SCALF THOMAS R sold ~$2.5M in Donaldson Company, Inc. stock
Donaldson Company, Inc. (DCI) · President · Data via SEC EDGAR Form 4
Price Performance · 10 days before → 90 days after trade
▲ = insider buy date
90-day return
+0.7%vs SPY +2.5%
Trade Details · Public SEC Filing
Insider
SCALF THOMAS R
Role
President
Transaction
Open-Market Sale
Approx. Value
~$2.5M
Trade Date
Mar 5, 2025
Company
Donaldson Company, Inc.
Ticker
DCISource
SEC EDGAR Form 4
Why This Trade Stands Out
Strong conviction signal
Scored above average across multiple factors. Roughly 15% of insider trades qualify as Strong.
~$2.5M sale
Trades over $1M are rare. When insiders put this much of their own money on the line, they tend to have high conviction in their company's direction.
President
Corporate insiders must file trades with the SEC within 2 business days. Their unique access to non-public information makes these filings valuable data points.
2 insiders traded in the same window
When multiple insiders independently buy within 30 days, it's called a cluster. Studies show clustered insider purchases outperform solo trades significantly, because several people with inside knowledge are reaching the same conclusion.
+0.7% in 90 days (S&P 500: +2.5%)
This trade underperformed the S&P 500 by 1.8 percentage points. Not every insider trade wins. We track all of them so you can focus on the insiders with the best records.
How good is SCALF THOMAS R at picking stocks?
Full track record: win rate, average return, and performance vs S&P 500
SCALF THOMAS R wasn't the only one selling.
2 insiders at Donaldson Company, Inc. traded within the same 30-day window.
See who else bought · FreeOn March 5, 2025, SCALF THOMAS R — President of Donaldson Company, Inc. — filed a Form 4 with the SEC disclosing an open-market sale of approximately ~$2.5M in Donaldson Company, Inc. (DCI) stock.
This transaction was part of a cluster — 2 insiders at Donaldson Company, Inc. made open-market sales within the same 30-day window. Cluster activity from multiple independent insiders is one of the most studied patterns in insider trading research.
Under Section 16(a) of the Securities Exchange Act of 1934, corporate insiders must report all open-market stock transactions to the SEC within two business days. These filings — known as Form 4s — are publicly available on the SEC's EDGAR database. VeritySignals filters and scores the full Form 4 stream to surface high-conviction signals like this one.
In the 90 days following this trade, DCI returned +0.7% versus +2.5% for the S&P 500 over the same period.
VeritySignals Conviction Analysis
Full Conviction Analysis
Sign up free to see signal strength details, or upgrade for the full 15-factor breakdown.
Get notified the next time SCALF THOMAS R trades
Free alerts · No credit card · Instant notification
All data sourced from publicly available SEC Form 4 filings via EDGAR · Not financial advice · Past performance does not guarantee future results.
At a Glance
More DCI Insider Activity
Owens James
Apr 14, 2026
~$1.8M
STRONG
Owens James
Apr 14, 2026
~$638K
STRONG
Owens James
Apr 14, 2026
~$589K
STRONG
Owens James
Apr 13, 2026
~$527K
STRONG
How to Read Insider Trades
What is this?
When company executives buy or sell their own stock, they must report it to the SEC within 2 days. These public filings reveal what the people who know the company best are doing with their own money.
Why does it matter?
Insiders can sell for many reasons (taxes, diversification, expenses), but they generally only buy for one: they think the stock is going up. That's why insider purchases are more predictive than sales.
What makes a trade "strong"?
We score trades on 15+ factors: the insider's role (CEO > director), trade size relative to their salary, whether other insiders also bought (clusters), and historical accuracy of the insider.
Never miss a signal
Get notified when high-conviction insiders buy. Free account, no credit card.
Sign up free