Sionna Therapeutics, Inc.
Sionna Therapeutics, Inc. (SION) Insider Trading
Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.
SEC EDGAR · FMP · SION · as of Jun 8, 2026
Activity summary
Buy transactions
0
P-Purchase only
Sell transactions
153
12 Months
Buy/Sell ratio
0.00
Buy/Sell (by trades)
Overall sentiment
Sionna Therapeutics, Inc. insiders have been primarily selling shares over the past 12 Months. Selling activity is often driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment toward the company.
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only
As of Jun 8, 2026
SION insider buying and selling by quarter
SION insider selling · SION insider buying stocks · quarterly insider activity
Mobile shows last 4Q · Desktop shows full 8Q
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters
As of Jun 8, 2026
Active insiders
Most active in past 12 months · SION ceo insider trading
Showing all insiders · Click a card to filter the transactions table below
▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API
Recent insider transactions
SION executive sell shares · SION board member insider trading · SION insider trading SEC filing
Scroll horizontally to see all columns
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| May 27, 2026 | Thompson Peter A. Director | Sale | 101 | $4K | Form 4 |
| May 27, 2026 | ORBIMED ADVISORS LLC Director | Sale | 101 | $4K | Form 4 |
| May 7, 2026 | Thompson Peter A. Director | Sale | 48,546 | $2.17M⚡ | Form 4 |
| May 8, 2026 | Thompson Peter A. Director | Sale | 59,767 | $2.66M⚡ | Form 4 |
| May 11, 2026 | Thompson Peter A. Director | Sale | 184,639 | $8.53M⚡ | Form 4 |
| May 7, 2026 | ORBIMED ADVISORS LLC Director | Sale | 48,546 | $2.17M⚡ | Form 4 |
| May 8, 2026 | ORBIMED ADVISORS LLC Director | Sale | 59,767 | $2.66M⚡ | Form 4 |
| May 11, 2026 | ORBIMED ADVISORS LLC Director | Sale | 184,639 | $8.53M⚡ | Form 4 |
| Apr 17, 2026 | Thompson Peter A. Director | Sale | 52,397 | $2.34M⚡ | Form 4 |
| Apr 18, 2026 | Thompson Peter A. Director | Sale | 2,948 | $131K | Form 4 |
| Apr 17, 2026 | ORBIMED ADVISORS LLC Director | Sale | 52,397 | $2.34M⚡ | Form 4 |
| Apr 18, 2026 | ORBIMED ADVISORS LLC Director | Sale | 2,948 | $131K | Form 4 |
| Apr 14, 2026 | Thompson Peter A. Director | Sale | 47,814 | $2.13M⚡ | Form 4 |
| Apr 15, 2026 | Thompson Peter A. Director | Sale | 235,863 | $10.53M⚡ | Form 4 |
| Apr 16, 2026 | Thompson Peter A. Director | Sale | 226,906 | $10.29M⚡ | Form 4 |
| Apr 14, 2026 | ORBIMED ADVISORS LLC Director | Sale | 47,814 | $2.13M⚡ | Form 4 |
| Apr 15, 2026 | ORBIMED ADVISORS LLC Director | Sale | 235,863 | $10.53M⚡ | Form 4 |
| Apr 16, 2026 | ORBIMED ADVISORS LLC Director | Sale | 226,906 | $10.29M⚡ | Form 4 |
| Mar 5, 2026 | Fitzpatrick Jennifer Chief Legal Officer | Option | 10,250 | $63K | Form 4 |
| Mar 5, 2026 | Fitzpatrick Jennifer Chief Legal Officer | Sale | 10,250 | $347K | Form 4 |
| Feb 2, 2026 | Thompson Peter A. Director | Sale | 1,890 | $84K | Form 4 |
| Feb 3, 2026 | Thompson Peter A. Director | Sale | 29,063 | $1.30M⚡ | Form 4 |
| Feb 2, 2026 | ORBIMED ADVISORS LLC Director | Sale | 1,890 | $84K | Form 4 |
| Feb 3, 2026 | ORBIMED ADVISORS LLC Director | Sale | 29,063 | $1.30M⚡ | Form 4 |
| Jan 22, 2026 | TPG GP A, LLC 10 percent owner | Sale | 250,000 | $10.00M⚡ | Form 4 |
ORBIMED ADVISORS LLC
Director
Date
May 11
Shares
184,639
Price
$46.22
Value
$8.53M ⚡
ORBIMED ADVISORS LLC
Director
Date
Apr 17
Shares
52,397
Price
$44.68
Value
$2.34M ⚡
ORBIMED ADVISORS LLC
Director
Date
Apr 14
Shares
47,814
Price
$44.51
Value
$2.13M ⚡
ORBIMED ADVISORS LLC
Director
Date
Apr 15
Shares
235,863
Price
$44.64
Value
$10.53M ⚡
ORBIMED ADVISORS LLC
Director
Date
Apr 16
Shares
226,906
Price
$45.34
Value
$10.29M ⚡
Fitzpatrick Jennifer
Chief Legal Officer
Date
Mar 5
Shares
10,250
Price
$6.11
Value
$63K
Fitzpatrick Jennifer
Chief Legal Officer
Date
Mar 5
Shares
10,250
Price
$33.86
Value
$347K
TPG GP A, LLC
10 percent owner
Date
Jan 22
Shares
250,000
Price
$40.00
Value
$10.00M ⚡
⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar
▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —
About SION insider trading
SION insider trades
Sionna Therapeutics, Inc. (SION) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including RA CAPITAL MANAGEMENT, L.P. (Director), Thompson Peter A. (Director), ORBIMED ADVISORS LLC (Director). Over the past 12 months, 5 insiders have filed transactions with the SEC. SION insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.
For Sionna Therapeutics, Inc.'s institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →
Frequently asked questions
SION insider trading · 5 questionsThe insiders of Sionna Therapeutics, Inc. (SION) include executives and directors such as RA CAPITAL MANAGEMENT, L.P. (Director), Thompson Peter A. (Director), ORBIMED ADVISORS LLC (Director), among others. Over the past 12 months, 5 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.
▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 8, 2026