Rubico (RUBI) director files initial Form 3 ownership report

Rhea-AI Filing Summary

Rubico Inc. director Christinis Aristovoulos has filed an initial statement of beneficial ownership of securities. The filing reports no transactions, no exercised derivatives, and no net buying or selling activity, serving as a baseline disclosure of insider status at the company.

Key Terms

Form 3, beneficial ownership, reporting person

3 terms

Form 3 regulatory

"INSIDER FILING DATA (Form 3)"

Form 3 is the initial public filing that officers, directors and large shareholders must submit to report their ownership of a company’s securities when they become insiders. It acts like an opening inventory sheet that gives investors a starting point to see who holds significant stakes and to spot later trades or potential conflicts of interest, helping assess insider confidence and transparency.

beneficial ownership financial

"initial statement of beneficial ownership of securities"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

reporting person regulatory

""reportingPersons": [{"name": "Christinis Aristovoulos""

Understanding Insider Trading Forms →

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Christinis Aristovoulos

(Last) (First) (Middle)

215 CANNON HILL LANE

(Street)

LONDON SW20 9 DB

(City) (State) (Zip)

UNITED KINGDOM

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
Rubico Inc. [ RUBI ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

No securities are beneficially owned.

	/s/ Aristovoulos Christinis	04/01/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

FAQ

What does Rubico Inc. (RUBI) disclose in this Form 3 filing?

Rubico Inc. discloses that director Christinis Aristovoulos has filed an initial ownership report. The filing shows no reported transactions or derivative positions, providing a baseline record of this insider’s status with the company at the time of the filing.

Did Christinis Aristovoulos buy or sell Rubico (RUBI) shares in this Form 3?

No, the Form 3 shows no buy or sell activity. The transaction summary reports zero purchases, zero sales, zero exercises, and zero gifts, indicating this is purely an initial ownership disclosure without any trading activity included.

What is the purpose of this Rubico (RUBI) Form 3 for Christinis Aristovoulos?

This Form 3 serves as an initial beneficial ownership statement for director Christinis Aristovoulos. It establishes regulatory disclosure of insider status at Rubico Inc., even though no specific share transactions or derivative holdings are reported in the submission.

Does the Rubico (RUBI) Form 3 show any derivative securities for the director?

No, the filing’s derivative summary is empty, and the transaction summary lists zero derivative transactions or exercises. This indicates the Form 3 does not report any options, warrants, or other derivative positions for the director at this time.

How significant is this Rubico (RUBI) Form 3 filing for investors?

This Form 3 is a routine regulatory filing that records a director’s insider status. Because it reports no transactions, no derivative holdings, and no net share changes, it mainly provides administrative transparency rather than a trading signal for investors.