Form 4 Filing for O'Brien Dana C. - AdvanSix Inc.

On June 22, 2026, Dana C. O'Brien, a director at AdvanSix Inc., was granted 6,207 restricted stock units (RSUs) under the company's 2016 Stock Incentive Plan. These RSUs will vest in full on June 22, 2027. The transaction is reported on Form 4. The shares were acquired at a price of $0.00, with the ownership nature indicated as direct. Following this transaction, O'Brien holds 6,207 shares.