Sionna Therapeutics, Inc. - Common Stock (SION)
CUSIP: 829401108
Q2 2025 13F Holders as of 30 Jun 2025
- Type / Class
- Equity / Common Stock
- Shares outstanding
- 44,965,485
- Total 13F shares
- 43,448,393
- Share change
- +1,954,685
- Total reported value
- $753,831,077
- Price per share
- $17.35
- Number of holders
- 65
- Value change
- +$37,292,994
- Number of buys
- 43
- Number of sells
- 18
Quarterly Holders Quick Answers
What is CUSIP 829401108?
CUSIP 829401108 identifies SION - Sionna Therapeutics, Inc. - Common Stock in SEC institutional holdings data.
Need full ownership history?
Open the full security ownership history page.
Next holder-history checks
These links keep the next click tied to holder verification, nearby quarters, or outside-13F ownership context.
- Back to full security ownership history for the broader multi-quarter picture.
- Latest 13F filings for newly reported positions across managers.
- Latest Schedule 13D/13G reports for ownership changes outside the 13F cadence.
- SEC investors directory for manager drilldown.
Explore More Reporting Periods
Jump to adjacent filing periods for faster comparison and easier crawl discovery.
Recent filing periods for CUSIP 829401108:
Top shareholders of SION - Sionna Therapeutics, Inc. - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. |
13F
|
Company |
23%
|
10,445,322
|
$109,258,068 | — | 31 Mar 2025 | |
| TPG GP A, LLC |
13D/G
13F
|
Company |
15%
|
6,684,962
|
$80,486,942 | $0 | 10 Feb 2025 | |
| ORBIMED ADVISORS LLC |
13F
|
Company |
8.2%
|
3,704,959
|
$38,753,871 | — | 31 Mar 2025 | |
| Atlas Venture Life Science Advisors, LLC |
13F
|
Company |
8.2%
|
3,694,020
|
$38,639,449 | — | 31 Mar 2025 | |
| VIKING GLOBAL INVESTORS LP |
13D/G
13F
|
Company |
6.7%
|
2,952,754
|
$35,551,158 | $0 | 10 Feb 2025 | |
| Enavate Sciences GP, LLC |
13D/G
13F
|
Company |
5.6%
|
2,478,030
|
$29,835,481 | $0 | 10 Feb 2025 | |
| Qatar Investment Authority |
13D/G
|
— |
5%
|
2,209,775
|
$28,351,413 | $0 | 11 Jun 2025 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
4.8%
|
2,169,599
|
$22,694,006 | — | 31 Mar 2025 | |
| PERCEPTIVE ADVISORS LLC |
13F
|
Company |
2.8%
|
1,251,101
|
$13,086,516 | — | 31 Mar 2025 | |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
|
Company |
2.2%
|
996,212
|
$10,422,000 | — | 31 Mar 2025 | |
| JENNISON ASSOCIATES LLC |
13F
|
Company |
1.9%
|
859,927
|
$8,994,836 | — | 31 Mar 2025 | |
| DEERFIELD MANAGEMENT COMPANY, L.P. |
13F
|
Company |
1.7%
|
747,000
|
$7,813,620 | — | 31 Mar 2025 | |
| Aberdeen Group plc |
13F
|
Company |
1.7%
|
745,964
|
$7,802,783 | — | 31 Mar 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
1.2%
|
546,167
|
$5,712,907 | — | 31 Mar 2025 | |
| FRANKLIN RESOURCES INC |
13F
|
Company |
1.1%
|
500,023
|
$5,230,241 | — | 31 Mar 2025 | |
| BAKER BROS. ADVISORS LP |
13F
|
Company |
0.89%
|
400,000
|
$4,184,000 | — | 31 Mar 2025 | |
| DRIEHAUS CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.73%
|
328,889
|
$3,440,179 | — | 31 Mar 2025 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.73%
|
326,500
|
$3,415,190 | — | 31 Mar 2025 | |
| Siren, L.L.C. |
13F
|
Individual |
0.72%
|
325,000
|
$3,399,500 | — | 31 Mar 2025 | |
| Soleus Capital Management, L.P. |
13F
|
Company |
0.53%
|
240,000
|
$2,510,400 | — | 31 Mar 2025 | |
| Zimmer Partners, LP |
13F
|
Company |
0.53%
|
237,500
|
$2,484,250 | — | 31 Mar 2025 | |
| AMERIPRISE FINANCIAL INC |
13F
|
Company |
0.47%
|
209,266
|
$2,188,922 | — | 31 Mar 2025 | |
| BlackRock, Inc. |
13F
|
Company |
0.44%
|
198,396
|
$2,075,221 | — | 31 Mar 2025 | |
