D. E. Shaw & Co., Inc.

Position in CTKB — Cytek Biosciences, Inc.

CIK 1009207 New York, NY

Position in CTKB

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$2,964,475

+$1,827,729 QoQ

Shares Held

669,182

+157.3% QoQ

Ownership

0.515%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#28

of 154 holders

Holding Since

Dec 2021

10 quarters on record

Voting authority Sole 99% Shared 0% None 1%

Healthcare · as of Jun 30, 2026

D. E. Shaw & Co., Inc. holds $2,440,827,278 across 59 Medical Devices names. CTKB ranks #31 (0.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	BSX	Boston Scientific Corp	25,457,409	$1,086,522,216
2	MDT	Medtronic plc	4,396,781	$343,960,176
3	ABT	Abbott Laboratories	1,457,592	$132,261,897
4	STE	STERIS plc	509,610	$107,308,577
5	BRKR	Bruker Corp	340,853	$99,997,183
6	SYK	Stryker Corp	270,554	$85,181,220
7	IRTC	iRhythm Holdings, Inc.	629,686	$74,901,149
8	INSP	Inspire Medical Systems, Inc.	1,470,462	$65,597,309

10 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$2,964,475	669,182	+157.3%	Shares	Defined	2026-08-14
2026-03-31	$1,136,746	260,125	-1.1%	Shares	Defined	2026-05-15
2025-12-31	$1,328,786	263,126	+117.4%	Shares	Defined	2026-02-17
2025-09-30	$419,946	121,022	-9.2%	Shares	Defined	2025-11-14
2023-03-31	$1,224,558	133,249	-29.8%	Shares	Defined	2023-05-15
2022-12-31	$1,936,621	189,679	+116.7%	Shares	Defined	2023-02-14
2022-09-30	$1,288,191	87,513	-58.5%	Shares	Defined	2022-11-14
2022-06-30	$2,261,905	210,802	-71.3%	Shares	Defined	2022-08-15
2022-03-31	$7,913,123	734,056	+4534.5%	Shares	Defined	2022-05-16
2021-12-31	$258,492	15,839	—	Shares	Defined	2022-02-14
No filing history on record for this holder in this stock.