CYTEK BIOSCIENCES INC (CTKB) Top 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 March 31, 2026. The institutional investors covered on this page collectively reported approximately $364.60M 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 $74.32M in its March 31, 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 $67.69M, representing an estimated loss of -8.92% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 71% of the total disclosed CTKB value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Topline Capital Management, Llc, Hhlr Advisors, Ltd., 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
162
Total Reported Value
$364.60M
Largest Holder
Blackrock, Inc.
Largest Position
$74.32M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
175
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% | 17,007,269 | $74,321,765 | $67,688,931 | -$6,632,834 | -8.92% | |
| Topline Capital Management, Llc | 5.10% | 7,064,481 | $30,871,782 | $28,116,634 | -$2,755,148 | -8.92% | |
| Hhlr Advisors, Ltd. | 1.74% | 6,657,030 | $29,091,221 | $26,494,979 | -$2,596,242 | -8.92% | |
| Millennium Management Llc | 0.02% | 6,291,798 | $27,495,157 | $25,041,356 | -$2,453,801 | -8.92% | |
| Boston Partners | 0.03% | 5,802,773 | $25,361,674 | $23,095,037 | -$2,266,637 | -8.94% | |
| Vanguard Capital Management Llc | 0.00% | 4,762,904 | $20,813,890 | $18,956,358 | -$1,857,532 | -8.92% | |
| State Street Corp | 0.00% | 4,123,748 | $18,020,779 | $16,412,517 | -$1,608,262 | -8.92% | |
| Geode Capital Management, Llc | 0.00% | 2,833,955 | $12,387,379 | $11,279,141 | -$1,108,238 | -8.95% | |
| Dimensional Fund Advisors Lp | 0.00% | 2,663,329 | $11,638,019 | $10,600,049 | -$1,037,970 | -8.92% | |
| Goldman Sachs Group Inc | 0.00% | 2,344,735 | $10,246,491 | $9,332,045 | -$914,446 | -8.92% | |
| Vanguard Portfolio Management Llc | 0.00% | 2,311,858 | $10,102,819 | $9,201,195 | -$901,624 | -8.92% | |
| Morgan Stanley | 0.00% | 1,718,875 | $7,511,483 | $6,841,123 | -$670,361 | -8.92% | |
| Royce & Associates Lp | 0.07% | 1,642,368 | $7,177,148 | $6,536,625 | -$640,523 | -8.92% | |
| Brown Capital Management Llc | 0.92% | 1,480,506 | $6,469,811 | $5,892,414 | -$577,397 | -8.92% | |
| Russell Investments Group, Ltd. | 0.01% | 1,359,900 | $5,942,759 | $5,412,402 | -$530,357 | -8.92% | |
| Charles Schwab Investment Management Inc | 0.00% | 1,104,601 | $4,827,106 | $4,396,312 | -$430,794 | -8.92% | |
| Bank Of America Corp | 0.00% | 1,009,054 | $4,409,567 | $4,016,035 | -$393,532 | -8.92% | |
| Northern Trust Corp | 0.00% | 1,005,193 | $4,392,693 | $4,000,668 | -$392,025 | -8.92% | |
| Aqr Capital Management Llc | 0.00% | 912,342 | $3,986,935 | $3,631,121 | -$355,814 | -8.92% | |
| Simcoe Capital Llc | 3.54% | 882,113 | $3,854,834 | $3,510,810 | -$344,024 | -8.92% | |
| Centerbook Partners Lp | 0.17% | 729,874 | $3,189,549 | $2,904,899 | -$284,650 | -8.92% | |
| Vanguard Fiduciary Trust Co | 0.00% | 717,011 | $3,133,338 | $2,853,704 | -$279,634 | -8.92% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 676,700 | $2,957,179 | $2,693,266 | -$263,913 | -8.92% |
| Bank Of New York Mellon Corp | 0.00% | 608,647 | $2,659,788 | $2,422,415 | -$237,373 | -8.92% | |
| Principal Financial Group Inc | 0.00% | 534,759 | $2,336,897 | $2,128,341 | -$208,556 | -8.92% | |
| Citadel Advisors Llc | 0.00% | 471,392 | $2,059,983 | $1,876,140 | -$183,843 | -8.92% | |
| Public Sector Pension Investment Board | 0.01% | 394,718 | $1,724,918 | $1,570,978 | -$153,940 | -8.92% | |
| Invesco Ltd. | 0.00% | 388,233 | $1,696,578 | $1,545,167 | -$151,411 | -8.92% | |
| Tudor Investment Corp Et Al | 0.01% | 320,715 | $1,401,525 | $1,276,446 | -$125,079 | -8.92% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 319,909 | $1,398,002 | $1,273,238 | -$124,764 | -8.92% | |
| Fmr Llc | 0.00% | 283,386 | $1,238,397 | $1,127,876 | -$110,521 | -8.92% | |
| American Century Companies Inc | 0.00% | 281,681 | $1,230,946 | $1,121,090 | -$109,856 | -8.92% | |
| D. E. Shaw & Co., Inc. | 0.00% | 260,125 | $1,136,746 | $1,035,298 | -$101,449 | -8.92% | |
| Jacobs Levy Equity Management, Inc | 0.00% | 257,292 | $1,124,366 | $1,024,022 | -$100,344 | -8.92% | |
| Rhumbline Advisers | 0.00% | 254,589 | $1,112,539 | $1,013,264 | -$99,275 | -8.92% | |
| Nuveen, Llc | 0.00% | 245,521 | $1,072,926 | $977,174 | -$95,752 | -8.92% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 241,504 | $1,055,372 | $961,186 | -$94,186 | -8.92% | |
| Ameriprise Financial Inc | 0.00% | 187,270 | $818,370 | $745,335 | -$73,035 | -8.92% | |
| Ubs Group Ag | 0.00% | 186,881 | $816,670 | $743,786 | -$72,884 | -8.92% | |
| Legal & General Group Plc | 0.00% | 182,860 | $799,098 | $727,783 | -$71,315 | -8.92% | |
| Alliancebernstein L.P. | 0.00% | 141,048 | $712,292 | $561,371 | -$150,921 | -21.19% | |
| Ieq Capital, Llc | 0.00% | 144,392 | $630,993 | $574,680 | -$56,313 | -8.92% | |
| Voya Investment Management Llc | 0.00% | 141,385 | $617,852 | $562,712 | -$55,140 | -8.92% | |
| Prudential Financial Inc | 0.00% | 117,597 | $513,899 | $468,036 | -$45,863 | -8.92% | |
| Franklin Resources Inc | 0.00% | 113,973 | $498,062 | $453,613 | -$44,449 | -8.92% | |
| Numerai Gp Llc | 0.05% | 112,460 | $491,450 | $447,591 | -$43,859 | -8.92% | |
| Deutsche Bank Ag\ | 0.00% | 104,437 | $456,390 | $415,659 | -$40,731 | -8.92% | |
| State Of Wisconsin Investment Board | 0.00% | 104,046 | $454,681 | $414,103 | -$40,578 | -8.92% | |
| Creative Planning | 0.00% | 89,937 | $393,025 | $357,949 | -$35,076 | -8.92% | |
| Pdt Partners, Llc | 0.02% | 86,869 | $379,618 | $345,739 | -$33,879 | -8.92% |
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.