You can check out Countinghouse Fund. I particularly liked it because I trade Forex and it has a lot to do with Forex. It's already trading and I actually bought some from the ICO. Then there's Thinkcoin too. It's from Thinkmarket company. You can Google them and make your own informed decision.
Those both seem to be ICO's though and not security tokens. I'm looking more along the lines of STO's like Corl (https:corl.io)
Oh. But security tokens can do ICOs too yeah? Because I read their Whitepaper and they said they're security tokens. And that's why they can only trade on decentralized Exchanges not centralized like Utility tokens
My understanding is that an STO is a token offering similar to an ICO, but the main difference is that STOs are regulated (e.g. registered with the SEC). If it is actually a security token, their offering would be labeled as an STO as opposed to an ICO.