# RUBICO INC (RUBI)

> Institutional ownership reported to the SEC as of Q1 2026, from Form 13F filings. Source: https://holderbook.com/stocks/RUBI/

- Reporting holders: 4
- Reported value: $19.8K
- Shares held by institutions: 41,426 of 385,501 outstanding
- Held through calls: 0.0%
- Held through puts: 0.0%

A 13F reports long US equity positions only. Shorts, bonds, foreign listings and cash are not visible here, and positions are disclosed up to 45 days after the quarter ends.

## Largest holders

| Manager | Value | Shares | Share of their book | Quarters held |
|---|---|---|---|---|
| [JANE STREET GROUP, LLC](https://holderbook.com/funds/1595888-jane-street-group-llc/) | $13.8K | 28,942 | 0.0% | 1 |
| [Tower Research Capital LLC (TRC)](https://holderbook.com/funds/1533421-tower-research-capital-llc-trc/) | $3.9K | 8,053 | 0.0% | 1 |
| [UBS Group AG](https://holderbook.com/funds/1610520-ubs-group-ag/) | $2.1K | 4,401 | 0.0% | 1 |
| [CITIGROUP INC](https://holderbook.com/funds/831001-citigroup-inc/) | $14 | 30 | 0.0% | 1 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q1 2026 | 4 | $19.8K |
| Q4 2025 | 4 | $39.4K |
| Q3 2025 | 6 | $87.5K |
| Q1 2021 | 1 | $7.9M |
| Q4 2020 | 1 | $767.0K |
| Q2 2020 | 150 | $403.3M |
| Q1 2020 | 147 | $251.7M |
| Q4 2019 | 148 | $322.1M |
| Q3 2019 | 139 | $320.3M |
| Q2 2019 | 106 | $222.8M |
| Q1 2019 | 110 | $200.4M |
| Q4 2018 | 106 | $124.8M |