MBRX · Moleculin Biotech, Inc. · Insider Trading

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

Issued in connection with the reporting person's employment with the Company.

The stock option/restricted stock unit set forth in this table vests as follows: (i) 50% on grant; and (ii) 50% in 18 equal installments over 18 months.

Shares withheld for payment of taxes upon vesting of restricted stock unit awards.

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

The stock option/restricted stock unit set forth in this table vests as follows: (i) 50% on grant; and (ii) 50% in 18 equal installments over 18 months.

Each restricted stock unit represents a contingent right to receive one shares of Company common stock.

Issued in connection with the reporting person's employment with the Company.

The stock option set forth in this table vests as follows: (i) 50% on grant; and (ii) 50% in 18 equal installments over 18 months.

Each restricted stock unit represents a contingent right to receive one shares of Company common stock.

Issued in connection with the reporting person's employment with the Company.

The stock option/restricted stock unit set forth in this table vests as follows: (i) 50% on grant; and (ii) 50% in 18 equal installments over 18 months.

Each restricted stock unit represents a contingent right to receive one shares of Company common stock.

Shares withheld for payment of taxes upon vesting of restricted stock unit awards.

The stock option/restricted stock unit set forth in this table vests as follows: (i) 50% on grant; and (ii) 50% in 18 equal installments over 18 months.

Issued in connection with the reporting person's employment with the Company.

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

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

The stock option/restricted stock unit set forth in this table vests as follows: (i) 50% on grant; and (ii) 50% in 18 equal installments over 18 months.

Each restricted stock unit represents a contingent right to receive one shares of Company common stock.

Shares withheld for payment of taxes upon vesting of restricted stock unit awards.

Shares withheld for payment of taxes upon vesting of restricted stock unit awards.

The stock option/restricted stock unit set forth in this table vests as follows: (i) 50% on grant; and (ii) 50% in 18 equal installments over 18 months.

On August 3, 2026, The reporting person acquired 173,333 shares of common stock and Series I warrants to purchase 519,999 shares of common stock at a combined purchase price of $0.75 per one share of common stock and three accompanying warrants in a public offering.

On August 3, 2026, the reporting person acquired 533,333 shares of common stock and Series I warrants to purchase 1,599,999 shares of common stock at a combined purchase price of $0.75 per one share of common stock and three accompanying warrants in a public offering.

On August 3, 2026, The reporting person acquired 173,333 shares of common stock and Series I warrants to purchase 519,999 shares of common stock at a combined purchase price of $0.75 per one share of common stock and three accompanying warrants in a public offering.

On August 3, 2026, the reporting person acquired 293,333 shares of common stock and Series I warrants to purchase 879,999 shares of common stock at a combined purchase price of $0.75 per one share of common stock and three accompanying warrants in a public offering.

On August 3, 2026, the reporting person acquired 293,333 shares of common stock and Series I warrants to purchase 879,999 shares of common stock at a combined purchase price of $0.75 per one share of common stock and three accompanying warrants in a public offering.

On August 3, 2026, the reporting person acquired 533,333 shares of common stock and Series I warrants to purchase 1,599,999 shares of common stock at a combined purchase price of $0.75 per one share of common stock and three accompanying warrants in a public offering.

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

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

On June 22, 2023, the reporting person was granted 1,439 restricted stock units, vesting in four equal annual installments beginning on the first anniversary of the grant date.

Includes 250,002 shares of common stock underlying Series E warrants to purchase common stock.

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

On June 22, 2023, the reporting person was granted 693 restricted stock units, vesting in four equal annual installments beginning on the first anniversary of the grant date.

Includes 100,003 shares of common stock underlying Series E warrants to purchase common stock.

Shares withheld for payment of taxes upon vesting of restricted stock unit awards.

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

On June 22, 2023, the reporting person was granted 283 restricted stock units, vesting in four equal annual installments beginning on the first anniversary of the grant date.

Shares withheld for payment of taxes upon vesting of restricted stock unit awards.

