CarParts.com, Inc. (PRTS) Ownership
PRTS ownership summary
as of October 18, 2026- Institutions
- 12.9% of shares outstanding
- Insiders
- 16.09% of shares outstanding
- Shares outstanding
- 8.1M
- Float
- 6.9M shares available to trade
- Short interest
- 6.31% 456K shares short
- Days to cover
- 5.59 short interest up 0.6% vs prior month
- Institutions 12.86%
- Insiders 16.09%
- Other investors 71.05%
PRTS top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard Capital Management, LLC | 3.28% | 252K | $2.0M | +11,463 (+4.8%) | June 30, 2026 |
| 2 | BlackRock Inc | 2.43% | 187K | $1.5M | −10,894 (−5.5%) | June 30, 2026 |
| 3 | Argentarii, LLC | 0.20% | 150K | $1.2M | — | March 31, 2026 |
| 4 | North Star Investment Management Corp | 1.81% | 140K | $1.1M | −4,063 (−2.8%) | June 30, 2026 |
| 5 | Renaissance Technologies Corp | 1.70% | 130K | $1.0M | −3,153 (−2.4%) | June 30, 2026 |
| 6 | Geode Capital Management, LLC | 0.98% | 75K | $597,294 | +15,319 (+25.6%) | June 30, 2026 |
| 7 | Vanguard Fiduciary Trust Co | 0.51% | 39K | $311,439 | +266 (+0.7%) | June 30, 2026 |
| 8 | GSA Capital Partners LLP | 0.37% | 29K | $227,386 | +28,638 (0.0%) | June 30, 2026 |
| 9 | UBS Group AG | 0.36% | 28K | $220,859 | −3,546 (−11.3%) | June 30, 2026 |
| 10 | State Street Corp | 0.34% | 26K | $210,227 | −1 (−0.0%) | June 30, 2026 |
| 11 | Kerrisdale Advisers, LLC | 0.33% | 25K | $200,477 | — | June 30, 2026 |
| 12 | Northern Trust Corp | 0.21% | 16K | $127,413 | +1,836 (+12.9%) | June 30, 2026 |
| 13 | FMR Inc | 0.17% | 13K | $106,618 | +1 (+0.0%) | June 30, 2026 |
| 14 | Barclays PLC | 0.17% | 13K | $103,752 | +142 (+1.1%) | June 30, 2026 |
| 15 | Dimensional Fund Advisors, Inc. | 0.14% | 11K | $88,404 | +11,134 (0.0%) | June 30, 2026 |
| 16 | HSBC Holdings PLC | 0.14% | 10K | $82,624 | — | June 30, 2026 |
| 17 | SIMPLEX TRADING, LLC | 0.11% | 8,543 | $67,831 | +2,820 (+49.3%) | June 30, 2026 |
| 18 | Morgan Stanley - Brokerage Accounts | 0.10% | 7,838 | $62,234 | +382 (+5.1%) | June 30, 2026 |
| 19 | Vanguard Global Advisers, LLC | 0.02% | 1,822 | $14,467 | +1 (+0.1%) | June 30, 2026 |
| 20 | Tower Research Capital LLC | 0.01% | 1,033 | $8,202 | +1,033 (0.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 12 holders added 73K shares and 5 cut 22K.
