Security key
829401108
Sionna Therapeutics, Inc. - Common Stock, $0.001 par value per share (SION)
CUSIP: 829401108
Q1 2025 13F Holders as of 31 Mar 2025
- Security type / class
- Equity / Common Stock, $0.001 par value per share
- Shares outstanding
- 45,002,549
- Total 13F shares
- 41,491,947
- Share change
- +41,491,947
- Total reported value
- $434,056,422
- Reported price per share
- $10.46
- Number of holders
- 47
- Value change
- +$434,056,422
- Number of buys
- 47
Security identity
Holder snapshot
Report period
Q1 2025
Institutions
47
Top holders
10
SION full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2025
Sionna Therapeutics, Inc. SEC filings
Sionna Therapeutics, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 829401108
Recent filing periods:
Ownership snapshot
Top reported holders of SION - Sionna Therapeutics, Inc. - Common Stock, $0.001 par value per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Lead holder
TPG GP A, LLC
13D/G signal
TPG GP A, LLC
Evidence rows
3
Latest as of
10 Feb 2025
13D/G
3/4/5
Lead comparable stake: 15%
13D/G row: TPG GP A, LLC
Rank 1 holder
TPG GP A, LLC
13D/G
- Ownership
- 15%
- Position
- $80.49M
Rank 2 holder
Enavate Sciences GP, LLC
13D/G
- Ownership
- 5.6%
- Position
- $29.84M
Rank 3 holder
Atlas Venture Fund XI, L.P.
3/4/5
- Ownership
- —
- Position
- —
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| TPG GP A, LLC |
13D/G
|
15%
|
$80,486,942
6,684,962 shares
|
$0 | 10 Feb 2025 |
| Enavate Sciences GP, LLC |
13D/G
|
5.6%
|
$29,835,481
2,478,030 shares
|
$0 | 10 Feb 2025 |
| Atlas Venture Fund XI, L.P. |
3/4/5
10%+ Owner
|
—
class O/S missing
|
—
3,694,020 shares
|
— | 10 Feb 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
47
Shares
41,491,947
Rows available
47
| Investor | Option | Weight % | Change % | Reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* Reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that failed the local validity check.
Compare Q1 2025 vs Q4 2025 Across Filers
Q4 2025 holders
101
Q1 2025 holders
47
Holder diff
-54
| Investor | Q4 2025 Shares | Q1 2025 Shares | Share Diff | Share Chg % | Q4 2025 value | Q1 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend