STEM (STEM) executive Matthew Tappin converts 1,253 RSUs into common stock

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

STEM, INC. executive Matthew Tappin, President, Software Products, exercised restricted stock units into common shares. On February 15, 2026, 1,253 RSUs converted into 1,253 shares of common stock at a price of $0.00 per share on a one-for-one basis.

These RSUs were part of a 3,684-unit grant awarded on February 15, 2023, which vested in three equal annual installments; the third installment vested on February 15, 2026. Following the conversion, Tappin directly owned 3,125 common shares.

Insider Trade Summary

1,253 shares exercised/converted

Mixed 2 txns

Insider Tappin Matthew

Role President, Software Products

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unit	1,253	$0.00	--
Exercise	Common Stock, Par Value $0.0001 Per Share	1,253	$0.00	--

Holdings After Transaction: Restricted Stock Unit — 0 shares (Direct); Common Stock, Par Value $0.0001 Per Share — 3,125 shares (Direct)

Footnotes (1)

Each restricted stock unit ("RSU") converted into a share of common stock on a one-for-one basis. On February 15, 2023 the reporting person was granted 3,684 RSUs vesting in three equal annual installments, the third of which vested on February 15, 2026.

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 02/18/2026 - 08:16 PM

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

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)
02/15/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock, Par Value $0.0001 Per Share	02/15/2026		M		1,253	A	⁽¹⁾	3,125	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Unit	⁽¹⁾	02/15/2026		M			1,253	⁽²⁾	⁽²⁾	Common Stock, Par Value $0.0001 Per Share	1,253	$0	0	D

Explanation of Responses:

1. Each restricted stock unit ("RSU") converted into a share of common stock on a one-for-one basis.

2. On February 15, 2023 the reporting person was granted 3,684 RSUs vesting in three equal annual installments, the third of which vested on February 15, 2026.

Remarks:

	/s/ Sarah Dunn, attorney-in-fact	02/18/2026
	** 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.

Source: View Original Filing on SEC EDGAR

FAQ

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

STEM reported that executive Matthew Tappin exercised restricted stock units into common shares. On February 15, 2026, 1,253 RSUs converted into 1,253 shares of common stock at zero cost, increasing his directly owned common stock position to 3,125 shares.

How many restricted stock units did Matthew Tappin convert at STEM (STEM)?

Matthew Tappin converted 1,253 restricted stock units into 1,253 common shares. Each RSU converted on a one-for-one basis at a price of $0.00 per share as part of a scheduled vesting from a prior equity grant.

What is the origin of the RSUs Matthew Tappin exercised at STEM (STEM)?

The RSUs came from a 3,684-unit grant awarded to Matthew Tappin on February 15, 2023. This grant vested in three equal annual installments, with the third and final tranche vesting on February 15, 2026 before conversion.

How many STEM (STEM) common shares does Matthew Tappin own after this Form 4?

After the RSU conversion, Matthew Tappin directly owns 3,125 common shares of STEM. This reflects the addition of 1,253 shares from the February 15, 2026 RSU conversion, as reported in the non-derivative transaction section.

What type of Form 4 transaction did STEM (STEM) disclose for Matthew Tappin?

The Form 4 shows an exercise or conversion of derivative securities, not an open-market trade. Restricted stock units were converted into common stock on a one-for-one basis, coded as an “M” transaction for derivative exercise or conversion.

Was there a purchase or sale of STEM (STEM) shares by Matthew Tappin?

The filing reflects an acquisition through derivative exercise, not a market buy or sell. Restricted stock units converted into common shares at zero cost, classified as an exercise or conversion rather than a traditional purchase or sale.