PRTS top mutual fund and ETF holders
18 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BSF Systematic US Eq Abs Ret A2 USD | 0.46% | 354K | $2.8M | — | December 31, 2025 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 3.16% | 243K | $1.9M | +70,510 (+40.8%) | August 31, 2026 |
| 3 | North Star Micro Cap I | 1.50% | 115K | $913,100 | +50,000 (+76.9%) | September 30, 2026 |
| 4 | Fidelity Extended Market Index | 0.50% | 39K | $307,929 | −208 (−0.5%) | August 31, 2026 |
| 5 | Fidelity VIP Disciplined Small Cap Init | 0.17% | 13K | $106,618 | — | July 31, 2026 |
| 6 | Fidelity Series Total Market Index | 0.14% | 10K | $83,362 | +1,044 (+11.0%) | August 31, 2026 |
| 7 | Fidelity Total Market Index | 0.13% | 10K | $79,733 | +1,053 (+11.7%) | August 31, 2026 |
| 8 | Vanguard MStar Inst Ttl StkMktIdxInstlPl | 0.09% | 7,194 | $57,120 | — | August 31, 2026 |
| 9 | BlackRock Diversified Equity Alpha Inst | 0.09% | 6,982 | $55,437 | — | July 31, 2026 |
| 10 | Fidelity Nasdaq Composite Index | 0.05% | 3,704 | $29,410 | — | August 31, 2026 |
| 11 | DFA US Micro Cap I | 0.05% | 3,571 | $28,354 | — | August 31, 2026 |
| 12 | Dimensional US Small Cap ETF | 0.04% | 2,804 | $22,264 | — | September 30, 2026 |
| 13 | DFA US Sustainability Core 1 | 0.03% | 2,505 | $19,890 | — | August 31, 2026 |
| 14 | DFA US Core Equity Class F | 0.02% | 1,828 | $14,514 | +1,828 (0.0%) | July 31, 2026 |
| 15 | Vanguard U.S. Eq Idx £ Acc | 0.02% | 1,822 | $14,467 | — | August 31, 2026 |
| 16 | Dimensional US Core Equity 2 ETF | 0.02% | 1,736 | $13,784 | — | September 30, 2026 |
| 17 | DFA US Vector Equity I | 0.02% | 1,686 | $13,387 | — | August 31, 2026 |
| 18 | DFA US Social Core Equity 2 Portfolio | 0.01% | 568 | $4,510 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
PRTS insider transactions
latest 4| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2024-06-11 | Jim Barnes | Buy | $1.10 | 94,000 | $103,400 |
| 2024-05-10 | Jay Keith Greyson | Buy | $1.04 | 41,658 | $43,324 |
| 2023-08-04 | Michael Huffaker | Buy | $4.41 | 2,466 | $10,875 |
| 2023-05-15 | Ryan Lockwood | Sell | $4.43 | 818 | $3,624 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
PRTS shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns PRTS
Institutional investors own 12.9% of CarParts.com's shares and insiders 16.09%. The largest holder is Vanguard Capital Management, LLC with 3.28% of the shares (252K), as of June 30, 2026. Among the top 20 institutions, 12 added shares and 5 reduced their stake in the latest filings. Short interest is 6.31% of the float, or 5.59 days of average trading volume. The share count rose 82.3% since 2014.
Related: PRTS analyst forecast, PRTS key metrics. See the PRTS stock overview for the latest quote and news.
PRTS ownership FAQ
Who owns the most CarParts.com stock?
The largest shareholders of CarParts.com are Vanguard Capital Management, LLC (3.28%), BlackRock Inc (2.43%), Argentarii, LLC (0.20%), North Star Investment Management Corp (1.81%), Renaissance Technologies Corp (1.70%).
What percentage of CarParts.com is owned by institutions?
Institutions hold 12.9% of CarParts.com's shares outstanding; insiders hold 16.09%.
Which funds own CarParts.com?
The largest fund holders of CarParts.com are BSF Systematic US Eq Abs Ret A2 USD (0.46%), Vanguard MStar Total Stk Mkt Idx Invest (3.16%), North Star Micro Cap I (1.50%), Fidelity Extended Market Index (0.50%), Fidelity VIP Disciplined Small Cap Init (0.17%).
What is CarParts.com's short interest?
456K shares of CarParts.com were sold short, 6.31% of the float; at the average daily volume it would take 5.59 days to cover.
Are insiders buying or selling CarParts.com?
Of the latest 4 reported insider transactions in CarParts.com (since May 15, 2023), 3 were purchases and 1 were sales.
How many shares of CarParts.com are outstanding?
CarParts.com has 8.1M shares outstanding, of which 6.9M are in the public float.