Grzebinski David W 4

What Happened

• David W. Grzebinski, CEO and director of Kirby Corp (KEX), had restricted stock units (RSUs) vest/convert on February 3, 2026. A total of 22,470 shares were issued on conversion. To satisfy tax withholding, 8,844 shares were surrendered at a per-share value of $120.68, totaling $1,067,294. Net shares delivered to Grzebinski were 13,626 (22,470 issued − 8,844 withheld).
• The filing shows the conversion broken into multiple derivative entries (code M) that sum to the 22,470 shares and a withholding entry (code F) for the tax payment. This was a vesting/settlement event rather than an open-market purchase or sale.

Key Details

• Transaction date: February 3, 2026; Filing date: February 5, 2026.
• Converted/issued: 22,470 shares (derivative conversion, code M).
• Withheld for taxes: 8,844 shares at $120.68 each; total value withheld ≈ $1,067,294 (code F).
• Net shares received by insider: 13,626 shares.
• Footnotes: These were restricted stock units (RSUs) from prior grants (grants dated Jan 28, 2022; Feb 1, 2023; Feb 2, 2024; Jan 31, 2025) that vest in annual installments (see filing). RSUs may be settled in cash or shares at the issuer’s election (footnote F1); here shares were issued and shares withheld for taxes.
• Shares owned after the transaction: not specified in this filing.
• Filing appears routine (vesting with tax withholding); no 10b5-1 plan or late filing flag indicated in the provided data.

Context

• This was a vesting/settlement of RSUs (derivative conversion), not an open-market sale or purchase. The use of share withholding to cover taxes is a common, administrative cashless method and does not necessarily signal a change in insider sentiment.