TWO SIGMA SECURITIES, LLC
Broker-DealerPosition in CTKB — Cytek Biosciences, Inc.
CIK 1450144
NEW YORK, NY
Position in CTKB
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$49,527
-$31,598 QoQ
Shares Held
11,180
-52.2% QoQ
Ownership
0.009%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#110
of 154 holders
Holding Since
Sep 2025
2 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, 2026TWO SIGMA SECURITIES, LLC holds $9,759,573 across 19 Medical Devices names. CTKB ranks #14 (0.5% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | BSX |
Boston Scientific Corp
|
98,200 | $4,191,176 | |
| 2 | MDT |
Medtronic plc
|
12,011 | $939,620 | |
| 3 | STE |
STERIS plc
|
4,452 | $937,457 | |
| 4 | PEN |
Penumbra Inc
|
2,709 | $855,366 | |
| 5 | DXCM |
Dexcom Inc
|
8,895 | $599,078 | |
| 6 | IRTC |
iRhythm Holdings, Inc.
|
3,265 | $388,371 | |
| 7 | HAE |
Haemonetics Corp
|
4,746 | $355,950 | |
| 8 | SYK |
Stryker Corp
|
1,066 | $335,619 |
All Filings in CTKB
Export CSV
2 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $49,527 | 11,180 | Shares | Sole | 2026-08-14 | |
| 2025-09-30 | $81,125 | 23,379 | Shares | Sole | 2025-11-14 | |
| No filing history on record for this holder in this stock. | ||||||