CYTEK BIOSCIENCES INC (CTKB) Institutional Ownership and Insiders Activity

CYTEK BIOSCIENCES INC (CTKB) is widely held by institutional investors, with 1 tracked firm reporting positions valued at approximately $2.96M based on SEC Form 13F filings for the quarter ended March 31, 2026.

Renaissance Technologies LLC is the largest disclosed holder, reporting approximately $2.96M in CTKB holdings in its latest filing.

Institutional ownership among tracked investors remains highly concentrated, with Renaissance Technologies LLC representing the majority of disclosed value.

Recent insider activity includes 45 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.