Rallybio Corp (RLYB) Insider Trading
Directors, officers and holders of more than 10% of RLYB report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 75 transactions on file: 8 with code P, 1 with code S and 41 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 29, 2026 | HUNT RONALD | Director | M Exercise | 9,196 | $5.60 | $51,498 |
| Oct 29, 2026 | HUNT RONALD | Director | M Exercise | 3,562 | Not measured | Not measured |
| Oct 29, 2026 | HUNT RONALD | Director | M Exercise | 9,196 | $7.60 | $69,890 |
| Oct 29, 2026 | HUNT RONALD | Director | M Exercise | 3,562 | $2.38 | $8,478 |
| Oct 29, 2026 | Lieber Jonathan I | Chief Financial Officer | M Exercise | 13,589 | $6.08 | $82,621 |
| Oct 29, 2026 | Lieber Jonathan I | Chief Financial Officer | M Exercise | 7,875 | $14.88 | $117,180 |
| Oct 29, 2026 | Lieber Jonathan I | Chief Financial Officer | M Exercise | 7,875 | Not measured | Not measured |
| Oct 29, 2026 | Lieber Jonathan I | Chief Financial Officer | M Exercise | 13,589 | Not measured | Not measured |
| Oct 29, 2026 | HUNT RONALD | Director | M Exercise | 2,062 | $15.28 | $31,507 |
| Oct 29, 2026 | HUNT RONALD | Director | M Exercise | 2,062 | Not measured | Not measured |
| Oct 28, 2026 | Nash Christine A | Director | M Exercise | 3,562 | Not measured | Not measured |
| Oct 28, 2026 | Nash Christine A | Director | M Exercise | 3,562 | $2.38 | $8,478 |
| Oct 27, 2026 | Uden Stephen | Chief Executive Officer | M Exercise | 33,244 | $6.08 | $202,124 |
| Oct 27, 2026 | Uden Stephen | Chief Executive Officer | M Exercise | 33,244 | Not measured | Not measured |
| Oct 27, 2026 | Lieber Jonathan I | Chief Financial Officer | S Sale | 599 | $16.04 | $9,608 |
| Oct 26, 2026 | Chung Wendy | Director | M Exercise | 2,062 | Not measured | Not measured |
| Oct 26, 2026 | Chung Wendy | Director | M Exercise | 2,062 | $15.28 | $31,507 |
| Oct 26, 2026 | Lieber Jonathan I | Chief Financial Officer | A Award | 2,500 | Not measured | Not measured |
| Oct 16, 2026 | Boudreau Helen M | Director | M Exercise | 2,062 | Not measured | Not measured |
| Oct 16, 2026 | Soteropoulos Paula | Director | M Exercise | 3,562 | $2.38 | $8,478 |
| Oct 16, 2026 | Soteropoulos Paula | Director | M Exercise | 3,562 | Not measured | Not measured |
| Oct 16, 2026 | Boudreau Helen M | Director | M Exercise | 2,062 | $15.28 | $31,507 |
| Oct 12, 2026 | Hopfner Robert Lorne | Director | M Exercise | 3,562 | Not measured | Not measured |
| Oct 12, 2026 | Hopfner Robert Lorne | Director | M Exercise | 9,196 | $0.5600 | $5,150 |
| Oct 12, 2026 | Hopfner Robert Lorne | Director | M Exercise | 2,062 | $15.28 | $31,507 |
| Oct 12, 2026 | Hopfner Robert Lorne | Director | M Exercise | 3,562 | $2.38 | $8,478 |
| Oct 12, 2026 | Hopfner Robert Lorne | Director | M Exercise | 9,196 | $7.60 | $69,890 |
| Oct 12, 2026 | Hopfner Robert Lorne | Director | M Exercise | 2,062 | Not measured | Not measured |
| Oct 9, 2026 | Lieber Jonathan I | Chief Financial Officer | M Exercise | 3,910 | Not measured | Not measured |
| Oct 9, 2026 | Lieber Jonathan I | Chief Financial Officer | M Exercise | 3,910 | $6.08 | $23,773 |
| Oct 6, 2026 | Uden Stephen | Chief Executive Officer | M Exercise | 22,456 | Not measured | Not measured |
| Oct 6, 2026 | Uden Stephen | Chief Executive Officer | M Exercise | 22,456 | $6.08 | $136,532 |
| Sep 29, 2026 | Lieber Jonathan I | Chief Financial Officer | M Exercise | 5,000 | $6.08 | $30,400 |
| Sep 29, 2026 | Lieber Jonathan I | Chief Financial Officer | M Exercise | 5,000 | Not measured | Not measured |
| Sep 24, 2026 | Liu Hui | Director | M Exercise | 3,562 | $2.38 | $8,478 |
| Sep 24, 2026 | Liu Hui | Director | M Exercise | 3,562 | Not measured | Not measured |
| Sep 24, 2026 | Liu Hui | Director | M Exercise | 8,482 | $5.60 | $47,499 |
| Sep 24, 2026 | Liu Hui | Director | M Exercise | 8,482 | $7.60 | $64,463 |
| Sep 16, 2026 | Chung Wendy | Director | M Exercise | 3,562 | Not measured | Not measured |
| Sep 16, 2026 | Chung Wendy | Director | M Exercise | 3,562 | $2.38 | $8,478 |
| Jul 6, 2026 | Boudreau Helen M | Director | M Exercise | 3,562 | $2.38 | $8,478 |
| Jul 6, 2026 | Boudreau Helen M | Director | M Exercise | 3,562 | Not measured | Not measured |
| May 19, 2026 | ADAR1 Capital Management, LLC | 10% Owner | P Purchase | 200 | $13.80 | $2,760 |
| May 19, 2026 | ADAR1 Capital Management, LLC | 10% Owner | P Purchase | 10,000 | $13.98 | $139,822 |
| May 18, 2026 | ADAR1 Capital Management, LLC | 10% Owner | P Purchase | 6,009 | $13.98 | $83,981 |
| May 15, 2026 | ADAR1 Capital Management, LLC | 10% Owner | P Purchase | 100 | $13.80 | $1,380 |
| May 15, 2026 | ADAR1 Capital Management, LLC | 10% Owner | P Purchase | 200 | $13.95 | $2,790 |
| May 13, 2026 | ADAR1 Capital Management, LLC | 10% Owner | P Purchase | 75,178 | $14.00 | $1,052,492 |
| May 13, 2026 | ADAR1 Capital Management, LLC | 10% Owner | P Purchase | 4,081 | $13.80 | $56,315 |
| May 12, 2026 | ADAR1 Capital Management, LLC | 10% Owner | P Purchase | 800 | $13.83 | $11,063 |
The full Form 4 history is on the RLYB company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.