the shareholders of the Company voted to approve the Universal Display Corporation 2023 Equity Compensation Plan (the “Equity Compensation Plan”), which replaced the Universal Display Corporation 2014 Equity Compensation Plan. The Equity Compensation Plan provides for the granting of incentive and nonqualified stock options, shares of common stock, stock appreciation rights and performance units to employees, directors and consultants of the Company. Stock options are exercisable over periods determined by the Company’s Human Capital Committee, but for no longer than 10 years from the grant date. The total number of shares that may be subject to awards under the Equity Compensation Plan is equal to the shares that were available for issuance and not subject to an award under the 2014 Equity Compensation Plan at the time it was replaced by the Equity Compensation Plan, subject to adjustment with respect to shares underlying any outstanding award granted under the Equity Compensation Plan or the 2014 Equity Compensation Plan that may expire, or be terminated, surrendered or forfeited for any reason, without issuance of such shares. As of March 31, 2024, there were 1,347,660 shares that remained available to be granted under the Equity Compensation Plan. The Equity Compensation Plan will terminate on June 15, 2033.

Restricted Stock Awards and Units

The Company has issued restricted stock awards and units to employees and non-employees with vesting terms of one to five years. The fair value is equal to the market price of the Company’s common stock on the date of grant for awards granted to employees. Consistent with the accounting for equity-classified awards issued to employees, our equity-classified nonemployee share-based awards are measured at the grant date fair value. Expense for restricted stock awards and units is amortized ratably over the vesting period for the awards issued to employees and using a graded vesting method for the awards issued to non-employees.

During the three months ended March 31, 2024, the Company granted 84,089 shares of restricted stock awards and restricted stock units to employees and non-employees, which had a total fair value of $13.8 million on the respective dates of grant, and will vest over three to five years from the date of grant, provided that the grantee is still an employee of the Company or is still providing services to the Company on the applicable vesting date.

For the three months ended March 31, 2024 and 2023, the Company recorded, as compensation charges related to all restricted stock awards and units granted to employees and non-employees, selling, general and administrative expense of $2.2 million and $3.1 million, respectively, research and development expense of $1.4 million and $1.5 million, respectively, and cost of sales of $436,000 and $531,000, respectively.

In connection with the vesting of restricted stock awards and units during the three months ended March 31, 2024 and 2023, 31,669 and 46,353 shares, respectively, with aggregate fair values of $5.6 million and $6.4 million, respectively, were withheld in satisfaction of tax withholding obligations and are reflected as a financing activity within the Consolidated Statements of Cash Flows.

For the three months ended March 31, 2024 and 2023, the Company recorded as compensation charges related to all restricted stock units granted to non-employee members of the Scientific Advisory Board, whose unvested shares are marked to market each reporting period, research and development expense of $62,000 and $68,000, respectively.

The Company has granted restricted stock units to non-employee members of the Board of Directors with quarterly vesting over a period of approximately one year. The fair value is equal to the market price of the Company's common stock on the date of grant. The restricted stock units are issued and expense is recognized ratably over the vesting period. For the three months ended March 31, 2024 and 2023, the Company recorded compensation charges for services performed, related to all restricted stock units granted to non-employee members of the Board of Directors, selling, general and administrative expense of $395,000 and $355,000, respectively. In connection with the vesting of the restricted stock, the Company issued to non-employee members of the Board of Directors 2,392 and 3,104 shares, respectively, during the three months ended March 31, 2024 and 2023.

Performance Unit Awards

Each performance unit award is subject to both a performance-vesting requirement (either performance-based or market-based) and a service-vesting requirement. The performance-based vesting requirement is tied to EBITDA and cash flow achievement, as measured over a specific performance period. The market-based vesting requirement is tied to the Company's total shareholder return (TSR) relative to the TSR of companies comprising the Nasdaq Electronics Components Index, as measured over a three-year performance period. The maximum number of performance units that may vest based on performance is three times the shares granted. Further, if the Company's performance falls below certain thresholds, the performance units will not vest at all.

During the three months ended March 31, 2024, the Company granted 69,600 performance units, of which 34,798 units are subject to performance-based vesting requirements based on three-year cumulative adjusted EBITDA, 17,401 units are subject to performance-based vesting requirements based on three-year cumulative gross margin and 17,401 units are subject to market-based, TSR vesting requirements. The grant date fair value of the performance unit awards granted was $11.4 million for the three months ended March 31, 2024, as determined by the Company’s common stock on date of grant for the units with performance-based vesting and a Monte Carlo simulation model used for the units with market-based vesting.

For the three months ended March 31, 2024 and 2023, the Company recorded selling, general and administrative expense of $2.5 million and reduction in expense of $890,000, respectively, research and development expense of $1.2 million and reduction in expense of $231,000, respectively, and cost of sales expense of $748,000 and reduction in expense of $143,000, respectively, related to the performance units. The reduction of expense was primarily due to current expectations of future vesting as they relate to Company performance.

In connection with the vesting of performance units during the three months ended March 31, 2024 and 2023, 8,160 and 5,350 shares, respectively, with an aggregate fair value of $1.4 million and $750,000, respectively, were withheld in satisfaction of tax withholding obligations and are reflected as a financing activity within the Consolidated Statements of Cash Flows.

Employee Stock Purchase Plan

On April 7, 2009, the Board of Directors of the Company adopted an Employee Stock Purchase Plan (ESPP). The ESPP was approved by the Company’s shareholders and became effective on June 25, 2009. The Company has reserved 1,000,000 shares of common stock for issuance under the ESPP. Unless terminated by the Board of Directors, the ESPP will expire when all reserved shares have been issued.

Eligible employees may elect to contribute to the ESPP through payroll deductions during consecutive three-month purchase periods, the first of which began on July 1, 2009. Each employee who elects to participate will be deemed to have been granted an option to purchase shares of the Company’s common stock on the first day of the purchase period. Unless the employee opts out during the purchase period, the option will automatically be exercised on the last day of the period, which is the purchase date, based on the employee’s accumulated contributions to the ESPP. The purchase price will equal 85% of the lesser of the closing price per share of common stock on the first business day of the period or the last business day of the period.

Employees may allocate up to 10% of their base compensation to purchase shares of common stock under the ESPP; however, each employee may purchase no more than 12,500 shares on a given purchase date, and no employee may purchase more than $25,000 of common stock under the ESPP during a given calendar year.

During the three months ended March 31, 2024 and 2023, the Company issued 4,463 and 5,639 shares, respectively, of its common stock under the ESPP, resulting in proceeds of $639,000 and $518,000, respectively.

For the three months ended March 31, 2024 and 2023, the Company recorded charges of $37,000 and $40,000, respectively, to selling, general and administrative expense, $76,000 and $71,000, respectively, to research and development expense, and $51,000 and $41,000, respectively, to cost of sales related to the ESPP equal to the amount of the discount and the value of the look-back feature.

Scientific Advisory Board Awards

During the three months ended March 31, 2024 and 2023, the Company granted a total of 1,616 and 2,366 shares, respectively, of fully vested common stock to non-employee members of the Scientific Advisory Board for services performed in 2023 and 2022, respectively. The fair value of shares issued to members of the Scientific Advisory Board was $300,000 for both three-month periods.

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RETIREMENT PLAN BENEFIT LIABILITY

3 Months Ended

Mar. 31, 2024

Retirement Benefits [Abstract]

RETIREMENT PLAN BENEFIT LIABILITY

RETIREMENT PLAN BENEFIT LIABILITY:

On March 18, 2010, the Human Capital Committee and the Board of Directors of the Company approved and adopted the Universal Display Corporation Supplemental Executive Retirement Plan (SERP). The SERP is currently unfunded and includes salary and bonus as part of the plan. The purpose of the SERP is to provide certain of the Company’s key employees with supplemental pension benefits following a cessation of their employment and to encourage their continued employment with the Company. As of March 31, 2024, there were eight participants in the SERP. In December 2022, one of the participants retired and monthly SERP benefit payments commenced in January 2023. The total SERP benefit payments for the three months ended March 31, 2024 were $504,000.

The Company records amounts relating to the SERP based on calculations that incorporate various actuarial and other assumptions, including discount rates, rate of compensation increases, retirement dates and life expectancies. The net periodic costs are recognized as employees render the services necessary to earn the SERP benefits.

The components of net periodic pension cost were as follows (in thousands):

	Three Months Ended March 31,
	2024		2023
Service cost	$	212	$	238
Interest cost		610		724
Amortization of prior service cost		11		204
Amortization of loss		—		120
Total net periodic benefit cost	$	833	$	1,286

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COMMITMENTS AND CONTINGENCIES

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

18. COMMITMENTS AND CONTINGENCIES:

Commitments

Under the current research agreement with USC, the Company is obligated to make certain payments to USC based on work performed by it under that agreement, and by the University of Michigan (Michigan) under a subcontractor agreement that Michigan has with USC.

Under the terms of the current license agreement among the Company, Princeton and USC, the Company makes royalty payments to Princeton. See Note 11 for further explanation.

The Company has agreements with five executive officers and 11 senior level employees which provide for certain cash and other benefits upon termination of employment of the officer or employee in connection with a change in control of the Company. If a covered person’s employment is terminated in connection with the change in control, the person is entitled to a lump-sum cash payment equal to two times (in the case of the executive officers) or either one or two times (in the case of the senior level employees) the sum of the average annual base salary and bonus of the person and immediate vesting of all stock options and other equity awards that may be outstanding at the date of the change in control, among other items.

In order to manage manufacturing lead times and help ensure adequate material supply, the Company entered into the New OLED Materials Agreement (see Note 13) that allows PPG to procure and produce inventory based upon criteria as defined by the Company. These purchase commitments consist of firm, noncancelable and unconditional commitments. In certain instances, this agreement allows the Company the option to reschedule and adjust the Company’s requirements based on its business needs prior to firm orders being placed. As of March 31, 2024 and December 31, 2023, the Company had purchase commitments for inventory of $29.7 million and $29.8 million, respectively.

