Sionna Therapeutics, Inc. (SION)
NASDAQHealth CareBiotechnologySnapshot 2026-09-04
$7.18+6.37%
Close 2026-09-04 · 1-day change
NASDAQHealth CareBiotechnologySnapshot 2026-09-04
QuarterlyIQ Insights · SION
What must go right, what could break, what the price assumes, and what evidence comes next.
The current health of the standing investment case.
Recent financial performance sits well below its industry cohort — worth keeping an eye on, though it has not freshly broken.
One-year growth currently built into the price, compared with our model's estimate.
| Measure | Marker shape | Value |
|---|---|---|
| Growth built into the price | circle | -76.8% |
| Our one-year growth estimate | diamond | Not available |
Growth built into the price is above our model estimate.
For each item: what to watch, what would become a concern, and what would make it less concerning.
A reporting-risk estimate, not a forecast of the stock-price response.
Historical relationships that met the evidence threshold. They do not prove cause or forecast a move.
No outside relationship met the current evidence threshold.
Based on historical daily prices through 2026-09-04.
Past price behavior in dollars on a $10,000 position. This does not measure permanent business risk.
How much price usually moves either way.
A larger daily loss that occurred about once in every 20 trading days.
Use the underlying financial and sector pages to investigate the cause.
Not investment advice. Scores describe historical and current data; they are not forecasts of future returns. Consult a licensed advisor before making investment decisions.
A comparable growth gap is not available.
The one-year revenue growth assumption on Valuation.
Worth watching into the next print: this name operates in a high-miss-rate industry and is on a run of consecutive earnings misses. A fundamental tilt, not a price call.
Model as of 2026-09-04 · Compared with 398 industry peers · Company calendar date is not available
SION — earnings miss
Dated 2026-08-06
and in Exhibit 99.1 attached hereto is intended to be furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, except as expressly set forth by specific reference in such filing.
Why it matters: The upcoming earnings report will show if the company can recover from its recent loss.
Worry ifEarnings report shows a smaller loss than the previous quarter's miss.
Less concerning ifEarnings report shows a larger loss than the previous quarter's miss.
Why it matters: Updates on losses will show how Sionna is managing cash. This is while developing its pipeline.
Worry ifOperating losses are lower than in earlier quarters.
Less concerning ifOperating losses are higher than in earlier quarters.
Why it matters: Updates on cash will show if Sionna can continue operations and fund trials. This is critical for its future.
Worry ifSionna reports an increase in cash reserves or a plan to extend its cash runway.
Less concerning ifSionna announces a significant cash burn or plans to cut programs due to cash constraints.
Why it matters: If the health care sector shows renewed growth, it may help Sionna's performance.
Supportive ifHealth care sector revenue growth accelerates back toward its previous highs.
Worry ifHealth care sector revenue growth continues to decelerate.
We watch for confirming and disproving signals on each item. Resolutions are found automatically where possible and checked by hand for unclear cases. Last 90 days shown.
Deepest peak-to-trough drop in the last year.
| Measure | Value | Meaning |
|---|---|---|
| Typical day | ±$353 on $10,000 · ±3.5% | How much price usually moves either way. |
| Bad day | $798 loss on $10,000 · 8.0% | A larger daily loss that occurred about once in every 20 trading days. |
| Largest peak-to-trough drop in the past year | $9,118 loss on $10,000 · 91.2% | Deepest peak-to-trough drop in the last year. |
Past year. 1.00 means similar movement; 1.20 means about 20% more.
Past year. 1.00 means similar movement to the sector. This is secondary context.
Latest 30 trading days, shown as an annual percentage.
Latest 252 trading days, shown as an annual percentage.
20-trading-day average in US dollars.
Trading days used by the source risk snapshot.
Past results, not a forecast. Not investment advice.
Why it matters: Updates will indicate if SION-451 can succeed where SION-719 failed. This impacts Sionna's pipeline.
Supportive ifSionna has good safety and effectiveness results from the SION-451 trial.
Worry ifSionna reports safety issues or weak results from the SION-451 trial.
Why it matters: Updates on cash will show how Sionna plans to handle its money after trial results. This matters for stability.
Worry ifManagement says the cash position is stable. It is enough to fund operations until 2028.
Less concerning ifManagement says there is a cash shortfall or need for more funding due to higher costs.
Why it matters: Steps to save cash could affect future projects and daily operations.
Worry ifManagement shares plans to save cash and extend their runway.
Less concerning ifManagement reports ongoing spending without new plans to save cash.
Why it matters: Updates on cash will show if Sionna can fund operations through 2028 as planned.
Watch forCash position remains above $250 million after Q2 earnings.
Also watch forCash position drops below $250 million after Q2 earnings.
Why it matters: A drop in revenue growth could signal a slowdown in the healthcare sector, impacting Sionna's prospects.
Worry ifSector revenue growth drops below its median for the first time in years.
Less concerning ifSector revenue growth remains above its median.
Why it matters: Knowing confounders could help future trials and product plans.
Watch forManagement finds and fixes issues that affect the SION-719 trial results.
Also watch forManagement does not find key issues. This makes the next steps unclear.
Why it matters: Updates on cash runway will indicate if Sionna can sustain operations and fund trials through 2028.
Worry ifManagement says cash runway goes beyond 2028.
Less concerning ifManagement says cash runway is shorter than expected.