For the first time, bitcoin miners have been able to signal support for Segregated Witness this past week. Developed as a soft fork, the proposed centerpiece of Bitcoin Core’s scalability roadmap requires 95 percent of all blocks within a single two week difficulty period to signal readiness for the change. If the threshold is reached, the solution is activated two weeks later, realizing an effective block size limit increase, a malleability fix and more.
Of all mining pools accounting for at least one percent of hash power on the network, four have been signaling support for Segregated Witness so far, together accounting for about 26 percent of all newly mined blocks.
Here is a brief overview.
AntPool (~19 percent hash power)
At the “Bitcoin Roundtable” in Hong Kong last February, Bitmain and AntPool representatives signed a letter supporting Segregated Witness, in return for a hard fork proposal to increase the block size limit from the Bitcoin Core