Marathon Digital Holdings has expanded its Bitcoin portfolio by acquiring 400 BTC for $46.3 million, bringing its total holdings to 53,250 BTC. This purchase, executed through FalconX, solidifies Marathon's position as the second-largest corporate Bitcoin holder. CEO Fred Thiel emphasized that this acquisition underscores the company's commitment to digital assets as a central strategy. The move reflects a growing trend among corporations, with notable investments from companies like Tesla and MicroStrategy.