Xos director sells 5,000 shares of common stock

Xos director Dietmar Ostermann disclosed selling 5,000 XOS common shares in mid-September 2026 while retaining holdings that include 60,584 unvested RSUs.

Rhea-AI Filing Summary

Xos, Inc. (XOS) director Dietmar Ostermann reported two open-market sales of common stock. On September 16, 2026, he sold 262 shares at $2.54 per share, and on September 17, 2026, he sold 4,738 shares at $2.5501 per share, totaling 5,000 shares sold. A footnote states that his reported holdings after these transactions include 60,584 unvested RSUs. No Rule 10b5-1 trading plan is indicated.

Insider Trade Summary

Net Seller: 5,000 shares

Net Sell 2 txns

Insider OSTERMANN DIETMAR

Role Director

Sold 5,000 shs ($13K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	4,738	$2.5501	$12K
Sale	Common Stock F1	262	$2.54	$665.48

Holdings After Transaction: Common Stock — 85,226 shares (Direct)

Footnotes (1)

1. F1. Includes 60,584 unvested RSUs.

Key Figures

Shares sold September 16, 2026: 262 shares Shares sold September 17, 2026: 4,738 shares Total shares sold: 5,000 shares +3 more

6 metrics

Shares sold September 16, 2026 262 shares Common stock sale at $2.54 per share

Shares sold September 17, 2026 4,738 shares Common stock sale at $2.5501 per share

Total shares sold 5,000 shares Combined across both reported transactions

Sale price September 16, 2026 $2.54 per share 262-share open-market or private transaction sale

Sale price September 17, 2026 $2.5501 per share 4,738-share open-market or private transaction sale

Unvested RSUs included in holdings 60,584 units Unvested RSUs included in post-transaction ownership per footnote

Key Terms

Common Stock, unvested RSUs, open market or private transaction

3 terms

Common Stock financial

"reported two open-market sales of common stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

unvested RSUs financial

"Includes 60,584 unvested RSUs."

open market or private transaction financial

"Sale in open market or private transaction"

FAQ

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

What insider transaction did XOS director Dietmar Ostermann report?

He reported two open-market sales of Xos, Inc. common stock, selling a total of 5,000 shares on September 16 and 17, 2026, at prices around $2.54–$2.55 per share.

How many XOS shares did the director sell on each date?

On September 16, 2026, he sold 262 shares at $2.54 per share. On September 17, 2026, he sold 4,738 shares at $2.5501 per share, for a combined total of 5,000 shares sold.

At what prices were the XOS shares sold by the director?

The reported sale prices were $2.54 per share for 262 shares on September 16, 2026, and $2.5501 per share for 4,738 shares on September 17, 2026, both described as sales in an open market or private transaction.

Does the XOS Form 4 mention any remaining restricted stock units (RSUs)?

Yes. A footnote states that the director’s reported post-transaction holdings include 60,584 unvested RSUs, indicating that a portion of his equity position remains subject to vesting conditions.

Were the XOS insider sales made under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is unchecked, and there is no footnote indicating that these transactions were made pursuant to a Rule 10b5-1 trading plan.

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

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Available on EDGAR 09/18/2026 - 04:49 PM Accepted by SEC EDGAR 09/18/2026 - 04:48 PM 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^*

OSTERMANN DIETMAR

(Last) (First) (Middle)

C/O XOS, INC.

3550 TYBURN STREET, UNIT 100

(Street)

LOS ANGELES CALIFORNIA 90065

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Xos, Inc. [ XOS ]

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)
09/16/2026

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	09/16/2026		S		262	D	$2.54	89,964(1)	D
Common Stock	09/17/2026		S		4,738	D	$2.5501	85,226(1)	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

Explanation of Responses:

1. Includes 60,584 unvested RSUs.

	/s/ David M. Zlotchew, Attorney-in-Fact for Dietmar Ostermann	09/18/2026
	** 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)