Tappin Matthew 4

4 · STEM, INC. · Filed Mar 2, 2026

AI-generated summary of this filing

Updated Mar 3, 2026

STEM President Matthew Tappin Receives Awards, Converts RSUs

What Happened

Matthew Tappin, President, Software Products at STEM, Inc. (STEM), received equity awards and completed a conversion of vested restricted stock units (RSUs). On Feb 26, 2026 he was granted 25,800 RSUs (no cash cost) and 17,200 performance stock units (PSUs) (no cash cost). On Mar 1, 2026, 670 RSUs converted into 670 shares and the filing also reports a same-day disposition of 670 shares at $0.00. The grants and conversions are reported at $0 cash value in the filing.

Key Details

Transaction dates: Grants on 2026-02-26; conversion/disposition on 2026-03-01. Filing date: 2026-03-02 (appears timely).
Prices/values: Grants reported at $0.00; conversion and disposition reported at $0.00 (no cash proceeds).
Shares after transaction: Not specified in the provided excerpt of the filing.
Relevant footnotes from the filing:
- F1: RSUs convert one-for-one into common shares.
- F2: RSUs and PSUs each represent a contingent right to one share.
- F3: 25,800 RSUs vest in three nearly equal annual installments (33% / 33% / 34%) beginning March 7, 2027.
- F4: 17,200 PSUs vest only if a 60‑trading‑day VWAP stock price target is met.
- F5: 670 shares converted on Mar 1, 2026 relate to the final tranche of RSUs granted Mar 1, 2022.
Filing timeliness: Form 4 filed 2026-03-02 covering Feb 26 and Mar 1 events; this filing date is within the usual two business-day window.

Context

RSU conversion: Converting RSUs to shares is a routine vesting event (derivative conversion). The filing reports the converted 670 shares and a same-day disposition at $0.00; filings that report $0 proceeds for a disposition frequently reflect shares withheld or surrendered to satisfy tax withholding or similar obligations, though the form does not explicitly state the reason here.
PSUs are performance-based and only result in shares if the company meets the prescribed VWAP hurdle for the defined period; those shares are not immediately issued unless targets are met.

Form 4

Period: 2026-02-26

President, Software Products

Transactions

Exercise/Conversion
Common Stock, Par Value $0.0001 Per Share
[F1]
2026-03-01+670→ 2,907 total
Award
Restricted Stock Unit
[F2][F3]
2026-02-26+25,800→ 25,800 total
→ Common Stock, Par Value $0.0001 Per Share (25,800 underlying)
Award
Performance Stock Unit
[F2][F4]
2026-02-26+17,200→ 17,200 total
→ Common Stock, Par Value $0.0001 Per Share (17,200 underlying)
Exercise/Conversion
Restricted Stock Unit
[F1][F5]
2026-03-01−670→ 0 total
→ Common Stock, Par Value $0.0001 Per Share (670 underlying)

Footnotes (5)

[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.

Signature

/s/ Sarah Dunn, attorney-in-fact|2026-03-02

1 file