Cytek Biosciences (CTKB) Stock: Why It's Down Today
Updated Oct 19, 2026, 12:05 PM ET · intraday price
- Trading at $5.23 as of 12:05 PM ET, -0.38% vs the prior close of $5.25.
- Volume 174.53K shares, 0.1x its 50-day average (light).
- No new SEC filings since the prior session.
- No new insider buys or sales reported since the prior session.
CTKB dips 0.4% to $5.23, a 1-month low. Trading at $5.23 (intraday, 12:05 PM ET), -0.38% vs the prior close of $5.25. Day range $5.19–$5.34, opened at $5.27.
CTKB daily analysis — what happened
A plain-English, data-only note for every US trading day (today's note updates every 2 hours while the market is open). Newest first; older days stay archived below.
Oct 19, 2026 — CTKB dips 0.4% to $5.23, a 1-month low
- Trading at $5.23 (intraday, 12:05 PM ET), -0.38% vs the prior close of $5.25. Day range $5.19–$5.34, opened at $5.27.
- Volume was 174.53K shares, 0.1x its 50-day average of 1.22M — lighter than usual.
- Price is +2.9% vs its 50-day average ($5.08) and +12.8% vs its 200-day average ($4.64).
- 52-week range $3.31–$6.21; the current price sits at 66% of that range, 15.8% below the 52-week high.
Oct 16, 2026 — CTKB dips 3.0% to $5.25
- Closed at $5.25, -2.96% vs the prior close of $5.41. Day range $5.20–$5.41, opened at $5.35.
- Volume was 1.05M shares, 0.8x its 50-day average of 1.23M.
- Price is +3.7% vs its 50-day average ($5.06) and +13.2% vs its 200-day average ($4.64).
- 52-week range $3.31–$6.21; today's close sits at 67% of that range, 15.5% below the 52-week high.
Oct 15, 2026 — CTKB ends flat (+0.3%) to $5.41, 3 up days in a row
- Closed at $5.41, +0.28% vs the prior close of $5.39. Day range $5.29–$5.48, opened at $5.36.
- Volume was 905.40K shares, 0.7x its 50-day average of 1.23M.
- Price is +7.3% vs its 50-day average ($5.04) and +16.7% vs its 200-day average ($4.63).
- 52-week range $3.31–$6.21; today's close sits at 72% of that range, 12.9% below the 52-week high.
- That makes 3 straight gains.
Oct 14, 2026 — CTKB rises 0.8% to $5.39
- Closed at $5.39, +0.84% vs the prior close of $5.35. Day range $5.23–$5.47, opened at $5.25.
- Volume was 1.07M shares, 0.9x its 50-day average of 1.23M.
- Price is +7.6% vs its 50-day average ($5.02) and +16.4% vs its 200-day average ($4.63).
- 52-week range $3.31–$6.21; today's close sits at 72% of that range, 13.1% below the 52-week high.
Oct 13, 2026 — CTKB rises 0.8% to $5.35
- Closed at $5.35, +0.75% vs the prior close of $5.31. Day range $5.18–$5.47, opened at $5.19.
- Volume was 1.43M shares, 1.2x its 50-day average of 1.22M.
- Price is +7.2% vs its 50-day average ($4.99) and +15.5% vs its 200-day average ($4.63).
- 52-week range $3.31–$6.21; today's close sits at 70% of that range, 13.8% below the 52-week high.
Oct 12, 2026 — CTKB dips 2.2% to $5.31
- Closed at $5.31, -2.21% vs the prior close of $5.43. Day range $5.11–$5.42, opened at $5.42.
- Volume was 1.04M shares, 0.9x its 50-day average of 1.21M.
- Price is +6.8% vs its 50-day average ($4.97) and +14.7% vs its 200-day average ($4.63).
- 52-week range $3.31–$6.21; today's close sits at 69% of that range, 14.5% below the 52-week high.
Oct 9, 2026 — CTKB rises 1.3% to $5.43 on 3.4x normal volume
- Closed at $5.43, +1.31% vs the prior close of $5.36. Day range $5.30–$5.55, opened at $5.32.
