Rallybio (RLYB) Stock Analysis & Price (Updated Oct 16, 2026, 4:00 PM ET)
Updated Oct 16, 2026, 4:00 PM ET
RLYB dips 3.0% to $16.28, a 1-month low on 3.2x normal volume. Closed at $16.28, -2.95% vs the prior close of $16.77. Day range $16.20–$16.69, opened at $16.69.
RLYB daily analysis — what happened
A plain-English, data-only note written after every US trading day. Newest first; older days stay archived below.
Oct 16, 2026 — RLYB dips 3.0% to $16.28, a 1-month low on 3.2x normal volume
- Closed at $16.28, -2.95% vs the prior close of $16.77. Day range $16.20–$16.69, opened at $16.69.
- Volume was 37.14K shares, 3.2x its 50-day average of 11.51K — unusually heavy trading.
- Price is -3.4% vs its 50-day average ($16.85) and +31.3% vs its 200-day average ($12.40).
- 52-week range $3.67–$17.57; today's close sits at 91% of that range, 7.4% below the 52-week high.
Oct 15, 2026 — RLYB dips 0.8% to $16.77
- Closed at $16.77, -0.77% vs the prior close of $16.91. Day range $16.62–$16.88, opened at $16.88.
- Volume was 3.20K shares, 0.3x its 50-day average of 12.13K — lighter than usual.
- Price is -0.4% vs its 50-day average ($16.84) and +35.8% vs its 200-day average ($12.35).
- 52-week range $3.67–$17.57; today's close sits at 94% of that range, 4.5% below the 52-week high.
Oct 14, 2026 — RLYB rises 1.1% to $16.91
- Closed at $16.91, +1.11% vs the prior close of $16.72. Day range $16.74–$16.91, opened at $16.79.
- Volume was 5.30K shares, 0.4x its 50-day average of 12.92K — lighter than usual.
- Price is +0.4% vs its 50-day average ($16.83) and +37.5% vs its 200-day average ($12.29).
- 52-week range $3.67–$17.57; today's close sits at 95% of that range, 3.8% below the 52-week high.
Oct 13, 2026 — RLYB dips 0.4% to $16.72
- Closed at $16.72, -0.42% vs the prior close of $16.79. Day range $16.69–$16.91, opened at $16.72.
- Volume was 5.20K shares, 0.4x its 50-day average of 13.21K — lighter than usual.
- Price is -0.5% vs its 50-day average ($16.81) and +36.6% vs its 200-day average ($12.24).
- 52-week range $3.67–$17.57; today's close sits at 94% of that range, 4.9% below the 52-week high.
Oct 12, 2026 — RLYB dips 1.4% to $16.79
- Closed at $16.79, -1.35% vs the prior close of $17.02. Day range $16.75–$17.08, opened at $16.88.
- Volume was 6.00K shares, 0.4x its 50-day average of 13.45K — lighter than usual.
- Price is -0.0% vs its 50-day average ($16.80) and +37.8% vs its 200-day average ($12.18).
- 52-week range $3.67–$17.57; today's close sits at 94% of that range, 4.5% below the 52-week high.
Oct 9, 2026 — RLYB ends flat (+0.2%) to $17.02
- Closed at $17.02, +0.18% vs the prior close of $16.99. Day range $16.95–$17.22, opened at $17.05.
- Volume was 6.90K shares, 0.5x its 50-day average of 13.55K — lighter than usual.
- Price is +1.4% vs its 50-day average ($16.78) and +40.3% vs its 200-day average ($12.13).
- 52-week range $3.67–$17.57; today's close sits at 96% of that range, 3.2% below the 52-week high.
Oct 8, 2026 — RLYB rises 0.4% to $16.99
- Closed at $16.99, +0.35% vs the prior close of $16.93. Day range $16.75–$17.04, opened at $16.75.
- Volume was 7.90K shares, 0.6x its 50-day average of 13.72K — lighter than usual.
- Price is +1.4% vs its 50-day average ($16.76) and +40.7% vs its 200-day average ($12.07).
- 52-week range $3.67–$17.57; today's close sits at 96% of that range, 3.3% below the 52-week high.
Oct 7, 2026 — RLYB dips 0.9% to $16.93
- Closed at $16.93, -0.88% vs the prior close of $17.08. Day range $16.80–$17.04, opened at $16.91.
