Cytek Biosciences, Inc. 13F holders
154 funds reported a position in Cytek Biosciences, Inc. in their 13F for the quarter ended 30 June 2026, together 81.5 million shares worth $361.0 million. Against the quarter before, 25 opened a position, 44 added, 65 trimmed and 38 sold out; together they sold a net 3.5 million shares. The largest holders: BlackRock, Inc., Millennium Management LLC and Boston Partners.
Funds holding154-11 on Q1 2026
Shares they held81.5Mworth $361.0 million
Net sold on the quarter3.5M sharesabout $15.5 million at the funds' values
Funds buying to selling69 to 103opened or added, to cut or sold
Opened 25Added 44Held 19Trimmed 65Sold out 38
What each fund did in CTKB against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in CTKB in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
3,241 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 23 reported a position in Cytek Biosciences, Inc.: 1 opened one, 5 added, 11 trimmed and 2 sold out, a net 196,117 shares sold.
| Fund | Change in shares | Shares now | Status | Filing |
|---|---|---|---|---|
| SJS Investment Consulting Inc. | +1,050 | 1,050 | new | 13F |
| ProShare Advisors LLC | -656 | 15,269 | trimmed | 13F |
| Caitong International Asset Management Co., Ltd | -556 | 2,766 | trimmed | 13F |
| IFP Advisors, Inc | -476 | 121 | trimmed | 13F |
| Farther Finance Advisors, LLC | +303 | 448 | added | 13F |
| Wealth Enhancement Advisory Services, LLC | +402 | 62,275 | added | 13F |
| NorthCrest Asset Manangement, LLC | -304 | 13,619 | trimmed | 13F |
| Nisa Investment Advisors, LLC | +250 | 808 | added | 13F |
| Gamma Investing LLC | +250 | 1,239 | added | 13F |
| Sterling Capital Management LLC | -90 | 2,361 | trimmed | 13F |
| Fortitude Family Office, LLC | -72 | 43 | trimmed | 13F |
| Versant Capital Management, Inc | -42 | 473 | trimmed | 13F |
| Salomon & Ludwin, LLC | -25 | 254 | trimmed | 13F |
| Essential Partners LLC | -16 | 1,515 | trimmed | 13F |
| True Wealth Design, LLC | +7 | 576 | added | 13F |
| Gilpin Wealth Management, LLC | -3 | 6 | trimmed | 13F |
| Davis Capital Management | -1 | 11 | trimmed | 13F |
| SBI Securities Co., Ltd. | -3,010 | 0 | sold out | 13F |
| Y-Intercept (Hong Kong) Ltd | -193,128 | 0 | sold out | 13F |
The largest moves in the name among the funds that have filed, against each fund's previous 13F.
The well-known funds
Of the 44 funds followed here, 7 reported a position in Cytek Biosciences, Inc. in a 13F for the quarter ended 30 June 2026. The largest: Millennium Management, 9.3 million shares worth $41.4 million, 0.0% of its reported book. New this quarter: Point72 Asset Management. In the quarter, 6 funds added or opened a position and 1 trimmed or sold out; together they bought a net 4.3 million shares, about $19.0 million at the funds' own value per share on 30 June 2026. A change under 0.1% of a holding counts as held.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Millennium Management | 9,338,010 | $41.4 million | 0.0% | +3,046,212 | added | 30 June 2026 | 13F |
| Geode Capital Management | 3,059,573 | $13.6 million | 0.0% | +225,618 | added | 30 June 2026 | 13F |
| Citadel Advisors | 721,470 | $3.2 million | 0.0% | +250,078 | added | 30 June 2026 | 13F |
| Renaissance Technologies | 661,300 | $2.9 million | 0.0% | -15,400 | trimmed | 30 June 2026 | 13F |
| FMR LLC | 504,385 | $2.2 million | 0.0% | +220,999 | added | 30 June 2026 | 13F |
| Point72 Asset Management | 422,361 | $1.9 million | 0.0% | +422,361 | new | 30 June 2026 | 13F |
| Two Sigma Investments | 168,218 | $745,206 | 0.0% | +142,618 | added | 30 June 2026 | 13F |
Value is what the fund reported.
