you only need to hold the "key". the key is called the private key. if you have it, you can claim this fork coins and all the future fork coins that are similar.

tell us which wallet you use so we can tell you if you have access to the private keys or not.
if you are using bitcoin wallets like Bitcoin Core, Armory, Electrum, Multibit, Blockchain.info,... you have the private keys
if you are using services like Coinbase, Xapo, exchanges,... as you wallet then you do not have the private keys and you will only receive the forked coins IF these services decide to be generous and give them to you.