Grzebinski David W 4

4 · KIRBY CORP · Filed Feb 5, 2026

AI-generated summary of this filing

Updated Feb 6, 2026

KIRBY (KEX) CEO David Grzebinski Exercises RSUs, Withholds Shares

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.

Form 4

Period: 2026-02-03

DirectorCEO

Transactions

Exercise/Conversion
Common Stock, par value $0.10 per share
[F1]
2026-02-03+22,470→ 107,085 total
Tax Payment
Common Stock, par value $0.10 per share
2026-02-03$120.68/sh−8,844$1,067,294→ 98,241 total
Exercise/Conversion
Restricted Stock Units
[F1][F2]
2026-02-03−6,820→ 6,820 total
→ Common Stock (6,820 underlying)
Exercise/Conversion
Restricted Stock Units
[F1][F3]
2026-02-03−6,572→ 13,144 total
→ Common Stock (6,572 underlying)
Exercise/Conversion
Restricted Stock Units
[F1][F4]
2026-02-03−4,955→ 14,865 total
→ Common Stock (4,955 underlying)
Exercise/Conversion
Restricted Stock Units
[F1][F5]
2026-02-03−4,123→ 16,492 total
→ Common Stock (4,123 underlying)

Footnotes (5)

[F1]Each restricted stock unit represents a contingent right to receive cash or one share of common stock of the issuer.
[F2]These restricted stock units granted on January 28, 2022, vest in five equal annual installments beginning on February 3, 2023. Cash or shares of common stock of the issuer, at the election of the issuer, will be delivered to the reporting person on or as soon as practicable on each vesting date.
[F3]These restricted stock units granted on February 1, 2023, vest in five equal annual installments beginning on February 3, 2024. Cash or shares of common stock of the issuer, at the election of the issuer, will be delivered to the reporting person on or as soon as practicable on each vesting date.
[F4]These restricted stock units granted on February 2, 2024, vest in five equal annual installments beginning on February 3, 2025. Cash or shares of common stock of the issuer, at the election of the issuer, will be delivered to the reporting person on or as soon as practicable on each vesting date.
[F5]These restricted stock units granted on January 31, 2025, vest in five equal annual installments beginning on February 3, 2026. Cash or shares of common stock of the issuer, at the election of the issuer, will be delivered to the reporting person on or as soon as practicable on each vesting date.

Signature

Ronald A. Dragg, Agent and Attorney-in-Fact|2026-02-05

1 file