SPERO THERAPEUTICS INC (SPRO): Institutional Ownership
Hedge funds and institutional managers reporting a position in SPRO · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
6
13F filers
Aggregate Value
$6.0M
Across holders
Last Price
$2.26
2026-06-26
Sector
Health Care
GICS
Holder activity3 new2 added1 reduced
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| RENAISSANCE TECHNOLOGIES LLC CIK 0001037389 | Hedge Fund | 1.19M | $2.8M | 46.7% | 0.0% | Reduced | $-211K | Q1 2026 |
| TWO SIGMA INVESTMENTS, LP CIK 0001179392 | Hedge Fund | 886K | $2.1M | 34.8% | 0.0% | Added | +$1.2M | Q1 2026 |
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 287K | $672K | 11.3% | 0.0% | Added | +$501K | Q1 2026 |
| AQR CAPITAL MANAGEMENT LLC CIK 0001167557 | Hedge Fund | 187K | $373K | 6.3% | 0.0% | New | — | Q3 2022 |
| Schonfeld Strategic Advisors LLC CIK 0001665241 | Hedge Fund | 20K | $48K | 0.8% | 0.0% | New | — | Q1 2026 |
| MARSHALL WACE, LLP CIK 0001318757 | Hedge Fund | 7K | $16K | 0.3% | 0.0% | New | — | Q1 2026 |
Reduced
Hedge Fund
$2.8M· 46.7% of total· 0.0% port· 1.19M sh· $-211K QoQ· Q1 2026
Added
Hedge Fund
$2.1M· 34.8% of total· 0.0% port· 886K sh· +$1.2M QoQ· Q1 2026
Added
Hedge Fund
$672K· 11.3% of total· 0.0% port· 287K sh· +$501K QoQ· Q1 2026
New
Hedge Fund
$373K· 6.3% of total· 0.0% port· 187K sh· — QoQ· Q3 2022
New
Hedge Fund
$48K· 0.8% of total· 0.0% port· 20K sh· — QoQ· Q1 2026
New
Hedge Fund
$16K· 0.3% of total· 0.0% port· 7K sh· — QoQ· Q1 2026