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Rallybio Corp (RLYB)
United States · Delayed Price · Currency is USD
Pharmaceutical Preparations
16.65+0.16 (+0.97%)
Market cap
$88.5M
Analyst consensus
Insider Score
––Not scored
RLYB Insider Score
Insiders here have filed 11 Form 4s in the last 90 days, but all of them are share awards, grants or other non-market transactions. Those are compensation, not a decision to buy, so they are not scored.
RLYB Stock Insider Trading Activity
RLYB stock’s insider trading shows 14 purchases for an estimated $4.23M by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| Boudreau Helen M Director | Option exercise | 2,062 | $15.28 | $31.51K | 31.5% | 8,604 | Oct 16, 2026 | — | Form 4 |
| Soteropoulos Paula Director | Option exercise | 3,562 | $2.38 | $8.48K | 119% | 6,544 | Oct 16, 2026 | — | Form 4 |
| Hopfner Robert Lorne Director | Option exercise | 2,062 | $15.28 | $31.51K | 16.2% | 14,820 | Oct 12, 2026 | — | Form 4 |
| Hopfner Robert Lorne Director | Option exercise | 9,196 | $7.60 | $69.89K | New | 9,196 | Oct 12, 2026 | — | Form 4 |
| Hopfner Robert Lorne Director | Option exercise | 3,562 | $2.38 | $8.48K | 38.7% | 12,758 | Oct 12, 2026 | — | Form 4 |
| Lieber Jonathan I CFO | Option exercise | 3,910 | $6.08 | $23.77K | 40.1% | 13,650 | Oct 9, 2026 | — | Form 4 |
| Uden Stephen CEO | Option exercise | 22,456 | $6.08 | $136.53K | 24.1% | 115,620 | Oct 6, 2026 | — | Form 4 |
| Lieber Jonathan I CFO | Option exercise | 5,000 | $6.08 | $30.40K | 105% | 9,740 | Sep 29, 2026 | — | Form 4 |
| Liu Hui Director | Option exercise | 3,562 | $2.38 | $8.48K | New | 3,562 | Sep 24, 2026 | — | Form 4 |
| Liu Hui Director | Option exercise | 8,482 | $7.60 | $64.46K | 238% | 12,044 | Sep 24, 2026 | — | Form 4 |
| Chung Wendy Director | Option exercise | 3,562 | $2.38 | $8.48K | New | 3,562 | Sep 16, 2026 | — | Form 4 |
| Boudreau Helen M Director | Option exercise | 3,562 | $2.38 | $8.48K | 120% | 6,542 | Jul 6, 2026 | — | Form 4 |
| ADAR1 Capital Management, LLC Other | Buy | 10,000 | $13.98 | $139.80K | 1.1% | 926,152 | May 19, 2026 | — | Form 4 |
| ADAR1 Capital Management, LLC Other | Buy | 200 | $13.80 | $2.76K | 0.0% | 926,352 | May 19, 2026 | — | Form 4 |
| ADAR1 Capital Management, LLC Other | Buy | 6,009 | $13.98 | $84.01K | 0.7% | 916,152 | May 18, 2026 | — | Form 4 |
| Schneeberger Daniel Other | Buy | 200 | $13.95 | $2.79K | 0.0% | 910,143 | May 15, 2026 | — | Form 4 |
| Schneeberger Daniel Other | Buy | 100 | $13.80 | $1.38K | 0.0% | 909,943 | May 15, 2026 | — | Form 4 |
| Schneeberger Daniel Other | Buy | 75,178 | $14.00 | $1.05M | 9.0% | 909,843 | May 13, 2026 | — | Form 4 |
| Schneeberger Daniel Other | Buy | 4,081 | $13.80 | $56.32K | 0.5% | 834,665 | May 13, 2026 | — | Form 4 |
| ADAR1 Capital Management, LLC Other | Buy | 800 | $13.83 | $11.06K | 0.1% | 830,584 | May 12, 2026 | — | Form 4 |
| ADAR1 Capital Management, LLC Other | Buy | 19,900 | $14.00 | $278.60K | 2.5% | 829,784 | May 11, 2026 | — | Form 4 |
| ADAR1 Capital Management, LLC Other | Buy | 5,100 | $14.00 | $71.40K | 0.7% | 784,884 | May 11, 2026 | — | Form 4 |
| ADAR1 Capital Management, LLC Other | Buy | 25,000 | $14.00 | $350.00K | 3.2% | 809,884 | May 11, 2026 | — | Form 4 |
| Schneeberger Daniel Other | Buy | 35,101 | $14.00 | $491.41K | 4.7% | 779,784 | May 5, 2026 | — | Form 4 |
| Schneeberger Daniel Other | Buy | 3,900 | $13.90 | $54.21K | 0.6% | 627,779 | May 4, 2026 | — | Form 4 |
| Schneeberger Daniel Other | Buy | 116,904 | $13.97 | $1.63M | 18.6% | 744,683 | May 4, 2026 | — | Form 4 |
| Lieber Jonathan I CFO | Sell | 789 | $5.06 | $3.99K | 16.1% | 4,115 | Feb 23, 2026 | — | Form 4 |
| Lieber Jonathan I CFO | Award | 2,500 | — | — | 104% | 4,904 | Feb 18, 2026 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Buy (P) — Open-market or private purchase
- Sell (S) — Open-market or private sale
- Award (A) — Grant or award from the company, not a purchase
- Option exercise (M) — Exercise or conversion of an exempt derivative
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.