ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
Position in CTKB — Cytek Biosciences, Inc.
CIK 1164508
BOSTON, MA
Position in CTKB
as of Jun 30, 2026
· filed Aug 13, 2026
Position Value
$4,314,080
+$2,916,078 QoQ
Shares Held
973,833
+204.4% QoQ
Ownership
0.749%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#19
of 154 holders
Holding Since
Mar 2025
6 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in CTKB Over Time
Shares Held
Position Value (USD)
Position in Medical Devices
Healthcare · as of Jun 30, 2026ARROWSTREET CAPITAL, LIMITED PARTNERSHIP holds $6,427,484,644 across 45 Medical Devices names. CTKB ranks #29 (0.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | SYK |
Stryker Corp
|
3,282,207 | $1,033,370,051 | |
| 2 | MDT |
Medtronic plc
|
12,892,710 | $1,008,596,703 | |
| 3 | BSX |
Boston Scientific Corp
|
23,293,913 | $994,184,206 | |
| 4 | ABT |
Abbott Laboratories
|
10,897,178 | $988,809,931 | |
| 5 | EW |
Edwards Lifesciences Corp
|
5,677,344 | $513,572,538 | |
| 6 | DXCM |
Dexcom Inc
|
6,873,273 | $462,914,936 | |
| 7 | PEN |
Penumbra Inc
|
834,903 | $263,620,622 | |
| 8 | STE |
STERIS plc
|
1,217,864 | $256,445,622 |
All Filings in CTKB
Export CSV
6 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $4,314,080 | 973,833 | Shares | Defined | 2026-08-13 | |
| 2026-03-31 | $1,398,002 | 319,909 | Shares | Defined | 2026-05-14 | |
| 2025-12-31 | $1,826,468 | 361,677 | Shares | Defined | 2026-02-13 | |
| 2025-09-30 | $1,253,676 | 361,290 | Shares | Defined | 2025-11-13 | |
| 2025-06-30 | $490,456 | 144,252 | Shares | Defined | 2025-08-13 | |
| 2025-03-31 | $193,097 | 48,154 | Shares | Defined | 2025-05-14 | |
| No filing history on record for this holder in this stock. | ||||||