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Equibles

CTOS

Custom Truck One Source, Inc.

Company with tickers: CTOS

CIK
1709682
CUSIP
23204X103
Shares Outstanding
227,432,821
13F Activity (30d)
103 filings 99 filers

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.

Holders: 172
Total Value: $1,438,141,616
Total Shares: 218,895,242
Showing 1–100 of 172 holdings by value · page 1 of 2

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 172 13F filers · Δ vs Dec 31, 2025
Top Holder
71.6%
Mar 2024 → Mar 2026 · range 66.9% – 73.4%
−0.8 pts
Top 5
81.9%
Mar 2024 → Mar 2026 · range 81.3% – 86.2%
−0.5 pts
Top 10
87.7%
Mar 2024 → Mar 2026 · range 87.7% – 91.4%
−1.8 pts
HHI
5,166
Mar 2024 → Mar 2026 · range 4,566 – 5,430
Highly concentrated−113

Quarterly Activity

vs Dec 31, 2025
New
43
Increased
58
Decreased
46
Sold Out
27
Unchanged
25
Holder count: +16
Institutional value: +15.3%
Shares held: +1.1%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega JPMORGAN CHASE & CO +744,873 770,219
Mega DIMENSIONAL FUND ADVISORS LP +741,857 5,602,838
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP +642,109 1,056,550
Mega AQR CAPITAL MANAGEMENT LLC +481,718 650,700
Large Alyeska Investment Group, L.P. +325,591 2,825,820

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Large Boston Partners −1,777,191 2,016,406
Large Russell Investments Group, Ltd. −396,211 542,865
Large Allspring Global Investments Holdings, LLC −287,281 3,914,133
Mega BANK OF AMERICA CORP /DE/ −284,294 1,195,836
Large Squarepoint Ops LLC −199,950 46,402

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 2,525,744 $16,594,138
Large MACKENZIE FINANCIAL CORP 589,100 $3,870,387
Mega VANGUARD PORTFOLIO MANAGEMENT LLC 507,309 $3,333,020
Large HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC 452,640 $2,973,844
Large HRT FINANCIAL LP 411,892 $2,706,130

