STEM (NYSE: STEM) president receives major RSU and PSU equity awards

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

STEM, INC. reported that President, Software Products Matthew Tappin acquired equity-based compensation awards and settled a prior grant. On February 26, 2026, he received 25,800 restricted stock units (RSUs) and 17,200 performance stock units (PSUs), each representing the right to receive one share of common stock.

The RSUs vest in three nearly equal annual installments of 33%, 33%, and 34% beginning March 7, 2027. The PSUs vest in part only if the volume‑weighted average price of STEM common stock meets a stock price target over any 60 trading‑day period. On March 1, 2026, 670 RSUs from a 2022 grant converted on a one‑for‑one basis into 670 common shares, bringing his directly held common stock to 2,907 shares.

Insider Trade Summary

670 shares exercised/converted

Mixed 4 txns

Insider Tappin Matthew

Role President, Software Products

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unit	670	$0.00	--
Exercise	Common Stock, Par Value $0.0001 Per Share	670	$0.00	--
Grant/Award	Restricted Stock Unit	25,800	$0.00	--
Grant/Award	Performance Stock Unit	17,200	$0.00	--

Holdings After Transaction: Restricted Stock Unit — 0 shares (Direct); Common Stock, Par Value $0.0001 Per Share — 2,907 shares (Direct); Performance Stock Unit — 17,200 shares (Direct)

Footnotes (1)

Each restricted stock unit ("RSU") converted into a share of common stock on a one-for-one basis. Each restricted stock unit ("RSU") and performance stock unit ("PSU") represents a contingent right to receive one share of the Issuer's common stock. On February 26, 2026, the Reporting Person was granted 25,800 RSUs vesting in three nearly equal annual installments (33%, 33%, 34%), beginning on March 7, 2027. On February 26, 2026, the Reporting Person was granted 17,200 PSUs, a portion of which vests, if the volume-weighted average price of the Issuer's common stock for any consecutive sixty (60) trading-day period equals or exceeds a stock price target. On March 1, 2022, the reporting person was granted 2,679 RSUs vesting in four near equal annual installments, the fourth of which vested on March 1, 2026.

Form 4 Insider Transactions: What Each Field Means →

03/02/2026 - 07:32 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)
02/26/2026

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	03/01/2026		M		670	A	⁽¹⁾	2,907	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	⁽²⁾	02/26/2026		A		25,800		⁽³⁾	⁽³⁾	Common Stock, Par Value $0.0001 Per Share	25,800	$0	25,800	D
Performance Stock Unit	⁽²⁾	02/26/2026		A		17,200		⁽⁴⁾	⁽⁴⁾	Common Stock, Par Value $0.0001 Per Share	17,200	$0	17,200	D
Restricted Stock Unit	⁽¹⁾	03/01/2026		M			670	⁽⁵⁾	⁽⁵⁾	Common Stock, Par Value $0.0001 Per Share	670	$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. Each restricted stock unit ("RSU") and performance stock unit ("PSU") represents a contingent right to receive one share of the Issuer's common stock.

3. On February 26, 2026, the Reporting Person was granted 25,800 RSUs vesting in three nearly equal annual installments (33%, 33%, 34%), beginning on March 7, 2027.

4. On February 26, 2026, the Reporting Person was granted 17,200 PSUs, a portion of which vests, if the volume-weighted average price of the Issuer's common stock for any consecutive sixty (60) trading-day period equals or exceeds a stock price target.

5. On March 1, 2022, the reporting person was granted 2,679 RSUs vesting in four near equal annual installments, the fourth of which vested on March 1, 2026.

Remarks:

	/s/ Sarah Dunn, attorney-in-fact	03/02/2026
	** 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 equity awards did STEM (STEM) executive Matthew Tappin receive?

Matthew Tappin received significant equity awards: 25,800 restricted stock units (RSUs) and 17,200 performance stock units (PSUs). Each unit represents a contingent right to receive one share of STEM common stock, aligning his compensation with long-term shareholder value creation.

How do Matthew Tappin’s new STEM (STEM) RSU grants vest?

Tappin’s 25,800 RSUs vest in three nearly equal annual installments of 33%, 33%, and 34%. Vesting begins on March 7, 2027, creating a multi‑year incentive structure that rewards continued service and long‑term performance at STEM.

What conditions apply to Matthew Tappin’s STEM (STEM) PSU awards?

Tappin’s 17,200 PSUs vest only if a stock price performance condition is met. A portion vests when STEM’s volume‑weighted average share price equals or exceeds a specified target for any consecutive 60 trading‑day period, emphasizing performance-based compensation.

What happened with Matthew Tappin’s previously granted STEM RSUs?

On March 1, 2026, 670 RSUs from a March 1, 2022 grant vested and converted into 670 shares of STEM common stock. This was the fourth and final installment of that original 2,679‑RSU award vesting over four years.

How many STEM (STEM) common shares does Matthew Tappin now hold directly?

Following the March 1, 2026 RSU conversion, Tappin directly holds 2,907 shares of STEM common stock. This reflects the addition of 670 newly delivered shares from vested RSUs, as disclosed in the insider transaction report.