SIONNA THERAPEUTICS INC (SION): Institutional Ownership
Hedge funds and institutional managers reporting a position in SION · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
12
13F filers
Aggregate Value
$185.7M
Across holders
Last Price
$42.18
2026-06-26
Sector
Health Care
GICS
Holder activity8 new1 added2 reduced
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| VIKING GLOBAL INVESTORS LP CIK 0001103804 | Hedge Fund | 3.20M | $128.1M | 69.0% | 0.4% | Unchanged | +$0 | Q1 2026 |
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 1.14M | $45.7M | 24.6% | 0.0% | Added | +$2.1M | Q1 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 0001165408 | Hedge Fund | 150K | $6.0M | 3.2% | 0.0% | New | — | Q1 2026 |
| Qube Research & Technologies Ltd CIK 0001729829 | Hedge Fund | 42K | $1.7M | 0.9% | 0.0% | New | — | Q1 2026 |
| Holocene Advisors, LP CIK 0001700574 | Hedge Fund | 50K | $1.5M | 0.8% | 0.0% | New | — | Q3 2025 |
| MARSHALL WACE, LLP CIK 0001318757 | Hedge Fund | 30K | $885K | 0.5% | 0.0% | New | — | Q3 2025 |
| Walleye Capital LLC CIK 0001758720 | Hedge Fund | 15K | $605K | 0.3% | 0.0% | New | — | Q1 2026 |
| RENAISSANCE TECHNOLOGIES LLC CIK 0001037389 | Hedge Fund | 15K | $429K | 0.2% | 0.0% | Reduced | $-335K | Q3 2025 |
| ExodusPoint Capital Management, LP CIK 0001736225 | Hedge Fund | 7K | $288K | 0.2% | 0.0% | New | — | Q1 2026 |
| Hudson Bay Capital Management LP CIK 0001393825 | Hedge Fund | 6K | $248K | 0.1% | 0.0% | New | — | Q1 2026 |
| TWO SIGMA INVESTMENTS, LP CIK 0001179392 | Hedge Fund | 6K | $220K | 0.1% | 0.0% | Reduced | $-36K | Q1 2026 |
| BALYASNY ASSET MANAGEMENT LLC CIK 0001218710 | Hedge Fund | 1K | $58K | 0.0% | 0.0% | New | — | Q4 2025 |
Unchanged
Hedge Fund
$128.1M· 69.0% of total· 0.4% port· 3.20M sh· +$0 QoQ· Q1 2026
Added
Hedge Fund
$45.7M· 24.6% of total· 0.0% port· 1.14M sh· +$2.1M QoQ· Q1 2026
New
Hedge Fund
$6.0M· 3.2% of total· 0.0% port· 150K sh· — QoQ· Q1 2026
New
Hedge Fund
$1.7M· 0.9% of total· 0.0% port· 42K sh· — QoQ· Q1 2026
New
Hedge Fund
$1.5M· 0.8% of total· 0.0% port· 50K sh· — QoQ· Q3 2025
New
Hedge Fund
$885K· 0.5% of total· 0.0% port· 30K sh· — QoQ· Q3 2025
New
Hedge Fund
$605K· 0.3% of total· 0.0% port· 15K sh· — QoQ· Q1 2026
Reduced
Hedge Fund
$429K· 0.2% of total· 0.0% port· 15K sh· $-335K QoQ· Q3 2025
New
Hedge Fund
$288K· 0.2% of total· 0.0% port· 7K sh· — QoQ· Q1 2026
New
Hedge Fund
$248K· 0.1% of total· 0.0% port· 6K sh· — QoQ· Q1 2026
Reduced
Hedge Fund
$220K· 0.1% of total· 0.0% port· 6K sh· $-36K QoQ· Q1 2026
New
Hedge Fund
$58K· 0.0% of total· 0.0% port· 1K sh· — QoQ· Q4 2025