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 3,466,621 $19,967,735
Small ACK Asset Management LLC 800,136 $4,608,783
Mega T. Rowe Price Investment Management, Inc. 566,132 $3,260,920
Large VIRGINIA RETIREMENT SYSTEMS ET Al 63,687 $366,837
Large Verition Fund Management LLC 62,996 $362,856
Filter: New 43 Increased 58 Reduced 46 Sold out 27 Unchanged 25
Showing 100 of 172
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mid Platinum Equity Advisors, LLC/DE $1,029,805,681 71.61% 156,743,635
Small Canvas Wealth Advisors, LLC $46,118,285 3.21% 7,019,526
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $37,284,210 2.59% 5,674,918
Mega DIMENSIONAL FUND ADVISORS LP $36,810,643 2.56% 5,602,838
Mega BlackRock, Inc. $27,942,018 1.94% 4,252,972
Large Allspring Global Investments Holdings, LLC $25,715,853 1.79% 3,914,133
Large Alyeska Investment Group, L.P. $18,565,637 1.29% 2,825,820
Mega VANGUARD CAPITAL MANAGEMENT LLC $16,594,138 1.15% 2,525,744
Large Boston Partners $13,247,787 0.92% 2,016,406
Mega STATE STREET CORP $9,763,355 0.68% 1,486,051
Mega GEODE CAPITAL MANAGEMENT, LLC $9,662,077 0.67% 1,470,636
Mega Clearbridge Investments, LLC $9,224,050 0.64% 1,403,965
Mega FIRST TRUST ADVISORS LP $8,549,876 0.59% 1,301,351
Mega BANK OF AMERICA CORP /DE/ Bank $7,856,641 0.55% 1,195,836
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $6,941,533 0.48% 1,056,550
Mid HEARTLAND ADVISORS INC $6,570,000 0.46% 1,000,000
Mega MORGAN STANLEY $5,896,736 0.41% 897,525
Small INTRINSIC EDGE CAPITAL MANAGEMENT LLC $5,779,116 0.40% 879,622
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $5,552,405 0.39% 845,115
Large Empowered Funds, LLC $5,322,455 0.37% 810,115
Mega JPMORGAN CHASE & CO $5,060,337 0.35% 770,219
Large First Eagle Investment Management, LLC $5,031,450 0.35% 765,822
Mega JANE STREET GROUP, LLC $4,339,708 0.30% 660,534
Mega AQR CAPITAL MANAGEMENT LLC $4,275,096 0.30% 650,700
Large MACKENZIE FINANCIAL CORP $3,870,387 0.27% 589,100
Large Russell Investments Group, Ltd. $3,566,618 0.25% 542,865
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $3,399,390 0.24% 517,411
Mega GOLDMAN SACHS GROUP INC $3,388,378 0.24% 515,735
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $3,333,020 0.23% 507,309
Mega NORTHERN TRUST CORP Bank $3,213,228 0.22% 489,076
Large HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC $2,973,844 0.21% 452,640
Large HRT FINANCIAL LP $2,706,130 0.19% 411,892
Mega VANGUARD FIDUCIARY TRUST CO Bank $2,657,880 0.18% 404,548
Large SILVERCREST ASSET MANAGEMENT GROUP LLC $2,591,313 0.18% 394,416
Small Sendero Wealth Management, LLC $2,567,536 0.18% 390,797
Mega CITIGROUP INC $2,527,556 0.18% 384,712
Mid EFG International AG $2,306,075 0.16% 351,001
Small Private Capital Management, LLC $2,151,675 0.15% 327,500
Mega CITADEL ADVISORS LLC $1,841,971 0.13% 280,361
Mega MILLENNIUM MANAGEMENT LLC $1,693,910 0.12% 257,825
Mega Invesco Ltd. $1,603,768 0.11% 244,105
Large Point72 Asset Management, L.P. $1,591,181 0.11% 242,189
Large TUDOR INVESTMENT CORP ET AL $1,501,363 0.10% 228,518
Large SEI INVESTMENTS CO $1,495,120 0.10% 227,568
Mid Voleon Capital Management LP $1,446,543 0.10% 220,174
Mid GILDER GAGNON HOWE & CO LLC $1,431,451 0.10% 217,877
Mid ALGERT GLOBAL LLC $1,286,143 0.09% 195,760
Mega D. E. Shaw & Co., Inc. $1,200,897 0.08% 182,785
Large Trexquant Investment LP $1,178,467 0.08% 179,371
Small Register Financial Advisors LLC $1,124,784 0.08% 171,200
Large Mariner, LLC $1,105,119 0.08% 168,207
Mega Bank of New York Mellon Corp Bank $1,026,508 0.07% 156,242
Mega Nuveen, LLC $985,439 0.07% 149,991
Small EntryPoint Capital, LLC $966,952 0.07% 147,177
Mega BNP PARIBAS ARBITRAGE, SA $951,960 0.07% 144,895
Mega Swiss National Bank Bank $881,037 0.06% 134,100
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $875,254 0.06% 133,220
Mid SAPIENT CAPITAL LLC $839,383 0.06% 127,760
Small SANDLER CAPITAL MANAGEMENT $809,956 0.06% 123,281
Mega AMERICAN CENTURY COMPANIES INC $780,062 0.05% 118,731
Mega CANADA PENSION PLAN INVESTMENT BOARD Pension $714,816 0.05% 108,800
Mega FMR LLC $698,140 0.05% 106,262
Mid GSA CAPITAL PARTNERS LLP $612,087 0.04% 93,164
Large STRS OHIO $605,754 0.04% 92,200
Mid Cornerstone Investment Partners, LLC $590,892 0.04% 89,938
Mid Brevan Howard Capital Management LP $571,674 0.04% 87,013
Mid ARISTEIA CAPITAL, L.L.C. $549,449 0.04% 83,630
Mega UBS Group AG $540,395 0.04% 82,252
Mega ALLIANCEBERNSTEIN L.P. $485,325 0.03% 73,870
Mega RHUMBLINE ADVISERS $470,641 0.03% 71,635
Small VARCOV Co. $454,216 0.03% 69,135
Small Biondo Investment Advisors, LLC $453,330 0.03% 69,000
Mid Pine Valley Investments Ltd Liability Co $446,760 0.03% 68,000
Mega LPL Financial LLC $445,518 0.03% 67,811
Large Balyasny Asset Management L.P. $420,538 0.03% 64,009
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $404,146 0.03% 61,514
Mid Graham Capital Management, L.P. $393,746 0.03% 59,931
Mid Jump Financial, LLC $369,509 0.03% 56,242
Large IEQ CAPITAL, LLC $339,143 0.02% 51,620
Mega Legal & General Group Plc $330,620 0.02% 50,323
Mega DEUTSCHE BANK AG\ Bank $324,295 0.02% 49,360
Small Numerai GP LLC $318,290 0.02% 48,446
Large Zurcher Kantonalbank (Zurich Cantonalbank) Bank $308,376 0.02% 46,937
Large Squarepoint Ops LLC $304,861 0.02% 46,402
Mega AMERIPRISE FINANCIAL INC $276,997 0.02% 42,161
Mega PRICE T ROWE ASSOCIATES INC /MD/ $267,977 0.02% 40,788
Mega WELLS FARGO & COMPANY/MN $258,738 0.02% 39,382
Large Cetera Investment Advisers $256,420 0.02% 39,029
Small FOX RUN MANAGEMENT, L.L.C. $253,096 0.02% 38,523
Mega VANGUARD ASSET MANAGEMENT, Ltd $239,469 0.02% 36,449
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance $225,305 0.02% 34,293
Small PREVAIL INNOVATIVE WEALTH ADVISORS, LLC $218,261 0.02% 33,221
Large MetLife Investment Management, LLC $211,586 0.01% 32,205
Large RENAISSANCE TECHNOLOGIES LLC $207,979 0.01% 31,656
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $199,938 0.01% 30,432
Mega TWO SIGMA INVESTMENTS, LP $198,098 0.01% 30,152
Mega ENVESTNET ASSET MANAGEMENT INC $191,522 0.01% 29,151
Mega JANUS HENDERSON GROUP PLC $189,216 0.01% 28,800
Large M&T Bank Corp Bank $184,096 0.01% 28,021
Small 9823 Capital, L.P. $181,272 0.01% 27,591

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