RA CAPITAL MANAGEMENT, L.P.

PrivateCIK: 1346824
Location

BOSTON, MA

RA CAPITAL MANAGEMENT, L.P. sold 16.0% of their position (30.32K shares) of SIONNA THERAPEUTICS, INC. on the open market

Open‑market sale worth $1.20M — a significant reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 12 sales
InsiderRA CAPITAL MANAGEMENT, L.P.CIK 1346824
IssuerSIONNA THERAPEUTICS, INC.CIK 2036042
Director10% Owner
Since Feb 2025
-30.32K
Net shares
Net seller
$1.20M
Total sold
12
Open market trades
0B · 12S
12
Total transactions
30.32K disposed
Non-Derivative Transactions12

Common Stock

Indirect
S · Sale

Shares

150.00

Price / share

$39.89

Trade value

$5.98K

% of position

0.0%
11/20/2025
6.90M6.90M

Common Stock

Indirect
S · Sale

Shares

1.24K

Price / share

$39.89

Trade value

$49.26K

% of position

0.2%
11/20/2025
662.25K661.02K

Common Stock

Indirect
S · Sale

Shares

801.00

Price / share

$39.89

Trade value

$31.95K

% of position

0.0%
11/20/2025
2.21M2.21M

Common Stock

Indirect
S · Sale

Shares

947.00

Price / share

$39.89

Trade value

$37.78K

% of position

0.6%
11/20/2025
168.19K167.25K

Common Stock

Indirect
S · Sale

Shares

96.00

Price / share

$40.50

Trade value

$3.89K

% of position

0.0%
11/20/2025
6.90M6.90M

Common Stock

Indirect
S · Sale

Shares

788.00

Price / share

$40.50

Trade value

$31.91K

% of position

0.1%
11/20/2025
661.02K660.23K

Common Stock

Indirect
S · Sale

Shares

512.00

Price / share

$40.50

Trade value

$20.74K

% of position

0.0%
11/20/2025
2.21M2.20M

Common Stock

Indirect
S · Sale

Shares

604.00

Price / share

$40.50

Trade value

$24.46K

% of position

0.4%
11/20/2025
167.25K166.64K

Common Stock

Indirect
S · Sale

Shares

1.21K

Price / share

$39.50

Trade value

$47.80K

% of position

0.0%
11/21/2025
6.90M6.90M

Common Stock

Indirect
S · Sale

Shares

9.92K

Price / share

$39.50

Trade value

$392K

% of position

1.5%
11/21/2025
660.23K650.31K

Common Stock

Indirect
S · Sale

Shares

6.44K

Price / share

$39.50

Trade value

$254.38K

% of position

0.3%
11/21/2025
2.20M2.20M

Common Stock

Indirect
S · Sale

Shares

7.61K

Price / share

$39.50

Trade value

$300.56K

% of position

4.6%
11/21/2025
166.64K159.03K
Total

Net shares

30.32K

Net value

-$1.20M

Derivative Transactions0
No derivative transactions reported
RA CAPITAL MANAGEMENT, L.P. — Insider Transaction (Form 4) Filed Nov 24, 2025 | Finecho