Patent Related Challenges and Oppositions

Each major jurisdiction in the world that issues patents provides both third parties and applicants an opportunity to seek a further review of an issued patent. The process for requesting and considering such reviews is specific to the jurisdiction that issued the patent in question, and generally does not provide for claims of monetary damages or a review of specific claims of infringement. The conclusions made by the reviewing administrative bodies tend to be appealable and generally are limited in scope and applicability to the specific claims and jurisdiction in question.

The Company believes that opposition proceedings are frequently commenced in the ordinary course of business by third parties who may believe that one or more claims in a patent do not comply with the technical or legal requirements of the specific jurisdiction in which the patent was issued. The Company views these proceedings as reflective of its goal of obtaining the broadest legally permissible patent coverage permitted in each jurisdiction. Once a proceeding is initiated, as a general matter, the issued patent continues

to be presumed valid until the jurisdiction’s applicable administrative body issues a final non-appealable decision. Depending on the jurisdiction, the outcome of these proceedings could include affirmation, denial or modification of some or all of the originally issued claims. The Company believes that as OLED technology becomes more established and its patent portfolio increases in size, so will the number of these proceedings.

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CONCENTRATION OF RISK

3 Months Ended

Mar. 31, 2024

Risks and Uncertainties [Abstract]

CONCENTRATION OF RISK

19. CONCENTRATION OF RISK:

Revenues and accounts receivable from the Company's largest customers were as follows (in thousands):

	% of Total Revenue for the  Three Months Ended March 31,		Accounts Receivable as of
Customer	2024	2023	March 31, 2024
A	41%	30%	$	40,021
B	25%	26%	$	40,165
C	16%	21%	$	15,289

Revenues from outside of North America represented approximately 98% and 97% of consolidated revenue for the three months ended March 31, 2024 and 2023, respectively. Revenues by geographic area are as follows (in thousands):

	Three Months Ended March 31,
Country	2024		2023
South Korea	$	102,398	$	66,060
China		57,470		57,427
Japan		1,254		1,647
Other non-U.S. locations		1,665		1,337
Total non-U.S. locations		162,787		126,471
United States		2,472		3,996
Total revenue	$	165,259	$	130,467

The Company attributes revenue to different geographic areas on the basis of the location of the customer.

Property and equipment, net by geographic area are as follows (in thousands):

	March 31, 2024		December 31, 2023
United States	$	117,389	$	118,250
Ireland		43,703		42,203
Other		14,804		14,697
Total property and equipment, net	$	175,896	$	175,150

Substantially all chemical materials were purchased from one supplier. See Note 13 for further explanation.

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INCOME TAXES

3 Months Ended

Mar. 31, 2024

Income Tax Disclosure [Abstract]

INCOME TAXES

20. INCOME TAXES:

The Company is subject to income taxes in both the United States and foreign jurisdictions. The effective income tax rate was 19.4% and 22.8% for the three months ended March 31, 2024 and 2023, respectively. The Company recorded an income tax expense of $13.6 million and $11.8 million for the three months ended March 31, 2024 and 2023, respectively. The discrepancy between the statutory tax rate and the effective tax rate is primarily due to nondeductible employee compensation and U.S. international tax (GILTI and Subpart F) partially offset by the benefit of income taxed in foreign jurisdictions. The effective income tax rate decreased due to a change in U.S. tax regulations associated with the ability to credit Chinese withholding taxes, as well as a change in the capitalization rules for research and development expenses.

In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent on the Company's ability to generate future taxable income to obtain benefit from the reversal of temporary differences, net operating loss carryforwards and tax credits. As part of its assessment, management considers the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies. At this time there is not sufficient evidence to release the valuation allowance that has been recorded for the New Jersey research and development credits and unrealized loss on investments. There are no indicators against the realizability of the remaining net deferred tax asset.

On December 27, 2018, the Korean Supreme Court, citing prior cases, held that only royalties paid with respect to Korean registered patents are considered Korean source income and subject to Korean withholding tax under the applicable law and interpretation of the Korea-U.S. Tax Treaty. The Company has incurred Korean withholding tax of $14.9 million for each of the years ended December 31, 2018, through December 31, 2022. Based on the Korean Supreme Court decision, a tax refund request on behalf of the Company was filed with the Korean National Tax Service (KNTS) for the entire period from January 1, 2018, to December 31, 2022. The Company received a formal rejection from the KNTS; and in May 2022 filed an appeal with the Korean Tax Tribunal. On December 18th, 2023, the Company received a formal rejection from the Tax Tribunal. Anticipating the rejection of the appeal, in September 2023 the Company filed a petition to the District Court and is awaiting its decision. The Company has been advised by a prominent Korean law firm that there is a more-likely-than-not chance of success. As a result, the Company has recorded a long-term asset of $57.8 million and $60.1 million as of March 31, 2024, and December 31, 2023, respectively for the receipt of the Korean withholding tax. The Company also recorded foreign exchange loss of $2.3 million and $1.0 million for the three months ended March 31, 2024 and 2023 due to the fluctuation of the Korean Won to the U.S. Dollar and resulting remeasurement of this Won-denominated receivable. The Company will amend U.S. federal tax returns for the 2018 to 2022 years when the anticipated refund from KNTS is received to offset the additional tax liability. The Company has recorded a long-term liability of $15.7 million as of March 31, 2024, and December 31, 2023, for the estimated amounts due to the U.S. federal government based on the amendment of the Company's U.S. tax returns, indicating that lower withholding amounts were required.

The Company is not subject to examinations by the federal tax authority for the years prior to 2020. The Company's state and foreign tax returns are open for a period of generally three to four years. The Company is under California tax audit for 2019 and 2020 years, which is in the information-collecting stage.

The above estimates may change in the future and upon settlement.

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REVENUE RECOGNITION

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

REVENUE RECOGNITION

21. REVENUE RECOGNITION:

The Company recognizes revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers (Topic 606). The standard establishes the principles that an entity shall apply to report useful information to users of financial statements about the nature, amount, timing, and uncertainty of revenue and cash flows from a contract with a customer.

For the three months ended March 31, 2024 and 2023, the Company recorded 98% and 96%, respectively, of its revenue from OLED related sales and 2% and 4%, respectively, from the providing of services through Adesis.

Contract Balances

The following table provides information about assets and liabilities associated with our contracts from customers (in thousands):

	As of March 31, 2024
Accounts receivable	$	119,584
Short-term unbilled receivables		22,440
Long-term unbilled receivables		10,278
Short-term contract assets		2,747
Long-term contract assets		8,688
Short-term deferred revenue		19,157
Long-term deferred revenue		13,292

Short-term and long-term unbilled receivables and contract assets are classified as other current assets and other assets, respectively, on the Consolidated Balance Sheets. Contract assets represent consideration related to the renewal of customer contracts which is recognized over the contract term based on material units sold. The deferred revenue balance as of March 31, 2024 will be recognized as materials are shipped to customers over the remaining contract periods. As of March 31, 2024, the Company had $35.9 million of backlog associated with committed purchase orders from its customers for phosphorescent emitter material. These orders are anticipated to be fulfilled within the next 90 days.

Significant changes in the assets and liabilities balances associated with the Company's contracts from customers for the three months ended March 31, 2024 and 2023 are as follows (in thousands):

	Three Months Ended March 31, 2024
	Assets			Liabilities
Balance at December 31, 2023	$	42,134		$	(59,719	)
Revenue recognized that was previously included in deferred revenue, net		—			61,095
Increases due to cash received		—			(33,323	)
Cumulative catch-up adjustment arising from changes in estimates of    transaction price, net		—			(502	)
Unbilled receivables recorded, net		2,560			—
Contract assets recorded, net		(541	)		—
Net change		2,019			27,270
Balance at March 31, 2024	$	44,153		$	(32,449	)

	Three Months Ended March 31, 2023
	Assets			Liabilities
Balance at December 31, 2022	$	38,457		$	(63,878	)
Revenue recognized that was previously included in deferred revenue, net		—			41,086
Increases due to cash received		—			(38,153	)
Cumulative catch-up adjustment arising from changes in estimates of    transaction price, net		—			5,683
Unbilled receivables recorded, net		11,878			—
Contract assets recorded, net		(520	)		—
Transferred to receivables from unbilled receivables		(19,983	)		—
Net change		(8,625	)		8,616
Balance at March 31, 2023	$	29,832		$	(55,262	)

The cumulative catch-up adjustment recorded to revenue arising from changes in estimates of transaction price, net was a reduction of $502,000 for three months ended March 31, 2024 as compared to an increase of $5.7 million for the three months ended March 31, 2023. For the three months ended March 31, 2023, the adjustment resulted from an increase in the average price per gram that was primarily due to the decrease in anticipated demand by several of the Company's customers over the remaining lives of their contracts, resulting from changes in global macroeconomic factors.

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NET INCOME PER COMMON SHARE

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

NET INCOME PER COMMON SHARE

22. NET INCOME PER COMMON SHARE:

The Company computes earnings per share in accordance with ASC Topic 260, Earnings per Share, which requires earnings per share (EPS) for each class of stock to be calculated using the two-class method. The two-class method is an allocation of income between the holders of common stock and the Company's participating security holders. Under the two-class method, income for the reporting period is allocated between common shareholders and other security holders based on their respective participation rights in undistributed income. Unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents are participating securities and, therefore, are included in computing earnings per share pursuant to the two-class method.

Basic net income per common share is computed by dividing net income allocated to common shareholders by the weighted-average number of shares of common stock outstanding for the period excluding unvested restricted stock units and performance units. Net income allocated to the holders of the Company's unvested restricted stock awards is calculated based on the shareholders proportionate share of weighted average shares of common stock outstanding on an if-converted basis.

For purposes of determining diluted net income per common share, basic net income per share is further adjusted to include the effect of potential dilutive common shares outstanding, including restricted stock units, performance units and the impact of shares to be issued under the Company's Employee Stock Purchase Plan.

