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Does anybody know of any "Quant Firms and or Accounting firms "publicly traded" on a international stock exchange

Try with Google :)

Quant Firms:
  1. Two Sigma Investments - Although not publicly traded, it's one of the most well-known quant-driven investment firms. For publicly traded companies, you might look at investment banks and financial services companies that use quantitative strategies, such as:
    • Goldman Sachs Group Inc. (NYSE: GS)
    • JPMorgan Chase & Co. (NYSE: JPM)
  2. Renaissance Technologies - Another leading quant firm, also not publicly traded, but its success has influenced many publicly traded financial institutions to adopt quant strategies.

Accounting Firms:
  1. BDO Unibank, Inc. (PSE: BDO) - While primarily a bank, BDO offers accounting and financial services through its subsidiaries.
  2. CBIZ, Inc. (NYSE: CBZ) - Provides professional business services, including accounting, to various companies.
  3. RSM International - While not publicly traded itself, it is a network of accounting firms, some of which might be part of publicly traded entities through their diverse service offerings.
 
H&R Block are publicly traded and have some accounting services for small businesses. Not that it's really an accountancy firm in the normal sense.

For quant traders, I suggest VIRTU Financial Inc. , Flow Traders and Man AHL (a quant division of a publicly traded investment company)

Maybe they don't count for OP's requirements, as all three are probably already crypto traders by now.