Cytek Biosciences, Inc.
CTKB • NASDAQ
Cytek Biosciences, Inc. is a medical - devices company in the healthcare sector on NASDAQ, led by Wenbin Jiang, Ph.D., with a market cap of $621.4M. As of Q3 2025, 63% of shares are held by 150 institutional investors, with BlackRock, Inc. as the largest holder at 13.01%.
President and Chief Executive OfficerWenbin Jiang, Ph.D.
Market Cap$621.4M
Medical - Devices
Healthcare
Employees637.0
Websitecytekbio.com
Country
United States of America
Overview
Overview of institutional ownership in CTKB as of Q3 2025 with a market cap of $441.5M
All Institutions
- Institutions
- 150
- Value Held
- $277.4M
- Shares Held
- 79.9M
- Avg Position
- $1.8M
- Median Position
- $177.5K
Hedge Funds
- Hedge Funds
- 19
- Value Held
- $51.5M
- Shares Held
- 14.8M
- Avg Position
- $2.7M
- Median Position
- $550.5K
Ownership Breakdown
Based on market cap of $441.5M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.
Biggest Investors
Institutions with the largest positions in CTKB as of Q3 2025
| Institution | Position Value |
|---|---|
B BlackRock, Inc. Institution | $57.4M 0.00% of portfolio |
 Topline Capital Management, LLC Hedge Fund•Long/Short | $24.1M 4.60% of portfolio |
 VANGUARD GROUP INC Institution | $24.1M 0.00% of portfolio |
H Hillhouse Capital Advisors, Ltd. Institution | $23.1M 0.62% of portfolio |
 BROWN CAPITAL MANAGEMENT LLC Long Only Manager | $17.2M 0.71% of portfolio |
 STATE STREET CORP Institution | $14.2M 0.00% of portfolio |
 MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy | $11.9M 0.01% of portfolio |
 DIMENSIONAL FUND ADVISORS LP Long Only Manager | $11.2M 0.00% of portfolio |
 GEODE CAPITAL MANAGEMENT LLC ETF Provider | $9.7M 0.00% of portfolio |
 WELLINGTON MANAGEMENT CO LLP Long Only Manager | $8.8M 0.00% of portfolio |
Net Capital Flow
Institutional buying and selling activity for CTKB in Q3 2025
- Traded
- +$2.4M
- Buyers
- 83
- Sellers
- 74
- Total Bought
- +$37.9M
- Total Sold
- −$35.6M
- Avg Position
- $1.6M
Biggest Buyers
| Institution | Net Bought |
|---|---|
WELLINGTON MANAGEMENT CO LLP Long Only Manager | +$8.8M +2.5M shares |
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy | +$8.7M +2.5M shares |
Topline Capital Management, LLC Hedge Fund•Long/Short | +$5.9M +1.7M shares |
 GOLDMAN SACHS GROUP INC Institution | +$2.5M +720.8K shares |
R ROYCE & ASSOCIATES LLC Institution | +$1.3M +373.5K shares |
 MORGAN STANLEY RIA/Wealth | +$1.1M +313.0K shares |
 ACADIAN ASSET MANAGEMENT LLC Long Only Manager | +$874.2K +251.9K shares |
 TUDOR INVESTMENT CORP ET AL Hedge Fund•Multi-Strategy | +$866.8K +249.8K shares |
 ARROWSTREET CAPITAL LIMITED PARTNERSHIP Hedge Fund•Quant | +$753.1K +217.0K shares |
 SCHWAB CHARLES INVESTMENT MANAGEMENT INC Long Only Manager | +$678.1K +195.4K shares |
Biggest Sellers
| Institution | Net Sold |
|---|---|
BROWN CAPITAL MANAGEMENT LLC Long Only Manager | −$7.5M −2.2M shares |
N NEW YORK STATE COMMON RETIREMENT FUND Institution | −$6.1M −1.8M shares |
VANGUARD GROUP INC Institution | −$2.9M −831.6K shares |
 CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy | −$1.9M −534.8K shares |
B BlackRock, Inc. Institution | −$1.7M −487.8K shares |
 ALGERT COLDIRON INVESTORS LLC Hedge Fund•Quant | −$1.3M −372.2K shares |
 Numerai GP LLC Hedge Fund•Quant | −$1.1M −315.8K shares |
 GLOBEFLEX CAPITAL L P Long Only Manager | −$987.7K −290.5K shares |
