STATE OF WISCONSIN INVESTMENT BOARD
Position in CTKB — Cytek Biosciences, Inc.
CIK 854157
MADISON, WI
Position in CTKB
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$454,681
-$396,562 QoQ
Shares Held
104,046
-38.3% QoQ
Ownership
0.080%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Jun 2022
13 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, 2026STATE OF WISCONSIN INVESTMENT BOARD holds $434,626,517 across 40 Medical Devices names.
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ABT |
Abbott Laboratories
|
929,695 | $84,360,524 | |
| 2 | SYK |
Stryker Corp
|
184,144 | $57,975,896 | |
| 3 | MDT |
Medtronic plc
|
696,361 | $54,476,321 | |
| 4 | BSX |
Boston Scientific Corp
|
854,407 | $36,466,090 | |
| 5 | EW |
Edwards Lifesciences Corp
|
307,120 | $27,782,075 | |
| 6 | LIVN |
LivaNova PLC
|
296,350 | $24,368,860 | |
| 7 | GEHC |
GE HealthCare Technologies Inc.
|
251,519 | $16,099,731 | |
| 8 | GMED |
Globus Medical Inc
|
195,611 | $15,455,225 |
All Filings in CTKB
Export CSV
13 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $454,681 | 104,046 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $851,243 | 168,563 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $1,173,616 | 338,218 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $1,076,698 | 316,676 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $1,248,413 | 311,325 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $1,688,944 | 260,238 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $1,509,832 | 272,533 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $1,536,363 | 275,334 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $1,951,321 | 290,808 | Shares | Sole | 2024-05-14 | |
| 2023-12-31 | $2,558,087 | 280,492 | Shares | Sole | 2024-02-12 | |
| 2023-09-30 | $61,018 | 11,054 | Shares | Sole | 2023-11-14 | |
| 2022-09-30 | $185,000 | 12,568 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $173,729 | 16,191 | Shares | Sole | 2022-08-15 | |
| No filing history on record for this holder in this stock. | ||||||