CTKB

Cytek Biosciences Inc$4.64 0.22%
Health CareUSCUSIP 23285D109· EOD Jul 16, 2026◍ Confluence graph
Tracked 13F Holders
129
+6 QoQ
13F Value (tracked)
$346.1M
Insider Net · 180d
$0
0↑ 0↓
Recent Filings
15
Smart-money sentimentMixed
BearishBullish
13F funds (latest Q)19 adding · 18 trimming
Insider net (180d)$0

Price & smart-money activity

$4.64 0.22%5Y -75.3%
$0.63$7.66$14.70$21.73$28.76202120222023202420252026213946920198201115132312162013201812151522952418261430202925322931302830322826
Hover for who · click for detailEnd-of-day closing prices52w $3.10 – $5.88

Top institutional holders

129 tracked 13F filers
#FundPosition valueSharesLast moveAs ofHistory
1BlackRock, Inc.
$74.3M
17.0M
−1.0%
Reduced · −166K sh
Q1 2026
2Topline Capital Management, LLC
$30.9M
7.1M
−5.1%
Reduced · −378K sh
Q1 2026
3HHLR ADVISORS, LTD.
$29.1M
6.7M
Held
Q1 2026
4MILLENNIUM MANAGEMENT LLC
$27.5M
6.3M
+32%
Added · +1.5M sh
Q1 2026
5Boston Partners
$25.4M
5.8M
+16%
Added · +794K sh
Q1 2026
6VANGUARD CAPITAL MANAGEMENT LLC
$20.8M
4.8M
New
+4.8M sh
Q1 2026
7STATE STREET CORP
$18.0M
4.1M
−0.6%
Reduced · −23K sh
Q1 2026
8GEODE CAPITAL MANAGEMENT, LLC
$12.4M
2.8M
+1.6%
Added · +43K sh
Q1 2026
9DIMENSIONAL FUND ADVISORS LP
$11.6M
2.7M
+0.6%
Added · +16K sh
Q1 2026
10GOLDMAN SACHS GROUP INC
$10.2M
2.3M
+31%
Added · +555K sh
Q1 2026
11VANGUARD PORTFOLIO MANAGEMENT LLC
$10.1M
2.3M
New
+2.3M sh
Q1 2026
12MORGAN STANLEY
$7.5M
1.7M
+1.1%
Added · +18K sh
Q1 2026
13Russell Investments Group, Ltd.
$5.9M
1.4M
+36%
Added · +359K sh
Q1 2026
14CHARLES SCHWAB INVESTMENT MANAGEMENT INC
$4.8M
1.1M
+0.9%
Added · +10K sh
Q1 2026
15BANK OF AMERICA CORP /DE/
$4.4M
1.0M
+18%
Added · +153K sh
Q1 2026
16NORTHERN TRUST CORP
$4.4M
1.0M
+5.0%
Added · +48K sh
Q1 2026
17AQR CAPITAL MANAGEMENT LLC
$4.0M
912K
+23%
Added · +169K sh
Q1 2026
18CenterBook Partners LP
$3.2M
730K
New
+730K sh
Q1 2026
19VANGUARD FIDUCIARY TRUST CO
$3.1M
717K
New
+717K sh
Q1 2026
20RENAISSANCE TECHNOLOGIES LLC
$3.0M
677K
+0.3%
Added · +2K sh
Q1 2026
21Bank of New York Mellon Corp
$2.7M
609K
−4.6%
Reduced · −29K sh
Q1 2026
22PRINCIPAL FINANCIAL GROUP INC
$2.3M
535K
−20%
Reduced · −132K sh
Q1 2026
23CITADEL ADVISORS LLC
$2.1M
471K
+183%
Added · +305K sh
Q1 2026
24PUBLIC SECTOR PENSION INVESTMENT BOARD
$1.7M
395K
+4.1%
Added · +15K sh
Q1 2026
25TUDOR INVESTMENT CORP ET AL
$1.4M
321K
New
+321K sh
Q1 2026

Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

Fund activity: latest quarter

Opened (NEW)
6
funds
Added
13
funds
Reduced
18
funds
Exited
0
funds

Funds that own CTKB also own

CompanyCo-held byCombined value
NVIDIA CORPNVDA42 funds$26.4B
MICROSOFT CORPMSFT42 funds$17.8B
AMAZON.COM INCAMZN42 funds$13.8B
ALPHABET INC-CL AGOOGL42 funds$11.2B
BROADCOM INCAVGO42 funds$9.4B
META PLATFORMS INC-CLASS AMETA42 funds$8.5B
ELI LILLY & COLLY42 funds$4.5B
MICRON TECHNOLOGY INCMU42 funds$4.0B
BANK OF AMERICA CORPBAC42 funds$2.1B
LAM RESEARCH CORPLRCX42 funds$2.1B
INTEL CORPINTC42 funds$1.3B
SCHWAB (CHARLES) CORPSCHW42 funds$1.2B

Ranked by how many of CTKB's institutional holders also hold each name, a cross-fund conviction signal.

Insider activity (Form 4)

Full insider page →
Buys · 180d
$0
0 insiders
Sells · 180d
$0
0 insiders
Net
$0
0 P/S txns
Signal
Mixed
open-market
DateInsiderRoleActionSharesValue
Jun 2, 2025McCombe William D.Chief Financial OfficerBuy (P)35K$97K
Apr 19, 2024Yan MingCHIEF TECHNOLOGY OFFICER, DirectorSell (S)20K$117K
Apr 9, 2024Yan MingCHIEF TECHNOLOGY OFFICER, DirectorSell (S)400$3K
Apr 9, 2024Yan MingCHIEF TECHNOLOGY OFFICER, DirectorSell (S)2K$11K
Mar 19, 2024Yan MingCHIEF TECHNOLOGY OFFICER, DirectorSell (S)20K$134K
Mar 18, 2024Yan MingCHIEF TECHNOLOGY OFFICER, DirectorSell (S)20K$135K
Dec 26, 2023Jeanmonod PatrikChief Financial OfficerSell (S)3K$29K
Dec 19, 2023Yan MingChief Technology Officer, DirectorSell (S)20K$189K
Nov 24, 2023Jeanmonod PatrikChief Financial OfficerSell (S)3K$21K
Nov 20, 2023Yan MingChief Technology Officer, DirectorSell (S)20K$121K
Nov 7, 2023Jiang WenbinPresident and CEO, DirectorSell (S)20K$87K
Oct 24, 2023Jeanmonod PatrikChief Financial OfficerSell (S)3K$14K

Institutional ownership over time

129 funds+27 since Q3 2024
065129Q3 2024Q1 2025Q3 2025Q1 2026
funds holding aggregate valuelatest $345.5M

Recent filings

15 shown

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Ask your agent what changed in CTKB

This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.

Copy-paste
curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://arkolith.com/api/v1/stocks/CTKB/capital-change-brief"
Ask your agent
Use Arkolith's capital_change_brief for CTKB.
Tell me what changed, whether insider activity
corroborates it, and cite the SEC evidence.

13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for CTKB. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.