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TNC

TENNANT CO

Industrials Refrigeration & Service Industry Machinery Market cap: $1.1B All insider activity → Quote and statistics → Sign in to watch TNC Sign in to set a price alert

66

Insider Score Band 60–79

Research score, not a recommendation.

Total bought$1.3M6 Form 4 purchases

Distinct insiders3open-market buyers

Lead insiderHuml David W.CEO

Cluster window2026-02-26 → 2026-03-02closed

Market data

Live quote and chart from Yahoo Finance, loaded through this server. Insider purchases are marked on the chart.

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Why this score

Research score: a weighted blend of the five factors, times the routine and offering discounts, minus the selling penalty.

Breadth number & diversity of participating insiders

37%

Seniority executive rank of buyers (CEO/CFO/Director)

87%

Commitment purchase size relative to company & holdings

81%

Context buying into stock weakness signals conviction

76%

Timing coordinated purchases within a tight window

99%

Routine-purchase discount × 1.00

Company-type / offering discount × 1.00

Net insider selling penalty − 7

Why are they buying?

No explanation has been generated for this cluster. The filings in the table below are the primary evidence.

Stock Price & Insider Purchase History

Daily close price with open-market insider purchases plotted over time

Loading price history…

Transactions

6 Form 4 trades · 3 insiders Sign in to download CSV

Purchases in this cluster, grouped by insider, largest first
Date	Insider	Role	Shares	Price	Value	Filing
2026-02-26 → 2026-02-27	Mulligan Donal L history of Mulligan Donal L's purchases	Director	8,000	$63.02 avg	$504.1K
2026-02-26	Mulligan Donal L		5,000	$63.86	$319.3K	SEC filing for Mulligan Donal L (opens in a new tab)
2026-02-27	Mulligan Donal L		3,000	$61.61	$184.8K	SEC filing for Mulligan Donal L (opens in a new tab)
2026-03-02	Glerum James T Jr. history of Glerum James T Jr.'s purchases	Director	8,163	$61.25	$500.0K	SEC filing for Glerum James T Jr. (opens in a new tab)
2026-02-26	Huml David W. history of Huml David W.'s purchases	CEO	4,000	$64.39 avg	$257.5K
2026-02-26	Huml David W.		175	$65.48	$11.5K	SEC filing for Huml David W. (opens in a new tab)
2026-02-26	Huml David W.		1,225	$65.01	$79.6K	SEC filing for Huml David W. (opens in a new tab)
2026-02-26	Huml David W.		2,600	$64.02	$166.5K	SEC filing for Huml David W. (opens in a new tab)
Total					$1.3M

Other buying runs at TNC

A run ends after a pause in the buying, so one company can have several. Returns are the stock's return minus its benchmark's (IWM for small companies, SPY otherwise), from the first open after the run became a cluster. Past results, not a forecast.

After this run became a cluster: 21 days +14.2%63 days +25.3%126 days -1.0%

Other insider buying runs at this company, newest first, with the return against the benchmark that followed
Window	Insiders	Total	Score	21 days	63 days	126 days	Status
2026-08-12 → 2026-08-31	3	$849.2K	54	–	–	–	active