Rallybio Corp (RLYB)
$16.99+$0.05 (+0.30%) Today
Rallybio Corp is a clinical-stage biotechnology company comprised of experienced biopharma industry leaders with extensive research, development, and rare disease expertise with a mission to develop and commercialize life-transforming therapies for patients with severe and rare diseases. The company's program, RLYB116, is a differentiated complement component 5 (C5) inhibitor with the potential to treat diseases of complement dysregulation. The Company manages its operations as a single segment for the purposes of allocating resources, assessing performance, and making operating decisions. Rallybio's pipeline also includes RLYB332, a preclinical long-acting matriptase-2 antibody for the treatment of diseases of iron overload.
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Option exercise | 2 | 7,124 |
Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
9 Form 4 filings on record, the earliest from May 13, 2025, newest first.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Helen M. Boudreau | Option exercise | Common Stock | 3,562 | $2.38 | $8K | |
| Helen M. Boudreau | Option exercise | Option (Right to Buy) | 3,562 | $0.00 | - | |
| ADAR1 Capital Management, LLC - 10% Owner | Open-market purchase | Common Stock | 6,009 | $13.98 | $84K | |
| ADAR1 Capital Management, LLC - 10% Owner | Open-market purchase | Common Stock | 10,000 | $13.98 | $140K | |
| ADAR1 Capital Management, LLC - 10% Owner | Open-market purchase | Common Stock | 200 | $13.80 | $3K | |
| ADAR1 Capital Management, LLC - 10% Owner | Open-market purchase | Common Stock | 4,081 | $13.80 | $56K | |
| ADAR1 Capital Management, LLC - 10% Owner | Open-market purchase | Common Stock | 75,178 | $14.00 | $1.05M | |
| ADAR1 Capital Management, LLC - 10% Owner | Open-market purchase | Common Stock | 100 | $13.80 | $1K | |
| ADAR1 Capital Management, LLC - 10% Owner | Open-market purchase | Common Stock | 200 | $13.95 | $3K | |
| ADAR1 Capital Management, LLC - 10% Owner | Open-market purchase | Common Stock | 5,100 | $14.00 | $71K | |
| ADAR1 Capital Management, LLC - 10% Owner | Open-market purchase | Common Stock | 25,000 | $14.00 | $350K | |
| ADAR1 Capital Management, LLC - 10% Owner | Open-market purchase | Common Stock | 19,900 | $14.00 | $279K | |
| ADAR1 Capital Management, LLC - 10% Owner | Open-market purchase | Common Stock | 800 | $13.83 | $11K | |
| ADAR1 Capital Management, LLC - 10% Owner | Open-market purchase | Common Stock | 3,900 | $13.90 | $54K | |
| ADAR1 Capital Management, LLC - 10% Owner | Open-market purchase | Common Stock | 116,904 | $13.97 | $1.63M | |
| ADAR1 Capital Management, LLC - 10% Owner | Open-market purchase | Common Stock | 35,101 | $14.00 | $491K | |
 Jonathan I. Lieber - Officer | Grant or award | Common Stock | 2,500 | $0.00 | - | |
| Jonathan I. Lieber - Officer | Open-market sale | Common Stock | 789 | $5.06 | $4K | |
| Martin Mackay - Director | Grant or award | Option (Right to Buy) | 18,055 | $3.60 | $65K | |
| Ronald Hunt - Director | Grant or award | Option (Right to Buy) | 14,305 | $3.60 | $51K | |
| Ronald Hunt - Director | Grant or award | Option (Right to Buy) | 28,500 | $0.00 | - |
Rallybio Corp (RLYB) had 1 insider filing in the last 90 days, with the most recent on 2026-07-10. The full record for RLYB runs to 9 Form 4 filings, the earliest from 2025-05-13. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
No insider purchases of RLYB were filed in the last 90 days. 14 purchases are on record for this company.
No insider sales of RLYB were filed in the last 90 days. 1 sale is on record for this company.
This page tracks RLYB Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
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