Gramm Christopher plan to sell securities of AdvanSix Inc. under Form 144

Gramm Christopher filed Form 144 to notify SEC of plan to sell 2000 units of AdvanSix Inc. securities around 2026-06-10, with aggregate market value of $42,800.00. The total outstanding units is 26959036.0. The amount planned to be sold represents 0.01% of total outstanding units; Recent transactions in past 3 months include: On 05/13/2026, sold 2000 units for $45090.00;