STEM (STEM) executive sells 366 shares in open-market trade

Rhea-AI Filing Summary

STEM, Inc. executive Matthew Tappin, President, Software Products, reported an open-market sale of common stock. On February 20, 2026, he sold 366 shares of STEM common stock at $11.40 per share. After this transaction, he directly owned 2,237 shares of STEM common stock.

Insider Trade Summary

Net Seller: 366 shares ($4,172)

Net Sell 1 txn

Insider Tappin Matthew

Role President, Software Products

Sold 366 shs ($4K)

Type	Security	Shares	Price	Value
Sale	Common Stock, Par Value $0.0001 Per Share	366	$11.40	$4K

Holdings After Transaction: Common Stock, Par Value $0.0001 Per Share — 2,237 shares (Direct)

Footnotes (1)

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Tappin Matthew

(Last) (First) (Middle)

1400 POST OAK BOULEVARD

SUITE 560

(Street)

HOUSTON TX 77056

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
STEM, INC. [ STEM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President, Software Products

3. Date of Earliest Transaction (Month/Day/Year)
02/20/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, Par Value $0.0001 Per Share	02/20/2026		S		366	D	$11.4	2,237	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

	/s/ Sarah Dunn, attorney-in-fact	02/23/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did STEM (STEM) report for Matthew Tappin?

STEM reported that executive Matthew Tappin completed an open-market sale of common stock. He sold 366 shares of STEM common stock on February 20, 2026, in a transaction reported on Form 4 as a sale in the open market or a private transaction.

How many STEM (STEM) shares did Matthew Tappin sell and at what price?

Matthew Tappin sold 366 shares of STEM common stock at a price of $11.40 per share. The transaction was classified as an open-market or private sale, as disclosed in the Form 4 insider trading report for February 20, 2026.

What is Matthew Tappin’s role at STEM (STEM) in this Form 4 filing?

In this Form 4, Matthew Tappin is identified as an officer of STEM, serving as President, Software Products. The filing indicates he is not a director and not a ten percent owner, but reports this sale in his capacity as a company officer.

How many STEM (STEM) shares does Matthew Tappin own after the sale?

Following the reported sale, Matthew Tappin directly owns 2,237 shares of STEM common stock. The Form 4 indicates this as his total direct ownership after the February 20, 2026 open-market sale of 366 shares at $11.40 per share.

Was the STEM (STEM) insider transaction a buy or a sell?

The insider transaction was a sell. The Form 4 lists transaction code “S” and describes it as a sale in the open market or a private transaction, with Matthew Tappin disposing of 366 shares of STEM common stock on February 20, 2026.