SIONNA THERAPEUTICS INC (SION) — large price moves

Health Care · NASDAQ

Single sessions where SION closed 10% or more away from the previous close, between 2025-10-08 and 2026-10-08. Each one lists the events filed in the 5 days ending at that session, in date order.

Of the 18 moves listed, 9 have at least one filed event in the 5 days ending at the session, and 9 have none. Across the catalog most large moves have nothing filed near them, so an empty list is an ordinary result and not a gap.

Moves

• 2026-09-18 -17.0% $7.18 to $5.96 filed events in the 5 days to 2026-09-18
  • 2026-09-14 Analyst consensus Consensus price target moved upconsensus target $15.17 to $20.86 · between snapshots 2026-08-24 and 2026-09-14 · 7 analystsSource: Analyst consensus snapshots
  • 2026-09-17 Insider trade Open-market sale reported by an insider2 transactions · 1 insider · $21,835,018Source: SEC Form 4
• 2026-09-15 -16.7% $8.26 to $6.88 filed events in the 5 days to 2026-09-15
  • 2026-09-14 Analyst consensus Consensus price target moved upconsensus target $17.20 to $20.86 · between snapshots 2026-08-16 and 2026-09-14 · 7 analystsSource: Analyst consensus snapshots
• 2026-09-02 +13.2% $6.46 to $7.31 filed events in the 5 days to 2026-09-02
  • 2026-08-31 Analyst consensus Consensus price target moved downconsensus target $53.20 to $15.17 · between snapshots 2026-08-08 and 2026-08-31 · 6 analystsSource: Analyst consensus snapshots
• 2026-08-25 +11.8% $5.59 to $6.25 filed events in the 5 days to 2026-08-25
  • 2026-08-24 Analyst consensus Consensus price target moved downconsensus target $51.60 to $15.17 · between snapshots 2026-07-31 and 2026-08-24 · 6 analystsSource: Analyst consensus snapshots
• 2026-08-20 -11.7% $6.25 to $5.52 filed events in the 5 days to 2026-08-20
  • 2026-08-16 Analyst consensus Consensus price target moved downconsensus target $51.60 to $17.20 · between snapshots 2026-07-31 and 2026-08-16 · 5 analystsSource: Analyst consensus snapshots
• 2026-08-12 +38.9% $4.50 to $6.25 filed events in the 5 days to 2026-08-12
  • 2026-08-08 Analyst consensus Consensus price target moved upconsensus target $51.60 to $53.20 · between snapshots 2026-07-31 and 2026-08-08 · 10 analystsSource: Analyst consensus snapshots
• 2026-08-10 -91.2% $51.04 to $4.50 filed events in the 5 days to 2026-08-10
  • 2026-08-06 Earnings Quarterly results reportedquarter ended 2026-06-30 · reported EPS USD -0.66 against an estimate of USD -0.65 · surprise -2.0%Source: SEC filing calendar + Yahoo earnings history
  • 2026-08-06 Periodic filing 10-Q filedaccession 0001628280-26-053839Source: SEC EDGAR
  • 2026-08-06 Material event 8-K filed (material event)accession 0001628280-26-053832Source: SEC EDGAR
  • 2026-08-08 Analyst consensus Consensus price target moved upconsensus target $51.60 to $53.20 · between snapshots 2026-07-31 and 2026-08-08 · 10 analystsSource: Analyst consensus snapshots
• 2026-06-09 -18.1% $41.13 to $33.69 filed events in the 5 days to 2026-06-09

  No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.

• 2026-05-12 -10.9% $45.95 to $40.94 filed events in the 5 days to 2026-05-12
  • 2026-05-07 Insider trade Open-market sale reported by an insider2 transactions · 2 insiders · $4,331,274Source: SEC Form 4
  • 2026-05-08 Insider trade Open-market sale reported by an insider2 transactions · 2 insiders · $5,328,826Source: SEC Form 4
  • 2026-05-11 Insider trade Open-market sale reported by an insider2 transactions · 2 insiders · $17,068,029Source: SEC Form 4
  • 2026-05-12 Earnings Quarterly results reportedquarter ended 2026-03-31 · reported EPS USD -0.60 against an estimate of USD -0.50 · surprise -19.1%Source: SEC filing calendar + Yahoo earnings history
  • 2026-05-12 Periodic filing 10-Q filedaccession 0001628280-26-033876Source: SEC EDGAR
  • 2026-05-12 Material event 8-K filed (material event)accession 0001628280-26-033870Source: SEC EDGAR
  • 2026-05-12 Filing language risk_factors changed in the 10-Qsection risk_factors · accession 0001628280-26-033876Source: SEC EDGAR (section comparison against the prior filing)
  • 2026-05-12 Filing language mdna changed in the 10-Qsection mdna · accession 0001628280-26-033876Source: SEC EDGAR (section comparison against the prior filing)
• 2026-04-23 -11.2% $43.20 to $38.35 filed events in the 5 days to 2026-04-23
  • 2026-04-18 Insider trade Open-market sale reported by an insider2 transactions · 2 insiders · $262,490Source: SEC Form 4
• 2026-04-13 +10.2% $37.89 to $41.77 filed events in the 5 days to 2026-04-13

  No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.

• 2026-02-05 -14.7% $41.32 to $35.25 filed events in the 5 days to 2026-02-05

  No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.

• 2026-01-14 +11.9% $36.81 to $41.18 filed events in the 5 days to 2026-01-14

  No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.

• 2026-01-08 -15.3% $43.21 to $36.60 filed events in the 5 days to 2026-01-08

  No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.

• 2026-01-07 +16.1% $37.22 to $43.21 filed events in the 5 days to 2026-01-07

  No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.

• 2025-12-01 -10.6% $43.57 to $38.96 filed events in the 5 days to 2025-12-01

  No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.

• 2025-11-21 +12.1% $38.94 to $43.66 filed events in the 5 days to 2025-11-21

  No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.

• 2025-10-21 +32.0% $32.20 to $42.50 filed events in the 5 days to 2025-10-21

  No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.

These are events filed near a session, listed by date. They are not ranked, and no connection between an event and a price move is stated or implied.

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Informational only — NOT financial advice. Price moves are computed from stored daily closes; filed events come from their own sources with their own dates.