Sec Form 4/A Filing - Musfeldt Brian @ STEM, INC. - 2025-07-17

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

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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Musfeldt Brian 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) Chief Financial Officer (Last) (First) (Middle) 1400 POST OAK BOULEVARD, SUITE 560 3. Date of Earliest Transaction (MM/DD/YY) 07/17/2025 (Street) HOUSTON, TX77056 4. If Amendment, Date Original Filed (MM/DD/YY) 08/19/2025 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 of Derivative Security: 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 Restricted Stock Unit ( 1 ) 07/17/2025 A 2,500 ( 2 ) ( 2 ) Common Stock, Par Value $0.0001 Per Share 2,500 $ 0 2,500 ( 3 ) D Performance Stock Unit ( 1 ) 07/17/2025 A 6,750 ( 4 ) ( 4 ) Common Stock, Par Value $0.0001 Per Share 6,750 $ 0 6,750 ( 5 ) D Stock Option $ 9.27 07/17/2025 A 1,250 ( 6 ) 07/17/2035 Common Stock, Par Value $0.0001 Per Share 1,250 $ 0 1,250 ( 3 ) D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Musfeldt Brian 1400 POST OAK BOULEVARD SUITE 560 HOUSTON, TX77056 Chief Financial Officer Signatures /s/ Sarah Dunn, attorney-in-fact 10/02/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Each restricted stock unit ("RSU") and performance stock unit ("PSU") represents a contingent right to receive one share of the Issuer's common stock. ( 2 )On July 17, 2025, the Reporting Person was granted 2,500 RSUs vesting 100% on August 7, 2027, subject to the Reporting Person's continued service to the Issuer through the vesting date. ( 3 )3. This grant was inadvertently omitted from the original Form 4. ( 4 )On July 17, 2025, the Reporting Person was granted 6,750 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 )This amendment corrects an error in the original Form 4, which reported a grant of 5,500 PSUs instead of 6,750 PSUs. ( 6 )On July 17, 2025, the Reporting Person was granted 1,250 stock options vesting 100% on August 7, 2027, subject to the Reporting Person's continued service to the Issuer through the vesting date.

Remarks: The original Form 4, filed on August 19, 2025, is being amended by this Form 4 amendment to (i) report grants of RSUs and stock options that were inadvertently omitted in the original Form 4 and (ii) correct the number of PSUs granted.

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.
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