# INVESTMENT MANAGERS SER TR I (QUBX)

> Institutional ownership reported to the SEC as of Q2 2026, from Form 13F filings. Source: https://holderbook.com/stocks/QUBX/

- Reporting holders: 10
- Reported value: $154.1M
- Held through calls: 54.3%
- Held through puts: 44.3%

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 |
|---|---|---|---|---|
| [IMC-Chicago, LLC](https://holderbook.com/funds/1452861-imc-chicago-llc/) | $105.2M | 0 | 0.0% | 2 |
| [SIMPLEX TRADING, LLC](https://holderbook.com/funds/1488542-simplex-trading-llc/) | $30.4M | 0 | 0.0% | 2 |
| [GROUP ONE TRADING LLC](https://holderbook.com/funds/932540-group-one-trading-llc/) | $13.3M | 0 | 0.0% | 3 |
| [CITADEL ADVISORS LLC](https://holderbook.com/funds/1423053-citadel-advisors-llc/) | $3.3M | 52,602 | 0.0% | 3 |
| [HRT FINANCIAL LP](https://holderbook.com/funds/1475597-hrt-financial-lp/) | $906.0K | 30,086 | 0.0% | 1 |
| [Belvedere Trading LLC](https://holderbook.com/funds/1632341-belvedere-trading-llc/) | $269.3K | 2,142 | 0.0% | 1 |
| [Strategic Blueprint, LLC](https://holderbook.com/funds/1767821-strategic-blueprint-llc/) | $223.2K | 20,417 | 0.0% | 1 |
| [SUSQUEHANNA INTERNATIONAL GROUP, LLP](https://holderbook.com/funds/1446194-susquehanna-international-group-llp/) | $215.4K | 19,703 | 0.0% | 1 |
| [JANE STREET GROUP, LLC](https://holderbook.com/funds/1595888-jane-street-group-llc/) | $194.6K | 0 | 0.0% | 2 |
| [Optiver Holding B.V.](https://holderbook.com/funds/1859606-optiver-holding-b-v/) | $107.2K | 9,812 | 0.0% | 3 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q2 2026 | 10 | $154.1M |
| Q1 2026 | 8 | $18.6M |
| Q4 2025 | 9 | $11.9M |
| Q3 2025 | 7 | $5.2M |
| Q2 2025 | 1 | $19.7K |