RLYB
Adar1 Capital Management, Llc, RLYB's 10% owner, spent $139.8K of their own money on 10,000 shares at $14, growing their stake 1%.
+$139.8K
10,000 sh @ $14
RLYB
Rallybio Corp
SEC CIK 1739410
$15.92
+217.9% · 90 days
90-day buys
$4.23M
14 open-market
90-day sells
$0
0 open-market
Net insider flow
+$4.23M
Net buying
Filings shown
16
Most recent
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At a glance
Over the last 90 days, insiders at RLYB have bought a net $4.23M of stock (14 open-market buys vs 0 sells).
Largest recent trade: Adar1 Capital Management, Llc, RLYB's 10% owner, spent $1.63M of their own money on 116,904 shares at $14, growing their stake 19%.
Most active filer: Adar1 Capital Management, Llc, with 14 transactions among the recent filings shown.
Insider transaction history
Form 4 filings for RLYB, newest firstRLYB
Adar1 Capital Management, Llc, RLYB's 10% owner, spent $2.8K of their own money on 200 shares at $14.
+$2.8K
200 sh @ $14
RLYB
Adar1 Capital Management, Llc, RLYB's 10% owner, spent $84K of their own money on 6,009 shares at $14, growing their stake 1%.
+$84K
6,009 sh @ $14
RLYB
Adar1 Capital Management, Llc, RLYB's 10% owner, spent $1.4K of their own money on 100 shares at $14.
+$1.4K
100 sh @ $14
RLYB
Adar1 Capital Management, Llc, RLYB's 10% owner, spent $2.8K of their own money on 200 shares at $14.
+$2.8K
200 sh @ $14
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RLYB
Adar1 Capital Management, Llc, RLYB's 10% owner, spent $56.3K of their own money on 4,081 shares at $14.
+$56.3K
4,081 sh @ $14
RLYB
Adar1 Capital Management, Llc, RLYB's 10% owner, spent $1.05M of their own money on 75,178 shares at $14, growing their stake 9%.
+$1.05M
75,178 sh @ $14
RLYB
Adar1 Capital Management, Llc, RLYB's 10% owner, spent $11.1K of their own money on 800 shares at $14.
+$11.1K
800 sh @ $14
RLYB
Adar1 Capital Management, Llc, RLYB's 10% owner, spent $71.4K of their own money on 5,100 shares at $14, growing their stake 1%.
+$71.4K
5,100 sh @ $14
RLYB
Adar1 Capital Management, Llc, RLYB's 10% owner, spent $350K of their own money on 25,000 shares at $14, growing their stake 3%.
+$350K
25,000 sh @ $14
RLYB
Adar1 Capital Management, Llc, RLYB's 10% owner, spent $278.6K of their own money on 19,900 shares at $14, growing their stake 2%.
+$278.6K
19,900 sh @ $14
RLYB
Adar1 Capital Management, Llc, RLYB's 10% owner, spent $491.3K of their own money on 35,101 shares at $14, growing their stake 5%.
+$491.3K
35,101 sh @ $14
RLYB
Adar1 Capital Management, Llc, RLYB's 10% owner, spent $54.2K of their own money on 3,900 shares at $14, growing their stake 1%.
+$54.2K
3,900 sh @ $14
RLYB
Adar1 Capital Management, Llc, RLYB's 10% owner, spent $1.63M of their own money on 116,904 shares at $14, growing their stake 19%.
+$1.63M
116,904 sh @ $14
RLYB
−$4K
789 sh @ $5
RLYB
+$0
2,500 sh
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About RLYB insider activity
This page tracks every recent Form 4 filed for Rallybio Corp with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.
The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.
Frequently asked questions
How often is RLYB insider data updated?
Continuously. We read from SEC EDGAR, so new Form 4 filings for Rallybio Corp usually appear here within minutes of being accepted by the SEC.
What does "net insider flow" mean?
It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.
Why do some rows show grants or option exercises instead of buys?
Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.
Is this investment advice?
No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.