The WestJet Strike Isn't the Onex Story Anymore

A competitor headline asks whether the WestJet flight attendant strike should reshape how Onex investors view its airline exposure. The answer is no - because Onex's WestJet exposure was already reshaped a year ago, and nobody outside the press release inbox noticed.

Onex sold a 25% stake in WestJet to Delta Air Lines and Korean Air in October 2025. The $550 million deal recovered Onex's entire equity investment from the 2019 buyout at a 2.1 times multiple on the original cost, according to CIBC analyst Nik Priebe. Onex retained a 75% economic interest, yes, but the headline risk is no longer the headline number.

The strike itself was brutal in real time. WestJet canceled 615 flights and stranded roughly 250,000 passengers over Canada's Civic Holiday weekend, the busiest travel period of the summer. But it lasted about 24 hours before CUPE - the union representing 4,400 flight attendants - and WestJet reached a tentative deal on Monday morning. Flights are already resuming. The financial hit to WestJet is real but bounded: lost revenue over a single weekend, rebooking costs, customer goodwill erosion. Not a balance-sheet event.

And here is what matters for the Onex investor who actually reads the financial statements: WestJet is no longer the center of gravity in that portfolio.

Convex, the specialty insurer Onex acquired for $7 billion, has taken over. Convex delivered $711 million in net income for fiscal 2025, up 40% year-over-year, with a 20% return on equity. Onex's consolidated net earnings for the same period were $617 million, with diluted EPS of $8.88. Convex's earnings alone exceeded the entire group's bottom line, meaning the rest of the portfolio after corporate costs contributed modestly. That is not a rounding detail - it means the airline, the logistics companies, and the direct investment book now orbit a specialty insurance business.

Investing capital per share grew 10% to $124.70 in 2025. Fee-generating assets under management rose 24% to $43.9 billion. Management has already flagged that Convex will continue earnings and tangible book value growth in 2026, even as the property-and-casualty insurance rate environment softens.

The market is still pricing Onex as an infrastructure-and-airline holding company with insurance as a bright spot. But Convex is now the business. The rest is the dividend check.

What this means for the person holding ONEX is straightforward. If you bought the stock because Onex owns WestJet, the strike just reminded you how cyclical and labor-sensitive that business is - and the tentative deal reminds you that the outcome is already sorted. The real question is whether you understand what Onex actually looks like now.

Onex reports Q2 2026 results on August 13. That is when the next checkpoint arrives. The setup entering that print is a firm whose earnings are increasingly driven by insurance underwriting and asset management fees, not airline ticket revenue or aircraft utilization. A roughly 24-hour labor dispute at the airline doesn't change the trajectory of the insurer.

The risk to this view is not the airline. It's whether Convex's growth rate normalizes in 2026 as the acquisition matures and the P&C insurance market softens. Management has acknowledged the rate environment is easing. If that 40% earnings growth from Convex drops sharply next year, the rerating narrative weakens. That is the real variable worth watching, not whether 4,400 flight attendants show up for their shift on a Monday morning.

The WestJet strike is a story for WestJet investors. Onex investors should be looking at the August 13 earnings print and asking whether Convex's run rate is accelerating, decelerating, or holding steady. That is where the next 12 months of value get decided.