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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
2025-10-16 Booth Bruce Director Sale 10b5-1 −45,117 $31.69 $1.4M 2,565,472
2025-10-16 Booth Bruce Director Sale 10b5-1 −9,470 $31.69 $300K 740,390
2025-10-16 Booth Bruce Director Sale 10b5-1 −73,296 $32.84 $2.4M 2,492,176
2025-10-16 Booth Bruce Director Sale 10b5-1 −15,384 $32.84 $505K 725,006
2025-10-16 Booth Bruce Director Sale 10b5-1 −12,888 $33.38 $430K 2,479,288
2025-10-16 Booth Bruce Director Sale 10b5-1 −2,705 $33.38 $90K 722,301
2025-10-16 Cloonan Michael President & CEO Option exercise 10b5-1 +10,225 $6.11 $62K 557,568
2025-10-16 Cloonan Michael President & CEO Sale 10b5-1 −10,225 $31.46 $322K 547,343
2025-10-16 Cloonan Michael President & CEO Option exercise 10b5-1 +200 $6.11 $1K 547,543
2025-10-16 Cloonan Michael President & CEO Sale 10b5-1 −200 $34.00 $7K 547,343
2025-10-16 Cloonan Michael President & CEO Option exercise · Non-Qualified Stock Option (right to buy) 10b5-1 −10,225 153,142
2025-10-16 Cloonan Michael President & CEO Option exercise · Non-Qualified Stock Option (right to buy) 10b5-1 −200 152,942
2025-10-15 Cloonan Michael President & CEO Option exercise 10b5-1 +14,775 $6.11 $90K 562,118
2025-10-15 Cloonan Michael President & CEO Sale 10b5-1 −14,775 $31.11 $460K 547,343
2025-10-15 Cloonan Michael President & CEO Option exercise · Non-Qualified Stock Option (right to buy) 10b5-1 −14,775 163,367
2025-10-15 Booth Bruce Director Sale 10b5-1 −65,726 $30.37 $2.0M 2,649,217
2025-10-15 Booth Bruce Director Sale 10b5-1 −13,795 $30.37 $419K 757,967
2025-10-15 Booth Bruce Director Sale 10b5-1 −30,032 $31.12 $935K 2,619,185
2025-10-15 Booth Bruce Director Sale 10b5-1 −6,303 $31.12 $196K 751,664
2025-10-14 Booth Bruce Director Sale 10b5-1 −501 $29.95 $15K 2,714,943

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