UPB
Upstream Bio, Inc.Company with tickers: UPB
CIK
2022626
CUSIP
91678A107
Shares Outstanding
54,419,986
Website
https://www.upstreambio.com
13F Activity (30d)
13 filings
8 filers
Total shares sold short and not yet covered, reported to FINRA by broker-dealers and published twice a month (bi-monthly). Days to cover divides the short position by average daily volume; a high value (above 5) can signal short-squeeze potential.
Short Squeeze Score
66/100
Short interest 6.7% of shares — P80
Days to cover 6.8 — P83
Short-volume trend -4.2% — P36
Peer-relative percentile rank across all stocks reporting short interest at the latest settlement date (2026-05-29). Equal-weight mean of the available factors.
Short Interest History
| Settlement Date | Current Position | Previous Position | Change | Days to Cover |
|---|---|---|---|---|
| 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 |
| 2025-08-15 | 3,160,080 | 3,080,800 | +79,280 | 6.43 |
| 2025-07-31 | 3,080,800 | 3,781,146 | -700,346 | 5.75 |
| 2025-07-15 | 3,781,146 | 4,109,973 | -328,827 | 14.13 |
| 2025-06-30 | 4,109,973 | 3,610,360 | +499,613 | 5.72 |
Showing 1–23 of 23 settlements