LINCOLN, Neb., Aug. 6, 2025 /PRNewswire/ — Nelnet (NYSE: NNI) today reported GAAP net income of $181.5 million, or $4.97 per share, for the second quarter of 2025, compared with GAAP net income of $45.1 million, or $1.23 per share, for the same period a year ago. Net income, excluding…