Core Insights - Kopin (KOPN) and Nephros (NEPH) are rapidly moving stocks, with KOPN rising 60 positions and NEPH 52 positions in Barchart's Top 100 Stocks to Buy [1] - Kopin's stock has increased by 62% in the past month and 163% in 2025, attracting retail investors due to its penny stock status [2] - Nephros reached a 52-week high of $5.59, with a 377% appreciation over the past 36 months, outperforming Kopin's 253% return [3] Company Overview: Kopin (KOPN) - Kopin specializes in microdisplay technologies and optical systems, with applications in defense and medical sectors [4] - In 2024, 82% of Kopin's revenue, amounting to $50.3 million, came from defense industry customers, a significant increase from 56% in 2023 and 52% in 2022 [5] - The concentration of revenue sources is notable, with the top two customers accounting for 76% of its 2024 revenue, the largest being DRS Network & Imaging Systems, LLC at 65% [6]