Simplex Trading
PRTS icon

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 		$45K Buy
5,724
+1,631
+40% +$10.6K ﹤0.01% 5996
2025
Q4 		$20.5K Buy
4,093
+2,925
+250% +$16.4K ﹤0.01% 6459
2025
Q3 		$8K Buy
1,168
+246
+27% +$2K ﹤0.01% 8042
2025
Q2 		$6K Sell
922
-3,242
-78% -$27.7K ﹤0.01% 7668
2025
Q1 		$41K Sell
4,164
-2,271
-35% -$24.9K ﹤0.01% 5979
2024
Q4 		$69K Buy
6,435
+1,955
+44% +$18K ﹤0.01% 5539
2024
Q3 		$40K Buy
4,480
+3,737
+503% +$35.3K ﹤0.01% 6091
2024
Q2 		$7K Buy
743
+659
+785% +$8.02K ﹤0.01% 7693
2024
Q1 		$1K Buy
84
+26
+45% +$651 ﹤0.01% 8626
2023
Q4 		$1K Buy
+58
New +$1.96K ﹤0.01% 8559
2023
Q1 		– Sell
-338
Closed -$21.4K – 9893
2022
Q4 		$21K Buy
+338
New +$17.7K ﹤0.01% 6839
2021
Q2 		– Sell
-2,937
Closed -$492K – 10571
2021
Q1 		$419K Sell
2,937
-8,724
-75% -$1.41M ﹤0.01% 3629
2020
Q4 		$1.44M Buy
11,661
+7,515
+181% +$970K ﹤0.01% 2123
2020
Q3 		$448K Buy
4,146
+2,754
+198% +$337K ﹤0.01% 3137
2020
Q2 		$120K Buy
+1,392
New +$74.2K ﹤0.01% 4605

Other funds holding PRTS

VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
BlackRock
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
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return
Jane Street
Jane Street New York $777B AUM 61.18% 1-Year Est. Return
VFT
Vanguard Fiduciary Trust Malvern, Pennsylvania $396B AUM
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
State Street
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.