STEM (NYSE: STEM) insider files to sell 2,712 common shares

Rhea-AI Filing Summary

An affiliate of STEM, identified as Matthew Tappin, filed a notice of proposed sale of common stock. The filing covers up to 2,712 common shares held at Fidelity Brokerage Services, related to restricted stock vesting on 08/07/2026 and categorized as Compensation. The issuer’s securities are listed on the NYSE. Over the prior three months, Tappin reported additional sales of 996 common shares for aggregate consideration of 7,718.90 on 07/02/2026 and 1,881 shares for 9,565.45 on 07/29/2026.

Key Figures

Proposed shares to be sold: 2,712 shares Recent sale on 07/02/2026: 996 shares; 7,718.90 aggregate consideration Recent sale on 07/29/2026: 1,881 shares; 9,565.45 aggregate consideration +1 more

4 metrics

Proposed shares to be sold 2,712 shares Common stock covered in the Form 144 and Securities To Be Sold section

Recent sale on 07/02/2026 996 shares; 7,718.90 aggregate consideration Common stock sold during the past 3 months

Recent sale on 07/29/2026 1,881 shares; 9,565.45 aggregate consideration Common stock sold during the past 3 months

Exchange listing NYSE Exchange identified in the securities information for common stock

Key Terms

Restricted Stock Vesting, Securities To Be Sold, Compensation, Fidelity Brokerage Services LLC

4 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.

Securities To Be Sold financial

"144: Securities To Be Sold"

Compensation financial

"2712 | 08/07/2026 | Compensation"

Fidelity Brokerage Services LLC financial

"Common | Fidelity Brokerage Services LLC 900 Salem Street"

FAQ

What does STEM’s Form 144 filing disclose?

The Form 144 filing for STEM discloses a proposed sale of up to 2,712 common shares. These shares relate to restricted stock vesting on 08/07/2026 and are categorized as Compensation, with the issuer’s securities listed on the NYSE.

How many STEM (STEM) shares are covered by the planned sale?

The filing covers a proposed sale of up to 2,712 common shares of STEM. This amount appears both in the securities information section and in the “Securities To Be Sold” section tied to restricted stock vesting on 08/07/2026.

What recent STEM (STEM) share sales has Matthew Tappin reported?

Matthew Tappin reported sales of 996 STEM common shares for aggregate consideration of 7,718.90 on 07/02/2026. He also reported sales of 1,881 common shares for 9,565.45 on 07/29/2026, both listed in the past 3 months section.

What is the source of the STEM (STEM) shares to be sold?

The shares to be sold are linked to Restricted Stock Vesting dated 08/07/2026. The transaction is described as issued by the Issuer and categorized under Compensation, indicating the shares arose from an equity compensation award.

Which broker is involved in the proposed STEM (STEM) share sale?

The proposed sale involves Fidelity Brokerage Services LLC, listed with an address in Smithfield, Rhode Island. This broker appears in the securities information section associated with the 2,712 common shares referenced in the Form 144 filing.

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Available on EDGAR 08/10/2026 - 05:47 PM Accepted by SEC EDGAR 08/10/2026 - 05:46 PM 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
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	2712	14780.67	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			2712	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
Matthew Tappin 1400 Post Oak Boulevard. Suite 560 Houston TX 77056	Common	07/02/2026	996	7718.90
Matthew Tappin 1400 Post Oak Boulevard. Suite 560 Houston TX 77056	Common	07/29/2026	1881	9565.45

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)