Security key
75120L100
Rallybio Corporation - Common Stock, par value $0.0001 per share (RLYB)
CUSIP: 75120L100
Q1 2025 13F Holders as of 31 Mar 2025
- Security type / class
- Equity / Common Stock, par value $0.0001 per share
- Total 13F shares
- 32,001,262
- Total 13F value
- $20,918,290
- Share change
- -426,974
- SEC-reported price per share
- $0.65
- Number of holders
- 47
- Value change
- -$325,165
- Number of buys
- 11
- Number of sells
- 18
- Shares outstanding
- 5,294,835
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2025
Institutions
47
Top holders
10
RLYB full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 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
31 Dec 2024
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.
Open SEC evidence
Opens FMR LLC's linked filing trail.
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
|
$1,696,032
1,766,701 shares
|
— | 31 Dec 2024 |
| VIKING GLOBAL INVESTORS LP |
13F
3/4/5
Company · 10%+ Owner
|
79%
|
$4,026,986
4,194,777 shares
|
— | 31 Dec 2024 |
| JOHNSON & JOHNSON |
13F
Company
|
69%
|
$3,490,908
3,636,363 shares
|
— | 31 Dec 2024 |
| 5AM Venture Management, LLC |
13F
Company
|
69%
|
$3,485,495
3,630,724 shares
|
— | 31 Dec 2024 |
| New Leaf Venture Partners, L.L.C. |
13F
Company
|
62%
|
$3,169,539
3,301,603 shares
|
— | 31 Dec 2024 |
| TPG GP A, LLC |
13F
Company
|
57%
|
$2,907,277
3,028,414 shares
|
— | 31 Dec 2024 |
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 Q1 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
47
Shares
32,001,262
Rows available
47
| 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 Q1 2025 vs Q4 2025 Across Filers
Q4 2025 holders
44
Q1 2025 holders
47
Holder diff
3
| Investor | Q4 2025 Shares | Q1 2025 Shares | Share Diff | Share Chg % | Q4 2025 value | Q1 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend