Who were the earliest investors in Circle?

In October 2013, Circle announced the completion of a $9 million Series A funding round. The participants included:

Breyer Capital

Accel Partners

General Catalyst Partners

Note the name Breyer Capital; the firm's investment in Circle not only began with the Series A but has continued throughout:

In March 2014, Series B funding of $17 million: Breyer Capital continued to lead the investment.

In April 2015, Series C funding of $50 million: Breyer Capital participated in the follow-on investment.

With early entry and long-term holding, Breyer Capital has achieved significant returns from its investment in Circle, especially after Circle became a leading global stablecoin platform (USDC issuer).

However, in Breyer Capital's portfolio, Circle is not the only case, nor is it even the most dazzling one.