Ryan Rachael E 4

What Happened
Rachael E. Ryan, VP and Controller of AdvanSix (ASIX), had 2,074 shares withheld to satisfy tax withholding related to Restricted Stock Units that vested on March 24, 2026. The withheld shares were valued at $22.02 each for a total disposition of approximately $45,669. This was a tax-withholding disposition (code F), not an open-market sale.

Key Details

• Transaction date: March 24, 2026
• Filing date: March 26, 2026 (filed within the typical two-business-day Form 4 window)
• Transaction type/code: Payment of tax liability via share withholding (F)
• Shares withheld/disposed: 2,074 at $22.02 each — total ~$45,669
• Footnote: Shares withheld to satisfy tax withholding obligations related to RSUs that vested on March 24, 2026 (F1)
• Shares owned after transaction: Not disclosed in this filing

Context
Tax-withholding by withholding or surrendering vested RSU shares is a routine administrative action to cover an insider’s tax obligation and does not by itself indicate a change in the insider’s view of the company. This was not a market sale or purchase — the company retained the shares to pay withholding taxes.