SEACOR Marine Holdings Inc. has 9 Schedule 13D or 13G filings on record since 2025-07-29. 2 holders' latest filing reports 5% or more of common stock, par value $.01 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Chernett Jorey | 7.19% | 1,946,963 | SCHEDULE 13D, 2026-06-22 | 2026-06-22 |
| Carl K. Oppenheimer | 5.1% | 1,383,792 | SCHEDULE 13G, 2026-08-11 | 2026-06-30 |
| Dimensional Fund Advisors LP | 4.8% | 1,284,004 | SCHEDULE 13G/A, 2026-01-21 | 2025-12-31 |
| The Vanguard Group | 4.57% | 1,235,033 | SCHEDULE 13G/A, 2025-10-30 | 2025-09-30 |
Purpose of Transaction (Item 4)
Chernett Jorey
The Reporting Person purchased the Shares based on the Reporting Person's belief that the Shares, when purchased, were undervalued and represented an attractive investment opportunity. Depending upon overall market conditions, other investment opportunities available to the Reporting Person, and the availability of Shares at prices that would make the purchase or sale of Shares desirable, the Reporting Person may endeavor to further increase or decrease his position in the Issuer through, among other things, the purchase or sale of Shares on the open market or in private transactions or otherwise, on such terms and at such times as the Reporting Person may deem advisable. The Reporting Person does not have any present plan or proposal which would relate to or result in any of the matters set forth in subparagraphs (a) - (j) of Item 4 of Schedule 13D except as set forth herein or such as would occur upon or in connection with completion of, or following, any of the actions discussed herein. The Reporting Person intends to review his investment in the Issuer on a continuing basis. Depending on various factors including, without limitation, the Issuer's financial position and investment strategy, the price levels of the Shares, conditions in the securities markets and general economic and industry conditions, the Reporting Person may in the future take such actions with respect to his investment in the Issuer as he deems appropriate including, without limitation, engaging in …The first part of Item 4 of the SCHEDULE 13D filed 2026-06-22; the filing has the rest
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-29 | The Vanguard Group | 5.03% | SCHEDULE 13G |
| 2025-10-30 | The Vanguard Group | 4.57% | SCHEDULE 13G/A |
| 2025-11-14 | Chernett Jorey | 4.5% | SCHEDULE 13G/A |
| 2025-12-31 | Chernett Jorey | 5.2% | SCHEDULE 13G |
| 2026-01-21 | Dimensional Fund Advisors LP | 4.8% | SCHEDULE 13G/A |
| 2026-04-21 | Carl K. Oppenheimer | 5.24% | SCHEDULE 13G |
| 2026-05-20 | Chernett Jorey | 6.9% | SCHEDULE 13G/A |
| 2026-06-22 | Chernett Jorey | 7.19% | SCHEDULE 13D |
| 2026-08-11 | Carl K. Oppenheimer | 5.1% | SCHEDULE 13G |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.