As of November 6, 2026, 2 holders' latest Schedule 13D or 13G filings report owning 5% or more of Marinemax Inc. The largest reported stake is BlackRock, Inc.'s, at 13.7%. 12 filings are on record since July 18, 2025 (Schedule 13G/A, July 18, 2025).
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Key facts
- · Reporting person: Emma Omega Ltd · Sole voting: 0 · Shared voting: 1,343,635 · Sole dispositive: 0 · Shared dispositive: 1,343,635 · SCHEDULE 13G, 2026-09-21
- · Reporting person: Renata Kellnerova · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13D/A, 2026-09-21
- · Holder: PPF Group a.s. · Percent: 6.1% · SCHEDULE 13D/A
- · Reporting person: American Century Investment Management, Inc. · Sole voting: 927,757 · Shared voting: 0 · Sole dispositive: 943,128 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-09-04
- · Holder: PPF Group a.s. · Percent: 8.1% · SCHEDULE 13D/A
Marinemax Inc has 12 Schedule 13D or 13G filings on record since 2025-07-18. 2 holders' latest filing reports 5% or more of common stock, par value $0.001 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| BlackRock, Inc. | 13.7% | 2,951,576 | SCHEDULE 13G/A, 2025-07-18 | 2025-06-30 |
| Emma Omega Ltd | 6.1% | 1,343,635 | SCHEDULE 13G, 2026-09-21 | 2026-09-18 |
| Dimensional Fund Advisors LP | 4.8% | 1,044,643 | SCHEDULE 13G/A, 2026-01-21 | 2025-12-31 |
| American Century Investment Management, Inc. | 4.3% | 943,128 | SCHEDULE 13G/A, 2026-09-04 | 2026-08-31 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-27 | 2026-03-13 |
| PPF Group a.s. | 0% | 0 | SCHEDULE 13D/A, 2026-09-21 | 2026-09-18 |
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More on Marinemax Inc and the records around it.
Marinemax Inc elsewhere on the record
Companies that share a holder
- Renata Kellnerova also filed stake reports on 2 other companies: Autolus Therapeutics plc (Aug 2026), MDA Space Ltd. (May 2026)
- American Century Capital Portfolios, Inc. also filed stake reports on 83 other companies: Visteon Corporation (Oct 2026), AdvanSix Inc. (Aug 2026), Allegiant Travel Company (Aug 2026)
- Dimensional Fund Advisors LP also filed stake reports on 366 other companies: Acadia Healthcare Co Inc (Oct 2026), ADT Inc (Oct 2026), AGCO Corp (Oct 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Emma Omega Ltd | 0 | 1,343,635 | 0 | 1,343,635 | SCHEDULE 13G, 2026-09-21 |
| Juvo Holding Ltd | 0 | 1,343,635 | 0 | 1,343,635 | SCHEDULE 13G, 2026-09-21 |
| Matsuba Limited | 1,343,635 | 1,343,635 | 1,343,635 | 1,343,635 | SCHEDULE 13G, 2026-09-21 |
| Jiri Smejc | 0 | 1,343,635 | 0 | 1,343,635 | SCHEDULE 13G, 2026-09-21 |
| American Century Investment Management, Inc. | 927,757 | 0 | 943,128 | 0 | SCHEDULE 13G/A, 2026-09-04 |
| American Century Companies, Inc. | 927,757 | 0 | 943,128 | 0 | SCHEDULE 13G/A, 2026-09-04 |
| Stowers Institute for Medical Research | 927,757 | 0 | 943,128 | 0 | SCHEDULE 13G/A, 2026-09-04 |
| Renata Kellnerova | 0 | 0 | 0 | 0 | SCHEDULE 13D/A, 2026-09-21 |
| AMALAR HOLDING s.r.o. | 0 | 0 | 0 | 0 | SCHEDULE 13D/A, 2026-09-21 |
| PPF Group a.s. | 0 | 0 | 0 | 0 | SCHEDULE 13D/A, 2026-09-21 |
| Vox Ventures B.V. | 0 | 0 | 0 | 0 | SCHEDULE 13D/A, 2026-09-21 |
The latest filing identifies Marinemax Inc by CUSIP 567908108 and gives its principal executive office as 501 Brooker Creek Boulevard, Oldsmar, FL 34677 (SCHEDULE 13G, 2026-09-21).
Purpose of Transaction (Item 4)
PPF Group a.s.
Item 4 of the Schedule 13D is hereby amended and supplemented to include the following: On September 18, 2026, the Reporting Persons divested of Matsuba Limited, a company organized under the laws of Cyprus ("Matsuba"), in a negotiated sale to an unaffiliated third party. As previously reported on the Schedule 13D, Matsuba is the direct holder of the shares of Common Stock, and prior to the divestiture, was a wholly-owned subsidiary of Vox Ventures. As a result, as of the date of this Amendment No. 6 to the Schedule 13D, the Reporting Persons do not beneficially own any shares of Common Stock of the Issuer.Item 4 of the SCHEDULE 13D/A filed 2026-09-21
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-18 | BlackRock, Inc. | 13.7% | SCHEDULE 13G/A |
| 2025-08-14 | American Century Investment Management, Inc. | 11.3% | SCHEDULE 13G/A |
| 2026-01-08 | American Century Investment Management, Inc. | 9.9% | SCHEDULE 13G/A |
| 2026-01-21 | Dimensional Fund Advisors LP | 4.8% | SCHEDULE 13G/A |
| 2026-03-27 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-05-01 | American Century Investment Management, Inc. | 9.6% | SCHEDULE 13G/A |
| 2026-06-05 | American Century Investment Management, Inc. | 10.3% | SCHEDULE 13G/A |
| 2026-08-27 | PPF Group a.s. | 8.1% | SCHEDULE 13D/A |
| 2026-09-04 | American Century Investment Management, Inc. | 4.3% | SCHEDULE 13G/A |
| 2026-09-08 | PPF Group a.s. | 6.1% | SCHEDULE 13D/A |
| 2026-09-21 | Emma Omega Ltd | 6.1% | SCHEDULE 13G |
| 2026-09-21 | PPF Group a.s. | 0% | SCHEDULE 13D/A |
Questions about who owns Marinemax Inc
Who owns Marinemax Inc?
On this page, 2 holders' latest ownership filings report 5% or more of Marinemax Inc: BlackRock, Inc. (13.7%, Schedule 13G/A, filed 2025-07-18) and Emma Omega Ltd (6.1%, Schedule 13G, filed 2026-09-21).
Who are the largest shareholders of Marinemax Inc?
By the share each holder's latest filing reports, the largest holders of Marinemax Inc on this page are BlackRock, Inc. (13.7%) and Emma Omega Ltd (6.1%).
When did BlackRock, Inc. buy into Marinemax Inc?
The filings give report dates, not purchase dates. The earliest filing from BlackRock, Inc. on this page is the Schedule 13G/A, filed 2025-07-18, reporting 13.7%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 12 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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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.