Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Donal L. Mulligan 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.
- Richard H. Zay - $605K of TNC open-market activity in the last 12 months
- James T. Glerum Jr. - $500K of TNC open-market activity in the last 12 months
- David W. Huml - $258K of TNC open-market activity in the last 12 months
- David Windley - $236K of TNC open-market activity in the last 12 months
- Carol S. Eicher - $194K of TNC open-market activity in the last 12 months
- Azita Arvani - $194K of TNC 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 Donal L. Mulligan?
Donal L. Mulligan is a corporate insider, tracked as Director of TENNANT CO (TNC). InsiderAlpha holds 7 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Donal L. Mulligan submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Donal L. Mulligan been buying or selling stock?
Recorded transactions: 4 open-market purchases ($1.30M) and 0 open-market sales across all tracked filings.
How accurate is Donal L. Mulligan's historical track record?
Across 3 tracked purchases, Donal L. Mulligan averaged +8.6% avg 30-day return with a 100% 30-day win rate. InsiderAlpha rates the track record at 4/5 stars.
Where can I see all of Donal L. Mulligan'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
Follow Donal L. Mulligan and every insider like them
A free account opens the full scored daily plan and every past day, a watchlist for any ticker, and 3 months of price history on every company page. No card.
Free plan available · Paid plans start with a 7-day free trial
