[burkaman]

Technically a bank is a much larger shareholder (https://www.mazda.com/en/investors/stockinfo/situation/), but Mazda and Toyota have been collaborating for a long time with joint manufacturing (https://en.wikipedia.org/wiki/Mazda_Toyota_Manufacturing_USA) and technology sharing. Toyota has similar arrangements with other companies like Subaru and Suzuki.

[kenhwang]

That's a trust account though, they're just holding shares on behalf of fund managers or individuals. They also generally don't vote.

So for all intents and purposes, Toyota is the largest singular voting shareholder.