VANGUARD PORTFOLIO MANAGEMENT LLC purchased ~$5535M in Crown Castle Inc. stock
Crown Castle Inc. (CCI) · Data via SEC EDGAR Form 4
Price Performance · 10 days before → 90 days after trade
▲ = insider buy date
Trade Details · Public SEC Filing
Insider
VANGUARD PORTFOLIO MANAGEMENT LLC
Role
—
Transaction
Open-Market Purchase
Approx. Value
~$5535M
Trade Date
May 18, 2026
Company
Crown Castle Inc.
Ticker
CCISource
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.
~$5535M purchase
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.
4 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.
How good is VANGUARD PORTFOLIO MANAGEMENT LLC at picking stocks?
Full track record: win rate, average return, and performance vs S&P 500
VANGUARD PORTFOLIO MANAGEMENT LLC wasn't the only one buying.
4 insiders at Crown Castle Inc. traded within the same 30-day window.
See who else bought · FreeOn May 18, 2026, VANGUARD PORTFOLIO MANAGEMENT LLC — a corporate insider at Crown Castle Inc. — filed a Form 4 with the SEC disclosing an open-market purchase of approximately ~$5535M in Crown Castle Inc. (CCI) stock.
This transaction was part of a cluster — 4 insiders at Crown Castle Inc. made open-market purchases 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.
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 VANGUARD PORTFOLIO MANAGEMENT LLC 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 CCI Insider Activity
Stephens Kevin A
May 5, 2026
~$222K
VS
Adams Edward B JR
Feb 27, 2026
~$1.6M
STRONG
SCHLANGER DANIEL K
May 2, 2025
~$3.7M
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