UPB · Upstream Bio, Inc.
$6.85
-0.67 (-8.85%)
At close · Aug 20
Going-concern doubt
— flagged Aug 11, 2026
Substantial doubt about the company's ability to continue as a going concern.
“The Company has evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about the Company's ability to continue as a going concern within one year from the issuance of these condensed consolidated financial statements.”View the 10-Q filed Aug 11, 2026
Market Cap
$375.18M
Shares
54.77M
Shares sold short and not yet covered, reported twice monthly. Days to cover is the reported short position divided by average daily volume.
Model estimate
Expected Aug 14 short interest
as of Aug 14
3,425,664
-6.1% vs reported
Short Squeeze Score
71/100
Short interest 6.7% of shares — P81
Days to cover 7.5 — P82
Price vs VWAP -2.1% — P42
Short-volume trend +8.6% — P80
Short interest change +0.8% — P60
Worst FTD 0.01% of shares — P59
Peer-relative percentile rank across all stocks reporting short interest at the latest settlement date (2026-07-31). Weighted mean of the available factors (short interest 30%, days to cover 20%, price vs VWAP 15%, short-volume trend 15%, short-interest change 10%, fails-to-deliver 10%) plus catalyst boosts (price spike, volume surge, earnings within days), capped at +20 and clamped to 100.
Short Interest History
| Settlement Date | Current Position | Previous Position | Change | Days to Cover |
|---|---|---|---|---|
|
2026-08-31
Scheduled
FINRA publishes Sep 10
|
— | — | — | — |
|
2026-08-14
Scheduled
FINRA publishes Aug 25
|
— | — | — | — |
| 2026-07-31 | 3,648,558 | 3,618,151 | +30,407 | 7.49 |
| 2026-07-15 | 3,618,151 | 4,105,630 | -487,479 | 8.18 |
| 2026-06-30 | 4,105,630 | 3,898,229 | +207,401 | 5.72 |
| 2026-06-15 | 3,898,229 | 3,640,867 | +257,362 | 5.48 |
| 2026-05-29 | 3,640,867 | 3,397,759 | +243,108 | 6.81 |
| 2026-05-15 | 3,397,759 | 3,223,622 | +174,137 | 6.69 |
| 2026-04-30 | 3,223,622 | 3,022,894 | +200,728 | 5.71 |
| 2026-04-15 | 3,022,894 | 3,435,261 | -412,367 | 5.24 |
| 2026-03-31 | 3,435,261 | 4,752,354 | -1,317,093 | 3.46 |
| 2026-03-13 | 4,752,354 | 4,086,377 | +665,977 | 4.44 |
| 2026-02-27 | 4,086,377 | 3,529,797 | +556,580 | 1.83 |
| 2026-02-13 | 3,529,797 | 3,183,884 | +345,913 | 1.52 |
| 2026-01-30 | 3,183,884 | 3,451,544 | -267,660 | 5.54 |
| 2026-01-15 | 3,451,544 | 3,486,600 | -35,056 | 5.29 |
| 2025-12-31 | 3,486,600 | 2,983,568 | +503,032 | 5.75 |
| 2025-12-15 | 2,983,568 | 2,773,635 | +209,933 | 5.58 |
| 2025-11-28 | 2,773,635 | 2,994,056 | -220,421 | 5.12 |
| 2025-11-14 | 2,994,056 | 2,929,476 | +64,580 | 7.81 |
| 2025-10-31 | 2,929,476 | 3,336,913 | -407,437 | 7.88 |
| 2025-10-15 | 3,336,913 | 3,564,217 | -227,304 | 10.27 |
| 2025-09-30 | 3,564,217 | 3,011,653 | +552,564 | 6.44 |
| 2025-09-15 | 3,011,653 | 3,097,969 | -86,316 | 4.54 |
| 2025-08-29 | 3,097,969 | 3,160,080 | -62,111 | 8.78 |
Showing 1–23 of 23 settlements
Key facts
CIK
2022626
CUSIP
91678A107
13F (30d)
146 filings
144 filers
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