If you look up replacement stylus for at-440 it says atn150mlx will work. So yes I believe so.
audio technica AT-150 mlx stylus in AT-440 body
I've got a spare AT-150 mlx stylus and wonder if it will be OK in an AT-440 body. I'd really like to get hold of an AT-150 mlx body but think it will be easier to find an AT-440 body. The AT-440 is well known in England but unfortunately the AT-150 mlx is only available as an import from USA or Japan - unfortunately.