Bamboo's $700m IPO pays the sponsors, not the insurer

White Mountains Insurance Group will sell into an initial public offering that raises as much as $700 million, and Bamboo Insurance Services will get none of it. The Utah-based home insurer controlled by CVC Capital Partners plans to market 35 million shares at $18 to $20 each — all of them secondary, per its filing with the US Securities and Exchange Commission — with JPMorgan Chase and Morgan Stanley leading. The shares are expected to trade on the New York Stock Exchange under the symbol BMB; pricing is expected September 22, according to a marketing presentation seen by Bloomberg News.

When funds advised by CVC bought control last year at a $1.75 billion valuation, the Bermuda holding company kept roughly a 15 per cent stake valued at $250 million; at the midpoint of the new range, which puts Bamboo's fully diluted market value at $3.08 billion, that same stake would be worth close to $460 million — roughly double White Mountains' mark, if it is intact at pricing.

The owners have been paid once already this year: in June, Bamboo amended its term loan and borrowed an additional $150 million, distributing the proceeds to equity owners, a debt-funded payout that landed three months before an equity sale in which the company again takes nothing.

The growth story has to carry the multiple, and the first half does not: Bamboo earned $13.8 million in the six months to June 30 on revenue of $173.4 million, against $23.7 million on $123.9 million a year earlier, revenue up 40 per cent and net income down about 42 per cent. Set against $3.08 billion of fully diluted value, that first half annualises to roughly 110 times earnings, a figure that assumes the second half looks nothing like the first.

The captive's route back to Bermuda is the sharper detail. Bamboo is moving its captive insurer, Bamboo Captive, from Arizona back to the island in the third quarter of 2026, having been established there in 2020 as Ide8 Ltd and shifted to Arizona in late 2024 after White Mountains acquired Bamboo. The parent already runs two Bermuda special purpose insurers, Greenshoots Re and Greengrove Re, capitalised with $400 million and $100 million of third-party funds. As PWD has argued, jurisdiction risk is migrating into the capital formula, which makes a domicile move a capital-cost decision dressed as housekeeping.

Bamboo is not alone at the door: specialty home insurer Orion180 filed for an IPO on August 20, and Hellman & Friedman-backed broker Hub International filed confidentially on June 26. The pattern across insurance M&A is that strategics and public balance sheets have replaced rollup sponsors as buyers of first resort — and Bamboo runs that shift in reverse, with sponsors using the public market as the exit. September 22 will be billed as a verdict on the homeowners cycle; with $150 million already drawn out through the loan and the equity proceeds going entirely to shareholders, it is at least as much a test of how fast a sponsor can leave a book it took control of a year ago.