OLED · Universal Display Corp \Pa\ · Insider Trading

Represents the weighted average of a range of sale prices from $84.32 to $85.24. The Reporting Person undertakes to provide to the staff of Securities and Exchange Commission, the Company or any shareholder of the Company, upon request, full information regarding the number of shares sold at each separate price.

Reflects the annuity distribution on April 30, 2026 of 392 shares by the Grantor Retained Annuity Trust to the Reporting Person.

Represents the weighted average of a range of purchase prices from $94.04 to $94.77. The Reporting Person undertakes to provide to the staff of Securities and Exchange Commission, the Company or any shareholder of the Company, upon request, full information regarding the number of shares purchased at each separate price.

Represents the weighted average of a range of purchase prices from $94.18 to $94.64. The Reporting Person undertakes to provide to the staff of Securities and Exchange Commission, the Company or any shareholder of the Company, upon request, full information regarding the number of shares purchased at each separate price.

Represents the weighted average of a range of purchase prices from $93.14 to $94.08. The Reporting Person undertakes to provide to the staff of Securities and Exchange Commission, the Company or any shareholder of the Company, upon request, full information regarding the number of shares purchased at each separate price.

Represents the weighted average of a range of purchase prices from $92.05 to $92.95. The Reporting Person undertakes to provide to the staff of Securities and Exchange Commission, the Company or any shareholder of the Company, upon request, full information regarding the number of shares purchased at each separate price.

Includes 132 shares acquired under the Universal Display Corporation Employee Stock Purchase Plan on March 31, 2026.

Represents the weighted average of a range of purchase prices from $91.99 to $92.97. The Reporting Person undertakes to provide to the staff of Securities and Exchange Commission, the Company or any shareholder of the Company, upon request, full information regarding the number of shares purchased at each separate price.

Includes 134 shares acquired under the Universal Display Corporation Employee Stock Purchase Plan on March 31, 2026.

Represents the weighted average of a range of purchase prices from $93.00 to $93.99. The Reporting Person undertakes to provide to the staff of Securities and Exchange Commission, the Company or any shareholder of the Company, upon request, full information regarding the number of shares purchased at each separate price.

Includes 3.872 shares purchased through dividend reinvestment.

These shares were withheld to satisfy a tax liability in connection with the vesting on March 7, 2026 of 3,375 shares of restricted stock previously granted to the Reporting Person.

These shares were withheld to satisfy a tax liability in connection with the vesting on March 7, 2026 of 5,987 shares of restricted stock previously granted to the Reporting Person.

These shares were granted to the Reporting Person as performance units under the Company's Long Term Incentive Plan as part of 2023 compensation and vested on March 7, 2026 subject to the satisfaction of certain performance conditions, which the Company's Human Capital Committee certified on February 17, 2026 as having occurred.

These shares were granted to the Reporting Person as performance units under the Company's Long Term Incentive Plan as part of 2023 compensation and vested on March 7, 2026 subject to the satisfaction of certain performance conditions, which the Company's Human Capital Committee certified on February 17, 2026 as having occurred.

These shares were withheld to satisfy a tax liability in connection with the vesting on March 7, 2026 of 1,497 shares of restricted stock previously granted to the Reporting Person.

These shares were granted to the Reporting Person as performance units under the Company's Long Term Incentive Plan as part of 2023 compensation and vested on March 7, 2026 subject to the satisfaction of certain performance conditions, which the Company's Human Capital Committee certified on February 17, 2026 as having occurred.

These shares were granted to the Reporting Person as performance units under the Company's Long Term Incentive Plan as part of 2023 compensation and vested on March 7, 2026 subject to the satisfaction of certain performance conditions, which the Company's Human Capital Committee certified on February 17, 2026 as having occurred.