Gridiron Capital, a private equity firm, agreed to invest in Cubii, a creator of innovative fitness equipment. Financial terms were not disclosed. "Cubii has seen tremendous growth the last few years because we make products that are effective and accessible. We picked Gridiron as a partner to take Cubii to the next level, not only because of their invaluable experience, but because their empathy and culture aligned with Cubii and what makes this company special," Arnav Dalmia, Cubii CEO.