Stem insider plans sale of 1,138 common shares

Stem, Inc. insider Brian Musfeldt filed to sell common stock through Fidelity Brokerage Services LLC.

Rhea-AI Filing Summary

Stem, Inc. insider Brian Musfeldt filed to sell common stock through Fidelity Brokerage Services LLC. The notice covers up to 1,138 common shares, related to restricted stock vesting on August 7, 2026, with proposed sales beginning on August 10, 2026.

The filing also reports that Musfeldt previously sold 996 common shares on July 20, 2026 for an aggregate amount of $6,087.75.

Key Figures

Planned shares to be sold: 1,138 shares Prior shares sold: 996 shares Prior sale proceeds: $6,087.75 +1 more

4 metrics

Planned shares to be sold 1,138 shares Common stock proposed for sale beginning August 10, 2026

Prior shares sold 996 shares Common stock sold on July 20, 2026

Prior sale proceeds $6,087.75 Aggregate consideration for 996 shares sold on July 20, 2026

Restricted stock vesting date 08/07/2026 Date of restricted stock vesting related to proposed sale

Key Terms

restricted stock vesting, compensation, Fidelity Brokerage Services LLC

3 terms

restricted stock vesting financial

"Common | 08/07/2026 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

compensation financial

"1138 | 08/07/2026 | Compensation"

Fidelity Brokerage Services LLC financial

"Common | Fidelity Brokerage Services LLC 900 Salem Street"

FAQ

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

What does the STEM Form 144 filing by Brian Musfeldt disclose?

The filing discloses that Brian Musfeldt intends to sell up to 1,138 shares of Stem, Inc. common stock. The shares are to be sold through Fidelity Brokerage Services LLC following a recent restricted stock vesting event.

How many STEM shares is Brian Musfeldt planning to sell under this notice?

Musfeldt plans to sell up to 1,138 common shares of Stem, Inc. The proposed sale is associated with restricted stock vesting on August 7, 2026, and the sales may begin on August 10, 2026 on the NYSE.

What prior STEM share sales by Brian Musfeldt are reported in this Form 144?

The filing reports that on July 20, 2026, Musfeldt sold 996 common shares of Stem, Inc. These shares were sold for an aggregate consideration of $6,087.75, reflecting trading activity in the three months before the new proposed sale.

What is the relationship between the STEM Form 144 sale and restricted stock vesting?

The planned sale of 1,138 STEM common shares is tied to a restricted stock vesting event on August 7, 2026. The issuer is listed as the source of the restricted shares, and the transaction is categorized as compensation.

Through which broker will the proposed STEM share sale be executed?

The proposed sale will be executed through Fidelity Brokerage Services LLC. The broker’s address is listed in Smithfield, Rhode Island, and the shares are identified as common stock to be sold on the NYSE beginning August 10, 2026.

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

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Accepted by SEC EDGAR 08/10/2026 - 05:27 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	0002081813
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	STEM, INC.
SEC File Number	001-39455
Address of Issuer	1400 POST OAK BOULEVARD, SUITE 560 HOUSTON TEXAS 77056
Phone	877-374-7836
Name of Person for Whose Account the Securities are To Be Sold	Musfeldt Brian
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	Officer

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	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	1138	6202.21	8956953	08/10/2026	NYSE

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	08/07/2026	Restricted Stock Vesting	Issuer			1138	08/07/2026	Compensation

* 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
Brian Musfeldt 1400 Post Oak Boulevard. Suite 560 Houston TX 77056	Common	07/20/2026	996	6087.75

144: Remarks and Signature

Remarks	Sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution.
Date of Notice	08/10/2026
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/ Adam Gehring, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Brian Musfeldt
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)