APi Group Corp (APG) is overvalued and Mastec Inc (MTZ) is slightly undervalued.
Against our estimates of intrinsic value, MTZ trades at the wider discount: a margin of safety of +8%, against -242% for APG.
Values as of the 22 Sept 2026 close.
Discounting its cash flows at 10.7% (average of 2 methods) values the shares at $11.03; the price of $37.76 is 242% above that value, and 71% of that value comes from beyond year five.
Leak Score 0/100 on 2 of 12 signals
Discounting its cash flows at 12.4% (average of 3 methods) values the shares at $240.05; the price of $221.69 is 8% below that value, and 67% of that value comes from beyond year five.
Leak Score 41/100 on 9 of 12 signals
| Metric | APG | MTZ |
|---|---|---|
| Verdict | Overvalued | Slightly undervalued |
| Price | $37.76 | $221.69 |
| Intrinsic value | $11.03 | $240.05 |
| Margin of safety | -242% | +8% |
| Leak Score | 0/100 (2/12) | 41/100 (9/12) |
| Market cap | $16.5B | $17.8B |
| Revenue growth, 5 years | 17.1% | 17.7% |
| Operating margin | 6.4% | 5.2% |
| Net margin | -3.2% | 3.1% |
| Return on equity | 10.3% | 15.4% |
| Debt to equity | 1.09 | 0.93 |
| P/E | — | 35.3x |
| Forward P/E | 19.0x | 17.6x |
| P/B | 4.7x | 5.0x |