Matthew Tappin

Insider Reports History

Reporting-owner location: San Francisco, CA
Latest reporting-owner signature: /s/ Sarah Dunn, attorney-in-fact
Source: Latest parsed Forms 3/4/5 signature
Transaction source note: Rows are grouped by transaction date from the original SEC filing. Open the aggregated insider activity page to review issuer-level activity across dates.

Reported holdings for Matthew Tappin

Form 4 holding President, Software Products

STEM, INC.

Security class: Restricted Stock Unit
Shares / value: 1,459
Estimated value: $527,418
Report date: 07 Mar 2026
Price: $1.32
Ownership: Direct
Underlying class: Common Stock, Par Value $0.0001 Per Share
Underlying amount

Form 4 holding President, Software Products

STEM, INC.

Security class: Common Stock, Par Value $0.0001 Per Share
Shares / value: 2,823
Estimated value: $30,573
Report date: 11 Mar 2026
Price: $10.83
Ownership: Direct

Form 4 holding President, Software Products

STEM, INC.

Security class: Performance Stock Unit
Shares / value: 17,200
Estimated value
Report date: 26 Feb 2026
Price
Ownership: Direct
Underlying class: Common Stock, Par Value $0.0001 Per Share
Underlying amount

Form 4 holding President, Software Products

STEM, INC.

Security class: Stock Options
Shares / value: 5,500
Estimated value
Report date: 30 Jun 2025
Price
Ownership: Direct
Underlying class: Common Stock, Par Value 0.0001 Per Share
Underlying amount

Insider Reports Filed by Matthew Tappin

4 STEM

STEM, INC.

Report period: 11 Mar 2026
Transactions: 1
Transaction value: -$4,354
Accepted by SEC: 13 Mar 2026, 07:48
Role: President, Software Products
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 07 Mar 2026
Transactions: 3
Transaction value: -$7,284
Accepted by SEC: 10 Mar 2026, 17:13
Role: President, Software Products
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 03 Mar 2026
Transactions: 2
Transaction value: -$4,751
Accepted by SEC: 04 Mar 2026, 17:20
Role: President, Software Products
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 26 Feb 2026
Transactions: 4
Transaction value: $0
Accepted by SEC: 02 Mar 2026, 19:32
Role: President, Software Products
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 20 Feb 2026
Transactions: 1
Transaction value: -$4,172
Accepted by SEC: 23 Feb 2026, 17:50
Role: President, Software Products
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 19 Feb 2026
Transactions: 1
Transaction value: -$5,899
Accepted by SEC: 19 Feb 2026, 17:42
Role: President, Software Products
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 15 Feb 2026
Transactions: 2
Transaction value: $0
Accepted by SEC: 18 Feb 2026, 20:16
Role: President, Software Products
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 11 Nov 2025
Transactions: 1
Transaction value: -$169,637
Accepted by SEC: 24 Nov 2025, 09:21
Role: President, Software Products
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 07 Nov 2025
Transactions: 3
Transaction value: -$98,950
Accepted by SEC: 12 Nov 2025, 16:24
Role: President, Software Products
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 28 Jul 2025
Transactions: 2
Transaction value: $0
Accepted by SEC: 30 Jul 2025, 16:05
Role: PRESIDENT, SOFTWARE DIVISION
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 30 Jun 2025
Transactions: 3
Transaction value: $0
Accepted by SEC: 02 Jul 2025, 18:40
Role: PRESIDENT, SOFTWARE DIVISION
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 29 May 2025
Transactions: 4
Transaction value: -$9,895
Accepted by SEC: 18 Jun 2025, 19:14
Role: President, Software Division
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 06 Mar 2025
Transactions: 6
Transaction value: -$7,646
Accepted by SEC: 17 Mar 2025, 16:30
Role: President, Software Division
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 19 Feb 2025
Transactions: 3
Transaction value: -$5,095
Accepted by SEC: 21 Feb 2025, 20:31
Role: President, Software Division
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 01 Nov 2024
Transactions: 1
Transaction value: $0
Accepted by SEC: 01 Nov 2024, 16:04
Role: President, Software Division
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 28 May 2024
Transactions: 1
Transaction value: -$1,832
Accepted by SEC: 30 May 2024, 16:31
Role: President, Asset Management
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 28 May 2024
Transactions: 1
Transaction value: $0
Accepted by SEC: 28 May 2024, 19:25
Role: President, Asset Management
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 24 May 2024
Transactions: 2
Transaction value: $0
Accepted by SEC: 28 May 2024, 16:49
Role: President, Asset Management
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 19 Mar 2024
Transactions: 1
Transaction value: -$48,485
Accepted by SEC: 20 Mar 2024, 18:07
Role: President, Asset Management
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 08 Mar 2024
Transactions: 1
Transaction value: -$54,529
Accepted by SEC: 12 Mar 2024, 16:14
Role: President, Asset Management
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 05 Mar 2024
Transactions: 1
Transaction value: -$9,247
Accepted by SEC: 07 Mar 2024, 17:04
Role: President, Asset Management
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 01 Mar 2024
Transactions: 4
Transaction value: -$14,196
Accepted by SEC: 05 Mar 2024, 16:25
Role: President, Asset Management
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 20 Feb 2024
Transactions: 1
Transaction value: -$20,914
Accepted by SEC: 21 Feb 2024, 17:07
Role: President, Asset Management
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 15 Feb 2024
Transactions: 4
Transaction value: -$33,608
Accepted by SEC: 20 Feb 2024, 16:48
Role: President, Asset Management
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 14 Feb 2024
Transactions: 1
Transaction value: -$14,351
Accepted by SEC: 16 Feb 2024, 17:12
Role: President, Asset Management
Next action: Open filing details

4 STEM

STEM, INC.

Report period: 31 Dec 2023
Transactions: 3
Transaction value: -$18,537
Accepted by SEC: 03 Jan 2024, 17:23
Role: President, Asset Management
Next action: Open filing details

3 STEM

STEM, INC.

Report period: 13 Jul 2023
Transactions: 0
Transaction value: $0
Accepted by SEC: 24 Jul 2023, 16:40
Role: President, Asset Management
Next action: Open filing details

We use cookies and similar technologies to provide certain features, enhance the user experience and, if you allow them, measure engagement and deliver advertising. Analytics and marketing storage stay off until you grant consent. By clicking on "Agree and continue", you declare your consent to the use of the selected optional cookies. to update or revoke optional consent for future visits. For more information, see our Privacy Policy .