# EDGAR Filing Document

**Accession Number:** 0001943421
**File Stem:** 0001171843-25-005006
**Filing Date:** 2025-8
**Character Count:** 3716
**Document Hash:** c330023a52551f188e73681d54657b50
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001171843-25-005006.hdr.sgml**: 20250804

**ACCESSION NUMBER**: 0001171843-25-005006

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 3

**CONFORMED PERIOD OF REPORT**: 20250804

**FILED AS OF DATE**: 20250804

**DATE AS OF CHANGE**: 20250804

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Rubico Inc.
- **CENTRAL INDEX KEY:** 0001943421
- **STANDARD INDUSTRIAL CLASSIFICATION:** WATER TRANSPORTATION [4400]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 000000000
- **STATE OF INCORPORATION:** 1T
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42684
- **FILM NUMBER:** 251181417

**BUSINESS ADDRESS:**
- **STREET 1:** VAS SOFIAS 1 & MEG. ALEXANDROU
- **CITY:** ATHENS
- **STATE:** J3
- **ZIP:** 151 24
- **BUSINESS PHONE:** 30 2108128180

**MAIL ADDRESS:**
- **STREET 1:** VAS SOFIAS 1 & MEG. ALEXANDROU
- **CITY:** ATHENS
- **STATE:** J3
- **ZIP:** 151 24

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Central Tactical Acquisitions Inc.
- **DATE OF NAME CHANGE:** 20220818

**UNITED STATES SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 6-K**

**REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13A-16 OR 15D-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934**

For the month of August 2025

Commission File Number: 001-42684

## RUBICO INC.
(Translation of registrant's name into English)

**20 Iouliou Kaisara Str <br> 19002 Paiania** 

**Athens, Greece** 

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

**Form 20-F ☒ Form 40-F ☐**

**INFORMATION CONTAINED IN THIS FORM 6-K REPORT**

On August 4, 2025, the Registrant issued a press release, a copy of which is attached hereto as [Exhibit 99.1](exh_991.htm).

**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | |
|:---|:---|
|  | **Rubico Inc.** |
| Date: August 4, 2025 | By: /s/ Nikolaos Papastratis |
|  | Nikolaos Papastratis |
|  | Chief Financial Officer |

---

## Exhibit 99.1

**Exhibit 99.1**

![](logo.jpg)

**Rubico Announces Commencement of Trading on the Nasdaq Capital Market**

**August 4, 2025 - Athens, Greece** – Rubico Inc. (the "Company" or "Rubico") (Nasdaq: RUBI) announced today that it has completed its spin-off from Tops Ships Inc. effective August 1, 2025. The Company's shares have commenced trading as of today, August 4, 2025, on the Nasdaq Capital Market under the ticker symbol "RUBI".

Additional information about Rubico and the spin-off transaction can be found in the Rubico registration statement filed pursuant to the Securities Exchange Act of 1934 on Form 20-F, which is available at www.sec.gov or at https://rubicoinc.com/ under Investors/SEC Filings.

**About the Company**

Rubico Inc. is a global provider of shipping transportation services specializing in the ownership of vessels. The Company is an international owner and operator of two modern, fuel efficient, eco 157,000 dwt Suezmax tankers.

The Company is incorporated under the laws of the Republic of the Marshall Islands and has executive offices in Athens, Greece. The Company's common shares trade on the Nasdaq Capital Market under the symbol "RUBI".

Please visit the Company's website at: https://rubicoinc.com/

**For further information please contact:**

Nikolaos Papastratis <br> Chief Financial Officer <br> Rubico Inc. <br> Tel: +30 210 812 8107 <br> Email: npapastratis@rubicoinc.com