The following table is a reconciliation of net income and the shares used in calculating basic and diluted net income per common share for the three months ended March 31, 2024 and 2023 (in thousands, except share and per share data):

	Three Months Ended March 31,
	2024			2023
Numerator:
Net income	$	56,853		$	39,839
Adjustment for Basic EPS:
Earnings allocated to unvested shareholders		(201	)		(213	)
Adjusted net income	$	56,652		$	39,626
Denominator:
Weighted average common shares outstanding – Basic		47,557,959			47,523,593
Effect of dilutive shares:
Common stock equivalents arising from stock options and ESPP		462			940
Restricted stock awards and units and performance units		70,071			42,474
Weighted average common shares outstanding – Diluted		47,628,492			47,567,007
Net income per common share:
Basic	$	1.19		$	0.83
Diluted	$	1.19		$	0.83

For the three months ended March 31, 2024 and 2023, the combined effects of unvested restricted stock awards, restricted stock units, performance unit awards and stock options of 27,453 and 41,505, respectively, were excluded from the calculation of diluted EPS as their impact would have been antidilutive.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

3 Months Ended

Mar. 31, 2024

Accounting Policies [Abstract]

Interim Financial Information

Interim Financial Information

In the opinion of management, the accompanying unaudited Consolidated Financial Statements have been prepared in accordance with the requirements of the Securities and Exchange Commission for interim financial reporting and contain all adjustments (consisting of only normal recurring adjustments) necessary to present fairly the Company’s financial position as of March 31, 2024 and results of operations for the three months ended March 31, 2024 and 2023, and cash flows for the three months ended March 31, 2024 and 2023. While management believes that the disclosures presented are adequate to make the information not misleading, these unaudited Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the notes thereto in the Company’s latest year-end Consolidated Financial Statements, which are included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023. The results of the Company’s operations for any interim period are not necessarily indicative of the results of operations for any other interim period or for the full year.

Principles of Consolidation

Principles of Consolidation

The Consolidated Financial Statements include the accounts of Universal Display Corporation and its wholly owned subsidiaries, UDC, Inc., UDC Ireland Limited (UDC Ireland), Universal Display Corporation Hong Kong, Limited, Universal Display Corporation Korea, Y.H. (UDC Korea), Universal Display Corporation Japan GK, Universal Display Corporation China, Ltd., Adesis, Inc. (Adesis), UDC Ventures LLC, OVJP Corporation (OVJP Corp) and OLED Material Manufacturing Limited (OMM). All intercompany transactions and accounts have been eliminated.

Reclassification of Prior Year Presentation

Reclassification of Prior Year Presentation

Certain prior year adjustments to reconcile net income to net cash provided by operating activities have been reclassified on the Consolidated Statements of Cash Flows to conform to the current year presentation. Stock-based compensation activity has been consolidated and includes stock-based compensation to employees, Board of Directors, and Scientific Advisory Board.

Management's Use of Estimates

Management’s Use of Estimates

The preparation of financial statements in conformity with U.S. generally accepted accounting principles (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The estimates made are principally in the areas of revenue recognition including estimates of material unit sales and royalties, the useful life of acquired intangibles, lease liabilities, right-of-use assets, the use and recoverability of inventories, intangibles, investments and income taxes including realization of deferred tax assets, stock-based compensation and retirement benefit plan liabilities. Actual results could differ from those estimates.

Inventories

Inventories

Inventories consist of raw materials, work-in-process and finished goods, and are stated at the lower of cost, determined on a first-in, first-out basis, or net realizable value. Inventory valuation and firm committed purchase order assessments are performed on a quarterly basis and those items that are identified to be obsolete or in excess of forecasted usage are written down to their estimated realizable value. Estimates of realizable value are based upon management’s analyses and assumptions, including, but not limited to, forecasted sales levels by product, expected product lifecycle, product development plans and future demand requirements. A 12-month rolling forecast based on factors, including, but not limited to, production cycles, anticipated product orders, marketing forecasts, backlog, and shipment activities is used in the inventory analysis. If market conditions are less favorable than forecasts or actual demand from customers is lower than estimates, additional inventory write-downs may be required. If demand is higher than expected, inventories that had previously been written down may be sold.

Fair Value of Financial Instruments

Fair Value of Financial Instruments

The carrying values of accounts receivable, other current assets, accounts payable and other current liabilities approximate fair value in the accompanying Consolidated Financial Statements due to the short-term nature of those instruments. The Company’s other financial instruments, which include cash equivalents and investments (excluding minority equity investments) are carried at fair value.

Minority Equity Investments

Minority Equity Investments

The Company accounts for minority equity investments in companies that are not accounted for under the equity method as equity securities without readily determinable fair values. The value of these securities is based on original cost less impairments, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or similar investment in the same issuer. Under this method, the share of income or loss of such companies is not included in the Consolidated Statements of Income. The carrying value of these investments is included in investments on the Consolidated Balance Sheets.

The Company’s policy is to recognize an impairment in the value of its minority equity investments when evidence of an impairment exists. Factors considered in the assessment include a significant adverse change in the regulatory, economic, or technological environment, the completion of new equity financing that may indicate a decrease in value, the failure to complete new equity financing arrangements after seeking to raise additional funds, or the commencement of proceedings under which the assets of the business may be placed in receivership or liquidated to satisfy the claims of debt and equity stakeholders. The impairment in the value of minority equity investments is included in the other loss, net line item on the Consolidated Statements of Income.

Leases

Leases

The Company is a lessee in operating leases primarily incurred to facilitate manufacturing, research and development, and selling, general and administrative activities. At contract inception, the Company determines if an arrangement is or contains a lease, and if so recognizes a right-of-use asset and lease liability at the lease commencement date. For operating leases, the lease liability is measured at the present value of the unpaid lease payments at the lease commencement date, whereas for finance leases, the lease liability is initially measured at the present value of the unpaid lease payments and subsequently measured at amortized cost using the interest method. Operating lease right-of-use assets are included in other assets on the Consolidated Balance Sheets. The short-term portion of operating lease liabilities is included in other current liabilities on the Consolidated Balance Sheets and the long-term portion is included

in other liabilities on the Consolidated Balance Sheets. As of March 31, 2024, the Company had no leases that qualified as financing arrangements.

Key estimates and judgments include how the Company determines the discount rate used to discount the unpaid lease payments to present value and the lease term. The Company monitors for events or changes in circumstances that could potentially require recognizing an impairment loss.

Revenue Recognition and Deferred Revenue

Revenue Recognition and Deferred Revenue

Material sales relate to the Company’s sale of its OLED materials for incorporation into its customers’ commercial OLED products or for their OLED development and evaluation activities. Revenue associated with material sales is generally recognized at the time title passes, which is typically at the time of shipment or at the time of delivery, depending upon the contractual agreement between the parties. Revenue may be recognized after control of the material passes in the event the transaction price includes variable consideration. For example, a customer may be provided an extended opportunity to stock materials prior to use in mass production and given a general right of return not conditioned on breaches of warranties associated with the specific product. In such circumstances, revenue will be recognized at the earlier of the expiration of the customer’s general right of return or once it becomes unlikely that the customer will exercise its right of return.

The vast majority of revenue attributed to material sales is determined through technology license agreements and material supply agreements the terms of which are jointly agreed upon with the Company’s customers. The remaining revenue recognized is in the form of contract research services revenue earned by the Company’s subsidiary, Adesis, Inc., and the Company’s occasional material sales to smaller customers. None of the revenue recognized during the three months ended March 31, 2024 or 2023 resulted solely from royalty or license fee arrangements as to which there were not associated material sales.

The rights and benefits to the Company’s OLED technologies are conveyed to the customer through technology license agreements and material supply agreements. The Company believes that the licenses and materials sold under these combined agreements are not distinct from each other for financial reporting purposes and as such, they are accounted for as a single performance obligation. Accordingly, total contract consideration is estimated and recognized over the contract term based on material units sold at the estimated per unit fee over the life of the contract. Total contract consideration is allocated to material sales and royalty and licensing fees on the Consolidated Statements of Income based on contract pricing.

Various estimates are relied upon to recognize revenue. The Company estimates total material units to be purchased by its customers over the contract term based on historical trends, industry estimates and its forecast process. Management uses the expected value method to estimate the material per unit fee. Additionally, management estimates the sales-based portion of royalty revenue based on the estimated net sales revenue of its customers over the contract term.

Contract research services revenue is revenue earned by Adesis by providing chemical materials synthesis research, development and commercialization for non-OLED applications on a contractual basis. These services range from intermediates for structure-activity relationship studies, reference agents and building blocks for combinatorial synthesis, re-synthesis of key intermediates, specialty organic chemistry needs, and selective toll manufacturing. These services are provided to third-party pharmaceutical and life sciences firms and other technology firms at fixed costs or predetermined rates on a contract basis. Revenue is recognized as services are performed with billing schedules and payment terms negotiated on a contract-by-contract basis. Payments received in excess of revenue recognized are recorded as deferred revenue. In other cases, services may be provided and revenue is recognized before the customer is invoiced. In these cases, revenue recognized will exceed amounts billed and the difference, representing amounts which are currently unbillable to the customer pursuant to contractual terms, is recorded as an unbilled receivable.

Technology development and support revenue is revenue earned from development and technology evaluation agreements and commercialization assistance fees. Technology development and support revenue is included in contract research services on the Consolidated Statements of Income.

On December 2, 2022, the Company entered into a commercial patent license agreement with Samsung Display Co., Ltd. (SDC), replacing a previous license agreement that had been in place since 2018. This agreement, which covers the manufacture and sale of specified OLED display materials, was effective as of January 1, 2023 and lasts through the end of 2027 with an additional two-year extension option for SDC. Under this agreement, the Company is being paid a license fee, which includes quarterly and annual payments over the agreement term of five years. The agreement conveys to SDC the non-exclusive right to use certain of the Company's intellectual property assets for a limited period of time that is less than the estimated life of the assets.

At the same time the Company entered into the current commercial license agreement with SDC, the Company also entered into a new supplemental material purchase agreement with SDC, which lasts for the same term as the license agreement and is subject to the

same extension option. This new material purchase agreement replaced a previous purchase agreement that had been in place since 2018. Under the supplemental material purchase agreement, SDC agrees to purchase red and green phosphorescent emitter materials from the Company for use in the manufacture of licensed products. This amount purchased is subject to SDC’s requirements for phosphorescent emitter materials and the Company’s ability to meet these requirements over the term of the supplemental agreement.

