Donal L. Mulligan
Director · TENNANT CO
IndividualBuying only
- 2025
- Aug 13, 2026
- 7
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 in TNC purchases and sales in the last 12 months
- James T. Glerum Jr. - $500K in TNC purchases and sales in the last 12 months
- David W. Huml - $258K in TNC purchases and sales in the last 12 months
- David Windley - $236K in TNC purchases and sales in the last 12 months
- Patrick E. Allen - $208K in TNC purchases and sales in the last 12 months
- Carol S. Eicher - $194K in TNC purchases and sales in the last 12 months
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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.