- Volume was 7.50K shares, 0.5x its 50-day average of 14.08K — lighter than usual.
- Price is +1.1% vs its 50-day average ($16.74) and +40.8% vs its 200-day average ($12.02).
- 52-week range $3.67–$17.57; today's close sits at 95% of that range, 3.7% below the 52-week high.
Oct 6, 2026 — RLYB rises 1.1% to $17.08
- Closed at $17.08, +1.07% vs the prior close of $16.90. Day range $16.80–$17.08, opened at $16.87.
- Volume was 1.90K shares, 0.1x its 50-day average of 14.36K — lighter than usual.
- Price is +2.1% vs its 50-day average ($16.72) and +42.7% vs its 200-day average ($11.97).
- 52-week range $3.67–$17.57; today's close sits at 96% of that range, 2.8% below the 52-week high.
Oct 5, 2026 — RLYB dips 1.1% to $16.90
- Closed at $16.90, -1.05% vs the prior close of $17.08. Day range $16.82–$17.12, opened at $16.99.
- Volume was 4.60K shares, 0.3x its 50-day average of 15.10K — lighter than usual.
- Price is +1.1% vs its 50-day average ($16.71) and +41.9% vs its 200-day average ($11.91).
- 52-week range $3.67–$17.57; today's close sits at 95% of that range, 3.8% below the 52-week high.
Oct 2, 2026 — RLYB rises 1.9% to $17.08
- Closed at $17.08, +1.91% vs the prior close of $16.76. Day range $16.69–$17.22, opened at $16.69.
- Volume was 7.90K shares, 0.5x its 50-day average of 15.56K — lighter than usual.
- Price is +2.3% vs its 50-day average ($16.70) and +44.1% vs its 200-day average ($11.86).
- 52-week range $3.67–$17.57; today's close sits at 96% of that range, 2.8% below the 52-week high.
RLYB latest news & SEC filings
Every SEC filing by or about RLYB in the last 120 days, explained in plain English. Updated daily, with a same-day refresh for new filings.
Oct 15, 2026 · Form EFFECT — EFFECT filing
EFFECT filing
Oct 15, 2026 · Form 424B3 — Prospectus / supplement for an offering or resale
Prospectus / supplement for an offering or resale
An offering document: new shares or debt may be sold, which can increase the share count (dilution) or debt load. Size and terms are in the prospectus.
Oct 14, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Hopfner Robert Lorne converted options/RSUs into 9,196 shares at $7.60 (≈$69.89K) on Oct 12, 2026; now holds 9,196
- Hopfner Robert Lorne converted options/RSUs into 3,562 shares at $2.38 (≈$8.48K) on Oct 12, 2026; now holds 12,758
- Hopfner Robert Lorne converted options/RSUs into 2,062 shares at $15.28 (≈$31.51K) on Oct 12, 2026; now holds 14,820
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Oct 13, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Lieber Jonathan I converted options/RSUs into 3,910 shares at $6.08 (≈$23.77K) on Oct 9, 2026; now holds 13,650
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Oct 8, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Uden Stephen converted options/RSUs into 22,456 shares at $6.08 (≈$136.53K) on Oct 6, 2026; now holds 115,620
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Oct 1, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Lieber Jonathan I converted options/RSUs into 5,000 shares at $6.08 (≈$30.40K) on Sep 29, 2026; now holds 9,740
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Sep 28, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Liu Hui converted options/RSUs into 3,562 shares at $2.38 (≈$8.48K) on Sep 24, 2026; now holds 3,562
- Liu Hui converted options/RSUs into 8,482 shares at $7.60 (≈$64.46K) on Sep 24, 2026; now holds 12,044
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Sep 18, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Chung Wendy converted options/RSUs into 3,562 shares at $2.38 (≈$8.48K) on Sep 16, 2026; now holds 3,562
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Sep 9, 2026 · Form 8-K — Major event / current report
Current report — a filing companies must make within 4 business days of a major event
- Item 5.02 — Change in directors or officers (appointment, departure or pay).
Aug 14, 2026 · Form SCHEDULE 13G/A — Update to a passive 5%+ stake (13G)
Update to a passive 5%+ stake (13G)
Filed by an outside investor (not the company). It reports a holding of more than 5% of a share class; percentage and holder name are in the filing.
