PLPC · Preformed Line Products Co · Insider Trading

The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $406.05 to $412.21, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in the footnotes to this Form 4.

The reported transaction reflects the sale of common shares from the Randall M. Ruhlman Declaration of Trust 1, dated December 10, 2020, of which the reporting person is beneficiary and trustee.

The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $400.00 to $400.45, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in the footnotes to this Form 4.

The reported transaction reflects the sale of common shares from the Randall M. Ruhlman Declaration of Trust 1, dated December 10, 2020, of which the reporting person is beneficiary and trustee.

The reported transaction reflects the sale and transfer of common shares from The Randall M. Ruhlman Declaration of Trust 1, dated December 10, 2020, of which the reporting person is beneficiary and trustee, to the Barbara P. Ruhlman Irrevocable Trust FBO Randall M. Ruhlman, dated August 27, 2024. The transaction was effected at a purchase price equal to the fair market value of the issuer's common shares on the date of transfer, as determined by the closing market price. The transaction constituted an exchange of cash for stock between the two trusts, each of which is administered by Randall M. Ruhlman as trustee and is for the benefit of the reporting person and his descendants and was undertaken for estate planning purposes.

The reported transaction reflects the sale and transfer of common shares from The Randall M. Ruhlman Declaration of Trust 1, dated December 10, 2020, of which the reporting person is beneficiary and trustee, to the Barbara P. Ruhlman Irrevocable Trust FBO Randall M. Ruhlman, dated August 27, 2024. The transaction was effected at a purchase price equal to the fair market value of the issuer's common shares on the date of transfer, as determined by the closing market price. The transaction constituted an exchange of cash for stock between the two trusts, each of which is administered by Randall M. Ruhlman as trustee and is for the benefit of the reporting person and his descendants and was undertaken for estate planning purposes.

On December 11, 2024, the reporting person was granted 7,500 stock options, of which 3,750 vested on December 11, 2025, 1,875 will vest on December 11, 2026, and the remaining 1,875 will vest on December 11, 2027. The expiration date is 10 years from the grant date.

On December 11, 2024, the reporting person was granted 7,500 stock options, of which 3,750 vested on December 11, 2025, 1,875 will vest on December 11, 2026, and the remaining 1,875 will vest on December 11, 2027. The expiration date is 10 years from the grant date.

On June 6, 2026, the reported shares were transferred as a bona fide gift by the reporting person to the Maegan Adams Ruhlman Cross 2025 Generation-Skipping Trust for the benefit of Maegan Adams Ruhlman Cross and her descendants. Maegan Adams Ruhlman Cross serves as Trustee of such trust.

On June 9, 2026, the reported shares were transferred as a bona fide gift from Robert Ruhlman to the Jon Ryan Ruhlman 2025 Generation-Skipping Trust for the benefit of the reporting person and his descendants. Jon Ryan Ruhlman serves as Trustee of such trust.

On June 9, 2026, the reported shares were transferred as a bona fide gift by the reporting person to the Jon Ryan Ruhlman 2025 Generation-Skipping Trust for the benefit of Jon Ryan Ruhlman and his descendants. Jon Ryan Ruhlman serves as Trustee of such trust.

On June 9, 2026, the reported shares were transferred as a bona fide gift to the Maegan Adams Ruhlman Cross 2025 Generation-Skipping Trust for the benefit of the reporting person and her descendants. Maegan Adams Ruhlman Cross is the Trustee of such trust.

The reporting person's actual proportionate interest in the unitized stock fund, Preformed Line Stock fund, equals to 836 Common shares of the Issuer due to the difference between the net asset value per share and the closing stock price of the Common shares on March 12, 2026, as well as the rebalance of the cash position held within the Preformed Line Stock fund.

On December 11, 2024, the reporting person was granted 7,500 stock options, of which 3,750 vested on December 11, 2025, 1,875 will vest on December 11, 2026, and the remaining 1,875 will vest on December 11, 2027. The expiration date is 10 years from the grant date.

On December 11, 2024, the reporting person was granted 7,500 stock options, of which 3,750 vested on December 11, 2025, 1,875 will vest on December 11, 2026, and the remaining 1,875 will vest on December 11, 2027. The expiration date is 10 years from the grant date.

Restricted stock units convert into common stock on a one-for-one basis, based on the achievement of performance goals.

Restricted stock units convert into common stock on a one-for-one basis, based on the achievement of performance goals.

Restricted stock units convert into common stock on a one-for-one basis.

Restricted stock units vest 3 years from the date of grant.

Restricted stock units convert into common stock on a one-for-one basis, based on the achievement of performance goals.

This transaction includes the payment of 1,029 shares to cover the tax withholding for the vesting that occurred on December 31, 2025 with settlement not occurring until February 4, 2026.

This transaction includes the payment of 482 shares to cover the tax withholding for the vesting that occurred on December 31, 2025 with settlement not occurring until February 4, 2026.

This transaction includes the payment of 659 shares to cover the tax withholding for the vesting that occurred on December 31, 2025 with settlement not occurring until February 4, 2026.

Restricted stock units convert into common stock on a one-for-one basis, based on the achievement of performance goals.

This transaction includes the payment of 693 shares to cover the tax withholding for the vesting that occurred on December 31, 2025 with settlement not occurring until February 4, 2026.

Restricted stock units converted into common stock on a one-for-one basis.

Restricted stock units vest 3 years from the date of grant.

This transaction includes the payment of 457 shares to cover the tax withholding for the vesting that occurred on December 31, 2025 with settlement not occurring until February 4, 2026.

Restricted stock units convert into common stock on a one-for-one basis.

Restricted stock units vest 3 years from the date of grant.

Restricted stock units convert into common stock on a one-for-one basis, based on the achievement of performance goals.

Restricted stock units convert into common stock on a one-for-one basis, based on the achievement of performance goals.

This transaction includes the payment of 592 shares to cover the tax withholding for the vesting that occurred on December 31, 2025 with settlement not occurring until February 4, 2026.

Restricted stock units convert into common stock on a one-for-one basis.

Restricted stock units vest 3 years from the date of grant.

Restricted stock units convert into common stock on a one-for-one basis.

Restricted stock units vest 3 years from the date of grant.

This transaction includes the payment of 692 shares to cover the tax withholding for the vesting that occurred on December 31, 2025 with settlement not occurring until February 4, 2026.

Restricted stock units convert into common stock on a one-for-one basis.

Restricted stock units vest 3 years from the date of grant.