PRTS · CarParts.com, Inc. · Holdings

$8.98 -0.33 (-3.54%) At close · Sep 14

Market Cap

$75.09M

8.07M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP →

Quarter:

Holders: 27

Total Value: $6,436,040

Total Shares: 999,388

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 27 13F filers · Δ vs Mar 31, 2026

Top Holder

25.2%

+4.8 pts

Top 5

78.5%

+12.5 pts

Top 10

92.2%

+9.0 pts

HHI

1,457

Broadly held+368

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: -18

Institutional value: -30.7%

Shares held: -91.5%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mega GEODE CAPITAL MANAGEMENT, LLC	+15,319	75,226
Mega VANGUARD CAPITAL MANAGEMENT LLC	+11,463	252,238
Mid SIMPLEX TRADING, LLC	+2,819	8,543
Mega NORTHERN TRUST CORP	+1,835	16,047
Mega MORGAN STANLEY	+382	7,838

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mega BlackRock, Inc.	−10,894	186,747
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP	−7,850	10,500
Mid North Star Investment Management Corp.	−4,063	139,522
Mega UBS Group AG	−3,546	27,816
Large RENAISSANCE TECHNOLOGIES LLC	−3,153	130,477

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mid GSA CAPITAL PARTNERS LLP	28,638	$184,428
Mega DIMENSIONAL FUND ADVISORS LP	11,134	$71,702
Mid Tower Research Capital LLC (TRC)	1,033	$6,652

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mega CITADEL ADVISORS LLC	59,260	$468,150
Mega JANE STREET GROUP, LLC	46,174	$364,772
Mega STATE STREET CORP	26,478	$209,173
Small Argentarii, LLC	15,000	$118,500
Mega GOLDMAN SACHS GROUP INC	14,821	$117,085

Filter: New 3 Increased 12 Reduced 8 Sold out 21 Unchanged 4

Showing 27 of 27

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

VANGUARD CAPITAL MANAGEMENT LLC

$1,624,412

25.24%

252,238

BlackRock, Inc.

$1,202,649

18.69%

186,747

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BLACKROCK FINANCIAL MANAGEMENT INC/DE	57,079	$367,588	30.6%	Sole
BlackRock Fund Advisors	6,982	$44,964	3.7%	Sole
BlackRock Institutional Trust Company, N.A.	122,638	$789,788	65.7%	Sole
Aperio Group, LLC	48	$309	0.0%	Sole

North Star Investment Management Corp.

$898,521

13.96%

139,522

RENAISSANCE TECHNOLOGIES LLC

$840,271

13.06%

130,477

GEODE CAPITAL MANAGEMENT, LLC

$484,455

7.53%

75,226

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	13,976	$90,005	18.6%	Defined
Held directly	61,250	$394,450	81.4%	Defined

VANGUARD FIDUCIARY TRUST CO

$252,602

3.92%

39,224

GSA CAPITAL PARTNERS LLP

$184,428

2.87%

28,638

UBS Group AG

$179,135

2.78%

27,816

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	27,816	$179,135	100.0%	Defined

Kerrisdale Advisers, LLC

$162,603

2.53%

25,249

NORTHERN TRUST CORP

$103,342

1.61%

16,047

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	16,047	$103,342	100.0%	Defined

FMR LLC

$86,476

1.34%

13,428

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	13,428	$86,476	100.0%	Defined

BARCLAYS PLC

$84,150

1.31%

13,067

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	12,927	$83,249	98.9%	Defined
BARCLAYS CAPITAL INC.	140	$901	1.1%	Defined

DIMENSIONAL FUND ADVISORS LP

$71,702

1.11%

11,134

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$67,620

1.05%

10,500

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	10,500	$67,620	100.0%	Other

HSBC HOLDINGS PLC

$67,014

1.04%

10,406

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
HSBC BANK PLC	10,406	$67,014	100.0%	Defined

SIMPLEX TRADING, LLC

$55,016

0.85%

8,543

MORGAN STANLEY

$50,475

0.78%

7,838

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY CAPITAL SERVICES, LLC	7,331	$47,211	93.5%	Defined
MORGAN STANLEY SMITH BARNEY LLC	123	$792	1.6%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	384	$2,472	4.9%	Defined

Vanguard Global Advisers, LLC

$11,733

0.18%

1,822

Tower Research Capital LLC (TRC)

$6,652

0.10%

1,033

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	1,033	$6,652	100.0%	Defined

Federation des caisses Desjardins du Quebec

$1,352

0.02%

210

OSAIC HOLDINGS, INC.

$650

0.01%

101

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	101	$650	100.0%	Defined

BNP PARIBAS ARBITRAGE, SA

$437

0.01%

ROYAL BANK OF CANADA

$192

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC Dominion Securities Inc.	20	$128	66.7%	Defined
Held directly	10	$64	33.3%	Sole

SBI Securities Co., Ltd.

$64

0.00%

JONES FINANCIAL COMPANIES LLLP

$45

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	7	$45	100.0%	Sole

WHITTIER TRUST CO

$38

0.00%

SHP Wealth Management

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	467,796	$369,558	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	170,542	$134,728	42.4%	Defined
Jane Street Global Trading, LLC	232,095	$183,355	57.6%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS TRUST COMPANY	264,777	$209,173	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	148,210	$117,085	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	124,800	$98,592	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	106,493	$84,129	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK OF AMERICA NA	70,094	$55,374	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	59,100	$46,689	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PGIM Quantitative Solutions LLC	44,400	$35,076	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RAYMOND JAMES & ASSOCIATES	33,806	$26,706	97.6%	Defined
Raymond James Financial Services Advisors, Inc.	825	$651	2.4%	Defined

Key facts CIK 1378950 CUSIP 14427M206 Visit website Investor relations