Matthew Lingenbrink - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Matthew Lingenbrink is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days. Lifetime open-market purchases: $29K.
Profile
Matthew Lingenbrink is a corporate insider at FITLIFE BRANDS, INC. (FTLF). Lingenbrink has reported 1 insider filing with the SEC since 2026. The most recent filing was in April 2026.
| Role | Insider |
|---|---|
| Notability | 20/100 |
Board memberships
- FITLIFE BRANDS, INC.
Trading Pattern
InsiderAlpha's records for Matthew Lingenbrink go back to 2026: 1 primary Form 4 filing, an average of 1.0 per year. The typical open-market purchase is $29K (1 buy totaling $29K). The largest single buy on record is $29K of FTLF in 2026. 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 Lingenbrink 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.
- Insider at FITLIFE BRANDS, INC. (FTLF) - 1 filing, 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-04-14 | FTLF | FITLIFE BRANDS, INC. | P - Open-market purchase | 3.0K | $9.76 | $29K |
Most Active Insiders Right Now
Matthew Lingenbrink 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 Lingenbrink?
Matthew Lingenbrink is a corporate insider at FITLIFE BRANDS, INC. (FTLF). Lingenbrink has reported 1 insider filing with the SEC since 2026. The most recent filing was in April 2026.…
Has Matthew Lingenbrink been buying or selling stock?
Recorded transactions: 1 open-market purchase ($29K) and 0 open-market sales across all tracked filings.
Where can I see all of Matthew Lingenbrink'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 Lingenbrink profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.