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CIK 0002036042 · Non-accelerated filer<br>Smaller reporting company<br>Emerging growth company

Sionna Therapeutics, Inc.

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Ticker
SION
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
FY end
Dec 31
Incorporated
DE
Entity type
operating
Phone
617-819-2020
Business address
21 HICKORY DRIVE, SUITE 500, WALTHAM, MA, 02451
Open-market buys, last 90 days
$0
in 0 filings
Open-market sales, last 90 days
$21,835,018
in 1 filing

Net −$21,835,018. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. RA CAPITAL MANAGEMENT, L.P. −$21.8M Director sold 50% of stake
Date Insider Transaction Shares Price Value Owned after
2025-10-28 RA CAPITAL MANAGEMENT, L.P. Director Sale −17,118 $39.58 $678K 2,240,708
2025-10-28 RA CAPITAL MANAGEMENT, L.P. Director Sale −10,476 $39.58 $415K 209,391
2025-10-24 RA CAPITAL MANAGEMENT, L.P. Director Sale −14,116 $39.50 $558K 6,909,249
2025-10-24 RA CAPITAL MANAGEMENT, L.P. Director Sale −122,271 $39.50 $4.8M 747,380
2025-10-24 RA CAPITAL MANAGEMENT, L.P. Director Sale −66,672 $39.50 $2.6M 2,257,826
2025-10-24 RA CAPITAL MANAGEMENT, L.P. Director Sale −107,941 $39.50 $4.3M 219,867
2025-10-21 Cloonan Michael President & CEO Option exercise 10b5-1 +13,324 $6.11 $81K 560,667
2025-10-21 Cloonan Michael President & CEO Sale 10b5-1 −13,324 $34.44 $459K 547,343
2025-10-21 Cloonan Michael President & CEO Option exercise 10b5-1 +30,049 $6.11 $184K 577,392
2025-10-21 Cloonan Michael President & CEO Sale 10b5-1 −30,049 $35.63 $1.1M 547,343
2025-10-21 Cloonan Michael President & CEO Option exercise 10b5-1 +22,895 $6.11 $140K 570,238
2025-10-21 Cloonan Michael President & CEO Sale 10b5-1 −22,895 $36.60 $838K 547,343
2025-10-21 Cloonan Michael President & CEO Option exercise 10b5-1 +33,532 $6.11 $205K 580,875
2025-10-21 Cloonan Michael President & CEO Sale 10b5-1 −33,532 $37.31 $1.3M 547,343
2025-10-21 Cloonan Michael President & CEO Option exercise · Non-Qualified Stock Option (right to buy) 10b5-1 −13,324 139,618
2025-10-21 Cloonan Michael President & CEO Option exercise · Non-Qualified Stock Option (right to buy) 10b5-1 −30,049 109,569
2025-10-21 Cloonan Michael President & CEO Option exercise · Non-Qualified Stock Option (right to buy) 10b5-1 −22,895 86,674
2025-10-21 Cloonan Michael President & CEO Option exercise · Non-Qualified Stock Option (right to buy) 10b5-1 −33,532 53,142
2025-10-21 Booth Bruce Director Sale 10b5-1 −22,339 $32.69 $730K 2,360,156
2025-10-21 Booth Bruce Director Sale 10b5-1 −4,688 $32.69 $153K 697,297

Page 7 of 15 · 284 trades