KE

Kevin Casteleijn

Substack

@kevincasteleijn

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kevincasteleijn.substack.com/@kevincasteleijn

Bio

Kevin Casteleijn is an active investor with five years of experience, currently completing a Master's degree in Financial Management in the Netherlands. Through his Substack publication, Casteleyn Partnership, he shares in-depth research and valuation updates on companies such as Markel, guided by a philosophy of "patient capital, driven by the discipline of learning." 网络评价:Markel深度研究+估值更新

Ideas

2 Ideas

ADYEN.ASAdyen2026-02-13
Analysis

Adyen H2 2025 and Full Year Update

Despite 20% stock price drop, maintains long-term bullish view emphasizing land-and-expand strategy and strong customer growth.

MKLMarkel Group Inc.2026-02-04
Analysis

Markel full year 2025 update + valuation

Markel's insurance segment is poised for improved profitability after exiting the reinsurance business. The stock appears undervalued, with significant capacity for share buybacks, positioning it as a long-term compounder despite potential headwinds in investment income from lower interest rates.