Rallybio Corporation (RLYB) — Short Interest History
The most recent FINRA short interest report for RLYB (settlement date April 30, 2026) shows 1,572,902 shares sold short , a change of 11.88% from the prior report .
Days to cover: 28.85.
Short interest history for RLYB
| Settlement date | Short interest | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| Apr 30, 2026 | 1,572,902 | 11.88% | 54,522 | 28.85 |
| Apr 15, 2026 | 1,405,893 | 26.79% | 68,044 | 20.66 |
| Mar 31, 2026 | 1,108,870 | 38.97% | 108,393 | 10.23 |
| Mar 13, 2026 | 797,895 | 1,692.34% | 499,683 | 1.60 |
| Feb 27, 2026 | 44,517 | 14.22% | 89,587 | 1.00 |
| Feb 13, 2026 | 38,974 | -72.48% | 24,991 | 1.56 |
| Jan 30, 2026 | 141,643 | 21.47% | 169,162 | 1.00 |
| Jan 15, 2026 | 116,605 | 9.79% | 118,793 | 1.00 |
| Dec 31, 2025 | 106,204 | -13.36% | 223,073 | 1.00 |
| Dec 15, 2025 | 122,587 | -12.68% | 153,372 | 1.00 |
| Nov 28, 2025 | 140,389 | -19.58% | 201,521 | 1.00 |
| Nov 14, 2025 | 174,572 | -24.05% | 210,573 | 1.00 |
| Oct 31, 2025 | 229,838 | -19.15% | 286,823 | 1.00 |
| Oct 15, 2025 | 284,270 | -14.25% | 329,252 | 1.00 |
| Sep 30, 2025 | 331,509 | -21.48% | 320,243 | 1.04 |
| Sep 15, 2025 | 422,184 | -31.06% | 367,311 | 1.15 |
| Aug 29, 2025 | 612,420 | -20.66% | 307,832 | 1.99 |
| Aug 15, 2025 | 771,851 | -42.68% | 552,788 | 1.40 |
| Jul 31, 2025 | 1,346,454 | -31.83% | 557,460 | 2.42 |
| Jul 15, 2025 | 1,975,093 | 470.24% | 16,128,056 | 1.00 |
| Jun 30, 2025 | 346,362 | 4.95% | 184,117 | 1.88 |
| Jun 13, 2025 | 330,040 | 3.50% | 462,974 | 1.00 |
| May 30, 2025 | 318,870 | -10.67% | 92,129 | 3.46 |
| May 15, 2025 | 356,942 | -1.78% | 72,227 | 4.94 |
| Apr 30, 2025 | 363,424 | 3.36% | 89,099 | 4.08 |
Frequently asked questions
- What is short interest in RLYB?
- Short interest is the total number of RLYB shares currently sold short but not yet covered or closed out. FINRA publishes this data twice monthly.
- How is RLYB short interest calculated?
- Short interest is aggregated from member firm reports to FINRA. Every U.S. broker-dealer must report aggregate short positions in each security as of the 15th and last trading day of each month.
- What does a high short interest mean?
- Higher short interest can indicate bearish sentiment, but it also raises the potential for a short squeeze if positive news forces short sellers to cover their positions simultaneously. Compare short interest to float (short percent of float) for context.