Simplex Trading’s CarParts.com PRTS Stock Holding History

Simplex Trading’s Portfolio PRTS Stock Details PRTS Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	–	Sell	-10	Closed	-$50	–	9919
2025 Q4	$50	Buy	+10	New	+$56	﹤0.01%	8327
2023 Q4	–	Sell	-80	Closed	-$3K	–	9604
2023 Q3	$3K	Hold	80	–	–	﹤0.01%	7936
2023 Q2	$3K	Sell	80 -110	-58%	-$4.92K	﹤0.01%	8263
2023 Q1	$10K	Sell	190 -330	-63%	-$20.9K	﹤0.01%	7562
2022 Q4	$32K	Sell	520 -90	-15%	-$4.71K	﹤0.01%	6388
2022 Q3	$31K	Buy	610 +370	+154%	+$26.9K	﹤0.01%	7036
2022 Q2	$16K	Buy	240 +70	+41%	+$5.11K	﹤0.01%	7834
2022 Q1	$11K	Sell	170 -310	-65%	-$26.7K	﹤0.01%	8805
2021 Q4	$53K	Sell	480 -1,360	-74%	-$187K	﹤0.01%	7196
2021 Q3	$353K	Buy	1,840 +1,390	+309%	+$242K	﹤0.01%	4651
2021 Q2	$91K	Buy	450 +426	+1,775%	+$71.3K	﹤0.01%	6867
2021 Q1	$348K	Sell	24 -26	-52%	-$4.2K	﹤0.01%	3938
2020 Q4	$614K	Buy	50 +42	+525%	+$5.42K	﹤0.01%	3163
2020 Q3	$81K	Buy	+8	New	+$979	﹤0.01%	5122

Other funds holding PRTS

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

NSIM

North Star Investment Management Chicago, Illinois $1.65B AUM 20.56% 1-Year Est. Return

Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

Jane Street New York $777B AUM 61.18% 1-Year Est. Return

VFT

Vanguard Fiduciary Trust Malvern, Pennsylvania $396B AUM

UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Simplex Trading's PRTS Position: Q1 2026 in Review

Simplex Trading increased its CarParts.com (PRTS) stake by 40% in Q1 2026, buying an estimated $10.6K and bringing the position to 5,724 shares worth $45K. The position accounts for ﹤0.01% of the portfolio, ranked #5996.

Simplex Trading first reported a position in PRTS in Q2 2020 and has held it in 15 quarters since. The position peaked at $1.44M in Q4 2020. 44 funds tracked by Wall St. Rank hold PRTS as of Q1 2026.

Simplex Trading held 5,724 shares of CarParts.com worth $45K as of Q1 2026.
Simplex Trading bought 1,631 CarParts.com shares in Q1 2026, an estimated $10.6K.
CarParts.com made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #5996 holding.
Simplex Trading first reported a position in CarParts.com in Q2 2020 and has held it in 15 quarters since.
Simplex Trading's CarParts.com position peaked at $1.44M in Q4 2020.
44 funds tracked by Wall St. Rank held CarParts.com as of Q1 2026.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.