| Alyeska Investment Group, L.P. |
13F
|
Company |
0.41%
|
186,222
|
$1,947,882 | — | 31 Mar 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.4%
|
179,072
|
$1,873,093 | — | 31 Mar 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
0.3%
|
135,563
|
$1,418,644 | — | 31 Mar 2025 | |
| CenterBook Partners LP |
13F
|
Company |
0.25%
|
114,284
|
$1,195,411 | — | 31 Mar 2025 | |
| SILVERARC CAPITAL MANAGEMENT, LLC |
13F
|
Company |
0.25%
|
114,138
|
$1,193,883 | — | 31 Mar 2025 | |
| Rock Springs Capital Management LP |
13F
|
Company |
0.22%
|
99,429
|
$1,040,027 | — | 31 Mar 2025 | |
| Woodline Partners LP |
13F
|
Company |
0.18%
|
80,000
|
$836,800 | — | 31 Mar 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.14%
|
64,644
|
$676,176 | — | 31 Mar 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.14%
|
63,741
|
$666,731 | — | 31 Mar 2025 | |
| PRUDENTIAL FINANCIAL INC |
13F
|
Company |
0.14%
|
63,000
|
$658,980 | — | 31 Mar 2025 | |
| STEMPOINT CAPITAL LP |
13F
|
Company |
0.13%
|
60,000
|
$627,600 | — | 31 Mar 2025 | |
| TD ASSET MANAGEMENT INC |
13F
|
Company |
0.12%
|
55,366
|
$579,128 | — | 31 Mar 2025 | |
| Holocene Advisors, LP |
13F
|
Company |
0.11%
|
50,000
|
$523,000 | — | 31 Mar 2025 | |
| Squarepoint Ops LLC |
13F
|
Company |
0.08%
|
33,964
|
$355,263 | — | 31 Mar 2025 | |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE |
13F
|
Company |
0.07%
|
33,549
|
$350,923 | — | 31 Mar 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.06%
|
26,822
|
$280,558 | — | 31 Mar 2025 | |
| Aster Capital Management (DIFC) Ltd |
13F
|
Company |
0.03%
|
14,757
|
$203,204 | — | 31 Mar 2025 | |
| STATE STREET CORP |
13F
|
Company |
0.03%
|
14,400
|
$150,624 | — | 31 Mar 2025 | |
| BALYASNY ASSET MANAGEMENT L.P. |
13F
|
Company |
0.03%
|
13,060
|
$136,608 | — | 31 Mar 2025 | |
| MARSHALL WACE, LLP |
13F
|
Company |
0.03%
|
12,188
|
$127,486 | — | 31 Mar 2025 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
0.03%
|
11,715
|
$122,539 | — | 31 Mar 2025 | |
| UBS Group AG |
13F
|
Company |
0.02%
|
11,146
|
$116,587 | — | 31 Mar 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.02%
|
8,739
|
$91,410 | — | 31 Mar 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.01%
|
3,939
|
$41,202 | — | 31 Mar 2025 | |
| ROYAL BANK OF CANADA |
13F
|
Company |
0%
|
618
|
$6,000 | — | 31 Mar 2025 | |
| Atlas Venture Fund XI, L.P. |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
3,694,020
|
— | — | 10 Feb 2025 | |
| Joanne L. Viney |
3/4/5
|
Director |
—
mixed-class rows
|
59,878
mixed-class rows
|
— | — | 12 Jun 2025 |
Institutional Holders of Sionna Therapeutics, Inc. - Common Stock (SION) as of Q2 2025
As of 30 Jun 2025,
Sionna Therapeutics, Inc. - Common Stock (SION) was held by
65 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
43,448,393 shares.
The largest 10 holders included
RA CAPITAL MANAGEMENT, L.P., TPG GP A, LLC, ORBIMED ADVISORS LLC, Atlas Venture Life Science Advisors, LLC, VIKING GLOBAL INVESTORS LP, ENAVATE SCIENCES GP, LLC, JPMORGAN CHASE & CO, PERCEPTIVE ADVISORS LLC, BRAIDWELL LP, and DEERFIELD MANAGEMENT COMPANY, L.P..
This page lists
65
institutional shareholders reporting positions in this security
for the Q2 2025 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q2 2025 vs Q1 2025 Across Filers
Q1 2025 holders
47
Q2 2025 holders
65
Holder diff
18
| Investor | Q1 2025 Shares | Q2 2025 Shares | Share Diff | Share Chg % | Q1 2025 Value $ | Q2 2025 Value $ | Value Diff $ | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.
An asterisk sign (*) next to the price indicates that the price is likely invalid.