Thurmond Mark C.

Thurmond Mark C., Co-Chief Executive Officer of Tenable Holdings (TENB), has demonstrated a consistent pattern of selling activity based on SEC Form 4 filings, with no recorded purchases across 38 transactions. All recent trades involve TENB, with sales totaling approximately $1.74 million in aggregate value. The most notable transactions occurred in February 2026, including a single-day sale worth $223,991 on February 25 and multiple sales on February 23 ranging from $6,002 to $274,394. Earlier activity in November 2025 followed a similar trend, with four sales on November 24 totaling roughly $176,422, including individual transactions of $54,236, $46,121, $47,893, and $28,171. The filings indicate that Thurmond’s transactions are exclusively dispositional, with no offsetting buys—a pattern that suggests ongoing divestment rather than accumulation. The sales appear structured, often involving multiple smaller transactions clustered on the same day, as seen on February 23, when seven sales were executed with values spanning from $6,002 to $274,394. While the "F" transaction codes denote sales to cover tax obligations, the absence of open-market purchases ("P" codes) reinforces the directional bias toward reducing holdings. The lack of recent activity beyond February 2026 leaves open whether this trend will continue or pause in subsequent disclosures.