CTKB — Cytek Biosciences, Inc.
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2021-07-23.
Performance
Technicals
Others in Healthcare
Measured signals that fired on CTKB
| date | signal | measured base rate |
|---|---|---|
| 2026-05-05 | Equal highs taken out structure | -0.70% over 21 days · t = -8.28 · n = 68,636 statistically distinguishable from its control group |
| 2026-03-11 | Equal lows taken out structure | -0.64% over 21 days · t = -4.75 · n = 55,661 statistically distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-08-18 | Jiang Wenbin PRESIDENT AND CEO | Shares withheld for tax | 21.0K | 4.67 | 97.9K |
| 2026-08-18 | Jiang Wenbin PRESIDENT AND CEO | Shares withheld for tax | 7.1K | 4.67 | 33.0K |
| 2026-08-18 | McCombe William D. Chief Financial Officer | Shares withheld for tax | 5.4K | 4.67 | 25.2K |
| 2026-08-18 | Jiang Wenbin PRESIDENT AND CEO | Shares withheld for tax | 5.4K | 4.67 | 25.1K |
| 2026-08-18 | McCombe William D. Chief Financial Officer | Shares withheld for tax | 4.4K | 4.67 | 20.5K |
| 2026-08-18 | Yan Ming CHIEF TECHNOLOGY OFFICER | Shares withheld for tax | 3.5K | 4.67 | 16.2K |
| 2026-08-18 | Jiang Wenbin PRESIDENT AND CEO | Shares withheld for tax | 2.9K | 4.67 | 13.4K |
| 2026-08-18 | McCombe William D. Chief Financial Officer | Shares withheld for tax | 2.1K | 4.67 | 9.9K |
| 2026-08-18 | Yan Ming CHIEF TECHNOLOGY OFFICER | Shares withheld for tax | 1.8K | 4.67 | 8.3K |
| 2026-08-18 | Yan Ming CHIEF TECHNOLOGY OFFICER | Shares withheld for tax | 1.5K | 4.67 | 7.0K |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| BlackRock, Inc. | 74.3M | 17.0M |
| Topline Capital Management, LLC | 30.9M | 7.1M |
| HHLR ADVISORS, LTD. | 29.1M | 6.7M |
| MILLENNIUM MANAGEMENT LLC | 27.5M | 6.3M |
| Boston Partners | 25.4M | 5.8M |
| VANGUARD CAPITAL MANAGEMENT LLC | 20.8M | 4.8M |
| STATE STREET CORP | 18.0M | 4.1M |
| GEODE CAPITAL MANAGEMENT, LLC | 12.4M | 2.8M |
| DIMENSIONAL FUND ADVISORS LP | 11.6M | 2.7M |
| GOLDMAN SACHS GROUP INC | 10.2M | 2.3M |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Latest SEC filings
| form | filed | period | |
|---|---|---|---|
| 4 | 2026-08-20 | 2026-08-18 | on EDGAR ↗ |
| 4 | 2026-08-20 | 2026-08-18 | on EDGAR ↗ |
| 4 | 2026-08-20 | 2026-08-18 | on EDGAR ↗ |
| 4 | 2026-08-20 | 2026-08-18 | on EDGAR ↗ |
| 4 | 2026-08-20 | 2026-08-18 | on EDGAR ↗ |
| 4 | 2026-08-20 | 2026-08-18 | on EDGAR ↗ |
| 4 | 2026-08-12 | 2026-08-10 | on EDGAR ↗ |
| SCHEDULE 13G/A | 2026-08-06 | — | on EDGAR ↗ |
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
Recent headlines
- Cytek Biosciences, Inc. (CTKB) filed form 4 · 2026-08-20 · SEC EDGAR
- Cytek Biosciences, Inc. (CTKB) filed form 4 · 2026-08-20 · SEC EDGAR
- Cytek Biosciences, Inc. (CTKB) filed form 4 · 2026-08-20 · SEC EDGAR
- Cytek Biosciences, Inc. (CTKB) filed form 4 · 2026-08-20 · SEC EDGAR
- Cytek Biosciences, Inc. (CTKB) filed form 4 · 2026-08-20 · SEC EDGAR
- Cytek Biosciences, Inc. (CTKB) filed form 4 · 2026-08-20 · SEC EDGAR
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