SIONNA THERAPEUTICS, INC.

PublicCIK: 2036042
SIONNASDAQ
Location

WALTHAM, MA

Total Insiders

31

Active leadership & owners

Board Directors

18

Governing body

Corporate Officers

5

Executive management

10%+ Owners

13

Major shareholders

Active Insiders

31

Currently serving

Former Insiders

0

Past roles

ATLAS VENTURE ASSOCIATES OPPORTUNITY II, LLC
10% Owner
Position
TenureSince Feb 2025
Holdings
ATLAS VENTURE ASSOCIATES OPPORTUNITY II, LP
10% Owner
Position
TenureSince Feb 2025
Holdings
ATLAS VENTURE ASSOCIATES XI, L.P.
10% Owner
Position
TenureSince Feb 2025
Holdings
ATLAS VENTURE ASSOCIATES XI, LLC
10% Owner
Position
TenureSince Feb 2025
Holdings
ATLAS VENTURE FUND XI, L.P.
10% Owner
Position
TenureSince Feb 2025
Holdings
ATLAS VENTURE OPPORTUNITY FUND II, L.P.
10% Owner
Position
TenureSince Feb 2025
Holdings
COULTER JAMES G
10% Owner
Position
TenureSince Feb 2025
Holdings
KOLCHINSKY PETER
Director10% Owner
Position
TenureSince Feb 2025
Holdings
RA CAPITAL HEALTHCARE FUND LP
Director10% Owner
Position
TenureSince Feb 2025
Holdings
RA CAPITAL MANAGEMENT, L.P.
Director10% Owner
Position
TenureSince Feb 2025
Holdings
Page 1 of 4