- Volume was 3.88M shares, 3.4x its 50-day average of 1.14M — unusually heavy trading.
- Price is +9.7% vs its 50-day average ($4.95) and +17.3% vs its 200-day average ($4.63).
- 52-week range $3.31–$6.21; today's close sits at 73% of that range, 12.6% below the 52-week high.
Oct 8, 2026 — CTKB rises 0.4% to $5.36
- Closed at $5.36, +0.37% vs the prior close of $5.34. Day range $5.05–$5.38, opened at $5.26.
- Volume was 1.71M shares, 1.5x its 50-day average of 1.12M.
- Price is +8.8% vs its 50-day average ($4.93) and +15.8% vs its 200-day average ($4.63).
- 52-week range $3.31–$6.21; today's close sits at 71% of that range, 13.7% below the 52-week high.
Oct 7, 2026 — CTKB dips 0.7% to $5.34
- Closed at $5.34, -0.74% vs the prior close of $5.38. Day range $5.11–$5.34, opened at $5.21.
- Volume was 1.78M shares, 1.6x its 50-day average of 1.10M.
- Price is +8.8% vs its 50-day average ($4.91) and +15.5% vs its 200-day average ($4.63).
- 52-week range $3.31–$6.21; today's close sits at 70% of that range, 14.0% below the 52-week high.
Oct 6, 2026 — CTKB slides 11.7% to $5.38 on 1.9x normal volume
- Closed at $5.38, -11.66% vs the prior close of $6.09. Day range $5.36–$6.21, opened at $6.13.
- Volume was 2.05M shares, 1.9x its 50-day average of 1.07M — unusually heavy trading.
- Price is +10.0% vs its 50-day average ($4.89) and +16.4% vs its 200-day average ($4.62).
- 52-week range $3.31–$6.21; today's close sits at 71% of that range, 13.4% below the 52-week high.
Oct 5, 2026 — CTKB jumps 3.7% to $6.09, a 52-week high
- Closed at $6.09, +3.75% vs the prior close of $5.87. Day range $5.82–$6.11, opened at $5.88.
- Volume was 1.79M shares, 1.7x its 50-day average of 1.04M.
- Price is +25.0% vs its 50-day average ($4.87) and +31.8% vs its 200-day average ($4.62).
- 52-week range $3.31–$6.18; today's close sits at 97% of that range, 1.5% below the 52-week high.
Oct 2, 2026 — CTKB rises 1.0% to $5.87
- Closed at $5.87, +1.03% vs the prior close of $5.81. Day range $5.75–$5.94, opened at $5.86.
- Volume was 1.10M shares, 1.1x its 50-day average of 1.04M.
- Price is +21.3% vs its 50-day average ($4.84) and +27.3% vs its 200-day average ($4.61).
- 52-week range $3.31–$6.18; today's close sits at 89% of that range, 5.0% below the 52-week high.
CTKB bull case vs bear case (from the data)
- Price is +2.9% vs its 50-day average — short-term trend is up.
- Price is +12.8% vs its 200-day average — above the long-term trend line.
- Annual revenue grew 0.5% in the latest fiscal year (SEC XBRL).
- Latest fiscal-year net income: loss of $66.54M.
CTKB latest news & SEC filings
Every SEC filing by or about CTKB in the last 120 days, explained in plain English. Updated daily, with a same-day refresh for new filings.
Sep 29, 2026 · Form 8-K — Major event / current report
Current report — a filing companies must make within 4 business days of a major event
- Item 5.03 — Amended its charter or bylaws / changed fiscal year.
Sep 2, 2026 · Form 144 — Planned insider sale
Notice of proposed sale (Form 144) — an insider or affiliate plans to sell restricted or control shares
A notice of intent, not a completed sale. Any actual sale by a director or officer shows up later on Form 4.
Aug 24, 2026 · Form 8-K — Major event / current report
Current report — a filing companies must make within 4 business days of a major event
- Item 7.01 — Released information under Regulation FD (e.g. a presentation or press release).
- Item 8.01 — Reported other events the company considers important.
