Sionna Therapeutics (SION) Insider Trading & Ownership

$38.55 +1.25 (+3.36%)

As of 10:22 AM Eastern

Current Insider Ownership Percentage: 5.10%
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): $153.25M

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SION Insider Buying and Selling by Quarter

Sionna Therapeutics Insider and Congressional Trades History

Transaction Type

Time Frame

Start Date

End Date

Export

Transaction Date	Insider	Buy/Sell	Number of Shares	Average Share Price	Total Transaction
5/27/2026	Orbimed Advisors Llc Director	Sell	101	$44.49	$4,493.49
5/27/2026	Peter A Thompson Director	Sell	101	$44.49	$4,493.49
5/11/2026	Orbimed Advisors Llc Director	Sell	184,639	$46.22	$8,534,014.58
5/11/2026	Peter A Thompson Director	Sell	184,639	$46.22	$8,534,014.58
5/8/2026	Orbimed Advisors Llc Director	Sell	59,767	$44.58	$2,664,412.86
5/8/2026	Peter A Thompson Director	Sell	59,767	$44.58	$2,664,412.86
5/7/2026	Orbimed Advisors Llc Director	Sell	48,546	$44.61	$2,165,637.06
5/7/2026	Peter A Thompson Director	Sell	48,546	$44.61	$2,165,637.06
4/18/2026	Orbimed Advisors Llc Director	Sell	2,948	$44.52	$131,244.96
4/18/2026	Peter A Thompson Director	Sell	2,948	$44.52	$131,244.96
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4/17/2026	Orbimed Advisors Llc Director	Sell	52,397	$44.68	$2,341,097.96
4/17/2026	Peter A Thompson Director	Sell	52,397	$44.68	$2,341,097.96
4/16/2026	Orbimed Advisors Llc Director	Sell	226,906	$45.34	$10,287,918.04
4/16/2026	Peter A Thompson Director	Sell	226,906	$45.34	$10,287,918.04
4/15/2026	Orbimed Advisors Llc Director	Sell	235,863	$44.64	$10,528,924.32
4/15/2026	Peter A Thompson Director	Sell	235,863	$44.64	$10,528,924.32
4/14/2026	Orbimed Advisors Llc Director	Sell	47,814	$44.51	$2,128,201.14
4/14/2026	Peter A Thompson Director	Sell	47,814	$44.51	$2,128,201.14
2/3/2026	Orbimed Advisors Llc Director	Sell	29,063	$44.58	$1,295,628.54
2/3/2026	Peter A Thompson Director	Sell	29,063	$44.58	$1,295,628.54
2/2/2026	Orbimed Advisors Llc Director	Sell	1,890	$44.57	$84,237.30
2/2/2026	Peter A Thompson Director	Sell	1,890	$44.57	$84,237.30
1/22/2026	Tpg Gp A, Llc Major Shareholder	Sell	250,000	$40.00	$10,000,000.00
12/24/2025	Orbimed Advisors Llc Director	Sell	33,356	$44.55	$1,486,009.80
12/24/2025	Peter A Thompson Director	Sell	33,356	$44.55	$1,486,009.80
12/19/2025	Orbimed Advisors Llc Director	Sell	875	$44.49	$38,928.75
12/19/2025	Peter A Thompson Director	Sell	875	$44.49	$38,928.75
12/18/2025	Orbimed Advisors Llc Director	Sell	100	$44.49	$4,449.00
12/18/2025	Peter A Thompson Director	Sell	100	$44.49	$4,449.00
12/17/2025	Orbimed Advisors Llc Director	Sell	900	$44.50	$40,050.00
12/17/2025	Peter A Thompson Director	Sell	900	$44.50	$40,050.00
11/26/2025	Orbimed Advisors Llc Director	Sell	1,600	$44.49	$71,184.00
11/26/2025	Peter A Thompson Director	Sell	1,600	$44.49	$71,184.00
11/25/2025	Orbimed Advisors Llc Director	Sell	11,890	$44.60	$530,294.00
11/25/2025	Peter A Thompson Director	Sell	11,890	$44.60	$530,294.00
11/24/2025	Orbimed Advisors Llc Director	Sell	94,583	$44.54	$4,212,726.82
11/24/2025	Peter A Thompson Director	Sell	94,583	$44.54	$4,212,726.82
11/21/2025	Ra Capital Management, L.P. Director	Sell	25,183	$39.50	$994,728.50
11/20/2025	Ra Capital Management, L.P. Director	Sell	5,133	$40.13	$205,987.29
11/19/2025	Ra Capital Management, L.P. Director	Sell	47,442	$40.01	$1,898,154.42
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11/18/2025	Ra Capital Management, L.P. Director	Sell	6,922	$39.57	$273,903.54
11/17/2025	Ra Capital Management, L.P. Director	Sell	81,987	$40.59	$3,327,852.33
10/28/2025	Ra Capital Management, L.P. Director	Sell	62,610	$39.58	$2,478,103.80
10/24/2025	Ra Capital Management, L.P. Director	Sell	311,000	$39.50	$12,284,500.00
10/21/2025	Bruce Booth Director	Sell	88,878	$34.22	$3,041,405.16
10/21/2025	Michael Cloonan CEO	Sell	99,800	$36.26	$3,618,748.00
10/20/2025	Bruce Booth Director	Sell	55,985	$32.09	$1,796,558.65
10/17/2025	Bruce Booth Director	Sell	61,124	$32.37	$1,978,583.88
10/16/2025	Bruce Booth Director	Sell	169,260	$32.35	$5,475,561.00
10/16/2025	Michael Cloonan CEO	Sell	10,425	$31.51	$328,491.75
10/15/2025	Bruce Booth Director	Sell	115,856	$30.61	$3,546,352.16
10/15/2025	Michael Cloonan CEO	Sell	14,775	$31.11	$459,650.25
10/14/2025	Bruce Booth Director	Sell	606	$29.95	$18,149.70
10/13/2025	Bruce Booth Director	Sell	58,232	$30.38	$1,769,088.16
10/10/2025	Bruce Booth Director	Sell	20,238	$29.98	$606,735.24
10/6/2025	Bruce Booth Director	Sell	11,800	$29.95	$353,410.00
10/3/2025	Bruce Booth Director	Sell	37,746	$30.00	$1,132,380.00
10/1/2025	Bruce Booth Director	Sell	200	$29.95	$5,990.00
9/30/2025	Bruce Booth Director	Sell	12,388	$30.06	$372,383.28
9/29/2025	Bruce Booth Director	Sell	66,105	$30.09	$1,989,099.45
9/29/2025	Michael Cloonan CEO	Sell	7,793	$29.70	$231,452.10
9/26/2025	Michael Cloonan CEO	Sell	17,207	$28.85	$496,421.95
9/2/2025	Elena Ridloff CFO	Sell	8,836	$25.08	$221,606.88
8/29/2025	Elena Ridloff CFO	Sell	748	$25.18	$18,834.64
8/28/2025	Elena Ridloff CFO	Sell	16,098	$25.97	$418,065.06
8/27/2025	Elena Ridloff CFO	Sell	3,618	$25.10	$90,811.80
8/27/2025	Michael Cloonan CEO	Sell	7,426	$25.01	$185,724.26
8/26/2025	Elena Ridloff CFO	Sell	3,700	$25.13	$92,981.00
8/26/2025	Michael Cloonan CEO	Sell	17,574	$24.96	$438,647.04
6/27/2025	Tpg Gp A, Llc Major Shareholder	Buy	60,000	$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.

