RA CAPITAL MANAGEMENT, L.P.

PrivateCIK: 1346824
Location

BOSTON, MA

RA CAPITAL MANAGEMENT, L.P. purchased 81.8% of their position (2.84M shares) of HEMAB THERAPEUTICS HOLDINGS, INC. on the open market

Open‑market purchase worth $52.22M — a major conviction buy. The strongest form of insider conviction signal.

P · 6 purchases
Director10% Owner
Since Apr 2026
+7.46M
Net shares
Net buyer
$52.22M
Total acquired
6
Open market trades
6B · 0S
15
Total transactions
7.68M acquired · 219.91K disposed
Non-Derivative Transactions9

Common Stock

Indirect
C · Conversion

Shares

+3.61M

Price / share

Trade value

% of position

New position
5/4/2026
0.003.61M

Common Stock

Indirect
C · Conversion

Shares

+1.01M

Price / share

Trade value

% of position

New position
5/4/2026
0.001.01M

Common Stock

Indirect
C · Conversion

Shares

+221.19K

Price / share

Trade value

% of position

New position
5/4/2026
0.00221.19K

Common Stock

Indirect
P · Purchase

Shares

+2.54M

Price / share

$18.00

Trade value

$45.74M

% of position

70.4%
5/4/2026
3.61M6.15M

Common Stock

Indirect
P · Purchase

Shares

+133.75K

Price / share

$18.00

Trade value

$2.41M

% of position

60.5%
5/4/2026
221.19K354.94K

Common Stock

Indirect
P · Purchase

Shares

+87.14K

Price / share

$24.59

Trade value

$2.14M

% of position

1.4%
5/5/2026
6.15M6.24M

Common Stock

Indirect
P · Purchase

Shares

+10.27K

Price / share

$25.00

Trade value

$256.70K

% of position

0.2%
5/5/2026
6.24M6.25M

Common Stock

Indirect
P · Purchase

Shares

+14.61K

Price / share

$23.77

Trade value

$347.30K

% of position

0.2%
5/6/2026
6.25M6.26M

Common Stock

Indirect
P · Purchase

Shares

+53.41K

Price / share

$24.83

Trade value

$1.33M

% of position

0.9%
5/6/2026
6.26M6.31M
Total

Net shares

+7.68M

Net value

$52.22M

Derivative Transactions6

Series A Preferred Stock

Indirect
C · Conversion
Converts to

Common Stock

1.42M shares

Shares

64.68K

Strike price

Held after

0.00

Exercisable

5/4/2026

Series A Preferred Stock

Indirect
C · Conversion
Converts to

Common Stock

609.84K shares

Shares

27.72K

Strike price

Held after

0.00

Exercisable

5/4/2026

Series B Preferred Stock

Indirect
C · Conversion
Converts to

Common Stock

931.50K shares

Shares

42.34K

Strike price

Held after

0.00

Exercisable

5/4/2026

Series B Preferred Stock

Indirect
C · Conversion
Converts to

Common Stock

399.21K shares

Shares

18.15K

Strike price

Held after

0.00

Exercisable

5/4/2026

Series C Preferred Stock

Indirect
C · Conversion
Converts to

Common Stock

1.25M shares

Shares

56.97K

Strike price

Held after

0.00

Exercisable

5/4/2026

Series C Preferred Stock

Indirect
C · Conversion
Converts to

Common Stock

221.19K shares

Shares

10.05K

Strike price

Held after

0.00

Exercisable

5/4/2026
RA CAPITAL MANAGEMENT, L.P. — Insider Transaction (Form 4) Filed May 6, 2026 | Finecho