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Russell Investments Group, Ltd.

Position in CTKB — Cytek Biosciences, Inc.

CIK 1692234 Seattle, WA

Position in CTKB

as of Jun 30, 2026 · filed Aug 6, 2026
Position Value
$6,695,120
+$752,365 QoQ
Shares Held
1,511,315
+11.1% QoQ
Ownership
1.16%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#12
of 154 holders
Holding Since
Dec 2023
11 quarters on record
Voting authority Sole 73% Shared 0% None 27%

Common Shares in CTKB Over Time

Shares Held

Position Value (USD)

Position in Medical Devices

Healthcare · as of Jun 30, 2026

Russell Investments Group, Ltd. holds $1,017,089,401 across 86 Medical Devices names. CTKB ranks #13 (0.7% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in CTKB

Export CSV
11 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $6,695,120 1,511,315
2026-03-31 $5,942,755 1,359,900
2025-12-31 $5,055,683 1,001,127
2025-09-30 $553,507 159,513
2025-06-30 $94,502 27,795
2025-03-31 $270,207 67,384
2024-12-31 $180,433 27,802
2024-09-30 $211,654 38,205
2024-06-30 $46,648 8,360
2024-03-31 $1,288 192
2023-12-31 $1,103 121