In 2015, the Company entered into an OLED patent license agreement and an OLED commercial supply agreement with LG Display Co., Ltd. (LG Display), which were effective as of January 1, 2015. The terms of these agreements were extended by a January 1, 2021 amendment through the end of 2025. The patent license agreement provides LG Display a non-exclusive, royalty bearing portfolio license to make and sell OLED displays under the Company's patent portfolio. The patent license calls for license fees, prepaid royalties and running royalties on licensed products. The OLED commercial supply agreement provides for the sale of materials for use by LG Display, which may include phosphorescent emitters and host materials. The agreements provide for certain other minimum obligations relating to the volume of material sales anticipated over the lives of the agreements as well as minimum royalty revenue.

In 2023, the Company entered into new long-term, multi-year agreements with BOE Technology Group Co., Ltd. (BOE). Under these agreements, the Company has granted BOE non-exclusive license rights under various patents owned or controlled by the Company to manufacture and sell OLED display products. The Company supplies phosphorescent OLED materials to BOE for use in its licensed products.

In 2019, the Company entered into an evaluation and commercial supply relationship with Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. (CSOT). In 2020, the Company entered into long-term, multi-year agreements with CSOT. Under these agreements, the Company has granted CSOT non-exclusive license rights under various patents owned or controlled by the Company to manufacture and sell OLED display products. The Company also supplies phosphorescent OLED materials to CSOT for use in its licensed products.

In 2018, the Company entered into long-term, multi-year OLED patent license and material purchase agreements with Visionox Technology, Inc. (Visionox). Under the license agreement, the Company granted certain of Visionox’s affiliates non-exclusive license rights under various patents owned or controlled by the Company to manufacture and sell OLED display products. The license agreement calls for license fees and running royalties on licensed products. Additionally, the Company supplies phosphorescent OLED materials to Visionox for use in its licensed products. In 2021, the Company announced that it had extended the Visionox agreement by entering into new five-year OLED material supply and license agreements with a new affiliate of Visionox, Visionox Hefei Technology Co. Ltd.

In 2016, the Company entered into long-term, multi-year OLED patent license and material purchase agreements with Tianma Micro-electronics Co., Ltd. (Tianma). Under the license agreement, the Company has granted Tianma non-exclusive license rights under various patents owned or controlled by the Company to manufacture and sell OLED display products. The license agreement calls for license fees and running royalties on licensed products. Additionally, the Company supplies phosphorescent OLED materials to Tianma for use in its licensed products. In 2021, the parties extended the terms of both the patent license and material purchase agreements for an additional multi-year-term.

All material sales transactions that are not variable consideration transactions are billed and due within 90 days and substantially all are transacted in U.S. dollars.

Cost of Sales

Cost of Sales

Cost of sales consists of labor and material costs associated with the production of materials processed at the facilities of the Company's manufacturing partner, PPG Industries, Inc. (PPG) and at the Company's internal facilities. The Company’s portion of cost of sales also includes depreciation of manufacturing equipment, as well as manufacturing overhead costs and inventory adjustments for excess and obsolete inventory.

Research and Development

Research and Development

Expenditures for research and development are charged to expense as incurred.

Patent Costs

Patent Costs

Costs associated with patent applications, patent prosecution, patent defense and the maintenance of patents are charged to expense as incurred. Costs to successfully defend a challenge to a patent are capitalized to the extent of an evident increase in the value of the patent. Costs that relate to an unsuccessful outcome are charged to expense.

Amortization of Acquired Technology

Amortization of Acquired Technology

Amortization costs primarily relate to technology acquired from Merck KGaA, Darmstadt, Germany (Merck KGaA) and BASF SE (BASF). The Merck KGaA acquisition was completed on April 28, 2023 and the BASF acquisition was completed during the year ended December 31, 2016. Acquisition costs are being amortized over a period of 10 years for the Merck KGaA and BASF patents.

Amortization of Other Intangible Assets

Amortization of Other Intangible Assets

Other intangible assets from the Adesis acquisition are being amortized over a period of 10 to 15 years. See Note 7 for further discussion.

Translation of Foreign Currency Financial Statements and Foreign Currency Transactions

Translation of Foreign Currency Financial Statements and Foreign Currency Transactions

The Company’s reporting currency is the U.S. dollar. The functional currency for the UDC Ireland and UDC Korea subsidiaries are also the U.S. dollar and the functional currency for the OMM subsidiary and each of the Company's other Asia-Pacific foreign subsidiaries is its respective local currency. The Company translates the amounts included in the Consolidated Statements of Income from OMM and its Asia-Pacific foreign subsidiaries into U.S. dollars at weighted-average exchange rates, which the Company believes are representative of the actual exchange rates on the dates of the transactions. The Company's OMM subsidiary and each of the Company's other Asia-Pacific foreign subsidiaries' assets and liabilities are translated into U.S. dollars from the local currency at the actual exchange rates as of the end of each reporting date, and the Company records the resulting foreign exchange translation adjustments in the Consolidated Balance Sheets as a component of accumulated other comprehensive loss. The overall effect of the translation of foreign currency and foreign currency transactions to date has been insignificant.

Income Taxes

Income Taxes

Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The Company recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount of which the likelihood of realization is greater than 50%. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The Company records interest and penalties, if any, related to unrecognized tax benefits as a component of tax expense.

Share-Based Payment Awards

Share-Based Payment Awards

The Company recognizes in the Consolidated Statements of Income the grant-date fair value of equity-based awards such as shares issued under employee stock purchase plans, restricted stock awards, restricted stock units and performance unit awards issued to employees and directors.

The grant-date fair value of stock awards is based on the closing price of the stock on the date of grant. The fair value of share-based awards is recognized as compensation expense on a straight-line basis over the requisite service period, net of forfeitures. The Company issues new shares upon the respective grant, exercise or vesting of the share-based payment awards, as applicable.

Performance unit awards are subject to either a performance-based or market-based vesting requirement. For performance-based vesting, the grant-date fair value of the award, based on fair value of the Company's common stock, is recognized over the service period based on an assessment of the likelihood that the applicable performance goals will be achieved, and compensation expense is periodically adjusted based on actual and expected performance. Compensation expense for performance unit awards with market-based vesting is calculated based on the estimated fair value as of the grant date utilizing a Monte Carlo simulation model and is recognized over the service period on a straight-line basis.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Adoption of New Accounting Standards

In June 2022, the FASB issued ASU No. 2022-03, Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions. Under this standard, a contractual restriction on the sale of an equity security is not considered in measuring the security's fair value. The standard also requires certain disclosures for equity securities that are subject to

contractual restrictions. The adoption of ASU 2022-03, beginning on January 1, 2024, did not have an impact on the Consolidated Financial Statements and related disclosures.

Accounting Standards Issued But Not Yet Adopted

In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The standard improves the reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. ASU 2023-07 becomes effective during the annual period ending December 31, 2024. The Company is evaluating the potential impact of this standard on its Consolidated Financial Statements and related disclosures.

In December 2023, the FASB issued ASU No. 2023-09, Improvements to Income Tax Disclosures (Topic 740). The standard enhances to the annual income tax disclosures to address investor requests for more information about the tax risks and opportunities present in an entity's worldwide operations. ASU 2023-09 becomes effective January 1, 2025, and the Company is evaluating the potential impact of this standard on its income tax disclosures.

In March 2024, the FASB issued ASU No. 2024-01, Compensation - Stock Compensation (Topic 718). The standard provides guidance to reduce complexity and diversity in practice in determining whether a profits interest award is accounted for as a share-based payment. Early adoption is permitted. This guidance can be applied either retrospectively to all prior periods presented in the financial statements or prospectively to profits interest or similar awards granted or modified on or after the effective date for our application of this guidance. ASU 2024-01 becomes effective January 1, 2025, and the Company is evaluating the potential impact of this standard on its Consolidated Financial Statements and related disclosures.

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CASH, CASH EQUIVALENTS AND INVESTMENTS (Tables)

3 Months Ended

Mar. 31, 2024

Cash and Cash Equivalents [Abstract]

Schedule of Cash, Cash Equivalents

The following table provides details regarding the Company’s portfolio of cash and cash equivalents (in thousands):

	Amortized		Unrealized				Aggregate Fair
Cash and Cash Equivalents Classification	Cost		Gains		(Losses)		Market Value
March 31, 2024
Cash accounts in banking institutions	$	70,765	$	—	$	—	$	70,765
Money market accounts		3,247		—		—		3,247
	$	74,012	$	—	$	—	$	74,012
December 31, 2023
Cash accounts in banking institutions	$	91,717	$	—	$	—	$	91,717
Money market accounts		268		—		—		268
	$	91,985	$	—	$	—	$	91,985

Schedule of Investments

The following table provides details regarding the Company’s portfolio of short-term investments (in thousands):

	Amortized		Unrealized					Aggregate Fair
Short-term Investments Classification	Cost		Gains		(Losses)			Market Value
March 31, 2024
Corporate bonds	$	796	$	1	$	(1	)	$	796
U.S. Government bonds		465,377		10		(979	)		464,408
Marketable securities		89		—		—			89
	$	466,262	$	11	$	(980	)	$	465,293
December 31, 2023
Corporate bonds	$	1,763	$	1	$	(5	)	$	1,759
U.S. Government bonds		420,769		303		(694	)		420,378
	$	422,532	$	304	$	(699	)	$	422,137

Long-term U.S. Government Bond Investments

The following table provides details regarding the Company’s portfolio of long-term investments (in thousands):

	Amortized		Unrealized					Aggregate Fair
Long-term Investments Classification	Cost		Gains		(Losses)			Market Value
March 31, 2024
U.S. Government bonds	$	299,537	$	68	$	(712	)	$	298,893
	$	299,537	$	68	$	(712	)	$	298,893
December 31, 2023
U.S. Government bonds	$	284,053	$	1,457	$	(8	)	$	285,502
	$	284,053	$	1,457	$	(8	)	$	285,502

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FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

The following table provides the assets and liabilities carried at fair value measured on a recurring basis as of March 31, 2024 (in thousands):

			Fair Value Measurements, Using
	Total Carrying Value as of March 31, 2024		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Short-term U.S. Government bonds	$	464,408	$	464,408	$	—	$	—
Long-term U.S. Government bonds		298,893		298,893		—		—
Cash equivalents		3,247		3,247		—		—
Short-term Corporate bonds		796		796		—		—
Short-term Marketable securities		89		89		—		—

The following table provides the assets and liabilities carried at fair value measured on a recurring basis as of December 31, 2023 (in thousands):

			Fair Value Measurements, Using
	Total Carrying Value as of December 31, 2023		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Short-term U.S. Government bonds	$	420,378	$	420,378	$	—	$	—
Long-term U.S. Government bonds		285,502		285,502		—		—
Short-term Corporate bonds		1,759		1,759		—		—
Cash equivalents		268		268		—		—

Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level 3 inputs are unobservable inputs based on management’s own assumptions used to measure assets and liabilities at fair value. A financial asset’s or liability’s classification is determined based on the lowest level input that is significant to the fair value measurement.

