Security key
75120L100
Rallybio Corporation - Common Stock, par value $0.0001 per share (RLYB)
CUSIP: 75120L100
Q3 2021 13F Holders as of 30 Sep 2021
- Security type / class
- Equity / Common Stock, par value $0.0001 per share
- Total 13F shares
- 24,054,356
- Total 13F value
- $419,896,000
- Share change
- +24,054,356
- SEC-reported price per share
- $17.58
- Number of holders
- 33
- Value change
- +$419,896,000
- Number of buys
- 33
- Shares outstanding
- 5,294,835
Holder snapshot
5 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2021
Institutions
33
Top holders
10
RLYB full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q4 2021
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
5AM Ventures V, L.P.
Disclosed value leader
5AM Ventures V, L.P.
Comparable rows
0/1
Latest evidence
29 Jul 2021
3/4/5
Highest disclosed value: $22,833,933
1 rows are not safely comparable across share classes.
Quick read
5AM Ventures V, L.P. has the largest disclosed position value at $22.83M.
0 of 1 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 5AM Ventures V, L.P.'s linked filing trail.
Disclosed position value
Top 1
5AM Ventures V, L.P.
$22.83M
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-1 of 1 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| 5AM Ventures V, L.P. |
3/4/5
10%+ Owner
|
—
class O/S missing
|
$22,833,933
2,784,626 shares
|
— | 29 Jul 2021 |
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 2021
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
33
Shares
24,054,356
Rows available
33
| 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 2021 vs Q4 2025 Across Filers
Q4 2025 holders
44
Q3 2021 holders
33
Holder diff
-11
| Investor | Q4 2025 Shares | Q3 2021 Shares | Share Diff | Share Chg % | Q4 2025 value | Q3 2021 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend