OQROGet OQRO Pro
Insider trade

Rallybio (RLYB)10% owner bought ~$1.05M

ADAR1 Capital Management, 10% owner at Rallybio, bought ~$1.05M of Rallybio shares.

~$1.05M
Approx. value · 75K sh @ $14.00
910K
Holds after · shares reported
Traded
May 13, 2026
Filed
May 16, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

  1. Mar 31, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On March 31, 2026, Rallybio Corporation (Rallybio) announced that Steven Ryder, M.D., who has served as Rallybio’s Chief Medical Officer since January 2019, will leave Rallybio effective immediately.”
  2. May 3, 2026Company filing · Form 8-K · Agreement endedEnded an important agreement
  3. May 4, 2026Insider · 1 personInsiders: 2 purchases (~$1.7M)
  4. May 5, 2026Insider10% owner purchased ~$491K of RLYB shares in the open market
  5. May 11, 2026Insider · 1 personInsiders: 3 purchases (~$700K)
  6. May 12, 2026Insider10% owner purchased ~$11K of RLYB shares in the open market
  7. May 13, 2026 · this disclosureInsider10% owner purchased ~$1.05M of RLYB shares in the open market

What came next

  1. May 13, 2026Insider10% owner purchased ~$56K of RLYB shares in the open market
  2. May 15, 2026Insider · 1 personInsiders: 2 purchases (~$4K)
  3. May 18, 2026Insider · 13 days before an 8-K10% owner purchased ~$84K of RLYB shares in the open market
  4. May 19, 2026Insider · 1 personInsiders: 2 purchases (~$143K)
  5. May 31, 2026Company filing · Form 8-K · Material agreement, Unregistered sharesControl of the company changed hands, and changed a top executive or board member (and 3 more items)“To the extent required by this Item, the information included in Item 1.01 of this Current Report on Form 8-K is incorporated herein by reference.”
  6. Sep 8, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On September 8, 2026, Rallybio Corporation (Rallybio) announced that Jonathan Lieber, Rallybio’s Chief Financial Officer, will transition to part-time employment status effective September 15, 2026 (the Employment Transition Date), but will remain Rallybio’s Chief Financial Officer and Principal Financial Officer and continue to have the same duties and authority following the Employment Transition Date.”
View the official recordSEC Form 4

How to read SEC Form 4

Form 4 is the filing that officers, directors and owners of more than 10% of a US-listed company must send to the SEC within two business days after they buy, sell or otherwise change their holding of the company's stock.

Full guide: What is an SEC Form 4?

What else is on file for Rallybio

OQRO holds no insider, Congress, fund or contract record for Rallybio dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its RLYB page.

Other recent filings by ADAR1 Capital Management, LLC, 10% owner

The full history of ADAR1 Capital Management, LLC, 10% owner is on the profile page.

How this filing works

Other disclosures at Rallybio

Everything OQRO holds on this company is on its RLYB page.

This is one filing. OQRO holds the rest

Insider trades filed with the SEC, stock trades disclosed by members of Congress, fund holdings from 13F filings and federal contract awards, each one in plain words next to its official filing. On this page it opens why the trade stands out, what the company did around that time, the price since, and every field of the form.

Unlock OQRO ProAlready have an account? Log in

OQRO Pro is a paid subscription. You see the price before you pay

OQRO describes public disclosures and context calculated from them. It does not give personalized advice and does not recommend any transaction. How OQRO treats data