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Rallybio Corp (NASDAQ:RLYB)

US · Delayed Price · Currency is USD
16.87-0.06 (-0.35%)
 
Market Cap89.53M+267.9%
Revenue (ttm)646.00K-15.1%
Net Income45.55M+209.4%
EPS7.80+203.7%
Shares Out5.31M
PE Ratio2.14
Forward PEn/a
Dividendn/a
Ex-Dividend Daten/a
Volume951
Open16.96
Previous Close16.93
Day's Range16.82 - 16.97
52-Week Range3.67 - 17.57
Betan/a
AnalystsHold
Price Targetn/a
Earnings DateNov 5, 2026
-0.35% (1D)
No price history available.
Insider Score
––Not scored
RLYB Insider Score

Insiders here have filed 4 Form 4s in the last 90 days, but all of them are share awards, grants or other non-market transactions. Those are compensation, not a decision to buy, so they are not scored.

About RLYB

Rallybio Corporation is a clinical-stage biotechnology firm dedicated to discovering and bringing to market transformative therapies for individuals facing severe and uncommon illnesses. Its most advanced therapeutic candidate, RLYB212, is a monoclonal anti-HPA-1a antibody currently undergoing Phase II clinical trials. This candidate, along with RLYB211, is aimed at preventing fetal and neonatal alloimmune thrombocytopenia (FNAIT). The company's pipeline also includes RLYB114, a pegylated complement factor 5 (C5)-targeted Affibody molecule in preclinical development for addressing ophthalmic conditions driven by complement system activity. Furthermore, RLYB116, an inhibitor designed to target complement component 5 (C5) for various complement dysregulation disorders, has successfully completed its Phase 1 trial. Another preclinical antibody, RLYB332, is under investigation for treating severe anemia characterized by ineffective erythropoiesis and iron overload. Rallybio has established strategic collaborations to further its development efforts. It maintains an alliance with AbCellera for the identification, development, and commercialization of novel antibody-based therapeutics in rare diseases. Additionally, the firm partners with Exscientia on the creation of small molecule therapeutics for rare diseases, and with Johnson & Johnson to deliver therapeutic options to expectant mothers at risk of fetal and neonatal alloimmune thrombocytopenia. Established in 2018, Rallybio Corporation is headquartered in New Haven, Connecticut.

Address
234 Church Street, New Haven, CT, 06510, US
Market Cap
90 million
Employees
7
Industrial Classification
Biotechnology

What Are Insiders Doing?

Open-market buy / sell balanceNet Buying
Sold
$3.99K
Bought
$4.23M

View the trades behind this meter — each links to its SEC Form 4 →

Open-market Form 4 purchases (code P) vs sales (code S) on file for this company. Grants, option exercises and tax withholdings are excluded. Informational only.

1 Day
+0.18%
5 Days
+1.62%
1 Month
+2.11%
6 Months
+106.33%
1 Year
+267.90%

$RLYB stock is featured in our Insider Trades datasets.

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Recently reported changes in RLYB holdings by institutional investors

Scanning latest 13F filings…

Latest 0 13F filings · Source: SEC EDGAR

View all institutional owners →

Insider Trading

Quarterly net insider trading by RLYB's directors and management

Net Shares Purchased by Insiders−400k−200k02025Q42026Q12026Q22026Q32026Q4

Source: SEC EDGAR (Form 4)

Corporate Lobbying

RLYB Estimated quarterly lobbying spending

Source: U.S. Senate LDA

U.S. Patents

New RLYB patent grants

Loading patent grants…

Source: USPTO Open Data Portal

Government Contracts

Estimated quarterly amount awarded to RLYB from public contracts

Source: USAspending.gov

Top ETF Holders

ETFs with the largest estimated holdings in RLYB

ETFEst. Holding Size
VTIVanguard Morningstar Total Stock Market ETF$2.26M
VXFVanguard Extended Market ETF$544.79K
IWCiShares Micro-Cap ETF$203.14K
DFASDimensional - US Small Cap ETF$114.01K
DFMCU.S. Micro Cap Portfolio ETF$100.62K
AVSCAvantis U.S. Small Cap Equity ETF$26.68K

Estimated from each fund’s disclosed top holdings × AUM

RLYB Insider Score

Our composite score: insider buying, sector, volume, tone & dilution

No Insider Score for RLYB yet — no open-market insider buys or sells in the last 90 days.

Bull Case vs Bear Case

AI-generated from RLYB’s recent data — informational, not investment advice

Generating analysis…

Recent Insider Activity

Buys
14
Sells
1
Buy Value
$4.23M
Distinct Buyers
2

Frequently Asked Questions

Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.