Matthew B. Sicinski - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Matthew B. Sicinski is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days.
Profile
Matthew B. Sicinski holds the role of Senior VP and CAO at Summit Midstream Corp (SMC). Sicinski has reported 2 insider filings with the SEC since 2026. The most recent filing was in March 2026.
| Role | Senior VP and CAO |
|---|---|
| Notability | 28/100 |
Board memberships
- Summit Midstream Corp
Reported roles
- Senior VP and CAO
Awards & honors
- Oversees accounting policy and financial reporting
- Ensures SEC compliance and internal control framework
- Leads corporate finance functions in the CAO capacity
Trading Pattern
InsiderAlpha's records for Matthew B. Sicinski go back to 2026: 2 primary Form 4 filings, an average of 2.0 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 Matthew B. Sicinski 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.
- Senior VP and CAO at Summit Midstream Corp (SMC) - 2 filings, 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-03-17 | SMC | Summit Midstream Corp | F - Tax withholding / forfeiture | 773 | $30.29 | $23K |
| 2026-03-17 | SMC | Summit Midstream Corp | M - Option exercise | 3.2K | - | |
| 2026-03-17 | SMC | Summit Midstream Corp | F - Tax withholding / forfeiture | 368 | $30.29 | $11K |
| 2026-03-17 | SMC | Summit Midstream Corp | M - Option exercise | 1.5K | - | |
| 2026-03-17 | SMC | Summit Midstream Corp | F - Tax withholding / forfeiture | 1.5K | $30.29 | $46K |
| 2026-03-17 | SMC | Summit Midstream Corp | M - Option exercise | 6.1K | - | |
| 2026-01-21 | SMC | Summit Midstream Corp | F - Tax withholding / forfeiture | 1.1K | $26.81 | $29K |
| 2026-01-21 | SMC | Summit Midstream Corp | M - Option exercise | 3.6K | - |
Most Active Insiders Right Now
Matthew B. Sicinski has no recent co-filers at the same companies, so here are the insiders with the largest open-market activity across the market in the last 90 days.
- MetLife Investment Management, LLC - $1600000.00B of FINS open-market activity in the last 90 days
- Magnetar Financial LLC - $16357.48B of CRWV open-market activity in the last 90 days
- Marianne Okland - $18.46B of STNG open-market activity in the last 90 days
- VisionWave Holdings, Inc. - $14.13B of SVRE open-market activity in the last 90 days
- Vanessa Allen Sutherland - $7.44B of PSX open-market activity in the last 90 days
- AI Alpine (Luxembourg) S.a.r.l. - $2.69B of INIO open-market activity in the last 90 days
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Neil Mehta
- Keith A. Meister
- MetLife Investment Management, LLC
- John Micek
- Andrew J. Mills
- Charles N. Mills
- Kevin J. Mills
- Mink Brook Asset Management LLC
Frequently Asked Questions
Who is Matthew B. Sicinski?
Matthew B. Sicinski holds the role of Senior VP and CAO at Summit Midstream Corp (SMC). Sicinski has reported 2 insider filings with the SEC since 2026. The most recent filing was in March 2026.…
Where can I see all of Matthew B. Sicinski'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 Matthew B. Sicinski profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.