3. MannKind Corp. (MNKD): Focuses on the discovery, development, and commercialization of therapeutic products for diabetes and cancer. Market cap at $1.02B, most recent closing price at $3.54.

Net institutional purchases in the current quarter at 13.2M shares, which represents about 8.67% of the company's float of 152.29M shares.

Over the last six months, insiders were net buyers of 39,997,650 shares, which represents about 26.26% of the company's 152.29M share float.

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