$RLYB
Rallybio Corporation Common Stock
XNAS•Health Care•Pharmaceutical Preparations
Why is RLYB up today? It is at $16.83 (+1.39%). See the catalyst behind the move, real-time alerts the moment RLYB spikes, and full due diligence on RLYB — key stats, earnings, dilution and insider activity. Free.
Get free $RLYB alerts the moment volume spikes
Be first to know when $RLYB makes an unusual move. Create a free account to track $RLYB, build a watchlist, and get instant unusual-volume alerts, with a full day of premium now and 5 more when you verify your email, no card needed.
No card · 5 premium days · join 800+ traders
Key Stats
- Price
- $16.83
- Change today
- +1.39%
- Previous close
- $16.60
- 52-week range
- $3.67 – $17.57
- Market cap
- $89M
- Institutional own.
- 99.9%
- Total held
- 100.0%
- Short interest
- 63K ▼ -63% vs prior · as of 2026-07-31
- Days to cover
- 2.1d
- Avg daily volume
- 112K
- Sector
- Health Care
- Industry
- Pharmaceutical Preparations
- Exchange
- XNAS
- 5m
- 0.8x
- 15m
- 0.4x
- 1h
- 0.4x
- 1D
- --
Get free RLYB + market alerts in your inbox
The top plays and unusual-volume catches our scanner flags, emailed to you. No account needed.
No spam. Unsubscribe anytime. Not investment advice.
Why is $RLYB up today?
Here is the latest on RLYB from our scanner (live price and day move above). We have not detected an unusual-volume catalyst for RLYB today, so it is trading in line with its recent range. The moment our scanner flags unusual activity, the reason will appear here.
Insiders
8 open-market buys0 buys, 0 sells last 3 months (9/1 over 12 months)Show 11 recent transactionsMinimize 11 recent transactions
| Insider | Action | Shares | % of position | Owns after | Value | Date |
|---|---|---|---|---|---|---|
Boudreau Helen M Director | Other | 4K 0.07% of company | added 100% | 7K | $8K at $2.38 | Jul 6, 26 |
Adar1 Capital Management, Llc Beneficial Owner (10%) | Bought (open market) | +10K 0.2% of company | added 1.1% | 926K | $141K at $13.80 | May 19, 26 |
Adar1 Capital Management, Llc Beneficial Owner (10%) | Bought (open market) | +6K 0.1% of company | added 0.7% | 916K | $84K at $13.98 | May 18, 26 |
Adar1 Capital Management, Llc Beneficial Owner (10%) | Bought (open market) | +300 | added <0.1% | 910K | $4K at $13.80 | May 15, 26 |
Adar1 Capital Management, Llc Beneficial Owner (10%) | Bought (open market) | +79K 1.5% of company | added 9.5% | 910K | $1.1M at $13.80 | May 13, 26 |
Adar1 Capital Management, Llc Beneficial Owner (10%) | Bought (open market) | +800 0.02% of company | added <0.1% | 831K | $11K at $13.83 | May 12, 26 |
Adar1 Capital Management, Llc Beneficial Owner (10%) | Bought (open market) | +50K 0.9% of company | added 6.4% | 830K | $700K at $14.00 | May 11, 26 |
Adar1 Capital Management, Llc Beneficial Owner (10%) | Bought (open market) | +35K 0.7% of company | added 4.7% | 780K | $491K at $14.00 | May 5, 26 |
Adar1 Capital Management, Llc Beneficial Owner (10%) | Bought (open market) | +121K 2.3% of company | added 19% | 745K | $1.7M at $13.90 | May 4, 26 |
Lieber Jonathan I Officer | Sold (automatic/other) | -789 0.01% of company | sold 16% | 4K | $4K at $5.06 | Feb 23, 26 |
Lieber Jonathan I Officer | Acquired (grant/award) | +3K 0.05% of company | added 100% | 5K | n/a | Feb 18, 26 |
Recent Form-4 filings via Nasdaq. Open-market buys are the signal worth watching. Grants and automatic (10b5-1) sells are routine. “% of position” is the share of that insider’s own holding the trade moved. Not investment advice.
Dilution watch
UnavailableWe could not reach SEC EDGAR, so the dilution check did not run for $RLYB. This is not a clean result: there may be an offering, a registration or a shelf on file that we were unable to read. Check it yourself on SEC EDGAR before trading it.
Stocks similar to RLYB
Comparable names in pharmaceutical preparations, closest in size first.
RLYB stock FAQ
Why is $RLYB up today?
Here is the latest on RLYB from our scanner (live price and day move above). We have not detected an unusual-volume catalyst for RLYB today, so it is trading in line with its recent range. The moment our scanner flags unusual activity, the reason will appear here.
What is the RLYB stock price today?
RLYB last traded at $16.83, up 1.39% on the day. The price and chart above update live during market hours (4 AM to 8 PM ET).
Where can I see live RLYB alerts?
The RLYB Live Alerts panel on this page streams real-time unusual volume (RVOL), momentum, halt and 200-EMA alerts from our scanner the moment they fire. Our scanner has flagged RLYB 0 times in the last 30 days.
What exchange is RLYB on?
RLYB (Rallybio Corporation Common Stock) trades on XNAS, with a market cap of about $89M in the PHARMACEUTICAL PREPARATIONS sector.
Is RLYB good for day trading?
That depends on your strategy and risk. Day traders look for volume, volatility and a clear trend. Use the live chart, RVOL alerts and 200-EMA context on this page to judge RLYB for yourself. This is not investment advice.
Live data from TheDesperateTrader scanner. Not investment advice.