# EDGAR Filing Document

**Accession Number:** 0001849820
**File Stem:** 0001451505-25-000131
**Filing Date:** 2025-12
**Character Count:** 10866
**Document Hash:** 5b7c188fe09f2446f03b17fe7a197b89
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001451505-25-000131.hdr.sgml**: 20251204

**ACCESSION NUMBER**: 0001451505-25-000131

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251204

**DATE AS OF CHANGE**: 20251204

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Nauticus Robotics, Inc.
- **CENTRAL INDEX KEY:** 0001849820
- **STANDARD INDUSTRIAL CLASSIFICATION:** GENERAL INDUSTRIAL MACHINERY & EQUIPMENT, NEC [3569]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-92701
- **FILM NUMBER:** 251550636

**BUSINESS ADDRESS:**
- **STREET 1:** 17146 FEATHERCRAFT LANE
- **STREET 2:** SUITE 450
- **CITY:** WEBSTER
- **STATE:** TX
- **ZIP:** 77598
- **BUSINESS PHONE:** 281-942-9069

**MAIL ADDRESS:**
- **STREET 1:** 17146 FEATHERCRAFT LANE
- **STREET 2:** SUITE 450
- **CITY:** WEBSTER
- **STATE:** TX
- **ZIP:** 77598

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** cleantech Acquisition Corp.
- **DATE OF NAME CHANGE:** 20210308
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Transocean Ltd.
- **CENTRAL INDEX KEY:** 0001451505
- **STANDARD INDUSTRIAL CLASSIFICATION:** DRILLING OIL & GAS WELLS [1381]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 980599916
- **STATE OF INCORPORATION:** V8
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**BUSINESS ADDRESS:**
- **STREET 1:** TURMSTRASSE 30
- **CITY:** STEINHAUSEN
- **STATE:** V8
- **ZIP:** 6312
- **BUSINESS PHONE:** 41 41 749 0500

**MAIL ADDRESS:**
- **STREET 1:** TURMSTRASSE 30
- **CITY:** STEINHAUSEN
- **STATE:** V8
- **ZIP:** 6312

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 3)**

**NAUTICUS ROBOTICS, INC.**

*(Name of Issuer)*

**Common stock, par value $0.0001 per share**

*(Title of Class of Securities)*

**63911H306**

*(CUSIP Number)*

**Sandro Thoma**<br>Turmstrasse 30<br>Steinhausen V8 CH-6312<br>41 41 749-0500

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

**11/28/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **63911H306** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Transocean Ltd.** | Name of reporting person<br>**Transocean Ltd.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**V8** | Citizenship or place of organization<br>**V8** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6421.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6421.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6421.00** | Aggregate amount beneficially owned by each reporting person<br>**6421.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.1%** | Percent of class represented by amount in Row (11)<br>**0.1%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

**Comment for Reporting Person:** (1) The amount reported in Row (8), Row (10) and Row (11) is the number of shares of common stock ("shares") of Nauticus Robotics, Inc. (the "Issuer") that the reporting person has a right to acquire on or before September 9, 2027, pursuant to certain earnout conditions, as described in the Merger Agreement (the "Earnout Shares").
(2)  The percentage reported in Row (13) is based on 13,710,615 shares of the Issuer outstanding as of November 13, 2025, as disclosed by the Issuer in the Issuer's Quarterly Report on Form 10-Q filed with the U.S. Securities and Exchange Commission (the "SEC") on November 14, 2025, including the Earnout Shares in accordance with Rule 13d-3(d)(1)(i).

| **CUSIP No.** | **63911H306** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Transocean International Limited** | Name of reporting person<br>**Transocean International Limited** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**D0** | Citizenship or place of organization<br>**D0** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6421.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6421.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6421.00** | Aggregate amount beneficially owned by each reporting person<br>**6421.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.1%** | Percent of class represented by amount in Row (11)<br>**0.1%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

**Comment for Reporting Person:** (1) The amount reported in Row (8), Row (10) and Row (11) is the number of Earnout Shares.
(2)  The percentage reported in Row (13) is based on 13,710,615 shares of the Issuer outstanding as of November 13, 2025, as disclosed by the Issuer in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on November 14, 2025, including the Earnout Shares in accordance with Rule 13d-3(d)(1)(i).

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common stock, par value $0.0001 per share

**(b) Name of Issuer:**
NAUTICUS ROBOTICS, INC.

**(c) Address of Issuer's Principal Executive Offices:**
17146 FEATHERCRAFT LANE, SUITE 450, WEBSTER, TX, 77598

This Amendment No. 3 to Schedule 13D (this "Amendment") amends the statement on Schedule 13D originally filed with the SEC on September 19, 2022, as previously amended (the "Prior 13D"), with respect to the shares of the Issuer. Unless set forth in this Amendment, all Items are unchanged from the Prior 13D. Capitalized terms used and not defined herein shall have the meanings ascribed to them in the Prior 13D.

**Item 5. Interest in Securities of the Issuer**

**(a)**
Item 5 is deleted in its entirety and replaced with the following:

As of the date hereof, Transocean International Limited beneficially owns 6,421 shares of the Issuer, constituting approximately 0.047% of the 13,710,615 shares of the Issuer outstanding as of November 13, 2025, as disclosed by the Issuer in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on November 14, 2025, including the Earnout Shares in accordance with Rule 13d-3(d)(1)(i). Because Transocean Ltd. controls Transocean International Limited, both Transocean Ltd. and Transocean International Limited are deemed to beneficially own the shares of the Issuer that Transocean International Limited holds directly or has a right to acquire.

The percentage beneficially owned reported herein is based on 13,710,615 shares of the Issuer outstanding as of November 13, 2025, as disclosed by the Issuer in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on November 14, 2025, including the Earnout Shares in accordance with Rule 13d-3(d)(1)(i).

**(b)**
Transocean Ltd. and Transocean International Limited have shared voting and dispositive power over the shares of the Issuer beneficially owned by Transocean International Limited.

**(c)**
Except as described herein, the Reporting Persons have not effected any reportable transactions in the shares of the Issuer within the last 60 days: (1) on November 28, 2025, Transocean International Limited sold 28,185 shares of the Issuer in the open market at a price of $0.90 per share of the Issuer; (2) on December 1, 2025, Transocean International Limited sold 61,351 shares of the Issuer in the open market at a price of $0.81 per share of the Issuer; (3) on December 2, 2025, Transocean International Limited sold 32,839 shares of the Issuer in the open market at a price of $0.74 per share of the Issuer; and (4) on December 3, 2025, Transocean International Limited sold 2,021,920 shares of the Issuer in the open market at a price of $1.02 per share of the Issuer (collectively, the "Sale Transactions").

### 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.

**Reporting Person:** Transocean Ltd.

**Signature:** /s/ Daniel Ro-Trock

**Name/Title:** Assistant Corporate Secretary

**Date:** 12/04/2025

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.

**Reporting Person:** Transocean International Limited

**Signature:** /s/ Daniel Ro-Trock

**Name/Title:** Daniel Ro-Trock, by Power of Attorney

**Date:** 12/04/2025