SION
Sionna Therapeutics, Inc. Common Stock
stockNASDAQ
At CloseOct 2, 2026 3:59:59 PM EDT
4.93USD-3.048%(-0.16)1,159,021
Pre-marketOct 2, 2026 9:28:30 AM EDT
5.17USD+1.672%(+0.09)
After-hoursOct 2, 2026 4:13:30 PM EDT
4.98USD+1.014%(+0.05)
On 2026-09-14 there were 0 FTDs. The average number of FTDs per day for September 2026 is 22,124.
SION Fails-to-Deliver (FTDs)
Fails-to-Deliver
SION Fails-to-Deliver
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| Trade Date (T)1 | Fails-to- Deliver2 | FTD Change | Trade Vol. | Settlement Date (T+B)4 | Closing Deadline (T+35C)5 | Price3 | $ Notional |
|---|---|---|---|---|---|---|---|
| 2026-09-11 | — | -39,094 | 1.2M | 2026-09-14 | 2026-10-16 | 7.85 | 0 |
| 2026-09-10 | 39,094 | +39,094 | 1.2M | 2026-09-11 | 2026-10-15 | 7.62 | 297,896 |
| 2026-09-09 | — | -18,174 | 767.5K | 2026-09-10 | 2026-10-14 | 7.48 | 0 |
| 2026-09-08 | 18,174 | -43,738 | 884.8K | 2026-09-09 | 2026-10-13 | 7.30 | 132,670 |
| 2026-09-04 | 61,912 | +61,912 | 926.1K | 2026-09-08 | 2026-10-09 | 7.18 | 444,528 |
| 2026-09-03 | — | -6,233 | 1.2M | 2026-09-04 | 2026-10-08 | 6.75 | 0 |
| 2026-09-02 | 6,233 | +2,113 | 1.6M | 2026-09-03 | 2026-10-07 | 7.31 | 45,563 |
| 2026-09-01 | 4,120 | -65,465 | 1.4M | 2026-09-02 | 2026-10-06 | 6.46 | 26,615 |
| 2026-08-31 | 69,585 | +28,694 | 1.4M | 2026-09-01 | 2026-10-05 | 6.03 | 419,598 |
| 2026-08-28 | 40,891 | +40,891 | 784.8K | 2026-08-31 | 2026-10-02 | 5.87 | 240,030 |
| 2026-08-27 | — | 0 | 775.8K | 2026-08-28 | 2026-10-01 | 6.06 | 0 |
| 2026-08-26 | — | -99,175 | 926.3K | 2026-08-27 | 2026-09-30 | 6.17 | 0 |
| 2026-08-25 | 99,175 | +13,993 | 2.0M | 2026-08-26 | 2026-09-29 | 6.25 | 619,844 |
| 2026-08-24 | 85,182 | -5,263 | 1.8M | 2026-08-25 | 2026-09-28 | 5.59 | 476,167 |
| 2026-08-21 | 90,445 | +1,202 | 1.9M | 2026-08-24 | 2026-09-25 | 5.29 | 478,454 |
| 2026-08-20 | 89,243 | +81,064 | 1.7M | 2026-08-21 | 2026-09-24 | 5.52 | 492,621 |
| 2026-08-19 | 8,179 | +7,479 | 1.9M | 2026-08-20 | 2026-09-23 | 6.25 | 51,119 |
| 2026-08-18 | 700 | +700 | 2.1M | 2026-08-19 | 2026-09-22 | 5.94 | 4,158 |
| 2026-08-17 | — | -6,780 | 3.0M | 2026-08-18 | 2026-09-21 | 5.91 | 0 |
| 2026-08-14 | 6,780 | -6,991 | 2.9M | 2026-08-17 | 2026-09-18 | 6.46 | 43,799 |
| 2026-08-13 | 13,771 | +10,363 | 5.5M | 2026-08-14 | 2026-09-17 | 6.54 | 90,062 |
| 2026-08-12 | 3,408 | +2,910 | 9.4M | 2026-08-13 | 2026-09-16 | 6.25 | 21,300 |
| 2026-08-11 | 498 | -1,817 | 14.9M | 2026-08-12 | 2026-09-15 | 5.10 | 2,540 |
| 2026-08-10 | 2,315 | +2,315 | 38.6M | 2026-08-11 | 2026-09-14 | 4.50 | 10,418 |
| 2026-08-07 | — | 0 | 747.5K | 2026-08-10 | 2026-09-11 | 51.04 | 0 |
Historical data is split-adjusted.
1 Trade Date is calculated from the Settlement Date.
2 Fails to deliver on a given day are a CUMULATIVE number of all fails outstanding until that day, plus new fails that occur that day, less fails that settle that day. A dash (—) indicates no FTDs were reported that day. It’s been shown that the SEC withholds the FTD report for two weeks, and there are often high-volume days with no reported FTDs, so it’s unclear if missing days truly indicate 0 FTDs.
3 Closing price on the Trade Date. The FTD file contains the closing price on the day previous to settlement.
4 As of May 28, 2024, the standard for settlement is next business day after a trade (T+1B). Before that, it was trade date plus two business days (T+2B).
5 RegSHO IV. 3. A broker-dealer has up to 35 calendar days following the trade date to close out the failure to deliver position by purchasing securities of like kind and quantity. Analysis of the T+35 cycle.