KIRR MARBACH & CO LLC /IN/

MasTec remains Kirr Marbach & Co's largest position at 9.4% of its $593.8 million, 57-name book, but the share-flow data shows it was meaningfully trimmed this quarter: share count fell 17% — a genuine $11.0 million reduction, the largest real trim in the portfolio — even as the position's dollar value rose $4.1 million because the stock rallied hard enough to mask the sale. Exxon Mobil saw a similar-direction but compounding move: shares cut 57% (a real $5.5 million reduction) alongside a falling stock price, for a full $7.9 million value decline. On the buy side, StandardAero grew 18% in shares (a genuine $1.0 million addition), and Moog and Generac both saw smaller real increases. CarMax was the only meaningful full exit ($5.2 million), while Boot Barn arrived as the one genuinely new position ($5.7 million).