Hi Patrick, I see no issue here, the Security Identifier EY R735QTJ8XC9X refers to NewMarket Corp., and its actual ticker is NEU
Similarly, MNES R735QTJ8XC9X refers to Mine Safety Appliances Co., and its actual ticker is MSA.
Just a little of context, our Security identifier doesn't change with changes in the security's ticker.
The Security identifier two parts needed to identify any security.
<TICKER>-<Base36Code>
The TICKER is the first ticker the security has when listed.
The Base36Code, or equities it only encodes the Market (USA) and the listing date (starting from 1998-01-02)
For complex securities like options, it also encodes expiry dates, strike prices, etc.