RLYB
Rallybio Corp · Healthcare · Market cap $86.1M
Insider Buying
$4.2M
reported purchases (SEC code P)
Insider Selling
$4K
reported sales (SEC code S)
Unique Insiders
2
in the rolling window
Latest filing
Oct 20, 2026
ADAR1 Capital Management, LLC
Rallybio Corp (RLYB) has 14 SEC Form 4 filings (28 transaction rows) in the rolling window, disclosed by 2 distinct insiders. Most recent filing: Oct 20, 2026.
Inside the rolling window, 2 insiders at Rallybio Corp reported 8 open-market purchases totaling $4.2M and 1 open-market sale totaling $4K. The most active filer is 10% Owner ADAR1 Capital Management, LLC with 8 filings. Insiders have net bought $4.2M over the trailing 6 months. The largest single insider purchase in this window was $1.7M by 10% Owner ADAR1 Capital Management, LLC on May 4, 2026. The most recent open-market filing is a purchase of 6,009 shares by 10% Owner ADAR1 Capital Management, LLC, dated May 18, 2026, worth $84K.
- Industry:Biotechnology
- CEO:Stephen Uden
- Employees:7
- HQ:New Haven, CT, US
- IPO:2021-07-29
| Source | |||||||
|---|---|---|---|---|---|---|---|
| 10% Owner | Purchase | 6,009 | $84K | May 21 | +5.5% | SEC ↗ | |
| 10% Owner | Purchase | 10,200 | $143K | May 21 | +5.5% | SEC ↗ | |
| 10% Owner | Purchase | 79,259 | $1.1M | May 16 | +15.0% | SEC ↗ | |
| 10% Owner | Purchase | 300 | $4K | May 16 | +15.0% | SEC ↗ | |
| 10% Owner | Purchase | 50,000 | $700K | May 14 | +14.1% | SEC ↗ | |
| 10% Owner | Purchase | 800 | $11K | May 14 | — | SEC ↗ | |
ADAR1 Capital Management, LLCFirst filing | 10% Owner | Purchase | 120,804 | $1.7M | May 7 | — | SEC ↗ |
ADAR1 Capital Management, LLCFirst filing | 10% Owner | Purchase | 35,101 | $491K | May 7 | — | SEC ↗ |
Lieber Jonathan IFirst filing | Chief Financial Officer | Sale | 789 | $4K | Feb 23 | — | SEC ↗ |
Earnings: last 7 quarters
Frequently asked questions
How many SEC Form 4 insider filings does RLYB have?
Rallybio Corp (RLYB) has 14 SEC Form 4 filings (28 transaction rows) in the rolling 365-day window, disclosed by 2 distinct insiders. Most recent filing: Oct 20, 2026.
When was the most recent SEC Form 4 filing for RLYB?
The most recent Form 4 filing for RLYB on Tracefour is dated Oct 20, 2026.
Who is the most active insider at RLYB?
The most active SEC Form 4 filer at RLYB in the rolling window is 10% Owner ADAR1 Capital Management, LLC, with 8 filings.
What is the net insider flow at RLYB over the last 6 months?
Over the trailing 180 days, insiders at RLYB have net bought $4.2M based on SEC Form 4 disclosures.
What was the largest insider purchase at RLYB?
The largest single insider open-market purchase at RLYB in the rolling window was $1.7M by 10% Owner ADAR1 Capital Management, LLC on 2026-05-04.
What is the total insider buy and sell value at RLYB in the current window?
Inside the rolling window, insiders at RLYB bought $4.2M and sold $4K based on SEC Form 4 filings.
Can I get alerts for RLYB insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at Rallybio Corp (RLYB). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
Rallybio Corp is in the Healthcare sector.