CTKB Institutional Ownership & Shareholders
CYTEK BIOSCIENCES INC (CTKB) is currently held by 152 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $362.23M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of CTKB tracked by InsiderSet, reporting ownership valued at approximately $42.43M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $58.72M, representing an estimated gain of +38.37% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 67% of the total disclosed CTKB value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Millennium Management Llc, Boston Partners, and several other long-term asset managers with concentrated positions in CYTEK BIOSCIENCES INC (CTKB).
This page ranks the largest institutional CTKB shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
152
Total Reported Value
$362.23M
Largest Holder
Blackrock, Inc.
Largest Position
$42.43M
Insider Transactions (90d)
25
Latest Filing Quarter
Q2 2026
New Institutional Positions
47
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 9,578,643 | $42,433,388 | $58,717,082 | +$16,283,694 | +38.37% | |
| Millennium Management Llc | 0.03% | 9,338,010 | $41,367,384 | $57,242,001 | +$15,874,617 | +38.37% | |
| Boston Partners | 0.03% | 7,660,943 | $33,942,877 | $46,961,581 | +$13,018,704 | +38.35% | |
| Hhlr Advisors, Ltd. | 3.54% | 6,657,030 | $29,490,643 | $40,807,594 | +$11,316,951 | +38.37% | |
| Topline Capital Management, Llc | 7.22% | 6,283,450 | $27,835,684 | $38,517,549 | +$10,681,865 | +38.37% | |
| Vanguard Capital Management Llc | 0.00% | 4,939,597 | $21,882,415 | $30,279,730 | +$8,397,315 | +38.37% | |
| Geode Capital Management, Llc | 0.00% | 3,059,573 | $13,557,155 | $18,755,182 | +$5,198,027 | +38.34% | |
| Dimensional Fund Advisors Lp | 0.00% | 2,616,257 | $11,589,081 | $16,037,655 | +$4,448,574 | +38.39% | |
| State Street Corp | 0.00% | 2,566,121 | $11,367,916 | $15,730,322 | +$4,362,406 | +38.37% | |
| Goldman Sachs Group Inc | 0.00% | 2,167,515 | $9,602,092 | $13,286,867 | +$3,684,775 | +38.37% | |
| Royce & Associates Lp | 0.07% | 2,081,579 | $9,221,395 | $12,760,079 | +$3,538,684 | +38.37% | |
| Russell Investments Group, Ltd. | 0.01% | 1,511,315 | $6,695,120 | $9,264,361 | +$2,569,241 | +38.37% | |
| Acadian Asset Management Llc | 0.01% | 1,376,048 | $6,089,000 | $8,435,174 | +$2,346,174 | +38.53% | |
| Bank Of America Corp | 0.00% | 1,315,332 | $5,826,921 | $8,062,985 | +$2,236,064 | +38.37% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,141,592 | $5,057,253 | $6,997,959 | +$1,940,706 | +38.37% | |
| Charles Schwab Investment Management Inc | 0.00% | 1,073,253 | $4,754,511 | $6,579,041 | +$1,824,530 | +38.37% | |
| Northern Trust Corp | 0.00% | 1,003,294 | $4,444,592 | $6,150,192 | +$1,705,600 | +38.37% | |
| Hrt Financial Lp | 0.01% | 997,769 | $4,420,000 | $6,116,324 | +$1,696,324 | +38.38% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 973,833 | $4,314,080 | $5,969,596 | +$1,655,516 | +38.37% | |
| Jane Street Group, Llc | 0.00% | 906,162 | $4,014,298 | $5,554,773 | +$1,540,475 | +38.37% | |
| Tudor Investment Corp Et Al | 0.02% | 837,913 | $3,711,955 | $5,136,407 | +$1,424,452 | +38.37% | |
| Aqr Capital Management Llc | 0.00% | 813,971 | $3,605,891 | $4,989,642 | +$1,383,751 | +38.37% | |
| Vanguard Fiduciary Trust Co | 0.00% | 740,662 | $3,281,133 | $4,540,258 | +$1,259,125 | +38.37% | |
| Citadel Advisors Llc | 0.00% | 721,470 | $3,196,112 | $4,422,611 | +$1,226,499 | +38.37% | |
| Morgan Stanley | 0.00% | 701,792 | $3,108,937 | $4,301,985 | +$1,193,048 | +38.37% | |
| Qube Research & Technologies Ltd | 0.00% | 689,821 | $3,055,907 | $4,228,603 | +$1,172,696 | +38.37% | |
| Susquehanna International Group, Llp | 0.00% | 681,705 | $3,019,953 | $4,178,852 | +$1,158,899 | +38.37% | |