Aug 20, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
Insider holdings update with no common-stock transactions in the table (often options or derivative awards only).
Aug 20, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
Insider holdings update with no common-stock transactions in the table (often options or derivative awards only).
Aug 20, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
Insider holdings update with no common-stock transactions in the table (often options or derivative awards only).
Aug 20, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
Insider holdings update with no common-stock transactions in the table (often options or derivative awards only).
Aug 20, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
Insider holdings update with no common-stock transactions in the table (often options or derivative awards only).
Aug 6, 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 5, 2026 · Form 10-Q — Quarterly report
Quarterly report (unaudited financial statements for the quarter)
Quarter ended Jun 30, 2026:
- Revenue: $48.14M (prior year $45.60M) (+5.6% vs Jun 30, 2025)
- Net income: -$12.16M (prior year -$5.58M) (loss widened vs Jun 30, 2025)
Aug 5, 2026 · Form 8-K — Major event / current report
Current report — a filing companies must make within 4 business days of a major event
- Item 2.02 — Reported results of operations (earnings release).
This is a results-day filing: the earnings press release is attached as an exhibit.
Aug 4, 2026 · Form SCHEDULE 13G — Passive stake (13G)
Passive stake (13G) — an investor reported owning more than 5%
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.
Jul 15, 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).
Jul 8, 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.
Jun 25, 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).
Things to know before you trade CTKB
- Last results release: Aug 5, 2026 (8-K Item 2.02). Previous ones: May 7, 2026, Feb 26, 2026, Jan 13, 2026. Based on that rhythm, the next report is likely around Nov 4, 2026 — an estimate, not a confirmed date.
- How much it moves: over the last 20 sessions the average daily move was 2.26% (largest 11.7%).
- Liquidity: about 1.55M shares (≈$8.10M) trade per day on average.
- 52-week position: $5.23 vs a range of $3.31–$6.21 (66% of the range).
- Dividends: no cash dividends in the last 2 years.
- Splits: none in the last 2 years.
- Insider trades (Form 4, last 12 months, recent 25 shown): 0 open-market buys, 0 sales.
- Latest filings: 8-K Sep 29, 2026; 8-K Aug 24, 2026; 10-Q Aug 5, 2026.
- Share count: 129.98M shares outstanding (Jul 31, 2026), +2.2% vs a year earlier.
- Listing: Nasdaq · industry: Laboratory Analytical Instruments.
CTKB market data (last 20 sessions)
| Date | Open | High | Low | Close | Volume |
|---|---|---|---|---|---|
| Oct 19, 2026 | 5.27 | 5.34 | 5.19 | 5.23 | 174.53K |
| Oct 16, 2026 | 5.41 | 5.41 | 5.20 | 5.25 | 1.05M |
| Oct 15, 2026 | 5.36 | 5.48 | 5.29 | 5.41 | 905.40K |
| Oct 14, 2026 | 5.25 | 5.47 | 5.23 | 5.39 | 1.07M |
| Oct 13, 2026 | 5.19 | 5.47 | 5.18 | 5.35 | 1.43M |
| Oct 12, 2026 | 5.42 | 5.42 | 5.11 | 5.31 | 1.04M |
| Oct 9, 2026 | 5.32 | 5.55 | 5.30 | 5.43 | 3.88M |
| Oct 8, 2026 | 5.26 | 5.38 | 5.05 | 5.36 | 1.71M |
| Oct 7, 2026 | 5.21 | 5.34 | 5.11 | 5.34 | 1.78M |
| Oct 6, 2026 | 6.13 | 6.21 | 5.36 | 5.38 | 2.05M |
| Oct 5, 2026 | 5.88 | 6.11 | 5.82 | 6.09 | 1.79M |
| Oct 2, 2026 | 5.86 | 5.94 | 5.75 | 5.87 | 1.10M |
| Oct 1, 2026 | 5.96 | 5.97 | 5.75 | 5.81 | 1.57M |
| Sep 30, 2026 | 5.76 | 5.99 | 5.67 | 5.96 | 1.32M |
| Sep 29, 2026 | 5.74 | 5.86 | 5.66 | 5.76 | 870.00K |
| Sep 28, 2026 | 5.62 | 5.78 | 5.53 | 5.74 | 1.09M |
| Sep 25, 2026 | 5.71 | 5.75 | 5.57 | 5.65 | 1.49M |
| Sep 24, 2026 | 5.64 | 5.83 | 5.48 | 5.73 | 1.60M |
| Sep 23, 2026 | 5.73 | 5.85 | 5.63 | 5.68 | 1.26M |
| Sep 22, 2026 | 5.29 | 5.84 | 5.26 | 5.71 | 3.78M |
About Cytek Biosciences
Cytek Biosciences (CTKB) is listed on the Nasdaq and classified by the SEC under “Laboratory Analytical Instruments”. Its business address is in FREMONT, CA. State of incorporation: DE. Fiscal year ends December 31. SEC CIK 1831915.
