Nauticus Robotics, Inc.: 5%+ holders

As of November 7, 2026, 4 holders' latest Schedule 13D or 13G filings report owning 5% or more of Nauticus Robotics, Inc. The largest reported stake is Material Impact Fund II, L.P.'s, at 25.2%. 8 filings are on record since August 13, 2025 (Schedule 13D/A, April 17, 2026).

Who owns Nauticus Robotics, Inc.?

KERBER WILLIAM XAVIER III also filed stake reports on 1 other company ↓

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Key facts

• Filing 2026-08-07 · Reporting person: SZOP Opportunities I LLC · Sole voting: 0 · Shared voting: 759,175 · Sole dispositive: 0 · Shared dispositive: 759,175 · SCHEDULE 13G, 2026-08-07
• Filing 2026-07-24 · Reporting person: Rcb Equities 1, LLC · Sole voting: 782,829 · Shared voting: 0 · Sole dispositive: 782,829 · Shared dispositive: 0 · SCHEDULE 13G, 2026-07-24
• Filed 2026-04-17 · Holder: Material Impact Fund II, L.P. · Percent: 25.2% · SCHEDULE 13D/A
• Filed 2025-12-16 · Holder: Material Impact Fund II, L.P. · Percent: 44.6% · SCHEDULE 13D/A
• Filed 2025-12-04 · Holder: Transocean Ltd. · Percent: 0.1% · SCHEDULE 13D/A

Nauticus Robotics, Inc. has 8 Schedule 13D or 13G filings on record since 2025-08-13. 4 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.

Holders

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More on Nauticus Robotics, Inc. and the records around it.

Nauticus Robotics, Inc. elsewhere on the record

• Who owns it

Companies that share a holder

• KERBER WILLIAM XAVIER III also filed stake reports on 1 other company: Palladyne AI Corp. (May 2026)
• SZOP Opportunities I LLC also filed stake reports on 1 other company: La Rosa Holdings Corp. (Feb 2026)
• Transocean Ltd. also filed stake reports on 1 other company: Valaris Limited (Feb 2026)

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What the Full Report on Nauticus Robotics, Inc. covers

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3. What They Do, And How The Money Works

4. Who Runs It, And How To Reach Them

5. The Money: Funding, Valuation, Runway

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Voting and dispositive power, as filed

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The latest filing identifies Nauticus Robotics, Inc. by CUSIP 63911H405 and gives its principal executive office as 17146 Feathercraft Lane, Suite 450, Webster, TX 77598 (SCHEDULE 13G, 2026-08-07).

What the percentages are based on

Approximately 11.4%, based on 6,880,706 shares of Common Stock outstanding as of June 26, 2026 (per the Exchange Agreement between RCB Equities #1, LLC and Nauticus Robotics, Inc. dated June 26, 2026).Rcb Equities 1, LLC, SCHEDULE 13G, 2026-07-24

Purpose of Transaction (Item 4)

Kerber William Xavier Iii

As of the Issuer's recent 10-Q filing dated August 11, 2025 the Issuer stated total outstanding Common Stock of 42,267,643 shares. Mr. Kerber beneficially owns 1,852,696 shares or 4.4% of of the Issuer's outstanding Common Stock and has ceased to be a beneficial owner of five percent or more as of the date of the Issuer's 10-Q filing dated August 11, 2025.Item 4 of the SCHEDULE 13D/A filed 2025-08-13

Material Impact Fund II, L.P.

The information set forth in Item 4 of the Original Schedule 13D is incorporated herein by reference.Item 4 of the SCHEDULE 13D/A filed 2026-04-17

Transocean International Limited

Item 4 is deleted in its entirety and replaced with the following: The information set forth in Item 3 above is incorporated into this Item 4 by reference. Except as described in this Amendment, the Reporting Persons do not have any present plans or proposals that relate to or would result in any of the actions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D.Item 4 of the SCHEDULE 13D/A filed 2025-10-31

Timeline

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Questions about who owns Nauticus Robotics, Inc.

Who owns Nauticus Robotics, Inc.?

On this page, 4 holders' latest ownership filings report 5% or more of Nauticus Robotics, Inc.: Material Impact Fund II, L.P. (25.2%, Schedule 13D/A, filed 2026-04-17), Transocean International Limited (15.8%, Schedule 13D/A, filed 2025-10-31), Rcb Equities 1, LLC (11.4%, Schedule 13G, filed 2026-07-24) and SZOP Opportunities I LLC (9.9%, Schedule 13G, filed 2026-08-07).

Who are the largest shareholders of Nauticus Robotics, Inc.?

By the share each holder's latest filing reports, the largest holders of Nauticus Robotics, Inc. on this page are Material Impact Fund II, L.P. (25.2%), Transocean International Limited (15.8%) and Rcb Equities 1, LLC (11.4%).

When did Material Impact Fund II, L.P. buy into Nauticus Robotics, Inc.?

The filings give report dates, not purchase dates. The earliest filing from Material Impact Fund II, L.P. on this page is the Schedule 13D/A, filed 2025-10-28, reporting 21.5%; its latest, Schedule 13D/A filed 2026-04-17, reports 25.2%. 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%); 8 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.

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