RA CAPITAL MANAGEMENT, L.P.

PrivateCIK: 1346824
Location

BOSTON, MA

RA CAPITAL MANAGEMENT, L.P. sold 44.8% of their position (136.35K shares) of SIONNA THERAPEUTICS, INC. on the open market

Open‑market sale worth $5.50M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 24 sales
InsiderRA CAPITAL MANAGEMENT, L.P.CIK 1346824
IssuerSIONNA THERAPEUTICS, INC.CIK 2036042
Director10% Owner
Since Feb 2025
-136.35K
Net shares
Net seller
$5.50M
Total sold
24
Open market trades
0B · 24S
24
Total transactions
136.35K disposed
Non-Derivative Transactions24

Common Stock

Indirect
S · Sale

Shares

2.18K

Price / share

$40.20

Trade value

$87.72K

% of position

0.0%
11/17/2025
6.91M6.90M

Common Stock

Indirect
S · Sale

Shares

17.91K

Price / share

$40.20

Trade value

$720.10K

% of position

2.5%
11/17/2025
715.99K698.08K

Common Stock

Indirect
S · Sale

Shares

11.63K

Price / share

$40.20

Trade value

$467.37K

% of position

0.5%
11/17/2025
2.24M2.23M

Common Stock

Indirect
S · Sale

Shares

13.73K

Price / share

$40.20

Trade value

$552.11K

% of position

6.6%
11/17/2025
209.39K195.66K

Common Stock

Indirect
S · Sale

Shares

1.70K

Price / share

$41.05

Trade value

$69.83K

% of position

0.0%
11/17/2025
6.90M6.90M

Common Stock

Indirect
S · Sale

Shares

13.96K

Price / share

$41.05

Trade value

$573.22K

% of position

2.0%
11/17/2025
698.08K684.11K

Common Stock

Indirect
S · Sale

Shares

9.06K

Price / share

$41.05

Trade value

$372.04K

% of position

0.4%
11/17/2025
2.23M2.22M

Common Stock

Indirect
S · Sale

Shares

10.71K

Price / share

$41.05

Trade value

$439.52K

% of position

5.5%
11/17/2025
195.66K184.95K

Common Stock

Indirect
S · Sale

Shares

53.00

Price / share

$42.10

Trade value

$2.23K

% of position

0.0%
11/17/2025
6.90M6.90M

Common Stock

Indirect
S · Sale

Shares

433.00

Price / share

$42.10

Trade value

$18.23K

% of position

0.1%
11/17/2025
684.11K683.68K

Common Stock

Indirect
S · Sale

Shares

280.00

Price / share

$42.10

Trade value

$11.79K

% of position

0.0%
11/17/2025
2.22M2.22M

Common Stock

Indirect
S · Sale

Shares

331.00

Price / share

$42.10

Trade value

$13.94K

% of position

0.2%
11/17/2025
184.95K184.62K

Common Stock

Indirect
S · Sale

Shares

332.00

Price / share

$39.57

Trade value

$13.14K

% of position

0.0%
11/18/2025
6.90M6.90M

Common Stock

Indirect
S · Sale

Shares

2.73K

Price / share

$39.57

Trade value

$107.95K

% of position

0.4%
11/18/2025
683.68K680.95K

Common Stock

Indirect
S · Sale

Shares

1.77K

Price / share

$39.57

Trade value

$70.04K

% of position

0.1%
11/18/2025
2.22M2.22M

Common Stock

Indirect
S · Sale

Shares

2.09K

Price / share

$39.57

Trade value

$82.78K

% of position

1.1%
11/18/2025
184.62K182.53K

Common Stock

Indirect
S · Sale

Shares

2.28K

Price / share

$40.01

Trade value

$91.06K

% of position

0.0%
11/19/2025
6.90M6.90M

Common Stock

Indirect
S · Sale

Shares

18.68K

Price / share

$40.01

Trade value

$747.55K

% of position

2.7%
11/19/2025
680.95K662.27K

Common Stock

Indirect
S · Sale

Shares

12.13K

Price / share

$40.01

Trade value

$485.16K

% of position

0.5%
11/19/2025
2.22M2.21M

Common Stock

Indirect
S · Sale

Shares

14.32K

Price / share

$40.01

Trade value

$573.14K

% of position

7.8%
11/19/2025
182.53K168.20K

Common Stock

Indirect
S · Sale

Shares

2.00

Price / share

$40.61

Trade value

$81.22

% of position

0.0%
11/19/2025
6.90M6.90M

Common Stock

Indirect
S · Sale

Shares

12.00

Price / share

$40.61

Trade value

$487.32

% of position

0.0%
11/19/2025
662.27K662.25K

Common Stock

Indirect
S · Sale

Shares

8.00

Price / share

$40.61

Trade value

$324.88

% of position

0.0%
11/19/2025
2.21M2.21M

Common Stock

Indirect
S · Sale

Shares

9.00

Price / share

$40.61

Trade value

$365.49

% of position

0.0%
11/19/2025
168.20K168.19K
Total

Net shares

136.35K

Net value

-$5.50M

Derivative Transactions0
No derivative transactions reported
RA CAPITAL MANAGEMENT, L.P. — Insider Transaction (Form 4) Filed Nov 19, 2025 | Finecho