1 tracked superinvestor hold RALLYBIO CORP (RLYB), worth $5M combined, led by Andreas Halvorsen. Smart money is trimming RLYB as of the latest 13F filings.
Current price
$15.83
Rallybio Corporation, a clinical-stage biotechnology company, engages in development and commercialization of life-transforming therapies for patients suffering from severe and rare diseases. Its lead product candidate is RLYB212, a monoclonal anti-HPA-1a antibody which is in Phase II clinical trial for the prevention of fetal and neonatal alloimmune thrombocytopenia (FNAIT); and RLYB211 for the…
Market cap
$50M
P/E
-5.92
Div yield
0.0%
Revenue YoY
34.9%
Analyst target
—
Snapshot for context. For deep analysis use a stock screener — this page is about who owns it.
Superinvestors holding
1
tracked 13F / N-PORT funds
Combined value
$5M
disclosed long exposure
Tier-1 conviction
1
concentrated holders
Net this quarter
-1
0 buying · 1 selling
Smart money is net reducing RLYB: 1 funds trimmed versus 0 adding.
RALLYBIO CORP (RLYB) is held by 1 tracked funds worth $5M combined, 1 of them concentrated Tier-1 managers whose positions carry real conviction.
The largest position belongs to Andreas Halvorsen at 0% of their book — no single tracked manager treats it as an outsized, top-weighted bet.
No tracked fund opened a new position this quarter; 0 added and 1 trimmed, a net reduction.
| Investor | Move | % of their portfolio | Position value |
|---|---|---|---|
| Trimmed | 0% | $5M |
Tier badge = signal quality: 1 concentrated conviction · 2 quant/multi (context) · 3 retail & diversified. Only Tier 1 holdings feed the consensus signal.
Which superinvestors own RLYB?
1 tracked funds hold RALLYBIO CORP (RLYB), the largest being Andreas Halvorsen (Viking Global Investors) at 0% of its 13F portfolio. 1 of them are concentrated Tier-1 conviction managers.
Is smart money buying or selling RLYB?
In the most recent 13F quarter, 0 tracked funds added or opened RLYB and 1 trimmed it.
How much RLYB do tracked funds hold?
Combined disclosed long exposure to RLYB across tracked superinvestors is $5M as of the Mar 2026 filings.
Holdings aggregated from the latest SEC 13F & N-PORT filings via FMP · Mar 2026 quarter. Long equity positions only, reported with up to a 45-day delay — for activity between filings see real-time moves. Not financial advice.