Brian Musfeldt - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 4, 2026
Brian Musfeldt has filed 1 SEC Form 4 filing across 1 company in the last 90 days - selling. Lifetime open-market sales: $6K.
Profile
Brian Musfeldt is the Chief Financial Officer at STEM, INC. (STEM). Musfeldt has reported 4 insider filings with the SEC since 2025. The most recent filing was in July 2026.
| Role | Chief Financial Officer |
|---|---|
| Notability | 34/100 |
Board memberships
- STEM, INC.
Reported roles
- Chief Financial Officer
Awards & honors
- Chief Financial Officer at Stem, Inc.
Trading Pattern
InsiderAlpha's records for Brian Musfeldt go back to 2025: 3 primary Form 4 filings, an average of 1.5 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Career & Filing History
Every role Brian Musfeldt has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- Chief Financial Officer at STEM, INC. (STEM) - 3 filings, 2025 to 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-07-21 | STEM | STEM, INC. | S - Open-market sale | 996 | $6.11 | $6K |
| 2026-07-21 | STEM | STEM, INC. | M - Option exercise | 3.4K | $6.26 | $21K |
Companies - Last 90 Days
- STEM, INC. (STEM) - 1 filing, last 2026-07-21
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Brian Musfeldt has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.
- Matthew Tappin - $198K of STEM open-market activity in the last 12 months
- Arun Narayanan - $73K of STEM open-market activity in the last 12 months
- Rahul Shukla - $60K of STEM open-market activity in the last 12 months
- Michael James Carlson - $34K of STEM open-market activity in the last 12 months
- Saul R. Laureles - $19K of STEM open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- BROADWOOD PARTNERS, L.P.
- Ronald W. Burkle
- BVF PARTNERS L P/IL
- de Retraite D'Hydro-Quebec Caisse
- Kevin T. Callahan
- Michael Cannon-Brookes
- CANTOR FITZGERALD & CO.
- Fitzgerald, L. P. Cantor
Frequently Asked Questions
Who is Brian Musfeldt?
Brian Musfeldt is the Chief Financial Officer at STEM, INC. (STEM). Musfeldt has reported 4 insider filings with the SEC since 2025. The most recent filing was in July 2026.…
How many SEC Form 4 filings has Brian Musfeldt submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Brian Musfeldt been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($6K) across all tracked filings.
Where can I see all of Brian Musfeldt's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
Open the live Brian Musfeldt profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.