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CTKB · Cytek Biosciences, Inc.

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$4.81 +0.15 (+3.22%) At close · Aug 21
Market Cap
$625.22M
Shares
129.98M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 154
Total Value: $361,123,977
Total Shares: 81,518,580

Institutional Ownership Trend

20 quarters

Holder Concentration

Across 154 13F filers · Δ vs Mar 31, 2026
Top Holder
11.8%
Sep 2023 → Jun 2026 · range 11.8% – 24.7%
−8.2 pts
Top 5
48.5%
Sep 2023 → Jun 2026 · range 48.5% – 70.8%
−1.9 pts
Top 10
67.3%
Sep 2023 → Jun 2026 · range 67.3% – 85.1%
−2.7 pts
HHI
596
Sep 2023 → Jun 2026 · range 596 – 1,185
Broadly held−151

Quarterly Activity

vs Mar 31, 2026
New
29
Increased
45
Decreased
64
Sold Out
40
Unchanged
16
Holder count: -11
Institutional value: -2.9%
Shares held: -4.2%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 154
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1831915 CUSIP 23285D109 13F (30d) 142 filings 139 filers Visit website Investor relations