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Psychemedics Corp

Hair-based drug testing laboratory services

Recent Activity

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2007Q4

1 sell

Bill & Melinda Gates Foundation TrustEXIT

-222.7K shares

Bill & Melinda Gates Foundation TrustEXIT

-222.7K shares

2007Q3

1 buy

Bill & Melinda Gates Foundation TrustNEW

+222.7K shares

Bill & Melinda Gates Foundation TrustNEW

+222.7K shares