Wolfram Ridder - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Wolfram Ridder has filed 1 SEC Form 4 filing across 1 company in the last 90 days.
Profile
Wolfram Ridder is Senior VP, Innovation & Gov. at MERCER INTERNATIONAL INC. (MERC). Ridder has reported 1 insider filing with the SEC since 2026. The most recent filing was in June 2026.
| Role | Senior VP, Innovation & Gov. |
|---|---|
| Notability | 28/100 |
Board memberships
- MERCER INTERNATIONAL INC.
Reported roles
- Senior VP, Innovation & Gov.
Awards & honors
- Position confirmed in SEC filing as Senior VP, Innovation & Gov at Mercer International Inc (as of 2026-06-05)
Trading Pattern
InsiderAlpha's records for Wolfram Ridder go back to 2026: 1 primary Form 4 filing, an average of 1.0 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 Wolfram Ridder 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, Innovation & Gov. at MERCER INTERNATIONAL INC. (MERC) - 1 filing, 2026
Companies - Last 90 Days
- MERCER INTERNATIONAL INC. (MERC) - 1 filing, last 2026-06-05
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Wolfram Ridder 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.
- Peter R. Kellogg - $1.17M of MERC open-market activity in the last 12 months
- Linda J. Welty - $31K of MERC open-market activity in the last 12 months
- Alice Laberge - $14K of MERC open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Caroline Young
- Jeffrey Yu
- George Raymond Zage III
- Payam Zamani
- Mahkam Zanganeh
- A.L. Sarroff Fund, LLC
- ABRAMS CAPITAL MANAGEMENT, L.P.
- Abu Dhabi Investment Authority
Frequently Asked Questions
Who is Wolfram Ridder?
Wolfram Ridder is Senior VP, Innovation & Gov. at MERCER INTERNATIONAL INC. (MERC). Ridder has reported 1 insider filing with the SEC since 2026. The most recent filing was in June 2026.…
How many SEC Form 4 filings has Wolfram Ridder submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Where can I see all of Wolfram Ridder'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 Wolfram Ridder profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.