Gilliam Joseph E, President & COO of Glaukos Corporation (GKOS), has demonstrated a clear selling bias in recent transactions, with $6.39 million in total sales outweighing $827,700 in purchases across 26 reported trades. The activity has been concentrated entirely in GKOS shares, with no transactions in other companies. Recent filings show six consecutive sales between February and March 2026, totaling approximately $2.08 million, including a $777,439 disposition on March 24 and a $518,363 sale the same day. Earlier in the year, Gilliam executed a notable series of transactions on January 21-22, 2026, including four sales aggregating $1.5 million alongside purchases worth $1.41 million—the only buy activity in the dataset.
The pattern shows accelerating divestment in 2026, with all six recent transactions being sales and no purchases recorded after January. Earlier activity includes a $1.74 million sale in November 2025 and smaller option exercises with subsequent sales throughout late 2025. Transaction codes indicate Gilliam frequently acquired shares through derivative transactions (Code M) before selling (Code S), particularly in January 2026 when $1.41 million in option exercises preceded $1.5 million in sales. The absence of any purchases after January—coupled with multiple seven-figure sales—suggests a sustained reduction in GKOS holdings over the past five months.
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