Rallybio Corporation (RLYB)
Nasdaq: RLYB · Pharmaceutical Preparations · New Haven, CT · filing with the SEC since 2018
Who owns Rallybio Corporation
As filed with the SECHolders of 5% or more
4
ADAR1 Capital Management, LLC holds 17.5% of Common Stock, par value $0.0001 per share, as its SCHEDULE 13G filed Jun 5, 2026 says.
Directors and officers
10
report now, of 15 people on the record since 2021. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 4 named at left.
Holders of 5% or moreshare of the class, as filed
ADAR1 Capital Management, LLC
SCHEDULE 13G · filed Jun 5, 2026 · Common Stock, par value $0.0001 per share
Fmr LLC
SCHEDULE 13G/A · filed Aug 6, 2026 · COMMON STOCK · 10.6% in Mar 6, 2026
Viking Global Investors LP
SCHEDULE 13G/A · filed May 15, 2026 · Common Stock, par value $0.0001 per share · 9.99% in Feb 17, 2026
Tpg Gp A, LLC
SCHEDULE 13D/A · filed Mar 3, 2026 · Common Stock, par value $0.0001 per share
Nantahala Capital Management, LLC
SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock, par value $0.0001 per share · reported falling below 5%, from 5.68% in May 15, 2026
Johnson & Johnson
SCHEDULE 13G/A · filed Apr 13, 2026 · Common Stock, $0.0001 par value · reported falling below 5%
Cormorant Asset Management, LP
SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock, par value $0.0001 per share · reported falling below 5%, from 7.56% in May 15, 2026
Balyasny Asset Management L.P.
SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock · reported falling below 5%, from 7.12% in May 15, 2026
Laurion Capital Management LP
SCHEDULE 13G/A · filed Aug 4, 2026 · Common Stock, par value $0.0001 per share · reported falling below 5%, from 5.72% in Apr 29, 2026
5AM Ventures V, L.P.
SCHEDULE 13D/A · filed May 6, 2026 · Common Stock, par value $0.0001 per share · reported falling below 5%, from 5.5% in Feb 27, 2026
What RLYB reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Rallybio
An entity · legal entity · owns, named in the 10-K filed Mar 16, 2026
RE Ventures I, LLC
An investee · investee · invested in, named in the 10-K filed Mar 16, 2026
License Rights
A company bought · asset acquisition · owns, named in the 10-K filed Mar 16, 2026
6 subsidiaries in 1 country, from the list filed with the 10-K filed Mar 12, 2024.
Insider tradesForm 4
2sales
0purchases
0sales on a scheduled plan
1people selling
$0sold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Nov 5, 2025 to Nov 5, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 5, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window3 of 32 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Adar1 Capital Management, LLC | 10% owner | 0 | $0 | 0 | 7 | $900,000 |
| Schneeberger Daniel | 10% owner | 0 | $0 | 0 | 7 | $3.3M |
| Lieber Jonathan I | Chief Financial Officer | 2 | $0 | 0 | 0 | $0 |