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Sionna Therapeutics (SION) Insider Trading & Ownership

Sionna Therapeutics logo
$45.95 +1.72 (+3.89%)
Closing price 05/11/2026 04:00 PM Eastern
Extended Trading
$45.94 -0.01 (-0.01%)
As of 06:26 AM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Sionna Therapeutics (NASDAQ:SION) Insider Buying and Selling Activity

Current
Insider Ownership
Percentage
3.90%
Number Of
Insiders Buying
(Last 12 Months)
1
Amount Of
Insider Buying
(Last 12 Months)
$950.40K
Number Of
Insiders Selling
(Last 12 Months)
13
Amount Of
Insider Selling
(Last 12 Months)
$153.24M
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SION Insider Buying and Selling by Quarter

Sionna Therapeutics Insider and Congressional Trades History

Export
Transaction DateInsiderBuy/SellNumber of SharesAverage Share PriceTotal TransactionDetails
5/11/2026
Orbimed Advisors Llc
Director
Sell184,639$46.22$8,534,014.58  
5/8/2026
Orbimed Advisors Llc
Director
Sell59,767$44.58$2,664,412.86  
5/7/2026
Orbimed Advisors Llc
Director
Sell48,546$44.61$2,165,637.06  
4/18/2026
Orbimed Advisors Llc
Director
Sell2,948$44.52$131,244.96  
4/18/2026
Peter A Thompson
Peter A Thompson
Director
Sell2,948$44.52$131,244.96  
4/17/2026
Orbimed Advisors Llc
Director
Sell52,397$44.68$2,341,097.96  
4/17/2026
Peter A Thompson
Peter A Thompson
Director
Sell52,397$44.68$2,341,097.96  
4/16/2026
Orbimed Advisors Llc
Director
Sell226,906$45.34$10,287,918.04  
4/16/2026
Peter A Thompson
Peter A Thompson
Director
Sell226,906$45.34$10,287,918.04  
4/15/2026
Orbimed Advisors Llc
Director
Sell235,863$44.64$10,528,924.32  
4/15/2026
Peter A Thompson
Peter A Thompson
Director
Sell235,863$44.64$10,528,924.32  
4/14/2026
Orbimed Advisors Llc
Director
Sell47,814$44.51$2,128,201.14  
4/14/2026
Peter A Thompson
Peter A Thompson
Director
Sell47,814$44.51$2,128,201.14  
2/3/2026
Orbimed Advisors Llc
Director
Sell29,063$44.58$1,295,628.54  
2/3/2026
Peter A Thompson
Peter A Thompson
Director
Sell29,063$44.58$1,295,628.54  
2/2/2026
Orbimed Advisors Llc
Director
Sell1,890$44.57$84,237.30  
2/2/2026
Peter A Thompson
Peter A Thompson
Director
Sell1,890$44.57$84,237.30  
1/22/2026
Tpg Gp A, Llc
Major Shareholder
Sell250,000$40.00$10,000,000.00  
12/24/2025
Orbimed Advisors Llc
Director
Sell33,356$44.55$1,486,009.80  
12/24/2025
Peter A Thompson
Peter A Thompson
Director
Sell33,356$44.55$1,486,009.80  
12/19/2025
Orbimed Advisors Llc
Director
Sell875$44.49$38,928.75  
12/19/2025
Peter A Thompson
Peter A Thompson
Director
Sell875$44.49$38,928.75  
12/18/2025
Orbimed Advisors Llc
Director
Sell100$44.49$4,449.00  
12/18/2025
Peter A Thompson
Peter A Thompson
Director
Sell100$44.49$4,449.00  
12/17/2025
Orbimed Advisors Llc
Director
Sell900$44.50$40,050.00  
12/17/2025
Peter A Thompson
Peter A Thompson
Director
Sell900$44.50$40,050.00  
11/26/2025
Orbimed Advisors Llc
Director
Sell1,600$44.49$71,184.00  
11/26/2025
Peter A Thompson
Peter A Thompson
Director
Sell1,600$44.49$71,184.00  
11/25/2025
Orbimed Advisors Llc
Director
Sell11,890$44.60$530,294.00  
11/25/2025
Peter A Thompson
Peter A Thompson
Director
Sell11,890$44.60$530,294.00  
11/24/2025
Orbimed Advisors Llc
Director
Sell94,583$44.54$4,212,726.82  
11/24/2025
Peter A Thompson
Peter A Thompson
Director
Sell94,583$44.54$4,212,726.82  
11/21/2025
Ra Capital Management, L.P.
Director
Sell25,183$39.50$994,728.50  
11/20/2025
Ra Capital Management, L.P.
Director
Sell5,133$40.13$205,987.29  
11/19/2025
Ra Capital Management, L.P.
Director
Sell47,442$40.01$1,898,154.42  
11/18/2025
Ra Capital Management, L.P.
Director
Sell6,922$39.57$273,903.54  
11/17/2025
Ra Capital Management, L.P.
Director
Sell81,987$40.59$3,327,852.33  
10/28/2025
Ra Capital Management, L.P.
Director
Sell62,610$39.58$2,478,103.80  
10/24/2025
Ra Capital Management, L.P.
Director
Sell311,000$39.50$12,284,500.00  
10/21/2025
Bruce Booth
Bruce Booth
Director
Sell88,878$34.22$3,041,405.16  
10/21/2025
Michael Cloonan
Michael Cloonan
CEO
Sell99,800$36.26$3,618,748.00  
10/20/2025
Bruce Booth
Bruce Booth
Director
Sell55,985$32.09$1,796,558.65  
10/17/2025
Bruce Booth
Bruce Booth
Director
Sell61,124$32.37$1,978,583.88  
10/16/2025
Bruce Booth
Bruce Booth
Director
Sell169,260$32.35$5,475,561.00  
10/16/2025
Michael Cloonan
Michael Cloonan
CEO
Sell10,425$31.51$328,491.75  
10/15/2025
Bruce Booth
Bruce Booth
Director
Sell115,856$30.61$3,546,352.16  
10/15/2025
Michael Cloonan
Michael Cloonan
CEO
Sell14,775$31.11$459,650.25  
10/14/2025
Bruce Booth
Bruce Booth
Director
Sell606$29.95$18,149.70  
10/13/2025
Bruce Booth
Bruce Booth
Director
Sell58,232$30.38$1,769,088.16  
10/10/2025
Bruce Booth
Bruce Booth
Director
Sell20,238$29.98$606,735.24  
10/6/2025
Bruce Booth
Bruce Booth
Director
Sell11,800$29.95$353,410.00  
10/3/2025
Bruce Booth
Bruce Booth
Director
Sell37,746$30.00$1,132,380.00  
10/1/2025
Bruce Booth
Bruce Booth
Director
Sell200$29.95$5,990.00  
9/30/2025
Bruce Booth
Bruce Booth
Director
Sell12,388$30.06$372,383.28  
9/29/2025
Bruce Booth
Bruce Booth
Director
Sell66,105$30.09$1,989,099.45  
9/29/2025
Michael Cloonan
Michael Cloonan
CEO
Sell7,793$29.70$231,452.10  
9/26/2025
Michael Cloonan
Michael Cloonan
CEO
Sell17,207$28.85$496,421.95  
9/2/2025
Elena Ridloff
Elena Ridloff
CFO
Sell8,836$25.08$221,606.88  
8/29/2025
Elena Ridloff
Elena Ridloff
CFO
Sell748$25.18$18,834.64  
8/28/2025
Elena Ridloff
Elena Ridloff
CFO
Sell16,098$25.97$418,065.06  
8/27/2025
Elena Ridloff
Elena Ridloff
CFO
Sell3,618$25.10$90,811.80  
8/27/2025
Michael Cloonan
Michael Cloonan
CEO
Sell7,426$25.01$185,724.26  
8/26/2025
Elena Ridloff
Elena Ridloff
CFO
Sell3,700$25.13$92,981.00  
8/26/2025
Michael Cloonan
Michael Cloonan
CEO
Sell17,574$24.96$438,647.04  
6/27/2025
Tpg Gp A, Llc
Major Shareholder
Buy60,000$15.84$950,400.00  
(Data available from 1/1/2013 forward)

