X0306 4 2020-08-10 0 0001690334 SEACOR Marine Holdings Inc. SMHI 0001292966 Gellert John M C/O SEACOR MARINE HOLDINGS INC. 12121 WICKCHESTER LANE, SUITE 500 HOUSTON TX 77079 1 1 0 0 President and CEO Common Stock 2020-08-10 4 P 0 27000 2.9004 A 223885 D Common Stock 95158 I JMG GST LLC Common Stock 86756 I JMG Assets, LLC Common Stock 38803 I Grantor Retained Annuity Trust The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.69 to $3.00, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote to this Form 4. The shares reported here are indirectly owned by the Reporting Person through JMG GST LLC. The Reporting Person is the Manager of JMG GST LLC. The shares reported here are indirectly owned by the Reporting Person through JMG Assets, LLC. The Reporting Person is the Manager of JMG Assets, LLC. /s/ Andrew H. Everett II, Attorney-in-Fact 2020-08-12