Summary
Updated Aug 31, 2026
Mary L. Frontczak is Chief Legal & Admin. Officer of COMPASS MINERALS INTERNATIONAL INC (CMP). 1 SEC Form 4 filing on record, dated 17 October 2024.
Recent Transactions
2Every recent SEC Form 4 transaction Mary L. Frontczak has reported, most recent first.
Other Insiders Active in the Same Sector
No other insider has filed at Mary L. Frontczak's companies, so these are insiders reporting open-market trades at other companies in the same sector.
- Robert J. Pagano Jr. - $5.26M of WTS open-market activity in the last 12 months
- Marshall D. Akins - $5.21M of CRS open-market activity in the last 12 months
- Stefan Becker - $5.05M of GLW open-market activity in the last 12 months
- J. Kent Masters - $5.02M of ALB open-market activity in the last 12 months
- John Z. Zhang - $4.96M of GLW open-market activity in the last 12 months
- Avery H. Nelson III - $4.94M of GLW 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 Mary L. Frontczak?
Mary L. Frontczak is a corporate insider, tracked as Chief Legal & Admin. Officer of COMPASS MINERALS INTERNATIONAL INC (CMP). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Mary L. Frontczak last file a Form 4?
The only primary Form 4 on record is dated 17 October 2024.
Where can I see all of Mary L. Frontczak'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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