Cytek Biosciences, Inc. (CTKB)
Nasdaq: CTKB · Laboratory Analytical Instruments · Fremont, CA · filing with the SEC since 2020
Grade5.8
◀ Past 7.4● Present 5.8▶ Future 4.1
Who owns Cytek Biosciences, Inc.
As filed with the SECHolders of 5% or more
4
Millennium Management LLC holds 7.2% of Common Stock, par value $0.001 per share, as its SCHEDULE 13G/A filed Aug 6, 2026 says.
Directors and officers
12
report now, of 25 people on the record since 2021. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 4 named at left.
Holders of 5% or moreshare of the class, as filed
Millennium Management LLC
SCHEDULE 13G/A · filed Aug 6, 2026 · Common Stock, par value $0.001 per share · 6.1% in May 18, 2026
Blackrock, Inc.
SCHEDULE 13G/A · filed Jul 8, 2026 · Common Stock · 13.1% in Jul 18, 2025
Boston Partners
SCHEDULE 13G · filed Aug 4, 2026 · Common Stock
Topline Capital Management, LLC
SCHEDULE 13G · filed Nov 17, 2025 · Common Stock - $0.001 par value
Brown Capital Management, LLC
SCHEDULE 13G/A · filed Nov 12, 2025 · Common Stock, $0.001 Par Value Per Share · reported falling below 5%, from 5.89% in May 15, 2025
The Vanguard Group
SCHEDULE 13G/A · filed Mar 26, 2026 · Common Stock · reported falling below 5%, from 6.13% in Jul 29, 2025
RA Capital Management, L.P.
SCHEDULE 13G/A · filed Feb 14, 2025 · Common Stock, par value $0.001 per share · reported falling below 5%
What CTKB reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Fci
A company bought · acquisition · Feb 2023 · owns, named in the 10-K filed Feb 26, 2026
10 subsidiaries in 8 countries, from the list filed with the 10-K filed Feb 26, 2026.
Insider tradesForm 4
0sales
0purchases
0sales on a scheduled plan
0people selling
$0sold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Nov 12, 2025 to Nov 12, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2025 runs to Nov 12, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window
No one on the roster filed an open-market trade in the window.