GIBSON LEE R 4

What Happened

• Lee R. Gibson, a director of Southside Bancshares, had 4,082 performance-based restricted stock units (PSUs) settle on March 17, 2026 (recorded as an award). No cash was paid to acquire these shares (code A).
• To satisfy tax withholding related to the PSU settlement, 993 shares were disposed (withheld) at $29.94 per share, generating proceeds of $29,730 (code F). This is a routine tax-withholding step following equity vesting, not an open-market sale.

Key Details

• Transaction dates: March 17, 2026 (period of report); Form 4 filed March 18, 2026 (timely).
• Awarded/Acquired: 4,082 shares (Grant/settlement of PSUs) at $0.00 per share (code A).
• Withheld/Disposed: 993 shares at $29.94 per share for tax withholding, total $29,730 (code F).
• Footnote: These shares reflect settlement of PSUs granted on February 2, 2023, earned based on ROATCE performance goals and the reporting person's continued employment.
• Shares owned after the transaction: not specified in the provided excerpt of the filing.
• No indication of a 10b5-1 plan or late filing in this report.

Context

• This was a vesting/settlement of performance-based equity, not a purchase or a voluntary sale by the director. The 993-share disposition was a tax withholding (common when equity grants vest) rather than a market-directed sale.
• For retail investors, vesting and related withholding are routine compensation events and do not by themselves signal the insider’s view of the company’s prospects.