$RUBI

$0.15 -$0.02 (8.94%) Close

$RUBI Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 385.5K shares outstanding

Who owns RUBI?

By type of holder

Institutions 0.0% Insiders 0.0% Everyone else 100.0%

Concentration Top 1 holders own 380.1%

Family Trading Inc. 380.1%

Institutional ownership

0.0%

0.0 pts vs last qtr

Institutional holders

-1 vs last qtr

Net shares bought

−1

by institutions in Q2 2026

New / sold out

0 / 1

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

None.

Biggest sellers in Q2 2026

SBI Securities Co., Ltd. SOLD OUT −1

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Rubico Inc in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2023–FY2025

+312.6%

+103.13% a year

Each share's claim on the business

−75.8%

shrank without buying or selling a share

Diluted shares, split-adjusted

How patient are the owners?

No 13F manager reports holding RUBI.

Super Investors

Investment managers reporting RUBI on Form 13F

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
SS SBI Securities Co., Ltd.	—	—	SOLD OUT		—	0.0%
Shares held by quarter Peak holding15 (Q3'25) Change over 8 quarters0 SBI Securities Co., Ltd.'s full portfolio →

SBI Securities Co., Ltd.

—

% of company

—

Change vs last qtr

SOLD OUT

Held since

—

Institutional Funds

Mutual funds and ETFs reporting RUBI on Form N-PORT; together they hold 0.5% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
DU Dimensional US Small Cap Value ETF Dimensional ETF Trust	$1.5K	1.9K	0.50%	0.00%	October 31, 2025
DU Dimensional U.S. Targeted Value ETF Dimensional ETF Trust	$3.57	1	0.00%	0.00%	April 30, 2026

Dimensional US Small Cap Value ETF

Dimensional ETF Trust

Position value

$1.5K

% of company

0.50%

% of the fund

0.00%

As of

October 31, 2025

Dimensional U.S. Targeted Value ETF

Dimensional ETF Trust

Position value

$3.57

% of company

0.00%

% of the fund

0.00%

As of

April 30, 2026

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
FT Family Trading Inc. 5%+ holder 13D · 3.3%	1.5M	380.12%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company380.120% Disclosed stake13D · 3.3% View the 13D/G filing →

Family Trading Inc.

5%+ holder13D · 3.3%

1.5M

% of company

380.12%

Change vs last qtr

—

Held since

—

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