RA Capital Nexus Fund II, L.P. bought $3.0M of CTKB

bought $2.96m of CTKB

241,727 shares @ $12.27

Increased holdings by +1.80%

35th largest trade (out of 122)

Large TradeCluster Buy

Trade made by a director

Part of a cluster of 25 transactions by 5 insiders

Unscheduled trade

9% win rate · -19.5% median edge vs SPY (23 trades, 90-day)

Price 38% below 200-day moving average

CTKBCytek Biosciences, Inc.

HealthcareMedical Devices

1D0.00%

1W+2.46%

1M+6.00%

3M—

6M—

1Y—

Recent insider activity at CTKB