InsiderTrades

Form 4 for CTOS Custom Truck One Source, Inc.

Accepted 2026-04-02 16:30:06 ET · period of report 2026-03-31 · accession 0001213900-26-039386 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X Filed Traded Ticker Insider Title Type Price Qty Owned ΔOwn Value
D 2026-04-02 16:30 2026-03-31 CTOS Heinberg Marshall A Dir M - OptEx $0.00 +48.3K 400.5K +14% $0
D 2026-04-02 16:30 2026-03-31 CTOS Heinberg Marshall A Dir M - OptEx $0.00 -48.3K 0 -100% $0
D 2026-04-02 16:30 2026-04-01 CTOS Heinberg Marshall A Dir A - Grant $0.00 +34.6K 34.6K New $0

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2026-03-31 M A 48,346 $0.00 400,548 D — — (F1) Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.
2 Derivative Restricted Stock Unit 2026-03-31 M D 48,346 $0.00 0 D — · — to — 48,346 Common Stock (F1) Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. (F2) The restricted stock units vested in full on March 31, 2026. (F2) The restricted stock units vested in full on March 31, 2026.
3 Derivative Restricted Stock Unit 2026-04-01 A A 34,605 $0.00 34,605 D — · — to — 34,605 Common Stock (F1) Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. (F3) The restricted stock units will vest on March 31, 2027 and have no expiration date. (F3) The restricted stock units will vest on March 31, 2027 and have no expiration date.