CYTEK BIOSCIENCES INC (CTKB) Institutional Shareholders
CYTEK BIOSCIENCES INC (CTKB) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $360.33M in CTKB holdings during the latest filing period.
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 $49.90M, representing an estimated gain of +17.61% 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
149
Total Reported Value
$360.33M
Largest Holder
Blackrock, Inc.
Largest Position
$42.43M
Insider Transactions (90d)
25
Latest Filing Quarter
Q2 2026
New Institutional Positions
67
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 | $49,904,730 | +$7,471,342 | +17.61% | |
| Millennium Management Llc | 0.03% | 9,338,010 | $41,367,384 | $48,651,032 | +$7,283,648 | +17.61% | |
| Boston Partners | 0.03% | 7,660,943 | $33,942,877 | $39,913,513 | +$5,970,636 | +17.59% | |
| Hhlr Advisors, Ltd. | 3.54% | 6,657,030 | $29,490,643 | $34,683,126 | +$5,192,483 | +17.61% | |
| Topline Capital Management, Llc | 7.22% | 6,283,450 | $27,835,684 | $32,736,775 | +$4,901,091 | +17.61% | |
| Vanguard Capital Management Llc | 0.00% | 4,939,597 | $21,882,415 | $25,735,300 | +$3,852,885 | +17.61% | |
| Geode Capital Management, Llc | 0.00% | 3,059,573 | $13,557,155 | $15,940,375 | +$2,383,220 | +17.58% | |
| Dimensional Fund Advisors Lp | 0.00% | 2,616,257 | $11,589,081 | $13,630,699 | +$2,041,618 | +17.62% | |
| State Street Corp | 0.00% | 2,566,121 | $11,367,916 | $13,369,490 | +$2,001,574 | +17.61% | |
| Goldman Sachs Group Inc | 0.00% | 2,167,515 | $9,602,092 | $11,292,753 | +$1,690,661 | +17.61% | |
| Royce & Associates Lp | 0.07% | 2,081,579 | $9,221,395 | $10,845,027 | +$1,623,632 | +17.61% | |
| Russell Investments Group, Ltd. | 0.01% | 1,511,315 | $6,695,120 | $7,873,951 | +$1,178,831 | +17.61% | |
| Acadian Asset Management Llc | 0.01% | 1,376,048 | $6,089,000 | $7,169,210 | +$1,080,210 | +17.74% | |
| Bank Of America Corp | 0.00% | 1,315,332 | $5,826,921 | $6,852,880 | +$1,025,959 | +17.61% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,141,592 | $5,057,253 | $5,947,694 | +$890,441 | +17.61% | |
| Charles Schwab Investment Management Inc | 0.00% | 1,073,253 | $4,754,511 | $5,591,648 | +$837,137 | +17.61% | |
| Northern Trust Corp | 0.00% | 1,003,294 | $4,444,592 | $5,227,162 | +$782,570 | +17.61% | |
| Hrt Financial Lp | 0.01% | 997,769 | $4,420,000 | $5,198,376 | +$778,376 | +17.61% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 973,833 | $4,314,080 | $5,073,670 | +$759,590 | +17.61% | |
| Jane Street Group, Llc | 0.00% | 906,162 | $4,014,298 | $4,721,104 | +$706,806 | +17.61% | |
| Tudor Investment Corp Et Al | 0.02% | 837,913 | $3,711,955 | $4,365,527 | +$653,572 | +17.61% | |
| Aqr Capital Management Llc | 0.00% | 813,971 | $3,605,891 | $4,240,789 | +$634,898 | +17.61% | |
| Vanguard Fiduciary Trust Co | 0.00% | 740,662 | $3,281,133 | $3,858,849 | +$577,716 | +17.61% | |
| Citadel Advisors Llc | 0.00% | 721,470 | $3,196,112 | $3,758,859 | +$562,747 | +17.61% | |
| Morgan Stanley | 0.00% | 701,792 | $3,108,937 | $3,656,336 | +$547,399 | +17.61% | |
| Qube Research & Technologies Ltd | 0.00% | 689,821 | $3,055,907 | $3,593,967 | +$538,060 | +17.61% | |
| Susquehanna International Group, Llp | 0.00% | 681,705 | $3,019,953 | $3,551,683 | +$531,730 | +17.61% | |
| D. E. Shaw & Co., Inc. | 0.00% | 669,182 | $2,964,476 | $3,486,438 | +$521,962 | +17.61% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 661,300 | $2,929,559 | $3,445,373 | +$515,814 | +17.61% |
| Fmr Llc | 0.00% | 504,385 | $2,234,426 | $2,627,846 | +$393,420 | +17.61% | |
| Marshall Wace, Llp | 0.00% | 441,704 | $1,956,749 | $2,301,278 | +$344,529 | +17.61% | |
| Point72 Asset Management, L.P. | 0.00% | 422,361 | $1,871,059 | $2,200,501 | +$329,442 | +17.61% | |
| Jain Global Llc | 0.02% | 411,465 | $1,822,790 | $2,143,733 | +$320,943 | +17.61% | |
| Bank Of New York Mellon Corp | 0.00% | 371,427 | $1,645,422 | $1,935,135 | +$289,713 | +17.61% | |
| American Century Companies Inc | 0.00% | 292,103 | $1,294,016 | $1,521,857 | +$227,841 | +17.61% | |
| Nuveen, Llc | 0.00% | 289,415 | $1,282,109 | $1,507,852 | +$225,743 | +17.61% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 266,938 | $1,182,535 | $1,390,747 | +$208,212 | +17.61% | |
| Jacobs Levy Equity Management, Inc | 0.00% | 241,581 | $1,070,204 | $1,258,637 | +$188,433 | +17.61% | |
| Bnp Paribas Financial Markets | 0.00% | 215,010 | $952,494 | $1,120,202 | +$167,708 | +17.61% | |
| Y-Intercept (Hong Kong) Ltd | 0.02% | 193,128 | $855,557 | $1,006,197 | +$150,640 | +17.61% | |
| Invesco Ltd. | 0.00% | 185,671 | $822,522 | $967,346 | +$144,824 | +17.61% | |
| Two Sigma Investments, Lp | 0.00% | 168,218 | $745,206 | $876,416 | +$131,210 | +17.61% | |
| Gsa Capital Partners Llp | 0.05% | 167,593 | $742,000 | $873,160 | +$131,160 | +17.68% | |
| Numerai Gp Llc | 0.06% | 159,465 | $706,430 | $830,813 | +$124,383 | +17.61% | |
| Rhumbline Advisers | 0.00% | 153,225 | $678,777 | $798,302 | +$119,525 | +17.61% | |
| Centerbook Partners Lp | 0.03% | 149,180 | $660,867 | $777,228 | +$116,361 | +17.61% | |
| Jump Financial, Llc | 0.01% | 148,083 | $656,007 | $771,512 | +$115,505 | +17.61% | |
| Xtx Topco Ltd | 0.01% | 142,723 | $632,263 | $743,587 | +$111,324 | +17.61% | |
| Alliancebernstein L.P. | 0.00% | 141,048 | $616,380 | $734,860 | +$118,480 | +19.22% | |
| Jpmorgan Chase & Co | 0.00% | 141,864 | $615,690 | $739,111 | +$123,421 | +20.05% |
Frequently asked questions about CTKB
Who owns the most CTKB stock?
The largest holders of CTKB are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for CYTEK BIOSCIENCES INC (CTKB).
Is CTKB widely held by superinvestors?
Many widely followed stocks like CTKB appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly CTKB is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.