| D. E. Shaw & Co., Inc. | 0.00% | 669,182 | $2,964,476 | $4,102,086 | +$1,137,610 | +38.37% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 661,300 | $2,929,559 | $4,053,769 | +$1,124,210 | +38.37% |
| Fmr Llc | 0.00% | 504,385 | $2,234,426 | $3,091,880 | +$857,454 | +38.37% | |
| Marshall Wace, Llp | 0.00% | 441,704 | $1,956,749 | $2,707,646 | +$750,897 | +38.37% | |
| Point72 Asset Management, L.P. | 0.00% | 422,361 | $1,871,059 | $2,589,073 | +$718,014 | +38.37% | |
| Jain Global Llc | 0.02% | 411,465 | $1,822,790 | $2,522,280 | +$699,490 | +38.37% | |
| Mackenzie Financial Corp | 0.00% | 305,136 | $1,818,611 | $1,870,484 | +$51,873 | +2.85% | |
| Bank Of New York Mellon Corp | 0.00% | 371,427 | $1,645,422 | $2,276,848 | +$631,426 | +38.37% | |
| American Century Companies Inc | 0.00% | 292,103 | $1,294,016 | $1,790,591 | +$496,575 | +38.37% | |
| Nuveen, Llc | 0.00% | 289,415 | $1,282,109 | $1,774,114 | +$492,005 | +38.37% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 266,938 | $1,182,535 | $1,636,330 | +$453,795 | +38.37% | |
| Jacobs Levy Equity Management, Inc | 0.00% | 241,581 | $1,070,204 | $1,480,892 | +$410,688 | +38.37% | |
| Centerbook Partners Lp | 0.05% | 173,020 | $1,031,199 | $1,060,613 | +$29,414 | +2.85% | |
| Bnp Paribas Financial Markets | 0.00% | 215,010 | $952,494 | $1,318,011 | +$365,517 | +38.37% | |
| Invesco Ltd. | 0.00% | 185,671 | $822,522 | $1,138,163 | +$315,641 | +38.37% | |
| Two Sigma Investments, Lp | 0.00% | 168,218 | $745,206 | $1,031,176 | +$285,970 | +38.37% | |
| Gsa Capital Partners Llp | 0.05% | 167,593 | $742,000 | $1,027,345 | +$285,345 | +38.46% | |
| Numerai Gp Llc | 0.06% | 159,465 | $706,430 | $977,520 | +$271,090 | +38.37% | |
| Rhumbline Advisers | 0.00% | 153,225 | $678,777 | $939,269 | +$260,492 | +38.38% | |
| Jump Financial, Llc | 0.01% | 148,083 | $656,007 | $907,749 | +$251,742 | +38.37% | |
| Xtx Topco Ltd | 0.01% | 142,723 | $632,263 | $874,892 | +$242,629 | +38.37% | |
| Alliancebernstein L.P. | 0.00% | 141,048 | $616,380 | $864,624 | +$248,244 | +40.27% | |
| Jpmorgan Chase & Co | 0.00% | 141,864 | $615,690 | $869,626 | +$253,936 | +41.24% |
Frequently asked questions about CTKB
Who are the largest institutional holders of CTKB?
The largest institutional holders of CTKB reported in the latest SEC Form 13F filings include Blackrock, Inc., Millennium Management Llc, Boston Partners, Hhlr Advisors, Ltd., and Topline Capital Management, Llc. InsiderSet ranks institutional holders by their latest reported CTKB position.
What is CTKB institutional ownership?
This page tracks CTKB positions reported by institutional investment managers through SEC Form 13F. CYTEK BIOSCIENCES INC (CTKB) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own CTKB?
InsiderSet currently tracks 152 institutional managers reporting CTKB holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of CTKB shareholders.
How much CTKB stock do institutions own?
Institutional investment managers disclosed approximately $362.23M in CTKB holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was CTKB institutional ownership last updated?
The latest CTKB institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional CTKB holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its CTKB position after the reporting date.
Are institutions buying or selling CTKB?
Institutional buying and selling can be analyzed by comparing CTKB positions across consecutive 13F reporting periods. InsiderSet's CTKB Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View CTKB ownership changes.
How has CTKB institutional ownership changed over time?
InsiderSet tracks CTKB institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.