PPIH · Perma-Pipe International Holdings, Inc.

The shares of common stock reported as disposed herein were withheld by the issuer to satisfy tax withholding obligations arising upon the vesting of restricted stock.

The shares of common stock reported as disposed herein were withheld by the issuer to satisfy tax withholding obligations arising upon the vesting of restricted stock.

Restricted shares that vest on the first anniversary of the grant date.

Restricted shares that vest 1/3 on each of the first three anniversaries of the grant date.

Restricted shares that vest on the first anniversary of the grant date.

Restricted shares that vest on the first anniversary of the grant date.

Restricted shares that vest on the first anniversary of the grant date.

Restricted shares that vest 1/3 on each of the first three anniversaries of the grant date.

This Form 4/A is being filed solely to correct a typographical error in Box 2 of Table I, which incorrectly reported the transaction date as June 22, 2025. The correct transaction date is June 22, 2026. No other information reported in the original Form 4 filed on June 23, 2026 has been changed.

The shares of common stock reported as disposed herein were withheld by the issuer to satisfy tax withholding obligations arising upon the vesting of restricted stock.

Initial grant of shares as compensation for services as independent director.

The shares of common stock underlying the restricted stock reported as disposed herein were withheld by the issuer in satisfaction of tax withholding obligations associated with the vesting of restricted stock.

Amending previous Form 4 to show amended tax withholding.

The shares of common stock underlying the restricted stock reported as disposed herein were withheld by the issuer in satisfaction of tax withholding obligations associated with the vesting of restricted stock.

Restricted shares that vest on the first anniversary of the grant date.

Restricted shares that vest on the first anniversary of the grant date.

Restricted shares that vest 1/3 on each of the first three anniversaries of the grant date.

Restricted shares that vest 1/3 on each of the first three anniversaries of the grant date.

Restricted shares that vest on the first anniversary of the grant date.

Restricted shares that vest on the first anniversary of the grant date.

This amendment corrects an error in Column 5 of Table I, where the number of shares was reported incorrectly on June 26, 2025 to report a transaction that occurred on June 24, 2026. The original Form 4 reported that the securities owned by the reporting person is 11,954 but the correct number of shares held is 10,588. Pursuant to Instruction 9(b) to Form 4, only the lines to the original Form 4 requiring correction or amendment are being restated on this amended Form 4.

The shares of common stock reported herein were sold pursuant to a Rule 10b5-1 plan. The sale of these shares are to cover the estimated taxes associated with the vesting of restricted stock.

The shares of common stock reported as sold herein were sold under a Rule 10b5-1 plan. The sale of these shares are to cover the estimated taxes associated with the vesting of restricted stock.

The shares of common stock reported herein were sold pursuant to a Rule 10b5-1 plan. The sale of these shares are to cover the estimated taxes associated with the vesting of restricted stock.

The shares of common stock reported herein were sold pursuant to a Rule 10b5-1 plan. The sale of these shares are to cover the estimated taxes associated with the vesting of restricted stock.

The shares of common stock reported herein were sold pursuant to a Rule 10b5-1 plan. The sale of these shares are to cover the estimated taxes associated with the vesting of restricted stock.

The shares of common stock reported as sold herein were sold under a Rule 10b5-1 plan. The sale of these shares are to cover the estimated taxes associated with the vesting of restricted stock.

The shares of common stock reported herein were sold pursuant to a Rule 10b5-1 plan. The sale of these shares are to cover the estimated taxes associated with the vesting of restricted stock.

The shares of common stock reported as sold herein were sold under a Rule 10b5-1 plan. The sale of these shares are to cover the estimated taxes associated with the vesting of restricted stock.

The shares of common stock reported herein were sold pursuant to a Rule 10b5-1 plan. The sale of these shares are to cover the estimated taxes associated with the vesting of restricted stock.

Restricted shares that vest on the first anniversary of the grant date

Restricted shares that vest on the first anniversary of the grant date

Restricted shares that vest on the first anniversary of the grant date

Restricted shares that vest on the first anniversary of the grant date

Restricted shares that vest on the first anniversary of the grant date

The shares of common stock reported herein were sold pursuant to Rule 10b5-1 plan effective as of December 24, 2021. The sale of these shares are to cover the estimated taxes associated with the vesting of restricted stock.

The shares of common stock reported herein were sold pursuant to Rule 10b5-1 plan effective as of December 24, 2021. The sale of these shares are to cover the estimated taxes associated with the vesting of restricted stock.

The shares of common stock underlying the restricted stock reported as disposed herein were withheld by the issuer in satisfaction of tax withholding obligations associated with the vesting of restricted stock.

The shares of common stock underlying the restricted stock reported as disposed herein were withheld by the issuer in satisfaction of tax withholding obligations associated with the vesting of restricted stock.

The shares of common stock underlying the restricted stock reported as disposed herein were withheld by the issuer in satisfaction of tax withholding obligations associated with the vesting of restricted stock.

The shares of common stock reported herein were sold pursuant to Rule 10b5-1 plan effective as of December 24, 2021. The sale of these shares are to cover the estimated taxes associated with the vesting of restricted stock.

The shares of common stock reported herein were sold pursuant to Rule 10b5-1 plan effective as of December 24, 2021. The sale of these shares are to cover the estimated taxes associated with the vesting of restricted stock.

The shares of common stock reported herein were sold pursuant to Rule 10b5-1 plan effective as of December 24, 2021. The sale of these shares are to cover the estimated taxes associated with the vesting of restricted stock.

The shares of common stock reported herein were sold pursuant to Rule 10b5-1 plan effective as of December 24, 2021. The sale of these shares are to cover the estimated taxes associated with the vesting of restricted stock.

The shares of common stock reported herein were sold pursuant to Rule 10b5-1 plan effective as of December 24, 2021. The sale of these shares are to cover the estimated taxes associated with the vesting of restricted stock.

The shares of common stock reported herein were sold pursuant to Rule 10b5-1 plan effective as of December 24, 2021. The sale of these shares are to cover the estimated taxes associated with the vesting of restricted stock.