Insider Transactions Reported by 18 Insiders of Sionna Therapeutics, Inc.

Symbol
SION on Nasdaq
Location
Waltham, MA

Insiders trading volume in the past year

Sionna Therapeutics, Inc. executives and other stock owners filed with the SEC include:

Name Relationship Holdings Value Past Year Net Change Change % Report Date
TPG GP A, LLC 10%+ Owner $259,798,480 -$9,049,600 -3.4% 22 Jan 2026
Peter A. Thompson Director $157,398,695 -$7,763,508 -4.7% 02 Feb 2026
ORBIMED ADVISORS LLC Director $157,398,695 -$7,763,508 -4.7% 02 Feb 2026
Bruce Booth Director $109,099,824 -$22,085,832 -17% 21 Oct 2025
Michael Cloonan President & CEO, Director $20,421,367 -$6,327,622 -24% 02 Jan 2026
RA CAPITAL MANAGEMENT, L.P. Director, 10%+ Owner $6,281,803 -$21,463,466 -77% 20 Nov 2025
Elena Ridloff Cfo $966,382 -$1,966,634 -67% 02 Jan 2026
Jennifer Fitzpatrick Chief Legal Officer $0 -$999,329 -100% 05 Mar 2026
Paul J. Clancy Director 12 Jun 2025
Harold Edward Fleming Director 12 Jun 2025
Joshua Resnick Director 12 Jun 2025
Charlotte McKee Chief Medical Officer 02 Jan 2026
Atlas Venture Fund XI, L.P. 10%+ Owner 10 Feb 2025
Joanne L. Viney Director 12 Jun 2025
Marcella K. Ruddy Director 12 Jun 2025
Laurie Stelzer Director 12 Jun 2025
Lucian Iancovici Director 06 Feb 2025
Caroline Stark Beer Chief Business Officer 02 Jan 2026

Recent Insider Transactions by Companies or Individuals for Sionna Therapeutics, Inc.

