Summary
Updated Aug 31, 2026
John P. Zimmer is EVP, Treasurer, Secretary, CFO of CORE MOLDING TECHNOLOGIES INC (CMT). 3 SEC Form 4 filings on record going back to 2024, most recently on 12 May 2025. Most recent open-market trade: sold $37K of CMT on 27 November 2024. Lifetime open-market sales: $350K.
Recent Transactions
6Every recent SEC Form 4 transaction John P. Zimmer has reported, most recent first.
Trading Pattern
InsiderAlpha's records for John P. Zimmer go back to 2024: 3 primary Form 4 filings, 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.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies John P. Zimmer files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- David L. Duvall - $1.02M of CMT open-market activity in the last 12 months
- Thomas R. Cellitti - $242K of CMT open-market activity in the last 12 months
- Matthew Jauchius - $119K of CMT open-market activity in the last 12 months
- Ralph O. Hellmold - $110K of CMT open-market activity in the last 12 months
- Michael James Gayford - $10K of CMT open-market activity in the last 12 months
- Eric Palomaki - $8K of CMT open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is John P. Zimmer?
John P. Zimmer is a corporate insider, tracked as EVP, Treasurer, Secretary, CFO of CORE MOLDING TECHNOLOGIES INC (CMT). InsiderAlpha holds 3 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did John P. Zimmer last file a Form 4?
The most recent primary Form 4 on record is dated 12 May 2025, one of 3 filings going back to 2024.
Has John P. Zimmer been buying or selling stock?
Recorded transactions: 0 open-market purchases and 3 open-market sales ($350K) across all tracked filings.
Where can I see all of John P. Zimmer'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.
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