Langwell Dennis J. purchased ~$143K in Safety Insurance Group, Inc. stock
Safety Insurance Group, Inc. (SAFT) · Data via SEC EDGAR Form 4
Price Performance · 10 days before → 90 days after trade
▲ = insider buy date
90-day return
+7.9%vs SPY +7.5%
Trade Details · Public SEC Filing
Insider
Langwell Dennis J.
Role
—
Transaction
Open-Market Purchase
Approx. Value
~$143K
Trade Date
Aug 11, 2025
Company
Safety Insurance Group, Inc.
Ticker
SAFTSource
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.
~$143K purchase
A meaningful investment of personal capital. The average insider purchase is around $150K, putting this in the typical range for serious positions.
+7.9% in 90 days (S&P 500: +7.5%)
This trade beat the S&P 500 by 0.5 percentage points over 90 days. We track performance on every insider trade so you can see who consistently outperforms.
How good is Langwell Dennis J. at picking stocks?
Full track record: win rate, average return, and performance vs S&P 500
On August 11, 2025, Langwell Dennis J. — a corporate insider at Safety Insurance Group, Inc. — filed a Form 4 with the SEC disclosing an open-market purchase of approximately ~$143K in Safety Insurance Group, Inc. (SAFT) stock.
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, SAFT returned +7.9% versus +7.5% for the S&P 500 over the same period.
VeritySignals Conviction Analysis
Full Conviction Analysis
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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
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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.
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