MILLER SCOTT P 4

4 · KIRBY CORP · Filed Feb 5, 2026

AI-generated summary of this filing

Updated Feb 6, 2026

Kirby (KEX) VP‑CIO Scott Miller Exercises RSUs, Withholds Shares

What Happened

Scott P. Miller, Vice President and Chief Investment Officer of Kirby Corp (KEX), had restricted stock units (RSUs) vest and was credited with 5,375 shares on February 3, 2026 (reported Feb 5, 2026). Of those, 1,311 shares were surrendered to cover tax withholding at $120.68 per share, totaling $158,211. The filing shows the RSU conversion/exercise (code M) and the tax withholding disposition (code F). No open‑market sale for cash other than the shares withheld for taxes was reported.

Key Details

Transaction date: 2026-02-03; filing date: 2026-02-05 (timely).
RSU conversion: 5,375 shares reported as exercised/converted (code M, acquired).
Tax withholding: 1,311 shares disposed to cover taxes at $120.68/share → $158,211 (code F).
Other listed M dispositions (1,591; 1,664; 1,433; 687) reflect the RSU settlement entries tied to the conversion (totaling 5,375) and are reported at $0 per share in the filing.
Shares owned after the transaction are not specified in the excerpt provided.
Footnotes: These shares arise from RSU grants made in 2022–2025 that vest in five equal annual installments (see F1–F5). The company may deliver cash or shares at vesting.

Context

This was a routine RSU vesting and settlement, not an open‑market sale by the insider; the tax‑withholding surrender is common practice (cashless/net settlement). Code legend: M = exercise/conversion of a derivative (RSU), F = shares used to pay tax withholding. Such vesting events reflect compensation realization rather than an expressed buy/sell market view.

Form 4

Period: 2026-02-03

VP - CIO

Transactions

Exercise/Conversion
Common Stock, par value $0.10 per share
[F1]
2026-02-03+5,375→ 8,836 total
Tax Payment
Common Stock, par value $0.10 per share
2026-02-03$120.68/sh−1,311$158,211→ 7,525 total
Exercise/Conversion
Restricted Stock Units
[F1][F2]
2026-02-03−1,591→ 1,591 total
→ Common Stock (1,591 underlying)
Exercise/Conversion
Restricted Stock Units
[F1][F3]
2026-02-03−1,664→ 3,328 total
→ Common Stock (1,664 underlying)
Exercise/Conversion
Restricted Stock Units
[F1][F4]
2026-02-03−1,433→ 4,299 total
→ Common Stock (1,433 underlying)
Exercise/Conversion
Restricted Stock Units
[F1][F5]
2026-02-03−687→ 2,748 total
→ Common Stock (687 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