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.The largest holders
| Fund | Shares | Share of all | Value | Of its book | Change in shares | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 9,578,643 | 11.75% | $42.4 million | 0.00% | -7,428,626 | 13F |
| Millennium Management LLC | 9,338,010 | 11.46% | $41.4 million | 0.03% | +3,046,212 | 13F |
| Boston Partners | 7,660,943 | 9.40% | $33.9 million | 0.03% | +1,858,170 | 13F |
| Hhlr Advisors, Ltd | 6,657,030 | 8.17% | $29.5 million | 3.54% | no change | 13F |
| Topline Capital Management, LLC | 6,283,450 | 7.71% | $27.8 million | 7.22% | -781,031 | 13F |
| Vanguard Capital Management LLC | 4,939,597 | 6.06% | $21.9 million | 0.00% | +176,693 | 13F |
| Geode Capital Management, LLC | 3,059,573 | 3.75% | $13.6 million | 0.00% | +225,618 | 13F |
| Dimensional Fund Advisors LP | 2,616,257 | 3.21% | $11.6 million | 0.00% | -47,072 | 13F |
| State Street Corp. | 2,566,121 | 3.15% | $11.4 million | 0.00% | -1,557,627 | 13F |
| Goldman Sachs Group Inc. | 2,167,515 | 2.66% | $9.6 million | 0.00% | -177,220 | 13F |
| Royce & Associates LP | 2,081,579 | 2.55% | $9.2 million | 0.07% | +439,211 | 13F |
| Russell Investments Group, Ltd. | 1,511,315 | 1.85% | $6.7 million | 0.01% | +151,415 | 13F |
| Acadian Asset Management LLC | 1,376,048 | 1.69% | $6.1 million | 0.01% | +977,060 | 13F |
| Bank of America Corp. | 1,315,332 | 1.61% | $5.8 million | 0.00% | +306,278 | 13F |
| Vanguard Portfolio Management LLC | 1,141,592 | 1.40% | $5.1 million | 0.00% | -1,170,266 | 13F |
| Charles Schwab Investment Management Inc. | 1,073,253 | 1.32% | $4.8 million | 0.00% | -31,348 | 13F |
| Northern Trust Corp. | 1,003,294 | 1.23% | $4.4 million | 0.00% | -1,899 | 13F |
| HRT Financial LP | 997,769 | 1.22% | $4.4 million | 0.01% | +583,717 | 13F |
| Arrowstreet Capital, Limited Partnership | 973,833 | 1.19% | $4.3 million | 0.00% | +653,924 | 13F |
| Jane Street Group, LLC | 906,162 | 1.11% | $4.0 million | 0.00% | new | 13F |
| Tudor Investment Corp. Et Al | 837,913 | 1.03% | $3.7 million | 0.01% | +517,198 | 13F |
| AQR Capital Management LLC | 813,971 | 1.00% | $3.6 million | 0.00% | -98,371 | 13F |
| Vanguard Fiduciary Trust Co. | 740,662 | 0.91% | $3.3 million | 0.00% | +23,651 | 13F |
| Citadel Advisors LLC | 721,470 | 0.89% | $3.2 million | 0.00% | +250,078 | 13F |
| Morgan Stanley | 701,792 | 0.86% | $3.1 million | 0.00% | -1,017,083 | 13F |
| Qube Research & Technologies Ltd | 689,821 | 0.85% | $3.1 million | 0.00% | new | 13F |
| Susquehanna International Group, LLP | 681,705 | 0.84% | $3.0 million | 0.00% | +625,695 | 13F |
| D. E. Shaw & Co., Inc. | 669,182 | 0.82% | $3.0 million | 0.00% | +409,057 | 13F |
| Renaissance Technologies LLC | 661,300 | 0.81% | $2.9 million | 0.00% | -15,400 | 13F |
| FMR LLC | 504,385 | 0.62% | $2.2 million | 0.00% | +220,999 | 13F |
| Marshall Wace, LLP | 441,704 | 0.54% | $2.0 million | 0.00% | new | 13F |
| Point72 Asset Management, L.P. | 422,361 | 0.52% | $1.9 million | 0.00% | new | 13F |
| Jain Global LLC | 411,465 | 0.50% | $1.8 million | 0.02% | new | 13F |