SION Insider Trading Activity - Frequently Asked Questions

The list of insiders at Sionna Therapeutics includes Bruce Booth, Elena Ridloff, Michael Cloonan, Orbimed Advisors Llc, Peter A Thompson, Ra Capital Management, L.P., and Tpg Gp A, Llc. Learn more on insiders at SION.

3.90% of Sionna Therapeutics stock is owned by insiders. Learn more on SION's insider holdings.

The following insider purchased SION shares in the last 24 months: Tpg Gp A, Llc ($950,400.00).

Insiders have purchased a total of 60,000 SION shares in the last 24 months for a total of $950,400.00 bought.

The following insiders have sold SION shares in the last 24 months: Bruce Booth ($22,085,696.68), Elena Ridloff ($842,299.38), Michael Cloonan ($5,759,135.35), Orbimed Advisors Llc ($46,544,959.13), Peter A Thompson ($46,544,959.13), Ra Capital Management, L.P. ($21,463,229.88), and Tpg Gp A, Llc ($10,000,000.00).

Insiders have sold a total of 3,762,969 Sionna Therapeutics shares in the last 24 months for a total of $153,240,279.55 sold.

Sionna Therapeutics Active Insiders


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This page (NASDAQ:SION) was last updated on 5/12/2026 by MarketBeat.com Staff.
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