Adding Concise Background:
"Amid rising competition in the technology sector, Marathon now has a 4.6 percent stake in PLX, signaling a strategic move to strengthen its position in the market, according to Bloomberg."

Sentiment Highlighting:
This development indicates a positive sentiment as Marathon's increased stake in PLX reflects confidence in the company's potential and an optimistic outlook for the technology sector.

Synthesizing Enhanced Sentence:
"In a strategic move amidst rising competition, Marathon now holds a 4.6 percent stake in PLX, expressing confidence in the company's potential, as reported by Bloomberg."