RUBI
Rubico Inc.Company with tickers: RUBI
CIK
1943421
CUSIP
Y1250N115
Shares Outstanding
3,262,998
13F Activity (30d)
3 filings
3 filers
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Holders: 4
Total Value: $19,841
Total Shares: 41,426
Holder Concentration
Across 4 13F filersTop Holder
69.9%
of institutional value
Top 5
100.0%
of institutional value
Top 10
100.0%
of institutional value
HHI
5,372
Highly concentrated
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Open | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Mega JANE STREET GROUP, LLC | $13,862 | 69.87% | 28,942 | Shares | Defined | 2026-05-12 | ||||
| Mid Tower Research Capital LLC (TRC) | $3,857 | 19.44% | 8,053 | Shares | Defined | 2026-05-15 | ||||
| Mega UBS Group AG | $2,108 | 10.62% | 4,401 | Shares | Defined | 2026-05-05 | ||||
| Mega CITIGROUP INC | $14 | 0.07% | 30 | Shares | Defined | 2026-05-11 | ||||
| No holders match your search. | ||||||||||