AI giant Anthropic has confidentially filed for an initial public offering, adding fresh momentum to a surge of high-profile technology offerings that could reshape public markets. The Claude maker disclosed the confidential filing on Monday, as excitement builds around a new wave of mega-IPOs, following  SpaceX's blockbuster IPO plans and expectations of an  OpenAI debut. The wave of IPOs is sparking debate across Wall Street about what comes next for the industry's biggest players — and