Aug 14, 2026 · Form SCHEDULE 13G/A — Update to a passive 5%+ stake (13G)
Update to a passive 5%+ stake (13G)
Filed by an outside investor (not the company). It reports a holding of more than 5% of a share class; percentage and holder name are in the filing.
Things to know before you trade RLYB
- Last results release: Nov 6, 2025 (8-K Item 2.02). Previous ones: Aug 7, 2025, May 8, 2025, Mar 13, 2025. Based on that rhythm, the next report is likely around Feb 5, 2026 — an estimate, not a confirmed date.
- How much it moves: over the last 20 sessions the average daily move was 1.09% (largest 3.0%).
- Liquidity: about 8.70K shares (≈$141.67K) trade per day on average. Thin volume can mean wider bid/ask spreads.
- 52-week position: $16.28 vs a range of $3.67–$17.57 (91% of the range).
- Dividends: no cash dividends in the last 2 years.
- Splits: 1:8 on Feb 6, 2026
- Insider trades (Form 4, last 12 months, recent 25 shown): 25 open-market buys, 0 sales; latest: Capital Management, Llc Adar1 bought 10,000 shares on May 19, 2026.
- Latest filings: 8-K Sep 9, 2026; 10-Q Aug 6, 2026; 8-K Jun 1, 2026.
- Share count: 5.31M shares outstanding (Jul 30, 2026), -87.3% vs a year earlier — the company has been reducing its share count.
- Listing: Nasdaq · industry: Pharmaceutical Preparations.
RLYB market data (last 20 sessions)
| Date | Open | High | Low | Close | Volume |
|---|---|---|---|---|---|
| Oct 16, 2026 | 16.69 | 16.69 | 16.20 | 16.28 | 37.14K |
| Oct 15, 2026 | 16.88 | 16.88 | 16.62 | 16.77 | 3.20K |
| Oct 14, 2026 | 16.79 | 16.91 | 16.74 | 16.91 | 5.30K |
| Oct 13, 2026 | 16.72 | 16.91 | 16.69 | 16.72 | 5.20K |
| Oct 12, 2026 | 16.88 | 17.08 | 16.75 | 16.79 | 6.00K |
| Oct 9, 2026 | 17.05 | 17.22 | 16.95 | 17.02 | 6.90K |
| Oct 8, 2026 | 16.75 | 17.04 | 16.75 | 16.99 | 7.90K |
| Oct 7, 2026 | 16.91 | 17.04 | 16.80 | 16.93 | 7.50K |
| Oct 6, 2026 | 16.87 | 17.08 | 16.80 | 17.08 | 1.90K |
| Oct 5, 2026 | 16.99 | 17.12 | 16.82 | 16.90 | 4.60K |
| Oct 2, 2026 | 16.69 | 17.22 | 16.69 | 17.08 | 7.90K |
| Oct 1, 2026 | 17.16 | 17.16 | 16.76 | 16.76 | 7.10K |
| Sep 30, 2026 | 17.24 | 17.24 | 16.92 | 17.20 | 6.00K |
| Sep 29, 2026 | 16.90 | 17.24 | 16.61 | 17.22 | 16.70K |
| Sep 28, 2026 | 16.55 | 17.05 | 16.55 | 17.05 | 16.10K |
| Sep 25, 2026 | 16.80 | 17.07 | 16.62 | 16.62 | 7.00K |
| Sep 24, 2026 | 16.74 | 16.75 | 16.61 | 16.61 | 6.80K |
| Sep 23, 2026 | 16.66 | 16.86 | 16.61 | 16.86 | 5.30K |
| Sep 22, 2026 | 16.85 | 17.11 | 16.72 | 16.92 | 7.60K |
| Sep 21, 2026 | 17.14 | 17.14 | 16.61 | 16.93 | 7.90K |
About Rallybio
Rallybio (RLYB) is listed on the Nasdaq and classified by the SEC under “Pharmaceutical Preparations”. Its business address is in NEW HAVEN, CT. State of incorporation: DE. Fiscal year ends December 31. SEC CIK 1739410.
RLYB board of directors & executives
From SEC Form 3/4/5 insider filings made in the last 12 months (date = latest filing).
