Security key
75120L100
Rallybio Corporation - Common Stock, par value $0.0001 per share (RLYB)
CUSIP: 75120L100
Q3 2025 13F Holders as of 30 Sep 2025
- Security type / class
- Equity / Common Stock, par value $0.0001 per share
- Total 13F shares
- 28,293,762
- Total 13F value
- $14,121,676
- Share change
- -2,898,973
- SEC-reported price per share
- $0.50
- Number of holders
- 45
- Value change
- -$1,021,666
- Number of buys
- 13
- Number of sells
- 21
- Shares outstanding
- 5,294,835
Holder snapshot
6 signals
Security identity
1 source field
Report period
Q3 2025
Institutions
45
Top holders
10
RLYB full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q4 2025
Previous quarter: Q2 2025
Rallybio Corp SEC filings
Rallybio Corp company facts
Broader feeds
Reporting periods
Holder history for CUSIP 75120L100
Recent filing periods:
Ownership snapshot
Top reported holders of RLYB - Rallybio Corporation - 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
FMR LLC
Disclosed value leader
VIKING GLOBAL INVESTORS LP
Comparable rows
15/15
Latest evidence
30 Jun 2025
13F
13D/G
3/4/5
Lead comparable stake: 4.3%
13D/G row: FMR LLC
Showing 1-6 of 15 holder rows.
Quick read
FMR LLC leads the comparable SEC ownership view at 4.3%.
15 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.
Comparable ownership
Top 5
FMR LLC
4.3%
VIKING GLOBAL INVESTORS LP
79%
JOHNSON & JOHNSON
69%
5AM Venture Management, LLC
69%
New Leaf Venture Partners, L.L.C.
62%
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 |
|---|---|---|---|---|---|
| FMR LLC |
13F
13D/G
Company
|
4.3%
from 13D/G
|
$632,153
1,870,276 shares
|
— | 30 Jun 2025 |
| VIKING GLOBAL INVESTORS LP |
13F
3/4/5
Company · 10%+ Owner
|
79%
|
$1,417,835
4,194,777 shares
|
— | 30 Jun 2025 |
| JOHNSON & JOHNSON |
13F
Company
|
69%
|
$1,209,454
3,636,363 shares
|
— | 30 Jun 2025 |
| 5AM Venture Management, LLC |
13F
Company
|
69%
|
$1,227,185
3,630,724 shares
|
— | 30 Jun 2025 |
| New Leaf Venture Partners, L.L.C. |
13F
Company
|
62%
|
$1,115,942
3,301,603 shares
|
— | 30 Jun 2025 |
| TPG GP A, LLC |
13F
Company
|
57%
|
$1,023,604
3,028,414 shares
|
— | 30 Jun 2025 |
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 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
45
Shares
28,293,762
Rows available
45
| 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 2025 vs Q2 2025 Across Filers
Q2 2025 holders
48
Q3 2025 holders
45
Holder diff
-3
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 value | Q3 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend