SIMPLEX TRADING, LLC

Position in PRTS — CarParts.com, Inc.

CIK 1488542 CHICAGO, IL

Position in PRTS

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

Position Value

$55,016

+$9,801 QoQ

Shares Held

8,543

+49.2% QoQ

Ownership

0.106%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#15

of 26 holders

Holding Since

Sep 2020

15 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Consumer Cyclical · as of Jun 30, 2026

SIMPLEX TRADING, LLC holds $17,344,234 across 27 Auto Parts names. PRTS ranks #20 (0.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	AAP	Advance Auto Parts Inc	54,075	$3,364,546
2	AUR	Aurora Innovation, Inc.	361,164	$2,463,138
3	QS	QuantumScape Corp	260,905	$1,972,441
4	MBLY	Mobileye Global Inc.	167,092	$1,617,450
5	MGA	Magna International Inc	23,293	$1,529,418
6	GT	Goodyear Tire & Rubber Co /Oh/	216,855	$1,431,243
7	APTV	Aptiv PLC	22,600	$1,387,188
8	MOD	Modine Manufacturing Co	4,568	$1,219,747

15 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$55,016	8,543	-85.1%	Shares	Sole	2026-08-12
2026-03-31	$45,215	57,235	+39.8%	Shares	Sole	2026-05-14
2025-12-31	$20,464	40,928	+250.4%	Shares	Sole	2026-02-11
2025-09-30	$8,294	11,682	+26.8%	Shares	Sole	2025-11-12
2025-06-30	$6	9,215	-77.9%	Shares	Sole	2025-08-05
2025-03-31	$41,638	41,638	-35.3%	Shares	Sole	2025-05-12
2024-12-31	$69,499	64,351	+43.6%	Shares	Sole	2025-02-11
2024-09-30	$40,767	44,799	+503.2%	Shares	Sole	2024-11-08
2024-06-30	$7,427	7,427	+786.3%	Shares	Sole	2024-07-25
2024-03-31	$1	838	+44.2%	Shares	Sole	2024-04-25
2023-12-31	$1	581	-82.8%	Shares	Sole	2024-02-02
2022-12-31	$21,177	3,383	-88.5%	Shares	Sole	2023-02-02
2021-03-31	$419,332	29,365	-74.8%	Shares	Sole	2021-04-26
2020-12-31	$1,444,810	116,611	+181.3%	Shares	Sole	2021-02-02
2020-09-30	$448,150	41,457	—	Shares	Sole	2020-10-14
No filing history on record for this holder in this stock.