The director's buy is a modest positive signal but too small to move a mega-cap REIT. Monitor for additional insider buying, especially from C-suite executives, which would strengthen the signal. The broader insider trend (3 sells vs. 1 buy over 30 days) warrants caution. Next catalyst is the Q3 2026 earnings release.
Price Chart
Executive Summary
Director Kalathur Rajesh made a single open-market purchase of $501K worth of AMT shares at $177, a modest 0.0006% of the $83.1B market cap. While a lone insider buy is a standalone bullish signal per academic literature, the dollar amount is trivial relative to company size and the buyer is a director, not C-suite. The historical calibration shows past AMT reports have underperformed at T+20, and the score-6 calibration cell shows a negative net alpha, warranting a conservative score. This is a minor positive signal but not a material event for a mega-cap REIT.
Key Financial Metrics
Key Facts
- Director Kalathur Rajesh purchased 2,829 shares at $177.00 for a total of $500,733 on 2026-08-21.
- The purchase represents approximately 0.0006% of AMT's $83.1B market cap, well below the 0.1% threshold for material insider activity.
- This is a single insider buy, not a cluster; the insider is a director, not a C-suite executive.
- AMT has 83% analyst bullish consensus (24 buy/5 hold/0 sell), but recent insider activity over 30 days shows 3 sells totaling $1.2M vs. 1 buy of $501K.
Financial Impact
Director purchased $501K of AMT common stock at $177/share, a trivial 0.0006% of market cap.
Risk Factors
- Insider selling has outnumbered buying 3:1 by dollar value over the past 30 days.
- Historical calibration shows past AMT reports have underperformed at T+20, with a negative net alpha of -3.04% vs SPY.
- A single director buy at 0.0006% of market cap carries minimal informational content for a $83B company.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| INSIDER-BUY Data (Synthetic) | 0001053507-26-000139 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 14, 2026 17d ago | 8-K | $177.71 $175.25 | ▼ −1.38% | ▼ −3.51% | $162.01 (−8.84%) |
Sep 9, 2026 23d ago | 424B5 | $175.43 $176.39 | ▲ +0.55% | ▲ +1.20% | $162.01 (−7.65%) |
Aug 25, 2026 5w ago | Insider Buy | $178.57 $176.02 | ▼ −1.43% | ▼ −0.89% | $162.01 (−9.28%) |
Aug 1, 2026 8w ago | Institutional Cluster | $173.00 $169.11 | ▲ +2.25% | ▲ +4.28% | $162.01 (+6.36%) |
Jul 31, 2026 9w ago | Insider Cluster | $173.36 $172.54 | ▼ −0.47% | ▼ −3.98% | $162.01 (−6.55%) |
Jul 28, 2026 9w ago | 8-K | $171.50 $173.00 | ▲ +0.87% | ▼ −1.39% | $162.01 (−5.54%) |
Jun 4, 2026 17w ago | 8-K | $194.12 $187.18 | ▼ −3.58% | ▼ −4.14% | $162.01 (−16.54%) |
May 27, 2026 18w ago | 8-K | $184.86 $182.05 | ▼ −1.52% | ▼ −1.99% | $162.01 (−12.36%) |
May 21, 2026 19w ago | 8-K | $183.73 $186.93 | ▲ +1.74% | ▲ +0.08% | $162.01 (−11.82%) |
May 19, 2026 19w ago | 424B5 | $182.23 $184.86 | ▲ +1.44% | ▼ −0.85% | $162.01 (−11.10%) |
US Market Status
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