1. Kempharm, Inc. (19 from 56 patents)

2. Zevra Therapeutics, Inc. (3 from 5 patents)

3. Merck + Co., Inc. (1 from 4,770 patents)

4. Isis Pharmaceuticals, Inc. (1 from 1,035 patents)

5. Shire LLC (1 from 35 patents)

6. New River Pharmaceuticals Inc. (1 from 9 patents)

7. Merck Sharp + Dohme Corp. (2,405 patents)

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