[SCHEDULE 13D/A] Nauticus Robotics, Inc. Common stock SEC Filing

Rhea-AI Filing Summary

William Xavier Kerber III reports beneficial ownership of 1,852,696 shares of Nauticus Robotics common stock, representing 4.4% of the issuer's outstanding shares based on the issuer's recent 10-Q showing 42,267,643 shares outstanding. Mr. Kerber states he has sole voting and dispositive power over these shares and that all shares were acquired with his personal funds without loans.

The filing notes Mr. Kerber ceased to be a beneficial owner of five percent or more as reported in the issuer's recent 10-Q. He reports no transactions in the past 60 days and no contracts, arrangements or understandings with respect to the issuer's securities.

Positive

• Clear disclosure of beneficial ownership: 1,852,696 shares representing 4.4% of outstanding common stock
• Sole voting and dispositive power over the reported shares
• Acquired with personal funds and no loans were used

Negative

• Ownership fell below 5%, as stated in the issuer's recent 10-Q, reducing potential status as a >5% beneficial owner
• No transactions in the past 60 days reported, indicating no recent accumulation or disposition activity

Insights

Securities Analyst

TL;DR: Disclosure shows a 4.4% stake with sole control, no financing, and no recent trading activity — largely routine, limited market impact.

This Schedule 13D/A confirms Mr. Kerber's beneficial ownership of 1,852,696 shares (4.4%) and sole voting and dispositive power, using personal funds. The filing clarifies he is no longer above the 5% threshold reported in the issuer's recent 10-Q, which reduces certain regulatory and market signaling implications that accompany larger stakes. The absence of loans and the statement of no transactions in the past 60 days suggest no recent accumulation or disposition activity to shift the ownership materially.

Corporate Governance Expert

TL;DR: Governance disclosure is complete and transparent; falling below 5% lowers potential influence and reduces regulatory scrutiny.

The amendment provides clear ownership and control metrics: 1,852,696 shares and sole voting/dispositive authority. Reporting that he ceased to be a >5% beneficial owner as shown in the issuer's 10-Q is material to governance because crossing the 5% threshold can change reporting obligations and market perception of activist potential. No contracts or arrangements are disclosed, indicating no formal governance or strategic agreements tied to this stake.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 4)

Nauticus Robotics, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

63911H207

(CUSIP Number)

William Kerber
3917 NE 104TH ST,
Oklahoma City, OK, 73131
405-373-6600

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

08/11/2025

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

SCHEDULE 13D

CUSIP No. 63911H207

1

Name of reporting person

KERBER WILLIAM XAVIER III

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

PF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

OKLAHOMA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 1,852,696.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 1,852,696.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

1,852,696.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

4.4 %

14

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Common Stock
(b)	Name of Issuer: Nauticus Robotics, Inc.
(c)	Address of Issuer's Principal Executive Offices: 17146 FEATHERCRAFT LANE, 17146 FEATHERCRAFT LANE, WEBSTER, TEXAS , 77598.
Item 2.	Identity and Background
(a)	WILLIAM XAVIER KERBER III
(b)	3917 NE 104TH ST Oklahoma City, OK. 73131
(c)	CEO Human Mode LLC 3917 NE 104TH ST Oklahoma City, OK. 73131
(d)	During the past 5 years, Mr. Kerber has not been convicted in any criminal proceeding (excluding traffic violations or similar misdemeanors).
(e)	During the past 5 years, Mr. Kerber has not been a party to any civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding such person was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.
(f)	United States
Item 3.	Source and Amount of Funds or Other Consideration
	All of the shares of Common Stock were acquired using Mr. Kerber's personal funds. No loans were involved in these purchases.
Item 4.	Purpose of Transaction
	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 5.	Interest in Securities of the Issuer
(a)	As of the date of this Amendment No. 4, Mr. Kerber beneficially owns 1,852,696 shares or 4.4% of the Issuer's outstanding shares of Common Stock. The beneficial ownership percentages used in this Schedule are calculated based on the 42,267,643 shares of Common Stock of the Issuer outstanding as stated in the Issuer's recent 10-Q filing dated August 11, 2025.
(b)	As of the date of this Amendment No. 4, Mr. Kerber has sole voting and dispositive power of the 1,852,696 shares or 4.4 % of the Issuer's Common Stock.
(c)	Mr. Kerber has not effected any transactions in the Common Stock during the past 60 days or since his most recent Schedule 13D filing dated April 10, 2025.
(e)	Mr. Kerber ceased to be a beneficial owner of five percent or more of the Issuer's Common Stock as of the Issuer's most recent 10-Q filing dated August 11, 2025.
Item 6.	Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer
	As of the filing date of this Amendment, Mr. Kerber is not involved in any contracts, arrangements, under standings or relationships related to any securities of the Issuer.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

KERBER WILLIAM XAVIER III

Signature:	WILLIAM XAVIER KERBER III
Name/Title:	WILLIAM XAVIER KERBER III
Date:	08/13/2025

FAQ

How many Nauticus Robotics (KITT) shares does William Kerber beneficially own?

Mr. Kerber beneficially owns 1,852,696 shares of Nauticus Robotics common stock.

What percentage of Nauticus Robotics (KITT) does Kerber's stake represent?

The reported holding represents 4.4% of the issuer's common stock based on the issuer's recent 10-Q.

Does Kerber have voting control over the shares he reports?

Yes. He reports sole voting and dispositive power over the 1,852,696 shares.

Were Kerber's shares financed with loans or other external funds?

No. The filing states all shares were acquired using personal funds and no loans were involved.

Has Kerber traded Nauticus Robotics (KITT) stock recently?

The filing states Mr. Kerber has not effected any transactions in the Common Stock during the past 60 days.