The sheer size and concentration of Cascade's buying over a 6-day window is a strong bullish signal from a sophisticated 10% owner. However, given the model's 0% T+20 win rate on prior RSG bullish calls, traders should treat this as a notable but not definitive catalyst. Monitor for any 8-K or press release from RSG in the coming days that might explain the buying (e.g., M&A, large contract win, or earnings pre-announcement). If RSG reports earnings or guidance within 30 days, the cross-filing actuarial verdicts suggest this insider cluster amplifies the impact of earnings-related filings.
Price Chart
Executive Summary
Cascade Investment, L.L.C., a 10% owner of Republic Services, executed a massive open-market buying spree totaling approximately $316M over six trading days (Aug 19-26, 2026), representing ~0.47% of the company's $67.1B market cap. This is a highly material insider conviction buy from a major shareholder, signaling strong confidence in RSG's near-term prospects, though the historical win rate on prior RSG bullish calls is 0% at T+20, tempering the signal's reliability.
Key Financial Metrics
Key Facts
- Cascade Investment (10% owner) purchased ~1.4M shares of RSG for ~$316M across 26 open-market trades from Aug 19-26, 2026.
- Total purchase value of $316M equals ~0.47% of RSG's $67.1B market cap, placing it in the 'significant' proportionality band (0.5-2%).
- The buying was concentrated in the $216-$224 price range, with the largest single-day purchases on Aug 20 ($46.8M), Aug 21 ($42.2M), Aug 24 ($67.2M), Aug 25 ($59.8M), and Aug 26 ($60.9M).
- Cascade is a 10% owner, not a C-suite insider; the insider-buy literature's strongest signals come from CEO/CFO purchases, but a 10% owner's multi-hundred-million-dollar buy is still a powerful signal.
- Historical performance on prior RSG bullish calls shows 0% win rate at T+20 (n=3 settled), with avg alpha of -3.25% vs SPY, suggesting the model has over-scored RSG in the past.
Financial Impact
Cascade Investment purchased ~$316M of RSG common stock, representing ~0.47% of market cap.
Risk Factors
- Historical calibration shows prior RSG bullish calls underperformed SPY by -3.25% at T+20, suggesting the market may already price in insider buying.
- Cascade is a 10% owner, not management; their buying could be portfolio rebalancing rather than a signal about near-term operational performance.
- No accompanying 8-K or press release explains the buying, leaving the catalyst ambiguous.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| INSIDER-BUY Data (Synthetic) | 0001104659-26-103265 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 14, 2026 17d ago | Insider Buy | $223.04 $213.88 | ▼ −4.11% | ▼ −6.23% | $207.51 (−6.96%) |
Sep 10, 2026 22d ago | Insider Buy | $221.08 $218.93 | ▼ −0.97% | ▼ −0.47% | $207.51 (−6.14%) |
Sep 3, 2026 29d ago | Insider Buy | $225.12 $222.74 | ▼ −1.06% | ▲ +0.09% | $207.51 (−7.82%) |
Sep 1, 2026 4w ago | Insider Buy | $223.29 $222.47 | ▼ −0.37% | ▼ −0.45% | $207.51 (−7.07%) |
Aug 28, 2026 4w ago | Insider Buy | $220.92 $221.63 | ▲ +0.32% | ▲ +0.46% | $207.51 (−6.07%) |
Aug 24, 2026 5w ago | Insider Buy | $223.08 $220.92 | ▼ −0.97% | ▼ −1.44% | $207.51 (−6.98%) |
Aug 20, 2026 6w ago | Insider Buy | $219.50 $219.27 | ▼ −0.10% | ▼ −1.22% | $207.51 (−5.46%) |
Aug 18, 2026 6w ago | Insider Buy | $216.97 $220.96 | ▲ +1.84% | ▲ +2.04% | $207.51 (−4.36%) |
Aug 14, 2026 6w ago | Insider Buy | $215.26 $223.08 | ▲ +3.63% | ▲ +4.82% | $207.51 (−3.60%) |
Aug 12, 2026 7w ago | Insider Buy | $214.26 $221.04 | ▲ +3.16% | ▲ +3.61% | $207.51 (−3.15%) |
US Market Status
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