13F Insight
DOSSIER · 13F Holders · Q1 2026Defensive growthQuality
SION

SIONNA THERAPEUTICS INC

124 institutions still hold SIONNA THERAPEUTICS INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 829401108·124 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 5.0%
vs prior quarter
13F value held
$1.6B
63.0% inst. owned
of float
Holders
124
-14 QoQ
filers reporting
Activity
+27 / −10
+808 added · −821 reduced
this quarter
Concentration
24.99%
RA CAPITAL MANAGEMENT, L.P. #1
top holder share
AI Holders Summary · Q1 2026

124 institutions reported SION in Q1 2026. RA CAPITAL MANAGEMENT, L.P. leads at 25.0% of the visible book. -14 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
RA CAPITAL MANAGEMENT, L.P.
CIK 0001346824
$397M9.9M4.21%Q1 202602
TPG GP A, LLC
CIK 0001903793
$260M6.5M7.08%Q1 202603
ORBIMED ADVISORS LLC
CIK 0001055951
$142M3.5M2.82%Q1 202604
VIKING GLOBAL INVESTORS LP
CIK 0001103804
$128M3.2M0.36%Q1 202605
Atlas Venture Life Science Advisors, LLC
CIK 0001917529
$120M3.0M15.20%Q1 202606
Enavate Sciences GP, LLC
CIK 0001953107
$99M2.5M28.26%Q1 202607
JPMORGAN CHASE & CO
CIK 0000019617
$54M1.5M0.00%Q1 202608
BlackRock, Inc.
CIK 0002012383
$52M1.3M0.00%Q1 202609
JENNISON ASSOCIATES LLC
CIK 0000053417
$46M1.1M0.03%Q4 202510
CITADEL ADVISORS LLC
CIK 0001423053
$45M1.1M0.01%Q4 202511
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$41M1.0M0.00%Q1 202612
DEERFIELD MANAGEMENT COMPANY, L.P.
CIK 0001009258
$40M971K0.51%Q4 202513
STATE STREET CORP
CIK 0000093751
$30M756K0.00%Q1 202614
PERCEPTIVE ADVISORS LLC
CIK 0001224962
$26M658K0.52%Q1 202615
EVENTIDE ASSET MANAGEMENT, LLC
CIK 0001442891
$26M646K0.43%Q1 202616
Aberdeen Group plc
CIK 0001716774
$23M564K0.04%Q1 202617
BAKER BROS. ADVISORS LP
CIK 0001263508
$16M400K0.10%Q4 202518
Kalehua Capital Management LLC
CIK 0002106181
$16M394K6.08%Q1 202619
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$16M390K0.00%Q1 202620
Siren, L.L.C.
CIK 0002005245
$12M300K0.33%Q1 2026
Page 1 of 7
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