Matthew Tappin - 26 Feb 2026 Form 4 Insider Report for STEM, INC. (STEM)

Role
President, Software Products
Signature
/s/ Sarah Dunn, attorney-in-fact
Issuer symbol
STEM
Transactions as of
26 Feb 2026
Net transactions value
$0
Form type
4
Filing time
02 Mar 2026, 19:32:17 UTC
Previous filing
23 Feb 2026
Next filing
04 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Tappin Matthew President, Software Products 1400 POST OAK BOULEVARD, SUITE 560, HOUSTON /s/ Sarah Dunn, attorney-in-fact 02 Mar 2026 0001986259

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction STEM Common Stock, Par Value $0.0001 Per Share Options Exercise +670 +30% 2,907 01 Mar 2026 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction STEM Restricted Stock Unit Award $0 +25,800 $0.000000 25,800 26 Feb 2026 Common Stock, Par Value $0.0001 Per Share 25,800 Direct F2, F3
transaction STEM Performance Stock Unit Award $0 +17,200 $0.000000 17,200 26 Feb 2026 Common Stock, Par Value $0.0001 Per Share 17,200 Direct F2, F4
transaction STEM Restricted Stock Unit Options Exercise $0 -670 -100% $0.000000 0 01 Mar 2026 Common Stock, Par Value $0.0001 Per Share 670 Direct F1, F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Each restricted stock unit ("RSU") converted into a share of common stock on a one-for-one basis.
F2 Each restricted stock unit ("RSU") and performance stock unit ("PSU") represents a contingent right to receive one share of the Issuer's common stock.
F3 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.
F4 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.
F5 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.