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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
2025-02-10 Atlas Venture Fund XI, L.P. 10% owner Conversion +747,727 747,727
2025-02-10 Atlas Venture Fund XI, L.P. 10% owner Purchase +60,000 $18.00 $1.1M 807,727
2025-02-10 Atlas Venture Fund XI, L.P. 10% owner Conversion · Series Seed convertible preferred stock −1,051,051 0
2025-02-10 Atlas Venture Fund XI, L.P. 10% owner Conversion · Series A convertible preferred stock −1,806,317 0
2025-02-10 Atlas Venture Fund XI, L.P. 10% owner Conversion · Series B convertible preferred stock −1,298,332 0
2025-02-10 Atlas Venture Fund XI, L.P. 10% owner Conversion · Series C convertible preferred stock −61,463 0
2025-02-10 Atlas Venture Fund XI, L.P. 10% owner Conversion · Series C convertible preferred stock −1,092,504 0
2025-02-10 Booth Bruce Director Conversion +2,886,293 2,886,293
2025-02-10 Booth Bruce Director Conversion +747,727 747,727
2025-02-10 Booth Bruce Director Purchase +60,000 $18.00 $1.1M 807,727
2025-02-10 Booth Bruce Director Conversion · Series Seed convertible preferred stock −1,051,051 0
2025-02-10 Booth Bruce Director Conversion · Series A convertible preferred stock −1,806,317 0
2025-02-10 Booth Bruce Director Conversion · Series B convertible preferred stock −1,298,332 0
2025-02-10 Booth Bruce Director Conversion · Series C convertible preferred stock −61,463 0
2025-02-10 Booth Bruce Director Conversion · Series C convertible preferred stock −1,092,504 0
2025-02-10 ORBIMED ADVISORS LLC Director Conversion +3,154,959 3,154,959
2025-02-10 ORBIMED ADVISORS LLC Director Purchase +550,000 $18.00 $9.9M 3,704,959
2025-02-10 ORBIMED ADVISORS LLC Director Conversion · Series B convertible preferred stock −2,560,951 0
2025-02-10 ORBIMED ADVISORS LLC Director Conversion · Series C convertible preferred stock −2,048,760 0
2025-02-06 Ruddy Marcella K. Director Grant or award · Stock Option (Right to Buy) +39,919 39,919

Page 14 of 15 · 284 trades