Xos director plans sale of 10,000 vested shares

Xos, Inc. (XOS) received a notice under Rule 144 that director Dietmar Ostermann, through UBS Financial Services Inc. as broker, intends to sell shares of Xos common stock.

Rhea-AI Filing Summary

Xos, Inc. (XOS) received a notice under Rule 144 that director Dietmar Ostermann, through UBS Financial Services Inc. as broker, intends to sell shares of Xos common stock. The planned sale relates to 10,000 shares from RSU vesting on 06/23/2025, and follows several smaller open-market sales in July 2026. The notice is signed by UBS Financial Services Inc. as attorney-in-fact for Dietmar Ostermann.

Key Figures

Planned shares to be sold: 10,000 shares Sale on 07/10/2026: 4,158 shares Sale on 07/13/2026: 4,159 shares +4 more

7 metrics

Planned shares to be sold 10,000 shares Common stock tied to RSU vesting on 06/23/2025 to be sold under Rule 144

Sale on 07/10/2026 4,158 shares Common stock reported as sold by Dietmar Ostermann on 07/10/2026

Sale on 07/13/2026 4,159 shares Common stock reported as sold by Dietmar Ostermann on 07/13/2026

Sale on 07/14/2026 4,158 shares Common stock reported as sold by Dietmar Ostermann on 07/14/2026

Sale on 07/15/2026 4,159 shares Common stock reported as sold by Dietmar Ostermann on 07/15/2026

Sale on 07/17/2026 4,159 shares Common stock reported as sold by Dietmar Ostermann on 07/17/2026

Rule 144 notice date 08/20/2026 Date associated with the Form 144 remarks and signature

Key Terms

Rule 144, restricted stock units (RSUs), attorney-in-fact, beneficial ownership

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

restricted stock units (RSUs) financial

"Common Stock | 06/23/2025 | RSU Vesting | Issuer"

Restricted stock units (RSUs) are a type of company promise to give employees shares of stock in the future, usually after certain conditions like working for a set time. They are like a gift promised today that you receive later, which can become valuable if the company's stock price goes up. RSUs matter because they are a way companies reward employees and can be a significant part of compensation.

attorney-in-fact regulatory

"as attorney-in-fact for Dietmar Ostermann"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

beneficial ownership regulatory

"persons whose sales are required by paragraph (e) of Rule 144 to be aggregated"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

FAQ

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

What does the Form 144 filing disclose about XOS director Dietmar Ostermann?

The filing states that director Dietmar Ostermann intends to sell Xos, Inc. (XOS) common stock under Rule 144, with UBS Financial Services Inc. acting as broker and attorney-in-fact for executing the planned sales.

How many XOS shares are planned for sale under this Rule 144 notice?

The notice indicates a plan to sell 10,000 shares of Xos common stock. These shares are tied to RSU vesting on 06/23/2025, as disclosed in the “Securities To Be Sold” section of the filing.

What is the origin of the XOS shares being sold by Dietmar Ostermann?

The filing links the 10,000 XOS shares to RSU vesting on 06/23/2025 from the issuer. This means the shares to be sold were acquired through restricted stock unit awards that vested on that date.

What recent XOS stock sales by Dietmar Ostermann are reported in the Form 144?

The document lists sales of 4,158–4,159 shares of Xos common stock on 07/10, 07/13, 07/14, 07/15, and 07/16–07/17/2026, each entry showing the number of shares and associated transaction values.

Which broker is handling the planned XOS share sales under Rule 144?

The planned Rule 144 sales of Xos (XOS) shares are associated with UBS Financial Services Inc.. The notice is signed “/s/ Mijo Suric, for UBS Financial Services Inc, as attorney-in-fact for Dietmar Ostermann.”

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

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Accepted by SEC EDGAR 08/20/2026 - 02:04 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001179705
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Xos, Inc.
SEC File Number	001-39598
Address of Issuer	3550 TYBURN STREET Los Angeles CALIFORNIA 90065
Phone	(818) 316-1890
Name of Person for Whose Account the Securities are To Be Sold	Dietmar Ostermann
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock	UBS Financial Services Inc 1000 Harbor Blvd 3rd Floor Weehawken NJ 07086	10000	25000	14217752	08/20/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	06/23/2025	RSU Vesting	Issuer			10000	06/23/2025	NA

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Dietmar Ostermann 3550 Tyburn Street Los Angeles CA 90065	Common Stock	07/10/2026	4158	10368
Dietmar Ostermann 3550 Tyburn Street Los Angeles CA 90065	Common Stock	07/13/2026	4159	9755
Dietmar Ostermann 3550 Tyburn Street Los Angeles CA 90065	Common Stock	07/14/2026	4158	9943
Dietmar Ostermann 3550 Tyburn Street Los Angeles CA 90065	Common Stock	07/15/2026	4159	9576
Dietmar Ostermann 3550 Tyburn Street Los Angeles CA 90065	Common Stock	07/16/2026	4158	8984
Dietmar Ostermann 3550 Tyburn Street Los Angeles CA 90065	Common Stock	07/17/2026	4159	8935

144: Remarks and Signature

Remarks
Date of Notice	08/20/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/Mijo Suric, for UBS Financial Services Inc, as attorney-in-fact for Dietmar Ostermann
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)