Tenable prices upsized $730M convertible note offering at 40% premium

What's the deal? Tenable priced $725 million in 0.25% convertible senior notes due 2031, upsizing from a planned $650 million offering. The cybersecurity company sold the notes privately to qualified institutional buyers, with an option for purchasers to buy up to $75 million more.

The terms: The notes carry a conversion price of about $44.84 per share — a 40% premium over Tenable's $32.03 closing price on September 10. Interest is payable semiannually starting March 15, 2027, and the sale is expected to close September 15.

What's the money for? Tenable expects net proceeds of roughly $705.6 million. It plans to spend $58.1 million on capped call transactions, repurchase about $170.5 million of its common stock, repay term loans under its senior secured credit facility, and fund general corporate purposes, which may include acquisitions or further buybacks.

What's the endgame? Tenable describes itself as an exposure management company, helping organisations find and fix cybersecurity weaknesses. The capped call transactions are designed to reduce potential dilution to shareholders when the notes convert.

The signal: At $725 million, Tenable's raise sits in the 92nd percentile of post-IPO convertible rounds over the trailing 48 months, based on a sample of 1,834 deals. The low 0.25% coupon and steep conversion premium reflect an appetite among institutional investors for cheap capital that mature software companies can use to fund buybacks and deals.

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