SIMPLEX TRADING, LLC

Position in PRTS — CarParts.com, Inc.

CIK 1488542 CHICAGO, IL

Position in PRTS

as of Mar 31, 2026 · filed May 14, 2026 Compact

Position Value

$45,215

+$24,751 QoQ

Shares Held

57,235

+39.8% QoQ

Ownership

0.071%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Sep 2020

14 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Consumer Cyclical · as of Mar 31, 2026

SIMPLEX TRADING, LLC holds $15,829,930 across 28 Auto Parts names. PRTS ranks #17 (0.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	AAP	Advance Auto Parts Inc	69,028	$3,641,227
2	MBLY	Mobileye Global Inc.	329,323	$2,262,449
3	GT	Goodyear Tire & Rubber Co /Oh/	305,344	$2,024,430
4	LKQ	Lkq Corp	48,548	$1,425,854
5	MOD	Modine Manufacturing Co	6,017	$1,303,944
6	AUR	Aurora Innovation, Inc.	314,632	$1,296,283
7	BWA	Borgwarner Inc	17,384	$943,255
8	APTV	Aptiv PLC	10,819	$751,271

14 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
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	$6,819	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	$1,357	838	+44.2%	Shares	Sole	2024-04-25
2023-12-31	$1,835	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.