Two notable pioneers in this field are Bloomberg and Stochastic AI:

1) BloombergGPT:

a) Introducing BloombergGPT, Bloomberg’s 50-billion parameter large language model, purpose-built from scratch for finance:

https://www.bloomberg.com/company/press/bloomberggpt-50-bill...

b) BloombergGPT: A Large Language Model for Finance:

https://arxiv.org/abs/2303.17564

2) Stochastic AI:

a) xFinance: How to outperform BloombergGPT without breaking the bank:

https://www.stochastic.ai/blog/xfinance-vs-bloomberg-gpt/

b) xTuring website:

https://xturing.stochastic.ai/

c) xTuring: Easily build, customize and control your own LLMs:

https://github.com/stochasticai/xturing