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INVENTORY (Tables)

3 Months Ended

Mar. 31, 2024

Inventory Disclosure [Abstract]

Schedule of Inventory

Inventory consisted of the following (in thousands):

	March 31, 2024		December 31, 2023
Raw materials	$	108,681	$	113,400
Work-in-process		13,605		9,433
Finished goods		50,619		52,962
Inventory	$	172,905	$	175,795

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PROPERTY AND EQUIPMENT (Tables)

3 Months Ended

Mar. 31, 2024

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and equipment, net consist of the following (in thousands):

	March 31, 2024			December 31, 2023
Land	$	12,230		$	12,230
Building and improvements		117,505			116,903
Office and lab equipment		150,079			148,465
Furniture, fixtures and computer related assets		18,759			18,970
Construction-in-progress		26,385			22,490
		324,958			319,058
Less: Accumulated depreciation		(149,062	)		(143,908	)
Property and equipment, net	$	175,896		$	175,150

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GOODWILL AND INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 2024

Finite-Lived Intangible Assets, Net [Abstract]

Schedule of Acquired Technology

	March 31, 2024			December 31, 2023
Merck KGaA	$	66,012		$	66,012
BASF		95,989			95,989
Fujifilm		109,462			109,462
Other		5,712			5,712
		277,175			277,175
Less: Accumulated amortization		(191,043	)		(186,850	)
Acquired technology, net	$	86,132		$	90,325

Schedule of Other Intangible Assets

At March 31, 2024, these other intangible assets consist of the following (in thousands):

	March 31, 2024
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer relationships	$	10,520	$	(7,029	)	$	3,491
Developed IP, processes and recipes		4,820		(2,468	)		2,352
Trade name/Trademarks		1,500		(1,155	)		345
Other		448		(117	)		331
Total identifiable other intangible assets	$	17,288	$	(10,769	)	$	6,519

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OTHER ASSETS (Tables)

3 Months Ended

Mar. 31, 2024

Disclosure Text Block [Abstract]

Other Asset

Other assets consist of the following (in thousands):

	March 31, 2024		December 31, 2023
Long-term taxes receivable	$	57,808	$	60,146
Right-of-use assets		23,998		24,910
Long-term unbilled receivables		10,278		9,074
Long-term contract assets		8,688		9,278
Other long-term assets		1,610		1,881
Other assets	$	102,382	$	105,289

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LEASES (Tables)

3 Months Ended

Mar. 31, 2024

Leases [Abstract]

Summary of Operating Lease Cost and Supplemental Cash Flow Information Related to Operating Leases

The following table presents the Company’s operating lease cost and supplemental cash flow information related to the Company’s operating leases (in thousands):

	Three Months Ended March 31,
	2024		2023
Operating lease cost	$	1,103	$	1,221
Non-cash activity:
Right-of-use assets obtained in exchange for lease obligations	$	—	$	—

Schedule of Operating Lease Right of Use Assets and Liabilities

The following table presents the Company’s operating lease right-of-use assets and liabilities (in thousands):

	March 31, 2024		December 31, 2023
Right-of-use assets	$	23,998	$	24,910
Short-term lease liabilities		3,582		3,533
Long-term lease liabilities		21,945		22,855

Schedule of Weighted Average Assumptions Used to Compute Right-of-use Assets and Lease Liabilities

The following table presents weighted average assumptions used to compute the Company’s right-of-use assets and lease liabilities:

	March 31, 2024
Weighted average remaining lease term (in years)		6.5
Weighted average discount rate		3.7	%

Schedule of Undiscounted Future Minimum Lease Payments Having Non-cancelable Lease Terms

Undiscounted future minimum lease payments as of March 31, 2024, by year and in the aggregate, having non-cancelable lease terms in excess of one year were as follows (in thousands):

	Maturities of Operating Lease Liabilities
2024 (1)	$	3,210
2025		4,315
2026		4,395
2027		4,317
2028		4,026
Thereafter		8,052
Total lease payments		28,315
Less: Imputed interest		(2,788	)
Present value of lease payments	$	25,527

(1)Scheduled maturities of lease liabilities represent the period from April 1, 2024 to December 31, 2024.

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ACCRUED EXPENSES (Tables)

3 Months Ended

Mar. 31, 2024

Payables and Accruals [Abstract]

Accrued Expenses

Accrued expenses consist of the following (in thousands):

	March 31, 2024		December 31, 2023
PPG Industries, Inc. agreement	$	14,620	$	11,962
Compensation		14,174		29,456
Royalties		2,225		647
Consulting		2,116		2,121
Professional fees		1,258		1,124
Research and development agreements		687		822
Other		7,019		5,948
Accrued expenses	$	42,099	$	52,080

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OTHER LIABILITIES (Tables)

3 Months Ended

Mar. 31, 2024

Other Liabilities [Abstract]

Schedule of other liabilities

Other liabilities consist of the following (in thousands):

	March 31, 2024		December 31, 2023
Long-term lease liabilities	$	21,945	$	22,855
Long-term taxes payable		15,749		15,749
Other long-term liabilities		282		54
Other liabilities	$	37,976	$	38,658

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ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)

3 Months Ended

Mar. 31, 2024

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Loss

Amounts related to the changes in accumulated other comprehensive loss were as follows (in thousands):

	Unrealized Gain (Loss) on Available-for-Sale Securities			Net Unrealized Gain (Loss) on Retirement Plan (2)			Change in Cumulative Foreign Currency Translation Adjustment			Total			Affected Line Items in the Consolidated Statements of Income
Balance December 31, 2023, net of tax	$	858		$	(1,808	)	$	(136	)	$	(1,086	)
Other comprehensive (loss) gain    before reclassification		(2,666	)		—			(50	)		(2,716	)
Reclassification to net income (1)		—			8			—			8		Selling, general and administrative, research and development and cost of sales
Change during period		(2,666	)		8			(50	)		(2,708	)
Balance March 31, 2024, net of tax	$	(1,808	)	$	(1,800	)	$	(186	)	$	(3,794	)

	Unrealized Gain (Loss) on Available-for-Sale Securities			Net Unrealized Gain (Loss) on Retirement Plan (2)			Change in Cumulative Foreign Currency Translation Adjustment			Total			Affected Line Items in the Consolidated Statements of Income
Balance December 31, 2022, net of tax	$	(7,887	)	$	(10,011	)	$	(554	)	$	(18,452	)
Other comprehensive gain    before reclassification		2,627			—			95			2,722
Reclassification to net income (1)		—			253			—			253		Selling, general and administrative, research and development and cost of sales
Change during period		2,627			253			95			2,975
Balance March 31, 2023, net of tax	$	(5,260	)	$	(9,758	)	$	(459	)	$	(15,477	)

(1)The Company reclassified amortization of prior service cost and actuarial loss for its retirement plan from accumulated other comprehensive loss to net income of $8,000 and $253,000 for the three months ended March 31, 2024 and 2023, respectively.

(2)Refer to Note 17: Retirement Plan Benefit Liability.

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SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN (Tables)

3 Months Ended

Mar. 31, 2024

Retirement Benefits [Abstract]

Components of Net Periodic Pension Cost

The components of net periodic pension cost were as follows (in thousands):

	Three Months Ended March 31,
	2024		2023
Service cost	$	212	$	238
Interest cost		610		724
Amortization of prior service cost		11		204
Amortization of loss		—		120
Total net periodic benefit cost	$	833	$	1,286

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CONCENTRATION OF RISK (Tables)

3 Months Ended

Mar. 31, 2024

Risks and Uncertainties [Abstract]

Revenues and Accounts Receivable From Our Largest Customers

Revenues and accounts receivable from the Company's largest customers were as follows (in thousands):

	% of Total Revenue for the  Three Months Ended March 31,		Accounts Receivable as of
Customer	2024	2023	March 31, 2024
A	41%	30%	$	40,021
B	25%	26%	$	40,165
C	16%	21%	$	15,289

Revenues by Geographic Area

Revenues from outside of North America represented approximately 98% and 97% of consolidated revenue for the three months ended March 31, 2024 and 2023, respectively. Revenues by geographic area are as follows (in thousands):

	Three Months Ended March 31,
Country	2024		2023
South Korea	$	102,398	$	66,060
China		57,470		57,427
Japan		1,254		1,647
Other non-U.S. locations		1,665		1,337
Total non-U.S. locations		162,787		126,471
United States		2,472		3,996
Total revenue	$	165,259	$	130,467

Long-Lived Assets (Net) by Geographic Area

, net by geographic area are as follows (in thousands):

	March 31, 2024		December 31, 2023
United States	$	117,389	$	118,250
Ireland		43,703		42,203
Other		14,804		14,697
Total property and equipment, net	$	175,896	$	175,150

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REVENUE RECOGNITION (Tables)

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

Schedule of Assets and Liabilities Associated with Contracts from Customers

The following table provides information about assets and liabilities associated with our contracts from customers (in thousands):

	As of March 31, 2024
Accounts receivable	$	119,584
Short-term unbilled receivables		22,440
Long-term unbilled receivables		10,278
Short-term contract assets		2,747
Long-term contract assets		8,688
Short-term deferred revenue		19,157
Long-term deferred revenue		13,292

Summary of Significant Changes in Unbilled Receivables and Deferred Liabilities Balances

