Microsoft ranks among the largest holdings in most diversified mutual funds due to its $3+ trillion market cap and influence on tech-heavy indexes. This guide identifies funds where MSFT represents a substantial portion of your investment, matters for portfolio construction. We analyzed 2026 holdings data, expense ratios, and performance to find funds balancing Microsoft exposure with diversification. This matters if you want concentrated tech bets, passive index tracking, or strategic MSFT overweighting.