Heartland Advisors, an investment management company, released its third-quarter 2025 investor letter for its “Heartland Opportunistic Value Equity Strategy.” A copy of the letter can be downloaded here. In Q3, trends from Q2 continued, with rising optimism about the AI boom and increased electricity demand driving large- and mid-cap growth stocks to new highs, regardless of business model quality or valuation. The strategy returned 4.65% in the quarter, compared to a 5.63% return for the Russell 3000 Value ...