Significant changes in the assets and liabilities balances associated with the Company's contracts from customers for the three months ended March 31, 2024 and 2023 are as follows (in thousands):

	Three Months Ended March 31, 2024
	Assets			Liabilities
Balance at December 31, 2023	$	42,134		$	(59,719	)
Revenue recognized that was previously included in deferred revenue, net		—			61,095
Increases due to cash received		—			(33,323	)
Cumulative catch-up adjustment arising from changes in estimates of    transaction price, net		—			(502	)
Unbilled receivables recorded, net		2,560			—
Contract assets recorded, net		(541	)		—
Net change		2,019			27,270
Balance at March 31, 2024	$	44,153		$	(32,449	)

	Three Months Ended March 31, 2023
	Assets			Liabilities
Balance at December 31, 2022	$	38,457		$	(63,878	)
Revenue recognized that was previously included in deferred revenue, net		—			41,086
Increases due to cash received		—			(38,153	)
Cumulative catch-up adjustment arising from changes in estimates of    transaction price, net		—			5,683
Unbilled receivables recorded, net		11,878			—
Contract assets recorded, net		(520	)		—
Transferred to receivables from unbilled receivables		(19,983	)		—
Net change		(8,625	)		8,616
Balance at March 31, 2023	$	29,832		$	(55,262	)

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NET INCOME PER COMMON SHARE (Tables)

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

Schedule of Earnings Per Share

The following table is a reconciliation of net income and the shares used in calculating basic and diluted net income per common share for the three months ended March 31, 2024 and 2023 (in thousands, except share and per share data):

	Three Months Ended March 31,
	2024			2023
Numerator:
Net income	$	56,853		$	39,839
Adjustment for Basic EPS:
Earnings allocated to unvested shareholders		(201	)		(213	)
Adjusted net income	$	56,652		$	39,626
Denominator:
Weighted average common shares outstanding – Basic		47,557,959			47,523,593
Effect of dilutive shares:
Common stock equivalents arising from stock options and ESPP		462			940
Restricted stock awards and units and performance units		70,071			42,474
Weighted average common shares outstanding – Diluted		47,628,492			47,567,007
Net income per common share:
Basic	$	1.19		$	0.83
Diluted	$	1.19		$	0.83

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BUSINESS - Additional Information (Details)	Mar. 31, 2024 Patent
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of patents issued and pending application	6,000

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)	3 Months Ended
	Mar. 31, 2024	Jun. 28, 2016
Summary Of Significant Accounting Policies [Line Items]
Recognized income tax positions measured at likelihood of realization description	Recognized income tax positions are measured at the largest amount of which the likelihood of realization is greater than 50%
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Recognized income tax positions measured at percentage of likelihood of realization	50.00%
Visionox Hefei Technology Co. Ltd [Member]
Summary Of Significant Accounting Policies [Line Items]
Additional agreement duration	5 years
BASF [Member] | Patents [Member]
Summary Of Significant Accounting Policies [Line Items]
OLED patents useful life	10 years	10 years
Adesis, Inc. [Member] | Other Intangible Assets [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Amortization period of acquired intangible assets (in years)	10 years
Adesis, Inc. [Member] | Other Intangible Assets [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Amortization period of acquired intangible assets (in years)	15 years

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CASH, CASH EQUIVALENTS AND INVESTMENTS - Schedule of Cash, Cash Equivalents (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Cash And Cash Equivalents [Line Items]
Cash Equivalents, at Carrying Value	$ 74,012	$ 91,985
Cash Equivalents, Gross Unrealized Gains	0	0
Cash Equivalents, Gross Unrealized Losses	0	0
Cash and Cash Equivalents, Fair Value Disclosure	74,012	91,985
Cash Accounts in Banking Institutions [Member]
Cash And Cash Equivalents [Line Items]
Cash Equivalents, at Carrying Value	70,765	91,717
Cash Equivalents, Gross Unrealized Gains	0	0
Cash Equivalents, Gross Unrealized Losses	0	0
Cash and Cash Equivalents, Fair Value Disclosure	70,765	91,717
Money Market Accounts [Member]
Cash And Cash Equivalents [Line Items]
Cash Equivalents, at Carrying Value	3,247	268
Cash Equivalents, Gross Unrealized Gains	0	0
Cash Equivalents, Gross Unrealized Losses	0	0
Cash and Cash Equivalents, Fair Value Disclosure	$ 3,247	$ 268

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CASH, CASH EQUIVALENTS AND INVESTMENTS - Schedule of Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Short-term Investments [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	$ 466,262	$ 422,532
Available-for-sale Securities, Gross Unrealized Gains	11	304
Available-for-sale Securities, Gross Unrealized Losses	(980)	(699)
Available-for-sale Securities, Fair Value Disclosure	465,293	422,137
Long-term Investments [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	299,537	284,053
Available-for-sale Securities, Gross Unrealized Gains	68	1,457
Available-for-sale Securities, Gross Unrealized Losses	(712)	(8)
Available-for-sale Securities, Fair Value Disclosure	298,893	285,502
Corporate Bonds [Member] | Short-term Investments [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	796	1,763
Available-for-sale Securities, Gross Unrealized Gains	1	1
Available-for-sale Securities, Gross Unrealized Losses	(1)	(5)
Available-for-sale Securities, Fair Value Disclosure	796	1,759
U.S. Government Bonds [Member] | Short-term Investments [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	465,377	420,769
Available-for-sale Securities, Gross Unrealized Gains	10	303
Available-for-sale Securities, Gross Unrealized Losses	(979)	(694)
Available-for-sale Securities, Fair Value Disclosure	464,408	420,378
U.S. Government Bonds [Member] | Long-term Investments [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	299,537	284,053
Available-for-sale Securities, Gross Unrealized Gains	68	1,457
Available-for-sale Securities, Gross Unrealized Losses	(712)	(8)
Available-for-sale Securities, Fair Value Disclosure	298,893	$ 285,502
Marketable Securities [Member] | Short-term Investments [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	89
Available-for-sale Securities, Gross Unrealized Gains	0
Available-for-sale Securities, Gross Unrealized Losses	0
Available-for-sale Securities, Fair Value Disclosure	$ 89

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CASH, CASH EQUIVALENTS AND INVESTMENTS - Additional Information (Details) $ in Millions	Mar. 31, 2024 USD ($)
Cash And Cash Equivalents [Line Items]
Minority investment, carrying value	$ 14.0

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FAIR VALUE MEASUREMENTS - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 74,012	$ 91,985
Short-term investments	465,293	422,137
Short-term U.S. Government bonds investments	2,747
Long-term U.S. Government bonds investments	312,939	299,548
Fair Value, Measurements, Recurring [Member] | Reported Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	3,247	268
Short-term investments	796	1,759
Short-term U.S. Government bonds investments	464,408	420,378
Short-term Marketable securities	89
Long-term U.S. Government bonds investments	298,893	285,502
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	3,247	268
Short-term investments	796	1,759
Short-term U.S. Government bonds investments	464,408	420,378
Short-term Marketable securities	89
Long-term U.S. Government bonds investments	$ 298,893	$ 285,502

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FAIR VALUE MEASUREMENTS - Additional Information (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Credit losses on debt investments	$ 0	$ 0

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INVENTORY - Schedule of Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Inventory Disclosure [Abstract]
Raw materials	$ 108,681	$ 113,400
Work-in-process	13,605	9,433
Finished goods	50,619	52,962
Inventory	$ 172,905	$ 175,795

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INVENTORY - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Inventory Disclosure [Abstract]
Change in inventory reserve	$ 3.3	$ 3.3

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PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 324,958	$ 319,058
Less: Accumulated depreciation	(149,062)	(143,908)
Property and equipment, net	175,896	175,150
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	12,230	12,230
Building and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	117,505	116,903
Office and lab equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	150,079	148,465
Furniture, fixtures and computer related assets [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	18,759	18,970
Construction-in-progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 26,385	$ 22,490

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PROPERTY AND EQUIPMENT - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 6,616	$ 6,496

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GOODWILL AND INTANGIBLE ASSETS - Schedule of Acquired Technology (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Acquired technology, gross	$ 277,175	$ 277,175
Less: Accumulated amortization	(191,043)	(186,850)
Acquired technology, net	86,132	90,325
Merck KGaA[Member]
Finite-Lived Intangible Assets [Line Items]
Acquired technology, gross	66,012	66,012
BASF [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired technology, gross	95,989	95,989
FUJIFILM [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired technology, gross	109,462	109,462
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired technology, gross	$ 5,712	$ 5,712

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GOODWILL AND INTANGIBLE ASSETS - Acquired Technology - Additional Information (Details) $ in Thousands, € in Millions					3 Months Ended
	Apr. 28, 2023 USD ($) Board_member	Jun. 28, 2016 USD ($) Patent	Jun. 28, 2016 EUR (€) Patent	Jul. 23, 2012 USD ($) Patent	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2029 USD ($)	Dec. 31, 2028 USD ($)	Dec. 31, 2027 USD ($)	Dec. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Apr. 30, 2023 USD ($)
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets					$ 4,548	$ 2,891
Future amortization expense, 2024												$ 12,600
Future amortization expense, 2025											$ 16,800
Future amortization expense, 2026										$ 12,000
Future amortization expense, 2027								$ 7,200	$ 7,200
Future amortization expense, thereafter							$ 30,300
Patent Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets					$ 4,200	$ 2,500
Patents [Member] | FUJIFILM [Member]
Finite-Lived Intangible Assets [Line Items]
Number of patents acquired (more than) | Patent				1,200
Assigned value of acquired intangible assets				$ 105,000
Cash paid for OLED patents				$ 4,500
Patents [Member] | BASF [Member]
Finite-Lived Intangible Assets [Line Items]
Number of patents acquired (more than) | Patent		500	500
Assigned value of acquired intangible assets		$ 95,800	€ 86.8
Cash paid for OLED patents		$ 217,000
OLED patents useful life		10 years			10 years
Acquisition Costs, Period Cost		$ 95,800	€ 86.8
Patents [Member] | Merck KGaA[Member]
Finite-Lived Intangible Assets [Line Items]
Number of patents acquired (more than) | Board_member	550
Assigned value of acquired intangible assets	$ 66,000
Cash paid for OLED patents													$ 66,000
OLED patents useful life													10 years

