Rallybio Corp
RLYB- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001739410
No open-market purchases or sales by Rallybio Corp insiders were filed in the last 90 days; 37 institutions reported holding it in 13F filings for Q2 2026, worth $68.1M in total; Viking Global Investors is the only superinvestor holding it.
Key figures
- Insider buysOpen market, last 90 days
- 0
- Insider sellsOpen market, last 90 days
- 0
- 13F holdersQ2 2026, −1 vs. previous quarter
- 37
- 13F valueReported value at the end of Q2 2026
- $68.1M
- Superinvestors holdingAt the end of Q2 2026
- 1
Price chart
Superinvestors holding RLYB, Q2 2026
1 superinvestor reports holding Rallybio Corp on Form 13F. Percentages are the stock's share of each portfolio.
Viking Global Investors
Andreas Halvorsen
<0.1%
Rallybio Corp's share of the portfolio
- Shares
- 524,347
- Value
- $8.39M
Latest insider trades
Open-market purchases and sales by Rallybio Corp insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| May 20, 2026 (view filing)8:45 PM ET | May 18-19 | 2 days | Schneeberger Daniel and 1 other10% Owner | PPurchase | +16.2K | $13.98 | +$226.6K | +1.8%926.4K after | 3 lots |
| May 15, 2026 (view filing)8:49 PM ET | May 13-15 | 2 days | Schneeberger Daniel and 1 other10% Owner | PPurchase | +79.6K | $13.99 | +$1.11M | +9.6%910.1K after | 4 lots |
| May 13, 2026 (view filing)9:22 PM ET | May 11-12 | 2 days | Schneeberger Daniel and 1 other10% Owner | PPurchase | +50.8K | $14.00 | +$711.1K | +6.5%830.6K after | 4 lots |
| May 6, 2026 (view filing)9:32 PM ET | May 4-5 | 2 days | Schneeberger Daniel and 1 other10% Owner | PPurchase | +155.9K | $13.97 | +$2.18M | +25.0%779.8K after | 3 lots |
| Feb 23, 2026 (view filing) | Feb 23 | Same day | Lieber Jonathan IChief Financial Officer | SSale | −789 | $5.06 | −$3.99K | −16.1%4.12K after | |
| Mar 16, 2023 (view filing) | Mar 14 | 2 days | Lieber Jonathan ISee Remarks | PPurchase | +5.00K | $5.21 | +$26.1K | New position5.00K after | |
| Mar 9, 2023 (view filing)4:35 PM ET | Mar 7 | 2 days | Rocklage Scott M and 3 others10% Owner | SSale | −100.0K | $8.20 | −$820.0K | −4.0%2.38M after | Duplicate filing |
| Mar 9, 2023 (view filing) | Mar 7 | 2 days | Parmar KushDirector | SSale | −100.0K | $8.20 | −$820.0K | −4.0%2.38M after | |
| Nov 17, 2022 (view filing)4:30 PM ET | Nov 15 | 2 days | Viking Global Investors LP and 7 others10% Owner | PPurchase | +3.33M | $6.00 | +$20.0M | –3.33M after | Derivative |
| Jun 7, 2022 (view filing)5:02 PM ET | Jun 3 | 4 days | Rocklage Scott M and 5 others10% Owner | SSale | −150.0K | $12.50 | −$1.88M | −5.7%2.48M after | 2 lots |
Top 10 13F holders, Q2 2026
The largest institutional positions in Rallybio Corp at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| ADAR1 Capital Management, LLC | 926,352 | $14.8M | 0.70% | +905,817+4,411.1% | Added |
| FMR LLC | 794,720 | $12.7M | 0.00% | +1,269+0.2% | Added |
| Viking Global Investors LPSuperinvestorViking Global Investors | 524,347 | $8.39M | 0.02% | 00.0% | Unchanged |
| TPG GP A, LLC | 378,551 | $6.06M | 0.12% | 00.0% | Unchanged |
| Nantahala Capital Management, LLC | 376,844 | $6.03M | 0.18% | +76,209+25.3% | Added |
| Pivotal bioVenture Partners Investment Advisor LLC | 300,579 | $4.81M | 1.56% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 199,907 | $3.20M | 0.00% | +43,380+27.7% | Added |
| Vanguard Capital Management LLC | 172,497 | $2.76M | 0.00% | +60,457+54.0% | Added |
| Almitas Capital LLC | 120,682 | $1.93M | 0.46% | −70,524−36.9% | Reduced |
| Rangeley Capital, LLC | 104,850 | $1.68M | 1.56% | +74,720+248.0% | Added |