Intrusion Inc (INTZ) drops 19.21% Posted on May 04, 2021 By News Team Intrusion Inc (NASDAQ: INTZ) shares dropped -19.21% to end trading Monday at $14.80 per share – a net change of $-3.52. Shares traded between $18.43 and $14.63 throughout the day. 435129 shares of Intrusion Inc exchanged hands.