Rubico CFO Papastratis files zero-activity Form 3

Rhea-AI Filing Summary

Rubico Inc. director and officer Papastratis Nikolaos, who serves as CFO and Secretary, filed a Form 3 as a reporting person for Rubico Inc. The filing shows no reported purchases, sales, exercises, gifts, tax withholdings, restructurings, or derivative holdings, with all transaction counts and share amounts at zero.

Key Figures

Buy transactions: 0 Sell transactions: 0 Derivative transactions: 0 +1 more

4 metrics

Buy transactions 0 buyCount in transaction summary

Sell transactions 0 sellCount in transaction summary

Derivative transactions 0 derivativeTransactionCount in transaction summary

Net buy/sell direction neutral netBuySellDirection in transaction summary

Key Terms

Form 3, reportingPersons, derivativeTransactionCount

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.

reportingPersons regulatory

""reportingPersons": [ { "name": "Papastratis Nikolaos""

derivativeTransactionCount financial

""derivativeTransactionCount": 0,"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does Rubico (RUBI) CFO Papastratis Nikolaos report in this Form 3?

The Form 3 lists Papastratis Nikolaos as a director and officer of Rubico Inc. with titles CFO and Secretary. The transaction summary shows zero buys, sells, exercises, gifts, tax withholdings, restructurings, and derivative transactions.

Are there any share purchases or sales reported for Rubico (RUBI) in this Form 3?

No purchases or sales are reported. The transaction summary shows a buyCount and sellCount of zero, with buyShares and sellShares also at zero, indicating no buy or sell activity disclosed in this Form 3.

Does the Rubico (RUBI) Form 3 show any option exercises or derivative activity?

No derivative activity is disclosed. The filing reports exerciseCount and derivativeTransactionCount as zero, exerciseShares as zero, and an empty derivativeSummary, indicating no option or other derivative exercises or conversions.

Are there any gifts or tax-withholding dispositions in the Rubico (RUBI) Form 3?

No. The transactionSummary lists giftCount and taxWithholdingCount as zero, with giftShares and taxWithholdingShares also at zero, indicating no reported gifts or tax-withholding share dispositions for this reporting person.

Does the Rubico (RUBI) Form 3 indicate a net buying or selling direction?

The filing indicates a neutral position. NetBuySellShares is reported as zero and netBuySellDirection is explicitly described as "neutral", consistent with the absence of any buy or sell transactions in the summary.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 04/01/2026 - 03:54 PM EDT Learn about SEC filing dates

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^*

Papastratis Nikolaos

(Last) (First) (Middle)

20 IOULIOU KAISARA STR.

(Street)

PAIANIA 19002

(City) (State) (Zip)

GREECE

(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
X	Officer (give title below)		Other (specify below)
	CFO, Secretary

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/ Nikolaos Papastratis	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)