Richard Pzena ( Trades, Portfolio )'s recent transaction involving NOV Inc shares reflects a strategic adjustment within the firm's value-driven investment portfolio. While the reduction in NOV's stake is noteworthy, the company's solid financial metrics and favorable GF Score suggest that it remains an attractive investment for those with a long-term perspective. As the oil and gas industry evolves, Pzena Investment Management's stake in NOV Inc will continue to be an area of interest for value investors.