Directors
| Name | Role | Latest filing |
|---|---|---|
| Helen M Boudreau | Director | Jul 10, 2026 |
| Wendy Chung | Director | Sep 18, 2026 |
| Ronald Hunt | Director | Feb 20, 2026 |
| Hui Liu | Director | Sep 28, 2026 |
| Martin Mackay | Director | Feb 20, 2026 |
Executive officers
| Name | Title | Latest filing |
|---|---|---|
| Jonathan I Lieber | Chief Financial Officer | Feb 23, 2026 |
Recent insider buys & sales
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| May 19, 2026 | Capital Management, Llc Adar1 | Buy | 10,000 | $13.98 |
| May 19, 2026 | Capital Management, Llc Adar1 | Buy | 200 | $13.80 |
| May 19, 2026 | Capital Management, Llc Adar1 | Buy | 10,000 | $13.98 |
| May 19, 2026 | Capital Management, Llc Adar1 | Buy | 200 | $13.80 |
| May 19, 2026 | Daniel Schneeberger | Buy | 10,000 | $13.98 |
| May 19, 2026 | Daniel Schneeberger | Buy | 200 | $13.80 |
| May 19, 2026 | Daniel Schneeberger | Buy | 10,000 | $13.98 |
| May 19, 2026 | Daniel Schneeberger | Buy | 200 | $13.80 |
| May 19, 2026 | Capital Management, Llc Adar1 | Buy | 10,000 | $13.98 |
| May 19, 2026 | Capital Management, Llc Adar1 | Buy | 200 | $13.80 |
| May 19, 2026 | Capital Management, Llc Adar1 | Buy | 10,000 | $13.98 |
| May 19, 2026 | Capital Management, Llc Adar1 | Buy | 200 | $13.80 |
| May 19, 2026 | Daniel Schneeberger | Buy | 10,000 | $13.98 |
| May 19, 2026 | Daniel Schneeberger | Buy | 200 | $13.80 |
| May 19, 2026 | Daniel Schneeberger | Buy | 10,000 | $13.98 |
RLYB financials (annual, from XBRL filings)
| Fiscal year end | Revenue | Net income | Diluted EPS | Operating cash flow |
|---|---|---|---|---|
| Dec 31, 2025 | $858.00K | $-8.98M | -1.59 | $-29.81M |
| Dec 31, 2024 | $636.00K | $-57.77M | -10.61 | $-49.28M |
| Dec 31, 2023 | — | $-74.56M | -1.84 | $-60.27M |
| Dec 31, 2022 | — | $-66.65M | -2.09 | $-57.28M |
| Dec 31, 2021 | — | $-47.01M | -1.84 | $-45.53M |
Latest balance sheet: total assets $98.06M, total liabilities $3.57M, cash $92.85M (as of Jun 30, 2026).
RLYB earnings / results-day log
| Date | Filing | Close that day |
|---|---|---|
| Nov 6, 2025 | 8-K Item 2.02 (results) | $5.11 |
| Aug 7, 2025 | 8-K Item 2.02 (results) | $4.09 |
| May 8, 2025 | 8-K Item 2.02 (results) | $2.34 |
| Mar 13, 2025 | 8-K Item 2.02 (results) | $5.25 |
| Nov 7, 2024 | 8-K Item 2.02 (results) | $7.92 |
| Aug 8, 2024 | 8-K Item 2.02 (results) | — |
| May 9, 2024 | 8-K Item 2.02 (results) | — |
| Mar 12, 2024 | 8-K Item 2.02 (results) | — |
| Feb 6, 2024 | 8-K Item 2.02 (results) | — |
| Nov 9, 2023 | 8-K Item 2.02 (results) | — |
| Aug 8, 2023 | 8-K Item 2.02 (results) | — |
| May 9, 2023 | 8-K Item 2.02 (results) | — |
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Information only, not investment advice. BuyMeWhiskey is not a registered investment adviser or broker-dealer; nothing here is a recommendation to buy, sell or hold any security, and there are no price targets. Data comes from SEC EDGAR filings and public end-of-day market data and may be delayed or contain errors. Verify with the company's filings before making decisions. Prices: end-of-day data as of Oct 16, 2026, 4:00 PM ET. Filings: SEC EDGAR. Updated after every US trading day.