Rossmiller Gregory Scott 4

4 · SEACOR Marine Holdings Inc. · Filed Mar 10, 2026

AI-generated summary of this filing

Updated Mar 10, 2026

SEACOR Marine (SMHI) SVP Gregory Rossmiller Receives 3,719 Shares

What Happened

Gregory Scott Rossmiller, SVP & CAO of SEACOR Marine Holdings (SMHI), had one tranche of performance RSUs (PRSUs) vest and convert into 3,719 shares of common stock on 2026-03-07. To cover tax withholding, 1,464 of those shares were surrendered at $7.31 per share (total ~$10,702). Net shares retained by Rossmiller from this conversion: 2,255.

Key Details

Transaction date: 2026-03-07; Form 4 filed: 2026-03-10 (appears timely).
Award conversion: 3,719 shares issued from PRSUs (conversion = one-for-one per footnote).
Tax withholding: 1,464 shares withheld at $7.31/share = $10,702.
Net shares retained: 2,255.
Footnotes: These shares came from a 3/7/2023 grant of 18,595 PRSUs in five price-based tranches; one tranche’s performance and service conditions were met by 3/7/26 and issued; the remaining PRSUs were forfeited.
Transaction codes explained: M = conversion/exercise of a derivative award (PRSUs converting to common stock); F = shares withheld to satisfy tax liability.

Context

This was not a market purchase or an open-market sale by the insider; it was the settlement of performance-based restricted stock units into shares, with routine withholding to cover taxes. Such conversions are common when defined performance and service conditions are met and do not by themselves indicate a buy/sell signal.

Form 4

Period: 2026-03-07

SVP & CAO

Transactions

Exercise/Conversion
Common Stock
[F1]
2026-03-07+3,719→ 296,205 total
Tax Payment
Common Stock
2026-03-07$7.31/sh−1,464$10,702→ 294,741 total
Exercise/Conversion
Performance Restricted Stock Units
[F1][F2]
2026-03-07−3,719→ 0 total
From: 2026-03-07Exp: 2026-03-07→ Common Stock (3,719 underlying)

Footnotes (2)

[F1]Performance restricted stock units ("PRSUs") convert into shares of Common Stock on a one-for-one basis.
[F2]On 3/7/23, the Reporting Person was granted 18,595 PRSUs ("2023 PRSUs") consisting of five equal tranches, each of which would be earned if and when the closing price of one share of Common Stock equals or exceeds the specified stock price performance goal for such tranche for 60 consecutive trading days during the three year performance period beginning on the grant date, provided that any earned PRSUs would not be settled until the third anniversary of the grant date, subject to satisfaction of the service-based vesting requirements set forth in the award agreement. The specified stock price performance goals for each tranche were $11.61, $13.21, $14.91, $16.62 and $18.22, respectively. The service-based vesting requirements and one of the specified stock price performance goals were satisfied during the performance period ending 3/7/26, and the shares of Common Stock were issued at such date with respect to one tranche of the 2023 PRSUs. The remaining 2023 PRSUs were forfeited.

Signature

/s/ Andrew H. Everett II, Attorney-in-Fact|2026-03-10

1 file