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Sionna Therapeutics, Inc. (SION)

Sionna Therapeutics, Inc. (SION) Insider Trading

Directors, officers and holders of more than 10% of SION report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 284 transactions on file: 0 with code P, 23 with code S and 27 with other codes.

DateInsiderCodeShares
Sep 17, 2026Fitzpatrick JenniferA Award103,140
Sep 17, 2026Cloonan MichaelA Award109,025
Sep 17, 2026RA CAPITAL MANAGEMENT, L.P.S Sale3,415,011
Sep 17, 2026Cloonan MichaelD Disposition436,100
Sep 17, 2026Cloonan MichaelA Award436,100
Sep 17, 2026McKee CharlotteA Award155,700
Sep 17, 2026Ridloff ElenaA Award47,268
Sep 17, 2026Fitzpatrick JenniferD Disposition103,140
Sep 17, 2026McKee CharlotteA Award50,000
Sep 17, 2026Fitzpatrick JenniferA Award28,133
Sep 17, 2026McKee CharlotteA Award50,000
Sep 17, 2026RA CAPITAL MANAGEMENT, L.P.S Sale33,800
Sep 17, 2026Fitzpatrick JenniferA Award28,132
Sep 17, 2026Ridloff ElenaA Award165,440
Sep 17, 2026McKee CharlotteD Disposition155,700
Sep 17, 2026Ridloff ElenaD Disposition165,440
Sep 17, 2026Ridloff ElenaA Award47,269
Sep 17, 2026Cloonan MichaelA Award109,025
Jul 7, 2026Thompson Peter A.S Sale85,918
Jul 7, 2026ORBIMED ADVISORS LLCS Sale85,918
Jul 6, 2026Fitzpatrick JenniferM Exercise10,250
Jul 6, 2026Fitzpatrick JenniferM Exercise10,250
Jul 6, 2026Fitzpatrick JenniferS Sale10,250
Jun 30, 2026ORBIMED ADVISORS LLCS Sale115,844
Jun 30, 2026Thompson Peter A.S Sale115,844
Jun 17, 2026Resnick JoshuaA Award17,340
Jun 17, 2026Booth BruceA Award17,340
Jun 17, 2026Ruddy Marcella K.A Award17,340
Jun 17, 2026RA CAPITAL MANAGEMENT, L.P.A Award17,340
Jun 17, 2026Stelzer LaurieA Award17,340
Jun 17, 2026Thompson Peter A.A Award17,340
Jun 17, 2026Fleming Harold EdwardA Award17,340
Jun 17, 2026Clancy Paul JA Award17,340
Jun 17, 2026Viney Joanne L.A Award17,340
May 27, 2026ORBIMED ADVISORS LLCS Sale101
May 27, 2026Thompson Peter A.S Sale101
May 11, 2026Thompson Peter A.S Sale184,639
May 11, 2026ORBIMED ADVISORS LLCS Sale184,639
May 8, 2026ORBIMED ADVISORS LLCS Sale59,767
May 8, 2026Thompson Peter A.S Sale59,767
May 7, 2026ORBIMED ADVISORS LLCS Sale48,546
May 7, 2026Thompson Peter A.S Sale48,546
Apr 18, 2026ORBIMED ADVISORS LLCS Sale2,948
Apr 18, 2026Thompson Peter A.S Sale2,948
Apr 17, 2026Thompson Peter A.S Sale52,397
Apr 17, 2026ORBIMED ADVISORS LLCS Sale52,397
Apr 16, 2026ORBIMED ADVISORS LLCS Sale226,906
Apr 16, 2026Thompson Peter A.S Sale226,906
Apr 15, 2026Thompson Peter A.S Sale235,863
Apr 15, 2026ORBIMED ADVISORS LLCS Sale235,863

The full Form 4 history is on the SION company page (Insider Trades card, View all).

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.