 UBS GLOBAL ASSET MANAGEMENT AMERICAS INC Long Only Manager | −$966.8K −284.4K shares |
 RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant | −$928.6K −267.6K shares |
Entry and Exit Activity
Institutions that initiated new positions or completely exited CTKB in Q3 2025
- New Positions
- 8
- New Value
- $291.8K
- Exited Positions
- 24
- Exited Value
- $6.0M
New Positions
| Institution | Position Value |
|---|---|
 Robeco Investment Management, Inc. Long Only Manager | $129.0K 37.2K shares |
T TWO SIGMA SECURITIES, LLC Institution | $81.1K 23.4K shares |
 MERCER GLOBAL ADVISORS INC /ADV RIA/Wealth | $75.4K 21.7K shares |
O Optiver Holding B.V. Institution | $3.6K 1.0K shares |
S Salomon & Ludwin, LLC Institution | $1.1K 279.0 shares |
P Prestige Wealth Management Group LLC RIA/Wealth | $833.0 240.0 shares |
 Rockefeller Capital Management L.P. Long Only Manager | $607.0 175.0 shares |
 Sunbelt Securities, Inc. RIA/Wealth | $42.0 12.0 shares |
Exited Positions
| Institution | Previous Position |
|---|---|
ALGERT COLDIRON INVESTORS LLC Hedge Fund•Quant | $1.3M 372.2K shares |
GLOBEFLEX CAPITAL L P Long Only Manager | $987.7K 290.5K shares |
UBS GLOBAL ASSET MANAGEMENT AMERICAS INC Long Only Manager | $966.8K 284.4K shares |
S Swiss National Bank Institution | $721.1K 212.1K shares |
T TEACHER RETIREMENT SYSTEM OF TEXAS Institution | $315.0K 92.6K shares |
 HENDERSON GROUP PLC Institution | $220.9K 64.9K shares |
H HRT FINANCIAL LLC Institution | $192.5K 56.6K shares |
E EntryPoint Capital, LLC Hedge Fund•Long/Short | $162.3K 47.7K shares |
T TEXAS PERMANENT SCHOOL FUND Institution | $160.1K 47.1K shares |
 Trexquant Investment LP Hedge Fund•Quant | $153.4K 45.1K shares |
Options Activity
Institutions with the largest Call and Put options positions in CTKB as of Q3 2025
- Call Positions
- 0
- Call Value
- -
- Put Positions
- 0
- Put Value
- -
Call Positions
| Institution | Position Value |
|---|---|
| No call positions found | |
Put Positions
| Institution | Position Value |
|---|---|
| No put positions found | |
Most Committed Institutions
Institutions with CTKB as the highest % of their portfolio as of Q3 2025
| Institution | Portfolio Weight |
|---|---|
Topline Capital Management, LLC Hedge Fund•Long/Short | 4.60% $24.1M |
BROWN CAPITAL MANAGEMENT LLC Long Only Manager | 0.71% $17.2M |
H Hillhouse Capital Advisors, Ltd. Institution | 0.62% $23.1M |
R ROYCE & ASSOCIATES LLC Institution | 0.06% $6.1M |
Numerai GP LLC Hedge Fund•Quant | 0.05% $369.5K |
O OXFORD ASSET MANAGEMENT Institution | 0.05% $130.2K |
 GSA CAPITAL PARTNERS LLP Hedge Fund•Quant | 0.03% $378.6K |
D Dynamic Technology Lab Private Ltd Institution | 0.02% $121.9K |
 PDT Partners, LLC Hedge Fund•Quant | 0.02% $318.8K |
X XTX Topco Ltd Institution | 0.01% $251.7K |
Hedge Fund Spotlight
Discover hedge funds investing in CTKB
TWO SIGMA ADVISERS, LLC
Hedge Fund • Multi-Strategy
Portfolio ManagerScott David Hoffman
- Portfolio Value
- $50.0B
- Positions
- 2,312
- Last Reported
- Q3 2025
Sector Allocation
Position in Cytek Biosciences, Inc.
- Market Value
- $213.8K
- Shares Held
- 61.6K
- Portfolio Weight
- 0.00%
- Owned Since
- 2025-Q3
| Top Holding | Sector | Market Value | Weight |
|---|---|---|---|
Semiconductors Technology | $1.5B | 3.07% | |
Software - Infrastructure Technology | $1.5B | 3.03% | |
Consumer Electronics Technology | $1.4B | 2.79% |
