COF and C are Buffett's .COF is also a favorite of board director Chris Davis. C and COF are too big for Ted and Todd as they were purchased in the multi-billions too.

Well I disagree with you about Capital One but like I said you may be correct about Citi. Jane Fraser mentioned speaking with Buffett a few times, FWIW.

But 12.5 million shares of COF at $100 a share is not too large a position for Todd Combs and he is an expert on Capital One.

Warren and Todd both use the same broker to execute their trades - WallachBeth Capital - so it is hard to tell which trades belong to Warren vs Todd if they are not obvious by their size. Ted Weschler almost always uses Glenn Eagle Wealth so it is easier to tell which trades are his.

Ted and Todd manage a lot of capital these days. I'm not sure how much but a lot of it is the subsidiary pension funds and not BRK shareholder capital - half the DaVita is pension fund money for instance. They are also not subject to any limits on concentration - they can put their entire portfolios in one stock if they wanted to. Just like Warren would want if their positions were reversed.