CTKB 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 |
|---|---|---|
| Jack Ball | Director | Jun 12, 2026 |
| Richard Chin | Director | Aug 20, 2026 |
| Michael Holder | Director | Aug 20, 2026 |
| Vera Imper | Director | Jun 12, 2026 |
| Wenbin Jiang | PRESIDENT AND CEO | Aug 20, 2026 |
| Glenn P Muir | Director | Aug 20, 2026 |
| Deborah J Neff | Director | Jun 12, 2026 |
| Ming Yan | CHIEF TECHNOLOGY OFFICER | Aug 20, 2026 |
Executive officers
| Name | Title | Latest filing |
|---|---|---|
| Valerie Barnett | CHIEF LEGAL OFFICER | May 20, 2026 |
| Philippe Busque | SVP, GLOBAL SALES AND SERVICES | May 20, 2026 |
| Ilan Feuchtwang | Chief Legal Officer, Secretary | Aug 12, 2026 |
| Wenbin Jiang | PRESIDENT AND CEO | Aug 20, 2026 |
| William D. Mccombe | Chief Financial Officer | Aug 20, 2026 |
| Ming Yan | CHIEF TECHNOLOGY OFFICER | Aug 20, 2026 |
Recent insider buys & sales
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| No open-market insider buys or sales reported in the last 12 months. | ||||
CTKB financials (annual, from XBRL filings)
| Fiscal year end | Revenue | Net income | Diluted EPS | Operating cash flow |
|---|---|---|---|---|
| Dec 31, 2025 | $201.49M | $-66.54M | — | $-4.69M |
| Dec 31, 2024 | $200.45M | $-6.02M | — | $25.38M |
| Dec 31, 2023 | $193.01M | $-12.15M | -0.09 | $5.28M |
| Dec 31, 2022 | $164.04M | $2.48M | 0.02 | $-12.23M |
| Dec 31, 2021 | $127.95M | $3.03M | 0.00 | $4.63M |
Latest balance sheet: total assets $446.93M, total liabilities $124.98M, cash $73.85M (as of Jun 30, 2026).
CTKB earnings / results-day log
| Date | Filing | Close that day |
|---|---|---|
| Aug 5, 2026 | 8-K Item 2.02 (results) | $4.18 |
| May 7, 2026 | 8-K Item 2.02 (results) | $4.92 |
| Feb 26, 2026 | 8-K Item 2.02 (results) | $4.40 |
| Jan 13, 2026 | 8-K Item 2.02 (results) | $5.70 |
| Nov 5, 2025 | 8-K Item 2.02 (results) | $4.01 |
| Aug 6, 2025 | 8-K Item 2.02 (results) | $3.89 |
| May 8, 2025 | 8-K Item 2.02 (results) | $3.79 |
| Feb 27, 2025 | 8-K Item 2.02 (results) | $4.81 |
| Jan 15, 2025 | 8-K Item 2.02 (results) | $5.68 |
| Nov 5, 2024 | 8-K Item 2.02 (results) | $5.44 |
| Aug 6, 2024 | 8-K Item 2.02 (results) | — |
| May 8, 2024 | 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: intraday data as of Oct 19, 2026, 12:05 PM ET. Filings: SEC EDGAR. Refreshed every 2 hours during US market hours.