OLED · Annual Report (Form 10-K) · Filed February 19, 2026

Universal Display Corp — 10-K exhibit

oled-ex21.htm

Universal Display Corp on Boardroom Alpha

EX-21

Exhibit 21

SUBSIDIARIES OF THE REGISTRANT

UDC, Inc., a New Jersey corporation.

Adesis, Inc., a Delaware corporation.

Universal Display Corporation Hong Kong, Limited, a Hong Kong limited liability entity.

Universal Display Corporation Korea, Y.H., a limited liability entity organized under the laws of the Republic of Korea.

Universal Display Corporation Japan GK, a limited liability entity organized under the laws of Japan.

UDC Ireland Limited, a private company limited by shares, organized under the laws of Ireland.

Universal Display Corporation China, Ltd., a wholly foreign-owned limited liability company organized under the laws of China.

UDC Ventures LLC, a Delaware limited liability company.

OVJP Corporation, a Delaware corporation.

OLED Material Manufacturing Limited, a private company limited by shares, organized under the laws of Ireland.

Universal Vapor Jet Corporation Pte. Ltd., a private company limited by shares, organized under the laws of Singapore.

UDC Chengdu OLED Technology, Ltd., a wholly foreign-owned limited liability company organized under the laws of China.

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