Following are all the current official statements of the biggest exchanges and wallets regarding the hard-fork in alphabetical order. (Bitcoin versus Bitcoin Cash)
We are updating the list constantly as we acquire new information regarding the matter. Stay tuned and keep your BTC safe.
BITFINEX
https://www.bitfinex.com/posts/212
BITHUMB
http://www.trustnodes.com/2017/07/25/kraken-south-koreas-bithumb-will-list-bitcoin-cash
BitMEX
https://blog.bitmex.com/site_announcement/policy-on-bitcoin-hard-forks/
Bitstamp
https://www.bitstamp.net/article/bitcoin-hard-fork-our-position/
BITTREX
https://support.bittrex.com/hc/en-us/articles/115000808991-Statement-on-Bitcoin-Cash-BCC-
BTCPOP
https://blog.btcpop.co/2017/07/19/preparation-for-hard-forks/
Coinbase
https://blog.coinbase.com/update-for-customers-with-bitcoin-stored-on-coinbase-99e2d4790a53
CoinFloor
http://blog.coinfloor.co.uk/post/163379984881/coinfloors-policy-with-respect-to-bitcoin-and
CRYPTOPIA
https://www.cryptopia.co.nz/News
GDAX
https://blog.gdax.com/uahf-a703b6a13115
GEMINI
https://gemini.com/blog/information-related-to-geminis-policy-on-an-upcoming-chain-split/
HitBTC
https://hitbtc.com/faq/bccf-on-hitbtc
Huobi
https://www.huobi.com/p/content/notice/getNotice?id=624
itBit
https://www.itbit.com/blog/update-itbits-protocol-for-the-upcoming-bitcoin-cash-hard-fork
Kraken
http://blog.kraken.com/post/1150/bitcoin-cash-and-a-critical-alert-for-bitcoin-margin-traders/
Ledger
https://blog.ledger.co/securing-your-free-bitcoin-cash-stash-d50aff765688
OKCoin
https://www.okcoin.com/t-429.html
ShapeShift
https://info.shapeshift.io/blog/2017/07/27/important-bitcoin-hard-fork-information
TREZOR
https://blog.trezor.io/trezor-advisory-uasf-chain-split-fork-2f95cf2c11a0
ViaBTC
https://medium.com/@ViaBTC/statement-on-bitcoin-user-activated-hard-fork-6e7aebb67e67
Peter, Crypto-Trader Club