NASDAQ:CTKB

Cytek Biosciences Stock Insider Trading

Healthcare > Medical - Devices

Buy CTKB

*Your capital is at risk

$4.22

-0.0900 (-2.09%)

At Close: Jul 31, 2026

Cytek Biosciences Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be positive at 91.67. In total, the insiders bought 1.55M and sold 1.38M CTKB shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	91.67
● Buy	1.55M shares
● Sell	1.38M shares
76% Buy Activity Weak Negative Correlation
Sell Signal Low Confidence Mar 13, 2026 Analysis Breakdown: Signal is highly questionable due to a strongly contradictory positive Insider Power Score of 91.67. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
May 18, 2026 Buy	Common Stock M-Exempt	Mccombe William D. Chief Financial Officer	C-Suite Officer	10 699 Value: $38.0K
May 18, 2026 Buy	Restricted Stock Units M-Exempt	Barnett Valerie Chief Legal Officer	Officer	5 156 Value: $18.3K
May 18, 2026 Sell	Common Stock F-InKind	Barnett Valerie Chief Legal Officer	Officer	881 Value: $3K
May 18, 2026 Buy	Common Stock M-Exempt	Barnett Valerie Chief Legal Officer	Officer	2 454 Value: $9K
May 18, 2026 Buy	Common Stock M-Exempt	Barnett Valerie Chief Legal Officer	Officer	5 156 Value: $18.3K
May 18, 2026 Buy	Common Stock M-Exempt	Barnett Valerie Chief Legal Officer	Officer	7 250 Value: $25.7K
May 18, 2026 Sell	Common Stock F-InKind	Yan Ming Chief Technology Officer	Officer	919 Value: $3K
May 18, 2026 Buy	Common Stock M-Exempt	Yan Ming Chief Technology Officer	Officer	3 683 Value: $13.1K
May 18, 2026 Sell	Common Stock F-InKind	Yan Ming Chief Technology Officer	Officer	1 025 Value: $4K
May 18, 2026 Buy	Common Stock M-Exempt	Yan Ming Chief Technology Officer	Officer	4 108 Value: $14.6K
May 18, 2026 Sell	Common Stock F-InKind	Yan Ming Chief Technology Officer	Officer	2 364 Value: $8K
May 18, 2026 Buy	Common Stock M-Exempt	Yan Ming Chief Technology Officer	Officer	9 480 Value: $33.7K
May 18, 2026 Buy	Common Stock M-Exempt	Chin Richard Director	Director	6 107 Value: $21.7K
May 18, 2026 Buy	Restricted Stock Units M-Exempt	Chin Richard Director	Director	6 107 Value: $21.7K
May 18, 2026 Buy	Restricted Stock Units M-Exempt	Holder Michael Director	Director	1 454 Value: $5K
May 18, 2026 Buy	Common Stock M-Exempt	Holder Michael Director	Director	1 454 Value: $5K
May 18, 2026 Buy	Common Stock M-Exempt	Mccombe William D. Chief Financial Officer	C-Suite Officer	8 700 Value: $30.9K
May 18, 2026 Sell	Common Stock F-InKind	Mccombe William D. Chief Financial Officer	C-Suite Officer	3 122 Value: $11.1K
May 18, 2026 Buy	Common Stock M-Exempt	Mccombe William D. Chief Financial Officer	C-Suite Officer	6 320 Value: $22.4K
May 18, 2026 Sell	Common Stock F-InKind	Mccombe William D. Chief Financial Officer	C-Suite Officer	2 268 Value: $8K
May 18, 2026 Buy	Restricted Stock Units M-Exempt	Mccombe William D. Chief Financial Officer	C-Suite Officer	6 320 Value: $22.4K
May 18, 2026 Buy	Restricted Stock Units M-Exempt	Barnett Valerie Chief Legal Officer	Officer	9 435 Value: $33.5K
May 18, 2026 Buy	Common Stock M-Exempt	Barnett Valerie Chief Legal Officer	Officer	9 435 Value: $33.5K
May 18, 2026 Sell	Common Stock F-InKind	Barnett Valerie Chief Legal Officer	Officer	3 386 Value: $12.0K
May 18, 2026 Sell	Common Stock F-InKind	Barnett Valerie Chief Legal Officer	Officer	2 602 Value: $9K

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT CYTEK BIOSCIENCES, INC.

Cytek Biosciences, Inc., a cell analysis solutions company, provides cell analysis tools that facilitates scientific advances in biomedical research and clinical applications. It offers aurora and northern lights systems, which are spectrum flow cytometers that delivers cell analysis by utilizing the fluorescence signatures from multiple lasers to distinguish fluorescent tags on single cells; and aurora cell sorter system, which leverages full sp...

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