RLYB insider buying – Rallybio Corp
15 insider purchases since 2016 worth $35.6M by 11 different insiders. Last 12 months: 4 purchases, $4.2M. Most recent filing: 2026-05-20.
Small company Public float $11M (latest 10-K, SEC). Share prices of small companies usually swing much more than those of large ones, in both directions, and are easier to move with little trading.
Same time range as the chart above - each mark sits under the week of the trade. Circles = purchases (height = price paid, size = amount), red triangles = open-market sales of $50k+. Prices as reported, not adjusted for later stock splits.
Purchases are open-market buys (SEC Form 4, code "P") - insiders paying with their own money. Sales are open-market sales (code "S") of $50,000 or more; many sales are pre-planned (Rule 10b5-1) or made for taxes and diversification. Each row links to the original filing.
Bought, sold, still holding?
| Insider | Bought | First / last buy | Sold since 2016 | Holds now* | Status |
|---|---|---|---|---|---|
| Viking Global Opportunities Illiquid Investments Sub-Master LP 10% Owner | $10.5M 1× · 806,000 sh | 2021-07-29 2021-07-29 | – | 4,194,777 shares as of 2021-08-02 | Holds - never sold |
| 5AM Opportunities I, L.P. 10% Owner | $8.0M 1× · 615,384 sh | 2021-08-02 2021-08-02 | – | 1,406,098 shares as of 2021-08-04 | Holds - never sold |
| Hopfner Robert Lorne Director | $7.5M 1× · 576,923 sh | 2021-08-02 2021-08-02 | – | 1,694,388 shares as of 2021-08-04 | Holds - never sold |
| HUNT RONALD Director | $4.0M 1× · 307,692 sh | 2021-08-02 2021-08-02 | – | 2,301,603 shares as of 2021-08-04 | Holds - never sold |
| Schneeberger Daniel 10% Owner | $3.3M 2× · 235,464 sh | 2026-05-04 2026-05-13 | – | 909,943 shares as of 2026-05-15 | Holds - never sold |
| SHANNON TIMOTHY M Director | $999,999 1× · 76,923 sh | 2021-08-02 2021-08-02 | – | 2,332,789 shares as of 2021-08-04 | Holds - never sold |
| ADAR1 Capital Management, LLC 10% Owner | $937,630 2× · 67,009 sh | 2026-05-11 2026-05-18 | – | 926,352 shares as of 2026-05-20 | Holds - never sold |
| Fryer Jeffrey M Officer | $130,369 3× · 14,400 sh | 2022-01-07 2022-03-21 | – | 47,048 shares as of 2022-03-23 | Holds - never sold |
| MACKAY MARTIN CEO | $103,473 1× · 10,000 sh | 2022-01-10 2022-01-10 | – | 991,735 shares as of 2022-01-12 | Holds - never sold |
| Uden Stephen Officer | $98,502 1× · 10,000 sh | 2022-01-12 2022-01-12 | – | 714,127 shares as of 2022-01-14 | Holds - never sold |
| Lieber Jonathan I Officer | $26,050 1× · 5,000 sh | 2023-03-14 2023-03-14 | – | 4,904 shares as of 2026-02-23 | Holds - never sold |
* Shares held after the insider's most recent SEC filing for this company (all share classes, direct and indirect). If an insider stops filing, later changes are not known.
Insider buying and selling by year
| Year | Purchases | Bought | Buyers | Sales | Sold |
|---|---|---|---|---|---|
| 2026 | 4 | $4.2M | 2 | – | – |
| 2023 | 1 | $26,050 | 1 | 1 | $820,000 |
| 2022 | 5 | $332,344 | 3 | 3 | $5.9M |
| 2021 | 5 | $31.0M | 5 | – | – |
Insider purchases
| Filed | Insider | Role | Shares | Avg price | Value | Holdings | Filing |
|---|---|---|---|---|---|---|---|
| 2026-05-20 | ADAR1 Capital Management, LLC | 10% Owner | 16,209 | $13.98 | $226,566 | +1.8% | SEC |
| 2026-05-15 | Schneeberger Daniel | 10% Owner | 79,559 | $13.99 | $1.1M | +9.6% | SEC |
| 2026-05-13 | ADAR1 Capital Management, LLC | 10% Owner | 50,800 | $14.00 | $711,064 | +6.5% | SEC |
| 2026-05-06 | Schneeberger Daniel | 10% Owner | 155,905 | $13.97 | $2.2M | +25.0% | SEC |
| 2023-03-16 | Lieber Jonathan I | Officer | 5,000 | $5.21 | $26,050 | SEC | |
| 2022-03-23 | Fryer Jeffrey M | Officer | 3,000 | $8.04 | $24,120 | +6.8% | SEC |
| 2022-01-21 | Fryer Jeffrey M | Officer | 1,400 | $8.70 | $12,180 | +3.3% | SEC |
| 2022-01-14 | Uden Stephen | Officer | 10,000 | $9.85 | $98,502 | +1.4% | SEC |
| 2022-01-12 | MACKAY MARTIN | CEO | 10,000 | $10.35 | $103,473 | +3.7% | SEC |
| 2022-01-11 | Fryer Jeffrey M | Officer | 10,000 | $9.41 | $94,069 | +30.6% | SEC |
| 2021-08-04 | SHANNON TIMOTHY M | Director | 76,923 | $13.00 | $999,999 | +3.3% | SEC |
| 2021-08-04 | Hopfner Robert Lorne | Director | 576,923 | $13.00 | $7.5M | +34.1% | SEC |
| 2021-08-04 | HUNT RONALD | Director | 307,692 | $13.00 | $4.0M | +15.4% | SEC |
| 2021-08-04 | 5AM Opportunities I, L.P. | 10% Owner | 615,384 | $13.00 | $8.0M | +77.8% | SEC |
| 2021-08-02 | Viking Global Opportunities Illiquid Investments Sub-Master LP | 10% Owner | 806,000 | $13.00 | $10.5M | +23.8% | SEC |
Insider sales
| Filed | Insider | Role | Shares | Avg price | Value | Type | Filing |
|---|---|---|---|---|---|---|---|
| 2023-03-09 | Schwab Andrew J. | 10% Owner | 100,000 | $8.20 | $820,000 | Sale | SEC |
| 2022-06-07 | 5AM Partners V, LLC | 10% Owner | 150,000 | $12.50 | $1.9M | Sale | SEC |
| 2022-05-25 | 5AM Partners V, LLC | 10% Owner | 100,000 | $13.00 | $1.3M | Sale | SEC |
| 2022-02-10 | PARMAR KUSH | Director | 210,000 | $13.05 | $2.7M | Sale | SEC |
Compiled automatically from public SEC filings. Not investment advice. Get every new insider purchase in the daily report.
Get every new insider purchase the day it's filed
Daily report with all SEC insider buys, cluster buys, company events and the crypto money-flow radar.
Get started free