Stem (STEM) insider Matthew Tappin plans sale of 1,881 common shares

Rhea-AI Filing Summary

Stem, Inc. insider Matthew Tappin filed a notice of proposed sale of 1,881 shares of common stock through Fidelity Brokerage Services LLC on July 29, 2026 on the NYSE, with an indicated value of $9,565.45.

The shares relate to restricted stock vesting from the issuer as compensation dated July 28, 2026. The filing also lists a prior sale of 996 common shares on July 2, 2026 for $7,718.90 during the preceding three months.

Key Figures

Shares proposed for sale: 1,881 shares Proposed sale value: $9,565.45 Prior sale shares: 996 shares +3 more

6 metrics

Shares proposed for sale 1,881 shares Common stock to be sold on July 29, 2026

Proposed sale value $9,565.45 Value associated with 1,881 common shares

Prior sale shares 996 shares Common stock sold on July 2, 2026

Prior sale value $7,718.90 Value for 996 common shares sold during past 3 months

Planned sale date 07/29/2026 Intended transaction date on NYSE

Restricted stock vesting date 07/28/2026 Compensation-related vesting of common stock

Key Terms

restricted stock vesting, compensation, securities sold during the past 3 months, brokerage services

4 terms

restricted stock vesting financial

"Common | 07/28/2026 | 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

"1881 | 07/28/2026 | Compensation"

securities sold during the past 3 months regulatory

"144: Securities Sold During The Past 3 Months"

brokerage services financial

"Common | Fidelity Brokerage Services LLC 900 Salem Street"

Brokerage services are firms or online platforms that act as the bridge between individual or institutional investors and financial markets, handling the buying, selling and safekeeping of stocks, bonds and other securities. They also provide tools like trading platforms, market research, account administration and optional credit for trading on margin; these features and fees directly affect an investor’s costs, access to opportunities and the speed and reliability of executing trades—like choosing the right driver and route for an important trip.

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 07/29/2026 - 03:23 PM Accepted by SEC EDGAR 07/29/2026 - 03:20 PM Learn about SEC filing dates

FAQ

What does Stem (STEM) disclose in Matthew Tappin’s Form 144 filing?

The filing shows a proposed sale of 1,881 shares of Stem common stock, valued at $9,565.45, related to vested restricted stock compensation and expected to be sold on July 29, 2026 through Fidelity Brokerage Services.

How many Stem (STEM) shares is Matthew Tappin planning to sell?

Matthew Tappin plans to sell 1,881 shares of Stem common stock. These shares are tied to restricted stock vesting on July 28, 2026 and are scheduled for sale on July 29, 2026 on the NYSE.

What was the value of the proposed share sale reported by Stem (STEM)?

The proposed sale is valued at $9,565.45 for 1,881 common shares. This reflects the value reported in connection with the intended NYSE transaction to be executed through Fidelity Brokerage Services LLC on July 29, 2026.

Does Stem (STEM) report any prior Stem share sales by Matthew Tappin in the last 3 months?

Yes. The filing lists a prior sale of 996 shares of Stem common stock on July 2, 2026 for $7,718.90, disclosed under securities sold during the past three months.

How are the Stem (STEM) shares being sold by Matthew Tappin held and executed?

The 1,881 shares of Stem common stock are to be sold through Fidelity Brokerage Services LLC, at its Smithfield, Rhode Island location, with the intended transaction occurring on the NYSE on July 29, 2026.

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	1881	9565.45	8956953	07/29/2026	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	07/28/2026	Restricted Stock Vesting	Issuer			1881	07/28/2026	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

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)