Custom Truck One Source, Inc.

Historical 13F Holders

Symbol
CTOS
CUSIP
23204X103
All holders as of
Q2 2026
Type
Equity
Class
COM CL A
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Every filing for 23204X103 since 12/18/2024, newest first.

Filer % of Class Filed
Mark Ein 13D/A Amendment 1
2.3% 10/21/2025
Event 10/17/2025
ECP ControlCo, LLC 13D/A Amendment 8
0% 2/3/2025
Event 1/30/2025
Platinum Equity, LLC 13D/A Amendment 2
69.6% 2/3/2025
Event 1/30/2025
ECP ControlCo, LLC 13D/A Amendment 7
7.0% 12/23/2024
Event 12/19/2024

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q3 3 35.7 k $325 k
2026 Q2 191 224 M $2.70 B
2026 Q1 176 219 M $1.44 B
2025 Q4 159 217 M $1.25 B
2025 Q3 150 215 M $1.38 B
2025 Q2 135 217 M $1.08 B
2025 Q1 150 214 M $900 M
2024 Q4 130 222 M $1.07 B
2024 Q3 126 220 M $761 M
2024 Q2 119 220 M $959 M
2024 Q1 128 215 M $1.25 B
2023 Q4 124 217 M $1.34 B
2023 Q3 114 223 M $1.39 B
2023 Q2 112 226 M $1.53 B
2023 Q1 107 227 M $1.54 B
2022 Q4 94 229 M $1.46 B
2022 Q3 91 229 M $1.34 B
2022 Q2 91 230 M $1.29 B
2022 Q1 87 228 M $1.91 B
2021 Q4 94 224 M $1.79 B
2021 Q3 75 218 M $2.03 B
2021 Q2 78 213 M $2.03 B
2021 Q1 2 76.8 k $718 k
2020 Q4 1 154 $1.00 k
2020 Q2 1 0 $0