BlackRock Boosts Tenable Stake to 17.5%, Led by iShares Small-Cap ETF

BlackRock, Inc. disclosed an increased ownership stake in cybersecurity firm Tenable Holdings, Inc.

An amended Schedule 13G filing dated September 4, 2026, details the new position.

BlackRock now holds 19,326,921 shares of the company's common stock.

This holding represents a 17.5% stake in Tenable.

BlackRock maintains sole dispositive power over the entire reported position.

The iShares Core S&P Small-Cap ETF, managed by BlackRock, accounts for a significant portion of these shares.

This specific ETF holds more than 5% of Tenable's total outstanding common stock.