Latest Period
Q1 2026
Security Snapshot
Rallybio Corporation - Common Stock, par value $0.0001 per share (RLYB) Institutional Ownership
CUSIP: 75120L100
13F Institutional Holders and Ownership History from Q3 2021 to Q1 2026
Institutions Reporting
0
Shares (Excl. Options)
0
Price
$0.58
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- Security type / class
- Equity / Common Stock, par value $0.0001 per share
- Symbol
- RLYB on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 0
- Total 13F value
- $0
- Share change
- -23,149,261
- Value change
- -$15,892,464
- Number of holders
- 0
- Shares outstanding
- 5,294,835
- SEC-reported price per share
- $0.58
Latest holder snapshot
4 signals
Issuer context
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- RLYB - Rallybio Corporation - Common Stock, par value $0.0001 per share is tracked under CUSIP 75120L100.
- 0 institutions reported positions in Q1 2026.
- 8 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 44 to 0 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $16,590,283 to $0.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 0 institutions filings for Q1 2026.
Security key
75120L100
Latest holder period
Q1 2026
13F holders
0
13D/G owners
8
CIK / CUSIP context first
Open Q1 2026 holders
RLYB full holder history
Rallybio Corp SEC filings
Rallybio Corp company facts
Rallybio Corp insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 75120L100:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
8
Security
RLYB
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| FMR LLC | 4.3% | $441,675 | 1,766,701 | FMR LLC | 31 Dec 2024 | |||
| VIKING GLOBAL INVESTORS LP | 10% | 0% | $306,793 | -$2,142,529 | 528,954 | -87% | VIKING GLOBAL INVESTORS LP | 31 Mar 2026 |
| Cormorant Asset Management, LP | 7.6% | $232,000 | 400,000 | Cormorant Asset Management, LP | 31 Mar 2026 | |||
| TPG GP A, LLC | 7.2% | $219,560 | 378,551 | TPG GP A, LLC | 01 Mar 2026 | |||
| BALYASNY ASSET MANAGEMENT L.P. | 7.1% | $218,412 | 376,573 | Balyasny Asset Management L.P. | 31 Mar 2026 | |||
| Laurion Capital Management LP | 5.7% | $175,598 | 302,756 | Laurion Capital Management LP | 31 Mar 2026 | |||
| Nantahala Capital Management, LLC | 5.7% | $174,368 | 300,635 | Nantahala Capital Management, LLC | 31 Mar 2026 | |||
| JOHNSON & JOHNSON | 2.9% | $88,683 | 152,901 | Johnson & Johnson | 31 Mar 2026 |
As of 31 Mar 2026, 0 institutional investors reported holding 0 shares of Rallybio Corporation - Common Stock, par value $0.0001 per share (RLYB). This represents 0% of the company’s total 5,294,835 outstanding shares.
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
19
Latest
Q1 2026
Rows shown
1-19 of 19
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 0 | $0 | -$15,892,464 | $0.58 | 0 |
| 2025 Q4 | 24,166,490 | $16,590,283 | -$46,693 | $0.69 | 44 |
| 2025 Q3 | 28,293,762 | $14,121,676 | -$1,021,666 | $0.50 | 45 |
| 2025 Q2 | 31,192,738 | $10,521,574 | -$558,784 | $0.34 | 48 |
| 2025 Q1 | 32,001,262 | $20,918,290 | -$325,165 | $0.65 | 47 |
| 2024 Q4 | 32,428,353 | $31,130,298 | -$372,186 | $0.96 | 49 |
| 2024 Q3 | 31,212,752 | $36,517,099 | -$480,838 | $1.17 | 49 |
| 2024 Q2 | 31,632,749 | $42,387,896 | +$1,547,544 | $1.34 | 64 |
| 2024 Q1 | 30,198,382 | $55,866,389 | -$3,948,463 | $1.85 | 59 |
| 2023 Q4 | 31,751,116 | $75,885,524 | +$1,489,758 | $2.39 | 53 |
| 2023 Q3 | 31,203,619 | $105,155,071 | -$1,411,692 | $3.37 | 58 |
| 2023 Q2 | 33,260,971 | $188,259,076 | +$6,505,885 | $5.66 | 57 |
| 2023 Q1 | 32,110,359 | $183,344,535 | -$1,268,660 | $5.71 | 51 |
| 2022 Q4 | 32,312,322 | $212,289,584 | +$34,532,833 | $6.57 | 55 |
| 2022 Q3 | 27,791,116 | $402,136,609 | +$2,162,886 | $14.47 | 50 |
| 2022 Q2 | 27,659,695 | $208,831,000 | -$776,317 | $7.55 | 44 |
| 2022 Q1 | 27,776,100 | $193,896,000 | +$124,771 | $6.98 | 47 |
| 2021 Q4 | 26,674,067 | $252,852,000 | +$1,365,608 | $9.54 | 37 |
| 2021 Q3 | 24,054,356 | $419,896,000 | +$419,896,000 | $17.58 | 33 |