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GOODWILL AND INTANGIBLE ASSETS - Other Intangible Assets - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2029	Dec. 31, 2028	Dec. 31, 2027
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	$ 16,800,000
Future amortization expense of other intangible assets, fiscal year2024	1,000,000
Finite-Lived Intangible Asset, Expected Amortization, Year Five				$ 7,200,000	$ 7,200,000
Finite-Lived Intangible Asset, Expected Amortization, after Year Five			$ 30,300,000
Adesis, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	17,288,000
Amortization expense related to other intangible assets	356,000	$ 352,000
Future amortization expense of other intangible assets, fiscal year 2026	1,300,000
Other Finite Lived Intangible Assets Amortization Expense Year Five	422,000,000
Future amortization expense of other intangible assets, thereafter	1,000,000
Future amortization expense of other intangible assets, fiscal year 2025	1,400,000
Adesis, Inc. [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	$ 10,520,000
Weighted average useful life , intangible assets	11 years 6 months
Adesis, Inc. [Member] | Internally-developed IP, Processes and Recipes [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	$ 4,820,000
Weighted average useful life , intangible assets	15 years
Adesis, Inc. [Member] | Trade Name/Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	$ 1,500,000
Weighted average useful life , intangible assets	10 years

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GOODWILL AND INTANGIBLE ASSETS - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 16,800
Accumulated Amortization	(10,769)	$ (10,414)
Net Carrying Amount	6,519	$ 6,874
Adesis, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	17,288
Accumulated Amortization	(10,769)
Net Carrying Amount	6,519
Customer Relationships [Member] | Adesis, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	10,520
Accumulated Amortization	(7,029)
Net Carrying Amount	3,491
Developed IP, Processes and Recipes [Member] | Adesis, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,820
Accumulated Amortization	(2,468)
Net Carrying Amount	2,352
Trade Name/Trademarks [Member] | Adesis, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,500
Accumulated Amortization	(1,155)
Net Carrying Amount	345
Other [Member] | Adesis, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	448
Accumulated Amortization	(117)
Net Carrying Amount	$ 331

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OTHER ASSETS - Schedule Of Other assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Other Assets [Abstract]
Long-term taxes receivable	$ 57,808	$ 60,146
Right-of-use assets	23,998	24,910
Long-term unbilled receivables	$ 10,278	$ 9,074
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent	Other Assets, Noncurrent
Long-term contract assets	$ 8,688	$ 9,278
Other long-term assets	1,610	1,881
Other Assets	$ 102,382	$ 105,289

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LEASES- Additional Information (Details)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Lessee Lease Description [Line Items]
Operating lease description	As of March 31, 2024, the Company did not have any finance leases and no additional operating leases that have not yet commenced.
Minimum [Member]
Lessee Lease Description [Line Items]
Operating leases remaining term
Operating lease, option to extend		true
Maximum [Member]
Lessee Lease Description [Line Items]
Operating leases remaining term	8 years

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LEASES - Summary of Operating Lease Cost and Supplemental Cash Flow Information Related to Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Leases [Abstract]
Operating lease cost	$ 1,103	$ 1,221
Non-cash activity:
Right-of-use assets obtained in exchange for lease obligations	$ 0	$ 0

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LEASES - Schedule Of Operating Lease Right of Use Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Lessee Lease Description [Line Items]
Right-of-use assets	$ 23,998	$ 24,910
Short-term lease liabilities	$ 3,582	$ 3,533
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Current	Other Liabilities, Current
Long-term lease liabilities	$ 21,945	$ 22,855
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent

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LEASES - Schedule of Weighted Average Assumptions Used to Compute Right-of-use Assets and Lease Liabilities (Details)	Mar. 31, 2024
Leases [Abstract]
Weighted average remaining lease term (in years)	6 years 6 months
Weighted average discount rate	3.70%

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LEASES - Schedule of Undiscounted Future Minimum Lease Payments Having Non-cancelable Lease Terms (Details) $ in Thousands	Mar. 31, 2024 USD ($)
Lessee Lease Description [Line Items]
2024	$ 3,210	[1]
2025	4,315
2026	4,395
2027	4,317
2028	4,026
Thereafter	8,052
Total lease payments	28,315
Less: Imputed interest	(2,788)
Present value of lease payments	$ 25,527

[1] Scheduled maturities of lease liabilities represent the period from April 1, 2024 to December 31, 2024.

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ACCRUED EXPENSES - Schedule Of Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Payables and Accruals [Abstract]
PPG Industries, Inc. agreement	$ 14,620	$ 11,962
Compensation	14,174	29,456
Royalties	2,225	647
Consulting	2,116	2,121
Professional fees	1,258	1,124
Research and development agreements	687	822
Other	7,019	5,948
Accrued expenses	$ 42,099	$ 52,080

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OTHER LIABILITIES - Summary of Other liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Long-term lease liabilities	$ 21,945	$ 22,855
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Long-term taxes payable	$ 15,749	$ 15,749
Other long-term liabilities	282	54
Other liabilities	$ 37,976	$ 38,658

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RESEARCH AND LICENSE AGREEMENTS WITH ACADEMIC PARTNERS - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Royalty expense	$ 1,651,000	$ 164,000
1997 Amended License Agreement [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Royalty expense	1,600,000	159,000
2006 Research Agreement [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Maximum obligation	1,700,000
Research and development expense incurred	$ 267,000	$ 282,000

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EQUITY AND CASH COMPENSATION UNDER THE PPG AGREEMENTS - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Long-term Purchase Commitment [Line Items]
Percent of services payable in cash or shares	50.00%
Issuance of common stock in connection with materials and license agreements (in shares)	0
Charges to expense for cash portion of reimbursement of expenses	$ 4.5	$ 2.0
New OLED Materials Agreement and OLED Materials Agreement [Member] | Weighted Average
Long-term Purchase Commitment [Line Items]
Minimum average closing price of common stock (in dollars per share)	$ 20

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SHAREHOLDERS' EQUITY - Additional Information (Details) $ / shares in Units, $ in Millions		3 Months Ended
	Apr. 30, 2024 $ / shares	Mar. 31, 2024 USD ($) Board_member $ / shares shares	Mar. 31, 2023 $ / shares shares	Dec. 31, 2023 $ / shares shares
Class Of Stock [Line Items]
Preferred Stock, shares authorized ( in shares)		5,000,000		5,000,000
Common Stock, shares authorized (in shares)		200,000,000		200,000,000
Common Stock, par value (in dollars per share) | $ / shares		$ 0.01		$ 0.01
Common Stock, shares issued (in shares)		48,804,964		48,731,026
Common Stock, shares outstanding (in shares)		47,439,316		47,365,378
Treasury stock repurchased shares		0	0
Common stock dividends declared per share | $ / shares		$ 0.4	$ 0.35
Common stock dividends paid per share | $ / shares		$ 0.4
Common stock dividends paid | $		$ 19.5
Number of board members elected by class A shareholders | Board_member		2
Subsequent Event [Member]
Class Of Stock [Line Items]
Common stock dividends declared per share | $ / shares	$ 0.4
Dividend payable date	Jun. 28, 2024
Dividend record date	Jun. 14, 2024
Series A Nonconvertible Preferred Stock
Class Of Stock [Line Items]
Preferred Stock, shares issued (in shares)		200,000		200,000
Preferred Stock, liquidation value per share (in dollars per share) | $ / shares		$ 7.5		$ 7.5
Preferred stock voting rights		Holders of the Series A shares are entitled to one vote per share on matters which shareholders are generally entitled to vote
1995 | Series A Nonconvertible Preferred Stock
Class Of Stock [Line Items]
Preferred Stock, shares issued (in shares)		200,000

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SHAREHOLDERS' EQUITY - Deferred Compensation Arrangement - Additional Information (Details) - Employees And Non Employee Members Of Scientific Advisory Board Member - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Deferred Compensation Arrangement with Employees and Non-Employees, Share-Based Payments [Line Items]
Shares issued (in shares)	1,616	2,366
Fair value of shares issued	$ 300,000	$ 300,000

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ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Accumulated Other Comprehensive Loss (Details) - USD ($)		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
BALANCE		$ 1,447,226,000	$ 1,275,369,000
Reclassification to net income		8,000	253,000
Other comprehensive loss		(2,708,000)	2,975,000
BALANCE		1,484,900,000	1,299,465,000
Unrealized gain (loss) on available-for-sale securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
BALANCE		858,000	(7,887,000)
Other comprehensive gain (loss) before reclassification		(2,666,000)	2,627,000
Reclassification to net income	[1]	0	0
Other comprehensive loss		(2,666,000)	2,627,000
BALANCE		(1,808,000)	(5,260,000)
Net unrealized gain (loss) on retirement plan [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
BALANCE	[2]	(1,808,000)	(10,011,000)
Other comprehensive gain (loss) before reclassification	[2]	0	0
Reclassification to net income	[1],[2]	8,000	253,000
Other comprehensive loss	[2]	8,000	253,000
BALANCE	[2]	(1,800,000)	(9,758,000)
Change in cumulative foreign currency translation adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
BALANCE		(136,000)	(554,000)
Other comprehensive gain (loss) before reclassification		(50,000)	95,000
Reclassification to net income	[1]	0	0
Other comprehensive loss		(50,000)	95,000
BALANCE		(186,000)	(459,000)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
BALANCE		(1,086,000)	(18,452,000)
Other comprehensive gain (loss) before reclassification		(2,716,000)	2,722,000
Reclassification to net income	[1]	8,000	253,000
Other comprehensive loss		(2,708,000)	2,975,000
BALANCE		$ (3,794,000)	$ (15,477,000)

[1] The Company reclassified amortization of prior service cost and actuarial loss for its retirement plan from accumulated other comprehensive loss to net income of $8,000 and $253,000 for the three months ended March 31, 2024 and 2023, respectively.

[2] Refer to Note 17: Retirement Plan Benefit Liability.

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ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Accumulated Other Comprehensive Loss (Parenthetical) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Reclassification to net income	$ 8,000	$ 253,000

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STOCK-BASED COMPENSATION - Equity Compensation Plan - Additional Information (Details) - Equity Compensation Plan [Member]	3 Months Ended
	Mar. 31, 2024 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares)	1,347,660
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration term (in years)	10 years

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STOCK-BASED COMPENSATION - Equity Instruments Other Than Options - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of shares withheld for tax withholding obligations	$ 7,058,000	$ 7,181,000
Employees And Non Employee Members Of Scientific Advisory Board Member
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of shares issued	$ 300,000	$ 300,000
Shares issued (in shares)	1,616	2,366
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of shares issued	$ 395,000	$ 355,000
Shares issued (in shares)	2,392	3,104
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (shares)	84,089
Total fair value of performance unit awards granted	$ 13,800,000
Shares withheld for employee taxes (shares)	31,669	46,353
Shares withheld for employee taxes	$ 5,600,000	$ 6,400,000
Restricted Stock [Member] | Selling, General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	2,200,000	3,100,000
Restricted Stock [Member] | Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	1,400,000	1,500,000
Restricted Stock [Member] | Cost of Sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 436,000	531,000
Restricted Stock [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards and units vesting terms	3 years
Restricted Stock [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards and units vesting terms	5 years
Restricted Stock Units (RSUs) [Member] | Research and Development Expense [Member] | Non Employee Members of Scientific Advisory Board [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 62,000	$ 68,000
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (shares)	17,401
Total fair value of performance unit awards granted	$ 11,400,000
Shares withheld for tax withholding obligations (in shares)	8,160	5,350
Fair value of shares withheld for tax withholding obligations	$ 1,400,000	$ 750,000
Performance Shares [Member] | Performance-Based Vesting Requirement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (shares)	34,798
Performance Shares [Member] | Incremental Performance Based [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (shares)	69,600
Performance Shares [Member] | Market-Based Vesting Requirement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (shares)	17,401
Performance Shares [Member] | Selling, General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 2,500,000	890,000
Performance Shares [Member] | Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	1,200,000	231,000
Performance Shares [Member] | Cost of Sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 748,000	$ 143,000

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STOCK-BASED COMPENSATION - Employee Stock Purchase Plan - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 25, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from common stock issued	$ 803,000	$ 655,000
Employee Stock Purchase Plan (ESPP) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved for issuance (in shares)			1,000,000
Percentage of market value (in hundredths)	85.00%
Maximum allocation of base compensation (in hundredths)	10.00%
Maximum shares per purchase date (in shares)	12,500
Maximum value per calendar year, per employee	$ 25,000,000
Common stock issued (in shares)	4,463	5,639
Proceeds from common stock issued	$ 639,000	$ 518,000
Employee Stock Purchase Plan ESPP Purchase Period1	3 months
Employee Stock Purchase Plan (ESPP) [Member] | Selling, General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Charges to expense	$ 37,000	40,000
Employee Stock Purchase Plan (ESPP) [Member] | Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Charges to expense	76,000	71,000
Employee Stock Purchase Plan (ESPP) [Member] | Cost of Sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Charges to expense	$ 51,000	$ 41,000

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SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN - Additional Information (Details) - Supplemental Executive Retirement Plan [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) Participant
Defined Benefit Plan Disclosure [Line Items]
Number of participants | Participant	8
Benefit Payments | $	$ 504,000

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SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Components of net periodic pension cost [Abstract]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Liability, Defined Benefit Plan, Noncurrent	Liability, Defined Benefit Plan, Noncurrent
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Liability, Defined Benefit Plan, Noncurrent	Liability, Defined Benefit Plan, Noncurrent
Supplemental Executive Retirement Plan [Member]
Components of net periodic pension cost [Abstract]
Service cost	$ 212	$ 238
Interest cost	610	724
Amortization of prior service cost	11	204
Amortization of loss	0	120
Total net periodic benefit cost	$ 833	$ 1,286

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COMMITMENTS AND CONTINGENCIES - Additional Information (Details) $ in Millions	Mar. 31, 2024 USD ($) Multiple Employee ExecutiveOfficer	Dec. 31, 2023 USD ($)
Loss Contingencies [Line Items]
Purchase commitments for inventory | $	$ 29.7	$ 29.8
Commitment With Executive Officers [Member]
Loss Contingencies [Line Items]
Number of executive officers under agreement | ExecutiveOfficer	5
Number of employees under agreement | Employee	11
Commitment With Senior Level Employees [Member]
Loss Contingencies [Line Items]
Multiple of sum of average annual base salary and bonus agreement terms	2
Commitment With Senior Level Employees [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Multiple of sum of average annual base salary and bonus agreement terms	1
Commitment With Senior Level Employees [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Multiple of sum of average annual base salary and bonus agreement terms	2

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CONCENTRATION OF RISK - Revenues and Accounts Receivable From Our Largest Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Concentration Risk [Line Items]
Accounts Receivable	$ 119,584		$ 139,850
Major Customer A [Member] | Total Revenue [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
% of Total Revenue	41.00%	30.00%
Major Customer A [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Accounts Receivable	$ 40,021
Major Customer B [Member] | Total Revenue [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
% of Total Revenue	25.00%	26.00%
Major Customer B [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Accounts Receivable	$ 40,165
Major Customer C [Member] | Total Revenue [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
% of Total Revenue	16.00%	21.00%
Major Customer C [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Accounts Receivable	$ 15,289

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CONCENTRATION OF RISK - Additional Information (Details) - Supplier	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Concentration Risk [Line Items]
Number of suppliers from which chemical materials were purchased	1
Excluding North America [Member] | Total Revenue [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage (less than 1% for contracts with U.S. government agencies)		98.00%	97.00%

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CONCENTRATION OF RISK - Revenues by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Concentration Risk [Line Items]
Total revenue	$ 165,259	$ 130,467
South Korea [Member]
Concentration Risk [Line Items]
Total revenue	102,398	66,060
China [Member]
Concentration Risk [Line Items]
Total revenue	57,470	57,427
Japan [Member]
Concentration Risk [Line Items]
Total revenue	1,254	1,647
Other Non-U.S. Locations [Member]
Concentration Risk [Line Items]
Total revenue	1,665	1,337
Total Non-U.S. Locations [Member]
Concentration Risk [Line Items]
Total revenue	162,787	126,471
United States [Member]
Concentration Risk [Line Items]
Total revenue	$ 2,472	$ 3,996

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CONCENTRATION OF RISK - Long-Lived Assets (Net) by Geographic Area (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total long-lived assets	$ 175,896	$ 175,150
United States [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	117,389	118,250
Ireland [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	43,703	42,203
Other [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	$ 14,804	$ 14,697

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INCOME TAXES - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		48 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2023
Income Taxes [Line Items]
Effective income tax rate (benefit) expense, percent	19.40%	22.80%
Income tax expense (benefit)	$ 13,644	$ 11,793
Long-term asset	$ 102,382			$ 105,289
State and foreign income tax returns subject to examination period minimum (in years)	3 years
State and foreign income tax returns subject to examination period maximum (in years)	4 years
South Korea [Member]
Income Taxes [Line Items]
Long-term asset	$ 57,800			60,100
Foreign exchange loss	2,300	$ 1,000
Current income tax expense			$ 14,900
Allocation of Withholding to Non-Korean Patents [Member] | U.S.Federal Government [Member]
Income Taxes [Line Items]
Estimated settlement amounts due (refunds) from withholding taxes	$ 15,700			$ 15,700

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REVENUE RECOGNITION - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation Of Revenue [Line Items]
Backlog associated with committed purchase orders from customers	$ 35,900,000
Cumulative catch-up adjustment arising from decrease in estimates of transaction price	$ 502,000
Contract catch-up adjustment to revenue increased in estimate of transaction price		$ 5,700,000
Revenue from Contracts with Customers - ASU No. 2014-09 [Member]
Disaggregation Of Revenue [Line Items]
Percentage of revenue recorded from sales of materials	98.00%	96.00%
Revenue from Contracts with Customers - ASU No. 2014-09 [Member] | Adesis, Inc. [Member]
Disaggregation Of Revenue [Line Items]
Percentage of revenue recorded from provision of services	2.00%	4.00%

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REVENUE RECOGNITION - Schedule of Assets and Liabilities Associated with Contracts from Customers (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Disaggregation Of Revenue [Line Items]
Accounts receivable	$ 119,584	$ 139,850
Short-term unbilled receivables	22,440
Long-term unbilled receivables	10,278
Short-term contract assets	2,747
Long-term contract assets	8,688
Short-term deferred revenue	19,157	47,713
Long-term deferred revenue	$ 13,292	$ 12,006

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REVENUE RECOGNITION - Summary of Significant Changes in Unbilled Receivables and Deferred Liabilities Balances (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Deferred Revenue (Increase) Decrease
Balance	$ (59,719)	$ (63,878)
Revenue recognized that was previously included in deferred revenue	61,095	41,086
Increases due to cash received	(33,323)	(38,153)
Cumulative catch-up adjustment arising from changes in estimates of transaction price, net	(502)	5,683
Net change	27,270	8,616
Balance	(32,449)	(55,262)
Unbilled Receivables Increase (Decrease)
Balance	42,134	38,457
Unbilled receivables recorded, net	2,560	11,878
Contract assets recorded, net	(541)	(520)
Transferred to receivables from unbilled receivables		(19,983)
Net change	2,019	(8,625)
Balance	$ 44,153	$ 29,832

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NET INCOME PER COMMON SHARE - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator:
Net income	$ 56,853	$ 39,839
Adjustment for Basic EPS:
Earnings allocated to unvested shareholders	(201)	(213)
Adjusted net income	$ 56,652	$ 39,626
Denominator:
Weighted average common shares outstanding – Basic	47,557,959	47,523,593
Effect of dilutive shares:
Common stock equivalents arising from stock options and ESPP	462	940
Restricted stock awards and units and performance units	70,071	42,474
Weighted average common shares outstanding – Diluted	47,628,492	47,567,007
Basic	$ 1.19	$ 0.83
Diluted	$ 1.19	$ 0.83

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NET INCOME PER COMMON SHARE - Additional Information (Details) - shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Antidilutive securities excluded from calculation of diluted EPS	27,453	41,505