1. Grant of restricted stock units pursuant to the 2016 Stock Incentive Plan of AdvanSix Inc. and its Affiliates, as Amended and Restated, which will vest in full on June 18, 2026.

2. Includes an additional 76 shares representing stock units credited as dividend equivalents in connection with unvested restricted stock units under the 2016 Stock Incentive Plan of AdvanSix Inc. and its Affiliates, as amended and restated, and deferred stock units under the AdvanSix Inc. Deferred Compensation Plan, which were acquired in transactions exempt from reporting under Rule 16a-11.