STEM (NYSE: STEM) files Form 144 reporting sale of 300 vested shares

Rhea-AI Filing Summary

STEM submitted a Form 144 reporting a proposed sale of 300 common shares tied to restricted stock vesting on 02/27/2026 with the method listed as Issuer and designated as Compensation.

The filing also lists prior sales by Matthew Tappin: 522 shares on 02/19/2026 and 366 shares on 02/20/2026, with numeric values shown as 5847.50 and 4172.40 respectively.

Insights

Securities Counsel

Routine resale notice tied to vested compensation; prior small sales disclosed.

The filing lists a proposed sale of 300 common shares arising from restricted stock vesting on 02/27/2026, described as Issuer and Compensation. This indicates the filing documents an intended transfer following vesting.

Prior transactions by Matthew Tappin are listed: 522 shares on 02/19/2026 and 366 shares on 02/20/2026, with numeric entries 5847.50 and 4172.40 included in the table. Timing and cash‑flow qualifiers are those shown; subsequent filings may report settlement details.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	300	2901.48	8390208	03/03/2026	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	02/27/2026	Restricted Stock Vesting	Issuer			300	02/27/2026	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
Matthew Tappin 1400 Post Oak Boulevard. Suite 560 Houston TX 77056	Common	02/19/2026	522	5847.50
Matthew Tappin 1400 Post Oak Boulevard. Suite 560 Houston TX 77056	Common	02/20/2026	366	4172.40

144: Remarks and Signature

Remarks

Date of Notice

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does STEM's Form 144 report about the 300 shares?

The Form 144 reports a proposed sale of 300 common shares from restricted stock vesting on 02/27/2026. The filing lists the method as Issuer and classifies the shares as Compensation in the provided table.

Who sold shares in the past three months according to this filing?

The filing lists prior sales by Matthew Tappin: 522 shares on 02/19/2026 and 366 shares on 02/20/2026. Each sale row in the table includes numeric values shown as 5847.50 and 4172.40.

Are the 300 vested shares being sold by the company or an insider?

The 300 shares are shown under Securities To Be Sold with the method labeled Issuer and the reason Compensation, indicating they arise from restricted stock vesting and are reported as issuer‑related in the table.

Does the Form 144 disclose prices or proceeds for the past sales?

The table shows numbers adjacent to the past sales rows—5847.50 for 522 shares and 4172.40 for 366 shares—but the filing excerpt does not label those values explicitly as price or proceeds beyond their placement in the sales table.

What dates are tied to the transactions in this filing?

Key dates in the excerpt are the vesting/sale date 02/27/2026 for the 300 shares and prior sale dates 02/19/2026 and 02/20/2026 for Matthew Tappin's reported transactions, as listed in the table.