5.10% 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 ($46,549,452.62), Peter A Thompson ($46,549,452.62), Ra Capital Management, L.P. ($21,463,229.88), and Tpg Gp A, Llc ($10,000,000.00).

Insiders have sold a total of 3,763,171 Sionna Therapeutics shares in the last 24 months for a total of $153,249,266.53 sold.

Sionna Therapeutics Active Insiders

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This page (NASDAQ:SION) was last updated on 6/22/2026 by MarketBeat.com Staff.

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Sionna Therapeutics (SION) Insider Trading & Ownership

SION Insider Buying and Selling by Quarter

Sionna Therapeutics Insider and Congressional Trades History

SION Insider Trading Activity - Frequently Asked Questions

Sionna Therapeutics Active Insiders

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Sionna Therapeutics (SION) Insider Trading & Ownership

Sionna Therapeutics (NASDAQ:SION) Insider Buying and Selling Activity

SION Insider Buying and Selling by Quarter

Sionna Therapeutics Insider and Congressional Trades History

SION Insider Trading Activity - Frequently Asked Questions

Who is on Sionna Therapeutics' Insider Roster?

What percentage of Sionna Therapeutics stock is owned by insiders?

Which Sionna Therapeutics insiders have been buying company stock?

How much insider buying is happening at Sionna Therapeutics?

Which Sionna Therapeutics insiders have been selling company stock?

How much insider selling is happening at Sionna Therapeutics?

Sionna Therapeutics Active Insiders

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