Lam Research Corp

Graham earnings-power value (normalized NOPAT)$47.97 – $58.31 / 股

Normalized NOPAT = average operating margin over the years shown × latest-year revenue × (1 − normalized tax); then + D&A − maintenance capex (write A). Unlevered (pre-interest, attributable to all capital). Capitalized at the 9–11% rate band (read as a WACC proxy). Enterprise → equity bridge applied: + cash − total debt.

年份：2025, 2024, 2023, 2022, 2021

v1 简化：Maintenance capex (ok) deducted in full cash (write A): EPV = (NOPAT + D&A − maintenance capex) / WACC; no tax shield on the capex term. Capex doubled within two years (AI-hog rule): maintenance capex floored at the D&A sustaining proxy (the growth-capex spike is not treated as maintenance). Share-based compensation is left as a real expense (not added back).

Buffett owner-earnings value$42.33 – $51.73 / 股

Owner earnings = average net income + average D&A − maintenance capex (zero-growth floor; no ΔNWC). Levered (starts from net income, already after interest — an equity-holder stream). Capitalized at the 9–11% rate band (read as a cost-of-equity proxy). No enterprise→equity bridge: the capitalized result is already equity value (subtracting debt would double-count interest).

年份：2025, 2024, 2023, 2022, 2021

v1 简化：Owner earnings = net income + D&A − maintenance capex (ok); the working-capital change is excluded (maintenance ΔNWC ≈ 0; growth ΔNWC is carried in growth value, not double-counted). Capex doubled within two years (AI-hog rule): maintenance capex floored at the D&A sustaining proxy (the growth-capex spike is not treated as maintenance). One-time items are not separately normalized (multi-year averaging smooths them partially). Share-based compensation is left as a real expense (not added back); see the SBC/OE disclosure. Capitalized at the 9–11% band as a cost-of-equity proxy; no leverage premium applied (net cash or debt within the no-charge range).