Rallybio Corp - Common Stock, par value $0.0001 per share (RLYB)

CUSIP: 75120L209

Q3 2026 13F Holders as of 30 Sep 2026

Security type / class
Equity / Common Stock, par value $0.0001 per share
Total 13F shares
942
Total 13F value
$16,203
Holder snapshot 5 signals
Share change
-429
SEC-reported price per share
$17.20
Number of holders
3
Value change
-$7,377
Number of sells
1
Security identity Names, identifiers, and filing context for this profile. 1 source field
Shares outstanding
5,292,753

Security key

75120L209

Report period

Q3 2026

Institutions

3

Top holders

3

RLYB full security history Ownership snapshot Full 13F holder table Previous quarter: Q2 2026 Rallybio Corp SEC filings Rallybio Corp company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Ownership snapshot

Top reported holders of RLYB - Rallybio Corp - Common Stock, par value $0.0001 per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
ADAR1 Capital Management,...
Disclosed value leader
5AM Opportunities I, L.P.
Comparable rows
6/15
Latest evidence
30 Jun 2026
13F 13D/G 3/4/5 Lead comparable stake: 18% 9 rows are not safely comparable across share classes. 13D/G row: ADAR1 Capital Management, LLC Showing 1-6 of 15 holder rows.

Quick read

ADAR1 Capital Management, LLC leads the comparable SEC ownership view at 18%.

6 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens ADAR1 Capital Management, LLC's linked filing trail.
Comparable ownership Top 5
ADAR1 Capital Management, LLC 18%
FMR LLC 15%
VIKING GLOBAL INVESTORS LP 10%
TPG GP A, LLC 7.2%
Nantahala Capital Management, LLC 3.6%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
ADAR1 Capital Management, LLC
13F 13D/G 3/4/5
Company · 10%+ Owner
13F 13D/G 3/4/5
18%
Reported 13D/G · 31 May 2026
$14,821,632
926,352 shares
 — 30 Jun 2026
FMR LLC
13D/G 3/4/5 13F
Other*, 10%+ Owner · Company
13D/G 3/4/5 13F
15%
Reported 13D/G · 30 Jun 2026
$12,715,520
794,720 shares
 +$3,726,752 30 Jun 2026
VIKING GLOBAL INVESTORS LP
13F 13D/G 3/4/5
Company · 10%+ Owner
13F 13D/G 3/4/5
10%
Reported 13D/G · 31 Mar 2026
$8,389,552
524,347 shares
 — 30 Jun 2026
TPG GP A, LLC
13F 13D/G
Company
13F 13D/G
7.2%
Reported 13D/G · 01 Mar 2026
$6,056,816
378,551 shares
 — 30 Jun 2026
Nantahala Capital Management, LLC
13D/G 13F
Company
13D/G 13F
3.6%
Reported 13D/G · 30 Jun 2026
$3,014,752
188,422 shares
 $0 30 Jun 2026
JOHNSON & JOHNSON
13D/G
13D/G
2.9%
Reported 13D/G · 31 Mar 2026
$88,683
152,901 shares
 $0 31 Mar 2026
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q3 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions
3
Shares
942
Rows available
3
Investor Option Weight % Change % SEC-reported value * Price Shares Share Change Activity Report Period

* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q3 2026 vs Q2 2026 Across Filers

Q2 2026 holders
37
Q3 2026 holders
3
Holder diff
-34
Investor Q2 2026 Shares Q3 2026 Shares Share Diff Share Chg % Q2 2026 value Q3 2026 value Value change Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
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