HLSQ ▼ -11.1% - Tessera Defense and Homeland Se $HLSQ - UPDATE -- Tessera Defense and Homeland Security Inc. Increases Equity Investment Stake in M.E.A. Testing Systems Tessera Defense and Homeland Security Inc. announced it is increasing its equity investment stake in M.E.A. Testing Systems, yet shares fell 11.1% today. The decline may reflect investor concerns about capital deployment or dilution associated with the expanded investment commitment. 16-SEP-2026 10:25 AM ET