PLAB · Photronics Inc

These shares were sold in multiple transactions at prices ranging from $47.58 - $47.95. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request.

These shares were sold in multiple transactions at prices ranging from $46.04 - $46.09. The price reported is a weighted average. The reporting person undertakes to provide, upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares sold at each separate price within the range.

These shares were sold in multiple transactions at prices ranging from $45.22 - $45.45. The price reported is a weighted average. The reporting person undertakes to provide, upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares sold at each separate price within the range.

The reported options vested in four equal annual installments, with 25% vested on each of the first four anniversaries of the grant date, January 2nd, 2019.

Represents restricted stock units granted pursuant to the Company's 2025 Equity Incentive Compensation Plan, vesting 25% on July 8, 2026, 25% on October 8, 2026, 25% on January 8, 2027, and 25% on April 8, 2027.

Represents restricted stock units granted pursuant to the Company's 2025 Equity Incentive Compensation Plan, vesting 25% on July 8, 2026, 25% on October 8, 2026, 25% on January 8, 2027, and 25% on April 8, 2027.

The reported options vested in four equal annual installments, with 25% vested on each of the first four anniversaries of the grant date, January 2nd, 2018.

Represents restricted stock units granted pursuant to the Company's 2025 Equity Incentive Compensation Plan, vesting 25% on July 8, 2026, 25% on October 8, 2026, 25% on January 8, 2027, and 25% on April 8, 2027.

Represents restricted stock units granted pursuant to the Company's 2025 Equity Incentive Compensation Plan, vesting 25% on July 8, 2026, 25% on October 8, 2026, 25% on January 8, 2027, and 25% on April 8, 2027.

Represents restricted stock units granted pursuant to the Company's 2025 Equity Incentive Compensation Plan, vesting 25% on July 8, 2026, 25% on October 8, 2026, 25% on January 8, 2027, and 25% on April 8, 2027.

Represents restricted stock units granted pursuant to the Company's 2025 Equity Incentive Compensation Plan, vesting 25% on July 8, 2026, 25% on October 8, 2026, 25% on January 8, 2027, and 25% on April 8, 2027.

The reported options vested in four equal annual installments, with 25% vested on each of the first four anniversaries of the grant date, January 2nd, 2018.

These shares were sold in multiple transactions at prices ranging from $44.21 - $44.36. The price reported is a weighted average. The reporting person undertakes to provide, upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares sold at each separate price within the range.

These shares were sold in multiple transactions at prices ranging from $42.66 - $42.75. The price reported is a weighted average. The reporting person undertakes to provide, upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares sold at each separate price within the range.

The reported options vested in four equal annual installments, with 25% vested on each of the first four anniversaries of the grant date, January 2nd, 2018.

The reported options vested in four equal annual installments, with 25% vested on each of the first four anniversaries of the grant date, January 2nd, 2018.

Gift to Macricostas Family Foundation.

Gift to Macricostas Family Foundation.

The reported options vested in four equal annual installments, with 25% vested on each of the first four anniversaries of the grant date, March 7, 2017.

These shares were sold in multiple transactions at prices ranging from $42.28 - $42.45. The price reported is a weighted average. The reporting person undertakes to provide, upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares sold at each separate price within the range.

The reported options vested in four equal annual installments, with 25% vested on each of the first four anniversaries of the grant date, March 7, 2017.

This Form 4 is being filed to report a new transaction and to correct the filer's beneficial ownership totals reported in the prior two Form 4 filings. The filer's beneficial ownership was 405,850 shares following the reported transaction on 01/16/2026 and 395,850 shares following the reported transaction on 03/19/2026. The previously reported transaction information was otherwise accurate.

These shares were sold in multiple transactions at prices ranging from $35.80 - $35.83. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request.