Custom Truck One Source
CTOS
175 hedge funds and large institutions have $1.44B invested in Custom Truck One Source in 2026 Q1 according to their latest regulatory filings, with 44 funds opening new positions, 58 increasing their positions, 47 reducing their positions, and 24 closing their positions.
83% more first-time investments, than exits
New positions opened: 44 | Existing positions closed: 24
23% more repeat investments, than reductions
Existing positions increased: 58 | Existing positions reduced: 47
15% more capital invested
Capital invested by funds: $1.25B → $1.44B (+$191M)
11% more funds holding
Funds holding: 157 → 175 (+18)
1.03% more ownership
Funds ownership: 95.59% → 96.62% (+1%)
0% more funds holding in top 10
Funds holding in top 10: 2 → 2 (0)
100% less call options, than puts
Call options by funds: $0 | Put options by funds: $3K
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
JP Morgan Chase
New York
|
+$4.89M |
| 2 |
Dimensional Fund Advisors
Austin,
Texas
|
+$4.87M |
| 3 |
Arrowstreet Capital
Boston,
Massachusetts
|
+$4.22M |
| 4 |
Mackenzie Financial
Toronto Ontario,
Ontario, Canada
|
+$3.87M |
| 5 |
AQR Capital Management
Greenwich,
Connecticut
|
+$3.16M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Boston Partners
Boston,
Massachusetts
|
-$11.7M |
| 2 |
AAM
ACK Asset Management
Greenwich,
Connecticut
|
-$4.61M |
| 3 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
-$3.26M |
| 4 |
Russell Investments Group
London,
United Kingdom
|
-$2.6M |
| 5 |
Allspring Global Investments
Charlotte,
North Carolina
|
-$1.89M |
CTOS Hedge Fund Activity: Q1 2026 in Review
175 of the 8,187 institutional investors tracked by Wall St. Rank reported a position in Custom Truck One Source (CTOS) for Q1 2026, worth a combined $1.44B — up 15% from $1.25B a quarter earlier.
Buyers outnumbered sellers: 44 funds opened new CTOS positions and 24 closed out — a net gain of 20 holders — while 58 added to existing stakes and 47 trimmed.
The largest buyer was JP Morgan Chase, adding an estimated $4.89M. The largest seller was Boston Partners, cutting an estimated $11.7M.
- 175 institutional investors held Custom Truck One Source (CTOS) as of Q1 2026, up from 157 in Q4 2025.
- Funds reported $1.44B of Custom Truck One Source stock for Q1 2026, up 15% quarter-over-quarter.
- 44 funds opened new Custom Truck One Source positions in Q1 2026 and 24 closed out, a net change of +20 holders.
- The largest Custom Truck One Source buyer in Q1 2026 was JP Morgan Chase, an estimated $4.89M added.
- The largest Custom Truck One Source seller in Q1 2026 was Boston Partners, an estimated $11.7M sold.
Based on aggregated 13F filings for Q1 2026.