SIMPLEX TRADING, LLC

Position in QSI — Quantum-Si Inc

CIK 1488542 CHICAGO, IL

Position in QSI

as of Jun 30, 2026 · filed Aug 12, 2026 Compact

Position Value

$146,284

+$76,214 QoQ

Shares Held

165,293

+82.6% QoQ

Ownership

0.076%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#30

of 141 holders

Holding Since

Mar 2021

14 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Healthcare · as of Jun 30, 2026

SIMPLEX TRADING, LLC holds $16,900,559 across 44 Medical Devices names. QSI ranks #12 (0.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ABT	Abbott Laboratories	91,699	$8,320,767
2	TXG	10x Genomics, Inc.	51,807	$1,986,280
3	ENOV	Enovis CORP	51,073	$1,057,211
4	ZBH	Zimmer Biomet Holdings, Inc.	12,032	$1,035,834
5	DXCM	Dexcom Inc	9,225	$621,303
6	PEN	Penumbra Inc	1,843	$581,927
7	BFLY	Butterfly Network, Inc.	60,366	$508,281
8	ESTA	Establishment Labs Holdings Inc.	5,780	$495,981

14 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$146,284	165,293	+82.6%	Shares	Sole	2026-08-12
2026-03-31	$70,070	90,531	+12.5%	Shares	Sole	2026-05-14
2025-12-31	$88,557	80,507	-47.8%	Shares	Sole	2026-02-11
2025-09-30	$217,257	154,083	+46.0%	Shares	Sole	2025-11-12
2025-06-30	$206,846	105,534	+145.9%	Shares	Sole	2025-08-05
2025-03-31	$51,490	42,909	-86.0%	Shares	Sole	2025-05-12
2024-12-31	$828,276	306,769	+1057.7%	Shares	Sole	2025-02-11
2024-09-30	$23,372	26,499	+184.3%	Shares	Sole	2024-11-08
2023-06-30	$16,686	9,322	+76.6%	Shares	Sole	2023-08-04
2023-03-31	$9,291	5,279	-72.0%	Shares	Sole	2023-04-27
2022-12-31	$34,490	18,847	-27.2%	Shares	Sole	2023-02-02
2021-09-30	$215,839	25,880	-5.2%	Shares	Sole	2021-10-28
2021-06-30	$334,575	27,290	—	Shares	Sole	2021-08-12
2021-03-31 CAPA	—	21,605	—	Shares	Sole	2021-04-26
No filing history on record for this holder in this stock.