Who owns Custom Truck One Source, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of CTOS from SEC Form 13F filings across 186 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 186 institutions disclosed 222.5M shares of Custom Truck One Source, Inc. worth $2.63B — about 97.8% of shares outstanding; the largest disclosed holder is Platinum Equity Advisors, LLC/DE. Source: SEC Form 13F filings, parsed by EvidInvest.
186
13F holders
$2.63B
value, 2026 filers
97.8%
of shares outstanding (222.5M sh)
39
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of CTOS's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | Platinum Equity Advisors, LLC/DE | 156.7M | $1.85B | 20.7% | 68.9% | 0.0% |
| 2 | DIMENSIONAL FUND ADVISORS LP | 6.2M | $72.9M | 0.0% | 2.7% | +10.2% |
| 3 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 6.2M | $72.7M | 0.1% | 2.7% | +8.5% |
| 4 | Canvas Wealth Advisors, LLC | 6.0M | $70.7M | 9.9% | 2.6% | -14.8% |
| 5 | BlackRock, Inc. | 4.6M | $54.0M | 0.0% | 2% | +7.5% |
| 6 | Allspring Global Investments Holdings, LLC | 2.7M | $29.7M | 0.0% | 1.2% | -31.2% |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | 2.6M | $30.5M | 0.0% | 1.1% | +2.1% |
| 8 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 2.2M | $26.0M | 0.0% | 1% | +108.4% |
| 9 | GOLDMAN SACHS GROUP INC | 1.9M | $22.2M | 0.0% | 0.8% | +264.1% |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | 1.7M | $20.4M | 0.0% | 0.8% | +17.5% |
| 11 | Alyeska Investment Group, L.P. | 1.6M | $19.4M | 0.0% | 0.7% | -41.9% |
| 12 | Boston Partners | 1.6M | $19.2M | 0.0% | 0.7% | -19.4% |
| 13 | JPMORGAN CHASE & CO | 1.6M | $19.0M | 0.0% | 0.7% | +106.1% |
| 14 | STATE STREET CORP | 1.5M | $17.9M | 0.0% | 0.7% | +2.2% |
| 15 | FIRST TRUST ADVISORS LP | 1.5M | $17.8M | 0.0% | 0.7% | +16.1% |
| 16 | MORGAN STANLEY | 1.3M | $14.9M | 0.0% | 0.6% | +40.2% |
| 17 | BANK OF AMERICA CORP /DE/ | 1.2M | $14.1M | 0.0% | 0.5% | -0.2% |
| 18 | ALGERT GLOBAL LLC | 1.2M | $13.9M | 0.2% | 0.5% | +499.8% |
| 19 | Clearbridge Investments, LLC | 1.0M | $11.9M | 0.0% | 0.4% | -28.3% |
| 20 | VANGUARD PORTFOLIO MANAGEMENT LLC | 954,705 | $11.3M | 0.0% | 0.4% | +88.2% |
| 21 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 908,125 | $10.7M | 0.2% | 0.4% | +7.5% |
| 22 | MACKENZIE FINANCIAL CORP | 885,956 | $10.5M | 0.0% | 0.4% | +50.4% |
| 23 | Empowered Funds, LLC | 873,125 | $10.3M | 0.1% | 0.4% | +7.8% |
| 24 | First Eagle Investment Management, LLC | 861,753 | $10.2M | 0.0% | 0.4% | +12.5% |
| 25 | AQR CAPITAL MANAGEMENT LLC | 753,989 | $8.9M | 0.0% | 0.3% | +15.9% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.