Sionna Therapeutics Ownership | Who Owns Sionna Therapeutics?

Sionna Therapeutics Ownership Summary

Sionna Therapeutics is owned by 15.10% institutional investors, 6.93% insiders, and 77.98% retail investors. Ra capital management is the largest institutional shareholder, holding 23.68% of SION shares.

SION Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Sionna Therapeutics	15.10%	6.93%	77.98%
Sector	Healthcare Stocks	232.20%	10.74%	-142.94%
Industry	Biotech Stocks	382.11%	10.55%	-292.66%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Ra capital management	10.45M	23.68%	$307.20M
Tpg gp a	6.74M	15.29%	$198.37M
Orbimed advisors	3.70M	8.40%	$108.96M
Atlas venture life science advisors	3.62M	8.20%	$106.33M
Viking global investors lp	3.20M	7.24%	$93.97M
Enavate sciences gp	2.48M	5.62%	$72.88M
Blackrock funding, inc. /de	1.29M	2.90%	$53.14M
Jpmorgan chase	1.23M	2.77%	$50.68M
Perceptive advisors	1.18M	2.67%	$34.68M
Vanguard group	1.18M	2.67%	$48.75M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Enavate sciences gp	2.48M	22.25%	$72.88M
Atlas venture life science advisors	3.62M	14.13%	$106.33M
Tpg gp a	6.74M	10.80%	$198.37M
Ra capital management	10.45M	3.79%	$307.20M
Orbimed advisors	3.70M	2.57%	$108.96M
Perceptive advisors	1.18M	1.00%	$34.68M
Deerfield management company, l.p. (series c)	970.59K	0.44%	$28.55M
Soleus capital management	268.50K	0.41%	$11.05M
Siren	325.00K	0.37%	$9.56M
Braidwell lp	314.01K	0.27%	$9.24M

Top Buyers

Holder	Shares	% Assets	Change
State street	693.39K	0.00%	453.20K
Blackrock funding, inc. /de	1.29M	0.00%	446.99K
Jennison associates	1.12M	0.03%	117.90K
Ensign peak advisors	79.86K	0.01%	79.86K
Geode capital management	380.04K	0.00%	63.48K

Top Sellers

Holder	Shares	% Assets	Change
Braidwell lp	314.01K	0.27%	-767.84K
Jpmorgan chase	1.23M	0.00%	-746.81K
Zimmer partners, lp	-	-	-237.50K
Price t rowe associates inc /md/	637.76K	0.00%	-223.48K
Soleus capital management	268.50K	0.41%	-145.00K

New Positions

Holder	Shares	% Assets	Change	Value
Ensign peak advisors	79.86K	0.01%	79.86K	$3.29M
Longaeva partners	61.46K	0.26%	61.46K	$1.81M
Seven grand managers	50.00K	0.16%	50.00K	$2.06M
Wellington management group llp	42.23K	0.00%	42.23K	$1.24M
Alps advisors	36.65K	0.01%	36.65K	$1.51M

Sold Out

Holder	Change
Srs capital advisors	-92.00
Federated hermes	-113.00
Strs ohio	-2.30K
Two sigma investments, lp	-11.71K
Balyasny asset management	-13.06K

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	40	-48.72%	6,711,927	-84.33%	15	0.16%	29	-25.64%	7	-63.16%
Sep 30, 2025	29	-55.38%	6,672,182	-84.64%	15	0.16%	18	-59.09%	6	-40.00%
Jun 30, 2025	65	38.30%	43,448,395	4.72%	98	0.40%	44	-6.38%	10	-
Mar 31, 2025	47	-	41,491,947	-	156	-	47	-	-	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Feb 02, 2026	Thompson Peter A.	-	Sell	$84.24K
Feb 03, 2026	Thompson Peter A.	-	Sell	$1.30M
Feb 03, 2026	ORBIMED ADVISORS LLC	-	Sell	$1.30M
Feb 02, 2026	ORBIMED ADVISORS LLC	-	Sell	$84.24K
Jan 22, 2026	TPG GP A, LLC	-	Sell	$10.00M

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	5
2025 Q4	-	112
2025 Q3	-	17
2025 Q2	1	-

SION Ownership FAQ

Who Owns Sionna Therapeutics?

Sionna Therapeutics shareholders are primarily institutional investors at 15.10%, followed by 6.93% insiders and 77.97% retail investors. The average institutional ownership in Sionna Therapeutics's industry, Biotech Stocks , is 382.11%, which Sionna Therapeutics falls below.

Who owns the most shares of Sionna Therapeutics?

Sionna Therapeutics’s largest shareholders are Ra capital management (10.45M shares, 23.68%), Tpg gp a (6.74M shares, 15.29%), and Orbimed advisors (3.7M shares, 8.40%). Together, they hold 47.36% of Sionna Therapeutics’s total shares outstanding.

Does Blackrock own Sionna Therapeutics?

BlackRock is not among the top 10 institutional shareholders of Sionna Therapeutics.

Who is Sionna Therapeutics’s biggest shareholder by percentage of total assets invested?

Enavate sciences gp is Sionna Therapeutics’s biggest shareholder by percentage of total assets invested, with 22.25% of its assets in 2.48M Sionna Therapeutics shares, valued at 72.88M$.

Try Tickergate Pro Free

Customize Everything. 100% Flexibility. Fast and Easy to Use (No code or Excel Needed)

Customize your own personal stocks lists, views and charts
Choose from hundreds of fields, up to 15 years of history
Conduct deep comparison analysis

Discover trending investment themes
Find your next best investment
Research stocks using tools