Sionna (SION) CFO Elena Ridloff Receives RSU Awards

What Happened
Elena Ridloff, Chief Financial Officer and Chief Business Officer of Sionna Therapeutics (SION), reported multiple awards on Sept 17, 2026. She received two restricted stock unit (RSU) grants of 47,269 and 47,268 RSUs (each RSU converts to one share at vesting) and a 165,440-share derivative award recorded the same day. The RSUs were reported at $0.00 per share (compensation awards). The derivative line shows the same 165,440 shares both acquired and disposed to the issuer on the same date; footnotes indicate this relates to an option repricing and related adjustments (exercise price set at $7.18 per share on the repricing date).

Key Details

• Transaction date: September 17, 2026. Transaction codes: A = Award/Grant, D = Disposition to issuer (derivative).
• Shares reported: 47,269 RSUs + 47,268 RSUs + 165,440 derivative = 259,977 total shares referenced. Prices reported as $0.00 for the RSU awards. Exercise price for repriced option: $7.18 (per footnote).
• Vesting/conditions: One RSU grant vests June 17, 2027 (service-based); the other vests upon achievement of a performance milestone (plus service).
• Filing timeliness: Report filed Sept 18, 2026 for transactions on Sept 17, 2026 — appears timely.
• Shares owned after transaction: Not specified in the filing.
• Notable footnotes: board-approved option repricing effective Sept 17, 2026; repricing exempt under Rule 16b-6(d) and Rule 16b-3; repriced option has an 18-month retention period that can end earlier on certain events.

Context
These entries are compensation-related awards (RSUs) and an option/derivative adjustment rather than open‑market purchases or sales. RSUs are contingent rights to receive shares at vesting and do not represent immediate cash purchases or sales by the insider. The derivative/option repricing changes the exercise price and related terms per the company notes; such corporate actions are administrative and do not necessarily reflect the insider’s view to buy or sell stock.