April 26 (Reuters) - Wall Street’s three main indexes opened slightly higher on Monday, ahead of first-quarter results from big technology companies later this week. The Dow Jones Industrial Average rose 0.74 points, or 0.00%, at the open to 34,044.23. The S&P 500 opened higher by 4.86 points, or 0.12%, at 4,185.03, while the Nasdaq Composite gained 35.57 points, or 0.25%, to 14,052.38 at the opening bell. (Reporting by Shivani Kumaresan in Bengaluru; Editing by Sriraj Kalluvila)