| Bank of New York Mellon Corp | 371,427 | 0.46% | $1.6 million | 0.00% | -237,220 | 13F |
| American Century Companies Inc. | 292,103 | 0.36% | $1.3 million | 0.00% | +10,422 | 13F |
| Nuveen, LLC | 289,415 | 0.36% | $1.3 million | 0.00% | +43,894 | 13F |
| Connor, Clark & Lunn Investment Management Ltd. | 266,938 | 0.33% | $1.2 million | 0.00% | +25,434 | 13F |
| Jacobs Levy Equity Management, Inc. | 241,581 | 0.30% | $1.1 million | 0.00% | -15,711 | 13F |
| BNP Paribas Financial Markets | 215,010 | 0.26% | $952,494 | 0.00% | +136,966 | 13F |
| Y-Intercept (Hong Kong) Ltd | 193,128 | 0.24% | $855,557 | 0.02% | new | 13F |
| Invesco Ltd. | 185,671 | 0.23% | $822,522 | 0.00% | -202,562 | 13F |
| Two Sigma Investments, LP | 168,218 | 0.21% | $745,206 | 0.00% | +142,618 | 13F |
| Gsa Capital Partners LLP | 167,593 | 0.21% | $742,000 | 0.05% | +58,477 | 13F |
| Numerai GP LLC | 159,465 | 0.20% | $706,430 | 0.06% | +47,005 | 13F |
| Franklin Resources Inc. | 156,061 | 0.19% | $691,350 | 0.00% | +42,088 | 13F |
| Rhumbline Advisers | 153,225 | 0.19% | $678,777 | 0.00% | -101,364 | 13F |
| CenterBook Partners LP | 149,180 | 0.18% | $660,867 | 0.03% | -580,694 | 13F |
| Jump Financial, LLC | 148,083 | 0.18% | $656,007 | 0.01% | +119,191 | 13F |
| XTX Topco Ltd | 142,723 | 0.18% | $632,263 | 0.01% | new | 13F |
| AllianceBernstein L.P. | 141,048 | 0.17% | $616,380 | 0.00% | no change | 13F |
The 50 largest of the 154 funds that reported a position in CTKB in their 13F for the quarter ended 30 June 2026, by the value each reported.
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Share of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 6 August 2026 | 13G/A | Integrated Core Strategies (US) LLC and 7 others | 9.3 million | 7.2% | 30 June 2026 | passive, under 20% (13d-1(c)) | EDGAR |
| 4 August 2026 | 13G | Boston Partners and 1 other | 7.6 million | 5.9% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 8 July 2026 | 13G/A | BlackRock, Inc. and 1 other | 9.4 million | 7.2% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 18 May 2026 | 13G/A | Integrated Core Strategies (US) LLC and 7 others | 7.9 million | 6.1% | 11 May 2026 | passive, under 20% (13d-1(c)) | EDGAR |
| 9 April 2026 | 13G | Millennium Management LLC and 5 others | 6.6 million | 5.2% | 2 April 2026 | passive, under 20% (13d-1(c)) | EDGAR |
| 26 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 17 November 2025 | 13G | Topline Capital Management, LLC and 5 others | 6.8 million | 5.3% | 25 September 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 12 November 2025 | 13G/A | Brown Capital Management, LLC and 1 other | 5.0 million | 3.9% | 30 September 2025 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13GFails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 21 September 2026 | 3 | $5.30 | SEC |
| 17 September 2026 | 2,293 | $4.93 | SEC |
| 16 September 2026 | 2,293 | $4.89 | SEC |
| 15 September 2026 | 2,293 | $4.83 | SEC |
| 10 September 2026 | 5,910 | $4.73 | SEC |
| 3 September 2026 | 48 | $4.69 | SEC |
| 2 September 2026 | 1,556 | $4.62 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.