SIMPLEX TRADING, LLC

Position in QUBT — Quantum Computing Inc.

CIK 1488542 CHICAGO, IL

Position in QUBT

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

Position Value

$761,779

-$375,677 QoQ

Shares Held

78,534

-52.7% QoQ

Ownership

0.035%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

#80

of 313 holders

Holding Since

Mar 2022

13 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Technology · as of Jun 30, 2026

SIMPLEX TRADING, LLC holds $26,546,426 across 14 Computer Hardware names. QUBT ranks #6 (2.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	SNDK	Sandisk Corp	4,518	$10,272,712
2	WDC	Western Digital Corp	11,430	$7,300,569
3	QBTS	D-Wave Quantum Inc.	122,302	$2,934,024
4	HPQ	Hp Inc	105,367	$2,311,751
5	RGTI	Rigetti Computing, Inc.	62,766	$1,212,639
6	QUBT	Quantum Computing Inc. This page	78,534	$761,779
7	STX	Seagate Technology Holdings plc	699	$674,535
8	VELO	Velo3D, Inc.	31,932	$560,406

13 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$761,779	78,534	-52.7%	Shares	Sole	2026-08-12
2026-03-31	$1,137,456	166,052	-69.8%	Shares	Sole	2026-05-14
2025-12-31	$5,633,242	549,049	+398.0%	Shares	Sole	2026-02-11
2025-03-31	$882,048	110,256	+246.6%	Shares	Sole	2025-05-12
2024-12-31	$526,422	31,808	+133.8%	Shares	Sole	2025-02-11
2024-09-30	$8	13,604	+324.5%	Shares	Sole	2024-11-08
2024-06-30	$1	3,205	+127.8%	Shares	Sole	2024-07-25
2023-12-31	$1	1,407	-90.4%	Shares	Sole	2024-02-02
2023-03-31	$19,285	14,722	+1.5%	Shares	Sole	2023-04-27
2022-12-31	$21,910	14,510	-22.7%	Shares	Sole	2023-02-02
2022-09-30	$47,095	18,763	+494.9%	Shares	Sole	2022-11-04
2022-06-30	$7,506	3,154	-42.5%	Shares	Sole	2022-08-03
2022-03-31	$14,271	5,489	—	Shares	Sole	2022-05-02
No filing history on record for this holder in this stock.