Own Red-Hat, thus major contributions to Wayland, GNOME, GCC and Java, at very least.

Have their own Java implementation, with capabilities like AOT before OpenJDK got started on Leyden, or even Graal existed, for years had extensions for value types (nowadays dropped), and alongside Azul, cluster based JIT compiler that shares code across JVM instances.

IBM i and z/OS are still heavely deployed in many organisations, alongside Aix, and LinuxONE (Linux running on mainframes and micros).

Research in quantum computing, AI, design processes, one of the companies that does huge amounts of patents per year across various fields.

And yes a services company, that is actually a consortium of IBM owned companies many of each under a different brand (which is followed by "an IBM company").