Shares withheld for payment of taxes upon vesting of restricted stock unit awards.

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

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

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

On June 20, 2022, the reporting person was granted 434 restricted stock units, vesting in four equal annual installments beginning on the first anniversary of the grant date.

Includes 100,003 shares of common stock underlying Series E warrants to purchase common stock.

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

On June 20, 2022, the reporting person was granted 600 restricted stock units, vesting in four equal annual installments beginning on the first anniversary of the grant date.

Includes 250,002 shares of common stock underlying Series E warrants to purchase common stock.

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

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

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

On June 20, 2022, the reporting person was granted 173 restricted stock units, vesting in four equal annual installments beginning on the first anniversary of the grant date.

Shares withheld for payment of taxes upon vesting of restricted stock unit awards.

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

Shares withheld for payment of taxes upon vesting of restricted stock unit awards.

Shares withheld for payment of taxes upon vesting of restricted stock unit awards.

Each restricted stock unit represents a contingent right to receive one shares of Company common stock.

Issued in connection with the reporting person's employment with the Company.

On November 12, 2025, the Board approved this performance based restricted stock unit. The performance based restricted stock units set forth in this table will vest in 20% installments upon the achievement of certain clinical milestones; provided that upon a change of control (as defined in the 2024 Stock Plan) 100% shall vest.

Each restricted stock unit represents a contingent right to receive one shares of Company common stock.

Issued in connection with the reporting person's employment with the Company.

On November 12, 2025, the Board approved this performance based restricted stock unit. The performance based restricted stock units set forth in this table will vest in 20% installments upon the achievement of certain clinical milestones; provided that upon a change of control (as defined in the 2024 Stock Plan) 100% shall vest.

Issued in connection with the reporting person's employment with the Company.

The stock option set forth in this table vests in four equal annual installments beginning on the first anniversary of the Transaction Date, subject to the grantee's continued service to the Company on each vesting date.

Each restricted stock unit represents a contingent right to receive one shares of Company common stock.

Issued in connection with the reporting person's employment with the Company.

On November 12, 2025, the Board approved this performance based restricted stock unit. The performance based restricted stock units set forth in this table will vest in 20% installments upon the achievement of certain clinical milestones; provided that upon a change of control (as defined in the 2024 Stock Plan) 100% shall vest.

The options were issued in connection with the reporting person's Board of Director service to the Company.

The options set forth in this table vest on November 12, 2026, subject to the grantee's continued service on the Company's Board of Directors on each vesting date.

Issued in connection with the reporting person's employment with the Company.

The stock option set forth in this table vests in four equal annual installments beginning on the first anniversary of the Transaction Date, subject to the grantee's continued service to the Company on each vesting date.

The options were issued in connection with the reporting person's Board of Director service to the Company.

The options set forth in this table vest on November 12, 2026, subject to the grantee's continued service on the Company's Board of Directors on each vesting date.

The options were issued in connection with the reporting person's Board of Director service to the Company.

The options set forth in this table vest on November 12, 2026, subject to the grantee's continued service on the Company's Board of Directors on each vesting date.

Issued in connection with the reporting person's employment with the Company.

The stock option set forth in this table vests in four equal annual installments beginning on the first anniversary of the Transaction Date, subject to the grantee's continued service to the Company on each vesting date.

The options were issued in connection with the reporting person's Board of Director service to the Company.

The options set forth in this table vest on November 12, 2026, subject to the grantee's continued service on the Company's Board of Directors on each vesting date.

The options were issued in connection with the reporting person's Board of Director service to the Company.

The options set forth in this table vest on November 12, 2026, subject to the grantee's continued service on the Company's Board of Directors on each vesting date.

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

On November 4, 2024, the reporting person was granted 115,000 restricted stock units, vesting in four equal annual installments beginning on the first anniversary of the grant date.

Shares withheld for payment of taxes upon vesting of restricted stock unit awards.

Shares withheld for payment of taxes upon vesting of restricted stock unit awards.

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