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 		$11.6K Sell
1,470
-120
-8% -$780 ﹤0.01% 7234
2025
Q4 		$7.95K Buy
+1,590
New +$8.9K ﹤0.01% 7139
2025
Q2 		– Sell
-1,090
Closed -$10K – 9522
2025
Q1 		$10K Buy
+1,090
New +$11.9K ﹤0.01% 7110
2024
Q3 		– Sell
-170
Closed -$1K – 9342
2024
Q2 		$1K Sell
170
-790
-82% -$9.61K ﹤0.01% 8534
2024
Q1 		$15K Buy
960
+350
+57% +$8.77K ﹤0.01% 7335
2023
Q4 		$19K Sell
610
-460
-43% -$15.5K ﹤0.01% 6969
2023
Q3 		$44K Buy
1,070
+560
+110% +$24.8K ﹤0.01% 5924
2023
Q2 		$21K Sell
510
-840
-62% -$37.5K ﹤0.01% 6738
2023
Q1 		$72K Sell
1,350
-40
-3% -$2.53K ﹤0.01% 5513
2022
Q4 		$87K Buy
1,390
+660
+90% +$34.6K ﹤0.01% 5251
2022
Q3 		$37K Buy
730
+40
+6% +$2.91K ﹤0.01% 6822
2022
Q2 		$47K Sell
690
-1,360
-66% -$99.3K ﹤0.01% 6590
2022
Q1 		$137K Sell
2,050
-70
-3% -$6.03K ﹤0.01% 5701
2021
Q4 		$237K Sell
2,120
-2,450
-54% -$337K ﹤0.01% 4928
2021
Q3 		$876K Buy
4,570
+10
+0.2% +$1.74K ﹤0.01% 3262
2021
Q2 		$928K Buy
4,560
+4,511
+9,206% +$755K ﹤0.01% 3232
2021
Q1 		$694K Buy
49
+34
+227% +$5.5K ﹤0.01% 2892
2020
Q4 		$182K Buy
15
+1
+7% +$129 ﹤0.01% 4739
2020
Q3 		$154K Buy
14
+13
+1,300% +$1.59K ﹤0.01% 4431
2020
Q2 		$12K Buy
+1
New +$53 ﹤0.01% 6550

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.