CHARLES SCHWAB INVESTMENT MANAGEMENT INC
Position in CTKB — Cytek Biosciences, Inc.
CIK 884546
SAN FRANCISCO, CA
Position in CTKB
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$4,754,510
-$72,596 QoQ
Shares Held
1,073,253
-2.8% QoQ
Ownership
0.826%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#16
of 154 holders
Holding Since
Sep 2021
19 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, 2026CHARLES SCHWAB INVESTMENT MANAGEMENT INC holds $9,313,109,521 across 79 Medical Devices names. CTKB ranks #44 (0.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ABT |
Abbott Laboratories
|
59,674,507 | $5,414,864,764 | |
| 2 | MDT |
Medtronic plc
|
8,905,319 | $696,663,105 | |
| 3 | SYK |
Stryker Corp
|
2,148,933 | $676,570,065 | |
| 4 | BSX |
Boston Scientific Corp
|
9,223,151 | $393,644,084 | |
| 5 | EW |
Edwards Lifesciences Corp
|
3,693,034 | $334,071,855 | |
| 6 | DXCM |
Dexcom Inc
|
3,439,164 | $231,627,694 | |
| 7 | GEHC |
GE HealthCare Technologies Inc.
|
3,129,530 | $200,321,215 | |
| 8 | STE |
STERIS plc
|
666,633 | $140,372,910 |
All Filings in CTKB
Export CSV
19 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $4,754,510 | 1,073,253 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $4,827,106 | 1,104,601 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $5,527,421 | 1,094,539 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $3,834,422 | 1,105,021 | Shares | Sole | 2025-11-10 | |
| 2025-06-30 | $3,092,606 | 909,590 | Shares | Sole | 2025-08-12 | |
| 2024-12-31 | $6,898,805 | 1,062,990 | Shares | Sole | 2025-02-06 | |
| 2024-09-30 | $5,711,529 | 1,030,962 | Shares | Sole | 2024-11-12 | |
| 2024-06-30 | $5,121,519 | 917,835 | Shares | Sole | 2024-08-12 | |
| 2024-03-31 | $6,045,663 | 900,993 | Shares | Sole | 2024-05-09 | |
| 2023-12-31 | $8,025,946 | 880,038 | Shares | Sole | 2024-02-06 | |
| 2023-09-30 | $4,613,025 | 835,693 | Shares | Sole | 2023-11-08 | |
| 2023-06-30 | $5,973,661 | 699,492 | Shares | Sole | 2023-08-10 | |
| 2023-03-31 | $6,145,114 | 668,674 | Shares | Sole | 2023-05-12 | |
| 2022-12-31 | $6,820,902 | 668,061 | Shares | Sole | 2023-02-13 | |
| 2022-09-30 | $9,636,624 | 654,662 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $3,382,696 | 315,256 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $3,124,539 | 289,846 | Shares | Sole | 2022-05-13 | |
| 2021-12-31 | $1,725,089 | 105,704 | Shares | Sole | 2022-02-11 | |
| 2021-09-30 | $2,205,015 | 102,990 | Shares | Sole | 2021-11-16 | |
| No filing history on record for this holder in this stock. | ||||||