Michael F. Marino III - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 4, 2026
Michael F. Marino III is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days. Lifetime open-market sales: $1K.
Profile
Michael F. Marino III serves as Chief Legal Officer & Corp Sec of OptiNose, Inc. (OPTN). Marino has reported 1 insider filing with the SEC since 2024. The most recent filing was in December 2024.
| Role | Chief Legal Officer & Corp Sec |
|---|---|
| Notability | 34/100 |
Board memberships
- OptiNose, Inc.
Reported roles
- Chief Legal Officer & Corp Sec
Trading Pattern
InsiderAlpha's records for Michael F. Marino III go back to 2024: 1 primary Form 4 filing, an average of 0.3 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 Michael F. Marino III 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 Legal Officer & Corp Sec at OptiNose, Inc. (OPTN) - 1 filing, 2024
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2024-12-18 | OPTN | OptiNose, Inc. | S - Open-market sale | 3.0K | $0.44 | $1K |
Most Active Insiders Right Now
Michael F. Marino III 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.
- Magnetar Financial LLC - $8.53B of CRWV open-market activity in the last 90 days
- VisionWave Holdings, Inc. - $7.98B of SVRE 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
- SGF FANG Holdings, LP - $2.04B of FANG open-market activity in the last 90 days
- BCP 8 Holdings Mozart Manager L.L.C. - $1.22B of MDLN open-market activity in the last 90 days
- BX Mozart ML-2 Holdco L.P. - $1.22B of MDLN open-market activity in the last 90 days
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Andrew J. Mills
- Charles N. Mills
- Mink Brook Asset Management LLC
- Shankh Mitra
- MITSUI SUMITOMO INSURANCE CO LTD
- Arturo R. Moreno
- Matthew T. Moroun
- Dustin A. Moskovitz
Frequently Asked Questions
Who is Michael F. Marino III?
Michael F. Marino III serves as Chief Legal Officer & Corp Sec of OptiNose, Inc. (OPTN). Marino has reported 1 insider filing with the SEC since 2024. The most recent filing was in December 2024.…
Has Michael F. Marino III been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($1K) across all tracked filings.
Where can I see all of Michael F. Marino III'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 Michael F. Marino III profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.