HUN · Huntsman CORP

The price reported in Column 4 of Line 1 with respect to the 100,000 shares purchased on August 3, 2026 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $9.76 to $9.89 per share. The Reporting Person has provided to the Issuer, and undertakes to provide to any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in Footnote (1) to this Form 4.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Each share of phantom stock represents a right to receive one share of common stock or, at Huntsman Corporation's election, the cash value thereof. The reporting person's shares of phantom stock were settled for shares of common stock.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Each share of phantom stock represents a right to receive one share of common stock or, at Huntsman Corporation's election, the cash value thereof. The reporting person's shares of phantom stock were settled for shares of common stock.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Each share of phantom stock represents a right to receive one share of common stock or, at Huntsman Corporation's election, the cash value thereof. The reporting person's shares of phantom stock were settled for shares of common stock.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon settlement of phantom stock.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon settlement of phantom stock.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon settlement of phantom stock.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Each share of phantom stock represents a right to receive one share of common stock or, at Huntsman Corporation's election, the cash value thereof. The reporting person's shares of phantom stock were settled for shares of common stock.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Shares automatically withheld upon vesting of restricted stock to satisfy tax withholding obligations.

Each share of phantom stock represents a right to receive one share of common stock or, at Huntsman Corporation's election, the cash value thereof. The reporting person's shares of phantom stock were settled for shares of common stock.

Each share of phantom stock represents a right to receive one share of common stock or, at Huntsman Corporation's election, the cash value thereof. The reporting person's shares of phantom stock were settled for shares of common stock.

These shares of restricted stock granted under the Huntsman Corporation 2025 Stock Incentive Plan vest in three equal annual installments beginning February 12, 2027.

These shares of restricted stock granted under the Huntsman Corporation 2025 Stock Incentive Plan vest in three equal annual installments beginning February 12, 2027.

These shares of restricted stock granted under the Huntsman Corporation 2025 Stock Incentive Plan vest in three equal annual installments beginning February 12, 2027.

Each stock unit represents the right to receive one share of Huntsman common stock upon termination of service.

These stock units granted under the Huntsman Corporation 2025 Stock Incentive Plan vest immediately on the date granted. Shares will be delivered to the reporting person upon termination of service with Huntsman.

These shares of restricted stock granted under the Huntsman Corporation 2025 Stock Incentive Plan vest in three equal annual installments beginning February 12, 2027.

Each stock unit represents the right to receive one share of Huntsman common stock upon termination of service.

These stock units granted under the Huntsman Corporation 2025 Stock Incentive Plan vest immediately on the date granted. Shares will be delivered to the reporting person upon termination of service with Huntsman.

These shares of restricted stock granted under the Huntsman Corporation 2025 Stock Incentive Plan vest in three equal annual installments beginning February 12, 2027.

Each stock unit represents the right to receive one share of Huntsman common stock upon termination of service.

These stock units granted under the Huntsman Corporation 2025 Stock Incentive Plan vest immediately on the date granted. Shares will be delivered to the reporting person upon termination of service with Huntsman.

Each stock unit represents the right to receive one share of Huntsman common stock upon termination of service.

These stock units granted under the Huntsman Corporation 2025 Stock Incentive Plan vest immediately on the date granted. Shares will be delivered to the reporting person upon termination of service with Huntsman.

Each stock unit represents the right to receive one share of Huntsman common stock upon termination of service.

These stock units granted under the Huntsman Corporation 2025 Stock Incentive Plan vest immediately on the date granted. Shares will be delivered to the reporting person upon termination of service with Huntsman.

These shares of restricted stock granted under the Huntsman Corporation 2025 Stock Incentive Plan vest in three equal annual installments beginning February 12, 2027.

These shares of restricted stock granted under the Huntsman Corporation 2025 Stock Incentive Plan vest in three equal annual installments beginning February 12, 2027.

These shares of restricted stock granted under the Huntsman Corporation 2025 Stock Incentive Plan vest in three equal annual installments beginning February 12, 2027.