Sionna Therapeutics, Inc.

NasdaqGM:SION Stock Report

Market Cap: US$543.6m

Sionna Therapeutics Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NasdaqGM:SION Recent Insider Transactions by Companies or Individuals
DateValueNameEntityRoleSharesMax Price
10 Feb 25BuyUS$9,900,000Sionna Investment Managers Inc.Company550,000US$18.00
10 Feb 25BuyUS$9,900,000OrbiMed Advisors LLCCompany550,000US$18.00
10 Feb 25BuyUS$1,080,000Atlas Venture L.P.Company60,000US$18.00
10 Feb 25BuyUS$20,250,000RA Capital Management, L.P.Company1,125,000US$18.00
10 Feb 25BuyUS$20,250,000TPG Capital, L.P.Company1,125,000US$18.00

Insider Trading Volume

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of SION?
Owner TypeNumber of SharesOwnership Percentage
Individual Insiders699,2901.58%
Hedge Funds2,952,7546.69%
Institutions4,621,98310.5%
General Public11,321,10425.7%
VC/PE Firms24,529,26355.6%

Dilution of Shares: SION only recently listed within the past 12 months

Top Shareholders

Top 19 shareholders own 74.18% of the company
OwnershipNameSharesCurrent ValueChange %Portfolio %
23.7%
RA Capital Management, L.P.
10,445,322US$128.7m755%2.07%
15.2%
TPG Capital, L.P.
6,684,962US$82.4m877%0.28%
8.4%
OrbiMed Advisors LLC
3,704,959US$45.6m0%0.77%
8.37%
Atlas Venture L.P.
3,694,020US$45.5m0%9.16%
6.69%
Viking Global Investors LP
2,952,754US$36.4m0%0.12%
5.62%
Sionna Investment Managers Inc.
2,478,030US$30.5m0%9.08%
1.95%
Jennison Associates LLC
859,927US$10.6m0%0.01%
1.24%
Michael Cloonan
547,343US$6.7m0%no data
1.13%
Franklin Resources, Inc.
500,000US$6.2m0%no data
0.47%
Columbia Management Investment Advisers, LLC
209,266US$2.6m0%no data
0.45%
BlackRock, Inc.
198,396US$2.4m0%no data
0.34%
Nantahala Capital Management, LLC
147,833US$1.8m0%0.15%
0.28%
Elena Ridloff
123,532US$1.5m0%no data
0.13%
TD Asset Management, Inc.
55,366US$682.1k0%no data
0.09%
The Vanguard Group, Inc.
39,718US$489.3k0%no data
0.065%
JP Morgan Asset Management
28,795US$354.8k0%no data
0.064%
Charlotte McKee
28,415US$350.1k0%no data
0.062%
Driehaus Capital Management LLC
27,140US$334.4k0%no data
0.015%
T. Rowe Price Group, Inc.
6,723US$82.8k0%no data

Company Analysis and Financial Data Status

DataLast Updated (UTC time)
Company Analysis2025/05/11 05:34
End of Day Share Price 2025/05/09 00:00
Earnings2024/12/31
Annual Earnings2024/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

PackageDataTimeframeExample US Source *
Company Financials10 years
  • Income statement
  • Cash flow statement
  • Balance sheet
Analyst Consensus Estimates+3 years
  • Forecast financials
  • Analyst price targets
Market Prices30 years
  • Stock prices
  • Dividends, Splits and Actions
Ownership10 years
  • Top shareholders
  • Insider trading
Management10 years
  • Leadership team
  • Board of directors
Key Developments10 years
  • Company announcements

* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

Sionna Therapeutics, Inc. is covered by 4 analysts. 3 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

AnalystInstitution
Salveen RichterGoldman Sachs
Yatin SunejaGuggenheim Securities, LLC
Paul MatteisStifel, Equities Research