Rich Thomas R. 4

4 · Custom Truck One Source, Inc. · Filed Apr 3, 2026

AI-generated summary of this filing

Updated Apr 3, 2026

Custom Truck (CTOS) President Rich Thomas Exercises RSUs

What Happened

Rich Thomas, President — Rentals at Custom Truck One Source (CTOS), reported multiple restricted‑equity transactions on April 1, 2026. The filing shows he:
- Acquired 75,000 shares through exercise/conversion of derivative awards (reported at $0.00 per share).
- Was granted 100,000 restricted stock units (RSUs) (grant reported at $0.00 per share).
- Had 22,538 shares withheld to satisfy tax obligations at $6.62 per share, a withholding value of $149,202.
- The filing also reports conversion/disposition entries of 50,000 and 25,000 derivative units (each reported at $0.00).
These transactions reflect RSU conversions/awards rather than open‑market purchases or sales; the only cash‑value movement reported was the tax withholding.

Key Details

Transaction date(s): April 1, 2026. Filing date: April 3, 2026 (appears timely).
Prices/values reported:
- Withheld shares: 22,538 @ $6.62 = $149,202 (tax withholding, code F).
- Other entries reported at $0.00 per share (derivative conversions/grant).
Shares owned after the transaction: not specified in the supplied filing data.
Footnotes of note:
- F1: Each RSU represents a right to receive one share when settled.
- F2: The 22,538 shares were withheld to satisfy tax obligations from RSU vesting.
- F3–F5: The RSUs have multi‑year vesting schedules (some vesting beginning April 1, 2024; others beginning April 1, 2026 or 2027, with one tranche subject to milestone‑based partial acceleration).
Transaction codes explained: M = exercise/conversion of derivative; A = grant/award; F = shares withheld to cover tax liability.

Context

These are vesting/conversion and grant transactions involving RSUs. Withheld shares to cover taxes are a routine, administrative step (not an open‑market sale indicating a change in sentiment).
The filing reports derivative conversions and a new RSU award; no cash purchase of shares or open‑market sale by the insider is shown.

Form 4

Period: 2026-04-01

President - Rentals

Transactions

Exercise/Conversion
Common Stock
[F1]
2026-04-01+75,000→ 386,173 total
Tax Payment
Common Stock
[F2]
2026-04-01$6.62/sh−22,538$149,202→ 363,635 total
Exercise/Conversion
Restricted Stock Unit
[F1][F3]
2026-04-01−50,000→ 50,000 total
→ Common Stock (50,000 underlying)
Exercise/Conversion
Restricted Stock Unit
[F1][F4]
2026-04-01−25,000→ 75,000 total
→ Common Stock (25,000 underlying)
Award
Restricted Stock Unit
[F1][F5]
2026-04-01+100,000→ 100,000 total
→ Common Stock (100,000 underlying)

Footnotes (5)

[F1]Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.
[F2]Shares withheld to satisfy tax obligations arising out of vesting of the Reporting Person's restricted stock units.
[F3]The restricted stock units vest in four equal annual installments beginning on April 1, 2024.
[F4]The restricted stock units vest in four equal annual installments beginning on April 1, 2026.
[F5]The restricted stock units vest in four equal annual installments beginning on April 1, 2027, subject to continued service on the applicable vesting date and potential partial acceleration upon the achievement of certain corporate milestones.

Signature

By: /s/ Paul M. Jolas, Attorney-in-fact|2026-04-03

1 file