Insider Symbol Class Transaction % Value $ * Price $ Shares Shares Owned Date Ownership
Jennifer Fitzpatrick SION Common Stock Sale -100% $347,019 $33.86 -10,250 0 05 Mar 2026 Direct
Jennifer Fitzpatrick SION Common Stock Options Exercise 10,250 10,250 05 Mar 2026 Direct
Jennifer Fitzpatrick SION Non-Qualified Stock Option (right to buy) Options Exercise -16.8% -10,250 50,935 05 Mar 2026 Direct
Peter A. Thompson SION Common Stock Sale -0.82% $1,295,629 $44.58 -29,063 3,530,702 03 Feb 2026 See footnotes
Orbimed Advisors Llc SION Common Stock Sale -0.82% $1,295,629 $44.58 -29,063 3,530,702 03 Feb 2026 See footnotes
Peter A. Thompson SION Common Stock Sale -0.05% $84,237 $44.57 -1,890 3,559,765 02 Feb 2026 See footnotes
Orbimed Advisors Llc SION Common Stock Sale -0.05% $84,237 $44.57 -1,890 3,559,765 02 Feb 2026 See footnotes
Tpg Gp A, Llc SION Common Stock Sale -3.71% $10,000,000 $40.00 -250,000 6,494,962 22 Jan 2026 See Explanation of Responses
Charlotte McKee SION Non-Qualified Stock Option (right to buy) Award 155,700 155,700 02 Jan 2026 Direct
Jennifer Fitzpatrick SION Non-Qualified Stock Option (right to buy) Award 103,140 103,140 02 Jan 2026 Direct
Michael Cloonan SION Non-Qualified Stock Option (right to buy) Award 436,100 436,100 02 Jan 2026 Direct
Caroline Stark Beer SION Non-Qualified Stock Option (right to buy) Award 139,340 139,340 02 Jan 2026 Direct
Elena Ridloff SION Non-Qualified Stock Option (right to buy) Award 165,440 165,440 02 Jan 2026 Direct
Orbimed Advisors Llc SION Common Stock Sale -0.93% $1,486,010 $44.55 -33,356 3,561,655 24 Dec 2025 See footnotes
Peter A. Thompson SION Common Stock Sale -0.93% $1,486,010 $44.55 -33,356 3,561,655 24 Dec 2025 See footnotes
Orbimed Advisors Llc SION Common Stock Sale -0.02% $38,929 $44.49 -875 3,595,011 19 Dec 2025 See footnotes
Peter A. Thompson SION Common Stock Sale -0.02% $38,929 $44.49 -875 3,595,011 19 Dec 2025 See footnotes
Orbimed Advisors Llc SION Common Stock Sale $4,449 $44.49 -100 3,595,886 18 Dec 2025 See footnotes
Peter A. Thompson SION Common Stock Sale $4,449 $44.49 -100 3,595,886 18 Dec 2025 See footnotes
Orbimed Advisors Llc SION Common Stock Sale -0.03% $40,050 $44.50 -900 3,595,986 17 Dec 2025 See footnotes
Peter A. Thompson SION Common Stock Sale -0.03% $40,050 $44.50 -900 3,595,986 17 Dec 2025 See footnotes
Jennifer Fitzpatrick SION Common Stock Sale -100% $415,330 $40.52 -10,250 0 05 Dec 2025 Direct
Jennifer Fitzpatrick SION Common Stock Options Exercise 10,250 10,250 05 Dec 2025 Direct
Jennifer Fitzpatrick SION Non-Qualified Stock Option (right to buy) Options Exercise -14.4% -10,250 61,185 05 Dec 2025 Direct
Orbimed Advisors Llc SION Common Stock Sale -0.04% $71,184 $44.49 -1,600 3,596,886 26 Nov 2025 See footnotes
Peter A. Thompson SION Common Stock Sale -0.04% $71,184 $44.49 -1,600 3,596,886 26 Nov 2025 See footnotes
Orbimed Advisors Llc SION Common Stock Sale -0.33% $530,294 $44.60 -11,890 3,598,486 25 Nov 2025 See footnotes
Peter A. Thompson SION Common Stock Sale -0.33% $530,294 $44.60 -11,890 3,598,486 25 Nov 2025 See footnotes
Orbimed Advisors Llc SION Common Stock Sale -2.55% $4,212,727 $44.54 -94,583 3,610,376 24 Nov 2025 See footnotes
Peter A. Thompson SION Common Stock Sale -2.55% $4,212,727 $44.54 -94,583 3,610,376 24 Nov 2025 See footnotes
Ra Capital Management, L.P. SION Common Stock Sale -13.7% $994,728 $39.50 -25,183 159,033 21 Nov 2025 See footnotes
Ra Capital Management, L.P. SION Common Stock Sale -2.99% $205,975 $40.13 -5,133 166,642 20 Nov 2025 See footnotes
Ra Capital Management, L.P. SION Common Stock Sale -22% $1,898,173 $40.01 -47,442 168,193 19 Nov 2025 See footnotes
Ra Capital Management, L.P. SION Common Stock Sale -3.65% $273,904 $39.57 -6,922 182,527 18 Nov 2025 See footnotes
Ra Capital Management, L.P. SION Common Stock Sale -30.8% $3,328,081 $40.59 -81,987 184,619 17 Nov 2025 See footnotes
Ra Capital Management, L.P. SION Common Stock Sale -23% $2,478,104 $39.58 -62,610 209,391 28 Oct 2025 See footnotes
Ra Capital Management, L.P. SION Common Stock Sale -58.6% $12,284,500 $39.50 -311,000 219,867 24 Oct 2025 See footnotes
Michael Cloonan SION Common Stock Sale -15.4% $3,618,560 $36.26 -99,800 547,343 21 Oct 2025 Direct
Michael Cloonan SION Common Stock Options Exercise 20.8% 99,800 580,875 21 Oct 2025 Direct
Michael Cloonan SION Non-Qualified Stock Option (right to buy) Options Exercise -65.2% -99,800 53,142 21 Oct 2025 Direct
Bruce Booth SION Common Stock Sale -2.2% $527,653 $34.22 -15,418 686,567 21 Oct 2025 By Atlas Venture Opportunity Fund II, L.P.
Bruce Booth SION Common Stock Sale -3.08% $2,514,030 $34.22 -73,460 2,309,035 21 Oct 2025 By Atlas Venture Fund XI, L.P.
Bruce Booth SION Common Stock Sale -1.36% $311,667 $32.09 -9,712 701,985 20 Oct 2025 By Atlas Venture Opportunity Fund II, L.P.
Bruce Booth SION Common Stock Sale -1.91% $1,484,944 $32.09 -46,273 2,382,495 20 Oct 2025 By Atlas Venture Fund XI, L.P.
Bruce Booth SION Common Stock Sale -1.47% $343,206 $32.37 -10,604 711,697 17 Oct 2025 By Atlas Venture Opportunity Fund II, L.P.
Bruce Booth SION Common Stock Sale -2.04% $1,635,117 $32.37 -50,520 2,428,768 17 Oct 2025 By Atlas Venture Fund XI, L.P.
Bruce Booth SION Common Stock Sale -3.91% $949,998 $32.35 -29,363 722,301 16 Oct 2025 By Atlas Venture Opportunity Fund II, L.P.
Bruce Booth SION Common Stock Sale -5.34% $4,526,169 $32.35 -139,897 2,479,288 16 Oct 2025 By Atlas Venture Fund XI, L.P.
Michael Cloonan SION Common Stock Sale -1.87% $328,491 $31.51 -10,425 547,343 16 Oct 2025 Direct
Michael Cloonan SION Common Stock Options Exercise 1.91% 10,425 557,568 16 Oct 2025 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.