QUANTUM SI INC (QSI): Institutional Ownership
Hedge funds and institutional managers reporting a position in QSI · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
6
13F filers
Aggregate Value
$171K
Across holders
Last Price
$0.85
2026-06-26
Sector
Health Care
GICS
Holder activity2 new1 added3 reduced
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| RENAISSANCE TECHNOLOGIES LLC CIK 0001037389 | Hedge Fund | 118K | $91K | 53.4% | 0.0% | New | — | Q1 2026 |
| TWO SIGMA INVESTMENTS, LP CIK 0001179392 | Hedge Fund | 53K | $41K | 24.0% | 0.0% | Reduced | $-1.0M | Q1 2026 |
| BALYASNY ASSET MANAGEMENT LLC CIK 0001218710 | Hedge Fund | 19K | $21K | 12.4% | 0.0% | New | — | Q4 2025 |
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 16K | $12K | 7.0% | 0.0% | Reduced | $-418K | Q1 2026 |
| AQR CAPITAL MANAGEMENT LLC CIK 0001167557 | Hedge Fund | 7K | $5K | 3.0% | 0.0% | Added | +$5K | Q1 2026 |
| Walleye Capital LLC CIK 0001758720 | Hedge Fund | 312 | $241 | 0.1% | 0.0% | Reduced | $-18K | Q1 2026 |
New
Hedge Fund
$91K· 53.4% of total· 0.0% port· 118K sh· — QoQ· Q1 2026
Reduced
Hedge Fund
$41K· 24.0% of total· 0.0% port· 53K sh· $-1.0M QoQ· Q1 2026
New
Hedge Fund
$21K· 12.4% of total· 0.0% port· 19K sh· — QoQ· Q4 2025
Reduced
Hedge Fund
$12K· 7.0% of total· 0.0% port· 16K sh· $-418K QoQ· Q1 2026
Added
Hedge Fund
$5K· 3.0% of total· 0.0% port· 7K sh· +$5K QoQ· Q1 2026
Reduced
Hedge Fund
$241· 0.1% of total· 0.0% port· 312 sh· $-18K QoQ· Q1 2026