CTOS director granted 19,225 RSUs, exercises 26,859

Custom Truck One Source director Georgia R. Nelson reported equity compensation activity in the form of restricted stock units and common shares.

Rhea-AI Filing Summary

Custom Truck One Source director Georgia R. Nelson reported equity compensation activity in the form of restricted stock units and common shares. She received a grant of 19,225 restricted stock units on April 1, 2026, each representing one share of common stock that will vest on March 31, 2027.

On March 31, 2026, previously granted restricted stock units covering 26,859 shares vested in full and were exercised into 26,859 shares of common stock. Following these transactions, Nelson directly owns 132,663 shares of common stock and 19,225 unvested restricted stock units.

Insider Trade Summary

26,859 shares exercised/converted

Exercise 3 txns

Insider NELSON GEORGIA R

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Unit	19,225	$0.00	$0.00
Exercise	Restricted Stock Unit	26,859	$0.00	$0.00
Exercise	Common Stock	26,859	$0.00	$0.00

Holdings After Transaction: Restricted Stock Unit — 19,225 contracts (Direct); Common Stock — 132,663 shares (Direct)

Footnotes (3)

1. F1. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.
2. F2. The restricted stock units vested in full on March 31, 2026.
3. F3. The restricted stock units will vest on March 31, 2027 and have no expiration date.

Key Figures

New RSU grant: 19,225 units RSUs vested and exercised: 26,859 units Common shares after transactions: 132,663 shares +1 more

4 metrics

New RSU grant 19,225 units Restricted stock units granted April 1, 2026

RSUs vested and exercised 26,859 units Restricted stock units vested March 31, 2026

Common shares after transactions 132,663 shares Direct CTOS common stock holdings post-transaction

Unvested RSUs outstanding 19,225 units Restricted stock units vesting March 31, 2027

Key Terms

Restricted Stock Unit, derivative security, vested in full, conversion or exercise

4 terms

Restricted Stock Unit financial

"Each restricted stock unit represents a contingent right to receive one share"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

derivative security financial

"Exercise or conversion of derivative security"

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

vested in full financial

"The restricted stock units vested in full on March 31, 2026"

conversion or exercise financial

"Exercise or conversion of derivative security"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did director Georgia R. Nelson report in the latest Form 4 for CTOS?

Georgia R. Nelson reported equity compensation activity, including a new restricted stock unit grant and the vesting and exercise of prior units into common shares. These transactions reflect routine director compensation rather than open-market buying or selling of Custom Truck One Source stock.

How many restricted stock units did Georgia R. Nelson receive from Custom Truck One Source (CTOS)?

Nelson received 19,225 restricted stock units, each convertible into one share of Custom Truck One Source common stock. These units were granted at no cash cost and represent part of her director compensation package, subject to future vesting conditions specified in the award terms.

When do Georgia R. Nelson’s new CTOS restricted stock units vest?

The newly granted 19,225 restricted stock units will vest on March 31, 2027, according to the filing footnotes. Once vested, each unit entitles her to receive one share of Custom Truck One Source common stock, increasing her potential equity stake if she holds the shares.

What happened to Georgia R. Nelson’s previously granted CTOS restricted stock units?

Previously granted restricted stock units covering 26,859 shares vested in full on March 31, 2026 and were exercised into an equal number of common shares. This converted her derivative award into direct share ownership, without indicating any open-market purchase or sale activity.

How many CTOS common shares does Georgia R. Nelson own after these transactions?

After the reported transactions, Nelson directly owns 132,663 shares of Custom Truck One Source common stock. She also holds 19,225 unvested restricted stock units, which may convert into additional shares if they vest on March 31, 2027 under the terms of the award.

Does Georgia R. Nelson’s Form 4 indicate open-market buying or selling of CTOS stock?

The Form 4 shows no open-market purchases or sales. All reported activity involves a grant of restricted stock units and the vesting and conversion of existing units into common shares, which are standard elements of director equity compensation at many public companies.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 04/02/2026 - 04:30 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

NELSON GEORGIA R

(Last) (First) (Middle)

7701 INDEPENDENCE AVE

(Street)

KANSAS CITY MISSOURI 64125

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Custom Truck One Source, Inc. [ CTOS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/31/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/31/2026		M		26,859	A	$0(1)	132,663	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Unit	(1)	03/31/2026		M			26,859	(2)	(2)	Common Stock	26,859	$0	0	D
Restricted Stock Unit	(1)	04/01/2026		A		19,225		(3)	(3)	Common Stock	19,225	$0	19,225	D

Explanation of Responses:

1. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

2. The restricted stock units vested in full on March 31, 2026.

3. The restricted stock units will vest on March 31, 2027 and have no expiration date.

	By: /s/ Paul M. Jolas, Attorney-in-fact	04/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)