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SCHEDULE Filed 2025-02-03 Event 2025-01-30 SEC 0001104659-25-008747 →

PLATINUM EQUITY, LLC Custom Truck One Source, Inc. CTOS

Stake: 69.60% Shares: 156,743,635 CUSIP: 23204X103 Class: Common Stock

Item 4 — Purpose of Transaction

Item 4 of the Schedule 13D is hereby amended and supplemented as follows: Stock Purchase Agreement Item 3 above summarizes the ECP Stock Purchase Agreement and is incorporated herein by reference. General The Reporting Persons acquired the securities described in this Schedule 13D for investment purposes and they intend to review their investments in the Issuer on a continuing basis. Any actions the Reporting Persons might undertake will be dependent upon the Reporting Persons' review of numerous factors, including, but not limited to: an ongoing evaluation of the Issuer's business, financial condition, operations and prospects; price levels of the Issuer's securities; general market, industry and economic conditions; the relative attractiveness of alternative business and investment opportunities; and other future developments. The Reporting Persons may acquire additional securities of the Issuer, or retain or sell all or a portion of the securities then held, in the open market or in privately negotiated transactions. In addition, the Reporting Persons, including its designees to the Issuer's Board in their positions as directors of the Issuer, may engage in discussions with management, the Board, and other securityholders of the Issuer and other relevant parties or encourage, cause or seek to cause the Issuer or such persons to consider or explore extraordinary corporate transactions, such as: a merger, reorganization or take-private transaction that could result in the de-listing or de-registration of the Common Stock; security offerings and/or stock repurchases by the Issuer; sales or acquisitions of assets or businesses; changes to the capitalization or dividend policy of the Issuer; or other material changes to the Issuer's business or corporate structure, including changes in management or the composition of the Board. To facilitate their consideration of such matters, the Reporting Persons may retain consultants and advisors and may enter into discussions with potential sources of capital and other third parties. The Reporting Persons may exchange information with any such persons pursuant to appropriate confidentiality or similar agreements. The Reporting Persons will likely take some or all of the foregoing steps at preliminary stages in their consideration of various possible courses of action before forming any intention to pursue any particular plan or direction. Other than as described above, the Reporting Persons do not currently have any plans or proposals that relate to, or would result in, any of the matters listed in Items 4(a)-(j) of Schedule 13D, although, depending on the factors discussed herein, the Reporting Persons may change their purpose or formulate different plans or proposals with respect thereto at any time.

Cross-References

Insider Activity (last 365d)
0 transactions
0 buys · 0 sales · 0 awards/exercises
Issuer Cluster
2 13D/G filings on this issuer
1 other filing besides this one
Filer Track Record
1 filings by this filer
0 other filings in the data moat
Short Interest · settle 2026-03-31
DTC 2.65
1,961,641 shares short · +5.1% vs prior

Institutional Consensus · 2025-12-31

Held by elite portfolio managers
1 holder · $2.22M
Point72 Asset Mgmt

Other 13D/G Filings on Custom Truck One Source, Inc.

FiledFormFilerStakeShares
2025-02-03 SCHEDULE ECP ControlCo, LLC view →

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